JP2013069715A - Cable electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable electronic device which, while facilitating cable connections, can also secure waterproofness.SOLUTION: The cable electronic device comprises: a cable 1 having a plurality of electric wires 11; a body 3 having a cable insertion hole 31 which communicates with a housing recess 30 and with the inside and outside of the housing recess 30; a bushing 7, made of a flexible material, which blocks a space between the body 3 and the cable 1; and a fixing member 8 which is joined to the body 3 to hold the bushing 7 between the body 3 and itself. A connector 6 consisting of a plug 61 which is connected to one end of the cable 1 and a receptacle 62 which is housed inside the housing recess 30 is used to connect the cable 1. This composition makes it easier to connect the cable 1 than when the connector 6 is not used. Furthermore, the bushing 7 having a flange 72 in elastic contact with the inner periphery of a cylindrical salient 32 formed in the body 3 helps to secure waterproofness.

Description

  The present invention relates to wired electronic devices.

  Conventionally, a wired electronic device having a waterproof structure that is assumed to be used outdoors or in a water field has been provided (see, for example, Patent Document 1).

  As shown in FIG. 6, this type of wired electronic device includes a body 3 having a housing recess 30 in which the printed wiring board 2 is housed, a cover 4 that closes the housing recess 30, and a cable insertion provided in the body 3. The cable 1 is introduced into the housing recess 30 through the hole 31. Moreover, in order to ensure waterproofness, the clearance gap between the inner peripheral surface of the cable penetration hole 31 and the outer peripheral surface of the cable 1 is obstruct | occluded with the ring-shaped bush 7 which consists of flexible materials and surrounds the cable 1. FIG. The bush 7 is fixed by a fixing member 8 coupled to the body 3 in such a manner that the bush 7 is sandwiched between the bush 7 and the body 3.

  Conventionally, a plurality of electric wires (not shown) included in the cable 1 are connected to the printed wiring board 2 in the housing recess 30 using means such as soldering and screw terminals.

JP 2003-329300 A

  However, in the above case, when connecting the cable 1, it is necessary to perform connection work of each electric wire in the housing recess 30, and the work is relatively difficult. In addition, when the cable 1 from which the sheath (not shown) for binding the electric wires is largely removed is to be inserted into the cable insertion hole 31, the plurality of electric wires spread greatly, so that the insertion into the cable insertion hole 31 itself is prevented. It can be difficult.

  In order to facilitate the connection of the cable 1, it is conceivable to use a connector. The connector includes a receptacle disposed in the housing recess 30 and a plug provided at one end of the cable 1 and detachably coupled to the receptacle.

  In general, since the cross-sectional shape of the plug is larger than the cross-sectional shape of the cable 1, when the connector is used as described above, the cable insertion hole 31 needs to be sufficiently large to allow the plug to be inserted.

  However, if the cable insertion hole 31 is enlarged, it is difficult to ensure waterproofness.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a wired electronic device that can ensure waterproofness while facilitating connection of a cable.

  The wired electronic device of the present invention includes a cable having a plurality of electric wires, a plug provided at one end of the cable and electrically connected to each electric wire, a receptacle constituting a connector together with the plug, and the receptacle. And a body having a cable insertion hole through which the cable is inserted, the body being connected to the inside and the outside of the storage recess, and having a cable insertion hole through which the cable is inserted. A cover that closes the housing recess, a bush that is made of a flexible material, closes the gap between the body and the cable, and a fixing member that is coupled to the body and sandwiches the bush between the body. The body is provided with a cylindrical cylindrical protrusion that surrounds the bush outside the storage recess, and the bush A cylindrical portion that elastically contacts the peripheral surface over the entire circumference, and a flange that protrudes outward from the outer peripheral surface of the cylindrical portion and elastically contacts the inner peripheral surface of the cylindrical convex portion, and the fixing member is The pressing portion has a pressing portion that comes into contact with a surface of the flange portion that faces the outside of the storage recess.

  In the wired electronic device described above, it is preferable that the body has a sandwiching portion that sandwiches the flange portion between the body and the pressing portion.

