JPH11317066A - Electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide electronic equipment limiting a discharge current occurring when the metallic parts of charged electric parts are brought into contact with the inner wall of the electronic equipment. SOLUTION: Electronic parts 2 are provided with metallic parts on its outside. When the metallic parts are charged, when the electronic parts 2 are inserted into electronic equipment 1, static electricity on the metallic parts is discharged, noise occures and there is possibility that the electronic equipment 1 malfunctions. For reducing a discharge current, an electric resistance body is provided on the bottom part in the vicinity of a port of the electronic equipment 1. When the electronic parts 2 are inserted into the electronic equipment 1, the metallic parts are grounded through the electric resistance body. Therefore, even when the metallic parts are charged, the discharge current can be limited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device in which, when an electronic component is inserted into an electronic device, static electricity charged on a metal portion of the electronic component is discharged via an electric resistor. is there.

[0002]

2. Description of the Related Art FIG. 5 is a view showing an example of electronic equipment and electronic parts. 1, reference numeral 1 denotes an electronic device, and 2 denotes an electronic component. The electronic component 2 is, for example, a flexible disk cartridge, and the electronic device 1 is, for example, a flexible disk drive. The electronic component 2 is inserted into the electronic device 1 when necessary.

FIG. 6 illustrates a shutter opening / closing mechanism. In the figure, 3 is a flexible disk cartridge, 4 is a metal protective shutter, 5 is a guide, 6 is a shutter opening / closing pin, 7 is the base of the flexible disk drive, and 8 is a window. When the flexible disk cartridge 3 is inserted into the flexible disk drive, the upper side of the cartridge 3 comes into contact with the guide pins 6 as shown in FIG. When the cartridge 3 is further inserted, the guide pin 6 moves diagonally to the upper left and thereby the protection shutter 4 moves to the left. When the cartridge 3 is further inserted, a window 8 appears as shown in FIG.

FIG. 7 is a view showing details of a drive side of a shutter opening / closing mechanism. FIG. 7 (a) shows a top view and FIG. 7 (b) shows a side view. In the figure, 9 is a shutter opening / closing pin
The reference numeral 10 denotes a spring, and 11 denotes a shaft.
The lower end of the shutter opening / closing pin 6 is fixed to the left end of the shutter opening / closing pin arm 9 so that the shutter opening / closing pin 6 is perpendicular to the shutter opening / closing pin arm 9. The upper end of the shaft 11 is fixed to the lower surface of the base 7 so that the shaft 11 extends vertically downward from the base 7. The shutter opening / closing pin arm 9 is mounted on the shaft 11 so that it can move to some extent. In FIG. 7A, the spring 10 always pulls the shutter opening / closing pin arm 9 counterclockwise.

[0005]

In a storage device using a storage medium having a metallic protective shutter, such as a floppy disk cartridge or an MO disk cartridge (magneto-optical disk cartridge), there is a case where a metallic device is used. When the storage medium is inserted into the storage device, the static electricity is discharged inside the storage device, and a noise signal is applied to an internal circuit of the storage device, which may cause a malfunction of the storage device. Was. The present invention has been made in view of this point, and provides an electronic device capable of reducing a discharge current generated when a charged metal part of an electronic component contacts an inner wall of the electronic device. The purpose is.

[0006]

According to the present invention, there is provided an electronic apparatus comprising:
In an electronic device into which an electronic component having a metal portion on the outside is inserted, an electric resistor is provided at a bottom, side, or upper portion near an electronic component insertion opening provided in the electronic device, and the electronic component is attached to the electronic device. The metal part of the electronic component comes into contact with the electric resistor when inserted.

According to a second aspect of the present invention, there is provided an electronic device in which an electronic component having a metal portion on the outside is inserted, wherein at least the surface is an electric resistor at the bottom, side, or top near the electronic component insertion opening. A plurality of ribs
When the electronic component is inserted into the electronic device, a metal portion of the electronic component comes into contact with the electric resistor.

According to a third aspect of the present invention, there is provided an electronic device in which an electronic component having a metal portion on the outside is inserted, at least a surface of which is an electric resistor at a bottom, side, or upper portion near the electronic component insertion opening. A plurality of partial protrusions are provided so that when the electronic component is inserted into the electronic device, a metal portion of the electronic component comes into contact with the electric resistor.

