JP2006032299A - Coaxial-cable connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial-cable connector capable of preventing rotation of the coaxial cable to get rid of worker's apprehension, and as a result, working efficiency is improved. <P>SOLUTION: The coaxial-cable connector is provided with an insertion-fitting part mounted at an end part of the coaxial cable. The insertion-fitting part is provided with a cylindrical-shape connector main body 1, an anti-slip-off tool 3, a cylindrical fixing tool 5 fixing the anti-slip-off tool 3 to the connector main body 1, and a rotation-inhibiting means 4 for inhibiting rotation of the inserted coaxial cable, as well as a connection cylinder 2 formed so as to be pivotally supported to the other end of the connector main body and to be screwed to an outer conductor as an object for connection. The anti-slip-off tool 3 has a ring-shaped frame body 3b and a plurality of claw parts 3a set in protrusion toward a center of the frame body and set inside so as to have the same central axis with the connector main body 1 at the center of the connector main body 1, and the rotation-inhibiting means 4, while inhibiting the coaxial cable 7 inserted through the cylindrical fixing tool 5, prevents the anti-slip-off tool 3 from being pulled off. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a coaxial cable connector that is attached to an end of a coaxial cable for connecting the coaxial cable to a casing of an electronic device, and more particularly to a coaxial cable connector that can prevent rotation of the coaxial cable.

When a coaxial connector is attached to a coaxial cable, conventionally, it has been fixed by caulking with an annular bracket for preventing the cable from coming off. (For example, refer to Patent Document 1).
Also, as a fixing method other than caulking, there is known a coaxial cable connector in which a ring-shaped retaining member having a claw is fitted on the coaxial cable so that the claw is cut into the cable to prevent the cable from coming off. ing. (For example, refer to Patent Document 2).

JP 11-288767 A JP 2002-184536 A

However, in the techniques disclosed in Patent Documents 1 and 2, the contact portion between the coaxial cable and the coaxial connector slips when the coaxial cable is rotated around the axis after the coaxial cable is attached to the coaxial connector. As a result, the coaxial cable rotates.
As described above, when the coaxial cable rotates, the worker feels uneasy, and there is a problem that the work efficiency is reduced due to the time required for the work.
There is also a problem that the risk of contact failure increases with time.

In view of this, the present application has been made to solve these problems, and its purpose is to provide a coaxial cable connector that allows easy installation and fixing of a coaxial cable without using pliers or dedicated tools. is there.
Another object is to provide a coaxial cable connector that prevents the rotation of the coaxial cable to remove the operator's anxiety and, as a result, improves the work efficiency.
Another object is to provide a coaxial cable connector that does not cause poor contact even when the coaxial cable is plastically deformed due to aging.
The other purpose is to reduce the coaxial cable insertion blocking force by the claw and to facilitate the connection work of the coaxial cable. Furthermore, by increasing the biting angle of the claw tip with respect to the coaxial cable, a strong retaining is provided. It is to provide a connector for a coaxial cable from which a force can be obtained.
Another object of the present invention is to provide a coaxial cable connector in which the rotation prevention force of the coaxial cable does not change even if the outer dimensions of the coaxial cable change slightly.
Another object of the present invention is to provide a coaxial cable connector that can be easily attached when the coaxial cable is attached to the coaxial connector.

In order to solve the above-mentioned problems, the invention of claim 1 is a coaxial cable connector having an insertion portion to be attached to an end portion of the coaxial cable, the insertion portion including a cylindrical connector body, a disconnection portion, A stopper, a cylindrical fastener for fixing the stopper to the connector body, and rotation preventing means for preventing rotation of the inserted coaxial cable, and pivotally attached to the other end of the connector body And a connecting cylinder formed so as to be screwed to the external conductor to be connected. The retainer includes a ring-shaped frame and a plurality of claws from the frame toward the center of the frame. Protrusively installed in the middle of the connector body so as to have the same central axis as the connector body, and the rotation prevention means prevents rotation of the coaxial cable inserted through the fixture, while the stopper Is configured to prevent withdrawal .

According to a second aspect of the present invention, in the coaxial cable connector according to the first aspect, the claw portion of the retaining member protrudes from the frame body toward the insertion direction of the coaxial cable and from the protruding direction of the base of the claw portion. Is also formed and configured such that the protruding direction of the tip of the claw portion faces the inside of the frame.

