CN207490889U - Reset circuit and electronic equipment - Google Patents
Reset circuit and electronic equipment Download PDFInfo
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- CN207490889U CN207490889U CN201721784864.2U CN201721784864U CN207490889U CN 207490889 U CN207490889 U CN 207490889U CN 201721784864 U CN201721784864 U CN 201721784864U CN 207490889 U CN207490889 U CN 207490889U
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- key switch
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- test side
- reset
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Abstract
The utility model discloses a kind of reset circuit and electronic equipment, and wherein reset circuit includes the first key switch, the second key switch and level switching circuit；Wherein level switching circuit includes the first test side, the second test side and reset terminal；When first key switch is closed and the second key switch disconnects, the first test side exports the first level, and reset terminal exports the first level；When second key switch is closed and the first key switch disconnects, the second test side exports the first level, and reset terminal exports the first level；When first key switch and the second key switch are closed at, reset terminal output second electrical level, controller is resetted.Technical solutions of the utility model are triggered by having the combination of button, realize the function of system reset.
Description
Technical field
The utility model is related to a kind of reset circuit and electronic equipments.
Background technology
Some current electronic equipments, when system needs to restart, it usually needs on one hardware of design dedicated for
The button of reset.Special one button for reset of setting so that device structure design complicates, cost raising.
Utility model content
The main purpose of the utility model is to provide a kind of reset circuit, it is intended to it is triggered by having the combination of button, it is real
The function of existing system reset.
To achieve the above object, the utility model proposes reset circuit include the first key switch, the second key switch
And level switching circuit；Wherein level switching circuit includes the first test side, the second test side and reset terminal；
When first key switch is closed and second key switch disconnects, first electricity of the first test side output
Flat, the reset terminal exports the first level；When second key switch is closed and first key switch disconnects, described the
Two test sides export the first level, and the reset terminal exports the first level；
When first key switch and second key switch are closed at, the reset terminal exports second electrical level,
Controller is resetted.
Preferably, the first end of first key switch is connect with auxiliary electric power supply, first key switch
Second end is connect with the first test side；The first end of the level switching circuit and the second end of first key switch connect
It connects；
The first end of second key switch is connect with auxiliary electric power supply, the second end of second key switch with
Second test side connects, and the second end of the level switching circuit is connect with the second end of the second key switch；
The reset terminal of the level switching circuit is connect with controller, first test side and the second test side with control
Device connection processed.
Preferably, the level switching circuit includes partial pressure isolation circuit, detection circuit and output circuit；It is described partial pressure every
It is connect respectively with first test side, the second test side and detection circuit from circuit, the detection circuit and the output electricity
Road connects, and the output circuit is connect with controller.
Preferably, the partial pressure isolation circuit includes first resistor, the first diode and second resistance；The first resistor
First end connect with first test side, the second end of the first resistor is connect with the anode of the first diode,
The cathode of one diode is connect with the first end of the second resistance, the second end ground connection of second resistance；The first of second resistance
End is also connect with second test side；The second end of the first resistor is also connect with the detection circuit.
Preferably, detection circuit includes 3rd resistor and the 4th resistance；The first end of the 3rd resistor and the partial pressure
Isolation circuit connects, and the second end of the 3rd resistor is connect with the 4th resistance first end, and the second of the 4th resistance
End ground connection；The first end of 4th resistance is also connect with the output circuit.
Preferably, the output circuit includes the 5th resistance and the first triode；The first end of 5th resistance with it is auxiliary
Power supply is helped to connect, the second end of the 5th resistance is connect with the collector of first triode, the one or three pole
The emitter ground connection of pipe, first transistor base are connect with the detection circuit；The collector of first triode is also
It is connect with controller.
Preferably, first triode is NPN type triode.
The utility model also proposes a kind of electronic equipment, and the electronic equipment includes reset circuit as described above；It resets
Circuit includes the first key switch, the second key switch and level switching circuit；Wherein level switching circuit includes the first detection
End, the second test side and reset terminal；When first key switch is closed and second key switch disconnects, first inspection
It surveys end and exports the first level, the reset terminal exports second electrical level；Second key switch is closed and first button is opened
When shutdown is opened, second test side exports the first level, and the reset terminal exports second electrical level；First key switch and
When second key switch is closed at, the reset terminal exports the first level, and controller is resetted.
