JPH0229734Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention relates to a flexible circuit board having a structure for connecting and attaching removable circuit elements.

<Prior Art> In general, as devices become smaller and lighter, flexible circuit boards are used as printed wiring boards that can be bent and installed in narrow spaces and can streamline wiring. Conventionally, when circuit elements are attached to this flexible circuit board and electrical connections are made, the connection process is mainly done by soldering, and some connections are also made using crimp connectors. was.

In this type of connection process, it is time-consuming to attach circuit elements to the circuit board, and especially when a defect occurs in a circuit element and it becomes necessary to replace it, the replacement work is extremely complicated and extremely time-consuming. It was a hassle. That is, in the case of a soldered device, when the solder of the connection portion is melted, there is a risk that the conductive pattern of the printed wiring may be peeled off or the circuit board may be damaged. Moreover, those using crimp connectors require special tools and require a long time to work.

Therefore, the electrical connection of circuit elements that are expected to be replaced to the flexible circuit board is made by utilizing the flexibility of the flexible circuit board 4 as shown in FIG. A flexible circuit board 4 having a predetermined conductive pattern 8 and a terminal leg 2 of a circuit element 1 such as an LED
They were placed so that they were facing each other. Generally, an elastic member 19 is disposed between the panel 18 and the flexible circuit board 4, and the elasticity of the elastic member 19 causes the conductive pattern 8 to press against the terminal leg 2 to establish an electrical connection.

<Problems to be solved by the invention> However, in this conventional connection structure, there are
A support member such as a panel or shear is required to support the pressure contact between the flexible circuit board and the terminal leg of the circuit element. Therefore, there was a drawback that the above-mentioned configuration could not be applied depending on the configuration of the device.

<Purpose of the invention> The purpose of this invention is to utilize the flexibility of the flexible circuit board to create a flexible circuit board that does not require soldering or crimp connectors, and does not require support members to support the flexible circuit board. The present invention provides a flexible circuit board having an electrical connection structure between a circuit board and a circuit element.

<Means for Solving the Problems> This invention was made to solve the above-mentioned drawbacks, and includes a flexible circuit board on which a conductive pattern including at least one pair of terminal portions is formed;
a circuit element having at least a pair of cut and raised pieces that are separated from the periphery of the terminal part and erected upward while remaining partially continuous with the circuit board; a circuit element having a pair of terminal legs; and positioning and holding of the terminal legs. A flexible circuit board comprising a holder member and a holding member that holds the terminal portion of the cut and raised piece and the terminal leg of the circuit element in contact with each other, and the circuit element is mounted on the circuit board. It is.

<Function> This invention is constructed as described above, and the circuit element held by the holder member is held between a pair of raised pieces that take advantage of the flexibility of the flexible circuit board. Terminal legs are arranged, and the pair of cut and raised pieces are each urged inward by a holding member.

Due to this bias, the terminal portions of the pair of cut and raised pieces are pressed into contact with the circuit element terminal portion, and electrical connection is made between the conductive pattern of the flexible circuit board and the circuit element.
Circuit elements are mounted on a flexible circuit board in a self-supporting manner.

<Example> An example of this invention will be described below with reference to FIGS. 1 and 2.

As shown in FIG. 1, a flexible circuit board 4 is installed in a substantially planar shape along a chassis 16 disposed inside a case (not shown) of the device.

In the embodiment, the flexible circuit board 4 has a copper foil laminated on a base film made of flexible polyester or polyimide, and a conductive pattern 8 is formed on this by a known method such as etching.
A predetermined circuit is constructed by forming the . This flexible circuit board 4 has a cut-out piece 5 having a terminal portion 9 formed continuously with the conductive pattern 8 at a predetermined position, and a terminal portion 10 formed in the same manner.
A cut-and-raised piece 6 having a terminal portion 9 and a terminal portion 10 is formed so as to face each other and stand upright at a predetermined interval. Furthermore, a positioning hole 7 into which a positioning projection 13 of a holder member 11 (described later) can penetrate is formed on the flexible circuit board 4 at an intermediate portion between the cut and raised pieces 5 and 6.

The holder member 11 is made of an insulating material with a predetermined shape and dimensions, and is parallel to the axial direction of the peripheral wall of the holder member 11, which is formed in a substantially cylindrical shape in the embodiment, and at the center of the holder member 11. Vertical grooves 12, 12 with a predetermined depth are formed facing each other in the direction. Furthermore, a positioning protrusion 13 is provided on the lower surface of the holder member 11 in a protruding manner. By penetrating the positioning protrusion 13 into the positioning hole 7, the circuit element 1 is positioned at a predetermined position on the flexible circuit board 4, and is also positioned at an intermediate portion between the cut and raised pieces 5 and 6. .

A circuit element 1 is mounted on the upper part of the holder member 11.
is placed, and its terminal legs 2 and 3 are in vertical grooves 12 and 12.
The wires are aligned and routed along the lines. At this time, terminal leg 2,
The outer circumferential surface of terminal leg 3 projects slightly outward from the circumferential wall of holder member 11, and the length of terminal legs 2 and 3 is formed to be approximately the same as the length of holder member 11 excluding positioning protrusion 13.

The circuit element 1 in which the holder member 11 is interposed between the terminal legs 2 and 3 has the terminal legs 2 and 3 facing the terminal parts 9 and 10 of the cut and raised pieces 5 and 6, and the holder member 11
The positioning protrusion 13 is inserted into the positioning hole 7. In addition, the chassis 16 has a positioning protrusion 13.
Hole 17 to avoid contact with the downward protrusion of
is drilled. Then, the holding member 15 is wrapped around the cut and raised pieces 5 and 6 from the outside.

This holding member 15 is made of rubber material (for example, NBR,
This is an elastic ring made of ACM, ANM) that is wrapped around the outside of the cut and raised pieces 5 and 6 to urge the cut and raised pieces 5 and 6 inward. Due to this bias, the cut and raised pieces 5,
The terminal portions 9 and 10 of 6 are in contact with the terminal legs 2 and 3, respectively, and the circuit element 1 is electrically connected in a predetermined manner.

The inward urging force applied to the terminal legs 2 and 3 is supported by the holder member 11 disposed on the pair of cut and raised pieces 5 and 6, and the circuit element 1
The installation height and installation orientation are stipulated.

In this way, a predetermined number of circuit elements 1, a predetermined number of sets of cut and raised pieces 5, 6, and a predetermined number of holder members 11
and the holding member 15 to form a flexible circuit board.

It should be noted that this invention is not limited to the configuration of the above-described embodiment, and it is of course possible to configure the invention even without a chassis attached to the cut-and-raised portion, for example. Further, the holder member may be a polygonal column, and the circuit element terminal leg may be a lead wire having a circular cross section.

Furthermore, there may be a plurality of positioning projections and a plurality of positioning holes. Further, the cross-sectional shape of the positioning protrusion and the shape of the positioning hole may be circular or polygonal, and by defining the angle at which the holder member can be inserted depending on the shape setting and forming position, it is possible to It is also possible to prevent polarity mistakes.

<Effects of the invention> As explained above, the flexible circuit board of this invention utilizes the flexibility of the flexible circuit board to hold the circuit elements held by the holder member between the pair of cut and raised pieces. Terminal legs are arranged, the pair of cut and raised pieces are urged inward by the holding member,
Since it is configured to electrically connect the flexible circuit board and the circuit element, the circuit element can be stably made to stand on its own on the flexible circuit board even in structural parts where there is no support member such as a panel or chassis. The degree of freedom in design is expanded.

Furthermore, circuit elements can be replaced without heating the flexible circuit board, the circuit board is not damaged by heating, and the work of replacing circuit elements is extremely easy.

Furthermore, even with circuit boards whose conductive patterns are formed of aluminum foil or the like and which are normally difficult to solder, the effects of this method are extremely large, such as the ability to easily electrically connect circuit elements.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a flexible circuit board according to an embodiment of this invention, FIG. 2 is an exploded perspective view of the same, and FIG. 3 is a side sectional view showing a conventional connection structure between a flexible circuit board and a circuit element. . 1... Circuit element, 2, 3... Terminal leg, 4... Flexible circuit board, 5, 6... Cut piece, 7...
Positioning hole, 8... Conductive pattern, 9, 10...
...Terminal part, 11...Holder member, 12...Vertical groove,
13... Positioning protrusion, 15... Holding member.

Claims (1)

[Claims for Utility Model Registration] 1. A flexible circuit board on which a conductive pattern including at least one pair of terminal parts is formed, and a part of the flexible circuit board that is continuous with the circuit board and is separated around the terminal part and stands upwardly. a circuit element having at least one pair of cut and raised pieces, a pair of terminal legs; a holder member that positions and holds the terminal portion; and a terminal portion of the cut and raised piece and the terminal leg of the circuit element are brought into contact with each other. What is claimed is: 1. A flexible circuit board comprising: a holding member for holding the circuit board as it is; and the circuit element is mounted on the circuit board. 2. The flexible circuit board according to claim 1, wherein the holding member is an elastic ring. 3. The flexible circuit board according to claim 1, wherein the holder member has a pair of vertical grooves. 4. Scope of the Utility Model Registration Claim, characterized in that a positioning projection is provided at the lower end of the holder member, and a positioning hole is formed between a pair of cut and raised pieces of the circuit board through which the positioning projection passes. The flexible circuit board according to item 3.