CN206226405U - A kind of direct capacitance switch key and the triggering adjustable direct capacitance keyboard of stroke - Google Patents

Abstract

The utility model is related to terminal device input unit technical field, especially a kind of direct capacitance switch key and the triggering adjustable direct capacitance keyboard of stroke.Wherein, button includes pcb board, presses component and stage clip, the upper surface of pcb board is equipped with two metal sensing chips being distributed side by side, and the top of stage clip is connected to and presses the lower surface of component, bottom and be connected on the upper surface of pcb board, and metal sensing chip is located in the range of the circumference profile of stage clip.The utility model forms an equivalent capacity for variable capacity after two metal sensing chips are combined with stage clip, using two magnitudes of voltage of metal sensing chip for detecting as the basis of signals for pushing or upspringing for judging button；Because button does not exist physical contact, can be prevented effectively from and the short problem of service life occur because physical contact is easily aoxidized；Meanwhile, the stroke of triggering depends on the specific setting to the magnitude of voltage of metal sensing chip, and the adjustability and controllability for triggering stroke are very strong, are conducive to meeting consumer to button and the diversified demand of keyboard feel.

Description

A kind of direct capacitance switch key and the triggering adjustable direct capacitance keyboard of stroke

Technical field

The utility model is related to terminal device input unit technical field, especially a kind of direct capacitance switch key and its institute The adjustable direct capacitance keyboard of triggering stroke of composition.

Background technology

At present, the keyboard in market mainly has thin film type keyboard and mechanical keyboard two types.Wherein, mechanical keyboard Each button uses independent mechanical switch, switch internal to use the principle of metalloid touch switch, built-in metal Spring and shell fragment carry out control button up and down motion makes contacting or disconnection, then metal haptic element and rigid wiring board by switching The technique of welding, realizes that signal is transmitted by wiring board and is connected with master control borad, because complex structure, cost are high, by The thin film type keyboard that step is occurred in recent years replaces；But due to mechanical keyboard manufacture is accurate, key stroke is big, sedate thickness Weight, in the life-span for having splendid feel and overlength, disappears but exists always as the high-end product of keyboard.Diaphragm type Keyboard is then to push pusher structure using keycap, and push rod lower section sets one similar to the bowl-shape silicone elastomer body of left-hand thread, in it Salient point is provided with the middle of portion, by the elastic deformation of colloidal silica, makes the film circuit board below the salient point compressing of silica gel inside, with silicon Contact conducting and transmission signal are realized in the presence of glue elastomer, is largely produced due to cheap, but it there is also Obvious shortcoming, such as slide guide stroke are short, button stability is poor, are susceptible to rock, it is impossible to obtain consistent feel etc..

Although two kinds of keyboard respectively has advantage and disadvantage, either mechanical keyboard or thin film type keyboard, its switch Principle judge carrying out the switch of button according to the conducting of physical contact and is disconnected；Because keyboard of the prior art is touched Point is typically all to use silver paste contact or gold contact, the heavy metal material such as gold and silver (or in atmosphere) after air is run into Easily there is oxidation reaction, so that two kinds of keyboard cannot be greatly improved on service life；Together When, the position of the switch contact of two kinds of keyboard uses fixed form so that cannot meet consumer to by The diversified demand of key feel；In addition, with the rise of sports of playing in recent years, consumer is to the overall performance of keyboard and makes Requirement higher is proposed with life-span etc..

Utility model content

For the deficiency that above-mentioned prior art is present, one of purpose of the present utility model is to provide a kind of direct capacitance Switch key；Another purpose of the present utility model is to provide a kind of triggering row being made up of above-mentioned direct capacitance switch key The adjustable direct capacitance keyboard of journey.

To achieve these goals, one of technical scheme that the utility model is used for：

A kind of direct capacitance switch key, it include pcb board, be concurrently arranged at pcb board top press component and It is held on pcb board and presses the stage clip between component, the upper surface of the pcb board is equipped with two metal sensings being distributed side by side Piece, the top of the stage clip is connected to and presses the lower surface of component, bottom and be connected on the upper surface of pcb board, and the metal Sensing chip is located in the range of the circumference profile of stage clip.

