JP2006164917A - Manufacturing method of connector for coaxial cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector which a coaxial cable is easily mounted on, and further, the coaxial cable is hardly pulled out of, and hardly rotated in. <P>SOLUTION: A sleeve body 6 inserted between an internal insulator 7b and an external conductor 7c of the coaxial cable 7, and a pull-out prevention fitting 3 preventing pull-out of the coaxial cable 7 are arranged in a connector body 1 into which the coaxial cable is inserted. The pull-out prevention fitting 3 has a ring-shaped frame body 3b arranged so as to have a central axis identical with that of the connector body 1 at a middle part of the connector body 1, and a plurality of claw parts 3a are arranged so as to protrude toward the central axis of the frame body 3b. The pull-out of the coaxial cable 7 is prevented by making the claw part 3 bite and hold the inserted coaxial cable 7. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a method for manufacturing a connector for a coaxial cable to be attached to an end portion of a coaxial cable.

When attaching a connector to a coaxial cable, in order to prevent the cable from coming off, a method of attaching the connector to the cable by caulking the ring part integrated with the ferrule or shell using pliers or special tools has been widely used. It had been.
However, this method has to be caulked using a tool, and the mounting work of the connector is troublesome. As described in Patent Document 1, the inner claw portion is provided on the inner cylinder portion and the outer cylinder portion is provided on the outer side. A configuration in which a claw portion is provided and a coaxial cable can be inserted into the connector, or as shown in Patent Document 2 previously filed by the present applicant, a ring-shaped retainer having a claw portion is attached to the coaxial cable. There is known a connector configuration in which a claw portion is inserted into a cable to prevent the cable from being pulled out and the cable is difficult to be pulled out without requiring a caulking process.

JP-A-11-288767 JP 2002-184536 A

However, although the technology disclosed in Patent Document 1 can be attached so that it is difficult to pull out from the connector simply by inserting the coaxial cable, it depends only on the frictional force between the claw and the cable in the direction of rotation of the cable. However, although the manufacturing method is simple, there is a problem that the cable easily rotates.
Further, the technology disclosed in Patent Document 2 prevents the cable from being pulled out by biting the claw portion provided in the stopper to prevent the cable from being pulled out without requiring a caulking process. For the force applied in the rotation direction, the nail biting force is used. However, in order to facilitate the insertion of the cable, the claw portion is formed of a thin plate conductive material having a spring property, and the surface formed by the tip portion of the claw portion is perpendicular to the cable axis. Therefore, there is a problem that the biting force alone is weak with respect to the force in the rotation direction of the cable. In addition, since a separate fixing tool for fixing the retainer is required, there are problems such as extra mold costs, and problems in manufacturing methods such as increased management and man-hours during production.
Accordingly, in view of the above problems, the present invention is to provide a coaxial cable connector that is not only easy to attach a coaxial cable but also has a configuration in which the coaxial cable is difficult to remove and difficult to rotate. .

In order to solve the above problems, the invention of claim 1 is a method of manufacturing a coaxial cable connector to be attached to an end of a coaxial cable, and is formed in a substantially hollow cylindrical shape to which a coaxial cable is inserted and attached. A connector body that is integrally formed with a belt-like protrusion that protrudes from the front and back toward the center so as to bite around the cable, and the wall thickness gradually decreases from the back to the rear end of the annular connection part and the tip is made thinner. , A sleeve part that is integrally formed in a conical shape and is inserted between the inner insulator and the outer conductor of the coaxial cable to be mounted, and a cylindrical fitting part that protrudes integrally from the front part of the annular coupling part A plurality of sleeve bodies, a ring-shaped frame body provided in the middle of the connector body so as to have the same central axis as the connector body, and a plurality of projections projecting from the frame body toward the central axis of the connector body With nail And a connecting means connected to the front of the sleeve body and connected to the connection object, and the stopper is placed on a step formed on the inner surface of the rear end of the connector body. After that, the rear end portion of the connector body is curled and attached, and the annular coupling portion and the fitting hole formed in the front direction of the connector body are press-fitted and fixed, and the cylindrical fitting portion and the connection The means means that the rear end of the connecting means is pivotally attached to the cylindrical fitting portion, and the coaxial cable end is inserted into the connector body from the rear by operating the means. Thus, the claw portion grips the periphery of the coaxial cable from a direction perpendicular to the central axis of the coaxial cable to prevent the coaxial cable from being pulled out, and the strip protrusion is coaxial from the direction parallel to the central axis of the coaxial cable. Food around the cable Is a method of manufacturing a coaxial cable connector that is configured to prevent rotation of the coaxial cable, characterized by writing.
With this configuration, rotation and removal of the coaxial cable can be prevented with a simple configuration, and a product in which members are integrated can be configured, so that it can be produced at low cost.

