JP2002217569A - Mounting fitting for circuit board, and electronic equipment having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a mounting fitting for circuit board which can prevent breakage of an electronic component or the like mounted on a circuit board, when it hits against a body during mounting of the board having the component mounted thereon to the body. SOLUTION: A mounting fitting 1 for a circuit board includes a bottom plate 2 and engagement pieces 6 and 7, which are erected from end edges of the bottom plate 2 to be inserted into through-holes made in the circuit board to support the board at a prescribed height. The fitting previously fixedly engaged in the board is mounted to the board by passing a screw through a body to be mounted and then threadingly inserting the screw into an engagement hole 5 made in the bottom plate 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixture for a circuit board, and more particularly, to a method for attaching a circuit board to an object to be mounted.
The present invention relates to a circuit board mounting tool capable of removing obstacles to electronic components and the like mounted on a circuit board and expanding a mounting area for electronic components and the like, and an electronic device using the mounting tool.

[0002]

2. Description of the Related Art Conventionally, a circuit board mounted on an electronic device has been mounted on a main chassis (attached body) as shown in FIG.
For example, as shown in FIG.
The circuit board 2 is fixed to the stud bolt 22
3 is fixed with the screw 24 and at the same time, the main chassis 21 is fixed.
The electronic component 26 mounted on the circuit board 23 is also inserted into the rear panel 25 with respect to the rear panel 25 having a U-shaped cross section fixed to the end of the electronic component 26. Fix it. When the circuit board 23 needs to be grounded, the circuit board 23 is fixed together with the earth lug 27 and is electrically connected to the main chassis 21 via the stud bolt 22. When the circuit board 23 configured as described above is mounted, the circuit board 23 is slid by a predetermined amount in the arrow X direction along the bent locking portion 25a of the back panel 25 in the vicinity of the stud bolt 22 when the electronic circuit board 23 is mounted. The component 26 needs to be fixed to the back panel 25.

[0003]

However, if the electronic component 26 is attached to the area where the stud bolt 22 passes through, particularly on the side of the stud bolt 22 of the circuit board 23, the electronic component 26 is attached when the circuit board 23 is inserted and removed. The stud bolt 22 may be damaged by hitting it or the circuit board 23
In the main chassis 21. Therefore, such an area is a component mounting prohibited range M in which mounting of the electronic component 26 and the like is not preferable. for that reason,
The range in which the electronic components 26 and the like are attached to the circuit board 23 is naturally restricted, and the effective use range of the circuit board 23 is reduced. In addition, when the circuit board 23 is supported at a predetermined height by the stud bolts 22, if a change in the mounting height is required due to a difference in the model, etc., a main chassis having stud bolts 22 having different heights for each model is provided. 21
Must be prepared, leading to a rise in production costs.
Further, when the circuit board 23 needs to be grounded, the grounding lug 27 must be used for electrical continuity, which increases the number of work steps and the number of parts.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and eliminates obstacles to electronic components and the like that occur when a circuit board is inserted into and removed from an object to be mounted, and expands the effective use range of the circuit board. It is an object of the present invention to provide a mounting fixture. It is another object of the present invention to provide a circuit board mounting tool capable of changing a mounting height with respect to a mounted body. It is still another object of the present invention to provide a circuit board fixture that can omit the ground lug.

[0005]

A circuit board fixture according to the present invention for achieving the above object has a bottom plate and a through-hole formed in the circuit board so as to stand upright from an edge of the bottom plate. And a locking piece that is inserted into the bottom plate to position and support the circuit board at a predetermined height from the surface of the bottom plate, and that the locking piece is inserted through the through hole to fix the bottom plate to the attached body. The circuit board is attached to the attached body by locking. With this configuration, the mounting piece for the circuit board is fixed to the circuit board side by inserting the locking piece into the through-hole, so that the mounting tool for the circuit board can be connected to the circuit board for the operation of inserting and removing the circuit board from the mounting body. Since it can be slid integrally with the substrate, it is possible to eliminate a collision member against the electronic components and the like mounted on the circuit board, and to eliminate breakage of the electronic components. Further, since the circuit board mounting fixture is fixedly locked to the circuit board side, it becomes possible to mount electronic components in the conventional component mounting prohibited range. Accordingly, it is possible to increase the component mounting area by reducing the component mounting prohibited range particularly on the rear side of the substrate.

