CN204650108U - Hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp - Google Patents
Hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp Download PDFInfo
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- CN204650108U CN204650108U CN201520304724.5U CN201520304724U CN204650108U CN 204650108 U CN204650108 U CN 204650108U CN 201520304724 U CN201520304724 U CN 201520304724U CN 204650108 U CN204650108 U CN 204650108U
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Abstract
The utility model discloses a kind of hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp, comprise the battery, an intrinsically safe circuit, a flash control circuit and the LED group that connect successively, described flash control circuit connects an outside camera hotshoe interface.Owing to have employed, this solid volume is little, quality is light, can integrated with camera, easy to use, the advantage that is easy to carry about with one.
Description
Technical field
The utility model relates to a kind of explosion-proof flashlight, particularly relates to a kind of hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp.
Background technology
The flashlamp that single anti-digital camera carries itself, be all generally xenon lamp, xenon lamp brightness is high, but it is high-voltage gas discharging light, and this flashlamp can not apply in the environment having gas explosion danger.So single-lens reflex camera is transformed into the flashlamp of explosion-proof camera standard configuration, must get rid of, not have flashlamp, explosion-proof camera photo of taking pictures under the condition that light is bad is unclear, and effect of taking pictures is affected.Existing flame-proof type explosion-proof flashlamp in addition, the volume weight of its equipment is all larger, and therefore cannot directly be connected on the hot shoe of slr camera, flashlamp be separated with camera body, uses and carries all comparatively inconvenience.At present, still lack and a kind ofly directly can install and connect the anti-explosion LED lamps of the hot shoe interface of explosion-proof camera.
Summary of the invention
The purpose of this utility model is the defect overcoming prior art, and provides a kind of hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp, has explosion-proof effect good, and volume is little, quality is light, can integrated with camera, easy to use, the advantage that is easy to carry about with one.
The technical scheme realizing above-mentioned purpose is:
A kind of hot shoe formula of the present utility model explosion-proof camera LED intrinsic safety type flashlamp, comprise the battery, an intrinsically safe circuit, a flash control circuit and the LED group that connect successively, described flash control circuit connects an outside camera hotshoe interface and is controlled by hot shoe interface signal.
Further improvement of the utility model is, described battery and the common rubber seal of described intrinsically safe circuit insulate in glue-line in one.
Further improvement of the utility model is, described intrinsically safe circuit comprises overload protection element and protection circuit.
Further improvement of the utility model is, described intrinsically safe circuit comprises a plurality of protection circuit.
Further improvement of the utility model is; described intrinsically safe circuit also comprises a current sampling resistor, an intrinsically safe circuit output terminal and an intrinsically safe circuit input end; the input end of described overload protection element connects described anode; the output terminal of described overload protection element connects described protection circuit and described intrinsically safe circuit output terminal, and described protection circuit connects described battery cathode, described current sampling resistor and described intrinsically safe circuit input end.
Further improvement of the utility model is, described protection circuit comprises one first resistance, one first triode, one second resistance, one first metal-oxide-semiconductor and one second metal-oxide-semiconductor, the input end of described first resistance connects the output terminal of described overload protection element, the output terminal of described first resistance connects the collector of described first triode and the grid of described second metal-oxide-semiconductor, the emitter of described first triode connects described battery cathode, the base stage of described first triode connects the input end of described second resistance, the output terminal of described second resistance connects the source electrode of described first metal-oxide-semiconductor and the input end of described current sampling resistor, described current sampling resistor output terminal connects described battery cathode, the drain electrode of described first metal-oxide-semiconductor connects the grid of described second metal-oxide-semiconductor, the grid of described first metal-oxide-semiconductor connects described intrinsically safe circuit input end.
Further improvement of the utility model is, described intrinsically safe circuit also comprises one first diode and a voltage sampling resistor; Described first diode cathode connects described second metal-oxide-semiconductor drain electrode, and described first diode cathode connects described battery cathode, and described voltage sampling resistor is connected between described first metal-oxide-semiconductor grid and described intrinsically safe circuit input end.
Further improvement of the utility model is; described intrinsically safe circuit comprises two protection circuits; the drain electrode of the second metal-oxide-semiconductor of protection circuit described in one first connects described intrinsically safe circuit output terminal; the drain electrode of the second metal-oxide-semiconductor of another protection circuit described in second connects the source electrode of the second metal-oxide-semiconductor of described first protection circuit, and the source electrode of described second protection circuit second metal-oxide-semiconductor connects described current sampling resistor.
Further improvement of the utility model is, described flash control circuit comprises the sample of signal and monostable anti-quiver circuit, self-recoverage presetting bit trigger circuit and a constant current switch circuit that connect successively, described constant current switch circuit connects described LED group, and described sample of signal and the anti-circuit that quivers of monostable connect described camera hotshoe interface.
Further improvement of the utility model is, described constant current switch circuit comprises one the 3rd metal-oxide-semiconductor, one the 4th metal-oxide-semiconductor, one the 3rd resistance, one the 4th resistance, one the 5th resistance, one second triode and one the 6th resistance; The drain electrode of described 3rd metal-oxide-semiconductor is connected the input end of described LED group with the drain electrode of described 4th metal-oxide-semiconductor, the output terminal of described LED group connects described intrinsically safe circuit input end, and the grid of described 3rd metal-oxide-semiconductor connects the source electrode of described 4th metal-oxide-semiconductor; Between the source electrode of described 3rd resistance connection and described 3rd metal-oxide-semiconductor and the grid of described 4th metal-oxide-semiconductor; Described 4th resistance is connected between described 3rd metal-oxide-semiconductor source electrode and the emitter of described second triode; Described 5th resistance is connected between described 3rd metal-oxide-semiconductor source electrode and described second transistor base; Described 6th resistance is connected between described second transistor collector and described self-recoverage presetting bit trigger circuit; The emitter of described second triode connects described intrinsically safe circuit output terminal.
Further improvement of the utility model is, described camera hotshoe interface comprises one first contact and one second contact; Described sample of signal and the anti-circuit that quivers of monostable comprise one first trigger flip-flop, one the 7th resistance, one first electric capacity, one the 8th resistance, one second electric capacity, one the 9th resistance, one the 5th metal-oxide-semiconductor and 1 the tenth resistance; Described 7th resistance is connected between the Q end of described first trigger flip-flop and R end, and described first electric capacity is connected between the R end of described trigger flip-flop and described second contact; The source electrode of described 5th metal-oxide-semiconductor connects the D end of described intrinsically safe circuit output terminal and described first trigger flip-flop, and the drain electrode of described 5th metal-oxide-semiconductor connects the CLK end of described first trigger flip-flop; Described tenth resistance be connected to that described tenth resistance is connected to described 5th metal-oxide-semiconductor between grid and described first contact; Between the drain electrode that described 8th resistance is connected to described 5th metal-oxide-semiconductor and described second contact; Described second electric capacity and described 9th resistor coupled in parallel are between the source electrode and grid of described 5th metal-oxide-semiconductor; The Q end of described first trigger flip-flop is connected described self-recoverage presetting bit trigger circuit with S end.
Further improvement of the utility model is, described self-recoverage presetting bit trigger circuit comprise one second trigger flip-flop, one the 3rd electric capacity, 1 the 11 resistance, one second diode, 1 the 12 resistance, 1 the 13 resistance, one the 3rd diode, one the 4th electric capacity and 1 the 14 resistance; The CLK end of described second trigger flip-flop connects the Q end of described first trigger flip-flop, the D end of described second trigger flip-flop is connected described intrinsically safe circuit input end with R end, described 3rd electric capacity is connected between described second diode cathode and described intrinsically safe circuit output terminal, and the negative pole of described second diode connects the S end of described second steady state trigger; Described 11 resistance is connected between described second diode cathode and described intrinsically safe circuit input end, and described 12 resistance is connected between described second diode cathode and described intrinsically safe circuit input end; Described second diode cathode connects the S end of described first trigger flip-flop; The S end of described second steady state trigger also connects described 3rd diode cathode, and described 3rd diode cathode connects described 4th electric capacity, and described 14 resistance is connected between described 4th electric capacity and described intrinsically safe circuit input end; Between the non-Q that described 13 resistance is connected to described diode cathode and described second trigger flip-flop holds; The Q end of described second trigger flip-flop connects described constant current switch circuit.
Further improvement of the utility model is, described flash control circuit also comprises one the 5th electric capacity, and described 5th electric capacity is connected between described intrinsically safe circuit output terminal and described intrinsically safe circuit input end.
The utility model is owing to have employed above technical scheme, and making it have following beneficial effect is: battery is used for providing power supply to flashlamp.Intrinsically safe circuit realizes this Anhua of output of battery, realizes no-spark driving LED lamp group.Flash control circuit is for receiving the hot shoe signal of camera hotshoe interface, and driving LED flashlamp realizes synchronous with the shutter of camera under the control of hot shoe signal.When Power supply pressure is intrinsic safety, LED group is exactly a resistive load concerning power supply, also just can not produce spark.Battery and intrinsically safe circuit rubber seal form integrative-structure insulating in glue-line, and the no-spark further ensuring battery exports.Overload protection element is used for providing overload protection.Protection circuit is used for providing short-circuit protection to circuit.A plurality of protection circuit is used for providing plural layer short-circuit protection for circuit, when indivedual layer protection circuit breaks down, as long as have one deck can disturb normal work just can provide short-circuit protection to circuit.Sample of signal and monostable prevent quivering circuit for the signal broadening from camera hotshoe interface is triggered next stage.Self-recoverage presetting bit trigger circuit are used for the state circuit of the trigger pip triggered rear a period of time from the first trigger flip-flop being returned to beginning; Make the trigger action synchronous with space shooting shutter of camera hotshoe interface once, flashlamp just flash of light once, realizes the synchronous of flashlamp and shutter.The effect of the 5th electric capacity is the interference of anti-power supply ripple.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp;
Fig. 2 is the intrinsically safe circuit circuit diagram of the utility model hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp;
Fig. 3 is the flash control circuit of the utility model hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp and the syndeton schematic diagram of LED group.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
Refer to Fig. 1, a kind of hot shoe formula of the present utility model explosion-proof camera LED intrinsic safety type flashlamp, directly can be connected to and connect camera hotshoe interface 5, after installing and camera body realize integrative-structure, use with carry all more convenient.
A kind of hot shoe formula of the present utility model explosion-proof camera LED intrinsic safety type flashlamp comprises battery 1, intrinsically safe circuit 2, flash control circuit 3 and the LED group 4 connected successively, and flash control circuit 3 connects an outside camera hotshoe interface 5.
Battery 1 is for providing power supply to flashlamp.Intrinsically safe circuit 2 realizes this Anhua of output of battery 1, realizes no-spark driving LED lamp group 4.Flash control circuit 3 is for receiving the hot shoe signal of camera hotshoe interface 5, and driving LED flashlamp realizes synchronous with the shutter of camera under the control of hot shoe signal.When Power supply pressure is intrinsic safety, LED group 4 is exactly a resistive load concerning power supply, also just can not produce spark.
In the present embodiment, battery 1 insulate in glue-line in one with the common rubber seal of intrinsically safe circuit 2.Battery 1 and intrinsically safe circuit 2 rubber seal form integrative-structure insulate in glue-line, further ensure the no-spark output of battery 1.
Refer to Fig. 2, intrinsically safe circuit 2 comprises overload protection element PTC and protection circuit.Overload protection element PTC is used for providing overload protection, when electric current is more than just blocking power supply during 2A to the power supply of load.Protection circuit is used for providing short-circuit protection to circuit.
In the present embodiment, intrinsically safe circuit 2 comprises two protection circuits.Two protection circuits are used for providing double-deck short-circuit protection for circuit, and when one deck protection circuit breaks down, another layer of protection circuit still can provide short-circuit protection to circuit, thus further increases the security of circuit.
Intrinsically safe circuit 2 also comprises a current sampling resistor R23, an intrinsically safe circuit output terminal P+ and an intrinsically safe circuit input end P-; the input end of overload protection element PTC connects anode; the output terminal of overload protection element PTC connects protection circuit and intrinsically safe circuit output terminal P+, and protection circuit connects battery cathode, current sampling resistor R23 and intrinsically safe circuit input end P-.
In the present embodiment, two protection circuits comprise one first resistance R21 respectively, one first triode Q21, one second resistance R24, one first metal-oxide-semiconductor KD1 and one second metal-oxide-semiconductor Q22, the input end of the first resistance R21 connects the output terminal of overload protection element PTC, the output terminal of the first resistance R21 connects the collector of the first triode Q21 and the grid of the second metal-oxide-semiconductor Q22, the emitter of the first triode Q21 connects battery cathode, the base stage of the first triode Q21 connects the input end of the second resistance R24, the output terminal of the second resistance R24 connects the source electrode of the first metal-oxide-semiconductor KD1 and the input end of current sampling resistor R23, current sampling resistor R23 output terminal connects battery cathode, the drain electrode of the first metal-oxide-semiconductor KD1 connects the grid of the second metal-oxide-semiconductor Q22, the grid of the first metal-oxide-semiconductor KD1 connects intrinsically safe circuit input end P-.Simultaneously; the drain electrode of the second metal-oxide-semiconductor Q22 of one first protection circuit connects intrinsically safe circuit output terminal P+; the drain electrode of the second metal-oxide-semiconductor Q22 of another the second protection circuit connects the source electrode of the second metal-oxide-semiconductor Q22 of the first protection circuit, and the source electrode of the second protection circuit second metal-oxide-semiconductor Q22 connects current sampling resistor R23.
Intrinsically safe circuit 2 also comprises an one first diode D21 and voltage sampling resistor R23; First diode D21 negative pole connects the second metal-oxide-semiconductor Q22 and drains, and the first diode D21 positive pole connects battery cathode, and voltage sampling resistor R23 is connected between the first metal-oxide-semiconductor KD1 grid and intrinsically safe circuit input end P-.
In the present embodiment, the course of work of every layer of protection circuit is as follows:
When voltage sampling resistor R23 detecting the voltage that short-circuit current produces during load short circuits in circuit; at this moment the first triode Q21 conducting immediately; second metal-oxide-semiconductor Q22 ends rapidly; the voltage rise of intrinsically safe circuit input end P-; first metal-oxide-semiconductor KD1 conducting; the cut-off of the second metal-oxide-semiconductor Q22 keeps, and so achieves short-circuit protection.
Refer to Fig. 3, flash control circuit 3 comprises the sample of signal and monostable anti-quiver circuit, self-recoverage presetting bit trigger circuit and a constant current switch circuit that connect successively, constant current switch circuit connects LED group 4, and sample of signal and the anti-circuit that quivers of monostable connect camera hotshoe interface 5.
Wherein, constant current switch circuit comprises one the 3rd metal-oxide-semiconductor U11, one the 4th metal-oxide-semiconductor U12, one the 3rd resistance R1, one the 4th resistance R2, one the 5th resistance R3, one second triode Q1 and the 6th resistance R4; The drain electrode of the 3rd metal-oxide-semiconductor U11 is connected the input end of LED group 4 with the drain electrode of the 4th metal-oxide-semiconductor U12, the output terminal of LED group 4 connects intrinsically safe circuit input end P-and ground connection, and the grid of the 3rd metal-oxide-semiconductor U11 connects the source electrode of the 4th metal-oxide-semiconductor U12; Between the source electrode of the 3rd resistance R1 connection and the 3rd metal-oxide-semiconductor U11 and the grid of the 4th metal-oxide-semiconductor U12; 4th resistance R2 is connected between the emitter of the 3rd metal-oxide-semiconductor U11 source electrode and the second triode Q1; 5th resistance R3 is connected between the 3rd metal-oxide-semiconductor U11 source electrode and the second triode Q1 base stage; 6th resistance R4 is connected between the second triode Q1 collector and self-recoverage presetting bit trigger circuit; The emitter of the second triode Q1 connects intrinsically safe circuit output terminal P+.
In the present embodiment, camera hotshoe interface 5 comprises one first contact P1 and one second contact P2; Sample of signal and the anti-circuit that quivers of monostable comprise one first trigger flip-flop U21, one the 7th resistance R9, one first electric capacity C3, one the 8th resistance R10, one second electric capacity C5, one the 9th resistance R11, one the 5th metal-oxide-semiconductor Q2 and the tenth resistance R12; 7th resistance R9 is connected between the Q end of the first trigger flip-flop U21 and R end, and the first electric capacity C3 is connected between the R end of trigger flip-flop and the second contact P2; The source electrode of the 5th metal-oxide-semiconductor Q2 connects the D end of intrinsically safe circuit output terminal P+ and the first trigger flip-flop U21, and the drain electrode of the 5th metal-oxide-semiconductor Q2 connects the CLK end of the first trigger flip-flop U21; Tenth resistance R12 is connected to the tenth resistance R12 and is connected between the grid of the 5th metal-oxide-semiconductor Q2 and the first contact P1; 8th resistance R10 is connected between the drain electrode of the 5th metal-oxide-semiconductor Q2 and the second contact P2; Between the source electrode that second electric capacity C5 and the 9th resistance R11 is parallel to the 5th metal-oxide-semiconductor Q2 and grid; The Q end of the first trigger flip-flop U21 is connected self-recoverage presetting bit trigger circuit with S end.
Sample of signal and monostable prevent quivering circuit for the signal broadening from camera hotshoe interface 5 is triggered next stage.
In the present embodiment, self-recoverage presetting bit trigger circuit comprise one second trigger flip-flop U22, one the 3rd electric capacity C1,1 the 11 resistance R5, one second diode D2,1 the 12 resistance R6,1 the 13 resistance R7, one the 3rd diode D1, one the 4th electric capacity C2 and 1 the 14 resistance R8; The CLK of the second trigger flip-flop U22 holds the Q end of connection first trigger flip-flop U21, the D end of the second trigger flip-flop U22 is connected intrinsically safe circuit input end P-with R end, 3rd electric capacity C1 is connected between the second diode D2 positive pole and intrinsically safe circuit output terminal P+, and the negative pole of the second diode D2 connects the S end of the second steady state trigger; 11 resistance R5 is connected between the second diode D2 positive pole and intrinsically safe circuit input end P-, and the 12 resistance R6 is connected between the second diode D2 negative pole and intrinsically safe circuit input end P-; Second diode D2 positive pole connects the S end of the first trigger flip-flop U21; The S end of the second steady state trigger also connects the 3rd diode D1 negative pole, and the 3rd diode D1 positive pole connects the 4th electric capacity C2, the 14 resistance R8 and is connected between the 4th electric capacity C2 and intrinsically safe circuit input end P-; Between the non-Q that 13 resistance R7 is connected to diode cathode and the second trigger flip-flop U22 holds; The Q end of the second trigger flip-flop U22 connects constant current switch circuit.
Self-recoverage presetting bit trigger circuit are used for the state circuit of the trigger pip triggered rear a period of time from the first trigger flip-flop U21 being returned to beginning; Make the trigger action synchronous with space shooting shutter of camera hotshoe interface 5 once, flashlamp just flash of light once, realizes the synchronous of flashlamp and shutter.
In addition, flash control circuit 3 also comprises one the 5th electric capacity C4, and the 5th electric capacity C4 is connected between intrinsically safe circuit output terminal P+ and intrinsically safe circuit input end P-.
The effect of the 5th electric capacity is the interference of anti-power supply ripple.
Below embodiment has been described in detail the utility model by reference to the accompanying drawings, and those skilled in the art can make many variations example to the utility model according to the above description.Thus, some details in embodiment should not formed restriction of the present utility model, the utility model by the scope that defines using appended claims as protection domain of the present utility model.
Claims (13)
1. a hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp, is characterized in that, comprises the battery, an intrinsically safe circuit, a flash control circuit and the LED group that connect successively, and described flash control circuit connects an outside camera hotshoe interface.
2. hot shoe formula according to claim 1 explosion-proof camera LED intrinsic safety type flashlamp, is characterized in that: described battery and the common rubber seal of described intrinsically safe circuit insulate in glue-line in one.