As described above, according to the coaxial cable connector according to the present invention, the coaxial cable attached to the connector does not come off even when a tensile stress is applied due to the action of the stopper, and can be securely attached. . Nevertheless, the coaxial cable is difficult to rotate in the mounted state, and a good connection state can be maintained, and the connector mounting is completed simply by processing the end of the coaxial cable into a predetermined shape and inserting it into the connector body. Installation is also easy. In addition, all the component parts can be mechanized in the manufacturing process, and each component part is integrated at the time of product shipment, so that it is possible to provide a highly productive coaxial cable connector, which in turn can provide a low cost. It is.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a first embodiment of a coaxial cable connector (hereinafter simply referred to as a connector) according to the present invention. The enlarged view of a part is shown.
In FIG. 1, reference numeral 1 denotes a cable mounting means inside, a cylindrical connector body that is externally fitted to a coaxial cable (hereinafter simply referred to as a cable), and 2 a nut as a connection means for connecting to a connection object such as a receptacle. Is the body. The cable mounting means includes a retainer 3 for preventing the mounted cable from coming off, a sleeve portion 6 inserted between the inner insulator 7b and the outer conductor 7c of the cable 7 to be mounted, and the nut body 2 to be pivotally mounted. It consists of a sleeve main body 46 composed of the fitting portion 16, and will be described in order below. Reference numeral 7a denotes a central conductor of the cable, and 7d denotes a protective coating.

First, as shown in the front view of FIG. 3A, the retainer 3 is formed in a substantially disc shape and is formed of an elastic metal, for example, stainless steel for springs.
The retainer 3 includes a ring-shaped frame 3b having the same central axis as the central axis of the connector main body 1, and a protrusion projecting toward the center line of the frame 3b on the inner side of the ring-shaped frame 3b. And a plurality of claw portions 3a.
The tip of the claw 3a has a trapezoidal shape in the embodiment of the present invention. However, if the cable can be easily inserted, the tip may be sharply sharpened, or the cable may be pulled out. In order to further increase the proof strength against the direction force, the inner diameter of the claw portion 3a is formed to be smaller than the outer diameter of the cable 7 to be attached, and the inner circumference is such that the tip thereof is in line contact with the cable 7. It may be formed by providing a radius that matches the diameter of the cable, and is not particularly limited, and may have an optimum shape for a predetermined holding force required to hold the cable.

Further, as shown in the end view of the line BB in FIG. 3 (b), the claw portion 3a is formed to be bent in the inner direction of the connector body 1 at the front of the connector with a bending angle θ of about 45 °, for example. The stopper 3 as a whole may have a substantially conical shape constricted forward.
By bending in this way, the diameter of the claw portion 3a is easily expanded during the cable insertion operation, so that the insertion operation can be carried out smoothly. Even if it is formed in this way, when a tensile stress is applied to the inserted cable, the claw portion 3a surely bites into the cable, so that it does not fall out. Further, the frame 3b of the retainer 3 has a predetermined plane portion formed in the outer peripheral direction, and is fixed by a method described in detail later in the connector body 1 in which the plane portion 3b is disposed. Therefore, since a large stress is applied to the cable, the frame 3b does not warp forward or backward, and the frame 3b is not deformed. The bending angle θ is maintained and the bite works well.

When the stopper 3 is manufactured, it is manufactured by punching, and then the claw portion 3a is bent. The punching of the claw portion 3a is preferably performed from the front (left side in FIG. 3B). By doing so, an end portion (the inner peripheral end portion on the left side of FIG. 3B) of the claw portion 3a on the opposite side is formed at an acute angle so that the cable 7 can be securely bitten. Can be made. In FIG. 3, six claw portions 3a are formed, but the number can be easily changed by changing the width of the notches.

