CN202841089U - Power on-off circuit and electronic device having power on-off circuit - Google Patents
Power on-off circuit and electronic device having power on-off circuit Download PDFInfo
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- CN202841089U CN202841089U CN 201220267617 CN201220267617U CN202841089U CN 202841089 U CN202841089 U CN 202841089U CN 201220267617 CN201220267617 CN 201220267617 CN 201220267617 U CN201220267617 U CN 201220267617U CN 202841089 U CN202841089 U CN 202841089U
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Abstract
The utility model relates to a power on-off circuit applied in an electronic device. The power on-off circuit is respectively in electrical connection with a power source of the electronic device, a main control chip and load. The power on-off circuit comprises a press button, the main control chip detects pressing time and frequency of the press button; after the press button is pressed, the power on-off circuit is conductive; when continuous pressing of the press button surpasses pre-set time, the main control chip outputs control level to make the power on-off circuit stay conductive, and current is continuously outputted to the load to accomplish power-on of the electronic device; when the electronic device is in a work state, the main control chip detects pressing frequency of the press button within the pre-set time to realize corresponding press button functions; when the pre-set time of pressing is surpassed, the press button is released, and the main control chip detects corresponding level change and triggers to output control level to disconnect the power on-off circuit to accomplish power-off of the electronic device. The utility model further provides the electronic device having the power on-off circuit.
Description
Technical field
The utility model relates to the on/off circuit of electronic installation, relates in particular to a kind of electronic installation that has the on/off circuit of contact button and have this on/off circuit.
Background technology
Operated by rotary motion has power button and a plurality of function button of realizing respectively difference in functionality of switching on and shutting down on the electronic installation.Along with the trend of electronic device miniaturization, the button of a plurality of function singlenesses is set on electronic installation simultaneously, make easily the structure complicated of electronic installation, and outward appearance seems succinct not, be unfavorable for electronic device miniaturization.
The utility model content
In view of above content, be necessary to provide a kind of use structure more simple on/off circuit.
In addition, also be necessary to provide a kind of electronic installation with this on/off circuit.
A kind of on/off circuit is applied in the electronic installation, and this on/off circuit is electrically connected to respectively power supply, main control chip and the load of electronic installation, and this on/off circuit comprises button.Described main control chip comprises the first pin and the second pin, this button is electrically connected to respectively the first pin of this power supply and this main control chip, this on/off circuit also comprises the first triode, the second triode and field effect transistor, the base stage of this first triode is connected to this button, collector electrode is connected to the grid of this field effect transistor, the base stage of this second triode is connected to the second pin of this main control chip, collector electrode is connected to the grid of this field effect transistor, the source electrode of this field effect transistor is connected to this power supply, drain electrode is connected to load, the first pin of this main control chip is detected time and the frequency that this button is pressed, after button is pressed, the first triode conducting, the field effect transistor conducting is pressed above Preset Time when button connects, the second pin output control level of main control chip makes this second triode conducting, field effect transistor continues conducting, and drain electrode continues to output current to load, to finish the electronic installation start; In the electronic installation operating state, the compression frequency of main control chip the first pin detecting button in Preset Time, the different modes of corresponding pressing keys and realize respectively different keypress functions; This button is pressed above unclamping behind the Preset Time, and this main control chip first pin is detected corresponding level and changed, and triggers the second pin output control level and make the cut-off of the second triode, and the field effect transistor cut-off is to finish the electronic installation shutdown.
Preferably, one end of described button is the first resistance and the second grounding through resistance by connecting successively, and successively by the 3rd resistance and the 4th grounding through resistance of series connection, the 3rd resistance one end is electrically connected between this button and the first resistance, and the other end is by the 4th grounding through resistance.
Preferably, the base stage of described the first triode is electrically connected between the 3rd resistance and the 4th resistance by the 5th resistance, and collector electrode is electrically connected to this power supply, grounded emitter by the 6th resistance and the 7th resistance successively.
