JPH0525779U - Cable retainer - Google Patents

Abstract

(57) [Summary] [Purpose] Even when the cable is pulled, the cable is securely held in the case. [Structure] The bushing 16 has a main portion 17 and an engagement piece portion 18
The retaining portion 19 is integrally formed. In this one,
With the main portion 17 of the bush 16 fitted to the outer peripheral surface of the cable 15, the retaining portion 19 and the engaging piece portion 18 are attached to the case 11.
When inserted into the through hole 14 of the engaging piece portion 18, the claw portion 1 of the engaging piece portion 18 with the inner surface of the engaging piece portion 18 in contact with the outer peripheral surface of the cable 15.
8a engages with the inner surface 11a of the case 11, and the biting portion 19a of the retaining portion 19 bites into the outer peripheral surface of the cable 15 to fix the cable 15 to the bush 16.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a cable holding device for holding a cable led out to the outside through a through hole of a case.

[0002]

[Prior Art]

 Conventionally, for example, in a pressure sensor or the like, a pressure sensor main body including a pressure sensor element and a processing circuit is housed in a case, and a cable connected to the pressure sensor main body is externally passed through a through hole provided in the case. I am trying to derive it.

In this device, it is necessary to hold the cable in the case, and therefore a cable holding device is used. The conventional configuration of the cable holding device will be described below with reference to FIG.

A case 1 for accommodating a pressure sensor body (not shown) has a through hole 2 formed therein, and an L-shaped cross-section is formed toward the outside of the case 1 so as to correspond to the through hole 2. The formed tubular portion 3 is provided in a protruding manner, and the portion surrounded by the inner peripheral surface of the tubular portion 3 and the outer surface of the case 1 forms a concave fitting portion 4.

On the other hand, a ring-shaped packing 6 having elasticity is press-fitted to the outer peripheral surface of the cable 5, and when the packing 6 is fitted in the fitting portion 4, the bush 7 is pushed into the tubular portion 3. The packing 6 is pressed by the pressing piece 7a provided on the bush 7 to hold the cable 5, and the engaging piece 7b having an L-shaped cross section provided on the bush 7 is attached to the tubular portion 3. As a result, the pressed state is maintained, and the cable 5 is held in the case 1 with respect to the case 1.

[0006]

[Problems to be solved by the device]

 However, in the prior art, since the engaging piece portion 7b of the bush 7 is freely deformable to the outside, when the cable 5 is strongly pulled in the direction of arrow A, the bush 7 is pulled via the pressing piece portion 7a, and the bush 7 is pulled. The engaging piece portion 7b of 7 may bend outward and the bush 7 may come off the case 1. Then, the packing 6 comes off and the cable 5 cannot be held in the case 1.

Further, since the cable 5 is only press-fitted into the packing 6 having a smooth inner peripheral surface, as described above, when the cable 5 is strongly pulled in the direction of arrow A, the bush 7 is inserted into the case 1. The cable 5 may come out of the packing 6 even though it is engaged with.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a cable holding device capable of reliably holding a cable in a case even when a tensile force acts on the cable. is there.

[0009]

[Means for Solving the Problems]

 The present invention relates to a cable holding device including a case having a through hole, a cable led out to the outside through the through hole of the case, and a bush for holding the cable in the through hole portion. A ring-shaped main part to be fitted to the cable, the main part being integrally formed along the axial direction of the main part so as to bite into the outer peripheral surface of the cable in response to the insertion into the through hole. Is provided integrally with the main portion along the axial direction of the main portion, and engages with the inner surface of the case while being in contact with the outer peripheral surface of the cable by being inserted into the through hole. It is characterized by the provision of a joint piece.

[0010]

[Action]

 According to the above means, the main portion of the bush is fitted to the cable, and in this state, when the stopper portion of the bush and the engaging piece portion are inserted into the through hole of the case, the engaging piece portion of the bush is attached to the inner surface of the case. And the bush is fixed to the case.

In this state, since the inner surface of the engaging piece portion is in contact with the outer peripheral surface of the cable, even if the cable is pulled and the tensile force acts on the engaging piece portion of the bush, Does not bend inward (the cable direction), which is the pull-out direction.

Further, as described above, when the retaining portion is inserted into the through hole, the retaining portion is pressed against the peripheral wall of the through hole and bites into the outer peripheral surface of the cable, so the cable is fixed to the bush by the retaining portion. This prevents the cable itself from slipping out of the bush.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. First, in FIGS. 1 and 2, reference numeral 11 denotes a case for accommodating a pressure sensor main body (not shown) including a pressure sensor element and a processing circuit, which is made of a resin such as ABS. A cylindrical portion 13 is integrally projectingly provided on the back wall portion 12 of the case 11 toward the outside of the case 11, and a through hole 14 is formed so as to penetrate the back wall portion 12 and the cylindrical portion 13. Has been done. Here, four groove portions 14 a (see FIG. 5) extending in the axial direction are formed on the peripheral wall of the through hole 14.

On the other hand, the cable 15 is formed by covering a plurality of (three in the present embodiment) core wires 15 a with a jacket 15 b, and a bush 16 is fitted on the outer peripheral surface of the cable 15. There is.

The bush 16 is made of a resin such as ABS, and has an annular main portion 17 fitted to the outer peripheral surface of the cable 15 and two engagement members integrally formed with the main portion 17. It is composed of a piece portion 18 and two retaining portions 19.

