JPH0214139Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seal member for a waterproof connector that has good waterproof properties.

[Conventional technology]

In the waterproof connector, as shown in FIG. 3, a sealing member 13 is interposed at the fitting portion between a male housing 11 and a female housing 12 made of synthetic resin.
It is common to prevent water from entering the housings 11 and 12. In this case, if the inner surface 12a of the fitting portion of the female housing 12 is approximately square and the corner portion 12b has a curvature as shown in FIG. The side portion 12c tends to bulge inward as shown by the dotted line. Therefore, during use, strong stress is applied to the side portions of the sealing member 13, and the corner portions are relatively loosely adhered, and the housing 1 is separated from these portions.
It has the disadvantage that water easily enters into the insides of 1 and 12.

[Purpose of invention]

It is an object of the present invention to provide a sealing member for a waterproof connector that eliminates the above-mentioned drawbacks and provides a contact pressure that is substantially equal to the contact pressure at the corner portions of the sealing member as at the side portions.

[Summary of the idea]

The gist of this invention to achieve the above objectives is as follows:
fixedly attached to the first connector housing;
An elastic sealing member having a substantially rectangular frame for slidably contacting and sealing the inner surface of the second connector housing having a curvature at the corner, and at least three members arranged in parallel along the outer circumferential direction. It has a row of ridges, and the center ridge is thinner than the ridges on both sides, and the corners bulge outward more than the ridges on both sides. This is a characteristic sealing member for waterproof connectors.

[Example of idea]

The present invention will be explained in detail based on the embodiments shown in FIGS. 1 and 2.

3 is a front view of the seal member 1, and FIG. 4 is a front view of the seal member 1.
It is a sectional view along the - line in the figure. The sealing member 1 is a substantially rectangular frame-shaped body made of an elastic material such as rubber, and its corner portions are rounded on both the inner and outer surfaces. The inner surface is provided with a plurality of rows of ridges 2, which are fixedly inserted into the fitting portion of the male housing. The cross section of the seal member 1 is 3 on both the inner and outer surfaces.
Although individual ridges 2 and 3 are provided, for example, three ridges 3a, 3b, and 3c are provided on the outer surface that contacts the inner surface of the female housing on the other side. The ridges 3b and 3c are formed wider than the central ridge 3a. Further, the central ridge 3a is slightly higher than the ridges 3b, 3c on both sides. At the corner, the curvatures of the ridges 3b and 3c on both sides almost match the curvature of the inner surface of the female housing to be joined, but the curvature of the ridge 3a in the center is slightly larger than these curvatures. The ridges 3 on both sides are made smaller.
It is bulged outward to a greater extent than b and 3c.

As mentioned above, this seal member 1 is fixed to the fitting part of the male housing, but this fixation is done by pushing and expanding the inner surface of the seal member 1, so it is difficult to come off easily and the sealing effect is sufficient. It is. On the other hand, on the outer surface side of the sealing member 1 that contacts the mating female housing, a sufficient sealing effect can be obtained at the side portions as in the conventional case, and even at the corner portions, the central ridge 3a is located on the inner surface of the female housing. The sealing effect is extremely high because it adheres well to the surface.

In the embodiment, the curvature at the corner of the central ridge 3a is smaller than that of the ridges 3b, 3c on both sides, but the curvature may be the same and simply bulge outward. Moreover, since the conventional sealing effect at the side portions is sufficient, it is not necessarily necessary to intentionally make the central ridge portion 3a higher than the ridge portions 3b and 3c on both sides at the side portions. Furthermore, the outer ridges of the sealing member 1 may have four or more rows instead of three rows.

[Effect of idea]

As mentioned above, the sealing member for waterproof connectors according to the present invention has the central ridge at the corner section formed so as to bulge outward, so that the contact pressure is almost uniform over the entire outer circumference. This has the advantage of providing a sealing effect.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the waterproof connector sealing member according to the present invention, FIG. 1 is a front view thereof, FIG. 2 is a sectional view taken along the line - in FIG. 1,
FIG. 3 is a sectional view of a state in which a seal member is interposed between the housings, and FIG. 4 is an explanatory view of a modified example of the female housing after molding. Symbol 1 is a sealing member, 2, 3, 3a, 3b, 3
c is a ridge.

Claims (1)

[Claims for Utility Model Registration] 1. A substantially rectangular frame fixedly attached to the first connector housing and slidably in contact with the inner surface of the second connector housing having a curvature at the corner for sealing. It is an elastic sealing member, and has at least three rows of ridges arranged in parallel along the outer circumferential direction, and the central ridge is thinner than the ridges on both sides, and the corner ridge is thinner than the ridges on both sides. A sealing member for a waterproof connector, characterized in that the corner portion bulges outward more than the ridges on both sides. 2. The sealing member for a waterproof connector according to claim 1, wherein the central ridge is formed slightly higher than the ridges on both sides at the side portions. 3 The curvature of the central ridge in the corner is
The sealing member for a waterproof connector according to claim 1, wherein the curvature is smaller than the curvature of the ridges on both sides.