CN204884968U - Keyboard switch - Google Patents
Keyboard switch Download PDFInfo
- Publication number
- CN204884968U CN204884968U CN201520625048.1U CN201520625048U CN204884968U CN 204884968 U CN204884968 U CN 204884968U CN 201520625048 U CN201520625048 U CN 201520625048U CN 204884968 U CN204884968 U CN 204884968U
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- spring
- base
- sensing element
- keyboard switch
- button
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Abstract
The utility model provides a keyboard switch, the on -line screen storage device comprises a base, install the resistance -type pressure sensor on the base, the spring on resistance -type pressure sensor is pressed to the setting in the base, push down the spring and with base sliding fit's button, push down the button and with the upper cover of base looks adaptation, resistance -type pressure sensor includes two terminals and elasticity sensing element, have in the elasticity sensing element resistance can with the resistance strain gauge who executes pressure on the elasticity sensing element relation of being directly proportional, resistance strain gauge outwards extends two lead wires, two terminal one end are respectively with two pin connection, the other end of two terminals all is connected with the PCB board. The utility model discloses an aspect has avoided keyboard switch because of contact deformation, oxidation contact failure, has improved keyboard switch's life, on the other hand can realize the linear input/output of keyboard switch electric current, only needs to use very little power, just can switch on the key switch, has improved the sensitivity and the commonality of key switch.
Description
Technical field
The utility model relates to keyboard technique field, particularly relates to a kind of keyboard switch.
Background technology
Along with the development of computer, the update of computer software with constantly upgrade, become people with computer Entertainment and use the requisite project of computer, in present most computer game, computer user pursues typewriting, that plays games is brisk and neat, feel fast, all with the keyboard of mechanical shaft type, requirement is reached to keyboard, so mechanical shaft type switchboards is the first-selected keyboard of computer game player, but two electrodes of existing mechanical axis switch use hard contact frictional contact, it is the current lead-through mode of resistance-type, CONTACT WITH FRICTION is repeatedly needed in hard contact use procedure, so the mechanical axis switch of the type can because of contact deflection, oxidation causes loose contact, and a contact is bad, a keyboard will be caused to become bad product, in addition, the mechanical axis switch of the type can only realize conducting and the disconnection of power supply, and it cannot regulate the translational speed of people or thing in computer game, and versatility is inadequate.
Utility model content
The purpose of this utility model is to provide a kind of keyboard switch for overcoming the problems referred to above.
For reaching this object, the utility model by the following technical solutions:
A kind of keyboard switch, comprise base, be installed on the resistive pressure sensor on described base, be arranged on the spring be pressed on described resistive pressure sensor in described base, push down described spring and the button coordinated with described base sliding, push down described button and the upper cover suitable with described base, described resistive pressure sensor comprises two terminals and elastic sensing element, there is in described elastic sensing element the resistance strain gage that resistance can be proportional with the pressure imposed on described elastic sensing element, described resistance strain gage stretches out two and goes between, two described terminal one end respectively go between described with two are connected, the other end of two described terminals is all connected with pcb board.
Preferably, described resistance strain gage is wire form foil gauge or foil gage.
Further, described resistance strain gage is wire form foil gauge.
Further, described resistance strain gage is made by filamentary silver, and described filamentary silver is fixed in described elastic sensing element by the mode of printing.
As the preferred technical scheme of one, described button comprises button core, the top of described button core is provided with for the force axle to described buttons force, the lower end of described button core is provided with the holding tank that can hold described spring upper end, spring locating shaft is provided with in described holding tank, one end of described spring locating shaft is connected with described button core, and the other end of described spring locating shaft stretches in described spring, for locating described spring.
Preferably, described force axle is cross column.
As the preferred technical scheme of one, described spring is pressed on described elastic sensing element by cushion block.
Spring is pressed on elastic sensing element by cushion block, the stress surface of elastic sensing element is increased, reduce the pressure suffered by elastic sensing element unit are, thus resistive pressure sensor is not easily crushed, improve the useful life of elastic sensing element.
As the preferred technical scheme of one, described cushion block comprises the pressure portion that can contact with described elastic sensing element and the cushion block location division stretched in described spring, described pressure portion and described cushion block location division are all in cylindric, and the external diameter of described pressure portion is greater than the external diameter of described spring.
