CN111211766A - Capacitive key structure and keyboard - Google Patents
Capacitive key structure and keyboard Download PDFInfo
- Publication number
- CN111211766A CN111211766A CN202010122583.0A CN202010122583A CN111211766A CN 111211766 A CN111211766 A CN 111211766A CN 202010122583 A CN202010122583 A CN 202010122583A CN 111211766 A CN111211766 A CN 111211766A
- Authority
- CN
- China
- Prior art keywords
- electrode
- signal acquisition
- static
- guiding
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003068 static effect Effects 0.000 claims abstract description 67
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- RKUAZJIXKHPFRK-UHFFFAOYSA-N 1,3,5-trichloro-2-(2,4-dichlorophenyl)benzene Chemical compound ClC1=CC(Cl)=CC=C1C1=C(Cl)C=C(Cl)C=C1Cl RKUAZJIXKHPFRK-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/965—Switches controlled by moving an element forming part of the switch
- H03K17/975—Switches controlled by moving an element forming part of the switch using a capacitive movable element
- H03K17/98—Switches controlled by moving an element forming part of the switch using a capacitive movable element having a plurality of control members, e.g. keyboard
Landscapes
- Input From Keyboards Or The Like (AREA)
Abstract
The invention discloses a capacitive key structure and a keyboard, which comprise a static electrode and a plurality of static electrodes, wherein the static electrode is arranged on a PCB (printed circuit board), and the PCB is provided with a wire which is electrically connected with the static electrode; the guide reset assembly is arranged on the PCB; the movable electrode is arranged on the guide resetting component and is positioned above the static electrode, the movable electrode can be close to or far away from the static electrode under the action of the guide resetting component, and the minimum distance between the movable electrode and the static electrode is larger than zero; and the keycap is connected with the guide resetting component. Static electrode and moving electrode constitute the condenser, and when using, the electrostatic capacitance of condenser can change, and the static electrode is through walking the change signal that line outside sent electrostatic capacitance to judge the button and pressed, in the use, the minimum interval between moving electrode and the static electrode is greater than zero, can avoid moving electrode and static electrode to take place the strain, is favorable to prolonging the life of product.
Description
Technical Field
The invention relates to the technical field of keyboards, in particular to a capacitive key structure and a keyboard.
Background
The current commonly used keyboards comprise a mechanical keyboard and a membrane keyboard, and no matter the mechanical keyboard or the membrane keyboard is used, the triggering mode of the mechanical keyboard or the membrane keyboard is that a conducting circuit is formed by the contact of two electrodes to trigger a signal, the triggering mode can cause electrode strain, so that the triggering of keys is insensitive, and the service life is shortened.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a capacitive key structure which can realize non-contact sensing and prolong the service life of a key.
The invention also provides a keyboard with the capacitance type key structure.
According to the capacitive key structure of the embodiment of the first aspect of the invention, the capacitive key structure comprises a static electrode arranged on a PCB, and a wire electrically connected with the static electrode is arranged on the PCB; the guide reset assembly is arranged on the PCB and covers the static electrode; the movable electrode is arranged on the guide resetting component and is positioned above the static electrode, the movable electrode can be close to or far away from the static electrode under the action of the guide resetting component, and the minimum distance between the movable electrode and the static electrode is larger than zero; and the keycap is connected with the guide resetting component.
The capacitive key structure provided by the embodiment of the invention at least has the following beneficial effects:
static electrode and moving electrode constitute the condenser, when using, after the key cap is pressed, the moving electrode is close to the static electrode under the effect of direction reset assembly, the electrostatic capacity of condenser changes, the static electrode is through walking the change signal that line outside sent electrostatic capacity to judge the button and pressed, in the use, the minimum interval between moving electrode and the static electrode is greater than zero, can avoid moving electrode and static electrode to take place the strain, be favorable to prolonging the life of product.