Technical solutions of the utility model are by setting the first key switch, the second key switch and level switching circuit, shape
Into a kind of reset circuit.When being individually closed the first key switch or the second key switch, controller will not be resetted,
It ensure that the realization of original key switch function；When being closed at the first key switch or the second key switch, controller
It is resetted, thus on the basis of original key switch, realizes system reset function, technical solutions of the utility model are not
With special one button for reset of setting so that device structure design simplifies, and reduces cost.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to the structure shown in these attached drawings.
Fig. 1 is the functional block diagram of one embodiment of the utility model reset circuit；
Fig. 2 is the electrical block diagram of one embodiment of the utility model reset circuit.
Drawing reference numeral explanation：
| Label | Title | Label | Title |
| 100 | Level switching circuit | SW2 | Second key switch |
| 110 | Divide isolation circuit | R1~R5 | First resistor is to the 5th resistance |
| 120 | Detection circuit | D1 | First diode |
| 130 | Output circuit | Q1 | First triode |
| SW1 | First key switch | VCC | Auxiliary electric power supply |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that described embodiment is only the part of the embodiment rather than whole of the utility model
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute in the utility model embodiment
It is only used for explaining relative position relation, motion conditions under a certain particular pose (as shown in drawings) between each component etc., such as
When the fruit particular pose changes, then directionality instruction also correspondingly changes correspondingly.
In addition, the description in " first ", " second " etc. involved in the utility model is only used for description purpose, without being understood that
To indicate or implying its relative importance or the implicit quantity for indicating indicated technical characteristic.Define as a result, " first ",
At least one this feature can be expressed or be implicitly included to the feature of " second ".In addition, the technical side between each embodiment
Case can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical solution
Occur it is conflicting or when can not realize should people think that the combination of this technical solution is not present, also will in the utility model
Within the protection domain asked.
The utility model proposes a kind of reset circuits.
Referring to FIG. 1 and FIG. 2, in the utility model embodiment, which includes the first key switch SW1, second
Key switch SW2 and level switching circuit 100；Wherein level switching circuit 100 includes the first test side SW1-detect, second
Test side SW2-detect and reset terminal Reset.
When the first key switch SW1 is closed and the second key switch SW2 is disconnected, the first test side SW1-
Detect exports the first level, and the reset terminal Reset exports the first level；The second key switch SW2 is closed and described
When first key switch SW1 is disconnected, the second test side SW2-detect exports the first level, and the reset terminal Reset is defeated
Go out the first level；
When the first key switch SW1 and the second key switch SW2 are closed at, the reset terminal Reset is defeated
Go out second electrical level, controller is resetted.
First key switch SW1 and the second key switch SW2 is the key switch of equipment in itself, by the first button
Switch SW1 and the second key switch SW2 is multiplexed, and realizes a kind of reset circuit.
In the present embodiment, the first level is high level, and second electrical level is low level.It should be noted that high level and low
During level in contrast, for example, high level can be 3.3V, low level can be 0V.Controller is to the first key switch SW1
It is just effective when only level is high level with the detection of the second key switch SW2, when voltage is less than high level, the letter of detection
It is number invalid.And detection of the controller to reset signal, then it is that low level signal is effective, and resetted in low level.
Technical solutions of the utility model are by setting the first key switch SW1, the second key switch SW2 and level to switch electricity
Road 100 forms a kind of reset circuit.When being individually closed the first key switch SW1 or the second key switch SW2, control
Device will not be resetted, it ensure that the realization of original key switch function；When being closed at the first key switch SW1 or second
During key switch SW2, controller is resetted, thus on the basis of original key switch, realizes system reset function,
Technical solutions of the utility model do not have to special one button for reset of setting so that device structure design simplifies, and reduces
Cost.
Specifically, the first end of the first key switch SW1 is connect with auxiliary electric power supply VCC, first button
The second end of switch SW1 is connect with the first test side SW1-detect；The first end of the level switching circuit 100 and described the
The second end connection of one key switch SW1；
The first end of the second key switch SW2 is connect with auxiliary electric power supply VCC, the second key switch SW2
Second end connect with the second test side SW2-detect, the second end of the level switching circuit 100 and the second key switch
The second end connection of SW2；
The reset terminal Reset of the level switching circuit 100 is connect with controller (not shown), first test side
SW1-detect and the second test side SW2-detect are connect with controller.
