JPH01135090A - Mounting structure of printed wiring board - Google Patents

Abstract

PURPOSE:To obtain a mounting structure having a small device and a wide pattern forming region by providing a rhombic interval plate, a clamping pin to be inserted in a locking state and a plurality of printed wiring boards, lapping the top of the interval plate to be inserted to a square hole, connecting both ends of the pin to the upper faces of the boards to secure the boards. CONSTITUTION:The square hole 30-2 of a printed wiring board 1-2 is connected to the top of a rhombic interval plate 20 of an upper stage, the board 1-2 is secured, and a printed wiring board 1-3 is secured through the plate 20 above the board 1-2. In this case, since the length of the hole 30-2 is provided on the other board to be smaller than the length of the square hole, the connecting amount of the top of the plate 20 to be connected in the hole 30-2 is small, the interval between the boards 1-1 and 1-2 can be easily increased as compared with those between the plate 6 and the board 1-1 and between the board 1-2 and 1-3, the interval between the boards can be regulated to a desired value by employing the plate 30, the height of a housing can be reduced, thereby reducing the device.

Description

[Detailed Description of the Invention] [Summary] Regarding the mounting structure in which a plurality of printed wiring boards are mounted in a layered manner on a housing etc., the mounting spacing components used are versatile and low cost, and the printed wiring boards can be easily mounted. The aim is to provide a mounting structure in which the devices housed in a layered manner are compact and the pattern formation area of the printed wiring board is wide. A plurality of connecting holes perpendicular to the diagonal line and penetrating the hypotenuse surface with equal pinches are formed on each side of the upper and lower vertices, and the two rhombus spacers are made perpendicular to each other, and both hypotenuse surfaces are closely connected. In order to connect the diamond-shaped spacer plates in the wrapped state, a fixing pin is inserted into each of the connection holes in a bar-like manner, and a corner of a selected length with a width equal to the thickness of the diamond-shaped spacer plates is attached. a plurality of printed wiring boards having a small number of holes (both of which are provided at two opposite corners), and the apex portion of the diamond-shaped spacer plate is wrapped and inserted into the square hole;
Both ends of the fixing pin inserted into the connection hole are engaged with the upper surface of the printed wiring board to fix the printed wiring board.

[Industrial application field]

The present invention relates to a mounting structure in which a plurality of printed wiring boards are mounted on a housing or the like in a hierarchical manner.

In electronic devices, a plurality of printed wiring boards are often mounted in a box-shaped housing in a hierarchical manner.

At this time, it is desirable to have a mounting structure that allows the casing that accommodates the printed wiring board to be made smaller.

[Conventional technology]

FIG. 3 is a side sectional view showing a conventional mounting structure, and FIG. 4 is a perspective view of essential parts of the conventional example.

In FIG. 3, reference numeral 5 denotes a box-shaped case that houses and mounts printed wiring boards in a hierarchical manner, and is made of a metal material and has an open top. In addition, after the printed wiring board is accommodated and mounted in the housing 5, M7 is attached to the opening surface.

10 is a spacer tube made of a metal material such as a hexagonal prism or a square prism, with a screw hole 11 provided at the axis of the upper end surface, and a threaded portion having the same diameter as the screw hole 11 at the axis of the lower end surface. 12 is provided so as to protrude.

1-1.1-2. L3 is a printed wiring board mounted in a hierarchical manner within the housing 5. Surface of printed wiring board (lower surface in the figure)
A mounted component 2 is mounted on each of the boards, and the maximum mounting height of the mounted component differs depending on the printed wiring board.

For example, the mounting height of the mounted component 2 mounted on the printed wiring board 1-1 is much higher than the mounting height of the mounted component 2 mounted on the other printed wiring boards 1-2, 1-3.

Furthermore, circular holes 3 are provided at the four corners of these printed wiring boards 1-1, 1-2, and 1-3, respectively, so that the threaded portions 12 of the spacer tubes 10 pass through them.

On the other hand, the bottom plate 6 of the housing 5 is also provided with a screw hole 8, at a position opposite to the circular hole 3 of the printed wiring board, into which the spacer tube 10 is screwed.

To mount a printed wiring board using the spacer tubes 10 as described above, first, the threaded portions 12 of the spacer tubes 10 are screwed into each of the screw holes 8, and the spacer tubes 10 are planted on the bottom plate 6. let

Place the printed wiring board 1-1 on the top surface of the spacer tube 10 that has been planted, with the mounting component 2 facing downward, insert the threaded part of another spacer tube into the circular hole 3, and tighten the thread of the lower spacer tube 10. screw into hole 11,
The printed wiring board 1-1 is sandwiched and fixed between the two spacer tubes 10.

