JPH0765910A - Waterproof grommet positioning structure - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a waterproof grommet positioning structure capable of reliably positioning a waterproof grommet for an automobile or the like and a connector and assembling the connector to a panel. [Constitution] Grommet fitting wall 2 of connector housing 1
The positioning pin 3 is projected on the grommet, and the fitting hole 6 for the positioning pin is penetrated through the elastic waterproof grommet 4 to be fitted to the grommet fitting wall, and the length of the positioning pin 3 is determined from the depth of the fitting hole 6. It will also be set longer. Then, the color of the positioning pin 3 is set to be a color conspicuous with respect to the waterproof grommet 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof grommet positioning structure for positioning a waterproof grommet for an automobile or the like and a connector and assembling the connector to a panel.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional waterproof grommet positioning structure. According to this structure, the bellows portion 15a of the rubber waterproof grommet 15 is aligned with the protruding direction of the electric wire bundling protruding portion 14a of the rear holder 14 which is mounted on the connector housing 13 to prevent the terminal from coming off.

However, when the rear holder 14 is not used, the connector 13 may be fitted in the grommet 15 upside down. In that case, as shown in FIG. 5, a pair of mating connectors 16, 17 are provided. The assembly position is reversed,
The electric wire 18 on the mating connectors 16 and 17 side is pulled, and it is difficult to assemble the connector 13 to the panel 19 such as an automobile door. Also, as shown in FIG. 6, the grommet 1
Connector 1 with the bellows part 15a of No. 5 twisted 180 °
There is also a problem that 3 is assembled to the panel 18, and a gap is formed between the grommet 15 and the connector 13 to deteriorate the waterproof property.

[0004]

In view of the above-mentioned problems, the present invention can reliably position the waterproof grommet and the connector without using the rear holder, and the connector can be turned upside down on the panel. It is an object of the present invention to provide a positioning structure for a waterproof grommet that can be assembled without a gap and that does not cause a gap between the grommet and the connector.

[0005]

In order to achieve the above object, the present invention provides an elastic waterproof grommet in which a positioning pin is provided on a grommet mating wall of a connector housing so as to project from the grommet mating wall. A waterproof grommet positioning structure is basically formed by penetrating a fitting hole for the positioning pin and setting the length of the positioning pin longer than the depth of the fitting hole. And, it is also effective to make the color of the positioning pin conspicuous with respect to the waterproof grommet.

[0006]

When the grommet is fitted into the connector housing, the positioning pin of the grommet fitting wall is engaged with the fitting hole of the grommet to align the connector and the grommet. The tip of the positioning pin projects to the outside from the fitting hole, and functions as a positioning visual confirmation portion when the connector is assembled to the panel. Further, the positioning pin penetrates and engages with the fitting hole of the grommet to prevent the grommet from rolling and a gap from occurring.

[0007]

1 to 3 show an embodiment of a positioning structure for a waterproof grommet according to the present invention. This structure is
As shown in FIG. 1, a positioning pin 3 is integrally provided on a flange-shaped grommet fitting wall 2 formed in the rear part of a connector housing 1 made of a synthetic resin, and a rubber waterproof fitting to the grommet fitting wall 2 is fitted. On the ring wall 5 at the front end of the grommet 4,
It is characterized in that the fitting hole 6 for the positioning pin 3 is provided so as to penetrate therethrough.

The positioning pin 3 is erected vertically from the outer peripheral surface 2a at the upper end of the grommet fitting wall 2, and the length of the positioning pin 3 is set longer than the depth of the fitting hole 6 of the grommet 4. . Then, as shown in FIG. 2, the positioning pin 3 is engaged with the fitting hole 6 to position the grommet 4 and the connector 7. Further, when the connector 7 is assembled to the panel 8, the positioning pin 3 is located at the upper end of the grommet 4, and the pin tip 3a is projected from the fitting hole 6 to the outside.

As a result, the operator can visually check the tip 3a of the positioning pin 3 as shown in FIG. 3, and confirm that the connector 7 is turned over by 180 ° and is not attached to the grommet 4. The positioning pin 3 has a thin tip 3a as shown in FIG.
The base end 3b is formed in a thick shape, and the fitting hole 6 of the grommet 4 has a press-fitting lip 6a for the thin end 3a.
Therefore, the sealing property is improved.

While the color of the grommet 4 is black,
The color of the positioning pin 3, that is, the connector housing 1 is set to white, which makes it easy to visually confirm the pin tip 3a. Further, the positioning pin 3 is provided on the ring wall 5 of the grommet 4.
Since the ring wall 5 and the grommet fitting wall 2 of the connector housing 1 are firmly coupled to each other, the ring wall 5 is prevented from being rolled up, and the waterproof property is improved.

A peripheral lip 9 for the panel is formed at the front end of the ring wall 5, and flexible lock arms 10 formed at the upper, lower, left and right sides of the connector housing 1 are provided in the panel hole 8.
Assembly of the connector 7 is achieved by engaging with a,
At the same time, the circumferential lip 9 comes into close contact with the panel 8 to exert waterproofness.

[0012]

As described above, according to the present invention, the positioning pin of the connector housing and the fitting hole of the grommet are engaged with each other to ensure the positioning of the grommet and the connector, thereby improving the positioning workability and the working accuracy. improves. Further, by visually confirming the positioning pin protruding from the grommet to the outside, twisted assembly of the grommet with respect to the panel and reverse assembly of the connector are prevented. Further, since the positioning pin penetrates the grommet and engages with the grommet, the grommet is prevented from being rolled up and a gap is prevented, and the waterproof property is improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a positioning structure for a waterproof grommet according to the present invention.

FIG. 2 is a vertical cross-sectional view showing an assembled state of the same.

FIG. 3 is a plan view showing a state in which the tip of a positioning pin is visually checked.

FIG. 4 is a plan view showing a conventional example.

FIG. 5 is a plan view similarly showing a defective state.

FIG. 6 is a plan view showing another problem as well.

[Explanation of symbols]

 1 Connector housing 2 Grommet fitting wall 3 Positioning pin 4 Waterproof grommet 6 Fitting hole

Claims (2)

[Claims] 1. A positioning pin is projected from a grommet fitting wall of a connector housing, and an elastic waterproof grommet fitted to the grommet fitting wall is provided with a fitting hole for the positioning pin. The waterproof grommet positioning structure is characterized in that the length is set to be longer than the depth of the fitting hole. 2. The waterproof grommet positioning structure according to claim 1, wherein the color of the positioning pin is a color conspicuous with respect to the waterproof grommet.