JP4780470B2 - Body - Google Patents

Description

  The present invention relates to a housing having a cable insertion groove that houses an electric circuit board therein and leads a plurality of cables connected to the electric circuit board to the outside.

  In electrical equipment, etc., electrical circuit boards such as the control unit housed in the housing and the controlled equipment are connected by cables, such as door sensors and their door engine control parts, which are very common. However, when the cable is taken out from the housing, if the cable is left free, an unexpected external force is likely to act on the cable, and if a pulling force acts on the cable, it will be connected to the cable and the electric circuit board. There is a possibility that the cable may be detached from the electric circuit board by directly acting on the joint portion.

  For this reason, conventionally, the cable is restrained so that it is not free and, for example, even when a tensile force is applied to the cable, the connection part between the electric circuit board and the cable is disconnected or deformed by the tensile force. In order to prevent the electric circuit board pattern from being peeled off, a cable or the like is hung on the electric circuit board by means of a binding band or a wire attached to the electric circuit board.

  For example, a cable in which a cable connected to a connector of an electric circuit board is hooked on the electric circuit board with a binding band is known. In this configuration, the cable is hooked to the electric circuit board by the binding band, so even if a tensile force is applied to the cable, the pulling force can be received by the binding band attached to the electric circuit board. It does not reach the connection.

  However, in this configuration, the binding band is passed through the hole provided in the electric circuit board, the binding band is first attached to the electric circuit board, and then the cable is bundled with the binding band. Not only is it time-consuming, but when the cable is removed from the electric circuit board for repairing the electric circuit board or the like, the binding band or the like must be unwound or cut, which also takes time for repair and the like. Each time, a new binding band or the like must be prepared and the cable must be hooked on the electric circuit board. In addition, it is necessary to provide holes in the electric circuit board, and the effective area of the electric circuit board is reduced accordingly.

  Another example is known in which a wire is soldered to an electric circuit board, the wire is wound around a cable, and the cable is bound and hooked. In this configuration, the pulling force acting on the cable can be received by the binding band attached to the electric circuit board, and thus does not reach the connector connecting portion of the electric circuit board.

However, even in this configuration, since the wire is soldered to the electric circuit board or the wire is wound around the cable, the assembly work of the electric circuit board and the cable is complicated.
Also, when removing the cable from the electrical circuit board for repair, etc., the cable must be removed after unwinding the wire wound around the cable, and it is necessary to rewind the wire around the cable when reassembling. There is a problem that it takes time and labor.

  Therefore, as shown in FIG. 5, the cable 102 is attached to the edge of the electric circuit board 101 so that the cable can be easily inserted, hooked and removed without using a binding band or a wire. A notch portion 106 is provided, and a through-hole portion 105 continuous with the notch portion 106 is provided integrally. An electric circuit board that is hooked and locked is known (see Patent Document 1).

In this electric circuit board, the cable 102 can be fixed to the electric circuit board 101 without using a binding tool by hooking the cable 102.
However, in this cable latching structure, the notch portion 106 and the through-hole portion 105 are provided in a part of the electric circuit board 101, so that the mounting area of the electric circuit board 101 is sacrificed accordingly. Therefore, when the same circuit is attached, it is necessary to enlarge the electric circuit board 101 correspondingly, and as a result, the housing for housing the electric circuit board 101 must be enlarged at least accordingly.
JP-A-8-236875

An object of the present invention is to easily attach a cable to a housing, and to be difficult to remove once attached, and to bind a cable to an electric circuit board for a cable as in the prior art, and a hooking part for hooking the cable to the electric circuit board. Even if an external force acts on the cable, the external force is prevented from acting on the joint portion of the cable with the electric circuit board .

The invention according to claim 1 is a housing comprising a housing main body housing an electric circuit board therein and a cover body fitted to the housing main body , wherein the cover body is integrally connected to the electric circuit board. the cable insertion groove for inserting the bundled cables provided so as to communicate with the previous SL cable insertion groove a guide groove for introducing the pre-Symbol cable single file from the outside of the cover body relative to said cable insertion groove The cable insertion groove is formed as a cylindrical body having a rectangular cross section elongated in a direction perpendicular to the guide groove, and the cable is bent and introduced from the guide groove into the cable insertion groove. The cable itself closes the communication port between the cable insertion groove and the guide groove while being housed in the cable insertion groove .
According to a second aspect of the present invention, in the housing according to the first aspect, the opening on the outer side of the housing of the cable insertion groove is made smaller than the opening on the inner side of the housing, and is connected to the housed electric circuit board. An external force acting on the plurality of cables is supported by the opening end on the outside of the housing, and is prevented from being transmitted to the connecting portion of the electric circuit board .

Since the present invention has the above-described configuration, a plurality of cables having one end connected to connectors provided at an equal pitch on an electric circuit board housed in a housing are provided on a side wall of a bottom cover which is a cover body of the housing. With all the cables inserted into the guide groove, turn the bottom cover and the cable relative to each other, and change the direction from the guide groove toward the cable insertion groove that follows. Insert while.
By doing in this way, by inserting a plurality of cables connected to the electrical circuit board previously stored in the housing body into the cable insertion groove of the bottom cover of the housing, and then combining the housing body and the bottom cover, The casing can be assembled in a state where a plurality of cables connected to the stored electric circuit board are pulled out from the casing.