According to some embodiments of the present invention, the guiding and resetting assembly includes a guiding body, a guiding shaft, and a resetting member, wherein a cavity is disposed in the guiding body, an opening of the cavity faces the static electrode, the guiding shaft is movably disposed through the guiding body, a first end of the guiding shaft is located in the cavity, the dynamic electrode is disposed at the first end of the guiding shaft, a second end of the guiding shaft is connected to the key cap, and the resetting member is disposed outside the guiding body and abuts against the key cap.
According to some embodiments of the present invention, the guiding and resetting assembly includes a guiding body, a guiding shaft, and a resetting member, wherein a cavity is disposed in the guiding body, the cavity opens toward the static electrode, the guiding shaft is movably disposed through the guiding body, a first end of the guiding shaft is located in the cavity, the dynamic electrode is disposed at the first end of the guiding shaft, a second end of the guiding shaft is connected to the keycap, the resetting member is disposed in the cavity, one end of the resetting member abuts against the PCB, and the other end of the resetting member abuts against the guiding shaft.
According to some embodiments of the invention, the return member is a spring or a resilient glue bowl.
According to some embodiments of the invention, the resilient rubber bowl is a silicone bowl or a rubber bowl.
The capacitive keyboard according to the second aspect of the embodiment of the present invention includes a signal acquisition module and at least one key, wherein the key adopts the above capacitive key structure, and the signal acquisition module is electrically connected to the static electrode through the routing line.
The capacitive keyboard provided by the embodiment of the invention at least has the following beneficial effects:
static electrode and moving electrode constitute the condenser, when using, the key cap is pressed the back, the moving electrode is close to the static electrode under the effect of direction reset assembly, the electrostatic capacity of condenser changes, the static electrode sends the change signal of electrostatic capacity to signal acquisition module through walking the line, thereby judge the button and pressed, in the use, the minimum interval between moving electrode and the static electrode is greater than zero, can avoid moving electrode and static electrode to take place the strain, be favorable to prolonging the life of product.
According to some embodiments of the present invention, the signal acquisition module includes a first signal acquisition chip electrically connected to the static electrode of the key.
According to some embodiments of the invention, the signal acquisition module further comprises a second signal acquisition chip to which at least two of the first signal acquisition chips are connected.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic longitudinal sectional view of a capacitive button structure according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a longitudinal cross section of a capacitive button structure according to an embodiment of the present invention;
FIG. 3 is a schematic block diagram of a capacitive keypad according to an embodiment of the present invention;
FIG. 4 is a functional block diagram of a signal acquisition module of the capacitive keypad shown in FIG. 3;
FIG. 5 is a schematic circuit diagram of a first signal acquisition chip in the signal acquisition module shown in FIG. 4;
fig. 6 is a schematic circuit diagram of a second signal acquisition chip in the signal acquisition module shown in fig. 4.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, a first embodiment of the present invention discloses a capacitive button structure, which includes a static electrode 110, a guiding reset component 200, a dynamic electrode 300, and a key cap 400, wherein the static electrode 110 is disposed on a PCB 100, and the PCB 100 is disposed with a trace electrically connected to the static electrode 110, and it should be noted that the trace is a conductive trace on a circuit board. The guiding-resetting assembly 200 is disposed on the PCB 100 and covers the static electrode 110, and it should be noted that the guiding-resetting assembly 200 can be directly or indirectly connected to the PCB 100. The movable electrode 300 is disposed on the guiding reset component 200 and above the static electrode 110, the movable electrode 300 can be close to or far away from the static electrode 110 under the action of the guiding reset component 200, the minimum distance between the movable electrode 300 and the static electrode 110 is greater than zero, and the keycap 400 is connected with the guiding reset component 200. It is contemplated that key cap 400 is disposed over guide reset assembly 200 and that the surface of key cap 400 may be provided with an identifier such as a letter, number, symbol, text or design, etc.
