JPH0746749B2 - Circuit board pressure welding device - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to a circuit board coupling device for press-connecting a flexible circuit board or a flexible circuit board and a rigid circuit board to connect the circuits to each other.

[Background of the Invention]

Conventionally, when electrically connecting a flexible circuit board and a hard circuit board, or electrically connecting a plurality of flexible circuit boards, for example, as shown in FIG. 7, a pedestal (or a device main body is fixed). Part) 1 is provided with a groove 1a, and an elastic member 2 such as rubber is inserted into the groove 1a so that a part of the elastic member 2 protrudes to the outside, and a plurality of circuit boards 3, 4 are provided thereon.
Was used, and the circuit boards 3 and 4 were clamped with a small screw 6 through a pressing plate 5 having high rigidity so as to be pressed against each other. However, the press-contacting device having such a structure has a drawback that it requires a lot of time for screwing work and that the circuit boards cannot be connected to each other in a place where the pedestal cannot be secured. Further, when the number of connecting lands is large, the holding plate 5 becomes long, and the interval between the machine screws 6 holding this becomes large, so that the pressing force does not reach near the center of the holding plate 5, and the lands come into contact with each other. There was a risk of causing defects.

[Object of the Invention]

The present invention solves the above-mentioned drawbacks of the prior art and provides a circuit board press-contacting device which can easily and quickly connect circuits on a board in a free place without requiring a fixing part to be attached. The purpose is to provide.

[Outline of Invention]

In order to achieve the above object, the present invention provides an intermediate member having positioning means for determining a connecting position of a plurality of circuit boards,
An elastic body for closely contacting the circuit boards positioned by the intermediate member, and a clip means for sandwiching and sandwiching the plurality of circuit boards and the intermediate member. The technical point is that the body is configured so as to be doubly biased.

〔Example〕

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a perspective view showing a state where the clip member in the embodiment of FIG. 1 is removed, and FIG. 3 is a substrate pressure contact portion in the embodiment of FIG. 3 is an exploded perspective view showing the configuration of FIG.

1 to 3, a U-shaped flexible circuit board 12 is provided so as to surround the hard circuit board 11, and the flexible circuit board 12 is not shown because of the connection with the hard circuit board 11. An arm portion 12a having a land is formed. Further, the positioning hole 1 in which the two positioning protrusions 14A and 14B provided on the intermediate seat plate 13 are engaged with the upper portion of the hard circuit board 11 and the arm portion 12a of the flexible circuit board 12.
1A, 11B and 12A, 12B are provided respectively (3rd
See figure).

The intermediate seat plate 13 is formed of a plastic material, and a holding groove 16 for holding the rubber elastic body 15 having a circular cross section is provided on a surface of the intermediate seat plate 13 facing the flexible circuit board arm portion 12a. Due to the elastic force of the rubber elastic body 15, the arm portion 12a of the flexible circuit board 12 and the hard circuit board 11 are in close contact with each other on average. Further, as shown in FIG. 2, a slope 13a and a groove 13b are provided on the surface of the intermediate seat plate 13 opposite to the surface on which the holding groove 16 is provided.
The rib 13a and the groove 13b are separated by three ribs 17 arranged in a comb shape. The rib 17 is formed integrally with the slope 13a together with the positioning protrusions 14A and 14B.

Hard circuit board 11 and flexible board through intermediate seat plate 13
The clip member 18 sandwiching the arm portion 12a of 12 is made of phosphor bronze or stainless spring steel, and has a flat portion 18A in contact with the hard circuit board 11 and a cutout groove 19 into which the rib 17 of the intermediate seat plate 13 is inserted. Leaf spring-shaped elastic portion 18B having a flat surface portion 18A
And an intermediate portion 18C between the compression portion 8B and the compression portion 8B.
In addition, an inwardly bent depression portion 18a is formed at the tip of the elastic pressure portion 18B, and the depression portion 18a rides over the slope portion 13a of the intermediate seat plate 13 at the time of pressure contact with the substrate. As shown in FIG. 1, it is configured to fall into the groove portion 13b. A circuit component 20 is mounted on the hard circuit board 11, and a circuit component 21 is mounted on the flexible circuit board 12.