Preferably, the material of the metal sensing chip is copper, and each described metal sensing chip includes that one is semicircular Induction part and along induction part diametric(al) towards one end extend after formed lead portion, two metal sensing chips are in pcb board On in mirror image be distributed, the induction part be located at stage clip circumference profile in the range of.

Preferably, the stage clip is coniform or round table-like structure, the bottom of the stage clip and the upper surface phase of pcb board Connect, and the induction part is located in the range of the circumference profile of the bottom surface of stage clip.

Preferably, the component that presses includes silica gel sheath, key axle, key set and keycap, and the silica gel sheath is included with pcb board simultaneously The plate portion that presses of row distribution is in the bottom that key covers with the connecting pole portion of the upper surface for pressing plate portion, the plate portion that presses is formed at Intraoral, the key axle is fixed in connecting pole portion and is passed by the top ports that key covers, the keycap be located at the top of key set and with Key axle sleeve is connected in one；The top of the stage clip is connected on the lower surface for pressing plate portion.

Another technical scheme that the utility model is used for：

One kind triggering the adjustable direct capacitance keyboard of stroke, if it include governor circuit, drive circuit, detection circuit and by Dry key arrangement and the key-press matrix being electrically connected with each other, the button is a kind of above-mentioned direct capacitance switch key, And two metal sensing chips of the button are respectively defined as the first sensing chip and the second sensing chip, several described key-press sharings One piece of pcb board or some pieces of pcb boards, the governor circuit, drive circuit and detection circuit are integrated on pcb board；

First sensing chip of each button is connected by drive circuit with governor circuit, the second sensing chip passes through Detection circuit is connected with governor circuit, and the governor circuit regulates and controls the magnitude of voltage of the first sensing chip and by inspection by drive circuit Slowdown monitoring circuit reads the magnitude of voltage of the second corresponding sensing chip of the first sensing chip.

Preferably, in the key-press matrix, the first sensing chip of several buttons in same row is by same Piece drives line is connected with drive circuit, the second sensing chip of several buttons in same a line is by same inspection Survey line is connected with detection circuit, and a diode is respectively connected between each described second sensing chip and corresponding detection line.

Preferably, the governor circuit is integrated with A/D converting units, signaling control unit and button mapping treatment including one The microprocessor of unit, the detection circuit include a multiplex electronics and several by first resistor and second resistance structure Into current-to-voltage converting circuit, the every detection line is to that should have a current-to-voltage converting circuit, and the every inspection Survey line is all connected between corresponding first resistor and second resistance；The magnitude of voltage of the second sensing chip of each button leads to The A/D converting units that multiplex electronics are delivered to microprocessor are crossed, the microcontroller will by button map processing unit The key value that button running parameter is converted to standard externally sends.

Preferably, the microcontroller is also associated with a parameter storage circuit for being used to store the parameter of button.

As a result of such scheme, switch key in the utility model and the keyboard being made up of button can pass through Two metal sensing chips form an equivalent capacity for variable capacity after being combined with stage clip, using the voltage of the sensing chip for detecting Value is used as the basis of signals for pushing or upspringing for judging button；Because button does not exist physical contact, can be prevented effectively from because of physics Contact easily aoxidizes and the short problem of service life occurs；Meanwhile, the stroke of triggering depends on the magnitude of voltage to metal sensing chip Specific setting, the adjustability and controllability for triggering stroke be very strong, is conducive to meeting consumer many to button and keyboard feel The demand of sample；Its simple structure, stroke is big and controllability strong for triggering, without physical contact, compensate for key at present on the market The inherent technology defect of disk, with very strong actual application value and market popularization value.

Brief description of the drawings

Fig. 1 is the structural decomposition diagram of the direct capacitance switch key of the utility model embodiment；

Fig. 2 is the control principle drawing () of the direct capacitance keyboard of the utility model embodiment；

Fig. 3 is the current trend schematic diagram of the direct capacitance switch key of the utility model embodiment；

Fig. 4 is that the voltage of second sensing chip of the direct capacitance switch key of the utility model embodiment in trigger process becomes Change figure；

Fig. 5 is the control principle drawing (two) of the direct capacitance keyboard of the utility model embodiment.

Specific embodiment

Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by right It is required that the multitude of different ways for limiting and covering is implemented.