When the key cap 400 is loosened, the guide resetting component 200 drives the key cap 400 and the movable electrode 300 to reset. In the use process, the minimum distance between the movable electrode 300 and the static electrode 110 is greater than zero, so that the movable electrode 300 can be prevented from being in direct contact with the static electrode 110, strain of the movable electrode 300 and the static electrode 110 is avoided, and the service life of a product is prolonged.
Referring to fig. 1, the guiding-resetting assembly 200 includes a guiding body 210, a guiding shaft 220 and a resetting member 230, wherein a cavity 211 is disposed in the guiding body 210, the cavity 211 opens toward the static electrode 110, the guiding shaft 220 movably penetrates through the guiding body 210, it is contemplated that a through hole is disposed on the guiding body 210 so that the guiding shaft 220 penetrates through the guiding body 210, a first end of the guiding shaft 220 is located in the cavity 211, a movable electrode 300 is disposed at a first end of the guiding shaft 220, and specifically, the movable electrode 300 may be adhered or clamped on the guiding shaft 220. It should be noted that, in order to limit the maximum reset stroke of the guide shaft 220 to prevent the guide shaft 220 from being separated from the guide body 210 during reset, the diameter or the side length of the first end of the guide shaft 220 is larger than the diameter of the through hole on the guide body 210. The second end of guide shaft 220 is connected with key cap 400, and specifically, the bottom of key cap 400 is provided with cross fixture block 410, is provided with draw-in groove 221 with the fixture block adaptation on the guide shaft 220, and key cap 400 and guide shaft 220 pass through the cooperation of fixture block 410 and draw-in groove 221 and are mutually detachable to be connected. The guide shaft 220 can move up and down to enable the movable electrode 300 to be far away from or close to the static electrode 110, and due to the fact that the length of the guide shaft 220 is fixed, when the keycap 400 is pressed down, the guide body 210 can limit the maximum stroke of the keycap 400, and therefore the minimum distance between the movable electrode 300 and the static electrode 110 is larger than zero. When the movable electrode 300 approaches the stationary electrode 110, a small amount of air is squeezed, and the squeezed air may be discharged through the assembly gap of the guide body 210 or through the vent hole provided in the guide body 210.
Referring to fig. 1, in some embodiments, the reset member 230 is disposed outside the guide body 210 and abuts against the key cap 400. The reset member 230 has elasticity, when the key cap 400 is pressed down, the reset member 230 compresses and stores energy, when the key cap 400 is released, the reset member 230 releases energy and pushes the key cap 400 to reset, thereby driving the movable electrode 300 to reset.
Referring to fig. 2, in other embodiments, restoring member 230 is disposed in cavity 211, and one end of restoring member 230 abuts against PCB board 100, and the other end of restoring member 230 abuts against the first end of guide shaft 220. In order to prevent the capacitor formed by the movable electrode 300 and the stationary electrode 110 from being damaged, an insulating member is used as the reset member 230, or an insulating process is performed between the PCB 100 and the reset member 230.
In some embodiments, the return member 230 employs a spring or resilient glue bowl. It should be noted that the elastic rubber bowl is a thin-walled structure made of thermoplastic material and has certain elasticity. The spring has stronger elasticity and quicker resetting speed, and is suitable for keys with higher sensitivity requirements. Compared with a spring, the elastic rubber bowl is small in force required by compression, and for keys with long service time, such as keys of an office keyboard, the elastic rubber bowl can reduce the operating pressure of fingers, so that the experience of a user is improved. Specifically, the elastic rubber bowl is a silica gel bowl or a rubber bowl.
Referring to fig. 3, a second embodiment of the present invention discloses a capacitive keyboard, which includes a signal acquisition module 120 and at least one key, where the key adopts the above capacitive key structure, the signal acquisition module 120 is electrically connected to a static electrode 110 of the key through a trace, and the signal acquisition module 120 is configured to acquire a static capacitance signal of the static electrode 110.
