JPH01181829A - Sucking tube for vacuum cleaner - Google Patents

Abstract

PURPOSE:To prevent an electric shock, the short-circuit of a heteropolar terminal and the damage of the terminal by fitting a protruding piece to a concave part before the fitting completion of a fitting concave part and a fitting convex part, and before a power receiving side protruding terminal having externally projecting tip side is brought into contact with a feeding side protruding terminal, when two sucking tube main bodies are connected. CONSTITUTION:A power receiving side protruding terminal 36 on a fitting convex part 25 side inserted to a through hole 34 on a fitting concave part 24 side, and brought into contact with a feeding side terminal 33, and high voltage electric wires 32 in both extension tube 21 are electrically connected. An engaging part 43 of a clamp 41 on the fitting concave part 24 side engages with an engaged part 48 on the fitting convex part 25 side, the both extension tubes 21 are locked, and a level difference surface 27 on the fitting convex part 25 side abuts on the edge surface of the extension tube 21. Protruding piece 51 on the fitting concave part 24 side fits into a concave part 52 of a fitting convex part, whereas, since a fitting length A is longer than an electrical connecting length B between the feeding side terminal 33 and the power receiving side protruding terminal 36, before the feeding side terminal 33 is brought into contact with the power receiving side protruding terminal 36, the protruding piece 51 of the power receiving side protruding terminal 36 fit into the concave part 52. In a contact condition, a gap does not exist between the terminals of a cover body 26 of the both extension tubes 21 of the power receiving side terminal 36.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides an extension tube incorporating a high-voltage electric wire for powering a rotating brush drive electric motor built into a suction port body. The present invention relates to a suction pipe of a vacuum cleaner such as a vacuum cleaner, and particularly relates to the structure of a removable electrical connection part that relays a high-voltage electric wire.

(Prior Art) Recently, with the spread of carpets in general households, there has been a demand for improved carpet cleaning tools, and suction ports equipped with rotating brushes driven by electric motors have come to be used. The electric motor of this suction port has 100
■Since a power source is required, conventionally, a high-voltage electric wire for power supply inside the vacuum cleaner body and a hose that is removably connected to the vacuum cleaner body are installed through an outlet installed in the vacuum cleaner body. and a high voltage electric wire consisting of a normal power cord is held along the outside of the extension tube which is detachably interposed between the vacuum cleaner body and the suction port body,
Both ends of this high-voltage electric wire are removably connected to the electric wire inside the hose and the high-voltage electric wire provided in the suction port body, respectively,
Electricity inside the suction port body! A structure was adopted in which power was supplied to the lJ1m from the vacuum cleaner itself. However, with this conventional structure, the ease of attaching and detaching the hose, extension tube, and suction port body is poor, so the following two types of extension tubes with built-in electric wires have come to be used.

One is to construct the entire or part of the extension tube body into a double layer, with an air flow path formed inside and a tapered tube for fitting and connection fixed to both ends, so that the inner tube part and the outer tube part are separated. It has a structure in which a power supply terminal connected to the wire and a pin-shaped power receiving terminal each covered by a cylindrical sleeve body are provided at both ends. . In this structure, since the pin-shaped power receiving terminal is covered by the sleeve body, and the power feeding terminal is of course provided so as not to be exposed, power is supplied before the extension tubes are connected to each other. Even if the side terminal and the power receiving side terminal are in contact, there is no risk of the human body coming into direct contact with the high-voltage part, so safety is high, but the heavy color becomes thicker, making it difficult to operate. Too bad.

The other method is to integrally mold an extension tube body with an air flow path inside and a tapered tube section for fitting connection by injection molding or the like, and form a wire storage section on one side of the outer peripheral surface of the extension side body. death,
A power supply side terminal and a pin-shaped power reception side terminal are connected to both ends of the electric wire stored in this housing, and locking devices are provided at both ends, and these electric wires, terminals, and locking devices are covered. It is covered by a cover body, and has a structure in which the tip side of the pin-shaped power receiving side terminal protrudes outward from the cover body. With this structure, the extension tube main body and the tapered tube section can be integrally molded, making it relatively lightweight and
Although it has excellent manufacturability, a certain amount of contact length is required between the power supply side terminal and the power reception side terminal, so it is difficult to connect the extension tubes to each other, the extension tube to the hose, or the extension tube to the suction port body. Before the connection is completed, when there is a gap between the contact surfaces of the extension tubes, that is, the end surfaces of the cover body, the pin-shaped power receiving terminal and the power feeding terminal, whose tips are exposed, come into contact. There is a risk of electric shock, short circuit, etc.

