JP3299637B2 - connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector in which a joint between a male housing and a female housing is waterproof and an elastic body is interposed to prevent rattling of the joint.

[0002]

2. Description of the Related Art As a conventional connector of this type, for example, a connector shown in FIG. 4 is known. Is fitted with a tubular elastic body 5 for waterproofing. A flange portion 5a is provided at a rear portion of the cylindrical elastic body 5, and a rear end of the flange portion 5a is brought into contact with the regulating portion 6, and a front end is pressed by a pressing member 7 separate from the female housing 1. ing. A male housing 9 having an insertion connection terminal 8 is fitted around the outer periphery of the pressing member 7 and the cylindrical elastic body 5, and at the same time, the locking projection 10 of the male housing 9 and the locking of the female housing 1 are locked. Arm 11 is engaged.

The distance between the end face 5b of the flange portion 5a of the cylindrical elastic body 5 and the engaging face 11a of the locking arm 11 is determined by the distance between the end face 9a of the male housing 9 and the engaging face 10a of the locking projection 10. And is shorter than the distance. Thereby, when the female housing 1 and the male housing 9 are connected, the end surface 9a of the male housing 9 presses the end surface 5b of the flange portion 5a of the cylindrical elastic body 5, and after the flange portion 5a is deformed. The locking projection 10 and the locking arm 11 are engaged. The restored flange portion 5a eliminates a gap between the locking projection 10 and the locking arm 11, and at the same time, the flange portion 5a of the tubular elastic body 5
Will be in a state of being energized.

[0004]

However, in the above-mentioned conventional example, since the thickness of the flange portion 5a of the tubular elastic body 5 is small, the locking projection 10 is not attached to the locking arm 1.
There is a problem that the male housing 9 must be pressed with a strong force in order to deform the flange portion 5a until the flange portion 5a is engaged. In addition, since the portion where the flange portion 5a is restored is small, the joint between the male housing 9 and the female housing 1 is rattled, and the cylindrical elastic member 5 is formed.
However, there is a problem that the waterproof property is also deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, to easily connect a male housing and a female housing, to maintain good waterproofness of a connecting portion, and to surely prevent rattling. It is to provide a connector capable of.

[0006]

In order to achieve the above object, a connector according to the present invention has a fitting hole provided with a terminal portion of a first connection terminal and a first connection terminal provided with a locking projection.
A second housing having a housing for accommodating a second connection terminal fitted in the fitting hole and connected to the first connection terminal, and having a locking arm engaged with the locking projection. And a cylindrical elastic body fitted on the outer periphery of the cylindrical portion and waterproofing the space between the first and second housings. A pressing portion that presses the front end of the tubular elastic body, and a regulating portion that contacts the rear end of the tubular elastic body to regulate the movement of the tubular elastic body. The length is larger than the distance between the pressing portion and the regulating portion when the housings are coupled to each other, and when the housings are coupled to each other, the cylindrical elastic body is compressed between the pressing portion and the regulating portion. The housings are in opposite directions The elastic force of the cylindrical elastic body acts in a direction in which the locking projection and the locking arm engage with each other, and when the coupling between the housings is released, the elastic force of the cylindrical elastic body is increased. Act in a direction to separate the housings from each other.

[0007]

In the connector having the above-described structure, the cylindrical elastic body is fitted to the cylindrical part of the female housing, and the male part is fitted so that the cylindrical part and the cylindrical elastic body fit into the fitting holes of the male housing. When the mold housing and the female housing are pressed, the restricting portion abuts on the rear end of the cylindrical elastic body to restrict the movement thereof, and the pressing portion of the male housing presses the front end surface of the cylindrical elastic body. The elastic body is compressed and the locking projection and the locking arm engage. When the pressing force is released, the cylindrical elastic body is restored and urges the male housing and the female housing outward, and the locking projection and the locking arm are engaged in an urged state, and at the same time, the cylindrical The front end surface of the elastic body is in close contact with the pressing portion of the male housing, and the rear end surface is in close contact with the regulating portion of the female housing.

[0008]

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 longitudinal sectional view of the present embodiment,
This shows a state before the male housing 21 and the female housing 22 are combined. The male housing 21 is provided with a cylindrical portion 31 facing the coupling side. Inside the cylindrical portion 31, a large-diameter coupling portion 31a, a step portion 31b, and a small-diameter coupling portion 31c are provided.
Are formed. A locking projection 32 is formed on the outer surface of the cylindrical portion 31 in a direction substantially perpendicular to the coupling direction, and a rear surface of the locking projection 32 is an engagement surface 32a. In such a male housing 21, the insertion connection terminal 33 is accommodated.

On the other hand, the female housing 22 has an inner cylindrical portion 41 fitted into the small-diameter fitting hole 31c of the male housing 21;
The outer cylinder 4 that receives the cylinder 31 between the inner cylinder 41 and the inner cylinder 41.
2 is provided, and a flange-shaped restricting portion 43 is provided at the base of the inner cylindrical portion 41. The inside of the inner cylindrical portion 41 is a terminal receiving hole 44, and a flexible locking lance 45 is formed in the terminal receiving hole 44. This locking lance 45
Is for preventing a receiving connection terminal (not shown) accommodated in the terminal accommodation hole 44 from coming off backward. Also, the inner cylindrical portion 41
A locking arm 46 for engaging with the locking projection 32 of the male housing 21 is provided between the outer cylindrical portion 42 and the outer cylindrical portion 42. The locking arm 46 has a fitting groove 46a into which the locking projection 32 is fitted, and an engagement surface 46b with which the engagement surface 32a of the locking projection 32 engages.