Preferably, the first pin of described main control chip is electrically connected between this first resistance and the second resistance, the second pin is electrically connected to the base stage of this second triode by the 8th resistance, the collector electrode of this second triode is electrically connected to the grid of this field effect transistor by the 9th resistance, the 5th resistance one end connects an electric capacity, this electric capacity other end ground connection.
Preferably, described main control chip is CPU (CPU), and this first pin and the second pin are the universal input output pin, and this first triode and the second triode are NPN type triode.
Preferably, when pressing, connects described button, the base stage of this first triode is high level, this the first triode conducting, its collector electrode is low resistance state, the grid of this field effect transistor is low level, this field effect transistor conducting, and its drain electrode outputs current to this load, the first pin of this main control chip detects high level, decontrol after this button is pressed above the default time, the first pin of this main control chip continues to detect high level above behind the Preset Time, triggers the base stage that the second pin continues output high level to the second triode, this the second triode conducting, collector electrode is low resistance state, and the grid of this field effect transistor is continuously low level, continues conducting to keep this field effect transistor.
Preferably, when described electronic installation was in normal operating conditions after the start, the first pin of this main control chip was detected the number of times that this button is pressed in the given time, came the different keypress function of corresponding definition, and realized these keypress functions by this main control chip.
Preferably, described electronic installation is when normal operating conditions, press this button and surpass predetermined time, the first pin of this main control chip continues to detect high level and surpasses predetermined time, triggers this second pin output low level to the base stage of this second triode, this second triode by, collector electrode is high-impedance state, the grid of this field effect transistor is high level, and this field effect transistor is by, drain electrode no current output.
A kind of electronic installation, power supply, main control chip and the load of the electronic installation that comprise on/off circuit, is electrically connected respectively with this on/off circuit, this on/off circuit comprises button.Described main control chip comprises the first pin and the second pin, this button is electrically connected to respectively the first pin of this power supply and this main control chip, this on/off circuit also comprises the first triode, the second triode and field effect transistor, the base stage of this first triode is connected to this button, collector electrode is connected to the grid of this field effect transistor, the base stage of this second triode is connected to the second pin of this main control chip, collector electrode is connected to the grid of this field effect transistor, the source electrode of this field effect transistor is connected to this power supply, drain electrode is connected to load, the first pin of this main control chip is detected time and the frequency that this button is pressed, after button is pressed, the first triode conducting, the field effect transistor conducting is pressed above Preset Time when button connects, the second pin output control level of main control chip makes this second triode conducting, field effect transistor continues conducting, and drain electrode continues to output current to load, to finish the electronic installation start; In the electronic installation operating state, the compression frequency of main control chip the first pin detecting button in Preset Time, the different modes of corresponding pressing keys and realize respectively different keypress functions; This button is pressed above unclamping behind the Preset Time, and this main control chip first pin is detected corresponding level and changed, and triggers the second pin output control level and make the cut-off of the second triode, and the field effect transistor cut-off is to finish the electronic installation shutdown.
On/off circuit of the present utility model only just can be realized multiple different function by a contact button, has saved cost, has simplified the structure of electronic installation.
Description of drawings
Fig. 1 is the circuit diagram of the utility model on/off circuit.
The main element symbol description
| On/off circuit | 10 |
| Main control chip | 20 |
| The one GPIO pin | P1 |
| The 2nd GPIO pin | P2 |
| Power supply | Vcc |
| Load | 30 |
| Button | SW |
| The first triode | Q1 |
| The second triode | Q2 |
| Field effect transistor | M1 |
| The first resistance | R1 |
| The second resistance | R2 |
| The 3rd resistance | R3 |
| The 4th resistance | R4 |
| The 5th resistance | R5 |
| The 6th resistance | R6 |
| The 7th resistance | R7 |
| The 8th resistance | R8 |
| The 9th resistance | R9 |
| Electric capacity | C1 |
Following embodiment further specifies the utility model in connection with above-mentioned accompanying drawing.
