JP2001351725A - Waterproof connector for coaxial cable - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent water that has entered a gap between an outer conductor of a coaxial cable and a sheath, thereby preventing an electrical short circuit due to the water. A coaxial cable waterproof connector (6) for connecting a coaxial cable (1) having an outer conductor (4) around an inner conductor (2) via an insulator (3) and surrounding the outer conductor (4). Between the exposed outer conductor 4 at the end of the cable 1 and the guide 7 that sandwiches the outer conductor 4, water that has entered the gap between the outer conductor 4 and the sheath 5 flows into the connector 6. The water running prevention gasket 24 for preventing water leakage is provided so as to cover the periphery of the outer conductor 4 exposing the water running prevention gasket 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for connecting a coaxial cable having an outer conductor around an inner conductor via an insulator and having a sheath mounted around the outer conductor. The present invention relates to a waterproof connector for a coaxial cable that can prevent water from entering.

[0002]

2. Description of the Related Art A coaxial cable mainly used for wireless communication has an outer conductor around an inner conductor via an insulator, and a sheath is mounted around the outer conductor.

FIG. 6 shows a coaxial cable connector for connecting the coaxial cable.

As shown in the figure, a conventional coaxial cable connector 51 includes a guide 55 for gripping a sheath 53 and an outer conductor 54 of a coaxial cable 52, an outer conductor 56 of the connector that contacts the outer conductor 54, and an outer conductor 56. 56 and the inner conductor 5 of the coaxial cable 52 disposed via the insulator 57.
8 and an internal conductor 59 of the connector that contacts the connector 8.
The guide 55 and the external conductor 56 of the connector are screwed together.

When the coaxial cable 52 is attached to the coaxial cable connector 51, first, the sheath 53 of the coaxial cable 52 is cut off to a predetermined length to expose the outer conductor 54, and then passed through a guide 55. The outer conductor 54 and the insulator 61 are processed to expose the inner conductor 58. After the inner conductor 58 is attached to the inner conductor 59 of the connector, the outer conductor 56 of the connector is screwed into the guide 55 while rotating.

[0006]

By the way, when the coaxial cable 52 has a flaw 62 penetrating the sheath 53,
Water due to rain or the like may enter the gap 63 between the outer conductor 54 and the sheath 53.

In the coaxial cable connector 51 described above,
Water that has entered the gap 63 between the outer conductor 54 of the coaxial cable 52 and the sheath 53 flows into the coaxial cable connector 51.

In the connector 51, the guide 55 is in close contact with the external conductor 54, but since both are made of metal,
There is some gap, there is no function to stop the flowing water,
Water penetrates further into the interior. Therefore, there is a problem that the insulator 61 is flooded from the end of the coaxial cable 52, the insulation resistance between the outer conductor 54 and the inner conductor 58 of the coaxial cable 52 is reduced, and an electrical short circuit occurs.

Accordingly, the present invention has been devised to solve the above-mentioned problem, and an object of the present invention is to stop water that has entered a gap between an outer conductor of a coaxial cable and a sheath, thereby stopping electric power generated by the water. It is an object of the present invention to provide a coaxial cable waterproof connector capable of preventing a short circuit.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for connecting a coaxial cable having an outer conductor around an inner conductor via an insulator and having a sheath mounted around the outer conductor. In a waterproof connector for a coaxial cable, between the exposed outer conductor at the end of the coaxial cable and a guide that sandwiches the outer conductor, water that has entered the gap between the outer conductor and the sheath is inward of the connector. The water running prevention gasket for preventing the gas from flowing into the outer conductor is provided so as to cover the periphery of the outer conductor.

According to the above configuration, the water that has entered the gap between the outer conductor of the coaxial cable and the sheath is stopped by the water running prevention gasket, so that it does not enter the inside of the connector, and the outer conductor of the connector does not enter. The insulator between the inner conductor and the inner conductor is not flooded, and an electrical short circuit can be prevented.