Furthermore, since the power receiving terminal is exposed, there are problems in terms of strength, such as being easily damaged by external pressure.

(Problems to be Solved by the Invention) As mentioned above, although the suction pipe of a conventional vacuum cleaner with an exposed pin-shaped power receiving terminal, such as an extension pipe, has a simple structure, the extension pipes are connected together. When doing so, the receiving terminal comes into contact with the power supplying terminal before the connection is complete, that is, while the receiving terminal is still slightly exposed, which poses a risk of electric shock or short circuit. Additionally, because the power receiving terminals are exposed, they are easily damaged when not connected.

The present invention aims to solve these problems, and provides a vacuum cleaner suction pipe with a built-in electric wire that is simple in structure, easy to manufacture, and free from the risk of electric shock or short circuit when connected. The purpose is to Another object of the present invention is to provide a suction pipe for a vacuum cleaner that can prevent damage to exposed power receiving terminals.

[Structure of the invention]

(Means for Solving the Problems) A suction pipe of a vacuum cleaner according to the present invention has an air flow path inside, and a tapered fitting recess and a tapered fitting protrusion that are removably fitted to each other. a plurality of approximately cylindrical suction pipe bodies provided at the end thereof; a cover body attached to the outer peripheral side of the suction pipe main body; and a cover body provided on the outer peripheral side of the fitting recess of the suction pipe body; A clamp having an engaging part that is removably engaged with an engaged part provided on the outer circumferential side of the fitting convex part of the suction pipe main body, and a plurality of clamps provided between the suction pipe main body and the cover body. A plurality of power supply side terminals provided between the high voltage electric wire, the fitting recess of the suction pipe body and the cover body and connected to the high voltage electric wire, and the tip end between the fitting convex part of the suction pipe body and the cover body. The suction pipe is provided with a plurality of pin-shaped protruding terminals on the power receiving side that are provided with the sides protruding outward and are connected to the high-voltage electric wire and that are in contact with the protruding terminals on the power receiving side so as to be able to freely come into contact with and separate from the power receiving side protruding terminals. A projecting piece located on the outer peripheral side of the power receiving side projecting terminal is provided on either one of the fitting recess side and the fitting convex side of the main body or cover body, for example, and the projecting piece is provided on the other side. further provided with a recess into which the fitting recess and the fitting protrusion are fitted, and further, the fitting recess and the fitting protrusion from the start of fitting between the protruding piece and the recess when the fitting recess and the fitting protrusion are fitted. The length of movement from the start of contact between the power feeding side terminal and the power receiving side projecting terminal to the completion of fitting between the fitting recess and the fitting convex portion is made larger than the movement length from the start of contact between the power feeding side terminal and the power receiving side projecting terminal to the completion of fitting between the fitting concave portion and the fitting convex portion.

Further, the projecting pieces are provided on the fitting convex portion side where the power receiving side projecting terminals are provided, and are positioned on the outer circumferential side of the power receiving side projecting terminals, and these power receiving side projecting terminals pass through both side edges of the projecting pieces and fit together. It may be located inside the plane that is in contact with the outer circumferential surface of the convex portion.

Furthermore, the clamp may be worn with a protruding piece.

(Function) In the suction pipe of the vacuum cleaner of the present invention, when connecting the suction pipe bodies, the tapered fitting convex portion at the end of one suction pipe body is connected to the tapered fitting convex portion at the end of the other suction pipe body. It fits into the fitting recess of the shape.

The protruding terminal on the power receiving side on the side of the fitting convex portion is brought into contact with the power feeding side terminal on the side of the fitting recess, and the cover body is provided between each suction pipe body and the cover body attached to the outer circumferential side of these suction pipe bodies. While the high-voltage electric wire is electrically connected, the engaging portion of the clamp on the fitting recess side is engaged with the engaged portion on the fitting protrusion side, and both suction pipe bodies are locked. At that time, the protruding piece provided on either one of the fitting recess and the fitting protrusion is fitted into the recess provided on the other, but the fitting between the fitting recess and the fitting protrusion Before completion and before the power-receiving-side protruding terminal whose tip side protrudes outward begins to come into contact with the power-feeding-side protruding terminal, the protruding piece positioned on the outer peripheral side of the power-receiving-side protruding terminal begins to fit into the recess.

