JPH019343Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coaxial cable connection socket used for connecting main cables of CATV systems.

Conventionally, plugging devices for connecting trunk cables, etc. to trunk amplifiers, branches, distributor housings, etc. have been made by manufacturing the plug and plug seat for connecting coaxial cables from brass separately from the die-cast housing. Afterwards, it is made by plating, and when it is assembled into the housing, a hole is drilled in the mounting position of the housing, and the plug seat is fixed by screwing.

However, in the case of such conventional plug devices, the plug and the plug seat are processed and plated from brass, making the processing complicated and expensive. The surface of the casing was hard, but the inside had holes and was made of soft material, which caused problems with waterproofing when screwing the connector seat into the drilled hole.

The present invention was developed in view of these conventional problems, and by making improvements to the fixing of the internal pieces, it has realized a plug structure that is easy to process, inexpensive, and has excellent waterproof properties. The purpose of the present invention is to provide a socket for connecting a coaxial cable.

In order to achieve this objective, the present invention eliminates the need to manufacture a separate plug seat by integrally forming a plug seat ring-shaped external conductor that protrudes outside the casing that houses the circuit section. The inner periphery of the annular external conductor is formed with an internal thread into which a coaxial cable connection plug is screwed from the outside, and an internal piece consisting of a center contact and an insulator is provided on the housing side following the internal thread. A storage part is formed that has a smaller diameter than the internal threaded part to be stored, and this storage part is equipped with a stop part that stops the inner piece in a predetermined position when inserted from the outside. The inner piece is fixed to the storage part by screwing and tightening an inner piece fixing ring having a part and a relief part having a smaller diameter than the outer threaded part.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is an explanatory cross-sectional view showing an embodiment of the coaxial cable connection socket of the present invention together with the cable connection socket.

First, the structure will be described. Reference numeral 1 denotes a housing in which a circuit section is housed, and a plug seat annular outer conductor 2 that protrudes outward from the side surface of the housing 1 and serves as a plug seat is integrally formed. The annular external conductor 2 of the plug seat has an internal threaded part 3 formed on the inner periphery from the outside, and an internal piece storage part 4 having a smaller diameter than the internal threaded part 3 is formed on the side of the casing 1 following this internal threaded part 3. A stop portion 7 is formed at the end of the piece storage portion 4 for stopping an inner piece 6 having a center contact 5 inserted from the outside into the annular outer conductor 2 of the plug seat.

An inner piece fixing ring 8 is screwed into the inner threaded part 3 of the annular outer conductor 2 of the plug seat with an inner piece 6 having a center contact 5 inserted into the inner piece storage part 4. The inner piece 6 is fixed by joint tightening.

On the other hand, for the connector seat formed integrally with the housing 1, the coaxial cable connection connector 10 connected to the coaxial cable connects the external threaded portion 11 to the connector seat annular outer conductor 2.
The center contact 5 of the inner piece 6 and the annular outer conductor 2 of the plug seat are connected and fixed to the center conductor and outer conductor of the coaxial cable connecting plug 10.

Fig. 2 shows the annular outer conductor 2 of the plug seat which is formed integrally with the housing 1 in the embodiment shown in Fig. 1. A threaded portion 3 is formed, and a small-diameter internal piece storage portion 4 is formed following this internal threaded portion 3. Furthermore, the internal piece storage portion 4 has a stepped hole on the side of the casing 1, so that the internal piece can be inserted from the outside. A stop portion 7 is formed to stop it in a predetermined position when inserted. This stop portion 7 may be a tapered hole that narrows toward the housing 1 side. A plug seat having such a structure is integrally produced by die-casting the housing 1, and it is only necessary to thread the internal threaded portion 3 after die-casting.

FIG. 3 shows the internal piece fixing ring 8 taken out from the embodiment shown in FIG.
A cross section is shown in FIG.

That is, the inner piece fixing ring 8 has an outer threaded part 12 formed on its outer periphery to be screwed into the inner threaded part 3 of the annular outer conductor 2 of the plug seat shown in FIG. A relief portion 13 having a smaller diameter than the portion 12 is formed, and jig mounting holes 14 for screwing the inner piece fixing ring 8 are formed at four locations on the end face facing the outer threaded portion 12.

Here, the outer threaded portion 1 of the inner piece fixing ring 8 is
The reason why the small-diameter relief part 13 is formed following 2 is that if the external threaded part 12 is formed all along the outer circumferential axial direction, the outer threaded part 12 of the annular outer conductor 2 of the plug seat shown in FIG. The deep part of the internal threaded part 3 is not completely threaded, and even if the internal piece fixing ring 8 is screwed into the internal threaded part 3, the internal piece fixing ring 8 cannot be screwed all the way to the end of the internal threaded part 3. , the internal piece 6 inserted into the internal piece storage section 4 cannot be sufficiently tightened and fixed.

