JP2691027B2 - Information processing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing apparatus, and more particularly to an information processing apparatus in which a control board is provided with a ground for preventing radiation noise.

[Conventional technology]

As a measure for preventing radiation noise in a control board of an information processing apparatus, the configurations shown in FIGS. 8 and 9 have been conventionally known.

FIG. 8 shows a direct-stop type control board grounding configuration in which several points around the control board are fixed to a chassis made of aluminum or metal by screws to ground the control board.

Further, FIG. 9 shows a grounding structure of the control board of the thrust type, and a grounding metal piece of another piece is provided on the rear part of the control board, or a member made of a general commercial product is provided on the bottom part of the control board, and the part is The control board is brought into contact with a cut-and-raised piece provided on a chassis made of aluminum or metal by sliding the chassis as shown in the figure, and the control board is grounded to prevent radiation noise attenuation.

[Problems to be solved by the invention]

Since the prior art shown in FIG. 8 is of a type in which several points around the control board are directly fixed with screws, many screws are required, and assembly workability and maintainability such as disassembly / replacement when attaching / detaching the board are maintained. There is a problem that is bad.

Even in the configuration in which the metal piece of another piece is provided at the rear part of the slide type control board shown in FIG. 9, it is difficult to expect a sufficient effect only with this because the radiation noise attenuation is insufficient.

Further, as the operating voltage of the control board drops extremely and the regulation of the VCCI relaxation value becomes stricter, there is a problem that the radiation noise attenuation is insufficient with the above-mentioned configuration.

The present invention has been made in view of the above, the number of parts is reduced by easily and surely attaching the ground metal fitting to the mounting metal fitting with a single screw, and the mounting workability is greatly improved. It was made for the purpose of providing an information processing apparatus capable of further attenuating radiation noise by making a plurality of upper and lower contact pieces and surely contacting each contact piece with a copper foil surface of a control board and electrically grounding surely. It is a thing.

[Means for solving the problem]

In order to achieve the above object, the present invention provides an information processing device in which a grounding metal is brought into contact with a copper foil surface of a control board carried on a base chassis to provide grounding, which has one screw hole and a back stopper. A mounting bracket fixed to the base chassis, a plurality of contact pieces elastically contacting the copper foil surface of the control board, and one screw hole facing the screw hole, and the mounting bracket from above. It is equipped with a grounding metal fitting that can be attached.Place the grounding metal fitting on the mounting metal fitting so that the back stopper of the mounting metal fitting prevents rotation of the grounding metal fitting, insert a screw into the screw hole, and screw this screw into the screw hole. The grounding metal fitting is attached to the mounting metal fitting with a single screw by screwing.

[Action]

The side stoppers of the mounting brackets prevent the grounding brackets from rising and the back stoppers prevent the grounding brackets from rotating, so even if you attach the grounding brackets to the mounting brackets with one screw Is reliable and easy.

Furthermore, since the contact pieces are a plurality of contact pieces that elastically contact the upper and lower sides of the copper foil portion of the control board, a large number of contact pieces reliably contact the copper foil portion, respectively, and the total electrical resistance of the contact portion is increased. It acts to reduce the ground performance and to improve the ground performance.

〔Example〕

An embodiment of a radiation noise prevention countermeasure structure according to the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 is a grounding metal fitting formed by bending a spring steel plate into a U-shape when viewed from the side. The earth metal fitting 1 is formed with a plurality of contact pieces 2 having a spring property for holding the control board 11 from above and below and making multipoint contact with the copper foil surface 12 of the control board. At the tips of these contact pieces 2, an upper guide 3 and a lower guide 4, which serve as guide guides when the control board 11 is inserted, are formed by bending as shown in the figure.

Further, a side slit 5 serving as an engaging portion for preventing one side from rising is formed at a lower portion of the ground metal fitting 1 with respect to a mounting metal fitting 7 of the ground metal fitting which will be described later. Reference numeral 6 is a slit formed in the upper and lower plates from the open side in order to form the plurality of contact pieces 2, and is for ensuring that the contact pieces 2 are brought into contact with the copper foil surface 12 of the control board. .

Further, a protruding portion is provided in the lower portion of the earth metal fitting 1 in the lateral direction, and a screw hole for inserting the screw 10 is provided in this portion.

On the other hand, the base chassis 13 is provided with a mounting bracket 7 for mounting the grounding bracket 1. The mounting metal fitting may be directly cut and raised from the base chassis 13 as a base portion for fixing the grounding metal fitting 1, or another piece may be joined to the base chassis 13 by welding.

Also, the grounding metal fitting 1 is attached to the mounting metal fitting 7 of this grounding metal fitting.
After fixing, when the grounding metal fitting 1 is inserted into the slide type control board 11, a back stopper 8 is provided to prevent the earth metal fitting 1 from rotating around the screw 10 due to the inserting force, and further, the end surface of the portion apart from the screw fixing portion. A side stopper 9 is formed to prevent lifting.

Since the present invention is configured as described above, the grounding metal fitting 1 can be attached to the mounting metal fitting 7 with a single screw 10.

That is, in FIG. 3 and FIG. 4, when the grounding metal fitting 1 is screwed and fixed to the mounting metal fitting 7, the side slit 5 of the grounding metal fitting is inserted into the side stopper 9 of the metal fitting provided on the mounting metal fitting 7. Therefore, it is possible to prevent the earth metal fitting 1 from rising in the direction of arrow A (upward). However, if it is predicted in advance that the control board and the contact piece will be displaced when the control board is inserted, some play is provided between the side stopper 9 and the side slit 5, and the B dimension (smiley face) in FIG. It is desirable that the ground metal fitting 1 be allowed to float only by the size.