[0006] Further, the circuit board mounting fixture according to the present invention comprises:
The locking piece is provided with a high shoulder portion and a low shoulder portion that are inserted into the through holes and abut on the circuit board surface to support the circuit board at different heights. With this configuration, one circuit board mounting fixture can change the mounting height of the circuit board by bringing the high shoulder or the low shoulder into contact with the circuit board. Increase can be suppressed.

[0007] Further, the circuit board mounting fixture according to the present invention comprises:
The locking piece formed of a conductive metal and inserted into the through-hole is soldered to a conductor of the circuit board. With this configuration, the circuit board mounting fixture is formed of a conductive metal, so that the ground lug can be omitted and the circuit board can be grounded.

[0008] Further, a circuit board fixture according to the present invention is characterized in that:
The mounting device for a circuit board according to any one of claims 1 to 3, wherein the circuit board is mounted on the mounting board by screwing a screw inserted from the mounting body into an engagement hole formed in the bottom plate portion. It is characterized by being fixed to the body. With this configuration, the circuit board mounting tool is attached to the object to be mounted with the screw, so that the circuit board can be easily attached to the object to be mounted.

An electronic device according to the present invention is provided with the circuit board fixture according to any one of the first to fourth aspects. With this configuration, the working efficiency at the time of manufacturing and maintaining the electronic device is improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a circuit board fixture according to the present invention and an electronic apparatus provided with the same will be described below in detail with reference to the drawings. FIGS. 1 to 3 show an embodiment of a circuit board fixture according to the present invention.
1A is an external perspective view of a circuit board fixture, FIG. 1B is a front view thereof, FIG. 2 is a perspective view illustrating application of the circuit board fixture to a circuit board, and FIG. FIG. 3A is a plan view showing a through hole for mounting a higher portion, and FIG. 3B is a plan view showing a through hole for mounting a lower portion. In FIG. 1, a circuit board fixture 1 is formed by bending a conductive metal plate by press molding to form a bottom plate portion 2 and side wall portions 3 that stand vertically from both left and right edges of the bottom plate portion 2.
3 and has a U-shaped cross section.

An engagement hole 5 into which a screw 11 inserted from the main chassis 10 (see FIGS. 4 and 5) of the electronic device to be mounted is screwed is formed in the center of the bottom plate portion 2. A pair of locking pieces 6, 7 protruding from the vicinity of both ends and penetrating through holes 14 formed in a circuit board 13, which will be described later, are connected to the end surfaces of the side walls 3, 3.

The pair of locking pieces 6 and 7 have different protruding heights, and the locking piece 6 having a higher protruding height and the locking piece 7 having a lower protruding height are respectively provided. The opposite side walls 3 are arranged at diagonal positions to each other.

Each of the locking pieces 6, 7 has a high shoulder 3a and a low shoulder 3b corresponding to the respective height. That is,
These shoulders 3 a, 3 b correspond to the height from the bottom plate 2 to the tip end surface of the side wall 3. And each shoulder 3a, 3b
The locking pieces 6 and 7 are inserted into the through holes 14 of the circuit board 13 so as to abut on the circuit board surface so that the circuit board 13 can be supported at different heights from above the main chassis 10. (See FIGS. 4 and 5). In addition, each locking piece 6, 7
Are formed with bulging portions 6a, 7a for preventing the locking pieces 6, 7 from easily coming out of the through holes 14 when they are inserted into the through holes 14 of the circuit board 13. In addition, a cutout portion 8 which is partially cut out is formed in the side wall portion 3 in order to perform bending processing favorably.

As shown in FIG. 2, the circuit board 13 has the electronic components 12 and the like mounted on the front surface and a conductor pattern (not shown) formed on the back surface. On the circuit board 13,
A plurality of through-holes 14 are formed in a large number of places (four places in this example) through the solder lands 16 of the conductor pattern (not shown).

As shown in FIG. 3, two through holes 14a and 14b having different shapes are formed at substantially equal intervals in the circumferential direction around a through hole 15 formed large in the center, as shown in FIG. It is arranged and formed. These four holes 14 a and 14 b have a configuration in which holes of the same shape are arranged diagonally to each other with the through hole 15 as the center. The through-hole 15 is arranged so as to be continuous with the engagement hole 5 of the circuit board fixture 1 when the circuit board fixture 1 is attached to the circuit board 13, and has the same diameter as the engagement hole 5. Is provided. The through hole 15 is an escape hole that penetrates when the screw 11 is screwed into the engaging hole 5 of the circuit board fixture 1.

The first hole 14a of the through hole 14 is formed as a round hole large enough to allow the locking pieces 6, 7 of the circuit board mounting tool 1 to be inserted to their bases 6b, 7b. Pieces 6, 7
Are inserted, the respective shoulders 3a, 3b
3 can be brought into contact with the back side.

