CN102386006A - Key panel and key system - Google Patents
Key panel and key system Download PDFInfo
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- CN102386006A CN102386006A CN2011102506599A CN201110250659A CN102386006A CN 102386006 A CN102386006 A CN 102386006A CN 2011102506599 A CN2011102506599 A CN 2011102506599A CN 201110250659 A CN201110250659 A CN 201110250659A CN 102386006 A CN102386006 A CN 102386006A
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Abstract
Provided are a key panel and a key system. The key panel comprises a first surface provided with a plurality of metal keys and a second surface opposite to the first surface, wherein a plurality of grooves respectively corresponding to the metal keys are arranged on the second surface. The key system comprises the key panel and a detection board combined with the key panel. The key panel is insulated from the detection board. The detection board comprises a plurality of electrodes respectively corresponding to the metal keys. The key panel and the key system are apt to deform at key positions, and the system can detect tiny deformation of the key positions.
Description
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of key panel and key system.
Background technology
Along with the continuous development of electronic technology, button is simple to operation owing to it, reaction is widely used in household electrical appliance or the consumer electronic product soon, thereby the chance that the user uses button to operate is also more and more.For example; The user can call or editing short message through the keyboard of portable terminal; Carry out the selection of television channel or volume through the button on the TV remote controller, carry out F.F., retreat or the selection of volume or the like through the button on the DVD remote controller.
It is poor that the finite sum in useful life of traditional mechanical formula button is controlled experience; And the obviously not attractive in appearance and difficult cleaning of its lofty outward appearance; Therefore, touch-key is applied on the various electronic products as a kind of replacement scheme of traditional mechanical formula button more and more; Not only can improve reliability, and help to realize sealing fully and being imbued with the design of modern sense.
The touch key-press panel generally is plastics; Under the covering of plastic front board; Touch just can be detected directly over the electrode of detecting plate, and using plastics to do panel material needs the metal ingredient in the strict control panel, otherwise causes the triggering of dislocation easily.Along with people's waits the raising that requires to appearance tactile impression with controlling to experience; Metal material begins to be used as the Appearance Panel of button product; If but key panel is metal material or containing metal composition then touches in any position of panel and all might trigger button that this just is difficult to distinguish each key position and also is difficult to confirm certain triggering once is to belong to which button.
Notification number is to disclose a kind of inductance induction type touch key-press in the Chinese utility model patent of CN201515361U, comprises panel and the circuit board that is distributed with induction coil, and panel is in the same place through screw or adhesive securement with circuit board.After pushing panel at key position, panel can produce the slight curves distortion, and the induction coil of panel on circuit board drawn close, and causes the magnetic flux between panel and the circuit board to change.
Yet; In order not cause that dislocation triggers; How to make metal key-press panel easily deformation take place so that system can detect the miniature deformation of key position at key position; Then be to adopt metal key-press panel realize to touch at present or light pressure button is failed the problem of fine solution always, in above-mentioned patent, also do not relate to this problem.
Summary of the invention
The problem that embodiment of the present invention solves provides a kind of key panel and key system, so that panel at key position deformation takes place easily, and system can detect the miniature deformation of key position.
For addressing the above problem, embodiment of the present invention provides a kind of key panel, comprising: be provided with the first surface of a plurality of metal key-press and with respect to the second surface of said first surface, said second surface has the groove of the corresponding said metal key-press of a plurality of difference.
Optional, said key panel comprises: first panel comprises said first surface and with respect to the 3rd surface of said first surface; Second panel comprises a plurality of through holes, said second surface and with respect to the 4th surface of said second surface, said a plurality of through holes are the metal key-press of corresponding said first surface respectively, fits with said the 3rd surface in said the 4th surface.
Optional, the material of said first panel is the flexible metal, the material of said second panel is a rigid material.
Optional, the material of said first panel is aluminium or copper, the material of said second panel is steel or pottery.
Optional, the thickness of said first panel is less than or equal to the thickness of said second panel.
