Lamp using auxiliary controller to control power-off retraction of lens

Abstract

The utility model discloses a lamp utilizing an auxiliary controller to control power-off retraction of a lens, which comprises a driving motor used for driving the lens positioned at a light outlet of a lamp holder to extend and retract, a main controller powered by a switching power supply, and the auxiliary controller powered by an energy storage module and used for controlling retraction of the lens, the main controller and the auxiliary controller are both in signal connection with a driving circuit of the driving motor, and the switching switch is used for communicating the energy storage module with the auxiliary controller and the driving circuit when the switching power supply is powered off. According to the lamp using the auxiliary controller to control the power-off retraction of the lens, through the arrangement of the energy storage module and the auxiliary controller, after the switching power supply powers off the main controller and the driving circuit, hardware can be automatically switched to the energy storage module to supply power to the auxiliary controller and the driving circuit; and an instruction is automatically sent to enable the driving circuit to control the driving motor to drive the lens to retract into the lamp holder. Therefore, the lens can be effectively protected and is prevented from being always damaged outside the lamp holder after the lamp is powered off.

Description

Technical Field

[0001] The utility model relates to the technical field of stage lamps, and more particularly to a lamp which utilizes an auxiliary controller to control the lens to retract when power is cut off. Background Art

[0002] For some lamps with lenses that extend outside the lamp, when the operator directly cuts off the power to the lamp, the lens will be in the final state, which may be completely protruding from the outside of the lamp, or it may be half-protruding. When these two situations occur, the lens can easily be damaged by collision when the lamp is disassembled, moved or packed. This will greatly shorten the service life of the lamp. How to control the lens to retract into the lamp after the power is cut off has become a technical problem to be solved by those skilled in the art. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art, the present invention provides a lamp which uses an auxiliary controller to control the lens to retract when the lamp is powered off. When the lamp is powered off, the lens automatically retracts into the lamp head.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a lamp that uses an auxiliary controller to control the retraction of the lens when the power is cut off, including a driving motor for driving the lens located at the light outlet of the lamp head to extend and retract, a main controller powered by a switching power supply, and an auxiliary controller powered by an energy storage module and controlling the retraction of the lens. The main controller and the auxiliary controller are both connected to the driving circuit signal of the driving motor, and also include a switching switch that connects the energy storage module with the auxiliary controller and the driving circuit when the switching power supply is powered off.

[0005] The lamp that uses an auxiliary controller to control lens retraction upon power failure is equipped with an energy storage module and an auxiliary controller. When the switching power supply cuts off power to the main controller and the drive circuit, the hardware automatically switches to the energy storage module to supply power to the auxiliary controller and the drive circuit. When the auxiliary controller is powered on, it automatically sends a command to the drive circuit to control the drive motor to retract the lens into the lamp head. This effectively protects the lens from damage caused by remaining outside the lamp head after the lamp is powered off.

[0006] Furthermore, the switching switch is a field-effect transistor, the G terminal of the field-effect transistor is connected to the switching power supply, the S terminal of the field-effect transistor is connected to the energy storage module, and the D terminal of the field-effect transistor is connected to the auxiliary controller and the drive circuit. The field-effect transistor has the advantages of high-speed switching capability, low power consumption, small size, and high reliability.

[0007] Further, the switch is a relay, a coil end of the relay is connected with the switch power supply, a common end of the relay is connected with the energy storage module, a normally closed end of the relay is connected with the auxiliary controller and the drive circuit. The relay can bear high current and high voltage, and has long service life and is not easy to be damaged.

[0008] Further, the energy storage module is an energy storage capacitor, which is charged by the switch power supply. In this way, the lamp does not need to additionally provide a battery, which is conducive to meeting various safety specifications.

[0009] Further, a reverse prevention module is arranged between the energy storage module and the switch power supply, which only allows current to flow from the switch power supply to the energy storage module. The reverse prevention module can avoid the current of the energy storage module directly flowing back to the switch power supply in reverse, thereby indirectly supplying power to the main controller, causing the main controller and the auxiliary controller to work at the same time, and causing confusion.

[0010] Further, a reverse prevention module is arranged between the drive circuit and the switch power supply, which only allows current to flow from the switch power supply to the drive circuit. The reverse prevention module can avoid the current of the energy storage module flowing back to the switch power supply in reverse through the drive circuit, thereby indirectly supplying power to the main controller, causing the main controller and the auxiliary controller to work at the same time, and causing confusion.

