JPH0142303Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seal structure for a waterproof connector, and more particularly to a seal structure for preventing the packing used in the waterproof connector from coming off.

In a conventional waterproof connector, as shown in FIG. The annular packing d is fitted into the recess c, and the hole shown in Fig. 1b is inserted into the fitting hole b.
The male housing B' housing the female terminal (not shown) shown in Fig. 1c is fitted into the fitted state shown in Fig. The annular packing d is held by being pressed against the outer wall e of the front end of the housing B'.

However, in such conventional waterproof connectors, when installing the packing d into the recess c in the fitting hole b of the female housing A', it is difficult to confirm whether it is correctly installed in the recess c. If it is not installed correctly, not only will the seal be incomplete, but also the gasket will easily come out at the same time when the male housing B' is removed from the female housing A'. Furthermore, even when the seal d is correctly installed in the recess c, the seal is prevented from coming off only by the relatively shallow front edge step f of the recess c formed on the inner surface of the peripheral wall of the fitting part of the female housing A'. The male housing fitted into the female housing A′
When removing B', the seal d may be misaligned or may be pulled out, and when the male housing is refitted after being misaligned, it may not be possible to maintain a sufficient seal at the mating part. This results in the following problem.

The present invention was developed by focusing on the problems with the sealing structure of conventional waterproof connectors.The present invention is designed to ensure that the seal fits securely into the male housing fitting hole of the female housing, has excellent sealing performance, and prevents the seal from slipping out. The purpose of the present invention is to provide a sealing structure for a waterproof connector that prevents the above problems.

The present invention will be explained below based on drawings showing embodiments.

FIG. 2a shows a partially cutaway perspective view of the main part of the female housing A according to the present invention, and FIG. 2b shows a partially cutaway perspective view of the packing B according to the present invention.

In Fig. 2a, 1 is a peripheral wall constituting the front part of the female housing A, and the inside of the peripheral wall 1 is shown in Fig. 3b.
A fitting hole portion 2 of the male housing C shown in is formed.

Further, a male terminal accommodating chamber (not shown) is connected to the rear of the fitting hole 2, and the fitting hole 2 and the male terminal accommodating chamber are separated by a partition wall 3. A recess 4 is provided on the inner peripheral surface of the peripheral wall 1 adjacent to the partition wall 3, and a locking protrusion 5 is provided on the surface of the partition wall 3 approximately in the center thereof protruding toward the fitting hole 2. be done. This locking protrusion 5 is for fixing a gasket which will be described later.
The distal end of is formed into a chevron-shaped portion 5a so that the fixing hole of the gasket can be easily inserted, and the chevron-shaped portion 5a
A step portion 5b is formed on the lower edge of the holder to securely fix the gasket thereon.

The gasket B shown in FIG. 1b consists of an elastic annular body 6 with a bulging band 7 provided on its inner peripheral surface, and a locking wall 8 is integrally provided on one side of the annular gasket B in the axial direction. Further, a hole 9 for locking the aforementioned projection 5 is bored in the surface of the locking wall 8 at a substantially central portion corresponding to the locking projection 5. The hole 9 is generally circular in shape and size as long as it has a shape and size that allows the stepped portion 5b formed at the lower edge of the chevron-shaped portion 5a of the locking projection 5 to be locked therein.

Next, the operation of the present invention will be explained with reference to FIG. 3 in addition to FIG. 2.

First, the packing B shown in Fig. 2b is replaced with Fig. 2a.
It is inserted and fitted into a recess 4 formed in the inner peripheral surface of the peripheral wall 1 in the female housing A shown in FIG. In this case, the hole 9 drilled in the locking wall 8 of the seal B is pushed into the tip chevron portion 5a of the locking protrusion 5 of the female housing A.
It is locked to the lower edge stepped portion 5b of the chevron portion 5a. The main part sectional view of FIG. 3a shows the female housing A in this way.
This shows a state in which the packing B is installed and fixed inside the peripheral wall 1 of. In the figure, reference numeral 11 denotes a tongue-shaped electrical contact portion at the tip of a male terminal (not shown) housed in the rear terminal storage chamber of the peripheral wall 1, and a gap 10 on both sides of the locking wall 8 of the seal B (see FIG. 2). b) is inserted therethrough and extends to the fitting hole 2 side.

