JPH04342186A - Backboard interconnection structure - Google Patents

Abstract

PURPOSE:To enhance reliability of pattern connection and simplify connecting work by holding the circumferencial areas of holes of a short-circuit board with lower end surfaces of umbrella-shaped heads and washers. CONSTITUTION:When holes 31 of a short-circuit board 30 are aligned on the connecting terminals 20 for bridging and the short-circuit board 30 is depressed, the divided umbrella-shaped heads 23 are pressed in the direction that these heads 23 come near with each other and thereby the external diameters thereof are reduced and the holes 31 are engaged with axes 22 of the connecting terminals 20. When the holes 31 have passed the umbrella-shaped heads 23, the umbrella-shaped heads 23 become wide, returning to the initial conditions. Therefore, the circumferencial areas of holes 31 are held by the lower end surfaces of the umbrella-shaped heads 23 and washers. That is, patterns 4A, 4B formed on both backboards 3A, 3B are connected via the connecting terminals and short-circuit board 30. Thereby, reliability of connection between patterns 4A, 4B can be enhanced and connecting work can be simplified.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between backboards of a printed board device in which two bagboards are mounted side by side on a shelf.

In recent years, electronic equipment has been required to be loaded with components at a high density, and as a result, a box-shaped shelf 1 with a wide width and an open front is provided as shown in FIG. A printed board device in which a large number of printed boards 2 are housed in parallel in close proximity is used.

On the other hand, a bag board carrying an array of connectors to which printed board connectors are plugged is mounted on shelf 1.
The printed boards are connected to each other via the bag board.

[0004] At this time, manufacturing a large bag board that covers the entire bottom surface of the shelf not only increases costs, but also causes the bag board to warp as it becomes larger, making it difficult to attach it to the shelf. It becomes an obstacle to wear.

[0005] For this reason, in order to avoid increasing the size of the bag board, two small bag boards 3A and 3B of standard size are arranged side by side and attached to the shelf 1, as illustrated in FIG. By the way, the pattern 4A (power pattern, signal pattern, etc.) formed on the bag board 3A is the same as the pattern 4B (power pattern, signal pattern, etc.) formed on the bag board 3B.
signal pattern, etc.).

[0006]

2. Description of the Related Art FIG. 4 is a diagram of a conventional example showing a connection structure between backboards, in which (A) is a sectional view and (B) is a perspective view.

In the figure, the bag board of the shelf 1 is composed of a bag board 3A and a bag board 3B, and a pattern 4A is formed on the shelf side surface of the bag board 3A.
is formed, and a through hole 5 is provided at the end of the pattern 4A on the bag board 3B side.

On the other hand, the bag board 3B is provided with a pattern 4B to be connected to the pattern 4A of the bag board 3A, and a through hole 5 is provided at the starting point of the pattern 4B in correspondence with the through hole 5 on the bag board 3A side. be.

Conventionally, these patterns 4A and 4B
In order to connect the two bag boards, terminal boards 10 of the same shape are mounted in parallel and close to each of both bag boards. Specifically, the terminal board 10 is inserted between an insulating base of a molded product, which has an elongated plate-shaped base and spacer pieces arranged in a comb shape at equal pitches on the base, and the respective spacer pieces. L
It is composed of a shaped metal fitting 11.

The L-shaped fitting 11 consists of a horizontal member 11B having a hole into which the shaft of the machine screw 16 is inserted, and a vertical member 11A having a pin inserted into the through hole 5 at its tip. The vertical member 11A is inserted into the slit of the insulating base so that the lower surface of the insulating base is in close contact with the upper surface of the base.

[0011] By bringing the back side of the insulating stand into close contact with the outer surface of the bag board, and inserting and soldering the pins at the tip of the vertical member 11A into the corresponding through holes 5, the terminal board 10
are installed on each bag board 3A and 3B.

Spacing bolts 12 are installed at the upper and lower ends of the terminal board 10, and nuts 13 are screwed into the screw portions that penetrate the bag board and protrude toward the shelf side, thereby attaching the terminal board 10 to the bag board. It is stuck to.

