JPH09139139A - Accumulation-type keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an accumulating unit to be charged by obtaining electric energy by arranging a piezoelectric element in the interior of a key switch. SOLUTION: A piezoelectric element 3 is pressurized by means of contact of a shaft 2 in a key in a key switch 1 and the piezoelectric element 3, and electric power E occurs. The power which occurs in each key is collected to a collecter unit 5, then boosted up via a DC/DC converter 6. The power obtained thus is supplied to a battery unit 7. The power accumulated in an accumulating unit 7 can be used as electric energy by means of a control unit 8.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to
_{The present invention relates to a keyboard device, and more particularly,} to a power storage keyboard device used for inputting information.

[0002]

2. Description of the Related Art A notebook computer equipped with a conventional external battery, when not using an external power source,
It is powered by an external battery _and operates.

[0003]

In the [0006] above as a computer, that if external power is not used, power _is supplied from a battery mounted inside the computer, the operation time is limited to the charge amount of the battery There was a problem.

[0004]

The electric storage type keyboard device of the present invention is characterized in that the electric power generated from the piezoelectric element incorporated in the key is stored by the pressing operation of the key.

[0005] capacitor-type keyboard device of the present invention, a _key switch _{having a} plurality of keys arranged on the board, a shaft which is moved by the depressing operation the key is pressurized by depression operation the _key, the A piezoelectric element installed in the key, _a spring _for adjusting the contact distance between the shaft and the piezoelectric element, a current collector that collects the power generated by the key, and a power collected by the current collector. A DC / DC converter that raises the voltage to a chargeable level,
A power storage unit that stores electric power increased to a voltage that can be charged by the DC / DC converter and a control unit that supplies the electric power stored in the power storage unit are provided.

[0006]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic sectional view of an input device used in one embodiment of the present invention. Key switch 1 _is keystroke
The Rukoto _is, Ru shaft 2 in the key _{is pressed} down. At that time, the spring 4 arranged around the axis _{is used to} adjust the contact distance between the shaft 2 and the piezoelectric element 3. The piezoelectric element is pressed by the contact between the shaft 2 and the piezoelectric element 3, and the electric power _is supplied.
Occur.

FIG. 2 is a configuration diagram of a storage keyboard device according to an embodiment _{of the} present invention. The electric power generated in each key is collected in the current collector 5 and then boosted via the DC / DC converter 6. The electric power thus obtained is supplied to power storage unit 7. The electric power stored in the power storage unit 7 can be used as electric energy by the control unit 8.

[0009]

As described above, according to the present invention, the electric storage unit can be charged by arranging the piezoelectric element inside the key switch to obtain electric energy.

[Brief description of the drawings]

[1] _{of the} input _{device used in an embodiment of the} present invention
_{It is a} schematic cross-sectional view.

FIG. 2 is a configuration diagram of an embodiment of the present invention.

[Explanation of symbols]

 1 Key Switch 2 Axis 3 Piezoelectric Element 4 Spring 5 Current Collector 6 DC / DC Converter 7 Power Storage 8 Controller

Claims (2)

[Claims] 1. An electric storage type keyboard device characterized in that electric power generated from a piezoelectric element incorporated in a key is stored by depressing the key. 2. A plurality of keys arranged on a board
_{A key} switch _{having a key} , a shaft that moves when the key is pressed down _, a piezoelectric element installed in the key that is pressed by the key that is pressed down, and a contact distance between the shaft and the piezoelectric element is adjusted. a spring _for a collector unit for collecting power generated from the key, a DC / DC converter to increase until the rechargeable voltage power collected by the collector portions, rechargeable by the DC / DC converter An electric storage keyboard device, comprising: an electric storage unit that stores electric power increased to a certain voltage; and a control unit that supplies electric power stored in the electric storage unit.