JPH0823181A - Structure of holding board - Google Patents

Abstract

PURPOSE:To provide a holding structure that absorbs vibrations produced in the enclosure of an apparatus and thus protects a circuit board from such vibrations, and that makes it possible to smoothly insert a circuit board into the enclosure. CONSTITUTION:A circuit board 21 is brought into tight contact with a first and a second elastic rollers 12, 13, and is clamped between them. When the circuit board 21 is inserted between the first and second rollers 12, 13, the rollers 12, 13 rotate in the direction of board insertion due to force of friction between them and the circuit board 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board holding structure which is inserted and mounted in a housing for housing a board.

[0002]

2. Description of the Related Art In many electronic devices such as communication devices, many circuit boards are slidably mounted in a device housing.
8 and 9 show a conventional mounting structure of a circuit board of this type.

A rack 1 for accommodating substrates is mounted in a housing (not shown) of electronic equipment, and guide rails 2 are provided in multiple stages on the left and right side walls of the rack 1. Rails 5 are screwed to both left and right ends of a circuit board 4 configured by mounting various electronic components on a printed wiring. Then, the circuit board 4 is inserted into the rack 1 from the direction of the arrow m so that the rail 5 is slid on the guide rail 2, and the screw fastening portion 5 a provided at the rear end of the rail 5 is attached to the rack 1. It is configured to be screwed to the tongue piece 1a on the side.

However, according to this conventional structure, when an external force is applied to the equipment case, the vibration of the case is transmitted to the circuit board 4 via the rack 1, the guide rails 2 and the rails 5, so that the circuit board 4 is exposed to a high frequency. When electronic components that are easily affected by vibration of components are mounted, vibration of the circuit board 4 may prevent desired electrical characteristics from being obtained.

Further, in order to solve the above problems, FIG.
And, as shown in FIG. 11, the vibration isolation rubber 7 is provided on the upper surface of the guide rail 2 to receive the lower surface of the rail 5, and the vibration isolation rubber 9 is provided on the "L" metal fitting 8 provided on the rack 1. If it is configured to receive the upper surface of the rail 5, both anti-vibration rubbers 7, 9
In order to slide and position the rail 5 between them, a gap t is required between the rail 5 and the vibration-proof rubber 9, and the gap t cannot absorb the vibration generated in the housing. Further, since the rail 5 cannot be smoothly slid due to the frictional force of the vibration isolating rubber 7, the tip of the rail 5 easily abuts on the vibration isolating rubber 9 when the rail 5 is slid. There is also a problem that the rubber 9 for vibration proof is peeled off when 5 is slid several times.

[0006]

As described above, in the mounting structure of the circuit board shown in FIGS. 8 and 9, the circuit board vibrates due to the vibration of the equipment casing, and sufficient electrical performance cannot be obtained. There were cases. Further, in the mounting structure shown in FIGS. 10 and 11, there is a problem that the vibration generated in the equipment casing cannot be sufficiently absorbed because a gap is formed between the vibration-proof rubber and the circuit board. There is a problem that the sliding of the circuit board becomes difficult due to the frictional force.

The present invention has been made to solve the above-mentioned conventional drawbacks, and it is possible to sufficiently absorb the vibration generated in the equipment casing and protect the circuit board from the vibration. An object of the present invention is to provide a substrate holding structure that can be smoothly inserted into a device housing.

[0008]

The invention according to claim 1 is
In a board holding structure for holding a circuit board which is inserted into a housing of an electronic device and arranged at a predetermined position of the housing,
In a state of being on one surface side of the circuit board arranged at the predetermined position and along both end portions substantially parallel to the insertion direction of the circuit board, and in a state where the peripheral surface is in contact with the circuit board. A plurality of first rollers disposed in the housing and having rotation centers thereof substantially orthogonal to the insertion direction of the circuit board; and a plurality of first rollers that are associated with the plurality of first rollers, and A second roller disposed in the housing with its peripheral surface in contact with the other surface side of the circuit board, the center of rotation of which is substantially orthogonal to the insertion direction of the circuit board; At least one of the first and second rollers is formed of an elastic body.

