JP3115140B2 - Data input device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data input device having a function of discharging static electricity accumulated in a human body.

[0002]

2. Description of the Related Art In recent years, with the development of information processing devices, keyboards have been used as data input devices for transmitting information between humans and machines. The keyboard has many data input keys, and when a key is pressed with a human finger, data displayed on the key is input.

[0003] Human bodies often accumulate static electricity. When a person who has accumulated static electricity touches the keyboard,
Electric discharge occurs between the human body and the keytop, and this gives noise to an electric circuit inside the keyboard or inside the computer. Loud noise can cause your computer to malfunction,
Or stop. For this reason, a portion that is considered to be touched first by an operator is connected to the ground, and when a person swings to that portion, static electricity can be released to the ground.

For example, in Japanese Utility Model Laid-Open No. 59-62699, in an electronic apparatus having a switch, a portion of the switch that a person touches is made of a conductive material, and a metal piece is brought into sliding contact with a movable portion of the switch. An electronic device in which this metal piece is connected to ground via a resistor is disclosed. Japanese Patent Application Laid-Open No. 60-97420 discloses a keyboard in which a key top is made of a conductive material and the key top is connected to the ground by an electric wire. Also,
This gazette discloses that a fixed key holder facing a movable key top is connected to the ground, and when the key top is pressed, the key top comes into contact with the key holder to release static electricity. Further, in the recent prior application of the present application, in a keyboard having a link that movably connects a key top to a support panel, the key top is electrically connected to the support panel via the link, and static electricity is transferred to the support panel. Propose to escape to the ground through.

[0005]

In this way, a portion touched by a person can be connected to the ground, and static electricity can be released to the ground. However, connecting the electric wire directly to the key top of the keyboard has problems in terms of wiring and operability. In addition, sliding a metal piece, which is a member separate from the switch, into sliding contact with the keytop of the keyboard not only causes poor operability of the keys and the switch, but also may cause poor contact between these members. In addition, there is a problem in that if a contact failure occurs, static electricity cannot be released.
Also, if the key top is pressed and comes into contact with the key holder, just touching the key top a little by a person does not necessarily mean that the key top will come into contact with the key holder.
Static electricity cannot be reliably released.

[0006] A discharge current flows when static electricity accumulated in a person is released to the ground. If the discharge current is too high, the finger may feel irritation. Therefore, it is necessary that there is a resistor between the keytop and the ground that can control the current to an appropriate value. Also, if the value of this resistor is too large,
Static electricity cannot be properly released. Therefore, for example, the Swedish ESD standard specifies that the resistance of an electrostatic leakage circuit between a keytop and a ground should be within a range of 10 to 500 MΩ.

An object of the present invention is to provide a data input device which can reliably discharge static electricity to the ground with a simple configuration. Another object of the present invention is to provide a data input device capable of appropriately setting a resistance of an electrostatic leakage circuit between a keytop and a ground.

[0008]

The data input device according to the present invention includes a support panel 6 and at least one data input key 52 attached to the support panel.
A switch element provided on the support panel, a key top manually operable to open and close the switch element, and a biasing key top moving away from the support panel; Coil spring 10
And the coil spring is arranged on the side of the switch element 5.
At least a portion of the key top 1 is made of a conductive material, one end of the coil spring is in contact with the at least a portion of the key top, the other end of the coil spring is connected to ground , Form between the key top and ground
A resistor that adjusts the resistance of the formed electrostatic leakage circuit
It is characterized in Rukoto equipped with (12). Also,
In place of the above resistor, a key top with a resistance of 10 to 50 MΩ
As a structure made of high-resistance conductive resin with resistance
Is also good.

[0009]

In the above construction, the coil spring is always in contact with the key top, and an electrostatic leakage circuit is formed from the key top to the ground via the coil spring. Therefore, at the moment when a person touches the keytop, static electricity accumulated in the person reliably flows to the ground. This coil spring also acts as a return spring that urges the key top in the direction away from the support panel,
There is no strange feeling to operate the key top.

When the switch element is formed of a membrane switch, one of the embodiments for forming an electrostatic leakage circuit is to provide an opening at a position of a coil spring of the membrane switch so that one end of the coil spring contacts the key top and the other end. Make contact with the support panel.
The support panel is usually connected to ground for electromagnetic shielding.