Concrete, the power put on cushion block realizes by two kinds of modes, and the first is by spring power transmission in cushion block, and namely when applying pressure to the force axle of button, the spring locating shaft of button does not contact with the spring locating shaft of cushion block all the time; The second is by buttons force on cushion block, and namely when applying pressure to the force axle of button, the spring locating shaft of button is directly pressed on the spring locating shaft of cushion block after spring is by Button Compression.
As the preferred technical scheme of one, described resistive pressure sensor is positioned at described base, and two described terminals of described resistive pressure sensor are connected with pcb board through the base plate of described base.
As the preferred technical scheme of one, the base plate that described resistive pressure sensor is detachably installed on described base is positioned at outside described base, and on the base plate of described base, corresponding described spring is provided with and described pressure portion can be made to pass and be pressed on the bottom plate hole of described elastic sensing element.
By being installed on outside base by dismountable for resistive pressure sensor, when resistive pressure sensor because when some reason cannot normally work, staff can be convenient to and changes resistive pressure sensor fast.
Preferably, described pressure portion is provided with the shaft shoulder that outside dimension is greater than described bottom plate hole near one end of described cushion block location division, skid off in base for preventing described cushion block.
As the preferred technical scheme of one, the outside of described elastic sensing element is coated with one deck for the protection of described elastic sensing element not by the plastic film of external injury.
As the preferred technical scheme of one, on described elastic sensing element, the inner chamber of corresponding described spring offers through hole, and the diameter of described through hole is less than or equal to the internal diameter of described spring.
Offer through hole by the inner chamber of spring corresponding on elastic sensing element, spring not only can be pressed on elastic sensing element, also reduce the making material of elastic sensing element, greatly reduce the cost of manufacture of elastic sensing element.
As the preferred technical scheme of one, the described resistance strain gage in described elastic sensing element is arranged at the periphery of described through hole uniformly.
By resistance strain gage in elastic sensing element being arranged at uniformly the periphery of through hole, what spring can be tried one's best is pressed on resistance strain gage, thus pressure elastic sensing element well being sensed be applied thereto change.
As the preferred technical scheme of one, also comprise still and moving plate, described still and described moving plate are installed in described base, described moving plate comprises moving plate body and bends along described moving plate bodies top the contact site extended downwards, the both sides of described contact site are respectively extended with pushing piece, and described button core is outward extended with the pushing block for promoting described pushing piece on the side wall surface of described moving plate.
As the preferred technical scheme of one, described button core is dismountable Split type structure, the driven member that described button core comprises the central layer for connecting described force axle and described spring locating shaft and matches with described central layer, described holding tank is arranged in the lower end of described central layer, described pushing block is arranged on the lateral wall of described driven member, described central layer and the slideable toward each other connection of described driven member, described central layer and described driven member are equipped with respectively the first limiting section for preventing described central layer and described driven member from departing from and the second limiting section, described first limiting section and described second limiting section are separated from one another or contact and compress with the slip of described button core, described central layer is provided with the first pars stridulans, described driven member is provided with to coordinate with described first pars stridulans and collides sonorific second pars stridulans, described first pars stridulans and described second pars stridulans slide with pressing down of described button core and impinging one anotherly to compress, described first pars stridulans and described second pars stridulans separated from one another with the upwards reset of described button core.
Concrete, when active force act on force axle button core is pressed down time, the first pars stridulans on central layer and the second pars stridulans on driven member slide with pressing down of button core and impinging one anotherly to sound, like this, user's keyboard when knocking can be sounded, thus obtain better feel when user is operated, be also convenient to simultaneously user can clear perception oneself operation time knock state.
Further, there is in the middle of described driven member the containing cavity of its upper and lower end face through, described second limiting section is arranged on the inwall of described containing cavity, the lower end of described driven member is stretched in described containing cavity, described first limiting section is positioned at the below of described second limiting section, the lower end of described driven member extends to form elastic arm downwards, the free end bending extension of described first limiting section own elasticity arm forms, described first pars stridulans is positioned at the top of driven member, and described second pars stridulans is arranged at the top of described driven member.
