JPH09225562A - Structure for attaching pin on metal piece and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and firmly attach a pin on a metal piece of electric radiator, etc., improve the precision and reduce the cost. SOLUTION: A pin hole 22 is drilled on a pin seat 8a of soft metal, a pin 11 is inserted in the pin hole 22, after it is fitted, the pin seat 8a of the external circumference of the pin 11 is pressed with caulking and then the pin 11 is fixed on the pin seat 8a. A cylinder like punch 10b is inserted to the pin 11, at least one face of the pin seat 8a is pressed with caulking. Further, the pin seat 8a having a specified thickness is drilled by penetrating the pin hole 22, the pin 11 is protruded to the front and back both faces, by pressing the punches 10a, 10b to the butting direction from the protruded top ends on the front and back, caulking is executed from the front and back both sides of the pin seat 8a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure and method for mounting a pin on a metal piece such as a radiator plate for electrical equipment.

[0002]

2. Description of the Related Art Conventionally, a radiator as described above is shown in FIG.
It is known that an aluminum back plate 51 is fixed to a bellows-shaped cylindrical body 52, and a heating element a is fixed below the cylindrical body 52, as shown in FIG. A bracket-shaped leg seat 54 having leg pins 55 for inserting and fixing to the board is attached.

In order to attach the tubular body 52 to the back plate 51, a rail-shaped ridge 53 extending in the left-right direction is provided above the surface of the back plate 51, and the base end portion of the tubular body 52 has the above-mentioned structure. The crimping slit 50 is formed so as to fit with the protrusion 53, and the cylindrical surface 52 is fixed to the back plate 51 by pressing and deforming (caulking) the protruding surface of the protrusion 53.

Further, the leg seat 54 is pressed from the back surface of the back plate 51 and is formed so as to project toward the front surface side.
A pin hole 57 formed in one side of the leg seat 54 having an L-shaped cross section is fitted to the 56, and the projecting end of the pin 56 is caulked to be integrally fixed to the rear plate 51 side. 58 is a leg seat 5
4 positioning pins.

FIG. 5 (B) shows a leg seat 54 which is bent toward the rear plate 51, and a leg pin 55 with a leg plate 55a is integrally fixed to the leg seat 54 by caulking.

[0006]

However, in the above-mentioned prior art, it is necessary to punch the leg pin itself as a separate component for manufacturing the leg pin or the like which is mass-produced particularly in the field of electric radiators. In addition, the cost becomes high, and the punched product has a problem that the fitting with the pin hole to be inserted is incorrect.

[0007]

The radiator of the present invention for solving the above problems is, firstly, a pin seat 8a made of a soft metal.
It is characterized in that the pin 11 is inserted into and fitted into the pin hole 22 drilled in the pin 11 and the outer peripheral position of the pin 11 of the pin seat 8a is pressed and deformed to thereby vertically fix the pin 11 to the pin seat 8a. .

Second, the pin hole 2 is formed in the pin seat 8a made of soft metal.
2 is bored, the pin 11 is inserted and fitted in the pin hole 22, and then the pin seat 8a on the outer periphery of the pin 11 is pressed and caulked to fix the pin 11 to the pin seat. .

Thirdly, a cylindrical punch 10b is inserted into the pin 11, and at least one surface of the pin seat 8a is pressed and crimped by the end surface of the punch 10b.

Fourthly, a pin hole 22 is formed by penetrating a pin seat 8a having a predetermined thickness so that the pin 11 is projected on both front and back surfaces of the pin seat 8a, and the punch 10a is protruded from the projecting ends of the front and back surfaces of the pin 11. , 10b are pressed in the abutting direction to crimp the pin seat 8a from both front and back sides.

Fifth, the pin seat 8a is a leg seat 8 for mounting the radiator for electrical equipment on the circuit board 28.

Sixth, the pin seat is the metal heat dissipation board 31 fixed along the circuit board 28, and the pin is the heat dissipation board 3
It is characterized in that it is a radiating pin 11 'which is erected at 1.