Since the embodiment of FIG. 1 is constructed as described above, first, the rubber elastic body 15 is inserted into the groove 16 (see FIG. 3) of the intermediate seat plate 13, and then the positioning projections 14A and 14B are made flexible. Through the positioning holes 12A and 12B provided in the arm portion 12a of the circuit board 12, and further through the positioning holes 11A and 11B of the rigid circuit board 11, the arm portion 12 of the hard circuit board 11 and the flexible circuit board 12
Make a close contact with a. As a result, the positional relationship between the arm portion 12a and the hard circuit board 11 is properly maintained. In addition, the circuit boards with a lot of mutual wiring are placed on the front and back,
By mounting the circuit components 20, 21 between the circuit boards 11, 12, the mounting efficiency can be improved.

Next, each notch groove 19 of the clip member 18 is aligned with the rib 17 of the intermediate seat plate 13 as shown in FIG. 2, and the hard circuit board 11, the arm portion 12a of the flexible circuit board 12 and the intermediate seat board 13 are integrated. Then, the clip member 18 is inserted by being pushed between the flat surface portion 18A and the elastic pressure portion 18B. As a result, the tip end depression portion 18a of the elastic pressure portion 18B of the clip member 18 is formed on the slope portion 13a of the intermediate seat plate 13.
It is pushed while riding on. At this time, the cutout groove 19 of the clip member 18 and the rib 17 of the intermediate seat plate 13 serve as a guide and are easily inserted. Furthermore, the recessed part 18a is a sloped part 18a
When you get over the groove, as shown in Fig. 1, the groove of the intermediate seat plate 13
Since it falls into 13b, the clip member 18 is prevented from coming off. Also, in this state, the clip member
Since each elastic portion 18B of 18 independently presses the intermediate seat plate 13, the applied pressure is averaged, and the arm portions of the hard circuit board 11 and the flexible circuit board 12 through the rubber elastic body 15.
Make uniform contact with 12a. As a result, both circuit boards 11,
12 Comrades can secure stable electrical contact with each other even with some vibrations.

FIG. 4 is a sectional view of a camera in which the embodiment of FIG. 1 is mounted.
Hard circuit board 11 pressure-bonded by a clip member 18
The flexible circuit board 12 and the flexible circuit board 12 are housed in the grip portion 22A of the camera body 22. In this case the clip member 18
Is not directly fixed to the camera body 22, but the rigid circuit board 11 and the flexible circuit board 12 are fixed at other suitable portions (not shown) in the grip portion 22A. In this way, the parts that electrically connect both circuit boards 11 and 12 to each other can be freely set, so if there are many wires to be mounted like a camera and space is limited, the The invention is particularly effective.

Although the rubber elastic body 15 has a circular cross section,
The shape is not limited to the circular shape, and may be formed in a rectangular sheet shape. Further, the rubber elastic body 15 has elasticity because the circuit boards 11 and 12 are uniformly adhered to each other.
It doesn't matter even if it is like a felt sheet. Furthermore, although the clip member 18 is formed entirely of a spring material, only the elastic pressure portion 18B may be formed of a spring material.

FIG. 5 is a sectional view of a second embodiment different from the embodiment of FIG. 1 in which the arm portion of the flexible circuit board shown in FIG. 1 is modified. Except for the hard circuit board and the flexible circuit board, the structure is the same as that shown in FIG. 1. Therefore, the parts other than the two boards are designated by the same reference numerals as in FIG. In FIG. 5, the rigid circuit board is a rigid double-sided printed circuit board 51 having circuit patterns on both sides. Further, the arm portion 52a of the flexible circuit board 52 is provided around the back side of the hard double-sided printed circuit board 51 as shown in the drawing. Therefore, the circuit of the flexible circuit board 52 can be connected to the circuits provided on both surfaces of the rigid circuit board 51. Further, in this case, since the outer surface of the flexible circuit board 52 on which the circuit is not printed is electrically insulated, the bent tip arm portion 52a 'of the arm portion 52a acts as an insulating spacer. Therefore, even if the clip member 18 is made of a phosphor bronze plate or a stainless spring steel plate and is an electrically good conductor, it is not necessary to take any insulation measures.

