WO2018074352A1 - Detected unit for movement sensor, and liquid level detecting device provided with same - Google Patents

Detected unit for movement sensor, and liquid level detecting device provided with same Download PDF

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Publication number
WO2018074352A1
WO2018074352A1 PCT/JP2017/037148 JP2017037148W WO2018074352A1 WO 2018074352 A1 WO2018074352 A1 WO 2018074352A1 JP 2017037148 W JP2017037148 W JP 2017037148W WO 2018074352 A1 WO2018074352 A1 WO 2018074352A1
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WO
WIPO (PCT)
Prior art keywords
unit
sensor
connection
detected
base
Prior art date
Application number
PCT/JP2017/037148
Other languages
French (fr)
Japanese (ja)
Inventor
明 坂牧
Original Assignee
日本精機株式会社
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Publication date
Application filed by 日本精機株式会社 filed Critical 日本精機株式会社
Publication of WO2018074352A1 publication Critical patent/WO2018074352A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G01F23/36—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using electrically actuated indicating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/32—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements
    • G01F23/38—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using rotatable arms or other pivotable transmission elements using magnetically actuated indicating means

Definitions

  • the present invention relates to a detection unit for a movement sensor and a liquid level detection device including the same.
  • the detected unit for the movement sensor includes a movable body that operates following the movement, and a sensor unit that changes an electric signal to the detection unit according to the operation of the movable body.
  • the sensor unit includes a base unit.
  • the amount of movement is detected as a change in the electrical signal by the sensor unit.
  • a float that is displaced as the liquid level changes is connected to a movable body of a detection unit for a movement sensor, and the sensor unit is based on a liquid fuel tank or the like.
  • the liquid level is detected from a change in resistance accompanying the movement of the contact position between the conductor electrode of the sensor unit and the contact point of the movable body.
  • An electric signal from the sensor unit is led out to the outside through a connector or the like outside the base unit, and the sensor unit and the base unit have an integral structure.
  • Patent Document 1 after the liquid level detection device is installed in a fuel tank or the like, a connector on the vehicle side or the like is connected to a connector on the outside of the base part to perform final assembly.
  • external force applied during assembly is applied to the sensor part.
  • Directly transmitted there is a risk of problems in detection accuracy.
  • the sliding resistance type there is a problem that the contact state between the contact point of the conductor electrode and the movable body changes or the contact position shifts.
  • the non-contact magnetic type there is a problem that a deviation between the rotation center axis of the magnet and the magnetic sensor occurs.
  • the present invention has been made in view of the above problems, and provides a detection unit for a movement sensor that can reduce the influence of an external force applied during assembly and detect the movement accurately, and a liquid level detection device including the detection unit.
  • the purpose is to provide.
  • a detected unit for a movement sensor comprises: A movable body that operates following the movement of the detected body; A sensor unit that gives a change in an electrical signal to the detection unit in accordance with the operation of the movable body; A base part that is formed separately from the sensor part and is installed at a detection position for detecting the movement of the detected object and that derives an electrical signal from the sensor part to the outside;
  • the sensor unit and the base unit include a first connection unit that performs an electrical connection for deriving an electrical signal from the sensor unit to the outside of the base unit, and the sensor unit and the base unit.
  • a second connecting part for performing the mechanical connection of It is characterized by that.
  • a liquid level detection apparatus including a detected unit for a movement sensor according to the second aspect of the present invention, Comprising a detected unit for the movement sensor;
  • the detected body is a liquid level, Connected to the movable body is a float that is displaced as the liquid level fluctuates. It is characterized by that.
  • the influence of external force applied during assembly can be reduced and detection can be performed with high accuracy.
  • FIG. 1A is a perspective view of a disassembled state
  • FIG. 2B is a perspective view of a receiving side connecting portion
  • FIG. 3C is a perspective view of an assembled state. is there. It is a perspective view of the assembly state of other one Embodiment of the to-be-detected unit for the movement sensors of this invention.
  • FIG. 3C is a perspective view of the assembly state of other one Embodiment of the to-be-detected unit for the movement sensors of this invention.
  • FIG. 3C is a perspective view of the assembly state of other one Embodiment of the to-be-detected unit for the movement sensors of this invention.
  • It is the schematic front view and schematic expanded view which show other one Embodiment of a liquid level detection apparatus provided with the to-be-detected unit for the movement sensors of this invention.
  • a detection unit 100 for a movement sensor according to the present invention detects a movable body 10 that operates following the movement of the detection target and the movement of the movable body 10.
  • the sensor unit 20 that gives an electrical signal change to the unit 21 and the sensor unit 20 formed separately from the sensor unit 20 are installed at a detection position for detecting the movement of the detected object, and the electrical signal from the sensor unit 20 is sent to the outside.
  • the liquid level detection apparatus 1 including the detection unit 100 (for movement sensor) of the present invention includes the detection unit 100 for movement sensor, the detection target is a liquid level, and the liquid level is set on the movable body 10.
  • the float 60 that is displaced in accordance with the fluctuation is connected.
  • the liquid level detection device 1 is installed in the opening 3 on the upper surface of a fuel tank 2 that stores liquid fuel such as gasoline, and detects the vertical movement (displacement) of the float 60 that floats in the liquid according to the liquid level. This is transmitted to the movable body 10 constituting the unit 100.
  • the sensor unit 20 of the movable body 10 is provided with, for example, a contact portion 22 constituting a detection unit 21, and a conductor electrode 24 and a resistor 25 are formed on an insulating substrate 23 fixed to the sensor unit 20.
  • a contact portion 22 constituting a detection unit 21, and a conductor electrode 24 and a resistor 25 are formed on an insulating substrate 23 fixed to the sensor unit 20.
  • the electrical resistance from one end portion of the resistor 25 connected via the conductor electrode 24 to the contact portion 22 changes depending on the contact position.
  • the movable body 10 of the sensor unit 20 is movable due to the displacement of the float 60, and the liquid level is electrically changed from the electric resistance change of the resistor 25 accompanying the change in the contact position of the contact part 22 of the detection unit 21 and the conductor electrode 24.
  • the movable body 10 is composed of a single rotating arm 11, and a base end portion of the rotating arm 11 is rotatably supported by a bearing portion 13 of the sensor unit 20 by a shaft portion 12.
  • a contact portion 22 constituting the detection portion 21 is provided on the back side so as to protrude toward the front surface side of the sensor portion 20 at the tip portion of the movable body 10 opposite to the shaft portion 12 of the rotating arm 11.
  • the sensor unit 20 is, for example, a sliding resistance type, and an insulating substrate 23 is attached to the surface side.
  • an insulating substrate 23 is attached to the surface side.
  • a plurality of conductor electrodes 24 are arranged in a fan shape along the rotation path of the rotation arm 11 of the movable body 10, and the contact portion 22 of the rotation arm 11 slides on the conductor electrode 24.
  • a resistor 25 is provided so as to continuously cover a part of each conductor electrode 24 (fan-shaped outer periphery).
  • the insulating substrate 23 is made of, for example, ceramic, and the conductor electrode 24 and the resistor 25 are formed by printing.
  • the base unit 30 is formed of a synthetic resin separately from the sensor unit 20, and the sensor unit 20 is installed at a detection position for detecting the movement of the detection target, and an electric signal from the sensor unit 20 is derived to the outside. Is to do.
  • the base unit 30 is for fixing the detected unit 100 to the opening 3 of the fuel tank 2 in a state where the sensor unit 20 is connected, for example, a lid plate unit 31 covering the opening 3, and a lid A flange portion 32 around the plate portion 31 is provided.
  • the lid plate portion 31 is large enough to close the opening 3 and is formed in, for example, a disc shape, and a ring-shaped collar portion 32 is formed integrally with the disc-like lid plate portion 31.
  • a notch 33 for positioning is formed in the collar portion 32, and is fitted into a protrusion (not shown) formed so as to protrude into the opening 3 of the fuel tank 2, so that the base portion 30
  • the attachment direction can be a predetermined direction, and the movable direction of the movable body 10 of the sensor unit 20 can be determined.
  • the base 30 is attached to the opening 3 of the fuel tank 2 via a packing with a hook or a screw (not shown) to make the fuel tank 2 airtight.
  • a first connection unit 40 that performs an electrical connection for deriving an electrical signal from the sensor unit 20 to the outside of the base unit 30;
  • a second connecting portion 50 is provided for mechanically connecting the sensor portion 20 and the base portion 30.
  • the base portion 30 is integrally formed of synthetic resin so that the connector main body portion 34 protrudes to the back side of the collar portion 32.
  • a connector connecting portion 35 that can be connected to the connector main body 34 is integrally formed of synthetic resin.
  • a first connecting portion 40 and a second connecting portion 50 are provided on the connector main body portion 34 and the connector connecting portion 35.
  • the connector main body portion 34 of the base portion 30 includes a hollow substantially rectangular parallelepiped outer frame portion 34a.
  • the connector connecting portion 35 of the sensor unit 20 includes a hollow, substantially rectangular parallelepiped outer frame portion 35 a having the same outer shape as the connector main body portion 34. Thereby, the connector connector 35 on the detachable side can be connected to or separated from the connector main body 34 on the fixed side, and the sensor unit 20 can be connected to the base unit 30 so that it can be electrically and mechanically connected. It is.
  • the first connection portion 40 includes a plurality of insertion side terminals (insertion side connection portions) 41 constituting an electrical connection portion at the center of the outer frame portion 34a of the connector main body portion 34, as necessary.
  • two insertion side terminals (tab portions) 41 are arranged side by side and protruded toward the sensor portion 20 and are insert-molded.
  • the insertion-side terminal 41 is formed in a plate shape, and a projection serving as a fitting convex portion (connection holding portion) 41a that holds the connection state is projected from the plate-like surface.
  • the insertion side terminal 41 is provided with the maximum necessary number, for example, three for each sensor unit 20 (20A) to be attached and detached, and the necessary number (two) is used according to the sensor unit 20 to be used, Do not use the rest (one) and try to make it common.
  • the two insertion-side terminals 41 are connected to terminals of the output connector 36 outside the collar portion 32 of the base portion 30 and lead out detection signals to the outside.
  • the first connecting portion 40 includes receiving-side terminals (receiving-side connecting portions) 42 into which the insertion-side terminals 41 are inserted and connected.
  • the two receiving-side terminals 42 include the same number as the insertion-side terminals 41.
  • the receiving side terminal 42 includes a contact plate portion 42a with which the plate-shaped surface of the insertion side terminal 41 contacts, and a locking bent portion 42b bent to the inside of both side edges. I have.
  • the receiving terminal 42 is a hole that becomes a fitting recess (connection holding portion) 42c that holds the connection state by fitting the fitting convex portion 41a of the insertion side terminal 41 to the contact plate portion 42a formed in a plate shape. Is formed.
  • the two receiving-side terminals 42 are assembled in a connected state for easy assembly, and after assembly, the two receiving-side terminals 42 are cut by a broken line cutting portion 42d in the drawing.
  • One of the front end portions of the two receiving terminals 42 is connected to the contact portion 22 of the sensor portion 20 described above, and the other is connected to the conductor electrode 24 at one end portion of the resistor 25.
  • connection state of the insertion side terminal 41 and the receiving side terminal 42 is hold
  • the insertion side terminal 41 was provided in the base part 30, and the receiving side terminal 42 was provided in the sensor part 20, you may make it arrange
  • the second connection portion 50 includes a hook portion (engagement convex portion) 51 and a locking hole portion (engagement concave portion) 52 with which the hook portion (engagement convex portion) 51 is engaged.
  • Two hook parts 51 are provided and formed integrally with the connector connecting part 35, and a substantially right-angled locking step part 51a is provided on the outer side. That is, for example, as shown in FIG. 2, the hook portion 51 of the second connection portion 50 is disposed on both sides of the outer frame portion 35 a of the sensor portion 20 so as to protrude toward the base portion 30 side.
  • a stop step portion 51a is disposed outside.
  • the locking hole 52 is formed of a rectangular through hole 52 a that can lock the locking step 51 a of the hook 51, and is integrally formed with the connector main body 34.
  • the locking hole portion 52 is provided as a through-hole portion 52 a formed on the side surface portion of the outer frame portion 34 a of the base portion 30, for example.