On the other hand, reference numeral 15 denotes a rectangular shorting plate made of copper-based metal, and the shorting plate 15 is provided with a hole into which the shaft of a machine screw 16 is inserted. A pair of terminal boards 10 arranged oppositely
Insert the above-mentioned shorting plate 15 between each spacer piece,
Place the short circuit plate 15 on the horizontal member 11B of both L-shaped fittings 11 so as to bridge the horizontal member 11B of each L-shaped fitting 11, screw the machine screw 16 into the screw hole of the insulating stand, and attach the lower surface of the shorting plate 15 to the horizontal member 11B of each L-shaped fitting 11.
Crimp the top surface of B and pattern 4A of bag board 3A.
and the pattern 4B of the bag board 3B, and the L-shaped metal fitting 11.
, shorting plate 15, and the other L-shaped fitting 11.

By attaching more than ten shorting plates 15 to the terminal board 10, three to four shorting plates 15 are installed between the power supply patterns.
5 in parallel, and one shorting plate 15 is used to connect the signal patterns.

On the other hand, since the above-mentioned shorting plate 15 is exposed on the outside of the shelf 1, the shorting plate 15 may be touched by a human body or another metal object may come into contact with the shorting plate 15. To prevent this, a protective cover 17 is placed on the terminal board 10.
is attached.

The protective cover 17 is an elongated plate-shaped insulating plate that covers the upper part of the terminal board 10, and its upper and lower ends are placed on the end faces of the spacing bolts 12, and the machine screws 18 are inserted into the spacing bolts 12.
It is attached to the terminal board 10 by screwing into the screw hole of the terminal board 10.

[0017]

[Problem to be solved by the invention] By the way, the above-mentioned conventional terminal board uses machine screws to secure the short circuit board.
There is a problem in that not only is the work of installing the shorting plate cumbersome, but also the reliability of pattern connection is reduced due to loosening of the machine screws.

In addition, in order to attach the terminal board to the bag board, holes are drilled in the bag board, spacing bolts are inserted into the holes, and nuts are screwed onto the spacing bolts from inside the shelf to tighten the spacing bolts. There was a problem that the terminal board was stuck and the work of fixing the terminal board was troublesome.

The present invention was created in view of the above points, and an object of the present invention is to provide a connection structure between backboards that is easy to connect and has high connection reliability.

[0020]

[Means for Solving the Problems] In order to achieve the above object, the present invention, as illustrated in FIG. In a printed board device that is required to connect a pattern 4A of a bag board 3A and a pattern 4B of another bag board 3B, a slot 24 is provided from the umbrella-shaped head 23 to the shaft portion 22. By inserting and soldering the pin portion 21 protruding from the lower end surface into the through hole 5 of the terminal portion of the pattern 4A or another pattern 4B,
Connecting terminals 20 are provided to be mounted facing each bag board 3A, 3B.

Further, the compression coil spring 26 is fitted into the shaft portion 22 of the connection terminal 20, the washer 25 is fitted into the shaft portion 22 so as to sit on the upper part of the compression coil spring 26, and the shaft portion 2
A rectangular shorting plate 30 is provided in which a hole 31 is formed to correspond to each connection terminal 20 and has a hole 31 larger than the outer diameter of the head 2 and smaller than the outer diameter of the umbrella-shaped head 23.

Then, each hole 31 is fitted into the shaft portion 22 of the corresponding connection terminal 20 to bridge the shorting plate 30 to the connection terminal 20, and the lower end surface of the umbrella-shaped head 23 and the washer 25 are connected to each other.
The peripheral edge of the hole 31 is held between the two.

On the other hand, as illustrated in FIG.
A U-shaped cover 40 made of an insulator and having a pair of elastic side plate members 42 is fitted onto the top.