Embodiment
See also Fig. 1, the on/off circuit 10 of the utility model preferred embodiment is applied in the electronic installation, is used to switching device of electronic apparatus and realizes corresponding keypress function.This on/off circuit 10 is electrically connected respectively main control chip 20 and the power Vcc in the electronic installation, and is electrically connected to simultaneously load 30.This on/off circuit 10 comprises a button SW, and this button SW is installed on this electronic installation, is used for realizing switching on and shutting down and the corresponding keypress function of this electronic installation.The power Vcc of this electronic installation is these on/off circuit 10 power supplies.This main control chip 20 is detected the state of this button SW, and controls the break-make of this on/off circuit 10, to control the switching on and shutting down of this electronic installation.When this electronic installation during at open state, these on/off circuit 10 output services electric currents are for this load 30 work.
Described on/off circuit 10 comprises this button SW, the first triode Q1, the second triode Q2, field effect transistor M1 and a plurality of resistance R 1-R9.This button SW is the physical button that is installed on this electronic installation, and in the present embodiment, this button SW is the contact button, and this button SW one end is electrically connected to the power Vcc of electronic installation, and this power Vcc is these on/off circuit 10 power supplies.By the first resistance R 1 and the second resistance R 2 ground connection of series connection, this button SW other end also passes through the 3rd resistance R 3 and the 4th resistance R 4 ground connection of series connection to this button SW other end successively successively.Wherein, the 3rd resistance R 3 one ends are electrically connected between this button SW and the first resistance R 1, and the other end is by the 4th resistance R 4 ground connection.
Described main control chip 20 is for being installed on the control chip in the electronic installation, and in the present embodiment, this main control chip 20 is CPU (Central Processing Unit, CPU).This main control chip 20 comprises a GPIO(General Purpose Input Output, universal input output) pin P1 and the 2nd GPIO pin P2.The one GPIO pin P1 is electrically connected between this first resistance R 1 and the second resistance R 2.In the present embodiment, a GPIO pin P1 is used for the pressed state of this button of detecting SW, and carries out different instructions according to the difference of the mode of pressing of button SW.The 2nd GPIO pin P2 is connected to the base stage of this second triode Q2 by the 8th resistance R 8, and main control chip 20 is by the base stage of the 2nd GPIO pin P2 output control level to this second triode Q2, to control the conduction status of this second triode Q2.
The base stage of described the first triode Q1 is electrically connected between the 3rd resistance R 3 and the 4th resistance R 4 by one the 5th resistance R 5, grounded emitter, and collector electrode is electrically connected to power Vcc by the 6th resistance R 6 and the 7th resistance R 7 successively.Also be electrically connected with a capacitor C 1 at the 5th resistance R 5 one ends, these capacitor C 1 one ends are electrically connected between the 4th resistance R 4 and the 5th resistance R 5, its other end ground connection.The grounded emitter of this second triode Q2, collector electrode are electrically connected to the grid of this field effect transistor M1 by the 9th resistance R 9.In the present embodiment, described the first triode Q1 and the second triode Q2 are NPN type triode, play on-off action, triode cut-off when base stage is low level, and collector electrode and emitter are high-impedance state; Triode conducting when base stage is high level, collector electrode and emitter are low resistance state.The grid of described field effect transistor M1 is electrically connected between the 6th resistance R 6 and the 7th resistance R 7, and drain electrode is electrically connected to load 30, and source electrode is electrically connected to power Vcc.In the present embodiment, this field effect transistor M1 plays on-off action, controls the on off operating mode of this field effect transistor M1 by grid, this field effect transistor M1 conducting when grid is low level, this field effect transistor M1 cut-off when grid is high level.
