JPH0729869U - Printed circuit board for power wiring - Google Patents

Abstract

(57) [Summary] [Purpose] Wiring work can be performed easily and easily without the work of connecting the electric wire of the electronic circuit to the crimp terminal or screwing the crimp terminal to the bus bar. Be able to do it reliably. [Structure] DC stabilized power supply 1 and bus bar 2 with thick electric wire 3
To connect electrically. The printed circuit board 11 is fixed to the bus bar 2 with mounting screws 12. Printed circuit board 1
Copper foil 16 electrically connected to bus bar 2 on the back surface of 1
A and 16B are respectively printed and wired, and a plurality of connector pins 13 are planted on the front surface side. A connector 14 is attached to the other end of the thin electric wire 7 whose one end is connected to the electronic circuit unit 6 through the connector 8.
By connecting the connector 14 to the connector pin 13, the DC stabilized power supply 1 and the electronic circuit unit 6 are electrically connected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printed wiring board for power wiring.

[0002]

[Prior art]

Conventionally, when supplying a DC current from a large DC stabilized power supply to an electronic circuit composed of an IC, etc., the capacity of the DC stabilized power supply is a large capacity such as 3 KW, and an electronic circuit composed of an IC or the like is usually Since there is only a voltage tolerance range of 5V ± 5% from the IC specifications, the wiring from the DC stabilized power supply to the electronic circuit has a resistance peculiar to the wiring material. In order to reduce the voltage drop, it is supplied to the electronic circuit through a bus bar made of high-purity copper. When the distance from the DC stabilized power supply to the electronic circuit is 5 m and the voltage drop due to the wiring material is 0.1 V with a margin from the allowable range of 5 V ± 5%, the resistance of the wiring material is 0.1 V ÷ 600 A = 1.6 × 10 ⁻⁴ Ω. Therefore, assuming that the resistance of the copper wire is 0.017 Ω / m at 1 mm ² , the cross-sectional area of the bus bar is (0.017 × 10) ÷ 1. A large cross-sectional area of 6 × 10 ⁻⁴ ≈1000 mm ² is required.

On the other hand, since the electronic circuit is composed of a unit or a printed circuit board unit, power is supplied from the bus bar having a large cross-sectional area to the electronic circuit by a connector, but an electric wire connectable to the connector is usually 2 mm ² Therefore, the power supply from the bus bar with a large cross-sectional area to the electronic circuit is the shortest distance, and the electric wire is screwed and fixed to the bus bar, and the current is supplied to the electronic circuit by the connector.

FIG. 2 is a perspective view showing a conventional example of power supply from a DC stabilized power supply by a bus bar to an electronic circuit. In the figure, 1 is a stabilized DC power supply, which is connected to two bus bars 2 by a thick electric wire 3 in the shortest distance. The bus bar 2 is made of pure copper, and a plurality of crimp terminals 4 are fixed by set screws 5. The crimp terminals 4 and the electronic circuit unit 6 are electrically connected to each other through a thin electric wire 7 and a connector 8. is doing.

In such a configuration, since each electronic circuit unit 6 has a small current value of several A, even if current is supplied from the DC stabilized power supply 1 through the thin electric wire 7 and the connector 8, the voltage of the electric circuit unit 6 is reduced. Although the descent is not great, when the number of electronic circuit units 6 increases, the work of connecting the thin electric wire 7 from the bus bar 2 through the crimp terminal 4 with the set screw 5 becomes difficult. When one electronic circuit unit 6 is set to 5 A, considering a power supply device having a current capacity of 3 KW and 600 A, 120 thin electric wires 7 for an electronic circuit are connected to the bus bar 2 via the crimp terminal 4 by the set screw 5. Therefore, it is necessary to make a hole in the bus bar 2, perform tapping work, crimp the thin wire 7 to the crimp terminal 4, and screw the press terminal 4 to the bus bar 2. Met. Further, there is a problem that the connection becomes unstable due to improper tightening of the set screw 5, etc., resulting in low reliability.

[0006]

[Problems to be solved by the device]

 As described above, in each of the conventional busbars 2 shown in FIG. 2, the crimp terminals 4 are fixed to the busbars 2 one by one by the setscrews 5, so the screwing operation is extremely complicated and the workability is low. There was a problem that it was bad and the reliability of screw tightening was low.

Therefore, the present invention has been made in view of the above-described conventional problems, and an object thereof is to connect an electric wire of an electronic circuit to a crimp terminal or screw the crimp terminal to a bus bar. (EN) It is possible to provide a printed wiring board for a power supply wiring, which does not require any work to perform, makes the work of connecting electric wires simple and easy, and can be performed with high reliability.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, according to the present invention, a printed circuit board, in which a conductive portion is formed and a connector for supplying power electrically connected to the conductive portion is arranged, is fixedly arranged on a bus bar, and the conductive board is provided. The connector and the busbar are electrically connected, and the connector provided on the electronic circuit side is connected to the connector.

[0009]

[Action]

 In the present invention, power is supplied from the bus bar to the printed circuit board for power wiring by electrical connection between the conductive portion and the bus bar. The printed circuit board and the electronic circuit are electrically connected by the connector connection, eliminating the need for screwing the crimp terminal to the bus bar.

[0010]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a perspective view showing an embodiment of a printed circuit board for power supply wiring according to the present invention. In the figure, the same components as those of the conventional device shown in FIG. 2 are designated by the same reference numerals and the description thereof is omitted. In this embodiment, one power supply wiring printed circuit board 11 is fixed to two bus bars 2 by a plurality of mounting screws 12, and a plurality of connector pins 13 (13A, 13B) as connectors are mounted on the printed circuit board 11. A connector 14 is provided at the other end of two thin electric wires 7 which are provided in two rows in the longitudinal direction of the printed board 11 and one end of which is connected to the electronic circuit unit 6 through a connector 8, respectively. It is configured to connect to the connector pin 13.

Copper foils (conductive parts) 16A and 16B are printed and wired on the back surface of the printed circuit board 11 over the entire length in the longitudinal direction corresponding to the connector pins 13A and 13B in each row. The connector pins 13A and 13B are erected at the same pitch with respect to the respective copper foils 16A and 16B, and the lower ends thereof are fitted into the pin holes formed in the printed circuit board 11, respectively. Soldered. Therefore, the copper foils 16A and 16B are electrically connected to the connector pins 13A and 13B, respectively, and are electrically connected to the corresponding bus bars 2 by contacting them. The mounting screw 12 is screwed into a screw hole of each bus bar 2 through a screw mounting hole formed in the printed circuit board 11 to electrically connect the corresponding copper foil 16A, 16B to the bus bar 2. .

The connector 14 connected to the thin electric wire 7 has a connector case 17 formed of an insulating material such as a resin, and a space equal to the space between the connector pins 13A and 13B in the connector case 17. And a pair of connector sockets 18A and 18B arranged in parallel. Each of the connector sockets 18A and 18B is formed as an elastic cylindrical body whose peripheral surface is partially notched and opened by a metal plate. Each is connected to a thin electric wire 7. The connector sockets 18A and 18B are adapted to be fitted and connected to an arbitrary set of connector pins 13A and 13B which face each other in the direction orthogonal to the longitudinal direction of the printed circuit board 11.

In such a configuration, the stabilized DC power supply 1 and each bus bar 2 are electrically connected by two thick wires 3, and each bus bar 2 and the copper foil 16A of the printed circuit board 11 are connected to each other. 16B is in direct contact with and electrically connected to the mounting screw 12. Further, the electrical connection between the bus bar 2 and the electronic circuit unit 6 is established through the connection between the connector pin 13 and the connector 14 through the thin electric wire 7, the connector 8 and the printed circuit board 11. Therefore, the stabilized DC power supply 1 and the electronic circuit unit 6 can be reliably electrically connected.

In this case, since the present invention adopts the connection method using the connector pin 13 and the connector 14, the connection work is significantly simpler and easier than the conventional method in which the crimp terminal is screwed and fixed to the bus bar 2. In addition, it has the advantage that it can be connected securely. Also, the mounting screws 12 serve to mechanically fix the printed circuit board 11 to each bus bar 2 and to ensure the electrical connection between each bus bar 2 and the copper foils 16A and 16B. Less than the number of pins 13 is required. Further, since the electronic circuit unit 6 has a current capacity of several amperes, it is possible to sufficiently supply electric power for circuit operation by means of the thin electric wire 7, the connector 8, the connector pin 13 and the connector 14, and the printed circuit board 11 The current capacity of the copper foils 16A and 16B is usually said to be 1 A / 1 mm width, and it is possible to sufficiently supply power from the bus bar 2 to the connector pin 13.

The present invention can be modified and changed in various ways without being limited to the above embodiment. For example, the connector pins 13 are housed in the connector case and fixed to the printed circuit board 11 by soldering. Good. It goes without saying that the relationship between the connector pin and the socket may be reversed. Furthermore, although the power supply is described with the two thick electric wires 3 and the thin electric wires 7, it is possible to further improve the reliability by arranging a plurality of electric wires in parallel. As described above, a plurality of power sources such as 3V, 5V, 12V may be used, and the more power sources, the more effective the connectorization is.

[0016]

[Effect of device]

 As described above, the printed wiring board for power supply according to the present invention is configured such that the printed wiring board is attached to the power supply bus bar and electrical connection between the printed wiring board and the electronic circuit is achieved by connecting the connectors. Therefore, there is no need to screw the crimping terminal to the bus bar or to connect the electric wire of the electronic circuit to the crimping terminal at the time of wiring, and wiring work can be performed easily and easily. The more the connector is used, the more effective the wiring material can be made and be mass-produced. In addition, the power supply from the bus bar to the printed circuit board can be done at the same time as the fixing work with the fixing screw of the printed circuit board, so the work time can be shortened and the production cost can be reduced. Effect is very large.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a printed circuit board for power wiring according to the present invention.

FIG. 2 is a perspective view showing an example of power supply from a conventional DC stabilized power supply to an electronic circuit by a bus bar.

[Explanation of symbols] 1 DC stabilized power supply 2 Bus bar 3 Thick electric wire 4 Crimp terminal 5 Set screw 6 Electronic circuit unit 7 Thin electric wire 8 Connector 11 Power supply wiring printed board 12 Mounting screw 13, 13A, 13B Connector pin 14 Connector 16A, 16B copper foil (conductive part)

Front page continuation (72) Inventor Kotaro Nakajima 36, Terada Shinike, Joyo-shi, Kyoto Prefecture Seiwa Electric Co., Ltd. Industry Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A printed circuit board on which a conductive portion is formed and a power supply connector electrically connected to the conductive portion is arranged is fixedly arranged on the bus bar to electrically connect the conductive portion and the bus bar. And a connector provided on the electronic circuit side is connected to the connector, and a printed wiring board for power supply wiring.