CN219513836U - Emergency lamp charging driving circuit and fire emergency lamp - Google Patents
Emergency lamp charging driving circuit and fire emergency lamp Download PDFInfo
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- CN219513836U CN219513836U CN202320601577.2U CN202320601577U CN219513836U CN 219513836 U CN219513836 U CN 219513836U CN 202320601577 U CN202320601577 U CN 202320601577U CN 219513836 U CN219513836 U CN 219513836U
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- emergency lamp
- voltage stabilizing
- charging
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The utility model discloses an emergency lamp charging driving circuit and a fire emergency lamp. The emergency lamp charging driving circuit comprises a constant current module, a rectifying and filtering module, a voltage stabilizing and charging loop and a brightness adjusting circuit. The constant current module comprises a voltage reduction capacitor and at least two constant current resistors, wherein the at least two constant current resistors are connected in series and then are connected with the voltage reduction capacitor in parallel, one end of the voltage reduction capacitor is electrically connected with alternating current mains supply, the other end of the voltage reduction capacitor is electrically connected with the rectification filter module, the other end of the rectification filter module is electrically connected with the voltage stabilizing charging loop and is electrically connected with the rectification filter module and the storage battery, the brightness adjusting circuit is electrically connected with the storage battery and a plurality of lamps, the brightness adjusting circuit is electrically connected with the voltage stabilizing charging loop, and when the alternating current mains supply is disconnected, the brightness adjusting circuit is conducted, and the storage battery supplies power to the lamps.
Description
Technical Field
The utility model relates to the technical field of emergency lamps, in particular to an emergency lamp charging driving circuit and a fire emergency lamp.
Background
The emergency lamp is electrically connected to a normal power supply, and the normal power supply charges the storage battery. When dangerous situations occur or normal power supply is cut off, the storage battery can supply power to the emergency lamp, and the evacuation function is achieved.
The existing emergency lamp is internally provided with a voltage stabilizing chip. When the emergency lamp is connected to a normal power supply, the voltage stabilizing chip can regulate and control the voltage input to the storage battery, so that the storage battery is charged by the normal voltage, but the charging of the storage battery is controlled by adopting the voltage stabilizing chip, so that the production cost of the emergency lamp can be increased, the emergency lamp cannot be widely popularized, and the occupancy rate of the emergency lamp on the market is low.
Disclosure of Invention
The utility model has the advantages that the emergency lamp charging driving circuit and the fire emergency lamp are provided, wherein the constant current module reduces the voltage of alternating current mains supply and maintains stable current through the step-down capacitor and the constant current resistor, so that the emergency lamp charging driving circuit has low production cost and is beneficial to wide popularization.
The utility model has the advantages that the charging driving circuit of the emergency lamp and the fire emergency lamp are provided, wherein the voltage-stabilizing charging circuit can stably charge the storage battery through the cooperation of the two voltage-stabilizing diodes, the two auxiliary resistors and the triode, the traditional voltage-stabilizing chip is replaced, and the production cost of the charging driving circuit of the emergency lamp is further reduced.
To achieve at least one of the above advantages, the present utility model provides an emergency lamp charging driving circuit including:
a constant current module;
a rectifying and filtering module;
a voltage stabilizing charging loop; and
the constant current module comprises a voltage reduction capacitor and at least two constant current resistors, the at least two constant current resistors are connected in series and then connected with the voltage reduction capacitor in parallel, one end of the voltage reduction capacitor is electrically connected with alternating current mains supply, the other end of the voltage reduction capacitor is electrically connected with the rectifying and filtering module, the other end of the rectifying and filtering module is electrically connected with the voltage stabilizing and charging circuit and is electrically connected with the rectifying and filtering module and a storage battery, the brightness adjusting circuit is electrically connected with the storage battery and a plurality of lamps, and the brightness adjusting circuit is electrically connected with the voltage stabilizing and charging circuit.
According to an embodiment of the present utility model, the number of the constant current resistors is two, and the two constant current resistors are connected in series with each other and then connected in parallel with the step-down capacitor.
According to an embodiment of the present utility model, the rectifying and filtering module includes a rectifying bridge and a filtering capacitor, the rectifying bridge has four contacts, two contacts are connected to the positive and negative ends of the ac mains supply, the other two contacts are electrically connected to the filtering capacitor, and the filtering capacitor is electrically connected to the voltage stabilizing charging circuit.
According to an embodiment of the present utility model, the rectifying and filtering module includes a protection resistor, and the protection resistor is connected in series between the rectifying bridge and a negative terminal of the ac mains.
According to an embodiment of the present utility model, the voltage stabilizing charging circuit includes a first voltage stabilizing diode, a second voltage stabilizing diode, a first auxiliary resistor, a second auxiliary resistor and a triode, wherein an anode of the first voltage stabilizing diode is electrically connected to the filter capacitor, a cathode of the first voltage stabilizing diode is electrically connected to one end of the first auxiliary resistor, the other end of the first auxiliary resistor is simultaneously electrically connected to a collector of the triode, an anode of the filter capacitor and one end of the second auxiliary resistor, the other end of the second auxiliary resistor is electrically connected to a base of the triode, an emitter of the triode is electrically connected to the storage battery, a cathode of the second voltage stabilizing diode is electrically connected to the second auxiliary resistor and the base of the triode, and an anode of the second voltage stabilizing diode is grounded, wherein a resistance value of the first auxiliary resistor is smaller than a resistance value of the second auxiliary resistor.
According to an embodiment of the present utility model, the voltage stabilizing charging circuit further includes a diode, an anode of the diode is electrically connected to an anode of the second voltage stabilizing diode, and a cathode of the diode is electrically connected to a cathode of the storage battery.
According to an embodiment of the present utility model, the brightness adjusting circuit includes a switch, a control switch and a regulating resistor, where the control switch has a control end and two conducting ends, the control end is electrically connected to the cathode of the first zener diode, the two conducting ends are correspondingly electrically connected to the switch and the lamp, the switch has a common end, a first end and a second end, the common end is selectively electrically connected to the first end and the second end, the common end is electrically connected to the storage battery, the first end is electrically connected to one end of the regulating resistor, the other end of the regulating resistor is electrically connected to the control switch, and the second end is electrically connected to the control switch.
According to an embodiment of the present utility model, the control switch is implemented as a PMOS transistor, a source of the PMOS transistor is electrically connected to the regulating resistor and the second end at the same time, a drain of the PMOS transistor is electrically connected to the lamp, and a gate of the PMOS transistor is electrically connected to a cathode of the first zener diode.
According to an embodiment of the present utility model, the switch is implemented as a single pole double throw switch, wherein one of the fixed ends of the single pole double throw switch is electrically connected to the regulating resistor, and the other fixed end is electrically connected to the PMOS transistor.
To achieve at least one of the above advantages, the present utility model provides a fire emergency light fixture comprising:
a storage battery;
a plurality of lamps; and
according to the emergency lamp charging driving circuit, the emergency lamp charging driving circuit is electrically connected to an alternating current commercial power, and the emergency lamp charging driving circuit is electrically connected with the storage battery and the lamps, so that the storage battery supplies power to the lamps when the alternating current commercial power is disconnected.
Drawings
Fig. 1 shows a logic block diagram of an emergency lamp charging drive circuit according to the present utility model.
Fig. 2 shows a specific circuit diagram of the emergency lamp charging driving circuit according to the present utility model.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
Referring to fig. 1 to 2, an emergency lamp charging driving circuit according to a preferred embodiment of the present utility model will be described in detail below. The emergency lamp charging driving circuit is electrically connected to an ac mains supply, and comprises a constant current module 10, a rectifying and filtering module 20, a voltage stabilizing charging circuit 30 and a brightness adjusting circuit 40.
The constant current module 10 includes a voltage-reducing capacitor 11 and at least two constant current resistors 12, the at least two constant current resistors 12 are connected in series with each other and then connected in parallel with the voltage-reducing capacitor 11, one end of the voltage-reducing capacitor 11 is electrically connected to the ac mains supply, the other end of the voltage-reducing capacitor 11 is electrically connected to the rectifying and filtering module 20, and the voltage of the ac mains supply input to the rectifying and filtering module 20 is reduced by the voltage-reducing capacitor 11 and the constant current resistors 12, and the current of the ac mains supply input to the rectifying and filtering module 20 is maintained.
The other end of the rectifying and filtering module 20 is electrically connected to the voltage stabilizing and charging circuit 30, the rectifying and filtering module 20 is suitable for changing the ac mains supply into dc, and the rectifying and filtering module 20 also has a filtering function, so that the dc is changed into smooth dc.
The voltage stabilizing charging circuit 30 is electrically connected to the rectifying and filtering module 20 and the battery 900, and the voltage stabilizing charging circuit 30 is adapted to regulate the voltage of the electric signal input to the battery 900, so as to ensure that the battery 900 is charged smoothly.
The brightness adjusting circuit 40 is electrically connected to the storage battery 900 and the lamps 800, the brightness adjusting circuit 40 is electrically connected to the voltage stabilizing charging circuit 30, and the brightness adjusting circuit 40 is adapted to adjust the voltage input to the lamps 800 by the storage battery 900, so as to adjust the brightness of the lamps 800. When the brightness adjusting circuit 40 receives the high-level signal of the voltage-stabilized charging loop 30, the brightness adjusting circuit 40 is not conducted, when the brightness adjusting circuit 40 receives the low-level signal of the voltage-stabilized charging loop 30, the brightness adjusting circuit 40 is conducted, and the storage battery 900 supplies power to the lamp 800.
The voltage of the alternating current mains supply and the current maintaining the alternating current mains supply are reduced through the voltage reducing capacitor 11 and the constant current resistor 12, the conventional transformer voltage reduction can be avoided, the functions of constant current and voltage reduction are realized with lower production cost, and therefore the production cost of the emergency lamp charging driving circuit is reduced.
The number of the constant current resistors 12 is two, and the two constant current resistors 12 are connected in series and then connected in parallel with the step-down capacitor 11.
The rectifying and filtering module 20 includes a rectifying bridge 21 and a filtering capacitor 22, the rectifying bridge 21 has four contacts, two of the contacts are connected to the positive and negative ends of the ac mains supply, the other two of the contacts are electrically connected to the filtering capacitor 22, the filtering capacitor 22 is electrically connected to the voltage stabilizing charging circuit 30, the ac mains supply outputs dc to the filtering capacitor 22 through the rectifying bridge 21, so as to achieve the purpose of converting ac into dc, and the filtering capacitor 22 is used for stabilizing the voltage of the dc at a fixed value, so that the dc voltage flowing from the filtering capacitor 22 is smoother.
The rectifying and filtering module 20 includes a protection resistor 23, the protection resistor 23 is connected in series between the rectifier bridge 21 and the negative terminal of the ac mains, and the protection resistor 23 can be fused when the current of the ac mains is too large, so as to avoid damage to other electronic elements in the circuit.
The voltage stabilizing charging circuit 30 includes a first voltage stabilizing diode 31, a second voltage stabilizing diode 32, a first auxiliary resistor 33, a second auxiliary resistor 34 and a triode 35, wherein the positive electrode of the first voltage stabilizing diode 31 is electrically connected to the filter capacitor 22 and the brightness adjusting circuit 40 at the same time, the negative electrode of the first voltage stabilizing diode 31 is electrically connected to one end of the first auxiliary resistor 33, the other end of the first auxiliary resistor 33 is electrically connected to the collector of the triode 35, the positive electrode of the filter capacitor 22 and one end of the second auxiliary resistor 34 at the same time, the other end of the second auxiliary resistor 34 is electrically connected to the base of the triode 35, the emitter of the triode 35 is electrically connected to the storage battery 900, the negative electrode of the second voltage stabilizing diode 32 is electrically connected to the second auxiliary resistor 34 and the base of the triode 35, and the positive electrode of the second voltage stabilizing diode 32 is grounded, wherein the resistance of the first auxiliary resistor 33 is smaller than the resistance of the second auxiliary resistor 34. When the electric signal in the ac mains supply is changed into dc by the rectifying and filtering module 20, the dc is input into the first zener diode 31, and the dc flows into the second zener diode 32 after being divided by the second auxiliary resistor 34, and the resistance of the first auxiliary resistor 33 is greater than that of the second auxiliary resistor 34, and under the action of the second zener diode 32, the voltage received by the base of the triode 35 is higher than the self-conduction voltage, so that the collector of the triode 35 is conducted with the emitter of the triode 35, and the electric signal flowing through the filtering capacitor 22 can flow into the storage battery 900, thereby charging the storage battery 900. In addition, the second zener diode 32 is electrically connected to the base of the triode 35, and the second zener diode 32 is adapted to prevent the voltage input to the triode 35 from exceeding the rated voltage, thereby ensuring that the voltage input to the battery 900 is not excessively high.
The voltage stabilizing charging circuit 30 further comprises a diode 36, wherein the anode of the diode 36 is electrically connected to the anode of the second voltage stabilizing diode 32, the cathode of the diode 36 is electrically connected to the cathode of the battery 900, and the diode 36 is used for preventing current from flowing from the cathode of the battery 900 to the triode 35.
In order to ensure that the storage battery does not receive excessive charging voltage, a voltage stabilizing chip is generally arranged in the circuit, but the cost of the voltage stabilizing chip is too high, so that the cost of the charging driving circuit of the emergency lamp is too high, and the voltage stabilizing charging circuit 30 in the utility model adopts the cooperation of two voltage stabilizing diodes, two auxiliary resistors and a triode, so that the storage battery can be stably charged, and the design cost is low, so that the charging driving circuit of the emergency lamp is widely popularized.
When the battery 900 is connected to the circuit, the positive electrode and the negative electrode of the battery 900 may be reversely connected, and at this time, the positive electrode of the battery 900 inputs an electrical signal to the diode 36, and the diode 36 can prevent the electrical signal of the battery 900 from flowing into the triode 35, thereby playing a role in protecting the circuit.
The brightness adjusting circuit 40 includes a switch 41, a control switch 42 and a regulating resistor 43, wherein the control switch 42 has a control end and two conducting ends, the control end is electrically connected to the cathode of the first zener diode 31, and the two conducting ends are correspondingly electrically connected to the switch 41 and the lamp 800. When the control end receives signals, the two conducting ends are conducted, and the storage battery 900 supplies power to the lamp 800. The switch 41 has a common terminal 411, a first terminal 412 and a second terminal 413, wherein the common terminal 411 is selectively electrically connected to the first terminal 412 and the second terminal 413, the common terminal 411 is electrically connected to the battery 900, the first terminal 412 is electrically connected to one end of the regulating resistor 43, the other end of the regulating resistor 43 is electrically connected to the control switch 42, and the second terminal 413 is electrically connected to the control switch 42. When the common terminal 411 is electrically connected to the second terminal 413 and the two conducting terminals of the control switch 42 are conducting, the storage battery 900 supplies power to the lamp 800, and the lamp 800 works. When the common terminal 411 is electrically connected to the first terminal 412, the regulating resistor 43 is connected in series with the lamp 800, and the regulating resistor 43 can reduce the brightness of the lamp 800, so that the lamp 800 can be used for a long time. By controlling the change-over switch 41, the brightness of the lamp 800 can be changed, and the time for the battery 900 to light the lamp 800 can be prolonged.
The control switch 42 is implemented as a PMOS transistor, a source of the PMOS transistor is electrically connected to the regulating resistor 43 and the second end 413, a drain of the PMOS transistor is electrically connected to the lamp 800, and a gate of the PMOS transistor is electrically connected to the cathode of the first zener diode 31. When current flows through the first zener diode 31, the negative electrode of the first zener diode 31 transmits a high level to the gate of the PMOS transistor, the source and the drain of the PMOS transistor are not conductive at this time, when the external ac mains supply is powered off, no current flows through the first zener diode 31, the positive electrode of the first zener diode 31 is grounded, at this time, the gate of the PMOS transistor receives a low level signal, the source and the drain of the PMOS transistor are conductive, the battery 900 can supply power to the lamp 800 through the switch 41, and at this time, the brightness of the lamp 800 can be regulated by regulating the switch 41.
The switch 41 is implemented as a single pole double throw switch having one movable end and two stationary ends, wherein the movable end is electrically connected to the battery 900, one of the stationary ends of the single pole double throw switch is electrically connected to the regulating resistor 43, and the other stationary end is electrically connected to the PMOS transistor. Specifically, the switch 41 may also be implemented as a single-pole three-throw switch, and the two stationary ends of the single-pole three-throw switch are electrically connected with the regulating resistors 43 with different resistance values, so that the regulating resistors 42 with different resistance values are connected in series with the lamp 800, and the brightness of the lamp 800 can be adjusted in three gears.
The utility model also discloses a fire emergency lamp, which comprises a storage battery 900, a plurality of lamps 800 and an emergency lamp charging driving circuit, wherein the emergency lamp charging driving circuit is connected with an alternating current commercial power, the emergency lamp charging driving circuit is electrically connected with the storage battery 900 and the lamps 800, when the alternating current commercial power works normally, the emergency lamp charging driving circuit is suitable for charging the storage battery 900, and the storage battery 900 does not supply power to the lamps 800; if the ac mains supply is disconnected, the storage battery 900 supplies power to the plurality of lamps 800.
In the working principle, after the ac mains supply is input into the rectifier bridge 21 through the step-down capacitor 11 and the two constant current resistors 12, the voltage of the ac mains supply is reduced, and the current is kept stable. Specifically, the step-down capacitor 11 may be implemented as a step-down capacitor of CBB105J/400V, and the resistances of the two constant current resistors 12 are 200kΩ, and the current of the ac mains current flowing into the rectifier bridge 21 is about 70 mA. The ac mains supply is changed into a stable dc by the action of the rectifier bridge 21 and the filter capacitor 22, and is input to the voltage-stabilizing charging circuit 30 through the dc to charge the storage battery 900.
The PMOS transistor is provided in the brightness adjusting circuit 40, and is turned on only when the first zener diode 31 is at a low level, the battery 900 can supply power to the lamp 800, and when the battery 900 supplies power, the switch 41 is adjusted to enable the adjusting resistor 43 to be connected to the lamp 800 or not connected to the lamp 800, so that the brightness of the lamp 800 is adjusted, and the power supply time of the battery 900 to the lamp 800 is prolonged.
It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present utility model have been fully and effectively realized. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from the principles described.
Claims (10)
1. Emergency light drive circuit that charges, its characterized in that, emergency light drive circuit that charges includes:
a constant current module;
a rectifying and filtering module;
a voltage stabilizing charging loop; and
the constant current module comprises a voltage reduction capacitor and at least two constant current resistors, the at least two constant current resistors are connected in series and then connected with the voltage reduction capacitor in parallel, one end of the voltage reduction capacitor is electrically connected with alternating current mains supply, the other end of the voltage reduction capacitor is electrically connected with the rectifying and filtering module, the other end of the rectifying and filtering module is electrically connected with the voltage stabilizing and charging circuit and is electrically connected with the rectifying and filtering module and a storage battery, the brightness adjusting circuit is electrically connected with the storage battery and a plurality of lamps, and the brightness adjusting circuit is electrically connected with the voltage stabilizing and charging circuit.
2. The emergency lamp charging driving circuit according to claim 1, wherein the number of the constant current resistors is two, and the two constant current resistors are connected in series with each other and then connected in parallel with the step-down capacitor.
3. The emergency lamp charging driving circuit according to claim 2, wherein the rectifying and filtering module comprises a rectifying bridge and a filtering capacitor, the rectifying bridge has four contacts, two contacts are connected to the positive and negative ends of the ac mains supply, the other two contacts are electrically connected to the filtering capacitor, and the filtering capacitor is electrically connected to the voltage stabilizing charging circuit.
4. The emergency lamp charging drive circuit of claim 3, wherein the rectifying and filtering module comprises a protection resistor connected in series between the rectifier bridge and a negative terminal of the ac mains.
5. The emergency lamp charging driving circuit according to claim 4, wherein the voltage stabilizing charging circuit comprises a first voltage stabilizing diode, a second voltage stabilizing diode, a first auxiliary resistor, a second auxiliary resistor and a triode, wherein the anode of the first voltage stabilizing diode is electrically connected with the filter capacitor, the cathode of the first voltage stabilizing diode is electrically connected with one end of the first auxiliary resistor, the other end of the first auxiliary resistor is simultaneously electrically connected with the collector of the triode, the anode of the filter capacitor and one end of the second auxiliary resistor, the other end of the second auxiliary resistor is electrically connected with the base of the triode, the emitter of the triode is electrically connected with the storage battery, the cathode of the second voltage stabilizing diode is electrically connected with the second auxiliary resistor and the base of the triode, and the anode of the second voltage stabilizing diode is grounded, wherein the resistance of the first auxiliary resistor is smaller than the resistance of the second auxiliary resistor.
6. The emergency lamp charging driving circuit of claim 5, wherein the regulated charging loop further comprises a diode, the anode of the diode is electrically connected to the anode of the second regulated diode, and the cathode of the diode is electrically connected to the cathode of the battery.
7. The emergency lamp charging drive circuit of claim 5, wherein the brightness adjustment circuit comprises a switch, a control switch and a regulating resistor, the control switch has a control end and two conducting ends, the control end is electrically connected with the cathode of the first zener diode, the two conducting ends are correspondingly electrically connected with the switch and the lamp, the switch has a common end, a first end and a second end, the common end is selectively electrically connected with the first end and the second end, the common end is electrically connected with the storage battery, the first end is electrically connected with one end of the regulating resistor, the other end of the regulating resistor is electrically connected with the control switch, and the second end is electrically connected with the control switch.
8. The emergency lamp charging drive circuit of claim 7, wherein the control switch is implemented as a PMOS transistor, a source of the PMOS transistor is electrically connected to both the regulation resistor and the second terminal, a drain of the PMOS transistor is electrically connected to the lamp, and a gate of the PMOS transistor is electrically connected to a cathode of the first zener diode.
9. The emergency lamp charging drive circuit of claim 8, wherein the change-over switch is implemented as a single pole double throw switch, one of the stationary ends of the single pole double throw switch being electrically connected to the regulating resistor, the other stationary end being electrically connected to the PMOS tube.
10. Fire emergency lamp, its characterized in that, fire emergency lamp includes:
a storage battery;
a plurality of lamps; and
the emergency lamp charging drive circuit of any one of claims 1-9, said emergency lamp charging drive circuit being electrically connected to an ac mains supply, said emergency lamp charging drive circuit being arranged to electrically connect said battery and a number of said luminaires, such that said battery powers a number of said luminaires when said ac mains supply is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320601577.2U CN219513836U (en) | 2023-03-23 | 2023-03-23 | Emergency lamp charging driving circuit and fire emergency lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320601577.2U CN219513836U (en) | 2023-03-23 | 2023-03-23 | Emergency lamp charging driving circuit and fire emergency lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219513836U true CN219513836U (en) | 2023-08-11 |
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ID=87547798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320601577.2U Active CN219513836U (en) | 2023-03-23 | 2023-03-23 | Emergency lamp charging driving circuit and fire emergency lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219513836U (en) |
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2023
- 2023-03-23 CN CN202320601577.2U patent/CN219513836U/en active Active
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