The second hole 14b of the through hole 14 is formed as an elongated hole substantially matching the cross-sectional shape of each of the locking pieces 6, 7 of the circuit board fixture 1, and furthermore, FIG. 3 (a). And (b), the hole pattern is formed to have a different major axis size depending on the circuit board 13 to be applied.

That is, in the hole pattern shown in FIG. 3A, the second hole 14b is formed to have a short dimension.
In the hole pattern shown in (1), the second hole 14b is formed to have a long dimension. 3 (a) and FIG. 3 (b), the arrangement relationship between the first hole 14a and the second hole 14b is different, and these hole patterns are selected according to the circuit board 13. Is selected.

Next, the circuit board 13 of the circuit board fixture 1 will be described.
The method of attaching the cable to the camera will be described with reference to FIGS. The circuit board 13 having the hole pattern shown in FIG.
In the case where the circuit board fixture 1 of the present embodiment is mounted on the circuit board, as shown in FIG. At this time, as shown in FIG. 4, the locking piece 6 having a higher protruding height is inserted into the first hole 14a so as to be inserted into the first hole 14a. The lower locking piece 7 is inserted into the second hole 14b.

The first hole 14a allows the locking piece 6 having a higher protruding height to be inserted to the base thereof, and the high shoulder 3a comes into contact with the back side of the circuit board 13. In addition,
At this time, the locking piece 7 having the lower protruding height is inserted into the second hole 14.
b is in a penetrating state. Then, the locking piece 6 having the higher protruding height is soldered to the solder land 16 provided on the circuit board 13 with the high shoulder 3a, so that the circuit board mounting fixture 1 is attached to the circuit board 13. At the same time as being fixedly locked, the circuit board 13 can be positioned and supported at a predetermined height.

On the other hand, when the circuit board fixture 1 of the present embodiment is mounted on the circuit board 13 on which the hole pattern shown in FIG. 3B is formed, as shown in FIG. The locking piece 7 is inserted into the first hole 14a, and the locking piece 6 having a higher protruding height is inserted into the second hole 14b.

The first hole 14a allows the lower locking piece 7 having a lower protruding height to be inserted to its base 7b, so that the lower shoulder 3b abuts on the back side of the circuit board 13. At this time, the locking piece 6 having the higher protruding height is in a penetrating state in which the base 6b has passed through the second hole 14b. The lower projection 3 is soldered to the solder land 16 so that the mounting piece 1 for the circuit board is fixedly locked to the circuit board 13, and The circuit board 13 can be positioned and supported at a predetermined height. At this time, the upper shoulder 3a of the locking piece 6 having the higher protruding height is also soldered to the solder land 16, so that the circuit board mounting fixture 1 is formed.
Can be firmly fixedly locked to the circuit board 13 and the grounding can be reliably achieved.

When the circuit board fixture 1 is fixedly locked in accordance with the hole pattern, the circuit board 13 is positioned and arranged on the main chassis 10 as shown in FIGS. 10 is inserted into the engaging hole 5
By being screwed into the main chassis 10, it is fixedly locked at different height positions on the main chassis 10 and is grounded to the main chassis 10 via the circuit board fixture 1.

Therefore, according to the circuit board fixture 1 having the above configuration, when the circuit board 13 is attached to the main chassis 10, the circuit board fixture 1 is attached to the main chassis 10 with the circuit board 13 attached to the circuit board 13 side. Since the electronic components 26 and the like mounted on the circuit board 13 are not hindered, the component mounting prohibited range M (see FIG. 7) of the electronic components 26 and the like on the circuit board 23 is reduced. , Circuit board 2
3 effective use range is expanded. In addition, the circuit board fixture 1 includes the high shoulder 3a and the low shoulder 3b in which the locking pieces 6, 7 can support the circuit board 13 at different heights. By using the parts 3a and 3b properly, it has versatility.

Further, the mounting fixture 1 for a board is formed of a conductive metal, and is grounded to the main chassis 10, whereby
There is no need to attach a conventional dedicated ground lug,
The number of parts can be reduced and the grounding work can be simplified. As the mounting fixture 1 for a substrate, a conventionally known conductive metal can be used, and for example, a plated copper that has been subjected to tin plating can be used. A screw 1 inserted from the main chassis 10 into an engagement hole 5 formed in the bottom plate 2
Since the circuit board 13 is attached to the main chassis 10 by screwing the
It can be easily attached to the device.