[0011] Further, the switch connects the energy storage module with the auxiliary controller and the drive circuit, and a reverse prevention module is arranged between the drive circuit and the switch, which only allows current to flow from the switch to the drive circuit. The reverse prevention module can avoid, when the switch power supply normally supplies power, the current thereof flowing to the auxiliary controller through the drive circuit, thereby indirectly supplying power to the auxiliary controller, causing the main controller and the auxiliary controller to work at the same time, and causing confusion.

[0012] Further, the reverse prevention module is a diode or a field effect transistor. The diode circuit has simple design and low cost, and is suitable for small current and low cost circuit protection, such as some simple power supply circuits. The field effect transistor has low conduction voltage drop and low internal resistance characteristics, and is suitable for circuits requiring low voltage drop and high current, such as motor drivers.

[0013] Further, a stroke detection device for detecting that the lens is retracted to the position is further included, and the stroke detection device is connected with the auxiliary controller. In this way, after the lens is retracted to the position, the drive motor can stop working under the indication of the auxiliary controller, thereby avoiding damage to the motor or emitting abnormal sound.

[0014] Furthermore, the travel detection device is a magnetic switch. The magnetic switch has simple structure, is sensitive and reliable, has low cost, and has strong anti-interference ability, good waterproof performance, long operating distance, and high temperature resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the principle of the utility model using an auxiliary controller to control the lens to retract when power is cut off.

[0016] Figure 2 It is a structural diagram of the lamp of the present utility model.

[0017] Figure 3 This is a schematic diagram of the circuit structure of the utility model using the field effect tube as a switching switch.

[0018] Figure 4 This is a schematic diagram of the circuit structure of the utility model in which the relay is used as a switching switch.

[0019] In the picture:

[0020] 100. Lamp head; 110. Light outlet; 120. Lens; 210. Drive motor; 220. Switching power supply; 230. Main controller; 240. Energy storage module; 250. Auxiliary controller; 260. Switch; 270. Anti-reverse module; 280. Travel detection device; 290. Drive circuit; 300. Arm; 400. Chassis. DETAILED DESCRIPTION

[0021] The drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate the embodiments, some components in the drawings may be omitted, enlarged, or reduced in size, and do not represent actual product dimensions. Those skilled in the art will understand that some well-known structures and their descriptions may be omitted from the drawings. The positional relationships depicted in the drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0022] like Figure 1 and Figure 2 The present invention provides a lamp that uses an auxiliary controller to control the retraction of the lens when the power is cut off, including a driving motor 210 for driving the lens 120 located at the light outlet 110 of the lamp head 100 to extend and retract, a main controller 230 powered by a switching power supply 220, and an auxiliary controller 250 powered by an energy storage module 240 and controlling the retraction of the lens 120. The main controller 230 and the auxiliary controller 250 are both signal-connected to the driving circuit 290 of the driving motor 210, and also include a switching switch 260 that connects the energy storage module 240 with the auxiliary controller 250 and the driving circuit 290 when the switching power supply 220 is powered off.

[0023] The lamp that uses the auxiliary controller 250 to control the lens 120 to retract upon power failure is provided with an energy storage module 240 and an auxiliary controller 250. After the switching power supply 220 powers off the main controller 230 and the drive circuit 290, the hardware automatically switches to the energy storage module 240 to power the auxiliary controller 250 and the drive circuit 290. After the auxiliary controller 250 is powered on, it automatically sends a command to the drive circuit 290 to control the drive motor 210 to drive the lens 120 to retract into the lamp head 100. This effectively protects the lens 120 from being damaged by remaining outside the lamp head 100 after the lamp is powered off.

[0024] In this embodiment, the instruction stored in the auxiliary controller 250 is an instruction to control the driving motor 210 to drive the lens 120 to retract into the lamp head 100 when the power is turned on, which is sent to the driving circuit 290.

[0025] like Figure 3 In a preferred embodiment of the present invention, the switch 260 is a field-effect transistor (FET). The G terminal of the FET is connected to the switching power supply 220, the S terminal of the FET is connected to the energy storage module 240, and the D terminal of the FET is connected to the auxiliary controller 250 and the drive circuit 290. FETs have the advantages of high-speed switching capability, low power consumption, small size, and high reliability.

