JP2006164791A - Coaxial connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial connector small in size and height, excelling in a high-frequency transmission characteristic, and easily connectable to a coaxial cable. <P>SOLUTION: A terminal 2 of this coaxial connector 1 is so structured that the extension direction of a center conductor 21 of a coaxial cable 20 in a wire connection part 2a is nearly perpendicular to the insertion direction into a mating connector 10; and the wire connection part 2a is provided with a tongue-like connection piece 2c for pressing the center conductor 21 of the coaxial cable 20 that is so bent as to be folded back in assembly. An insulator 3 includes: a body part 3b with a hollow part 3a for housing a contact part 2b of the terminal 2 formed therein; and an inner lid insulation part 3c arranged nearly vertically to the upper surface of the body part 3b for pressing the connection piece 2c and the wire connection part 2a of the terminal 2 when bent in assembly. An external conductor 4 includes: a tubular part 4a for housing the body part 3b of the insulator 3; and an outer lid part 4b formed by being extended from the tubular part 4a for applying pressing force to the inner lid insulation part 3c in bending it. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a coaxial connector, and more particularly to a coaxial connector with improved high-frequency transmission characteristics.

  Conventionally, as a connection structure between the terminal of the coaxial connector and the central conductor of the coaxial cable, for example, Patent Document 1 describes that the central conductor is placed on a flat portion on the upper surface of the terminal and soldered. Patent Document 2 describes that the central conductor is sandwiched between substantially rectangular plate springs provided on the upper surface of the terminal.

JP 2001-43939 A JP 2002-324636 A

  In order to improve the high-frequency transmission characteristics of the coaxial connector, it is necessary to make the distance between the terminal connected to the center conductor and the outer conductor constant. In the conventional connection structure, for example, when the center conductor is soldered at the flat part on the upper surface of the terminal, the height after soldering tends to vary, and in order to keep it constant, the amount of solder must be set with high accuracy. It was necessary to manage, which was a factor of cost increase. In addition, in the case where the center conductor is sandwiched between the upper surfaces of the terminals by a substantially rectangular plate spring, the distance from the outer conductor is not constant because of the shape, and the high-frequency transmission characteristics are limited.

  That is, an object of the present invention is to provide a coaxial connector that can be easily connected to a coaxial cable with a small size and low profile and good high frequency transmission characteristics.

  A coaxial connector according to the present invention includes a terminal having a connection portion to which a central conductor of a coaxial cable is connected and a corresponding contact portion of a mating connector, an insulator for supporting the terminal, and the insulation A coaxial connector including an outer conductor supported so as to wrap the body and connected to an outer shield conductor portion of the coaxial cable; and an extension direction of the central conductor at a connection portion of the terminal and an insertion direction to the mating connector; Is formed at a substantially right angle, and a tongue-like connection piece is extended from one end of the connection portion on the extension line of the central conductor, and the connection piece is bent so as to be folded at the one end to serve as the central conductor of the coaxial cable. The insulator is sandwiched between the connection portions, and the insulator is changed so as to press the connection piece connected to one side of the main body portion formed with a hollow portion for accommodating the contact portion of the terminal. The outer conductor is formed to extend from the tubular portion and accommodate the body portion of the insulator, and the inner cover is insulated when connected to the coaxial cable. And an outer lid portion for applying a pressing force so that the portion approaches the direction of the central conductor.

  The connection piece may be soldered in a state where the central conductor is sandwiched between the connection portions.

  The connecting piece may be welded in a state where the central conductor is sandwiched between the connecting portion.

  As described above, the coaxial connector of the present invention has a structure in which a tongue-like connection piece is provided at one end of the upper surface of the terminal, the connection piece is bent so as to be folded, the center conductor of the coaxial cable is pressed, and sandwiched and connected. Thereby, it is possible to connect the terminal and the central conductor while keeping the distance between the terminal and the outer conductor substantially constant. The terminal and the center conductor may be connected by soldering and then the connection piece may be bent and connected to the center conductor, or the connection piece may be bent and connected by means such as welding with the center conductor sandwiched therebetween.