  • the locking stepped portions 51 a of the two hook portions 51 are locked to the through-hole portions 52 a of the two locking hole portions 52, so that they can be mechanically connected.
  • the sensor unit 20 and the base unit 30 are separated and electrically connected by the first connection unit 40 and mechanically by the second connection unit 50.
  • the detected unit 100 can be configured.
  • the sensor unit 20 and the base unit 30 are separate. Since the first connection portion 40 and the second connection portion 50 are connected to each other, there is play in each of the connection portions 40 and 50, and this play can alleviate the influence of external force. It is possible to prevent the displacement of the contact portion 22 of the sensor unit 20 due to the above, and to detect it with high accuracy.
  • the sensor unit 20 and the base unit 30 are separated and electrically connected by the first connection unit 40 and mechanically connected by the second connection unit 50, whereby the detected unit 100 is When the shape of the opening 3 of the fuel tank 2 to be installed, the take-out direction of the output connector 36, and the like are different, it can be easily dealt with by preparing only the base 30. That is, as shown in FIG. 3, the detected unit 100 is configured to turn the positioning notch 33 and the output connector 36 of the base unit 30 counterclockwise by 90 degrees with respect to the direction of the connector main body 34. It is in a rotated state, and the orientation of the positioning notch 33 and the output connector 36 of the base unit 30 can be handled only by the base unit 30 without changing the rotational direction of the movable body 10 in the sensor unit 20. can do.
  • the first connection part 40 to be electrically connected and the second connection part 50 to be mechanically connected are provided and configured.
  • Two connecting portions 50 may be shared by one connecting portion 40 (50).
  • mechanical connection is made possible by the fitting convex part 41a and the fitting concave part 42c constituting the connection holding part of the first connection part 40.
  • a terminal portion that comes into contact by connection between the hook portion 51 and the locking hole portion 52 of the second connection portion 50 is provided so that electrical connection can be made.
  • a plurality of terminal portions are provided using the front and back surfaces of one hook portion 51, and the necessary total number of terminal portions is provided.
  • the liquid level detection device 1 including the detection unit 100 (for movement sensor) of the present invention includes the detection unit 100 for movement sensor.
  • the movable body 10 is connected to a movable body 10 via an arm 61 that is displaced as the liquid level changes, so that the movable body 10 responds to the displacement of the float 60.
  • a base portion 30 is installed in an opening 3 on the upper surface of a fuel tank 2 that stores liquid fuel such as gasoline, and a sensor unit 20 is disposed inside the fuel tank 2.
  • the sensor unit 20 transmits the vertical movement (displacement) of the float 60 floating in the liquid according to the liquid level to the movable body 10 constituting the detected unit 100 via the arm 61.
  • the sensor unit 20 of the movable body 10 is provided with the contact portion 22 constituting the detection unit 21, and the conductor electrode 24 and the resistor 25 are formed on the insulating substrate 23 fixed to the sensor unit 20.
  • the contact portion 22 slides on the conductor electrode 24.
  • the electrical resistance from one end of the resistor 25 connected through the conductor electrode 24 to the contact 22 changes depending on the contact position of the contact 22.
  • the liquid level detection device 1 causes the electric resistance of the resistor 25 to be changed in accordance with the change in the contact position of the contact portion 22 of the detection unit 21 and the conductor electrode 24 due to the response of the movable body 10 of the sensor unit 20 due to the displacement of the float 60.
  • the liquid level is detected electrically from the change.
  • the base portion 30 is a separate body and is connected by the first connection portion 40 and the second connection portion 50, and there is play in each of the connection portions 40, 50, and this play alleviates the influence of external force. Therefore, it is possible to prevent the displacement of the contact portion 22 of the sensor unit 20 due to the movable body 10 and to detect the liquid level with high accuracy.
  • the shape of the base portion 30 differs depending on the shape of the opening 3 of the fuel tank 2, so the base portion 30 must be changed for each vehicle type. Since the sensor unit 20 and the base unit 30 can be separated from each other, only the base unit 30 needs to be newly prepared, and the vehicle type can be easily changed.
  • the detected unit 100A is configured by a contactless magnetic sensor instead of the already described sliding resistance type. That is, the detected unit 100A includes a sensor unit 20A that is a magnetic sensor, and the sensor unit 20A is configured to be connected to the common base unit 30 described in the above embodiment.
  • the detected unit 100A includes a sensor unit 20A including a columnar magnet 110 and a holder 120 surrounding the magnet 110, and the magnet 110 and the holder 120 rotate integrally around a central axis 110a of the magnet 110.
  • the magnetic detection element 131 is configured to give a magnetic change.
  • the liquid level detection apparatus 1A including the detected unit 100A includes the detected unit 100A, and is configured by connecting a float 140 that is displaced with a change in the liquid level to the holder 120.
  • a sensor unit 20A is installed in a fuel tank (not shown) that stores liquid fuel such as gasoline, and the vertical movement (displacement) of the float 140 that floats in the liquid according to the liquid level is detected. This is transmitted to the rotating holder 120 of the unit 100A.
  • the holder 120 to which the magnet 110 is attached is supported by the main body 150 so as to be rotatable around a horizontal axis.
  • the main body 150 is provided with a magnetic detection unit 130 including a magnetic detection element 131 facing the central axis 110 a of the magnet 110. Thereby, the liquid level is detected by detecting the magnetic change of the magnet 110 accompanying the rotation of the holder 120 due to the displacement of the float 140 by the magnetic detection element 131 of the magnetic detection unit 130.
  • the magnet 110 has a cylindrical shape, and is made of, for example, neodymium or a ferrite material, and the magnet 110 is magnetized in this case with two poles.
  • the periphery of the magnet 110 is surrounded by the holder 120.
  • the magnet 110 is rotated integrally with the holder 120 about the central axis 110 a of the magnet 110 while being accommodated in the holder 120.
  • the magnet 110 has a holding recess 113 formed on at least one end surface 111, in the illustrated example, the end surface 111 a on the front side for coupling with the holder 120.
  • the holding recess 113 is provided in a direction orthogonal to the tangent to the magnet 110 in the rotation direction of the holder 120, and here, is formed in a radial direction passing through the central axis 110 a of the magnet 110.
  • the holding recess 113 of the magnet 110 is formed with a protruding portion 124 that is fitted when resin is inserted during insert molding of the holder 120, and functions to prevent the magnet 110 and the holder 120 from rotating.
  • the holding recess 113 is formed on a straight line of the end surface 111 of the magnet 110. However, the holding recess 113 may be formed by dividing on a straight line, or may be formed at a position not on the straight line. I just want to be able to prevent rotation.
  • the holding recess 113 is not limited to being provided on the front side end surface 111a of the magnet 110, but may be provided on the back side end surface 111b or on the front and back side end surfaces 111.
  • the holder 120 is made of a resin material such as polyacetal, and the magnet 110 is surrounded and fixed by insert molding.
  • the holder 120 is integrally formed of a cylindrical cylindrical portion 120a that surrounds and holds the side peripheral surface 112 of the magnet 110, and end surfaces 120b and 120c that block both ends (front and back sides) of the cylindrical portion 120a.
  • the holder 120 is formed with a hole-shaped rotational bearing portion 125 penetrating through the center portion on the end surface 120c on the back side.
  • the inner surface of the rotary bearing portion 125 is supported so as to be able to rotate in sliding contact with the outer peripheral surface of the columnar rotary shaft portion 153 of the main body portion 150.
  • a portion of the magnet 110 on the back side of the magnet 110 is exposed from the holder 120 by a hole-shaped rotation bearing portion 125.
  • the holder 120 is integrally formed with a front end surface 120b so that a cylindrical rotation shaft portion 126 protrudes to the front side.
  • the rotation shaft portion 126 is supported rotatably so that the outer peripheral surface is in sliding contact with the inner peripheral surface of the rotation bearing portion 161 of the cover 160 that covers the front side of the main body portion 150.
  • the holder 120 to which the magnet 110 is attached is supported on the back side by the rotary bearing part 125 and the rotary shaft part 153 of the main body part 150, and on the front side by the rotary shaft part 126 and the rotary bearing part 161 of the cover 160.
  • Is supported by the main body 150 and the cover 160 so as to be rotatable in a straight line around the horizontal axis that is the central axis 110a of the magnet 110.
  • the detected unit 100 ⁇ / b> A configured as described above supports the magnet 110 including the holder 120 so as to be rotatable about the central axis 110 a, and the magnet 110 of the holder 120 detects the magnetic detection of the magnetic detection element 131 of the magnetic detection unit 130. Arrange to face the surface. Then, the magnetic detection element 131 detects the magnetic change of the magnet 110 accompanying the rotation operation of the holder 120.
  • the main body 150 is provided with a magnetic detection unit 130 including a magnetic detection element 131 inside the front side.
  • the magnetism detection element 131 is arranged to face the magnet 110 accommodated in the holder 120, and the magnetism detection element 131 detects a magnetic change of the magnet 110 due to the rotation operation of the holder 120.
  • the magnetic detection element 131 is composed of, for example, a Hall IC.
  • the magnetic detection unit 130 includes three lead terminals 132 and includes a lead terminal 132a to be grounded and two lead terminals 132a for supplying power and transmitting a detection signal.
  • the insertion base terminal 41 is provided with the maximum necessary number, for example, three for each of the detachable sensor parts 20A (20), as shown in FIG.
  • the required number (three) is used in accordance with the sensor unit 20A to be used, and the sensor unit 20 uses only two and does not use the remaining (one), thereby achieving commonality.
  • the connector connecting portion 35 of the main body 150 is provided with a hook portion 51 of the second connecting portion 50, and is mechanically engaged with the locking hole 52 of the connector main body 34 of the base portion 30.
  • the sensor unit 20A and the base unit 30 are connected and connected by the first connection unit 40 and the second connection unit 50, so that the detected unit for the movement sensor by the contactless magnetic sensor unit 20A. 100A.
  • a liquid level detection apparatus 1A using such a detected unit 100A is configured by connecting a float 140 that is displaced with a change in the liquid level to a holder 120. That is, the holder 120 is formed with an arm holding portion 127 on the outer periphery of the intermediate portion, and the float arm 141 connected to the float 140 that moves up and down according to the liquid level is fixed to the arm holding portion 127. Accordingly, the vertical movement of the float 140 is transmitted to the float arm 141, and the holder 120 is rotated about the rotation shaft portion 153 and the rotation bearing portion 161 of the main body 150 via the float arm 141.
  • the sensor unit 20A and the base unit 30 are separated and electrically connected by the first connection unit 40, and the machine by the second connection unit 50.
  • the detected unit 100A can be configured.
  • the sensor unit 20A and the base unit 30 Are separate bodies and are connected by the first connection portion 40 and the second connection portion 50, so there is play in each connection portion 40, 50, and this play can alleviate the influence of external force.
  • the sensor unit 20A and the base unit 30 are separated and electrically connected by the first connection unit 40 and mechanically connected by the second connection unit 50, whereby the detected unit 100A is
  • the shape of the opening 3 of the fuel tank 2 to be installed, the take-out direction of the output connector 36, and the like are different, it can be easily dealt with by preparing only the base 30. Furthermore, changes in specifications between the sensor unit 20 and the sensor unit 20A can be easily handled.
  • the liquid level detection device 1A when the liquid level detection device 1A is mounted on, for example, a vehicle, an external force is applied during assembly for connecting a harness for deriving a detection signal to the output connector 36 of the base unit 30.
  • the base portion 30 is a separate body and is connected by the first connection portion 40 and the second connection portion 50, and there is play in each of the connection portions 40 and 50, and this play alleviates the influence of external force. Therefore, it is possible to prevent misalignment of the magnetic detection element 131 with respect to the magnet 110 of the sensor unit 20A, and to detect with high accuracy.
  • the shape of the base portion 30 varies depending on the shape of the opening 3 of the fuel tank 2, and therefore the base portion 30 must be changed for each vehicle type. Since the sensor unit 20A and the base unit 30 can be separated, only the base unit 30 needs to be newly prepared, and it is possible to easily cope with a change in the vehicle type. Furthermore, changes in specifications between the sensor unit 20 and the sensor unit 20A can be easily handled.
