JPH0548264U - Coaxial cable connector - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a coaxial cable connector in which the connector and the coaxial cable are securely fastened and which is not likely to come off even if a pulling force or shaking is carelessly applied. [Structure] A fastening metal fitting 17 is provided on the proximal end side of a connector body 11 having a center contact 20 into which an inner conductor 1 of a coaxial cable A is inserted, and the center contact is caulked inside the connector body to connect to the inner conductor. Is provided with a tightening ring 24, and a first taper is formed inside the tightening fitting.
The sleeve 33 has a first pressing ring 31 having a pressing portion 31a and a second pressing portion 32a having a taper, and is inserted inside the outer conductor 3 of the coaxial cable.
The second pressing ring 32 having the above is provided. Furthermore, the first
The outer conductor 3 fitted in the sleeve 33 is pressed by the first pressing portion 31a and the second pressing portion 32a in the radial contraction direction by the tightening of the tightening metal fitting 17 against the connector body 11 between the second holding ring and the second holding ring. A clamp ring 34 that clamps from the outside is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coaxial cable connector for connecting a coaxial cable such as a CATV cable.

[0002]

[Prior Art]

 Coaxial cable connectors for connecting coaxial cables such as CATV cables include FT type connectors for trunk lines and F type connectors for branch lines.

Here, the coaxial cable for the main line and the FT type connector will be described. In the coaxial cable A, as shown in FIG. 4, the inner conductor 1 is covered with an insulating cylindrical body 2, and the insulating cylindrical body 2 is covered with the insulating cylindrical body 2. An outer skin 4 made of an insulating member is covered around the body 2 via an outer conductor 3.

Therefore, in order to connect the coaxial cable A to the FT type connector, first, the insulating cylinder 2, the outer conductor 3, and the outer cover 4 are cut to the same length from the end of the coaxial cable A, and the inner conductor 1 is cut. Expose. Next, the outer skin 4 is stripped from the end of the outer conductor 3 by a desired length to expose the outer conductor 3.

On the other hand, there are various types of FT type connectors, and a typical example thereof is configured as shown in FIG. That is, 5 is a connector body, on the base end side of which is provided a cylindrical portion 6 having a threaded portion 6a engraved on the outer peripheral surface thereof, and on the inner peripheral surface thereof, a tapered surface whose diameter gradually decreases toward the distal end side. 6b is provided. A first tightening metal 7a is screwed onto the screw portion 6a, and a second tightening metal 7c is screwed onto the first tightening metal 7a via a gasket 7b.

Inside the tapered surface 6b of the connector body 5, there is inserted a clamp ring 8 having a taper surface 8a having a diameter gradually reduced toward the tip side and having a slit (not shown). A pressing ring 9 is provided on the base end surface of the ring 8.

Then, in order to connect the FT connector and the coaxial cable A, firstly, the first and second tightening metal fittings 7a and 7c are fitted to the coaxial cable A which has been subjected to the terminal treatment, and the external portion of the coaxial cable A is fitted. The conductor 3 is inserted into the clamp ring 8 provided inside the connector body 5, and the inner conductor 1 is projected from the connector body 5 to the tip side.

Next, when the first tightening fitting 7a is screwed into the screw portion 6a of the connector body 6 and tightened, the pressing ring 9 advances and the clamp ring 8 is deeply fitted to the connector body 5. .. Therefore, the clamp ring 8 is pressed by the tapered surface 6b in the diameter reducing direction, and the clamp ring 8 is pressed by the outer conductor 3 of the coaxial cable A.

As described above, the coaxial cable A and the FT-type connector are electrically and mechanically connected to each other by tightening the first tightening fitting 7a to the connector body 5.

[0010]

[Problems to be solved by the device]

 In the above-mentioned conventional FT type connector, the press ring 9 and the clamp ring 8 are separate bodies. When the press ring 9 and the clamp ring 8 are assembled into the connector body 5, the clamp ring 8 is first inserted, and then the press ring 9 is inserted. At the time of this assembly, the clamp ring 8 and the presser ring 9 may be inserted upside down.