According to a fourth aspect of the present invention, there is provided an electronic apparatus wherein the protection shutter is opened by an internal shutter opening / closing mechanism when an electronic component having a metal protection shutter is inserted on the outside. An electric resistor is provided at a portion of the shutter opening / closing mechanism that engages with the shutter.

The operation of the first aspect of the present invention will be described.
For example, when a charged person touches a metal part of an electronic component, the metal part is charged. When an electronic component having a charged metal part is inserted into an electronic device, static electricity is discharged, noise is generated, and the electronic device may malfunction. Claim 1
According to the invention, the static electricity of the metal part of the electronic component is discharged via the electric resistance, so that the discharge current can be reduced and the noise can be reduced.

The operation of the second and third aspects will be described. When the electronic component is inserted into the electronic device, if the contact surface between the electronic component and the electronic device is flat, the electronic device and the electronic device come into full contact with each other, the frictional resistance increases, and the insertion becomes difficult. According to the second aspect of the present invention, since the rib and the electronic component are in contact with each other, the frictional resistance can be reduced. A similar effect can be obtained by the third aspect of the invention.

The operation of claim 4 will be described. Electronic components such as flexible disk cartridges and magneto-optical disk cartridges have a metal protective shutter. Electronic devices such as flexible disk drives and magneto-optical disk drives have a shutter opening / closing mechanism inside. have. When the electronic component as described above is inserted into the electronic device as described above, the shutter opening / closing mechanism opens the protective shutter. The shutter opening / closing mechanism has a portion that engages with the protective shutter. However, if the engaging portion is covered with an electric resistance film, the protection is performed when the charged metallic protective shutter and the shutter opening / closing mechanism are engaged. Since the static electricity of the shutter is discharged via the resistor, the discharge current can be limited.

[0013]

FIG. 1 is a view showing an embodiment of the present invention in which an electric resistance material is provided on a bottom plate. In the figure, 1
Is an electronic device, 2 is an electronic component, 12 is a bottom portion of the electronic device, 1
Reference numeral 3 denotes a mold panel, and 14 denotes an electric resistor.

The electronic component 2 is inserted into the electronic device 1.
The bottom 12 of the electronic device 1 is made of a metal body such as copper. On the upper surface of the bottom 12 near the insertion opening, a layered electric resistor 14 is provided. The electric resistor 14 is
For example, it is composed of a carbon-containing substance. When the electronic component 2 is inserted into the electronic device 1, the metal part of the electronic component 2 is electrically connected to the metal bottom 12 via the electric resistor 14. Therefore, even if the metal part of the electronic component is charged, the static electricity is grounded via the electric resistor 14, so that the discharge current can be limited. The mold panel 13 is a decorative panel for changing the color and design of a portion that can be seen from the outside such as a floppy disk device or MO device. Generally, it is often made of plastic.

FIG. 2 is a view showing an example of a linear rib, and FIG. 2A is a perspective view of a bottom plate provided with the rib.
FIG. 2B is a cross-sectional view of the rib. In the figure, 12 indicates a bottom plate of the electronic device, 14 indicates an electric resistor, and 15 indicates a linear rib. Bottom plate 12 near the electronic component insertion slot
Is provided with a plurality of ribs 15. The longitudinal direction of the rib 15 matches the insertion direction of the electronic component. In the illustrated example, a rib 15 is formed on the bottom plate 12, and a film-shaped electric resistor 14 is formed thereon. The film-shaped electric resistor 7 is formed, for example, by applying an electric resistance paint.

FIG. 3 is a view showing an example of a partial protrusion (fine projection). FIG. 3 (a) is a perspective view of a bottom plate provided with a partial protrusion, and FIG. 3 (b) is a partial protrusion. FIG. 3 (c) is a diagram showing another example of the cross section of the partial protrusion. In the figure, 12 indicates a bottom plate of the electronic device, 14 indicates an electric resistor, and 16 indicates a partial protrusion. The bottom plate 12 near the electronic component insertion opening has a plurality of partial bumps 1.
6 are provided. In the example of FIG. 3B, a plurality of partial ridges 16 are formed on the bottom plate 12, and a film-shaped electric resistor 14 is formed thereon. The film-shaped electric resistor 7 is formed, for example, by applying an electric resistance paint. In the example shown in FIG. 3C, the electric resistor 1 is placed on a flat bottom plate 12.
A plurality of partial ridges 16 consisting of four are provided.