The on/off circuit 10 of present embodiment is mainly detected the compressing time of this button SW and the function that frequency is judged this electronic apparatus system execution start, function button or shutdown by a GPIO pin P1 of main control chip 20.When this electronic installation is in off-mode, the SW that pushes button, this button SW connects this power Vcc, and system power supply is opened, and power Vcc has Voltage-output, and a GPIO pin P1 of this main control chip 20 detects high level.The base stage of this first triode Q1 is high level, this first triode Q1 conducting, and its collector electrode is low resistance state.The grid of this field effect transistor M1 is low level, this field effect transistor M1 conducting, and its drain electrode has electric current to export load 30 to, for load 30 work.Behind the electronic apparatus system power-up initializing, according to the time that this main control chip 20 its GPIO pin of definition P1 continue the detecting level, for example one second of the present embodiment definition, trigger its 2nd GPIO pin P2 and send control level.In the present embodiment, when this button SW pressed above one second, the one GPIO pin P1 of this main control chip 20 detected high level continuously in one second, then trigger its 2nd GPIO pin P2 and continue the output high level, the base stage of this second triode Q2 is high level, this second triode Q2 conducting, its collector electrode is low resistance state, the grid of this field effect transistor M1 continues to present low level, this field effect transistor M1 remains in conducting state, its drain electrode continues output current for load 30 work, thereby finishes the action of electronic installation start.Press the afterwards relieving above a second at this button SW, because the 2nd GPIO pin P2 of this main control chip 20 continues the output high level with the conducting of maintenance field effect transistor M1, so the disconnection of button SW does not affect the break-make of field effect transistor M1.
In this electronic installation course of normal operation, the one GPIO pin P1 of main control chip 20 is by the variation of detecting self incoming level and the mode of pressing that change frequency is detected button SW, break-make and compression frequency comprising button SW, if for example can in one second, press by this main control chip 20 this button of definition SW and once then carry out keypress function one, carry out keypress function two if this button SW pressed twice in one second.This function can the keypress function such as restart by corresponding being defined as of this main control chip 20, and is carried out by this main control chip 20.
When in this electronic installation course of normal operation, this button SW continues to press the afterwards relieving above a second, the one GPIO pin P1 of this main control chip 20 detects low level after high level surpasses one second detecting continuously, the system delay certain hour is such as time-delay in the present embodiment one to two second, behind this capacitor C 1 discharge off, trigger the 2nd GPIO pin P2 output low level, the base stage of this second triode Q2 is low level, this second triode Q2 by, its collector electrode is high-impedance state.The grid of this field effect transistor M1 is high level, this field effect transistor M1 cut-off, and its drain electrode no current output, thus make this electronic installation finish the action of shutdown.
On/off circuit 10 of the present utility model is electrically connected with main control chip 20, electronic apparatus system power Vcc and load 30 respectively, and this on/off circuit 10 comprises a contact button SW.This main control chip 20 is detected compressing time and the compression frequency of this button SW by its GPIO pin P1, and by its 2nd GPIO pin P2 output control level to control the break-make of this on/off circuit 10, to realize the switching on and shutting down of this electronic installation.When this electronic installation work, this main control chip 20 is detected the mode of pressing and the compression frequency of this button SW by its GPIO pin P1.When pressing in a different manner respectively this button SW according to the definition of main control chip 20, can realize accordingly different keypress functions.On/off circuit 10 of the present utility model only just can be realized multiple different function by a contact button SW, has saved cost, has simplified the structure of this electronic installation.
Above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the spirit and scope of technical solutions of the utility model.
