JP4705271B2 - Electronic component heatsink - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention attaches electronic components that generate heat, such as transistors, ICs, LSIs, diodes, thyristors, etc., conducts heat from these electronic components, conducts heat, and dissipates heat from the radiation fins. Concerning improvement of vessel.
[0002]
[Prior art]
The electronic parts made of the semiconductor as described above are vulnerable to heat. Therefore, if the heat generated by the electronic parts is not released, not only the initial performance is exhibited, but also the failure is caused. An electronic component radiator is configured by attaching an electronic component and radiating the heat generated in the electronic component from the radiation fin.
[0003]
5 to 7 are drawings for explaining a conventional electronic component radiator, and FIG. 5 is a front view partially showing a state in which the conventional electronic component radiator is attached to a printed wiring board. 6 is a cross-sectional view taken along the line ZZ in FIG. (A) of FIG. 7 is a top view of the fixing member attached to the heat radiator of the conventional electronic component, (b) is the same front view, (c) is the right side view.
The radiator of the electronic component has good heat conductivity and good workability. For example, a plurality of radiating fins 3 (in the illustrated case, the radiating fins are 5 radiated from the base 2 of the radiator body 1 made of aluminum). Are provided in parallel, and a fixing member (mounting leg) 5 of the radiator main body 1 is provided at a base portion 2 'between the heat radiating fins 3 on the outer side and the heat radiating fins 3 on the inner side. A press-fit groove 6 is formed, and the press-fit groove 6 is formed with a pair of ribs 7 and 7 that are press-contacted with a pair of press-contact claws 5b formed at the distal end portion of the horizontal portion 5a of the fixing member 5. Two bendable leg portions 5d are formed at the lower end of the vertical portion 5c bent substantially vertically from the horizontal portion 5a of the fixing member 5.
[0004]
In order to temporarily attach the electronic component radiator thus configured to the printed wiring board 8 before the soldering step, the radiator main body is placed on the electronic component 9 disposed on the printed wiring board 8. 1 is mounted, and the leg 5d at the lower end of the vertical portion 5c of the fixing member 5 is inserted into the mounting hole 8a drilled in the printed circuit board 8, and the leg 5d is inserted into the broken line 5d. Bend it with a tool as shown by ′, and perform temporary attachment so that it will not fall off before being transferred to the next soldering step.
[0005]
[Problems to be solved by the invention]
However, in order to temporarily attach the conventional electronic component heatsink to the printed wiring board 8, the leg 5d at the lower end of the vertical part 5c of the fixing member 5 attached to the base part 2 of the heatsink body 1 is attached to the printed wiring board. 8 and the leg portion 5d must be bent with a tool as indicated by a broken line 5d ', the number of temporary attachment steps for the radiator of the electronic component is increased. There has been a problem that it is difficult to hold the electronic component radiator with the robot hand and temporarily attach it to the printed circuit board 8.
[0006]
The present invention has been devised in view of the problems as described above, and the radiator is simply inserted through the mounting hole of the printed wiring board through the fixing member attached to the base of the radiator body. An object of the present invention is to provide a radiator for an electronic component that can be easily temporarily attached to a printed wiring board.
[0007]
[Means for Solving the Problems]
In order to achieve the object, the invention according to claim 1 is configured such that the horizontal portion 11a of the fixing member 11 is press-fitted into the press-fitting groove 10c formed in the base portion 10b between the plurality of radiating fins 10a formed in the radiator body 10. Further, the engagement with the back surface 12b of the printed circuit board 12 is made when it is inserted into the mounting hole 12a formed in the printed circuit board 12 at the tip of the vertical section 11b that is bent and extends vertically from the horizontal section 11a. The claw portion 11c is formed , the rear end portion 11a 'of the horizontal portion 11a of the fixing member 11 is slightly raised, and the width thereof is equal to the width of the press-fitting groove 10c, and on both sides of the rear end portion 11a' Press-fitting claws 11d and 11d are formed on both sides of the press-fitting groove 10c to press-contact the pair of ribs 10d and 10d, and the width other than the rear end 11a 'of the horizontal portion 11a is opposite to the pair of ribs 10d and 10d. while Is obtained by a radiator of the electronic component, characterized in that you are more slightly narrower.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail according to an embodiment shown in FIGS.
1 is an external enlarged perspective view showing an embodiment of a fixing member attached to a radiator body, FIG. 2 is an external perspective view showing a state in which the fixing member is attached to the radiator body, and FIG. 3 is a direction of arrow Y in FIG. FIG. 4 is a cross-sectional view taken along line XX in FIG.
[0010]
An electronic component radiator according to claim 1 of the present invention will be described with reference to the drawings. A plurality of radiating fins formed on, for example, an aluminum radiator body 10 having good thermal conductivity and good workability. A horizontal portion 11a of a fixing member 11 made of a metal plate having spring properties and solderability is press-fitted into a press-fit groove 10c formed in a base portion 10b between 10a, and the vertical portion that is bent and extends vertically from the horizontal portion 11a. An electronic component radiator having an engaging claw portion 11c that engages with the back surface 12b of the printed wiring board 12 when inserted into the mounting hole 12a formed in the printed wiring board 12 at the tip of the portion 11b. Is.
[0011]
In order to temporarily attach the electronic component radiator thus configured to the printed wiring board 12 before the soldering process, the radiator main body 10 is placed on the electronic component 13 disposed on the printed wiring board 12. The engaging claw formed at the tip of the vertical portion 11b simply by inserting the vertical portion 11b of the fixing member 11 into the mounting hole 12a drilled in the printed wiring board 12. Temporary attachment can be performed so that the portion 11c engages with the back surface 12b of the printed wiring board 12 and does not fall off before being conveyed to the next soldering step.