[0013]

1 to 4 show one embodiment of a radiator, in which the entire radiator 1 is one thin wall (for example, 1 m).
The back plate 2 is a press-formed aluminum plate of m).
Both left and right ends of the are bent to the front side to form a tubular portion 3 in the vertical direction. Then, the peripheral wall end side of the tubular portion 3 forms a valley-shaped folded-back portion 4 along the front side of the back plate 2, and the back side of the folded-back portion 4 extends so as to contact the surface of the back plate 2. Further, the left and right folding ends 6 are the folding portions 4
Is erected on the front side on the inner side of, and a vertical groove portion is formed between the both with a constant interval.

Side plates 7 separated from the tubular portion 3 are bent and erected toward the front at the left and right ends below the tubular portion 3 of the rear plate 2, and the rear plate 2 below the side plates 7 stands upright. Leg seats 8 having an L-shaped cross section when viewed from the front are integrally formed by bending at the left and right ends, and pin seats 8a that project in both sides of the radiator 1 are formed.

Below the tubular portion 3 and the folded end 6, a mounting space 9 for the heating element a and the like surrounded by the side plate 7 and the leg seat 8 from both sides is formed, and the pin seat 8a is vertically mounted. A pin 11 penetrating through and extending to the lower surface side is inserted and fixed as a leg for inserting a circuit board.

Slits 12a and 12b are formed in the peripheral wall of the cylindrical portion 3 and the folded-back end 6 at positions where the vertical height is divided into approximately three equal parts.
Are formed, and the slits are configured to improve heat dissipation characteristics. The heating element a may be fixed to a screw hole 13 formed in the back plate 2 with a screw. However, as shown in FIG. It is also possible to elastically press and fix the plate springs 14 with both ends inserted and locked.

In order to insert and fix the leg pin 11 in the pin seat 8a, the pin 11 is fitted into the pin hole 22 formed in the pin seat 8a as shown in FIGS. The pin 11
From the upper and lower (front and back) protruding ends of the cylindrical punch (punch) 1
0a and 10b are extrapolated, and the punches 10a and 1 are
0b is pressed in the butting direction by a press or the like.

As a result, ring-shaped irregularities corresponding to the shape of the tip surfaces of the punches 10a and 10b are formed on the front and back outer peripheral positions of the pin 11 of the pin seat 8a, and the plate meat around the pin is compressed to move the pin 11 from the outer periphery. A crimped portion 17 for pressing and fixing is formed. It is possible to perform the caulking process using one punch and form the caulking portion 17 only on one surface of the pin seat 8a, but the pin fixing is more stable by the illustrated method.

The rear side of the folded-back portion 4 inside the tubular portion 3 is not only in contact with the front surface of the rear plate 2 but is also integrally fixed in the fixing portion 18 in this example. The fixing portion 18 has a concave portion 23a as shown in FIG.
The back plate 2 and the folded-back part 4 are placed on the upper plate 3 as a receiving plate and a contact plate, and a punch (punch) 24 having a punch-out part 24a at the tip is lowered from above the recess 23a to press both plates. It is formed by co-caulking.

In this method, the receiving plate (2) and the contact plate (4) are left and right (or up and down) due to the unevenness of the punch 24 and the receiving die 23.
The receiving portion 2a and the fitting portion 4a are formed in a state where only the both sides are cut out and overlapped with each other to be in a half-blanked state.
Is press-fitted into the punching hole 2b on the receiving plate (2) side and both are integrally fixed by caulking.

In addition, the radiator 1 can be fixed by attaching its back side to the surface of another substrate 21 as shown by the phantom line in FIG. 2, and in this case, the caulking pin 56 of FIG. It is possible to form the fixing portion 19 by projecting the one corresponding to the above, fitting this into the pin hole of the back plate 2 and caulking and fixing the projecting end. In this case, it is desirable that no protrusion is formed on the back surface of the back plate 2.

FIG. 6 shows another example of the radiator 1. In this example, the cylindrical portion 3 with the slits 12a is formed on both left and right sides of the back plate 2 in common with the above example, but the following points are provided. There are differences in.

That is, in this example, the folded-back portion 4, which is the end of the peripheral wall of the tubular portion 3, is not brought close to or fixed to the front surface of the back plate 2,
A C-shaped tubular portion is formed, and the inner end portion of the folded-back portion 4 is bent and formed so as to further bulge to the front side.
It is 6.

