CN204009764U - The tactile keyboard that transistor-type amplifies - Google Patents

Abstract

The tactile keyboard that transistor-type amplifies, belong to dynamo-electric combination technology field, a kind of new measure is proposed, form the keyboard matching with computer, by touch-key dish skeleton, tactile keyboard button, transistor amplifier circuit, operation circuit in keypad forms jointly, improve the performance of computor-keyboard, the corresponding transistor amplifier circuit of each button in keyboard, by integrated each transistor amplifier circuit, corresponding with each button, when hand contact button, produce touch signal, after transistor amplifier circuit amplifies, its output has connected the operation circuit in keypad, by integrated corresponding each button transistor amplifier circuit, connect after corresponding button, put in touch-key dish skeleton with together with operation circuit in button, form and touch work keyboard, overcome the existing button of mechanical keyboard blunt, sensitivity is not high, the problems such as card key, promote the quality of keyboard, allow people use comfortablely.

Description

The tactile keyboard that transistor-type amplifies

Technical field

Belong to dynamo-electric combination technology field.

Background technology

Computer has become people understands the important tool of external world, and it is important office accommodations, is also the important tool of Entertainment, and in informationalized today, computer has become one family, the requisite article of company.

Keyboard is the indispensable parts of computer, and people process document, and recording events all needs it, now computor-keyboard is all mechanical button form, use of a specified duration can to produce contact ineffective, or a button presses down, but bullet comes up again, form the problem of card key, or button is blunt, uses very large dynamics button could be pressed to inferior these situations, particularly in processing document or recording events, occurring these problems, for user, is least to wish to produce.

And to thoroughly eradicate this situation, and can only eradicate this physical construction of keyboard, be key to be pressed rear downwards, fulfil again and pop up recovery routine without key.Also be that keyboard is innovated thoroughly, mechanical key structure that both need not be such, also need not this simple on-off mode.Thereby the place relating to is many, need to solve a multiple technologies difficult problem.

Summary of the invention

Propose a kind of new measure, form the keyboard matching with computer, after enforcement, overcome the problems such as the existing button of mechanical keyboard is blunt, sensitivity is not high, card key, improve the performance of computor-keyboard, allow user use comfortablely.

The technical solution used in the present invention is:

1, transistor-type amplify tactile keyboard by touch-key dish skeleton, tactile keyboard button, transistor amplifier circuit, the operation circuit in keypad forms jointly.

Wherein: transistor amplifier circuit is made up of preamplifier state, power-amplifier stage, electronic relay: the collector resistance of NPN triode, PNP triode, NPN triode has formed power-amplifier stage.

Preamplifier state is a triode, preposition amplifying triode by name, the input that tactile keyboard button extension line connects preamplifier state is the base stage of preposition amplifying triode, collector connects power supply, the emitter of preposition amplifying triode is that the input of the output connection power-amplifier stage of preamplifier state is the base stage of NPN triode, the grounded emitter of NPN triode, the collector resistance of NPN triode is connected with the base stage of PNP triode, the emitter of PNP triode connects power supply, the control line bud of the collector connecting electronic relay of PNP triode, often the opening two contacts and become the output of transistor amplifier circuit of electronic relay, connect the operation circuit in keypad.

Each button on tactile keyboard is connected with a transistor amplifier circuit.

All circuit use integrated technique, make integrated circuit, then put in touch-key dish skeleton.

2, electronic relay is COMS integrated circuit.

3, the withstand voltage of preposition amplifying triode should be greater than 70V.

The now meaning to each technical measures of the present invention, concrete condition is further explained as follows:

One, the explanation of transistor amplifier circuit:

Transistor amplifier circuit is made up of preamplifier state, power-amplifier stage, electronic relay, and the each button in keypad needs to connect a transistor amplifier circuit.

1, transistor amplifier circuit, can be by faint touch signal, amplify and be converted into available electric signal, each wire of keyed jointing of pressing in keypad, connect the preamplifier state in each transistor amplifier circuit, when hand contact button, produce touch signal, through preamplifier state amplify, again after power-amplifier stage, successfully start electronic relay.

2, in transistor amplifier circuit, preamplifier state is a large power triode, adopted the form of penetrating with output, power-amplifier stage is the form that has formed electronic switch with NPN triode and PNP triode, and its benefit is that enlargement factor is high, as long as preposition amplifying triode has had electric weight, even very faint, can produce very strong amplification quantity through amplifier stage, amplification effect is good, substantially do not need debugging, and triode is not fragile.

Two, produce the physical process of touch key-press formation break-make:

In the time of button corresponding to finger contact, the touch signal of human body is incorporated into the preamplifier state of transistor amplifier circuit by wire, it is the base stage of preposition amplifying triode, thereby make preamplifier state have signal, this signal is through after power amplification below, the line bag of complete energy excited electrons relay also makes it to produce a high position, and result is that the normally opened contact that electronic relay line bag is corresponding changes connection into by often opening like this.Due to the two ends of normally opened contact, connected two line ends that the corresponding keyswitch of former mechanical keyboard connects, so while adopting hand to touch contact, with adopt mechanical key downwards by effect be equal to.Otherwise in the time that hand pine is pasted button, or while leaving button, its touch signal is very weak, electronic relay normally open contact disconnects, and is equivalent to mechanical key and upwards recovers the effect disconnecting.