Next, the connector main body 41 is provided with a fitting hole 42 for press-fitting and fixing an annular connecting portion 10 of a sleeve main body 46 to be described later at the front portion, and a cable insertion port 43 at the rear portion.
In addition, a protrusion protruding from the inner surface of the connector main body 41 toward the central axis direction, and formed as an anti-rotation means from the front to the rear of the coaxial cable housing space formed inside the connector main body 41. A plurality of straight belt-like protrusions 45 are formed. For example, the band-like protrusion 45 is formed in a rectangular shape or a triangular shape in cross section, and is formed at a predetermined height so as to bite into the protective covering of the coaxial cable when inserted from the cable insertion hole 43. . Further, in order to facilitate the insertion when the coaxial cable is inserted, in the embodiment of the present application, the front side is formed gradually lower toward the tip. The belt-like protrusion 45 is formed integrally with the connector body 1 and may be formed by a mold, for example, by a processing means such as electric discharge machining.
Further, the cable insertion hole 43 is formed with a stepped portion 43a inside the open end. The step 43a has a circumferential diameter that is large enough to allow the frame 3b of the retainer 3 to be inscribed therein, and is placed so that the frame 3b of the retainer 3 contacts the step 43a. After being placed, the tip end portion 43b of the cable insertion hole 43 is attached by mechanically reducing the diameter by spatula pushing or curling.
As a method for attaching the retainer 3, the connector main body 41 may be covered with a lid so as to cover the step 43a after the retainer is placed on the step 43a.

Next, the sleeve body 46 will be described. This sleeve main body 46 is formed in a conical shape integrally with a gradually decreasing thickness and a thin tip from the back to the rear end of the annular connecting portion 10 for connecting to the fitting hole 42 of the connector main body 41. A sleeve body 6 having an insertion hole 6a and a thin cylindrical fitting portion 16 for mounting the nut body 2 connected from the front portion of the annular connecting portion 10 are formed to protrude.
The cylindrical fitting portion 16 has an insertion hole through which the inner insulator 7b and the center conductor 7a of the cable 7 to be attached are inserted, and the inner diameter of the insertion hole 6a formed in the sleeve body 6 is the same. Yes. The nut body 2 is internally threaded and has a connecting hole 2a for inserting and fitting the cylindrical fitting portion 8 of the connector body 1 at the rear, and is rotatably connected by the cylindrical fitting portion 16. Has been. In addition, after the cylindrical fitting part 16 is fitted with the nut body 2, the tip part 16b is expanded in diameter, and the nut body 2 does not fall off.

Next, the procedure for assembling the connector and attaching it to the cable will be described. When assembling the connector, the retaining member 3 is first attached to the stepped portion 43a in the connector body 1, and the rear end portion 43b of the connector body 1 is reduced in diameter by curling or the like. To fix. Next, the annular connecting portion 10 provided in the sleeve main body 46 is inserted and connected to the fitting hole 42 formed at the rear of the connector main body 1. At this time, the annular connecting portion 10 is fixed and integrated by press fitting or the like. Then, after fitting the nut body 2 to the cylindrical fitting portion 16, the diameter of the fitting portion 16b is increased, whereby the nut body 2 is rotatably connected to the connector body 1 to complete the connector.

The mounting operation of the cable 7 is performed as follows. The end of the cable 7 to be inserted first is processed. Specifically, as shown in FIG. 1, the inner insulator 7b and the protective coating 7d are cut so that the center conductor 7a and the inner insulator 7b are exposed to a predetermined length, and the outer conductor 7c is placed on the protective coating 7d. I will scream. Thereafter, the cable 7 may be inserted into the connector body 1 from the rear.
FIG. 1 is a side explanatory view showing a state before the cable is inserted, and FIG. 2 is a side explanatory view showing a state in the middle of the cable insertion. FIG. The cable 7 is inserted up to a predetermined position where the protective coating 7d contacts the back of the front surface of the connector main body 1, more precisely, the annular connecting portion 10. By doing so, the sleeve portion 6 is inserted between the inner insulator 7b and the outer conductor 7c, and the outer conductor 7c and the connector body 1 are reliably electrically connected via the sleeve body 6, and the connector Due to the action of the band-shaped protrusions 11 formed on the inner periphery of the main body 41, the cable 7 is not easily rotated even when rotational stress is applied, and a good connection state can be maintained.
And the nail | claw part 3a acts so that the cable 7 may be pinched reliably as mentioned above. Furthermore, the tip of the center conductor 7a protrudes to the tip of the nut body 2, and the center conductor of the cable 7 is disposed on the center axis (M) of the nut body 2 to obtain the center conductor of the connecting means.

