JPH10269856A - Flat cable capable of being soldered - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat cable which enables the terminal end wire of a coil and the like to be directly soldered with a plurality of conductors, and can maintain each interval between the conductors. SOLUTION: A plurality of flat angle conductors 1 plated with solder or tin, are arranged in parallel at certain intervals between two insulating tapes 2 and 2, the flat angle conductors 1 at both its sides are exposed along its certain length so as to be formed into a soldering part (h). Next, the terminal end face of one insulating tape 2 and the exposed conductor faces at the side of the terminal end faces, are covered with a heat resistant film reinforcing plate 3 with a heat resistant adhesive agent 3 so as to be stuck together by a thermal press. Subsequently, a heat resistant adhesive layer 4 is provided for the heat resistant reinforcing plate surface at the opposite side of the aforesaid sticking surface so as to be formed into a flat cable 10 capable of being soldered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a flat cable (FF)
C). More specifically, the present invention relates to a flat cable to which a terminal wire of a coil for a small motor such as a CD-ROM and a floppy disk drive (FDD) can be soldered.

[0002]

2. Description of the Related Art In a flat cable, a plurality of conductors, for example, rectangular conductors are arranged in parallel at a predetermined interval between two insulating tapes, and conductors at both ends are exposed over a predetermined length to form a connection terminal. It has a provided structure, and is used for connection between printed circuit boards in various electronic devices such as computer devices. At the end, a structure provided with a reinforcing plate to facilitate connection with a connector is known.

A general flat cable will be described with reference to FIG. FIG. 5 is a longitudinal sectional view of the flat cable, wherein 1 'is a rectangular conductor, 2 and 2 are insulating tapes, and 3' is a reinforcing plate. In this flat cable 20, a plurality of rectangular conductors 1 'are arranged in parallel at regular intervals, and on both surfaces of the conductor 1', except for the connection terminal portion t, polyvinyl chloride (PVC). Insulating tapes 2 and 2 made of a resin or the like are adhered and integrated, and a polyester resin is applied so as to integrally cover one surface of the conductor 1 ′ of the connection terminal portion t and one end surface of the one insulating tape 2. A reinforcing plate 3 'made of a material such as the above is stuck. The connection between the flat cable 20 and a printed circuit board or the like is generally performed by connecting the connection terminal portion t to a connector (not shown). Conventionally, a terminal wire of a coil for a small motor such as a CD-ROM or an FDD is connected to a lead wire of an FFC or a flexible printed circuit (FPC) as a lead wire via a terminal plate.

[0004]

However, when the terminal wire of the coil is directly soldered to the conventional FFC, the high heat of the solder melts the bonding portion between the reinforcing plate and the plurality of conductors, and the interval between the conductors is reduced. There was a problem that it could not be maintained. In some cases, there is a problem that the reinforcing plate itself also melts.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and provides a flat cable which can directly solder a terminal wire of a coil to a plurality of conductors and can maintain a conductor interval. With the goal.

[0006]

According to the present invention, a plurality of conductors are arranged in parallel at a fixed interval between two insulating tapes, and a conductor at one end or both ends is fixed. A flat cable to which a reinforcing plate that covers the terminal portion surface of one of the insulating tapes and the exposed conductor surface on the terminal portion surface side is affixed, together with the soldering portion exposed over a long time, The plurality of conductors are solder-plated or tin-plated rectangular conductors, and the reinforcing plate is a heat-resistant reinforcing plate using a heat-resistant film, which is attached with a heat-resistant adhesive and opposite to the attaching surface. This is a solderable flat cable provided with a heat-resistant adhesive layer on the heat-resistant reinforcing plate surface. In addition, a conductor interval maintaining section in which a heat-resistant film is stuck with a heat-resistant adhesive may be provided at the tip of the plurality of conductors of the soldering section.

Further, according to the present invention, a plurality of conductors are arranged in parallel at a fixed interval between two insulating tapes, and one surface of one end or both ends of the conductor is exposed over a certain length to form a soldered portion. Therefore, a flat cable in which one of the insulating tapes is extended to a conductor tip, the plurality of conductors are solder-plated or tin-plated rectangular conductors, and the one of the one conductors extended to the conductor tip is The insulating tape is a heat-resistant insulating tape using a heat-resistant film, and the heat-resistant insulating tape and a plurality of conductors of a soldered portion are bonded with a heat-resistant adhesive, and an end of the heat-resistant insulating tape on a surface not in contact with the conductor. In a solderable flat cable provided with a heat-resistant adhesive layer in a portion. In addition, a conductor interval maintaining section in which a heat-resistant film is stuck with a heat-resistant adhesive may be provided at the tip of the plurality of conductors of the soldering section. As the heat-resistant film, a polyesterimide film, a polyamideimide film, a polyimide film, or the like can be used.