[0024]

[Operation] The connecting terminal of the present invention has a slot in the umbrella-shaped head, and a compression coil spring and a washer inserted into the shaft. Therefore, when the shorting plate is pressed down after aligning the hole of the shorting plate with the connecting terminal and bridging it, the divided umbrella-shaped heads are pressed toward each other, their outer diameters are reduced, and the holes fit into the shaft. do. When the hole passes through the umbrella-shaped head, the umbrella-shaped head expands and returns.

[0025] Therefore, since the peripheral edge of the hole is held between the lower end surface of the umbrella-shaped head and the washer, the patterns formed on both bag boards are connected via the connecting terminal and the shorting plate. At this time, since the washer is biased toward the umbrella-shaped head by the compression coil spring, the contact between the connecting terminal and the shorting plate is maintained reliably. Therefore, the reliability of the connection between both patterns is high.

[0026] Furthermore, since both patterns are connected simply by pressing the shorting plate onto the connection terminal, the connection work is simple. Further, the pair of side plate members of the U-shaped cover have elasticity. Therefore, simply by pressing the U-shaped cover toward the short-circuiting plate, the U-shaped cover is fitted onto the shorting plate. That is, the installation work of the U-shaped cover is also easy.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below with reference to the drawings. Note that the same reference numerals indicate the same objects throughout the figures.

FIG. 1 is a diagram showing an embodiment of the present invention, (A) is a partially cutaway perspective view before assembly, (B) is a sectional view after assembly, and FIG. 2 is a diagram showing another embodiment of the present invention. FIG. Figure 1
In , the bag board of the shelf (not shown) is composed of a bag board 3A and a bag board 3B, a pattern 4A is formed on the shelf side surface of the bag board 3A, and a through hole is formed at the end of the pattern 4A on the bag board 3B side. Hall 5 is provided.

On the other hand, the bag board 3B is provided with a pattern 4B to be connected to the pattern 4A of the bag board 3A,
Corresponding to the through hole 5 on the bag board 3A side, another through hole 5 is provided at the starting point of the pattern 4B.

Reference numeral 20 denotes a connection terminal made of copper-based metal. The connection terminal 20 has an umbrella-shaped head 23 provided on the upper part of the shaft portion 22.
, a disk-shaped seating part provided at the lower part of the shaft part 22 that is in close contact with the surface of the bag board 3B, and a through-hole of the terminal part of the pattern 4A or another pattern 4B that protrudes downward from the center of the lower end surface of the seating part. Pin part 2 inserted into hole 5 and soldered
It is composed of 1. Further, a slot 24 is provided from the umbrella-shaped head 23 to the shaft portion 22.

[0031] Such a connection terminal 20 is mounted facing each bag board 3A, 3B by fitting the pin part 21 into the through hole 5 of the terminal part of the pattern 4A or another pattern 4B and soldering it. has been done.

Further, the compression coil spring 26 is fitted into the shaft portion 22 of the connection terminal 20, and the compression coil spring 26
A washer 25 is inserted into the shaft portion 22 so as to sit on the upper part of the shaft portion 22. 30 is a rectangular short circuit plate made of copper-based metal. A pair of holes 31 are bored in the shorting plate 30 at positions corresponding to the respective connection terminals 20, which are larger than the outer diameter of the shaft portion 22 and smaller than the outer diameter of the umbrella-shaped head 23.

Therefore, as shown in FIG. 1A, when the holes 31 of the shorting plate 30 are aligned and bridged over the connection terminals 20 and the shorting plate 30 is then pressed down, the divided umbrella-shaped heads are formed. The portions 23 are pressed toward each other to reduce their outer diameters, and the holes 31 fit into the shaft portions 22 of the connection terminals 20. When the hole 31 finishes passing through the umbrella-shaped head 23, the umbrella-shaped head 23 expands and returns to its original position.

Therefore, as shown in FIG. 1B, the peripheral edge of the hole 31 is held between the lower end surface of the umbrella-shaped head 23 and the washer 25. That is, both bag boards 3A,
Patterns 4A and 4B formed on 3B are connection terminals 2
0 through a shorting plate 30.

