JPS6151994A - Electronic device having memory means - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention particularly relates to an electronic device having a storage means suitable for implementation in a personal computer.

[Background of the invention]

Electronic equipment, whether it handles analog signals or digital signals, may pick up magnetic or electrostatic noise and malfunction, and countermeasures against this are important.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic device having a storage means that can take sufficient measures against noise.

[Summary of the invention]

In the present invention, the inside of the case, which is recessed by the pace, the top plate, the front plate, and the back plate, is partitioned into at least two stages by a partition plate made of a shielding material. When shielding magnetic noise, a magnetic material such as iron plate is used as the material for the partition plate. If the noise is not magnetic noise but f91Fi, a current-gathering material such as an aluminum plate is used.

The iron plate is both a magnetic material and a dedicated material, so it is effective against both types of noise. However, since iron plates have lower conductivity than aluminum plates, it is desirable to use a combination of an aluminum plate and a steel plate if measures are to be taken against both types of noise.

It is desirable that the pace, top plate, side plates, and back plate be made of shielding material, similar to the partition plate. Of course, it is desirable that the front plate be made of 7-metal material, but if the front plate is made of plastic, for example, the end of the partition plate on the front plate side should be bent towards the pace to create a shielding effect. be able to.

A main printed board for controlling at least the storage means is provided between the partition plate and the base, and a power supply unit for supplying power to the storage means and the main printed board is provided between the partition plate and the top plate. and

The main printed board is equipped with a central processing unit, random access memory (hereinafter referred to as RAM), read-only memory (hereinafter referred to as ROM), and the like.

A partition wall made of magnetic and/or electrostatic shielding material is provided between the power supply unit and the storage means.

[Embodiments of the invention]

Embodiments of the present invention shown in the figures will be described below.

FIG. 1 shows the system configuration of a personal computer in which the present invention shown in 1 is installed on the slave device, 2 is a keyboard, 3 is a cold cathode discharge tube display device, and 4 is placed on the slave device l. It is.

Now, the case 6 of the electronic device 1 includes a base 7, a top plate 8, and a side plate 9.
．． 10. It is composed of a front plate 11 and a rear plate 12.

The pace 7 is made of an iron plate, and both sides thereof are bent at right angles to stand up, and have side sides 13.14 facing the side plates 9.10. On both sides 13 and 14, there are at least two cutting lines 15 to 18 extending in the horizontal direction.
The guides 19 and 20 are formed by cutting and raising the circumference υ of the cuts #1115 to #18 toward the inside of the case 6 by a purling process. Guide to these two articles 19
, 20, the main printed board 21 is attached to the base 7.

The bottom surface 22 of the pace 7 is provided with four recesses 23, although only three are visible in the figure when viewed from the bottom surface 22.
A cushioning material 24 is pasted here for the purpose of improving installation stability on the desk 5 and absorbing vibrations. The base 7 is provided with a protrusion 25 by punching at approximately the center thereof when viewed in the front-rear direction for the purpose of rectifying the cooling air and increasing the rigidity of the base 7, which will be explained later. In addition, through holes 26, 27 for taking in cooling air are provided in the side 13 further above the cutting line 15 and in front of the cutting line 15, 16. Further, a notch 29 is provided at the front of the side edge 14 for adjusting the size of the discharge side of the cooling fan 28.

The upper end of the side edge 13 forms an angle of 90 degrees with respect to the side edge 13 and is folded toward the inside of the case 6.

This bent side 30 is adapted to receive one end of the partition plate 31. Therefore, a conical embossment 32 is provided on the bent side 30, and the partition plate passes through a long hole 33 provided in the partition plate 31 between the conical embossment 33 and the bent side 30. 31 is sandwiched between them.

In addition, the base 7 is provided with a seat 34 for receiving the other side of the partition plate 31. This seat 34 is also constructed by bending an iron plate), and the height of the seat 34 is 3 on the bent side.
The height should be exactly equal to the height of 0.

The seat 34 is also provided with a conical cutout 35, and the partition plate 31 is also provided with an elongated hole 36 at a position corresponding to the conical cutout 35. It is sandwiched between the shaped embossing 35.

The cooling fan 2 is bent from this seat 34 into an upright position.
8 is provided, and another mounting seat 38 is provided hanging from the seat 34.
are provided, and two diagonal portions of the cooling fan 28 are fixed to both mounting seats 37 and 38 with bolts 39 and 40. The bolt 40 also passes through a through hole 41 provided on the side 14.

Furthermore, as shown in detail in FIG. 2, the front end of the base 7 has a spigot part 42 that slightly rises and extends forward. It has entered Section 43.

A seat 44 is provided between the spigot parts 420, which stands up larger than the spigot part 42 and protrudes further, and this seat 43 is provided with a screw hole 44.

The front plate 11 is a plastic molded product, and screws 45 are passed through through holes (not shown) provided therein, and the screws 45 are tightened into the screw holes 44 to fix the front face &11 to the base 7.

The front plate 11 has an opening 52 through which the floppy disk entrances 51a and 51b of the two floppy disk drive units 50a150b serving as storage means 50 are exposed.
An opening 55 is provided for exposing the operation port 54 of the power switch 53.

