JP3540876B2 - Connector for coaxial cable and method of connecting connector to coaxial cable - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a connector used for connection of a coaxial cable for communication, and more particularly to a connector for a coaxial cable which is optimally used for a coaxial cable having a structure in which an outer conductor has a cylindrical shape and an inner conductor has a rod shape.
[0002]
[Prior art]
FIG. 7 is a sectional view showing a conventional coaxial cable connector.
As shown in FIG. 8, the coaxial cable 201 includes an inner conductor 202 serving as a core wire, an insulator 203 formed coaxially outside the inner conductor 202, and a corrugated outer conductor 204 provided outside the insulator 203. And a sheath 205 covering the outer conductor 204.
[0003]
As shown in FIG. 7, the connector 206 connected to the coaxial cable 201 has an inner conductor 207 into which the tip of the inner conductor 202 is inserted, and a connector 206 provided outside the inner conductor 207 to contact the tip of the outer conductor 204. A washer 209 provided so as to be in contact with the insulating ring 208, a collar 210 provided so as to surround the outer conductor 204 of the coaxial cable 201, an outer casing 211 provided to cover these members, It comprises a fastening ring 212 screwed into the outer casing 211 and a rubber ring 213 arranged between the fastening ring 212 and the collar 210.
[0004]
When attaching the connector 206 to the coaxial cable 201, first, the coaxial cable 201 is processed as shown in FIG. In this case, the exposed length of the internal conductor 202 is accurately cut out. Further, the fastening ring 212 is left attached. Next, the fastening ring 212 and the rubber ring 213 are externally fitted to the sheath 205 of the coaxial cable 201, and the collar 210 and the washer 209 are externally fitted to the external conductor 204. In this state, the tip of the inner conductor 202 of the coaxial cable 201 is inserted into the recess of the inner conductor 207 of the connector 206, and the inner conductor 207 and the inner conductor 202 of the coaxial cable 201 are electrically connected. Then, when the entire coaxial cable 201 can no longer be pushed in, the rubber ring 213 is pushed into the outer casing 211 and the fastening ring 212 is further screwed in to complete the mounting.
[0005]
[Problems to be solved by the invention]
However, the above-described prior art has the following problems.
(1) When attaching a connector to a coaxial cable, the cable must be dimensioned in advance, so that the outer conductor and the inner conductor of the cable cannot be connected to the connector with one touch.
(2) When connecting the outer conductor of the coaxial cable to the outer conductor of the connector, it is necessary to peel off the sheath of the coaxial cable.
(3) When connecting the inner conductor of the coaxial cable and the inner conductor of the connector, process the inner conductor of the coaxial cable to a dimension longer than the insulating layer, and solder or screw it in during installation or insert it so as to cover the inner conductor. It is necessary to make it a structure to make it.
[0006]
Therefore, an object of the present invention is to provide a connector for a coaxial cable in which the connector can be attached to the coaxial cable with one touch.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a main body having a hollow portion, a cylindrical female screw rotatably fixed to an outer periphery of an open end of the hollow portion of the main body, and an end surface formed into a flat surface. A cylindrical fastener that can insert the cut coaxial cable, hold the coaxial cable by fixing means after the insertion, and move toward the main body as the coupling with the female screw increases; and the coaxial cable. A connector-side inner conductor, which is movably fitted with a pressing member whose tip end surface is arranged to be able to press against the solid inner conductor, and which is installed at an axial center in the hollow portion of the main body; And a collar having at least one projection that is coaxially disposed in the hollow portion while being insulated from the pressing member and that cuts into a cut end surface of the corrugated outer conductor of the coaxial cable.
Further, in order to achieve the above object, the present invention, the inner conductor of the coaxial cable, the insulator, the outer conductor, and cutting the sheath to form a plane orthogonal to the central axis of the coaxial cable,
The coaxial cable having the flat surface formed therein is inserted into a hollow portion of the fastener which is screw-engaged with a nut externally fitted to a main body having an inner conductor mechanism on a center axis, and the fastener is connected to the outer periphery of the coaxial cable. Fixing to the surface,
By rotating the nut in the tightening direction, the main body is moved in the axial direction so as to approach the plane of the coaxial cable, and the movement causes the cutting edge collar to be arranged in the body and insulated from the internal conductor mechanism. Moving the cutting edge in the axial direction so that the cutting edge bites into the outer conductor in the plane, and presses the pressing member of the inner conductor mechanism against the inner conductor in the plane of the coaxial cable. A method for connecting a connector to a coaxial cable is provided.