The static electrode 110 and the moving electrode 300 form a capacitor, when the capacitive keyboard is powered on, the static capacitance of the static electrode 110 and the moving electrode 300 is initialized, and the signal acquisition module 120 continuously detects the capacitance of the static electrode 110. When using, after key cap 400 is pressed, moving electrode 300 is close to static electrode 110 under the effect of direction reset assembly 200, the electrostatic capacity of condenser changes, static electrode 110 sends the change signal of electrostatic capacity to signal acquisition module 120 through the wire, thereby judge that the button is pressed, in the use, the minimum interval between moving electrode 300 and the static electrode 110 is greater than zero, can avoid moving electrode 300 and static electrode 110 direct contact, thereby avoid moving electrode 300 and static electrode 110 to take place the strain, be favorable to prolonging the life of product.
Referring to fig. 4, the capacitive keypad according to the embodiment of the invention is suitable for different products, such as a computer keyboard, a password input keyboard, or a keyboard of an electronic calculator. According to different product types, the number of keys of the capacitive keypad can be adaptively adjusted, and when the number of keys is small, the signal acquisition module 120 includes a first signal acquisition chip 121, and the first signal acquisition chip 121 is electrically connected to the static electrodes 110 of the keys.
Referring to fig. 5, fig. 5 is a schematic circuit diagram of the signal acquisition module 120 according to one embodiment of the capacitive keypad. The signal acquisition module 120 includes a signal acquisition chip U1 and peripheral circuits thereof, the signal acquisition chip U1 employs a low-power consumption cmos microcontroller, has 32 GPIO (general purpose input output) interfaces, and can be externally connected with up to 32 keys, which meets the key connection requirements of most keyboards, it should be noted that the signal acquisition chip U1 is a preferred embodiment of the first signal acquisition chip 121 according to the embodiment of the present invention, and does not specifically limit the first signal acquisition chip 121. When the key is pressed, the signal acquisition chip U1 can determine that the key is triggered by detecting the change of the electrostatic capacitance of the key, and confirm the characters such as the number, letter or symbol corresponding to the key by looking up the table, and send the output signal corresponding to the characters to the outside. Specifically, the 37 th pin of the signal acquisition chip U1 is one of GPIO interfaces, and the pin is electrically connected to the static electrode 110 of one of the keys through a trace, it should be noted that the trace may further be provided with a resistor R1, and the sensitivity of the change in the electrostatic capacitance of the static electrode 110 may be adjusted by adjusting the resistance of the resistor R1. When the signal acquisition chip U1 detects and determines that the key corresponding to the static electrode 110 is triggered, the signal acquisition chip U1 searches for a character corresponding to the static electrode 110, for example, a number "1", a letter "M", a symbol "+" or the like, and the signal acquisition chip U1 externally transmits an output signal corresponding to the character through the 38 th pin and the 39 th pin.
Referring to fig. 4, in other embodiments, such as a conventional computer keyboard, when the number of keys is large, the signal acquisition module 120 further includes a second signal acquisition chip 122, and the second signal acquisition chip 122 is connected to at least two first signal acquisition chips 121. The first signal acquisition chips 121 are respectively connected with a plurality of keys, after the keys are pressed down, the first signal acquisition chips 121 corresponding to the keys detect and judge the electrostatic capacitance of the keys and send signals triggered by the keys to the second signal acquisition chips 122, and the second signal acquisition chips 122 are used for coordinating the first signal acquisition chips 121 and outputting the signals from the first signal acquisition chips 121.
