JPH0888482A - Fixing structure of substrate - Google Patents

Abstract

PURPOSE: To make it possible to fix a substrate only with a main body of a case and a cover without using screws, etc., by forming at a specified place near a fringe section of the cover a holding piece which holds an edge section of the main body of the case with a folded piece and fixing the substrate between a supporting piece of the main body of the case and an edge of the holding piece. CONSTITUTION: A substrate 11 is inserted from an upper section of a case body 13 and then is mounted on a supporting piece 16 of the body 13. A cover 14 is put on the main 13 and an edge of the body 13 is inserted between a holding piece 15 of a holded piece 14a. By this method, the substrate 11 can be fixed between the edge of the holding piece 15 and the supporting piece 16 at the same time with fixing the cover 14 and the body 13. In this method, there is no need of using other connection members such as screws and the substrate 11 can be fixed only with the body 13 and the cover 14 and as a result the cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate fixing structure,
More specifically, the present invention relates to a board fixing structure in a housing that houses a board of an audio device or the like.

[0002]

2. Description of the Related Art FIG. 5 is a schematic cross-sectional view showing a fixing structure for a substrate of this type by a conventional screwing method.
Shows a substrate on which a large number of electronic components (not shown) are mounted. The substrate 11 is held in a casing 25, and the casing 25 is composed of a casing body 26 and a lid 27. A folding piece 27a is extended to the peripheral edge of the lid 27, and the vicinity of the peripheral edge of the lid 27 is provided. A holding piece 28 is formed by cutting and raising at a predetermined position, and the end portion of the housing body 26 is held in the gap between the folded piece 27a and the holding piece 28. A supporting piece 29 by cutting and raising for supporting the substrate 11 is projectingly provided at a predetermined position on the inner surface of the housing body 26, and a screw hole 29a is formed at a predetermined position of the supporting piece 29. Support piece 29
A screw hole 11b is formed at a predetermined portion of the substrate 11 facing the screw hole 29a.

In such a substrate fixing structure, the substrate 1
In order to fix the substrate 1, first, the board 11 is
Is inserted, the substrate 11 is placed on the support piece 29, and the support piece 2
9 screw holes 29a and the substrate 11 screw holes 11b screw 3
Screw 0. As a result, the substrate 11 is fixed to the support piece 29, in other words, fixed to the housing body 26. Next, the lid 27 is covered from above, and the end of the housing body 26 is inserted between the folded piece 27 a of the lid 27 and the sandwiching piece 28. At this time, the protrusion 28 formed on the sandwiching piece 28
The end of the housing body 26 is pressed by a. In this way, the board 11 is fixed to the housing body 26, and the lid 27 is attached to the housing body 26, so that the board 11 is fixed in the housing 25.

However, the fixing structure of the substrate having the above structure requires the screw 30, and the screw holes 11b and 29 are provided.
Since the step of forming a and the step of screwing are required, there is a problem that the cost becomes high.

Therefore, as shown in FIG. 6, a board fixing structure by a claw bending method is also adopted. Here, (a)
Shows a schematic sectional view of a fixing structure of a substrate by a claw bending method, and (b) shows a schematic enlarged perspective view of a portion A. Similar to FIG. 5, the substrate 11 is held in the housing 31, and the housing 31 includes a housing main body 32 and a lid 33, and the lid 33
A folding piece 33a is extended to the peripheral edge of the cover 33, and a holding piece 34 by cutting and raising is provided at a predetermined position near the peripheral edge of the lid 33.
Is formed, and the end portion of the housing body 32 is clamped in the gap between the folded piece 33a and the sandwiching piece 34 formed by cutting and raising. A supporting piece 35 by cutting and raising for supporting the substrate 11 is projectingly provided at a predetermined position on the inner surface of the housing body 32, and the tip side of the supporting piece 35 is bent toward the lid 33 side and the claw 35a is formed. Has been formed. The nail 3 is provided at a predetermined position on the substrate 11.
A slit 11a into which 5a is fitted is formed, and the claw 35a after the fitting is bent at a predetermined position. 6A and 6B show the state after the claw 35a is bent at a predetermined position.

In such a substrate fixing structure, the substrate 1
In order to fix 1, the substrate 11 is first placed from above the housing body 32.
Is inserted, the board 11 is placed so that the claws 35a of the support piece 35 are fitted in the slits 11a formed in the board 11, and then the fitted claws 35a are bent from a predetermined position. As a result, the substrate 11 is fixed to the support piece 35,
In other words, it will be fixed to the housing body 32. Next, the lid 33 is covered from above, and the folded piece 3 of the lid 33 is covered.
The end portion of the housing body 32 is inserted between the 3a and the sandwiching piece 34. At this time, the end portion of the housing main body 32 is pressed by the projection 34a formed on the holding piece 34. In this way, the board 11 is fixed to the housing body 32, and the lid 33 is attached to the housing body 32.
Will be fixed.

