JP2823186B2 - Electronics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device having a metal case.

[0002]

2. Description of the Related Art Conventionally, a long metal case having rising pieces on at least both sides, a printed circuit board disposed on an inner bottom surface of the metal case, and a heat-generating component such as a power semiconductor element supported by the printed circuit board are required. And a heat sink attached to the heat-generating component, wherein the heat sink is arranged in parallel with the longitudinal direction of the metal case, and an electronic device configured such that a bent portion at one end of the heat sink contacts the inner surface of the rising piece. Are known.

[0003]

However, since a long metal case is often formed of a thin aluminum plate or the like, its strength is not sufficient, and the metal case is deformed by the pressure on the outer surface due to careless handling. It should be noted that there is a problem to be solved that is easy. Further, the bent portion at one end of the heat radiating plate could not sufficiently contact the inner surface of the rising piece, resulting in insufficient heat radiation. The present invention has been made in view of the above problems and aims to improve the strength and heat radiation of an electronic device including a metal case having a longitudinal shape.

[0004]

SUMMARY OF THE INVENTION To summarize the present invention, an elongated metal case having rising pieces on at least both sides, a printed board disposed on an inner bottom surface of the metal case, and a power board supported by the printed board. Heating components such as a semiconductor element for use, and a heat sink attached to the heat generating component.The heat sink is arranged at right angles to the longitudinal direction of the metal case. An electronic device in which a bent portion and a rising piece are stopped by an elastic metal clip so as to be in contact with an inner surface, and a notch for positioning the metal clip is formed at an upper end of the rising piece.

[0005]

According to the present invention, the heat radiating plate is disposed at right angles to the longitudinal direction of the metal case, and the bent portions at both ends of the heat radiating plate sufficiently contact the inner surface of the rising piece of the metal case. Since the rising piece is stopped by the elastic metal clip, it not only reinforces the side surface of the metal case but also contributes to heat dissipation of the heat-generating component. In addition, since the notch for positioning the metal clip is formed at the upper end of the rising piece, displacement of the metal clip is accurately prevented.

[0006]

EXAMPLES Next, examples of the present invention will be described. However, these are merely specific examples adopted based on the present invention, and the present invention is limitedly interpreted based on matters specific to only the examples. The technical scope of the present invention must be determined based on the matters stated in the claims or matters substantially equivalent to the matters.

In the illustrated embodiment, a metal case 2 made of elongate thin aluminum having a rising piece 1 on at least both sides, a printed board 3 disposed on the inner bottom surface of the metal case 2, and a support on the printed board 3 And a heat radiating plate 5 attached to the heat generating component 4. The heat radiating plate 5 is disposed in a direction perpendicular to the longitudinal direction of the metal case 2 and the heat radiating plate 5 is provided. The bent portion 6 and the rising piece 1 are stopped by an elastic metal clip 7 so that the bent portions 6 at both ends contact the inner surface of the rising piece 1, and a notch for positioning the metal clip 7 is provided at the upper end of the rising piece 1. Reference numeral 8 denotes the formed electronic device. Heat sink 5
May be one or more. A metal cover 9 made of aluminum or the like is attached to the upper opening of the metal case 2, and various other components (not shown) are attached to the printed circuit board 3.

According to this embodiment, the heat radiating plate 5 is arranged in a direction perpendicular to the longitudinal direction of the metal case 2, and the bent portions 6 at both ends of the heat radiating plate 5 are formed on the inner surface of the rising piece 1 of the metal case 2. Since the bent portion 6 and the rising piece 1 are held by the elastic metal clip 7 so as to be in sufficient contact with each other, the bent portion 6 and the rising piece 1 not only reinforce the side surface of the metal case 2 but also contribute to heat radiation of the heat generating component 4. In addition, since the notch 8 for positioning the metal clip 7 is formed at the upper end of the rising piece 1, displacement of the metal clip 7 is accurately prevented.

[0009]

As described above, according to the present invention, the heat radiating plate attached to the heat-generating component such as the power semiconductor element contributes to the improvement of the strength of the electronic device having the long metal case, and the heat radiating effect is also good. Becomes

[Brief description of the drawings]

1A is a plan view showing an embodiment of the present invention, FIG. 1B is a side view, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rise piece 2 Metal case 3 Printed circuit board 4 Heat generation part 5 Heat sink 6 Bending part 7 Metal clip 8 Notch

Claims (1)

(57) [Claims] An elongated metal case having rising pieces on at least both sides, a printed circuit board disposed on an inner bottom surface of the metal case, a heat-generating component such as a power semiconductor element supported by the printed circuit board, and a heat-generating element. A radiator plate attached to the component, the radiator plate is arranged at right angles to the longitudinal direction of the metal case, and the bent portion and the rising piece are so arranged that the bent portions at both ends of the heat radiating plate are in contact with the inner surface of the rising piece. Is an electronic device in which an elastic metal clip is used to hold it, and a notch for positioning the metal clip is formed at the upper end of the rising piece.