Another printed wiring board 1-2 is placed on the upper surface of the upper spacer tube 10 fixed on the printed wiring board 1-1, and the printed wiring board 1-2 is fixed in the same manner as described above. Furthermore, printed wiring board 1-3 is similarly fixed above printed wiring board 1-2. Therefore, the spacer tube 10 is also fixed to the top of the uppermost printed wiring board l-3.

Since the structure is as described above, the distance between the bottom plate 6 of the housing 5 and the lowermost printed wiring board 1-1, and the distance between the printed wiring boards is a constant distance equal to the height of the spacer tube 10. Printed wiring boards are mounted in a layered manner.

Note that the distance between the top layer printed wiring board 1 - 3 and the lid 7 is slightly larger than the height of the spacer tube 10 .

[Problem that the invention seeks to solve]

On the other hand, in recent years, the space between layers has been reduced as much as possible,
There is a need to implement printed wiring boards to promote miniaturization of devices.

However, in order to meet this demand for miniaturization with the above-mentioned conventional spacing tube method, it is necessary to
It is necessary to prepare a large number of spacer tubes of different lengths, which poses the problem of poor versatility and high cost.

Further, as shown in FIG. 4, the end surface of a spacer tube 10 made of a metal material comes into contact with the periphery of the circular hole 3 of the printed wiring board. Therefore, a conductive pattern cannot be formed in an area projected onto a circular shape concentric with the circular hole 3, which has a diameter larger than the outer diameter of the spacer tube 10, and there is a risk that the pattern forming area will be reduced.

The present invention was created in view of these points, and the mounting spacing components used are versatile and low cost.
It is an object of the present invention to provide a mounting structure in which a device in which printed wiring boards are housed in a hierarchical manner is compact and the pattern formation area of the printed wiring boards is wide.

[Means for solving problems]

In order to solve the above problems, the present invention, as illustrated in FIG. A plurality of connecting holes 21 penetrating the hypotenuse surface at equal pitches perpendicular to the vertical diagonal line on each side of the apex facing the vertices.
to be drilled.

A fixing pin 2 is fitted into both connection holes 21 in a bolt-like manner in order to connect the two diamond-shaped spacing plates 20 with the two diamond-shaped spacing plates 20 vertical and their hypotenuse surfaces closely lapped.
5 will be provided.

On the other hand, square holes 30 are provided in at least two opposing corners of the printed wiring board Ll, 1-2.1-3, into which the lapped apex portions of the diamond-shaped spacing plates 20 are inserted. This square hole 30 has a length of a desired selected length and a width equal to the thickness of the rhombic spacer plate 20.

Then, the lower apex portion of the diamond-shaped spacing plate 20 is fitted into the square hole 30-0 provided in the bottom plate 6 of the housing 5, and the lower diamond-shaped spacing plate 20 is planted on the bottom plate 6. Then, the lower apex portion of the other upper rhombus spacing plate 20 is wrapped around the upper apex portion of the rhombic spacing plate 20, and the square hole 30-1 of the printed wiring board 1-1 is
Insert into. Furthermore, the connecting hole 21 with the fixed pin 25 selected
by inserting the fixing pin 25 into the printed wiring board 1-1.
Attach it to the top surface of the

This is explained in printed wiring board 1-2. The configuration is such that the printed wiring boards 1 - 1 - 2 , 1 - 3 are mounted on the housing 5 in a hierarchical manner via the diamond-shaped spacing plates 20 .

[Effect]

According to the above-mentioned means of the present invention, when the shape of the diamond-shaped spacing plate 20 is constant, the distance between the printed wiring board and the lower printed wiring board or the bottom plate 6 of the casing is equal to the length of the square hole 30. be inversely proportional. Therefore, by selecting the length of these square holes as desired, the distance between the printed wiring boards, the distance between the printed wiring boards and the bottom plate 6, and the distance between the printed wiring boards and the lid can be adjusted according to the mounting components of the printed wiring boards. The mounting height can be approached to that of . That is,
The casing that accommodates printed wiring boards in a hierarchical manner becomes smaller.

Further, even when the fixing pin 25 is made of metal, the area where the fixing pin 25 comes into contact with the surface of the printed wiring board is extremely small. Therefore, the area where a pattern cannot be formed is almost equal to the area of the square hole and is small. That is, the pattern formation area of the printed wiring board is wide.