A kind of direct capacitance switch key for providing as shown in Figure 1 and with reference to Fig. 2 to Fig. 5, the utility model embodiment, it is wrapped Include pcb board 1, be concurrently arranged at pressing component and being held on pcb board 1 and press the pressure between component for the top of pcb board 1 Spring 2, two metal sensing chip s being distributed side by side are equipped with the upper surface of pcb board 1, and the top of stage clip 2 is connected to and presses component Lower surface, bottom be connected on the upper surface of pcb board 1, and metal sensing chip s be located at stage clip 2 circumference profile in the range of.By This, an equivalent capacity for variable capacity is formed after being combined with stage clip 2 using two metal sensing chip s, in practical application, After two metal sensing chip s are electrically connected respectively, when push press component when, stage clip 2 be in compressive state, equivalent capacity Capacitance can change so that can judge to press by detecting the voltage of metal sensing chip s component whether push or Whether in place to push, with this, to judge pushing or upspringing there is provided basis of signals for button；Because whole switch key does not exist The physical contact that button is used in conventional keyboard, therefore conventional keyboard can be prevented effectively from and occur making because physical contact is easily aoxidized With the problem of short life, meanwhile, the stroke of triggering depends on the specific setting to the magnitude of voltage of metal sensing chip s, triggers stroke Adjustability and controllability it is very strong, be conducive to meeting consumer to the diversified demand of handfeel of keys.

Be the structure of the whole button of optimization, especially ensure metal sensing chip s with combined by stage clip 2 with variable The overall performance of the equivalent capacity of capacity, while taking into account metal sensing chip s oxidation resistances in itself, the metal sense of the present embodiment Answer the material preferably copper (as a preferred scheme, insulated paint can be covered on the surface of copper) of piece s, and each metal sensing chip S includes the lead portion 4 that a semicircular induction part 3 and the diametric(al) along induction part 3 are formed after extending towards one end, two gold Category sensing chip s is distributed on pcb board 1 in mirror image, and induction part 3 is then in the range of the circumference profile of stage clip 2.Thus using two Individual radial distribution and intermediate medium form main induction area (constituting the basic structure of electric capacity) for the induction part 3 of air, in stage clip 2 During compression, there is certain change (such as Volume Changes) in intermediate medium, so as to realize the volume change of whole equivalent capacity.

Further to optimize the performance of equivalent capacity, while ensureing to press the stationarity of component action, the pressure of the present embodiment The preferred coniform or round table-like structure of spring 2, the bottom of stage clip 2 is connected with the upper surface of pcb board 1, and induction part 3 is located at stage clip In the range of the circumference profile of 2 bottom surface.

Used as a preferred scheme, the component that presses of the present embodiment covers 7 and keycap 8 including silica gel sheath 5, key axle 6, key, its In, silica gel sheath 5 includes pressing plate portion 51 and being formed at the connecting pole of the upper surface for pressing plate portion 51 with the parallel distributed of pcb board 1 Portion 52, presses plate portion 51 and is in the bottom nozzle of key set 7, and the top ports that key axle 6 is fixed in connecting pole portion 52 and by key set 7 are worn Go out, keycap 8 is then located at the top of key set 7 and is integrated with the socket of key axle 6；The top of stage clip 2 is connected to and presses under plate portion 51 On surface.Thus, carry out directly contact by pressing plate portion 51 and stage clip 2, with avoided using its material property silica gel sheath 5 because Cause to press the damage of component with the hard contact of stage clip 2 for a long time.

