JPH0142301Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an improvement of a waterproof connector used in environments susceptible to the influence of outside air such as the engine room of a car. The present invention relates to an improvement in a sealing member that provides watertightness between the electrical wire and the electrical wire.

In general, connectors that are used in environments where rainwater is likely to enter, such as the engine room of a car, or in environments with high humidity can allow water to enter the connector and cause water to enter the electrical connectors inside the part. It must have a waterproof structure to prevent adhesion.

Thus, as shown in FIG. 1, a generally cylindrical rubber plug b corresponding to the wire insertion hole a, which is formed by a wall with a substantially cylindrical structure, is fitted into the wire insertion hole of the conventional connector housing. , the part concerned is made watertight.

The above-mentioned rubber stopper b has an appropriate number of concave lines c, c'... and protrusions d, d', d''... running in the upper circumferential direction on its outer circumferential surface alternately provided in the axial direction. It constitutes a watertight part h, and an appropriate number of through holes f and f' are provided in the central part to pass through in the axial direction to allow the electric wires e and e' to pass through. The watertight part g of the above structure is constituted, but as shown in Fig. 2, for example, the electric wires e, e'...
When bent at a large angle with respect to the axis of
A gap may be created between the electric wires e, e', etc., and the watertightness thereof may be broken.

In view of the above-mentioned drawbacks, the present invention aims to eliminate the above-mentioned drawbacks by providing a sealing member that maintains its watertightness even when the electric wire is bent at a large angle with respect to the axis of the connector housing. It is.

A first embodiment of the present invention will be described below with reference to FIG.

1 is in close contact with the inner circumferential surface of the wire insertion opening 3 of the connector housing 2, and has a watertight property between the first watertight portion 4 and the outer circumferential surface of the electric wires 11 and 11', and is in close contact with the inner circumferential surface of the wire insertion opening 3 of the connector housing 2, and has a watertight property between the first watertight portion 4 and the This is a sleeve main body comprising a second watertight portion 5 having watertight properties at the front end and the rear end thereof, respectively, with appropriate intervals between the sleeve body and the second watertight portion 5.

The sleeve main body 1 has a considerable length in the axial direction, and the outer diameters of the front and rear ends are larger than those of the central part.

The central portion is hollow inside and has a thin outer peripheral wall, making it deformable at that portion.

A hole 6 is formed at the front end of the sleeve body 1 and is connected to the hollow part of the central part. A hollow portion having an inner diameter of 100 mm can be formed by force with a mold.

The hole 6 has the minimum inner diameter determined as described above, and is gradually expanded toward the front.

In addition, on the outer peripheral surface of the front end of the sleeve main body 1,
Appropriate number of concave lines 7, 7' running in the upper circumferential direction of the outer circumferential surface...
and protrusions 8, 8', . . . are provided alternately in the axial direction of the sleeve body 1, forming a first watertight portion 4.

On the other hand, at the rear end of the sleeve body 1, there are an appropriate number of through holes 10, 10' connected to the hollow part of the central part.
is passed through the connector housing 2, and the electric wires 11, 11' are tightly introduced into the connector housing 2 through the through hole 10.

On the inner circumferential surface of the through holes 10, 10'..., an appropriate number of grooved lines 13, 13'... running in the circumferential direction and protruding lines 14, 14'... are provided alternately in the axial direction. A second watertight portion 5 is formed.

The sleeve main body 1 has its front end fitted into the wire insertion hole 3, and closely contacts the inner peripheral surface of the wire insertion hole 3 with the first watertight portion 4, and has a watertight structure to maintain watertightness in that portion. Also, the electric wires 11, 11'... are inserted through the through holes 10, 10'... at the rear end, and the electric wires 11, 11' are inserted through the second watertight part.
..., and its watertight structure ensures watertightness in that part.

In this manner, the sleeve main body 1 ensures watertightness between the inner circumferential surface of the wire insertion port 3 of the connector housing 2 and the wires 11, 11'... inserted through the wire insertion port 3. It is.

For example, as shown in FIG. 4, electric wires 11, 11', .
Even if the sleeve main body 1 is bent at a large angle with respect to the axis of
The watertight structure with 11' is not affected and its watertightness is ensured.

Fig. 5 shows the sleeve body 1 according to the present invention.
In the second embodiment, this sleeve body 1 is suitable for an electric wire 15 called a tubed wire in which two covered electric wires 13 and 13' are covered with a sheath 14.

That is, there is one through hole at the rear end of the sleeve body 1, and its inner diameter corresponds to the outer diameter of the sheath 14.

The sheath 14 is stripped in the hollow part in the center of the sleeve body 1, and the sheath 14
3 and 13' are mutually separated from the relevant part,
Each cavity 1 in the connector housing 2
6, 16' for connection with electrical connectors 17, 17' housed in the terminals 6, 16'.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views of a conventional waterproof connector, FIG. 3 is a cross-sectional view of the sleeve body and connector according to the present invention, FIG. 4 is a cross-sectional view of the same in use, and FIG. The figure is a sectional view showing another embodiment of the sleeve body according to the present invention together with a connector. 1... Sleeve body, 4... First watertight part, 5...
...Second watertight section.

Claims (1)

[Scope of utility model registration request] In a sleeve body having a first watertight part that comes into close contact with the inner peripheral surface of the wire insertion opening of the connector housing and a second watertight part that comes into close contact with the outer peripheral surface of the wire, the first and second watertight parts are connected to each other through an intermediate thin part. It is provided at the front end and the rear end, and when the first watertight part is fitted into the wire insertion hole, the second watertight part is located outside of the wire insertion hole. Sleeve for waterproof connectors.