Therefore, when the power receiving side protruding terminal and the power feeding side protruding terminal are in contact with each other, no gate II is formed on the outer circumferential side of the power receiving side protruding terminal, so that electric shock and short circuit of the different polarity terminals are prevented.

In addition, the circumferential position restriction by the protruding piece and the recess prevents damage to the terminals during connection, etc., and facilitates the connection work.

In addition, if the protruding piece is provided on the side of the fitting convex part where the protruding terminal on the power receiving side is located, even when the suction pipe body is not connected, the protruding piece always located on the outer circumferential side of the protruding terminal on the receiving side can be used to connect the protruding terminal on the receiving side. is protected. In particular, if the power-receiving protruding terminal is positioned inside the plane that passes through both side lines of the protruding piece and touches the outer peripheral surface of the fitting convex part, the linear edge of something will fit from the side edge of the protruding piece. Even if it hits the outer peripheral surface of the convex part, it will not hit the protruding terminal on the power receiving side.

Generally speaking, if the protruding piece is also used as a clamp, the structure will be simplified and it will be easier to make the protruding piece a different color from the cover body, etc., but if the protruding piece is colored differently like this, it will be easier to identify This makes the connection work easier.

(Embodiment) Hereinafter, the structure of a first embodiment of the suction pipe for a vacuum cleaner of the present invention will be described based on FIGS. 1 to 6.

First, the overall structure of the electric I1II remover will be explained with reference to FIG.

Reference numeral 1 denotes a vacuum cleaner body, and inside the vacuum cleaner body 1 there are an electric blower, a dust collection chamber communicating with the suction side of the electric blower, a control circuit for controlling the electric blower, a power cord that can be freely inserted and taken out, etc. (none of which are shown) are provided. Further, a connection port 2 is provided on the top surface of the vacuum cleaner main body 1, facing the dust collection chamber. Furthermore, although not shown, a receiving terminal electrically connected to the l1111 circuit and a power feeding terminal electrically connected to the power cord are provided near the connection port 2. There is.

Reference numeral 6 denotes a hose as a suction pipe, and the hose 6 includes a flexible hose body 7 in the form of a spiral bellows, and is provided at one end of the hose body 7 and is detachably inserted into the connection port 2 of the vacuum cleaner body 1. It consists of an insertion tube 8 to be connected and a grip tube 9 provided at the other end of the hose main body 7, and the grip tube 9 has a handle portion 10 formed therein and a cover body 11. It is attached to the upper side of the outer circumferential side in the figure, and an operation 111m section 12 is provided in the cover body 11 portion.

Although not shown, the plug-in tube 8 is provided with a transmitter terminal and a power receiver terminal, respectively, which are detachably connected to the receiver terminal and the power supply terminal of the vacuum cleaner main body 1, respectively. ing. The transmitting side terminal is connected to the Ila+ operating portion 12 via a piano wire that is spirally provided in the hose body 7 and maintains the shape of the hose body 7.
electrically connected to. Further, the power receiving side terminal is
A power supply side terminal provided at the tip of the grip tube 9 is connected to the high-voltage electric wire for power supply of the AC power supply provided in the hose body 7 along the piano wire and the control operation section 12. electrically connected to.

Reference numeral 16 denotes a suction port body, and this suction port body 16 has a suction port (not shown) formed as an opening on the lower surface, and a joint pipe 17 as a suction pipe communicating with the suction port, which is connected to the rear part. It is set up so that it can move freely. And, although not shown,
A rotary brush is rotatably supported in the suction port body 16 facing the suction port, and an electric motor for rotationally driving the rotary brush is provided. Further, a power receiving side terminal is provided at the tip of the joint pipe 17, and this power receiving side terminal is connected to the suction port body 16 via a high voltage electric wire arranged inside the joint pipe 17. electrically connected to the control circuit for the motor.

Reference numeral 21 designates an extension pipe as a suction pipe, and the rear end of the extension pipe 21 is detachably connected to the tip of the grip pipe 9 or the front end of another extension pipe 21, and the front end is connected to the other extension pipe. The rear end of 21 or said joint! ! It is detachably connected to the tip of 17.

Next, the structure of this extension tube 21 will be explained with reference to FIGS. 1 to 5.

