JPH0758628B2 - Cable clamp structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] A clamp structure for a cable that holds a coaxial cable braid by clamping the coaxial cable so that the electrical characteristics are not adversely affected by a reliable clamp. For this purpose, a coaxial cable having a braid covering the outer periphery of the insulator, a cylinder of a predetermined length made of a conductive material, and a clamp for sandwiching the braid are provided, and the cylinder includes the braid and the insulator. And the braid is clamped by the clamp and the outer ring of the cylinder so that the coaxial cable is locked at a predetermined position.

[Industrial application field]

The present invention relates to a cable clamp structure for locking a coaxial cable by sandwiching the braid of the coaxial cable with a clamp.

When a coaxial cable is connected to an electronic device by wiring, it is generally installed as shown in FIG.

FIG. 6 is a wiring connection explanatory view of a coaxial cable, (a) is a plan view and (b) is a side view.

As shown in (a) of FIG. 6, the coaxial cable 5 is connected to the electronic device 20 formed by mounting the component 22 on the housing 21.
When laying the cable, the clamp 5 is provided at a predetermined position of the housing 21, and the coaxial cable 5 is locked by the clamp 5.

Further, the clamp 5 includes a base plate 5B fixed to the housing 21, and a base plate 5B.
It is composed of a holding plate 5A that is locked to 5B, and a holding plate 5A
The coaxial cable 5 is clamped at a predetermined position by sandwiching the coaxial cable 5 between the base plate 5B and the base plate 5B, and a predetermined signal is input to and output from the electronic device 20 via the coaxial cable 5. ing.

In addition, such sandwiching of the coaxial cable 5 is usually performed at the exposed portion of the braid 2, and the braid 2 is connected to the ground to provide shielding.

Therefore, in the laying of the coaxial cable 5 as described above, the coaxial cable 5 is formed so as to be securely locked to the housing 21 and to have a shield effect for a signal input / output through the coaxial cable 5. It is very important to.

[Conventional technology]

Conventionally, it was formed as shown in FIG. 4 and FIG. FIG. 4 is a conventional perspective view, and FIG. 5 (a) (b).
(C) is a terminal treatment process drawing of the conventional coaxial cable.

As shown in FIG. 4, the terminal-treated coaxial cable 1 is arranged on the base plate 5B forming the clamp 5, the pressing plate 5A is further overlaid, and the screw 23 is inserted into the through hole 5C, and the screw 23 is attached. By being screwed into the screw hole 5D, the clamp shown by the arrow is performed.

In this case, the braid 2 of the coaxial cable 1 includes the holding plate 5A and the base plate 5B.
The braid 2 is sandwiched between the pressing plate 5A and the base plate 5B and is connected to the ground, so that the braid 2 is shielded.

In the end treatment of the coaxial cable 1, as shown in FIG. 5 (a), first, the jacket 6 of the end to be connected is removed, the braid 2 is exposed, and the insulator 3 is removed. , The core wire 7 is projected.

Next, as shown in (b), the braid 2 is folded back, and the folded back end is pressed by a shrink tube 8 made of an insulating material as shown in (c).

By doing so, the exposed portion of the braid 2 is formed, and the exposed portion is clamped by the holding plate 5A and the base plate 5B.

[Problems to be Solved by the Invention]

However, by sandwiching the portion formed by folding back such a braid 2 by the holding plate 5A and the base plate 5B, the insulator 3 will be deformed if the pressing force for sandwiching is strong.

Therefore, the distance between the core wire 7 and the braid 2 is close to each other, which affects the electrical characteristics, and in the worst case, there is a problem that a short circuit occurs.

In addition, the deformation of the insulator 3 reduces the contact pressure between the braid 2 and the pressing plate 5A and the base plate 5B, so that reliable locking is not performed, and further, the contact resistance increases, so that the shield effect decreases. Had.

Therefore, it is an object of the present invention to prevent the electric characteristics from being adversely affected by a reliable clamp.

[Means for Solving the Problems]

 FIG. 1 is an explanatory view of the principle of the present invention.

As shown in FIG. 1, a coaxial cable 1 having a braid 2 covering the outer periphery 3A of the insulator 3, a cylinder 4 of a predetermined length made of a conductive material, and a clamp 5 for sandwiching the braid 2 are provided, The tube 4 is inserted between the braid 2 and the insulator 3,
Is clamped by the clamp 5 and the outer ring 4A of the cylinder 4 so that the coaxial cable 1 is locked at a predetermined position.

With this configuration, the above-mentioned problems can be solved.

[Action]

That is, the tube 4 made of a conductive material is inserted between the braid 2 and the insulator 3, and the clamp 5 holds the coaxial cable 1 in place.
The braid 2 is sandwiched by the outer ring 4A.

