CN213279618U - On-off device of capacitive touch key - Google Patents
On-off device of capacitive touch key Download PDFInfo
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- CN213279618U CN213279618U CN202022108410.1U CN202022108410U CN213279618U CN 213279618 U CN213279618 U CN 213279618U CN 202022108410 U CN202022108410 U CN 202022108410U CN 213279618 U CN213279618 U CN 213279618U
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- touch key
- capacitive touch
- switch tube
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Abstract
The utility model relates to an electronic equipment switch technical field, concretely relates to on-off device of electric capacity touch button. The on-off device of the capacitive touch key comprises a capacitive touch key device, the capacitive touch key device is connected with a switch tube U2 and a single chip microcomputer device, and the switch tube U2 is connected with the single chip microcomputer device and a load terminal, so that the on-off device of the capacitive touch key can store information such as configuration data operation parameters and avoid system files from being damaged.
Description
Technical Field
The utility model relates to an electronic equipment switch technical field, concretely relates to on-off device of electric capacity touch button.
Background
At present, most of electronic equipment startup and shutdown circuits are mainly mechanical keys and a startup and shutdown system with forced power-off, and due to certain abrasion of the mechanical keys, the keys are damaged in the continuous startup and shutdown process, so that the service life is short; in addition, the mechanical keys are used for a long time, and the mechanical deformation causes the waterproof and dustproof deterioration of the equipment shell.
Most electronic devices are powered off in a forced power-off manner, which may cause the devices to lose user configuration data and operating parameters, or even damage system files.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, and the switch device of the capacitive touch key can store information such as configuration data operation parameters and avoid system file damage.
The utility model discloses a solve the technical scheme that its technical problem adopted and do: the on-off device of the capacitive touch key comprises a capacitive sensing touch key device, wherein the capacitive sensing touch key device is connected with a switch tube U2 and a single chip microcomputer device, and the switch tube U2 is connected with the single chip microcomputer device and a load terminal.
The utility model discloses set up, carry out the keying operation through electric capacity response touch button device, electric capacity response touch button device is after sensing the keying operation, to switch tube U2 signals, carries out power supply operation or outage operation to singlechip device and load terminal respectively after the switching on and shutting down received relevant signal.
The capacitance induction touch key device comprises a key induction disk T1 and a touch induction chip U1 connected with the key induction disk T1, wherein the output end of the touch induction chip U1 is connected with the switch tube U2 and the single chip microcomputer device.
Touch-sensitive chip U1 passes through the on-off circuit and connects singlechip device and switch tube U2, the on-off circuit includes the diode VD1 with touch-sensitive chip U1 intercommunication, diode VD1 is connected with triode Q1 and triode Q2, the basic level of triode Q1 is connected diode VD1, triode Q1's collecting electrode is connected switch tube U2, triode Q2's collecting electrode is connected diode VD1, and the basic level of triode Q2 is connected the singlechip device, triode Q1 and triode Q2's projecting pole all ground connection.
And the switching tube U2 is connected with a +5V power supply and a VCC power supply.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a switch on/off device of electric capacity touch button abandons the mechanical type button and forces the shutdown mode of outage, makes electronic equipment life longer, avoids forcing the outage to lose data, damage system file.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings:
examples
As shown in fig. 1, the capacitive touch key device is provided, the capacitive touch key device is connected with a switch tube U2 and a single chip microcomputer device, and the switch tube U2 is connected with the single chip microcomputer device and a load terminal.
The capacitance induction touch key device comprises a key induction disk T1 and a touch induction chip U1 connected with the key induction disk T1, wherein the output end of the touch induction chip U1 is connected with a switch tube U2 and the single chip microcomputer device.
The touch sensing chip U1 is connected with the single chip microcomputer device and the switch tube U2 through a switching circuit, the switching circuit comprises a diode VD1 communicated with the touch sensing chip U1, the diode VD1 is connected with a triode Q1 and a triode Q2, the base level of the triode Q1 is connected with the diode VD1, the collector electrode of the triode Q1 is connected with the switch tube U2, the collector electrode of the triode Q2 is connected with the diode VD1, the base level of the triode Q2 is connected with the single chip microcomputer device, and the emitter electrodes of the triode Q1 and the triode Q2 are all grounded.