Although FIG. 1 shows a bag board equipped with a pair of connection terminals, in reality, three to four pairs of connection terminals 20 are connected in parallel between the power supply patterns. A pair of connection terminals 20 are used to connect the signal patterns.

In FIG. 2, reference numeral 40 denotes a pair of elastic side plate members 42 molded from elastic synthetic resin, and a head plate member 41 that connects the longitudinal side edges of the side plate members 42.
It is a U-shaped cover consisting of.

The length of the U-shaped cover 40 is greater than the length of the shorting plate 30, and the opening width of the side plate member 42 is greater than the length of the shorting plate 30.
It is made slightly smaller than the width of . After attaching the shorting plate 30 to the pair of connection terminals 20 so as to bridge the pair of connection terminals 20, when the U-shaped cover 40 is pressed toward the shorting plate 30, the side plate member 4
2 opens its legs to sandwich the longitudinal sides of the shorting plate 30, and the protective cap 40 covers the shorting plate 30 and the connection terminal 20.

[0038] Therefore, the connection terminal 20 and the shorting plate 30
It is prevented from being touched by the human body or by other metal objects.

[0039]

As explained above, the present invention provides connection terminals to be inserted into the through holes of both bagboards, and a short circuit plate that bridges the opposing connection terminals, and the periphery of the hole in the short circuit plate is This is a connection structure between backboards that is sandwiched between the lower end surface of the umbrella-shaped head of the connection terminal and a washer, and the connection between the patterns formed on both bagboards is not only highly reliable, but also This has the excellent effect of simplifying the connection work.

[0040] Furthermore, there is an effect that the work of attaching the cover is simple.

[Brief explanation of the drawing]

FIG. 1 is a diagram of an embodiment of the present invention, (A) is a partially cutaway perspective view before assembly (B) is a cross-sectional view after assembly

[Fig. 2] Perspective view of another embodiment of the present invention

[Figure 3]
Perspective view of printed board device

[Figure 4] A diagram of the conventional example, (A) is a cross-sectional view (B) is a perspective view

[Explanation of symbols]

1 shelf,
2 Printed board, 3A, 3B bag board,
4A, 4B pattern, 5 through hole,
10 terminal board, 20 connection terminal,
21
Pin part, 22 Shaft part,
23 Umbrella-shaped head, 24 Slit split,
25 washer, 26 compression coil spring, 30
Short circuit plate, 31 holes,
40 U-shaped cover, 41 head plate member,
42 side plate member,

Claims (2)

[Claims] Claim 1: Two bag boards (3A, 3B) are attached side by side to the bottom surface of a box-shaped shelf, and the pattern (4A) of one bag board (3A) and the pattern (4A) of the other bag board (3B) are attached. In the printed board device required to connect the pattern (4B) of the umbrella-shaped head (23)
A pin part (21), which has a slot (24) extending from the shaft part (22) and protrudes from the lower end surface of the shaft part (22), is inserted into the through hole (5) at the end of the pattern and soldered. By doing so, both bag boards (3A, 3B
) and the connecting terminal (20) mounted opposite to the shaft (
The compression coil spring (26) is fitted into the compression coil spring (22), and the shaft portion (22) is seated on the upper part of the compression coil spring (26).
) and a hole (31) which is larger than the outer diameter of the shaft (22) and smaller than the outer diameter of the umbrella-shaped head (23), is connected to each of the connection terminals ( a rectangular shorting plate (30) with holes corresponding to the holes (20), and each hole (31) corresponds to the shaft portion (20) of the connecting terminal (20).
22), the shorting plate (30) bridges the pair of connection terminals (20), and the peripheral edge of each hole (31) is fitted to the lower end surface of the umbrella-shaped head (23). A connection structure between backboards, characterized in that the backboards are sandwiched by the washer (25). 2. A bag characterized in that a U-shaped cover (40) made of an insulator and having a pair of elastic side plate members (42) is fitted onto the shorting plate (30) according to claim 1. Connection structure between boards.