When the clamp ring 8 is inserted with its front and back reversed, the tapered surfaces are reversed and the clamp ring 8 cannot be pressed in the radial direction even when the first tightening fitting 7a is tightened, resulting in insufficient tightening. If a large tensile force is applied to the coaxial cable A, or if the coaxial cable A is repeatedly shaken by wind and rain, the outer conductor 3 may come off from the clamp ring 8.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a coaxial cable connector that can securely and firmly fasten an outer conductor of a coaxial cable subjected to terminal treatment by fastening a fastening metal fitting. To provide.

[0013]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention relates to a coaxial cable connector for connecting a coaxial cable having an outer conductor concentrically provided so as to surround the inner conductor at the end of the coaxial cable,

A fastening ring for crimping the center contact and connecting with the inner conductor is provided in the inside of the connector body having the center contact into which the inner conductor is inserted, and the base is provided inside the fastening metal fitting connected to the connector body. A first pressing ring having a first pressing portion having a taper whose diameter gradually decreases toward the end side, and a taper which is provided at the tip end side of this first pressing ring and whose diameter gradually decreases toward the tip end side. And a second pressing ring which is connected to the first pressing ring and which has a sleeve inserted inside the outer conductor of the coaxial cable. With the tightening of the tightening fitting to the connector body between the first and second pressing rings, the proximal end side is pressed by the first pressing portion and the distal end side is pressed by the second pressing portion in the diameter reducing direction. There is a clamp ring that clamps the outer conductor fitted to the tube from the outside.

[0015]

[Action]

 The first and second presser rings and the clamp ring are housed in the tightening metal fitting in a state that they are integrally coupled. When the outer conductor provided at the end of the coaxial cable is inserted into the tightening metal fitting, the outer conductor becomes the second conductor. Fit the sleeve of the retainer ring.

Then, when the tightening fitting is tightened to the connector body, the clamp ring is pressed in the diameter reducing direction by the first and second pressing rings, and the clamp ring and the outer conductor are fastened.

[0017]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 are overall views of the FT type connector, and 11 is a connector body. A polygonal portion 12 is provided at a substantially intermediate portion in the axial direction of the connector main body 11, and a screw portion 13 is engraved on the tip side of the polygonal portion 12 and an O-ring 14 is fitted therein.

An O-ring 15 is fitted on the base end side of the polygonal portion 12 of the connector body 11, a screw portion 16 is engraved, and a tightening fitting 17 described later is screwed in. Further, an insulator 19 having a pin hole 18 is provided on the tip side of the connector body 11, and the tip pin 21 of the center contact 20 is inserted into the insulator 19.

The center contact 20 has a large diameter portion 20a at its base end portion, and a step portion 20c is formed at the boundary with the small diameter portion 20b. A conductor receiving portion 21 having a slot is formed on the large diameter portion 20a, and an annular convex portion 22 having a mountain-shaped cross section is provided on the outer peripheral portion thereof.

Further, a first tightening ring 23 and a second tightening ring 24 made of an insulating material are provided inside the connector body 11 on the base end side, and the first tightening ring 23 is attached to the connector body 11. On the other hand, the second tightening ring 24 is locked by the disconnection portion 23a, is immovable in the axial direction, and is movable in the axial direction.

The first tightening ring 23 is fitted in the large-diameter portion 20a and the small-diameter portion 20b of the center contact 20, and a stopper portion 25 that engages with the step portion 20c is provided in a part thereof. Is provided. The second tightening ring 24 is fitted into the large diameter portion 20a of the central contact 20, and a taper surface 26 that abuts on the annular convex portion 22 is formed in a part of the second tightening ring 24.