The engagement piece portion 18 is arranged to face the edge portion of the main portion 17, and is formed along the axial direction of the main portion 17. The distance L1 between the inner surfaces of the engaging piece portions 18 is set to be substantially the same as the outer diameter dimension of the cable 15, and the engaging piece portion 18 is provided at the tip end thereof so as to project outward. It has a claw portion 18a.

On the other hand, the retaining portion 19 is arranged to face the edge of the main portion 17, and is formed along the axial direction of the main portion 17. The retaining portion 19 has a plurality of biting portions 19a having a serrated cross section inside thereof, and as shown by the chain double-dashed line in FIG. It is set to be smaller than the outer diameter dimension of. In this case, in the pair of retaining portions 19, the biting portions 19a formed on them are arranged alternately so as not to face each other.

It should be noted that inclined surface portions 18b and 19b are respectively formed at the tips of the engaging piece portion 18 and the retaining portion 19, and the end portions of the through holes 14 correspond to the inclined surface portions 18b and 19b. The inclined surface 14b is formed.

Next, the operation of the above configuration will be described. That is, in order to fix the cable 15 to the case 11, the main portion 17 of the bush 16 is inserted into the outer peripheral surface of the cable 15 as shown in FIG. Then, as shown in FIG. 3, the retaining portion 19 is pressed against the outer peripheral surface of the cable 15 to expand.

As shown in FIG. 4, the groove portions are formed in a state where the inclined piece portions 18 b and 19 b of the engaging piece portion 18 and the retaining portion 19 of the bush 16 are brought into contact with the inclined surface 14 b of the through hole 14, respectively. When pushed along 14a, the claw portion 18a of the engaging piece portion 18 is engaged with the inner surface 11a of the case 11 while the inner surface of the engaging piece portion 18 and the outer peripheral surface of the cable 15 are in contact with each other. Is fixed to the case 11 in a retaining state. Further, as the retaining portion 19 is inserted into the through hole 14, the outer surface of the retaining portion 19 is pressed by the peripheral wall of the through hole 14, so that the biting portion 19a of the retaining portion 19 covers the cable 15b. Then, the cable 15 is fixed to the bush 16 in a retaining state.

According to the above configuration, the following effects can be obtained. That is, even if the cable 15 is strongly pulled in the direction of the arrow B and the tensile force acts on the engaging piece portion 18 of the bush 16, the inner surface of the engaging piece portion 18 is in contact with the outer peripheral surface of the cable 15. Therefore, the engagement piece portion 18 does not bend inward (toward the cable 15) which is the pulling direction. Therefore, unlike the conventional example in which the engaging piece portion of the bush is deformable to the outside, the bush 16 does not come off from the case 11.

Moreover, since the cable 15 is retained in the bush 16 in the retaining state by the biting portion 19a of the retaining portion 19, the cable 15 is prevented from being pulled out and pulled out. Therefore, the cable is retained by the packing. Unlike the conventional example, the cable 15 can be securely held in the case 11 even when a tensile force is applied to the cable 15.

Further, particularly in this embodiment, since the groove portion 14a is formed in the peripheral wall of the through hole 14 and the engaging piece portion 18 and the retaining portion 19 are inserted into the groove portion 14a, the engagement by the groove portion 14a is made. There is also an effect that the bushing 16 is fixed in the rotation stop state by locking the piece portion 18 and the retaining portion 19.

Further, since the bite portions 19a in the retaining portion 19 are formed in an alternating manner, as shown in FIG. 1, when the bite portion 19a bites into the cable 15, without damaging the core wire 15a, The cable 15 can be held by the retaining portion 19.

In the above embodiment, two engaging piece portions 18 and two retaining pieces 19 are provided, but three or more may be provided.

[0026]

[Effect of the device]

 As is clear from the above description, according to the cable holding device of the present invention, the main part of the bush fitted in the cable has a plurality of retaining portions that bite into the outer peripheral surface of the cable, and the outer peripheral surface of the cable. Since a plurality of engaging pieces that engage with the inner surface of the case in contact with the case are formed and these engaging pieces and the retaining part are inserted into the through holes of the case, the cable is pulled. It will not come off and will therefore have the excellent effect that the cable can be held securely in the case.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the main part

FIG. 3 is a view corresponding to FIG. 1 showing a state where a bush is inserted in the cable.

FIG. 4 is a view corresponding to FIG. 1 showing a state in which the bush is inserted into the through hole.

FIG. 5 is an exploded perspective view of a main part

FIG. 6 is a view corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

In the drawings, 11 is a case, 11a is an inner surface, 14 is a through hole,
Reference numeral 15 is a cable, 16 is a bush, 17 is a main portion, 18 is an engaging piece portion, 18a is a claw portion, 19 is a retaining portion, and 19a is a biting portion.

Claims (1)

[Scope of utility model registration request] 1. A case having a through hole, a cable led out to the outside through the through hole of the case, and a bush for holding the cable in the through hole portion, the bush being attached to the cable. The fitted annular main portion, a plurality of retaining portions integrally formed on the main portion along the axial direction of the main portion, and engaging with the outer peripheral surface of the cable in response to the insertion into the through hole; A plurality of engaging piece portions that are integrally formed along the axial direction of the portion and that engage with the inner surface of the case while being in contact with the outer peripheral surface of the cable by being inserted into the through hole. A cable holding device characterized by the above.