JP2001274571A - Fixing/supporting mechanism for circuit board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily fix a circuit board and to effectively assure a mounting region for an electronic part. SOLUTION: A groove 5 of two first fixing/supporting members 3a and 3b fitted to a board fixing plate 2 such as a chassis of metal plate, an upper surface of two second fixing/supporting members 4a and 4b, and a stepped collar 12, are used to sandwich and fix the end part of facing, orthogonal to each other at the corner part, two sides of a circuit board 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board fixing and supporting mechanism for supporting and fixing various circuit boards.

[0002]

2. Description of the Related Art Various electronic components of electronic equipment such as a television receiver are mounted on a circuit board. The circuit board is fixed at a constant distance from the chassis so that the circuit board does not contact a chassis made of a metal plate such as a housing of an electronic device. For example, as shown in Japanese Patent Application Laid-Open No. H11-186756, a support and fixing member body for supporting and fixing a circuit board has a projection on a circuit board support surface and an outer diameter larger than the diameter of the projection at the tip of the projection. An engaging portion is provided, a plurality of the supporting and fixing members are attached to the chassis, and the engaging portion and the projecting portion of each of the supporting and fixing members are inserted into a racket-shaped opening in which an insertion hole provided in the circuit board communicates with the supporting hole. After that, the circuit board is moved toward the support hole, the protrusion is fitted into the support hole, and the circuit board is separated from the chassis by a fixed distance by the support fixing member.

[0003]

In order to make the locking portions and the projections of the plurality of supporting and fixing members attached to the chassis into the insertion holes provided in the circuit board as described above, a plurality of supporting and fixing members are required. It is necessary to align a plurality of insertion holes of the circuit board with the locking portion, and the positioning is not easy and the workability is poor. In addition, since the plurality of insertion holes and the support holes are provided on the circuit board, there is a disadvantage in that the mounting range of the electronic components on the circuit board is restricted.

An object of the present invention is to provide a mechanism for supporting and fixing a circuit board which can easily fix the circuit board and effectively mount electronic components on the circuit board. .

[0005]

According to the present invention, there is provided a circuit board supporting and fixing mechanism for fixing a circuit board by sandwiching two ends of two opposite sides of a circuit board at a predetermined height from a base. It is characterized by having a fixed supporting member.

[0006] A second circuit board supporting and fixing mechanism according to the present invention has two first and second fixing support members, each of which has a bottom surface attached to a base. The second fixed support member has the same height as the lower end surface of the groove of the first fixed support material, and the upper surface has a shaft portion. A stepped collar having a fixing hole at a position eccentric from a center position of the shaft portion, and a stepped groove between the groove of the first fixed support member and the upper surface of the second fixed support member. It is characterized in that two ends of two orthogonal sides of opposing corners of the circuit board are sandwiched and fixed between the collar and the collar.

An elastic member which is displaced when the circuit board is sandwiched between the grooves and exerts an elastic force on the circuit board side is preferably provided at the end of the first fixed support member.

A third circuit board supporting and fixing mechanism according to the present invention includes an L-shaped first fixed supporting member and an L-shaped second fixed supporting member. The first fixed support member has a groove along the longitudinal direction on a side surface having a certain height from the bottom surface to be attached to the base, and the second fixed support member has the same height as the lower end face of the groove of the first fixed support member. A stepped collar having a shaft portion and a flange portion at two orthogonal positions on the upper surface, and having a fixing hole at a position eccentric from the center position of the shaft portion, and a first fixed support The circuit board is characterized in that the ends of two sides of the circuit board that are orthogonal to each other are sandwiched and fixed between the groove of the member, the upper surface of the second fixed support member, and the stepped collar.

The upper surface of the groove of the first fixed support member has an inclined surface such that the width of the groove becomes smaller as it goes inward, and the lower surface of the flange portion of the stepped collar attached to the second fixed support member. It is desirable to have an inclined surface such that the thickness of the flange portion becomes thicker toward the shaft portion side.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A circuit board supporting and fixing mechanism according to the present invention comprises two first fixed supporting members and two second fixing members for supporting and fixing a circuit board to a board fixing plate such as a metal plate chassis. 2
Having a fixed support member. The first fixed support member is provided orthogonal to a fixing position of the board fixing plate corresponding to one corner of the circuit board. The second fixed support member is provided at right angles to a fixed position of the board fixing plate corresponding to a corner facing the corner of the circuit board fixed by the first fixed support member. The first fixed support has a groove along the longitudinal direction on an upper side surface having a constant height from the bottom surface. The second fixed support member has the same height as the lower end surface of the groove of the first fixed support member, and a stepped collar is attached to the upper surface with a set screw. The stepped collar has a shaft portion and a flange portion, and has a fixing hole at a position eccentric from the center position of the shaft portion.