Specifically, the level switching circuit 100 includes partial pressure isolation circuit 110, detection circuit 120 and output circuit
130；It is described partial pressure isolation circuit 110 respectively with the first test side SW1-detect, the second test side SW2-detect and
Detection circuit 120 connects, and the detection circuit 120 is connect with the output circuit 130, the output circuit 130 and controller
Connection.
What deserves to be explained is the effect of partial pressure isolation circuit 110 is, when the first key switch SW1 is individually closed, only
High level is exported in the first test side SW1-detect, and smaller voltage is exported in the second test side SW2-detect；And
When second button is individually closed, high level only is exported in the second test side SW2-detect, and in the first test side SW1-
Detect exports smaller voltage.The effect of partial pressure isolation circuit 110 also resides in, when the first key switch SW1 or the second button
When switch SW2 is individually closed, after partial pressure is isolated, exported after the voltage of the first level is reduced to 120 circuit of detection circuit.
The effect of detection circuit 120 is, according to the voltage that partial pressure isolation circuit 110 exports, judges the first key switch
Whether SW1 and the second key switch SW2 are closed at, and when pressing at the same time, output control signals to output circuit 130.
The effect of output circuit 130 is, according to control signal, exports the first level or second electrical level to controller.Control
Device processed is resetted when output level is low level.
With reference to Fig. 2, specifically, the partial pressure isolation circuit 110 includes first resistor R1, the first diode D1 and the second electricity
Hinder R2；The first end of the first resistor R1 is connect with the first test side SW1-detect, and the of the first resistor R1
Two ends are connect with the anode of the first diode D1, and the cathode of the first diode D1 and the first end of the second resistance R2 connect
It connects, the second end ground connection of second resistance R2；The first end of second resistance R2 is also connect with the second test side SW2-detect；
The second end of the first resistor R1 is also connect with the detection circuit 120.
Specifically, detection circuit 120 includes 3rd resistor R3 and the 4th resistance R3；The first end of the 3rd resistor R3
It is connect with the partial pressure isolation circuit 110, the second end of the 3rd resistor R3 is connect with the 4th resistance R3 first ends, institute
State the second end ground connection of the 4th resistance R3；The first end of 4th resistance R3 is also connect with the output circuit 130.
Specifically, the output circuit 130 includes the 5th resistance R5 and the first triode Q1；The of the 5th resistance R5
One end is connect with auxiliary electric power supply VCC, and the second end of the 5th resistance R5 and the collector of the first triode Q1 connect
It connects, the emitter ground connection of the first triode Q1, the first triode Q1 base stages are connect with the detection circuit 120；Institute
The collector for stating the first triode Q1 is also connect with controller.
In the present embodiment, the first triode Q1 is NPN type triode.
Physical circuit figure is first combined, technical solutions of the utility model are further elaborated：
In one embodiment, it be the resistance value of 1K Ω, R3 is the resistance value of 10K Ω, R4 that the resistance value of R1, which is the resistance value of 20K Ω, R2,
For 10K Ω, the resistance value of R5 is 10K Ω, the model LL4148 of the first diode D1.Auxiliary electric power supply VCC is 3.3V direct currents
Source, the model BT3904 of the first triode Q1.
When SW1 is pressed, SW1_detect detects high level, and controller recognizes SW1 and presses；SW2-detect voltages are
0.1V is low level (SW2 will not be triggered)；The anode of D1 is 0.7V, then the base stage of Q1 is 0.35V, and Q1 is not turned on, Reset letters
Number for high level, will not trigger controller reset.
When SW2 is pressed, SW2_detect detects high level, and controller recognizes SW2 and presses；D1 reversely ends, SW1_
Detect is 0V, and the base stage of Q1 is 0V, and Reset signals are high level, will not trigger controller reset.
When button SW1, SW2 are pressed, D1 reversely ends, and the base voltage of Q1 is 0.82V, and Q1 is connected, and Reset is defeated
Go out low level, controller resets, and whole system resets.
