JP3164803B1 - Coaxial outlet - Google Patents

Abstract

An object of the present invention is to provide a coaxial outlet for connecting a plug connected to a coaxial cable while matching characteristic impedance. A coaxial outlet 20 for connecting a plug provided with a fastening means attached to a coaxial cable, wherein a conductor pin 12 having substantially the same diameter (≒ φ1) as a central conductor of the coaxial cable is inserted through a central axis. A cylindrical insulator 13 having substantially the same diameter (≒ φ2) as the insulator 5 of the coaxial cable is
2 is substantially the same as the outer diameter of the insulator 5 of the coaxial cable, and the outer diameter φ3 on the connection side is substantially the same as the inner diameter of the concave portion of the connecting portion of the plug. In addition, a protrusion 12b is provided on the outer periphery of the conductor pin 12, and the second insulator 19 is provided on the device-side end surface of the coaxial outlet main body 11, and the device connection side of the conductor pin 12 is provided on the center axis thereof. Projection 12b while being inserted
Is fixed by caulking the peripheral edge 16 so as to be held between the insulator 13 and the insulator 13, and a flange 17 having a mounting hole 18 is further provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial socket (receptacle, receptacle) for mounting a coaxial plug attached to a distal end of a coaxial cable to a device-side chassis or a substrate for connecting the same to a device or a substrate. The present invention relates to a high-frequency coaxial outlet that can be easily and firmly connected with ideally matched characteristic impedance.

[0002]

2. Description of the Related Art For transmitting high-frequency signals, a central conductor composed of a single conductor, an insulator surrounding the central conductor such as Teflon, phenol resin, styrene, polyethylene, etc., and a copper net surrounding the insulator are generally used. And outer conductor of copper tape,
A coaxial cable consisting of an insulating sheath is used. The characteristic impedance of the coaxial cable is determined by the diameter of the center conductor, the inner diameter of the outer conductor, and the dielectric constant of an insulator therebetween. The characteristic impedance of a general coaxial cable is roughly classified into two types, 50Ω and 75Ω. There are seeds.

The present inventor has proposed a coaxial connector comprising a plug and a jack used for connecting the coaxial cables.
The end faces of the central conductors of the coaxial cables which directly face each other without connecting terminals are brought into conductive contact with each other, and the external conductors are conductively connected via a tubular member which connects the external conductors without substantially changing their inner diameters. A new and easy-to-use coaxial connector that achieves ideal characteristic impedance matching of the structure has been developed (Japanese Patent Application No. 11-341666).

FIG. 3 is a sectional view of a plug 50 connected to an end of a coaxial cable D1 as an example of the coaxial connector, and FIG. 4 is an example of a jack 60 connected to an end of a coaxial cable D2 opposite to the plug 50. FIG.

Each coaxial cable D1, D in the concave portion 28 of the plug 50 and the convex portion 48a of the jack 60
The two insulators 5 and the end faces 8a of the center conductor 8 are brought into conductive contact by fitting the concave portions 28 and the convex portions 48a. As a fastening means for firmly fixing the fitting between the concave portion 28 and the convex portion 48a, the second shell 27 formed of an annular wall 27a (having a shape like a collet) provided with a split groove on the connection end side of the plug 50. A second shell 48 fitted on the connection end side of the jack 60 with the concave portion 28 of the second shell 27 of the plug 50; and a cylinder mounted on the outer periphery of the plug 50 to form a female screw of the screw portion 32. And a collet cap 33 rotatably pivoted with a base 30 having a tapered portion T for tightening the annular wall 27a of the recessed conductive member on the inner peripheral surface. Of the plug 50 and the convex portion 4 of the jack 60 so that
8a, the main body 29 of the collet cap 33 in the plug 50 is
As it is turned at 2, the base 30 retreats in the direction of arrow Z, and the tapered portion T tightens the annular wall 27a to strongly press the outer periphery of the convex portion 48a of the jack 60. Thus, the concave portion 28 on the plug 50 side and the convex portion 48a on the jack 60 side are firmly fixed and there is no possibility of loosening. As a result, by using the plug 50 and the jack 60 of the present coaxial connector, the connection of the coaxial cable is highly reliable and the ideal characteristic impedance is matched (the center conductors 8 are directly connected to each other, and the inner diameter of the outer conductor 4 does not change). In the meantime, it is filled with the insulator 5 and the dielectric constant does not change.) Can be realized by a simple operation that does not require soldering.