When supporting and fixing the circuit board, the second
The fixing screw for fixing the stepped collar 12 of the fixing support member is loosened, and one of the corners of the circuit board is fixed to the two first corners such that the smaller distance from the fixing hole of the shaft portion is on the inside. The circuit board is inserted into the groove of the fixed support member, and a corner facing the corner of the circuit board inserted into the groove of the first fixed support member is set on the upper surface of the second fixed support member, and the circuit board is fixed to the first fixed support member. It is sandwiched between the groove of the support member and the shaft of the stepped collar of the second fixed support member. Then, the flange portion of the stepped collar is rotated, and the larger distance from the fixing hole of the shaft portion is pressed against the side end of the circuit board, and the other side end of the circuit board is inserted into the groove of the first fixed support member. Then, the stepped collar is fixed with set screws, and both sides of the opposed corners of the circuit board are sandwiched and fixed.

[0012]

FIG. 1 is a plan view showing the structure of an embodiment of the present invention. As shown in the figure, two first fixed support members 3a, 3b and two second fixed support members 4 for supporting and fixing the circuit board 1 to a board fixing plate 2 such as a metal plate chassis or the like.
a and 4b. The first fixed support members 3 a and 3 b are provided orthogonal to one corner of the circuit board 1,
In the X direction and the Y direction. The second fixed support members 4a and 4b are provided at corners opposite to the corners of the circuit board 1 fixed by the first fixed support members 3a and 3b, and support the X direction and the Y direction of the circuit board 1. Fix it.

As shown in the front view of FIG. 2A and the side view of FIG. 2B, the first fixed support member 3 has a groove 5 extending along the longitudinal direction from the bottom surface to the upper side surface having a constant height H. And a locking portion 6 and a locking claw 7 on the bottom surface at a predetermined distance. The groove 5 has a width that sandwiches the circuit board 1. This groove 5
Is predetermined so as to allow for the warpage of the circuit board 1 and variations in the plate thickness. The locking portion 6 is formed in a substantially L-shape, is inserted into a mounting hole 8 provided in the substrate fixing plate 2, and sandwiches the substrate fixing plate 2 to position the first fixed support member 3 on the substrate fixing plate 2. I do. The lock claw 7 has a locking claw at the tip, and fixes the first fixed support member 3 fitted and positioned in the lock hole 9 provided in the substrate fixing plate 2 to the substrate fixing plate 2.

The second fixed support member 4 has the same height H as the lower end face of the groove 5 of the first fixed support member 3 as shown in the front view of FIG. Separate locking part 10
And a lock claw 11. The locking portion 10 is formed substantially in an L shape, is inserted into a mounting hole 8 provided in the substrate fixing plate 2, and positions the second fixed support member 4 on the substrate fixing plate 2 by sandwiching the substrate fixing plate 2. I do. The lock claw 11 has a locking claw at the tip, and fixes the second fixed support member 4 fitted and positioned in the lock hole 9 provided in the substrate fixing plate 2 to the substrate fixing plate 2. A stepped collar 1 is provided on the upper surface of the second fixed support member 4.
2 is attached with a set screw 13. The stepped collar 12 has a shaft portion 14 and a flange portion 15 as shown in the sectional view of FIG. The shaft portion 14 has a height slightly larger than the thickness of the circuit board 1, and the height of the shaft portion 14 is predetermined so as to allow for the warpage of the circuit board 1 and variations in the plate thickness. The stepped collar 12 has a mounting hole 16 for passing a set screw 13 at a position eccentric from a shaft center position of the shaft portion 14. A knurl is provided on the outer peripheral surface of the flange portion 15.

As shown in FIG. 5, a pair of a mounting hole 8 and a lock hole 9 are provided on the board fixing plate 2 at right angles to opposing corners of the mounting position of the circuit board 1.

