CN201594228U

CN201594228U - Keyboard

Info

Publication number: CN201594228U
Application number: CN200920215617XU
Authority: CN
Inventors: 徐美娟; 尚妙吉; 孙水芳; 金晶; 雷婷; 吴昊
Original assignee: Ningbo Institute of Technology of ZJU
Current assignee: Ningbo Institute of Technology of ZJU
Priority date: 2009-12-31
Filing date: 2009-12-31
Publication date: 2010-09-29
Anticipated expiration: 2019-12-31

Abstract

The utility model discloses a keyboard capable of generating power. Two sides of each row of pressing keys along the length direction of a frame are respectively distributed with an electret which is treated by insulation; an elastomer is arranged between key caps of the pressing keys and the electrets; the internal top part of the key cap is fixedly provided with a plurality of first metal sheets which are parallel mutually; a protrusion, an elastic insulating plate and a plurality of second metal sheets which are mutually parallel are sequentially arranged from bottom to top between the plurality of first metal sheets and a circuit board, and the bottom surface of the protrusion is provided with a conducting layer; the second metal sheets, the first metal sheets and the electrets are mutually parallel; the difference value between the length of the first metal sheet along the moving direction of the key cap and the length of the second metal sheet along the moving direction of the key cap is equal to or larger than the distance between the bottom surface of the protrusion and the circuit board; and the first metal sheets are mutually and electrically connected and then an electric wire is led out to be electrically connected with one electrode of an external processing circuit, and the second metal sheets are mutually and electrically connected and then another electric wire is led out to be electrically connected with the other electrode of the external processing circuit.

Description

Keyboard

Technical field

The utility model relates to switching value signal input device technical field, specifically is a kind of keyboard.

Background technology

The keyboard that uses is a kind of simple switching value signal input device at present, the cipher inputting keyboard that uses such as computer keyboard, financial sector etc., their basic structure comprises framework, wiring board, presses key, wiring board is connected with frame fixation, pressing key and framework flexibly connects, press key and make the particular electrical circuit closure on the wiring board import respective symbols by pressing down, the keyboard of said structure is all less than the ability of generating.

The utility model content

The technical problems to be solved in the utility model is that a kind of keyboard that can generate electricity is provided.

The technical solution of the utility model is, the utility model keyboard, it comprises framework, wiring board, presses key, and wiring board is connected with frame fixation, the electret of handling through insulation that distributes along the both sides that every row of the length direction of framework presses key, this electret is connected with frame fixation; Between the described keycap of pressing key and electret one elastic body is set, this elastomeric end is fixedlyed connected with electret, and the elastomeric other end is fixedlyed connected with keycap; The inner top of described keycap is fixed with first sheet metal that handle through insulation on a plurality of surfaces that are parallel to each other, between first sheet metal and wiring board, be sequentially provided with projection from bottom to top, elastic insulated plate, second sheet metal that handle through insulation on a plurality of surfaces that are parallel to each other, the bottom surface of projection is provided with conductive layer, elastic insulated plate is fixedlyed connected with electret, described projection is fixedlyed connected with the bottom of elastic insulated plate, there is spacing between the bottom surface of projection and wiring board, second sheet metal is fixedlyed connected with the top of elastic insulated plate, described second sheet metal is also parallel with first sheet metal, and interlaced distribution between second sheet metal and first sheet metal, described first sheet metal is also parallel with electret with second sheet metal; The length along keycap direction of motion of described first sheet metal is longer than the length along keycap direction of motion of second sheet metal, and both differences are equal to or greater than the spacing that exists between the bottom surface of described projection and wiring board; Draw an electric wire after described first sheet metal is electrically connected each other and be electrically connected, draw an electric wire after described second sheet metal is electrically connected each other and be electrically connected with another utmost point of outer treatment circuit with a utmost point of outer treatment circuit.

After adopting said structure, the utility model compared with prior art has the following advantages: because distribute an electret of handling through insulation along the both sides that every row of the length direction of framework presses key, this electret is connected with frame fixation; Between the described keycap of pressing key and electret one elastic body is set, this elastomeric end is fixedlyed connected with electret, and the elastomeric other end is fixedlyed connected with keycap; The inner top of described keycap is fixed with first sheet metal that handle through insulation on a plurality of surfaces that are parallel to each other, between first sheet metal and wiring board, be sequentially provided with projection from bottom to top, elastic insulated plate, second sheet metal that handle through insulation on a plurality of surfaces that are parallel to each other, the bottom surface of projection is provided with conductive layer, elastic insulated plate is fixedlyed connected with electret, described projection is fixedlyed connected with the bottom of elastic insulated plate, there is spacing between the bottom surface of projection and wiring board, second sheet metal is fixedlyed connected with the top of elastic insulated plate, described second sheet metal is also parallel with first sheet metal, and interlaced distribution between second sheet metal and first sheet metal, described first sheet metal is also parallel with electret with second sheet metal; The length along keycap direction of motion of described first sheet metal is longer than the length along keycap direction of motion of second sheet metal, and both differences are equal to or greater than the spacing that exists between the bottom surface of described projection and wiring board; Drawing an electric wire after described first sheet metal is electrically connected each other is electrically connected with a utmost point of outer treatment circuit, drawing an electric wire after described second sheet metal is electrically connected each other is electrically connected with another utmost point of outer treatment circuit, like this, just each is pressed key and become the variable capacitance generator, so-called variable capacitance generator is meant, described first sheet metal moves up and down keycap by the finger tapping keycap and by elastomeric reset capability in the uniform electric field that electret makes up, because first sheet metal and second sheet metal are parallel to each other and are interspersed, so adjacent first sheet metal and second sheet metal have formed variable capacitance one by one, discharging and recharging and lead to outer treatment circuit by variable capacitance by electric wire, again because the length along keycap direction of motion of described first sheet metal is longer than the length along keycap direction of motion of second sheet metal, and both differences are equal to or greater than the spacing that exists between the bottom surface of described projection and wiring board, the bottom surface of projection is provided with conductive layer, so when knocking keycap, the bottom surface of first sheet metal will push elastic insulated plate and move downward, the moving projection of elastic insulated strip moves downward and makes the conductive layer applying wiring board on the protruding bottom surface, make the particular electrical circuit closure on the wiring board, thereby finish the input of respective symbols, like this, in generating, finish the function of keyboard input character.Comprehensively above-mentioned, the utility model keyboard has the advantage that can generate electricity, and, the keyboard number of times is on average knocked for each person every day up to 150 in the data presentation whole world about CFS according to News Network of qianlong.com announcement message, more than 000, in case use the utility model keyboard on a large scale, rely on so and knock the electric energy that keyboard produces and just can be stored and utilize, this is very significant for country about the fundamental policy of energy-saving and emission-reduction.

As improvement, described outer treatment circuit comprises full-bridge rectification unit, integrated amplifying unit and accumulator, two input ends of described full-bridge rectification unit are respectively the two poles of the earth of outer treatment circuit, be electrically connected with the input end of integrated amplifying unit and a utmost point of accumulator respectively behind two output terminals of full-bridge rectification unit electric capacity in parallel, the output terminal of integrated amplifying unit is electrically connected with another utmost point of accumulator, described outer treatment circuit is simple in structure, charge efficiency is high, more helps the raising of the utility model performance.

Description of drawings

Fig. 1 is the partial structurtes synoptic diagram of the utility model keyboard.

Fig. 2 is an amplification view of pressing key of the utility model keyboard.

Fig. 3 is the circuit theory diagrams of the outer treatment circuit of the utility model keyboard.

Shown in the figure: 1, framework, 2, wiring board, 3, electret, 4, keycap, 5, elastic body, 6, first sheet metal, 7, projection, 8, elastic insulated plate, 9, second sheet metal, 10, the full-bridge rectification unit, 11, integrated amplifying unit.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

The utility model keyboard, it comprises framework 1, wiring board 2, presses key, and wiring board 2 is fixedlyed connected with framework 1, the electret 3 of handling through insulation that distributes along the both sides that every row of the length direction of framework 1 presses key, this electret 3 is fixedlyed connected with framework 1; Described

keycap

4 and 3 of the electrets of pressing key is provided with an elastic body 5, and an end of this elastic body 5 is fixedlyed connected with electret 3, and the other end of elastic body 5 is fixedlyed connected with keycap 4; The inner top of described keycap 4 is fixed with first sheet metal 6 that handle through insulation on a plurality of surfaces that are parallel to each other, be sequentially provided with projection 7 from bottom to top at

first sheet metal

6 and 2 of wiring boards, elastic insulated plate 8, second sheet metal 9 that handle through insulation on a plurality of surfaces that are parallel to each other, the bottom surface of projection 7 is provided with conductive layer, elastic insulated plate 8 is fixedlyed connected with electret 3, described protruding 7 fixedly connected with the bottom of elastic insulated plate 8, there are spacing in the bottom surface and 2 of the wiring boards of projection 7, second sheet metal 9 is fixedlyed connected with the top of elastic insulated plate 8, described second sheet metal 9 is also parallel with first sheet metal 6, and interlaced distribution between second sheet metal 9 and first sheet metal 6, described first sheet metal 6 is also parallel with electret 3 with second sheet metal 9; The length along keycap direction of motion of described first sheet metal 6 is longer than the length along keycap direction of motion of second sheet metal 9, and both differences are equal to or greater than the spacing of described protruding 7 bottom surface and 2 existence of wiring board; Described first sheet metal 6 is electrically connected each other draws an electric wire after (by lead series connection) and is electrically connected with a utmost point of outer treatment circuit, and described second sheet metal 9 is electrically connected each other draws an electric wire after (connecting by lead) and be electrically connected with another utmost point of outer treatment circuit.Concrete mechanism is shown in Fig. 1 or 2, because of conductive layer is very thin, so do not draw in the drawings.

In this example, described elastic body 5 is a cyano group rubber, and an end of this cyano group rubber and the top of electret 3 are bonding, and the bottom of the other end of cyano group rubber and keycap 4 is bonding.Described first sheet metal 6 and second sheet metal 9 are bag lacquer sheet metal commonly used.

Described outer treatment circuit comprises full-bridge rectification unit 10, integrated amplifying unit 11 and accumulator, two input ends of described full-bridge rectification unit 10 are respectively the two poles of the earth of outer treatment circuit, be electrically connected with the input end of integrated amplifying unit 11 and a utmost point of accumulator respectively behind two output terminals of full-bridge rectification unit 10 electric capacity in parallel, the output terminal of integrated amplifying unit 11 is electrically connected with another utmost point of accumulator.Concrete structure as shown in Figure 3.

In this example, the utility model keyboard is a computer keyboard, described electret 3 is seven, press in the cut-open view of key shown in Figure 2 one, first sheet metal 6 is 17, second sheet metal 9 is 16, do not pressed following time at keycap 4, the end face of the bottom surface of first sheet metal 6 and second sheet metal 9 maintains an equal level mutually, the center of second sheet metal 9 part between adjacent first sheet metal 6, because of interlaced distribution between second sheet metal 9 and first sheet metal 6, so first sheet metal 6 is the center of part between adjacent second sheet metal 9 also, the length along keycap direction of motion (being vertical direction shown in Figure 2) of described first sheet metal 6 is longer than the length along keycap direction of motion of second sheet metal 9, and both differences are greater than the spacing of described protruding 7 bottom surface and 2 existence of wiring board, parallel as much as possible in order to guarantee first sheet metal 6 with second sheet metal 9, when first sheet metal 6 pushes second sheet metal 9, the distortion of elastic insulated plate 8 is as far as possible little, that is to say that the spacing of described protruding 7 bottom surface and 2 existence of wiring board is as far as possible little.

Described framework 1 and wiring board 2 can obtain by prior art, and described outer treatment circuit can be placed in the cavity of the free time on the keyboard, also can be external separately, and do not add and give unnecessary details.

Below only just preferred embodiment of the present invention be described, but can not be interpreted as it is restriction to claim.Structure of the present invention can have other variations, is not limited to said structure, such as: the sheet metal that described electret 3 can adopt the surface to handle through insulation replaces, and this sheet metal is inner to connect extraneous power supply, thereby makes sheet metal that uniform electric field can be provided; Do not pressed following time at keycap 4, it is original state, the part of first sheet metal 6 can be in the part between adjacent second sheet metal 9, accordingly, the part of second sheet metal 9 also will be in the part between adjacent first sheet metal 6, that is to say, do not pressed following time that the end face of the bottom surface of first sheet metal 6 and second sheet metal 9 can not maintain an equal level mutually at keycap 4.In a word, all various variations of being done in the protection domain of the utility model independent claims are all in protection scope of the present invention.

Claims

1. keyboard, it comprises framework (1), wiring board (2), presses key, wiring board (2) is fixedlyed connected with framework (1), it is characterized in that, the electret (3) of handling through insulation that distributes along the both sides that every row of the length direction of framework (1) presses key, this electret (3) is fixedlyed connected with framework (1); Between the described keycap (4) of pressing key and electret (3) elastic body (5) is set, an end of this elastic body (5) is fixedlyed connected with electret (3), and the other end of elastic body (5) is fixedlyed connected with keycap (4); The inner top of described keycap (4) is fixed with first sheet metal (6) that handle through insulation on a plurality of surfaces that are parallel to each other, between first sheet metal (6) and wiring board (2), be sequentially provided with projection (7) from bottom to top, elastic insulated plate (8), second sheet metal (9) that handle through insulation on a plurality of surfaces that are parallel to each other, the bottom surface of projection (7) is provided with conductive layer, elastic insulated plate (8) is fixedlyed connected with electret (3), described projection (7) is fixedlyed connected with the bottom of elastic insulated plate (8), there is spacing between the bottom surface of projection (7) and wiring board (2), second sheet metal (9) is fixedlyed connected with the top of elastic insulated plate (8), described second sheet metal (9) is also parallel with first sheet metal (6), and interlaced distribution between second sheet metal (9) and first sheet metal (6), described first sheet metal (6) is also parallel with electret (3) with second sheet metal (9); The length along keycap direction of motion of described first sheet metal (6) will be grown than the length along keycap direction of motion of second sheet metal (9), and both differences are equal to or greater than the spacing that exists between the bottom surface of described projection (7) and wiring board (2); Draw an electric wire after described first sheet metal (6) is electrically connected each other and be electrically connected, draw an electric wire after described second sheet metal (9) is electrically connected each other and be electrically connected with another utmost point of outer treatment circuit with a utmost point of outer treatment circuit.

2. keyboard according to claim 1, it is characterized in that, described outer treatment circuit comprises full-bridge rectification unit (10), integrated amplifying unit (11) and accumulator, two input ends of described full-bridge rectification unit (10) are respectively the two poles of the earth of outer treatment circuit, be electrically connected with the input end of integrated amplifying unit (11) and a utmost point of accumulator respectively behind two output terminals of full-bridge rectification unit (10) electric capacity in parallel, the output terminal of integrated amplifying unit (11) is electrically connected with another utmost point of accumulator.