  • the movable body 10 that operates following the movement of the detected body, and the movable body 10
  • the sensor units 20 and 20A that change the electrical signal to the detection unit 21 according to the operation of the sensor unit 20 and the sensor units 20 and 20A are formed separately from the sensor units 20 and 20A.
  • a base part 30 for deriving electrical signals from the sensor parts 20 and 20A to the outside.
  • the sensor parts 20 and 20A and the base part 30 are provided with electrical signals from the sensor parts 20 and 20A.
  • the sensor unit 20, 20A and the base And 30 to separate from, as well as electrically connected with the first connecting portion 40, by mechanically connecting the second connecting portion 50 can be configured to be detected unit 100, 100A. Even when an external force is applied during assembly such as when a harness for deriving a detection signal is connected to the output connector 36 of the detected units 100 and 100A, the sensor units 20 and 20A and the base unit 30 are separated. Since it is a body and is connected by the first connection part 40 and the second connection part 50, there is play in each connection part 40, 50, and the influence of external force can be reduced by this play, The positional deviation of the contact part 22 of the sensor parts 20 and 20A by the movable body 10 can be prevented and can be detected with high accuracy.
  • the sensor units 20, 20 ⁇ / b> A and the base unit 30 are separated and electrically connected by the first connection unit 40 and mechanically connected by the second connection unit 50.
  • the take-out direction of the output connector 36, and the like are different, it can be easily dealt with by preparing only the base 30.
  • changes in specifications between the sensor unit 20 and the sensor unit 20A can be easily handled.
  • the first connection part 40 has either one of the sensor parts 20 and 20A and the base part 30 as an insertion side terminal (insertion side connection part). 41, one of which is constituted by a receiving terminal (receiving side connecting portion) 42 to which the insertion side terminal is connected, and the insertion side terminal 41 and the receiving side terminal 42 hold the mutual connection state. Since the connection holding portions 41a and 42c are provided, the insertion side connection portion 41 and the receiving side connection portion 42 can be easily connected and the connection state can be held by the connection holding portions 41a and 42c. An electrical connection can be made reliably.
  • the second connecting portion 50 has either one of the sensor portions 20 and 20A or the base portion 30 as a hook portion (engagement convex portion) 51. Since either one of the other is formed by a locking hole (engagement recess) 52, the mechanical connection can be easily established by the engagement between the engagement protrusion 51 and the engagement recess 52. Can do.
  • the first connection portion 40 and the second connection portion 50 are also used, and electrical connection and mechanical connection can be performed only by either one. By doing so, electrical connection and mechanical connection can be more easily performed.
  • the detection unit 100, 100A for the movement sensor is provided, the detection target is the liquid level,
  • the change in the liquid level can be detected by the displacement of the float 60.
  • an external force is applied during assembly for connecting a harness for deriving a detection signal to the output connector 36 of the base unit 30.
  • the sensor units 20 and 20A and the base unit 30 are connected to each other. It is a separate body and is connected by the first connection portion 40 and the second connection portion 50, and there is play in each connection portion 40, 50.
  • the influence of external force can be reduced, and the sensor portion 20, 20A can prevent misalignment and can be detected with high accuracy.
  • the shape of the base portion 30 differs depending on the shape of the opening 3 of the fuel tank 2, so the base portion 30 must be changed for each vehicle type.
  • the sensor units 20 and 20A and the base unit 30 can be separated, only the base unit 30 needs to be newly prepared, and it is possible to easily cope with a change in the vehicle type. Furthermore, changes in specifications between the sensor unit 20 and the sensor unit 20A can be easily handled.

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  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

Provided are a detected unit for a movement sensor capable of performing accurate detection by mitigating the impact of an external force applied during assembly, and a liquid level detecting device provided with the same. A detected unit 100 comprises: a movable body which operates by following the movement of an object being detected; a sensor portion 20 which imparts an electrical signal change to a detecting portion 21 in accordance with the operation of the movable body; and a base portion 30 which is formed separately from the sensor portion 20, positions the sensor portion 20 in a detecting position for detecting the movement of the object being detected and leads the electrical signal from the sensor portion 20 to the outside. The sensor portion 20 and the base portion 30 are each provided with a first connecting portion 40 which effects an electrical connection to lead the electrical signal from the sensor portion 20 to the outside of the base portion 30, and a second connecting portion 50 which effects a mechanical connection between the sensor portion 20 and the base portion 30.

Description

移動センサ用の被検出ユニットおよびこれを備えた液面検出装置Detected unit for movement sensor and liquid level detecting device having the same
　本発明は、移動センサ用の被検出ユニットおよびこれを備えた液面検出装置に関する。 The present invention relates to a detection unit for a movement sensor and a liquid level detection device including the same.
　移動センサ用の被検出ユニットは、移動に追従して動作する可動体と、可動体の動作に応じて検出部に電気信号の変化を与えるセンサ部とを備え、センサ部は、基台部を介して検出位置に設置し、センサ部によって移動量などを電気信号の変化として検出する。
　例えば、特許文献１に開示された液面検出装置では、移動センサ用の被検出ユニットの可動体に液面の変動に伴って変位するフロートを連結し、センサ部を液体燃料のタンクなどに基台部で固定しておき、センサ部の導体電極と可動体の接点部との接触位置の移動に伴う抵抗変化から液面を検出する。センサ部からの電気信号は、基台部の外側のコネクタなど介して外部に導出され、センサ部と基台部は、一体構造とされている。 The detected unit for the movement sensor includes a movable body that operates following the movement, and a sensor unit that changes an electric signal to the detection unit according to the operation of the movable body. The sensor unit includes a base unit. The amount of movement is detected as a change in the electrical signal by the sensor unit.
For example, in the liquid level detection device disclosed in Patent Document 1, a float that is displaced as the liquid level changes is connected to a movable body of a detection unit for a movement sensor, and the sensor unit is based on a liquid fuel tank or the like. The liquid level is detected from a change in resistance accompanying the movement of the contact position between the conductor electrode of the sensor unit and the contact point of the movable body. An electric signal from the sensor unit is led out to the outside through a connector or the like outside the base unit, and the sensor unit and the base unit have an integral structure.
特開２０００－１３６９５６号公報JP 2000-136956 A
　特許文献１では、液面検出装置を燃料タンクなどに設置した後、基台部の外側のコネクタに車両側などのコネクタを連結して最終組立を行うが、組立時に加わる外力などがセンサ部に直接伝達され、検出精度に問題が生じる恐れがある。例えば、摺動抵抗式の場合には、導体電極と可動体の接点部の接触状態が変化したり、接触位置がずれるなどの問題がある。また、無接点磁気式などの場合には、磁石の回動中心軸と磁気センサのずれが生じるなどの問題がある。 In Patent Document 1, after the liquid level detection device is installed in a fuel tank or the like, a connector on the vehicle side or the like is connected to a connector on the outside of the base part to perform final assembly. However, external force applied during assembly is applied to the sensor part. Directly transmitted, there is a risk of problems in detection accuracy. For example, in the case of the sliding resistance type, there is a problem that the contact state between the contact point of the conductor electrode and the movable body changes or the contact position shifts. Further, in the case of the non-contact magnetic type, there is a problem that a deviation between the rotation center axis of the magnet and the magnetic sensor occurs.
　本発明は、上記問題点に鑑みてなされたものであり、組立時に加わる外力の影響を緩和して精度良く検出することができる移動センサ用の被検出ユニットおよびこれを備えた液面検出装置を提供することを目的とする。 The present invention has been made in view of the above problems, and provides a detection unit for a movement sensor that can reduce the influence of an external force applied during assembly and detect the movement accurately, and a liquid level detection device including the detection unit. The purpose is to provide.
　上記目的を達成するため、本発明の第１の観点に係る移動センサ用の被検出ユニットは、
　被検出体の移動に追従して動作する可動体と、
　前記可動体の動作に応じて検出部に電気信号の変化を与えるセンサ部と、
　前記センサ部と別体に形成され前記センサ部を前記被検出体の移動を検出する検出位置に設置し前記センサ部からの電気信号を外部に導出する基台部とを有し、
　前記センサ部と前記基台部には、前記センサ部からの電気信号を前記基台部の外部に導出する電気的な接続を行う第１の接続部と、前記センサ部と前記基台部との機械的な接続を行う第２の接続部と、を備える、
　ことを特徴とする。 In order to achieve the above object, a detected unit for a movement sensor according to the first aspect of the present invention comprises:
A movable body that operates following the movement of the detected body;
A sensor unit that gives a change in an electrical signal to the detection unit in accordance with the operation of the movable body;
A base part that is formed separately from the sensor part and is installed at a detection position for detecting the movement of the detected object and that derives an electrical signal from the sensor part to the outside;
The sensor unit and the base unit include a first connection unit that performs an electrical connection for deriving an electrical signal from the sensor unit to the outside of the base unit, and the sensor unit and the base unit. A second connecting part for performing the mechanical connection of
It is characterized by that.
　また、本発明の第２の観点にかかる移動センサ用の被検出ユニットを備える液面検出装置は、
　前記移動センサ用の被検出ユニットを備え、
　前記被検出体を液面とし、
　前記可動体に、前記液面の変動に伴って変位するフロートを連結した、
　ことを特徴とする。 In addition, a liquid level detection apparatus including a detected unit for a movement sensor according to the second aspect of the present invention,
Comprising a detected unit for the movement sensor;
The detected body is a liquid level,
Connected to the movable body is a float that is displaced as the liquid level fluctuates.
It is characterized by that.
　本発明によれば、組立時に加わる外力の影響を緩和して精度良く検出することができる。 According to the present invention, the influence of external force applied during assembly can be reduced and detection can be performed with high accuracy.
本発明の移動センサ用の被検出ユニットを備える液面検出装置の一実施の形態を示す概略正面図および概略部分拡大図である。It is the schematic front view and schematic enlarged view which show one Embodiment of a liquid level detection apparatus provided with the to-be-detected unit for the movement sensors of this invention. 本発明の移動センサ用の被検出ユニットの一実施の形態に係り、（ａ）は分解状態の斜視図、（ｂ）は受け側接続部の斜視図、（ｃ）は組立状態の斜視図である。1A is a perspective view of a disassembled state, FIG. 2B is a perspective view of a receiving side connecting portion, and FIG. 3C is a perspective view of an assembled state. is there. 本発明の移動センサ用の被検出ユニットの他の一実施の形態の組立状態の斜視図である。It is a perspective view of the assembly state of other one Embodiment of the to-be-detected unit for the movement sensors of this invention. 本発明の移動センサ用の被検出ユニットを備える液面検出装置の他の一実施の形態を示す概略正面図および概略部分拡大図である。It is the schematic front view and schematic expanded view which show other one Embodiment of a liquid level detection apparatus provided with the to-be-detected unit for the movement sensors of this invention.
　以下に、本発明の一実施の形態に係る移動センサ用の被検出ユニットおよびこれを備えた液面検出装置を添付図面に基づいて説明する。
　本発明の移動センサ用の被検出ユニット１００（以下、単に被検出ユニット１００とする。）は、被検出体の移動に追従して動作する可動体１０と、可動体１０の動作に応じて検出部２１に電気信号の変化を与えるセンサ部２０と、センサ部２０と別体に形成されセンサ部２０を被検出体の移動を検出する検出位置に設置しセンサ部２０からの電気信号を外部に導出する基台部３０とを有し、センサ部２０と基台部３０には、センサ部２０からの電気信号を基台部３０の外部に導出する電気的な接続を行う第１の接続部４０と、センサ部２０と基台部３０との機械的な接続を行う第２の接続部５０と、を備えて構成されている。 Hereinafter, a detected unit for a movement sensor according to an embodiment of the present invention and a liquid level detection apparatus including the same will be described with reference to the accompanying drawings.
A detection unit 100 for a movement sensor according to the present invention (hereinafter, simply referred to as a detection unit 100) detects a movable body 10 that operates following the movement of the detection target and the movement of the movable body 10. The sensor unit 20 that gives an electrical signal change to the unit 21 and the sensor unit 20 formed separately from the sensor unit 20 are installed at a detection position for detecting the movement of the detected object, and the electrical signal from the sensor unit 20 is sent to the outside. A first connecting portion for making an electrical connection for deriving an electric signal from the sensor unit 20 to the outside of the base unit 30. 40 and a second connection part 50 for mechanically connecting the sensor part 20 and the base part 30 to each other.