Reference numeral 22 denotes an extension pipe main body as a suction pipe main body, and this extension pipe main body 22 is formed in a substantially cylindrical shape, and has an air flow path 23 inside. A tapered fitting recess 24 whose diameter increases toward the tip is integrally formed inside the front end of the extension tube main body 22. Further, on the outer side of the rear end of the extension tube main body 22, a fitting convex portion 25 is integrally formed and has a tapered shape that decreases in diameter toward the tip and is removably fitted into the fitting recess 24. It is formed as follows. Furthermore, a cover body 26 is attached to cover approximately half of the outer peripheral side of the extension tube main body 22. The cover body 26 has one end surface aligned with the distal end surface of the fitting recess 24 and the other end surface located at the proximal end of the fitting protrusion 25. A stepped surface 27 including an end surface is formed on the outer circumference of the extension tube 21 to be perpendicular to its axial direction.

Further, a pair of high pressure molds I32 are installed in the space 31 between the outer circumferential surface of the extension tube main body 22 and the cover body 26.
1 along the axial direction. Further, a pair of leaf spring-shaped power supply terminals 33 are supported and fixed in the space 31 at the end on the side of the fitting recess 24, and each of the high voltage molds is connected to these power supply terminals 33. One end of 932 is connected to each other. A through hole 34 is formed in the end face of the extension tube main body 22 so as to face both the power feeding side terminals 33, respectively. It becomes. On the other hand, the space portion 3 is located at the end on the side of the fitting convex portion 25.
1, a pair of round bottle-shaped power receiving side protruding terminals 3 that come into contact with both power feeding side terminals 33 such as another extension tube 21 so as to be able to come into contact with and separate from them.
6 is supported and fixed parallel to the axial direction of the extension tube 21,
The other ends of the high-voltage electric wires 32 are connected to these power receiving side projecting terminals 36, respectively. The tip side of the dual-receiving side protruding terminal 36 penetrates the step surface 27 of the extension tube 21 and protrudes outward, but the portion of the step surface 27 from which the power-receiving side protruding terminal 36 protrudes is located in the recess. 35 is a protruding portion 37 that is fitted into the portion 35.

Roughly speaking, at the end of the space 31 on the fitting recess 24 side,
A locking clamp 41 is located between both the power supply side terminals 33.
is swingably supported by a support shaft 42, and this clamp 41 has a claw-like engaging portion 43 formed at the end of the fitting recess 24 on the distal end side, and an operating portion 44 located on the opposite side. formed at the side end. The engaging portion 43 faces an opening 45 formed at the tip of the fitting recess 24, and the operating portion 44 faces the cover body 2.
It protrudes outward from an opening 46 formed in 6.

Further, the clamp 41 is biased by a spring 47 in a direction in which the engaging portion 43 approaches the central axis of the extension tube 21 . On the other hand, on the outer peripheral surface of the proximal end of the fitting convex portion 25,
Another extension tube 21 is located between the two receiving mold side protruding terminals 36.
A protruding engaged portion 48 is formed to which the retaining portion 43 of the clamp 41 is removably engaged.

Furthermore, the outer circumferential surface of the intermediate portion of the fitting convex portion 25 is provided so that when the fitting convex portion 25 is fitted into the fitting recess 24 of another extension tube 21, the inner circumferential surface of the fitting concave portion 24 A seal backing 49 in the form of a rubber band is fitted for airtight contact.

Also, the fitting opening 8 of the cover body 26! On the end face on the I24 side, a tongue-shaped protruding piece 5 is provided on the outer peripheral side of the through hole 34.
1 is formed to protrude outward in the axial direction of the extension tube 21. On the other hand, at the end of the cover body 26 on the fitting convex portion 25 side, the protruding piece 5 is located on the outer circumferential side of the power receiving side protruding terminal 36 and opens on the outer circumferential side and the stepped surface 27.
A recess portion 52 into which 1 is fitted is formed. and,
The protruding length of the protruding piece 51 is longer than the length of the exposed portion of the power receiving side protruding terminal 36. Further, as shown in FIG. 1, when the fitting concave portion 24 and the fitting convex portion 25 are coaxially fitted, the fitting concave portion The moving length A until the end surface of the extension tube 21 on the 24 side hits the stepped surface 27 of the other extension tube 21 (hereinafter referred to as the length of the fit between the protruding piece 51 and the recess 52) is the length of the movement on the power feeding side. Terminal 33 and power receiving side protruding terminal 3
6 until the end face on the fitting recess 24 side hits the step surface 27 (hereinafter referred to as the moving length B (hereinafter referred to as the power feeding side terminal 3
3 and the electrical contact length between the power receiving side protruding terminal 36) (A>8). Further, as shown in FIG. 5, the retraction hole 34 facing the power supply side terminal 33 is a plane that passes through both side edges of the protruding piece 51 and is in contact with the inner circumferential surface of the fitting recess 24, and the protruding piece 51 It is located inside two planes l that intersect on the outer circumferential side.