Optional, the thickness of said first panel is 0.2～0.6mm, the thickness of said second panel is 0.6～0.8mm.
Optional, the metal key-press area part hollow out of said first panel.
For addressing the above problem, embodiment of the present invention also provides a kind of key system, comprising: above-mentioned key panel; The detecting plate that combines with said key panel insulate between said key panel and the detecting plate; Said detecting plate comprises the electrode of the corresponding said metal key-press of a plurality of difference.
Optional, said key panel has fixing current potential.
Optional, said electrode is an induction coil.
Optional, said key system also comprises: the testing circuit that links to each other with said electrode.
Optional, said testing circuit is 8 8-digit microcontrollers.
Compared with prior art, technique scheme has the following advantages:
The second surface of key panel has the groove corresponding to metal key-press; Just that metal key-press is regional panel attenuate; Make that the plate thickness of metal key-press position is thinner than plate thickness on every side, so deformation takes place with respect to panel on every side in the panel of metal key-press position more easily.
Key panel comprises first panel and second panel, and the metal key-press of first panel is corresponding with the through hole of second panel, because the metal key-press zone has space (being through hole), then panel at key position deformation takes place easily; And other zones beyond the metal key-press zone of first panel are because by second panel support, then panel is difficult for taking place deformation at non-key position.
First panel adopts the flexible metal; Touching or gently also be easy to generate deformation under the pressure, second panel adopts rigid material, is not easy deformation and has bigger support strength; And; The thickness of second panel makes panel more be prone to deformation takes place at key position greater than the thickness of first panel, then deformation can not take place at non-key position.
Metal key-press area part hollow out can be improved the metal flexible of key area, make metal decking deformation take place more easily at key position.
Key panel and detecting harden close after; Between the key panel of metal key-press position and detecting plate, has gap (being groove part); Touch key-press makes the panel generation miniature deformation of key position; And deformation can not take place in the panel that touches non-key position, therefore utilizes the metal deformation of key position and the electrode of detecting plate promptly can detect the button triggering.Owing to only just deformation can take place at key position, even miniature deformation also can be detected, therefore avoided false triggering, improved the antijamming capability that button detects.
Description of drawings
Fig. 1 is the structural representation of the key panel of embodiment of the present invention;
Fig. 2 is the generalized section of key panel shown in Figure 1 along the A-A line;
Fig. 3 is the perspective exploded view of the key system of the embodiment of the invention;
Fig. 4 is that the each several part of key system shown in Figure 3 combines the generalized section of back along the B-B line;
Fig. 5 is an embodiment sketch map in the metal key-press zone of key panel of the present invention;
Fig. 6 is another embodiment sketch map in the metal key-press zone of key panel of the present invention;
Fig. 7 is the sketch map of a button of key system shown in Figure 4 when being touched;
Fig. 8 is an embodiment sketch map of the electrode on the detecting plate of key system of the present invention.
Embodiment
The structure of the key panel of embodiment of the present invention is as depicted in figs. 1 and 2; Wherein, Fig. 2 is the generalized section of key panel shown in Figure 1 along the A-A line; Said key panel 1 comprises: be provided with the first surface 11 of a plurality of metal key-press 10a and with respect to the second surface 12 of said first surface 11, said second surface 12 has a plurality of groove 12a, said a plurality of groove 12a are the metal key-press 10a of corresponding said first surface 11 respectively.Because the zone at the metal key-press 10a of second surface 12 corresponding first surfaces 11 has groove 12a; Make that the plate thickness of metal key-press position is thinner than plate thickness on every side, so deformation takes place with respect to panel on every side in the panel of metal key-press position more easily.
The key system of embodiment of the present invention comprises: above-mentioned key panel, and the detecting plate that combines with said key panel insulate between said key panel and the detecting plate; Said detecting plate comprises a plurality of electrodes, and said a plurality of electrodes are corresponding said metal key-press respectively.Said key panel and detecting harden close after, in the metal key-press position, key panel and detecting have gap (groove part) between the plate, utilize the metal deformation of key position and the electrode of detecting plate can detect the button that is touched.