Based on the structure of above-mentioned switch key, as shown in Figures 2 to 5 and Fig. 1 is combined, the utility model embodiment is also carried Supplied it is a kind of triggering the adjustable direct capacitance keyboard of stroke, if it include governor circuit a, drive circuit b, detection circuit c and by Dry key arrangement and the key-press matrix d being electrically connected with each other, button is a kind of above-mentioned direct capacitance switch key, and is It is easy to two metal sensing chip s of the description of follow-up technical scheme, button to be respectively defined as the senses of the first sensing chip s1 and second Piece s2 is answered, several buttons can as the case may be share one piece of pcb board 1 or some pieces of pcb boards 2, governor circuit a, driving Circuit b and detection circuit c are integrated on pcb board 1；First sensing chip s1 of each button passes through drive circuit b and master control Circuit a is connected, the second sensing chip s2 is connected by detecting circuit c with governor circuit a, and governor circuit a is adjusted by drive circuit b Control the magnitude of voltage of the first sensing chip s1 and by detecting that circuit c reads the electricity of the second corresponding sensing chip s2 of the first sensing chip s1 Pressure value.In this way, there is the performance of the equivalent capacity of variable capacity in itself due to button, after button is pressed or upsprings, the Capacitance between one sensing chip s1 and the second sensing chip s2 can change, and (after such as button is pressed, equivalent capacity becomes big, bullet Then equivalent capacity diminishes when rising), using the magnitude of voltage for detecting the second sensing chip s2 of circuit c detections, governor circuit a is capable of achieving to this The reading of magnitude of voltage, can determine whether whether button is pressed or bullet with by the way that default magnitude of voltage and this magnitude of voltage is contrasted Rise；Meanwhile, (such as it is pressed in button by the voltage for controlling drive circuit b to regulate and control the first sensing chip s1 using governor circuit a During, the voltage of the first sensing chip s1 is changed from high to low, now the current direction of button is as shown in figure 3, the second sense The voltage (i.e. P points voltage) of piece s2 is answered to be pulled low, the change of P point voltages refers to Fig. 4) so that by the regulation and control of governor circuit a And coordinate equivalent capacity change to be in itself capable of achieving the regulation and control to triggering stroke, i.e.,：The triggering stroke of button reach it is maximum or Upspring completely constantly, the changing value of equivalent capacity is fixed (i.e. direct capacitance has maximum and minimum), thus by Multiple trigger points are set between maximum electrostatic capacity and minimum static capacity, it is possible to realize the regulation control to triggering stroke, To meet consumer to the diversified demand of handfeel of keys, the setting function of DIY is realized.Certainly, each circuit of the present embodiment Circuit structure commonly used in the prior art can be as the case may be used, it only needs to possess above-mentioned driving and detection, reading The function such as take.

To avoid occurring interfering between each button in key-press matrix, as shown in figure 5, in key-press matrix, being located at First sensing chip s1 of several buttons in same row is connected with drive circuit b by same drives line e and is located at same Second sensing chip s2 of several buttons on row is then connected by same detection line f with detection circuit c, each second sensing A diode D is respectively connected between piece s2 and corresponding detection line f.The effect for setting diode D is：When in key-press matrix When two on same detection line f and more than two buttons are concurrently depressed, corresponding diode D can play unidirectional energization Effect, to prevent from occurring interfering between button.Certainly, the key-press matrix of the present embodiment can be carried out according to the bond number of keyboard Extension (as shown in Figure 5).

Be the performance of the whole keyboard of optimization, the governor circuit a of this implementations including microprocessor a1 and respectively with microprocessor Device a1 connected A/D converting units a2, signaling control unit a3 and button map processing unit a4, detection circuit c then uses mesh The multiplex electronics of preceding main flow on the market, the magnitude of voltage of the second sensing chip s2 that detection circuit c will be detected is changed by A/D Unit a2 is conveyed to microcontroller a1 after being changed, microcontroller a1 is issued by signaling control unit a3 to drive circuit b Regulation and control instruction, meanwhile, microcontroller a1 is externally sent (as sent extremely button running parameter by button map processing unit a4 PC terminals).

To optimize the performance of whole button, the governor circuit a of the present embodiment is integrated with A/D converting units a1, letter including one The microprocessor of number control unit a2 and button map processing unit a3, detection circuit c include a multiplex electronics c1 and Several current-to-voltage converting circuits being made up of first resistor R1 and second resistance R2, every detection line f is to that should have one Current-to-voltage converting circuit, and every detection line f is all connected between corresponding first resistor R1 and second resistance R2；Each is pressed The magnitude of voltage of the second sensing chip s2 of key is multiple by multichannel again by (such as partial pressure) after the treatment of current-to-voltage converting circuit The A/D converting unit a1 of microprocessor are delivered to circuit c1, microcontroller is become button by button map processing unit a3 Change Parameter Switch for the key value of standard externally sends (as sent to PC terminals), and microcontroller can be by signaling control unit A2 issues regulating and controlling voltage and instructs to drive circuit b.

In addition, microcontroller a1 is also associated with a parameter storage circuit g for being used to store the parameter of button.

Preferred embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, Equivalent structure or equivalent flow conversion that every utilization the utility model specification and accompanying drawing content are made, or directly or indirectly fortune Used in other related technical fields, similarly it is included in scope of patent protection of the present utility model.

Claims (8)

1. a kind of direct capacitance switch key, it is characterised in that：The top that it includes pcb board, be concurrently arranged at pcb board presses Component and it is held on pcb board and presses the stage clip between component, the upper surface of the pcb board is equipped with two and is distributed side by side Metal sensing chip, the top of the stage clip is connected to and presses the lower surface of component, bottom and be connected on the upper surface of pcb board, and The metal sensing chip is located in the range of the circumference profile of stage clip.

2. a kind of direct capacitance switch key as claimed in claim 1, it is characterised in that：The material of the metal sensing chip is Copper, and each described metal sensing chip include a semicircular induction part and along induction part diametric(al) towards one end extend after The lead portion of formation, two metal sensing chips are distributed on pcb board in mirror image, and the induction part is located at the circumference wheel of stage clip In wide scope.

3. a kind of direct capacitance switch key as claimed in claim 2, it is characterised in that：The stage clip is coniform or round table-like Structure, the bottom of the stage clip is connected with the upper surface of pcb board, and the induction part is located at the circumference profile of the bottom surface of stage clip In the range of.

4. a kind of direct capacitance switch key as claimed in claim 3, it is characterised in that：It is described press component including silica gel sheath, Key axle, key set and keycap, the silica gel sheath include pressing plate portion and being formed at the upper table for pressing plate portion with pcb board parallel distributed The connecting pole portion in face, the plate portion that presses is in the bottom nozzle of key set, and the key axle is fixed in connecting pole portion and by key set Top ports pass, the keycap be located at key set top simultaneously with key axle sleeve be connected in one；The top of the stage clip is connected to tactile On the lower surface in pressing plate portion.

It is 5. a kind of to trigger the adjustable direct capacitance keyboard of stroke, it is characterised in that：It includes governor circuit, drive circuit, detection electricity Road and by several key arrangements and the key-press matrix that is electrically connected with each other, the button is to appoint in claim 1-3 A kind of direct capacitance switch key described in one, and the button two metal sensing chips be respectively defined as the first sensing chip and Second sensing chip, one piece of pcb board of several described key-press sharings or some pieces of pcb boards, the governor circuit, drive circuit and Detection circuit is integrated on pcb board；

First sensing chip of each button is connected by drive circuit with governor circuit, the second sensing chip is by detection Circuit is connected with governor circuit, and the governor circuit regulates and controls the magnitude of voltage of the first sensing chip and by detecting electricity by drive circuit Read the magnitude of voltage of the second corresponding sensing chip of the first sensing chip in road.

6. one kind as claimed in claim 5 triggers the adjustable direct capacitance keyboard of stroke, it is characterised in that：The key-press matrix In, the first sensing chip of several buttons in same row is connected by same drives line with drive circuit, position It is connected with detection circuit by same detection line in the second sensing chip of several buttons in same a line, described in each A diode is respectively connected between second sensing chip and corresponding detection line.

7. one kind as claimed in claim 6 triggers the adjustable direct capacitance keyboard of stroke, it is characterised in that：The governor circuit bag Include a microprocessor for being integrated with A/D converting units, signaling control unit and button map processing unit, the detection circuit bag A multiplex electronics and several current-to-voltage converting circuits being made up of first resistor and second resistance are included, described in every Detection line is to that should have a current-to-voltage converting circuit, and every detection line is all connected to corresponding first resistor and the Between two resistance；The magnitude of voltage of the second sensing chip of each button is delivered to microprocessor by multiplex electronics Button running parameter is converted to A/D converting units, the microcontroller key value of standard by button map processing unit Externally send.

8. one kind as claimed in claim 7 triggers the adjustable direct capacitance keyboard of stroke, it is characterised in that：The microcontroller is also It is connected with a parameter storage circuit for being used to store the parameter of button.