The beneficial effects of the utility model are: resistance strain gage is exactly a resistance, in a static condition, the resistance of resistance strain gage is very large, therefore two lead-in wire in electric current very little, this state lower keyboard switch cannot conducting, after apply pressure on the effective area of elastic sensing element, the resistance of resistance strain gage can reduce accordingly along with the increase of pressure, when being reduced to a certain degree, keyboard switch will conducting, and the reduction of resistance along with resistance strain gage, the electric current of keyboard switch also can increase thereupon accordingly, thus make player press on keyboard switch to regulate the translational speed of people or thing in computer game by suitable.Relative with prior art, the utility model avoids keyboard switch on the one hand because of contact deflection, the oxidation loose contact that causes, and improves the useful life of keyboard switch; On the other hand the linear input and output of keyboard switch electric current can be realized, only very little power need be used, just can conducting key switch, improve sensitivity and the versatility of key switch.
Accompanying drawing explanation
The cutaway view of keyboard switch of Fig. 1 for providing according to the utility model first embodiment.
The exploded perspective view of keyboard switch of Fig. 2 for providing according to the utility model first embodiment.
The cutaway view of keyboard switch of Fig. 3 for providing according to the utility model second embodiment.
The exploded perspective view of keyboard switch of Fig. 4 for providing according to the utility model second embodiment.
The cutaway view of keyboard switch of Fig. 5 for providing according to the utility model the 3rd embodiment.
The exploded perspective view of keyboard switch of Fig. 6 for providing according to the utility model the 3rd embodiment.
The exploded perspective view of keyboard switch of Fig. 7 for providing according to the utility model the 6th embodiment.
The exploded perspective view of keyboard switch of Fig. 8 for providing according to the utility model the 7th embodiment.
In figure:
1, base; 11, bottom plate hole; 2, upper cover; 3, spring; 4, button; 41, button core; 411, central layer; 4111, the first limiting section; 4112, the first pars stridulans; 4113, elastic arm; 412, driven member; 4121, the second limiting section; 4122, the second pars stridulans; 42, exert a force axle; 43, spring locating shaft; 44, pushing block; 5, resistive pressure sensor; 51, elastic sensing element; 52, resistance strain gage; 53, terminal; 54, go between; 6, pcb board; 7, cushion block; 71, pressure portion; 72, cushion block location division; 73, the shaft shoulder; 8, moving plate; 81, moving plate body; 82, contact site; 83, pushing piece; 9, still.
Embodiment
The technical solution of the utility model is further illustrated by embodiment below in conjunction with accompanying drawing.
Embodiment one:
As Fig. 1 and Fig. 2 shows, present embodiment discloses a kind of keyboard switch, it comprises base 1, be installed on the resistive pressure sensor 5 on base 1, be arranged on the spring 3 on the be pressed on resistive pressure sensor 5 in base 1, pressing spring 3 button 4 be slidably matched with base 1, push down button 4 and the upper cover 2 suitable with base 1, resistive pressure sensor 5 comprises two terminals 53 and elastic sensing element 51, there is in elastic sensing element 51 resistance strain gage 52 that resistance can be proportional with the pressure imposed on elastic sensing element 51, resistance strain gage 52 stretches out two and goes between 54, two terminal 53 one end go between with two respectively and 54 to be connected, the other end of two terminals 53 is all connected with pcb board 6.
Concrete, resistance strain gage 52 is exactly a resistance, in a static condition, the resistance of resistance strain gage 52 is very large, therefore two lead-in wire 54 in electric current very little, this state lower keyboard switch cannot conducting, after the effective area at elastic sensing element 51 applies pressure, the resistance of resistance strain gage 52 can reduce accordingly along with the increase of pressure, when being reduced to a certain degree, keyboard switch will conducting, and the reduction of resistance along with resistance strain gage 52, the electric current of keyboard switch also can increase thereupon accordingly, thus make player press on keyboard switch to regulate the translational speed of people or thing in computer game by suitable, the utility model avoids keyboard switch on the one hand because of contact deflection, oxidation causes loose contact, improve the useful life of keyboard switch, on the other hand the linear input and output of keyboard switch electric current can be realized, only very little power need be used, just can conducting key switch, improve sensitivity and the versatility of key switch.
Button 4 comprises button core 41, the top of button core 41 is provided with the force axle 42 for exerting a force to button 4, the lower end of button core 41 is provided with the holding tank that can hold spring 3 upper end, spring locating shaft 43 is provided with in holding tank, one end of spring locating shaft 43 is connected with button core 41, the other end of spring locating shaft 43 stretches in spring 3, for retainer spring 3.