A section C for tightening the gasket is provided around the gasket for preventing water running.
Preferably, a gasket compression band of a mold is provided, and an urging means for urging the gasket compression band radially inward is provided outside the gasket compression band.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a sectional view showing an embodiment of a waterproof connector for a coaxial cable according to the present invention, and FIG.
FIG. 3 is a perspective view showing the water running prevention member, FIG. 4 is a side view of the coaxial cable, and FIG. 5 is a cross-sectional view of the coaxial cable.

First, the configuration of a coaxial cable connected by the waterproof connector for a coaxial cable according to the present invention will be described. In the present embodiment, an N-type connector will be described as an example. However, the present invention is not limited to the N-type connector, and it is needless to say that the present invention can be applied to connectors of other shapes.

As shown in FIGS. 4 and 5, the coaxial cable 1 is provided with an inner conductor 2 made of a copper wire, a copper-coated aluminum wire, a copper pipe, or the like at the axial center position. Inner conductor 2
Is provided with an insulator 3 such as foamed polyethylene at a predetermined thickness, and an outer conductor 4 is provided therearound. The outer conductor 4 is formed in a corrugated pipe shape by subjecting a copper pipe to a spiral wave forming process. A sheath 5 made of polyethylene, vinyl, or the like is provided around the outer conductor 4.

Next, the construction of the waterproof connector for a coaxial cable according to the present invention will be described.

As shown in FIG. 1, the waterproof connector 6 for a coaxial cable comprises an outer conductor 4 of the coaxial cable 1 and a sheath 5.
Is provided.

The guide 7 is formed in a substantially cylindrical shape by brass or the like, and its rear portion (the right side in FIG. 1) is formed to have an enlarged diameter. The sheath 5 of the coaxial cable 1 is inserted into the enlarged portion 8. Then, the sheath 5 is gripped. On the other hand, the reduced diameter portion 9 at the front (left side in FIG. 1) of the guide 7 has an inner peripheral surface formed in a spiral wave shape, and is in close contact with the outer peripheral surface of the outer conductor 4 exposed at the end of the coaxial cable 2. It has become.

An outer conductor 11 of a connector extending forward is screwed and fixed to the outer periphery of the reduced diameter portion 9 of the guide 7. The outer conductor 11 is formed in a substantially cylindrical shape by brass or the like, extends radially inward from the front of the guide 7, and comes into contact with the tip of the outer conductor 4 of the coaxial cable 1. .

Inside the outer conductor 11, an inner conductor 14 of the connector is provided via a ring-shaped insulator 12 made of a fluorine resin or the like. The internal conductor 14 is formed in a rod shape from phosphor bronze or the like, and an insertion hole 15 into which the internal conductor 2 of the coaxial cable 1 is inserted is formed at the rear end.

A connection nut 16 made of brass or the like is provided on the outer front side of the outer conductor 11, and a female screw 17 is engraved on an inner peripheral surface of the connection nut 16.
A ring-shaped gasket 18 made of silicon rubber or the like is provided behind the female screw 17 and in front of the external conductor 11, and a cylindrical external conductor 19 extending forward is provided.

Reference numeral 21 in the figure denotes a stop ring for fixing the outer conductor 11 and the connection nut 16, and is made of phosphor bronze or the like. In the figure, reference numeral 22 denotes an O-ring for stopping water between the guide 7 and the outer conductor 11,
It is formed of silicon rubber or the like.

The waterproof connector 6 for a coaxial cable according to the present invention comprises an outer conductor 4 and a sheath between the exposed outer conductor 4 at the end of the coaxial cable 1 and a guide 7 for holding the outer conductor 4. A water running prevention gasket 24 for preventing water that has entered the gap 23 with the inside 5 from flowing into the inside of the connector is provided so as to cover the periphery of the exposed outer conductor 4.

The water running prevention gasket 24 is formed of an elastic material such as silicone rubber, and
Is provided by being inserted inside the enlarged diameter portion 8. The water running prevention gasket 24 is formed into a helical wave shape by expanding the inner peripheral surface to cover the sheath 5 of the coaxial cable 1 at the rear and reducing the inner peripheral surface to cover the exposed outer conductor 4 at the front. Have been.

A gasket compression band 25 having a C-shaped cross section (see FIGS. 2 and 3) for tightening the gasket 24 is provided around the gasket 24. The gasket compression band 25 is made of a material having excellent spring properties such as phosphor bronze or stainless steel.

