JP2734497B2 - Positioning structure of waterproof grommet - Google Patents

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 connector between a waterproof grommet and a connector for an automobile or the like and for positioning the connector to a panel when assembling the connector.

[0002]

2. Description of the Related Art FIG. 4 shows a positioning structure of a conventional waterproof grommet. In this structure, the inclination direction of the bellows portion 15a of the rubber waterproof grommet 15 is aligned with the projecting direction of the electric wire binding projection 14a of the rear holder 14 for preventing the terminal from slipping out, which is mounted on the connector housing 13.

However, when the rear holder 14 is not used, the connector 13 may be fitted upside down on the grommet 15. In such a case, as shown in FIG. The mounting position of is reversed,
The electric wires 18 on the mating connectors 16 and 17 are pulled, which causes a problem that it is difficult to mount the connector 13 on a panel 19 such as an automobile door. Also, as shown in FIG.
5 with the bellows part 15a twisted 180 °.
3 may be assembled to the panel 18, and there is a problem that a gap is formed between the grommet 15 and the connector 13 to deteriorate waterproofness.

[0004]

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to reliably position a waterproof grommet and a connector even when a rear holder is not used, and to turn the connector upside down on a panel. It is an object of the present invention to provide a waterproof grommet positioning structure that can be assembled without causing any gap between the grommet and the connector.

[0005]

In order to achieve the above object, the present invention provides an elastic waterproof grommet which has a positioning pin protruding from a grommet fitting wall of a connector housing and is fitted to the grommet fitting wall. A waterproof grommet positioning structure is basically provided in which a fitting hole for the positioning pin is penetrated and the length of the positioning pin is set longer than the depth of the fitting hole. It is also effective to make the color of the positioning pin a color that stands out with respect to the waterproof grommet.

[0006]

When the grommet is fitted to the connector housing, the positioning of the connector and the grommet is performed by engaging the positioning pin of the grommet fitting wall with the fitting hole of the grommet. The tip of the positioning pin protrudes outside from the fitting hole, and functions as a positioning visual confirmation part when assembling the connector to the panel. Further, the positioning pin penetrates into and engages with the fitting hole of the grommet, thereby preventing the grommet from turning up or generating a gap.

[0007]

1 to 3 show an embodiment of a positioning structure for a waterproof grommet according to the present invention. This structure
As shown in FIG. 1, a positioning pin 3 is integrally protruded from a flange-like grommet fitting wall 2 formed at a rear portion of a synthetic resin connector housing 1, and a rubber waterproof fitting is fitted to the grommet fitting wall 2. On the ring wall 5 at the front end of the grommet 4,
It is characterized by being provided through the fitting hole 6 for the positioning pin 3.

The positioning pin 3 is provided upright from the outer peripheral surface 2 a at the upper end of the grommet fitting wall 2, and the length of the positioning pin 3 is set to be 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 so that the grommet 4 and the connector 7 are positioned. 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 causes the pin tip 3 a to protrude from the fitting hole 6 to the outside.

As a result, as shown in FIG. 3, the operator can visually check the distal end 3a of the positioning pin 3 and can confirm that the connector 7 is turned 180 ° and is not mounted on 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-fit lip 6a for the small end 3a.
To improve the sealing performance.

While the grommet 4 is black,
The color of the positioning pin 3, that is, the color of the connector housing 1 is set to white, so that the pin tip 3a can be easily visually checked. The positioning pin 3 is a ring wall 5 of a grommet 4.
Therefore, the ring wall 5 and the grommet fitting wall 2 of the connector housing 1 are firmly connected to each other, so that the ring wall 5 is prevented from being turned 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 on the upper, lower, left and right sides of the connector housing 1 have panel holes 8 formed therein.
a, the assembly of the connector 7 is achieved,
At the same time, the peripheral lip 9 comes into close contact with the panel 8 to exhibit waterproofness.

[0012]

As described above, according to the present invention, the positioning of the grommet and the connector is reliably performed by the engagement of the positioning pin of the connector housing with the fitting hole of the grommet, and the positioning workability and the working accuracy are improved. improves. Further, by visually confirming the positioning pins protruding from the grommet to the outside, the torsion mounting of the grommet to the panel and the reverse mounting of the connector are prevented. Further, since the positioning pin penetrates and engages with the grommet, the grommet is prevented from being turned up or a gap is generated, and the waterproof property is improved.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view showing the assembled state.

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 showing a malfunctioning state.

FIG. 6 is a plan view showing another problem.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connector housing 2 Grommet fitting wall 3 Locating pin 4 Waterproof grommet 6 Fitting hole

Claims (2)

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