JPH0545837U - Flat cable with shield - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is a flat cable with a shield for controlling the electromagnetic wave with a simple operation even for the accessories connected to the flat cable in the influence of the electromagnetic wave on the flat cable. It provides a cable. According to the present invention, an electromagnetic wave shielding composite tape is provided on the upper surface of a flat cable so as to be in close contact with each other by providing free protruding portions from both ends of the cable.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a shielded flat cable for shielding electromagnetic waves.

[0002]

[Prior Art]

 Generally, a flat cable used for internal wiring of electronic and electric equipment has a plurality of conductors 2, 2 ', 2 "arranged in parallel on the same plane at desired intervals as shown in FIG. The insulating layer 3 is sandwiched between insulating films to provide an insulating layer 3 and integrated.

Therefore, in the above wiring, when the flat cable is easily affected by electromagnetic waves or easily radiated electromagnetic waves, in order to prevent this, as shown in FIG. 2 and FIG. 1. A shielding composite tape 4 having a structure in which an electromagnetic shielding metal layer, for example, a foil 5 of copper, aluminum, iron or the like is sandwiched between an insulating adhesive layer 6 and a shielding insulating layer 7 is arranged on the upper surface of 1 and is shielded by being adhered thereto. This is the flat cable 8.

However, in the thus-configured shielded flat cable 8, the upper surface of the flat cable 1 is covered with the shielding composite tape 4, but the reason why the insulating adhesive layer is provided in this shielding composite tape is flat. This is because the workability of mounting the cable can be easily achieved, and by making the cable electrically insulative, it does not cause a ground fault even if it comes into contact with the conductor of the flat cable. In addition, the reason why the shielding insulating layer made of an insulating film is provided on the surface of the shielding composite tape is that the shielding metal layer does not come into contact with the foot of another device and cause a ground fault.

However, even if the shielded flat cable 8 is formed in this way, when the flat cable 8 is internally wired as described above, when the connector 9 is attached to the end of the flat cable 8 as shown in FIG. Since only the flat cable 8 is protected by electromagnetic waves and the connector 9 is exposed, there is a problem that the connector 9 is easily affected by the electromagnetic wave or emits the electromagnetic wave from the connector. It was

In the figure, 10 is a print substrate.

In order to solve this problem, a connector provided with a tape similar to the shielding composite tape provided on the upper surface of the flat cable in order to protect the electromagnetic wave from the connector 9 may be used. However, in order to newly install the shielding composite tape, the cost becomes remarkably high and the work becomes complicated, which hinders the workability.

[0008]

[Problems to be solved by the device]

 As a result of earnest research in view of the present situation, the present invention effectively uses the shield composite tape provided on the upper surface of the flat cable, and the shield composite tape alone is used to electromagnetically affect the flat cable portion as well as the connector portion. This is the development of a shielded flat cable designed to shield the damage caused by

[0009]

[Means for Solving the Problems]

 The present invention is a single-sided flat cable in which a plurality of conductors are arranged in parallel on the same plane along the longitudinal direction at desired intervals, and an insulating layer is provided on both sides of the conductor with the end portions of the conductors exposed to the desired length. A shielding composite tape having an electromagnetic wave shielding metal layer as an intermediate layer on the insulating layer is arranged and adhered so as to protrude from both ends of the flat cable by a desired length and to be peeled off. To do.

[0010]

[Action]

 The shielded flat cable of the present invention is placed on one side of the flat cable 1 as shown in FIGS. 5 and 6, and the shielded composite tape 11 is in close contact with the flat cable for a predetermined length, and the flat cable is projected and peeled off. Therefore, when the flat cable 1 is used, when the connector 9 is connected to the end conductor of the flat cable 1 as shown in FIG. Since the upper surface of the connector 9 can be easily covered, it is possible to obtain the shielded flat cable 12 capable of sufficiently protecting the connector from the influence of electromagnetic waves.

The shielding composite tape 11 is projected from the end of the flat cable as described above and is peeled off. The length of the protruding and peeling shielding composite tape is as follows. This cannot be limited because it depends on the shape of the device attached to the end of the flat cable, for example, the connector, and the point is that the protrusion of a length sufficient to cover the surface of the device with the shielding composite tape. It suffices to provide a portion, which is normally 10 to 15 mm, and it can be arranged by projecting and peeling it at both ends of the flat cable at both ends.

Further, in order to effectively exhibit the shielding against electromagnetic waves in the shielded flat cable 12 of the present invention, it is most preferable to ground the shielding metal layer of the shielding composite tape. The grounding method is to the conductor of the flat cable grounding. The connection may be performed or the lead wire may be pulled out from the shielding metal layer and directly dropped to the ground of the printed circuit board.

[0013]

【Example】

 As shown in FIG. 1, a plurality of conductors 2, 2 ′ and 2 ″ are arranged side by side at a desired interval along the longitudinal direction on one plane, and an insulating layer 3 made of polyethylene film is provided on both sides to integrally form As shown in FIG. 6, an insulating adhesive layer 7 is provided on one side of the shielding metal layer 6 made of copper foil on the upper surface of the flat cable 1 having a total length of 110 mm and a conductor exposed length of 5 mm, and a shielding insulating layer 11 made of polyethylene film is provided on the other side. The shielded composite tape having a length of 140 mm provided was projected in a state where it was peeled off from both ends of the flat cable by 15 mm, and the flat cable was shielded by leaving the projecting portions to obtain the flat cable 12 of the present invention. ..

The thus-obtained shielded flat cable 12 according to the present invention is arranged and adhered so as to cover the protruding portion of the shield composite tape 11 as it is on the upper surface of the connector 9 as shown in FIG. The connector can be protected from electromagnetic waves at a low cost as well as a simple operation.

[0015]

[Effect of the device]

 According to the shielded flat cable of the present invention, the flat cable can be easily protected from electromagnetic waves, and at the same time, the accessories connected to the flat cable can be easily workable and cost-effective to prevent the influence from electromagnetic waves. It is industrially useful.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a flat cable.

FIG. 2 is a cross-sectional view of a conventional shield composite tape.

FIG. 3 is a cross-sectional view of a conventional shielded flat cable.

FIG. 4 is a perspective view showing a state in which a connector is attached to an end of a conventional shielded flat cable.

FIG. 5 is a perspective view of the shielded flat cable of the present invention.

FIG. 6 is a sectional view of a flat cable with a shield according to the present invention.

FIG. 7 is a perspective view showing a state where a connector is attached to an end portion of the flat cable with a shield of the present invention.

[Explanation of symbols]

1 ... Flat cable, 2, 2 ', 2''... Conductor, 3 ...
Insulating layer, 4 ... Conventional shielding composite tape, 5 ... Foil, 6
... Insulating adhesive layer, 7 ... Shielding insulating layer, 8 ... Conventional flat cable with shield, 9 ... Connector, 10 ... Printed board,
11 ... Shielding composite tape according to the present invention, 12 ... Flat cable with shielding according to the present invention.

Claims (1)

[Scope of utility model registration request] 1. A flat cable in which a plurality of conductors are arranged in parallel on the same plane along a longitudinal direction at desired intervals, and insulating layers are provided on both sides of the conductors so that end portions of the conductors are exposed for a desired length. On one side of the insulating layer, a shielding composite tape having an electromagnetic wave shielding metal layer as an intermediate layer is projected from both ends of the flat cable by a desired length, and arranged and adhered so as to be peeled off. A flat cable with a shield.