The tightening member 17 has a through hole 17a, and a screw portion 27 is provided on the outer peripheral surface of the base end side. An auxiliary tightening member 28 having a through hole 28a is screwed into the screw portion 27. A gasket 29 is interposed between the fastening member 17 and the auxiliary fastening member 28. Further, a screw portion 30 to be screwed with the screw portion 16 of the connector body 11 is provided on the inner peripheral surface on the tip end side of the tightening fitting 17.

The inside of the fastening member 17 is formed with a plurality of stepped holes having different diameters, and the first holding ring 31 having an outer diameter corresponding to the small diameter portion and the medium diameter portion is fitted therein. There is. On the inner peripheral surface of the first pressing ring 31, there is formed a first pressing portion 31a formed of a tapered surface having a diameter gradually decreasing toward the base end side.

A second holding ring 32 is provided inside the tip side of the first holding ring 31. The inner peripheral surface of the pressing ring 32 is provided with a second pressing portion 32a formed of a tapered surface having a diameter gradually decreasing toward the tip side, and the inside of the first pressing ring 31 is provided inside the second pressing portion 32a. A sleeve 33 that projects up to is integrally provided.

Further, between the first pressing ring 31 and the second pressing ring 32, a clamp ring 34 which has a slit on a part of the outside of the sleeve 33 and which can be elastically deformed in the diameter reducing direction. Is rotatably supported. The clamp ring 34 is provided at its proximal end with a taper surface 34a joined to the first pressing portion 31a, and at its tip end with a taper surface 34b joined to the second pressing portion 32a. The surface is provided with a saw-toothed concavo-convex portion 34c.

The three parts of the first and second presser rings 31, 32 and the clamp ring 34 are integrally combined, and are assembled in the tightening metal fitting 17 in the combined state, and the O-ring 35 Is held by.

Next, a procedure for connecting the FT connector configured as described above and the coaxial cable A will be described. First, the coaxial cable A is subjected to terminal processing, but the method of terminal processing has been described in the section "Prior Art", and therefore will be omitted.

First, the center conductor 1 and the outer conductor 3 of the coaxial cable A to be connected are inserted in the order of the through hole 28 a of the auxiliary tightening metal fitting 28 and the through hole 17 a of the tightening metal fitting 17, and the central conductor 1 is inserted into the sleeve 33. Is inserted into the conductor receiving portion 21 and the outer conductor 3 is fitted to the outside of the sleeve 33.

In this state, the screw portion 30 of the tightening fitting 17 is screwed onto the screw portion 16 of the connector body 11. The first pressing ring 31 slides on the tapered surface 34a surface of the clamp ring 34 as the tightening metal fitting 17 is tightened to the connector body 11, and the tapered surface 34b surface of the clamp 34 is tapered on the pressing ring 32. By pressing and sliding along the surface 32a, the tip surface of the pressing ring 32 contacts the second tightening ring 24 and presses it forward.

When the second tightening ring 24 moves forward, the tapered surface 26 presses the annular convex portion 22 of the center contact 20, and the center contact 20 is pressed in the radial contraction direction and is inserted into the conductor receiving portion 21. The conductor 1 is caulked and fixed. At this time, the center contact 20 is pressed forward, but since the step portion 20c abuts on the stopper portion 25 of the first tightening ring 23, the forward movement can be prevented.

As the tightening of the tightening metal fitting 17 progresses, the clamp ring 34 moves forward by the first pressing portion 31a formed of the tapered surface of the first pressing ring 31, and at the same time, the proximal end side is pressed in the diameter reducing direction, and the outer conductor The base end of 5 is pressed against the sleeve 33.

Further, the tip end side of the clamp ring 34 is pressed in the diameter reducing direction by the tapered surface 32 a of the second pressing ring 32, and the tip end portion of the outer conductor 3 is pressed against the sleeve 33.