[0007]

However, in the above-mentioned substrate fixing structure, the support piece 35 is bent to make the nail 3
5a must be formed, and a nail bending step is also required when fixing the substrate 11, so there is a problem that there is a limit to cost reduction. Also, in order to disassemble, the bent claw 35a must be restored to a straight state,
Since it is difficult to disassemble and may be damaged from the bent portion, there is a problem that it is not suitable for reuse after finishing repairs and the like.

The present invention has been made in view of the above problems, and it is possible to reduce the cost of parts because no screws are required. Also, since the screwing work and the claw bending work are not required, the processing cost and the processing cost can be reduced. It is an object of the present invention to provide a substrate fixing structure that can be reduced in time and that can be easily disassembled and assembled during reuse.

[0009]

In order to achieve the above object, a substrate fixing structure according to the present invention is a substrate fixing structure for fixing a substrate in a casing composed of a casing body and a lid. While a supporting piece of the substrate is projected from a predetermined location on the inner surface of the housing body, a folding piece is extended from a peripheral edge of the lid, and a predetermined location near the peripheral edge of the lid is provided. A sandwiching piece that sandwiches the end of the housing body is formed between the folded piece and the substrate, and the substrate is fixed between the supporting piece and the tip of the sandwiching piece (1). ).

The substrate fixing structure according to the present invention is characterized in that, in the substrate fixing structure described in (1) above, an elastic member is attached to the substrate fixing surface of the support piece (2). .

Further, the board fixing structure according to the present invention is the board fixing structure according to the above (1) or (2), wherein a pressing member for pressing the board is formed at a predetermined position on the inner surface of the lid. It is characterized by (3).

The board fixing structure according to the present invention is the board fixing structure according to any one of the above (1), (2) and (3), which is fitted into a positioning hole formed in the board. A matching positioning piece is formed at a predetermined position on the tip of the support piece or the sandwiching piece (4).

[0013]

According to the substrate fixing structure (1) of the present invention,
In a substrate fixing structure for fixing a substrate in a casing including a casing main body and a lid, a supporting piece of the substrate is projected from a predetermined position on the inner surface of the casing main body, while a peripheral edge of the lid is provided. A folding piece is extended from the portion, and a holding piece for holding the end portion of the housing body is formed between the folding piece and a predetermined portion in the vicinity of the peripheral portion of the lid body. Since it is fixed between the supporting piece and the tip of the sandwiching piece, the substrate can be fixed only by the housing body and the lid without using other screws or the like, and the cost is reduced. Further, since it is not necessary to bend the claws or the like when fixing the board, the assembly time can be shortened. Further, when disassembling, by removing the lid body from the housing body, not only the lid body and the housing body but also the substrate can be removed, which facilitates disassembly at the time of repair.

Further, the substrate fixing structure according to the present invention (2)
According to the above, in the substrate fixing structure according to (1) above,
Since the elastic member is attached to the substrate fixing surface of the support piece,
The same action as the substrate fixing structure of the above (1) is obtained, and the rattling of the substrate at the time of fixing is absorbed by the elastic member, so that damage due to impact on the substrate can be reduced.

Further, the substrate fixing structure according to the present invention (3)
According to this, in the substrate fixing structure according to (1) or (2) above, since the pressing member that presses the substrate is formed at a predetermined position on the inner surface of the lid, the above-mentioned (1) and (2) The same action as the structure for fixing the substrate can be obtained, the pressing force of the pressing member always acts on the substrate, and since the supporting piece and the sandwiching piece are fixed, the rattling of the substrate can be surely suppressed. Become.

Further, a fixing structure for a substrate according to the present invention (4)
According to the above, in the substrate fixing structure according to any one of (1), (2), and (3) above, the positioning piece that fits into the positioning hole formed in the board is the supporting piece or the sandwiching piece. Since it is formed at a predetermined point on the tip, the above (1)
The same effects as those of the substrate fixing structure of (3) to (3) can be obtained, the arrangement of the substrates is limited, and the positioning of the substrates becomes easy.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a substrate fixing structure according to the present invention will be described below with reference to the drawings. FIG. 1 is a diagram schematically showing a fixing structure for a substrate according to the first embodiment, and 11 in the figure denotes a substrate. The substrate 11 is held in a housing 12, and the housing 12 is composed of a housing body 13 and a lid body 14. A folding piece 14a is extended to the peripheral edge portion of the lid body 14, and near the peripheral edge portion of the lid body 14. A holding piece 15 is formed by cutting and raising at a predetermined position, and the end portion of the housing body 13 is inserted into the gap between the folding piece 14 a and the holding piece 15. A support piece 16 for supporting the substrate 11 is provided at a predetermined position on the inner surface of the housing main body 13 so as to project.
The distance between the upper surface of 6 and the tip of the sandwiching piece 15 is set equal to the thickness of the substrate 11 or slightly shorter than the thickness of the substrate 11.

