CN103428964A - Switching circuit with delay function - Google Patents
Switching circuit with delay function Download PDFInfo
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- CN103428964A CN103428964A CN201310273962XA CN201310273962A CN103428964A CN 103428964 A CN103428964 A CN 103428964A CN 201310273962X A CN201310273962X A CN 201310273962XA CN 201310273962 A CN201310273962 A CN 201310273962A CN 103428964 A CN103428964 A CN 103428964A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention discloses a switching circuit with a delay function. The switching circuit comprises a section switch unit, a normal switch for conducting normal control of turning on/off of the light for a lighting load, a delay turn-off unit and a delay control switch for starting or stopping a light turning off delaying function. The delay turn-off unit comprises a first alternating current (AC)-direct current (DC) power circuit, a delay circuit and a first relay controlled by the delay circuit. The delay circuit is composed of a time base integrated circuit and a first peripheral circuit. The delay turn-off unit has the light turning off delaying function of keeping the lighting load to be light after the normal switch is switched off and putting out the lighting load automatically after set light time, so that a period of time of lighting can still be provided for users after the users turn off the light, and convenience is brought to life of the users. Delayed putting out time is adjustable and flexible. The section switch unit is used for conducting section control on the normal switch and the delay control switch, so that control is conducted through one power switch, the users can use the switching circuit conveniently.
Description
Technical field
The present invention relates to field of switch power, particularly a kind of switching circuit with delay light-off function.
Background technology
Every kind of light fixture all can deploy switch, control the bright spot of light fixture and extinguish by switch, lamp switch of a great variety, wherein the most common have key switch and pull down switch, and can, by pressing or pulling down switch to connect lamp power, light fixture be lighted, open the illumination functions of light fixture, by again pressing or pulling down switch to disconnect lamp power, light fixture is extinguished again, close the illumination functions of light fixture.In daily life, if the strange land control switch is not installed, do not have in the situation of other illumination yet, in dark environment, after turning off the light, just there is no light, can only feel about in the dark, bring a lot of inconvenience can to like this our life.
Therefore, how designing a kind of lamp switch circuit that can after turning off the light, still have the illumination functions of a period of time is technical problem urgently to be resolved hurrily in the industry.
Summary of the invention
Main purpose of the present invention is to provide a kind of switching circuit with delay feature, is intended to realize that the user is after turning off the light, and light fixture still can provide for the user illumination of a period of time, and in this period later light fixture automatic distinguishing, for user's life offers convenience.
The present invention proposes a kind of switching circuit with delay feature, comprise the normal switch for normally closed or deenergization that can be connected with lighting load, postpone to turn-off unit and turn-off with described delay that unit is connected for opening the delay control switch of delay feature; The first relay that unit comprises an AC-DC power circuit, delay circuit and controlled by described delay circuit is turn-offed in described delay, described delay circuit is comprised of time-base integrated circuit and the first peripheral circuit, described the first peripheral circuit comprises the first capacitor and the first current-limiting resistance, described the first current-limiting resistance and described the first capacitor's series, the positive pole of the output head anode of a described AC-DC power circuit and described the first capacitor is electrically connected, and the negative pole of the negative pole of output end of a described AC-DC power circuit and described the first current-limiting resistance is electrically connected; The pin of described time-base integrated circuit comprises positive source pin, power cathode pin, triggers input pin, output pin, reset terminal pin, control end pin, threshold values end pin and discharge end pin, the positive source pin of described time-base integrated circuit and reset terminal pin are electrically connected at the output head anode of a described AC-DC power circuit, and are electrically connected with the coil electrode of described the first relay; The power cathode pin of described time-base integrated circuit and control end pin are electrically connected at the negative pole of output end of a described AC-DC power circuit; The triggering input pin of described time-base integrated circuit and threshold values end pin are electrically connected between described the first capacitor and described the first current-limiting resistance, with the negative pole of described the first capacitor, are connected; The output pin of described time-base integrated circuit is connected with the coil negative pole of described the first relay, and the tip side of described the first relay is for being connected with lighting load.
Preferably, described delay is turn-offed unit and is also comprised a LED light of opening for the display delay function, the positive pole of described LED light is connected with the output head anode of a described AC-DC power circuit, the negative pole of described LED light is connected with the negative pole of output end of a described AC-DC power circuit, at positive pole series connection one second current-limiting resistance of described LED light.