　また、本発明の（移動センサ用の）被検出ユニット１００を備える液面検出装置１は、移動センサ用の被検出ユニット１００を備え、被検出体を液面とし、可動体１０に、液面の変動に伴って変位するフロート６０を連結して構成される。
　液面検出装置１は、例えば、ガソリンなどの液体燃料を貯留する燃料タンク２の上面の開口部３に設置され、液位に応じて液体中に浮くフロート６０の上下動（変位）を被検出ユニット１００を構成する可動体１０に伝達する。可動体１０のセンサ部２０には、例えば検出部２１を構成する接点部２２が設けられ、センサ部２０に固定された絶縁基板２３に導体電極２４および抵抗体２５が形成される。導体電極２４上を接点部２２が摺動することで、接触位置によって導体電極２４を介して接続される抵抗体２５の一端部から接点部２２までの電気抵抗が変化する。
　これにより、フロート６０の変位によるセンサ部２０の可動体１０の可動で、検出部２１の接点部２２と導体電極２４の接触位置の変化に伴う抵抗体２５の電気抵抗変化から液面を電気的に検出する。 Further, the liquid level detection apparatus 1 including the detection unit 100 (for movement sensor) of the present invention includes the detection unit 100 for movement sensor, the detection target is a liquid level, and the liquid level is set on the movable body 10. The float 60 that is displaced in accordance with the fluctuation is connected.
The liquid level detection device 1 is installed in the opening 3 on the upper surface of a fuel tank 2 that stores liquid fuel such as gasoline, and detects the vertical movement (displacement) of the float 60 that floats in the liquid according to the liquid level. This is transmitted to the movable body 10 constituting the unit 100. The sensor unit 20 of the movable body 10 is provided with, for example, a contact portion 22 constituting a detection unit 21, and a conductor electrode 24 and a resistor 25 are formed on an insulating substrate 23 fixed to the sensor unit 20. As the contact portion 22 slides on the conductor electrode 24, the electrical resistance from one end portion of the resistor 25 connected via the conductor electrode 24 to the contact portion 22 changes depending on the contact position.
Thereby, the movable body 10 of the sensor unit 20 is movable due to the displacement of the float 60, and the liquid level is electrically changed from the electric resistance change of the resistor 25 accompanying the change in the contact position of the contact part 22 of the detection unit 21 and the conductor electrode 24. To detect.
　まず、（移動センサ用の）被検出ユニット１００について、図面を参照して説明する。
　可動体１０は、１本の回動アーム１１で構成され、回動アーム１１の基端部が軸部１２によってセンサ部２０の軸受部１３に回動可能に支持されている。
　可動体１０の回動アーム１１の軸部１２と反対側の先端部には、検出部２１を構成する接点部２２がセンサ部２０の表面側に向かって突き出すように裏側に設けてある。 First, the detected unit 100 (for the movement sensor) will be described with reference to the drawings.
The movable body 10 is composed of a single rotating arm 11, and a base end portion of the rotating arm 11 is rotatably supported by a bearing portion 13 of the sensor unit 20 by a shaft portion 12.
A contact portion 22 constituting the detection portion 21 is provided on the back side so as to protrude toward the front surface side of the sensor portion 20 at the tip portion of the movable body 10 opposite to the shaft portion 12 of the rotating arm 11.
　センサ部２０は、例えば摺動抵抗式とされ、表面側に絶縁基板２３が取り付けられている。絶縁基板２３には、導体電極２４が可動体１０の回動アーム１１の回動軌道に沿って扇形に複数配列され、導体電極２４上を回動アーム１１の接点部２２が摺動する。
　各導体電極２４の一部(扇形の外周部分）を連続的に覆うように抵抗体２５が設けられている。絶縁基板２３は、例えばセラミックで構成され、導体電極２４と抵抗体２５とが印刷によって形成される。
　これにより、回動アーム１１が回動すると、回動アーム１１の先端部の接点部２２が導体電極２４上を摺動することにより、絶縁基板２３上の導体電極２４と接点部２２が接触し、その接触した導体電極２４の位置と、一端部の導体電極２４との間の抵抗体２５の抵抗値が変化することになる。この抵抗値の変化に基づく接点部２２と導体電極２４との間を流れる電流変化を検出信号とする。 The sensor unit 20 is, for example, a sliding resistance type, and an insulating substrate 23 is attached to the surface side. On the insulating substrate 23, a plurality of conductor electrodes 24 are arranged in a fan shape along the rotation path of the rotation arm 11 of the movable body 10, and the contact portion 22 of the rotation arm 11 slides on the conductor electrode 24.
A resistor 25 is provided so as to continuously cover a part of each conductor electrode 24 (fan-shaped outer periphery). The insulating substrate 23 is made of, for example, ceramic, and the conductor electrode 24 and the resistor 25 are formed by printing.
As a result, when the rotating arm 11 rotates, the contact portion 22 at the tip of the rotating arm 11 slides on the conductor electrode 24 so that the conductor electrode 24 and the contact portion 22 on the insulating substrate 23 come into contact with each other. The resistance value of the resistor 25 between the contacted conductor electrode 24 and the conductor electrode 24 at one end changes. A change in current flowing between the contact point 22 and the conductor electrode 24 based on this change in resistance value is taken as a detection signal.
　基台部３０は、センサ部２０と別体に合成樹脂で形成されており、センサ部２０を被検出体の移動を検出する検出位置に設置し、センサ部２０からの電気信号を外部に導出するためのものである。基台部３０は、センサ部２０が連結された状態で、例えば燃料タンク２の開口部３に被検出ユニット１００を固定するためのものであり、開口部３を覆う蓋板部３１と、蓋板部３１の周囲のつば部３２とを備えて構成されている。　
　蓋板部３１は、開口部３を塞ぐ大きさで、例えば円板状に形成され、円板状の蓋板部３１にリング状のつば部３２が一体に形成されている。つば部３２には、位置決め用の切り欠き部３３が形成され、燃料タンク２の開口部３に突き出すように形成された突起部（図示せず）に嵌合することで、基台部３０の取り付け方向を所定の方向にすることができ、センサ部２０の可動体１０の可動方向を定めることができる。
　基台部３０は、燃料タンク２の開口部３にパッキンを介して図示しないフックやねじなどで取り付けることで燃料タンク２を気密状態とする。 The base unit 30 is formed of a synthetic resin separately from the sensor unit 20, and the sensor unit 20 is installed at a detection position for detecting the movement of the detection target, and an electric signal from the sensor unit 20 is derived to the outside. Is to do. The base unit 30 is for fixing the detected unit 100 to the opening 3 of the fuel tank 2 in a state where the sensor unit 20 is connected, for example, a lid plate unit 31 covering the opening 3, and a lid A flange portion 32 around the plate portion 31 is provided.
The lid plate portion 31 is large enough to close the opening 3 and is formed in, for example, a disc shape, and a ring-shaped collar portion 32 is formed integrally with the disc-like lid plate portion 31. A notch 33 for positioning is formed in the collar portion 32, and is fitted into a protrusion (not shown) formed so as to protrude into the opening 3 of the fuel tank 2, so that the base portion 30 The attachment direction can be a predetermined direction, and the movable direction of the movable body 10 of the sensor unit 20 can be determined.
The base 30 is attached to the opening 3 of the fuel tank 2 via a packing with a hook or a screw (not shown) to make the fuel tank 2 airtight.
　別体に形成されたセンサ部２０と基台部３０との間には、センサ部２０からの電気信号を基台部３０の外部に導出する電気的な接続を行う第１の接続部４０と、センサ部２０と基台部３０との機械的な接続を行う第２の接続部５０と、が設けられている。
　基台部３０は、コネクタ本体部３４がつば部３２の裏側に突き出すように一体に合成樹脂で成形されている。センサ部２０は、コネクタ本体部３４に接続可能とされたコネクタ連結部３５が一体に合成樹脂で成形されている。
　コネクタ本体部３４とコネクタ連結部３５に、第１の接続部４０と第２の接続部５０が設けられる。基台部３０のコネクタ本体部３４は、中空の略直方体状の外枠部３４ａを備えている。センサ部２０のコネクタ連結部３５は、コネクタ本体部３４と同一外形の中空の略直方体状の外枠部３５ａを備えている。
　これにより、固定側のコネクタ本体部３４に着脱側のコネクタ連結部３５を連結したり、あるいは分離でき、基台部３０にセンサ部２０を接続することで、電気的および機械的に接続できるようにしてある。 Between the sensor unit 20 and the base unit 30 that are formed separately, a first connection unit 40 that performs an electrical connection for deriving an electrical signal from the sensor unit 20 to the outside of the base unit 30; A second connecting portion 50 is provided for mechanically connecting the sensor portion 20 and the base portion 30.
The base portion 30 is integrally formed of synthetic resin so that the connector main body portion 34 protrudes to the back side of the collar portion 32. In the sensor unit 20, a connector connecting portion 35 that can be connected to the connector main body 34 is integrally formed of synthetic resin.
A first connecting portion 40 and a second connecting portion 50 are provided on the connector main body portion 34 and the connector connecting portion 35. The connector main body portion 34 of the base portion 30 includes a hollow substantially rectangular parallelepiped outer frame portion 34a. The connector connecting portion 35 of the sensor unit 20 includes a hollow, substantially rectangular parallelepiped outer frame portion 35 a having the same outer shape as the connector main body portion 34.
Thereby, the connector connector 35 on the detachable side can be connected to or separated from the connector main body 34 on the fixed side, and the sensor unit 20 can be connected to the base unit 30 so that it can be electrically and mechanically connected. It is.
　第１の接続部４０は、コネクタ本体部３４の外枠部３４ａの中央部に、電気的な接続部を構成する挿入側端子(挿入側接続部）４１が必要に応じて複数本、本実施の形態では、２本の挿入側端子（タブ部）４１が並べてセンサ部２０側に突き出して設けられインサート成形されている。挿入側端子４１は、板状に形成され、板状の表面に接続状態を保持する嵌合凸部（接続保持部）４１ａとなる突起が突き出して形成されている。
　なお、挿入側端子４１は、着脱されるそれぞれのセンサ部２０（２０Ａ）での最大必要数、例えば３本設けておき、使用するセンサ部２０に応じて必要本数(２本）を使用し、残り(１本)は使用しないようにし、共通化を図る。
　２本の挿入側端子４１は、基台部３０のつば部３２の外側の出力用コネクタ３６の端子に接続され、検出信号を外部に導出する。
　第１の接続部４０は、挿入側端子４１が挿入接続される受け側端子(受け側接続部）４２を備え、挿入側端子４１と同数、本実施の形態では、２つの受け側端子４２が挿入側端子４１の配置に合わせて並べて外枠部３５ａに設けられインサート成形されている。
　受け側端子４２は、図２（ｂ）に示すように、挿入側端子４１の板状の表面が接触する接触板部４２ａと、その両側縁部の内側に曲げられた係止曲部４２ｂを備えている。受け側端子４２は、板状に形成された接触板部４２ａに、挿入側端子４１の嵌合凸部４１ａが嵌合されて接続状態を保持する嵌合凹部（接続保持部）４２ｃとなる孔が形成されている。
　２つの受け側端子４２は、組み立てを容易とするため、連結された状態で組み立てられ、組み立て後、図中の破線の切断部４２ｄで切断される。
　２つの受け側端子４２の先端部の一方が、既に説明したセンサ部２０の接点部２２に、他方が抵抗体２５の一端部の導体電極２４に接続される。
　このような挿入側端子４１と受け側端子４２で構成した第１の接続部４０により、基台部３０側のコネクタ本体部３４にセンサ部２０側のコネクタ連結部３５を連結することで、センサ部２０から基台部３０の外部までを電気的に接続することができる。また、嵌合凸部４１ａと嵌合凹部４２ｃによって挿入側端子４１と受け側端子４２の接続状態が保持される。
　なお、基台部３０に挿入側端子４１を、センサ部２０に受け側端子４２を設けるようにしたが、これに限らず、逆に配置するようにしても良い。また、挿入側端子４１と受け側端子４２への嵌合凸部と嵌合凹部の配置も逆にしても良い。 The first connection portion 40 includes a plurality of insertion side terminals (insertion side connection portions) 41 constituting an electrical connection portion at the center of the outer frame portion 34a of the connector main body portion 34, as necessary. In this embodiment, two insertion side terminals (tab portions) 41 are arranged side by side and protruded toward the sensor portion 20 and are insert-molded. The insertion-side terminal 41 is formed in a plate shape, and a projection serving as a fitting convex portion (connection holding portion) 41a that holds the connection state is projected from the plate-like surface.