In such a substrate fixing structure, the substrate 1
In order to fix 1, the board 1
1 is placed, the substrate 11 is placed on the support piece 16 of the housing body 13, then the lid body 14 is placed over the housing body 13, and the housing body 15 is sandwiched between the sandwiching piece 15 and the folding piece 14a. Body 1
Insert the end of 3. As a result, the lid 14 and the housing body 13 are fixed, and at the same time, the substrate 11 is fixed between the tip end of the sandwiching piece 15 and the support piece 16.

As described above, according to the board fixing structure of the first embodiment, the housing main body 13 can be used without using other screws or the like.
The substrate 11 can be fixed only by the cover 14 and the cost can be reduced. Also, the substrate 11
Since it is not necessary to bend the claws and the like at the time of fixing, the assembling time can be shortened. Further, when disassembling, not only the lid body 14 and the housing body 13 but also the substrate 11 can be removed by removing the lid body 14 from the housing body 13, so that the disassembly at the time of repair can be easily performed. .

FIG. 2 is a view schematically showing a substrate fixing structure according to the second embodiment. Hereinafter, the same components as those in the first embodiment will be designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted. In the substrate fixing structure according to the second embodiment, an elastic member 17 such as a sponge is attached to the substrate 11 fixing surface on the support piece 16. The distance between the upper surface of the elastic member 17 and the tip of the folded piece 15 is equal to or slightly shorter than the thickness of the substrate 11,
The thickness of the elastic member 17 and the length of the sandwiching piece 15 are set.

When the substrate 11 is fixed in such a fixing structure of the substrate 11 as in the case of the first embodiment, the lid 14 and the housing body 13 are fixed, and at the same time the sandwiching piece 15 is fixed. And support piece 16 and elastic member 17
The substrate 11 is fixed by and.

As described above, according to the substrate fixing structure of the second embodiment, the same effect as in the first embodiment can be obtained, and the rattling of the substrate 11 at the time of fixing is fixed by the elastic member 17. As a result, the damage to the substrate 11 due to the impact can be reduced.

FIG. 3 is a diagram schematically showing a substrate fixing structure according to the third embodiment. Hereinafter, the same components as those in the first embodiment will be designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted. A folding piece 19a is extended on the peripheral portion of the lid body 19, and the pressing member 20 is provided at a predetermined position on the inner surface of the lid body 19.
Are formed by cutting and raising. The pressing member 2
The length of 0 is set to be slightly longer than the sandwiching piece 15.

When the substrate 11 is fixed in such a fixing structure of the substrate 11 as in the case of the first embodiment, the lid 19 and the housing body 13 are fixed, and at the same time the sandwiching piece 15 is fixed. And support piece 16 and pressing member 20
The substrate 11 is fixed by and.

As described above, according to the substrate fixing structure of the third embodiment, the same effect as that of the first embodiment can be obtained, and the pressing force of the pressing member 20 always acts on the substrate 11, It is possible to reliably suppress rattling of the substrate 11 when fixed.

In the substrate fixing structure of the third embodiment, the case where the elastic member 17 is not attached to the support piece 16 is shown, but the present invention is not limited to this and is not limited thereto. In this embodiment, the elastic member 17 may be attached to the support piece 16.

FIG. 4 is a diagram schematically showing a substrate fixing structure according to the fourth embodiment. Hereinafter, the same components as those in the first embodiment will be designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted. The substrate 4 is provided at a predetermined position on the inner surface of the housing body 23.
1, a support piece 22 for supporting 1 is formed by cutting and raising, and a bent portion (hereinafter, referred to as a positioning piece) 22a bent in a substantially L shape is formed at a tip end portion of the support piece 22. The root portion of 22 is a flat portion 22b.
A positioning hole 41a into which the positioning piece 22a is fitted is formed in a predetermined portion of the substrate 41, and the distance between the upper surface of the flat surface portion 22b and the tip of the sandwiching piece 15 is equal to the thickness of the substrate 41 or the thickness of the substrate 41. It's just a little shorter.

When the substrate 41 is fixed in such a fixing structure of the substrate 41 in the same manner as in the first embodiment, the lid 14 and the housing body 23 are fixed, and at the same time the sandwiching piece 15 is fixed. The substrate 41 is fixed by the support pieces 22. In addition, the positioning hole 41 of the substrate 41
By fitting the positioning piece 22a of the support piece 22 into a, the fixing position of the substrate 41 is naturally limited.

