JPH0763026B2 - High frequency coaxial cable connector-plug - Google Patents

Description

TECHNICAL FIELD The present invention relates to a connector plug for a high frequency coaxial cable.

[Conventional technology]

A feeder line is used to couple the antenna and the distributor or branching device to transmit high frequencies. The power supply line is a parallel two-wire type power supply line and a high frequency coaxial cable (hereinafter referred to as a coaxial cable).
It is well known that a coaxial cable is preferable for high frequency transmission. When the antenna and the distributor or the branch device are connected by the coaxial cable, the distributor or the branch device is connected to the coaxial cable via the connector plug for the coaxial cable.

FIG. 2 is an explanatory view showing a conventional connection method between a coaxial cable connector plug and a coaxial cable. In FIG. 2, 1 is a coaxial cable and 2 is a connector plug. The coaxial cable 1 is generally called FB type, and includes an inner conductor 3, an insulator 4 covering the inner conductor 3, a double-sided aluminum foil-clad plastic tape 5 covering the insulator 4, and a double-sided aluminum foil-clad plastic tape 5. The copper wire braid 6 for covering and the outer edge covering 7 for covering the copper wire braid 6 are formed concentrically. Further, the connector plug 2 is provided with a hollow outer conductor 8 at its tip.

[Problems to be solved by the invention]

The connector plug 2 and the coaxial cable 1 are connected by connecting the insulator 4 and the double-sided aluminum foil-clad plastic tape 5 to the cylindrical pierced portion 8a having a tapered tapered wall thickness integrally formed at the tail end of the outer conductor 8. It is performed by inserting it in between. However, the tubular piercing portion 8a has a sharp tip so that it can be easily inserted, and the coaxial cable 1 is in a state in which the respective parts are in close contact with each other. Therefore, when the tubular piercing portion 8a is fitted and inserted. To
If the double-sided aluminum foil-clad plastic tape 5 is damaged,
There was a problem of turning over.

In order to solve such a problem, there is a method in which the outer edge coating 7 is torn together with the double-sided aluminum foil-clad plastic tape 5 as shown in FIG. 3 to facilitate the fitting of the outer conductor 8. However, if the copper wire braid 6 or the double-sided aluminum foil-clad plastic tape 5 is scratched or broken when the outer coating 7 is torn, conduction failure, radio wave leakage, radio wave mixing, or the like occurs, and the characteristics of the coaxial cable 1 There was a problem that was damaged.

The present invention has been made to solve the above problems,
An object of the present invention is to provide a connector plug for a high frequency coaxial cable that can be connected to the coaxial cable without impairing the characteristics of the coaxial cable 1.

[Means for solving problems]

The connector plug of the present invention has a shield layer composed of a plurality of layers of outer conductor coating such as a double-sided aluminum foil-clad plastic tape and a copper wire braid as described in the prior art.
A high frequency coaxial cable called FB type, that is, a shield layer composed of a central inner conductor, an insulator covering the outer periphery of the inner conductor, and at least first and second outer conductor coatings covering the outer periphery of the insulator. And a high-frequency coaxial cable having a concentric structure composed of an outer insulating coating covering the outer periphery of the shield layer, and the end portion of the cable is received from the tail end side and connected to the cable. It is a connector plug consisting of a hollow cylindrical metal fitting. In the connector plug of the present invention, in particular, the tip end side of the tubular metal fitting is integrally formed around the entire circumference of the cable so as to coaxially surround the inner conductor exposed by removing the coatings at the cable end. An outer conductor is formed, and the outer conductor and the inner conductor form a coaxial connector terminal on the tip side of the tubular metal member. In addition, on the tail end side of the tubular metal fitting, a tapered tip-thickness cross-section that can be inserted from the end surface of the cable into the cylindrical surface of the boundary between the first outer conductor coating and the second outer conductor coating is provided. A tubular piercing part is provided integrally with the outer conductor along the entire circumference.

[Work]

Further, in the connector plug of the present invention, the distal end side of the hollow cylindrical metal fitting that receives the end portion of the high-frequency coaxial cable from the tail end side and is connected to the cable is exposed by removing the respective coatings at the cable end portion. An outer conductor integrally formed around the inner conductor is formed to surround the inner conductor coaxially,
The outer conductor and the inner conductor form a coaxial connector terminal on the tip end side of the tubular metal fitting, and the tubular piercing portion is integrally formed on the tail end side of the tubular metal fitting. Therefore, at the time of connection work with a high-frequency coaxial cable, the cylindrical piercing portion is formed from the cable end face to the first outer conductor coating and the second outer conductor coating only by exposing the inner conductor of a predetermined length at the cable tip. It is only necessary to insert it into the cylindrical boundary surface of, and it is not necessary to make a vertical slit in the outer insulation coating of the cable and to fold the second outer conductor coating back on the outer insulation coating as in the conventional case, so excellent workability of connection is achieved. In addition, the shield layer at the cable end in the state of being connected to the tip of the high-frequency coaxial cable makes sufficient electrical connection with the cylindrical puncture as described above, and at the same time, the inner conductor of the cable end. Surrounding surrounded seamlessly by the outer conductor of the integral whole periphery and the tubular piercing portion, thus because of its external conductor structure seamlessly contiguous with the coaxial connector plug, the loss of high-frequency transmission characteristics never hardly occur.