In addition, the insertion side terminal 41 is provided with the maximum necessary number, for example, three for each sensor unit 20 (20A) to be attached and detached, and the necessary number (two) is used according to the sensor unit 20 to be used, Do not use the rest (one) and try to make it common.
The two insertion-side terminals 41 are connected to terminals of the output connector 36 outside the collar portion 32 of the base portion 30 and lead out detection signals to the outside.
The first connecting portion 40 includes receiving-side terminals (receiving-side connecting portions) 42 into which the insertion-side terminals 41 are inserted and connected. In the present embodiment, the two receiving-side terminals 42 include the same number as the insertion-side terminals 41. They are arranged on the outer frame portion 35a in line with the arrangement of the insertion side terminals 41 and are insert-molded.
As shown in FIG. 2 (b), the receiving side terminal 42 includes a contact plate portion 42a with which the plate-shaped surface of the insertion side terminal 41 contacts, and a locking bent portion 42b bent to the inside of both side edges. I have. The receiving terminal 42 is a hole that becomes a fitting recess (connection holding portion) 42c that holds the connection state by fitting the fitting convex portion 41a of the insertion side terminal 41 to the contact plate portion 42a formed in a plate shape. Is formed.
The two receiving-side terminals 42 are assembled in a connected state for easy assembly, and after assembly, the two receiving-side terminals 42 are cut by a broken line cutting portion 42d in the drawing.
One of the front end portions of the two receiving terminals 42 is connected to the contact portion 22 of the sensor portion 20 described above, and the other is connected to the conductor electrode 24 at one end portion of the resistor 25.
By connecting the connector connecting portion 35 on the sensor portion 20 side to the connector main body portion 34 on the base portion 30 side by the first connecting portion 40 constituted by the insertion side terminal 41 and the receiving side terminal 42 as described above, the sensor The part 20 to the outside of the base part 30 can be electrically connected. Moreover, the connection state of the insertion side terminal 41 and the receiving side terminal 42 is hold | maintained by the fitting convex part 41a and the fitting recessed part 42c.
In addition, although the insertion side terminal 41 was provided in the base part 30, and the receiving side terminal 42 was provided in the sensor part 20, you may make it arrange | position not only this but reversely. Further, the arrangement of the fitting convex portions and the fitting concave portions on the insertion side terminal 41 and the receiving side terminal 42 may be reversed.
　第２の接続部５０は、フック部(係合凸部)５１と、フック部(係合凸部)５１が係合される係止孔部（係合凹部）５２とで構成される。
　フック部５１は、２本設けられコネクタ連結部３５と一体に成形されており、外側に略直角状の係止段差部５１ａが設けられている。すなわち、第２の接続部５０のフック部５１は、例えば、図２に示すように、センサ部２０の外枠部３５ａの両側に配置されて基台部３０側に突き出すように配置され、係止段差部５１ａが外側に配置されている。
　係止孔部５２は、フック部５１の係止段差部５１ａが係止できる矩形の貫通孔部５２ａで構成されコネクタ本体部３４に一体に成形されている。すなわち、係止孔部５２は、例えば基台部３０の外枠部３４ａの側面部に形成した貫通孔部５２ａとして設けられている。
　これにより、２本のフック部５１の係止段差部５１ａを２つの係止孔部５２の貫通孔部５２ａに係止することで、機械的に接続することができる。　 The second connection portion 50 includes a hook portion (engagement convex portion) 51 and a locking hole portion (engagement concave portion) 52 with which the hook portion (engagement convex portion) 51 is engaged.
Two hook parts 51 are provided and formed integrally with the connector connecting part 35, and a substantially right-angled locking step part 51a is provided on the outer side. That is, for example, as shown in FIG. 2, the hook portion 51 of the second connection portion 50 is disposed on both sides of the outer frame portion 35 a of the sensor portion 20 so as to protrude toward the base portion 30 side. A stop step portion 51a is disposed outside.
The locking hole 52 is formed of a rectangular through hole 52 a that can lock the locking step 51 a of the hook 51, and is integrally formed with the connector main body 34. That is, the locking hole portion 52 is provided as a through-hole portion 52 a formed on the side surface portion of the outer frame portion 34 a of the base portion 30, for example.
As a result, the locking stepped portions 51 a of the two hook portions 51 are locked to the through-hole portions 52 a of the two locking hole portions 52, so that they can be mechanically connected.
　このように構成した被検出ユニット１００によれば、センサ部２０と基台部３０とを別体し、第１の接続部４０で電気的に接続するとともに、第２の接続部５０で機械的に接続することで、被検出ユニット１００を構成することができる。
　これにより、被検出ユニット１００の出力用コネクタ３６に検出信号を導出するハーネスを接続する場合などの組立時に外力が加わることになっても、センサ部２０と基台部３０とが別体であって第１の接続部４０と第２の接続部５０とで接続されていることからそれぞれの接続部４０，５０に遊びがあり、この遊びによって外力の影響を緩和することができ、可動体１０によるセンサ部２０の接点部２２の位置ずれなどを防止でき、精度よく検出することができる。 According to the detected unit 100 configured as described above, the sensor unit 20 and the base unit 30 are separated and electrically connected by the first connection unit 40 and mechanically by the second connection unit 50. By connecting to, the detected unit 100 can be configured.
Thus, even when an external force is applied during assembly such as when a harness for deriving a detection signal is connected to the output connector 36 of the detected unit 100, the sensor unit 20 and the base unit 30 are separate. Since the first connection portion 40 and the second connection portion 50 are connected to each other, there is play in each of the connection portions 40 and 50, and this play can alleviate the influence of external force. It is possible to prevent the displacement of the contact portion 22 of the sensor unit 20 due to the above, and to detect it with high accuracy.
　また、センサ部２０と基台部３０とを別体し、第１の接続部４０で電気的に接続するとともに、第２の接続部５０で機械的に接続することで、被検出ユニット１００を設置する燃料タンク２の開口部３の形状や出力用コネクタ３６の取り出し方向などが異なる場合には、基台部３０だけを用意するだけで簡単に対応することができる。
　すなわち、被検出ユニット１００は、図３に示すように、基台部３０の位置決め用の切り欠き部３３および出力用コネクタ３６の向きをコネクタ本体部３４の向きに対し、９０度反時計回りに回転させた状態としてあり、センサ部２０における可動体１０の回動方向を変えずに、基台部３０の位置決め用の切り欠き部３３および出力用コネクタ３６の向きを基台部３０だけで対応することができる。 In addition, the sensor unit 20 and the base unit 30 are separated and electrically connected by the first connection unit 40 and mechanically connected by the second connection unit 50, whereby the detected unit 100 is When the shape of the opening 3 of the fuel tank 2 to be installed, the take-out direction of the output connector 36, and the like are different, it can be easily dealt with by preparing only the base 30.
That is, as shown in FIG. 3, the detected unit 100 is configured to turn the positioning notch 33 and the output connector 36 of the base unit 30 counterclockwise by 90 degrees with respect to the direction of the connector main body 34. It is in a rotated state, and the orientation of the positioning notch 33 and the output connector 36 of the base unit 30 can be handled only by the base unit 30 without changing the rotational direction of the movable body 10 in the sensor unit 20. can do.
　なお、上記の実施の形態では、電気的に接続する第１の接続部４０と、機械的に接続する第２の接続部５０をそれぞれ設けて、構成したが、第１の接続部４０と第２の接続部５０とを１つの接続部４０（５０）で兼用するようにしても良い。例えば、第１の接続部４０の接続保持部を構成する嵌合凸部４１ａと嵌合凹部４２ｃとで、機械的な接続をできるようにする。
　また、第２の接続部５０のフック部５１と係止孔部５２との接続によって接触する端子部分を設けて電気的な接続をできるようにする。この場合には、１つのフック部５１の表裏面などを利用して複数の端子部分を設けて必要な総数の端子部分を設けるようにする。 In the above-described embodiment, the first connection part 40 to be electrically connected and the second connection part 50 to be mechanically connected are provided and configured. Two connecting portions 50 may be shared by one connecting portion 40 (50). For example, mechanical connection is made possible by the fitting convex part 41a and the fitting concave part 42c constituting the connection holding part of the first connection part 40.
In addition, a terminal portion that comes into contact by connection between the hook portion 51 and the locking hole portion 52 of the second connection portion 50 is provided so that electrical connection can be made. In this case, a plurality of terminal portions are provided using the front and back surfaces of one hook portion 51, and the necessary total number of terminal portions is provided.
　次に、本発明の（移動センサ用の）被検出ユニット１００を備える液面検出装置１は、移動センサ用の被検出ユニット１００を備え、例えば図１に示すように、被検出体を燃料タンク２の液面とし、可動体１０には、液面の変動に伴って変位するフロート６０がアーム６１を介して連結され、フロート６０の変位に可動体１０が応動するように構成してある。
　液面検出装置１は、例えば、ガソリンなどの液体燃料を貯留する燃料タンク２の上面の開口部３に基台部３０が設置され、燃料タンク２の内部にセンサ部２０を配置する。センサ部２０は、液位に応じて液体中に浮くフロート６０の上下動（変位）を被検出ユニット１００を構成する可動体１０にアーム６１を介して伝達する。可動体１０のセンサ部２０には、既に説明したように、検出部２１を構成する接点部２２が設けられ、センサ部２０に固定された絶縁基板２３に導体電極２４および抵抗体２５が形成され、導体電極２４上を接点部２２が摺動する。この接点部２２の接触位置によって導体電極２４を介して接続される抵抗体２５の一端部から接点部２２までの電気抵抗が変化する。
　これにより、液面検出装置１は、フロート６０の変位によるセンサ部２０の可動体１０の応動で、検出部２１の接点部２２と導体電極２４の接触位置の変化に伴う抵抗体２５の電気抵抗変化から液面を電気的に検出する。 Next, the liquid level detection device 1 including the detection unit 100 (for movement sensor) of the present invention includes the detection unit 100 for movement sensor. For example, as shown in FIG. The movable body 10 is connected to a movable body 10 via an arm 61 that is displaced as the liquid level changes, so that the movable body 10 responds to the displacement of the float 60.
In the liquid level detection device 1, for example, a base portion 30 is installed in an opening 3 on the upper surface of a fuel tank 2 that stores liquid fuel such as gasoline, and a sensor unit 20 is disposed inside the fuel tank 2. The sensor unit 20 transmits the vertical movement (displacement) of the float 60 floating in the liquid according to the liquid level to the movable body 10 constituting the detected unit 100 via the arm 61. As described above, the sensor unit 20 of the movable body 10 is provided with the contact portion 22 constituting the detection unit 21, and the conductor electrode 24 and the resistor 25 are formed on the insulating substrate 23 fixed to the sensor unit 20. The contact portion 22 slides on the conductor electrode 24. The electrical resistance from one end of the resistor 25 connected through the conductor electrode 24 to the contact 22 changes depending on the contact position of the contact 22.
As a result, the liquid level detection device 1 causes the electric resistance of the resistor 25 to be changed in accordance with the change in the contact position of the contact portion 22 of the detection unit 21 and the conductor electrode 24 due to the response of the movable body 10 of the sensor unit 20 due to the displacement of the float 60. The liquid level is detected electrically from the change.
