JPH0419822Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a connection structure for printed circuit boards.

[Conventional technology]

FIG. 3 shows a conventional printed circuit board connection structure.

This is done by connecting the first single-sided printed circuit board 1 and the second single-sided printed circuit board 2 to their patterns 1a and 1.
Stack b facing each other and place rubber material 3 on top of it.
This is a structure in which the presser metal fittings 4 are applied via the screws 5, and these are tightened together at a plurality of locations using the screws 5 to press and connect both the patterns 1a and 1b.

In this connection structure, the patterns 1a and 1b face each other and are directly pressed and connected, which is good for connecting single-sided printed circuit boards.

[Problem that the invention attempts to solve]

However, for example, in the case of connecting single-sided printed circuit boards and double-sided printed circuit boards, it is structurally impossible to connect other patterns that are not press-connected, so there is a problem that the density of pattern connection parts cannot be increased. It was hot.

FIG. 4 shows a connection structure known to solve this problem.

In the figure, 11 is a single-sided printed circuit board, a is a first pattern, b is a second pattern, 12 is a double-sided printed circuit board, c is a third pattern, d is a fourth pattern, and 13 are both printed circuit boards. 11,12
It is a connecting member. This member 13 has a plurality of flexible contacts 15, 15' corresponding to the third and fourth patterns c and d, respectively, on the side wall of a U-shaped groove-shaped contact base 14 made of resin. 15a and 15'a are buried symmetrically toward the bottom of the contact base 14. The distance between the two end portions 15a and 15'a is determined by bending the inserted double-sided printed circuit board 12.
It is set so that a contact pressure above a certain level can be obtained by making pressure contact with both patterns c and d, respectively. Base end portions 15b, 1 of flexible contacts 15, 15'
5'b penetrates the single-sided printed circuit board 11 and is connected to the corresponding first pattern a and second pattern b by soldering.

In the case of this connection structure, if the double-sided printed circuit board 12 is inserted into the connection member 13, the flexible contacts 15, 1
5′, the first pattern a and the third pattern c and the second pattern b and the fourth pattern d
can be connected to each other. Therefore,
Compared to the connection structure shown in FIG. 2, the density of pattern connection parts can be increased. As far as this goes, the above problem can be solved.

However, in such a connection structure, when attaching and detaching the double-sided printed circuit board 12 between the flexible contacts 15 and 15', the third and fourth patterns c and d are connected to the flexible contacts 15 and 15'. Since the printed circuit board 12 is rubbed against the strong pressing force, it is difficult to attach and detach the printed circuit board 12, and depending on the manner in which the printed circuit board 12 is attached and detached, the patterns c and d may be damaged.

Further, since the connecting member 13 has a complicated shape, molding of the flexible contacts 15, 15' requires a lot of man-hours, which not only increases the cost but also increases the size. Therefore, there was a problem that the connection structure inevitably became expensive and large.

This idea was made by focusing on these conventional problems, and its purpose is to increase the density of pattern connection parts, and at the same time, to make it easy to attach and detach printed circuit boards, and to improve the pattern connection. To provide a small and inexpensive printed circuit board connection structure without fear of damage.

[Means for solving problems]

The printed circuit board mounting structure according to this invention includes a first printed circuit board, a second printed circuit board, a holding member, and a first printed circuit board and a second printed circuit board that are fastened together with the holding member to form opposing patterns. The present invention includes a fastener for press connection, and a contact member for press connection between a pattern other than the above on the first printed circuit board and a pattern other than the above on the second printed circuit board.

[Effect]

The first printed circuit board and the second printed circuit board are
Because it can be tightened with a fastener together with the presser member,
The patterns on both facing substrates are pressed by the tightening force at that time and are directly connected. on the other hand,
Patterns other than the above on the first printed circuit board and the second printed circuit board
The other patterns of the printed circuit board are connected to each other by being pressed by the contact member.

In this manner, the connection structure of the present invention enables direct press connection between patterns and press connection of patterns other than those described above using contact members, so that the density of connection parts can be increased.

In addition, the two printed circuit boards can be easily attached and detached by tightening and releasing them using a fastener, etc., and the structure is such that the patterns are connected by pressing.
Since the patterns do not rub against each other when the printed circuit board is attached or removed, there is no risk of the patterns being damaged.

Furthermore, since the flexible contact can be easily attached by embedding it in the holding member or fixing it with screws, the structure of the contact member is simple and does not require many man-hours to manufacture, making it cheaper, and the shape is compact, which is advantageous for downsizing. be.

[Example of idea]

FIG. 1 shows a first embodiment of this invention.

In the figure, 21 is a single-sided printed circuit board as the first printed circuit board, P ₁ is the first pattern,
P ₂ is a second pattern, 22 is a double-sided printed circuit board as a second printed circuit board, P ₃ is a third pattern, P ₄ is a fourth pattern, S is a flexible contact on a resin holding member 23. 24 is a contact member formed by insert molding, and 25 is a tightening screw as a fastening tool. Although not shown, the flexible contact 24 may be screwed to the presser member 23.