According to a third aspect of the present invention, in the coaxial cable connector according to the first or second aspect, a sleeve body is provided in the connector body between the inner insulator and the outer conductor of the coaxial cable to be mounted. Configured to let

According to a fourth aspect of the present invention, in the coaxial cable connector according to the third aspect, the sleeve body is configured to be movable in the axial direction of the coaxial cable.

According to the first aspect of the present invention, there is provided a coaxial cable connector having an insertion portion to be attached to an end portion of the coaxial cable, the insertion portion including a cylindrical connector body, a retaining member, and the removal portion. A cylindrical fixture for fixing the stopper to the connector main body and a rotation prevention means for preventing rotation of the inserted coaxial cable, and pivotally attached to the other end of the connector main body and externally connected A connecting cylinder formed so as to be screwed into a conductor, and the retainer includes a ring-shaped frame and a plurality of claw portions projecting from the frame toward the center of the frame, and the connector An inner part of the main body is provided so as to have the same central axis as that of the connector main body, and the coaxial cable inserted through the fixing tool is prevented from being pulled out while the rotation preventing means prevents rotation. Because it was configured to
To provide a coaxial cable connector that can easily install and fix a coaxial cable without using pliers or a special tool, and prevents the operator from worries by preventing the rotation of the coaxial cable, thereby improving work efficiency. be able to. In addition, it is possible to provide a connector for a coaxial cable that does not cause poor contact even when the coaxial cable is plastically deformed over time.

According to a second aspect of the present invention, in the coaxial cable connector according to the first aspect, the claw portion of the retainer protrudes from the frame toward the insertion direction of the coaxial cable, and the protrusion of the base of the claw portion is provided. Since the projecting direction of the tip of the claw part is directed to the inside of the frame rather than the direction,
In addition to the effect of claim 1, the insertion prevention force of the coaxial cable by the claw portion can be weakened, the connection work of the coaxial cable can be easily performed, and the biting angle at the tip of the claw portion with respect to the coaxial cable can be increased. It is possible to provide a coaxial cable connector capable of obtaining a strong retaining force.

According to a third aspect of the present invention, in the coaxial cable connector according to the first or second aspect, the sleeve body is inserted into the connector body between the inner insulator and the outer conductor of the coaxial cable to be mounted. Because it was configured to provide
In addition to the above effects, it is possible to provide a coaxial cable connector in which the rotation prevention force of the coaxial cable does not change even if the outer dimensions of the coaxial cable change slightly.

According to the invention of claim 4, in the coaxial cable connector according to claim 3, the sleeve body is configured to be movable in the axial direction of the coaxial cable.
In addition to the above effects, it is possible to provide a coaxial cable connector that can be easily attached when the coaxial cable is attached to the coaxial connector.

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.

1A and 1B show a first embodiment of a connector for a coaxial cable to which the present invention is applied, FIG. 1A is a side view showing a partial cross section before inserting a coaxial cable, and FIG. 1B is a part after inserting the coaxial cable. It is the side view shown with the cross section.
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 attaching means includes a retaining tool 3 for preventing the attached cable from coming off, a locking body (rotation preventing means) 4 for preventing the cable from rotating, a fixing tool 5 for fixing the retaining tool 3, and a cable 7 to be attached. It consists of an outer conductor (aluminum foil) 7c and a sleeve body 6 inserted between the outer conductors 7d. 7a is a central conductor of the cable, 7b is an internal insulator, 7c is an external conductor (aluminum foil), 7d is an external conductor (network conductor), and 7e is a protective coating.

Both the connector body 1 and the nut body 2 are made of a conductive material. The connector main body 1 has a cable insertion port at the rear, and a small-diameter cylindrical fitting portion 8 for attaching the nut body 2 to the front is formed to protrude, and the cable 7 to be attached is attached to the cylindrical fitting portion 8. An insertion hole 8a is formed through which the inner insulator 7b, the outer conductor (aluminum foil) 7c, and the center conductor 7a are inserted. The nut body 2 is internally threaded and has a connecting hole 2a through which the cylindrical fitting portion 8 of the connector body 1 is inserted and fitted, and is rotatably connected to the front surface of the connector body 1. ing. In addition, after the cylindrical fitting part 8 is fitted with the nut body 2, the tip part 8b is expanded in diameter, and the nut body 2 does not fall off.
In the present embodiment, the nut body is used, but a bolt body with externally threaded external parts may be used, and the present invention is not limited to the screw type, and any connection is possible as long as it can be reliably connected to the connection target. For example, it may be a combined body using a leaf spring or the like.

