JP2011253625A - Coaxial cable connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coaxial cable connector which can connect coaxial cable connectors each other without damaging high frequency properties in a limited narrow space of a structure.SOLUTION: A coaxial cable connector comprises a plug connector 2 and a jack connector 6 which are connected to each other. The plug connector 2 comprises a plug body 20 attached to a terminal of a coaxial cable 1, a coupling nut 5 which is rotatably installed on a circumference of the plug body 20 and fastens and connects the plug connector 2 and the jack connector 6, and a center contact 3 which is placed in the center of the plug body 20 and is electrically conductive with an inner conductor of the coaxial cable 1. When the plug connector 2 is butted with the jack connector 6, the coupling nut 5 is installed movably along the axial direction on the plug body 20 so that peripheries of the plug connector 2 and the jack connector 6 are exposed.

Description

  The present invention relates to a coaxial cable connector that constitutes an antenna for UHF band communication, a cellular phone base station, and a broadcasting antenna, in which frequency characteristics are particularly important, such as wireless communication / measurement equipment.

  In recent years, the demand for mobile phones has spread all over the world, and there is a demand for lower cost and higher reliability of wireless communication than ever before. High-frequency technology has been applied in various situations, and high-frequency coaxial cables and plugs to realize their wiring (connectors attached to the coaxial cable, classified as plugs and jacks depending on the shape of the opening) Many kinds of things have also been applied. In particular, there is an N-type connector connection as a coaxial cable connector for connecting coaxial cables together without deteriorating high-frequency characteristics (see, for example, Patent Document 1).

  The N-type connector has a plug connector 2a (see FIG. 7) having a center pin 3 and a jack connector 6 (see FIG. 8) having a center socket 7, but after connecting the center pin 3 to the center socket 7, The coupling screw 5a is rotatably attached to the connector main body 20a. The inner screw 51 on the inner peripheral surface of the coupling nut 5a is fastened to the outer screw 63 on the outer peripheral surface of the jack connector main body 60 so that the connection is firmly maintained.

  As shown in FIG. 7, the plug connector 2 a is attached to the end of the coaxial cable 1, and the cylindrical plug connector main body 20 a connected to the outer conductor (not shown) of the coaxial cable 1, the coaxial cable 1. The center pin 3 connected to the inner conductor (not shown) of the connector and the insulator 4 for electrically insulating the plug connector body 20a and the center pin 3 are concentrically arranged, and the outer periphery of the plug connector body 20a A coupling nut 5a is rotatably attached to the part. Reference numeral 24 denotes a packing.

  On the other hand, as shown in FIG. 8, the jack connector 6 includes a jack connector body 60 having an outer thread 63 formed on the outer peripheral surface, a center socket 7 having a center pin receiving hole 70 formed at the tip, and the jack connector body 60 and the center. An insulator (not shown) that electrically insulates the socket 7 is concentrically arranged.

JP 2007-213864 A

  However, coaxial cables are generally harder to bend than ordinary wires because of their structure, and when connecting connectors in a narrow space inside the structure, such as an antenna, the shafts of the cables to be connected are butted together. In some cases, even if a connector is connected, the frequency characteristics may not be sufficiently satisfied.

  In particular, in N-type connector connection work, it is important to reliably butt the main bodies before tightening the coupling nut in order to maintain good frequency characteristics. However, since the end of the main body is hidden by the coupling nut of the N-type connector, it cannot be visually confirmed whether or not the abutting can be performed. In general, coupling nuts are tightened with a torque wrench, so if they are tightened without being butt-fitted reliably, the screws will not fit properly and the connector may be broken. Needs experience.

  The present invention has been made in view of the above points, and the object of the present invention is to provide a coaxial connection in which a coaxial cable can be connected to a connector without impairing high-frequency characteristics in a narrow space where structural products are limited. It is to provide a cable connector.

  In order to solve the above problems, a coaxial cable connector of the present invention includes a plug connector and a jack connector that are connected to each other, and the plug connector is attached to a terminal end of the coaxial cable, and an outer periphery of the plug body. A coaxial cable connector having a coupling nut that is rotatably provided to tighten and connect the plug connector and the jack connector, and a central contact that is disposed at the center of the plug body and is electrically connected to the inner conductor of the coaxial cable. The coupling nut is provided on the plug body so as to be movable along the axial direction so that the periphery of the plug connector and the jack connector is exposed when the plug connector is abutted with the jack connector. It is characterized by that.

  Further, when the plug connector and the jack connector are connected, a coil spring for pressing the plug main body against the jack connector is formed between a pressing portion of the coupling nut and a flange portion formed at the tip of the plug main body. It may be provided between them.

  A stopper for restricting the amount of movement of the coupling nut may be provided at the rear end of the plug body.

  According to the coaxial cable connector of the present invention, it is possible to connect the coaxial cables to each other without impairing the high-frequency characteristics in a narrow space where structural products are limited.

FIG. 1 is a view when a coupling nut of a plug connector according to an embodiment of the present invention is moved rearward. FIG. 2 is an external view when the plug connector of FIG. 1 is abutted with the jack connector. FIG. 3 is a half cross-sectional view showing a state in which the coupling nut is moved forward from the state of FIG. 2, tightened to the external screw of the jack connector, and the plug connector and the jack connector are connected. FIG. 4 is a half sectional view showing a plug connector according to another embodiment of the present invention. FIG. 5 is a half sectional view showing a state when the plug connector of FIG. 4 is abutted with the jack connector. FIG. 6 is a half cross-sectional view showing a state in which the coupling nut is fastened to the external screw of the jack connector from the state of FIG. 5 and the plug connector and the jack connector are connected. FIG. 7 is a half sectional view showing a conventional plug connector of an N-type connector. FIG. 8 is a half sectional view showing a jack connector of a conventional N-type connector.

  A preferred embodiment of the present invention will be described with reference to the accompanying drawings. In addition, the thing which has the same function as the past is attached | subjected and demonstrated with the same code | symbol.

  As shown in FIGS. 1 to 3, the coaxial cable connector includes a plug (plug connector) 2 that is a male connector member, a receiving-side plug (jack connector) 6 that is a female connector member, a coupling nut 5, and the like. Consists of Although not shown, the coaxial cable 1 is configured such that an insulator and an outer conductor are concentrically disposed on an inner conductor having a circular cross section from the inner side, and the outer side is covered with a sheath.

  As shown in FIG. 1, the plug connector 2 is attached to the end of the coaxial cable 1 and is electrically connected to an external conductor (not shown) of the coaxial cable 1 (hereinafter referred to as a plug body 20). A center contact (center pin) 3 that is electrically connected to an inner conductor (not shown) of the coaxial cable 1, and an insulator 4 that electrically insulates the plug body 20 and the center contact 3. These are arranged concentrically. The plug body 20 is made of a conductive metal, and is formed with a cylindrical tubular portion 21, a flange portion 22, and a thicker cylindrical barrel portion 23 than the tubular portion 21 from the tip (tip in the connection direction) side. Has been. A packing 24 is attached to the cylindrical portion 21 side of the flange portion 22.

  The coupling nut 5 is loosely fitted on the outer peripheral surface of the plug body 20 so as to be freely rotatable. As shown in FIG. 3, the coupling nut 5 has a pressing portion 52 formed in an annular shape inside the rear end (rear end in the connection direction) of the inner peripheral surface 50 and an inner screw 51. The inner screw 51 is screwed to an outer screw 63 of the jack connector 6 described later.