　このような液面検出装置１を、例えば車両に搭載する場合、基台部３０の出力用コネクタ３６に検出信号を導出するハーネスを接続する組立時に外力が加わることになるが、センサ部２０と基台部３０とが別体であって第１の接続部４０と第２の接続部５０とで接続され、それぞれの接続部４０，５０に遊びがあり、この遊びによって外力の影響を緩和することができ、可動体１０によるセンサ部２０の接点部２２の位置ずれなどを防止でき、精度よく液面を検出することができる。
　また、液面検出装置１を、例えば車両に搭載する場合、基台部３０の形状が燃料タンク２の開口部３の形状によって異なるため、車種ごとに基台部３０を変更しなければならないが、センサ部２０と基台部３０を分離できるので、基台部３０のみを新たに用意すれば良く、車種の変更に簡単に対応することができる。 When such a liquid level detection device 1 is mounted on a vehicle, for example, an external force is applied during assembly for connecting a harness for deriving a detection signal to the output connector 36 of the base unit 30. The base portion 30 is a separate body and is connected by the first connection portion 40 and the second connection portion 50, and there is play in each of the connection portions 40, 50, and this play alleviates the influence of external force. Therefore, it is possible to prevent the displacement of the contact portion 22 of the sensor unit 20 due to the movable body 10 and to detect the liquid level with high accuracy.
Further, when the liquid level detection device 1 is mounted on a vehicle, for example, the shape of the base portion 30 differs depending on the shape of the opening 3 of the fuel tank 2, so the base portion 30 must be changed for each vehicle type. Since the sensor unit 20 and the base unit 30 can be separated from each other, only the base unit 30 needs to be newly prepared, and the vehicle type can be easily changed.
　次に、被検出ユニットの他の実施の形態について図４により説明する。
　本実施の形態では、被検出ユニット１００Ａを、既に説明した摺動抵抗式に代えて無接点磁気式のセンサで構成している。すなわち、被検出ユニット１００Ａは、磁気センサでセンサ部２０Ａが構成され、センサ部２０Ａは、上記実施の形態で説明した共通の基台部３０に連結されて構成される。
　被検出ユニット１００Ａは、センサ部２０Ａが円柱状の磁石１１０と、磁石１１０の周囲を囲むホルダ１２０と、を備え、磁石１１０の中心軸１１０ａを中心に磁石１１０およびホルダ１２０が一体で回転することで磁気検出素子１３１に磁気変化を与えるように構成されている。 Next, another embodiment of the detected unit will be described with reference to FIG.
In the present embodiment, the detected unit 100A is configured by a contactless magnetic sensor instead of the already described sliding resistance type. That is, the detected unit 100A includes a sensor unit 20A that is a magnetic sensor, and the sensor unit 20A is configured to be connected to the common base unit 30 described in the above embodiment.
The detected unit 100A includes a sensor unit 20A including a columnar magnet 110 and a holder 120 surrounding the magnet 110, and the magnet 110 and the holder 120 rotate integrally around a central axis 110a of the magnet 110. The magnetic detection element 131 is configured to give a magnetic change.
　また、この被検出ユニット１００Ａを備える液面検出装置１Ａは、被検出ユニット１００Ａを備え、ホルダ１２０に、液面の変動に伴って変位するフロート１４０を連結して構成される。
　液面検出装置１Ａは、例えば、ガソリンなどの液体燃料を貯留する図示しない燃料タンク内にセンサ部２０Ａが設置され、液位に応じて液体中に浮くフロート１４０の上下動（変位）を被検出ユニット１００Ａの回動するホルダ１２０に伝達する。磁石１１０が取り付けられたホルダ１２０は、水平軸回りに回動可能に本体部１５０に支持される。本体部１５０には、磁石１１０の中心軸１１０ａと対向して磁気検出素子１３１を備えた磁気検出部１３０が設けられる。
　これにより、磁気検出部１３０の磁気検出素子１３１で、フロート１４０の変位によるホルダ１２０の回動に伴う磁石１１０の磁気変化を検出することで、液面を検出する。 Further, the liquid level detection apparatus 1A including the detected unit 100A includes the detected unit 100A, and is configured by connecting a float 140 that is displaced with a change in the liquid level to the holder 120.
In the liquid level detection device 1A, for example, a sensor unit 20A is installed in a fuel tank (not shown) that stores liquid fuel such as gasoline, and the vertical movement (displacement) of the float 140 that floats in the liquid according to the liquid level is detected. This is transmitted to the rotating holder 120 of the unit 100A. The holder 120 to which the magnet 110 is attached is supported by the main body 150 so as to be rotatable around a horizontal axis. The main body 150 is provided with a magnetic detection unit 130 including a magnetic detection element 131 facing the central axis 110 a of the magnet 110.
Thereby, the liquid level is detected by detecting the magnetic change of the magnet 110 accompanying the rotation of the holder 120 due to the displacement of the float 140 by the magnetic detection element 131 of the magnetic detection unit 130.
　磁石１１０は、円柱形状とされ、例えば、ネオジムやフェライト材料などからなり、磁石１１０の着磁は、ここでは、２極着磁である。磁石１１０は、周囲がホルダ１２０に囲まれる。磁石１１０は、ホルダ１２０に収納された状態で磁石１１０の中心軸１１０ａを中心にホルダ１２０と一体に回動される。また、磁石１１０は、ホルダ１２０と結合させるため少なくとも一方の端面１１１、図示例では、表側の端面１１１ａに保持用凹部１１３が形成されている。保持用凹部１１３は、磁石１１０に対するホルダ１２０の回転方向の接線に対し、直交した方向に設けられており、ここでは、磁石１１０の中心軸１１０ａを通る半径方向に形成してある。磁石１１０の保持用凹部１１３は、ホルダ１２０のインサート成形の際に樹脂が入ることで嵌合する凸状部１２４が形成され磁石１１０とホルダ１２０との回り止め機能を果たしている。
　なお、保持用凹部１１３は、磁石１１０の端面１１１の一直線上に形成したが、一直線上で分断して複数形成したり、直線上でない位置に複数形成しても良く、ホルダ１２０と磁石１１０との回り止めができれば良い。
　また、保持用凹部１１３は、磁石１１０の表側の端面１１１ａに設ける場合に限らず、裏側の端面１１１ｂに設けたり、表裏両側の端面１１１に設けるようにしても良い。 The magnet 110 has a cylindrical shape, and is made of, for example, neodymium or a ferrite material, and the magnet 110 is magnetized in this case with two poles. The periphery of the magnet 110 is surrounded by the holder 120. The magnet 110 is rotated integrally with the holder 120 about the central axis 110 a of the magnet 110 while being accommodated in the holder 120. Further, the magnet 110 has a holding recess 113 formed on at least one end surface 111, in the illustrated example, the end surface 111 a on the front side for coupling with the holder 120. The holding recess 113 is provided in a direction orthogonal to the tangent to the magnet 110 in the rotation direction of the holder 120, and here, is formed in a radial direction passing through the central axis 110 a of the magnet 110. The holding recess 113 of the magnet 110 is formed with a protruding portion 124 that is fitted when resin is inserted during insert molding of the holder 120, and functions to prevent the magnet 110 and the holder 120 from rotating.
The holding recess 113 is formed on a straight line of the end surface 111 of the magnet 110. However, the holding recess 113 may be formed by dividing on a straight line, or may be formed at a position not on the straight line. I just want to be able to prevent rotation.
The holding recess 113 is not limited to being provided on the front side end surface 111a of the magnet 110, but may be provided on the back side end surface 111b or on the front and back side end surfaces 111.
　ホルダ１２０は、ポリアセタールなどの樹脂材料からなり、磁石１１０がインサート成形によって周囲が囲まれて固定されている。
　ホルダ１２０は、磁石１１０の側周面１１２を囲んで保持する円筒状の円筒部１２０ａと、円筒部１２０ａの両端（表裏側）を塞ぐ端面１２０ｂ，１２０ｃとで一体に構成されている。
　ホルダ１２０には、裏側の端面１２０ｃに、中心部に貫通する孔状の回動軸受部１２５が形成される。回動軸受部１２５は、内周面が、本体部１５０の円柱状の回動軸部１５３の外周面と摺接して回動可能に支持される。磁石１１０は、孔状の回動軸受部１２５によって磁石１１０の裏側の一部がホルダ１２０から露出している。
　ホルダ１２０には、表側の端面１２０ｂに円筒状の回動軸部１２６が表側に突き出すように一体に形成される。回動軸部１２６は、外周面が、本体部１５０の表側を覆うカバー１６０の回動軸受部１６１の内周面と摺接して回動可能に支持される。
　これにより、磁石１１０が取り付けられたホルダ１２０は、裏側が回動軸受部１２５と本体部１５０の回動軸部１５３で支持され、表側が回動軸部１２６とカバー１６０の回動軸受部１６１で支持されることで、磁石１１０の中心軸１１０ａである水平軸回りに一直線上で回動可能に本体部１５０およびカバー１６０で支持される。　 The holder 120 is made of a resin material such as polyacetal, and the magnet 110 is surrounded and fixed by insert molding.
The holder 120 is integrally formed of a cylindrical cylindrical portion 120a that surrounds and holds the side peripheral surface 112 of the magnet 110, and end surfaces 120b and 120c that block both ends (front and back sides) of the cylindrical portion 120a.
The holder 120 is formed with a hole-shaped rotational bearing portion 125 penetrating through the center portion on the end surface 120c on the back side. The inner surface of the rotary bearing portion 125 is supported so as to be able to rotate in sliding contact with the outer peripheral surface of the columnar rotary shaft portion 153 of the main body portion 150. A portion of the magnet 110 on the back side of the magnet 110 is exposed from the holder 120 by a hole-shaped rotation bearing portion 125.
The holder 120 is integrally formed with a front end surface 120b so that a cylindrical rotation shaft portion 126 protrudes to the front side. The rotation shaft portion 126 is supported rotatably so that the outer peripheral surface is in sliding contact with the inner peripheral surface of the rotation bearing portion 161 of the cover 160 that covers the front side of the main body portion 150.
As a result, the holder 120 to which the magnet 110 is attached is supported on the back side by the rotary bearing part 125 and the rotary shaft part 153 of the main body part 150, and on the front side by the rotary shaft part 126 and the rotary bearing part 161 of the cover 160. Is supported by the main body 150 and the cover 160 so as to be rotatable in a straight line around the horizontal axis that is the central axis 110a of the magnet 110.
　このように構成した被検出ユニット１００Ａは、ホルダ１２０を内蔵した磁石１１０の中心軸１１０ａを中心に回動可能に支持し、ホルダ１２０の磁石１１０が磁気検出部１３０の磁気検出素子１３１の磁気検出面に対向するように配置する。そして、ホルダ１２０の回動動作に伴う磁石１１０の磁気変化を磁気検出素子１３１で検出する。 The detected unit 100 </ b> A configured as described above supports the magnet 110 including the holder 120 so as to be rotatable about the central axis 110 a, and the magnet 110 of the holder 120 detects the magnetic detection of the magnetic detection element 131 of the magnetic detection unit 130. Arrange to face the surface. Then, the magnetic detection element 131 detects the magnetic change of the magnet 110 accompanying the rotation operation of the holder 120.
　本体部１５０には、表側の内部に磁気検出素子１３１を備える磁気検出部１３０が設けられる。磁気検出部１３０は、ホルダ１２０に収納された磁石１１０と対向して磁気検出素子１３１が配置され、ホルダ１２０の回動動作に伴う磁石１１０の磁気変化を磁気検出素子１３１によって検出する。磁気検出素子１３１は、例えば、ホールＩＣなどで構成される。
　磁気検出部１３０は、３つのリード端子１３２を備え、接地されるリード端子１３２ａと２つの電源供給や検出信号伝達のためのリード端子１３２ａで構成されており、本体部１５０に設けたコネクタ連結部３５の第１の接続部４０の３つの受け側端子４２に接続され、共通の基台部３０のコネクタ本体部３４の挿入側端子４１と接続することで電気的に接続される(図２参照）。
　なお、共通に使用する基台部３０には、図２に示したように、挿入側端子４１は、着脱されるそれぞれのセンサ部２０Ａ（２０）での最大必要数、例えば３本設けておき、使用するセンサ部２０Ａに応じて必要本数(３本）を使用し、センサ部２０では、２本のみを使用して残り(１本)は使用しないようにし、共通化を図る。
　また、本体部１５０のコネクタ連結部３５には、第２の接続部５０のフック部５１が設けられ、基台部３０のコネクタ本体部３４の係止孔部５２に係止することで機械的に連結される。
　これにより、センサ部２０Ａと、基台部３０とを第１の接続部４０および第２の接続部５０で連結接続することで、無接点磁気式のセンサ部２０Ａによる移動センサ用の被検出ユニット１００Ａとすることができる。 The main body 150 is provided with a magnetic detection unit 130 including a magnetic detection element 131 inside the front side. In the magnetism detection unit 130, the magnetism detection element 131 is arranged to face the magnet 110 accommodated in the holder 120, and the magnetism detection element 131 detects a magnetic change of the magnet 110 due to the rotation operation of the holder 120. The magnetic detection element 131 is composed of, for example, a Hall IC.