Above and below the gasket compression band 25, a set screw 26 is provided as urging means for urging the gasket compression band 25 radially inward. The set screw 26 has screw holes 27 formed at the top and bottom of the guide 7.
Is screwed into.

When attaching the coaxial cable 1 to the waterproof connector 6 for a coaxial cable, first, the sheath 5 of the coaxial cable 1 is cut out to a predetermined length to expose the outer conductor 4, pass through the guide 7, and then pass through the guide 7. Outer conductor 4 of cable 1
Then, the insulator 3 is processed to expose the internal conductor 2. After tightening the set screw 26 to make the gasket 24 tightly adhere to the outer conductor 4 with the gasket compression band 25 and attaching the inner conductor 2 to the inner conductor 14 of the connector, the guide is rotated while rotating the outer conductor 11 of the connector. 7

Next, the operation of the waterproof connector 6 for a coaxial cable having the above configuration will be described.

As described above, the guide 7 and the coaxial cable 1
By providing a water running prevention gasket 24 made of an elastic material such as silicon rubber and having an inner peripheral surface formed into a spiral wave between the outer conductor 4 having an exposed end portion, The contact surface between the inner peripheral surface of the prevention gasket 24 and the outer conductor 4 can be brought into water-tight contact.

Thus, water that has entered the gap between the outer conductor 4 of the coaxial cable 1 and the sheath 5 can be stopped at the front end of the sheath 5 at the rear end of the coaxial cable waterproof connector 6.

Also, when water tries to enter from the rear end of the waterproof connector 6 for the coaxial cable, since the inner peripheral surface of the guide 7 and the outer peripheral surface of the water flow preventing gasket 24 are in water-tight contact, Can stop water.

Therefore, the coaxial cable waterproof connector 6
Does not intrude into the inside of the coaxial cable 1 and water does not intrude into the inside from the end of the coaxial cable 1 as in the related art. Therefore, since the outer conductor 4 and the inner conductor 2 do not make electrical contact, an electrical short circuit can be prevented.

Further, the gasket compression band 25 is tightened by tightening the immobilizing screw 26 as the urging means, so that the adhesion between the water running prevention gasket 24 and the outer conductor 4 and the sheath 5 can be improved.

In the above-described embodiment, the set screw 26 serving as the urging means for the gasket compression band 25 is
Although two portions are provided above and below the gasket compression band 25, the number may be further increased. According to this, the urging force applied to the gasket compression band 25 can be made uniform, and the adhesion between the water running prevention gasket 24 and the outer conductor 4 and the sheath 5 can be further improved.

[0036]

In summary, according to the present invention, the water infiltration into the gap between the outer conductor of the coaxial cable and the sheath is stopped by providing the water running prevention gasket between the guide and the outer conductor of the coaxial cable. Water has an excellent effect of preventing an electric short circuit caused by water.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a waterproof connector for a coaxial cable according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing a water running prevention member.

FIG. 4 is a side view of the coaxial cable.

FIG. 5 is a sectional view of a coaxial cable.

FIG. 6 is a cross-sectional view showing a conventional coaxial cable connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coaxial cable 2 Inner conductor 3 Insulator 4 Outer conductor 5 Sheath 6 Waterproof connector for coaxial cable 7 Guide 24 Water spill-prevention gasket 25 Gasket compression band 26 Immo screw (biasing means)

Claims (2)

[Claims] 1. A waterproof connector for a coaxial cable for connecting a coaxial cable having an outer conductor around an inner conductor via an insulator and having a sheath mounted around the outer conductor. Between the exposed outer conductor and the guide that sandwiches the outer conductor, a water running prevention gasket was exposed to prevent water entering the gap between the outer conductor and the sheath from flowing into the connector. A waterproof connector for a coaxial cable, wherein the connector is provided so as to cover the periphery of the outer conductor. 2. A gasket compression band having a C-shaped cross section for tightening the water flow prevention gasket is provided around the water flow prevention gasket, and the gasket compression band is radially inwardly provided outside the gasket compression band. The waterproof connector for a coaxial cable according to claim 1, further comprising an urging means for urging the coaxial cable.