JP2022149233A - External connection device - Google Patents

Abstract

To provide an external connection device having a plurality of plugs that ensure freedom of movement of the plurality of plugs at least in the insertion/extraction direction and in the planar direction perpendicular to the insertion/extraction direction, improves insertability when the plurality of plugs are inserted and removed at the same time, and are electrically connected to a main body device that can prevent damage to a mounting portion of the plug and receptacle on a board.SOLUTION: In an external connection device according to the present invention, a first movable plug unit including a first plug, a first plug mounting board, and a first plug mounting board holding member, and a second movable plug unit including a second plug, a second plug mounting board, and a second plug mounting board holding member are connected so as to be moved independently of each other in at least the insertion/extraction direction of the first plug or the second plug and in a plane direction perpendicular to the insertion/extraction direction of the plug for a plug case due to the elastic deformation of the first elastic member and the second elastic member.SELECTED DRAWING: Figure 1

Description

The present invention relates to an external connection device attachable to a main unit, and more particularly to an external connection device having a plurality of plugs for electrical connection to the main unit.

More specifically, the external connection device of the present invention is for adding functions to the main unit, and is electrically connected to the main unit by a plurality of plugs. Also, the plurality of plugs of the external connection device of the present invention are simultaneously inserted into the plurality of receptacles of the main unit and used for communication with the main unit and power supply.

2. Description of the Related Art Conventionally, an external connection device is known for adding functions to a main body device. For example, there is known an external EVF, which is an external connection device that adds an EVF (electronic viewfinder) function to a camera body, which is a main body device.

The EVF acquires an image in real time by an imaging element provided in the camera body, and displays the image and setting information on a monitor in the finder. The user can observe the monitor through the optical system in the viewfinder of the EVF.

The user can also observe the video captured in real time by the imaging device on the back monitor provided on the camera body. Therefore, depending on how the user uses the camera body, the EVF does not necessarily have to be built into the camera body. In addition, since the built-in EVF increases the size of the camera body, there is a user's desire to mount the EVF only when necessary.

By the way, an externally connected device such as an external EVF needs to communicate with the main unit and supply power. Therefore, the external connection device is provided with a plug that can be electrically connected to the main device. Furthermore, many external connection devices, such as external EVFs, which require a wide variety of electrical connections for audio/video signals, power supply, etc., have a plurality of plugs. In this case, on the contrary, the camera body is provided with a plurality of receptacles for connecting with a plurality of plugs of the external connection device.

It is preferable to provide a mechanism in which a plurality of plugs of the external connection device are simultaneously inserted into a plurality of receptacles of the main device when the external connection device is attached to the main device. As a result, the external connection device and the main body device can have a simple design that is highly convenient for the user.

The following inventions are disclosed in patent documents and the like for the purpose of solving the problem of electrically connecting a single or a plurality of plugs to the main unit, as with such an external connection device.

Patent Document 1 discloses an invention of a relay connector (adapter) having a connector that can be easily inserted into a mating connector of a mobile terminal such as a mobile phone even if a plurality of connectors of different types are arranged in the same insertion/extraction direction in one case. disclosed.

In the invention disclosed in Patent Document 1, in particular, in a connector in which a plurality of connectors of different types are provided in one case in alignment with the insertion/extraction directions, one connector is attached to the case so as to be movable in the insertion/extraction direction, and one connector is attached to the case. By providing an elastic member that always urges the connector in the insertion direction and pushes it forward in the insertion direction from the other connectors, one connector that should be inserted last can be fitted to the mating connector earlier than the other connectors, A connector in which a plurality of connectors of different types are arranged in the same insertion/removal directions in one case can be easily inserted into a mating connector of a mobile terminal such as a mobile phone.

In Patent Document 2, when connecting a connector provided on the side of an electronic device such as a digital camera, a mobile phone, a digital video camera, and a connector provided on the side of a cradle such as a charger, a An invention of a connector is disclosed which has a floating structure for absorbing misalignment of connection between connectors by providing a degree of freedom for lateral movement.