〔Example〕

The present invention will be specifically described below with reference to the drawings. Note that the same reference numerals indicate the same objects throughout the figures.

Fig. 1 is a side sectional view of an embodiment of the present invention, and Fig. 2 is a diagram showing the main parts of an embodiment of the invention, in which (a) is a side view of a rhombic spacer plate, and (b) shows a mounted state. A partially cutaway perspective view, and (C) a perspective view of the vicinity of the square hole.

As shown in detail in FIG. 2 (al), the diamond-shaped spacing plate 20 is
It is a diamond shape with long diagonal lines in the vertical direction and is made of a metal plate or a synthetic resin plate.

A large number of connecting holes 21 are bored on each side of the upper and lower vertices of the rhombic spacer plate 20, perpendicular to the diagonal line in the up-down direction and penetrating the hypotenuse surface at equal pitches.

On the other hand, the fixing pin 25 is made of a metal material or an insulator, has a pin shape with an outer diameter that can be fitted into the connecting hole 21, and has a length that is approximately equal to the length of a diagonal line in the horizontal direction.

In Figures 1 and 2, 1-1, 1-2, 1-3
are printed wiring boards having the same external dimensions, and the printed wiring board 1-2 has a mounted component 2A that has a higher mounting height than the mounted component 2 mounted on the other printed wiring boards 1-1 and 1-3. This is implemented.

At the four corners of the printed wiring board 1-1.1-2.1-3, square holes with a width slightly larger than the thickness of the diamond-shaped spacing board 20 and a desired length are arranged. It is. The selected desired length is a length 4 such that when the printed wiring board spacing is set to a predetermined value, both diamond-shaped spacing plates are fitted with their hypotenuse surfaces closely lapped.

The mounting heights of the mounted component 2 mounted on the printed wiring board 1-1 and the printed wiring board 1-3 are almost equal, and the mounting height of the mounted component 2A mounted on the printed wiring board 1-2 is the same as that of the mounted component 2A mounted on the other printed wiring board. This height is considerably larger than the mounting height of the mounted component 2.

Therefore, the length of the square hole 30-2 provided in the printed wiring board 1-2 is the same as that of the square hole 30-1 provided in the other printed wiring board 1-1.1-3. The length is smaller than the length of the square hole 30-3.

Further, the bottom plate 6 of the housing 5 is also provided with a square hole 30-O corresponding to the square hole of the printed wiring board.

In order to mount printed wiring boards in the housing 5 in a hierarchical manner using the diamond-shaped spacing boards 20 configured as described above, first, the housing 5 is
The lower vertex portions of the diamond-shaped spacing plate 20 are fitted into the respective square holes 30-O provided in the bottom plate 6 of the base plate 6, and the fixing pins 25 are fitted into the connecting holes 21 of the apex portions protruding toward the back side of the bottom plate 6. Then, each diamond-shaped spacer plate 20 is erected perpendicularly to the bottom plate 6.

Then, the printed wiring board 1-1 is placed horizontally on the upper part of the rhombus-shaped spacing plate 20, and each square hole 30-1 is aligned with the apex of the corresponding rhombus-shaped spacing plate 20, so that the head of the mounted component 2 is placed on the bottom plate. The printed wiring board 1-1 is supported at the lowest possible position within the range of 6.

Next, the lower oblique side surface of the other rhombic spacing plate 20 to be inserted on the upper part of the printed wiring board 1-1 is wrapped so as to match the oblique side surface of the lower rhombic spacing plate 20, and then the lower rhombic spacing plate 20 is wrapped. The lower apex portion is pushed into the square hole 30-1 by a desired amount, and both hypotenuse surfaces are brought into contact with the side walls of the square hole 30-1. In this state, a connecting hole 21 that is connected to the upper surface of the printed wiring board 1-1 is selected, and a locking pin 25 is inserted into the connecting hole 21 of both diamond-shaped spacing plates 20 in a barb shape.

As a result, the upper and lower diamond-shaped spacing plates 20 are connected, and at the same time, both ends of the fixing pins 25 are engaged with the upper surface of the printed wiring board 1-1, thereby fixing the printed wiring board 1-1.

Next, the square hole 30-2 of the printed wiring board 1-2 is inserted into the upper apex of the upper diamond-shaped spacing board 20, and the above steps are repeated to fix the printed wiring board 1-2. Wiring board 1
-2 above the printed wiring board 1-2 via the diamond-shaped spacer plate 20.
Fix 3.

At this time, since the length of the square hole 30-2 provided in the printed wiring board 1-2 is smaller than the length of the square hole provided in the other printed wiring boards, a diamond shape to be inserted into the square hole 30-2 is formed. Since the amount of fitting at the apex portion of the spacing plate 20 is small, the distance between the printed wiring board 1-1 and the printed wiring board 1-2 is equal to the distance between the bottom plate 6 and the printed wiring board Ll, and the distance between the printed wiring board 1-2 and the printed wiring board 1-2. It is easy to make the distance larger than the distance from the printed wiring board 1-3. That is, printed wiring board 1
It is easy to adjust the distance to a desired large distance so that the head of the mounted component 2A mounted on the board 1-2 does not hit the lower printed wiring board 1-1.

Note that if a square hole of a constant length is drilled in the printed wiring board, the length of the square hole can be easily increased by hand using a file or the like.

As described above, by using the same-shaped diamond-shaped spacing plates 20, the spacing between the printed wiring boards can be adjusted as desired, and the height of the casing housing the printed wiring boards can be lowered. becomes small.

Also used are mounting spacing parts (diamond-shaped spacing plates).

Fixed pins) are versatile and low cost.

Furthermore, even if the fixing pin 25 is made of metal as shown in FIG. The area that cannot be formed is small and almost equal to the area of the square hole.

That is, the pattern formation area of the printed wiring board is wide.

Note that in order to mount the printed wiring boards, unlike the above, the printed wiring boards 1-1.1-2.1-3 are first mounted in a hierarchical manner using the diamond-shaped spacing plates 20 and fixing pins 25 outside the housing 5. Assemble to,
The final assembled state may be inserted into the housing 5 and the lower diamond-shaped spacing plate 20 may be fixed to the bottom plate 6.

Furthermore, unlike the illustrated example, it goes without saying that each of the printed wiring boards 1-1.1-2.1-3 may be assembled with the mounted component mounting surface facing upward.

Furthermore, the spacing between printed wiring boards is not only adjusted by the length of the square holes, but also by making the apex of the upper and lower diamond-shaped spacing plates deeper (by inserting them into the square holes). This can be adjusted depending on what you want to do.

Therefore, even if the length of the square holes is constant, it goes without saying that the spacing between the printed wiring boards can be adjusted within a certain range.

〔Effect of the invention〕

As explained above, the present invention is a printed wiring board mounting structure using diamond-shaped spacing plates when mounting printed wiring boards in a hierarchical manner, and the mounting spacing components used are versatile and low cost. This has excellent practical effects, such as a compact apparatus in which printed wiring boards are housed in a hierarchical manner and a wide pattern formation area on the printed wiring boards.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of an embodiment of the present invention, Fig. 2 is a diagram showing the main parts of an embodiment of the present invention, (a) is a side view of a rhombic spacer plate, and (b) shows the mounted state. (C) is a perspective view of the vicinity of the square hole; FIG. 3 is a side sectional view of the conventional example; and FIG. 4 is a perspective view of essential parts of the conventional example. In the figure, 1, 14.1-2.1-3 are printed wiring boards, 2.2A is a mounted component, 5 is a housing, 6 is a bottom), 10 is a spacer tube, 20 is a diamond-shaped spacer plate, 21 is a A connecting hole, 25 is a fixing pin, and 30.30-0.30-1.30-2.30-3 is a square hole. (C) ♀gun Σshow 1T Kuchifu in the example of T Mayuzumi in Kosotoro 2 Kuchiore 1 example ○side shibushun 2 Akira 3 4th mouth with ↓ supination strabismus in the case of Gokushuume

Claims (1)

[Claims] In an apparatus for mounting a plurality of printed wiring boards in a vertically hierarchical manner, a plurality of connecting holes (21) that are perpendicular to the vertical diagonal line and pass through the hypotenuse surface at equal pitches are provided at the top and bottom vertices. With the rhombic spacing plates (20) formed on each side and the two rhombic spacing plates (20) being vertical and with their hypotenuse surfaces closely lapped, the rhombic spacing plates (20) are A fixing pin (25) that is inserted into the connecting hole (21) in a bar shape in order to connect the two.
and a plurality of the printed wiring boards (1), each of which has square holes (30) of a selected length and a width equal to the thickness of the diamond-shaped spacer board (20), provided in at least two opposing corners. The fixing pin (25) is fitted into the square hole (30) by wrapping the apex portion of the diamond-shaped spacing plate (20), and inserted into the connecting hole (21).
) on the top surface of the printed wiring board (1),
A mounting structure for a printed wiring board, characterized in that the printed wiring board is fixed.