According to the present invention, it is easy to put a plurality of cables connected to the electric circuit board into the cable insertion groove of the bottom cover of the housing, and the cable once inserted can be made difficult to come off. In addition, since the outside outlet of the housing is formed narrower than the inside of the housing, even if an external force acts on the cable, the external force is supported by this narrowed opening, and an external force acts on the cable. It is possible to prevent the external force from acting on the joint portion of the cable with the electric circuit board. In addition, since the opening of the cable insertion groove is wider on the inner side of the housing than the outer surface, when the cable bundle is attached to the housing, a load (tensile force) is applied to the connecting portion of the cable connected to the electric circuit board side. Can be prevented .

One embodiment of a housing with a plurality of cables connected to an electric circuit board housed in the housing of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view of a housing that houses an electrical circuit according to the present embodiment, for example, a housing that houses an electrical circuit for an infrared sensor. FIG. 2 is an exploded perspective view of FIG.
As shown in FIG. 2, the housing 1 includes a substantially rectangular container-shaped housing body 10 and a bottom cover 20 of the housing body 10 that forms the housing 1 in combination with the housing body 10. Accommodates the electric circuit board 30.

The casing body 10 is a box-shaped container made of, for example, synthetic resin and surrounded by side walls 14 erected along the four circumferences of the substantially rectangular upper surface 12, and is an end portion on the lower side (upper side in FIG. 2) of the wall surface 14. Is formed with a step portion 16 in which a similar peripheral wall end portion of the bottom cover 20 of the housing body 10 is fitted, and the housing body 10 and the bottom cover 20 are fitted and integrated to accommodate the electric circuit board 30. The frame 1 is configured.
In the present embodiment, an electric circuit 32 including an infrared transmitter circuit and a receiver circuit for an infrared sensor is mounted on the electric circuit board 30. A plurality of connector terminals 34 for connecting the electric circuit 32 and a cable (not shown) are arranged in a line at a predetermined pitch on the lower left side of the center of the electric circuit board 30 in FIG.

The bottom cover 20 of the housing body 10 has a container shape shallower than the substantially rectangular housing body 10 covered with a peripheral wall 24 standing upright from the bottom surface 22 along, for example, the four sides of the substantially rectangular bottom surface 22. It is integrally molded. A plurality of cables 40 having one end connected to the connector terminal 34 of the electric circuit board 30 accommodated in the inside of the housing body 10 are inserted into a part of the side wall 24a of the peripheral wall 24 in a single row from the outside. A slit-shaped guide groove 26 is provided.
In addition, a cable insertion groove 28 for receiving a cable 40 communicating with the guide groove 26 is provided on the bottom surface 22 of the bottom cover 20.

3A is a plan view of the housing 1 viewed from the housing body 10 side, and FIG. 3B is an enlarged view of a part thereof.
As is apparent from the partially enlarged plan view of FIG. 3B, the corner 25 of the outer edge of the guide groove 26 has a smooth arc-shaped cross section to facilitate introduction of the cable 40 into the housing body 10 during assembly. Is formed.
The width of the guide groove 26 may be such that the cable 40 can easily pass through in a single row and can be introduced into the cable insertion groove 28. If the width is too wide, the guide groove 26 is easily guided after being stored in the cable insertion groove 28. Since it becomes easy to go out from the groove | channel 26, the cable accommodated in the cable penetration groove | channel 28 becomes unstable.

  A cable insertion groove 28 is formed integrally with the bottom surface 22 of the bottom cover 20 so as to communicate with the guide groove 26 at the center in the longitudinal direction and extend in a direction orthogonal thereto. Around the cable insertion groove 28, a wall body 29 surrounding three sides excluding the side wall 24a provided with the guide groove 26 of the bottom cover 20 is erected integrally from the side wall 24a and the bottom surface 22, and the inside is entirely as described above. A cylindrical body having an elongated rectangular cross-section and serving as the cable insertion groove 28 is formed. That is, the elongated cylindrical body composed of the side wall 24 a and the wall body 29 constitutes the cable insertion groove 28.

Here, as already described, the cable insertion groove 28 is formed as a space inside the elongated cylindrical body, and the opening 28a of the cable insertion groove 28 on the housing body 10 side is as shown in FIG. 3B. Further, it is formed longer than the opening 28b that opens to the bottom surface side of the bottom cover 20.
This is because the plurality of cables 40 attached to the connector terminals 34 of the electric circuit board 30 at a predetermined pitch can be easily spread at regular intervals in the opening 28a on the housing body 10 side of the cable insertion groove 28. On the other hand, on the bottom surface 22 side of the housing 1, when an external force is applied to the cable 40 so that there is not much space between the cable 40 and the cable 40, the cable 40 has an edge of the opening 28 b of the cable insertion groove 28. This is because the external force can be easily received at the edge of the contact with the contact.