Below in conjunction with accompanying drawing and embodiment key system and key panel are elaborated.
Please refer to Fig. 3 and Fig. 4, wherein, Fig. 3 is the perspective exploded view of the key system of present embodiment, and Fig. 4 is that the each several part of key system shown in Figure 3 combines the generalized section of back along the B-B line.Said key system comprises: key panel 1, detecting plate 4, insulation board 3 between key panel 1 and detecting plate 4.
Can offer formation through machining with the groove on the first surface opposing second surface; Yet because the degree of depth of groove is wayward; For easy to process with enhance productivity, the key panel 1 of present embodiment is as shown in Figure 3, comprising: first panel 10 and second panel 20.
Second panel 20 comprises a plurality of through hole 20a, second surface 12 and with respect to the 4th surface 14 of second surface 12, a plurality of through hole 20a are the metal key-press 10a of corresponding first surface 11 respectively; For example; Illustrated metal key-press 10a has 5, and through hole 20a also has 5, and is corresponding one by one with metal key-press 10a.The shape of through hole 20a is basic identical with size and metal key-press zone, and in the present embodiment, through hole 20a is circular, and is corresponding one by one with the metal key-press zone.Because through hole is easy to process, therefore improved production efficiency, be suitable for producing in batches.
Fitting in the 4th surface 14 of the 3rd surface 13 and second panel 20 of first panel 10, makes first panel 10 and second panel 20 be combined together to form key panel, and the through hole 20a on second panel 20 is the groove on the key panel.
The hardness of second panel 20 is greater than the hardness of first panel 10, to first panel 10 stronger support force to be provided.In the present embodiment, the material of first panel 10 can be the flexible metal, for example is aluminium or copper, because flexible metallic material is softer and have ductility preferably, is therefore touching or gently also is being easy to generate deformation under the pressure.The material of second panel 20 can be rigid material; It for example is steel; Because rigid material is harder, therefore be not easy deformation and have bigger support strength, further make other zones in addition, metal key-press zone of the panel 10 of winning deformation can not take place; Thereby improved the antijamming capability that button detects, avoided false triggering.
Further, all right part hollow out in the metal key-press of first panel 10 zone, for example; Metal key-press zone punching at first panel; Form cellular metal key-press 10c as shown in Figure 6, perhaps, can also adopt the metal hollow word in the metal key-press zone as metal key-press.Metal key-press area part hollow out can be improved the metal flexible of key area, make the panel 10 of winning deformation take place more easily at key position.In addition; Owing to metal key-press area part hollow out, improved the flexibility of metal key-press to a certain extent, therefore first panel 10 can not need be done very thinly; And the metal key-press of hollow out zone can also printing opacity, can realize having the key system of backlight function.
Please continue with reference to figure 3 and Fig. 4, the detecting plate 4 of the key system of present embodiment comprises a plurality of electrode 40a, and a plurality of electrode 40a are the metal key-press 10a of corresponding first panel 10 respectively; For example; Illustrated metal key-press 10a has 5, and electrode 40a also has 5, and is corresponding one by one with metal key-press 10a.Electrode 40a is an electric conducting material, and its shape is basic identical with the metal key-press zone of first panel 10 with size, and in the present embodiment, electrode 40a is circular, and through hole 20a regional, second panel 20 is corresponding one by one with the metal key-press of first panel 10.
The key system of present embodiment also includes insulation board 3 between key panel 1 and detecting plate 4, the material of insulation board 3 and thickness are all unrestricted, only needs after key panel 1, insulation board 3 and detecting plate 4 combine, key panel 1 and 4 insulation of detecting plate to be got final product.Generalized section after key panel 1, insulation board 3 and detecting plate 4 combine is as shown in Figure 4; Key panel 1, insulation board 3 and detecting plate 4 fit tightly; Only has the gap between the key panel 1 of metal key-press 10a region and the insulation board 3; This gap is the groove of the second surface 12 of key panel 1, in the present embodiment, is the through hole 20a of second panel 20.