When the circuit board 1 is fixed to the board fixing plate 2 by the first fixed support member 3 and the second fixed support member 4 configured as described above, first, the first fixed support members 3a, 3a are fixed.
3b, the locking portion 6 and the locking claw 7 are attached to the mounting holes 8 of the board fixing plate 2.
The first fixed support member 3a and the first fixed support member 3b are arranged on the substrate fixing plate 2 at right angles to each other. Similarly, the locking portions 10 and the lock claws 11 of the second fixed support members 4a and 4b are inserted into the mounting holes 8 and the lock holes 9 of the board fixing plate 2 and positioned and fixed. The second fixed support member 4a and the second fixed support member 4b are arranged orthogonally. In this state, the set screw 13 for fixing the stepped collar 12 of the second fixed support members 4a, 4b is loosened, and one of the circuit boards 1 with the smaller distance from the mounting hole 16 of the shaft portion 14 inside. Are inserted into the grooves 5 of the first fixed support members 3a, 3b, and the corners facing the corners of the circuit board 1 inserted into the grooves 5 of the first fixed support members 3a, 3b are inserted into the second. Fixed support members 4a, 4
b, and the circuit board 1 is sandwiched between the grooves 5 of the first fixed support members 3a and 3b and the shaft portion 14 of the stepped collar 12 of the second fixed support members 4a and 4b. Then, the flange portion 15 of the stepped collar 12 is rotated, and the shaft portion 14 eccentrically attached to the second fixed support members 4a and 4b, the one having a larger distance from the mounting hole 16 is located at the side end of the circuit board 1. And press the other side end of the circuit board 1 to the first fixed support member 3.
The stepped collar 12 is pressed into the grooves 5a and 3b, and is fixed with the set screw 13. The circuit board 1 is fixed by sandwiching both sides of the opposing corners of the circuit board 1.

When removing the circuit board 1 fixed by the first fixed support members 3a, 3b and the second fixed support members 4a, 4b, a set screw 13 to which the stepped collar 12 is fixed is removed.
And the circuit board 1 can be easily removed by rotating the stepped collar 12.

Since the outer peripheral portions of the opposing corners of the circuit board 1 are thus sandwiched and fixed, the circuit board 1 is fixed to the first fixed support members 3a and 3b and the second fixed support members 4a and 4b.
And can be easily positioned and fixed,
It is possible to eliminate restrictions on the area where the electronic components of the circuit board 1 are mounted, and to use the circuit board 1 effectively.

As shown in FIG. 6A, an inclined surface 51 is formed on the upper surface of the groove 5 provided in the first fixed support members 3a, 3b so that the groove width becomes narrower inward. It is preferable to provide an inclined surface 151 on the lower surface of the flange portion 15 of the stepped collar 12 attached to the second fixed support members 4a, 4b such that the flange portion 15 becomes thicker toward the shaft portion 14. Thus, the grooves 5 of the first fixed support members 3a, 3b
The flange portion 1 of the stepped collar 12 is provided with an inclined surface 51.
By providing the inclined surface 151 on the lower surface of the circuit board 5 and sandwiching the circuit board 1, even if the circuit board 1 is warped or has a thickness variation, the groove 5 and the first 2
The circuit board 1 can be fixed without leaving a gap between the fixed support members 4a, 4b and the flange portion 15 of the stepped collar 12, and it is possible to prevent rattling due to vibration or the like. .

As shown in FIG. 7, when the circuit board 1 is inserted into the groove 5 at the ends of the first fixed support members 3a and 3b, the circuit board 1 is displaced to exert an elastic force on the circuit board 1 side. An elastic member, for example, a leaf spring 17 may be provided. By providing the leaf springs 17 at the ends of the first fixed support members 3a and 3b in this manner, the circuit board 1 can be connected to the first fixed support members 3a and 3b.
The elastic force acting on the circuit board 1 on the side of the second fixed support members 4a, 4b when being fixed between the grooves 5 of the holes 3a, 3b and the second fixed support members 4a, 4b with the stepped collar 12. Can be added, the circuit board 1 can be securely fixed, and rattling due to vibration or the like can be prevented. Also, when the circuit board 1 is removed, the set screw 13 of the stepped collar 12 is loosened, so that the circuit board 1 is pushed by the elastic force applied to the circuit board 1 and the stepped collar 12 rotates. The circuit board 1 can be easily removed.

In the above embodiment, the second fixed supporting members 4a, 4
Although the case where the stepped collar 12 is provided in FIG. 8B has been described, as shown in the sectional view of FIG. 8A and the plan view of FIG. The second fixed support members 4a and 4b may be provided.

In the above embodiment, two first fixed support members 3a and 3b and two second fixed support members 4a and 4b are used.
Has been described, but as shown in FIG.
The circuit board 1 can be similarly fixed by using the L-shaped second fixed support member 4c similarly to the L-shaped first fixed support member 3c.

[0023]

As described above, according to the present invention, the ends of two sides perpendicular to the opposite corners of the circuit board are sandwiched and fixed at a fixed height from the base. The board can be easily positioned and fixed, and the restriction of the area for mounting the electronic components on the circuit board can be eliminated, so that the circuit board can be used effectively.

