JPH0224218Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a shield for a connecting portion between a communication cable and a connector.

Prior Art As shown in FIG. 2, a conventional shielding body is formed by covering a communication line 1 with an insulating layer 2, and forming a cylindrical body by braiding a metal wire on the outside of the insulating layer 2. A metal wire layer 3 is provided to shield the communication line 1. In addition, the shielding at the connection part is done by the metal wire layer 3.
A folded part is formed by expanding the vicinity of the edge of the protective insulating layer 4 so as to cover the outer surface of the edge of the protective insulating layer 4, and a base part into which the folded part is inserted is connected to a connector to which the communication line 1 is connected. It is formed by providing a metal cylindrical body 7 provided with an engaging portion that engages with the outer peripheral surface of the socket 6. 8 in the figure is a protective insulating layer that protects the metal cylindrical body 7.

Problems to be Solved by the Invention In the conventional example, the folded portion of the metal wire layer 3 formed by expanding the outer surface of the edge of the protective insulating layer 4 is as follows.
The cylindrical openings formed by weaving must be unraveled to form a group of radial metal wires, and then the metal wires must be expanded and formed, making it difficult to provide the folded portions densely and uniformly. Therefore, there are problems in that the metal wire layer 3 and the metal cylinder do not come into sufficient contact and that a gap is created between the contact surfaces, which has the disadvantage that the shielding effect in this area is significantly reduced.

Means for Solving the Problems This invention solves the above problems by forming a double layer in which the folded portion of the metal wire layer formed on the outer surface of the protective insulating layer remains in a woven state. At the same time, a locking protrusion is provided on the inner circumferential surface of the metal cylindrical body covering this part, and the contact between the metal wire layer and the metal cylindrical body is formed tightly without any gaps, thereby connecting the communication cable and the connector. The purpose is to provide partial shielding.

Embodiments This invention will be explained in detail based on illustrated embodiments.

FIG. 1 is an enlarged sectional view of a connecting portion between a communication cable and a connector provided with a shield according to this invention. In the figure, 10 is a communication line, 20 is an insulating layer, 30 is a metal wire layer, 40 is a protective insulating layer, 50 is a connection terminal of a connector, 60 is a connection socket, 70 is a metal cylinder, 8
0 is a protective insulating layer. In the illustrated embodiment, the communication line 10 is formed of a single line, but even if the communication line 10 is formed of a plurality of lines, the shielding body remains the same. The communication line 10
is formed by exposing the vicinity of the connection end. That is, at approximately the same position, the insulating layer 20, the metal wire layer 30, and the protective insulating layer 40 are removed, and only the communication line 10 made of the metal wire is formed to protrude. The insulating layer 20 is
It is formed by covering the communication line 10 concentrically with a synthetic resin material. The same applies to a communication cable formed by bundling a plurality of communication lines 10 provided with an insulating layer 20. The metal wire layer 30 forms a shield for the communication line 10 portion, and is formed into a cylindrical body by braiding metal wires. Further, the metal wires are formed closely so that there are no gaps, and a single communication wire or a plurality of communication wires 10 provided with an insulating layer 20 are inserted inside.

As shown in FIG. 3, the metal wire layer 30 is arranged in a woven state on a plane perpendicular to the axis of the cylindrical body, spaced apart from the cut end, and in a flange shape protruding in the radial direction. A body 31 is provided and formed. Protective insulation layer 4
0 forms the outer surface of the communication cable, and is formed by covering the outer surface of the metal wire layer 30 with a synthetic resin material or a rubber material concentrically. The protective insulating layer 4
0 is formed by providing an edge protection insulating layer 41 also on the cut end side with the brim 31 of the metal wire layer 30 interposed therebetween.
In this case, the brim-shaped body 31 can be easily formed by the following method. That is, first, at the same position as the insulating layer 20, the middle portion of the protective insulating layer 40 is removed and formed at a distance corresponding to the edge protective insulating layer 41 from the cut end of the cut and removed protective insulating layer 40. . The distance between the intermediate portions is set to be at least twice the diameter of the metal wire layer 40. In this state, while lightly pressing the edge protection insulating layer 41, it is moved along the metal wire layer 30 so as to reduce the removed intermediate portion. The metal wire layer 30 is deformed while forming an outward convex shape approximately at the midpoint of the intermediate portion, and forms a brim-like body 31 in a knitted state. The metal wire layer 30 is further formed by pressing and overlapping a flange-like body 31 onto the outer surface of the protective insulating layer 40, as shown in FIG. Alternatively, as shown in FIG. 4, they are formed in an overlapping manner on the outer surface of the edge protection insulating layer 41.