In addition to controlling the storage means 50, the main printed board 21 has a CPU% ROM and a RAM (not shown).
The floppy disk drive unit 50as is configured to receive command signals from the keyboard 2, process data, and output the results to the CRT 8, printer 4, and Freonbie disk drive unit 50bK.

The floppy disk drive unit 50ald is configured to store a system program and drive a floppy disk, and the floppy disk drive unit 50b is configured to store a user program and drive a floppy disk.

In addition, the main printed board 21 has connectors 61, 62, 63
．． The sub-printed boards 65, 66, and 67 are mounted substantially parallel to the main printed board 21 via 64, respectively.

In addition, the main printed board 21 has a connector To, 71.72
Additional functions via printed board 73.74, 75.76 etc.
It is constructed so that it can be installed in a vertical position.

The back plate 12 is made of an iron plate and has a conical seat 80 extending forward at a position matching the height of the main printed board 21. This seat 80 is provided with a screw hole 81. Place the rear end of the main printed board 21 on this seat 80, and screw the
The main printed board 21 is fixed to the seat 80.

A connector 83 provided on the main printed board 21 is provided on the back plate 12.
．． Openings 85 and 86 for exposing the connector 84, and opening 88 for exposing the connector 87fc provided on the sub-printed board 67.
, openings 93 to 96 are provided for exposing connectors 89 to 92 provided on the backs of the additional function printed boards 73 to 76.

Now, the partition plate 31 is composed of an iron plate hv, and this partition plate 31
The end on the front plate 11 side is bent toward the base 7. The lower end 101 of this bent side 100 is designed to have such a dimension that almost no gap is left between it and the base 7. A portion 102 of the bent side 100 facing the opening 55 protrudes slightly forward, and a power switch 53 is fixed here with a screw 103.

One end 105 of the partition plate 31 extends close to the suction port of the cooling fan 28, and the rear 106 is notched so as not to interfere with mounting of the additional function printed boards 73 to 76. The edge 107 of this notched portion is bent directly for the purpose of rectifying the cooling air to effectively guide it to the suction port of the cooling fan 28 and for the purpose of increasing the rigidity of the partition plate 31. This folding may be performed downward.

The partition plate 31 has six L-shaped raised portions, and these L-shaped raised portions connect the floppy disk drive unit.
Seats 110 to 115 for attaching 50a and 50b
is formed.

The seats 110, 112, 113 and 115 are provided with through holes 120-123, and the 70-tube disk drive unit 50a is placed on the seats 110-113 and fixed with screws 180 and 131.

In addition, the 70x disk drive unit 50b is located at seat 1.
12 to 115 and tightened and fixed with screws 132 and 133. The floppy disk drive units 50a and 50b on the handlebar are fixed to the seat at two diagonal positions.

One end 134 of the partition plate 31 is protruded in an inverted manner to function as a face pattern.

A direct support plate 136 stands between the seats 112 and 113 when viewed in the width direction. This vertical support plate also supports both floppy disk drive units 50a.

It is preferable to construct it with an iron plate in consideration of noise sealing between the parts 50b. The tip of the vertical support plate 136 is designed so that it just contacts the top plate 8 when the top plate 8 is turned over to its normal state, or is slightly lower than that. As shown in FIG.
The manual support plate 136 also serves to prevent the top plate 8 from being distorted when the top plate 8 is placed thereon.

The partition plate 31 is fixed to the base 7 and the seat 34 with two screws 138 and 139.

The power supply unit 140 is installed behind the floppy disk drive units 50a and 50b with a ventilation gap 141 in between.

The power supply unit 140 is composed of an iron plate and is connected to the Kyudai box 1.
50, and has ventilation holes 153, 154 only on both side surfaces 151, 152 of the seat 1. A transformer 157 is installed inside the surface 156 in close contact with the back plate 12 in the large box 150.
or the main switching element 15 of a switching regulator.
s% is attached, and the back plate 12 is used for heat radiation.

A surface 160 of the large box 150 facing the floppy disk drive unit functions as a noise sealing plate.

The top plate 8 and both side plates 9 and 10 are integrally constructed by bending iron plates.

Inflow ports 171, 172, 173, and 174 are provided in the portions of the side plate 9 facing the cutting lines 15.16 and the through holes 26.27, and a filter 175 is pasted inside these ports.

Further, an outlet 176 is provided on the surface of the side plate 10 facing the cooling fan 28, and a filter 177 is also pasted on the inside of this outlet. Furthermore, as shown in FIG. 8, a sealing material 181 such as rubber is pasted on the inner side of the side plate IO at the part facing the frame 180 of the cooling fan 28, so that the cooling air can flow as shown by the dotted arrow 182. This prevents the water from flowing backward without exiting from the outlet 176.

The front ends of the top plate 8 and the side plates 9 and 10 are stepped and placed inside, so that they fit inside the front plate 11.

Further, the rear ends of the top plate 8 and side plates 9 and 10 are bent inward so as to cover the outside of the back plate 12. This covered portion 190 is provided with a through hole, through which a screw 191 is fixed to the back plate 12, and the side plate 9, I
Pass the screw 194 through the OK hole 193 and insert the side plate 9.1.
0 is fixed to the sides 13 and 14.