Preferably, a described AC-DC power circuit is comprised of the first reduction voltage circuit, the first bridge rectifier and the first filter regulator circuit that are electrically connected successively.
Preferably, described the first peripheral circuit also comprises that first diode and that is used to described the first capacitor discharge is for jamming-proof the second capacitor, described the first diode and described the first capacitor's series, and in parallel with described the first current-limiting resistance; Described the second capacitor's series is at the control end pin of described time-base integrated circuit.
Preferably, described the first capacitor is electrolytic capacitor, and described the second capacitor is the ceramic disc capacitor device.
Preferably, one of the coil two ends of described the first relay parallel connected in reverse phase, can form the second diode of short time continuous current circuit with described the first relay, described the second diode can be switching diode, rectifier diode or fast recovery diode.
Preferably, described normal switch is the second relay, and described delay control switch is the 3rd relay, also comprises that one for controlling the block switch unit of described the second relay and described the 3rd relay.
Preferably, described block switch unit is TC2608 block switch unit, comprise mains switch, the 2nd AC-DC power circuit with described mains switch electrical connection, control IC and control the second peripheral circuit of IC collocation with described segmentation with the segmentation that is TC2608 of the model of the output of described the 2nd AC-DC power circuit electrical connection, the first output electrical connection of IC is controlled in the coil-end of described the second relay and described segmentation, the tip side of described the second relay can be connected with lighting load, the second output electrical connection of IC is controlled in the coil-end of described the 3rd relay and described segmentation, the tip side of described the 3rd relay is connected with the input of a described AC-DC power circuit.
Preferably, can form with described the second relay the 3rd diode of short time continuous current circuit one of the coil two ends of described the second relay parallel connected in reverse phase, can form the 4th diode of short time continuous current circuit with described the 3rd relay one of the coil two ends of described the 3rd relay parallel connected in reverse phase, described the 3rd diode and described the 4th diode can be made as switching diode, rectifier diode or fast recovery diode.
Switching circuit with delay feature of the present invention comprises normal switch, postpones to turn-off unit and delay control switch, and normal switch, for being connected with lighting load, carries out normal open and close lamp to lighting load and controls.Delay control switch is connected with the input that postpones the shutoff monolithic, and the delay control switch closure makes to postpone to turn-off monolithic and switches on power, thereby open, postpones to turn off the light function.Postponing to turn-off unit has after normal switch disconnects, make lighting load continue to light, and after the time of lighting of setting the delay of the automatic distinguishing lighting load function of turning off the light, can after the user turns off the light, continue as the illumination that the user provides a period of time, for user's life offers convenience.
Use while postponing to turn off the light function, normal switch disconnects, and closed delay control switch is connected AC power, and the DC power supply of 220V alternating current output smoothing after an AC-DC power circuit step-down, rectification, filtering, voltage stabilizing is supplied with delay circuit, the first capacitor is by the first current-limiting resistance charging, the first capacitor now is conductor, because the first capacitor voltage at both ends can not be suddenlyd change, so the threshold values end pin of time-base integrated circuit is high level, circuit is reset, its output pin output low level, be equivalent to connect the negative pole of the first relay, thereby the coil circuit of the first relay is connected, the armature of the first relay is by adhesive, moving contact and fixed contact adhesive, the circuit self-locking, thereby connection lighting load, lighting load is lit, lighting load continues luminous, for the user provides illumination, be user-friendly to.Along with the first capacitor continues charging, the first capacitor voltage at both ends raises gradually, the level of the triggering input pin of time-base integrated circuit can constantly descend, when drop to power supply 1/3 the time, circuit upset set, its output pin output high level, the output pin is positive voltage, thereby the coil circuit of the first relay is disconnected, the first relay electric-loss discharges, and self-locking is removed in the moving contact tripping, thereby lighting load is disconnected, lighting load automatic distinguishing, and lighting load and power supply disconnection, very safe.After lighting load disconnects, the electric energy of the first capacitor stores is released by internal resistance and first diode of time-base integrated circuit, for delay next time, turns off the light and prepares.
Postpone to turn-off unit and also comprise a LED light of opening for the display delay function, the positive pole of LED light is connected with the output head anode of an AC-DC power circuit, the negative pole of LED light is connected with the negative pole of output end of an AC-DC power circuit, positive pole series connection one second current-limiting resistance in LED light, at closed delay control switch, after switching on power, LED light is normally luminous through the second current-limiting resistance current limliting, open for the display delay function, inform that the user is using and postpone to turn off the light function.