The printed circuit boards 21, 21 are stacked with the ends of the first pattern _P1 and the third pattern _P3 facing each other, the presser member 23 is applied to this overlapped portion, and the tightening screw 25 is the presser member. The three parts 21, 22, and 23 are joined together by inserting them into the screw holes (not shown) of 23, screwing them into the screw holes (not shown) of both the printed circuit boards 21, 22, and tightening them. are doing.

In the contact member S, when the tightening screw 25 is tightened, one end 24a of the flexible contact 24 is in pressure contact with the fourth pattern _P4 of the double-sided printed circuit board 22, and the other end 24b is in pressure contact with the fourth pattern P4 of the single-sided printed circuit board 21. It is curved and formed so as to be in pressure contact with pattern _P1 ,
Moreover, it is embedded in the holding member 23 so as to have such a positional relationship. Further, a plurality of flexible contacts 24 are provided. That is, as many patterns as the second patterns P ₂ and fourth patterns P ₄ to be connected are buried.

Because of this structure, the holding member 23 is attached to the two printed circuit boards 21 and 22 that are stacked one on top of the other.
When (contact member S) is tightened with the fitting tightening screw 25, the first pattern P ₁ and the third pattern
Not only is P ₃ directly press-connected, but also the second pattern P ₂ and the fourth pattern P ₄ are connected to the end 2, respectively.
4a and 24b are connected by flexible contacts 24 pressed together.

Therefore, compared to the conventional connection structure in which only the patterns facing each other are press-connected, the density of the connection portions of each pattern can be increased.
Further, the printed circuit boards 21 and 22 can be easily attached and detached by tightening and releasing the tightening screws 25, and there is no risk that the patterns P ₁ , P ₂ , P ₃ , and P ₄ will be damaged in the process. Because the first pattern P ₁ and the third
, between the fourth pattern P ₄ and the flexible contact ₂₄ , and between the second pattern P ₂ and the flexible contact 24 are connected by pressure by the tightening force of the tightening screw 25 . This is because the above-mentioned elements do not rub against each other strongly each time they are tightened.

Further, the holding member 23 is made of a resin plate and has a simple shape, and the contact member S can be easily attached by insert molding the flexible contact 24 into the resin plate, so it is inexpensive and compact. be able to. Therefore, the connection structure as a whole becomes less expensive and smaller.

In the first embodiment, one pressing member 23 is
Although this is an example in which the pressing members are used both for pressing the second printed circuit boards 21 and 22 and for pressing the flexible contact 24, it is also possible to use separate pressing members for each of the pressing operations.

The second embodiment shown in FIG. 2 is one example.

In the figure, the same reference numerals as in FIG. 1 indicate the same parts. 31 is a first holding member, 32 is a tightening screw,
S ₁ is a contact member in which a flexible contact 34 is insert-molded in the second holding member 33, and 35 is a tightening screw.

With this configuration, when the first holding member 31 is applied to the two stacked printed circuit boards 21 and 22 and tightened with the tightening screws 32, both the first and third patterns P ₁ and P ₃ are formed. are connected directly by pressing. On the other hand, the contact member _S1 is placed on the first printed circuit board 21, and one end of the flexible contact 34 is brought into contact with the second pattern _P2 , and the other end is brought into contact with the fourth pattern _P4 of the second printed circuit board 22. and tighten screw 35
When tightened, both the second and fourth patterns P ₂ ,
P ₄ is press-connected by the flexible contact 34 mentioned above.
The effect obtained is essentially the same as that of the first embodiment.

[Effect of idea]

As explained above, according to this invention, since the structure is as described above, the density of the connection parts of the pattern can be increased, and at the same time, the printed circuit board can be easily attached and detached, and there is no risk of damage to the pattern. , and a small and inexpensive printed circuit board connection structure can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main parts of the first embodiment of this invention.
FIG. 2 is a sectional view of the main part of the second embodiment, FIG. 3 is a side view of the conventional example, and FIG. 4 is a sectional view of the main part of another conventional example. In the figure, 21 is a single-sided printed circuit board as a first printed circuit board, 22 is a double-sided printed circuit board as a second printed circuit board, P ₁ is a first pattern, and P ₂
is the second pattern, P ₃ is the third pattern, P ₄ is the fourth pattern, 23, 31, 33 are the pressing members,
24, 34 are flexible contacts, S, S ₁ are contact members, 2
5, 32, and 35 are tightening screws.

Claims (1)

[Scope of utility model registration request] a first printed circuit board, a second printed circuit board, a holding member, a fastener that clamps the first printed circuit board and the second printed circuit board together with the holding member to press connect the opposing patterns; 1. A connection structure for a printed circuit board, comprising a contact member for press-connecting a pattern other than the above on a printed circuit board and a pattern other than the above on a second printed circuit board.