As shown in the front view of FIG. 4A, the retainer 3 is formed in a substantially disk shape, and is made of an elastic metal, for example, stainless steel for springs. Then, notches 3d, 3d,... Are formed radially from the inner peripheral side, the inner peripheral portion is a holding portion 3a for holding the coaxial cable, and the outer peripheral portion is a locking portion 3b for locking and fixing to the connector body 1. is there. Further, the inner diameter is formed smaller than the outer diameter of the cable 7 to be attached, and the inner periphery is formed with a radius matching the diameter of the cable so that the tip of the holding portion 3a is in line contact with the cable 7. By making line contact with the cable in this way, it is possible to reliably hold the device and improve the retaining force as compared with the conventional retaining member that has a sharp end and bites into the cable.
In this embodiment, 16 claw pieces are provided, but the number is not limited to this number, and may be more or less than 16. In this embodiment, the tip of the biting portion 3a is rounded. However, by increasing the number of nail pieces (the biting portion 3a) to about ten, the tip of the nail piece can be cut into a cable even if it is cut in a straight line. Line contact is possible, and the jaws move well.

As shown in the sectional view taken along the line BB in FIG. 4B, the biting portion 3a is formed with a bending angle θ of about 45 ° in the inner direction of the connector main body 1 in front of the connector, and is prevented from coming off. The tool 3 as a whole has a substantially conical shape constricted forward.
By bending in this way, the retainer 3 is elastic in the radial direction and the holding portion 3a is also expanded and contracted in the radial direction. Therefore, the insertion operation can be carried out smoothly. Also, when a tensile stress is applied to the inserted cable, the biting part surely bites into the cable so that it does not fall out.

The locking body 4 functions as rotation preventing means. FIG. 2 shows the locking body 4, (A) is a side view of the locking body, and (B) is a front view of the locking body. As shown in FIG. 1, the locking body 4 is formed in a cylindrical shape having the same length as the sleeve body 6. Then, the slit 4a is provided so that the diameter can be changed, the spring is made of stainless steel so as to have elasticity in the entire radial direction, and the locking blades 4d are punched and formed at four locations around the periphery.
Reference numeral 4b denotes an opening punched out to form the locking blade 4d. The locking blade 4d is formed by bending inwardly on one side of the opening 4b, and the central axis of the connector is the central axis of the connector. The strips are formed in parallel. Further, the front end portion that bites into the coaxial cable 7 is formed at an acute angle when punching out, so that the tip portion can easily bite into the protective coating 7d of the coaxial cable 7. The protruding amount of the locking blade 4d is set so that the gap between the sleeve body 6 and the sleeve 4 when assembled to the connector body 1 is smaller than the thickness of the protective coating 7d of the coaxial cable 7 to be inserted. Yes. Note that only one locking blade 4d may be provided.
Further, the rear end portion 4e on the coaxial cable 7 insertion side is expanded so that the coaxial cable 7 can be easily inserted.
And the recessed part (not shown) which latches the processus | protrusion 4c for making it engage with the cyclic | annular connection part 9 is provided in two places which the locking body 4 front faces.

The locking body 4 formed in this way is assembled together when the annular connecting portion 9 is assembled, and one end of the locking body 4 is locked to the connector body 1 and connected to the connector body. Then, the locking blade 4d can be bitten into the protective coating 7d of the inserted coaxial cable 7.
Further, the inserted coaxial cable does not rotate due to the locking body. In particular, by disposing the locking body so as to cover the sleeve body, the coaxial cable insertion operation causes the sleeve body to enter between the inner insulator and the outer conductor, and the protective coating rises around the sleeve body. , The locking blade securely bites into the protective coating. Therefore, the rotation of the coaxial cable can be reliably prevented. In addition, since the locking body has elasticity, the rotation prevention function of the coaxial cable can be maintained even when the protective coating of the coaxial cable changes due to aging.