Preferably, axle 42 is exerted a force in cross column.
In the present embodiment, resistive pressure sensor 5 is positioned at base 1, and the base plate that two butt 53 of resistive pressure sensor 5 pass base 1 is connected with pcb board 6.
Resistance strain gage 52 is wire form foil gauge or foil gage.In the present embodiment, resistance strain gage 52 is wire form foil gauge.
Preferably, resistance strain gage 52 is made by filamentary silver, and filamentary silver is fixed in elastic sensing element 51 by the mode of printing.
Embodiment two:
As shown in Figure 3 and Figure 4, the difference of the present embodiment and embodiment one is: spring 3 is not directly be pressed on resistance strain gage 52, but is pressed on elastic sensing element 51 by cushion block 7.
Spring 3 is pressed on elastic sensing element 51 by cushion block 7, the stress surface of elastic sensing element 51 is increased, reduce the pressure suffered by elastic sensing element 51 unit are, thus resistive pressure sensor 5 is not easily crushed, improve the useful life of elastic sensing element 51.
Cushion block 7 comprises the pressure portion 71 that can contact with elastic sensing element 51 and the cushion block location division 72 stretched in spring 3, and pressure portion 71 and cushion block location division 72 are all in cylindric, and the external diameter of pressure portion 71 is greater than the external diameter of spring 3.
In the present embodiment, the power put on cushion block 7 realizes by two kinds of modes, the first is by spring 3 power transmission in cushion block 7, and namely when applying pressure to the force axle 42 of button 4, the spring locating shaft 43 of button 4 does not contact with the spring locating shaft 43 of cushion block 7 all the time; The second forces on cushion block 7 by button 4, and namely when applying pressure to the force axle 42 of button 4, the spring locating shaft 43 of button 4 is directly pressed on the spring locating shaft 43 of cushion block 7 after spring 3 is compressed by button 4.
Embodiment three:
As shown in Figure 5 and Figure 6, the difference of the present embodiment and embodiment two is: the base plate that resistive pressure sensor 5 is detachably installed on base 1 is positioned at outside base 1, and on the base plate of base 1, corresponding spring 3 is provided with and pressure portion 71 can be made to pass and the bottom plate hole 11 being pressed on elastic sensing element 51.
By being installed on outside base 1 by dismountable for resistive pressure sensor 5, when resistive pressure sensor 5 because when some reason cannot normally work, staff can be convenient to and changes resistive pressure sensor 5 fast.
In order to make cushion block 7 can not skid off in base 1, pressure portion 71 is provided with the shaft shoulder 73 that outside dimension is greater than bottom plate hole 11 near one end of cushion block location division 72.
Embodiment four:
The difference of the present embodiment and embodiment one is: the outside of elastic sensing element 51 is coated with one deck for the protection of elastic sensing element 51 not by the plastic film of external injury.Plastic film is a kind of diaphragm for the protection of electronic product; certainly; the present embodiment is not limited only to plastic film for the protection of the diaphragm of elastic sensing element 51, and what other those skilled in the art were known can be used to protect the diaphragm of elastic sensing element 51 to be also applicable to the utility model.
Embodiment five:
The present embodiment is with the difference of embodiment one: on elastic sensing element 51, the inner chamber of corresponding spring 3 offers through hole, and the diameter of through hole is less than or equal to the internal diameter of spring 3.
Offer through hole by the inner chamber of spring 3 corresponding on elastic sensing element 51, spring 3 not only can be pressed on elastic sensing element 51, also reduce the making material of elastic sensing element 51, greatly reduce the cost of manufacture of elastic sensing element 51.
Resistance strain gage 52 in elastic sensing element 51 is arranged at the periphery of through hole uniformly.
By resistance strain gage 52 in elastic sensing element 51 is arranged at the periphery of through hole uniformly, what spring 3 can be tried one's best is pressed on resistance strain gage 52, thus pressure elastic sensing element 51 well being sensed be applied thereto change.
