JPS58931Y2 - Coupling mechanism between printed board and power supply - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coupling mechanism between a printed board and a power supply device for supplying large amounts of power from the power supply device to the printed board.

Generally, when supplying large amounts of power to a printed circuit board, a mechanism is employed in which the power supply device is connected to the printed circuit board using screws.

In this case, the conventional coupling mechanism is a mechanism in which a screw 1 is passed through a through hole 3 drilled in a printed board 2 and screwed into a power supply device 4 to couple the printed board 2 and the power supply device 4, as shown in FIG. A screw 1 and a power supply device 4 are directly attached to the plated part 8 that protects the periphery of the printed board through hole 3.
are in contact with each other.

However, since the plated portion 8 is softer than the screws 1 and the power supply device 4, tightening from above and below causes wear due to force, and the connection between the printed board 2 and the power supply device 4 is extremely poor, resulting in poor electrical connection. is also often defective.

Furthermore, after inserting the screw 1 into the printed board penetration plate 3, the printed board 2 is brought into contact with the power supply device 4, and the female screw 1 is screwed into the screw hole 4B, but for processing reasons, a female thread is formed in the through hole 3. Therefore, the screw 1 once inserted into the through hole 3 may fall out.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, improve the connection between the printed board and the power supply, and prevent the screws that serve as the connection means from falling off. A power supply section of a printed board having a conductive plated portion around an inner wall and both surfaces, a conductive stud having a cylinder in contact with the inner wall plated portion and a flange in contact with one of the peripheral plated portions, and a cylinder in contact with the inner wall plated portion. and a conductive washer having a flange in contact with the other peripheral plated portion, and screws for fixing the studs and washer to the power supply through respective through holes, and the flange of the stud and washer is connected to the periphery of the printed board. This is achieved by a mechanism for connecting the printed board and the power supply device, which is characterized in that the plated portion is soldered and fixed in advance.

Hereinafter, the present invention will be explained by way of examples with reference to the accompanying drawings.

As shown in FIG. 1, a coupling mechanism 10 for a printed board and a power supply device according to the present invention has a cap-shaped stud 15 (second
(a) and the screw 11 via the washer 16 (Fig. 2 b).
This is a mechanism for connecting the printed board 12 and the power supply device 14.

A through hole 13 is bored in the print 12, and a conductive plated portion 18 is formed around the inner wall and both surfaces of the through hole 13.

The stud 15 has a shape in which a cylindrical body 15A and a flange 15B are integrally molded, and the cylindrical body 15A extends from above to below the flange 15B. (FIG. 1, FIG. 2a).

A hole 15C is formed in the cylindrical body 15A, passing through from the top to the bottom, so that the screw 11 can pass through the cylindrical body 15A.

The through hole 15C is divided into two parts of different sizes, with the upper part being smaller and the lower part being larger (FIG. 1).

A female thread is cut in the upper part, and if the screw 11 is screwed into this part in advance, it will not fall off, and then the screw 11 can easily pass through the large lower part and be screwed into the tapped hole 14B of the power supply device 14.

The edge of the flange 15B is inclined (FIGS. 1 and 2a), and when the stud 15 is inserted into the through hole 13 of the Phnom board 12, the plated portion 1 around the edge and the printed board through hole 13 is inserted.
When solder 17 is applied between 8'B, the soldering area becomes large and the stud 15 and printed board 12 are firmly connected.

The washer 16 has a shape in which a cylindrical body 16A and a flange 16B are integrally molded, and the flange 16B is formed at the lower end of the cylindrical body 16A.

A through hole 16C is formed in the cylindrical body 16A, through which the screw 11 can pass, and the flange 16
The edge of B is angled for the same reason as for stud 15.

The cylindrical body 16A is in contact with the inner wall plated portion 18'A of the printed board through hole 13.

The screw 11 has a screw head 11A and a screw shaft 11B,
The screw shaft 11B has a male thread (FIG. 1).

The power supply device 14 has a recess 14A and a female screw hole 14B into which the screw 11 is screwed.

In the recess 14A, when the power supply device 14 and the printed board 12 are connected, the screw shaft 11B is dislodged by one device to prevent the printed board 12 from floating up.

Furthermore, stud 15. Washiya 16. The power supply device 14 is surface-treated (for example, gold plated) to facilitate the flow of current.

Among the members configured as above, first the stud 1
5 and washer 16 are inserted into the printed board through hole 13.

In this case, in FIG. 2A, a portion of the cylindrical body 15A of the stud 15 below the flange 15B is inserted into the printed board through hole 13, and the edge of the flange 15B and the printed board 12 are inserted into the printed board through hole 13.
Attach solder 17 between them.

Also, the stud 1 soldered to the printed board 12
Washer 16 is inserted into the printed board through hole 13 from the opposite side of 5.
The cylinder 16A is inserted, and solder 17 is applied between the edge of the flange 16B and the printed board 12.

” - When the stud 15 and washer 16 are inserted into the printed board through hole 13, the stud 15 and washer 16
do not come into close contact with each other, and a space of height H is formed between them (Fig. 1), and the expansion of the stud 15 and washer 16 due to Joule heat generated when a large amount of power is supplied is absorbed, and the solder 17 does not come off. It looks like this.

Next, insert the screw 11 into the female screw hole at the top of the stud through hole 15C.
and pass the screw shaft 11B through the stud 15 and the inside of the washer 16 to tighten the female thread 14B of the washer 16.
By screwing them in, the Phnom plate 12 and the power supply device 14 are combined.

As described above, according to the coupling mechanism of the printed board and the power supply device according to the present invention, the tightening force of the screw 11 and the power supply device 14 is absorbed by the stud 15 and washer 16, so that the conductive plated portion 18' is not worn out. Printed board 12 and power supply 1
4 are well connected, and since the screw 1 can be set once in the female screw hole formed in the stud 15, the screw 1 will not fall out when screwed into the power supply device 14.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the coupling mechanism of the printed board and power supply device according to the present invention, Fig. 2 is a perspective view showing the stud and washer of the mechanism of the present invention, and Fig. 3 is a conventional coupling mechanism of the printed board and power supply device. It is a sectional view showing a state. 10... Connecting mechanism of printed board and power supply device according to the present invention, 11... Screw, 12... Printed board, 13... Printed board through hole , 14・
...Power supply device, 15...Conductor stud, 15A...Stud cylinder, 15B...
・Stud flange, 15C...Stud through hole, 16...Conductor washer, 16A...
...Washer cylinder, 16B...Washer flange, 16C...Washer through hole, 17
...Solder, 18'...Conductive plating part, 18'A...Inner wall plating part, 18'B...
... Surrounding plating part.

Claims (1)

[Scope of utility model registration request] A power supply section of a printed board having a through hole 13 in a printed board 12 and a conductive plated part 18 around the inner wall and both sides, a cylinder 15A in contact with the inner wall plated part 18A, and a flange 15B in contact with one of the surrounding plated parts 18B. A conductor stud 15 having a cylindrical body 16A in contact with the inner wall plated portion 18A and a conductor washer 16 having a flange 16B in contact with the other peripheral plated portion 18B, through the stud and washer through holes 15C and 16C. and a screw 11 for fixing the stud to the power supply 14, and the stud and washer flange 15B.
, 16B are roughened and fixed to the peripheral plated portion 18B of the printed board 12 by soldering.