The tip fJa of the grip tube 9 of the hose 6 has the same structure as the end of the extension tube 21 on the fitting recess 24 side. Moreover, the tip of the joint pipe 17 of the suction port body 16 is
It has the same structure as the end of the extension tube 21 on the fitting protrusion 25 side. Therefore, in FIG. 6, the protruding piece 51, the recessed part 52, and the operating part 44 of the clamp 41 are given the same reference numerals as those of the extension tube 21 for the grip tube 9 and the joint tube 17 as well.

Next, the operation of the above embodiment will be explained.

When cleaning, use the vacuum cleaner body 1, hose 6, and extension pipe 2.
1 and the suction port body 16 are connected to each other.

For example, when connecting extension tubes 21 to each other, the fitting convex portion 2 of the other extension tube 21 fits into the fitting recess 24 of one extension tube 21.
At the same time, the power receiving side protruding terminal 36 on the fitting convex part 25 side is inserted into the through hole 34 on the fitting recess 24 side and comes into contact with the power feeding side terminal 33 while sliding, and the period is extended. tube 2
The high-voltage electric wire 32 in 1 is electrically connected. At the same time, the engaging portion 43 of the clamp 41 on the fitting concave portion 24 side is engaged with the test subject fitting portion 48 on the fitting convex portion 25 side, and the extension tube 21 is locked. Note that when the connection is completed, the fitting recess 2
A stepped surface 27 on the fitting convex portion 25 side is attached to the end surface of the extension tube 21 on the 4th side.
is brought into contact.

At that time, the protruding piece 51 on the fitting recess 24 side is fitted into the recess 52 on the fitting protrusion 25 side, but the protruding piece 51 and the recess 52
Since the fitting length A between the power feeding side terminal 33 and the power receiving side protruding terminal 36 is larger than the electrical contact length 8 between the power feeding side terminal 33 and the power receiving side protruding terminal 36, the power receiving side protruding terminal The protruding piece 51 is located on the outer peripheral surface of the terminal 36 and is located in the recessed part 52.
It begins to fit. Therefore, when the power receiving side protruding terminal 36 and the power feeding side terminal 33 are in contact with each other, there is no gap between the end surfaces of the cover bodies 26 of the two long pipes 21 located on the outer peripheral side of the power receiving side protruding terminal 36. It becomes. In other words, while there is still a gap between the pair of power receiving side protruding terminals 36 on the outer periphery side, the power receiving side protruding terminal 36 is not in contact with the power feeding side terminal 33, so the user may accidentally fill the above-mentioned gap during connection. You will not get an electric shock even if your finger or skin is caught in the
It's safe. Of course, there is no risk of electric shock even if your skin or the like is caught in the gap that occurs at a position other than the outer peripheral side of the power receiving side protruding terminal 36.

In addition to the relationship between the fitting length and electrical contact length mentioned above,
Since the pair of power receiving side protruding terminals 36 are located inside the plane l that passes through both side edges of the protruding piece 51 and is in contact with the inner peripheral surface of the fitting recess 24, the pair of extension tubes 21 are half connected. Then, the power receiving side protruding terminal 36 is brought into contact with the power feeding side terminal 33, and although there is still a gap between the end surface of the extension tube 21 on the fitting recess 24 side and the step surface 27 on the fitting convex part 25 side, the protruding piece 51 is fitted into the recess 52, as shown in FIG. Even if the wire is inserted into the gap or the wire is wrapped around the above-mentioned gap, the metal piece 56 etc. will not only not come into contact with both power receiving side protruding terminals 36 at the same time, but may even come into contact with one of them. It is extremely safe as it has very little noise and prevents short circuits.

The same thing happens when the metal piece 56 is forced into the extension tube 211m in a state where the connection between the extension tubes 21 is completed, such as during cleaning.