The metal cylindrical body 70 is formed of a metal material into a thin-walled cylindrical body, and has one opening provided with a base portion 71 into which the metal wire layers 30 formed in a stacked manner are tightly inserted, and the other opening. is formed into an engaging portion 72 that tightly engages with the outer peripheral surface of the connector socket 60, and the intermediate portion is formed into a stepped cylindrical body 73 having a different diameter. In this case, the inner peripheral surface of the cap portion 71 has a sliding slope 74 whose cross-sectional diameter gradually decreases toward the opening end, and an arc-shaped curved surface that is connected to the sliding slope and forms a convex surface toward the axis. A locking portion 75 is formed, and a locking slope 76 is provided and connected to the locking portion 75 to restore the reduced cross-sectional diameter.

The connection between the communication cable and the connector is the communication line 1.
Connect the protruding end of 0 to the connecting terminal 50 of the connector, insert the communication cable from the other end into the engaging part 72 of the metal cylinder 70, and connect the engaging part 72 to the outer peripheral surface of the connector socket 70. At the same time, the cap part 71 is covered with the metal wire layer 3 formed in an overlapping manner with the brim-like body 31, and the outer surface of the metal wire layer 3 is pressed by the locking part 75 to bring them into tight contact. . Protective insulating layer 80
protects the outer surface of the metal cylindrical body 70, and is formed by molding a synthetic resin material or a rubber material approximately following the outer shape of the metal cylindrical body 70.

This invention is constructed as claimed in the utility model registration claim based on the above-mentioned embodiment, so that the metal wire layers in contact with the mouthpiece of the metal cylinder are formed in a layered manner in a woven state, so that the wires are is dense, with no gaps,
In addition, since it makes tight contact with the locking part of the cap, there is no break in the shield, making it possible to provide a shield with a complete shielding effect.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view of a joint provided with a shield according to this invention, FIG. 2 is an enlarged sectional view of a conventional joint, and FIG. 3 is an enlarged sectional view of a brim-shaped body. FIG. 4 is an enlarged sectional view of a connecting portion in another embodiment. DESCRIPTION OF SYMBOLS 10... Communication line, 20... Insulating layer, 30... Metal wire layer, 32... Turning part, 40, 80... Protective insulating layer, 50... Connection terminal, 60... Connector socket, 70... Metal cylindrical body, 71...cap part, 72...
...Engaging part, 75...Locking part.

Claims (1)

[Scope of utility model registration request] A part of the metal wire layer 30 provided outside the insulating layer 20 by knitting metal wires and forming it into a cylindrical shape is extended in the radial direction on a plane perpendicular to the axis, with the inner peripheral surfaces touching each other. A folded portion 32 formed on the flanged body 31 and formed by bending the flanged body 31 so that one flanged surface is in contact with the outer surface of the protective insulating layer 40 formed on the outside of the metal wire layer 30; A locking portion 75 formed in a convex shape on a part of the inner circumferential surface so as to provide a convex surface on the inside.
A metal cylindrical body 70 is formed by connecting a base part 71 with a thin stepped cylindrical body 73 and an engaging part 72 that tightly fits the outer circumferential surface of the connector socket 60.
and the locking part 75 of the cap part 71 is connected to the metal wire layer 30.
1. A shield for a connecting portion in a communication cable, characterized in that it is formed by contacting the outer surface of a folded portion 32 with mutual pressure, and at the same time, an engaging portion 72 is engaged with a connector socket 60.