195 connects the rear surface 156 of the power supply unit 140 to the back plate 1
This is a screw to make it stick to 2.

Now, in the structure constructed as above, when assembling it, K must first attach the front plate 1 using the screws 45.
1 is fixed to the base 7, and the main printed board 21 is attached to the back plate 12 using screws 82.

In this state, the main printed board 21 is placed on the guide 19.20, and the main printed board is mounted on the base 7, and then the partition plate 31
Assemble into the specified state. After that, the floppy disk drive units 50a and 50b are installed on the partition plate 31, and 1. It is sufficient to install the source unit 140, cover it with a cover consisting of both side plates of the top plate 8, and tighten the screws 191 and 194.

Also, when the cooling fan is energized, the air inlets 171 to 17
4 to cutting line 15.16. The air that entered the case through the through holes 26 and 27 is separated into upper and lower parts by a partition plate 31. One side cools the main printed board 21 under the partition plate 31, and the other side cools the main printed board 21 above the partition plate 31. The floppy disk drives 50a, 50b and the power supply unit 140 are cooled in parallel, and both reach the cooling fan 28 and the air outlet 176.
flows out from

At this time, the edge 107 functions to rectify the wind passing over the partition plate 31 toward the cooling fan 281'C.

Note that a floppy disk drive unit that handles a 70-tube disk that stores system programs operates much more frequently than a drive unit that handles a 70-tube disk that stores user programs. Therefore, in this embodiment, the drive unit with the /Sdem program recorded thereon is placed downwind of the cooling air from the drive unit that handles the floppy disk that stores the user's program. Since there is less dust on the leeward side than on the upwind side, this arrangement is effective in increasing the lifespan of the drive unit that handles the floppy disk that stores the system program.

The present invention is not limited to the above-mentioned examples, but can be varied in length. For example, a hard disk drive unit Q can be used as the storage means.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the main printed board, storage means, 'JL source unit, etc. are completely noise-sealed by the partition plate, base, top plate, side plates, back plate, etc. It is possible to construct an electronic device that is resistant to pitch noise.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the system configuration of a partial computer equipped with the electronic device of the present invention, and FIG. 2 is an exploded perspective view of the electronic device shown in FIG. The back plate is not shown. 3 is an exploded perspective view of the electronic device shown in FIG. 1 in a state different from that shown in FIG. 2, FIG. 4 is a cutaway side view of the electronic device shown in FIG. 1, and FIG. Figure 6 is a horizontal cross-sectional view of the area where the main switch is installed, Figure 6 is a vertical cross-sectional view showing how the main printed board is attached to the base, Figure 7 is a vertical cross-sectional view showing how the storage means is attached to the partition plate, 8
The figure is a longitudinal cross-sectional view showing the mounting state of the cooling fan. 1 is an electronic device, 6 is a case, 7 is a base, 8 is a top plate, 9
．． 10 is a side plate, 11 is a front plate, 12 is a back plate, 13.1
4 is the side, 15 to 18 are the cutting lines, 19.20 is the guide,
21 is a main printed board, 28 is a cooling fan, 31 is a partition plate, 50 is a storage means, 50a and 50b are 70-tube disk drive units, 140 is a power supply unit, 141
is a ventilation interval, 171 to 175 are air inlets, and 176 is an air outlet. Sheep 7 Diagram θ Diagram procedure amendment (method) Indication of the case 1982 Patent Application No. 174292 Name of the invention Patent applicant's name '5101' is a formula company Hitachi Manufacturing representative agent

Claims (1)

[Claims] 1. The inside of the case surrounded by the base, the top plate, the side plates, the front plate, and the back plate is partitioned into at least two stages by a partition plate made of a shielding material, and the partition plate and the A main printed board for controlling at least a storage means is provided between the base and the partition plate and a power supply unit for supplying power to the storage means and the main printed board is provided between the partition plate and the top plate. What is claimed is: 1. An electronic device having a storage means, further comprising a partition wall made of a shielding material between the power supply unit and the storage means. 2. An electronic device having a storage means according to claim 1, wherein the storage means is a magnetic storage means. 3. An electronic device having a storage means according to claim 2, wherein the storage means is a storage means having a floppy disk. 4. An electronic device having a storage means according to claim 2, wherein the storage means is a storage means having a hard disk. 5. A patent characterized in that the base has side sides facing the inner sides of the both side plates on both sides, and guides for restraining the main printed board from above and below are provided on the sides. An electronic device comprising a storage means according to claim 1. 6. The guide is constructed by cutting and raising the edges of at least two cutting lines provided on each side of the case toward the inside of the case.
An electronic device having a storage means as described in 1. 7. The base, the top plate, the side plates, and the back plate are made of a shielding material, and the end of the partition plate on the front plate side is bent toward the base. An electronic device having a storage means according to scope 1. 8. A storage device having a storage means according to claim 1 or 7, wherein the shielding material is a conductive material. 9. A storage device having storage means according to claim 1 or 7, wherein the shielding material is a magnetic material.