In the case where the switch element is formed of a membrane switch, another embodiment of forming an electrostatic leak circuit is to provide a wiring for the electrostatic leak circuit in the membrane switch so that one end of a coil spring contacts a key top. Make the other end contact the wiring of the membrane switch. The wiring of the membrane switch is connected to the ground.

The key top is at least partially made of a conductive material, for example, metal or conductive resin. The conductive resin is obtained by mixing minute particles of a conductive material into a resin material. The conductive resin is preferable because the resistance can be controlled in the range of about 10 KΩ to several 100 MΩ depending on the mixing ratio of fine conductive material particles. Therefore, if the keytop is made of a conductive resin, the static electricity leak circuit itself can have a desired resistance value. That is, in this case, the key top is formed of a high-resistance conductive resin having a resistance of 10 to 500 MΩ.

However, in the case of a high-resistance conductive resin, if the distribution of fine particles of the conductive material is uneven, the resistance value may vary from place to place. In order to prevent the resistance value from fluctuating, it is preferable that the key top is formed of a low-resistance conductive resin having a resistance of 1 MΩ or less. In this case, a resistance of 10 to 500 MΩ is inserted between the support panel and the ground. The installation position of this resistor can be variously selected.

[0014]

FIG. 1 is a sectional view showing a first embodiment of the present invention, and shows a key 52 of a data input device. FIG. 5 shows a keyboard 50 as a data input device. The keyboard 50 has a plurality of keys 51 such as character keys, numeric keys, and control keys, and a space key 52. The space key 52 is the largest and most frequently used key, and is provided at a position where it is most easily used. Normal,
The space key 52 is operated first. For this reason, in the present invention, an electrostatic leakage circuit is formed in the space key 52. However, it is also possible to form an electrostatic leakage circuit on the other keys 51.

In FIG. 1, the space key 52 comprises a key top 1 which can be manually operated, a slider 2 connected to a lower surface of the key top 1, and a membrane switch 5 as a switch element opened and closed by the slider 2. .
The keyboard has a metal support panel 6, and the membrane switch 5 is attached to the upper surface of the support panel 6. Further, a rubber actuator 22 is provided on the membrane switch 5, and a rubber actuator 2 is provided.
2, a switch panel 23 is provided. The switch panel 23 is mounted on the support panel 6 and slidably guides the slider 2 of the key top 1.
Having. Such a configuration is common to the other keys 51.

As shown in FIG. 4, the membrane switch 5 comprises a first resin layer 54 having contacts 53 at positions corresponding to a plurality of keys, and A second resin layer 56 having a contact 55 provided corresponding to the contact 53; and first and second resin layers 54, 56
And a spacer 57 inserted between them. The contact 53 of the first resin layer 54 is connected to, for example, a wiring pattern 58 extending left and right in FIG. 4, and the contact 55 of the second resin layer 56 is connected to a wiring pattern (shown in FIG. 4) extending in a direction perpendicular to the plane of FIG. )). These wiring patterns are connected to the control circuit board of the keyboard.

The contacts 53 and 55 in FIG. 4 are located below the slider 2 of the key top 1 of the space key 52 in FIG. The membrane switch 5 (that is, the first and second resin layers 54 and 56 and the spacer 57) has openings 59 at positions on both sides of these contacts 53 and 55. The opening 59 allows the coil spring 10 to be described later to pass therethrough.

In the operation of the membrane switch 5,
When the slider 2 is pushed downward together with the keytop 1,
The slider 2 pushes down the upper contact 53 to bring the contact 53 into contact with the contact 55. This closes the switch. As shown in FIG. 1, the inverted cup-shaped member 22a of the rubber actuator 22 is actually located between the slider 2 and the membrane switch 5, and the slider 2 pushes the membrane switch 5 via the inverted cup-shaped member 22a. . The inverted cup-shaped member 22 a is elastic and has a function of pushing up the slider 2 when a finger is separated from the key top 1.
Instead of the rubber actuator 22, a spring may be arranged in the housing 3.