Furthermore, when connecting the extension tubes 21, for example, if the circumferential positional relationship between them is not normal, the fitting recess 24 and the fitting protrusion 25 may be connected to each other, as shown in FIG. When the protrusion piece 51 is partially fitted, the extension tube 2
However, at this time, since the protruding pieces 51 are longer than the exposed portions of the power receiving side projecting terminals 36, these terminals 36 touch the fitting recess 24 side of the extension tube 21. It does not hit the end face of the power receiving side protruding terminal 36. Therefore, the power receiving side protruding terminal 36 will not be damaged.

Further, the protrusion piece 51 and the recessed part 52 serve as a guide for positioning in the circumferential direction when connecting the extension tubes 21, etc., so that the workability of the connection is good.

Then, when cleaning, from the vacuum cleaner main body 111, the power supply side terminal 33 is
The high-voltage condolence telephone 13 relayed by the power receiving side protruding terminal 36
2, 100 AC power is supplied to the electric motor in the suction port body 16, the electric motor is driven, and the rotary brush is rotated to scrape out dust from the carpet or the like. The scraped dust is sucked in from the suction port body 16 by the drive of the electric blower inside the vacuum cleaner body 1, and is drawn into the vacuum cleaner body 1 through the air passage 23 in the extension pipe 21 and the hose 6.
! led to the royal family. At this time, the user can operate the control operation part 12 provided on the grip tube 9 of the hose 6 to turn on and off the electric motor in the suction port body 16, and also turn on and off the electric motor in the vacuum cleaner body 1. Power can be adjusted.

That is, a signal output from the control operation section 12 is transmitted to a control circuit in the cleaner body 1 via the piano wire in the hose 6, and the electric blower is controlled.

The fitting concave portion 24 and the fitting convex portion 25 are in close contact with each other by taper fitting, and the four seal backings provided on the fitting convex portion 25 further ensure airtightness. It has become.

Furthermore, even if a force is applied to the extension tubes 21 in the direction of rotating and prying them together during cleaning, etc., the protruding pieces 5
1 and the recessed portion 52, the two long tubes 21 are mutually prevented from rotating, so the terminals 33, 36, etc. are not damaged and the durability is high.

For cleaning equipment, etc., the vacuum cleaner body 1, hose 6, and extension pipe 21 are included.
and the suction port body 16 are removed from each other, for example, the extension pipe 21
When removing the comrades, press the operating part 44 of the clamp 41 against the biasing force of the spring 47, and press the engaging part 44 of the clamp 41.
The fitting convex portion 25 may be pulled out from the fitting recess 24 while being removed from the engaged portion 48 .

Next, a second embodiment of the present invention will be described based on FIGS. 9 and 10.

In this second embodiment, the entire locking clamp 41 is exposed on the outer surface of the cover body 26, and the distal end side of the clamp 41 having the engaging portion 43 is exposed from the end surface of the extension tube 21 on the fitting recess 24 side. It also serves as the protruding piece 51 that protrudes. Further, the engaged portion 48 to which the retaining portion 43 formed on the protruding piece 51 is removably engaged is connected to the recessed portion 52 on the fitting convex portion 25 side.
is formed on the bottom of the Note that the support shaft 4 of the clamp 41
2 is a bearing hole 57 integrally formed in the extension tube main body 22.
It is deformably fitted and supported rotatably.

According to the configuration of the second embodiment, the clamp 41 has less restrictions on its rotational stroke, and has a simpler structure.
It becomes possible to improve manufacturability and improve strength. Further, since it is easy to make the integral projecting piece 51 and the clamp 41 the same color, and to make the separate clamp 41 and the cover body 26 different colors, a color scheme that makes the projecting piece 51 stand out is easily possible. By making the protruding piece 51, that is, the clamp 41, in a different color from the cover body 26 in this way, the distinguishability is improved, and the alignment in the circumferential direction when connecting the extension tubes 21, etc. is made easier, and the usability is improved. .

11 and 12 show a third embodiment and a fourth embodiment of the present invention, respectively. In these embodiments, the outer surface of the protruding piece 51 on the fitting recess 24 side and the fitting protrusion Display portions 58 and 59 for displaying alignment and indicating the connection direction of the extension tube 21 etc. are provided in the vicinity of the recessed portion 52 on the outer surface of the cover body 26 on the 25 side by silk printing or engraving. has been established.