Embodiment six:
As shown in Figure 7, the difference of the present embodiment and embodiment one is: also comprise still 9 and moving plate 8, still 9 and moving plate 8 are installed in base 1, moving plate 8 comprises moving plate body 81 and bends the contact site 82 extended along moving plate body 81 top downwards, the both sides of contact site 82 are respectively extended with pushing piece 83, and button core 41 is outward extended with the pushing block 44 for promoting pushing piece 83 on the side wall surface of moving plate 8.The setting of moving plate 8 and still 9, can to a certain degree when increasing the handling property of keyboard button.
In the present embodiment, button core 41 is to produce the integrative-structure clashing into sound.
Embodiment seven:
As shown in Figure 8, the difference of the present embodiment and embodiment six is: button core 41 is dismountable Split type structure, the driven member 412 that button core 41 comprises the central layer 411 for connecting force axle 42 and spring locating shaft 43 and matches with central layer 411, holding tank is arranged in the lower end of central layer 411, pushing block 44 is arranged on the lateral wall of driven member 412, central layer 411 and the slideable toward each other connection of driven member 412, central layer 411 and driven member 412 are equipped with respectively the first limiting section 4111 and the second limiting section 4121 for preventing central layer 411 and driven member 412 from departing from, first limiting section 4111 and the second limiting section 4121 are separated from one another or contact and compress with the slip of button core 41, central layer 411 is provided with the first pars stridulans 4112, driven member 412 is provided with to coordinate with the first pars stridulans 4112 and collides sonorific second pars stridulans 4122, first pars stridulans 4112 and the second pars stridulans 4122 slide with pressing down of button core 41 and impinging one anotherly to compress, first pars stridulans 4112 and the second pars stridulans 4122 separated from one another with the upwards reset of button core 41.
There is in the middle of driven member 412 containing cavity of its upper and lower end face through, second limiting section 4121 is arranged on the inwall of containing cavity, the lower end of driven member 412 is stretched in containing cavity, first limiting section 4111 is positioned at the below of the second limiting section 4121, the lower end of driven member 412 extends to form elastic arm 4113 downwards, the free end bending extension of the first limiting section 4111 own elasticity arm 4113 forms, and the first pars stridulans 4112 is positioned at the top of driven member 412, and the second pars stridulans 4122 is arranged at the top of driven member 412.
Concrete, when active force act on force axle 42 button core 41 is pressed down time, the first pars stridulans 4112 on central layer 411 and the second pars stridulans 4122 on driven member 412 slide with pressing down of button core 41 and impinging one anotherly to sound, like this, user's keyboard when knocking can be sounded, thus obtain better feel when user is operated, be also convenient to simultaneously user can clear perception oneself operation time knock state.
Below know-why of the present utility model is described in conjunction with specific embodiments.These describe just in order to explain principle of the present utility model, and can not be interpreted as the restriction to the utility model protection range by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present utility model, and these modes all will fall within protection range of the present utility model.
Claims (10)
1. a keyboard switch, it is characterized in that, comprise base, be installed on the resistive pressure sensor on described base, be arranged on the spring be pressed on described resistive pressure sensor in described base, push down described spring and the button coordinated with described base sliding, push down described button and the upper cover suitable with described base, described resistive pressure sensor comprises two terminals and elastic sensing element, there is in described elastic sensing element the resistance strain gage that resistance can be proportional with the pressure imposed on described elastic sensing element, described resistance strain gage stretches out two and goes between, two described terminal one end respectively go between described with two are connected, the other end of two described terminals is all connected with pcb board.
2. a kind of keyboard switch according to claim 1, it is characterized in that, described button comprises button core, the top of described button core is provided with for the force axle to described buttons force, the lower end of described button core is provided with the holding tank that can hold described spring upper end, is provided with spring locating shaft in described holding tank, and one end of described spring locating shaft is connected with described button core, the other end of described spring locating shaft stretches in described spring, for locating described spring.
3. a kind of keyboard switch according to claim 1, is characterized in that, described spring is pressed on described elastic sensing element by cushion block.
4. a kind of keyboard switch according to claim 3, it is characterized in that, described cushion block comprises the pressure portion that can contact with described elastic sensing element and the cushion block location division stretched in described spring, described pressure portion and described cushion block location division are all in cylindric, and the external diameter of described pressure portion is greater than the external diameter of described spring.
5. a kind of keyboard switch according to any one of Claims 1-4, is characterized in that, described resistive pressure sensor is positioned at described base, and two described terminals of described resistive pressure sensor are connected with pcb board through the base plate of described base.
