JPH0719090Y2 - Terminal board cable holding structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a terminal plate for connecting a communication cable such as a telephone line, and more specifically, it is provided with a substantially U-shaped core wire connecting groove. The present invention relates to a cable holding structure for a terminal plate that can be connected without removing the cable.

[Conventional technology]

A conventional terminal plate includes a slit terminal having a substantially U-shaped core wire connecting groove for connecting a core wire of a cable and a cable guide portion having a substantially U-shaped guide groove for guiding the cable, and the slit terminal. The cable guide portion is installed in the axial direction of the cable connected to. When the cable is press-fitted into the core wire connection groove of the slit terminal, the coating of the cable is broken and pressed by the core wire connection groove, so that the cable and the slit terminal can be connected without removing the coating of the cable.

A conventional cable holding structure for a terminal board is composed of a cable guide portion formed of metal, synthetic resin or the like. Then, by pushing a cable having a shape larger than the spacing between the guide grooves into this guide groove, the cable is clamped in the guide groove by the frictional force between the cable and the guide groove or the restoring force due to the deformation of the cable or the guide groove. There is. Even if a tensile force is applied to the cable, the guide groove holds the cable, so that it is difficult to apply a force to the connecting portion between the slit terminal and the core wire. In this way, the cable holding structure ensures the reliability of the connection between the slit terminal and the core wire.

[Problems to be solved by the device]

By the way, in the conventional cable holding structure for the terminal plate, the cable is clamped by the distance between the guide grooves. Therefore, in order to obtain the clamping force, the distance between the guide grooves must be sufficiently smaller than the diameter of the cable. There wasn't. Therefore, the cable was forced to be pushed into the guide groove, and the cable guide portion was sometimes bent or bent.

In addition, when the cable is pushed into the guide groove, since the area where the cable rubs against the guide groove is large from the start of pushing until it is held, the coating of the cable may be damaged.

Further, since the inner wall surface of the guide groove has a substantially flat surface, when the cable is pulled in the axial direction, the coating expands and the diameter becomes thin, and there are cases where the cable is not retained because it is not caught.

On the other hand, Japanese Utility Model Application Laid-Open No. 63-77266 and Japanese Utility Model Application Laid-Open No. 62-123068 disclose a structure in which a guide groove of a cable guide portion is provided with a protrusion so that the cable is held in pressure contact with the protrusion.

However, in the former case, the projection is held at three points on the upper side of the guide groove and the bottom portion of the guide groove, and the projections on both upper sides are provided on the holding arm protruding from both sides of the guide groove to the center. Therefore, when the cable is held, the holding arm may be largely pushed open by the cable to both sides, and the holding arm may be broken or the elasticity may be reduced, and the holding force of the cable may be reduced.

Further, in the latter case, since the projections are protruded in the axial direction of the cable from both sides of the guide groove so as to cross each other, there is a problem that the cable is bent and held, and the cable core wire is easily damaged.

Therefore, the present invention was devised to solve the above-mentioned problems, and when the cable is held in the cable guide portion, the cable guide portion or the cable can be prevented from being damaged, and further, the cable can be pulled in the axial direction. The main object of the present invention is to provide a cable holding structure for a terminal plate, which has improved holding strength and facilitates cable mounting.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, a cable holding structure for a terminal board according to the present invention has a cable lead-in side and a terminal side sandwiching a slit terminal having a substantially U-shaped core wire connecting groove for connecting the core wires of the cable. Cable guides each having a substantially U-shaped guide groove formed therein, and on both sides near the bottom of the inner wall surface of these guide grooves, a push-in guide surface and an inner wall surface that are inclined and project downward from the inner wall surface. A pair of protrusions having a cable holding surface projecting from the side portion to the central portion of the cable are provided facing each other, and the cable holding surface of the protruding portion of the cable guide portion on the retracting side is the cable holding portion of the protrusion of the cable guide portion on the terminal side It is formed to be longer than the surface in the axial direction of the cable.

[Action]

In the cable holding structure for a terminal plate according to the present invention, the core wire of the cable is connected to the substantially U-shaped core wire connection groove of the slit terminal, and the cable guide portion on the lead-in side and the cable on the terminal side installed with the slit terminal interposed therebetween. The lead-in side and the terminal side of the cable are guided in substantially U-shaped guide grooves formed respectively in the guide portion, and by a pair of projections that are opposed and protrude from both sides near the bottom of the inner wall surface of each guide groove. The cable is retained.