According to this structure, the user can easily recognize the connection position and direction when connecting the extension tubes 21 and the like. That is, at the time of connection, the protruding piece 51 and the recessed part 52 serve as guide parts for physical alignment due to their shapes, and alignment can also be performed using the display parts 58 and 59. Therefore, misuse can be prevented, usability is improved, and the device can be used with peace of mind.

Next, a fifth embodiment of the present invention will be described based on FIGS. 13 to 17.

In this fifth embodiment, a protruding piece 51 is formed on the end face of the cover body 26 on the side of the fitting convex part 25, located on the outer peripheral side of the power receiving side protruding terminal 36, and on the other hand, a protruding piece 51 is formed on the end face of the cover body 26 on the side of the fitting convex part 25 A recess portion 52 into which the protruding piece 51 is fitted into the end portion of the cover body 26
is formed. Then, similar to the first embodiment above,
The protruding length of the protruding piece 51 is greater than the protruding length of the power receiving side protruding terminal 36. Further, as shown in FIG. 13, the protruding piece 5
1 and the recessed portion 52 is larger than the electrical contact length B between the power feeding side terminal 33 and the power receiving side protruding terminal 36. Furthermore, as shown in FIG.
It is a plane that is in contact with the outer peripheral surface of the projection piece 51 and is located inside two planes l that intersect on the outer peripheral side of the protrusion piece 51.

The configuration of this fifth embodiment also provides the same effects as the first embodiment, but in addition, the power receiving side protruding terminal 3
Since the exposed portion of 6 is always located between the fitting convex portion 25 and the protruding piece 51, the power receiving side protruding terminal 36 is protected and damage is prevented even when the extension tube 21 is not connected. Ru. The projecting terminals 36 on both receiving mold sides are located between the planes that pass through both side edges of the projecting piece 51 and are in contact with the outer peripheral surface of the fitting convex part 25, so that some straight edge of the projecting piece 51 Even if it hits the side edge of the fitting convex portion 25 and the outer peripheral surface of the fitting convex portion 25, it does not hit the power receiving side protruding terminal 36.

In each of the embodiments described above, the width of the protruding piece 51 may be made large enough to cover the entire protruding terminal 36 on both receiving mold sides, but the smaller the width of the protruding piece 51, the easier it is to mold.

FIG. 18 shows a sixth embodiment of the present invention. In this embodiment, the pin-shaped power receiving side protruding terminals 36 have a rectangular front face, and one side of these power receiving side protruding terminals 36 is fitted with a fitting convex portion. 25
in contact with the outer peripheral surface of the

According to this structure, since the area of the pin-shaped power receiving side protruding terminals 36 in contact with the extension tube main body 22 is large, the stability of these power receiving side protruding terminals 36 is good, and the durability against external pressure is strong. The side protruding terminals 36 are not bent or damaged, and reliability is improved.

(Effects of the Invention) According to the present invention, on either the fitting recess side or the fitting protrusion of the suction pipe main body or the cover body having the removable fitting recess or the fitting protrusion at the end, A protruding piece located on the outer periphery side of the power receiving side protruding terminal whose tip side protrudes outward is provided, and a recessed part into which the protruding piece is fitted is provided on the other side, and the fitting starts from the start of fitting between the protruding piece and the recessed part. The length of movement between the mating recess and the mating protrusion until the mating is completed is made larger than the travel length from the start of contact between the power supply terminal and the power receiving protruding terminal until the mating of the mating recess and the mating protrusion is completed. Therefore, even before the mating is complete, when the power supply side terminal and the power receiving side protruding terminal are in contact, there is no gap on the outer periphery of the power receiving side protruding terminal, which reduces the productivity of the simple structure. This improves safety by preventing electric shocks and short circuits between different terminals. In addition, the protruding piece and recessed part serve as a guide for positioning when connecting the suction pipe bodies, and also act as a rotation stopper during cleaning, making the connection work easier and preventing damage to terminals, etc. and improves durability.

In addition, by providing the protruding piece on the protruding side of the power receiving side, the protruding piece that is always located on the outer peripheral surface of the protruding terminal on the power receiving side can protect the protruding terminal on the power receiving side, even when the suction pipe body is not connected. In addition, by locating the power-receiving side protruding terminal inside the plane that passes through both side edges of the protruding piece and touches the outer circumferential surface of the mating convex part, it can contact from the side edges of the protruding piece to the outer circumferential surface of the mating convex part. It is possible to prevent objects from hitting the protruding terminals on the power receiving side, and these protruding terminals on the receiving side can be protected more reliably.