In the invention disclosed in Japanese Patent Application Laid-Open No. 2002-200002, particularly, when a connector of a digital camera or the like is connected to a connector provided on the cradle side, one connector is provided with a connector when the connection between the connector and the other connector is released. Due to the floating structure that adopts a connector that returns the connector to its original position by the restoring force of the elastic member, it is possible to move freely within a certain range to absorb errors during connection, and the connection is released. A connector can be provided that has a centering structure that returns to a centered position when it is engaged.

In Patent Document 3, at least one fitting portion into which plug bodies of a plurality of connection cables are fitted individually or collectively is provided, and each fitting portion is provided with a gap between a pair of outer wall surfaces of the fitted plug bodies. A plug body comprising a pair of parallel inner wall surfaces facing each other through a gap, an elastic body having a pair of parallel outer surfaces disposed in each gap, and one outer surface of each elastic body facing the outer surface. A cable unit invention is disclosed that includes a plurality of connection cables fixed to an outer wall surface or an inner wall surface of a fitting portion, and an attachment that integrally holds the plug bodies of the plurality of connection cables.

In the invention disclosed in Patent Document 3, in particular, the elastic deformation of the elastic body arranged in the gap between the inner wall surface of the attachment and the outer wall surface of the plug body improves the ease of inserting and removing multiple connection cables from the electronic device. can be made

JP 2007-115554 A JP-A-2005-129453 JP 2019-050077 A

However, the inventions disclosed in patent documents and the like have the following problems.

The invention disclosed in Patent Document 1 has a problem that the apparatus cannot be miniaturized. In the invention of the relay connector (adapter) of Patent Document 1, it is necessary to connect the printed wiring board and the plug attached to the case so as to be movable in the inserting/removing directions (forward and backward directions) with lead wires. The space for arranging the lead wires must be designed to be large, taking into account slack beyond the travel distance of the plug and the shape that changes significantly when the plug is moved. This prevents downsizing of the device.

Moreover, the invention disclosed in Patent Document 1 has a problem that the degree of freedom of movement of the plug is only in the insertion/removal direction. In the invention of the relay connector (adapter) of Patent Document 1, there is no degree of freedom of the plug in the planar direction perpendicular to the insertion/removal direction, etc., and it is not possible to absorb the mutual positional deviation of a plurality of plugs in all directions. .

The invention disclosed in Patent Literature 2 has a problem that it does not consider inserting a plurality of plugs at the same time. The invention of the connector having the floating structure of Patent Document 2 merely absorbs the positional deviation that occurs in a single plug, and does not take into consideration the absorption of positional deviation that occurs in a plurality of plugs at the same time.

The invention disclosed in Patent Document 3 has a problem that the degree of freedom of movement of the plug is limited to translational movement and rotational movement. In the invention of the cable unit including the attachment of Patent Document 3, there is no degree of freedom of the plugs in the insertion/removal direction, etc., and it is not possible to absorb the positional deviation of the plurality of plugs in all directions.

Moreover, the invention disclosed in Patent Document 3 has a problem that the degree of freedom of elastic deformation of the elastic member provided on the outer periphery of the plug is limited. In the invention of the cable unit including the attachment of Patent Document 3, the degree of freedom of the plug depends on the elastic deformation of the elastic body. cannot be fully demonstrated.

The inventions disclosed in the above-mentioned patent documents have a common problem that they do not take into account slight positional deviations of a plurality of plugs.

When the plugs are directly mounted on the board by soldering, the plurality of plugs are slightly misaligned with each other due to misalignment of the mounting positions of the plugs or floating. In addition, manufacturing errors in the plugs and related parts may cause slight positional deviations between the plurality of plugs.

In the inventions disclosed in the above patent documents, when connecting a plurality of plugs at the same time, it is not possible to absorb a slight positional deviation of the plurality of plugs, and a receptacle to be fitted with any of the plugs cannot be accommodated. position may not match. If the plug and the receptacle are misaligned, even if the amount of positional deviation is very small, the plug cannot be inserted into the receptacle in the first place, and frictional resistance deteriorates insertion/extraction performance. Furthermore, if a plurality of plugs are forcibly inserted into a receptacle while the plugs are slightly misaligned with each other, an excessive load is applied to the mounting portion of the substrate for the plugs or receptacles, and this mounting portion may be damaged. There is a risk that it will be lost.

