JP2002009465A - Electronic component fixing structure and fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic component fixing structure which can reliably fix a plurality of electronic components to a chassis through simple works. SOLUTION: In an electronic component fixing structure 1 for fixing electronic components 3 with use of a chassis 23 and an electronic component fixing fitting 7, the fitting 7 has resilient pieces 9 for pushing the components 3 against the chassis 23 and a pair of engagement pieces 19 for fixing of the fitting 7 to the chassis 23, the chassis 23 has parts 27 to be engaged by the engagement pieces 19. Since the fitting 7 can be reliably fixed to the chassis 23 without using any fixing means such as screw, there can be realized an electronic component fixing structure 1 which can reliably fix a plurality of electronic components 3 to the chassis 3 through simple works.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic component fixing structure for fixing an electronic component to a mounting surface of a chassis or the like using an electronic component fixing tool, and more particularly, to mounting a plurality of electronic components to a chassis. The present invention relates to an electronic component fixing structure that facilitates the above.

[0002]

2. Description of the Related Art Electronic components such as thermistors and transistors are often electrically connected to a circuit on a substrate in order to prevent a decrease in efficiency or a malfunction due to heat generated by the electronic components. Is thermally coupled to a chassis or the like having the above function, and the heat is dissipated.

[0003] In order to enhance the efficiency of heat radiation by strengthening the thermal coupling with the chassis and the like, these electronic parts are generally provided with a screw-type fixing bracket 3 as shown in FIG.
3 and a clip-type fixture 39 as shown in FIG.

The screw-type fixing bracket 33 is shown in FIG.
As shown in (c), a steel plate such as a rolled steel plate is bent into a substantially L-shaped vertical section, and a screw hole for fixing the screw-type fixing bracket 33 to the chassis is provided at a substantially central portion of one surface. A protrusion 35 is provided on the end face of the other surface to engage with the concave portion 26 provided in the chassis 23 to prevent a positional shift between the screw-type fixing bracket 33 and the chassis 23.

When the electronic component 3 mounted on the substrate 31 is pressed and fixed to the chassis 23 by using the screw-type fixing bracket 33, the electronic component 3 is fixed to the chassis 23 by a screw as shown in FIG. It is clamped by the stopper type fixing bracket 33 and is pressed and fixed to the chassis 23 by the tightening force of the screw 37.

[0006] The clip-type fixing bracket 39 is shown in FIG.
As shown in (a), a steel plate such as stainless steel for a spring is bent into a substantially U-shape.

When the electronic component 3 mounted on the substrate 31 is pressed and fixed to the chassis 23 by using the clip-type fixing bracket 39, the electronic component 3 is clipped as shown in FIG. The clip 39 is pressed and fixed to the chassis 23 by the restoring force of the elastic deformation of the clip-type fixing bracket 39.

[0008]

Since the screw-type fixing bracket 33 hardly deforms when the electronic component 3 is fixed, when the screw is strongly tightened, the electronic component 3 is hardly tightened.
Could be damaged. Further, this screw-type fixing bracket cannot securely fix three or more electronic components. Further, when two electronic components having a height difference are fixed by the screw-type fixing bracket 33, there is a problem that a difference occurs in the fixing adhesion between the two components.

On the other hand, the clip-type fixing bracket has a structure in which the electronic component 3 is pressed and fixed by the restoring force of its own elastic deformation.
The force greater than the restoring force of the clip type fixing bracket 39 is applied to the electronic component 3
It does not take on.

However, this clip-type fixing bracket 39 is
As described above, since both the electronic component 3 and the chassis 23 are sandwiched, a part of the clip-type fixing bracket 39 protrudes outside the end surface of the chassis 23, so that the end surface of the chassis 23 is flattened. Could not be.

When the clip-type fixing bracket 39 is used, since the depth from the end face of the chassis 23 to the fixing position of the electronic component 3 is limited, the depth of FIG. ) Is provided,
The position of the clip-type fixture 39 must be adjusted.

Further, since the clip-type fixing bracket 39 has a structure in which only one electronic component can be fixed per fixing bracket, the number of components increases, which causes an increase in cost.

In view of the above problems, the present invention provides an electronic component fixing structure using an electronic component fixing tool having a simple structure and capable of efficiently pressing and fixing a plurality of electronic components to a chassis. The purpose is to:

[0014]

In order to achieve the above object, an electronic component fixing structure of the present invention uses an electronic component fixing tool which engages with a pair of locked portions provided on a mounting surface of a chassis or the like. An electronic component fixing structure for pressing and fixing the electronic component to a chassis or the like, wherein the electronic component fixing tool is provided with at least one elastic piece for pressing the electronic component toward a mounting surface and the elastic piece integrally provided. And a pair of locking pieces provided integrally with both ends of the base, extending in substantially the same direction as the elastic pieces, and respectively engaging with a pair of locked parts provided on the mounting surface. , And the locking piece is locked by the pair of locked portions.

According to the above configuration, it is possible to press and fix a plurality of electronic components to the mounting surface with a uniform or different fixed adhesion force with a simple structure.

Further, the pair of locking pieces of the electronic component fixing device can be deformed only in the horizontal direction of the mounting surface, and the elastic pieces can be deformed only in the vertical direction of the mounting surface. Is preferred.

[0017] Further, the base portion may be arranged with respect to the mounting surface.
A longitudinal section including a plate-like side surface located substantially vertically, and a plate-like upper surface extending substantially perpendicularly from an upper edge of the side surface, and including the elastic piece and the base. The surface is approximately L
It is preferable that the electronic component fixing device is formed in a character shape, and by using such a structure, the electronic component fixing tool can be securely fixed to the locked portion.

It is preferable that the locking piece is provided substantially at right angles to a side surface of the base.

Further, the distance between the base and the contact point where the locking piece contacts the locked part is shorter than the distance between the base and the contact point where the elastic piece contacts the electronic component. Accordingly, a couple in the direction toward the chassis is generated at the base portion, and the electronic component fixture can be more securely fixed to the chassis.

Preferably, the electronic component fixing member is formed of a metal plate such as stainless steel for a spring.

Other objects and effects of the present invention will become more apparent from the following description of embodiments with reference to the drawings.

[0022]

1 to 3 are a top view, a rear view, and a side view, respectively, showing the entire structure of an electronic component fixing structure according to the present invention, and FIGS. FIG. 3 is a top view, a front view, and a side view of an electronic component fixing tool used in the electronic component fixing structure of the present invention. FIG.
6 is a modified view of the locking piece of the electronic component fixing structure of the present invention, FIG.
FIG. 4 is a view showing another embodiment of the electronic component fixing structure of the present invention.

As shown in FIGS. 1 to 3, an electronic component fixing structure 1 according to the present invention has an EFT (field effect transistor).
Is a structure for pressing and fixing the electronic component 3 such as the electronic component 3 to the chassis 23 as a mounting surface by the electronic component fixing tool 7,
The electronic component 3 includes the electronic component fixture 7 and the chassis 23.
Is pressed and fixed to the chassis 23. In this structure, the electronic component 3 is connected to the circuit on the substrate 31 by the terminal 5.

As shown in FIG. 4 (a), the electronic component fixing device 7 is provided with a pair of elastic pieces 9, 9 for fixing the electronic component 3 and the elastic pieces 9, 9 integrally provided. Base 1
3 and a pair of locking pieces 19 extending from both ends of the base portion 13 in substantially the same direction as the elastic pieces 9 and 9 for fixing the electronic component fixture 7 to the chassis 23. As shown in FIG. 4C, a vertical section including the elastic piece 9 and the base 13 is formed so as to be substantially L-shaped.

More specifically, the base 13 is
As shown in FIG. 4C, a side surface portion 15 disposed substantially at right angles to a mounting surface of the chassis 23,
And an upper surface 17 provided substantially vertically and integrally therewith.

The left and right end surfaces of the side surface portion 15 are shown in FIG.
As shown in (a) and (c), the locking piece 19 for fixing the electronic component fixture 7 to the chassis 23 is
And are provided integrally. Due to its shape, the locking piece 19 has a structure having elasticity in a direction horizontal to the mounting surface and rigidity in a direction perpendicular to the mounting surface.

As shown in FIG. 4 (a), the elastic piece 9 is provided integrally with the upper surface 17 of the base portion 13 to provide elasticity in a direction perpendicular to the mounting surface and a direction parallel to the mounting surface. It is a substantially rectangular member having rigidity. The connection between the elastic piece 9 and the upper surface 17 is bent so that the elastic piece 9 is inclined toward the chassis 23 with respect to the upper surface 17 as shown in FIG. In addition, by adjusting the angle of the bending process or changing the thickness of the elastic piece 9, it is possible to change the fixed adhesion force of the electronic component 3 to the chassis 23, and to attach electronic components of various shapes to the chassis, respectively. In this case, it is possible to make contact with an optimum fixed adhesion force.

The tip of the elastic piece 9 is shown in FIG.
As shown in FIG. 2, the contact portion 11 is formed to bend upward, thereby forming the contact portion 11 that contacts the electronic component 3.

The locking piece 19 is shown in FIGS. 4 (a) and 4 (c).
As shown in FIG. 3, the member is provided integrally with the side surface portion 15. The connecting portion between the locking piece 19 and the side surface 15 is shown in FIG.
As shown in (a), the locking piece 19 and the side face 15 are bent so as to be in a substantially vertical positional relationship, and change in the horizontal direction parallel to the chassis 23, but are rigid in the vertical direction. Is to be provided. Further, at the tip of the locking piece 19, a locked portion 27 provided on a chassis 23 described later is provided.
And a locking projection 21 for fixing the electronic component fixing tool 7 to the chassis 23 is provided. This locking projection 2
As shown in FIG. 4 (b), the protrusion 1 is formed by bending a projection formed at the front end of the locking piece 19 on the chassis side into a hook shape in the direction of the element. When the electronic component fixing device 7 is attached to the chassis 23, as shown in FIG. 2, the tip of the locking projection 21 comes into contact with the locked portion 27 of the chassis 23.

The chassis 23 is made of a highly conductive metal material such as iron or aluminum. As shown in FIGS. 1 to 3, the chassis 23 is used to mount a board 31 to which the electronic components 3 are connected. Part 29 and an opening 25 for accommodating the locking projection 21 of the electronic component fixture 7.
And a locked portion 27 that engages with the locking projection 21 protruding from the edge of the opening 25.

That is, the locked portion 27 is provided with a substantially U-shaped opening 25 in the chassis 23, and a projection projecting from the edge of the opening 25 into the inside of the opening 25 is formed as shown in FIG.
As shown in (1), it is formed by bending the mounting surface side of the electronic component 3.

In the present embodiment, the distance A (see FIG. 4A) between the contact point where the elastic piece 9 contacts the electronic component 3 and the side surface 15 is determined by the fact that the locking projection 21 is B between the contact point contacting the side and the side surface portion 15 (see FIG. 4A)
It is preferable to design the electronic component fixing tool 7 such that when the electronic component fixing tool 7 is attached to the chassis 23, the couple M shown by an arrow in FIG. Therefore, it is possible to prevent the base 13 from rising from the chassis 23.

The electronic component fixture 7 of the present embodiment is provided with two elastic pieces 9 and two electronic components 3.
However, the present invention is not limited to this embodiment, and it is possible to fix two or more electronic components by increasing the number of elastic pieces of the electronic component fixture.

In this embodiment, the locking pieces 19, 19
By forming the locking projections 21, 21 provided only on the distal end portions of the locking pieces 19, 19, both of the locking pieces 19, 19 have a structure having elasticity. One of the locking pieces 19, 19 may be enlarged as shown in FIG. 6 to have a structure having rigidity in the horizontal direction.

Hereinafter, a method of fixing the electronic component 3 by the electronic component fixing structure 1 according to the present embodiment will be described in detail.

(1) The electronic component 3 is placed on the chassis 23. (2) The electronic component fixture 7 is placed on the electronic component 3. (3) An external force in the direction indicated by the arrow in the figure is applied to the locking pieces 19 of the electronic component fixing tool 7 to bend toward the elastic piece 9. (4) After the locking piece 19 is pushed into the chassis 23 side in the state of (3), the external force is removed, so that the locking projection 2 is formed.
1 is positioned below the locked portion 27 of the chassis 23.

When a plurality of electronic components having a height difference are fixed, the bending angle of the elastic piece 9 of the electronic component fixing tool 7 is changed in advance so that each electronic component can be uniformly fixed and adhered. It is possible to fix with.

Further, by providing a heat conductive sheet or the like between the electronic component 3 and the chassis 23, the heat radiation and insulation of the electronic component 3 can be efficiently performed.

Further, in this embodiment, the electronic component 3
Although provided on the chassis 23 having a heat dissipation function, the present invention is not limited to this embodiment, and the electronic components can be attached to a metal plate member such as a heat sink.