A push-in guide surface is formed on the upper part of each projection so as to incline downward from the inner wall surface of the guide groove, and the cable pushed in from above by the push-in guide surface is formed below the cable holding surface. Is inserted into.

The cable holding surface is formed so as to project from the side portion of the inner wall surface to the central portion, and prevents the cable from being loosened when the cable is pulled in the axial direction.

The cable holding surface of the protrusion on the lead-in side of the cable is formed longer in the cable axial direction than that on the terminal side, and protects the connecting portion between the cable core wire and the slit terminal from a tensile force applied to the cable from the outside.

On the other hand, the projection on the cable end side fixes the cable end side by the cable holding surface.

〔Example〕

1 to 3 show an embodiment of a cable holding structure for a terminal board according to the present invention. FIG. 1 is a partially cutaway perspective view of the same, FIG. 2 is a side view of the same, and FIG. Is a plan view of the same.

The terminal board 10 is a core wire connecting groove for connecting the core wire 12 of the cable 11.
A slit terminal 14 having 13 and a cable guide portion 16A for guiding the lead-in side 11A of the cable 11 and a cable guide portion 16B for guiding the terminal side 11B of the cable 11 are provided on both sides sandwiching the slit terminal 14.

These cable guide portions 16A and 16B are formed of an insulating material such as synthetic resin, and have substantially U-shaped guide grooves 15A and 15B, respectively.
have.

A pair of protrusions 20A, 20A for holding the cable retracting side 11A are provided on both sides of the inner wall surface 17A of the retracting side guide groove 15A in the vicinity of the bottom portion 18A so as to face each other.
A pair of protrusions 20B, 20B are provided facing each other on both sides in the vicinity of the bottom portion 18A of 7A to form a cable holding structure for the terminal board 10.

Push-in guide surfaces 21A, 21B on which the inner wall surfaces 17A, 17B are projected to incline downward, respectively, above the projections 20A, 20B.
Are formed.

The cable holding surfaces 22A and 22B of the protrusions 20A and 20B are formed so as to project from the side portions 23A and 23B of the inner wall surfaces 17A and 17B to the central portions 24A and 24B.

The length of the cable holding surface 22A of the protrusion 20A in the axial direction of the cable 11 is longer than that of the cable holding surface 22B of the protrusion 20B.

The slit terminal 14 is formed of a conductor such as metal and has a core wire connecting groove 13 having a substantially U shape. When the cable 11 is press-fitted into the core wire connecting groove 13, the interval between the core wire connecting grooves 13 becomes 12
Since the diameter of the core 11 is smaller than the diameter of the core 11, the coating of the cable 11 is broken and the core wire 12 is pressed into contact with the core wire connecting groove 13, and the slit terminal 14 and the core wire 12 are electrically connected.

To connect the cable 11 to the terminal board 10, first
11 from above the terminal board 10 to the core connecting groove 13 and the guide groove 15.
Push it into A, 15B. This allows the slit terminal 14 and the core wire to be
The electrical connection with 12 is obtained, and the retracting side 11A and the terminal side 11B of the cable 11 are the protrusions 20A and 20B on the inner wall surfaces 17A and 17B of the retracting side guide groove 15A and the terminal side guide groove 15B.
Held by each.

At this time, since the cable 11 is clamped between the opposing protrusions 20A and 20B, in order to obtain the clamping force, the opposing protrusion 20
It suffices to reduce the distance between A, 20A or 20B, 20B, and it is not necessary to reduce the distance between the guide grooves 15A, 15B with respect to the diameter of the cable 11. Therefore, the guide groove 15 is not forcibly opened, and the force holding the cable 11 is concentrated on the bottoms of the protrusions 20A, 20B, that is, the guide grooves 15A, 15B, so that the bending moment for opening these guide grooves 15A, 15B is Get smaller.

When pushing the cable 11 into the guide grooves 15A, 15B, the cable 11 must be retained from the start of pushing until it is held.
It does not rub strongly against 7B, and the cable 11
When reaching the push-in guide surfaces 21A and 21B at the upper portions of A and 20B, they are guided by these surfaces and pushed into the cable holding surfaces 22A and 22B.

The cable holding surfaces 22A, 22B of the protrusions 20A, 20B are formed to project from the side portions 23A, 23B of the inner wall surfaces 17A, 17B to the central portions 24A, 24B, and the pushed cable 11 is
As shown by the chain double-dashed line 30 in the figure, the retracted side 11A of the cable 11
When a tensile force or the like is applied to the cable holding surface 22A of the protrusion 20A, a force is prevented from being applied to the connecting portion between the slit terminal 14 and the core wire 12.