The magnetic detection unit 130 includes three lead terminals 132 and includes a lead terminal 132a to be grounded and two lead terminals 132a for supplying power and transmitting a detection signal. 35 is connected to the three receiving side terminals 42 of the first connecting portion 40 and is electrically connected by connecting to the insertion side terminal 41 of the connector main body portion 34 of the common base portion 30 (see FIG. 2). ).
In addition, as shown in FIG. 2, the insertion base terminal 41 is provided with the maximum necessary number, for example, three for each of the detachable sensor parts 20A (20), as shown in FIG. The required number (three) is used in accordance with the sensor unit 20A to be used, and the sensor unit 20 uses only two and does not use the remaining (one), thereby achieving commonality.
In addition, the connector connecting portion 35 of the main body 150 is provided with a hook portion 51 of the second connecting portion 50, and is mechanically engaged with the locking hole 52 of the connector main body 34 of the base portion 30. Connected to
As a result, the sensor unit 20A and the base unit 30 are connected and connected by the first connection unit 40 and the second connection unit 50, so that the detected unit for the movement sensor by the contactless magnetic sensor unit 20A. 100A.
　このような被検出ユニット１００Ａを用いた液面検出装置１Ａは、ホルダ１２０に、液面の変動に伴って変位するフロート１４０を連結して構成される。
　すなわち、ホルダ１２０には、中間部の外周にアーム保持部１２７が形成され、アーム保持部１２７に、液位に応じて上下動するフロート１４０に連結されたフロートアーム１４１が固定される。これにより、フロート１４０の上下動がフロートアーム１４１に伝達され、フロートアーム１４１を介してホルダ１２０が本体部１５０の回動軸部１５３と回動軸受部１６１を中心に回動される。 A liquid level detection apparatus 1A using such a detected unit 100A is configured by connecting a float 140 that is displaced with a change in the liquid level to a holder 120.
That is, the holder 120 is formed with an arm holding portion 127 on the outer periphery of the intermediate portion, and the float arm 141 connected to the float 140 that moves up and down according to the liquid level is fixed to the arm holding portion 127. Accordingly, the vertical movement of the float 140 is transmitted to the float arm 141, and the holder 120 is rotated about the rotation shaft portion 153 and the rotation bearing portion 161 of the main body 150 via the float arm 141.
　以上のように構成した被検出ユニット１００Ａによれば、センサ部２０Ａと基台部３０とを別体し、第１の接続部４０で電気的に接続するとともに、第２の接続部５０で機械的に接続することで、被検出ユニット１００Ａを構成することができる。
　これにより、被検出ユニット１００Ａの出力用コネクタ３６（図１参照）に検出信号を導出するハーネスを接続する場合などの組立時に外力が加わることになっても、センサ部２０Ａと基台部３０とが別体であって第１の接続部４０と第２の接続部５０とで接続されていることからそれぞれの接続部４０，５０に遊びがあり、この遊びによって外力の影響を緩和することができ、センサ部２０Ａの磁石１１０に対する磁気検出素子１３１の位置ずれなどを防止でき、精度よく検出することができる。 According to the detected unit 100A configured as described above, the sensor unit 20A and the base unit 30 are separated and electrically connected by the first connection unit 40, and the machine by the second connection unit 50. Thus, the detected unit 100A can be configured.
Thus, even if an external force is applied during assembly such as when a harness for deriving a detection signal is connected to the output connector 36 (see FIG. 1) of the detected unit 100A, the sensor unit 20A and the base unit 30 Are separate bodies and are connected by the first connection portion 40 and the second connection portion 50, so there is play in each connection portion 40, 50, and this play can alleviate the influence of external force. In addition, it is possible to prevent positional deviation of the magnetic detection element 131 with respect to the magnet 110 of the sensor unit 20A, and to detect with high accuracy.
　また、センサ部２０Ａと基台部３０とを別体し、第１の接続部４０で電気的に接続するとともに、第２の接続部５０で機械的に接続することで、被検出ユニット１００Ａを設置する燃料タンク２の開口部３の形状や出力用コネクタ３６の取り出し方向などが異なる場合には、基台部３０だけを用意するだけで簡単に対応することができる。さらに、センサ部２０とセンサ部２０Ａとの仕様の変更も簡単に対応することができる。 Further, the sensor unit 20A and the base unit 30 are separated and electrically connected by the first connection unit 40 and mechanically connected by the second connection unit 50, whereby the detected unit 100A is When the shape of the opening 3 of the fuel tank 2 to be installed, the take-out direction of the output connector 36, and the like are different, it can be easily dealt with by preparing only the base 30. Furthermore, changes in specifications between the sensor unit 20 and the sensor unit 20A can be easily handled.
　また、液面検出装置１Ａを、例えば車両に搭載する場合、基台部３０の出力用コネクタ３６に検出信号を導出するハーネスを接続する組立時に外力が加わることになるが、センサ部２０Ａと基台部３０とが別体であって第１の接続部４０と第２の接続部５０とで接続され、それぞれの接続部４０，５０に遊びがあり、この遊びによって外力の影響を緩和することができ、センサ部２０Ａの磁石１１０に対する磁気検出素子１３１の位置ずれなどを防止でき、精度よく検出することができる。
　また、液面検出装置１Ａを、例えば車両に搭載する場合、基台部３０の形状が燃料タンク２の開口部３の形状によって異なるため、車種ごとに基台部３０を変更しなければならないが、センサ部２０Ａと基台部３０を分離できるので、基台部３０のみを新たに用意すれば良く、車種の変更に簡単に対応することができる。さらに、センサ部２０とセンサ部２０Ａとの仕様の変更も簡単に対応することができる。 Further, when the liquid level detection device 1A is mounted on, for example, a vehicle, an external force is applied during assembly for connecting a harness for deriving a detection signal to the output connector 36 of the base unit 30. The base portion 30 is a separate body and is connected by the first connection portion 40 and the second connection portion 50, and there is play in each of the connection portions 40 and 50, and this play alleviates the influence of external force. Therefore, it is possible to prevent misalignment of the magnetic detection element 131 with respect to the magnet 110 of the sensor unit 20A, and to detect with high accuracy.
Further, when the liquid level detection device 1A is mounted on a vehicle, for example, the shape of the base portion 30 varies depending on the shape of the opening 3 of the fuel tank 2, and therefore the base portion 30 must be changed for each vehicle type. Since the sensor unit 20A and the base unit 30 can be separated, only the base unit 30 needs to be newly prepared, and it is possible to easily cope with a change in the vehicle type. Furthermore, changes in specifications between the sensor unit 20 and the sensor unit 20A can be easily handled.
　以上、実施の形態とともに具体的に説明したように、本発明の移動センサ用の被検出ユニット１００，１００Ａによれば、被検出体の移動に追従して動作する可動体１０と、可動体１０の動作に応じて検出部２１に電気信号の変化を与えるセンサ部２０，２０Ａと、センサ部２０，２０Ａと別体に形成されセンサ部２０，２０Ａを被検出体の移動を検出する検出位置に設置しセンサ部２０，２０Ａからの電気信号を外部に導出する基台部３０とを有し、センサ部２０，２０Ａと基台部３０には、センサ部２０，２０Ａからの電気信号を基台部３０の外部に導出する電気的な接続を行う第１の接続部４０と、センサ部２０，２０Ａと基台部３０との機械的な接続を行う第２の接続部５０と、を備えて構成したので、センサ部２０，２０Ａと基台部３０とを別体し、第１の接続部４０で電気的に接続するとともに、第２の接続部５０で機械的に接続することで、被検出ユニット１００，１００Ａを構成することができる。
　また、被検出ユニット１００，１００Ａの出力用コネクタ３６に検出信号を導出するハーネスを接続する場合などの組立時に外力が加わることになっても、センサ部２０，２０Ａと基台部３０とが別体であって第１の接続部４０と第２の接続部５０とで接続されていることからそれぞれの接続部４０，５０に遊びがあり、この遊びによって外力の影響を緩和することができ、可動体１０によるセンサ部２０，２０Ａの接点部２２の位置ずれなどを防止でき、精度よく検出することができる。
　また、センサ部２０，２０Ａと基台部３０とを別体し、第１の接続部４０で電気的に接続するとともに、第２の接続部５０で機械的に接続することで、被検出ユニット１００，１００Ａを設置する燃料タンク２の開口部３の形状や出力用コネクタ３６の取り出し方向などが異なる場合には、基台部３０だけを用意するだけで簡単に対応することができる。さらに、センサ部２０とセンサ部２０Ａとの仕様の変更も簡単に対応することができる。 As described above in detail with the embodiment, according to the detected units 100 and 100A for the movement sensor of the present invention, the movable body 10 that operates following the movement of the detected body, and the movable body 10 The sensor units 20 and 20A that change the electrical signal to the detection unit 21 according to the operation of the sensor unit 20 and the sensor units 20 and 20A are formed separately from the sensor units 20 and 20A. And a base part 30 for deriving electrical signals from the sensor parts 20 and 20A to the outside. The sensor parts 20 and 20A and the base part 30 are provided with electrical signals from the sensor parts 20 and 20A. A first connecting part 40 for making an electrical connection to the outside of the part 30, and a second connecting part 50 for making a mechanical connection between the sensor parts 20, 20A and the base part 30. Because it is configured, the sensor unit 20, 20A and the base And 30 to separate from, as well as electrically connected with the first connecting portion 40, by mechanically connecting the second connecting portion 50 can be configured to be detected unit 100, 100A.
Even when an external force is applied during assembly such as when a harness for deriving a detection signal is connected to the output connector 36 of the detected units 100 and 100A, the sensor units 20 and 20A and the base unit 30 are separated. Since it is a body and is connected by the first connection part 40 and the second connection part 50, there is play in each connection part 40, 50, and the influence of external force can be reduced by this play, The positional deviation of the contact part 22 of the sensor parts 20 and 20A by the movable body 10 can be prevented and can be detected with high accuracy.
In addition, the sensor units 20, 20 </ b> A and the base unit 30 are separated and electrically connected by the first connection unit 40 and mechanically connected by the second connection unit 50. When the shape of the opening 3 of the fuel tank 2 in which the 100 and 100A are installed, the take-out direction of the output connector 36, and the like are different, it can be easily dealt with by preparing only the base 30. Furthermore, changes in specifications between the sensor unit 20 and the sensor unit 20A can be easily handled.
　本発明の移動センサ用の被検出ユニット１００，１００Ａによれば、第１の接続部４０は、センサ部２０，２０Ａと基台部３０とのいずれか一方が挿入側端子（挿入側接続部）４１で構成され、いずれか他方が、挿入側端子が接続される受け側端子(受け側接続部）４２で構成され、挿入側端子４１と受け側端子４２には、互いの接続状態を保持する接続保持部４１ａ，４２ｃを備えているので、挿入側接続部４１と受け側接続部４２とで簡単に接続することができるとともに、接続状態を接続保持部４１ａ，４２ｃで保持することができ、確実に電気的に接続することができる。 According to the detected units 100 and 100A for the movement sensor of the present invention, the first connection part 40 has either one of the sensor parts 20 and 20A and the base part 30 as an insertion side terminal (insertion side connection part). 41, one of which is constituted by a receiving terminal (receiving side connecting portion) 42 to which the insertion side terminal is connected, and the insertion side terminal 41 and the receiving side terminal 42 hold the mutual connection state. Since the connection holding portions 41a and 42c are provided, the insertion side connection portion 41 and the receiving side connection portion 42 can be easily connected and the connection state can be held by the connection holding portions 41a and 42c. An electrical connection can be made reliably.