LED light and the second current-limiting resistance and first Parallel-connected Capacitor of series connection, the amount of capacity that the delay fall time in the present invention can be by changing the first capacitor or the resistance size of the second current-limiting resistance realize.Strengthen the resistance of capacity or second current-limiting resistance of the first capacitor, postpone the fall time to lengthen, otherwise, reducing the capacity of the first capacitor or reduce the resistance of the second current-limiting resistance, shorten time of delay.
Also increased the block switch unit in the present invention, the block switch unit is used for normal switch and delay control switch are carried out to segmentation control, thereby can control by a mains switch, is user-friendly to.
The accompanying drawing explanation
Fig. 1 is the circuit theory diagrams with switching circuit of delay feature of the present invention;
The pin function contrast figure that Fig. 2 is the time-base integrated circuit in the switching circuit with delay feature of the present invention;
The pin function contrast figure of IC is controlled in the segmentation that Fig. 3 is the TC2608 in the switching circuit with delay feature of the present invention.
The realization of the object of the invention, functional characteristics and advantage, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 1, Fig. 2 and Fig. 3, an embodiment with switching circuit of delay feature of the present invention is proposed, this switching circuit with delay feature comprises the K3 of the normal switch for normally closed or deenergization that can be connected with lighting load, postpone to turn-off unit and with postpone to turn-off that unit is connected for opening the delay control switch K4 of delay feature.Normal switch K3, for being connected with lighting load, carries out normal open and close lamp to lighting load and controls.Delay control switch K4 is connected with the input that postpones the shutoff monolithic, and delay control switch K4 closure makes to postpone to turn-off monolithic and switches on power, thereby open, postpones to turn off the light function, otherwise, delay control switch K4 disconnects, and makes to postpone to turn-off monolithic and power supply disconnection, closes and postpones to turn off the light function.Postponing to turn-off unit has after normal switch K3 disconnects, make lighting load continue to light, and after the time of lighting of setting the delay of the automatic distinguishing lighting load function of turning off the light, can after the user turns off the light, continue as the illumination that the user provides a period of time, for user's life offers convenience.
Postpone to turn-off unit and comprise an AC-DC power circuit, delay circuit and be subject to the first relay K 2, the one AC-DC power circuits that delay circuit is controlled to be used for converting AC power to level and smooth direct current, for delay circuit provides DC power supply.The one AC-DC power circuit is comprised of the first reduction voltage circuit, the first bridge rectifier and the first filter regulator circuit that are electrically connected successively.The first reduction voltage circuit is for carrying out step-down by the High Level AC Voltage of input.The first reduction voltage circuit is comprised of the first decompression capacitor C1 and the first bleeder resistance R1, and the first decompression capacitor C1 can produce capacitive reactance under certain AC signal frequency, thereby the maximum operating currenbt of limited delay circuit is realized the current limliting step-down.The first decompression capacitor C1 is polypropylene capactive, and volume is little, economical, reliable, efficiency is high.The first bleeder resistance R1 is connected in parallel on the two ends of the first decompression capacitor C1, for giving the first decompression capacitor C1, provides the path of releasing, so that after the first decompression capacitor C1 quits work, and the electric energy of the first decompression capacitor C1 two ends storage of releasing.The input of the first bridge rectifier is connected with the output of the first reduction voltage circuit, and the first bridge rectifier is comprised of four rectifier diode D1, D2, D3 and D4, for the direct voltage that is unidirectional pulsation by AC voltage conversion.The first filter regulator circuit is comprised of an electrolytic capacitor C2 and a zener diode D5, this electrolytic capacitor C2 is connected with the output of the first bridge rectifier, alternating component for the unidirectional pulsating dc voltage after the filtering rectification, make it to become level and smooth direct voltage; This voltage stabilizing didoe D5 is connected in parallel on the two ends of this electrolytic capacitor C2, for voltage stabilizing.While postponing to turn-off cell operation, the High Level AC Voltage of input is exported to the first bridge rectifier after the first reduction voltage circuit step-down, carry out rectification by the first bridge rectifier, export the direct voltage of unidirectional pulsation, then be the direct voltage of delay circuit output smoothing after electrolytic capacitor C2 and zener diode D5 filtering, voltage stabilizing.