  On the other hand, as shown in FIGS. 2 and 3, the jack connector 6 has a jack connector main body 60 (hereinafter referred to as the jack main body 60) having an external screw 63 formed on the outer peripheral surface, and a center contact receiving hole 70 formed at the tip. The center socket 7 and an insulator (not shown) that electrically insulates the jack body 60 and the center socket 7 are provided, and these are arranged concentrically. The jack body 60 is made of a conductive metal, and is formed with a cylindrical tubular portion 61 from the front end side and a thick cylindrical body from the tubular portion 61. The outer screw 63 is formed on the outer peripheral surface of the cylindrical portion 61, and a stepped portion 62 is provided in the hollow portion of the cylindrical portion 61. Although not shown, the jack connector 6 is also connected to the coaxial cable, the jack body 60 is connected to the outer conductor of the coaxial cable, and the center socket 7 is connected to the inner conductor of the coaxial cable.

  The outer diameter of the tubular portion 21 of the plug body 20 and the inner diameter of the tubular portion 61 of the jack body 60 are equal to each other, and when the plug connector 2 and the jack connector 6 are connected, the tip of the tubular portion 21 is the tubular portion. 61 abuts on the stepped portion 62. Further, the outer diameter of the center contact 3 and the inner diameter of the center socket 7 are equal to each other, and the center contact 3 and the center socket 7 are electrically connected in the connected state of the plug connector 2 and the jack connector 6.

  The major feature of the present invention is that when the plug connector 2 and the jack connector 6 are brought into contact with each other, the distal end portion (tubular portion 21, packing 24, flange portion 22) of the plug connector 2 and the distal end portion of the jack connector 6 (tubular shape). The coupling nut 5 is provided on the plug body 20 so as to be movable along the axial direction so that the periphery of the portion 61) is exposed.

  That is, since the coupling nut 5 is loosely fitted to the outer peripheral surface of the plug body 20 as described above, the inner diameter of the coupling nut 5 is formed larger than the outer diameter of the plug body 20. The coupling nut 5 can be moved on the plug body 20 along the axial direction thereof. Therefore, as shown in FIG. 1, when the coupling nut 5 moves rearward from the plug body 20 (FIG. 1 shows the coupling nut 5 positioned on the coaxial cable 1), the tip of the plug connector 2 The part is exposed.

  Next, the case where the plug connector 2 configured in this way is connected to the jack connector 6 will be described.

  First, when the plug connector 2 and the jack connector 6 are abutted, the coupling nut 5 is moved backward from the plug connector 2 as shown in FIG. Next, the plug body 20 is held as shown in FIG. That is, the tubular portion 21 of the plug connector 2 is inserted into the tubular portion 61 of the jack connector 6, and the center contact 3 is fitted into the center contact receiving hole 70 to be connected to the center socket 7. As shown in FIG. 2, after confirming that the front end portion of the jack connector 6 (the front end portion of the cylindrical portion 61) is securely in contact with the packing 24 of the plug connector 2 and inserted, the coupling nut 5 is moved forward. Moving.

  Thereafter, as shown in FIG. 3, the coupling nut 5 is rotated in a predetermined direction, and the plug connector 2 is connected to the jack connector 6 by tightening the inner screw 51 of the coupling nut 5 to the outer screw 63 of the jack connector 6. The end face of the pressing portion 52 of the coupling nut 5 abuts against and presses the end face of the flange portion 22 of the plug body 20 while the coupling nut 5 moves in the axial direction on the jack body 60 by screwing. The tip end face of the connector 2 (tip end face of the tubular portion 21) and the stepped portion 62 of the tubular portion 61 of the jack connector 6 face each other and abut against each other. A packing 24 provided on the flange portion 22 of the plug connector 2 stabilizes the connection between the plug connector 2 and the jack connector 6 and waterproofs the plug connector 2 and the jack connector 6. In this way, the connection between the plug connector 2 and the jack connector 6 is completed.

  As described above, the coaxial cable connector of the present invention has a structure in which the coupling nut 5 loosely fitted in the plug connector 2 can be moved to the rear of the plug connector 2 so that the tip of the plug connector 2 is exposed. When the plug connector 2 and the jack connector 6 are butted and connected, it is possible to visually confirm whether or not the tip ends of the plug connector 2 and the jack connector 6 have been reliably abutted, and the number of structural products is limited. In the space, connectors of coaxial cables can be connected without impairing the high frequency characteristics.