[0026] In this embodiment, a current limiting resistor is further provided between the G terminal of the field effect transistor and the switching power supply 220 .

[0027] like Figure 4 In a preferred embodiment of the present invention, the switch 260 is a relay, the coil end of the relay is connected to the switching power supply 220, the common end of the relay is connected to the energy storage module 240, and the normally closed end of the relay is connected to the auxiliary controller 250 and the drive circuit 290. The relay can withstand high current and high voltage, has a long life, and is not easily damaged.

[0028] It should be noted that a step-down circuit may be provided between the coil end of the relay and the switching power supply 220 , but the step-down circuit must be powered directly or indirectly by the coil switching power supply 220 .

[0029] When the switching power supply 220 is powered, the coil end of the relay works, so that the common end of the relay remains connected to its normally open end, and the energy storage module 240 is disconnected from the auxiliary controller 250 and the drive circuit 290. When the switching power supply 220 is powered off, the coil end of the relay does not work, and the common end of the relay is attracted to the normally closed end, connecting the energy storage module 240 to the auxiliary controller 250 and the drive circuit 290, and using the energy storage module 240 to power the auxiliary controller 250 and the drive circuit 290. Figure 4 : shown is the common terminal position of the relay when the switching power supply 220 is powered off.

[0030] like Figure 1 、 Figure 3 and Figure 4 In a preferred embodiment of the present invention, the energy storage module 240 is an energy storage capacitor, which is charged by the switching power supply 220. In this way, there is no need to set up an additional battery on the lamp, which is conducive to meeting various safety regulations.

[0031] In this embodiment, the energy storage capacitor includes three capacitors connected in parallel, each with a capacitance of 5600 uf and a withstand voltage of 50 V.

[0032] In this embodiment, the energy storage capacitor is further connected in parallel with an absorption resistor to absorb the remaining energy in the energy storage capacitor after the lens 120 is retracted into place. The number of the absorption resistors is two and connected in parallel.

[0033] In this embodiment, a protection diode is further connected in parallel to the energy storage capacitor.

[0034] In a preferred embodiment of the present invention, an anti-reverse flow module 270 is provided between the energy storage module 240 and the switching power supply 220 to prevent current from flowing directly from the switching power supply 220 to the energy storage module 240. The anti-reverse flow module 270 prevents the current from the energy storage module 240 from directly flowing back to the switching power supply 220, thereby indirectly powering the main controller 230 and causing the main controller 230 and the auxiliary controller 250 to operate simultaneously, thereby causing confusion.

[0035] In this embodiment, a buffer resistor is further provided between the energy storage module 240 and the anti-reverse module 270 , preferably a negative temperature coefficient thermistor, to reduce the instantaneous surge current when power is applied.

[0036] In the preferred embodiment of the utility model, the anti-reverse module 270 is arranged between the driving circuit 290 and the switching power supply 220, and only allows current to flow from the switching power supply 220 to the driving circuit 290. The anti-reverse module 270 can avoid the current of the energy storage module 240 flowing back to the switching power supply 220 through the driving circuit 290, thereby indirectly supplying power to the main controller 230, causing the main controller 230 and the auxiliary controller 250 to work simultaneously, and causing confusion.

[0037] In the preferred embodiment of the utility model, the switching switch 260 connects the energy storage module 240 with the auxiliary controller 250 and the driving circuit 290, and an anti-reverse module 270 is arranged between the driving circuit 290 and the switching switch 260, and only allows current to flow from the switching switch 260 to the driving circuit 290. When the switching power supply 220 normally supplies power, the anti-reverse module 270 can avoid the current flowing from the driving circuit 290 to the auxiliary controller 250, thereby indirectly supplying power to the auxiliary controller 250, causing the main controller 230 and the auxiliary controller 250 to work simultaneously, and causing confusion.

[0038] In the preferred embodiment of the utility model, the anti-reverse module 270 is a diode or a field effect tube. The diode circuit has simple design and low cost, and is suitable for small current and low cost circuit protection, such as some simple power supply circuits. The field effect tube has low on-voltage drop and low internal resistance characteristics, and is suitable for circuits requiring low voltage drop and high current, such as motor drivers.