Referring to fig. 6, fig. 6 is a schematic circuit diagram of the second signal collecting chip 122 of one embodiment of the capacitive keypad. In the embodiment of the present invention, the signal acquisition module 120 includes a signal acquisition chip U4 and peripheral circuits thereof, the signal acquisition chip U4 is connected to four identical first signal acquisition chips 121, wherein please refer to fig. 5 for a schematic circuit diagram of the first signal acquisition chip 121, a 31 st pin and a 32 th pin of the signal acquisition chip U4 are connected to a 39 th pin and a 38 th pin of the signal acquisition chip U1, and similarly, a 29 th pin and a 30 th pin, a 27 th pin and a 28 th pin, and a 25 th pin and a 26 th pin of the signal acquisition chip U4 are respectively connected to the remaining three first signal acquisition chips 121. The 20 th pin and the 21 st pin of the signal acquisition chip U4 are connected to an external communication interface P1, and the external communication interface P1 may specifically be a USB interface.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (8)
1. A capacitive button structure, comprising:
the static electrode (110) is arranged on a PCB (100), and a routing wire electrically connected with the static electrode (110) is arranged on the PCB (100);
a guide reset assembly (200) disposed on the PCB board (100);
a movable electrode (300) disposed on the guided reset component (200) and above the stationary electrode (110), wherein the movable electrode (300) can move close to or away from the stationary electrode (110) under the action of the guided reset component (200), and the minimum distance between the movable electrode (300) and the stationary electrode (110) is greater than zero;
a key cap (400) connected with the guide resetting component (200).
2. The capacitive button structure of claim 1, wherein the guiding and resetting assembly (200) comprises a guiding body (210), a guiding shaft (220), and a resetting member (230), wherein a cavity (211) is formed in the guiding body (210), the cavity (211) is open to the static electrode (110), the guiding shaft (220) is movably disposed through the guiding body (210), a first end of the guiding shaft (220) is located in the cavity (211), the dynamic electrode (300) is disposed at a first end of the guiding shaft (220), a second end of the guiding shaft (220) is connected to the key cap (400), and the resetting member (230) is disposed outside the guiding body (210) and abuts against the key cap (400).
3. A capacitive button structure according to claim 1, wherein the guided reset assembly (200) comprises a guide body (210), a guide shaft (220) and a reset member (230), a concave cavity (211) is arranged in the guide body (210), the opening of the concave cavity (211) faces the static electrode (110), the guide shaft (220) is movably arranged in the guide body (210), and the first end of the guide shaft (220) is positioned in the cavity (211), the moving electrode (300) is arranged at the first end of the guide shaft (220), the second end of the guide shaft (220) is connected with the key cap (400), the resetting member (230) is arranged in the cavity (211), and one end of the reset component (230) is abutted with the PCB (100), the other end of the return member (230) abuts against the guide shaft (220).
4. A capacitive button arrangement according to claim 2 or 3, wherein the return means (230) is a spring or a resilient rubber bowl.
5. The capacitive button structure of claim 4, wherein the elastic rubber bowl is a silicone bowl or a rubber bowl.
6. A capacitive keyboard, comprising a signal acquisition module (120) and at least one key, wherein the key adopts the capacitive key structure of any one of claims 1 to 5, and the signal acquisition module (120) is electrically connected to the static electrode (110) through the trace.
7. The capacitive keyboard according to claim 6, wherein the signal acquisition module (120) comprises a first signal acquisition chip (121), and the first signal acquisition chip (121) is electrically connected to the static electrodes (110) of the keys.
