JPH0896878A - Connector - Google Patents

Abstract

PURPOSE: To prevent the occurrence of looseness between housings. CONSTITUTION: The coupling projection 31 of a male housing 21 is internally provided with a coupling hole 32, and a lock projection 33 is formed on the external surface of the projection 31. Also, the internal surface of the hole 32 is used as a coupling surface 32a, and the deep end thereof is used as a pressing surface 32b. On the other hand, a seal member 50 is coupled to the inner cylinder 41 of a female housing 22, and a front holder 51 with a front end having a built-in elastic material 52 of rubber packing is fitted to the cylinder 41. When both housings 21 and 22 are coupled to each other, the lock projection 33 comes to be engaged with a lock arm 49, and the surface 32a presses the seal member 50, the holder 51 and the external surface of the material 52. Furthermore, the surface 32b presses the edge of the material 52. According to this construction, the material 52 is positioned in a gap between both housings 21 and 22 for preventing the looseness thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector provided with a front holder for pressing a locking lance for locking a connection terminal housed in a housing in a locking direction.

[0002]

2. Description of the Related Art Conventionally, a so-called multi-pole connector for accommodating connection terminals to which electric wires are connected in a plurality of rows has been widely used in connectors used for wiring of automobiles, for example, as shown in a sectional view of FIG. , Female housing 1 and male housing 2
There is known a connector in which

In this case, the electric wire 4 is connected to the terminal accommodating hole 3 of the female housing 1 and the waterproof sealing material 5 is used.
The receiving / connecting terminals 6 mounted with are accommodated, and these receiving / connecting terminals 6 are locked by the locking lances 7 to prevent the receiving / connecting terminals 6 from coming out backward.

A seal member 9 for waterproofing the connecting portion of the female housing 1 and the male housing 2 and a locking lance 7 are provided on the outer periphery of the inner cylindrical portion 8 of the female housing 1 in the locking direction. The front holder 10 for pressing is sequentially fitted, and the seal member 9 is compressed between the front holder 10 and the restriction portion 11 provided in the female housing 1 to reinforce the sealing force, The locking lance 7 has its locking force reinforced by being pressed by the pressing protrusion 10a of the front holder 10.

A fitting protrusion 13 of the mating male housing 2 having a fitting hole 12 therein is fitted around the outer periphery of the seal member 9 and the front holder 10. As a result, the insertion connection terminal 1 housed in the male housing 2
The insertion portion 4 is inserted into the receiving / connecting terminal 6, and the locking projection 15 of the male housing 2 and the locking arm 16 of the female housing 1 are engaged. Further, in the coupling portion of the female housing 1 and the male housing 2, the inside of the housings 1 and 2 is waterproofed by the seal member 9, and the locking projection 15
The locking arm 16 prevents the housings 1 and 2 from being separated from each other.

[0006]

However, in the above-mentioned conventional example, when there is a gap between the female housing 1 and the male housing 2, the rattling between the female housing 1 and the male housing 2 causes the receiving and connecting terminal 6 to be inserted. There is a problem that the contact surface of the plug-in connection terminal 14 slides, the receiving connection terminal 6 and the plug-in connection terminal 14 vibrate to cause metal fatigue, and contact failure occurs between them.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a connector which prevents rattling of a coupling portion between a male housing and a female housing.

[0008]

To achieve the above object, a connector according to the present invention comprises a first housing having a locking lance for locking the accommodated connection terminal, and a locking direction of the locking lance. A front holder made of synthetic resin, which is fitted to the connecting side of the first housing to press the first housing, and a second male housing which is fitted to the first housing. The front holder is provided with an elastic body for preventing rattling of the second housing.

[0009]

In the connector having the above structure, the front holder is provided with the elastic body, so that rattling between the housings is prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a sectional view of a male housing 21 and a female housing 22 in a coupled state, and FIG. 2 is a sectional view before they are coupled. A cylindrical fitting protrusion 31 is provided on the coupling side of the male housing 21, a fitting hole 32 is formed inside the fitting protrusion 31, and an outer peripheral surface of the fitting protrusion 31 extends in the coupling direction. A lock protrusion 33 is formed in a direction perpendicular to the lock protrusion 33. The inner peripheral surface of the fitting hole 32 is a fitting surface 32a, and the inner part thereof is a pressing surface 32b.
The rear surface of one of the locking projections 33 is an engagement surface 33a. Then, the male housing 21 has the plug-in connection terminal 3
4 are accommodated.

On the other hand, the female housing 22 is provided with an inner cylindrical portion 41 and an outer cylindrical portion 42 facing the coupling side with the male housing 21, and the flange-shaped restricting portion 4 is provided on the outer periphery of the inner cylindrical portion 41.
3 is provided. The inside of the inner tubular portion 41 has a terminal accommodating hole 4
4, the terminal accommodating hole 44 is provided with a flexible locking lance 45. In such a terminal accommodating hole 44, a receiving / connecting terminal 48 to which an electric wire 46 is connected and a waterproof sealing material 47 is attached is accommodated, and is locked by a locking lance 45 to prevent the terminal from coming out backward. There is.

A locking arm 49 is provided above the inner tubular portion 41 and between the outer tubular portion 42 and the coupling arm 33, which projects toward the coupling side with the male housing 21 and engages with the locking projection 33 of the male housing 21. It is provided. The locking arm 49 is formed with a fitting groove 49a into which the locking projection 33 is fitted, and an engaging surface 49b that engages with the engaging surface 33a of the locking projection 33.

Further, on the outer peripheral surface of the inner cylindrical portion 41, a sealing member 50 for waterproofing the connecting portion of the male housing 21 and the female housing 22 and the lower surface of the locking lance 45 are pressed to receive and connect terminals. A front holder 51 for improving the locking force with respect to 48 is fitted. The seal member 50 is formed in a tubular shape from an elastic body such as rubber, and the outer peripheral surface of the seal member 50 is provided with a plurality of ridges 50a.

An elastic body 52 is provided at the front end of the front holder 51.
The front holder 51 and the elastic body 52 are configured as shown in the exploded perspective view of FIG. 3, the assembly perspective view of FIG. 4, and the side view of FIG. That is, the front holder 51 is formed of a synthetic resin material into a shape that can be fitted to the outer periphery of the inner cylindrical portion 41, and the upper wall end surface 61a of the main body 61 of the front holder 51 has engaging holes 62a and 63a, respectively. Engagement protrusions 62, 63 are provided. Further, on the lower wall end surface 61b of the main body 61, an upper projecting piece 64 and a lower projecting piece 65 are provided in parallel to each other, and the upper projecting piece 64 has engaging projections 66, 67 directed toward the lower projecting piece 65 side. It is provided. Further, the locking lance 45 is provided inside the main body 61.
A rearward pressing protrusion 68 for pressing is provided.

The elastic body 52 is, for example, a rubber packing, and its outer peripheral surface substantially coincides with the outer peripheral surface of the front holder 51. The upper wall 71a of the elastic body 52 is provided with engaging portions 72 and 73 which engage with the engaging protrusions 62 and 63 of the front holder 51, respectively, and the lower wall 71b is provided with the engaging protrusions 66 and 67 of the front holder 51. Are provided with engaging portions 74 and 75, respectively.

The front holder 51 and the elastic body 5 as described above
2 is an upper protrusion 64 and a lower protrusion 6 of the front holder 51.
5, the lower wall 71b of the elastic body 52 is fitted, the engaging projections 62 and 63 of the front holder 51 and the engaging portions 72 and 73 of the elastic body 52 are engaged, and the front holder 51 is engaged. The protrusions 66 and 67 are engaged with the engaging portions 74 and 75 of the elastic body 52. Then, the inner cylindrical portion 41 of the female housing 22
After the seal member 50 is fitted to the front holder 51, the front holder 51 in which the elastic body 52 is incorporated is fitted. As a result, the pressing protrusion 68 of the front holder 51 is locked by the locking lance 4.
5 is pressed in the locking direction.

Male housing 21 and female housing 22
When connecting the seal member 50 and the front holder 5
The fitting protrusion 31 of the male housing 21 is fitted to the outer circumferences of the elastic body 52 and the elastic body 52. As a result, the insertion connection terminal 34 is connected to the reception connection terminal 48, and the male housing 21
The fitting surface 32a of the fitting protrusion 31 presses the outer periphery of the seal member 50, the front holder 51, and the elastic body 52, and the pressing surface 32b of the fitting protrusion 31 presses the end surface of the elastic body 52.
At the same time, the locking projection 33 is fitted into the fitting groove 49a of the locking arm 49, and the engagement surface 33a of the locking projection 33 and the engagement surface 49b of the locking arm 49 are restored by the restoring force of the seal member 50 and the elastic body 52. Engage in a biased state.

As described above, in the first embodiment, the elastic body 52
Is present in the gap between the end surface of the front holder 51 and the pressing surface 32b of the male housing 21, so that rattling between the male housing 21 and the female housing 22 can be prevented. Further, the elastic body 52 urges the front holder 51 in the fitting direction, and the pressing projection 68 of the elastic body 52 engages the locking lance 45.
Is strongly pressed, the locking force of the locking lance 45 can be improved.

FIG. 6 shows a front holder 81 of the second embodiment.
7 is a plan view, FIG. 8 is a front view, and FIG.
An elastic body 83 is provided on the front end face of the protrusion 2. As shown in the partially enlarged view of FIG. 9, the elastic body 83 is a plurality of arch-shaped spring bodies integrally projectingly provided on the end surface of the front holder 81, and one end or both ends of the elastic body 83 are formed on the front end surface of the main body 82. It is joined. A pressing protrusion 84 is provided inside the main body 82 as in the first embodiment.

Also in the front holder 81 of the second embodiment, the spring body is provided as the elastic body 83 in the gap between the pressing surface 32b of the male housing 21 and the main body 82 of the front holder 81, so that the first embodiment is performed. It has the same effect as the example.

FIG. 10 shows the front holder 9 of the third embodiment.
1 is a side view of FIG. 1, in which, for example, a ring-shaped rubber packing 93 is fitted around the outer periphery of the main body 92. Here, the outer circumference of the packing 93 is slightly projected from the outer circumference of the main body 92, and the inner circumference is fitted in the circumferential groove of the main body 92. And, like the front holders 51 and 81 described above, the pressing protrusion 94 is provided.

In the front holder 91 of the third embodiment, the packing 93 is interposed in the gap between the outer peripheral surface of the front holder 91 and the fitting surface 32a of the male housing 21,
The rattling of the male housing 21 and the female housing 22 is prevented.

In the above-mentioned embodiment, the elastic body 5
The front holders 51, 81 and 91 are provided with the reference numerals 2, 83 and 93, respectively.
When the inner cylinder portion 41 is not fitted, the elastic bodies 52, 8
You may make it provide 3 and 93 to the front end surface or outer peripheral surface of the inner cylinder part 41, respectively.

[0024]

As described above, in the connector according to the present invention, since the elastic body is provided in the front holder, the rattling of the housings can be prevented when the housings are fitted together. Further, the elastic body biases the front holder, and the front holder presses the locking lance, so that the locking force of the locking lance with respect to the connection terminal can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a state in which a male housing and a female housing of a first embodiment are combined.

FIG. 2 is a cross-sectional view before coupling.

FIG. 3 is an exploded perspective view of a front holder and an elastic body.

FIG. 4 is an assembled perspective view.

FIG. 5 is a side view.

FIG. 6 is a side view of a front holder according to a second embodiment.

FIG. 7 is a plan view.

FIG. 8 is a front view.

FIG. 9 is a partially enlarged view.

FIG. 10 is a side view of a front holder according to a third embodiment.

FIG. 11 is a sectional view of a conventional example.

[Explanation of symbols]

 21 Male Housing 22 Female Housing 31 Fitting Protrusion 32 Fitting Hole 33 Locking Protrusion 34 Insertion Connection Terminal 41 Inner Cylinder 42 Outer Cylinder 48 Receiving and Connecting Terminal 49 Locking Arm 50 Sealing Member 51, 81, 91 Front Holder 52, 83, 93 Elastic body

Claims (3)

[Claims] 1. A first housing having a locking lance for locking the accommodated connection terminal, and a composite fitted to the coupling side of the first housing for pressing the locking lance in the locking direction. A front holder made of resin and a second male type housing fitted to the first housing, and an elastic body for preventing rattling of the first housing and the second housing are provided on the front side. A connector provided on a holder. 2. The connector according to claim 1, wherein the elastic body is a rubber packing attached to a peripheral surface of the front holder. 3. The connector according to claim 1, wherein the elastic body is a spring body integrally provided on an end surface of the front holder.