JP2565017B2 - Connection structure between backboards - Google Patents

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 circuit board apparatus in which two bagboards are mounted side by side on a shelf.

In recent years, electronic devices are required to be mounted with high density, and accordingly, as shown in FIG. 3, a box-shaped shelf 1 having a large width and an opened front surface is provided. A printed board device is used in which a large number of printed boards 2 are closely arranged in parallel.

On the other hand, a bag board having a connector on which a printed board connector plugs in is mounted on a shelf 1
The printed circuit boards are connected to each other via a bag board.

At this time, manufacturing a large-sized bag board that covers the entire bottom surface of the shelf not only increases the cost, but also causes the bag board to warp due to the increase in size and take up the shelf board. It becomes an obstacle to wear.

Therefore, avoiding the increase in the size of the bag board, as shown in FIG. 3, two small bag boards 3A, 3B having standard dimensions are arranged side by side and attached to the shelf 1 to cope with the problem. By the way, the pattern 4A formed on the bag board 3A
(Power supply pattern, signal pattern, etc.) is bag board 3B
It is required to be connected to the pattern 4B (power supply pattern, signal pattern, etc.) formed in the above.

[0006]

2. Description of the Related Art FIGS. 4A and 4B are views of a conventional example showing a connecting structure between backboards, in which FIG. 4A is a sectional view and FIG. 4B is a perspective view.

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

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

Conventionally, in order to connect the pattern 4A and the pattern 4B, a terminal board 10 of the same shape is mounted in parallel with each of the bag boards close to each other. More specifically, the terminal plate 10 has an elongated plate-like base and spacing pieces arranged and formed in the form of a comb at equal pitches on the base, and is inserted between the insulation pieces of the molded product and the spacing pieces. L-shaped bracket
It is composed of 11 and.

The L-shaped bracket 11 has a horizontal member 11B having a hole into which the shaft of the small screw 16 is inserted, and a through hole 5 at the tip.
And a vertical member 11A having a pin to be inserted into the base member.
11A is inserted into the slit of the insulating base.

The back surface of the insulating board is brought into close contact with the outer surface of the bag board, and the pin at the tip of the vertical member 11A is inserted into the corresponding through hole 5 and soldered, so that the terminal board 10 is connected to each of the bag boards 3A, 3A. It is mounted on the 3B.

A spacing bolt is provided at the upper and lower ends of the terminal plate 10.
The terminal plate 10 is fixed to the bag board by screwing a nut 13 into a threaded portion that is planted at 12 and penetrates through the bag board and protrudes to the shelf side.

On the other hand, 15 is a strip-shaped short-circuit plate made of copper-based metal, and the short-circuit plate 15 has a hole into which the shaft portion of the machine screw 16 is fitted. The short-circuit plate 15 described above is inserted between the interval pieces of the pair of terminal plates 10 arranged opposite to each other, and placed so as to bridge the horizontal members 11B of both L-shaped brackets 11, and the small screws 16 are mounted.
Is screwed into the screw hole of the insulating base, and the lower surface of the short-circuit plate 15 is pressed against the upper surface of the horizontal member 11B of each L-shaped bracket 11, so that the pattern 4A of the bag board 3A and the pattern 4B of the bag board 3B are pressed.
Are connected via an L-shaped bracket 11, a short-circuiting plate 15, and the other L-shaped bracket 11.

By connecting ten or more short-circuit plates 15 to the terminal plate 10, three or four short-circuit plates 15 are connected in parallel between power supply patterns, and one short-circuit between signal patterns. They are connected by a plate 15.

On the other hand, since the short-circuit plate 15 is exposed outside the shelf 1, the short-circuit plate 15 may be touched by a human body,
Alternatively, another metal article touches the short-circuit plate 15. In order to prevent this, a protective cover 17 is attached to the terminal plate 10.

The protective cover 17 is an elongated plate-like insulating plate which covers the upper part of the terminal plate 10 and has upper and lower ends spaced apart by bolts.
The small screw 18 is mounted on the end plate 12 and screwed into the screw hole of the spacing bolt 12 to be attached to the terminal plate 10.

[0017]

By the way, in the above-mentioned conventional terminal board, a small screw is used to fix the short-circuit board,
Not only is the work of attaching the short-circuit plate troublesome, but also the looseness of the small screw lowers the reliability of pattern connection.

In order to attach the terminal plate to the bag board, a hole is formed in the bag board, a spacing bolt is inserted into the hole, and a nut is screwed into the spacing bolt from the inside of the shelf to form the spacing bolt. There is a problem that the fixing work is troublesome because the fixing work is troublesome.