The outer conductor 7c of the coaxial cable is generally composed of a net-like conductor and an aluminum foil 7e provided on the inside thereof. When the aluminum foil 7e is provided in this way, the cable end portion is processed. The sleeve body 6 is inserted between the aluminum foil 7e and the net-like conductor (the above-described external conductor 7c) while keeping the aluminum foil 7e along the inner insulator 7b without scooping.

As described above, the coaxial cable attached to the connector does not come off even when a tensile stress is applied due to the action of the stopper, and can be firmly attached. Nevertheless, the retainer can smoothly insert the cable, and the strip-like protrusion 45 formed on the inner surface of the connector main body 41 can prevent the rotational stress of the attached cable and maintain a good connection state.

As described above, since the band-like protrusion 45 is formed inside the connector main body 41, the sleeve body enters between the inner insulator and the outer conductor by the coaxial cable insertion operation, and the protective coating rises around the sleeve body. As a result, the belt-like protrusion 45 surely bites into the protective coating. That is, according to this embodiment, the protective covering of the coaxial cable is held by the claw portion 3a of the stopper 3 at the rear end of the connector main body 41 in the mounted state, and the front end of the coaxial cable is The sleeve body 6 is clamped from the outside by the belt-like protrusion 45, and has an excellent holding force and can reliably prevent the rotation of the coaxial cable.
In this embodiment, since the structure is simple and can be automated, the material cost and assembly process can be reduced, and the product cost can be reduced. Therefore, a structure suitable for a coaxial cable connector that is required to be reduced in price. It can be provided.
In the above-described embodiment, the connector main body 41 has a cylindrical shape, but other shapes, for example, a hexagonal prism shape may be used. Further, the connecting means may be a shape other than the plug or receptacle structure, for example, a connector used for connection to the outside such as an electronic device box, and if the cable mounting means in the connector main body is configured as described above, The pulling out action can be exhibited well.
In addition to the method of forming the belt-like protrusion 45 inside the connector body 41 as in this embodiment, the belt-like protrusion may be formed on the sleeve portion 6.
In addition, although an example in which the release function is not provided in the embodiment has been described, it is needless to say that a releaser may be provided as long as it is used for a part that requires the release function.

It is sectional drawing of the state which showed 5th Embodiment of the connector for coaxial cables which concerns on this invention, and inserted the coaxial cable. The state before inserting a coaxial cable in the connector for coaxial cables of FIG. 1 is shown. The retainer is shown, (a) is a front view, (b) is a cross-sectional view along the line BB.

Explanation of symbols

  1 ··· Connector body, 2 · · Nut body (connecting means), 3 · · Stopper, 3a · · Claw, 3b · · Frame, 6 · · Sleeve, 7 · · Coaxial cable, 16 tubes Fitting part, 41 .. connector body, 42 .. fitting hole, 43 .. cable insertion hole, 45 .. belt-like projection (rotation prevention means), 46.

Claims (1)

In the manufacturing method of the coaxial cable connector to be attached to the end of the coaxial cable,
A connector main body integrally formed with a belt-like protrusion that protrudes from the front and back toward the center so as to bite around the coaxial cable;
A sleeve portion that is formed between the inner insulator and the outer conductor of the coaxial cable to be attached, which is formed in a conical shape with a gradually decreasing thickness and a thin tip from the back portion to the rear end portion of the annular connecting portion. And a sleeve body comprising a cylindrical fitting portion integrally projecting from the front portion of the annular coupling portion,
An omission provided with a ring-shaped frame provided inside the connector main body so as to have the same central axis as the connector main body, and a plurality of claws protruding from the frame toward the central axis of the connector main body With a stop,
A connection means coupled to the front of the sleeve body for connecting to the connection object;
Consisting of
The retainer is mounted on a step formed on the inner surface of the rear end of the connector body, and then attached by curling the rear end of the connector body.
The annular connecting portion and the fitting hole formed in the front direction of the connector main body are press-fitted and fixed,
The cylindrical fitting portion and the connection means are pivotally attached to a rear end portion of the connection means so as to be rotatable with respect to the cylindrical fitting portion,
By
By inserting the end of the coaxial cable into the connector body from the rear side, the claw portion bites the periphery of the coaxial cable from the direction perpendicular to the central axis of the coaxial cable to prevent the coaxial cable from being pulled out. In addition, a method for manufacturing a connector for a coaxial cable configured to prevent rotation of the coaxial cable by the belt-like protrusions biting around the coaxial cable from a direction parallel to the central axis of the coaxial cable.

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