Therefore, even if the clamping force at the time of clamping becomes large, it is possible to avoid applying a force to the insulator 3 and deforming it as in the conventional case, and the electric characteristics are not adversely affected.
Furthermore, the deterioration of the shield effect can be prevented, and moreover,
It is possible to reliably lock the coaxial cable.

〔Example〕

The present invention will be described in detail below with reference to FIGS. 2 and 3. FIG. 2 is an explanatory view of an embodiment according to the present invention, (a)
Is a perspective view, (b) is a side view of the cylinder, and (a) to (3) of FIG.
(H) is a terminal treatment process chart of the present invention. Throughout the drawings, the same reference numerals denote the same objects.

As shown in FIG. 2 (a), a tube 4 made of a conductive material is inserted between the insulator 3 of the coaxial cable 1 and the braid 2 that covers the outer circumference 3A of the insulator 3, and the presser plate 5A and the base are inserted. By holding the braid 2 by the clamp 5 composed of the plate 5B, the coaxial cable 1
It is designed to be locked.

The cylinder 4 has a predetermined length L, as shown in (b),
Moreover, the insulator 3 is formed to have a diameter D into which the insulator 3 can be inserted and a thickness t that can withstand an external force when sandwiched.

Therefore, even if the holding force between the holding plate 5A and the base plate 5B becomes large, the force is received by the tube 4, and the insulator 3
It is possible to prevent deformation.

Inserting the tube 4 between the braid 2 and the insulator 3 can actually be performed by the terminal treatment steps shown in FIGS. 3 (a) to (h).

First, as shown in (a), the outer sheath 6 of the end of the coaxial cable 1 to be connected to the wiring is removed by a predetermined length to expose the braid 2, and the exposed braid 2 is shown in (b). Then, the insulator 3 and the drain wire 9 are exposed by cutting and removing to a predetermined length.

Next, as shown in (c) from the cut end of the braid 2, the cylinder 4 is inserted in the direction of the arrow so as to unfold the braid 2 so that the cylinder is formed at the interface between the braid 2 and the insulator 3. 4 can be inserted as shown in (d).

After the insertion of the tube 4, as shown in (e), the shrinkable tube 8 made of an insulating material is fixed to the end of the braid 2 to prevent the tube 4 from being removed, and (f) As shown in
The core wire 7 is exposed by removing the insulator 3.

The exposed drain wire 9 and core wire 7 are covered with the insulating tube 10 as shown in (g).
Finally, as shown in (h), the contraction tube 8 is fixed so that the drain tube 9 and the insulating tube 10 covered with the core wire 7 are not removed.

Therefore, when the exposed braid 2 is clamped by performing such a terminal treatment on the coaxial cable 1, the tube 4 will not be removed and deformed, so that the braid 2 can be reliably held.
Is clamped by the outer ring 4A of the cylinder 4 and the holding plate 5A or the base plate 5B.

[Effects of the Invention] As described above, in the present invention, a tube is inserted at the interface between the braid and the insulator in the terminal treatment step of the coaxial cable,
When the clamps are clamped, the braid can be clamped by the cylinder and the clamps, and reliable locking can be performed.

Therefore, it is possible to prevent the conventional clamp from not being reliably clamped due to the deformation of the insulator, it is possible to prevent the deterioration of the electrical characteristics and the shield effect, and the practical effect is great.

[Brief description of drawings]

1 is an explanatory view of the principle of the present invention, FIG. 2 is an explanatory view of an embodiment according to the present invention, (a) is a perspective view, (b) is a side view of a cylinder, and (a) to (a) of FIG. (H) is a terminal processing step diagram of the present invention. Fig. 4 is a conventional perspective view, (a), (b) and (c) of Fig. 5 are conventional terminal processing steps of a coaxial cable, and Fig. 6 is a coaxial cable. 2A is a plan view and FIG. 6B is a side view. In the figure, 1 is a coaxial cable, 2 is a braid, 3 is an insulator, 4 is a cylinder, 5 is a clamp, 3A is an outer circumference, and 4A is an outer ring.

Claims (1)

[Claims] 1. A coaxial cable (1) having a braid (2) covering an outer circumference (3A) of an insulator (3), a cylinder (4) of a predetermined length made of a conductive material, and the braid (2). And a clamp (5) for holding the cylinder (4), the cylinder (4) is inserted between the braid (2) and the insulator (3), and the braid (2) includes the clamp (5) and the cylinder. A cable clamp structure characterized in that the coaxial cable (1) is held at a predetermined position by being sandwiched by the outer ring (4A) of (4).