As described above, according to the substrate fixing structure of the fourth embodiment, the same effect as that of the first embodiment can be obtained, and the rattling of the substrate 41 at the time of fixing can be suppressed, and the substrate 41 can be suppressed. The fixing position of the substrate can be limited, and the positioning of the substrate can be facilitated.

In the substrate fixing structure of the fourth embodiment, the elastic member 17 is not provided on the flat surface portion 22b of the support piece 22 and the pressing member 20 is not formed on the inner surface of the lid body 14. However, the present invention is not limited to this, and in another embodiment, the elastic member 17 is provided on the flat surface portion 22b of the support piece 22, and the pressing member 20 is provided on the inner surface of the lid body 14.
May be provided.

[0031]

As described above in detail, according to the board fixing structure (1) of the present invention, the board fixing structure for fixing the board in the housing composed of the housing body and the lid is provided. While the support piece of the substrate is projected from a predetermined location on the inner surface of the housing body, a folding piece is extended from the peripheral edge of the lid, and at a predetermined location near the peripheral edge of the lid. A holding piece for holding the end portion of the housing body is formed between the folded piece and the folding piece, and since the substrate is fixed between the support piece and the tip end portion of the holding piece, another screw or the like is used. The substrate can be fixed only by the housing main body and the lid without using, and the cost can be reduced. Also,
Since it is not necessary to bend the claws or the like when fixing the board, the assembly time can be shortened. Further, when disassembling, by removing the lid body from the housing body, not only the lid body and the housing body but also the substrate can be detached, and the disassembly at the time of repair can be facilitated.

Further, the substrate fixing structure according to the present invention (2)
According to the above, in the substrate fixing structure according to (1) above,
Since the elastic member is attached to the substrate fixing surface of the support piece,
The same effect as that of the substrate fixing structure of the above (1) can be obtained, and the rattling of the substrate at the time of fixing is absorbed by the elastic member, so that the damage due to the impact on the substrate can be reduced.

Further, the substrate fixing structure according to the present invention (3)
According to this, in the substrate fixing structure according to (1) or (2) above, since the pressing member that presses the substrate is formed at a predetermined position on the inner surface of the lid, the above-mentioned (1) and (2) The same effect as the structure for fixing the substrate can be obtained, and the pressing force of the pressing member always acts on the substrate, and moreover, since it is fixed by the supporting piece and the sandwiching piece, the rattling of the substrate can be surely suppressed. .

Further, the substrate fixing structure according to the present invention (4)
According to the above, in the substrate fixing structure according to any one of (1), (2), and (3) above, the positioning piece that fits into the positioning hole formed in the board is the supporting piece or the sandwiching piece. Since it is formed at a predetermined point on the tip, the above (1)
The effects similar to those of the substrate fixing structure of (3) to (3) can be obtained, the arrangement of the substrates can be limited, and the positioning of the substrates can be facilitated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing a fixing structure for a substrate according to an embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a fixing structure for a substrate according to another embodiment.

FIG. 3 is a cross-sectional view schematically showing a substrate fixing structure according to still another embodiment.

FIG. 4 is a cross-sectional view schematically showing a substrate fixing structure according to still another embodiment.

FIG. 5 is a sectional view schematically showing a fixing structure of a substrate according to a conventional example.

FIG. 6A is a sectional view schematically showing a fixing structure of a substrate according to another conventional example, and FIG. 6B is a schematic enlarged perspective view of a main part thereof.

[Explanation of symbols]

 11, 41 Substrate 12, 18, 21 Housing 13, 23 Housing main body 14, 19 Lid 14a, 19a Folding piece 15 Clamping piece 16, 22 Supporting piece

Claims (4)

[Claims] 1. In a substrate fixing structure for fixing a substrate in a casing including a casing main body and a lid, a supporting piece of the substrate is projected from a predetermined position on an inner surface of the casing main body, A folding piece extends from the peripheral portion of the lid body, and a sandwiching piece for sandwiching the end portion of the casing body is formed between the folding piece and a predetermined portion in the vicinity of the peripheral edge portion of the lid body. And the substrate is fixed between the supporting piece and the tip of the sandwiching piece. 2. The substrate fixing structure according to claim 1, wherein an elastic member is attached to the substrate fixing surface of the support piece. 3. The substrate fixing structure according to claim 1 or 2, wherein a pressing member for pressing the substrate is formed at a predetermined position on the inner surface of the lid. 4. A positioning piece to be fitted into a positioning hole formed in a substrate is formed at a predetermined position of a tip portion of a supporting piece or a sandwiching piece, according to any one of claims 1 to 3. The fixed structure of a board | substrate described.