JP2537657Y2 - Flexible PCB mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible board mounting structure in which a plurality of flexible boards can be stacked together in a state where a pattern wiring portion and the like on the opposite surface are in good conduction.

[0002]

2. Description of the Related Art For example, in the case of performing internal wiring in a camera, a tape recorder, or the like, a bendable flexible substrate is used, particularly in a miniaturized and limited space. Then, in this flexible substrate, for example, as shown in FIG.
In order to make the pattern wirings 101A to 101D and the like conductive by bringing the A to 100D into physical contact with each other, these substrates 100A to 100D are laminated and the press fitting 102
And these substrates 100A to 100A from above using screws 103.
A mounting structure of a flexible substrate that fixes 00D to a predetermined position of the body 104 is known. Further, in this mounting structure, the elastic body 10 formed of a columnar rubber or the like is used.
5 is disposed in a state where it is partially buried in the body 104, whereby the flexible substrates 100A to 100D
It has been devised so as to enhance the adhesion.

[0003]

By the way, in the mounting structure having such a structure, the pattern wirings 101C and 101D of the lower substrates 100C and 100D close to the expansion and contraction member 105 among the four flexible substrates are arranged in the upper part. Since the pressure contact force is stronger than that of the upper substrates 100A and 100B, the conduction state is good.
The pattern wirings 101A, 101B, etc. of 100B may cause conduction failure. Therefore, in view of the above-mentioned conventional drawbacks, the present invention can prevent a contact failure from occurring in a conductive portion such as a pattern wiring on each substrate side by applying substantially the same pressing force to each laminated flexible substrate. It is an object of the present invention to provide a mounting structure for a flexible substrate.

[0004]

That is, the present invention is a mounting structure for a flexible substrate, in which a group of substrates on which flexible substrates are laminated are pressed together from above by a pressing member and screwed to the body side to be fixed. A spacer having an elastic body for applying a pressing force to each of the flexible substrates is interposed between the substrate groups, and prior to attaching the substrate group to the body, positioning of the flexible substrates with a positioning member is performed. It is configured to do so.

[0005]

According to the present invention, a flat plate spacer provided with an elastic body is disposed between each substrate group on which flexible substrates are laminated, so that the flexible substrates of each substrate group disposed above and below the spacer are substantially equal to each other. By applying an appropriate pressing force, the portions such as the pattern wirings attached to the respective flexible substrates can be brought into good contact with the portions of the opposing flexible substrate, such as the pattern wirings, to be conductive, in good condition.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a mounting structure of a flexible substrate according to the present invention.
A spacer 3 is arranged between the first and second substrate groups 1 and 2,
It is configured to be screwed to the body 5 with the screw 6 from above via the pressure contact member 4. The first substrate group 1 is composed of two flexible substrates 11 and 12 arranged in a pair at the top and bottom, and has pattern wirings 11A and
The portion 12A (see FIG. 2) and the like are brought into contact to conduct electricity. The second substrate group 2 also has a flexible substrate 2
The pattern wirings 21A and 22A (see FIG. 2) on the surfaces facing each other are in contact with each other.
It is designed to conduct. The spacer 3 is made of a flat plate, and has a rectangular hole 3A opened substantially at the center.
The elastic body 7 is configured to be inserted into the hole 3A. The elastic body 7 is configured such that the pressing force of the pressing member 4
Of flexible printed circuit boards 11, 12,
It is made to have a substantially elastic property such as rubber and the like, and has a large insulating property and a high coefficient of friction, and is formed in a cylindrical shape.

The pressing member 4 is made of a material having a relatively high strength. The pressing member 4 is provided with a screw hole 5 formed in the body 5 so as to press the substrate groups 1 and 2 from above so as not to be displaced.
A is fixed by a screw 6. Body 5
Is provided with a pin-shaped positioning member 5B in order to position the pressure contact members 4, the first and second substrate groups 1 and 2 and the spacer 3 at predetermined positions so as not to be displaced. , 12, 21, 22 and the holes opened in the spacers 3, the positioning members 5B are inserted through the holes. Therefore, according to this embodiment, each of the flexible substrates 11, 12, 21, and 22 is screwed from above the press-contact member 4 with the screw 6.
When the spacer 3 is fixed to the body 5 and attached to the body 5, the elastic body 7 set in the hole 3A of the spacer 3 is deformed by the tightening force of the screw 6, and the flexible substrates 11, 12, 21, 22
The pressing force acts almost uniformly. As a result, the pattern wirings 11A, 12A, 21A, 22A, etc. provided on the flexible substrates 11, 12, 21, 22 all conduct without causing a contact failure.

Next, another embodiment according to the present invention will be described with reference to FIG. In the figure, the same portions are denoted by the same reference numerals, to avoid redundant description. In the mounting structure of the flexible board according to the second embodiment, the first and second board groups 1 'and 2' are divided into three flexible boards 13 to 1 respectively.
5, 23 to 25. Therefore, according to the second embodiment, the three flexible boards 13 to 15 and 23 to 25, which are the respective board groups, are each applied with a substantially uniform pressing force by the elastic body 7 set on the spacer 3. ,
As a result, the pattern wirings 13A, 14 provided on the respective opposing surfaces are formed.
A, 14B, 15A, 23A, 24A, 24B, 25A
A good conduction state can be obtained in such portions.

[0009]

As described above, according to the mounting structure of the flexible substrate according to the present invention, a flat plate spacer is interposed between the groups of substrates, and an elastic body is set on the spacer. Since substantially uniform pressing force acts on the flexible substrates of each substrate group disposed above and below the spacer, the opposing surfaces of all these flexible substrates are brought into close contact with each other, and a good conduction state is obtained. Generation can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a flexible substrate mounting structure according to the present invention.

FIG. 2 is an exploded sectional view of the mounting structure shown in FIG.

FIG. 3 is an exploded sectional view showing a second embodiment of the present invention.

FIG. 4 is an exploded sectional view showing a conventional mounting structure.

[Explanation of symbols]

 1, 1 ', 2, 2' Substrate group 11 to 15, 21 to 25 Flexible substrate 3 Spacer 4, 4 'Pressure contact member 5 Body 5B Positioning member 7 Elastic body

Claims (1)

(57) [Scope of request for utility model registration] 1. A mounting structure for a flexible board, wherein a group of boards on which flexible boards are stacked are collectively pressed by a pressing member from above and screwed and fixed to a body side, wherein a pressing force is applied to each of the flexible boards. And a spacer having an elastic body for interposing between the substrate groups, and positioning the flexible substrates with a positioning member prior to attaching the substrate group to the body. Flexible board mounting structure.