  As a mode of connecting the coaxial cable 1 by the coaxial cable connector, the plug connector 2 is attached to the free end of the coaxial cable 1 and the jack connector 6 is fixed to the chassis, and the plug connector 2 and the jack connector 6 are separately provided. The plug connector 2 and the jack connector 6 are connected to the end of the coaxial cable 1 in each chassis, and the present invention can be applied to either case.

  Next, another embodiment will be described with reference to FIGS.

  In the present embodiment, the coil spring 8 is provided between the pressing portion 52 of the coupling nut 5 and the flange portion 22 of the plug body 20. In the plug connector 2, a rear end flange portion 25 that is a stopper for restricting the amount of movement of the coupling nut 5 and preventing the coil spring 8 from coming off is formed at the rear end of the plug body 20. As shown in FIG. 4, when the coupling nut 5 is moved backward until the pressing portion 52 contacts the rear end flange portion 25 of the plug body 20, the tip end portion of the plug connector 2 can be visually observed. ing. Since other members are the same, description thereof is omitted.

  In the present embodiment, when the plug connector 2 is connected to the jack connector 6, the coupling nut 5 is kept until the pressing portion 52 of the coupling nut 5 comes into contact with the rear end flange portion 25 of the plug body 20 as shown in FIG. 4. Is retracted on the plug body 20.

  Next, as shown in FIG. 5, the plug body 20 is held, the tubular portion 21 of the plug connector 2 is inserted into the tubular portion 61 of the jack connector 6, and the center contact 3 is connected to the center socket 7. After confirming that the tip end portion of the jack connector 6 is securely in contact with the packing 24 of the plug connector 2 and inserted, the coupling nut 5 is moved forward as shown in FIG. The plug connector 2 is connected to the jack connector 6 by tightening the inner screw 51 to the outer screw 63 of the jack connector 6. In the present embodiment, after visually confirming the insertion, the coupling nut 5 is moved and the screw is tightened. At this time, the plug body 20 is pressed against the jack connector 6 by the spring force of the coil spring 8, and a good connection is obtained. realizable.

  It should be noted that one end of the coil spring 8 is brought into contact with the flange portion 22 of the plug main body 20, and the other end is brought into contact with the pressing portion 52 of the coupling nut 5, whereby the distal end portion of the plug main body 20 is moved by the spring force of the coil spring 8. Exposed, it is possible to save the trouble of retracting the coupling nut 5 from the plug connector 2 when connecting the plug connector 2 and the jack connector 6.

DESCRIPTION OF SYMBOLS 1 Coaxial cable 2 Plug connector 3 Center contact 4 Insulator 5 Coupling nut 6 Jack connector 7 Center socket 8 Coil spring 20 Plug body 22 Flange part 25 Rear end flange part (stopper)
52 Pressing part 63 External screw

Claims (3)

A plug connector and a jack connector connected to each other, wherein the plug connector is attached to the end of the coaxial cable, and is rotatably provided on an outer periphery of the plug body to tighten the plug connector and the jack connector. In a coaxial cable connector having a coupling nut to be connected, and a central contact disposed at the center of the plug body and electrically connected to the inner conductor of the coaxial cable,
The coupling nut is provided on the plug body so as to be movable along the axial direction so that the periphery of the plug connector and the jack connector is exposed when the plug connector is abutted with the jack connector. Coaxial cable connector characterized by   When the plug connector and the jack connector are connected, a coil spring for pressing the plug body against the jack connector is provided between a pressing portion of the coupling nut and a flange portion formed at the tip of the plug body. The coaxial cable connector according to claim 1, wherein the coaxial cable connector is provided.   The coaxial cable connector according to claim 1 or 2, wherein a stopper for restricting a moving amount of the coupling nut is provided at a rear end of the plug body.

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