8. The capacitive keypad according to claim 7, wherein the signal acquisition module (120) further comprises a second signal acquisition chip (122), and at least two first signal acquisition chips (121) are connected to the second signal acquisition chip (122).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010122583.0A CN111211766A (en) | 2020-02-27 | 2020-02-27 | Capacitive key structure and keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010122583.0A CN111211766A (en) | 2020-02-27 | 2020-02-27 | Capacitive key structure and keyboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111211766A true CN111211766A (en) | 2020-05-29 |
Family
ID=70786845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010122583.0A Pending CN111211766A (en) | 2020-02-27 | 2020-02-27 | Capacitive key structure and keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111211766A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0238989A2 (en) * | 1986-03-27 | 1987-09-30 | Brother Kogyo Kabushiki Kaisha | Capacitance switching device for keyboard |
| US20120228111A1 (en) * | 2011-03-07 | 2012-09-13 | Pacinian Corporation | Capacitive keyswitch technologies |
| CN104579294A (en) * | 2015-01-07 | 2015-04-29 | 李侃 | Capacitor-type key unit and keyboard with key unit |
| CN204465500U (en) * | 2015-01-19 | 2015-07-08 | 黄俭安 | Capacitive sensing key switch and keyboard using the capacitive sensing key switch |
| US9742402B1 (en) * | 2016-02-24 | 2017-08-22 | Pixart Imaging Inc. | Keyswitch and keyboard with distance detecting function |
| CN108563337A (en) * | 2018-04-03 | 2018-09-21 | 京东方科技集团股份有限公司 | A kind of keyboard and terminal |
| CN211089631U (en) * | 2020-02-27 | 2020-07-24 | 珠海恒宇新科技有限公司 | Capacitive key structure and keyboard |
-
2020
- 2020-02-27 CN CN202010122583.0A patent/CN111211766A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0238989A2 (en) * | 1986-03-27 | 1987-09-30 | Brother Kogyo Kabushiki Kaisha | Capacitance switching device for keyboard |
| US20120228111A1 (en) * | 2011-03-07 | 2012-09-13 | Pacinian Corporation | Capacitive keyswitch technologies |
| CN104579294A (en) * | 2015-01-07 | 2015-04-29 | 李侃 | Capacitor-type key unit and keyboard with key unit |
| CN204465500U (en) * | 2015-01-19 | 2015-07-08 | 黄俭安 | Capacitive sensing key switch and keyboard using the capacitive sensing key switch |
| US9742402B1 (en) * | 2016-02-24 | 2017-08-22 | Pixart Imaging Inc. | Keyswitch and keyboard with distance detecting function |
| CN108563337A (en) * | 2018-04-03 | 2018-09-21 | 京东方科技集团股份有限公司 | A kind of keyboard and terminal |
| CN211089631U (en) * | 2020-02-27 | 2020-07-24 | 珠海恒宇新科技有限公司 | Capacitive key structure and keyboard |
Non-Patent Citations (1)
| Title |
|---|
| 新知识创作室: "《电脑组装与维护高手教程》", vol. 1, 30 November 2002, 西安电子科技大学出版社 , pages: 138 - 139 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20060232559A1 (en) | Capacitive touchpad with physical key function | |
| US9274618B2 (en) | Active capacitive touch pen | |
| EP3168852B1 (en) | Switch assembly and hand-held device | |
| US7952038B1 (en) | Two-stage switch apparatus | |
| ES2050183T3 (en) | PIEZOELECTRIC SWITCH. | |
| KR950702787A (en) | COMPUTER KEYBOARD WITH ELECTROSTATIC DISCHARGE FEATURE | |
| CN110958013B (en) | Steering wheel touch switch structure | |
| CN211089631U (en) | Capacitive key structure and keyboard | |
| US5384688A (en) | Three-dimensional circuits for digitizer and pen-based computer system pen cursors | |
| US9836138B2 (en) | Touch pen | |
| EP1310967A3 (en) | Input device which varies output value in accordance with pressing force | |
| CN111211766A (en) | Capacitive key structure and keyboard | |
| KR20090002648A (en) | Electronics case | |
| JP2007173068A (en) | Switching device | |
| TWI711946B (en) | Stylus structure | |
| US20230403008A1 (en) | Input device, input method and keyboard | |
| KR100528680B1 (en) | Capacitive Touch Switch | |
| CN114446665A (en) | Variable capacitance device, implementation method and pressure switch device | |
| JP2011165384A (en) | Switch device with touch detection function | |
| CN107092368B (en) | Touch control pen | |
| WO2012008629A1 (en) | Debounce switching element incorporating a debounce circuit | |
| CN106452417A (en) | Static capacitance switch button and static capacitance keyboard with adjustable trigger stroke | |
| CN213546179U (en) | Key module, input device and mouse | |
| CN108666168A (en) | A kind of dual control tail of singly opening is by mechanism | |
| CN208903223U (en) | A kind of light sensation keyboard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |