JPH06203624A - Vibration resistant electronic circuit block - Google Patents

Abstract

PURPOSE:To provide a vibration resistant electronic circuit block capable of surely preventing the breakage of the foot of an electronic part, due to vibration by providing a support member for supporting the free end part of the electronic part on a substrate to mount the electronic part. CONSTITUTION:Electronic parts 3 such as chalk coils 6-9, capacitors 10, 11, and HIC 12, 12 are mounted on a board and a support member 2 for supporting the free end parts of the electronic parts 3 is fixed onto the board 1. As the support member 2, a plate about 2-3mm thick consisting of a plastic material such as vinyl chloride resin is used, and round bar pins 5 about 5mm in diameter are provided on four corners, and fixed to the board 1 by an adhesive. Thus, even when an electronic circuit block is vibrated, the vibration of the electronic part 3 is suppressed, the breakage of the pin 5 of the electronic part 3 can be surely prevented, and the generation of a circuit failure can be prevented. For example, the resonance frequency of the electronic part is raised to the frequency 2 times or more, compared with the electronic part 3 never supported by the support member 2, and the vibration is lowered to about 1/3 or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration-proof electronic circuit block.

[0002]

2. Description of the Related Art A conventional example is shown in FIGS. That is, this vibration-proof electronic circuit block is used for the electronic component 50.
The electronic component 50 was fixed to the substrate 51 by directly applying the adhesive 52 to the substrate 51 on which the electronic component 50 was mounted. In another conventional example shown in FIG. 14, a splint 53 is erected on the side surface of the electronic component 50 and the electronic component 50 is adhered thereto.

[0003]

However, in the vibration-proof electronic circuit block, the vibration of the electronic circuit block causes the adhesive 52 to be peeled off or the splint 53 to fall, and the leg of the electronic component 50 to be broken. There was a failure and the vibration resistance was not sufficient. Therefore, an object of the present invention is to provide a vibration-proof electronic circuit block capable of preventing breakage of a leg of an electronic component due to vibration.

[0004]

According to another aspect of the present invention, there is provided a vibration-proof electronic circuit block comprising a substrate on which electronic components are mounted, and a support member fixed to the substrate to support a free end of the electronic components. It is a thing. According to a second aspect of the present invention, in the vibration-proof electronic circuit block according to the first aspect, the support member is a flat plate having a plurality of fitting holes into which the electronic component is fitted.

A vibration-proof electronic circuit block according to a third aspect of the present invention is the vibration-proof electronic circuit block according to the first aspect, including a circuit storage box for storing the substrate, and a lid for closing the circuit storage box, wherein the support member is the lid. The spring is provided on the back surface and fits into the electronic component.
The vibration-proof electronic circuit block according to claim 4 has the circuit storage box for storing the substrate according to claim 1, and a lid for closing the circuit storage box, and the support member is provided on a back surface of the lid. The vertical plate is provided and has a plurality of recesses cut out at its lower end for fitting with the electronic component.

[0006]

According to the vibration-proof electronic circuit block of claim 1,
Since the electronic components are mounted on the board and the free ends of the electronic components are supported by the support member that is fixed to the board, vibration of the electronic components is suppressed even if the electronic circuit block vibrates, and the legs of the electronic components are securely broken. Therefore, it is possible to prevent the occurrence of circuit failure.

According to the vibration-proof electronic circuit block of claim 2, since the support member in claim 1 is a flat plate having a plurality of fitting holes for fitting the electronic parts, the same action as in claim 1 is achieved. is there. According to a third aspect of the present invention, there is provided a vibration-proof electronic circuit block according to the first aspect, further comprising a circuit storage box for storing the board, and a lid for closing the circuit storage box, wherein the support member has a back surface of the lid. It has the same function as that of claim 1 because it is formed of a spring that is provided on the electronic component and is fitted to the electronic component.

According to a fourth aspect of the present invention, there is provided a vibration-proof electronic circuit block according to the first aspect, further comprising a circuit storage box for storing the circuit board and a lid for closing the circuit storage box. Since the vertical plate is vertically provided on the back surface of the lid and has a plurality of recesses formed in the lower end portion to be fitted to the electronic component, the same action as in claim 1 is obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, this on-vehicle vibration-proof electronic circuit block has the substrate 1 and the support member 2. Board 1
Mounts the electronic component 3. The board 1 of the embodiment is a printed board, and the electronic component 3 is mounted on the board 1 so as to form a predetermined electronic circuit for mounting on a vehicle, for example. In the embodiment, 6 to 9 are choke coils, 10 and 11 are capacitors, and 12 and 13 are HICs.

The support member 2 is fixed to the substrate 1 and supports the free end of the electronic component 3. In the embodiment, a flat plate, that is, a template, having a plurality of fitting holes 4 for fitting to a large-sized electronic component that is easily affected by vibration is used as the template. The supporting member 2 is made of a plastic material such as vinyl chloride or ABS resin and has a thickness of about 2 to 3 mm. Feet 5 are provided and fixed to the substrate 1 with a silicone adhesive. A gap of about 0.5 mm is formed between the electronic component 3 and the fitting hole 4. However, in order to prevent a decrease in the degree of adhesion, an adhesive is injected into this gap to fit the electronic component 3 into the fitting hole. 4 may be adhered.

According to this embodiment, the electronic component 3 is mounted on the substrate 1.
The electronic component 3 is mounted on the substrate 1 by the support member 2 fixed to the substrate 1.
Since the free end portion of the electronic component is supported, the vibration of the electronic component 3 is suppressed even if the electronic circuit block vibrates, and the breakage of the leg 5 of the electronic component 3 can be reliably prevented, and the occurrence of circuit failure is prevented. You can For example, the resonance frequency of the electronic component 3 is considered to increase to twice or more the frequency of the electronic component 3 not supported by the support member 2, and the vibration is reduced to about 1/3 or less.

A second embodiment of the present invention is shown in FIGS.
Shown in. That is, this vibration-proof electronic circuit block has the circuit storage box 16 for storing the substrate 1 and the lid 14 for closing the circuit storage box 16 in the first embodiment, and the support member 2 has the lid 14. It is composed of a spring provided on the back surface and fitted to the electronic component 3. The size of the support member 2 varies depending on the size of the electronic component 3 to be sandwiched, but as shown in FIG. 6, two spring steel plates of about 5 × 50 mm are each bent into a substantially S shape to form an intermediate portion. Connected with screws 19, a pair of mounting holes 18 at one end 15
And the holding piece 21 is formed on the other end side, and the tip 2
No. 0 is bent outward so that the electronic component 3 can be smoothly sandwiched without being caught by the electronic component 3. Then, it is fixed to the back surface of the lid 14 with screws (not shown) through the mounting holes 18. The support member 2 can be inserted into the electronic component 3 in a sandwiched state, and after the insertion, there must be a fit enough to reinforce and support the electronic component 3 by the spring force generated by the insertion. Is about -5 mm of the outer diameter of the part. The lid 14 is formed into a size of 250 × 100 mm by forging aluminum. The circuit storage box 16 has the substrate 1 on the inner bottom.
The size of the lid 14 is set so that the circuit storage box 16 can be stored.

According to this embodiment, since the electronic component 3 is elastically sandwiched by the support member 2, lateral vibration of the electronic component 3 is suppressed, and the same effect as the first embodiment is obtained. FIG. 7 shows a modification of this embodiment, which is a circuit storage box 16
Has a low height and the lid 14 has a box shape, and the substrate 1 is attached to the circuit storage box 16 by the screw 22.
4, the support member 2 is provided on the inner top portion of the cover 4, and the lid 14 has screws 21.
It is fixed to the circuit storage box 16 by.

A third embodiment of the present invention is shown in FIGS.
It shows in 0. That is, this vibration-proof electronic circuit block is
In the first embodiment, a circuit storage box 16 for storing the substrate 1 is provided, and a lid 14 for closing the circuit storage box 16 is provided. The support member 2 is vertically provided on the back surface of the lid 14 and has an electronic lower end portion. A vertical plate, for example, a template, in which a plurality of recesses 23 that fit into the component 3 are cut out, is formed. This supporting member 2 is made of the same material as that of the first embodiment, and the concave portion 23 has a vertical posture along the sectional shape when it is assumed that the substrate 1 is vertically cut as shown in FIGS. 9 and 10. It is formed on the lower edge of 2. The circuit storage box 16 and the lid 14 have the same structure as in the second embodiment, but two convex ridges 24 are provided on the back surface of the lid 14 and the upper end portion of the support member 2 is fitted in the groove formed between them. It is fixed with an adhesive. When a gap is formed between the electronic component 3 and the recess 23, an adhesive is injected into the gap to fix the electronic component 3.

According to this embodiment, since the support member 2 can suppress the vertical and horizontal vibrations of the electronic component 3,
There are the same effects as those of the first embodiment. FIG. 11 shows a modified example of this embodiment, in which convex ribs 24, 24 'are formed on the inner top and both sides of the box-shaped lid 14 similar to FIG. 7, and the support member 2 is slid in the groove between them. Fixed.

[0016]

According to the vibration-proof electronic circuit block of claim 1, since the electronic component is mounted on the substrate and the free end portion of the electronic component is supported by the supporting member fixed to the substrate, the electronic circuit block vibrates. However, there is an effect that vibration of the electronic component is suppressed, breakage of the leg of the electronic component can be reliably prevented, and occurrence of circuit failure can be prevented.

According to the vibration-proof electronic circuit block of claim 2, since the support member is a flat plate having a plurality of fitting holes for fitting with the electronic component in claim 1, the same effect as in claim 1 is obtained. is there. According to a third aspect of the present invention, there is provided a vibration-proof electronic circuit block according to the first aspect, further comprising a circuit storage box for storing the board, and a lid for closing the circuit storage box, wherein the support member has a back surface of the lid. Since it is constituted by a spring which is provided on the base and is fitted to the electronic component, it has the same effect as the first aspect.

According to a fourth aspect of the present invention, there is provided a vibration-proof electronic circuit block according to the first aspect, further comprising a circuit storage box for storing the substrate and a lid for closing the circuit storage box. Since the vertical plate is vertically provided on the back surface of the lid and has a plurality of recesses formed in the lower end portion for fitting with the electronic component, the vertical plate has the same effect as the first aspect.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a plan view of the supporting member.

FIG. 3 is an exploded perspective view before mounting a support member.

FIG. 4 is a side view of a holding state of an electronic component by a supporting member according to a second embodiment.

FIG. 5 is an explanatory view showing the grasped state in a plan view.

FIG. 6 is a perspective view of a support member.

FIG. 7 is a side view of a modified example with a lid removed.

FIG. 8 is a side view of the third embodiment with the circuit storage box removed.

FIG. 9 is a side view showing a state where the support member is separated from the electronic component.

FIG. 10 is an explanatory plan view of a state in which a support member is attached to an electronic component.

FIG. 11 is a cross-sectional view showing a state in which a support member is attached to a lid of a modified example.

FIG. 12 is a side view of a conventional example.

FIG. 13 is a perspective view thereof.

FIG. 14 is a perspective view showing a state in which an electronic component is supported by a splint.

[Explanation of symbols]

 1 substrate 2 support member 3 electronic component

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahiro Hagiwara 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (4)

[Claims] 1. A vibration-proof electronic circuit block comprising: a board on which an electronic component is mounted; and a support member fixed to the board to support a free end portion of the electronic component. 2. The vibration-proof electronic circuit block according to claim 1, wherein the support member is a flat plate having a plurality of fitting holes for fitting with the electronic component. 3. A circuit storage box for storing the substrate, and a lid for closing the circuit storage box, wherein the support member is a spring provided on the back surface of the lid and fitted to the electronic component. The vibration-proof electronic circuit block according to claim 1. 4. A circuit storage box for storing the substrate, and a lid for closing the circuit storage box are provided, and the support member is vertically provided on a back surface of the lid and fitted to the electronic component at a lower end thereof. The vibration-proof electronic circuit block according to claim 1, wherein the vibration-proof electronic circuit block is a vertical plate in which a plurality of recesses to be fitted are cut out.