FIG. 4 is a diagram for explaining a method of measuring the electric resistance. One end of a copper cylinder having a diameter of 3 mm is brought into contact with an electric resistor 14 on a bottom plate 12 (eg, copper) of an electronic component, and the other end of the copper cylinder is connected to one end of a battery via an ammeter. Is connected to the bottom plate 12. Resistance R of electric resistor 14
Is represented by R = E / A. E is the voltage of the battery, and A is the current flowing through the ammeter. In the present invention, the resistance of the electric resistor 14 is set to several tens of ohms to several kilo ohms. However,
The resistance is measured as shown in FIG.

The electronic components inserted into the electronic equipment include:
Flexible disk cartridge, magneto-optical disk cartridge, PCMCIA (Personal Computer M
emory Card Internatinal Association) card, IC card, etc.

In the example shown in FIG. 1, the electric resistor is provided at the bottom of the electronic component insertion slot provided in the electronic device. However, the electric resistor is provided on the side of the electronic component insertion port provided in the electronic device. An electric resistor may be provided above the electronic component insertion opening provided in the electronic device.

In the example of FIG. 2, the longitudinal direction of the linear rib coincides with the insertion direction of the electronic component. However, the longitudinal direction of the linear rib may be oblique to the insertion direction. The longitudinal direction may be perpendicular to the insertion direction. Further, the rib may be a free curve (for example, a sine curve) or a closed curve (for example, an elliptical shape).

For example, the flexible disk drive is provided with a shutter opening / closing mechanism for opening / closing a protection shutter of the flexible disk cartridge. May be. The shutter opening / closing pin 6, the shutter opening / closing pin arm 9, the spring 10, and the like can be made of metal.

[0022]

As is apparent from the above description, according to the present invention, since the discharge current is limited and the noise is reduced, it is possible to reduce malfunctions due to noise caused by discharge.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example in which an electric resistance material is provided on a bottom plate.

FIG. 2 is a diagram showing an example of a linear rib.

FIG. 3 is a diagram showing an example of a partial protrusion (fine projection).

FIG. 4 is a diagram illustrating a method of measuring electric resistance.

FIG. 5 is a diagram illustrating an electronic device and an electronic component.

FIG. 6 is a diagram illustrating a shutter opening / closing mechanism.

FIG. 7 is a view showing details of a drive side of a shutter opening / closing mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic device 2 Electronic component 3 Flexible disk cartridge 4 Protective shutter made of metal 5 Guide 6 Shutter open / close pin 7 Flexible disk drive base 8 Window 9 Shutter open / close pin arm 10 Spring 11 Axis 12 Bottom of electronic device 13 Mold panel 14 Electrical resistor 15 Linear rib 16 Partial bump

Continued on the front page (72) Inventor Yukio Keida 98, Unoki-nu, Unoki-cho, Hebei-gun, Ishikawa Pref. Inside PFU Co., Ltd. (72) Inventor Hisashi Yoshinaga 4-1-1-1 Kamidadanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture Fujitsu Limited

Claims (4)

[Claims] 1. An electronic device into which an electronic component having a metal portion on the outside is inserted, wherein an electric resistor is provided at a bottom, side, or upper portion near an electronic component insertion opening provided in the electronic device, wherein the electronic component is provided. Wherein the metal part of the electronic component comes into contact with the electric resistor when the electronic component is inserted into the electronic device. 2. An electronic device into which an electronic component having a metal part on the outside is inserted, wherein a plurality of ribs, at least a surface of which is an electric resistor, are provided on the bottom, side, or top near the electronic component insertion opening. Provided, when inserting the electronic component into the electronic device,
An electronic device, wherein a metal portion of the electronic component is in contact with the electric resistor. 3. An electronic device into which an electronic component having a metal part on the outside is inserted. An electronic device, wherein a protrusion is provided so that when the electronic component is inserted into the electronic device, a metal portion of the electronic component comes into contact with the electric resistor. 4. An electronic device in which an electronic component having a metal protective shutter is inserted on the outside, wherein the internal shutter opening / closing mechanism opens the protective shutter, wherein the shutter engages with the protective shutter. An electronic device, wherein an electric resistor is provided in a portion of an opening / closing mechanism.