An object of the present invention is to solve the above-described problems, and the present invention provides freedom of movement of a plurality of plugs at least in the insertion/removal direction and in the planar direction perpendicular to the insertion/removal direction in order to absorb minute positional deviations that occur between the plurality of plugs. It is an object of the present invention to ensure accuracy, improve insertion/extraction performance when inserting/extracting a plurality of plugs at the same time, and prevent damage to a mounting portion of a plug and a receptacle on a substrate. Another object of the present invention is to reduce the size of a plug case unit that houses a plurality of plugs at the same time.

In order to solve the above problems, a first invention of an external connection device according to the present invention is an external connection device having a plurality of plugs for electrically connecting to a main unit, comprising: a plug case; a first plug mounting board on which the first plug is directly mounted; a first plug mounting board holding member for holding the first plug mounting board; and a first plug mounting board holding member. to the inside of the plug case; a second plug; a second plug mounting board for directly mounting the second plug; and a second plug mounting board for holding the second plug mounting board. 2 plug mounting board holding members, and a second elastic member connecting the second plug mounting board holding member to the inside of the plug case, wherein the first plug and the first plug mounting board and a first movable plug unit comprising the first plug mounting board holding member, and a second movable plug comprising the second plug, the second plug mounting board and the second plug mounting board holding member. By elastic deformation of the first elastic member and the second elastic member, the unit is at least perpendicular to the insertion/extraction direction of the first plug or the second plug and the insertion/extraction direction of the plug with respect to the plug case. characterized in that they are connected so as to be movable independently of each other in horizontal directions.

In a second aspect of the external connection device according to the present invention, projections formed on the first plug-mounted board holding member and the second plug-mounted board holding member, respectively, are connected to the first elastic member and the second plug-mounted board holding member. The first plug mounting board holding member, the second plug mounting board holding member, the first elastic member, and the second elastic member are inserted into the through holes respectively formed in the two elastic members. and are connected.

In a third aspect of the external connection device according to the present invention, a first concave portion for fitting the outer portion of the first elastic member and the outer portion of the second elastic member are provided inside the plug case. A second concave portion for fitting is formed, and the first elastic member and the second elastic member are held between the upper and lower surfaces of the plug case, respectively.

A fourth aspect of the external connection device according to the present invention is characterized in that a cushioning member is provided around the first plug and the second plug for filling a gap between the through hole of the plug case and the plug case. .

According to the present invention, when a plurality of plugs are inserted and removed at the same time, it is possible to absorb minute positional deviations that occur between the plurality of plugs, improve the insertion and removal of the plurality of plugs, and improve the plug and receptacle mounting portions on the substrate. It is possible to prevent the breakage of the plug and to provide a compact plug case unit that houses a plurality of plugs.

It is a perspective view showing an external EVF. FIG. 4 is a perspective view showing how an external EVF and a camera body are attached; It is a perspective view which shows a plug case part. FIG. 4 is an exploded perspective view showing parts forming a plug case; 4 is a perspective view showing movable plug units A and B; FIG. 4 is an exploded perspective view showing parts constituting movable plug units A and B; FIG. It is an A-A' cross-sectional view of the plug case portion. It is a top view which shows a plug case part. It is a perspective view which shows a mode that the elastic member was seen from the front. It is a perspective view which shows a mode that the elastic member was seen from back.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, detailed descriptions of parts that are not directly related to the present invention, even if they are the whole or a part of the system including the present invention, will be omitted.

This example is an external EVF according to an embodiment of the external connection device of the present invention. In addition, embodiment of this invention is not limited to this Example.

FIG. 1 is a perspective view showing an external EVF. The external EVF 200 adds the function of an electronic viewfinder (EVF) to the camera body. On the other hand, if you don't need this function, you can remove it from the camera body.

FIG. 2 is a perspective view showing how the external EVF and the camera body are attached. The external EVF 200 is mechanically and electrically connected to the camera body 100 . Power is supplied from the camera body 100 to the external EVF by electrical connection, and video signals and control signals are transmitted.

