JP3510355B2 - Bayonet pins and coaxial connectors - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in pin for a coaxial connector, and a coaxial connector for connecting a coaxial cable in which the plug-in pin is incorporated in a shaft center portion.

[0002]

2. Description of the Related Art Conventionally, a conventional insertion pin for a coaxial connector is provided with a soldering portion at its base end, and a center conductor of a coaxial cable is soldered thereto. In the case of this structure, the soldering state is apt to vary, there is a problem in reliability, and there is a problem that a great deal of labor is required for the soldering work.
In order to solve such a problem, there has been proposed a method in which a U-shaped groove for inserting a conductor is formed in the base end portion of the insertion pin, and the center conductor of the coaxial cable is inserted into the groove and crimped. ing.

[0003]

The above-mentioned crimping type is superior in workability to the soldering type and has an advantage that a relatively stable connection can be made.
If the center conductor to be sandwiched is a single core, the surface of the center conductor may be damaged by the edge portion of the groove for sandwiching the conductor. In particular, when the insertion pin is made by pressing a plate material, the edge portion of the groove is sharp, so that the scratch is considerably deep. If such scratches occur, the degree of damage may progress due to aging over a long period of use, and there is a risk of breaking due to vibration or the like.

An object of the present invention is to provide the following bayonet pin and coaxial connector. (a) A plug-in pin for a coaxial connector, which can be easily and accurately connected to a cable conductor, and which can maintain a highly reliable connection state for a long period of time without fear of damaging the conductor.

(B) A coaxial connector that can be easily repaired even when a connection failure with the coaxial cable occurs.

[0006]

In order to solve the above problems and achieve the object, the insertion pin and the coaxial connector of the present invention are configured as follows.

(1) In the insertion pin of the present invention, the base end of the round wire for forming the insertion pin is wound to form a coil-shaped holding portion,
The central conductor of the coaxial cable can be sandwiched between the adjacent winding portions of the coil-shaped sandwiching portion.

(2) The coaxial connector according to the present invention comprises:
And a cylindrical conductor having a connecting portion which is coaxially insulated and surrounded by the inserting pin, and has a connecting portion connectable to the outer conductor of the coaxial cable at the base end, and the entire outer circumference of the cylindrical conductor is covered. As described above, the insulating cylindrical body is fitted and has a mounting portion for mounting to the outer periphery of the coaxial cable at the base end portion.

[0009]

As a result of taking the above measures (1) and (2), the following effects occur.

(1) The coil-shaped sandwiched portion formed by winding the base end of the round conductor wire has no edge portion at all, and in the usual case, it has an extremely smooth curved surface. Even if the center conductor sandwiched between the winding portions is a single-core conductor, the conductor surface is not scratched, and even if it is used for a long period of time, there is no risk of disconnection or the like due to the scratch. In addition, since the winding parts of the coil-shaped clamping part are naturally connected to each other, when inserting the center conductor of the coaxial cable between the winding parts of the coil-shaped clamping part, insert it. The depth positioning operation does not have to be performed specially, and it is sufficient to simply push in the deepest part between the winding parts. By doing so, the central conductor stops when it reaches the winding portion existing in the innermost portion. Therefore, the workability is good, and the contact area between the coil-shaped sandwiching portion and the central conductor is large.

(2) When a connection failure with the coaxial cable occurs, the coaxial connector is disassembled, and then the center conductor is clamped in the coil-shaped clamp portion of the insertion pin.
The connection is completed by crimping the connecting portion of the cylindrical conductor to the outer conductor. In other words, the user can easily repair without soldering, which is preferable from the economical point of view.

[0012]

【Example】

(First Embodiment) FIG. 1 is a view showing the structure of an insertion pin according to the first embodiment of the present invention. FIG. 1 (a) shows a central conductor of a coaxial cable sandwiched and connected to a coil-shaped clamping portion of the insertion pin. A perspective view showing a state, (b) is a side view of the insertion pin, and (c) is an end view of the insertion pin.