In this way, the base end portion of the clamp ring 34 is reduced in diameter by the first pressing portion 31 a and the tip end portion of the clamp ring 34 is reduced in diameter by the second pressing portion 32 a as the fastening metal member 17 is tightened. .. Therefore, the outer conductor 3 of the coaxial cable A is to be fastened, and since the concavo-convex portion 34c is formed on the inner peripheral surface of the clamp ring 34, the outer conductor 3 is bitten into the outer conductor 3 and is prevented from coming off. It will be more certain.

Further, by tightening the tightening member 17 on the connector body 11, the O-ring 15 is brought into close contact with the inner peripheral surface of the tightening member 17 to maintain watertightness. Further, since the gasket 29 is compressed by the auxiliary tightening fitting 28 and bulges inward and is elastically pressed by the outer sheath 4 of the coaxial cable A, the coaxial cable A is held and watertightness is maintained.

[0036]

[Effect of the device]

 As described above, according to the present invention, when the tightening of the tightening metal fitting progresses, the first pressing part contracts the base end part of the clamp ring and the second pressing part contracts the tip part of the clamp ring by the tightening metal part. Press in the radial direction to press the outer conductor of the coaxial cable against the sleeve.

Therefore, by fastening the outer conductor of the coaxial cable at two points separated by the first pressing portion and the second pressing portion, substantially the entire inner surface of the clamp ring press-contacts the outer conductor contact surface. As a result, the connector and the coaxial cable can be securely fastened, there is no fear of pulling out even if a pulling force or shaking is inadvertently applied, and there is no maintenance work.

Further, since the three parts of the first and second presser ring and the clamp ring are integrally incorporated and coupled with the sleeve in the tightening fixture, and the assembled components are incorporated into the inside of the tightening fixture, There is no risk that the parts will be mistakenly assembled at the time of attachment, and by using a coaxial cable that has been subjected to terminal treatment, the central conductor and the outer conductor can be connected at the same time with one touch, which has the effect of improving workability. Further, since the clamp rings in the first and second presser rings are self-rotating at the time of tightening, there is an advantage that the outer skin and the outer conductor are not twisted.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of an FT connector showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view showing a state in which a coaxial cable is connected to the connector of the embodiment.

FIG. 3 is a vertical cross-sectional side view of first and second presser rings and clamp rings of the same embodiment.

FIG. 4 is a vertical cross-sectional side view of a general coaxial cable subjected to terminal processing.

FIG. 5 is a vertical sectional side view of a conventional FT connector.

[Explanation of symbols]

11 ... Connector main body, 17 ... Tightening metal fitting, 20 ... Center contact, 23 ... First tightening ring, 24 ... Second tightening ring, 31 ... First pressing ring, 31a ... First pressing portion, 32 ... Second Presser ring, 32a ... second pressing portion,
33 ... Sleeve, 34 ... Clamp ring.

Claims (1)

[Scope of utility model registration request] 1. In a coaxial cable connector for connecting a coaxial cable having an outer conductor concentrically provided so as to surround the inner conductor at the end of the coaxial cable, the inner conductor of the coaxial cable is inserted at the tip side. A connector body having a center contact, a fastening metal fitting connected to the proximal end side of the connector body, a fastening ring provided inside the connector body, and crimping the center contact to connect the inner conductor, A first pressing ring provided inside the tightening fitting and having a first pressing portion having a taper whose diameter gradually decreases toward the base end side, and a first pressing ring provided on the distal end side of the first pressing ring and directed toward the distal end side. And a sleeve that is inserted inside the outer conductor of the coaxial cable. A second pressing ring coupled to the pressing ring, and the base end side is rotatably provided on the inner side between the first and second pressing rings and is tightened by the tightening fitting with respect to the connector body. A connector for a coaxial cable, characterized in that a tip end side is pressed by the second pressing part in the diameter reducing direction by the first pressing part, and a clamp ring for clamping the outer conductor fitted to the sleeve from the outside thereof is provided. .