In addition, if the engaging projection 21 is shaped so as to be able to regulate the movement in the direction perpendicular to the mounting surface of the engaging piece 19 by engaging with the engaged portion 27, the present invention is applicable. Because of the structure described above, it is possible to change the shape into various shapes in addition to the hook shape as in the present embodiment.

Lastly, it is needless to say that the present invention is not limited to the above-described embodiment, and various changes and improvements can be made within the scope described in the claims. For example, the advantages of the present invention can be enjoyed even when the electronic component fixing device of the present invention is formed of other metal, hard resin, or the like, instead of stainless steel for a spring.

[0042]

As described above, according to the present invention, a plurality of electronic components can be easily and one-timely worked by the elastic deformation of the electronic component fixture without using other components such as screws. It is possible to securely press and fix to the mounting surface of, and even when fixing multiple electronic components with a difference in height, each electronic component is pressed against the mounting surface of the chassis etc. with uniform fixing and adhesion force An electronic component fixing structure that can be fixed is realized.

[Brief description of the drawings]

FIG. 1 is a plan view showing the entire structure of an electronic component fixing structure according to the present invention.

FIG. 2 is a rear view showing the entire structure of the electronic component fixing structure of the present invention.

FIG. 3 is a side view showing the entire structure of the electronic component fixing structure of the present invention.

FIGS. 4A to 4C are a plan view, a front view, and a side view of an electronic component fixing tool used in the electronic component fixing structure of the present invention.

FIG. 5 is a modified view of a locking piece of the electronic component fixing tool used in the electronic component fixing structure of the present invention.

FIG. 6 is another embodiment of the electronic component fixing tool used in the electronic component fixing structure of the present invention.

FIGS. 7A to 7C are a plan view, a rear view, and a side view of an electronic component fixing structure using a conventional screw-fixed electronic component fixing tool, respectively.

FIGS. 8A to 8C are a front view, a rear view, and a side view of an electronic component fixing structure using a conventional clip-type electronic component fixing tool, respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic component fixing structure 3 Electronic component 5 Terminal 7 Electronic component fixing tool 9 Elastic piece 11 Contact part 13 Base 15 Side face part 17 Upper surface part 19 Locking piece 21 Locking projection 23 Chassis 25 Opening 26 Depression 27 Locked part 29 mounting portion 31 substrate 33 screw-type fixing bracket 35 projection 37 screw 39 clip-type fixing bracket

Claims (7)

[Claims] An electronic component fixing structure for pressing and fixing an electronic component to a chassis or the like by using an electronic component fixing tool that engages with a pair of locked portions provided on a mounting surface of a chassis or the like. The component fixing tool is provided with at least one elastic piece for pressing the electronic component toward the mounting surface, a base provided with the elastic piece integrally, and provided integrally with both ends of the base, and substantially similar to the elastic piece. A pair of locking pieces extending in the same direction and respectively engaging with a pair of locked parts provided on the mounting surface, wherein the locking pieces are the pair of locked parts. An electronic component fixing structure characterized by being locked by: 2. The pair of locking pieces of the electronic component fixing device can be deformed only in the horizontal direction of the mounting surface, and the elastic piece can be deformed only in the vertical direction of the mounting surface. The electronic component fixing structure according to claim 1, wherein: 3. The base has a plate-like side surface located substantially perpendicular to the mounting surface, and a plate-like upper surface extending substantially perpendicularly from an upper edge of the side surface. The vertical section including the elastic piece and the base is formed to be substantially L-shaped.
Electronic component fixing structure according to any one of the above. 4. The electronic component fixing structure according to claim 1, wherein the locking piece is provided substantially at right angles to a side surface of the base. 5. A distance between a contact point where the locking piece contacts the locked portion and the base is shorter than a distance between the contact point where the elastic piece contacts the electronic component and the base. The electronic component fixing structure according to any one of claims 1 to 4, wherein: 6. The electronic component fixing device according to claim 1, wherein the electronic component fixing device is formed of stainless steel for a spring.
6. The electronic component fixing structure according to any one of claims 5 to 5. 7. An at least one elastic piece for pressing an electronic component against a mounting surface such as a chassis, a base provided integrally with the elastic piece, and integrally provided at both ends of the base,
And a pair of locking pieces that extend in substantially the same direction as the elastic piece and engage with a pair of locked portions provided on the mounting surface.