On the other hand, as is clear from FIG. 4, even if the threading of the internal threaded part 3 on the internal piece storage part 4 side is insufficient due to the relief part 13 being formed following the external threaded part 12, The relief portion 13 is tightened in the portion where the threading is insufficient, and the inner piece 6 can be reliably tightened and fixed by the inner piece fixing ring 8.

FIG. 5 shows the internal piece 6 in the embodiment shown in FIG.
The internal piece 6 is made by fitting the insulators 15, 16, and 17 divided into three into the center contact 5, and inserting the O-ring 18 between the center contact 5 and the insulator 17. In addition to waterproofing, the internal piece storage section 4 is provided as shown in Figure 1.
An O-ring 19 is attached to the outer circumferential groove of the insulator 17 to ensure waterproofing when stored in the insulator 17.

The inner piece 6 having such a structure is inserted from the outside into the inner piece storage portion 4 of the annular outer conductor 2 of the plug seat shown in FIG. The inner piece fixing ring 8 shown in FIGS. 3 and 4 is screwed into the inner threaded part 3 of the annular outer conductor 2 of the plug seat, and then tightened and fixed as shown in FIG. 1. Ru.

Next, to explain the effects of the present invention, firstly, the annular outer conductor of the connector seat that forms the connector seat is formed integrally with the housing, so there is no need to make the annular outer conductor of the connector seat as a separate component. In addition, there is no need to drill holes in the housing to attach the connector seat, just cut an internal thread from the outside into the annular outer conductor of the connector seat, which is formed integrally with the housing by die-casting. A plug seat can be formed.

In addition, as an inner piece fixing ring that fixes the center contact inserted into the housing of the annular outer conductor of the plug seat and the inner piece made of an insulator, a small diameter Since the relief part is provided, even if there is an insufficiently threaded part at the deep end of the internal thread part of the annular outer conductor of the plug seat, the internal thread part will not be completely threaded due to the relief part of the inner piece fixing ring. The internal piece fixing ring can also be screwed into the portion where the internal piece is inserted, and by screwing the internal piece fixing ring to the depths of the internal thread, the internal piece inserted into the storage portion can be reliably tightened and fixed.

Furthermore, the inner thread of the annular outer conductor of the connector seat is used not only for tightening and fixing the inner piece by screwing in the inner piece fixing ring, but also as a threaded part for screwing in the connector for connecting the coaxial cable. 1. Only the internal thread part is threaded on the seat.
This simplifies the processing of the plug seat that is formed integrally with the housing, and can significantly reduce costs compared to conventional plug devices in which the plug seat is made separately from the housing.

[Brief explanation of the drawing]

Fig. 1 is an explanatory cross-sectional view showing one embodiment of the present invention, Fig. 2 is a cross-sectional view taken out of the housing in which the plug seat in Fig. 1 is integrally formed, and Fig. 3 is the same as Fig. 1. FIG. 4 is a sectional view taken out from the inner piece fixing ring of FIG. 3, and FIG. 5 is a half sectional view showing the inner piece of FIG. 1 taken out. 1: Housing, 2: Plug seat annular outer conductor, 3: Internal threaded part, 4: Internal piece storage part, 5: Center contact, 6: Internal piece, 7: Stop part, 8: Internal piece fixing ring, 9 : Coaxial cable, 12: External threaded part, 13: Relief part, 14: Jig mounting hole, 15, 1
6, 17: Insulator, 18, 19: O-ring.

Claims (1)

[Scope of utility model registration request] An internal threaded portion that protrudes from a casing that accommodates the circuit section and integrally forms a plug seat annular outer conductor, and a coaxial cable connection plug is threadedly connected to the inner periphery of the plug seat annular outer conductor from the outside. At the same time, an accommodating portion having a smaller diameter than the internal threaded portion for accommodating an internal piece consisting of a center contact and an insulator is formed on the side of the casing following the internal threaded portion, and the accommodating portion accommodates the internal piece from the outside. Screwing and tightening an inner piece fixing ring to the inner threaded part, the inner piece fixing ring having a stopper that is inserted and stopped at a predetermined position, and an outer threaded part that is threaded into the inner threaded part and a relief part having a smaller diameter than the outer threaded part. A coaxial cable connection socket, characterized in that the internal piece is fixed to a storage part by doing so.