FIG. 6 is a sectional view showing a third embodiment of the present invention in which a plurality of flexible circuit boards are pressed against each other. Members having the same functions as those in FIG. 1 are designated by the same reference numerals, and detailed description of the components will be omitted. Two flexible circuit boards 61 and 62 are pressed onto the rigid circuit board 11. In this case, the hard circuit board 11, the first flexible circuit board 61, and the second flexible circuit board 62 can be electrically coupled to each other. It is also possible to further increase the number of flexible circuit boards. Needless to say, a metal plate or a plastic plate may be used in place of the hard circuit board 11 in FIG. 6 when only a plurality of flexible circuit boards are used in pressure contact.

〔The invention's effect〕

As described above, according to the present invention, the protrusions formed on the intermediate member are configured to be inserted into the positioning holes of the circuit board from one side of the circuit board, respectively. Can be connected, circuit boards can be assembled in a compact manner even in precision equipment having a complicated circuit configuration, and there is an effect that reliability is high, assembly is easy, and work time can be shortened.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a perspective view showing a state in which a clip member which is a main part of the present invention is removed in FIG. 1, and FIG. FIG. 4 is an exploded perspective view showing a structure of an intermediate seat plate portion which is a main part of the present invention, FIG. 4 is a sectional view of a camera incorporating the embodiment of FIG. 1, and FIG. 5 is a second embodiment of the present invention. FIG. 6 is a sectional view showing an example, FIG. 6 is a sectional view showing a third embodiment of the present invention, and FIG. 7 is an exploded perspective view showing a conventional technique. [Explanation of symbols for main parts] 11,51 …… Rigid circuit board (circuit board) 12,52,61,62 …… Flexible circuit board (circuit board) 13 …… Intermediate seat plate, 14A, 14B …… For positioning Protrusion (positioning means) 15 …… elastic body, 18 …… clip member (clip means)

Claims (4)

[Claims] 1. A first circuit board having a first electric connection portion on at least one end side, a second circuit board having a second electric connection portion on at least one end side, and the first and the second. A circuit board press-contacting device for electrically connecting the first and second circuit boards by pressing the electric connection parts of the first and second circuit boards together, a positioning hole formed in each of the first and second circuit boards. And a protrusion that is fitted into each of the positioning holes from one side of the first and second circuit boards, and the first and second circuit boards are joined by the fitting of the protrusion. An intermediate member for determining a coupling position of the first and second elastic members for bringing the first and second electric connection portions positioned by the intermediate member into close contact with each other, the first and second circuit boards, and the intermediate member Stack them with the elastic body and A circuit board press-contacting device including a clip means for sandwiching the first circuit board and the second circuit board on the one end side and press-contacting each other. 2. The clip means has leaf spring-like elastic pressure portions divided by cutout grooves and arranged in parallel, and a chevron portion formed at a tip of the elastic pressure portion is pressed against the intermediate member. Having a slope portion and a groove into which the chevron portion falls, and the clip means includes the first and second clip means.
When the circuit board, the intermediate member, and the elastic body are overlapped with each other and sandwiched by the one end sides of the first and second circuit boards, the chevron portion crosses over the slope portion and the drop The circuit board pressure contact device according to claim 1, wherein the circuit board pressure contact device is configured so as to fall into the groove. 3. The intermediate member is provided with a rib that engages with the cutout groove of the clip means, and the first and second circuit boards are guided by the cutout groove and the rib. The circuit board press contact device according to claim 2, wherein the circuit board press contact device is configured to be sandwiched between the clip means. 4. The first circuit board is a flexible circuit board having a circuit only on one surface thereof, and has the first electrical connection portion and a third electrical connection portion, and the second electrical circuit board has the second electrical connection portion. The circuit board is a double-sided circuit board having circuits on both sides, has the second electrical connection portion on one surface, and has a back surface substantially opposite to the second electrical connection portion on the other surface. A fourth electrical connection portion at the position, the first electrical connection portion is connected to the second electrical connection portion, and the third electrical connection portion is connected to the fourth electrical connection portion. As described above, the second circuit board is sandwiched between the first electric connection portion and the third electric connection portion of the first circuit board, and the first circuit board circuit is bent. A surface not having a groove is configured to come into contact with the clip means. Circuit board pressing device of the third term describes.