[0008]

In the flat cable of the present invention, the solder-plated rectangular conductor 1 is used as a plurality of conductors, so that it can be soldered well. A heat-resistant reinforcing plate 3 such as a polyimide film is used as a reinforcing plate, and a heat-resistant adhesive (not shown) is used.
As a result, heat can be applied during soldering and the conductor spacing can be maintained. Further, by providing the conductor interval maintaining portion 5 at the end of the soldered portion h, the conductor interval can be more favorably maintained. Further, since the heat-resistant reinforcing plate 3 is provided with the heat-resistant adhesive layer 4 on the surface opposite to the attachment surface, the flat cable of the present invention can be attached to a mounting plate (not shown) such as a coil.
And it can withstand the heat of soldering.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the flat cable according to the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the present embodiment. 1 to 4 are schematic views showing first to fourth embodiments of the flat cable according to the present invention. In addition,
1 is a solder plated rectangular conductor, 2 is an insulating tape, 2a is a heat resistant insulating tape, 3 is a heat resistant reinforcing plate, 4 is a heat resistant adhesive layer, 5
Denotes a conductor spacing maintaining portion, and h denotes a soldering portion.

Embodiment 1 The structure and manufacturing method of a flat cable according to a first embodiment of the present invention will be described in detail with reference to FIG. A plurality of tin-plated rectangular copper wires 1 (for example, 0.1 mm thick × 0.8 mm width), for example, 10 (only 4 are shown in the figure) were arranged in parallel at regular intervals. On both sides of the plurality of rectangular copper wires 1, a rectangular copper wire serving as a soldering portion h is exposed and PVC
The insulating tapes 2 and 2 were arranged, and the rectangular copper wire 1 and the insulating tapes 2 and 2 were adhered and integrated using a heat roller or the like (the same applies to the following description). Next, a heat-resistant adhesive is applied to cover the end of one insulating tape 2 and the exposed rectangular copper wire 1 (not shown).
The polyimide film reinforcing plate 3 was arranged, and the reinforcing plate 3 was attached by a hot press (not shown, the same applies to the following description). Next, a double-sided pressure-sensitive adhesive tape with a heat-resistant adhesive (a release paper is not shown) was stuck on the surface other than the sticking surface to provide a heat-resistant adhesive layer 4, thereby producing a solderable flat cable 10.

Embodiment 2 The structure and manufacturing method of a flat cable according to a second embodiment of the present invention will be described in detail with reference to FIG. A polyimide film reinforcing plate 3 with a heat-resistant adhesive is disposed so as to cover the end of one of the insulating tapes 2 and the tin-plated rectangular copper wire 1, and the same as in Example 1 until the reinforcing plate 3 is attached by hot pressing. did. Next, a heat-resistant adhesive (not shown) is attached to the upper ends of the plurality of rectangular copper wires 1 on the side where the reinforcing plate 3 is not disposed.
Polyimide film 5 is placed and hot pressed (not shown)
Thus, the polyimide film was adhered to form a conductor spacing maintaining section 5. Next, a heat-resistant adhesive layer 4 was provided in the same manner as in Example 1, and a solderable flat cable 10 was manufactured.

Third Embodiment The structure and manufacturing method of a flat cable according to a third embodiment of the present invention will be described in detail with reference to FIG. A plurality (for example, eight) of the solder-plated rectangular copper wires 1 (for example, 0.1 mm thick × 0.8 mm width) were arranged in parallel at regular intervals. One side of each of the plurality of rectangular copper wires 1 has a soldered portion h.
Is exposed, a PVC insulating tape 2 is arranged, and a polyesterimide insulating tape with a heat-resistant adhesive (not shown) is arranged as a heat-resistant insulating tape 2a on the entire surface on the other side, and a heat roller or the like (not shown) is used. Flat copper wire 1 and insulating tape 2,
2a were adhered and integrated, and the exposed rectangular copper wire 1 and the insulating tape 2a were adhered. Next, a heat-resistant adhesive layer 4 was provided in the same manner as in Example 1, and a solderable flat cable 10 was manufactured.

