JPH10338252A - Waterproof and dustproof cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a costless waterproof and dustproof cap which retains a secure sealing function. SOLUTION: A state that a waterproof and dustproof cap 1 is set to a contact valve seat 2 is shown. The connection guide 1C and the cylindrical part 1A of the waterproof and dustproof cap 1 are joined to the connection part 2C of the contact valve seat 2 and the cylindrical part 2B on which a male screw is formed respectively. In this time, the ring-form seal part 1D projected on the outer peripheral face of the connection guide 1C is positioned to con-tact the inner peripheral face of the connection part 2C of the contact valve seat 2. Accordingly, air, water, and dust are prevented from penetrating into the contact plug seat 2 by the ring-form seal part 1D even when these materials have passed through the spiral grooves of the male screws formed on the cylindrical part 2B of the seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof / dustproof cap for preventing water or dust from entering a plug seat or the like having a cylindrical male screw connection.

[0002]

2. Description of the Related Art A conventional waterproof / dustproof cap of a plug seat will be described with reference to FIGS.

In FIG. 10, a waterproof / dustproof cap 11 made of an elastic material such as rubber or synthetic resin comprises a cylindrical portion 11A and a sealing portion 11B on one end surface.

Referring to FIG. 11, a plug seat 12 includes a flange portion 12A, a cylindrical portion 12B having an external thread, a connecting portion 12
C, an internal insulator 12D and a center contact 12E.

FIG. 12 shows a state in which the waterproof / dustproof cap 11 is attached to the plug seat 12, and the cylindrical portion 11 A of the waterproof / dustproof cap 11 has the male threaded cylindrical portion 12 of the plug seat 12.
B.

[0006]

The conventional waterproof / dustproof cap of the plug seat is integrally formed from an elastic material, and one end of a cylinder is sealed to form a cup. When this waterproof / dustproof cap is fitted to the male threaded cylindrical portion of the plug seat, air, water, dust, etc. can freely enter and exit through the wire groove of the male thread, so that it is airtight. Sex is not guaranteed.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the disadvantages of the conventional waterproof / dustproof cap, to provide a reliable waterproof / dustproof cap that maintains reliable sealing performance and is inexpensive.

[0008]

The present invention employs the following means to solve the above-mentioned problems.

(1) a cylindrical portion, a sealing portion at one end surface continuous with the cylindrical portion, and a coupling guide portion continuous with the sealing portion;
It is composed of an annular seal portion continuous with the coupling guide portion,
A waterproof and dustproof cap in which the coupling guide portion and the annular seal portion are smaller in diameter than the cylindrical portion, and are entirely formed of an elastic material.

(2) The waterproof and dustproof cap according to (1), wherein the coupling guide portion swells from the center of the inside of the sealing portion, and the annular seal portion protrudes from an outer peripheral surface of the coupling guide portion. .

(3) The waterproof and dustproof cap according to (1), wherein the coupling guide portion and the annular seal portion form a stepped cylinder.

(4) The waterproof and dustproof cap according to (1), wherein the coupling guide portion and the annular seal portion can be turned upside down and pushed into the cylindrical portion.

(5) The waterproof / dustproof cap according to the above (1), wherein the cylindrical portion can be folded back so as to surround the coupling guide portion and the annular seal portion.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Three embodiments of the present invention will be described with reference to FIGS.

First, a first embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, a waterproof / dustproof cap 1 made of an elastic material such as rubber or synthetic resin has a cylindrical portion 1A, a sealing portion 1B at one end surface of the cylindrical portion 1A, and a columnar shape bulging from the inner center of the sealing portion 1B. , And an annular seal portion 1D protruding from the outer peripheral surface of the coupling guide portion 1C.

The annular seal portion 1D shown in FIG. 1B protrudes from the circumferential surface of the coupling guide portion 1C. However, a design change is made to the annular seal portion 1D, as shown in FIG. It may be configured as a stepped cylinder having a coupling guide portion 1C and a large-diameter annular seal portion 1D.

In FIG. 3, the plug seat 2 is provided with a flange 2
A, comprises a cylindrical portion 2B having an external thread, a coupling portion 2C, an internal insulator 2D, and a center contact 2E.

FIG. 3 shows a state in which the waterproof / dustproof cap 1 is attached to the plug seat 2. The connecting guide portion 1C and the cylindrical portion 1A of the waterproof dustproof cap 1 are respectively connected to the connecting portion 2C of the plug seat 2 and the male screw. Is connected to the cut cylindrical portion 2B. At this time, the annular seal portion 1D of the waterproof / dustproof cap 1 is pressed against the inner peripheral surface of the connecting portion 2C of the plug seat 2. Therefore,
Even if air, water or dust passes through the wire groove of the male screw,
Intrusion into the plug seat 2 is prevented by the annular seal portion 1D.

Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the description which overlaps with the first embodiment will be omitted.

FIG. 4 shows the waterproof / dustproof cap 1 in a manufactured state, which is formed in the shape of a stepped cylinder having one end sealed. The waterproof / dustproof cap 1 includes a large-diameter cylindrical portion 1A, a stepped sealing portion 1B, a small-diameter annular sealing portion 1D, and a bottom coupling guide portion 1C.