Delay circuit forms by time-base integrated circuit IC1 with the first peripheral circuit of time-base integrated circuit IC1 collocation, the first peripheral circuit comprises the first capacitor C3 and the first current-limiting resistance R3, the first current-limiting resistance R3 connects with the first capacitor C3, the positive pole of the output head anode of the one AC-DC power circuit and the first capacitor C3 is electrically connected, and the negative pole of the negative pole of output end of an AC-DC power circuit and the first current-limiting resistance R3 is electrically connected.Time-base integrated circuit IC1 is 555 time-base integrated circuit IC1, it comprises 8 pins, pin 1 is power cathode pin 1, pin 2 is for triggering input pin 2, and pin 3 is output pin 3, and pin 4 is reset terminal pin 4, pin 5 is control end pin 5, pin 6 is threshold values end pin 6, and pin 7 is discharge end pin 7, and pin 8 is positive source pin 8.The positive source pin 8 of time-base integrated circuit IC1 and reset terminal pin 4 are electrically connected at the output head anode of an AC-DC power circuit, and are electrically connected with the coil electrode of the first relay K 2; The power cathode pin 1 of time-base integrated circuit IC1 and control end pin 5 are electrically connected at the negative pole of output end of an AC-DC power circuit; The triggering input pin 2 of time-base integrated circuit IC1 and threshold values end pin 6 are electrically connected between the first capacitor C3 and the first current-limiting resistance R3, with the negative pole of the first capacitor C3, are connected; The output pin 3 of time-base integrated circuit IC1 is connected with the coil negative pole of the first relay K 2, and the tip side K2-1 of the first relay K 2 is for being connected with lighting load.
Use while postponing to turn off the light function, normal switch K3 disconnects, and closed delay control switch K4 connects AC power, and the DC power supply of 220V alternating current output smoothing after an AC-DC power circuit step-down, rectification, filtering, voltage stabilizing is supplied with delay circuit.The first capacitor C3 is by the first current-limiting resistance R3 charging, the first capacitor C3 now is conductor, because the first capacitor C3 both end voltage can not be suddenlyd change, so the threshold values end pin 6 of time-base integrated circuit IC1 is high level, circuit is reset, its output pin 3 output low levels, be equivalent to connect the negative pole of the first relay K 2, thereby the coil circuit of the first relay K 2 is connected, the armature of the first relay K 2 is by adhesive, tip side K2-1 adhesive, the circuit self-locking, thereby connection lighting load, lighting load is lit, lighting load continues luminous, for the user provides illumination, be user-friendly to.Along with the first capacitor C3 continues charging, the first capacitor C3 both end voltage raises gradually, the level of the triggering input pin 2 of time-base integrated circuit IC1 can constantly descend, when drop to power supply 1/3 the time, circuit upset set, its output pin 3 output high level, output pin 3 is positive voltage, thereby the coil circuit of the first relay K 2 is disconnected, the first relay K 2 dead electricity discharge, and self-locking is removed in tip side K2-1 tripping, thereby lighting load is disconnected, the lighting load automatic distinguishing, and lighting load and power supply disconnect fully, very safe.After lighting load disconnects, the electric energy of the first capacitor C3 storage is released by the internal resistance of time-base integrated circuit IC1, for delay next time, turns off the light and prepares.
Wherein, the first peripheral circuit also comprises that first a diode D6 and who is used to the first capacitor C3 electric discharge is for jamming-proof the second capacitor C4, the first diode D6 connects with the first capacitor C3, and in parallel with the first current-limiting resistance R3, for and the internal resistance of time-base integrated circuit IC1 together with the electric energy stored for the first capacitor C3 leakage path is provided, accelerate the velocity of discharge of the first capacitor C3.The second capacitor C4 is connected on the control end pin 5 of time-base integrated circuit IC1, connects the negative pole of output end of an AC-DC power circuit after control end pin 5 series connection the second capacitor C4 of time-base integrated circuit IC1, for anti-tampering again.In the present embodiment, the first diode D6 is switching diode, and the first capacitor C3 is electrolytic capacitor, and the second capacitor C4 is the ceramic disc capacitor device.
Postpone to turn-off unit and also comprise a LED light of opening for the display delay function, the positive pole of LED light is connected with the output head anode of an AC-DC power circuit, the negative pole of LED light is connected with the negative pole of output end of an AC-DC power circuit, positive pole series connection one second current-limiting resistance R2 in LED light, at closed delay control switch K4, after switching on power, LED light is normally luminous through the second current-limiting resistance R2 current limliting, for the display delay function, open, the prompting user is using and is postponing to turn off the light function, facilitate the user to understand the use state of light fixture.