  In the wired electronic device, the cylindrical portion protrudes in a direction away from the housing recess than the collar portion, and the fixing member has an enclosing portion that abuts on an outer peripheral surface of the cylindrical portion. It is desirable.

  Furthermore, in the above wired electronic device, the cylindrical portion protrudes in a direction away from the housing recess than the collar portion, and the fixing member has a retaining portion facing the distal end surface of the cylindrical portion. It is desirable to have.

  According to the present invention, the connection of the electric wire to the plug is relatively easier than the connection of the electric wire into the housing recess, and the plug is easier to introduce into the cable insertion hole than the plurality of electric wires. Therefore, the cable can be easily connected as compared with the case where the connector is not used. Moreover, waterproofness can be ensured by the bush which elastically contacts the outer peripheral surface of the cable and the inner peripheral surface of the cylindrical convex portion.

It is a disassembled perspective view which does not include the cover which shows the principal part of embodiment of this invention. It is the partially broken perspective view which shows the principal part same as the above. It is a perspective view which does not include the cover which shows the principal part same as the above. It is sectional drawing which shows the principal part same as the above. It is a perspective view which shows a fixing member same as the above. It is sectional drawing which shows a prior art example.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  In this embodiment, as shown in FIGS. 1 to 4, a cable 3, a printed wiring board 2 to which the cable 1 is electrically connected, and a body 3 provided with a storage recess 30 for storing the printed wiring board 2. And a cover 4 that closes the storage recess 30. The body 3 and the cover 4 can be formed of, for example, a synthetic resin. Further, as means for coupling the body 3 and the cover 4 to each other, for example, screwing can be used.

  Hereinafter, the direction in which the cable 1 is pulled out from the body 3 (the lower left direction in FIG. 1) is referred to as the front with reference to FIG. That is, the direction in which the housing recess 30 is opened is referred to as the upper side. Note that the above directions are defined for convenience of explanation and do not necessarily match the directions in the actual use state.

  The cable 1 is a so-called cabtire cord, and a plurality of (for example, 18) electric wires 11 are bundled by a sheath 12 made of an insulating material.

  The printed wiring board 2 is fixed in the housing recess 30 by, for example, screwing, with the thickness direction directed vertically. In the printed wiring board 2, a plurality of tact switches 21 (see FIG. 2) for accepting operation inputs and the operation inputs accepted by the tact switches 21 are provided on the lower surface of the storage recess 30. An electronic circuit (not shown) that outputs an electric signal to an appropriate electric wire 11 is mounted.

  In the body 3, operation holes 35 are provided below the tact switch 21. Further, a rubber member 5 made of synthetic rubber is disposed between the body 3 and the printed wiring board 2. Each of the rubber members 5 has a transmission portion 51 that is located in the operation hole 35 and contacts the tact switch 21. The lower surface of the body 3 is covered with a flexible sheet 9 made of synthetic resin, for example. The sheet 9 is fixed to the body 3 by adhesion, for example. That is, when an upward pressing force is applied to the transmission portion 51 of the rubber member 5 from below the body 3 via the seat 9, the rubber member 5 is elastically deformed and the transmission portion 51 is displaced upward with respect to the body 3. Thus, the tact switch 21 is pushed.

  In the present embodiment, the electrical connection between the cable 1 and the printed wiring board 2 is achieved by the connector 6. The connector 6 includes a plug 61 provided at one end of the cable 1 and a receptacle 62 mounted on the upper surface of the printed wiring board 2 and detachably coupled to the plug 61 by, for example, fitting. Each of the plug 61 and the receptacle 62 has a conductive portion (not shown) corresponding to the electric wire 11 on a one-to-one basis. In the state where the plug 61 and the receptacle 62 are combined, the conductive portions are brought into contact with each other to achieve electrical connection. Since the connector 6 as described above can be realized by a well-known technique, detailed illustration and description thereof are omitted.

