JP2010050034A - Covering clamp ring for coaxial cable connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a covering clamp ring for a coaxial cable connector, capable of coping with shrinkage of a covering of a coaxial cable caused by a secular change due to a temperature change, an influence of an ultraviolet ray or the like. <P>SOLUTION: This covering clamp ring 11 is provided with a male screw part 1b in a rear end side of a connector body 1 with a tip side attached to equipment, and clamps the covering Cc of the coaxial cable C, by contracting a diameter with a screwing operation of a tightening metal fitting 2 screwed with the male screw part 1b, and is juxtaposed with a plurality of projections 11b a circumferential direction of the covering Cc, in an axial-directional intermediate part of an inner circumference thereof. The covering clamp ring 11 is constituted of a split cylindrical body made of a synthetic resin. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a jacket clamp ring for a coaxial cable connector.

  A male screw part is provided on the rear end side of the connector main body for attaching the front end side to the device, and is a clamp that is forwardly engaged with the male screw part, and presses the pressure ring between the pressure ring and the pressure receiving ring. A coaxial cable connector is known in which the diameter of the interposed clamp ring for the jacket is reduced so as to sandwich the jacket of the coaxial cable in the clamp (for example, Patent Document 1).

JP 2003-151698 A

  In the above conventional example, when the pressing ring pressed by the clamp fitting presses the clamp ring in the pressure receiving ring direction, the outer ring clamping ring has a taper wall overlapped with the pressure receiving ring on the front end side and the pressure ring on the rear end side. The diameter of the cable is reduced and pressed against the outer cover of the coaxial cable to sandwich the coaxial cable. However, the outer cover of the coaxial cable is easily shrunk due to temperature changes, the influence of ultraviolet rays, etc. There are cases where various troubles occur, such as shrinkage of the jacket and loss of water tightness between the connector and the coaxial cable.

  It is an object of the present invention to provide a clamp ring for a coaxial cable connector that can cope with shrinkage (reduction in the direction along the axis) of the outer sheath of the coaxial cable as compared with the conventional example. It was created.

  A coaxial cable in which a fastening bracket is screwed into a male thread portion provided on the rear end side of the connector main body, which is attached to the end of the connector, and the outer diameter of the coaxial cable is clamped by the screwing operation of the fastening bracket. In the outer ring clamp ring of the connector for a connector, a plurality of protrusions are arranged in parallel in the circumferential direction of the outer jacket at an intermediate portion in the axial direction of the inner peripheral surface.

  According to the present invention, the reduced diameter load applied to the jacket clamp ring loaded by the operation of the clamp is concentrated on the protrusion and pressed against the jacket of the coaxial cable. It is possible to provide a jacket clamp ring for a coaxial cable connector capable of coping with contraction and securely holding a coaxial cable including a jacket portion.

  The drawings show an embodiment of the outer ring clamp ring of the coaxial cable connector according to the present invention, FIG. 1 is a sectional view showing the use state of the coaxial cable connector, and FIG. 2 is a perspective view of the outer ring clamp ring. is there.

  In the figure, reference numeral 1 denotes a connector main body made of metal (in the embodiment, brass) to which a first male screw 1a provided on the front end side is screwed and attached to the device A. A central contact 3 is arranged on the axis of the connector main body 1. The pin 3a of the center contact 3 is protruded from the main body 1 through an insulator 4 made of a synthetic resin and is inserted into the device.

  The center contact 3 is supported by the support plate 6 by fitting its base portion into a support hole 6a provided in the support plate 6 sandwiched between the presser tube 5 and the connector body 1 at the outer peripheral end, and the base end surface is opened. The male screw formed on the core wire (center conductor) Ca of the coaxial cable C is screwed into the screw hole 7 provided in this manner and connected to the coaxial cable C.

  The support plate 6 is configured by providing a gap 6b at a suitable position of a disk-shaped insulator (in the embodiment, synthetic resin) provided with the support hole 6a in the center. By supporting the base of the contact 3 or the tip of the core Ca, the connector A can have a relatively small diameter. That is, in order to obtain an arrangement (assembly) state of the center contact having good electrical characteristics, the dielectric of the insulating support material (support plate 6 in the embodiment) used for supporting the base portion of the center conductor is used. It is desirable to make the rate as close as possible to that of air and to make it as small as possible. In the case of the embodiment, since the support plate 6 having the gap 6b (the larger the total area is, the smaller the dielectric constant is) is used. As a result, the diameter of the connector main body 1 that accommodates the center contact 3 can be reduced.

  A ferrule 8 (made of metal) is disposed inside the presser cylinder 5 that sandwiches the peripheral end portion of the support plate 6, and the ferrule 8 is interposed between the pressure receiving cylinder portion 8a and the pressure receiving cylinder portion 8a. Each of the cylindrical portions 8b is composed of a double cylindrical body connected to each other at a circular ring-shaped base piece, and the sandwiched tubular portion 8b is assembled to the coaxial cable C so as to be sandwiched inside the outer conductor Cb of the coaxial cable C. It is attached (connected).