[0008]
According to this configuration, the fastening fitting is externally fitted to the coaxial cable, and after fastening this to the coaxial cable, it is inserted into the main body side, and the female screw provided on the main body side and the fastening fitting are screwed together. As the screwing increases, the fastener and the coaxial cable enter the body of the connector. In the process, the protrusion of the collar bites into the outer conductor of the coaxial cable, and the tip end surface of the pressing member presses against the inner conductor of the coaxial cable. As a result, the connector can be mounted with one touch, and a reliable connection can be achieved.
[0009]
The pressing member is urged in the direction of the coaxial cable by an urging member provided in the connector-side internal conductor.
According to this configuration, the urging member provided in the connector-side inner conductor applies an urging force to the pressing member so as to push the pressing member in the coaxial cable direction. As a result, the distal end surface of the pressing member always presses against the inner conductor of the coaxial cable, and reliable electrical contact is obtained. Also, no matter who wears it, there is no variation in the contact state.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a sectional view showing an embodiment of a coaxial cable connector according to the present invention.
As shown in FIG. 1, a connector 100 according to the present invention includes a cylindrical fastener 101 having an inner diameter substantially equal to the outer diameter of a coaxial cable 201 and a groove 102 provided at a central portion of the fastener 101. An O-ring 103 to be fitted, clamps 104 and 105 attached to the outer peripheral surface of the fastener 101, a ring-shaped nut 106 screwed to one end of the fastener 101, and the nut 106 mounted on an outer peripheral portion of one end. A main body 107, a cutting edge collar 108 having a configuration shown in FIG. 2 disposed at a position facing the nut 106 at an end of the main body 107, and a ring-shaped insulator adjacent to and coaxial with the cutting edge collar 108. 109, a small-diameter insulator 110 disposed coaxially with the insulator 109 inside the other end of the main body 107, and an internal conductor mechanism shown in FIG. Here, the insulator 109 and the insulator 110 serve to support an internal conductor mechanism described later.
[0011]
As shown in FIG. 2, the cutting blade collar 108 has a plurality of cutting blades (triangular protrusions) 108a provided on the coaxial cable side. FIG. 2A is a side view, and FIG. FIG.
As shown in FIG. 3, the inner conductor mechanism has a pin-shaped cross-sectional shape and a push pin 111 (press member) disposed at an axial center portion, and a hollow portion 112 into which one end of the push pin 111 is inserted. Is formed at one end and an inner conductor 113 having a hollow groove 113a having a slit 113b formed at the other end, and an urging force for pushing the push pin 111 by being housed inside a push pin 111 inserted into the hollow groove 113a. And a connection spring 115 that is fitted into the body of the clamp 101 and ensures electrical connection with the inner surface of the internal conductor 113. As shown in FIG. 4, the connection spring 115 has a configuration in which a central portion bulges and slits 115a are provided at regular intervals in a circumferential direction. The connection spring 115 is fitted around the push pin 111, and one end thereof is fixed to an end of the push pin 111.
[0012]
In the above configuration, when the coaxial cable 201 and the connector 100 are connected, the end of the coaxial cable 201 is processed as shown in FIG. That is, the end of the cable is cut flat with a saw or a cutter, and the process of peeling the sheath 205 to expose the outer conductor 204 or cutting the inner conductor 202 to a predetermined length as in the related art becomes unnecessary. .
[0013]
The clamp 101 is fitted into the coaxial cable 201 thus processed to an appropriate position, and the clamps 104 and 105 are tightened and fixed. In this state, the coaxial cable 201 is aligned with the nut 106, and the nut 106 is rotated in the tightening direction. With this rotation, in the process of the fastener 101 entering the main body 107, the cutting edge 108a of the cutting edge collar 108 bites into the outer conductor 204 as shown in FIG. An electrical connection is made. At this time, even if the sheath 205 is sandwiched between the outer conductor 204 and the cutting blade collar 108, the cutting blade 108a cuts the sheath 205 in the process of tightening the fastener 101, and the outer conductor 204 and the cutting blade collar 108 are cut. 108 electrical contacts are enabled. Further, the inner conductor 202 is pressed against the end face of the push pin 111 urged by the coil spring 114, and the two are electrically connected. At this time, the connection spring 115 functions to ensure the connection between the push pin 111 and the internal conductor 113 and prevent the occurrence of poor contact.