Claims (8)
1. on/off circuit, be applied in the electronic installation, this on/off circuit is electrically connected to respectively the power supply of electronic installation, main control chip and load, this on/off circuit comprises button, this main control chip comprises the first pin and the second pin, it is characterized in that: described button is electrically connected to respectively the first pin of this power supply and this main control chip, this on/off circuit also comprises the first triode, the second triode and field effect transistor, the base stage of this first triode is connected to this button, collector electrode is connected to the grid of this field effect transistor, the base stage of this second triode is connected to the second pin of this main control chip, collector electrode is connected to the grid of this field effect transistor, the source electrode of this field effect transistor is connected to this power supply, drain electrode is connected to load, the first pin of this main control chip is detected time and the frequency that this button is pressed, after button is pressed, the first triode conducting, the field effect transistor conducting, when connecting, presses above Preset Time button, the second pin output control level of main control chip makes this second triode conducting, field effect transistor continues conducting, and drain electrode continues to output current to load, to finish the electronic installation start; In the electronic installation operating state, the compression frequency of main control chip the first pin detecting button in Preset Time, the different modes of corresponding pressing keys and realize respectively different keypress functions; This button is pressed above unclamping behind the Preset Time, and this main control chip first pin is detected corresponding level and changed, and triggers the second pin output control level and make the cut-off of the second triode, and the field effect transistor cut-off is to finish the electronic installation shutdown.
2. on/off circuit as claimed in claim 1, it is characterized in that: described on/off circuit also comprises some resistance, one end of this button is the first resistance and the second grounding through resistance by connecting successively, and successively by the series connection the 3rd resistance and the 4th grounding through resistance, the 3rd resistance one end is electrically connected between this button and the first resistance, and the other end is by the 4th grounding through resistance.
3. on/off circuit as claimed in claim 2, it is characterized in that: the base stage of described the first triode is electrically connected between the 3rd resistance and the 4th resistance by the 5th resistance, collector electrode is electrically connected to this power supply, grounded emitter by the 6th resistance and the 7th resistance successively.
4. on/off circuit as claimed in claim 3, it is characterized in that: the first pin of described main control chip is electrically connected between this first resistance and the second resistance, the second pin is electrically connected to the base stage of this second triode by the 8th resistance, the collector electrode of this second triode is electrically connected to the grid of this field effect transistor by the 9th resistance, the 5th resistance one end connects an electric capacity, this electric capacity other end ground connection.
5. on/off circuit as claimed in claim 4, it is characterized in that: described main control chip is CPU (CPU), and this first pin and the second pin are the universal input output pin, this first triode and the second triode are NPN type triode.
6. on/off circuit as claimed in claim 5, it is characterized in that: connect when described button is pressed, the base stage of this first triode is high level, this the first triode conducting, its collector electrode is low resistance state, the grid of this field effect transistor is low level, this field effect transistor conducting, its drain electrode outputs current to this load, the first pin of this main control chip detects high level, decontrol after this button is pressed above the default time, the first pin of this main control chip continues to detect high level above behind the Preset Time, triggers the base stage that the second pin continues output high level to the second triode, this the second triode conducting, collector electrode is low resistance state, and the grid of this field effect transistor is continuously low level, continues conducting to keep this field effect transistor.
7. on/off circuit as claimed in claim 6, it is characterized in that: described electronic installation is when normal operating conditions, press this button and surpass predetermined time, the first pin of this main control chip continues to detect high level and surpasses predetermined time, triggers this second pin output low level to the base stage of this second triode, this second triode by, collector electrode is high-impedance state, the grid of this field effect transistor is high level, and this field effect transistor is by, drain electrode no current output.