3. hot shoe formula according to claim 2 explosion-proof camera LED intrinsic safety type flashlamp, is characterized in that: described intrinsically safe circuit comprises overload protection element and protection circuit.
4. hot shoe formula according to claim 3 explosion-proof camera LED intrinsic safety type flashlamp, is characterized in that: described intrinsically safe circuit comprises a plurality of protection circuit.
5. hot shoe formula according to claim 4 explosion-proof camera LED intrinsic safety type flashlamp; it is characterized in that: described intrinsically safe circuit also comprises a current sampling resistor, an intrinsically safe circuit output terminal and an intrinsically safe circuit input end; the input end of described overload protection element connects described anode; the output terminal of described overload protection element connects described protection circuit and described intrinsically safe circuit output terminal, and described protection circuit connects described battery cathode, described current sampling resistor and described intrinsically safe circuit input end.
6. hot shoe formula according to claim 5 explosion-proof camera LED intrinsic safety type flashlamp, it is characterized in that: described protection circuit comprises one first resistance, one first triode, one second resistance, one first metal-oxide-semiconductor and one second metal-oxide-semiconductor, the input end of described first resistance connects the output terminal of described overload protection element, the output terminal of described first resistance connects the collector of described first triode and the grid of described second metal-oxide-semiconductor, the emitter of described first triode connects described battery cathode, the base stage of described first triode connects the input end of described second resistance, the output terminal of described second resistance connects the source electrode of described first metal-oxide-semiconductor and the input end of described current sampling resistor, described current sampling resistor output terminal connects described battery cathode, the drain electrode of described first metal-oxide-semiconductor connects the grid of described second metal-oxide-semiconductor, the grid of described first metal-oxide-semiconductor connects described intrinsically safe circuit input end.
7. hot shoe formula according to claim 6 explosion-proof camera LED intrinsic safety type flashlamp, is characterized in that: described intrinsically safe circuit also comprises one first diode and a voltage sampling resistor; Described first diode cathode connects described second metal-oxide-semiconductor drain electrode, and described first diode cathode connects described battery cathode, and described voltage sampling resistor is connected between described first metal-oxide-semiconductor grid and described intrinsically safe circuit input end.
8. hot shoe formula according to claim 7 explosion-proof camera LED intrinsic safety type flashlamp; it is characterized in that: described intrinsically safe circuit comprises two protection circuits; the drain electrode of the second metal-oxide-semiconductor of protection circuit described in one first connects described intrinsically safe circuit output terminal; the drain electrode of the second metal-oxide-semiconductor of another protection circuit described in second connects the source electrode of the second metal-oxide-semiconductor of described first protection circuit, and the source electrode of described second protection circuit second metal-oxide-semiconductor connects described current sampling resistor.
9. the hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp according to any one of claim 5-8, it is characterized in that: described flash control circuit comprises the sample of signal and monostable anti-quiver circuit, self-recoverage presetting bit trigger circuit and a constant current switch circuit that connect successively, described constant current switch circuit connects described LED group, and described sample of signal and the anti-circuit that quivers of monostable connect described camera hotshoe interface.
10. hot shoe formula according to claim 9 explosion-proof camera LED intrinsic safety type flashlamp, is characterized in that: described constant current switch circuit comprises one the 3rd metal-oxide-semiconductor, one the 4th metal-oxide-semiconductor, one the 3rd resistance, one the 4th resistance, one the 5th resistance, one second triode and one the 6th resistance; The drain electrode of described 3rd metal-oxide-semiconductor is connected the input end of described LED group with the drain electrode of described 4th metal-oxide-semiconductor, the output terminal of described LED group connects described intrinsically safe circuit input end, and the grid of described 3rd metal-oxide-semiconductor connects the source electrode of described 4th metal-oxide-semiconductor; Between the source electrode of described 3rd resistance connection and described 3rd metal-oxide-semiconductor and the grid of described 4th metal-oxide-semiconductor; Described 4th resistance is connected between described 3rd metal-oxide-semiconductor source electrode and the emitter of described second triode; Described 5th resistance is connected between described 3rd metal-oxide-semiconductor source electrode and described second transistor base; Described 6th resistance is connected between described second transistor collector and described self-recoverage presetting bit trigger circuit; The emitter of described second triode connects described intrinsically safe circuit output terminal.