Between the pressing portion 26 and the back plate 2,
A mounting space 9 for a heating element having a trapezoidal plan view or a circumferential wall bent in an arc shape is formed, and a heating element a is inserted into the mounting space 9 from below, and is held elastically and in a hug shape. It is a structure. Further, rectangular locking holes 27 corresponding to the left and right sides are formed in a window shape in the left and right pressing portions 26, and the left and right corners on the front side of the rectangular parallelepiped heating element a are locked in the locking holes 27, thereby vertically It has a structure that both movement and lateral movement are restricted.

The other parts indicated by the same reference numerals as those used in FIGS. 1 to 4 have the same functions as those of the above-mentioned example, and the description thereof will be omitted.

In FIG. 7, in order to promote heat dissipation of the heating element a mounted on the circuit board 28, a heat dissipation board 31 made of an aluminum plate or the like is laid on the upper surface of the heat dissipation element 31 in parallel with the pins 11 etc. A large number of heat dissipation pins 1 made of aluminum or copper
1'is vertically pierced and vertically fixed.

The pins 11 and 11 'are shown in FIGS.
4, which is fixed by caulking by the same method as in FIG. In this example, the heat radiating board 31 and the pins 11 'radiate heat from the lower heating element a, and the board 31 also serves as a dustproof cover and protects electrical components such as the heating element a.

[0028]

According to the present invention configured as described above, the work of fixing the pin to the pin seat is easy, and
Since both the pin and the pin hole have a circular cross section, they are advantageous in terms of workability and cost, can be accurately machined and assembled, and have excellent pin fixability.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a radiator according to the present invention.

2A and 2B are a front view and a side view of a radiator.

3A to 3C are enlarged cross-sectional views showing a pin mounting structure and method.

4A and 4B are enlarged cross-sectional views of a side surface and a front surface showing a structure of co-staking of metal plates.

5A and 5B are perspective views showing a conventional radiator and leg pin structure.

6A to 6C are a perspective view, a plan sectional view, and a vertical sectional view showing a radiator of a different embodiment of the present invention.

FIG. 7 is a perspective view showing another application example of the pin fixing structure.

[Explanation of symbols]

 1 Heat Sink 2 Back Plate 3 Cylindrical Part 4 Folding Part 6 Folding End 11 Pin 11 'Pin 17 Crimping Part 19 Mounting Space 22 Pin Hole 26 Pressing End 27 Locking Hole 28 Circuit Board 31 Radiating Board a Heating Element

Claims (6)

[Claims] 1. A pin (11) is inserted and fitted into a pin hole (22) formed in a pin seat (8a) made of a soft metal, and the outer peripheral position of the pin (11) of the pin seat (8a) is pressed. A pin mounting structure for a metal piece in which the pin (11) is erected and fixed to the pin seat (8a) by being deformed. 2. The pin seat (8a) made of a soft metal is provided with a pin hole (22), the pin (11) is inserted into the pin hole (22) and fitted, and then the outer periphery of the pin (11). A method for attaching a pin to a metal piece, which comprises fixing the pin (11) to the pin seat by pressing and crimping the pin seat (8a). 3. A cylindrical punch (10b) for the pin (11).
Insert the pin seat (8a) at the end face of the punch (10b).
3. A method of attaching a pin to a metal piece according to claim 2, wherein at least one surface of the above is pressed and crimped. 4. A pin seat (8a) having a predetermined thickness is formed by penetrating a pin hole (22) so as to project the pin (11) on both the front and back surfaces of the pin seat (8a). ) Punches (10a), (10
The method for attaching a pin to a metal piece according to claim 2 or 3, wherein caulking is performed from both front and back sides of the pin seat (8a) by pressing b) in the butting direction. 5. The pin seat (8a) is a leg seat (8) for mounting the radiator for electrical equipment on a circuit board (28).
Or the method of attaching the pin to the metal piece of 4. 6. The pin seat is a metal heat dissipation board (31) fixed along the circuit board (28), and the pin is a heat dissipation pin (11 ′) provided upright on the heat dissipation board (31). A method for attaching a pin to the metal piece according to claim 2, 3 or 4.