One method of electrically connecting the external EVF 200 and the camera body 100 is fitting of a plug and a receptacle. In this embodiment, a plurality of plugs are provided on the external EVF side, and a plurality of receptacles are provided on the camera body side. By fitting these plugs and receptacles, the external EVF 200 and the camera body 100 can be electrically connected.

In FIG. 1 , the external EVF 200 includes an EVF unit section 210 , a base section 220 and a cover section 230 .

The EVF unit section 210 displays the video signal acquired by the imaging element of the camera body 100 on a small monitor built in the EVF unit section 210, and the user observes this small monitor through the finder optical system built in the EVF unit section 210. This is the part to do.

The base portion 220 includes a plug case portion 300 , positioning pins 400 and fixing screws 500 .

The plug case portion 300 includes a plurality of plugs 310 , an attachment/detachment detection pin 320 and a plug case lever 330 .

The plurality of plugs 310 consist of a plug A for video signal transmission and a plug B for power supply. The standards of the plurality of plugs 310 are different from each other, and the shapes, pin arrangements, etc. are different. The external EVF 200 of this embodiment employs a plurality of plugs 310 configured with plugs of different standards, but may employ a plurality of plugs configured with plugs of the same standard.

The attachment/detachment detection pin 320 is for detecting attachment/detachment of the external EVF 200 to/from the camera body 100 . A contact is provided at a position corresponding to the attachment/detachment detection pin 320 on the camera body 100 . When the external EVF 200 is removed from the camera body 100, the attachment/detachment detection pin 320 is biased toward the outside of the external EVF 200 and exposed. When the external EVF 200 is attached to the camera body 100 , the attachment/detachment detection pin 320 abuts on a contact arranged on the side surface of the camera body 100 and retracts inside the external EVF 200 . The control unit of the camera body 100 detects short-circuiting of the contacts due to the contact of the attachment/detachment detection pin 320 . Thereby, the control unit of the camera body 100 determines that the external EVF 200 is attached, and starts predetermined control.

The plug case lever 330 is provided integrally with the plug case portion 300 and is always biased toward the camera body 100 together with the plug case portion 300 by a spring mechanism (not shown) arranged inside the base portion 220 . As a result, the plurality of plugs 310 included in the plug case portion 300 are always largely exposed to the outside of the external EVF 200, so that the user can easily remove the plurality of plugs 310 of the external EVF 200 when attaching the external EVF 200 to the camera body 100. and a plurality of receptacles of the camera body 100 are aligned.

The positioning pin 400 determines the correct position of connection between the external EVF 200 and the camera body 100 .

The fixing screw 500 is for fixing the external EVF 200 after it is attached to the camera body 100 so as to prevent it from coming off. By setting the fixing screw 500 to the same standard as the tripod screw, it becomes easy to attach other peripheral options when the external EVF 200 is removed, and the convenience of the camera body 100 is enhanced. The operation of tightening or releasing the fixing screw 500 is performed by a fixing screw dial 221 provided on the base portion 220 of the external EVF 200 shown in FIG.

The cover part 230 is for hiding the internal structure of the external EVF 200 .

Next, a procedure for attaching the external EVF 200 to the camera body 100 will be described.

First, the user fits the plurality of largely exposed plugs 310 into the plurality of receptacles provided on the camera body 100 . Since the plurality of plugs 310 are largely exposed, it becomes easier to visually check the alignment of the plugs and receptacles when attaching the external EVF 200 to the camera body 100, thereby enhancing the user's convenience.

Next, the user inserts the plurality of plugs 310 into the plurality of receptacles while pushing the plug case lever 330 toward the camera body 100 . A plug case lever 330 provided integrally with the plug case portion 300 is urged toward the camera body 100 by a spring mechanism (not shown) arranged inside the base portion 220 . Therefore, when inserting the plurality of plugs 310 into the plurality of receptacles, the plug case lever 330 is pushed back toward the external EVF 200 due to the frictional resistance between the plugs and the receptacles. cannot be inserted into Therefore, it is necessary for the user to press the plug case lever 330 toward the camera body 100 to apply force for inserting the plurality of plugs 310 into the plurality of receptacles.