  With the above configuration, when the cable 40 is attached from the guide groove 26 into the cable insertion groove 28, the cable 40 and the bottom cover 20 are rotated so as to be twisted using the wide opening 28a on the housing body 10 side. It is stored in the insertion groove 28.

FIG. 4 is a diagram illustrating an example of a cable connected to the connector terminal 34 of the electric circuit board 30.
As shown in the figure, each of the cables 40 has a connector 42 attached to one end as a joining terminal to the connector terminal 34, and the other end is a control circuit (not shown) for an external device, here a door engine. A junction terminal 44 for connection to the connector terminal is attached. Further, the intermediate portion thereof, that is, the portion inserted into the guide groove 26 or the cable insertion groove 28 is integrally bound by a cover 46 so as to be convenient for handling.

  In the above configuration, when assembling the main housing 1, first, the electric circuit board 30 is arranged in the main body 10. Thereafter, the cable 40 connected to the electric circuit board 30 is grasped and inserted into the cable insertion groove 28 by rotating the bottom cover 20 and the cable 40 relative to each other while inserting them in a single row from the guide groove 26 of the bottom cover 20. The reached cable 40 is bent so as to be twisted upward by about 90 ° in FIG.

By storing the cable in the cable insertion groove 28, the cable itself closes the communication port 27 with the guide groove 26, and even if the cable is slightly displaced, it does not come off through the guide groove 26.
When the cable 40 is thus housed in the cable insertion groove 28 of the bottom cover 20, the bottom cover 20 is finally fitted and integrated with the housing body 10.

Static electricity may be generated when the cable 40 moves in the cable insertion groove 28 or the like. However, in this embodiment, the wall body 29 exists around the cable insertion groove 28 of the cable 40, and the cable 40 When the cable moves in the insertion groove 28, it always comes into contact with the wall body 29, so static electricity generated in the cable 40 is removed by the charge removing function of the wall body 29 and falls (discharges) on the electric circuit board 30. ) Nothing.
In addition, although description of the above embodiment demonstrated as the cover body of this invention being a bottom cover, it is not necessarily limited to a bottom cover, A top cover may be sufficient.

In the present embodiment, the cable 40 can be attached to the housing 1 by a simple operation of simply inserting the cable 40 into the cable insertion groove 28 of the bottom cover 20, and each cable is provided on the opening 28 a side inside the housing body 10. Since it can be freely expanded according to the position of the connector terminal 34 in which the intervals of 40 are arranged at a predetermined pitch, there is no tensile force acting on the joint portion of the connector terminal 34, and on the other hand, the bottom cover which is the drawing side of the cable 40 Since the opening 28b is small on the opening 28b side of the cable 20, the cable is restrained from moving, and when an external force is applied, the external force is supported by the edge of the opening 28b. It is prevented from acting on the joint portion with the substrate 30.
Therefore, it does not use a restraining tool for fixing to the electric circuit board as in the prior art, and does not sacrifice the area of the electric circuit board, and exerts a tensile force on the junction between the electric circuit board and the cable. It is possible to prevent the cable from coming off without causing it to fall.
According to the present embodiment, since the area of the electric circuit board is not sacrificed as in the prior art, the electric circuit board for obtaining the same effective area can be reduced in size, so that the casing itself can also be reduced in size.

It is the perspective view seen from the back surface of the housing which accommodated the electric circuit which concerns on this embodiment. It is a disassembled perspective view of the housing shown in FIG. FIG. 3A is a plan view of the housing viewed from the housing body side, and FIG. 3B is an enlarged view of a part thereof. It is a top view which shows a cable. It is a top view which shows the bundling means of the conventional cable.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing, 10 ... Body main body, 20 ... Bottom cover, 26 ... Guide groove, 28 ... Cable insertion groove, 29 ... Wall body, 30 ... Electric circuit board, 34 ... connector terminal, 40 ... cable.

Claims (2)

A housing comprising a housing body housing an electric circuit board therein and a cover body fitted to the housing body ,
The cable insertion groove for inserting the cables that are bundled into a plurality of integrally connected to the electric circuit board to said cover body is provided, introduced in single file in front Symbol cable relative to the cable insertion groove from the outside of the cover body a guide groove for pre-Symbol integrally formed so as to communicate with the cable insertion groove, wherein the cable insertion groove is formed as an elongated rectangular cross section of the tubular body in a direction perpendicular to the guide groove, said cable Is bent and introduced from the guide groove into the cable insertion groove, and the cable itself closes the communication port between the cable insertion groove and the guide groove while being accommodated in the cable insertion groove. The body to be. The housing according to claim 1,
The opening on the outside of the housing of the cable insertion groove is made smaller than the opening on the inside of the housing, and an external force acting on the plurality of cables connected to the stored electric circuit board is applied to the opening end on the outside of the housing The casing is supported by and prevents transmission to the connecting portion of the electric circuit board.

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