[0006]

The ideal connection between the coaxial cables is realized by a coaxial connector including the plug 50 and the jack 60. However, when the coaxial cable is connected to a device-side chassis, a board, or the like, the above-described plug is used. Of course, the combination of 50 and jack 60 cannot be realized.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a coaxial outlet having a novel structure which is compatible with the plug of the coaxial connector of the invention of Japanese Patent Application No. 11-341666. It is in.

[0008]

In order to achieve the above object, the present invention provides: (1) a coaxial structure comprising a center conductor, an insulator surrounding the center conductor, an outer conductor surrounding the insulator, and an insulating sheath. A coaxial outlet for connecting a coaxial plug having a fastening means attached to an end of a cable to a device, a board, or the like, wherein a conductor pin having substantially the same diameter as a center conductor of the coaxial cable is inserted through a center axis. A cylindrical insulator having an inner diameter substantially equal to the outer diameter of the insulator of the coaxial cable and an outer diameter on the connection side substantially equal to the inner diameter of the connection portion of the coaxial plug is formed by forming a cylindrical insulator having substantially the same diameter as the insulator of the coaxial cable. A coaxial outlet characterized by being fitted and fixed in a coaxial outlet main body provided with a conductor metal connecting portion. (2) In addition, a protrusion is provided on the outer periphery of the conductor pin, and a cylindrical second insulator is inserted into the end face of the coaxial socket body on the device side, and the conductor pin is inserted through the device connection side of the conductor pin through the center axis. The coaxial outlet according to the above (1), wherein the protrusion is disposed and fixed so as to be held between the insulator and the insulator. (3) As a preferred aspect, the present invention provides the coaxial outlet according to the above (1) or (2), wherein a thread is threaded on an outer periphery of the coaxial outlet main body on the device side. Is what you do. (4) As a further preferred aspect of the present invention, there is provided the coaxial outlet according to the above (1), (2) or (3), wherein a flange is provided on an outer periphery of the coaxial outlet main body. I do.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view of a coaxial outlet 20 according to the present invention, and FIG. 2 is a sectional view of the coaxial outlet 20 according to the present invention.
FIG. 5 is a cross-sectional view showing a state in which the plug 50 to which a coaxial cable D1 is attached is connected.

The coaxial outlet 20 shown in FIG. 1 comprises a center conductor 8 as shown in FIG. 3, an insulator 5 surrounding the center conductor 8, an outer conductor 4 surrounding the insulator 5, and an insulating sheath. 3 is a coaxial outlet for connecting a coaxial plug 50 provided with a fastening means attached to an end of a coaxial cable D1 to a device, a board or the like, and is substantially the same as the center conductor 8 of the coaxial cable D1. Conductor pin 1 of diameter (≒ φ1)
2 of the coaxial cable D1 inserted through the center axis 2
A cylindrical insulator 13 having substantially the same diameter (≒ φ2) as
Is substantially equal to the outer diameter of the insulator 5 of the coaxial cable D1, and the outer diameter φ3 of the connection side is the concave portion 28 of the connection portion of the coaxial plug 50.
Has a basic structure in which it is fitted and fixed in a coaxial outlet main body 11 provided with a cylindrical conductor metal connection portion 15 substantially equal to the inner diameter of the same.

With the above structure, as shown in FIG.
Connection 1 between recess 28 of plug 50 and coaxial outlet 20
5 is tightly fitted, and when the main body 29 of the collet cap 33 in the plug 50 is turned by the screw portion 32 with respect to the second shell 27, the base 30 retreats in the direction of arrow Z. The tapered portion T tightens the annular wall 27 a and strongly presses the outer periphery of the connection portion 15 of the coaxial outlet 20. Thus, the concave portion 28 on the plug 50 side and the connecting portion 15 on the coaxial outlet 20 side are firmly fixed, and the distal end surface 8a of the center conductor 8 of the coaxial cable D1 and the distal end surface 12a of the conductor pin 12 are brought into conductive contact. The conductor 4 is also conductively connected to the coaxial outlet main body 11 without changing its inner diameter, and the insulator 5 and the insulator 13 are made of the same material (for example, polyethylene) and have the same dielectric constant. A disconnected connection is realized at least up to the coaxial outlet main body 11.

In addition, in the coaxial outlet 20 shown in FIG.
(E.g., flange) and coaxial outlet body 1
A second insulator 19 having a columnar shape is provided on the end face of the device 1 on the side of the device, and the conductor pin 12 is connected to the device connection side (coaxial cable D
Since the tip is a soldered portion rather than the connection side with the connector 1, the diameter is slightly larger. ) Is inserted and inserted, and the peripheral edge 16 of the end face of the coaxial outlet main body 11 is arranged and fixed so as to hold the projection 12b of the conductor pin 12 between the insulator 13 and the like. . With this structure, a problem that the conductor pin 12 falls out of the insulator 13 is prevented. The conductor pin 12 is preferably a sawn material such as gold-plated brass, and the coaxial outlet main body 1
1 is made of brass. The insulator 13 is, for example, polyethylene commonly used as the insulator 5 of the coaxial cable, and the second insulator 19 is a solder connection portion 12 at the end of the conductor pin 12.
Since T is close to c, Teflon having good heat resistance is suitable.