Also, the circuit board is formed with a stepped collar which is eccentrically attached to the second fixed support member by sandwiching two orthogonal side edges of one corner of the circuit board in the groove of the first fixed support member. The circuit board can be easily positioned and fixed because it is pressed toward the fixed support member 1 so as to sandwich and fix two ends of the circuit board at two orthogonal sides of the opposing corners. At the same time, it is possible to eliminate restrictions on a region for mounting electronic components on the circuit board, and to effectively use the circuit board.

Further, two ends of two opposite sides of the opposing corners of the circuit board are formed by using a first fixed support member formed in an L shape and a second fixed support member formed in an L shape. By sandwiching and fixing the portions, the circuit board can be easily positioned and fixed with a small number of parts.

Further, the upper surface of the groove of the first fixed support member has an inclined surface such that the groove width becomes narrower inward, and the lower surface of the flange portion of the stepped collar attached to the second fixed support member. By having an inclined surface that the thickness of the flange part becomes thicker as it goes to the shaft part side, even if the circuit board has warpage or uneven thickness, the groove and The circuit board can be fixed without a gap between the second fixed support member and the flange portion of the stepped collar, and rattling due to vibration or the like can be prevented.

Further, by providing an elastic member which is displaced when the circuit board is sandwiched between the grooves and exerts an elastic force on the circuit board side, at the end of the first fixed support member, the circuit board can be securely mounted. It can be fixed and can prevent rattling due to vibration or the like. Further, the circuit board can be easily removed.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of an embodiment of the present invention.

FIG. 2 is a configuration diagram of a first fixed support member.

FIG. 3 is a front view showing a configuration of a first fixed support member.

FIG. 4 is a sectional view of a stepped collar.

FIG. 5 is a plan view showing a mounting hole and a lock hole of the substrate fixing plate.

FIG. 6 is a sectional view of a first fixed support member and a stepped collar of the second embodiment.

FIG. 7 is a plan view showing the configuration of the third embodiment.

FIG. 8 is a configuration diagram of a locking claw according to a fourth embodiment.

FIG. 9 is a plan view showing a configuration of a fifth embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1; Circuit board 2; Board fixing plate 3; First fixed support member 4; Second fixed support member 5; Groove 12; Stepped collar 13; Set screw 14; Shaft portion 15 A flange portion; 16; a mounting hole;

Claims (5)

[Claims] 1. A circuit board fixing and supporting mechanism for supporting a circuit board and fixing the circuit board to a base, wherein two orthogonal sides of opposing corners of the circuit board are sandwiched at a predetermined height from the base. A fixed support mechanism for a circuit board, comprising: a fixed support member for fixing the circuit board. 2. A fixed support mechanism for a circuit board for supporting and fixing the circuit board to a base, wherein the first fixed support member and the second fixed support member each include two fixed support members.
The first fixed support member has a groove along the longitudinal direction on a side surface having a certain height from the bottom surface to be attached to the base, and the second fixed support member has a groove formed in the first fixed support member. A stepped collar having the same height as the lower end surface, having a shaft portion and a flange portion on the upper surface, and having a fixing hole at a position eccentric from the center position of the shaft portion is attached, Fixing the circuit board by sandwiching two ends of two orthogonal sides of the opposite corner of the circuit board between the groove of the support member, the upper surface of the second fixed support member, and the stepped collar; Support mechanism. 3. A fixed support mechanism for a circuit board for supporting and fixing a circuit board to a base, wherein the first fixed support member formed in an L shape and the second fixed support member formed in an L shape. Wherein the first fixed support member has a groove along the longitudinal direction on a side surface having a constant height from the bottom surface to be attached to the base, and the second fixed support member has a groove below the groove of the first fixed support member. A stepped collar having the same height as the end face, having a shaft portion and a flange portion at two orthogonal positions on the upper surface, and having a fixing hole at a position eccentric from the center position of the shaft portion is attached, The circuit board is characterized in that the two ends of two opposite sides of the opposing corner of the circuit board are sandwiched and fixed between the groove of the first fixed support member, the upper surface of the second fixed support member, and the stepped collar. A fixed support mechanism for circuit boards. 4. An upper surface of the groove of the first fixed support member has an inclined surface such that the groove width becomes narrower as it goes inward, and
4. The fixed support mechanism for a circuit board according to claim 2, wherein a lower surface of the flange portion of the stepped collar attached to the fixed support member has an inclined surface such that the thickness of the flange portion increases toward the shaft portion. 5. The circuit according to claim 2, further comprising an elastic member which is displaced when the circuit board is sandwiched between the grooves and exerts an elastic force on the circuit board side, at an end of the first fixed support member. A fixed support mechanism for the substrate.