In other embodiments; Also can not adopt insulation board; And adopt other modes that key panel 1 and detecting plate 4 are combined and make to insulate between the two; For example lay a coat of paint with the surface that key panel 1 combines on surface that key panel 1 combines with detecting plate 4 or at detecting plate 4, it is bonding with both to pass through viscose then; Perhaps directly both are bonding at the full viscose of surfaces coated.
The key system of present embodiment can also comprise the testing circuit (not shown) that links to each other with said electrode, and the button that is touched is confirmed in the variation of the electrical parameter (for example voltage or electric current) through detecting electrode, and testing circuit can utilize microcontroller (MCU) to realize.Testing circuit can be integrated on the detecting plate 4, and detecting plate 4 can be printed circuit board (PCB) (PCB) or tin indium oxide (ITO) film.
Testing circuit can adopt simple capacitance key detection mode or inductance type button detection mode; Because detection mode is simple; Therefore testing circuit adopts MCU cheaply, and for example 8 MCU can realize, below in conjunction with the principle of Fig. 4 and these two kinds of detection modes of Fig. 7 simple declaration.
For the capacitance key detection mode, need the current potential of the button 10a on the key panel 1 be fixed, in the present embodiment; Because key panel 1 is the all-metal panel; Can be with key panel 1 ground connection, the button 10a on the key panel 1 has fixing current potential like this, i.e. 0 current potential.Capacitance C between the electrode 40a on button 10a on the key panel 1 and the detecting plate 4 can use formula (1) expression:
Wherein, ε is a dielectric constant, and is relevant with the medium between button and the electrode, S be between button and the electrode over against area, d is button and distance between electrodes.When button was not touched, button and distance between electrodes were d1 shown in Figure 4, when button is touched; As shown in Figure 7, miniature deformation takes place at the key position place that is touched in key panel 1, and button and distance between electrodes are reduced to d2; Therefore, the capacitance between button and the electrode increases, correspondingly; Voltage on the electrode increases, and can detect the electrode corresponding key that voltage changes thus and be triggered.
For inductance type button detection mode, need the current potential of the button 10a on the key panel 1 not fixed, and the electrode 40a on the detecting plate 4 is an induction coil as shown in Figure 8 that the inductance value L that is coupled on the electrode (being induction coil) can use formula (2) expression:
Wherein, r is the radius of induction coil, and N is the number of turn of induction coil, and d is the distance between button and the electrode (induction coil).When button was not touched, button and distance between electrodes were d1 shown in Figure 4, when button is touched; As shown in Figure 7, miniature deformation takes place at the key position place that is touched in key panel 1, and button and distance between electrodes are reduced to d2; Therefore; The inductance value that is coupled to the inductance value L on the electrode increases, correspondingly, and the voltage V on the electrode
LIncrease, can detect the electrode corresponding key that voltage changes thus and be touched.
The key system of present embodiment, owing to be easy to take place deformation at the metal in metal key-press zone, so touch key-press can make the metal generation deformation of key position in other words applying very light pressure (generally only needing the pressure about 50g) on the button.And, owing to have only the metal of key position just deformation can take place,, for example have only the deformation of 0.12 μ m also can be detected, thereby when realizing touch or light pressure button, avoided false triggering even there is small deformation in the metal key-press zone.
Need to prove; The foregoing description is that example describes with all-metal key panel; But it is all-metal that said structure is not limited to key panel, and for example, key panel adopts the flexible metal at the material of key area; And key panel can some or all of according to the actual requirements employing other materials, for example plastics etc. at the material of non-key area.Perhaps; Key panel is divided into first panel that is provided with metal key-press and second panel with through hole; First panel is the flexible metal panel, and second panel is the higher and nonmetal cheaply panel of hardness, for example ceramic panel; To support first panel well, to make the panel of winning only at key position deformation takes place easily.
Though the present invention with preferred embodiment openly as above; But it is not to be used for limiting the present invention; Any those skilled in the art are not breaking away from the spirit and scope of the present invention; Can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that claim of the present invention was defined.