[0012]
Further, the fixing member 11 is configured as described in claim 2, that is, the rear end portion 11 a ′ of the horizontal portion 11 a of the fixing member 11 is slightly raised and its width W is equal to the width of the press-fitting groove 10 c. Equally, on both sides of the rear end portion 11a ', press contact claws 11d and 11d are formed on both sides of the press-fit groove 10c so as to press contact with the pair of ribs 10d and 10d, except for the rear end portion 11a' of the horizontal portion 11a. The width w is formed so as to be slightly narrower than the facing distance between the pair of ribs 10d, 10d.
[0013]
By forming the fixing member 11 in this way, when the rear end portion 11a 'of the horizontal portion 11a is press-fitted into the press-fitting groove 10c of the radiator body 10, press claws formed on both sides of the rear end portion 11a'. The fixing member 11 can be attached so that the portions 11d and 11d are pressed against a pair of ribs 10d and 10d formed on both sides of the press-fitting groove 10c so as not to easily fall off, and the rear end portion 11a of the fixing member 11 A narrow horizontal portion 11a other than 'is lifted from between the ribs 10d and 10d, and the vertical portion 11b of the fixing member 11 is opened slightly from the base portion 10b of the radiator body 10 as shown in FIG. Therefore, when the vertical portion 11b of the fixing member 11 is inserted into the mounting hole 12a of the printed circuit board 12, the vertical portion 11b is narrowed against the opening. When inserted into 12a, the vertical portion 11b inserted into the mounting hole 12a always operates to open, so that the engaging claw portion 11c formed at the tip of the vertical portion 11b is more reliably attached to the back surface of the printed wiring board 12. It is latched by 12b and the temporary attachment of the radiator of an electronic component is performed more reliably.
[0014]
【The invention's effect】
As described above, according to the present invention, the horizontal portion of the fixing member is press-fitted into the press-fitting groove formed in the base portion between the plurality of radiating fins formed in the radiator body. Since the engaging claw portion that engages with the back surface of the printed wiring board when formed through the mounting hole formed in the printed wiring board is formed at the tip of the vertical portion that bends and extends vertically. By inserting the vertical part into the mounting hole of the printed wiring board while oppressing it against the outward opening, the engaging claw part formed at the tip of the vertical part is securely engaged with the back surface of the printed wiring board. In addition, the electronic component heatsink can be temporarily attached to the printed circuit board so that it does not fall off easily, and the tip of the vertical part is soldered and fixed to the printed circuit board in the subsequent soldering process. Can do.
[0015]
In addition, since the fixing member to be attached to the radiator body is formed as described in claim 1 , the fixing member can be securely attached so that the rear end portion of the fixing member is not easily detached from the base portion of the radiator body. In addition, the portion other than the rear end portion is slightly lifted from the press-fitting groove, and the vertical portion of the fixing member is attached to be opened slightly outward from the base of the radiator body. When inserting into the mounting hole, if the vertical part is inserted into the mounting hole in a state of being narrowed against opening, the vertical part inserted into the mounting hole always operates to open. The engaging claw portion formed at the tip is more reliably locked to the back surface of the printed wiring board, and the temporary attachment of the radiator of the electronic component is more reliably performed.
[Brief description of the drawings]
FIG. 1 is an enlarged external perspective view showing an embodiment of a fixing member attached to a radiator body of the present invention.
FIG. 2 is an external perspective view showing a state in which a fixing member is attached to the radiator body of the present invention.
FIG. 3 is a front view seen from the direction of arrow Y in FIG. 2;
4 is a cross-sectional view taken along line XX of FIG.
FIG. 5 is a front view partially showing a state in which a heat sink of a conventional electronic component is attached to a printed wiring board.
6 is a cross-sectional view taken along the line ZZ in FIG.
7A is a plan view of a fixing member attached to a radiator of a conventional electronic component, FIG. 7B is a front view thereof, and FIG. 7C is a right side view thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Radiator body 2 Base part 3 Radiation fin 4 Between a radiation fin and a radiation fin 5 Fixing member 5a Horizontal part 5b Pressing claw part 5c Vertical part 5d Leg part 6 Press-fit groove 7 Rib 8 Printed wiring board 8a Mounting hole 9 Electronic component DESCRIPTION OF SYMBOLS 10 Radiator body 10a Radiation fin 10b Base part 10c Press fit groove 10d Rib 11 Fixing member 11a Horizontal part 11a 'Rear end part 11b Vertical part 11c Engagement claw part 11d Pressure contact claw part 12 Printed wiring board 12a Mounting hole 12b Back surface 13 Electronic component

Claims (1)

The horizontal portion (11a) of the fixing member (11) is press-fitted into a press-fitting groove (10c) formed in a base portion (10b) between a plurality of heat radiating fins (10a) formed in the radiator body (10). The back surface of the printed circuit board (12) when inserted into the mounting hole (12a) formed in the printed circuit board (12) at the tip of the vertical section (11b) that is bent and extends vertically from the section (11a) An engaging claw portion (11c) that engages with (12b) is formed , the rear end portion (11a ') of the horizontal portion (11a) of the fixing member (11) is slightly raised, and the width thereof is the press-fitting groove. Pressure claw portions (11d, 11d) which are equal to the width of (10c) and are in pressure contact with a pair of ribs (10d, 10d) formed on both sides of the press-fit groove (10c) on both sides of the rear end portion (11a '). Other than the rear end (11a ') of the horizontal portion (11a) The width radiator of the electronic component, characterized in that you are slightly narrower than the opposing distance of the pair of ribs (10d, 10d).

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