The switch tube U2 is connected with a +5V power supply and a VCC power supply.
In a power-off state, a +5V power supply connected with a switch tube U2 is powered on, a VCC power supply is powered off, when a key induction disc T1 is pressed, a touch induction chip U1 detects a key action, the output end of OUT1 of the touch induction chip U1 outputs a high level, the base level of a triode Q1 in a switch circuit is pulled high, a triode Q1 is conducted, the G pole of the switch tube U2 is pulled low, the switch tube U2 is conducted, the VCC power supply is powered on to start supplying power to a load and a single-chip microcomputer device, a pin PA6 of the single-chip microcomputer device keeps a low level, after the key induction disc T1 is loosened, the output end of OUT1 of the touch induction chip U1 outputs a low level, the base level of the triode Q1 keeps a high level due to the existence of a diode VD1, the switch tube U2 always keeps a conducting state, and.
In a power-on state, a +5V power supply and a VCC power supply which are connected with a switch tube U2 are powered on, a key induction disc T1 is pressed for a certain time and then loosened, an OUT1 output end of a touch induction chip U1 keeps a high level for a certain time and changes into a low level, the single chip microcomputer device detects that a pin PA5 changes from the low level into the high level for more than a certain time, user configuration data, operation parameters and system files are stored, the single chip microcomputer device detects the level value of the pin PA5 after completion, if the pin PA5 still is in the high level, detection is continued, if the pin PA6 of the single chip microcomputer device changes into the low level, a triode Q2 of a switch circuit is switched on, so that a triode Q1 is switched off, a G pole of a switch tube U2 changes into the high level, a switch tube U2 is.
When the computer is turned off, the single chip microcomputer device detects the level of the pin PA5 for many times so as to prevent the situation of mistaken turning-on caused by pressing the key sensing disc T1 for a long time.
Claims (4)
1. The on-off device of the capacitive touch key is characterized by comprising a capacitive sensing touch key device, wherein the capacitive sensing touch key device is connected with a switch tube U2 and a single chip microcomputer device, and the switch tube U2 is connected with the single chip microcomputer device and a load terminal.
2. The on-off device of the capacitive touch key according to claim 1, wherein the capacitive touch key device comprises a key sensing panel T1 and a touch sensing chip U1 connected to the key sensing panel T1, and an output end of the touch sensing chip U1 is connected to the switch tube U2 and the single chip device.
3. The on-off device of the capacitive touch key according to claim 2, wherein the touch sensing chip U1 is connected to the monolithic device and the switching tube U2 through an on-off circuit, the on-off circuit includes a diode VD1 in communication with the touch sensing chip U1, the diode VD1 is connected to a transistor Q1 and a transistor Q2, the base of the transistor Q1 is connected to the diode VD1, the collector of the transistor Q1 is connected to the switching tube U2, the collector of the transistor Q2 is connected to the diode VD1, the base of the transistor Q2 is connected to the monolithic device, and the emitters of the transistor Q1 and the transistor Q2 are both grounded.
4. The on-off device of the capacitive touch key according to claim 3, wherein the switching tube U2 is connected to a +5V power supply and a VCC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022108410.1U CN213279618U (en) | 2020-09-23 | 2020-09-23 | On-off device of capacitive touch key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022108410.1U CN213279618U (en) | 2020-09-23 | 2020-09-23 | On-off device of capacitive touch key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213279618U true CN213279618U (en) | 2021-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022108410.1U Active CN213279618U (en) | 2020-09-23 | 2020-09-23 | On-off device of capacitive touch key |
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| Country | Link |
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| CN (1) | CN213279618U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614806A (en) * | 2022-02-23 | 2022-06-10 | 宁波伊士通医疗器械有限公司 | Pure hardware general double-key switching circuit |
-
2020
- 2020-09-23 CN CN202022108410.1U patent/CN213279618U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614806A (en) * | 2022-02-23 | 2022-06-10 | 宁波伊士通医疗器械有限公司 | Pure hardware general double-key switching circuit |
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