8. electronic installation, comprise on/off circuit, the power supply of the electronic installation that is electrically connected with this on/off circuit respectively, main control chip and load, this on/off circuit comprises button, it is characterized in that: described main control chip comprises the first pin and the second pin, this button is electrically connected to respectively the first pin of this power supply and this main control chip, this on/off circuit also comprises the first triode, the second triode and field effect transistor, the base stage of this first triode is connected to this button, collector electrode is connected to the grid of this field effect transistor, the base stage of this second triode is connected to the second pin of this main control chip, collector electrode is connected to the grid of this field effect transistor, the source electrode of this field effect transistor is connected to this power supply, drain electrode is connected to load, the first pin of this main control chip is detected time and the frequency that this button is pressed, after button is pressed, the first triode conducting, the field effect transistor conducting, when connecting, presses above Preset Time button, the second pin output control level of main control chip makes this second triode conducting, field effect transistor continues conducting, drain electrode continues to output current to load, to finish the electronic installation start; In the electronic installation operating state, the compression frequency of main control chip the first pin detecting button in Preset Time, the different modes of corresponding pressing keys and realize respectively different keypress functions; This button is pressed above unclamping behind the Preset Time, and this main control chip first pin is detected corresponding level and changed, and triggers the second pin output control level and make the cut-off of the second triode, and the field effect transistor cut-off is to finish the electronic installation shutdown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220267617 CN202841089U (en) | 2012-06-08 | 2012-06-08 | Power on-off circuit and electronic device having power on-off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220267617 CN202841089U (en) | 2012-06-08 | 2012-06-08 | Power on-off circuit and electronic device having power on-off circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202841089U true CN202841089U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220267617 Expired - Fee Related CN202841089U (en) | 2012-06-08 | 2012-06-08 | Power on-off circuit and electronic device having power on-off circuit |
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| CN (1) | CN202841089U (en) |
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| CN103713724A (en) * | 2013-12-20 | 2014-04-09 | 青岛歌尔声学科技有限公司 | Outage starting circuit with battery equipment and control method |
| CN104062915A (en) * | 2014-06-04 | 2014-09-24 | 广州中海达卫星导航技术股份有限公司 | On-off control method for GNSS (Global Navigation Satellite System) receiver |
| CN104731680A (en) * | 2013-12-24 | 2015-06-24 | 鸿富锦精密工业(武汉)有限公司 | Startup and shutdown testing circuit |
| CN105094015A (en) * | 2015-07-31 | 2015-11-25 | 深圳市大疆创新科技有限公司 | Control circuit, control method, and shooting device using the control circuit |
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| CN104731680A (en) * | 2013-12-24 | 2015-06-24 | 鸿富锦精密工业(武汉)有限公司 | Startup and shutdown testing circuit |
| CN104062915A (en) * | 2014-06-04 | 2014-09-24 | 广州中海达卫星导航技术股份有限公司 | On-off control method for GNSS (Global Navigation Satellite System) receiver |
| CN104062915B (en) * | 2014-06-04 | 2016-11-30 | 广州中海达卫星导航技术股份有限公司 | A kind of GNSS receiver on-off control method |
| CN106292341B (en) * | 2015-05-14 | 2019-01-04 | 深圳市三诺数字科技有限公司 | A kind of power on/off system and method |
| CN106292341A (en) * | 2015-05-14 | 2017-01-04 | 深圳市三诺数字科技有限公司 | A kind of power on/off system and method |
| CN106292985A (en) * | 2015-05-28 | 2017-01-04 | 比亚迪股份有限公司 | The on/off circuit of Bluetooth electronic devices and Bluetooth electronic devices |
| CN105094015B (en) * | 2015-07-31 | 2021-01-22 | 深圳市大疆灵眸科技有限公司 | Control circuit, control method and shooting equipment |
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| CN107544932B (en) * | 2016-06-28 | 2019-11-22 | 鸿富锦精密电子(天津)有限公司 | The electronic device of ON-OFF control circuit and the application ON-OFF control circuit |
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| CN113534690A (en) * | 2020-04-14 | 2021-10-22 | Tcl新技术（惠州）有限公司 | Intelligent device, starting control circuit and control method thereof |
| CN112737558A (en) * | 2020-12-14 | 2021-04-30 | 复旦大学 | Multifunctional key switch circuit for electronic product |
| CN112737558B (en) * | 2020-12-14 | 2024-05-24 | 复旦大学 | Multifunctional key switch circuit for electronic product |
| CN112783559A (en) * | 2020-12-30 | 2021-05-11 | 广州朗国电子科技有限公司 | Control circuit and method based on USB-C awakening all-in-one machine and all-in-one machine |
| CN112783559B (en) * | 2020-12-30 | 2021-11-05 | 广州朗国电子科技有限公司 | Control circuit and method based on USB-C awakening all-in-one machine and all-in-one machine |
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