CN202475388U - Automotive power-off reset switch circuit - Google Patents
Automotive power-off reset switch circuit Download PDFInfo
- Publication number
- CN202475388U CN202475388U CN201220073073XU CN201220073073U CN202475388U CN 202475388 U CN202475388 U CN 202475388U CN 201220073073X U CN201220073073X U CN 201220073073XU CN 201220073073 U CN201220073073 U CN 201220073073U CN 202475388 U CN202475388 U CN 202475388U
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Abstract
The utility model aims to provide an automotive power-off reset switch circuit which is used for controlling automotive electronic equipment such as rear fog lamps. The automotive power-off reset switch circuit comprises a D trigger, an output end of the D trigger is connected with a positive pole of a diode, a negative pole of the diode is grounded through a first resistor and is further connected with a D input end of the D trigger, a clock input end of the D trigger is connected with a power supply through a microswitch and is grounded through a second resistor, the output end of the D trigger is connected with a base of a switch triode through a non-gate circuit, an emitter of the switch triode is grounded, and a collector of the switch triode is connected with a control end of a relay. The automotive power-off reset switch circuit is novel in design and has a power-off self-reset function, the use of automotive electric equipment is ensured to meet the requirements of relevant laws and regulations, and the automotive power-off reset switch circuit is simple in structural principle and easy to implement.
Description
Technical field
The utility model belongs to car electrics switch control field, specially refers to a kind of automobile power-down reseting switch circuit.
Background technology
Because automobile international development demand is considered based on aspects such as laws and regulations requirement and car load comfortablenesses, requires electric device (for example Rear Fog Lamp and sound equipment etc.) to possess outage from reset function, promptly need press control switch once more after the outage and could open electrical appliance.To this problem, most of at present through mechanical structure or car body controller control completion, cost is high, and breaks down easily.
Summary of the invention
The purpose of the utility model is to propose a kind of automobile power-down reseting switch circuit, to be used for the control of vehicle electronics such as Rear Fog Lamp.
The automobile power-down reseting switch circuit of the utility model comprises a d type flip flop;
output of said d type flip flop links to each other with the positive pole of a diode; The negative pole of said diode is through one first grounding through resistance, and the negative pole of said diode also links to each other with the D input of said d type flip flop; The input end of clock of said d type flip flop links to each other with power supply through a sensitive switch, and the input end of clock of d type flip flop is also through one second grounding through resistance;
output of said d type flip flop links to each other with the base stage of a switch triode through a not circuit; The grounded emitter of said switch triode, the collector electrode of switch triode links to each other with the control end of a relay.
In use; After d type flip flop powered on, when sensitive switch was not pressed, the input end of clock of d type flip flop was through second grounding through resistance; Therefore remain low level state; This moment, the D input of d type flip flop passed through first grounding through resistance, was low level also therefore, thereby made
output of d type flip flop keep the output high level signal; This high level signal becomes low level signal after through not circuit and inputs to the base stage of switch triode; Make switch triode be in off-state, i.e. the current collection of switch triode vacant state very, this moment, relay broke off; Pressing sensitive switch can make the input end of clock of d type flip flop be communicated with power supply is of short duration; The input end of clock that is d type flip flop obtains a rising edge; Principle according to d type flip flop; This moment,
output of d type flip flop can be followed the level of the D input of d type flip flop; It is
output meeting output low level signal of d type flip flop; This low level signal becomes high level signal after through not circuit and inputs to the base stage of switch triode; Make switch triode be in conducting state; The current potential that is the collector electrode of switch triode is dragged down, relay adhesive this moment; In addition; Behind
output output low level signal of d type flip flop; Its
output can be exported high level signal; Through diode the D input is drawn high and to be high level; The current potential with
output is opposite always to make the current potential of D input, thus the current potential of
output that guarantees can to overturn when sensitive switch is pressed next time.When d type flip flop cuts off the power supply, can automatically reset, thereby realize automatically reseting of switching circuit.
Further; For reducing cost; Said not circuit preferably adopts discrete device to build; Specific as follows: said not circuit is made up of an auxiliary triode, and the base stage of said auxiliary triode links to each other with
output of said d type flip flop, the grounded emitter of auxiliary triode; Collector electrode links to each other with power supply through pull-up resistor, and the collector electrode of said auxiliary triode links to each other with the base stage of said switch triode.
Further, the collector electrode of said auxiliary triode links to each other with the base stage of said switch triode through a biasing resistor, and is accurate with the assurance current potential, thereby guarantees the control to switch triode.
Further;
output of said d type flip flop links to each other with the base stage of auxiliary triode through a current-limiting resistance, meets the requirements to guarantee electric current.
The automobile power-down reseting switch circuit of the utility model is novel in design, and the outage that can solve self guarantee that the use of car electrics meets relevant laws and regulations requirement requirement, and structural principle is simple, is easy to realize from reset function.
Description of drawings
Fig. 1 is the schematic diagram of the automobile power-down reseting switch circuit of the utility model.
Embodiment
Contrast accompanying drawing below; Through description, the effect of the mutual alignment between the shape of the embodiment of the utility model such as related each member, structure, the each several part and annexation, each several part and operation principle etc. are done further to specify to embodiment.