Claims (12)
1. a key panel is characterized in that, comprising: be provided with the first surface of a plurality of metal key-press and with respect to the second surface of said first surface, said second surface has the groove of the corresponding said metal key-press of a plurality of difference.
2. key panel according to claim 1 is characterized in that, comprising:
First panel comprises said first surface and with respect to the 3rd surface of said first surface;
Second panel comprises a plurality of through holes, said second surface and with respect to the 4th surface of said second surface, said a plurality of through holes are the metal key-press of corresponding said first surface respectively, fits with said the 3rd surface in said the 4th surface.
3. key panel according to claim 2 is characterized in that, the material of said first panel is the flexible metal, and the material of said second panel is a rigid material.
4. key panel according to claim 3 is characterized in that, the material of said first panel is aluminium or copper, and the material of said second panel is steel or pottery.
5. key panel according to claim 2 is characterized in that the thickness of said first panel is less than or equal to the thickness of said second panel.
6. key panel according to claim 2 is characterized in that, the thickness of said first panel is 0.2～0.6mm, and the thickness of said second panel is 0.6～0.8mm.
7. according to each described key panel of claim 2 to 6, it is characterized in that the metal key-press area part hollow out of said first panel.
8. a key system is characterized in that, comprising: each described key panel of claim 1 to 7; The detecting plate that combines with said key panel insulate between said key panel and the detecting plate; Said detecting plate comprises the electrode of the corresponding said metal key-press of a plurality of difference.
9. key system according to claim 8 is characterized in that said key panel has fixing current potential.
10. key system according to claim 8 is characterized in that, said electrode is an induction coil.
11. key system according to claim 8 is characterized in that, also comprises: the testing circuit that links to each other with said electrode.
12. key system according to claim 8 is characterized in that, said testing circuit is 8 8-digit microcontrollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011102506599A CN102386006A (en) | 2011-08-29 | 2011-08-29 | Key panel and key system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102506599A CN102386006A (en) | 2011-08-29 | 2011-08-29 | Key panel and key system |
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| CN104257429A (en) * | 2014-09-30 | 2015-01-07 | 迈柯唯医疗设备(苏州)有限公司 | Touch type sensing handle for medical tower crane |
| CN104702260A (en) * | 2014-06-20 | 2015-06-10 | 广东美的厨房电器制造有限公司 | Metal touch-key device |
| CN104756406A (en) * | 2012-10-31 | 2015-07-01 | 因温特奥股份公司 | Input device and method for generating a control signal |
| CN105099427A (en) * | 2015-07-14 | 2015-11-25 | 佛山市顺德区美的电热电器制造有限公司 | Metal touch control keystroke component and household electric appliance |
| CN107204763A (en) * | 2016-03-17 | 2017-09-26 | 峰范（北京）科技有限公司 | Metal touch control key strcture |
| CN109167593A (en) * | 2018-11-09 | 2019-01-08 | 厦门星科电子有限公司 | A kind of aluminium alloy touch panel |
| CN110267143A (en) * | 2019-06-25 | 2019-09-20 | 歌尔科技有限公司 | A kind of touch detecting apparatus and earphone |
| CN110401895A (en) * | 2019-07-31 | 2019-11-01 | 国金黄金股份有限公司 | Control method and device, storage medium and the processor of speaker |
| CN113571364A (en) * | 2021-07-26 | 2021-10-29 | 深圳市八佰智能锁业有限公司 | Control device and control method of key panel |
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| CN110401895A (en) * | 2019-07-31 | 2019-11-01 | 国金黄金股份有限公司 | Control method and device, storage medium and the processor of speaker |
| CN113571364A (en) * | 2021-07-26 | 2021-10-29 | 深圳市八佰智能锁业有限公司 | Control device and control method of key panel |
| CN113571364B (en) * | 2021-07-26 | 2024-04-02 | 深圳市八佰智能锁业有限公司 | Control device and control method for key panel |
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Application publication date: 20120321 |