JP2969954B2 - Mounting connection structure of lamp socket to flexible flat conductor cable and method of mounting and connecting the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure and a method for mounting and connecting a lamp socket to a flexible flat conductor cable.

[0002]

2. Description of the Related Art Referring to FIGS. 2 and 7, a flexible flat conductor cable is formed by forming a circuit pattern 2 of a copper foil on an insulating base film 1 and overlaying it. After laminating the film 3, the film 3 is punched into an outer shape and manufactured. At this time, as means for forming a connection terminal at the terminal a of the circuit pattern 2, a punched hole p is previously formed in the overlay film 3 as shown by a chain line in FIG. 2, and the copper foil 2 a of the terminal a is formed with the hole p. Is exposed, and a crimp contact as shown in Japanese Patent Publication No. 57-48833 or the like is crimped and brought into contact with the copper foil 2a (see Examples).

In this cable A, there is a case where a lamp socket 6 is mounted and connected to a circuit pattern terminal. In this case, a lamp socket mounting hole 4 is formed in the terminal as shown in FIG. As shown in FIGS. 6 and 7, this mounting hole 4 must be connected to the socket terminal 6a by exposing the terminal copper foil 2a of the circuit pattern 2 therearound. For this reason, as shown in FIG. 6, the overlay film 3 must have a hole b that is larger than the mounting hole 4, and this hole b must be formed in the overlay film 3 in advance. No.

However, when the overlay film 3 is laminated, it is very difficult to position the hole b. If the hole p covers the terminal a of the circuit pattern, it can be loosened to some extent. The center of the hole b is easily displaced. If the center is displaced, the degree of exposure of both poles of the terminal copper foil 2a changes. In the worst case, the copper foil 2a of one pole is completely covered by the overlay film 3. The unevenness of the degree of exposure of both ends of the terminal copper foil 2a leads to poor contact with the socket terminal 6a, resulting in a defective product.
For this reason, conventionally, the failure rate of the cable A was high, and the reliability of mounting and connecting the lamp socket 6 was low.

When a terminal is formed on the cable terminal a by the crimp contact, it is not necessary to form a hole p in the overlay film 3, but a hole b for a socket still needs to be formed. Work equipment, such as a mold and a press machine, is required, which increases the manufacturing cost. In particular, in a case where only one courtesy lamp is attached, such as a cable for a door and a harness of an automobile, only the attachment hole b must be punched in the overlay film 3 as shown in FIG. Hole b
In order to form this, the process and equipment are required, which causes a problem in the production cost. SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to manufacture a flexible flat conductor cable having a lamp socket at a low cost and to increase the reliability of mounting and connection of the lamp socket.

[0006]

According to a first aspect of the present invention, there is provided a structure for attaching and connecting a lamp socket to a flexible flat conductor cable.
A mounting hole for the lamp socket is formed at a terminal portion of the lamp socket circuit of the circuit pattern, and a connection terminal is provided around the mounting hole.The connection terminal has a clamp piece that breaks through the cable. After that, it is folded back in an arc shape, breaks through one of the two films and contacts the copper foil of the lamp socket circuit, and the mounting hole has
The lamp socket is fitted and fixed, and the socket contact is in contact with the connection terminal.

According to the second aspect of the present invention, in a method of mounting and connecting the same, a sheet in which an insulating base film and an overlay film are bonded together with a copper foil circuit pattern interposed therebetween is used for a portion other than the circuit pattern. At the same time as punching with a mold, a mounting hole for the lamp socket is punched and formed at a terminal portion of the lamp socket circuit of the circuit pattern, and a connection terminal is attached around the mounting hole. Via a clamp tool, after piercing the sheet, folding back in an arc shape, piercing one of the two films and contacting the copper foil of the lamp socket circuit, fitting and fixing the lamp socket in the mounting hole. Thus, the socket contact is brought into contact with the connection terminal.

[0008]

According to the present invention constructed as described above, by crimping the contact terminals, the circuit pattern is led out of the copper foil onto the overlay film, and the connection terminals of the socket terminals are formed. Therefore, it is not necessary to previously form a socket mounting hole in the overlay film. In addition, since the connection terminal is electrically connected to the circuit pattern by the crimping action, the action is reliable, and the reliability of the mounting connection is high.

[0009]

This embodiment relates to a cable A for a door and harness of an automobile shown in FIG.
Has a courtesy lamp P attached. This cable A
As shown in FIGS. 1 and 2, first, a copper foil 2a is bonded to an insulating base film 1 by thermocompression bonding or the like, and then the copper foil 2
a is removed to form a circuit pattern 2, and a sheet is formed by laminating an overlay film 3 on which the holes p have been punched out in advance. At the same time as punching with a mold, the lamp mounting hole 4 is punched and formed at the end of the lamp socket circuit of the circuit pattern 2.