In addition, the holding surface 22B of the protrusion 20B on the terminal side causes the cable 11
The terminal side 11B of is fixed.

Then, as shown in the figure, the terminal 11B of the cable 11 is cut into a desired length, and the wiring is completed.

Although the example in which the protrusions 20A and 20B have a substantially semi-cylindrical shape is shown, the present invention is not limited to this, and other side portions 23A and 23B of the inner wall surfaces 17A and 17B project to the central portions 24A and 24B. It may be formed in a shape.

[Effect of device]

As described above, according to the cable holding structure for a terminal plate of the present invention, a pair of protrusions facing each other is provided near the bottom of the inner wall surface of the guide groove formed in the cable guide portion, and the cable is attached to this protrusion. Since the guide grooves are held, it is possible to increase the distance between the guide grooves, and it is possible to prevent the guide grooves from being forcibly opened when the cable is pushed in, and it is possible to prevent damage to the cable guide portion.

Also, when the cable is pushed into the guide groove, the cable does not rub against the guide groove from the start of pushing until it is held, and it rubs against only a small area of the protrusion.
Cable damage is prevented.

Further, since the push-in guide surface is formed on the upper portion of the projection so as to project downward from the inner wall surface, the push-in guide surface can be easily pushed in.

In addition, the projection has a cable holding surface protruding from the side of the inner wall surface to the center, and the length of the cable holding surface on the retracting side in the axial direction of the cable is longer than the length of the cable holding surface on the terminal side. Since the cable is formed, the pull-in side of the cable, which is likely to receive a pulling force from the outside, is strongly held, and even if the pull-in side of the cable is pulled, the pulling force is not applied to the connection portion between the slit terminal and the cable core wire.

Also, since the pulling force that acts on the cable is received at the cable pull-in side, the projection on the terminal side fixes the cable terminal with a holding force that prevents the cable core wire from coming out of the slit terminal core wire connection groove. As long as possible, as a result, the length of the cable holding surface of the projection on the terminal side can be shortened as much as possible to reduce the waste of the cable terminal length that is extended from the slit terminal first.

[Brief description of drawings]

1 to 3 show an embodiment of a cable holding structure for a terminal board according to the present invention. FIG. 1 is a perspective view thereof, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof. . 10 ... Terminal board, 11 ... Cable, 11A ... Cable entry side, 1
1B ... end of cable, 12 ... core of cable, 13 ... core connecting groove, 14 ... slit terminal, 15A, 15B ... guide groove, 16A, 1
6B ... Cable guide part 17A, 17B ... Inner wall surface of guide groove 18A, 18B ... Bottom part of guide groove 20A, 20B ... Protrusion 21A, 21B ... Push-in guide surface 22A, 22B ... Cable holding surface 23A, 23B ... Side part of guide surface 24A, 24B ... Central part of the guideway

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasutaka Imori 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Takeshi Aoki 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo No. Nihon Telegraph and Telephone Corporation (72) Inventor Kosuke Hioki 4-15-9 Nakano, Nakano-ku, Tokyo Sanwa Denki Kogyo Co., Ltd. (56) Bibliography 63-77266 (JP, U) Actual Development Sho 62-123068 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A lead-in side (11A) and a terminal side (11A) of a cable (11) sandwiching a slit terminal (14) having a substantially U-shaped core connecting groove (13) for connecting the cores of the cable (11). 11B) and cable guide parts (16A) and (16B), which have substantially U-shaped guide grooves (15A) and (15B) respectively, are installed. The inner wall surfaces of these guide grooves (15A) and (15B) (17A), (1
7B) on both sides near the bottom (18A) and (18B), inner wall surfaces (17A), pushing guide surfaces (21A), (21B) and inner wall surfaces (17A) that incline downward from the inner wall surfaces (17A). , A pair of protrusions (20A), (20B) having side portions (23A) of (17B), cable holding surfaces (22A), (22B) protruding from the central portions (24A), (24B) from (23B). And the cable holding surface (22A) of the projection (20A) of the cable guide section (16A) on the retract side is the cable holding surface (22B) of the projection (20B) of the cable guide section (16B) on the terminal side. ) Than cable (11)
A cable holding structure for a terminal plate, characterized in that the cable holding structure is formed to be long in the axial direction.