11. hot shoe formula according to claim 9 explosion-proof camera LED intrinsic safety type flashlamp, is characterized in that: described camera hotshoe interface comprises one first contact and one second contact; Described sample of signal and the anti-circuit that quivers of monostable comprise one first trigger flip-flop, one the 7th resistance, one first electric capacity, one the 8th resistance, one second electric capacity, one the 9th resistance, one the 5th metal-oxide-semiconductor and 1 the tenth resistance; Described 7th resistance is connected between the Q end of described first trigger flip-flop and R end, and described first electric capacity is connected between the R end of described trigger flip-flop and described second contact; The source electrode of described 5th metal-oxide-semiconductor connects the D end of described intrinsically safe circuit output terminal and described first trigger flip-flop, and the drain electrode of described 5th metal-oxide-semiconductor connects the CLK end of described first trigger flip-flop; Described tenth resistance be connected to that described tenth resistance is connected to described 5th metal-oxide-semiconductor between grid and described first contact; Between the drain electrode that described 8th resistance is connected to described 5th metal-oxide-semiconductor and described second contact; Described second electric capacity and described 9th resistor coupled in parallel are between the source electrode and grid of described 5th metal-oxide-semiconductor; The Q end of described first trigger flip-flop is connected described self-recoverage presetting bit trigger circuit with S end.
12. hot shoe formula according to claim 11 explosion-proof camera LED intrinsic safety type flashlamp, is characterized in that: described self-recoverage presetting bit trigger circuit comprise one second trigger flip-flop, one the 3rd electric capacity, 1 the 11 resistance, one second diode, 1 the 12 resistance, 1 the 13 resistance, one the 3rd diode, one the 4th electric capacity and 1 the 14 resistance; The CLK end of described second trigger flip-flop connects the Q end of described first trigger flip-flop, the D end of described second trigger flip-flop is connected described intrinsically safe circuit input end with R end, described 3rd electric capacity is connected between described second diode cathode and described intrinsically safe circuit output terminal, and the negative pole of described second diode connects the S end of described second steady state trigger; Described 11 resistance is connected between described second diode cathode and described intrinsically safe circuit input end, and described 12 resistance is connected between described second diode cathode and described intrinsically safe circuit input end; Described second diode cathode connects the S end of described first trigger flip-flop; The S end of described second steady state trigger also connects described 3rd diode cathode, and described 3rd diode cathode connects described 4th electric capacity, and described 14 resistance is connected between described 4th electric capacity and described intrinsically safe circuit input end; Between the non-Q that described 13 resistance is connected to described diode cathode and described second trigger flip-flop holds; The Q end of described second trigger flip-flop connects described constant current switch circuit.
13. hot shoe formula according to claim 12 explosion-proof camera LED intrinsic safety type flashlamp, it is characterized in that: described flash control circuit also comprises one the 5th electric capacity, described 5th electric capacity is connected between described intrinsically safe circuit output terminal and described intrinsically safe circuit input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520304724.5U CN204650108U (en) | 2015-05-12 | 2015-05-12 | Hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520304724.5U CN204650108U (en) | 2015-05-12 | 2015-05-12 | Hot shoe formula explosion-proof camera LED intrinsic safety type flashlamp |
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| CN204650108U true CN204650108U (en) | 2015-09-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744687A (en) * | 2016-04-25 | 2016-07-06 | 中山天外天防爆照明有限公司 | Intrinsic safety constant current power supply and intrinsic safety light emitting diode (LED) lamp |
| CN110032026A (en) * | 2019-05-20 | 2019-07-19 | 镇江市高等专科学校 | Camera external flash lamp |
-
2015
- 2015-05-12 CN CN201520304724.5U patent/CN204650108U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744687A (en) * | 2016-04-25 | 2016-07-06 | 中山天外天防爆照明有限公司 | Intrinsic safety constant current power supply and intrinsic safety light emitting diode (LED) lamp |
| CN110032026A (en) * | 2019-05-20 | 2019-07-19 | 镇江市高等专科学校 | Camera external flash lamp |
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