In the embodiment shown in FIG. 1, two coil springs 10 are provided on both sides of the slider 2 of the key top 1. As described above, the membrane switch 5 has the two openings 59, and the rubber actuator 22 and the switch panel 23 have the openings 6 at the same positions as the openings 59.
0 and 61 are provided. Therefore, one end of the coil spring 10 contacts the key top 1, and the other end of the coil spring 10 contacts the support panel 6. The support panel 6 is connected to the ground electrode 13 of the circuit board 11 by the metal fitting 9. The circuit board 11 is, for example, a circuit board for controlling a keyboard. Therefore, an electrostatic leak circuit is formed from the keytop 1 to the ground electrode 13 through the coil spring 10 and the support panel 6. As soon as a person touches the keytop 1, static electricity accumulated in the person reliably flows to the ground.

For this reason, in the present invention, the entire key top 1 or the portion of the key top 1 that comes into contact with the coil spring 10 is made of a conductive material such as a metal or a conductive resin. The conductive resin is obtained by mixing fine particles of a conductive material such as aluminum, silver, or carbon into an ABS resin material. The conductive resin is preferable because its resistance can be controlled in the range of several tens of KΩ to several hundred MΩ depending on the mixing ratio of fine conductive material particles.

In the embodiment shown in FIG. 1, the key top 1 is formed of a high-resistance conductive resin having a resistance of 10 to 500 MΩ. In the Swedish ESD standard, key top 1
The resistance of the electrostatic leak circuit between the ground and the ground is 10 to 5
It is specified that it should be within the range of 00 MΩ, and the resistance value of the key top 1 satisfies this standard.

In FIG. 1 and FIG.
, A long substantially C-shaped link 4 for movably connecting the support panel 6 and the key top 1 is provided. A bearing 7 for rotatably supporting the shaft of the link 4 is attached to the keytop, and a link holder 8 having a groove 8a for slidably receiving the tip of the link 4 is attached to the support panel 6. Therefore, when the key top 1 moves up and down, the shaft of the link 4 rotates in the bearing 7, and the tip of the link 4 slides in the groove 8 a of the link holder 8, while the key top 1 moves. regulate. That is, even if the end of the key top 1 of the large space key 52 is pressed, the entire key top 1 moves parallel to the support panel 6.

FIG. 2 is a sectional view showing a second embodiment of the present invention, in which a space key 52 is shown. In FIG.
As in the previous embodiment, the space key 52 includes a key top 1, a slider 2 coupled to a lower surface of the key top 1,
And a membrane switch 5. The membrane switch 5 is attached to a metal support panel 6, and a rubber actuator 22 and a switch panel 23 are arranged on the membrane switch 5. The switch panel 23 has a housing 3 for guiding the slider 2 slidably. A link 4 is provided between the support panel 6 and the keytop 1.

In FIG. 2, two coil springs 10 are provided on both sides of the slider 2 of the key top 1. The membrane switch 5 has two openings 59,
The rubber actuator 22 and the switch panel 23 also have openings 60 and 61 at the same position as the opening 59. Therefore, also in this case, one end of the coil spring 10 contacts the key top 1 and the other end contacts the support panel 6. The support panel 6 is connected to the electrodes 11 of the circuit board 11 by the metal fittings 9.
a, and the electrode 11 a is connected to the ground electrode 13 via the resistor 12. Therefore, an electrostatic leakage circuit is formed from the keytop 1 to the ground electrode 13 through the coil spring 10 and the support panel 6. As soon as a person touches the keytop 1, static electricity accumulated in the person reliably flows to the ground.

In this embodiment and other embodiments, the key top 1 is made of a conductive resin. However, in the case of conductive resin, if the distribution of fine particles of conductive material is uneven, the resistance value may vary from place to place. The resistance value varies depending on the location, and the resistance value of the electrostatic leakage circuit changes depending on the position where the coil spring 10 contacts. This occurs when the key top 1 is made of a high-resistance conductive resin as in the first embodiment.

In the embodiment shown in FIG. 2, the key top 1 is formed using a conductive resin having a low resistance of 1 MΩ or less. A resistor 12 of 10 to 500 MΩ is arranged in series with the key top 1. Therefore, this static electricity leak circuit has no fluctuation of the resistance value, and the Swedish ESD
Meets standards. Conductive resins are more expensive than non-conductive resins. In the present invention, only the key top 1 is made of an expensive conductive resin, and other resin parts are made of an inexpensive non-conductive resin. The coil spring 10 is made of metal.

FIGS. 6A and 6B are views showing a main part of a third embodiment of the present invention, wherein FIG. 6A is a plan view, and FIG.
FIG. FIG. 6 shows only the key top 1, and the configuration of the other parts is the same as that of the first or second embodiment. The key top 1 is formed of a conductive resin 14 so as to penetrate a portion thereof, that is, a portion from the surface of the key top to a portion in contact with the coil spring, and the other portion is formed of a normal non-conductive resin. This reduces the amount of expensive conductive resin used. Note that the portion of the conductive resin 14 of the key top 1 may be formed of metal.

FIG. 7 is a diagram showing a fourth embodiment of the present invention. This embodiment is an example of a small key switch using a simple push button switch 16 instead of a membrane switch. 15 is a switch button, 16 is a push button switch, 17 is a circuit board, and 18 is a cover. The switch button 15 is made of a conductive resin,
The ground electrode 19 of the circuit board 17 is formed by the coil spring 10.
Is electrically connected to Also in this configuration, static electricity can be released through the switch button 15, the coil spring 10, and the ground electrode 19. Since it is small, it can be used for a mouse or the like, and can have an electrostatic discharge function.

FIG. 8 is a sectional view showing a fifth embodiment of the present invention. FIG. 8 corresponds, for example, to a cross section through the coil spring 10 of FIG.
Is not shown. 8, the membrane switch 5, the rubber actuator 22, and the switch panel 23
Are provided with openings 59, 60 and 61, respectively, so that one end of the coil spring 10 contacts the key top 1 and the other end of the coil spring 10 contacts the support panel 6. And the metal cap 20 is the key top 1 and the coil spring 1
0, the contact area between the metal cap 20 and the key top 1 is larger than the contact area between the metal cap 20 and the coil spring 10. Therefore, even if the conductivity of the key top 1 made of a conductive resin is uneven depending on the location, the key top 1 and the coil spring 10 are reliably electrically connected.

FIG. 9 shows a sixth embodiment of the present invention, and is a sectional view similar to FIG. In FIG. 9, the metal cap 2
0 has a screw portion 21 and a screw hole 1 provided in the key top 1
a. According to this, the contact pressure between the metal cap 20 and the key top 1 increases,
In addition, since the contact area between the metal cap 20 and the key top 1 increases, the electrical connection between the key top 1 and the coil spring 10 is ensured.

FIG. 10 shows a seventh embodiment of the present invention.
It is sectional drawing similar to. In FIG. 10, a projection 1b is formed on the lower surface of the key top 1, and the coil spring 10 is fixed to the projection wall 1b by press fitting. According to this, the contact pressure between the coil spring 10 and the key top 1 increases. Note that a concave wall may be provided on the lower surface of the key top 1 instead of the convex wall 1b, and the coil spring 10 may be fixed by press-fitting inserted into the concave wall.

FIG. 11 shows an eighth embodiment of the present invention.
It is sectional drawing similar to. In FIG. 11, the coil spring 10 is fixed to the lower surface of the keytop 1 by press-fitting the convex wall portion 1b, and a conductive rubber 24 is attached to the surface of the support panel 6 at the lower end of the coil spring 10. The conductive rubber 24 has a resistance of 10 to 500 MΩ and is provided in place of the resistor 12 shown in FIG.

In the configuration of FIG. 2, since the resistor 12 is outside the support panel 6, the support panel 6 is grounded through a high resistance. For this reason, the shield performance of the support panel 6 is reduced. As shown in FIG.
The conductive rubber 24 having a predetermined resistance is applied to the support panel 6.
, The shield performance of the support panel 6 does not decrease.

FIG. 12 is a sectional view showing a ninth embodiment of the present invention. If the conductive rubber 24 of FIG. 11 is thin, it may be difficult to provide a predetermined resistance value. In order to deal with this, in FIG.
It is provided inside. In FIG. 12, as in the embodiment of FIGS. 1 and 2, the space key 52 includes a key top 1 and a slider 2 coupled to the lower surface of the key top 1.
And a membrane switch 5. The membrane switch 5 is attached to a metal support panel 6, and a rubber actuator 22 and a switch panel 23 are arranged on the membrane switch 5. Switch panel 2
3 has a housing 3 for slidably guiding the slider 2.

In FIG. 12, two coil springs 10
Are provided on both sides of the slider 2 of the key top 1.
However, the membrane switch 5 and the rubber actuator 22 have no opening through which the coil spring 10 passes, and the opening 61 is provided only in the switch panel 23. Therefore, in this case, one end of the coil spring 10 contacts the key top 1 and the other end contacts the rubber actuator 22.

Coil spring 10 of rubber actuator 22
The wiring 65 is provided at the position where the contact is made. A metal plate can be provided instead of the wiring 65. There is a wiring 66 spaced from the wiring 65, and the resistor 12 is connected to the wiring 65 and the wiring 6
6 is arranged. Further, the wiring 66 is connected to the support panel 6 by a pin-shaped fitting 67 that passes through the membrane switch 5 and the rubber actuator 22. The support panel 6 is connected to the electrode 11a of the circuit board 11 by the metal fitting 9, and this electrode 11a is connected to the ground electrode 1
3 is connected. Therefore, an electrostatic leakage circuit from the key top 1 to the ground electrode 13 through the coil spring 10, the wiring 65, the resistor 12, the wiring 66, the metal fitting 67, and the support panel 6 is formed.

FIG. 13 is a sectional view showing a tenth embodiment of the present invention. In FIG. 13, the resistor 12 is outside the support panel 6, but is connected to the ground electrode 13 separately from the support panel 6. In FIG. 13, two coil springs 10 are provided on both sides of the slider 2 of the key top 1. However, the membrane switch 5 has no opening through which the coil spring 10 passes, and the rubber actuator 2
2 and the switch panel 23 are provided with openings 60 and 61. Therefore, in this case, one end of the coil spring 10 contacts the key top 1 and the other end contacts the membrane switch 5.

A wire 70 is provided at a position where the coil spring 10 of the membrane switch 5 contacts. More specifically, the upper first resin layer 54 of FIG. 4 has an opening through which the coil spring 10 passes, and the lower second resin layer 56 is provided with the wiring 70. The wiring 70 is connected to the electrode 11 a of the circuit board 11 and other electrodes by the connector 71 together with the membrane switch 5. Electrode 11a leading to wiring 70
Are connected to the ground electrode 13 via the resistor 12.
On the other hand, the support panel 6 is attached to the circuit board 11 by the metal fitting 9.
To the ground electrode 13. Therefore, since no resistance enters between the support panel 6 and the ground, the shielding effect of the support panel 6 does not decrease.

FIG. 14 is a view showing an eleventh embodiment of the present invention. In FIG. 14, a keyboard 50 having the above-described keys is connected to the computer main body 27 by a cable 26. Ground electrode 13 of keyboard 50
Is connected to a ground electrode (not shown) of the computer main body 27 by a cable 26. 18 is a keyboard 50
This is the case.

[0040]

According to the present invention, it is possible to obtain a data input device capable of reliably discharging static electricity with a simple structure.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

FIG. 4 is an enlarged sectional view of the membrane switch of FIG. 1;

FIG. 5 is a diagram illustrating an example of a keyboard.

FIG. 6 is a view showing a main part of a third embodiment of the present invention, and FIG.
6B is a plan view, and FIG. 6B is a cross-sectional view taken along line VIBBVIB in FIG.

FIG. 7 is a diagram showing a fourth embodiment of the present invention.

FIG. 8 is a diagram showing a fifth embodiment of the present invention.

FIG. 9 is a diagram showing a sixth embodiment of the present invention.

FIG. 10 is a diagram showing a seventh embodiment of the present invention.

FIG. 11 is a diagram showing an eighth embodiment of the present invention.

FIG. 12 is a diagram showing a ninth embodiment of the present invention.

FIG. 13 is a diagram showing a tenth embodiment of the present invention.

FIG. 14 is a diagram showing an eleventh embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Key top 2 ... Slider 5 ... Membrane switch 6 ... Support panel 10 ... Coil spring 12 ... Resistor 13 ... Ground electrode

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G06F 3/02 310 H01H 13/70

Claims (20)

(57) [Claims] 1. A support panel (6), and at least one data input key (52) attached to the support panel (6), wherein the data input key is provided on the support panel (6). Switch element (5), a key top (1) that can be manually operated to open and close the switch element (5), and biases the key top (1) away from the support panel (6). and a coil spring (10), the coil
A spring is arranged on the side of the switch element (5), at least a part of the key top (1) is made of a conductive material, and one end of the coil spring (10) is connected to the key top (1).
The coil spring (10)
Is connected to the ground , and further connected to the key top.
Adjust the resistance of the electrostatic leakage circuit formed between the grounds.
Data input apparatus according to claim Rukoto comprising resistor to clause (12). 2. The data input device according to claim 1, wherein at least a part of the key top connected to the ground by the coil spring is made of metal. 3. A method in which at least a part of the key top (1) connected to the ground by the coil spring (10) is made of a conductive resin obtained by mixing fine conductive material particles into a resin material. The data input device according to claim 1, wherein: 4. The data input device according to claim 3, wherein the entire key top is made of a conductive resin. 5. A data input device comprising: a plurality of character keys;
1) and at least one space key (52), wherein at least a part of the key top (1) of the space key is made of a conductive material and is grounded by the coil spring (10). The data input device according to claim 1, wherein the data input device is connected. 6. The space key (52) includes a slider (2) coupled to the key top (1), and a link (movably) connecting the support panel (6) and the key top (1). 4) and a coil spring (1) for urging the key top (1) in a direction away from the support panel (6).
0), wherein the two coil springs (10) are provided on both sides of the slider, and the support panel (6) has a fixed switch panel having a housing (3) for slidably guiding the slider. The data input device according to claim 5, wherein (23) is attached. 7. The switch element (5) includes a first layer having a contact, a second layer having a contact provided corresponding to the contact of the first layer, the first and the second layers. A membrane switch comprising a spacer inserted between the two layers, the membrane switch being disposed between the switch panel and the support panel, wherein the switch panel and the membrane switch pass through the coil spring (10). An opening is provided, and one end of the coil spring (10) contacts the key top (1) and the other end contacts the support panel, and the key top (1) is connected to the coil spring (10).
7. The data input device according to claim 6, wherein the data input device is connected to a ground via the support panel. 8. The switch element (5) includes a first layer having a contact, a second layer having a contact provided corresponding to the contact of the first layer, the first layer and the first layer. A membrane switch comprising a spacer inserted between the two layers, wherein the membrane switch comprises a switch panel (23).
And the support panel (6), wherein the switch panel has an opening through which the coil panel (10) passes;
The membrane switch has a wiring connected to a ground, and one end of the coil spring (10) is connected to the key top (1).
And the other end contacts the wiring of the membrane switch, and the key top (1) is connected to the coil spring (1).
7. The data input device according to claim 6, wherein the data input device is connected to the ground via the wiring of the membrane switch. 9. The data input key (52) includes a slider (2) coupled to the key top (1), and a coil spring for urging the key top (1) in a direction away from the support panel (6). A fixed switch panel (23) having a housing (3) for slidably guiding the slider is attached to the support panel (6). 2. A data input device according to claim 1. 10. The switch element (5) includes a first layer having a contact, a second layer having a contact provided corresponding to the contact of the first layer, the first and the second layers. A membrane switch comprising a spacer inserted between two layers, wherein the switch panel and the membrane switch have an opening through which the coil spring (10) passes, and the coil spring (1
One end of 0) contacts the key top (1) and the other end contacts the support panel, and the key top (1) is connected to the ground via the coil spring (10) and the support panel. 10. The method according to claim 9, wherein
2. A data input device according to claim 1. 11. The switch element (5) includes a first layer having a contact, a second layer having a contact provided corresponding to the contact of the first layer, the first and the second layers. A membrane switch comprising a spacer inserted between two layers, the switch panel having an opening through which the coil panel (10) passes, and the membrane switch having a wiring connected to a ground, One end of the coil spring (10) contacts the key top (1) and the other end contacts the wiring of the membrane switch, and the key top (1) is grounded via the coil spring (10) and the membrane switch. 10. The data input device according to claim 9, wherein the data input device is connected. 12. The key top (1) is connected to ground via the coil spring (10) and the support panel, and the key top (1) is formed of a low-resistance conductive resin having a resistance of 1 MΩ or less. The resistor (12) is inserted between the support panel (6) and the ground , and
2. The device according to claim 1, wherein the resistor has a resistance of about 500 MΩ.
2. A data input device according to claim 1. 13. The key top (1) is connected to ground via the coil spring (10) and the support panel, and the key top (1) is formed of a low-resistance conductive resin having a resistance of 1 MΩ or less. The resistor (12) is inserted between the coil spring (10) and the support panel (6).
The data input device according to claim 1, wherein the data input device has a resistance of 10 to 500 MΩ . 14. A switch element comprising: a first layer having a contact; a second layer having a contact provided in correspondence with the contact of the first layer; A membrane switch comprising a spacer inserted between the two layers, the membrane switch having a wiring connected to the ground, one end of the coil spring (10) being in contact with the key top (1), The other end contacts the wiring of the membrane switch, the key top (1) is connected to ground via the coil spring (10) and the wiring of the membrane switch, and the key top (1) has a resistance of 1 MΩ or less. Formed of a low-resistance conductive resin having the resistance
A vessel (12) is inserted between the coil spring (10) and the wiring of the membrane switch and has a resistance of 10 to 500 MΩ.
Data input device according to claim 1, characterized in that. 15. The switch element (5), comprising: a first layer having a contact; a second layer having a contact provided corresponding to the contact of the first layer; A membrane switch comprising a spacer inserted between two layers, the membrane switch having wiring, one end of the coil spring (10) contacting the key top (1), and the other end thereof being the membrane. The key top (1) contacts the switch wiring, and the key top (1) is connected to the ground via the coil spring (10), the wiring of the membrane switch, and the support panel (6), and the key top (1) is 1 MΩ or less. is formed of a low resistance of the conductive resin having a resistance, the
A resistor (12) is inserted between the wiring of the membrane switch and the support panel (6) and has a resistance of 10 to 500 MΩ.
The data input device according to claim 1, wherein the data input device has resistance . 16. The device further comprises a circuit board, wherein the switch element (5) has a first layer having contacts,
A second layer having contacts provided corresponding to the contacts of the first layer and a spacer inserted between the first and second layers, and the membrane switch has a wiring. One end of the coil spring (10) contacts the key top (1) and the other end contacts the wiring of the membrane switch, and the key top (1) connects the wiring of the coil spring (10) and the membrane switch. And the key top (1) is formed of a low-resistance conductive resin having a resistance of 1 MΩ or less, and the resistor (12) is connected to the wiring of the membrane switch and the circuit. Inserted between substrates , 10 to 500 MΩ
The data input device according to claim 1, wherein the data input device has a resistance of: 17. A metal member is interposed between the key top (1) and the coil spring (10), and a contact area between the metal member and the key top (1) is different from that of the metal member and the coil spring (10). 2. The data input device according to claim 1, wherein the area is larger than the area of the contact portion. 18. The data input device according to claim 1, wherein said coil spring (10) is fixed to a wall provided at the bottom of said key top (1) by press-fitting. 19. The data input device is connected to a data processing device, and the key top (1) is connected to the coil spring (10).
2. The data input device according to claim 1, wherein the data input device is connected to a ground of the data processing device via a terminal. 20. A support panel (6) and said support
At least one data attached to the panel (6)
An input key (52), The data input key is provided on the support panel (6).
Opened switch element (5) and switch element (5)
A key top (1) that can be manually operated to close the key;
-Move the top (1) away from the support panel (6)
A coil spring (10) biasing in the direction,
A spring is arranged beside the switch element (5) and the key
At least a part of the top (1) is made of a conductive material
And one end of the coil spring (10) is connected to the key top (1).
The coil spring (10)
Is connected to the ground, and the key top (1) is
Formed with high-resistance conductive resin having a resistance of 0 to 500 MΩ
A data input device characterized by being formed.