LED light and the second current-limiting resistance R2 of series connection are in parallel with the first capacitor C3, and the amount of capacity that the delay fall time in the present invention can be by changing the first capacitor C3 or the resistance size of the second current-limiting resistance R2 realize.Strengthen the resistance of capacity or the second current-limiting resistance R2 of the first capacitor C3, postpone the fall time to lengthen, otherwise, reducing the capacity of the first capacitor C3 or reduce the resistance of the second current-limiting resistance R2, shorten time of delay.The delay fall time can be regulated according to customer requirement, and adjustable range is between 15S ~ 60min, and flexible design, can meet the requirement of client to time of delay.
Can form the second diode D7 of short time continuous current circuit with the first relay K 2 one of the coil two ends of the first relay K 2 parallel connected in reverse phase, this second diode D7 can be switching diode, rectifier diode or fast recovery diode.The second diode D7 in the present embodiment selects switching diode.This second diode D7 is used for protecting time-base integrated circuit IC1 itself; become the moment of release by adhesive in the first relay K 2; the coil of the first relay K 2 will form by the second diode D7 the continuous current circuit of short time; make the not mutagenesis of electric current in coil; thereby avoided the generation of back electromotive force in the coil, guaranteed the safety of time-base integrated circuit IC1.
Also increased the block switch unit in the present invention, the block switch unit is used for normal switch K3 and delay control switch K4 are carried out to segmentation control, thereby can control by a mains switch K1, is user-friendly to.
Normal switch K3 is the second relay K 3, and delay control switch K4 is the 3rd relay K 4, and the block switch unit is TC2608 block switch unit.TC2608 block switch unit comprise for civil power between be connected mains switch K1, with the 2nd AC-DC power circuit of mains switch K1 electrical connection, with the segmentation that is TC2608 of the model of the output electrical connection of the 2nd AC-DC power circuit, control IC2 and control the second peripheral circuit of IC2 collocation with segmentation.Mains switch K1 is contact switch, is the master switch of this switching circuit, and for controlling the power supply switching of block switch unit, when mains switch K1 disconnects, whole circuit and power supply disconnect.The 2nd AC-DC power circuit is comprised of the second reduction voltage circuit, the second bridge rectifier and the second filter regulator circuit.The second reduction voltage circuit is comprised of the second decompression capacitor C5 and the second bleeder resistance R4, and the second decompression capacitor C5 is polypropylene capactive, for the 220V High Level AC Voltage by input, carries out step-down; The second bleeder resistance R4 is connected in parallel on the two ends of the second decompression capacitor C5, for the second decompression capacitor C5 provides the path of releasing, so that after the second decompression capacitor C5 quits work, and the electric energy of the second decompression capacitor C5 two ends storage of releasing.The input of the second bridge rectifier is connected with the output of the second reduction voltage circuit, and the second bridge rectifier is comprised of four rectifier diode D8, D9, D10 and D11, for the direct voltage that is unidirectional pulsation by AC voltage conversion.The second filter regulator circuit is comprised of an electrolytic capacitor C6, the 3rd bleeder resistance R5 and a zener diode D12, this electrolytic capacitor C6 is connected with the output of the second bridge rectifier, alternating component for the unidirectional pulsating dc voltage after the filtering rectification, make it to become level and smooth direct voltage; This voltage stabilizing didoe D12 is connected with the output of this second bridge rectifier, for voltage stabilizing.The 3rd bleeder resistance R5 is connected in parallel on the two ends of electrolytic capacitor C6, is used to electrolytic capacitor C6 that the path of releasing is provided.When mains switch K1 is closed, the 220V High Level AC Voltage of input is exported to the second bridge rectifier after the second reduction voltage circuit step-down, carry out rectification by the second bridge rectifier, export the direct voltage of unidirectional pulsation, then control the direct voltage of IC2 output smoothing for the TC2608 segmentation after electrolytic capacitor C6 and zener diode D12 filtering, voltage stabilizing.
The TC2608 segmentation is controlled IC2 and is comprised 8 pins, by pin function, is called: power cathode pin 1, the first output pin 2, reset terminal pin 3, input end of clock pin 4, positive source pin 5, model selection pin 6, the 3rd output pin 7 and the second output pin 8.The second peripheral circuit comprises three resistance R 6, R7, R8, diode D13 and three capacitor C7, C8, C9.