[0014]
As described above, according to the present invention, the end of the coaxial cable 201 is cut into a flat state, the fastening fitting 101 is fitted into the cut end, inserted into the connector main body 107, and the fastening fitting 101 and the connector main body 107 are joined. The mounting of the connector is completed only by rotating the nut 106 for mounting. As a result, the connector can be mounted with a single touch, and when used for emergency recovery measures in the event of a cable accident in broadcasting equipment, communication equipment, etc., the connector can be mounted quickly, and even if the operator changes, the characteristics differ among individuals. Does not occur and can be securely attached.
[0015]
As is apparent from the above description, according to the present invention, a clamp is externally fitted to a coaxial cable, which is fastened to the coaxial cable and then inserted into the main body, and the female screw provided on the main body is connected to the female screw. The fastener and the coaxial cable are allowed to enter into the main body of the connector as the screwing is strengthened, and the corrugated outer conductor of the coaxial cable has a collar protrusion during the entry process. Since the distal end surface of the pressing member is pressed into contact with the solid inner conductor of the coaxial cable, the connector can be mounted with one touch and reliable connection can be made.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of a coaxial cable connector according to the present invention.
FIGS. 2A and 2B show a cutting blade collar according to the present invention, wherein FIG. 2A is a side view, and FIG.
FIG. 3 is a sectional view showing a configuration of an internal conductor mechanism according to the present invention.
FIG. 4 is a perspective view showing a configuration of a push pin and a connection spring shown in FIG. 3;
FIG. 5 is a cross-sectional view showing a coaxial cable terminal process according to the present invention.
FIG. 6 is a perspective view showing a state in which the cutting edge of the cutting edge collar cuts into the outer conductor of the coaxial cable.
FIG. 7 is a cross-sectional view showing a conventional coaxial cable connector.
FIG. 8 is a cross-sectional view showing a state of a coaxial cable connected to a conventional coaxial cable connector after terminal processing.
[Explanation of symbols]
101 Clamping bracket 104, 105 Clamp 106 Nut 107 Main body 108 Cutting blade collar 108a Cutting blade 111 Push pin 113 Inner conductor 114 Coil spring 115 Connection spring 201 Coaxial cable 202 Inner conductor 204 Outer conductor 205 Sheath

Claims (3)

A main body having a hollow portion, a cylindrical female screw rotatably fixed to the outer periphery of the open end of the hollow portion of the main body, and a coaxial cable whose end face is cut into a plane can be inserted, and the insertion can be performed. Later, the coaxial cable is fixed by the fixing means, and a cylindrical fastener which moves toward the main body side as the connection with the female screw is strengthened, and a front end face of the cylindrical fastener can be pressed against the solid inner conductor of the coaxial cable. And a connector-side inner conductor movably fitted with a pressing member disposed in the hollow portion of the main body and installed at an axial portion in the hollow portion of the main body, and coaxially insulated from the pressing member in the hollow portion of the main body. And a collar having at least one protrusion that cuts into a cut end surface of the corrugated outer conductor of the coaxial cable. The coaxial cable connector according to claim 1, wherein the pressing member is urged in the direction of the coaxial cable by an urging member disposed in the connector-side internal conductor. Cutting the inner conductor, insulator, outer conductor, and sheath of the coaxial cable to form a plane orthogonal to the central axis of the coaxial cable;
The coaxial cable having the flat surface formed therein is inserted into a hollow portion of the fastener which is screw-engaged with a nut externally fitted to a main body having an internal conductor mechanism on a central axis, and the fastener is attached to the outer periphery of the coaxial cable. Fixing to the surface,
By rotating the nut in the tightening direction, the main body is moved in the axial direction so as to approach the plane of the coaxial cable, and the movement causes the cutting blade collar to be arranged inside the main body insulated from the internal conductor mechanism. Moving the cutting edge in the axial direction so that the cutting edge bites into the outer conductor in the plane, and presses the pressing member of the inner conductor mechanism against the inner conductor in the plane of the coaxial cable. A method for connecting a connector to a coaxial cable, comprising:

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