JPS5843272Y2 - Mounting structure of printed circuit board - Google Patents

Description

[Detailed description of the invention] The present invention is a control device having a semiconductor element such as a thyristor Leonard device, in which a printed circuit board for controlling the semiconductor element is attached to the cooling fin of the semiconductor element, thereby making effective use of the mounting space. At the same time, the present invention relates to a printed circuit board mounting structure that facilitates inspection by providing a rotating mechanism on the base.

As shown in FIG. 1, a printed circuit board in a conventional control device having a semiconductor element is provided with a storage box 1, and a printed circuit board 2 is inserted along a slide groove 3 of this box 1 and connected to a receptacle connector 4. I was trying to do that.

Also, due to space constraints, this printed circuit board storage box 1 is mounted on the door cover 6 of the control device housing 5, as shown in FIG.
In some cases, it was attached to the inner surface of the

In FIG. 2, 1 is a printed circuit board storage box, 2 is a printed circuit board, 5 is a control device housing, 6 is a door cover, 7 is a device mounting plate, 8 is a semiconductor element, and 9 is an internal device.

The semiconductor element 8 and the internal equipment 9 are mounted on the equipment mounting plate 7, and the printed circuit board storage box 1 is mounted on the door cover 6, and then wiring is provided between them.

In such a conventional structure, the structure of the printed circuit board storage box 1 is complicated, and in order to attach the printed circuit board storage box 1 to the door cover, it is difficult to connect the printed circuit board and the equipment and semiconductor elements inside the case. The work efficiency was poor because complicated flexible wiring had to be installed on the board, and there was also the inconvenience of having to take out the printed circuit board from the storage box each time it was inspected.

The present invention eliminates the above-mentioned drawbacks, and by attaching the printed circuit board using the cooling fins of the semiconductor element, the equipment storage space inside the device can be used effectively, and the device housing structure can be simplified. The purpose of this invention is to eliminate flexible wiring between the door surface and the inside of the casing, and to provide a rotating mechanism to the printed circuit board mounting base to facilitate inspection of the printed circuit board.

FIG. 3 is a perspective view showing an embodiment of the printed circuit board mounting structure according to the present invention.

In the figure, two semiconductor devices 10 are attached to U-shaped cooling fins 11, and rotary support shafts 12 are attached to both sides of the opening end of the cooling fin, and a printed circuit is connected through an insulating bushing 13. The mounting base 14 for attaching the plate receptacle connector 5 is the cooling fin 11.
It is attached across the open end of the

The receptacle connector 15 is fitted and attached to a fitting plate 16 formed integrally with the mounting base 14.

The terminals of the printed circuit board 17 are inserted into the receptacle connector 15, and one end opposite to the terminal side is supported by a printed circuit board support 18 made of an insulator and fixed with screws 19.

Since the receptacle connector mounting base 14 can rotate around the rotation support shaft 12, the printed circuit board 1
7 can be inserted into the receptacle connector 15 and rotated.

FIG. 4 shows a cross section of the rotation mechanism, in which the insulating bushing 13 is fixed to the receptacle connector mounting base 14 and is loosely mated with the rotation support shaft 12 with a gap.

Therefore, the receptacle connector mounting base 14 can rotate around the rotation support shaft 12, and is sufficiently electrically insulated from the cooling fins 11 of the semiconductor element.

FIG. 5 and FIG. 6 show an embodiment of a control device adopting the present invention.

FIG. 5 is a plan sectional view thereof, and FIG. 6 is a side sectional view thereof.

In FIGS. 5 and 6, symbols 10 to 18 refer to the third
Same as the figure.

The semiconductor element 10 and the printed circuit board 17 are provided with cooling fins 11
It is integrated with other internal devices 21 on a device mounting/bottom plate 20, and is covered with a protective cover 22 after wiring between the devices is done.

The back side of the printed circuit board 17 can be inspected by rotating the printed circuit board 17 as shown by the arrow with the protective cover removed.

Further, since all the attached devices including the printed circuit board 17 are attached to the attachment plate/bottom plate 20, there is no need to provide a sturdy door cover, and it is sufficient to cover it with a simple protective cover 22.

According to the present invention, as described above, the space inside the control device housing is effectively utilized, the housing structure is simplified, and there is no need for complicated flexible wiring, which helps reduce the cost of the control device, and reduces the cost of printed circuit boards. This makes inspection easier and contributes to improved maintainability.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the structure of a conventional printed circuit board storage box, Fig. 2 is a plan sectional view showing the structure of an example of a conventional control device, and Fig. 3 is a printed circuit board mounting structure according to the present invention. FIG. 4 is a sectional view of a printed circuit board rotating mechanism, and FIGS. 5 and 6 are a plan sectional view and a side sectional view showing an example of a control device employing the present invention. .

Claims (1)

[Scope of utility model registration request] In a control device having semiconductor elements, a plurality of semiconductor elements are attached to a common cooling fin that surrounds a space except in one direction, and a printed circuit board for controlling the semiconductor elements is attached to an open end of the cooling fin. Give it to me and attach it.
A mounting structure for a printed circuit board, characterized in that the printed circuit board is configured to be rotatable around a rotation support shaft provided on the cooling fin, thereby facilitating inspection of the printed circuit board.