The utility model also proposes a kind of electronic equipment, which includes above-mentioned reset circuit, the reset circuit
Concrete structure reference above-described embodiment, since this electronic equipment employs whole technical solutions of above-mentioned all embodiments,
All advantageous effects at least caused by the technical solution with above-described embodiment, this is no longer going to repeat them.
The above is only the preferred embodiment of the present invention, and it does not limit the scope of the patent of the present invention,
It is every under the inventive concept of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes or directly/is used in other related technical areas indirectly and is included in the scope of patent protection of the utility model.
Claims (8)
1. a kind of reset circuit, which is characterized in that the reset circuit includes the first key switch, the second key switch and level
Switching circuit；Wherein level switching circuit includes the first test side, the second test side and reset terminal；
When first key switch is closed and second key switch disconnects, first test side exports the first level,
The reset terminal exports the first level；When second key switch is closed and first key switch disconnects, described second
Test side exports the first level, and the reset terminal exports the first level；
When first key switch and second key switch are closed at, the reset terminal exports second electrical level, control
Device is resetted.
2. reset circuit as described in claim 1, which is characterized in that the first end and auxiliary power supply of first key switch
Power supply connects, and the second end of first key switch is connect with the first test side；The first end of the level switching circuit with
The second end connection of first key switch；
The first end of second key switch is connect with auxiliary electric power supply, the second end and second of second key switch
Test side connects, and the second end of the level switching circuit is connect with the second end of the second key switch；
The reset terminal of the level switching circuit is connect with controller, and first test side and the second test side are and controller
Connection.
3. reset circuit as claimed in claim 2, which is characterized in that the level switching circuit include partial pressure isolation circuit,
Detection circuit and output circuit；It is described partial pressure isolation circuit respectively with first test side, the second test side and detection circuit
Connection, the detection circuit are connect with the output circuit, and the output circuit is connect with controller.
4. reset circuit as claimed in claim 3, which is characterized in that the partial pressure isolation circuit includes first resistor, first
Diode and second resistance；The first end of the first resistor is connect with first test side, and the second of the first resistor
End is connect with the anode of the first diode, and the cathode of the first diode is connect with the first end of the second resistance, second resistance
Second end ground connection；The first end of second resistance is also connect with second test side；The second end of the first resistor also with
The detection circuit connection.
5. reset circuit as claimed in claim 3, which is characterized in that detection circuit includes 3rd resistor and the 4th resistance；Institute
It states the first end of 3rd resistor connect with the partial pressure isolation circuit, the second end of the 3rd resistor and the 4th resistance the
One end connects, the second end ground connection of the 4th resistance；The first end of 4th resistance is also connect with the output circuit.
6. reset circuit as claimed in claim 3, which is characterized in that the output circuit includes the 5th resistance and the one or three pole
Pipe；The first end of 5th resistance is connect with auxiliary electric power supply, second end and the one or three pole of the 5th resistance
The collector connection of pipe, the emitter ground connection of first triode, first transistor base connect with the detection circuit
It connects；The collector of first triode is also connect with controller.
7. reset circuit as claimed in claim 6, which is characterized in that first triode is NPN type triode.
8. a kind of electronic equipment, which is characterized in that the electronic equipment includes as claimed in any of claims 1 to 7 in one of claims
Reset circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721784864.2U CN207490889U (en) | 2017-12-18 | 2017-12-18 | Reset circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721784864.2U CN207490889U (en) | 2017-12-18 | 2017-12-18 | Reset circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207490889U true CN207490889U (en) | 2018-06-12 |
Family
ID=62458739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721784864.2U Active CN207490889U (en) | 2017-12-18 | 2017-12-18 | Reset circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207490889U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034752A (en) * | 2019-05-05 | 2019-07-19 | 厦门美图之家科技有限公司 | Face cleaning instrument and face cleaning instrument control method |
-
2017
- 2017-12-18 CN CN201721784864.2U patent/CN207490889U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034752A (en) * | 2019-05-05 | 2019-07-19 | 厦门美图之家科技有限公司 | Face cleaning instrument and face cleaning instrument control method |
| CN110034752B (en) * | 2019-05-05 | 2023-06-13 | 厦门美图之家科技有限公司 | Face cleaner and face cleaner control method |
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| GR01 | Patent grant |