A waterproof cylindrical elastic member 47 made of, for example, synthetic rubber is fitted on the outer periphery of the inner cylindrical portion 41. A plurality of ridges 47a are formed at the front of the cylindrical elastic member 47, and the outer periphery of these ridges 47a is brought into close contact with the large-diameter joint 31a of the male housing 21. A flange portion 47b is formed at a rear portion of the cylindrical elastic member 47, and a rear end surface 47c is in close contact with a front end surface 43a of the restricting portion 43 of the female housing 22.

Here, the length of the cylindrical elastic member 47 in the connecting direction is set to a length which is appropriately compressed when the locking projection 32 and the locking arm 46 are engaged. That is, as shown in FIG. 2, the male housing 21 is pressed against the female housing 22 in the connecting direction, and the locking projections 32 are provided.
When a distance d occurs between the engaging surface 32a of the male arm 21 and the engaging surface 46b of the locking arm 46, the step 31b of the male housing 21 presses the front end surface 47d of the cylindrical elastic member 47, and The elastic body 47 has a length at which the compression amount D + d occurs. Then, when the pressing force is released, the compression amount D remains.

The male housing 21 thus constructed
When the female housing 22 and the female housing 22 are connected, the cylindrical elastic member 47 is attached to the inner cylindrical portion 41 of the female housing 22 by the flange portion 4.
The male housing 21 is fitted into the female housing 21 such that the inner cylindrical portion 41 and the cylindrical elastic body 47 are fitted into the small-diameter fitting portion 31c and the large-diameter fitting portion 31a of the male housing 21, respectively. Push into housing 22.

As a result, the stepped portion 31b is
7 is pressed against the front end surface 47d, and the cylindrical elastic member 47 is compressed by a compression amount D + d in the connecting direction. At the same time, the locking projection 32 is fitted into the fitting groove 46a of the coupling arm 46, and the engagement surface 32a of the locking projection 32 and the engagement surface 46b of the locking arm 46 face each other at a distance d according to the pressing force. When the pressing force is released, the male housing 2 is restored by the restoring force of the cylindrical elastic member 47 having the compression amount D as shown in FIG.
1 and the female housing 22 are urged outward, and the engaging surface 32a of the locking projection 32 and the engaging surface 4 of the locking arm 46 are engaged.
6b are engaged in a biased state. In this process, the connection terminals between the respective housings 21 and 22 are of course fitted.

As described above, in the present embodiment, when the male housing 21 and the female housing 22 are connected to each other, not the flange portion 47b of the cylindrical elastic member 47 but the front end surface 47d.
Is pressed, the number of parts to be compressed increases compared to the flange portion 47b, and the pressing force can be reduced. In addition, the front end surface 47d of the cylindrical elastic member 47 comes into close contact with the step portion 31b by the large restoring force of the cylindrical elastic member 47, and the rear end surface 47c of the flange portion 47b is
7 so as to be in close contact with the front end surface 43a of the male housing 21.
The rattling between the female housing 22 and the female housing 22 can be prevented, and the waterproof property can be improved. Further, when the housings 21 and 22 are released from each other, a force acting to dissociate the two acts by the elastic force of the tubular elastic member 47.

[0015]

As described above, in the connector according to the present invention, the cylindrical elastic body is fitted to the cylindrical portion of the female housing, and this cylindrical elastic body is connected to the pressing portion of the male housing and the female housing. Since the locking projection and the locking arm are engaged with each other in a compressed state between the restricting portions, the engagement force between the locking projection and the locking arm can be improved by the restoring force of the cylindrical elastic body, and at the same time, The adhesion between the cylindrical elastic body and the male housing and between the cylindrical elastic body and the female housing can be improved. Therefore, it is possible to prevent the joint between the male housing and the female housing from rattling and to improve the waterproofness.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment before being combined.

FIG. 2 is an operation explanatory view.

FIG. 3 is a sectional view after coupling.

FIG. 4 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Male housing 22 Female housing 31 Tube part 31a Large diameter fitting part 31b Step part 31c Small diameter fitting part 32 Locking projection 41 Inner cylinder part 42 Outer cylinder part 43 Restriction part 44 Terminal accommodation hole 46 Locking arm 47 cylinder Elastic member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-45274 (JP, U) JP-A-6-1336071 (JP, U) JP-A 2-98475 (JP, U) JP-A 2-98475 86074 (JP, U) Japanese Utility Model 63-176281 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 13/52 H01R 13/639

Claims (1)

(57) [Claims] 1. A as having a fitting hole in which a terminal portion of the first connecting terminal and the first housing having a locking projection both the combined first connection terminals fitted into the fitting hole Connecting
A second housing having a cylindrical portion for accommodating a second connection terminal and having a locking arm engaged with the locking projection; and the first and second housings fitted on the outer periphery of the cylindrical portion .
A connector comprising a cylindrical elastic body for waterproofing between the housings, wherein a pressing portion for pressing a front end of the cylindrical elastic body is provided in a fitting hole of the first housing;
The second housing is provided with a restricting portion that contacts the rear end of the cylindrical elastic body and restricts the movement of the cylindrical elastic body.
The pressing portion and the rule when the housings are connected to each other are
Larger than the gap between the housing and the housing.
During engagement, the tubular elastic body is compressed between the regulating portion and the pressing portion, wherein the housing between the opposite sides to each other
And the resilient force of the cylindrical elastic body acts in a direction in which the locking projection and the locking arm engage with each other.
When releasing the coupling between the housings, the cylindrical elastic body
A connector characterized in that an elastic force acts in a direction in which the housings are separated from each other .