  In addition, a cable insertion hole 31 that is a through hole through which the cable 1 is inserted in communication with the inside and outside of the storage recess 30 is provided on the front surface of the body 3. As shown in FIG. 3, the cable insertion hole 31 is larger in the left and right dimensions than the cable 1, and the plug 61 can be inserted therethrough.

  Further, a bush 7 made of a flexible material is interposed between the cable 1 and the body 3. Further, the present embodiment includes a fixing member 8 that prevents the bush 7 from falling off the body 3 by being coupled to the body 3 with the bush 7 sandwiched between the body 3 and the body 3. For example, an elastomer can be used as the material of the bush 7, and a synthetic resin can be used as the material of the fixing member 8, for example.

  Further, on the front surface of the body 3, a cylindrical cylindrical convex portion 32 surrounding the bush 7 is projected, and the fixing member 8 is fixed to the body 3 by screwing to the cylindrical convex portion 32 from the front. .

  The bush 7 protrudes left and right from the outer peripheral surface of the rear end portion of the cylindrical portion 71 and is in contact with the outer peripheral surface of the cable 1 over the entire periphery, and extends to the inner peripheral surface of the cylindrical convex portion 32. And a flange 72 that elastically contacts the circumference. That is, the cylindrical portion 71 protrudes forward, which is a direction away from the housing recess 30, rather than the flange portion 72. The inner diameter of the cylindrical portion 71 in a state where it is not elastically deformed is slightly smaller than the outer diameter of the cable 1, and the cylindrical portion 71 is slightly elastically deformed so as to increase the inner diameter. Elastic contact with the outer peripheral surface over the entire circumference.

  Further, the inner shape of the cylindrical convex portion 32 is made larger than the cable insertion hole 31 when viewed from the front, and the rear surface of the flange portion 72 is in contact with the front surface of the body 3 inside the cylindrical convex portion 32. That is, the portion of the body 3 that protrudes to the inside of the cylindrical protrusion 32 when viewed from the front is the sandwiching portion 33. In this embodiment, the cylindrical convex part 32 and the collar part 72 are rectangular when viewed from the front, and the sandwiching parts 33 are provided at the four corners of the cylindrical convex part 32. The pinching portion 33 prevents the bush 7 from falling into the storage recess 30.

  The fixing member 8 has a flat shape with the thickness direction directed in the front-rear direction, and has a main body 81 that covers the cylindrical protrusion 32 when viewed from the front. The main body 81 is provided with an insertion hole 80 through which the cable 1 is inserted.

  Further, in the fixing member 8, an encircling portion 82 that protrudes from the rear surface of the main body portion 81 and has a cylindrical shape with the axial direction oriented in the front-rear direction and surrounds the tubular portion 71 of the bush 7 is projected. The inner diameter of the surrounding portion 82 is approximately the same as the outer diameter of the cylindrical portion 71 in a state where it is not elastically deformed, and the surrounding portion 82 is in elastic contact with the outer peripheral surface of the cylindrical portion 71 over the entire circumference. That is, the cylindrical portion 71 of the bush 7 is pressed against the outer peripheral surface of the cable 1 by the surrounding portion 82 of the fixing member 8. Thereby, compared with the case where the surrounding part 82 is not provided, it is hard to produce a clearance gap between the bush 7 and the cable 1. FIG.

  Further, in the fixing member 8, an engaging convex portion 83 that projects into the engaging hole 34 that is opened in the inner surface of the cylindrical convex portion 32 is provided on the lower surface of the surrounding portion 82. In the present embodiment, the fixing member 8 is screwed to the body 3 only at the upper end portion of the main body portion 81 so that the screw SC1 is less noticeable when viewed from below, which is the direction in which the operating force is received. The backlash is suppressed by the joint protrusion 83 engaging with the engagement hole 34.

  Further, in the fixing member 8, an annular retaining portion 84 is provided on the inner peripheral surface of the insertion hole 80 so as to face the front surface (that is, the front end surface) of the cylindrical portion 71 of the bush 7 as shown in FIG. 4. Yes. That is, for example, even when the cable 1 is pulled outward (front side), the forward displacement of the cylindrical portion 71 of the bush 7 is suppressed by the retaining portion 84 of the fixing member 8.

