JPH0620529A - Flexible cable - Google Patents

Abstract

PURPOSE:To provide a flexible cable with enhanced flexibility without increasing manufacturing cost. CONSTITUTION:A tape layer is provided outside of a cable core 1, in which a plurality of insulated electric wires are collected, and a protecting cover 3 is provided outside of the tape layer in a flexible cable. Perforations 4 are provided in a tape 2, which forms the tape layer, along its entire length in its longitudinal direction, or perforations 4, each length of which is narrower than the width of the tape 2, are provided the predetermined spacing approximately perpendicular to its longitudinal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible cable, and more particularly to a cable having improved flexibility which is used for external connection between electronic and electrical equipment.

[0002]

2. Description of the Related Art In recent years, with the downsizing of electronic / electrical devices, it has been required to thin a cable between multi-core cables for connecting devices, and to enable wiring in a narrow space.
Flexibility is also required more strictly than ever before. Usually, when manufacturing this type of flexible cable, the tape layer for bundling the cable cores, which is a collection of multiple insulated core wires, is wrapped tightly so that each core wire does not come apart for that purpose. , Is one of the factors that hinder the flexibility of finished products. Therefore, as a means for solving this problem, a method of narrowing the width of the tape forming the tape layer is used.

[0003]

However, when the width of the tape forming the tape layer is narrowed as described above, the number of windings of the tape wound per unit length of the cable increases, the manufacturing speed decreases, and the manufacturing cost increases. There was a problem of doing.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a flexible cable which solves the above-mentioned problems, in which a tape layer is formed on the outside of a cable core formed by assembling a plurality of insulated electric wires, and the tape layer In a flexible cable having a protective coating on the outside of the tape, the tape forming the tape layer is provided with perforations over the entire length in the longitudinal direction, or
It is characterized in that perforations having a length narrower than the width of the tape are provided at predetermined intervals in a direction substantially perpendicular to the longitudinal direction.

[0005]

As described above, when the tape layer is formed by the tape provided with the perforations, the tape layer easily expands and contracts, and the flexibility of the flexible cable is improved. In addition, when providing perforations in a direction substantially perpendicular to the tape longitudinal direction,
The reason why the length is made narrower than the width of the tape is to prevent the tape from being cut by a force in the longitudinal direction.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view of an embodiment of a flexible cable according to the present invention. In the figure, 1 is a cable core with an outer diameter of 8 mm formed by twisting multi-core insulated wires, and 2 is a width of 20 m.
The m paper tape 3 is a protective coating made of polyethylene or polyvinyl chloride. In this embodiment, a paper tape 2 is wound around the cable core 1 with a quarter wrap, and a protective coating 3 is extruded as an outermost layer. The paper tape 2 has perforations 4 at the center thereof, with 5 mm long cuts provided at intervals of 2 mm in the longitudinal direction. This paper tape 2 does not easily break during the tape winding process, and when the finished product is bent as shown in FIG. is doing. Therefore, this cable is easily bendable and its flexibility is improved. FIG. 3 is a front view of another embodiment of the tape used in the flexible cable according to the present invention. The tape 12 is provided with perforations 14 at predetermined intervals in a direction substantially perpendicular to the longitudinal direction of the tape 12. Such a tape is vertically attached to the cable core to form a tape layer, and if necessary, a press cord is wound and then a protective coating is applied. In addition, this tape 12
In the case of, if the perforation 14 is provided to fill the width of the tape 12,
Since it is easy to cut when attached vertically, it is advisable to insert perforations with a length of 50 to 80% of the tape width. Also in this case, when the cable is bent, the perforations 14 tear and form a tear. Therefore, the flexibility of the cable is improved due to the formation of the split.

[0007]

As described above, according to the present invention, a flexible cable in which a tape layer is provided on the outside of a cable core formed by assembling a plurality of insulated electric wires and a protective coating is provided on the outside of the tape layer. In the tape forming the tape layer, perforations are provided over the entire length in the longitudinal direction, or perforations having a length narrower than the width of the tape are provided at predetermined intervals in a direction substantially perpendicular to the longitudinal direction. Therefore, when the cable is bent, the perforations are torn and the cable is easily bent. Therefore, there is an excellent effect that the flexibility of the cable can be improved without increasing the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a flexible cable according to the present invention.

FIG. 2 is a side view of the flexible cable of the above embodiment in a bent state.

FIG. 3 is a front view of another embodiment of the tape used in the flexible cable of the present invention.

[Explanation of symbols]

 1 Cable core 2, 12 Tape 3 Protective coating 4, 14 Perforation 5 Cut

Claims (1)

[Claims] 1. A flexible cable in which a tape layer is provided on the outside of a cable core formed by assembling a plurality of insulated electric wires, and a protective coating is provided on the outside of the tape layer, wherein the tape forming the tape layer is A flexible cable characterized in that perforations are provided over the entire length in the longitudinal direction, or perforations having a length narrower than the width of the tape are provided at predetermined intervals in a direction substantially perpendicular to the longitudinal direction. .