Resistance R 6 is current-limiting resistances, and the output of the second bridge rectifier connects diode D12, D13 and resistance R 8 through R6.The positive source pin 5 of diode D13 connection TC2608 segmentation control IC2 and capacitor C7, capacitor C8, resistance R 7, for the step-down current limliting.The other end of resistance R 8 is connected with the input end of clock pin 4 that IC2 is controlled in the TC2608 segmentation, for providing high level to input end of clock pin 4.This input end of clock pin 4 connects capacitor C9 and is connected to power cathode through capacitor C9, and capacitor C9 is for anti-tampering.Power cathode pin 1, reset terminal pin 3, model selection pin 6, the 3rd output pin 7 that IC2 is controlled in the TC2608 segmentation all are connected and connect power cathode with the other end of capacitor C7, capacitor C8, resistance R 6, capacitor C7 and capacitor C8 strobe, resistance R 7 is bleeder resistance, is used to capacitor C7 and capacitor C8 that the electric energy leakage path is provided.
The first output pin 2 electrical connections of IC2 are controlled in the coil-end of the second relay K 3 and TC2608 segmentation, and the tip side K3-1 of the second relay K 3 is for being connected with lighting load; The second output pin 8 electrical connections of IC2 are controlled in the coil-end of the 3rd relay K 4 and TC2608 segmentation, and the tip side K4-1 of the 3rd relay K 4 is connected with the input of an AC-DC power circuit.During closed electrical source switch K1, the TC2608 segmentation is controlled IC2 and is controlled the first output pin 2 output low levels, connects the coil circuit of the second relay K 3, makes the tip side K3-1 adhesive of the second relay K 3, thereby normally opens lighting load for the first time; Disconnect and during closed electrical source switch K1, the TC2608 segmentation is controlled IC2 and is controlled the first output pin 2 output high level, control the second output pin 8 output low levels, thereby the second relay K 3 is disconnected, the coil circuit of the 3rd relay K 4 is switched on, make the tip side K4-1 adhesive of the 3rd relay K 4, delay circuit forms loop, thereby open, postpones to turn off the light function.In sum, the user is when normal use light fixture, and normally unlatching or powered-down K switch 1 get final product; If the user will use while postponing to turn off the light function, only need be after power-on K switch 1 for the first time, close and power-on K switch 1 function of can start delay turning off the light, simple to operate.
Can form with the second relay K 3 the 3rd diode D14 of short time continuous current circuit one of the coil two ends of the second relay K 3 parallel connected in reverse phase, can form the 4th diode D15 of short time continuous current circuit with the 3rd relay K 4 one of the coil two ends of the 3rd relay K 4 parallel connected in reverse phase, the 3rd diode D14 and the 4th diode D15 can adopt switching diode, rectifier diode or fast recovery diode.The 3rd diode D14 and the 4th diode D15 all are used for protecting the TC2608 segmentation to control IC2 itself, become the moment of release by adhesive in the second relay K 3, the coil of the second relay K 3 will form by the 3rd diode D14 the continuous current circuit of short time, make the not mutagenesis of electric current in this coil, thereby avoided the generation of back electromotive force in this coil, guaranteed the safety of TC2608 segmentation control IC2; Become the moment of release by adhesive in the 3rd relay K 4, the coil of the 3rd relay K 4 will form by the 4th diode D14 the continuous current circuit of short time, make the not mutagenesis of electric current in this coil, thereby avoided the generation of back electromotive force in this coil, guaranteed the safety of TC2608 segmentation control IC2.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure transformation that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (9)
1. the switching circuit with delay feature, it is characterized in that, comprise the normal switch for normally closed or deenergization that can be connected with lighting load, postpone to turn-off unit and turn-off with described delay that unit is connected for opening the delay control switch of delay feature; The first relay that unit comprises an AC-DC power circuit, delay circuit and controlled by described delay circuit is turn-offed in described delay, described delay circuit is comprised of time-base integrated circuit and the first peripheral circuit, described the first peripheral circuit comprises the first capacitor and the first current-limiting resistance, described the first current-limiting resistance and described the first capacitor's series, the positive pole of the output head anode of a described AC-DC power circuit and described the first capacitor is electrically connected, and the negative pole of the negative pole of output end of a described AC-DC power circuit and described the first current-limiting resistance is electrically connected; The pin of described time-base integrated circuit comprises positive source pin, power cathode pin, triggers input pin, output pin, reset terminal pin, control end pin, threshold values end pin and discharge end pin, the positive source pin of described time-base integrated circuit and reset terminal pin are electrically connected at the output head anode of a described AC-DC power circuit, and are electrically connected with the coil electrode of described the first relay; The power cathode pin of described time-base integrated circuit and control end pin are electrically connected at the negative pole of output end of a described AC-DC power circuit; The triggering input pin of described time-base integrated circuit and threshold values end pin are electrically connected between described the first capacitor and described the first current-limiting resistance, with the negative pole of described the first capacitor, are connected; The output pin of described time-base integrated circuit is connected with the coil negative pole of described the first relay, and the tip side of described the first relay is for being connected with lighting load.
