JPH04342194A - Backboard interconnection structure - Google Patents

Abstract

PURPOSE:To easily connect backboards by engaging through holes with axes of connecting terminals to bridge connecting terminals of a printed circuit board and then holding circumferential areas of through holes with lower end surfaces of the umbrella-shaped heads and washers. CONSTITUTION:Compressive coil springs 26 engaged with axes 22 of connecting terminals 20 and washers 25 engaged with axes 22 to be set on the springs 26 are provided. Meanwhile, a printed circuit board 30 is provided in which through holes 31 having an internal diameter which is larger than the external diameter of axes 22 but is smaller than the external diameter of an umbrella- shaped heads 23 are provided corresponding to respective connecting terminals 20 and a couple of through holes 31 are connected via a pattern 35. The printed circuit board 30 is bridged over the connecting terminals 20 by engaging respective through holes 31 with the axes 22 of the corresponding connecting terminals 20 and the circumferential areas of through holes 31 are held by the lower end surfaces of the umbrella-shaped heads 23 and washers 25. Thereby, the connecting work can be simplified and reliability of connection can also be improved.

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 large 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] Therefore, 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 shown 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. 5 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, a compression coil spring 26 that is fitted onto the shaft portion 22 of the connection terminal 20 and a washer 25 that is fitted onto the shaft portion 22 are provided so as to be seated on top of the compression coil spring 26. On the other hand, through-holes 31 having an inner diameter larger than the outer diameter of the shaft portion 22 and smaller than the outer diameter of the umbrella-shaped head 23 are provided corresponding to the respective connection terminals 20, and the pair of through-holes 31 form a pattern 35. Printed board 30 connected via
and

Then, by fitting each through hole 31 into the shaft portion 22 of the corresponding connection terminal 20, the printed board 30 is bridged to the connection terminal 20, and the peripheral edge of each through hole 31 forms an umbrella-shaped head. 23 lower end face and washer 25
It has a configuration in which it is sandwiched between.

Furthermore, as illustrated in FIG.
A protective cap 40 made of an insulating material is provided, which has a substantially disc-shaped head 41 that covers the umbrella-shaped head 23 of 0, and a protrusion 42 protruding from the end surface of the head 41. The protective cap 40 is fitted onto the umbrella-shaped head 23 by being press-fitted into the slot 24 of the protective cap 40.

Furthermore, as illustrated in FIG. 3, the circuit component 5 can be mounted between the pattern 35A connected to one through hole 31A provided in the printed board 30 and the pattern 35B connected to the other through hole 31B.
0 is mounted on the printed board 30.

[0025]

[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 printed board's through holes are aligned and bridged over the connection terminals and the printed board is pressed down, the divided umbrella-shaped heads are pushed toward each other, their outer diameters are reduced, and the through holes are aligned with the shaft. insert.

[0026] When the through-hole passes through the umbrella-shaped head, the umbrella-shaped head expands and returns to its original position. Therefore, the peripheral edge of the through-hole hole is held between the lower end surface of the umbrella-shaped head and the washer, so the patterns formed on both bag boards are connected via the connection terminal and the pattern on the printed board.

At this time, since the washer is urged in the direction of the umbrella-shaped head by the compression coil spring, the contact between the connection terminal and the pattern 35 on the printed board is maintained reliably. Therefore, the reliability of the connection between the patterns formed on both bag boards is high.

Furthermore, since both patterns are connected simply by pressing the printed board onto the connection terminal, the connection work is simple. In addition, the protective cap is fitted onto the connecting terminal by simply inserting the protruding piece into the slot of the connecting terminal.

That is, the work of attaching the protective cap is also simple. On the other hand, by mounting the circuit components on the printed board, it is possible to insert a capacitor or the like into the power supply circuit of the bag board without directly mounting the circuit components on the bag board. Therefore, damage caused by lightning to electronic components mounted within the shelf is prevented.

[0030]

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. In these figures, (A) is a perspective view, (B) is a sectional view after assembly, and FIG. 3 is a sectional view of still another embodiment of the present invention.

In FIG. 1, the bag board of the shelf (not shown) 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.
A through hole 5 is provided in the side terminal.

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.

[0035] 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 inserted 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. 30 has a pattern 35 on the side facing the bag board.
This is a printed board with a At the left and right ends of the pattern 35, through holes 31 having an inner diameter larger than the outer diameter of the shaft portion 22 and smaller than the outer diameter of the umbrella-shaped head 23 are provided at positions corresponding to the respective connection terminals 20.

Therefore, as shown in FIG. 1A, when the through holes 31 of the printed circuit board 30 are aligned and bridged over the connection terminals 20, and then the printed circuit board 30 is pressed down, the divided umbrella-shaped The heads 23 are pressed toward each other, their outer diameters are reduced, and the through holes 31 are fitted into the shaft portions 22 of the connection terminals 20. Then, when the through hole 31 finishes passing through the umbrella-shaped head 23, the umbrella-shaped head 23
expands and returns.