According to a second aspect of the present invention, there is provided a board holding structure for holding a circuit board which is inserted into a housing of an electronic device and arranged at a predetermined position of the housing, and the circuit arranged at the predetermined position. In a state along one end of the board, which is substantially parallel to the insertion direction of the circuit board,
A plurality of first rollers, which are arranged in the housing with their peripheral surfaces in contact with the circuit board and whose rotation centers are substantially orthogonal to the insertion direction of the circuit board, and a plurality of these rollers. Each of the first rollers is disposed in the housing with its peripheral surface abutting on the other surface side of the circuit board, and its rotation center is substantially in the insertion direction of the circuit board. A second roller that is orthogonal to the second roller,
The roller is movable in a direction of moving closer to and away from the first roller, and is pressed by the elastic body toward the first roller.

According to a third aspect of the present invention, in the first or second aspect, an auxiliary guide rail for guiding the circuit board between the first and second rollers is provided in the housing.

[0011]

In the invention according to claim 1, since at least one of the first and second rollers is formed of an elastic body,
Further, in the invention according to claim 2, since the second roller is movable in the direction of approaching and separating from the first roller and is pressed by the elastic body toward the first roller, In any of the inventions according to items 1 and 2, both ends of the circuit board can be elastically held by a plurality of sets of the first and second rollers without a gap. Moreover, since the rotation centers of the first and second rollers are substantially orthogonal to the insertion direction of the circuit board, when the circuit board is inserted between the first and second rollers, the first and second rollers are Rotate in the insertion direction of the circuit board while closely contacting the circuit board.

In the invention according to claim 3, the invention according to claim 1
According to the second aspect of the invention, since the guide rail for guiding the circuit board is provided between the first and second rollers, the circuit board can be inserted between the first and second rollers more easily.

[0013]

Embodiments of the present invention will be described in detail below with reference to FIGS.

FIGS. 1 and 2 are views showing a first embodiment, and are partially cutaway perspective views of a board storage rack, and FIG. 2 is a view showing mounting of a circuit board on the rack.

A rack 11 for accommodating substrates is provided in a housing (not shown) of the electronic apparatus according to this embodiment, and the left and right side walls of the rack 11 are provided with a circuit as shown in FIG. A plurality of pairs of rollers 12 and 13 for sandwiching the left and right ends 21a and 21a of the board 21 are provided, and an auxiliary guide rail 15 for guiding the circuit board 21 between the rollers 12 and 13. , 16 are provided.

The guide rails 15 and 16 are spaced apart from each other by a distance sufficiently larger than the plate thickness of the circuit board 21 so that the circuit board 21 can be easily inserted between the guide rails 15 and 16, and the racks 11 are opposed to each other. It is fixed to.

The rollers 12 and 13 are made of an elastic material such as rubber, and the rotation center 12a of the roller (first roller) 12 is in the insertion direction (arrow a direction) of the circuit board 21 into the rack 11. It is provided on the lower guide rail 15 in a substantially orthogonal state, and the roller (second roller) 13 is provided on the upper guide rail 16 in a state that its rotation center 13a is substantially orthogonal to the insertion direction of the circuit board 21. Has been. Further, a part of the roller 12 is made to project above the guide rail 15, and a part of the roller 13 is made to the guide rail 1.
6 is projected downward, and the peripheral surfaces of both rollers 12, 13 are in contact with each other at a substantially intermediate position between both guide rails 15, 16.

The guide rails 15 and 16 and the rollers 12 and 13 are the circuit board 21 mounted in the rack 11.
A plurality of stages are provided in the rack 11 in the vertical direction according to the number of sheets.

The circuit board 21 is mounted on the rack 11 as shown in FIG.
1a and 21a are inserted into the guide rails 15 and 16, and the rollers 12 and 13 are guided by the guide rails 15 and 16.
This is done by positioning the circuit board 21 in between. In this case, both rollers 12 and 13 are formed of an elastic body, and when the circuit board 21 is inserted between the rollers 12 and 13, the roller 12 causes an arrow due to a frictional force with the lower surface (one surface) 21b of the circuit board 21. Since the roller 13 rotates in the direction b, and the roller 13 rotates in the direction of the arrow d by the frictional force with the upper surface (the other surface) 21c of the circuit board 21, the circuit board 21 is rotated by the rollers 12, 1.
It can be easily inserted between the three. Since both ends 21a of the circuit board 21 are elastically sandwiched by the rollers 12 and 13 and mounted in the rack 11, the vibration of the equipment housing is absorbed by the rollers 12 and 13 and the circuit board 21 is absorbed. Vibration is difficult to be transmitted.