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view of a connector plug for a high frequency coaxial cable according to the present invention. In FIG. 1, 1 is a coaxial cable, 3 is an inner conductor, 4 is an insulator covering the inner conductor 3, 5 is a double-sided aluminum foil-clad plastic tape covering the insulator 4 as a first outer conductor coating, 6 Is a plastic tape 5 with double-sided aluminum foil as the second outer conductor coating
Is a copper wire braid, 7 is an outer insulation coating that covers the copper wire braid 6, 2 is a connector plug for a high-frequency coaxial cable according to the present invention, 8 is a hollow outer conductor, and 9 is a cable holding metal fitting. In this embodiment, the connector plug 2
At the tail end of the outer conductor 8 of the boundary between the double-sided aluminum foil-clad plastic tape 5 (first outer conductor coating) and the copper wire braid 6 (second outer conductor coating) from the end surface of the cable. A cylindrical pierced portion 8a having a tapered cross-section with a thick wall that can be inserted into a cylindrical surface is integrally provided.

Next, a method of connecting the high-frequency coaxial cable connector plug 2 and the coaxial cable 1 according to the present invention will be described. First, the cable pressing metal fitting 9 is externally fitted to the coaxial cable 1, and then the cylindrical piercing portion 8a of the outer conductor 8 is fitted between the double-sided aluminum foil-clad plastic tape 5 and the copper wire braid 6,
The cable retainer 9 is moved closer to the outer conductor 8 side, and the cable retainer 9 is further tightened.

〔The invention's effect〕

As described above, according to the present invention, the tubular pierced portion having the tapered tapered wall cross section integrally formed at the tail end of the hollow outer conductor of the connector plug for the high frequency coaxial cable is provided with the double-sided aluminum foil-clad plastic. Since the tape and the copper wire braid are adapted to be inserted at the boundary between the first and second outer conductor coatings, a part of the outer conductor coating such as the double-sided aluminum foil-clad plastic tape is prevented from being rolled up. .

In addition, in the connector plug of the present invention, it is not necessary to make a vertical cut in the outer insulating coating of the cable when inserting the tubular puncture into the end portion of the coaxial cable, and it is easy to perform the same work as the ordinary end treatment. In addition to the connection being made, the cylindrical piercing part of the outer conductor is sandwiched between the outer conductor coatings of the cable over a sufficient area on both the inner and outer surfaces, so leakage to the outside at the connection part with the connector plug of the coaxial cable The characteristics of the coaxial cable will not be impaired due to radiation and noise from the outside.

[Brief description of drawings]

FIG. 1 is a schematic view of a high frequency coaxial cable connector plug according to the present invention, and FIGS. 2 and 3 are explanatory views showing a conventional connection method between a high frequency coaxial cable connector plug and a high frequency coaxial cable. 1 ... High-frequency coaxial cable, 2 ... High-frequency coaxial cable connector plug, 3 ... Inner conductor, 4 ... Insulator,
5 …… Double-sided aluminum foil-clad plastic tape, 6 …… Copper wire braid, 7 …… External insulation coating, 8 …… External conductor, 8a ……
Cylindrical piercing part, 9 ... Cable retainer.

Claims (1)

[Claims] 1. A central inner conductor, an insulator covering the outer periphery of the inner conductor, a shield layer comprising at least first and second outer conductor coatings covering the outer periphery of the insulator, and the shield layer. A connector plug comprising a hollow cylindrical metal fitting that receives the end of a high-frequency coaxial cable having a concentric structure consisting of an outer insulation coating covering the outer periphery of the cable from the tail end side and connects the cable to the cable. The tip side of the metal fitting constitutes an outer conductor integrally formed around the inner conductor exposed by removing the coatings at the end of the cable, the outer conductor being coaxial with the outer conductor. A coaxial connector terminal is formed on the tip end side of the tubular metal fitting by the inner conductor, and the first outer conductor coating and the second outer conductor coating are formed on the tail end side of the tubular metal fitting from the end surface of the cable. On the cylindrical surface of the boundary between Frequency coaxial connector plug for cable, characterized in that provided in the entire circumference integrally shaped with a cylindrical piercing portion of the entrant tip tapered wall thickness cross-section the outer conductor.