Further, in the coaxial outlet 20, a screw thread 14 is threaded on the outer periphery of the coaxial outlet main body 11 on the device side as a more preferable mode, so that it can be easily attached to a chassis or a substrate on the device side with a nut. ing. In addition, a flange 17 is provided on the outer periphery of the coaxial outlet main body 11, and a coaxial outlet 20 is inserted through the mounting hole 18.
Can be easily screwed.

It should be noted that the coaxial cable D1
The tip end face 8a of the center conductor 8 with the insulating sheath 3 stripped off and the tip end face 12a of the conductor pin 12 inserted through the insulator 13 slightly protrude from the tip face of the surrounding insulator 5 or insulator 13 (0.5 mm). Is preferred for reliable conductive contact.

The coaxial cable D1 to be connected can be applied not only to a flexible cable but also to a semi-rigid cable, and also to a coaxial cable having a characteristic impedance other than 50Ω or 75Ω if the shape, material and inner and outer diameters are matched. Needless to say,

[0017]

As is apparent from the above description, the coaxial outlet according to the present invention has the following features. (1) The center conductor of the coaxial cable is brought into direct conductive contact,
In addition, since the insulator and the external conductor are continuously connected to each other with the same diameter, characteristic impedance matching is ideally performed, and reflection generated at the coaxial outlet during transmission of a high-frequency signal can be reduced. (2) Further, the coaxial cable and the coaxial outlet are easily and firmly connected to each other, so that there is no possibility that the coaxial cable and the coaxial cable come out, and the reliability is high.

[Brief description of the drawings]

FIG. 1 is a sectional view of a coaxial outlet according to the present invention.

FIG. 2 is a sectional view showing a state in which a plug having a coaxial cable attached thereto is connected to the coaxial outlet according to the present invention.

FIG. 3 is a sectional view showing an example of a plug of a coaxial connector used for a coaxial outlet according to the present invention.

FIG. 4 is a cross-sectional view showing an example of a jack which is a companion to a plug of the coaxial connector.

[Explanation of symbols]

REFERENCE SIGNS LIST 3 insulating outer cover 4 outer conductor 5 insulator 8 center conductor 8 a distal end surface 11 coaxial outlet main body 12 conductive pin 12 a distal end surface of conductive pin 12 b protrusion of conductive pin 12 c soldered portion of conductive pin 13 insulator 14 thread 15 connection portion 16 Peripheral edge of end face of coaxial outlet main body (caulking portion) 17 Flange 18 Mounting hole 19 Second insulator 20 Coaxial outlet 27, 48 Second shell 27a Annular wall 28 Concave part 29 Main body part 30 Base 33 Collet cap 48a Convex part 50 Plug 60 Jack D1, D2 Coaxial cable T Taper

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 13/646 H01R 9/05 H01R 24/02 H01R 103: 00

Claims (4)

(57) [Claims] 1. A center conductor, an insulator surrounding the center conductor,
A coaxial outlet for connecting a coaxial plug having fastening means attached to an end of a coaxial cable comprising an outer conductor surrounding the insulator and an insulating sheath to a device, a board, or the like, wherein the coaxial cable is Center conductor tip and end
A cylindrical insulator having substantially the same diameter as the insulator of the coaxial cable, in which a conductor pin having substantially the same diameter and whose surface is in contact conduction is inserted through the central axis, is connected to the insulator having an inner diameter substantially equal to the outer diameter of the insulator of the coaxial cable. A coaxial outlet fitted and fixed in a coaxial outlet main body having a cylindrical conductor metal connection part whose outer diameter on the side is substantially equal to the inner diameter of the connection part of the coaxial plug. 2. A protruding portion is provided on the outer periphery of the conductor pin, and a cylindrical second insulator is inserted into the device-side end surface of the coaxial outlet main body while the device connection side of the conductor pin is inserted around the center axis of the second insulator. The coaxial outlet according to claim 1, wherein the protrusion is disposed and fixed so as to be held between the insulator and the insulator. 3. The coaxial outlet according to claim 1, wherein a screw thread is threaded on an outer periphery of the coaxial outlet main body on a device side. 4. The coaxial outlet according to claim 1, wherein a flange is provided on an outer periphery of the coaxial outlet main body.