JPH0639493Y2 - Assembly of electrical components - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an assembly of electric parts including electronic parts that generate heat such as power parts such as an inverter circuit.

[Conventional technology]

A high-frequency lighting device having an inverter circuit is used for a general household fluorescent lamp lighting fixture. The inverter circuit includes a heat-generating electronic component such as a power transistor, for example, the power transistor is previously soldered to a printed wiring body, and accommodated in a bottomed box-shaped storage case,
The power transistor is attached to the inner wall by screws or the like to form a heat transfer structure. Next, a separate heat sink is attached to the inner wall of the case so that the heat generated from the power transistor is absorbed and cooled.

[Problems to be solved by the device]

By the way, when an electric circuit including a heat-generating electronic component such as a power transistor is housed in a housing case like the above-described inverter circuit, it is screwed and a heat dissipation structure of the power transistor is also required. It is necessary to attach it to the inner wall of the case that has heat dissipation by using screws. Therefore, it takes a lot of time to align the power transistor with the case mounting position or to house and mount the power transistor in the case, which causes a difficulty in assembling.

[Means for Solving the Problems]

The assembly of the electric component of the present invention includes a heat-generating electronic component, a heat dissipation plate having a slit formed at a mounting position of the heat-generating electronic component, and a fitting hole formed at another position, and a printed circuit board side. A printed wiring body with a mounting piece formed on the end face, and one side surface with one side surface and a lower surface opened, and a mating hole formed on the non-open side surface And a rectangular parallelepiped storage case formed with a caulking piece projecting from the base plate, the printed wiring body mounting piece is inserted into the fitting hole of the heat dissipation plate, and the printed wiring body is detachably installed on the heat dissipation plate. In addition, another mounting piece of the printed wiring body is inserted into the fitting hole of the storage case, and the caulking piece of the storage case is inserted into the fitting hole of the heat dissipation plate to be caulked and fixed. Is characterized by.

[Action]

According to the above technical means, after the printed wiring body on which the electronic components other than the heating electronic component are mounted is erected on the heat dissipation plate, the leads of the heating electronic component are inserted into the printed wiring body and the heat generation electronic component is mounted on the heat dissipation plate. Attach and fix to. Next, the heat dissipation plate and the printed wiring body are fitted and attached to the opening surface of the storage case to be united, fixed by caulking, and the leads of the heat-generating electronic component are fixed by soldering to the printed wiring body. As a result, the heat-generating electronic components can be efficiently dissipated, and the assembling of the components becomes easy.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, (1) is a heat dissipation plate, (2) is a printed wiring body, and (3) is a storage case. The heat radiating plate (1) is a rectangular metal flat plate to which a power electronic component (4), for example, a power transistor is attached, and the metal flat plate is inwardly embossed at the attachment position and the heat radiating slit (1a ) Is formed on the lower side portion and the side side portion, and the fitting holes (1b) (1b) of the respective mounting pieces (2a) and caulking pieces (3a) of the printed wiring body (2) and the storage case (3) described later are formed. 1c) is drilled. The printed wiring body (2) is an electronic component other than the electronic component (4) mounted on a printed circuit board (2c), and the printed circuit board (2c) has insertion holes for leads (4a) of the electronic component (4). The mounting pieces (2a) and (2b) are provided on the end faces on the opposite 2 side. The storage case (3) is a rectangular parallelepiped metal housing with one side surface and a bottom surface opened,
The above-mentioned mounting caulking pieces (3a) are formed on both sides of the side surface, and mounting tongue pieces (3b) are provided on both sides of the lower surface opening, and as shown in FIG. 2, the side surface facing the side surface opening. A fitting hole (3c) for the mounting piece (2b) of the printed circuit board (2c) is formed in the.

When the heat dissipation plate (1) and the printed wiring body (2) are housed in the housing case (3) in the above configuration,
First, the mounting piece (2a) of the printed wiring body (2) on which electronic components other than the heat-generating electronic component (4) are mounted is inserted into the fitting hole (1b) of the heat radiating plate (1) and is detachably erected. .
Next, after inserting the lead (4a) of the electronic component (4) into the printed circuit board (2c) and screwing and fixing it to the mounting position of the plate (1) from the inside, the fitting hole (1c) of the plate (1) ) Insert the caulking piece (3a) of the storage case (3) into the). At the same time, the mounting piece (2b) of the printed circuit board (2c) is inserted into the fitting hole (3c) of the storage case (3) and the caulking piece (3a) is caulked, and the plate (1) and the printed wiring body (2). Are fitted and attached to the opening surface of the storage case (3) to be united. Then, the leads (4a) of the electronic component (4) are fixed by soldering on the back surface side of the printed circuit board (2c).

The position of the mounting piece formed on the printed wiring body (2) is not limited to the end surface on the opposite side 2. Therefore, the position of the fitting hole for inserting the mounting piece formed in the storage case is also the same as in the above embodiment. The position is not limited, and the position can be appropriately selected according to the position of the attachment piece. Also,
The attachment of the heat-generating electronic component is not limited to the above embodiment, but may be fixed to the heat radiation plate in advance.

Also, since the printed wiring board is detachably installed upright on the heat dissipation plate, some play will occur, so these members should be well fitted to the assembly jig and assembled accurately according to the accuracy of the jig. You can

[Effect of device]

According to the present invention, a printed wiring body is erected on a heat radiation plate having a heat radiation slit to fix power electronic components to the heat radiation plate, and then the heat radiation plate and the printed wiring body are fitted and mounted in a storage case. Then, the heat-generating electronic components are easily attached and the assembling property is improved because the electronic components are accommodated by being united and caulked and fixed.

[Brief description of drawings]

1 and 2 are perspective views seen from the front and rear, showing an embodiment of a heat dissipation structure for an electric circuit according to the present invention. (1) ...... Heat dissipation plate, (1a) ...... Heat dissipation slit, (2) ...... Printed wiring body, (3) ...... Storage case, (4) ...... Electronic parts.

Claims (1)

[Scope of utility model registration request] 1. A heat-generating electronic component, a heat-dissipating plate having a slit formed at a mounting position of the heat-generating electronic component and a fitting hole formed at another position, and a mounting piece on a side end surface of a printed circuit board. Formed printed wiring board, one side surface and bottom surface are open, and a fitting hole is formed on the side surface that is not open, and two opposite side surfaces that are not open are caulked by protruding in one open side direction. A rectangular parallelepiped accommodating case having a piece formed therein, wherein the printed wiring body is detachably erected on the heat radiation plate by inserting the mounting piece of the printed wiring body into the fitting hole of the heat radiation plate. Another feature is that the other mounting piece of the wiring body is inserted into the fitting hole of the storage case, and the caulking piece of the storage case is inserted into the fitting hole of the heat dissipation plate and caulked and fixed. Assembly of parts.