Furthermore, by using the protruding piece as a clamp, the structure can be made simpler, and the protruding piece can also be colored in a different color, improving identification and making connection work easier. can.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a connecting portion showing a first embodiment of a suction pipe for a vacuum cleaner according to the present invention, and FIG. 2 is a sectional view of the same connecting portion.
Fig. 3 is a perspective view of the fitting recess side of the above, Fig. 4 is a perspective view of the fitting convex side of the above, Fig. 5 is a front view of the fitting recess of the above, and Fig. 6 is a perspective view of the fitting convex side of the above.
The figure is an overall perspective view of a vacuum cleaner using the same suction pipe as above.
7 and 8 are perspective views explaining the operation of the same as above, FIG. 9 is a sectional view of the contact portion 1a showing the second embodiment of the present invention, FIG. 10 is a perspective view of the connection portion of the above, and FIG. FIG. 12 is a plan view of a connecting portion showing a third embodiment of the invention, FIG. 12 is a plan view of a connecting portion showing a fourth embodiment of the invention, and FIG. 13 is a plan view of a connecting portion showing a fifth embodiment of the invention.
FIG. 14 is a sectional view of the connecting portion shown in the above example; FIG. 15 is a perspective view of the fitting recess side of the same; FIG.
FIG. 6 is a perspective view of the fitting protrusion side shown above, FIG. 17 is a front view of the fitting protrusion side shown above, and FIG. 18 is a front view of the fitting protrusion side showing a sixth embodiment of the present invention. . 6...Hose as suction pipe, 11...Cover body, 17
...Joint pipe as suction pipe, 21.. Extension pipe as suction pipe, 22.. Extension pipe main body as suction pipe body, 23.
・Air flow path, 24.. Fitting recess, 25.. Fitting protrusion, 2
6... Cover body, 32... High voltage electric wire, 33... Power feeding side terminal, 36... Power receiving side protruding terminal, 41... Clamp, 4
3...Engaging part, 48...Engaged part, 51...Protruding piece, 5
2. Concave part. January 14, 1986 Inventor Nakanishi
Norihiro Nakayama
Child patent applicant Tokyo Electric Co., Ltd. $3 Tutayu J

Claims (3)

[Claims] (1) A plurality of approximately cylindrical suction pipes each having an air flow path inside and having either a tapered fitting recess or a tapered fitting protrusion at each end that are removably fitted to each other. a main body, a cover body attached to the outer circumferential side of the suction pipe main body, and an engaged object provided on the outer circumferential side of the fitting recess of the suction pipe main body and provided on the outer circumferential side of the fitting protrusion of the suction pipe main body. A clamp having an engaging part that is removably engaged with the joint part, a plurality of high voltage electric wires provided between the suction pipe main body and the cover body, and between the fitting recess of the suction pipe main body and the cover body. A plurality of power supply side terminals provided on the main body and connected to the high voltage electric wire, and a fitting convex portion of the suction pipe body and a cover body, the distal end side of which is provided outwardly protruding, and connected to the high voltage electric wire. and a plurality of power receiving side protruding terminals that are in contact with the power receiving side protruding terminals in a manner that the power receiving side protruding terminals can be freely connected to and separated from the power receiving side protruding terminals, and either one of the fitting recess side and the fitting convex side of the suction pipe main body or cover body. a protruding piece located on the outer circumferential side of the power receiving side protruding terminal; a recess into which the protruding piece is fitted; The moving length from the start of fitting between the piece and the recessed part to the completion of fitting between the fitting recess and the fitting protrusion is calculated from the start of contact between the power supply side terminal and the power receiving side protruding terminal to the time when the fitting recess and the fitting convexity are completed. A suction pipe for a vacuum cleaner, characterized in that the length of movement is greater than the length of movement until completion of mating with a mating convex part. (2) The protruding pieces are provided on the fitting convex side where the power receiving side protruding terminals are provided, and are located on the outer circumferential side of the power receiving side protruding terminals, and these power receiving side protruding terminals are fitted through the both side edges of the protruding pieces, respectively. The suction pipe for a vacuum cleaner according to claim 1, wherein the suction pipe for a vacuum cleaner is located inside a plane that is in contact with the outer circumferential surface of the mating convex portion. (3) The vacuum cleaner suction pipe according to claim 1 or 2, wherein the clamp also serves as a protruding piece.