As shown in (a), (b) and (c) of FIG.
In the insertion pin 10 for the coaxial connector of this embodiment, the tip of the insertion pin forming round conductor wire is formed into a linear insertion portion 11,
Turn the base end of the round conductor several turns (two turns in this embodiment).
It is wound to form the coil-shaped holding portion 12. The coil-shaped holding portion 12 has a coaxial cable 2 to be connected between the adjacent winding portions 12a and 12b by its elastic restoring force.
The zero center conductor 21 is provided so as to be sandwiched by a predetermined pressure. The coaxial cable 20 has a well-known structure. The outer periphery of the center conductor 21 is covered with an inner insulating layer 22, and the outer periphery is covered with an outer conductor 23 made of a braided wire for shielding.
The outermost periphery is covered with the outer insulating layer 24.

As a material for forming the insertion pin 10, for example, a round conductor wire made of brass or phosphor bronze having a diameter D1 of about 0.8φ is used, and the length L1 of the linear insertion portion 11 is set to about 13 mm. , The diameter D of the coil-shaped clamping portion 12
2 is set to about 3.5φ. Further, the gap G between the adjacent winding portions 12a and 12b of the coil-shaped sandwiching portion 12 has a diameter of the center conductor 21 of the coaxial cable 20 of 0.5.
If φ, it is set to about 0.3 mm.

(Second Embodiment) FIG. 2 is a view showing the arrangement of a coaxial connector according to the second embodiment of the present invention. FIG. 2 (a) is a coaxial connector having the insertion pin 10 shown in FIG. Connector 3
0 is a sectional view showing the structure of No. 0, and (b) is a side view of the coaxial connector 30.

As shown in FIG. 2, the linear insertion portion 11 of the insertion pin 10 is inserted through the center hole of the cylindrical insulating member 31. The center conductor 21 of the coaxial cable 20 is sandwiched between the adjacent winding portions 12a and 12b of the coil-shaped sandwiching portion 12 of the insertion pin 10 and is provided on the base end surface of the cylindrical insulating member 31. It is accommodated in the recess 32. A cylindrical conductor 33 is fitted on the outer periphery of the insulating member 31 so as to surround the insertion pin 10 coaxially in an insulated state. A connection portion 34 made of a small piece is provided at the base end portion of the cylindrical conductor 33, and the connection portion 34 is connected to the outer conductor 23 of the coaxial cable 20 by means of crimping or the like. To cover the entire outer circumference of the cylindrical conductor 33,
The large diameter portion 35a of the insulating tubular body 35 is fitted. At the base end of the insulating tubular body 35, a small-diameter portion 35 as a mounting portion is attached.
b is provided. The small diameter portion 35b is fitted to the outer circumference of the end portion of the coaxial cable 20, and is fixed to the coaxial cable 20 by caulking or the like.

The present invention is not limited to the above embodiment. For example, in the above-mentioned embodiment, the present invention is applied to a coaxial connector having a straight straight tube shape, but the present invention is also applicable to an L-shaped coaxial connector in which the cylinder body is bent at a right angle. Is. Further, the number of winding turns of the coil-shaped sandwiching portion can be set arbitrarily. Further, the shape of the winding portion of the coil-shaped sandwiching portion does not necessarily have to be a perfect circle, and may be an elliptical shape or the like.

(Summary of Embodiments) The constructions and effects of the insertion pin and the coaxial connector shown in the embodiments are summarized as follows.

[1] Insertion pin 10 shown in the embodiment
Is a coil-shaped sandwiching portion 12 formed by winding the base end of the insertion pin forming round conductor wire, and the center conductor of the coaxial cable 20 is formed between the adjacent winding portions 12a and 12b of the coil-shaped sandwiching portion 12. 21 can be sandwiched.