The fixing tool 5 is for fixing the stopper 3 to the connector body 1. Even in the fixed state, the retainer 3 can be rotated about the axis. As described above, the distal end of the holding portion 3a of the retainer 3 bites into the protective coating 7e of the cable 7 to perform the holding operation. Further, the end of the cable is prevented from rotating by the locking body 4, but the position of the operating point of the locking body is different from the position of the operating point of the retainer. When the other end of the cable is rotated around the central conductor, it is considered that the cable rotates slightly at the point of action of the retainer. Therefore, the protective coating 7e of the cable 7 is prevented from being cut off due to this rotation. As described above, since the stopper 3 can be rotated, it is possible to prevent breakage of the protective covering of the cable. In particular, in the case of a cable having a small diameter, or when the position of the action point of the locking body and the position of the action point of the retainer are separated, the effect is great.

The sleeve body 6 is integrally formed on the back portion of the annular coupling portion 9 for coupling to the connector body 1 and is formed in a conical shape with a gradually decreasing thickness and a narrowed tip toward the rear end portion. However, the through hole is formed to have the same diameter as the through hole of the connector body 1. This facilitates insertion between the outer conductor (aluminum foil) 7c of the cable 7 and the outer conductor 7d.

Next, the procedure for assembling the connector and attaching it to the cable will be described. In assembling the connector, first, an annular connecting portion 9 having a sleeve body 6 is press-fitted into the connector main body 1 via a locking body 4 from behind, and is connected and fixedly integrated. At this time, the protrusion 4c for locking to the annular connecting portion 9 is fitted in the recess provided in the sleeve. And after fitting the nut body 2 to the cylindrical fitting part 8, the nut body 2 is rotatably connected to the connector main body 1 by expanding the tip part 8b of the fitting part 8. Thereafter, the retainer 3 is inserted, and the fixture 5 is press-fitted into 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 as shown in FIG. The cable 7 is inserted up to the back of the front surface of the connector main body 1 (more specifically, at a predetermined position where the protective coating 7d contacts the annular connecting portion 9). By doing so, the sleeve body 6 is inserted between the outer conductor (aluminum foil) 7c and the outer conductor 7d, the protective coating rises around the sleeve body, and the locking blade surely bites into the protective coating. As a result, even if rotational stress is applied to the cable, it does not rotate easily and a good connection state can be maintained.
By the way, there is an error (about 10%) in the outer diameter of the cable depending on the manufacturer and type, but this error can be absorbed by using a sleeve.

In this way, the coaxial cable with the connector attached does not come off even when a tensile stress is applied by the action of the retainer, and can be securely attached.
Moreover, since the stopper is entirely elastic in the radial direction, the cable can be smoothly inserted. In addition, since the rotation preventing means is provided, the cable is not easily rotated even if the cable is subjected to a rotational stress, and the operator's anxiety is removed, and as a result, the work efficiency can be improved. Furthermore, even if the coaxial cable is plastically deformed over time, durability is improved without causing contact failure.

Next, a second embodiment of the present invention will be described with reference to FIG. In the following description, the same components as those of the coaxial cable connector of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
In contrast to the coaxial cable connector of the first embodiment, the coaxial cable connector of the second embodiment has a connector body in which an annular groove 11 having an inner diameter corresponding to the outer diameter of the cable is formed instead of using the sleeve 6. 100.
Further, the coaxial cable connector of the second embodiment is different in the method of the cable rotation prevention means. In the first embodiment, a separate locking member 4 is used as the rotation prevention means. In the embodiment, a band-shaped protrusion 10 is further formed inside the annular groove 11 formed inside the connector main body 100. The length at the tip of the opposing band-shaped protrusion 10 is shorter than the diameter of the cable. By inserting the cable into the connector main body 100, the band-shaped protrusion bites into the protective coating 7e of the cable, and rotational stress is applied to the cable. The cable will not rotate easily.
In addition, as the diameter of the connector main body 100 becomes smaller, the diameters of the retainer and the fixing tool are set to corresponding dimensions. Specifically, the diameters of the locking portion 30 b of the stopper 30 and the fixing tool 50 are dimensions corresponding to the connector main body 100. 5A is a front view of the retainer 30 and FIG. 5B is an end view taken along the line CC.