2. the switching circuit with delay feature according to claim 1, it is characterized in that, described delay is turn-offed unit and is also comprised a LED light of opening for the display delay function, the positive pole of described LED light is connected with the output head anode of a described AC-DC power circuit, the negative pole of described LED light is connected with the negative pole of output end of a described AC-DC power circuit, at positive pole series connection one second current-limiting resistance of described LED light.
3. the switching circuit with delay feature according to claim 2, is characterized in that, a described AC-DC power circuit is comprised of the first reduction voltage circuit, the first bridge rectifier and the first filter regulator circuit that are electrically connected successively.
4. the switching circuit with delay feature according to claim 1, it is characterized in that, described the first peripheral circuit also comprises that first diode and that is used to described the first capacitor discharge is for jamming-proof the second capacitor, described the first diode and described the first capacitor's series, and in parallel with described the first current-limiting resistance; Described the second capacitor's series is at the control end pin of described time-base integrated circuit.
5. the switching circuit with delay feature according to claim 4, is characterized in that, described the first capacitor is electrolytic capacitor, and described the second capacitor is the ceramic disc capacitor device.
6. the switching circuit with delay feature according to claim 1, it is characterized in that, can form the second diode of short time continuous current circuit with described the first relay one of the coil two ends of described the first relay parallel connected in reverse phase, described the second diode can be switching diode, rectifier diode or fast recovery diode.
7. according to the described switching circuit with delay feature of any one in claim 1 to 6, it is characterized in that, described normal switch is the second relay, described delay control switch is the 3rd relay, also comprises that one for controlling the block switch unit of described the second relay and described the 3rd relay.
8. the switching circuit with delay feature according to claim 7, it is characterized in that, described block switch unit is TC2608 block switch unit, comprise mains switch, the 2nd AC-DC power circuit with described mains switch electrical connection, control IC and control the second peripheral circuit of IC collocation with described segmentation with the segmentation that is TC2608 of the model of the output of described the 2nd AC-DC power circuit electrical connection, the first output electrical connection of IC is controlled in the coil-end of described the second relay and described segmentation, the tip side of described the second relay can be connected with lighting load, the second output electrical connection of IC is controlled in the coil-end of described the 3rd relay and described segmentation, the tip side of described the 3rd relay is connected with the input of a described AC-DC power circuit.
9. the switching circuit with delay feature according to claim 8, it is characterized in that, can form with described the second relay the 3rd diode of short time continuous current circuit one of the coil two ends of described the second relay parallel connected in reverse phase, can form the 4th diode of short time continuous current circuit with described the 3rd relay one of the coil two ends of described the 3rd relay parallel connected in reverse phase, described the 3rd diode and described the 4th diode can be made as switching diode, rectifier diode or fast recovery diode.
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| CN201310273962XA CN103428964A (en) | 2013-07-02 | 2013-07-02 | Switching circuit with delay function |
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| CN201310273962XA CN103428964A (en) | 2013-07-02 | 2013-07-02 | Switching circuit with delay function |
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| CN103428964A true CN103428964A (en) | 2013-12-04 |
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| CN106015574A (en) * | 2016-05-18 | 2016-10-12 | 西安航天计量测试研究所 | Airtight oil-medium reverser |
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| CN111186374A (en) * | 2020-01-12 | 2020-05-22 | 江苏常隆客车有限公司 | Time delay control method for passenger car driver lamp |
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| CN111186374A (en) * | 2020-01-12 | 2020-05-22 | 江苏常隆客车有限公司 | Time delay control method for passenger car driver lamp |
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Application publication date: 20131204 |