6. a kind of keyboard switch according to claim 4, it is characterized in that, the base plate that described resistive pressure sensor is detachably installed on described base is positioned at outside described base, and on the base plate of described base, corresponding described spring is provided with and described pressure portion can be made to pass and be pressed on the bottom plate hole of described elastic sensing element.
7. a kind of keyboard switch according to claim 1, is characterized in that, the outside of described elastic sensing element is coated with one deck for the protection of described elastic sensing element not by the plastic film of external injury.
8. a kind of keyboard switch according to claim 1, is characterized in that, on described elastic sensing element, the inner chamber of corresponding described spring offers through hole, and the diameter of described through hole is less than or equal to the internal diameter of described spring.
9. a kind of keyboard switch according to claim 2, it is characterized in that, also comprise still and moving plate, described still and described moving plate are installed in described base, described moving plate comprises moving plate body and bends along described moving plate bodies top the contact site extended downwards, the both sides of described contact site are respectively extended with pushing piece, and described button core is outward extended with the pushing block for promoting described pushing piece on the side wall surface of described moving plate.
10. a kind of keyboard switch according to claim 9, it is characterized in that, described button core is dismountable Split type structure, the driven member that described button core comprises the central layer for connecting described force axle and described spring locating shaft and matches with described central layer, described holding tank is arranged in the lower end of described central layer, described pushing block is arranged on the lateral wall of described driven member, described central layer and the slideable toward each other connection of described driven member, described central layer and described driven member are equipped with respectively the first limiting section for preventing described central layer and described driven member from departing from and the second limiting section, described first limiting section and described second limiting section are separated from one another or contact and compress with the slip of described button core, described central layer is provided with the first pars stridulans, described driven member is provided with to coordinate with described first pars stridulans and collides sonorific second pars stridulans, described first pars stridulans and described second pars stridulans slide with pressing down of described button core and impinging one anotherly to compress, described first pars stridulans and described second pars stridulans separated from one another with the upwards reset of described button core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520625048.1U CN204884968U (en) | 2015-08-19 | 2015-08-19 | Keyboard switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520625048.1U CN204884968U (en) | 2015-08-19 | 2015-08-19 | Keyboard switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204884968U true CN204884968U (en) | 2015-12-16 |
Family
ID=54829316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520625048.1U Withdrawn - After Issue CN204884968U (en) | 2015-08-19 | 2015-08-19 | Keyboard switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204884968U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105185635A (en) * | 2015-08-19 | 2015-12-23 | 东莞市凯华电子有限公司 | Keyboard switch |
| TWI623953B (en) * | 2016-10-28 | 2018-05-11 | 致伸科技股份有限公司 | Keyboard |
| CN108382300A (en) * | 2018-02-19 | 2018-08-10 | 张晓瑜 | Button of getting off protects control method |
| CN111882933A (en) * | 2020-08-11 | 2020-11-03 | 咸阳师范学院 | English word memory auxiliary device and method |
-
2015
- 2015-08-19 CN CN201520625048.1U patent/CN204884968U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105185635A (en) * | 2015-08-19 | 2015-12-23 | 东莞市凯华电子有限公司 | Keyboard switch |
| WO2017028702A1 (en) * | 2015-08-19 | 2017-02-23 | 东莞市凯华电子有限公司 | Keyboard switch |
| CN105185635B (en) * | 2015-08-19 | 2017-11-14 | 东莞市凯华电子有限公司 | A kind of keyboard switch |
| US10211010B2 (en) | 2015-08-19 | 2019-02-19 | Dongguan City Kaihua Electronics Co., Ltd. | Keyboard switch employing a resistance strain gauge |
| TWI623953B (en) * | 2016-10-28 | 2018-05-11 | 致伸科技股份有限公司 | Keyboard |
| CN108382300A (en) * | 2018-02-19 | 2018-08-10 | 张晓瑜 | Button of getting off protects control method |
| CN108382300B (en) * | 2018-02-19 | 2020-10-27 | 日照朝一科技创新发展有限公司 | Get-off button protection control method |
| CN111882933A (en) * | 2020-08-11 | 2020-11-03 | 咸阳师范学院 | English word memory auxiliary device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151216 Effective date of abandoning: 20171114 |