FIG. 5 shows a state of the grounding metal fitting 1 before the board is inserted.

As is apparent from this figure, the upper and lower contact pieces 2 are in contact with each other before the control board is inserted.

In FIG. 6, the control board 11 is slid in the direction of the arrow,
The front end of the control board 11 is in contact with the upper and lower guides 3 and 4 of the grounding metal 1, and is being guided while being expanded.

As is apparent from this figure, as the control board 11 is inserted, the contact pieces 2 are successively spread out and inserted until the control board 11 comes into contact with the rear end of the base chassis 13 as shown.

Then, with the control board in contact with the rear end portion of the base chassis, the both are fixed with the screw 10.

At this time, the control board 11 is sandwiched between the upper and lower central positions of the contact pieces 2, so that the copper foil surface 12 of the control board and all the contact pieces 2 are surely brought into contact with each other.

FIG. 7 shows that the control board 11 is clamped and connected to the grounding metal 1, and the control board connector 15 and the relay board 16 are connected.
17 is also configured to be connected at the same time.

According to this, the connection between the ground and the data line is automatically completed at once, and the workability of assembling is greatly improved.

According to the above-described one embodiment, the ground metal fitting 1 can be easily and surely mounted on the mounting metal fitting 7 with the single screw 10, the number of parts can be reduced, and the mounting work process can be minimized. .

The one screw that can be securely attached is that the mounting bracket 7 is provided with the back stopper 8 and the mounting bracket 7
This is because the side slits 5 of the ground metal fitting 1 are engaged with the side stoppers 9 provided on the.

Further, since the contact pieces 2 are vertically arranged, the contact pieces reliably contact the copper foil surface of the control board due to the elasticity of each contact piece, the electrical resistance of the ground is reduced, and it is possible to electrically ground reliably. It greatly contributes to the attenuation of radiation noise.

〔The invention's effect〕

As described above, according to the present invention, the ground metal fitting can be easily and surely mounted on the mounting metal fitting with a single screw, the number of parts can be reduced, and the mounting work process can be minimized.

Also, if the contact pieces are plural in number, the contact pieces can surely contact the copper foil surface of the control board and can be electrically grounded reliably, which can greatly contribute to attenuation of radiation noise. .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a grounding metal fitting portion of an embodiment of the present invention, FIG. 2 is a perspective view showing a relationship between a base chassis and a control board, and FIG. 3 is a state in which a grounding metal fitting is attached to a metal fitting fitting. FIG. 4 is a plan view showing the state of the earth metal fitting before the control board is inserted, FIG. 4 is a sectional view showing the state of the earth metal fitting before inserting the control board, and FIG. FIG. 7 is a perspective view showing a state in which a ground and a relay board connector are simultaneously connected, FIG. 8 is an overall perspective view showing a conventional control board direct-fixing type, and FIG. 9 is a conventional slide. It is a perspective view which shows the earth removal state of a control board. 1 ... Ground metal fitting, 2 ... Contact piece, 3 ... Upper guide, 4
...... Lower guide, 5 ...... Side slit, 6 ...... Slit, 7 ...... Mounting metal, 8 ...... Back stopper, 9 ......
Side stopper, 10 ... Screw, 11 ... Control board, 12 ...
Copper foil surface, 13 …… Base chassis, 14 …… Control board fixing bracket, 15 …… Connector, 16 …… Relay board, 17 …… Connector.

Claims (4)

(57) [Claims] 1. An information processing device in which a grounding metal is brought into contact with a copper foil surface of a control board carried on a base chassis to ground, and the mounting has one screw hole and a back stopper and is fixed to the base chassis. A metal fitting, a plurality of contact pieces that elastically contact the copper foil surface of the control board, and one screw hole facing the screw hole, and a ground metal fitting that is mounted on the mounting metal fitting from above. By mounting the grounding metal fitting on the mounting metal fitting in a state where the back stopper of the mounting metal fitting prevents rotation of the grounding metal fitting, inserting a screw through the screw hole, and screwing the screw into the screw hole,
An information processing apparatus in which the grounding metal fitting is attached to the mounting metal fitting with a single screw. 2. An information processing apparatus for grounding a grounding metal by contacting a copper foil surface of a control board carried on a base chassis, the mounting having one screw hole and a side stopper fixed to the base chassis. A ground having a metal fitting, a plurality of contact pieces elastically contacting the copper foil surface of the control board, one screw hole facing the screw hole, and a side slit, and being mounted on the mounting metal fitting from above. With the metal fittings, place the ground metal fittings on the mounting metal fittings with the side stoppers of the mounting metal fittings that prevent the ground metal fittings from rising, insert the screws into the screw holes, and screw the screws. An information processing apparatus in which the grounding metal fitting is attached to the mounting metal fitting with a single screw by being screwed into the hole. 3. An information processing apparatus for grounding a grounding metal by contacting a copper foil surface of a control board carried on a base chassis, wherein the base chassis has one screw hole, a back stopper and a side stopper. Fixed mounting hardware,
A plurality of contact pieces that elastically contact the copper foil surface of the control board, one screw hole that faces the screw hole, and a side slit, and a grounding metal fitting that is mounted on the mounting metal fitting from above. It is equipped with the side fittings of the mounting metal fittings so that the side stoppers prevent the grounding metal fittings from rising and the back stoppers prevent the grounding metal fittings from rotating. An information processing device in which the arm fitting is attached to the mounting fitting with a single screw by threading a screw through the screw and screwing the screw into the screw hole. 4. The information processing device according to any one of claims 1 to 3, wherein the plurality of contact pieces have a plurality of contact pieces in each of the vertical directions so as to sandwich the copper foil surface of the control board from the vertical direction. An information processing apparatus that is configured by.