After the insertion of the plurality of plugs 310 is completed, the fixing screw dial 221 is operated to fasten the fixing screw 500 to the camera body 100 so that the external EVF 200 does not come off from the camera body 100, and the external EVF 200 is attached to the camera body. Complete the attachment to 100.

FIG. 3A is a perspective view showing a plug case portion; FIG. In FIG. 3A, in order to explain the external appearance of the plug case portion 300, a view seen from the front and a view seen from the rear are shown.

FIG. 3B is an exploded perspective view showing parts that make up the plug case portion 300. As shown in FIG. FIG. 3B is an exploded perspective view of the view seen from the rear in FIG. 3A.

3B, the plug case section 300 includes a plug case 340, a movable plug unit A350, a movable plug unit B360, and an elastic member 370. As shown in FIG.

The plug case 340 includes a plug case top surface 341 , a plug case bottom surface 342 and a plug case front surface 343 .

On the plug case upper surface 341, a flexible board ( An opening 340a is formed for the FPC) to pass through. A plug case front surface 343 is formed with through holes 340c through which a plurality of plugs protrude. A plug case upper surface 341 , a plug case lower surface 342 and a plug case front surface 343 are integrally assembled with screws 344 to form a plug case 340 .

A concave portion 340b into which the elastic member 370 is fitted is formed inside the plug case upper surface 341 and the plug case lower surface 342 . The fitting between the recess 340b and the elastic member 370 will be described later.

The movable plug unit A350 includes a plug A for video transmission and a plug A mounting substrate. A connector for connecting the FPC is mounted on the surface of the plug A mounting board. The configuration of the movable plug unit A350 will be described later.

The movable plug unit B360 includes a plug B for power supply and a plug B mounting board. A connector for connecting the FPC is mounted on the back surface of the plug B mounting board. The configuration of the movable plug unit B360 will be described later.

The elastic member 370 is for connecting the movable plug unit A 350 and the movable plug unit B 360 inside the plug case 340 . How the elastic member 370 connects the movable plug unit A350 and the movable plug unit B360 to the inside of the plug case 340 will be described later.

FIG. 4A is a perspective view showing the movable plug unit A350 and the movable plug unit B360. In addition to these, FIG. 4A also illustrates the elastic member 370 .

FIG. 4B is an exploded perspective view showing parts forming the movable plug unit A350 and the movable plug unit B360.

4B, the movable plug unit A350 includes a plug A351, a plug A mounting board 352, and a plug A mounting board holding member 353. As shown in FIG. Similarly, the movable plug unit B 360 includes a plug B 361 , a plug B mounting board 362 and a plug B mounting board holding member 363 .

The movable plug unit A350 includes a plug A351 for image transmission, and is movable with respect to the plug case 340 by an elastic member 370 at least in the insertion/extraction direction of the plug A351 and in a planar direction perpendicular to the insertion/extraction direction.

A plug A mounting board 352 is a board for mounting the plug A 351 . The plug A 351 is mounted on the plug A mounting substrate 352 by soldering. In this embodiment, by directly mounting the plug A 351 on the plug A mounting board 352, it is possible to omit the arrangement space for the lead wires and the like, and the plug case section 300 can be miniaturized. A connector 352a for connecting with a main board arranged inside the base portion 220 of the external EVF 200 is mounted on the plug A mounting board 352 by an FPC (not shown).

The plug A mounting board holding member 353 is a member for holding the plug A mounting board 352 . The FPC (not shown) and the plug A mounting board 352 are fastened together with screws 354 to the plug A mounting board holding member 353 . Since the FPC is not shown in FIG. 4A, the screws 354 are shown floating accordingly. The plug A mounting board holding member 353 is formed with a projecting portion 353 a for connecting to the through hole of the elastic member 370 . The connection between the protrusion 353a formed on the plug A mounting board holding member 353 and the through hole of the elastic member 370 will be described later.

The movable plug unit B360 includes a plug B361 for power supply, and is movable with respect to the plug case 340 by an elastic member 370 at least in the insertion/extraction direction of the plug B361 and in a planar direction perpendicular to the insertion/extraction direction.