Before attaching the waterproof / dustproof cap 1 to the plug seat 2, as shown in FIG. 5, the coupling guide portion 1C and the annular seal portion 1D are pushed from the broken line to the solid line so as to be turned upside down. Let it.

Subsequently, as shown in FIG. 6, when the waterproof / dustproof cap 1 is attached to the plug seat 2, the annular seal portion 1 D of the waterproof / dustproof cap 1 is attached to the inner peripheral surface of the connecting portion 2 C of the plug seat 2. Press against

Further, a third embodiment of the present invention will be described with reference to FIGS. In addition, the description which overlaps with the first embodiment will be omitted.

FIG. 7 shows the waterproof / dustproof cap 1 in a manufactured state, which is formed in the shape of a stepped cylinder whose one end face is sealed. The waterproof / dustproof cap 1 includes a large-diameter cylindrical portion 1A, a stepped sealing portion 1B, a small-diameter annular sealing portion 1D, and a bottom coupling guide portion 1C.

When the waterproof / dustproof cap 1 is mounted on the plug seat 2, first, as shown in FIG. 8, the connecting guide portion 1C and the annular seal portion 1D of the waterproof / dustproof cap 1 are connected to the connecting portion 2C of the plug seat 2. To join.

Next, as shown in FIG. 9, the cylindrical portion 1A is turned 180 degrees in the direction of the arrow from the dashed line to the solid line around the sealing portion 1B of the waterproof / dustproof cap 1, and the male plug seat 2 It is brought into pressure contact with the threaded cylindrical portion 2B.

When the plug 2 is not used, the waterproof / dustproof cap 1 is attached to the plug 2 from the center contact 2E side of the plug 2 and the cylindrical portion 1A of the waterproof / dustproof cap 1 is attached.
Can be fitted to the flange portion 2A of the plug seat 2.

[0029]

As is apparent from the above description, the present invention has the following advantages.

(1) Reliable sealing performance can be maintained.

(2) Since it is manufactured by integral molding, the cost is low.

(3) Attaching and detaching to and from a plug seat or the like can be easily performed.

(4) Recycling is possible.

[Brief description of the drawings]

1A and 1B show a waterproof and dustproof cap according to a first embodiment of the present invention, wherein FIG. 1A is a front view and FIG. 1B is a sectional view.

FIGS. 2A and 2B show a waterproof and dustproof cap in which the design of the first embodiment of the present invention is modified, wherein FIG. 2A is a front view and FIG.

FIG. 3 is a cross-sectional view showing a state in which the waterproof / dustproof cap according to the first embodiment of the present invention is attached to a plug seat.

FIG. 4 is a cross-sectional view of a waterproof / dustproof cap according to a second embodiment of the present invention in a manufactured state.

FIG. 5 is a sectional view showing a state before mounting a waterproof / dustproof cap according to a second embodiment of the present invention.

FIG. 6 is a sectional view showing a state in which a waterproof / dustproof cap according to a second embodiment of the present invention is mounted on a plug seat.

FIG. 7 is a sectional view of a waterproof / dustproof cap according to a third embodiment of the present invention.

FIG. 8 is a sectional view showing a state in which a waterproof / dustproof cap according to a third embodiment of the present invention is connected to a plug seat.

FIG. 9 is a sectional view showing a state in which a waterproof / dustproof cap according to a third embodiment of the present invention is mounted on a plug seat.

10A and 10B show a conventional waterproof and dustproof cap, wherein FIG. 10A is a front view and FIG. 10B is a cross-sectional view.

FIG. 11 is a cross-sectional view of a conventional plug seat.

FIG. 12 is a sectional view showing a state in which a conventional waterproof / dustproof cap is attached to a plug seat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterproof dustproof cap 1A Cylindrical part 1B Sealing part 1C Coupling guide part 1D Annular seal part 2 Connector seat 2A Flange part 2B Cylindrical part 2C Coupling part 2D Internal insulator 2E Center contact

Claims (5)

[Claims] A cylindrical portion, a sealing portion at one end surface continuous with the cylindrical portion, a coupling guide portion continuous with the sealing portion, and an annular seal portion continuous with the coupling guide portion; A waterproof and dustproof cap, wherein the portion and the annular seal portion are smaller in diameter than the cylindrical portion, and the whole is integrally formed of an elastic material. 2. The coupling guide according to claim 1, wherein the coupling guide bulges from the center of the inside of the sealing portion, and the annular sealing portion protrudes from an outer peripheral surface of the coupling guide. Waterproof dustproof cap. 3. The waterproof and dustproof cap according to claim 1, wherein the coupling guide portion and the annular seal portion form a stepped cylinder. 4. The waterproof and dustproof cap according to claim 1, wherein the coupling guide portion and the annular seal portion can be turned upside down and pushed into the cylindrical portion. 5. The waterproof and dustproof cap according to claim 1, wherein the cylindrical portion can be folded back so as to surround the coupling guide portion and the annular seal portion.