FIG. 3b shows a cross-sectional view of a male housing C that accommodates a normal female terminal 12. It is engaged and fixed to the tip end projection 13a of the flexible arm 13, and
A recess 14 is formed between the distal end branches of 3.

When the male housing C having such a configuration is inserted and fitted into the fitting hole 2 of the female housing A, the tongue piece 11 of the male terminal is pressed into the electrical contact portion 12a of the female terminal, and an electrical connection is established at the same time. The front end outer wall 15 of the male housing C is pressed into contact with the bulging band 7 of the gasket B fitted and fixed within the peripheral wall 1 of the female housing A, thereby sealing the terminal contact portions from the outside air. In this case, the chevron-shaped tip 5a of the locking protrusion 5 protruding from the partition wall 3 of the female terminal A enters the recess 14 formed at the tip of the flexible arm of the male housing C, allowing the female terminal 12 to be inserted into the recess 14. Tip projection 1 of flexible arm 13
This prevents the male housing C from coming off forward or backward due to disengagement of the male housing C.

As described above, the present invention provides a locking wall 8 having a locking hole 9 on one side of the annular packing B in the axial direction,
A locking protrusion 5 protruding into the fitting hole 2 is provided on the partition wall 3 between the fitting hole 2 and the terminal accommodating chamber of the female housing A, and the fitting hole 2 is provided adjacent to the partition wall 3.
An annular recess 4 is provided on the inner peripheral surface of the annular packing B.
is fitted into the annular recess 4 of the fitting hole 2, and the locking hole 9 is engaged with the locking protrusion 5, and the electrical contact portion 11 of the male terminal housed in the female housing A is connected to the locking wall 8. The annular packing fitted into the female housing is inserted through the cavity 10 of the housing and extends into the fitting hole 2, so that the annular recess of the fitting hole and the partition wall are engaged with each other. It is possible to completely prevent the seal from shifting or coming out of the housing by being locked and fixed by the protrusion, and even if the male housing that is fitted into the female housing is removed, the seal will not shift or come out. does not occur at all. Furthermore, by locking the gasket to the protrusion, it is easy to confirm whether the gasket is accurately fitted into a predetermined position. Therefore, according to the present invention, the fitting portions of the male and female connectors can always be maintained in a highly reliable sealing structure.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the sealing structure of a conventional waterproof connector, in which a is a schematic cross-sectional view showing the seal attached to the female housing, b is a front view of the main part of the male housing, and c is a schematic cross-sectional view showing the sealing structure of the male and female connectors. Figure 2a is a partially cutaway perspective view showing the main parts of the female housing used in the seal structure of the present invention;
FIG. 3b is a partially cutaway perspective view of the packing used in the seal structure of the present invention, FIG. . 1... Peripheral wall, 2... Fitting hole portion, 3... Partition wall,
5... Locking protrusion, 8... Locking wall, 9... Hole, A...
...Female housing, B...Patzkin, C...Male housing.

Claims (1)

[Scope of utility model registration request] A locking wall 8 having a locking hole 9 is provided on one side in the axial direction of the annular packing B, and the fitting hole 2 is connected to the partition wall 3 between the fitting hole 2 of the female housing A and the terminal accommodating chamber.
A locking protrusion 5 protruding inward is provided and the partition wall 3
An annular recess 4 is provided on the inner circumferential surface of the fitting hole 2 adjacent to the annular packing B, and the annular packing B is fitted into the annular recess 4 of the fitting hole 2, and the locking hole 9 is connected to the locking projection 5. The electrical contact portion 11 of the male terminal accommodated in the female housing A is inserted through the gap 10 of the locking wall 8 and extended into the fitting hole 2. Seal structure of connector.