The aspects of the plug B mounting board 362 and the plug B mounting board holding member 363 in the movable plug unit B360 are the same as in the movable plug unit A350.

FIG. 6A is a perspective view of the elastic member as seen from the front. FIG. 6B is a perspective view showing the elastic member as seen from the rear. 4A and 4B, two elastic members 370 are connected to each of the movable plug unit A350 and the movable plug unit B360. Although each shape is slightly different depending on the arrangement space in the plug case 340, the functional shape is almost the same, so one elastic member 370 will be described with reference to FIGS. 6A and 6B.

In this embodiment, the elastic member 370 is molded as a single body using an elastic material such as rubber. As shown in FIGS. 6A and 6B, the shape of the elastic member 370 is divided into an upper portion 371 , a lower portion 372 and a support portion 373 . In the elastic member 370 of this embodiment, the support portion 373 connects the upper portion 371 and the lower portion 372 to integrate the elastic member 370, thereby improving the assembling efficiency of the plug case portion 300. It is not a part that must necessarily be formed on the elastic member of the

Through holes 370 a are formed in the upper portion 371 and the lower portion 372 . A protrusion 353a or a protrusion 363a formed on the plug A mounting board holding member 353 or the plug B mounting board holding member 363 is connected to the through hole 370a.

In addition, a hollow portion 370b is formed in the upper portion 371 and the lower portion 372. As shown in FIG. By forming the hollow portion 370b, the cross-sectional areas of the upper portion 371 and the lower portion 372 can be reduced to reduce the restoring force against the lateral force of the elastic member 370, thereby reducing the movement of the movable plug units A350 and B360. You can adjust the ease.

Further, the upper portion 371 and the lower portion 372 are formed with outer portions 370c. When the plug case 340 is assembled, the external shape portion 370c fits into the concave portion 340b formed inside the plug case upper surface 341 and the plug case lower surface 342. As shown in FIG. As a result, the movable plug unit A 350 and the movable plug unit B 360 and the plug case 340 are connected by the elastic member 370 .

Next, the structure for connecting the movable plug unit A350 and the movable plug unit B360 to the inside of the plug case 340 by means of the elastic member 370 will be described in detail.

5A is a cross-sectional view of the plug case portion taken along the line A-A' based on the plan view showing the plug case portion of FIG. 5B. FIG. 5A especially shows how the movable plug unit A350 including the video transmission plug A351 is connected to the plug case 340. FIG.

The elastic member 370 and the movable plug unit A350 are arranged such that the protrusions 353a formed on the plug A mounting board holding member 353 included in the movable plug unit A350 are inserted into the through holes 370a of the upper portion 371 and the lower portion 372 of the elastic member 370. Concatenate by The same applies to the connection between the elastic member 370 and the movable plug unit B360.

The elastic member 370 and the plug case upper surface 341 and the plug case lower surface 342 are fitted with the external shape portions 370c of the upper portion 371 and the lower portion 372 of the elastic member 370 in the concave portions 340b formed inside the plug case upper surface 341 and the plug case lower surface 342. By doing

As described above, by interposing the elastic member 370 between the movable plug unit A350 and the plug case upper surface 341 and the plug case lower surface 342, the degree of freedom of movement of the plug A351 included in the movable plug unit A350 with respect to the plug case 340 is increased. can be secured. Since the movable plug unit A350 is connected to the plug case 340 only through the freely elastically deformable elastic member 370, the plug A351 can move at least in the insertion/removal direction and in the planar direction perpendicular to the insertion/removal direction. The same applies to the plug B361 included in the movable plug unit B360, and the plug A351 and the plug B361 can move independently of each other with respect to the plug case 340.

In this embodiment, the elastic member 370 is not adhered to the plug A mounting board holding member 353 , the plug B mounting board holding member 363 , the plug case upper surface 341 or the plug case upper surface 341 . Accordingly, free elastic deformation of the elastic member 370 is not hindered, and free movement of the plug A351 and the plug B361 is not restricted. Further, since the elastic member 370 is sandwiched between the plug case upper surface 341 and the plug case lower surface 342, no bonding process is required, so that the plug case portion 300 can be assembled easily.

