JPH0339899Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a waterproof connector that maintains a watertight function by sealing between the outer peripheral surface of a male connector and the inner peripheral surface of a female connector with packing such as an O-ring. This invention relates to a support structure for a packing that prevents the packing from leaving its original position.

In the waterproof connector of the above type, an example of a structure for fixing the sealing packing is shown in Japanese Utility Model Publication No. 10462/1983. The basic structure of this is
As shown in the partial views of FIGS. 1 and 2 attached to the present invention, an annular groove 7 is formed between the female connector housing 1 and the male connector housing 10 that fits therein. Annular packing 2 inside
This was done so that the packing was pulled and fixed on the groove wall. Reference numeral 8 in FIG. 1 indicates a terminal fitting.

However, this structure has the following problems.

(b) There is a process of pushing the packing into the annular groove, and there are cases where this process is incomplete and the packing is not pushed into the groove accurately.

(b) The depth of the groove is formed by undercutting.
The limit is 0.3m/m.

(c) The packing pushed into the groove as described in (b) above easily comes off the groove and falls off when subjected to an impact.

The purpose of the present invention is to prevent the packing installed in a waterproof connector from being subjected to impact, shifting its position when the connector is removed, or falling off from the housing. Hereinafter, the configuration of the present invention to achieve the above object will be explained with reference to the attached drawings.

FIG. 3 shows a cross-sectional view of an example of the implementation of the male connector housing, in which an annular hole 6 into which a male connector housing (not shown) is fitted is bored in the periphery of the housing 1. A stepped portion 8 having a different diameter is formed on the inner circumferential surface of the hole 6 so as to protrude toward the inner circumferential direction following the large diameter surface on the inlet side, and comes into contact with the stepped portion 8 to accommodate the annular packing 2 in the annular hole.

An arbitrary number (two in the embodiment) of locking pieces 9a are provided extending in the axial direction from the annular edge 9 of the housing 1, and a packing presser protrusion 3 is provided at the tip of the locking pieces 9a.
A locking protrusion 5 is integrally provided with the locking piece 9a at a position close to the protrusion 3, and the locking piece is bent at the connecting portion between the locking piece 9a and the annular end portion 9. A thin hinge portion 4 is formed. The housing end edge 9 has an insertion hole 3a at a position in contact with the packing 2.
A locking hole 5a is provided in the annular hole 6 at a position close to the insertion hole 3a, the locking piece 9a is bent at the hinge portion 4, and the protrusion 3 is inserted into the insertion hole 3a to function as a packing presser. The locking protrusion 5 is pushed into the locking piece 5a to lock the locking piece 9a to the edge portion 9.

The rear end portion 1a of the housing 1 has a cylindrical shape, and an electric wire with a crimp terminal is inserted thereinto, and a housing hole 1c for receiving a crimp terminal passes through the housing 1 at a tip end portion 1b connected to a male connector.

The above configuration works as follows.

First, the annular packing 2 is pushed into the annular hole 6 of the housing 1 so that one side thereof comes into contact with the stepped portion 8 . Next, the locking piece 9a is bent at the hinge part 4 in the direction of the arrow in FIG.
It is supported at a lower level than the annular packing by abutting against the inlet side on the other side.
Further, the locking protrusion 5 of the locking piece 9a is pushed into the locking hole 5a of the end edge 9, and the locking piece 9a is locked to the end edge 9 using the locking tool 5b at the tip. By the above operation, the packing 2 is fixed by the step part 8 and the protrusion 3, and even if the connector receives an impact, the locking piece is locked to the end edge by the locking protrusion, so it will not come off from the end edge. Furthermore, even when the male connector is removed, the protrusions 3 and the locking protrusions 5 are not affected, and the protrusions 3 always support the packing 2 to prevent it from coming off. Note that, after the locking piece 9a is bent and locked to the edge portion 9, even if the hinge portion 4 is cut off, its operation will not be hindered.

4 and 5 are sectional views of main parts of a female connector housing according to another embodiment, in which the locking piece 9b is bent in the direction of the annular hole 6 and inserted into the hole, and the locking protrusion 5 is inserted into the hole. The locking piece 9b is engaged with the locking hole 5a to lock the housing edge 9, and the packing 2 is supported by the tip 9c of the locking piece.

6 and 7 are perspective views showing examples of other types of locking pieces, in which a rectangular insertion hole 14 is provided at the edge of the housing, and a locking piece 9d or 9e is inserted through the hinge portion 4. A protruding strip 12 is provided protrudingly on the back surface of the holder, the locking piece is bent in the direction of the arrow at the hinge portion, the protruding strip 12 is inserted into the insertion hole 14, and the surface of the protruding strip 12 supports the packing, and the locking piece A locking hole 13 provided in the housing is engaged with a locking protrusion 11 fixed to the housing, thereby locking the locking piece to the housing.

As described above, the present invention provides a waterproof connector in which a stepped portion protruding inwardly is formed on the inner circumferential surface of a hole in a female connector housing into which a male connector is inserted, and an inlet side surface of an annular packing supported by the stepped portion. A locking piece that supports the annular packing at a position lower than the annular packing is provided integrally with the female connector housing via a hinge portion, and the locking piece is locked to the female connector housing. When the packing is inserted into the hole for receiving the male connector in the female connector housing from the entrance side,
By pushing the packing into the step with a screwdriver, protrusion rod, etc., it can be easily and reliably placed in the specified position, and in this state, the integrally provided locking piece supports the entrance side of the packing. The packing can be easily installed in the correct posture, and there is no problem in fitting the male connector.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an example of a conventionally known packing fixing device for a waterproof connector, Fig. 2 is a partially enlarged sectional view of the main part of Fig. 1, and Fig. 3 is a female connector showing an example of the implementation of the present invention. Cross-sectional view of the housing, No. 4
5 and 5 are sectional views of main parts of a female connector housing showing other embodiments, and FIGS. 6 and 7 are perspective views showing examples of other types of locking pieces. DESCRIPTION OF SYMBOLS 1... Female connector housing, 2... Packing, 3... Protrusion, 4... Hinge part, 5... Locking protrusion, 6... Annular hole, 8... Step part, 9a... Locking piece.

Claims (1)

[Scope of utility model registration request] In a waterproof connector, a step portion protruding inwardly is formed on the inner circumferential surface of the hole of the female connector housing into which the male connector is inserted, and the step portion protrudes inwardly from the annular packing by coming into contact with the entrance side of the annular packing supported by the step portion. In a waterproof connector, a locking piece supporting the annular packing at a low position is provided integrally with the female connector housing via a hinge part, and a locking means is provided for locking the locking piece to the female connector housing. Packing support structure.