Embodiment 1:
The example that is controlled to be with Rear Fog Lamp; As shown in Figure 1; The automobile power-down reseting switch circuit of present embodiment comprises a d type flip flop U1; The 8th, the 10 pin ground connection of d type flip flop U1;
output (i.e. 12 pin) of d type flip flop U1 links to each other with the positive pole of a diode D1, and the negative pole of diode D1 is through one first resistance R 1 ground connection, and the negative pole of diode D1 also links to each other with the D input (i.e. 9 pin) of d type flip flop U1; The input end of clock of d type flip flop U1 (i.e. 11 pin) links to each other with power supply through a sensitive switch S1, and the input end of clock of d type flip flop U1 is also through one second resistance R 2 ground connection;
output (i.e. 13 pin) of d type flip flop U1 links to each other with the base stage of an auxiliary triode Q1 through a current-limiting resistance R3; The grounded emitter of auxiliary triode Q1; Collector electrode links to each other with power supply through pull-up resistor R4; The collector electrode of auxiliary triode Q1 links to each other with the base stage of a switch triode Q2 through a biasing resistor R5; The grounded emitter of switch triode Q2; The collector electrode of switch triode Q2 links to each other with the control end of a relay U2, and Rear Fog Lamp LED1 links to each other with the input of this relay U2.
In use; After d type flip flop U1 powered on, when sensitive switch S1 did not press, the input end of clock of d type flip flop U1 was through second resistance R, 2 ground connection; Therefore remain low level state; This moment, the D input of d type flip flop U1 passed through first resistance R, 1 ground connection, was low level also therefore, thereby made
output of d type flip flop U1 keep the output high level signal; Become low level signal behind the not circuit that this high level signal is built through auxiliary triode Q1 and input to the base stage of switch triode Q2; Make switch triode Q2 be in off-state, i.e. the current collection of switch triode Q2 vacant state very, this moment, relay U2 broke off; Rear Fog Lamp LED1 can not get the power supply supply, therefore is in closed condition; Pressing sensitive switch S1 can make the input end of clock of d type flip flop U1 be communicated with power supply is of short duration; The input end of clock that is d type flip flop U1 obtains a rising edge; Principle according to d type flip flop; This moment,
output of d type flip flop U1 can be followed the level of the D input of d type flip flop U1; It is
output meeting output low level signal of d type flip flop U1; Become high level signal behind the not circuit that this low level signal is built through auxiliary triode Q1 and input to the base stage of switch triode Q2; Make switch triode Q2 be in conducting state, promptly the current potential of the collector electrode of switch triode Q2 is dragged down, relay U2 adhesive this moment; Rear Fog Lamp LED1 is communicated with power supply, and is therefore in running order; In addition; Behind
output output low level signal of d type flip flop U1; Its
output can be exported high level signal; Through diode D1 the D input is drawn high and to be high level; The current potential with
output is opposite always to make the current potential of D input; Thereby the current potential of
output that guarantees can to overturn when sensitive switch S1 presses next time promptly changes the state of Rear Fog Lamp LED1.
When d type flip flop U1 cuts off the power supply, can automatically reset, thereby realize automatically reseting of switching circuit.
Claims (4)
1. automobile power-down reseting switch circuit; It is characterized in that comprising a d type flip flop;
output of said d type flip flop links to each other with the positive pole of a diode; The negative pole of said diode is through one first grounding through resistance, and the negative pole of said diode also links to each other with the D input of said d type flip flop; The input end of clock of said d type flip flop links to each other with power supply through a switch, and the input end of clock of d type flip flop is also through one second grounding through resistance;
output of said d type flip flop links to each other with the base stage of a switch triode through a not circuit; The grounded emitter of said switch triode, the collector electrode of switch triode links to each other with the control end of a relay.
2. automobile power-down reseting switch circuit according to claim 1; It is characterized in that said not circuit is made up of an auxiliary triode; The base stage of said auxiliary triode links to each other with
output of said d type flip flop; The grounded emitter of auxiliary triode; Collector electrode links to each other with power supply through pull-up resistor, and the collector electrode of said auxiliary triode links to each other with the base stage of said switch triode.
3. automobile power-down reseting switch circuit according to claim 2 is characterized in that the collector electrode of said auxiliary triode links to each other with the base stage of said switch triode through a biasing resistor.
4. according to claim 2 or 3 described automobile power-down reseting switch circuits, it is characterized in that
output of said d type flip flop links to each other with the base stage of auxiliary triode through a current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220073073XU CN202475388U (en) | 2012-03-01 | 2012-03-01 | Automotive power-off reset switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220073073XU CN202475388U (en) | 2012-03-01 | 2012-03-01 | Automotive power-off reset switch circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202475388U true CN202475388U (en) | 2012-10-03 |
Family
ID=46923510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220073073XU Expired - Lifetime CN202475388U (en) | 2012-03-01 | 2012-03-01 | Automotive power-off reset switch circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202475388U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103568994A (en) * | 2013-11-15 | 2014-02-12 | 柳州铁道职业技术学院 | Smooth-voltage-stabilization automobile circuit protection device |
| CN103587482A (en) * | 2013-11-15 | 2014-02-19 | 柳州铁道职业技术学院 | Automobile integrated circuit protector capable of stabilizing voltage smoothly |
| CN111200425A (en) * | 2020-01-23 | 2020-05-26 | 华为技术有限公司 | Reset circuit and related electronic equipment |
-
2012
- 2012-03-01 CN CN201220073073XU patent/CN202475388U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103568994A (en) * | 2013-11-15 | 2014-02-12 | 柳州铁道职业技术学院 | Smooth-voltage-stabilization automobile circuit protection device |
| CN103587482A (en) * | 2013-11-15 | 2014-02-19 | 柳州铁道职业技术学院 | Automobile integrated circuit protector capable of stabilizing voltage smoothly |
| CN103568994B (en) * | 2013-11-15 | 2016-05-04 | 柳州铁道职业技术学院 | The circuit protective device that a kind of voltage stabilizing is smooth-going |
| CN111200425A (en) * | 2020-01-23 | 2020-05-26 | 华为技术有限公司 | Reset circuit and related electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |