Keyboard

Abstract

The invention relates to a keyboard which comprises an amplifying circuit, a piezo-electric transducer, a comparator, a delay and an electric switch, wherein, an input end of the amplifying circuit is connected with the piezo-electric transducer, an output end of the amplifying circuit is connected with a first input end of the comparator, a second input end of the comparator is grounded, a resistor is serially connected between the second input end of the comparator and a power end, an output end of the comparator is connected with a first end of the electric switch, a second end of the electric switch is grounded, a third end of the electric switch is connected with the power end through the delay, the piezo-electric transducer senses the pressure suffered by the keyboard, coverts the pressure into the voltage and inputs the voltage to a first input end of the comparator after being amplified, and the comparator compares two voltage values of the input end of the comparator and then outputs a level signal to control the power-on and the power-off of the electric switch so as to control the power-on and the power-off of the relay, thereby controlling whether an order is output by the keyboard or not. The invention can play shakeproof, locking and protecting roles to the keyboard of a computer, thereby preventing the misoperation and ensuring the order to be input stably and accurately.

Description

technical field [0001] The invention relates to a keyboard. Background technique [0002] Computer keyboard is a widely used input information instruction device, and also one of the most important input devices on servers, workstations and common personal computers. For data commands, keyboard makers have improved performance by improving key sensitivity and overall mechanics. However, as consumers' demand is getting higher and higher, the requirements for product reliability are becoming more and more stringent. Therefore, when some important running or testing programs are working on the computer, the operator will accidentally touch the button or some vibration shock , it is easy to cause the sudden interruption of the running or testing program. In this way, it will not only waste running or testing time, but also may cause serious economic losses, thus reducing the reliability of this type of equipment when used. Contents of the invention [0003] In view of the a...

AI Technical Summary

Problems solved by technology

However, as consumers' demand is getting higher and higher, the requirements for product reliability are becoming more and more stringent. Therefore, when some important running or testing programs are working on the computer, the operator will accidentally touch the button or some vibration shock , it is easy to cause the sudden interruption of the operation or test program

In this way, it will not only waste the running or testing time, but also may cause serious economic losses, thereby reducing the reliability of this type of equipment in use

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