  Further, as shown in FIG. 5, in the fixing member 8, holding portions 85 that are in contact with the front surface of the flange portion 72 of the bush 7 are provided on the left and right sides of the surrounding portion 82. As a result, when the bush 7 is inserted into the cylindrical convex portion 32, the flange 72 is deformed by the frictional force between the flange 72 of the bush 7 and the inner peripheral surface of the cylindrical convex portion 32, so that the inside of the cylindrical convex portion 32. It is possible to prevent a problem that a gap is generated between the peripheral surface and the waterproof property cannot be secured.

  At the time of assembly, first, the cable 1 is passed through the fixing member 8 and the bush 7 without the cover 4 being attached to the body 3, and the plug 61 is connected to the cable 1. Thereafter, the plug 61 is inserted into the cable insertion hole 31 and connected to the receptacle 62, and the fixing member 8 is fixed to the body 3. At this time, the bush 7 can be pushed into the back (rear) of the cylindrical convex portion 32 by pressing the flange portion 72 from the front by the pressing portion 85 of the fixing member 8. In addition, since a relatively large gap is generated between the cable 1 and the inner peripheral surface of the cable insertion hole 31 on both the left and right sides of the cable 1, before the cover 4 is attached, It can be visually confirmed whether the bush 7 is inserted to a predetermined position through the gap.

  According to the above configuration, the connection of the electric wire 11 to the plug 61 outside the storage recess 30 is relatively easier than the connection of the electric wire 11 into the storage recess 30 because the body 3 does not get in the way, and the plug 61 Is easier to introduce into the cable insertion hole 31 than the plurality of electric wires 11, so that the connection of the cable 1 is easier than when the connector 6 is not used. Further, when removing the cable 1, it is only necessary to release the coupling between the plug 61 and the receptacle 62, and it is not necessary to release the connection for each electric wire 11. Therefore, the cable 1 can be replaced as compared with the case where the connector 6 is not used. Becomes easy. Furthermore, waterproofness can be ensured by the bush 7 that elastically contacts the outer peripheral surface of the cable 1 and the inner peripheral surface of the cylindrical convex portion 32.

DESCRIPTION OF SYMBOLS 1 Cable 3 Body 4 Cover 6 Connector 7 Bush 8 Fixing member 11 Electric wire 30 Storage recessed part 31 Cable insertion hole 32 Tubular convex part 33 Clamping part 61 Plug 62 Receptacle 71 Cylindrical part 72 Cage part 82 Enclosing part 84 Retaining part 85 Holding part

Claims (4)

A cable having a plurality of electric wires;
A plug provided at one end of the cable and electrically connected to each wire;
A receptacle constituting a connector together with the plug;
A storage recess in which the receptacle is stored; and a body having a cable insertion hole through which the cable is inserted and has a size and shape that allows the plug to be inserted into and out of the storage recess.
A cover coupled to the body to close the housing recess;
A bush made of a flexible material, closing the gap between the body and the cable;
A fixing member coupled to the body and sandwiching the bush between the body,
On the body, a cylindrical cylindrical convex portion surrounding the bush is projected outside the storage concave portion,
The bush includes a cylindrical portion that elastically contacts the outer peripheral surface of the cable, and a flange that protrudes outward from the outer peripheral surface of the cylindrical portion and elastically contacts the inner peripheral surface of the cylindrical convex portion. Have
The wired electronic device according to claim 1, wherein the fixing member has a pressing portion that abuts against a surface of the collar portion that faces the outside of the storage recess.   The wired electronic device according to claim 1, wherein the body includes a pinching portion that sandwiches the flange portion with the pressing portion. The cylindrical part protrudes in a direction away from the housing recess than the collar part,
The wired electronic device according to claim 1, wherein the fixing member includes an enclosing portion that contacts an outer peripheral surface of the cylindrical portion. The cylindrical part protrudes in a direction away from the housing recess than the collar part,
The wired electronic device according to claim 1, wherein the fixing member has a retaining portion that faces a front end surface of the cylindrical portion.

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