As shown in FIG. 3, connection terminals 5 shown in FIG. 4 are mounted around the lamp mounting holes 4 by crimping so as to correspond to both poles of the lamp socket circuit. That is, as shown in the figure, the connection terminal 5 includes a connection portion 5a located around the mounting hole 4 and three clamp pieces 5b, 5b, 5b.
c, as shown in FIG. 3, the connecting portion 5a is provided around the mounting hole 4, and as shown in FIG.
With a well-known clamp tool (not shown), the clamp pieces 5b, 5b, and 5c are bent in an arc shape after the sheet is blown from the overlay film 3 side to break through the insulating base film 1 and contact the copper foil 2a. Attach. The sheets of the clamp pieces 5b, 5b, 5c may be broken through from the insulating base film 1 side.

The lamp socket 6 shown in FIG. 5 is fitted into the mounting hole 4 to which the connection terminals 5 of the two poles are mounted and connected. By this fitting, as shown in FIG.
The socket terminal 6a is pressed against the connection terminals 5 and 5, and the circuit pattern 2 and the socket 6 are electrically connected.

Although the terminal of the pattern terminal a is formed by the hole p in the embodiment, the terminal may be formed by the above-mentioned crimp contact without forming the hole p. In this case, the crimp contact is, for example, a part on the right side of the chain line in FIG. 4 and is brought into contact with the copper foil 2a of the terminal a in the same manner as in the embodiment.

[0013]

According to the present invention, a connection portion with a socket terminal of a circuit pattern is formed by crimping a connection terminal, so that a socket mounting hole is formed in advance in an overlay film. Without having to
The productivity of the cable is improved and the cost is reduced, and the connection terminals can be crimped from either side of both films, so that the degree of freedom in cable design is improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line XX in FIG. 3 of a connection structure for attaching a lamp socket to a flexible flat conductor cable according to the present invention.

FIG. 2 is a plan view of a flexible flat conductor cable employing an embodiment.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is a perspective view of a connection terminal.

FIG. 5 is a perspective view of a lamp socket.

FIG. 6 is a plan view of a conventional lamp socket mounting portion.

7 is a cut-away side view of the lamp socket mounted state in FIG. 6;

FIG. 8 is a plan view of a conventional overlay film.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulating base film 2 Circuit pattern 2a Copper foil 3 Overlay film 4 Lamp socket mounting hole 5 Connection terminal 5a Connection part 5b, 5c Clamp piece 6 Lamp socket 6a Socket terminal A Flexible flat conductor cable P Courtesy lamp

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 9/09 H01R 23/68

Claims (2)

(57) [Claims] 1. A flexible flat conductor cable A is formed by forming a circuit pattern 2 of copper foil 2a on an insulating base film 1 and laminating an overlay film 3 thereon .
The lamp socket of the circuit pattern 2 of the cable A
A lamp socket mounting hole 4 is formed at the terminal of the circuit,
Insert the base of the lamp socket 6 into the mounting hole 4
In a connection structure for attaching a lamp socket to a flexible flat conductor cable which is fixed to the cable A by turning the lamp socket 6 , the lamp socket 6 has an arcuate socket end around its base.
Are those child 6a is provided, around the mounting hole 4
It is provided with a connection terminal 5, wherein the connecting terminals are socket terminals of the lamp socket 6
6a comes into sliding contact with the socket 6 when it is turned.
Arc-shaped connecting portion 5a to which the socket 6 is locked
Clamp pieces 5b, 5c formed continuously with the connecting portion 5a
Wherein the clamp pieces 5b and 5c are
After breaking through A , it is folded back in an arc shape, breaks through one of the films 1 and 3 and contacts the copper foil 2a of the lamp socket circuit , and the connecting portion 5a is
Along the periphery of the mounting hole 4 , the lamp socket 6 is fitted into the mounting hole 4 via a connection portion 5 a of the connection terminal 5.
And the socket terminal 6a is fixed to the connection terminal 5
A connection structure for mounting a lamp socket to a flexible flat conductor cable, wherein the lamp socket is in contact with the connection portion 5a . 2. A flexible flat conductor cable according to claim 1.
Mounting the lamp socket to the
Then, at the same time as punching out a sheet other than the circuit pattern 2 from a sheet in which the films 1 and 3 are bonded with a mold,
At the terminal of the lamp socket circuit of the circuit pattern 2 ,
The mounting hole 4 of the lamp socket 6 is formed by punching, and the connecting portion 5a of the connection terminal 5 is attached around the mounting hole 4 and the clamp pieces 5b and 5c of the connection terminal 5 are removed.
After piercing the sheet through the clamp tool,
The lamp socket 6 is folded back in an arc shape, breaks through one of the films 1 and 3 and comes into contact with the copper foil 2a of the lamp socket circuit, and the lamp socket 6 is fitted into the mounting hole 4.
Attachment of the lamp socket to the flexible flat conductor cable, wherein the socket terminal 6a is turned and fixed via the connection portion 5a of the connection terminal 5 , and the socket terminal 6a is brought into contact with the connection portion 5a of the connection terminal 5. Connection method.