  In the present invention, the extension direction of the center conductor and the insertion direction to the mating connector are substantially perpendicular, a tongue-like connection piece is provided at one end of the upper surface of the terminal, and the connection piece is bent so as to be folded back. Since the center conductor is pressed and connected, a general construction method can be used, and without increasing the cost, the distance between the terminal after assembly of the coaxial connector and the outer conductor can be kept substantially constant, A coaxial connector having a small size and a low profile and excellent high frequency characteristics can be provided.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view including a fractured surface, showing a connection state between a coaxial connector and a mating connector in an embodiment of the present invention. The fractured surface is a central axis of mounting with the mating connector and the center of the coaxial cable. It is a plane that passes through the axis. FIG. 2 shows a coaxial connector and a mating connector in an embodiment of the present invention, and FIG. 2 (a) is a perspective view including a fracture surface, showing the coaxial connector of the present invention connected to a coaxial cable. FIG. 2B is a perspective view showing a mating connector including a fracture surface.

  As shown in FIGS. 1 and 2, the coaxial connector 1 includes a terminal 2 having a connection portion 2 a to which the central conductor 21 of the coaxial cable 20 is connected and a contact portion 2 b to be connected to and contacted with a corresponding contact portion 11 a of the mating connector 10. An insulator 3 that supports the terminal 2 so as to surround the terminal 2 and an outer conductor 4 that houses the insulator 3 are provided.

  Here, in the terminal 2 of the coaxial connector 1, the extending direction of the central conductor 21 of the coaxial cable 20 in the connection portion 2 a and the insertion direction to the mating connector 10 are substantially perpendicular, and in the vicinity of the connection portion 2 a. Has a tongue-like connecting piece 2c that presses and connects the central conductor 21 of the coaxial cable 20 when bent by assembly. FIG. 3 shows only the terminal 2 in a perspective view. Note that the terminal 2 shown in FIGS. 1 and 2 (a) is drawn with a fractured surface only at the connection piece 2c. The terminal 2 is preferably processed using a copper alloy band metal material, and the contact portion 2b is preferably plated with gold. As shown in FIG. 2 (a), the insulator 3 is disposed substantially vertically on the main body 3b in which the hollow portion 3a for accommodating the contact portion 2b of the terminal 2 is formed, and on the upper surface of the main body 3b, and is bent during assembly. Then, it has a connecting piece 2c of the terminal 2 and an inner lid insulating portion 3c that applies a pressing force to the connecting portion 2a, and is molded with a dielectric resin. Further, the outer conductor 4 is formed to extend from the tubular portion 4a for accommodating the main body portion 3b of the insulator 3, and to apply a pressing force for pushing down the inner lid insulating portion 3c when the assembly is bent. The outer cover portion 4b is contacted and connected to the outer shield conductor portion 23. Preferably, the outer conductor 4 is processed by using a strip metal material, and the entire outer conductor 4 is plated with gold or silver. desirable.

  On the other hand, the mating connector 10 includes a mating connector terminal 11 having a corresponding contact portion 11 a that contacts the contact portion 2 b of the terminal 2 of the coaxial connector 1, and a mating connector external conductor 13 that engages with the tubular portion 4 a of the external conductor 4. The mating connector terminal 11 and the mating connector base 12 that electrically insulates the mating connector external conductor 13 are configured.

  Further, the coaxial cable 20 generally surrounds a central conductor 21 which is a conductor of the central portion with an internal insulator 22, and further surrounds the internal insulator 22 with an external shield conductor portion 23. It is surrounded by the jacket portion 24. When electrically connecting the central conductor 21 of the coaxial cable 20 to the coaxial connector 1, as shown in FIG. 1 or 2, each part of the central conductor 21, the inner insulator 22, and the outer shield conductor portion 23 is respectively connected. Use it exposed in steps.