The present invention was created in view of the above points, and an object thereof is to provide a connection structure between backboards which facilitates connection work and has high reliability in connection.

[0020]

According to the present invention, as shown in FIG. 1, two bag boards 3A and 3B are attached side by side to the inner bottom surface of a box-shaped shelf.
In a printed circuit board device that is required to connect the pattern 4A of the bag board 3A and the pattern 4B of the other bag board 3B, a slot 24 is provided from the umbrella-shaped head 23 to the shaft portion 22. The pin part 21 protruding from the lower end face is
Alternatively, each of the bag boards 3A, 3B is inserted and soldered into the through hole 5 at the terminal of the other pattern 4B.
A connection terminal (20) is provided facing the.

The compression coil spring 26 fitted into the shaft portion 22 of the connection terminal 20, the washer 25 fitted into the shaft portion 22 so as to be seated on the upper portion of the compression coil spring 26, and the outer diameter of the shaft portion 22 A strip-shaped short-circuit plate (30) is provided in which a hole (31) that is larger than the umbrella-shaped head (23) and smaller than the outer diameter of the umbrella-shaped head (23) is formed corresponding to each connection terminal (20).

Then, the holes 31 are fitted in the shaft portions 22 of the corresponding connection terminals 20, and the short-circuit plate 30 is bridged to the connection terminals 20, so that the lower end surface of the umbrella-shaped head 23 and the washer 25 are joined together. The periphery of the hole 31 is sandwiched.

On the other hand, as shown in FIG.
A U-shaped cover 40 made of an insulating material having a pair of elastic side plate members 42 is fitted to the above.

[0024]

In the connection terminal of the present invention, a slot is provided on the umbrella-shaped head, and a compression coil spring and a washer are fitted into the shaft. Therefore, when the holes of the short-circuit plate are aligned on the connection terminals and cross-linked, and then the short-circuit plate is pressed, the divided umbrella-shaped heads are pressed toward each other and their outer diameters are reduced, and the holes are inserted into the shaft part. To do. When the hole passes over the umbrella-shaped head, the umbrella-shaped head expands and returns.

Therefore, since the peripheral edge of the hole is sandwiched between the lower end surface of the umbrella-shaped head and the washer, the patterns formed on both bag boards are connected to the connection terminals and the short-circuit plate. At this time, since the washer is biased toward the umbrella-shaped head portion by the compression coil spring, the contact between the connection terminal and the short-circuit plate is reliably maintained. Therefore, the reliability of connection of both patterns is high.

Further, since both patterns are connected only by pushing the short-circuit plate to the connection terminal, the connection work is easy. Further, the pair of side plate members of the U-shaped cover has elasticity. Therefore, the U-shaped cover is fitted to the short-circuit plate only by pressing the U-shaped cover toward the short-circuit plate. That is, the work of attaching the U-shaped cover is also easy.

[0027]

The present invention will be described in detail with reference to the drawings. The same reference numerals indicate the same objects throughout the 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, and FIG. 2 is another embodiment of the present invention. FIG. In FIG. 1, the bag board of the shelf (not shown) is composed of a bag board 3A and a bag board 3B.
Pattern 4A is formed on the shelf side surface of 3A, and pattern 4A
A through hole 5 is provided at the end of the bag board 3B side.

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

Reference numeral 20 is a connection terminal made of a copper-based metal.
The connection terminal 20 includes an umbrella-shaped head portion 23 provided on an upper portion of the shaft portion 22, a disc-shaped seat portion that is provided on a lower portion of the shaft portion 22 and is in close contact with the surface of the bag board 3B, and a lower end surface of the seat portion. The pin portion 21 projects downward from the center and is fitted and soldered into the through hole 5 of the end portion of the pattern 4A or the other pattern 4B. Also, from the umbrella-shaped head 23 to the shaft 22,
Is provided.

In such a connection terminal 20, the pin portion 21 has the through hole 5 in the terminal portion of the pattern 4A or the other pattern 4B.
Into each bag board by soldering
It is mounted facing 3A and 3B.

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

Therefore, as shown in FIG. 1A, the holes 31 of the short-circuit plate 30 are aligned on the connection terminals 20 and cross-linked,
Then, when the short-circuit plate 30 is pressed down, the divided umbrella-shaped heads 23 are pressed toward each other and their outer diameters are reduced, and the holes 31 are fitted into the shaft portions 22 of the connection terminals 20. And the hole 31 is an umbrella head
After passing through 23, the umbrella-shaped head 23 expands and returns.