　本発明の移動センサ用の被検出ユニット１００，１００Ａによれば、第２の接続部５０は、センサ部２０，２０Ａと基台部３０とのいずれか一方がフック部（係合凸部）５１で構成され、いずれか他方が係止孔部（係合凹部）５２で構成されているので、係合凸部５１と係合凹部５２との係合で、簡単に機械的な接続をすることができる。 According to the detected units 100 and 100A for the movement sensor of the present invention, the second connecting portion 50 has either one of the sensor portions 20 and 20A or the base portion 30 as a hook portion (engagement convex portion) 51. Since either one of the other is formed by a locking hole (engagement recess) 52, the mechanical connection can be easily established by the engagement between the engagement protrusion 51 and the engagement recess 52. Can do.
　本発明の移動センサ用の被検出ユニット１００，１００Ａによれば、第１の接続部４０と第２の接続部５０は、兼用され、いずれか一方だけで電気的な接続および機械的な接続を行うようにすることで、一層簡単に電気的な接続と機械的な接続を行うことができる。 According to the detected units 100 and 100A for the movement sensor of the present invention, the first connection portion 40 and the second connection portion 50 are also used, and electrical connection and mechanical connection can be performed only by either one. By doing so, electrical connection and mechanical connection can be more easily performed.
　本発明の移動センサ用の被検出ユニットを備えた液面検出装置１，１Ａによれば、移動センサ用の被検出ユニット１００，１００Ａを備え、被検出体を液面とし、可動体１０に、液面の変動に伴って変位するフロート６０を連結することで、フロート６０の変位によって液面の変動を検出することができる。
　また、例えば車両に搭載する場合、基台部３０の出力用コネクタ３６に検出信号を導出するハーネスを接続する組立時に外力が加わることになるが、センサ部２０，２０Ａと基台部３０とが別体であって第１の接続部４０と第２の接続部５０とで接続され、それぞれの接続部４０，５０に遊びがあり、この遊びによって外力の影響を緩和することができ、センサ部２０，２０Ａで位置ずれなどを防止でき、精度よく検出することができる。
　また、液面検出装置１，１Ａを、例えば車両に搭載する場合、基台部３０の形状が燃料タンク２の開口部３の形状によって異なるため、車種ごとに基台部３０を変更しなければならないが、センサ部２０，２０Ａと基台部３０を分離できるので、基台部３０のみを新たに用意すれば良く、車種の変更に簡単に対応することができる。さらに、センサ部２０とセンサ部２０Ａとの仕様の変更も簡単に対応することができる。 According to the liquid level detection device 1, 1A including the detection unit for the movement sensor of the present invention, the detection unit 100, 100A for the movement sensor is provided, the detection target is the liquid level, By connecting the float 60 that is displaced along with the change in the liquid level, the change in the liquid level can be detected by the displacement of the float 60.
For example, when mounted on a vehicle, an external force is applied during assembly for connecting a harness for deriving a detection signal to the output connector 36 of the base unit 30. However, the sensor units 20 and 20A and the base unit 30 are connected to each other. It is a separate body and is connected by the first connection portion 40 and the second connection portion 50, and there is play in each connection portion 40, 50. By this play, the influence of external force can be reduced, and the sensor portion 20, 20A can prevent misalignment and can be detected with high accuracy.
Further, when the liquid level detection devices 1 and 1A are mounted on a vehicle, for example, the shape of the base portion 30 differs depending on the shape of the opening 3 of the fuel tank 2, so the base portion 30 must be changed for each vehicle type. However, since the sensor units 20 and 20A and the base unit 30 can be separated, only the base unit 30 needs to be newly prepared, and it is possible to easily cope with a change in the vehicle type. Furthermore, changes in specifications between the sensor unit 20 and the sensor unit 20A can be easily handled.
　以上の説明は、本発明を例示するものであって、その要旨を逸脱しない範囲で種々の変更、変形が可能であることは言うまでもない。 The above description exemplifies the present invention, and it goes without saying that various changes and modifications can be made without departing from the scope of the invention.
１　　　　液面検出装置
１Ａ　　　液面検出装置
２　　　　燃料タンク
３　　　　開口部
１００　　被検出ユニット（移動センサ用の被検出ユニット）
１００Ａ　被検出ユニット（移動センサ用の被検出ユニット）
１０　　　可動体
１１　　　回動アーム
１２　　　軸部
１３　　　軸受部
２０　　　センサ部
２０Ａ　　センサ部
２１　　　検出部
２２　　　接点部
２３　　　絶縁基板
２４　　　導体電極
２５　　　抵抗体
３０　　　基台部
３１　　　蓋板部
３２　　　つば部
３３　　　切り欠き部
３４　　　コネクタ本体部
３４ａ　　外枠部
３５　　　コネクタ連結部
３５ａ　　外枠部
３６　　　出力用コネクタ
４０　　　第１の接続部
４１　　　挿入側端子（挿入側接続部）
４１ａ　　嵌合凸部（接続保持部）
４２　　　受け側端子（受け側接続部）
４２ａ　　接触板部
４２ｂ　　係止曲部
４２ｃ　　嵌合凹部（接続保持部）
４２ｄ　　切断部
５０　　　第２の接続部
５１　　　フック部（係合凸部）
５１ａ　　係止段差部
５２　　　係止孔部（係合凹部）
５２ａ　　貫通孔部
６０　　　フロート
６１　　　アーム
１１０　　磁石
１１０ａ　中心軸
１１１　　端面
１１１ａ　表側の端面
１１１ｂ　裏側の端面
１１２　　側周面
１１３　　保持用凹部
１２０　　ホルダ
１２０ａ　円筒部
１２０ｂ　表側の端面
１２０ｃ　裏側の端面
１２４　　凸状部
１２５　　回動軸受部
１２６　　回動軸部
１２７　　アーム保持部
１３０　　磁気検出部
１３１　　磁気検出素子
１３２　　リード端子
１３２ａ　リード端子
１４０　　フロート
１４１　　フロートアーム
１５０　　本体部
１５３　　回動軸部
１６０　　カバー
１６１　　回動軸受部 DESCRIPTION OF SYMBOLS 1 Liquid level detection apparatus 1A Liquid level detection apparatus 2 Fuel tank 3 Opening part 100 Detected unit (detected unit for movement sensor)
100A Detected unit (Detected unit for movement sensor)
DESCRIPTION OF SYMBOLS 10 Movable body 11 Rotating arm 12 Shaft part 13 Bearing part 20 Sensor part 20A Sensor part 21 Detection part 22 Contact part 23 Insulating substrate 24 Conductor electrode 25 Resistor 30 Base part 31 Cover plate part 32 Collar part 33 Notch part 34 Connector body portion 34a Outer frame portion 35 Connector connection portion 35a Outer frame portion 36 Output connector 40 First connection portion 41 Insertion side terminal (insertion side connection portion)
41a Fitting convex part (connection holding part)
42 Receiving side terminal (receiving side connection)
42a Contact plate part 42b Locking curved part 42c Fitting recess (connection holding part)
42d cutting part 50 2nd connection part 51 hook part (engagement convex part)
51a Locking step 52 Locking hole (engagement recess)
52a Through-hole portion 60 Float 61 Arm 110 Magnet 110a Center shaft 111 End surface 111a Front side end surface 111b Back side end surface 112 Side peripheral surface 113 Holding recess 120 Holder 120a Cylindrical portion 120b Front side end surface 120c Back side end surface 124 Convex portion 125 times Dynamic bearing portion 126 Rotating shaft portion 127 Arm holding portion 130 Magnetic detecting portion 131 Magnetic detecting element 132 Lead terminal 132a Lead terminal 140 Float 141 Float arm 150 Body portion 153 Rotating shaft portion 160 Cover 161 Rotating bearing portion

Claims (5)

  1. 　被検出体の移動に追従して動作する可動体と、
    　前記可動体の動作に応じて検出部に電気信号の変化を与えるセンサ部と、
    　前記センサ部と別体に形成され前記センサ部を前記被検出体の移動を検出する検出位置に設置し前記センサ部からの電気信号を外部に導出する基台部とを有し、
    　前記センサ部と前記基台部には、前記センサ部からの電気信号を前記基台部の外部に導出する電気的な接続を行う第１の接続部と、前記センサ部と前記基台部との機械的な接続を行う第２の接続部と、を備える、
    　ことを特徴とする移動センサ用の被検出ユニット。     A movable body that operates following the movement of the detected body;
    A sensor unit that gives a change in an electrical signal to the detection unit in accordance with the operation of the movable body;
    A base part that is formed separately from the sensor part and is installed at a detection position for detecting the movement of the detected object and that derives an electrical signal from the sensor part to the outside;
    The sensor unit and the base unit include a first connection unit that performs an electrical connection for deriving an electrical signal from the sensor unit to the outside of the base unit, and the sensor unit and the base unit. A second connecting part for performing the mechanical connection of
    A detected unit for a movement sensor.
  2. 　前記第１の接続部は、前記センサ部と前記基台部とのいずれか一方が挿入側接続部で構成され、いずれか他方が前記挿入側接続部と接続される受け側接続部で構成され、
    　前記挿入側接続部と前記受け側接続部には、互いの接続状態を保持する接続保持部を備える、
    　ことを特徴とする請求項１に記載の移動センサ用の被検出ユニット。     The first connection part is constituted by an insertion side connection part in which one of the sensor part and the base part is constituted, and is constituted by a receiving side connection part connected to the insertion side connection part. ,
    The insertion-side connection portion and the receiving-side connection portion include a connection holding portion that holds the connection state between each other.
    The detected unit for a movement sensor according to claim 1.
  3. 　前記第２の接続部は、前記センサ部と前記基台部とのいずれか一方が係合凸部で構成され、いずれか他方が係合凹部で構成される、
    　ことを特徴とする請求項１または２に記載の移動センサ用の被検出ユニット。     In the second connection part, one of the sensor part and the base part is configured by an engaging convex part, and the other is configured by an engaging concave part.
    The unit to be detected for a movement sensor according to claim 1 or 2.
  4. 　前記第１の接続部と前記第２の接続部は、兼用され、いずれか一方だけで電気的な接続および機械的な接続を行う、
    　ことを特徴とする請求項１～３のいずれかに記載の移動センサ用の被検出ユニット。     The first connection part and the second connection part are combined, and electrical connection and mechanical connection are performed only by either one of them.
    The unit to be detected for a movement sensor according to any one of claims 1 to 3.
  5. 　請求項１～４のいずれかに記載の移動センサ用の被検出ユニットを備え、
    　前記被検出体を液面とし、
    　前記可動体に、前記液面の変動に伴って変位するフロートを連結した、
    　ことを特徴とする移動センサの被検出ユニットを備えた液面検出装置。     A detection unit for the movement sensor according to any one of claims 1 to 4,
    The detected body is a liquid level,
    Connected to the movable body is a float that is displaced as the liquid level fluctuates.
    A liquid level detection apparatus comprising a detected unit of a movement sensor.
PCT/JP2017/037148 2016-10-21 2017-10-13 Detected unit for movement sensor, and liquid level detecting device provided with same WO2018074352A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016206918 2016-10-21
JP2016-206918 2016-10-21

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009028359A1 (en) * 2007-08-31 2009-03-05 Nippon Seiki Co., Ltd. Liquid surface detection device
US20090158843A1 (en) * 2007-12-20 2009-06-25 Medallion Instrumentation Systems Llc Fluid level sender assembly and method of making a fluid level sender assembly
US20130180328A1 (en) * 2012-01-17 2013-07-18 Rochester Gauges, Inc. Liquid Level Transducer with Isolated Sensors
JP2014010008A (en) * 2012-06-28 2014-01-20 Nippon Seiki Co Ltd Liquid level detection device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009028359A1 (en) * 2007-08-31 2009-03-05 Nippon Seiki Co., Ltd. Liquid surface detection device
US20090158843A1 (en) * 2007-12-20 2009-06-25 Medallion Instrumentation Systems Llc Fluid level sender assembly and method of making a fluid level sender assembly
US20130180328A1 (en) * 2012-01-17 2013-07-18 Rochester Gauges, Inc. Liquid Level Transducer with Isolated Sensors
JP2014010008A (en) * 2012-06-28 2014-01-20 Nippon Seiki Co Ltd Liquid level detection device

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