Three, corresponding each button transistor amplifier circuit is made to integrated form, institute is corresponding with each button, the output of the transistor amplifier circuit that each button is corresponding connects the operation circuit of keyboard, because transistor amplifier circuit circuit is simple, without debugging, make integrated after, volume is little, good installation.

After the invention process, promoted the security performance of anti-theft safety door, outstanding advantage is as follows:

1, Computer key dish no longer produces card key, blunt situation, makes user use more comfortablely.

2, keyboard volume diminishes, and particularly becomes very thin, because button does not need the program of upwards involution, therefore can save the distance of the downward motion of button.

3, make also high-technicalization of keyboard, be equivalent to the handset touch panel that people use, fashion is generous.

4, the life-span of keyboard can improve, because there is no original product button needed " spring " in computer dish.

5, good production, because required electronic component, without particular/special requirement.Particularly each unit is made integrated rear just simpler.

6, circuit is reliable, and transistor amplifier circuit can, by faint touch signal, amplify and be converted into available electric signal, does not worry that touch signal is difficult for the situation of taking out, and touch sensitivity increases.

Brief description of the drawings

Fig. 1 is transistor amplifier circuit figure.

In figure: 01, the extension line of a button in touch-key dish; 02, preposition amplifying triode; 03, NPN triode; 04, the collector resistance of NPN triode; 05, PNP triode; 07, electronic relay; 08, two of electronic relay normally opened contact terminations.

Fig. 2 is button and shaping amplification circuit and keypad overall plan block scheme.

In figure: 201 a, button in keypad; 01, the extension line of a button in touch-key dish; 203, transistor amplifier circuit; 204, the operation circuit in touch-key dish.

Fig. 3 is overall frame assumption diagram.

In figure: 204, the operation circuit in keypad; 300, connect the button of the transistor amplifier circuit of making integrated form; 301, the button of the transistor amplifier circuit of integrated form is made in other connections; 302, touch-key dish mechanical keyboard skeleton.

Embodiment

Fig. 1 to Fig. 3 has described specific embodiment of the invention example.

One, option:

Preposition amplifying triode is selected large power triode, and electronic relay adopts 4066, and resistance is without particular/special requirement.

One, welding:

(1), the simulation of separation member welding.

1, weld transistor amplifier circuit according to Fig. 1.

2, the contact chip of keypad after connecting, wire is connected on transistor amplifier circuit.

3, the two ends lead-in wire of electronic relay normally opened contact is connected on the operation circuit in keypad.

(2) transistor amplifier circuit is made the facture of integrated circuit.

Corresponding each button transistor amplifier circuit is made to integrated circuit, is that each button has three extension lines, a push button signalling inlead, two normally opened contact extension lines.

2, normally opened contact extension line is connected on the operation circuit in keypad on two of each button.

Two, debugging.

Adjusting the sensitivity of each unit button, is adjustment 05, first sensitivity adjustment resistance and 07, second sensitivity adjustment resistance; Make it to become such situation: in the time that finger is close near key, corresponding keys produces action.In the time that finger is loosening or leaves, keyswitch is off-state.

Three, install:

Button is put into touch-key dish mechanical keyboard skeleton with together with operation circuit in transistor amplifier circuit, keypad after integrated.

Claims (3)

1. the tactile keyboard that transistor-type amplifies, is characterized in that: by touch-key dish skeleton, and tactile keyboard button, transistor amplifier circuit, the operation circuit in keypad forms jointly:

Wherein: transistor amplifier circuit is made up of preamplifier state, power-amplifier stage, electronic relay: the collector resistance of NPN triode, PNP triode, NPN triode has formed power-amplifier stage;

Preamplifier state is a triode, preposition amplifying triode by name, the input that tactile keyboard button extension line connects preamplifier state is the base stage of preposition amplifying triode, collector connects power supply, the emitter of preposition amplifying triode is that the input of the output connection power-amplifier stage of preamplifier state is the base stage of NPN triode, the grounded emitter of NPN triode, the collector resistance of NPN triode is connected with the base stage of PNP triode, the emitter of PNP triode connects power supply, the control line bud of the collector connecting electronic relay of PNP triode, often the opening two contacts and become the output of transistor amplifier circuit of electronic relay, connect the operation circuit in keypad,

Each button on tactile keyboard is connected with a transistor amplifier circuit;

All circuit use integrated technique, make integrated circuit, then put in touch-key dish skeleton.

2. the tactile keyboard that transistor-type according to claim 1 amplifies, is characterized in that: electronic relay is COMS integrated circuit.

3. the tactile keyboard that transistor-type according to claim 1 amplifies, is characterized in that: the withstand voltage of preposition amplifying triode should be greater than 70V.