In this embodiment, both rollers 12 and 13 are made of elastic material. However, only one of the rollers 12 and 13 is made of elastic material so that it is closely attached to the circuit board 21. Can sufficiently absorb the vibration generated in the housing.

FIGS. 3 to 7 are views showing a second embodiment of the present invention, FIG. 3 is a partially cutaway perspective view of a rack for storing substrates, and FIG. 4 is a view in the direction of arrow B in FIG. 5 is a view taken in the direction of the arrow D in FIG. 3, FIG. 6 is a sectional view taken along line EE of FIG. 4, and FIG.
It is a F line sectional view.

A rack 30 for accommodating boards is provided in a housing (not shown) of the electronic apparatus according to the present embodiment, and the left and right side walls of the rack 30 are provided with circuit boards as shown in FIG. A plurality of pairs of rollers 32 and 33 for sandwiching the left and right ends 31a and 31a of 31 are provided, and
Between the rollers 32 and 33, auxiliary guide rails 35 and 36 for guiding the circuit board 31 are provided.

The guide rail 35 is formed by using the bottom portion of a rail 38 having a substantially U-shaped cross section, and the rail 38 is fixed to the side wall of the rack 30 by screws or the like. Further, the guide rail 36 is formed by using the bottom surface portion of the rail 40 having a substantially “L” -shaped cross section, and the rail 40 is in a direction in which the guide rail 36 approaches and separates from the guide rail 35 as shown in FIG. Is attached to the rail 38 via the connecting tool 43 in a state of being movable in the arrow hK direction, and is a spring 4 that is an elastic body.
4 is pressed in the direction of arrow h.

That is, as shown in FIG. 6, the connector 43 is provided with a thick diameter spacer portion 46, a thin diameter shaft portion 47 provided at one end of the spacer portion 46, and a tip end of the shaft portion 47. The other end portion of the spacer portion 46 is fixed to the guide rail 36 by a countersunk screw 49. Further, the connecting tool 43 in which the shaft 44 is provided with the spring 44 is provided with a screw portion 48 in a hole portion 52 formed in the upper surface portion 51 of the rail 38 (this hole portion is slightly larger than the diameter of the shaft portion 47). After the spring washer 53 and the washer 54 are attached to the male thread portion 48, the nut 55 is screwed. Therefore, the rail 40
Is movable in the direction of the arrow h-K within a range in which the shaft portion 47 can move using the hole portion 52 as a guide, and the spring 4
4 is urged in the direction of arrow h.

On the other hand, as shown in FIGS. 5 and 7, in the roller 32, which is the first roller, the male screw 32a, which is the center of rotation, is substantially orthogonal to the insertion direction of the circuit board 31 (direction of arrow e). It is attached to the rail 38 by being screwed to the tongue 57 of the rail 38, and the roller 33, which is the second roller, has its male screw 33a, which is the center of rotation, substantially parallel to the insertion direction of the circuit board 31. It is attached to the rail 40 by being screwed onto the rail 40 in a state of being orthogonal to each other. A part of the roller 32 is projected above the guide rail 35, and a part of the roller 33 is projected below the guide rail 36. Therefore, the guide rail 36, which is biased by the spring 44 in the direction of arrow h, is positioned at a predetermined position when the roller 33 contacts the roller 32, and the distance between the guide rail 36 and the guide rail 35 at this time is , Both rails 35, 3
The distance is such that the circuit board 31 can be easily inserted between the six.