Next, a third embodiment of the present invention will be described with reference to FIG. In the following description, the same components as those of the coaxial cable connector of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
In contrast to the coaxial cable connector of the first embodiment, in the coaxial cable connector of the third embodiment, the sleeve body 60 moves in the axial direction of the connector main body 110. With this configuration, the cable can be easily fitted when the cable is inserted. Reference numeral 61 denotes a spring spring. The sleeve body is always moved to the end of the connector main body 110 by the spring force.
Further, as in the second embodiment, an annular groove 11 of the connector main body 110 is formed, and a belt-like protrusion 10 is formed inside thereof. The length at the tip of the opposing band-shaped protrusion 10 is shorter than the diameter of the cable. When the cable is inserted into the connector body 110, the band-shaped protrusion bites into the protective coating 7e of the cable, and rotational stress is applied to the cable. However, the cable does not rotate easily.

It should be noted that the present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing each part without departing from the spirit of the present invention, as exemplified below.
For example, it may be formed integrally with the casing of the electronic device as a connection means of the electronic device that connects the coaxial cable.

1 shows a first embodiment of a connector for a coaxial cable to which the present invention is applied, (A) is a side view showing a partial cross section before inserting a coaxial cable, and (B) is a partial cross section after inserting the coaxial cable. FIG. 1 shows the locking body of FIG. 1, (A) is a side view with a partial cross section, and (B) is a front view. FIG. 2 shows a second embodiment of a connector for a coaxial cable, (A) is a side view showing a partial cross section before inserting the coaxial cable, (B) is a side view showing a partial cross section after inserting the coaxial cable, C) is a front view. FIG. 1 shows the retainer of FIG. 1, (A) is a front view, and (B) is an end view taken along line BB. 3 shows the retainer of FIG. 3, in which (A) is a front view and (B) is an end view taken along the line CC. 3 shows a third embodiment of a coaxial cable connector, (A) is a side view showing a partial cross section before inserting a coaxial cable, (B) is a side view showing a partial cross section during the insertion of the coaxial cable, C) is a side view showing a partial cross section after the coaxial cable is inserted, and (D) is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Connector main body, 2 ... Nut body, 3 ... Detachment tool, 4 ... Locking body (rotation prevention means), 5 ... Fixing tool, 6 ... Sleeve body, 7 ... Coaxial cable, 8 ... Cylindrical fitting part, DESCRIPTION OF SYMBOLS 9 ... Annular connection part, 10 ... Band-shaped protrusion (rotation prevention means), 11 ... Annular groove, 30 ... Detachment tool, 50 ... Fixing tool, 60 ... Sleeve body, 61 ... Spring, 100 ... Connector main body, 110 ... Connector main body .

Claims (4)

A coaxial cable connector having an insertion portion to be attached to the end of the coaxial cable,
The insertion portion includes a cylindrical connector body,
A retainer, and a tubular retainer for securing the retainer to the connector body;
Rotation prevention means for preventing rotation of the inserted coaxial cable,
A connecting cylinder pivotally attached to the other end of the connector body and formed so as to be screwed to an external conductor to be connected;
The retaining device includes a ring-shaped frame body and a plurality of claw portions projecting from the frame body toward the center of the frame body, and an inner portion of the connector body having the same central axis as the connector body. The coaxial cable connector is characterized in that the coaxial cable inserted through the fixing member is prevented from being pulled out while the rotation preventing means prevents rotation.
The claw part of the retainer protrudes from the frame toward the insertion direction of the coaxial cable, and the protruding direction at the tip of the claw part faces the inside of the frame rather than the protruding direction of the base of the claw part. The coaxial cable connector according to claim 1, wherein the coaxial cable connector is formed as described above.
The coaxial cable connector according to claim 1 or 2, wherein a sleeve body is provided in the connector main body between the inner insulator and the outer conductor of the coaxial cable to be mounted.
The coaxial cable connector according to claim 3, wherein the sleeve body is provided so as to be movable in an axial direction of the coaxial cable.

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