Furthermore, in a state where no load is applied to the plug A351 or the plug B361, the restoring force of the elastic member 370 can return the movable plug unit A350 or the movable plug unit B360 to the fixed position.

In this embodiment, the elastic member 370 is arranged so as to be biased toward the ends of the movable plug unit A350 and the movable plug unit B360. Therefore, when no load is applied to the plug A351 or the plug B361, the movable plug unit A350 and the movable plug unit B360 may tilt with respect to the plug case 340 due to gravity. In this case, gaps are generated between the through holes 340c formed in the front face 343 of the plug case through which the plurality of plugs protrude, and the plugs A351 and B361. You may lose it. Therefore, in this embodiment, a cushioning member 355 such as urethane sponge is arranged around the plug A351 and the plug B361. Thereby, the gap between the plug A351 and the plug B361 and the through hole 340c formed in the front surface 343 of the plug case can be filled without restricting the degree of freedom of movement of the plug A351 and the plug B361 in a state where no load is applied. and the plug A 351 and plug B 361 can be returned to their home positions.

As described above, according to the present invention, when an external connection device having a plurality of plugs for electrical connection is attached to a main unit, minute positional deviations occurring between the plurality of plugs can be absorbed. The degree of freedom of movement of the plurality of plugs is secured at least in the insertion/removal direction and in the plane direction perpendicular to the insertion/removal direction, and the ease of insertion/removal when inserting/removing multiple plugs at the same time is improved. It is possible to prevent the breakage of the part. At the same time, it is possible to reduce the size of the plug case portion containing a plurality of plugs, and to improve the assembling efficiency of the plug case portion.

100 camera body 200 external EVF
210 EVF unit part 220 base part 221 fixing screw dial 300 plug case part 310 a plurality of plugs 320 attachment/detachment detection pin 330 plug case lever 340 plug case 341 plug case upper surface 342 plug case lower surface 343 plug case front surface 350 movable plug unit A
351 Plug A
352 Plug A mounting board 353 Plug A mounting board holding member 355 Cushioning member 360 Movable plug unit B
361 Plug B
362 Plug B mounting board 363 Plug B mounting board holding member 370 Elastic member 400 Positioning pin 500 Fixing screw 230 Cover part

Claims (4)

An external connection device having a plurality of plugs for electrically connecting to a main unit,
a plug case;
a first plug;
a first plug mounting board on which the first plug is directly mounted;
a first plug mounting board holding member that holds the first plug mounting board;
a first elastic member that connects the first plug mounting board holding member to the inside of the plug case;
a second plug;
a second plug mounting substrate on which the second plug is directly mounted;
a second plug mounting board holding member that holds the second plug mounting board;
a second elastic member that connects the second plug mounting board holding member to the inside of the plug case;
a first movable plug unit comprising the first plug, the first plug mounting board and the first plug mounting board holding member; the second plug, the second plug mounting board and the second plug mounting board; A second movable plug unit comprising a plug mounting board holding member of (1) is configured to move at least the first plug or the second plug with respect to the plug case by elastic deformation of the first elastic member and the second elastic member. An external connection device, wherein the external connection device is connected so as to be movable independently of each other in a plug insertion/removal direction and a plane direction perpendicular to the plug insertion/removal direction. Protrusions respectively formed in the first plug mounting board holding member and the second plug mounting board holding member are inserted into through holes respectively formed in the first elastic member and the second elastic member. 2. The first elastic member and the second elastic member are connected to the first plug mounting board holding member and the second plug mounting board holding member, respectively. external connection device. forming a first recess for fitting the outer shape of the first elastic member and a second recess for fitting the outer shape of the second elastic member inside the plug case;
3. The external connection device according to claim 1, wherein the first elastic member and the second elastic member are sandwiched between the upper and lower surfaces of the plug case, respectively. 4. The exterior according to any one of claims 1 to 3, wherein a cushioning member is provided around said first plug and said second plug for filling a gap between said plug case and said through hole. connection device.

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