[0039] In the embodiment, the anti-reverse module 270 is a diode, the anti-reverse module 270 between the energy storage module 240 and the switching power supply 220 is two series-connected diodes, the voltage drop is larger than that of a single diode, the anti-reverse module 270 between the driving circuit 290 and the switching power supply 220 is two parallel-connected diodes, and the parallel connection of the diodes can slow down the leakage current characteristics, and the anti-reverse module 270 between the driving circuit 290 and the switching switch 260 is two parallel-connected diodes, and the parallel connection of the diodes can slow down the leakage current characteristics.

[0040] In the preferred embodiment of the utility model, a stroke detection device 280 (not shown) for detecting that the lens 120 is retracted to the position is further included, and the stroke detection device 280 is signal connected with the auxiliary controller 250. In this way, after the lens 120 is retracted to the position, the driving motor 210 can stop working under the indication of the auxiliary controller 250, avoiding damage to the motor or emitting abnormal sound.

[0041] In a preferred embodiment of the present invention, the travel detection device 280 is a magnetic switch having simple structure, sensitivity, reliability, low cost, strong anti-interference ability, good waterproof performance, long operating distance and high temperature resistance.

[0042] like Figure 2 In a preferred embodiment of the present invention, the lamp further includes an arm 300 for supporting the rotation of the lamp head 100 and a chassis 400 for supporting the rotation of the arm 300 .

[0043] In this embodiment, the lens 120 is provided in multiple numbers and is mounted on a mounting plate. The lens 120 is driven to move and retract as a whole by the drive motor 210. The magnet in the magnetic switch is mounted on the mounting plate and moves with it. The detector in the magnetic switch is mounted within the lamp head 100.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A lamp that uses an auxiliary controller to control the lens to retract when power is off, characterized in that: The invention comprises a driving motor (210) for driving a lens (120) located at a light outlet (110) of a lamp head (100) to extend and retract, a main controller (230) powered by a switching power supply (220), and an auxiliary controller (250) powered by an energy storage module (240) and controlling the retraction of the lens (120), wherein the main controller (230) and the auxiliary controller (250) are both signal-connected to a driving circuit (290) of the driving motor (210), and further comprises a switching switch (260) for connecting the energy storage module (240) with the auxiliary controller (250) and the driving circuit (290) when the switching power supply (220) is powered off.

2. The lamp according to claim 1, characterized in that The switching switch (260) is a field effect tube, the G pole of the field effect tube is connected to the switching power supply (220), the S pole of the field effect tube is connected to the energy storage module (240), and the D pole of the field effect tube is connected to the auxiliary controller (250) and the drive circuit (290).

3. The lamp according to claim 1, characterized in that The switching switch (260) is a relay, the coil end of the relay is connected to the switching power supply (220), the common end of the relay is connected to the energy storage module (240), and the normally closed end of the relay is connected to the auxiliary controller (250) and the drive circuit (290).

4. The lamp according to claim 1, characterized in that The energy storage module (240) is an energy storage capacitor and is charged by the switching power supply (220).

5. The lamp according to claim 4, characterized in that An anti-reverse module (270) is provided between the energy storage module (240) and the switching power supply (220), which only allows current to flow from the switching power supply (220) to the energy storage module (240).

6. The lamp according to claim 1, characterized in that An anti-reverse module (270) is provided between the drive circuit (290) and the switching power supply (220), which only allows current to flow from the switching power supply (220) to the drive circuit (290).

7. The lamp according to claim 1, characterized in that The switching switch (260) connects the energy storage module (240) with the auxiliary controller (250) and the drive circuit (290), and an anti-reverse module (270) is provided between the drive circuit (290) and the switching switch (260) for only allowing current to flow from the switching switch (260) to the drive circuit (290).

8. The lamp according to any one of claims 5 to 7, characterized in that: The anti-reverse module (270) is a diode or a field effect tube.

9. The lamp according to claim 1, characterized in that It also includes a stroke detection device (280) for detecting whether the lens (120) is retracted into position, and the stroke detection device (280) is connected to the auxiliary controller (250) via a signal.

10. The lamp according to claim 9, characterized in that The stroke detection device (280) is a magnetic sensitive switch.

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