JPH0323669Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is used for waterproof connectors, and is a connector seal that is interposed between the connector housing and the lead wire to ensure the waterproofness of the connection terminals. It is related to members.

[Conventional technology]

A waterproof connector has a waterproof structure in which a sealing member is attached to each lead wire of an inserted connecting terminal in order to prevent water from entering from the outside. This sealing member is usually fixed to the lead wire by caulking the crimp portion to the lead wire using the crimp portion of the contact terminal. however,
Such caulking may cause the distal end of the sealing member to expand, reducing the water-sealing effect or causing problems such as the sealing member slipping out from the caulking portion of the connection terminal.

[Purpose of invention]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a sealing member for a connector that has a good water-sealing effect and a good retaining effect.

[Summary of the idea]

The gist of this invention to achieve the above objectives is as follows:
The front end is a cylindrical caulking part, the rear end is a sealing part having a corrugated cross section on the inner and outer surfaces, a lead wire is inserted into the inside, and the lead wire in the caulking part is caulked from the outside by a crimp part of a connecting terminal. The approximately cylindrical soft sealing member is interposed in the insertion hole of the connector housing, and an annular bulge is formed on the inner surface of the distal end of the caulked portion, and the inner diameter of the caulked portion is set to be the same as that of the lead wire. and the inner diameter of the bulging portion is smaller than the outer diameter of the lead wire, and the tip of the crimping portion is crimped by the crimping portion of the connection terminal. This is a connector sealing member characterized in that it bends outward when pressed to prevent a connecting terminal from coming off from a crimped portion.

[Example of idea]

The present invention will be explained in detail based on illustrated embodiments.

FIG. 1 is a front view of a sealing member 1 according to the present invention;
FIG. 2 is a rear view, and FIG. 3 is a sectional view. This seal member 1 is made of a soft material such as synthetic resin or rubber. The front end of the seal member 1 has a cylindrical caulking part 2, and the inner and outer surfaces of the substantially cylindrical rear end 3 have corrugated cross sections, and a plurality of annular ridges 4 provide a water sealing effect. It's summery. The inner diameter of the caulked part 2 is slightly larger than the outer diameter of the lead wire to be inserted, and an annular bulge part 6 is formed on the inner surface of the tip part 5. The inner diameter of the ridge 4 on the inner surface of the rear end 3 and the bulge 6 on the tip 5 are smaller than the outer diameter of the lead wire, and the outer diameter of the ridge 4 on the outer surface is smaller than the outer diameter of the ridge 4 on the outer surface of the connector housing. It is larger than the inner diameter of the insertion hole.

When using this seal member 1, the fourth
As shown in the figure, after inserting the lead wire 10, the lead wire 10 is caulked with the crimp portion 11 of the connecting terminal via the caulking portion 2, and then attached to the insertion hole 12 of the connector housing. Due to the stop, the tip 5 of the sealing member 1 is bent outward and expanded by the lever action of the bulge 6 on the inner surface, and the bulge 6 comes into close contact with the lead wire 10, so that sufficient water is not absorbed in this part. It will be sealed.
Further, since the tip portion 5 is bent outward, the seal member 1 does not come off from the crimp portion 11 of the connection terminal.

[Effect of idea]

As explained above, the sealing member of the connector according to the present invention has an inwardly directed bulge at the tip of the caulking part, so the water sealing effect will not be reduced even if it is caulked by the crimp part of the connection terminal. There is no possibility that the seal member will come off.

[Brief explanation of the drawing]

The drawings show an embodiment of the sealing member of the connector according to the present invention, in which Fig. 1 is a front view, Fig. 2 is a rear view, Fig. 3 is a cross-sectional view, and Fig. 4 shows a connection terminal attached and a housing. FIG. 3 is a cross-sectional view of the device installed in the insertion hole. 1 is a sealing member, 2 is a caulking portion, 3 is a rear end portion, 4 is a ridge portion, 5 is a tip portion, 6 is a bulge portion, 10
11 is a lead wire, 11 is a crimping portion, and 12 is an insertion hole.

Claims (1)

[Scope of utility model registration request] The front end is a cylindrical caulking part, the rear end is a sealing part having a corrugated cross section on the inner and outer surfaces, a lead wire is inserted into the inside, and the lead wire in the caulking part is caulked from the outside by a crimp part of a connecting terminal. The approximately cylindrical soft sealing member is interposed in the insertion hole of the connector housing, and an annular bulge is formed on the inner surface of the distal end of the caulked portion, and the inner diameter of the caulked portion is set to be the same as that of the lead wire. larger than the outer diameter, and the inner diameter of the bulge is smaller than the outer diameter of the lead wire,
In a state where the crimp portion of the connection terminal is caulked, the tip of the crimp portion is pushed by the bulging portion and curves outward, thereby preventing the connection terminal from coming off from the crimp portion. Sealing member for connectors.