The coaxial connector of this embodiment having these configurations is assembled and used in the following manner.
(1) Place the central conductor 21 of the coaxial cable 20 exposed in a stepped shape on the connection part 2a of the terminal 2, bend the connecting piece 2c so as to sandwich the central conductor 21, and crimp the terminal 2 to the terminal 2 Connecting.
(2) Note that the connecting piece 2c may be bent after the central conductor 21 is soldered at the connecting portion 2a, or may be welded by ultrasonic waves, electric welding, or the like after the central conductor 21 is pressed by the connecting piece 2c. Well, this can increase the connection strength.
(3) The terminal 2 to which the coaxial cable 20 is connected is attached to the hollow portion 3a of the insulator 3.
(4) The insulator 3 on which the terminal 2 is mounted is mounted on the cylindrical portion 4a of the outer conductor 4.
(5) The outer lid portion 4b of the outer conductor 4 is bent to close the upper portion of the cylindrical portion 4a, and the insulator 3 to which the terminal 2 is attached is fixed. At this time, by bending the outer lid portion 4b, the middle lid insulating portion 3c of the insulator 3 is also bent at the same time, and the connecting piece 2c and the connecting portion 2a of the terminal 2 are pressed. That is, the inner lid insulating portion 3c is sandwiched between the connection portion 2a and the outer lid portion 4b.
(6) The outer lid portion 4b is further brought into contact with the exposed outer shield conductor portion 23 of the coaxial cable 20, and is firmly fixed by caulking, soldering or the like. In addition, it is desirable that the end portion of the outer lid portion 4b is further caulked to the jacket portion 24 to increase the bonding strength between the coaxial connector 1 and the coaxial cable 20.

The perspective view including the fracture surface which shows the connection state of the coaxial connector and other party connector in one embodiment of this invention. FIG. 2A shows a coaxial connector and a mating connector according to an embodiment of the present invention. FIG. 2A shows a coaxial connector to which a coaxial cable is connected, a perspective view including a fracture surface, and FIG. 2B shows a mating connector. The perspective view containing a torn surface. The perspective view which shows the terminal which concerns on one embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coaxial connector 2 Terminal 2a Connection part 2b Contact part 2c Connection piece 3 Insulator 3a Hollow part 3b Main body part 3c Inner lid insulation part 4 Outer conductor 4a Cylindrical part 4b Outer cover part 10 Counterpart connector 11 Counterpart connector terminal 11a Corresponding contact part 12 Mating Connector Base 13 Mating Connector Outer Conductor 20 Coaxial Cable 21 Center Conductor 22 Inner Insulator 23 Outer Shield Conductor 24 Outer Cover

Claims (3)

  A terminal having a contact portion to be contacted and connected to a corresponding contact portion of a coaxial cable and a corresponding contact portion of a mating connector; an insulator supporting the terminal; and supporting and supporting the insulator. In the coaxial connector comprising an outer conductor connected to the outer shield conductor portion of the coaxial cable, the extending direction of the central conductor at the connection portion of the terminal and the insertion direction to the mating connector form a substantially right angle, A tongue-like connection piece extends from one end of the connection portion on the extension line of the center conductor, and the connection piece is bent so as to be folded back at the one end, and the central conductor of the coaxial cable is placed between the connection portion and the connection portion. The insulator includes a main body portion in which a hollow portion for accommodating the contact portion of the terminal is formed, and an inner lid insulating portion that is connected to one side of the main body portion and is deformed so as to press the connection piece. Shi The outer conductor is formed to extend from the cylindrical portion that accommodates the main body portion of the insulator, and closes the inner lid insulating portion toward the central conductor when connected to the coaxial cable. A coaxial connector having an outer lid portion for applying a pressing force as described above.   The coaxial connector according to claim 1, wherein the connection piece is soldered in a state in which the center conductor is sandwiched between the connection pieces.   The coaxial connector according to claim 1, wherein the connection piece is welded in a state in which the central conductor is sandwiched between the connection portion.

Images