Therefore, as shown in FIG. 1B, the peripheral edge of the through hole 31 is held between the lower end surface of the umbrella head 23 and the washer 25. That is, the patterns 4A and 4B formed on both bag boards 3A and 3B are as follows.
Connection is made via the connection terminal 20 and the pattern 35 of the printed board 30.

Although FIG. 1 shows a bag board equipped with a pair of connection terminals, in reality, a bag board is equipped with many pairs of connection terminals and many pairs of through holes 31 are formed in the printed board 30. 3 to 4 between the power supply patterns.
A pair of connection terminals 20 are used in parallel for connection, and signal patterns are connected using a pair of connection terminals 20.

In FIG. 2, 40 is molded from synthetic resin and has a substantially disk-shaped head 41 that covers the umbrella-shaped head 23 of the connection terminal 20, and a protruding piece 42 that protrudes from the end surface of the head 41. It is a protective cap.

The protective cap 40 is constructed by press-fitting the protruding piece 42 into the slot 24 of the umbrella-shaped head 23 of the connecting terminal 20 that protrudes outside the printed board 30 after the printed board 30 is cross-linked to the connecting terminal 20. By doing so, it is fitted onto the umbrella-shaped head 23 of the connection terminal 20 and covers the umbrella-shaped head 23.

[0042] Therefore, the connection terminal 20 is prevented from being touched by the human body or by other metal objects. In FIG. 3, a printed board 30 mounted so as to bridge connection terminals 20 mounted on each of bag boards 3A and 3B is provided with a pattern 35A connected to one through hole 31A, and a through hole 3 is provided at the end thereof.
7 is provided.

Further, a pattern 35B connected to the other through hole 31B of the printed board 30 is provided, and the aforementioned through hole 3 is provided at the end of this pattern 35B.
Another through hole 37 is provided opposite to 7.

[0044] 50 is a circuit component such as a capacitor. The circuit components 50 are mounted on the printed board 30 by inserting each lead 51 into the corresponding through hole 37 and soldering.

By doing as described above, a capacitor or the like can be inserted into the power supply circuit of the bag board without directly mounting the capacitor on the bag board. Therefore,
This prevents damage caused by lightning to electronic components mounted within the shelf.

Furthermore, in order to protect the circuit components 50 mounted on the printed board 30 and the umbrella-shaped heads 23 of the connection terminals 20, spacing bolts 61 are installed at both ends of the printed board 30, and the spacing bolts 61 are installed at both ends of the printed board 30. A protective cover 60 made of an insulating plate having approximately the same shape as the printed board 30 is placed on the top of the printed board 30.
It is installed parallel to.

[0047]

As explained above, the present invention provides connection terminals to be inserted into the through holes of both bag boards, and a printed board that bridges the opposing connection terminals, and This is a connection structure between the backboards in which the connection terminal is held between the lower end surface of the umbrella-shaped head of the connection terminal and the washer, and the connection between the patterns formed on both bagboards is not only highly reliable. , which has the excellent effect of simplifying the connection work.

[0048] Furthermore, there is an effect that the work of attaching the protective cap for protecting the umbrella-shaped head of the connection terminal is simple. Furthermore, it is possible to insert circuit components into the circuit of the bag board without directly mounting the circuit components on the bag board. For example, by installing a capacitor, electronic components mounted inside the shelf can be damaged by lightning. This has the effect of preventing people from doing so.

[Brief explanation of drawings]

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

[Figure 2] Diagrams of other embodiments of the present invention, in which (A) is a perspective view and (B) is a sectional view after assembly.

[Fig. 3] Cross-sectional view of still another embodiment of the present invention

[Figure 4
] Perspective view of printed board equipment

[Figure 5] 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
Printed board, 31, 31A, 31B through hole,
35, 35A, 35B pattern

Claims (3)

[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) with 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 a 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 through hole (31) having an inner diameter larger than the outer diameter of the shaft portion (22) and smaller than the outer diameter of the umbrella-shaped head (23). Connecting terminal(
20), and the pair of through holes (3
1) comprises a printed board (30) connected via a pattern (35), and each of the through holes (31)
is fitted into the shaft portion (22) of the corresponding connection terminal (20), the printed board (30) bridges the connection terminal (20), and the peripheral edge of each through hole (31) A connection structure between backboards, characterized in that the backboards are sandwiched between the lower end surface of the umbrella-shaped head (23) and the washer (25). [Claim 2] Umbrella-shaped head (23) of the connection terminal (20)
A protective cap (40) made of an insulating material has a substantially disk-shaped head (41) that covers the head (41), and a protrusion (42) protruding from the end surface of the head (41). Claim 1, wherein the connecting terminal (20) is fitted into the umbrella-shaped head (23) by being press-fitted into the slot (24) of the connecting terminal (20).
Connection structure between backboards described. [Claim 3] A pattern (35A) connected to one through hole (31A) provided in the printed board (30)
and the pattern (
35B), the printed board (30
2. The connection structure between backboards according to claim 1, wherein a circuit component (50) is mounted on the backboards.