Embodiment 4 The structure and manufacturing method of a flat cable according to a fourth embodiment of the present invention will be described in detail with reference to FIG. In the same manner as in Example 3, a plurality of the solder-plated rectangular copper wires 1 and the insulating tapes 2 and 2a were adhered and integrated, and the exposed rectangular copper wire 1 and the insulating tape 2a were bonded. Next, a polyimide film 5 with a heat-resistant adhesive (not shown) was arranged on the upper end of the rectangular copper wire 1 at the soldering portion h, and the film 5 was attached by a press to form a conductor gap maintaining portion 5. Next, a heat-resistant adhesive layer 4 was provided in the same manner as in Example 1, and a solderable flat cable 10 was manufactured.

With respect to the obtained solderable flat cables of Examples 1 to 4, the terminal wire of the coil was directly soldered to the soldering portion h. However, it can withstand heat during soldering and maintain good conductor spacing. Met.

[0015]

According to the flat cable of the present invention, a solder-plated rectangular conductor is used as a plurality of conductors, so that it can be soldered well. In addition, since a heat-resistant film such as a polyimide film is used as the reinforcing plate and is attached with a heat-resistant adhesive, it can withstand heat at the time of soldering and can maintain a conductor interval. Further, the reinforcing plate is provided with a heat-resistant adhesive layer on the surface opposite to the attachment surface, so that it can be adhered and held at an appropriate position, and can withstand heat during soldering. Therefore, it is not necessary to use the terminal wire of the coil as a lead wire through the terminal plate, and the coil can be directly connected to the flat cable by soldering. Therefore, the effect of contributing to the industry such as cost reduction is extremely large.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a first embodiment of a flat cable according to the present invention. (A) is a top view. (B) is (a)
It is sectional drawing cut | disconnected by the bb part of the figure. (C) is (a)
It is sectional drawing cut | disconnected by the cc part of the figure.

FIG. 2 is a longitudinal sectional view showing a second embodiment of the flat cable according to the present invention.

FIG. 3 is a longitudinal sectional view showing a third embodiment of the flat cable according to the present invention.

FIG. 4 is a longitudinal sectional view showing a fourth embodiment of the flat cable of the present invention.

FIG. 5 is a longitudinal sectional view showing a general flat cable.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solder-plated or tin-plated rectangular conductor 2 Insulating tape 2a Heat-resistant insulating tape (heat-resistant film) 3 Heat-resistant reinforcing plate (heat-resistant film) 4 Heat-resistant adhesive layer 5 Conductor spacing maintaining part (heat-resistant film) 10 Solderable flat cable h Soldering part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kenji Kusaki 6-7-35 Kita Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation

Claims (4)

[Claims] 1. A plurality of conductors are arranged in parallel between two insulating tapes at a predetermined interval, and a conductor at one end or both ends is exposed over a predetermined length to form a soldered portion. A flat cable to which a reinforcing plate for integrally covering a terminal portion surface of an insulating tape and an exposed conductor surface on the terminal portion side is attached, wherein the plurality of conductors are plated with solder or tin. It is a rectangular conductor, and the reinforcing plate is a heat-resistant reinforcing plate using a heat-resistant film, which is attached with a heat-resistant adhesive, and a heat-resistant adhesive layer is provided on a surface of the heat-resistant reinforcing plate opposite to the attaching surface. A flat cable that can be soldered, characterized in that: 2. The solderable part according to claim 1, wherein a conductor interval maintaining part in which a heat-resistant film is adhered with a heat-resistant adhesive is provided at a tip part of the plurality of conductors of the soldering part. Flat cable. 3. A method for arranging a plurality of conductors in parallel at a fixed interval between two insulating tapes and exposing one surface of one end or both ends of the conductor over a certain length to form a soldered portion. The insulating tape is a flat cable extended to a conductor tip, the plurality of conductors are solder-plated or tin-plated rectangular conductors, and the one insulating tape extended to the conductor tip is A heat-resistant insulating tape using a heat-resistant film. The heat-resistant insulating tape and the plurality of conductors of the soldered portion are bonded with a heat-resistant adhesive, and heat-resistant is applied to the end of the heat-resistant insulating tape that is not in contact with the conductor. A solderable flat cable characterized by having an adhesive layer. 4. The solderable part according to claim 3, wherein a conductor interval maintaining part having a heat-resistant film adhered by a heat-resistant adhesive is provided at a tip end of the plurality of conductors of the soldering part. Flat cable.