As shown in FIGS. 3 and 4, the circuit board 31 is mounted on the rack 30 at both ends 3 of the circuit board 31.
1a and 31a are inserted between the guide rails 35 and 36, and the rollers 32 and 3 are guided by the guide rails 35 and 36.
This is done by positioning the circuit board 31 between the three.
In this case, the roller 33 is movable in the direction of the arrow K, which is the direction away from the roller 32, and the circuit board 3
When 1 is inserted between the rollers 32 and 33, the roller 32 rotates in the direction of the arrow f due to the frictional force with the lower surface (one surface) 31b of the circuit board 31, and the roller 33 rotates the upper surface (the other surface) 31c of the circuit board 31. Since it rotates in the direction of arrow g due to the frictional force with the circuit board 31, the circuit board 31 can be easily inserted between the rollers 32 and 33. The circuit board 31 has both end portions 31.
Since the a and 31a are elastically sandwiched by the rollers 32 and 33 and mounted in the rack 30, the vibration of the device housing is absorbed by the rollers 32 and 33, and the vibration is hard to be transmitted to the circuit board 31. Become.

[0027]

As described above, in the invention according to claim 1 or 2, since the circuit board is sandwiched by the first and second rollers in an elastic state, it is not affected by an external impact. Even if the equipment casing vibrates, the vibration of the casing is absorbed by the rollers and is difficult to be transmitted to the circuit board. Further, when the circuit board is inserted between the first and second rollers, the respective rollers also rotate in the board insertion direction.
The circuit board can be easily inserted between the rollers.

According to the invention of claim 3, claim 1
According to the second aspect of the invention, since the guide rail for guiding the circuit board is provided between the first and second rollers, the circuit board can be inserted between the first and second rollers more easily.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a substrate storage rack according to a first embodiment of the present invention.

FIG. 2 is a diagram showing mounting of a circuit board on the rack shown in FIG.

FIG. 3 is a partially cutaway perspective view of a substrate storage rack according to a second embodiment of the present invention.

FIG. 4 is a view on arrow B in FIG.

5 is a view on arrow D in FIG.

6 is a cross-sectional view taken along the line EE of FIG.

7 is a sectional view taken along line FF of FIG.

FIG. 8 is a partially cutaway perspective view of a conventional substrate storage rack.

9 is a sectional view taken along line HH of FIG.

FIG. 10 is a partially cutaway perspective view of another conventional substrate storage rack.

11 is a cross-sectional view taken along the line I-I of FIG.

[Explanation of symbols]

11, 30 ... Rack 12, 32 ... First
Rollers 13, 33 ... second rollers 15, 16, 3
5, 36 ... Guide rails 21, 31 ... Circuit board

Claims (3)

[Claims] 1. In a board holding structure for holding a circuit board which is inserted into a housing of an electronic device and arranged at a predetermined position of the housing, one surface side of the circuit board arranged at the predetermined position. Is arranged in the housing in a state of being along both ends substantially parallel to the insertion direction of the circuit board, and in a state in which the peripheral surface is in contact with the circuit board, the rotation center of which is the circuit board A state in which a plurality of first rollers that are substantially orthogonal to the insertion direction and the plurality of first rollers are made to correspond to each other, and the peripheral surface abuts on the other surface side of the circuit board. A second roller which is disposed in the housing and has a rotation center substantially orthogonal to the insertion direction of the circuit board, and at least one of the first and second rollers. Is a base characterized by being formed of an elastic body Board holding structure. 2. In a board holding structure for holding a circuit board which is inserted into a housing of an electronic device and arranged at a predetermined position of the housing, one surface side of the circuit board arranged at the predetermined position. And the center of rotation of the circuit board is arranged in a state in which both sides of the circuit board are substantially parallel to the insertion direction of the circuit board and the peripheral surface of the circuit board is in contact with the circuit board. A plurality of first rollers that are substantially orthogonal to the insertion direction of each of the plurality of first rollers, and the plurality of first rollers are made to correspond to each other, and the peripheral surface abuts on the other surface side of the circuit board. A second roller which is disposed in the housing in a state and the center of rotation of which is substantially orthogonal to the insertion direction of the circuit board, the second roller with respect to the first roller. The first row is made movable in the direction of approaching and separating. A substrate holding structure characterized in that it is pressed by an elastic body toward the la. 3. The board holding structure according to claim 1, wherein an auxiliary guide rail for guiding the circuit board between the first and second rollers is provided in the housing. .