Therefore, as shown in FIG. 1B, the peripheral edge of the hole 31 is sandwiched between the lower end surface of the umbrella-shaped head 23 and the washer 25. That is, the patterns 4A and 4B formed on both bag boards 3A and 3B are connected to the connection terminal 20 via the short-circuit plate 30.

Although FIG. 1 shows a bag board having a pair of connection terminals mounted therein, in practice, three to four pairs of connection terminals 20 are connected in parallel between power supply patterns,
The signal patterns are connected using a pair of connection terminals 20.

In FIG. 2, reference numeral 40 is a U-shaped member formed of a pair of elastic side plate members 42 formed by molding an elastic synthetic resin, and a head plate member 41 connecting the side edges of the side plate members 42 in the longitudinal direction. It is a cover.

The length of the U-shaped cover 40 is larger than that of the short-circuit plate 30, and the opening width of the side plate member 42 is slightly smaller than the width of the short-circuit plate 30. Connect the short-circuit plate 30 to a pair of connection terminals.
When the U-shaped cover 40 is pressed in the direction of the short-circuit plate 30 after it is mounted so as to bridge the short-circuit plate 20, the side plate member 42 opens to open the short-circuit plate.
Holds the side surface of 30 in the longitudinal direction, and the protective cap 40 is the short-circuit plate
30 and the connection terminal 20 are covered.

Therefore, in the connection terminal 20 and the short-circuit plate 30,
It is prevented that the human body touches or other metal objects touch it.

[0039]

As described above, according to the present invention, the connection terminals inserted into the through holes of both bag boards and the short-circuit plate bridging the connection terminals facing each other are provided, and the peripheral portions of the holes of the short-circuit plates are provided. The connection structure between the backboards, which is designed to be sandwiched between the lower end face of the umbrella-shaped head of the connection terminal and the washer, not only has high reliability of connection of the patterns formed on both bag boards, It has an excellent effect that connection work is easy.

Further, there is an effect that the work of mounting the cover is easy.

[Brief description of drawings]

FIG. 1 is a view of an embodiment of the present invention, wherein (A) is a partially broken perspective view before assembling and (B) is a sectional view after assembling

FIG. 2 is a perspective view of another embodiment of the present invention.

FIG. 3 is a perspective view of a printed board device.

FIG. 4 is a view of a conventional example, (A) is a cross-sectional view, and (B) is a perspective view.

[Explanation of symbols]

1 shelf, 2 printed boards, 3A, 3B bag board, 4A, 4B pattern, 5 through holes, 10 terminal boards, 20 connection terminals, 21 pin parts, 22 shaft parts, 23 umbrella heads, 24 slotted parts, 25 washers , 26 compression coil springs, 30 short-circuit plate, 31 holes, 40 U-shaped cover, 41 head plate member, 42 side plate member,

Claims (2)

(57) [Claims] 1. Two bag boards (3A, 3B) are arranged side by side on the inner bottom face of a box-shaped shelf, and one of the bag boards is attached.
In a printed board device required to connect the pattern (4A) of (3A) and the pattern (4B) of the other bag board (3B), from the umbrella-shaped head (23) to the shaft (22) Pickpocket (2
4) having a pin portion (21) protruding from the lower end surface of the shaft portion (22).
Is inserted and soldered into the through hole (5) at the end of the pattern, so that both the bag boards (3A, 3B)
A connection terminal (20) mounted to face, a compression coil spring (26) inserted into the shaft portion (22), and a compression coil spring (26).
A washer (25) inserted into the shaft (22) so as to be seated on the upper part of the
And a strip having holes (31) larger than the outer diameter of the shaft portion (22) and smaller than the outer diameter of the umbrella-shaped head portion (23) corresponding to each of the connection terminals (20). A short-circuit plate (30) of a shape, each of the holes (31) is fitted into the shaft portion (22) of the corresponding connection terminal (20), and the short-circuit plate (30) is a pair of the connection. A backboard which is bridged to a terminal (20) and the peripheral edge of each hole (31) is sandwiched between the lower end surface of the umbrella-shaped head (23) and the washer (25). Connection structure between each other. 2. The U-shaped cover (40) made of an insulator having a pair of elastic side plate members (42) on the short-circuit plate (30) according to claim 1.
A connection structure between backboards, which is characterized by being fitted.