  A tapered surface 8a ′ having a diameter gradually increased from the front end side to the rear end direction is provided on the inner peripheral surface of the pressure receiving cylinder portion 8a of the ferrule 8 in the direction opposite to the tapered surface 8a ′. That is, a tapered surface 9a 'having a diameter gradually increased from the rear end side toward the front end is provided on the inner peripheral surface of the front-rear intermediate portion of the pressing cylinder 9 (made of metal), and corresponds to the tapered surfaces 8a' and 9a '. A metal clamp ring 10 having a diameter reduced by contact with the tapered surfaces 10a and 10b is disposed between the pressure receiving tube portion 8a of the ferrule 8 and the thick portion 9a on the rear side of the pressing tube 9, and the thick wall The pressing cylinder 9 composed of the portion 9a and the thin portion 9b on the front portion side is interposed between the pressure tube 5 and the pressure receiving portion 8a to the clamp ring 10 of the ferrule 8 in the thin portion 9b, so that the thick portion 9a A part protrudes rearward from the connector body 1 and protrudes into the clamp 2 I'm allowed.

  The presser cylinder 5 made of a cylindrical body is provided with an inner collar part 5a having a smaller inner diameter on the tip side, and the inner ring part 5a functions as a spacer so that the presser ring 5 and the pressure-receiving parts 8a to 8a. A sandwiching gap is formed between the clamp ring 10 and a pressing cylinder 9 (thin wall portion 9b) is sandwiched between the sandwiching gap.

  The fastening bracket 2 includes a bracket body 2A that is screwed into a second male screw 1b provided on the rear end side of the connector body 1 and is assembled to the body 1, and a cover frame in which the bracket body 2A is disposed in a middle portion in the front-rear direction. 2B, and a cover clamp ring 11, a press ring 12 and a gasket ring 13 are sequentially arranged on the rear side of the metal fitting body 2A of the cover frame 2B.

  The cover frame 2B is formed by covering a main frame 2B ′ made of a hard synthetic resin such as polycarbonate with a weather-resistant soft synthetic resin layer 2B ″ such as polyvinyl chloride (not shown). However, in manufacturing, the main body 2B ′ is composed of two members and combined), and the outer cover clamp ring 11 accommodated in the main body frame 2B ′ is formed of a split cylinder made of synthetic resin. A plurality of protrusions 11b,... Are arranged side by side in the circumferential direction of the outer sheath Cc of the coaxial cable on the inner peripheral surface of the intermediate portion, and the tapered edge 11a is formed by gradually reducing the diameter of the tip edge in the tip direction. The clamping tube 11 is disposed adjacent to the thick wall portion 9a of the pressing cylinder 9 having a taper surface 9a ″ in the opposite direction to the outer side of the clamp ring 11 at the engagement step portion 12a. 2 (the cover frame 2B) is provided with the presser ring 12 to be pressed. Behind the grayed 12 in contact with the envelope Cc of the coaxial cable C, it is arranged the gasket ring 13 to expect a water airtight function.

  Then, the connector body 1 in which the insulator 4 is integrated is assembled to the device by using the first male screw 1a, and the fastening metal fitting 2 in which the gasket ring 13, the holding ring 12 and the outer cover clamp ring 11 are accommodated. Then, it is combined around the outer sheath Cc portion adjacent to the terminal portion of the coaxial cable C that has been subjected to secondary processing as appropriate, and the spring washer 14 is housed inside the metal fitting body 2 of the fastening metal fitting 2 so as to be outside the outer conductor Cb portion of the terminal portion. Is combined with a pressing cylinder 9 and a clamp ring 10 disposed on the inner side of the pressing cylinder 9, while the ferrule 8 is connected to the external cylinder C by sandwiching the outer conductor Cb between the pressure receiving cylinder part 8 a and the insertion cylinder part 8 b. The end of the core wire (center conductor) Ca of the coaxial cable C is attached to the end portion of the conductor Cb so that the presser tube 5 (the inner flange piece 5a) is interposed between the ferrule 8 and the support plate 6. Next processed and formed The threaded portion is screwed into the screw hole 7 of the center contact 3 integrated with the support plate 6 and assembled, and the pin 3a of the center contact 3 is accommodated in the connector body 1 assembled to the device A. When the clamp 1 is inserted into the device through the through-hole 15 of the insulator 4 and the first clamp 2 is screwed to the second male screw 1b of the main body 1, the clamp ring 10 has the pressing cylinder 9 and the pressure receiving cylinder 8a (ferrule 8). ), The taper surfaces 10a and 10b are pressed relative to each other to be reduced in diameter so that the outer conductor Cb is sandwiched between the inserted cylindrical portion 8b of the ferrule 8, and the coaxial cable C The outer cover Cc is pressed by the pressing cylinder 9 and the presser ring 12 relative to each other by the advancement of the clamp 2 in the direction of the main body 1, and the outer cover Cc is reduced in diameter by contact between the tapered surfaces 9a ″ and 11a. Clamp ring 11 The devices 11b,... (Equally arranged in the circumferential direction of the jacket Cd with an equal interval between them, preferably four in the embodiment) are bitten and sandwiched between the device A and the coaxial cable via the connector. C connection status can be obtained.

Sectional drawing which shows the use condition of the connector for coaxial cables. The perspective view of the clamp ring for jackets.

Explanation of symbols

1 Connector Main Body 1b Male Thread Part 2 Fastening Bracket 11 Cover Clamp Ring 11b Projector C Coaxial Cable Cc Jacket

Claims (1)

  A coaxial cable in which a fastening bracket is screwed into a male thread portion provided on the rear end side of the connector main body, which is attached to the end of the connector, and the outer diameter of the coaxial cable is clamped by the screwing operation of the fastening bracket. A clamp ring for a jacket of a connector for a jacket, wherein a plurality of protrusions are juxtaposed in a circumferential direction of the jacket at an intermediate portion in an axial direction of an inner circumferential surface.

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