In the above-described embodiment, the board fixture 1 is attached to the main chassis 10 with the screw 11. However, the circuit board fixture 1 according to the present invention is provided.
Alternatively, as shown in FIG. 6, the bottom plate 2 may be slidably fitted into a locking claw 14 having an L-shaped cross section which is formed on the main chassis 10 so as to protrude therefrom. By adopting such a structure, attachment of the circuit board 13 to the main chassis 10 can be further facilitated.

The circuit board mounting fixture 1 can also be manufactured as a resin molded product of the same kind of plastic as the circuit board 13 if a grounding means for the circuit board 13 is separately provided.

Further, in the above-described embodiment, the mounting fixture 1 for a substrate has the U-shaped cross section including the side walls 3, 3 standing upright from both right and left edges of the bottom plate 2. It may be configured to have an L-shaped cross section with one side wall rising from one end edge. However, in such a configuration, it is conceivable that the supporting force of the circuit board is reduced with respect to an external force applied from a direction perpendicular to the side wall surface. What is necessary is just to attach to a circuit board so that side wall surfaces may become right angles to each other.

Further, in the above-described embodiment, the description has been made assuming that the body to be mounted is the main chassis 10. However, when a large number of circuit boards are stacked, the lower substrate may be used as the body to be mounted. .

[0030]

As described above, according to the circuit board fixture according to the present invention, since the circuit board is fixed and locked in advance on the circuit board side, the circuit board is attached to the object to be mounted. It does not hinder the electronic components mounted on the device and does not damage these components. Further, since the circuit board surface can be used except for the area of the circuit board fixture, the effective use of the circuit board particularly on the back surface side of the board can be achieved. Further, even when the support height of the circuit board is changed, the circuit board mounting fixture having the same shape can be applied, so that versatility can be obtained.
Further, if the circuit board mounting member is formed of a conductive metal, the ground connection can be easily performed, the number of components can be reduced, and the grounding operation can be simplified. Further, if the circuit board is attached to the object by screwing the bolts inserted from the object, the circuit board can be easily attached to the object. In the electronic device provided with the circuit board attachment according to the present invention, the circuit board can be easily mounted and removed, and the work efficiency of the electronic device during production and maintenance is improved.

[Brief description of the drawings]

1A and 1B show an embodiment of a circuit board fixture according to the present invention, wherein FIG. 1A is an external perspective view and FIG. 1B is a front view.

FIG. 2 is a perspective view illustrating a state in which the circuit board attachment is applied to a circuit board.

FIG. 3 shows a form of a through hole formed in a circuit board;
(A) is a plan view showing a through hole for mounting a higher portion, and (b) is a plan view showing a through hole for mounting a lower portion.

FIG. 4 is a cross-sectional view illustrating a state in which the circuit board is mounted on a circuit board and an object to be mounted, and the circuit board is supported at a high position.

FIG. 5 is a cross-sectional view illustrating a method of attaching the board fixture to a circuit board and a body to be attached, and supporting the circuit board at a low position.

FIG. 6 is a front view showing another mode of attaching the circuit board fixture according to the present invention to an attached body.

FIG. 7 is a diagram illustrating a conventional circuit board mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Board mounting fixture 2 Bottom plate part 3 Side wall part 3a High shoulder part 3b Low shoulder part 6, 7 Locking piece 10 Main chassis (attached body) of electronic device 11 Screw 13 Circuit board 14 Through hole 14a First hole 14b Second hole

Claims (5)

[Claims] 1. A bottom plate portion, which is vertically erected from an edge of the bottom plate portion, is inserted into a through hole formed in a circuit board, and positions and supports the circuit board at a predetermined height from the surface of the bottom plate portion. A circuit, wherein the circuit board is attached to the attached body by inserting the engaging piece into the through-hole and fixing and securing the bottom plate portion to the attached body. Mounting bracket for PCB. 2. The method according to claim 1, wherein the locking piece is provided with a high shoulder and a low shoulder for supporting the circuit board at different heights by being inserted into the through hole and abutting on the circuit board surface. 2. The fixture for a circuit board according to claim 1, wherein: 3. The circuit according to claim 1, wherein the fixture for a circuit board is formed of a conductive metal, and the locking piece inserted into the through hole is connected to a conductor of the circuit board by soldering. Mounting bracket for PCB. 4. The circuit board is fixed to the attachment body by screwing a screw inserted from the attachment body into an engagement hole formed in the bottom plate portion. 4. The fixture for a circuit board according to any one of 3. 5. An electronic apparatus comprising the circuit board fixture according to claim 1.