Therefore, in the insertion pin 10, not only the edge portion does not exist in the coil-shaped holding portion 12 around which the base end of the round conductor wire is wound, but also in the usual case, an extremely smooth curved surface is exhibited. Therefore, the adjacent winding part 1
Even if the central conductor 21 sandwiched between 2a and 12b is a single-core conductor, the conductor surface is not scratched, and even if it is used for a long period of time, there is a risk of disconnection or the like due to the scratches. There is no. Further, the winding portion 1 of the coil-shaped holding portion 12
Since 2a and 12b are naturally continuously connected to each other, when the center conductor 21 of the coaxial cable 20 is pushed between the winding portions 12a and 12b of the coil-shaped holding portion 12, The insertion depth positioning operation does not have to be performed specially, and it is sufficient to simply push in the deepest part between the winding parts 12a and 12b. By doing so, the central conductor 21 stops when it reaches the winding portion existing in the innermost portion. Therefore, the workability is good, and the contact area between the coil-shaped holding portion 12 and the central conductor 21 is large.

[2] Coaxial connector 30 shown in the embodiment
Is the insertion pin 10 described in the above [1] and the connection portion 3 which surrounds the insertion pin 10 by coaxially insulating it and which is connectable to the outer conductor 23 of the coaxial cable 20 at the base end.
4 and a cylindrical conductor 33 fitted so as to cover the entire outer circumference of the cylindrical conductor 33 and provided with a mounting portion 35b for mounting on the outer circumference of the coaxial cable 20 at the base end. It is configured.

Therefore, in the above-mentioned coaxial connector 30, when a connection failure or the like occurs at the connection portion with the coaxial cable 20, the coaxial connector 30 is disassembled and then the insertion pin 10 is removed.
The connection is completed by sandwiching the central conductor 21 in the coil-shaped sandwiching portion 12 and crimping the connecting portion 34 of the cylindrical conductor 33 to the outer conductor 23. In other words, the user can easily repair without soldering, which is preferable from the economical point of view.

[0023]

According to the present invention, the following insertion pin and coaxial connector can be provided.

(A) A cable conductor can be easily and accurately connected, and there is no fear of damaging the conductor.
Insertion pin for coaxial connector that can maintain a highly reliable connection state for a long period of time.

(B) A coaxial connector that can be easily repaired even if a connection failure with the coaxial cable occurs.

[Brief description of drawings]

FIG. 1 is a view showing a configuration of an insertion pin according to a first embodiment of the present invention, (a) is a perspective view showing a state where a center conductor of a coaxial cable is sandwiched and connected to a coil-shaped sandwiched portion of the insertion pin. ,
(B) is a side view of the insertion pin, (c) is an end view of the insertion pin.

2A and 2B are views showing a coaxial connector according to a second embodiment of the present invention, FIG. 2A is a sectional view showing the structure of a coaxial connector incorporating the insertion pin shown in FIG. 1, and FIG. Side view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Insertion pin 11 ... Linear insertion part 12 ... Coil-shaped clamping part 12a, 12b ...
Winding portion 20 ... Coaxial cable 21 ... Center conductor 22 ... Inner insulating layer 23 ... Outer conductor 24 ... Outer insulating layer 30 ... Coaxial connector 31 ... Insulating member 32 ... Recessed portion 33 ... Cylindrical conductor 34 ... Connecting portion 35 ... Insulating cylinder Body 35a ... Large diameter portion 35b ... Small diameter portion

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Claims (2)

(57) [Claims] 1. A round conductor for forming an insertion pin is wound around to form a coil-shaped sandwiching portion, and a center conductor of a coaxial cable can be sandwiched between adjacent winding portions of the coil-shaped sandwiching portion. The insertion pin for the coaxial connector characterized in that 2. A plug-in pin according to claim 1, a cylindrical conductor that coaxially insulates and surrounds the plug-in pin, and has a connecting portion at a base end portion that can be connected to an outer conductor of a coaxial cable, A coaxial connector, comprising: an insulating cylindrical body that is fitted to cover the entire outer circumference of a cylindrical conductor, and has a base end provided with a mounting portion for mounting to the outer circumference of the coaxial cable.