33results about How to "Realize power on and off" patented technology

The invention discloses a power supply stable on-off control circuit and method used in a sea surface floating device. The circuit comprises a switching unit, the input end of the switching unit is connected with a power supply, the output end of the switching unit is connected with the input end of a voltage stabilizing conversion circuit, and the output end of the voltage stabilizing conversion circuit is connected with a microcontroller and other electricity utilization units of the device. The switching unit is composed of a gravity switch and an electronic switch which are connected in parallel. The microcontroller detects on-off of the gravity switch through a detection circuit and controls on-off of the electronic switch through a driving circuit. According to the control circuit and method, the device is electrified when being vertically arranged in a positive mode and is powered off when being vertically arranged in an inverted mode by exceeding a certain time, on-off of the device can be conveniently achieved, and in addition, the situation that an interface is additionally arranged and consequently, the sealing performance of a shell of the device is damaged is avoided.

The invention relates to a vehicular fuel cell energy distribution management control device. The vehicular fuel cell energy distribution management control device comprises a processor, a power source module, a vehicular bus communication module, a current collector, a voltage collector and a driver; the power source module is connected with the processor; the vehicular bus communication module is connected with the processor and used for data receiving and sending; the output end of the current collector is connected with the processor, and the input end of the current collector is connectedwith a dynamic bus for collecting the current of the dynamic bus; the output end of the voltage collector is connected with the processor, and the input end of the voltage collector is connected withthe dynamic bus for collecting the voltage of the dynamic bus; and one end of the driver is connected with the processor, and the other end of the driver is connected with contactors and relays in anenergy distribution system. Compared with the prior art, a bus is in communication with a fuel cell engine controller FCU so that the functions such as power-on and power-off, load voltage and current monitoring and failure detection and reporting of electrical appliances can be achieved.

The invention relates to the film preparation technology field and discloses a corona processor. A machine body is included. A corona device is fixedly installed in a middle portion of a top of the machine body. A corona roller is movably installed below the corona device. A fan is fixedly installed on one side of the top of the machine body. A high-voltage transformer is arranged at a bottom of the machine body. A controller is arranged on a front surface of the machine body, a plurality of conveying rollers for conveying thin films are arranged on two sides of the corona roller, the corona device is provided with an installation block, the bottom of the installation block is connected with a plurality of electrodes through a spring, the corona roller is symmetrically and movably connected with two movable sleeve rings, and the bottoms of the movable sleeve rings are movably connected with moving devices. By using the corona processor, the multiple electrodes are arranged and can be adjusted, redundant ozone and heat are reduced, a utilization rate is increased, a working range can be adjusted according to a specific film, the corona device is tightly attached, an ozone concentration during working can be ensured to be optimal, and a corona effect is good.

The invention provides a method for recovering vibration energy of rear axle of an electric automobile. The method for recovering the vibration energy of the rear axle of the electric automobile comprises the steps of mounting a hydraulic cylinder between a frame and the rear axle of the electric automobile in a floating manner; forming a first oil port in a cavity, without a rod, of the hydrauliccylinder; forming a second oil port is in a cavity, with a rod, of the hydraulic cylinder; connecting an electromagnetic valve set to the first oil port and the second oil port; measuring a distancebetween the frame and the rear axle to obtain distance data; setting a time interval; when a distance measured within the time interval is reduced in the electric automobile running process, enablinghydraulic oil in the cavity without the rod to be drained into an oil tank via the first oil port, the electromagnetic valve set and a power generator by controlling the electromagnetic valve set; when the distance measured within the time interval is increased, enabling hydraulic oil in the cavity without the rod to be drained to the oil tank via the second oil port, the electromagnetic valve setand the power generator by controlling the electromagnetic valve set; and using the power generator to generate power and storing electric energy into a storage battery of the electric automobile. Byusing the method for recovering the vibration energy of the rear axle of the electric automobile, higher electric energy conversion efficiency is realized.

The invention discloses a contact monitoring device of a high-voltage direct-current relay. The contact monitoring device comprises the high-voltage direct-current relay, a working circuit and a contact detection mechanism; the contact detection mechanism is arranged below the high-voltage direct-current relay; one end of the bottom of the high-voltage direct-current relay is connected with the working circuit; the high-voltage direct-current relay comprises a shell, a coil, an iron core, an elastic element, a movable contact platform, a circuit board and two load terminals; and the contact detection mechanism comprises a signal circuit and a conductive spring piece. A push rod is driven by lifting the iron core to push the conductive spring piece to rise, so that the iron core drives theconductive spring piece to be in contact with a connecting terminal while moving, and then the signal circuit is turned on; and a working state of the device is monitored through an indicating lamp state of the signal circuit, and whether the two load terminals are truly closed or not is known in real time, so that the time for overhauling and fault checking after power failure of the high-voltagedirect-current relay is shortened, and the labor maintenance cost is effectively reduced.

The invention discloses a rotating socket. The socket includes a rotating socket body, wherein the rotating socket body is provided with a live wire connecting copper conductor and a zero wire connecting copper conductor and a ground connecting copper conductor, the live wire connecting copper conductor and the zero wire connecting copper conductor are rotatable rotating rods, and the ground connecting copper conductor is an elastic telescopic conductor; a two-plug anti-electric shock protection door and a three-plug anti-electric shock protection door are embedded in a shell and are fixed bya protective door stabilizer device; an L-class live wire conductor copper rod, an N-class zero wire conductor copper rod, and an E-level ground conductor copper rod are embedded and assembled insidea socket base; and a socket copper piece L-class live wire, a socket copper piece N-class zero wire, and a socket copper piece E-class ground wire are fixed on the socket base, and when the rotating socket is rotated to two gear switching based on track housing horizontal line 45-90 degrees, power-on / power-off power of the rotating socket can be achieved, fixation of the rotating socket based on atrack housing is not affected, and the socket substitutes a mechanical switch.

The invention discloses a field tobacco growth information sensing system based on the Internet of Things. The system is characterized by comprising a control processing module, an information sensing module, a wireless communication module, a power supply module and an upper computer, wherein the information sensing module is connected with the control processing module; the control processing module is connected with the upper computer through the wireless communication module; the power supply module is used for supplying a working electric source to the control processing module and the wireless communication module; the control processing module comprises a micro-processor, a data collection module, a signal conversion module and a solid-state relay control circuit; the information sensing module comprises video monitor equipment and a sensor. According to the field tobacco growth information sensing system, the field tobacco growth information can be monitored in an intelligent manner, and a user can detect the field tobacco growth information at any time by virtue of the system, so that the production efficiency is improved, and the labor force is saved.

The invention discloses an enable-control circuit, which comprises a first level adjusting module, a second level adjusting module and a switching module. The switch module is connected with the enable input terminal of the VR circuit of the board through a flying wire. The switch module is connected with the enable input terminal of the VR circuit of the board through a flying wire. One end of the first level adjusting module is connected with the switching module, and the other end is grounded for controlling the input level of the enabling input terminal to be changed from a high level to alow level when the switching module controls the enabling input terminal to be connected with the first level adjusting module; one end of the second level adjusting module is connected with the switching module, and the other end is connected with the pull-up power supply of the board, which is used for controlling the input level of the enable input terminal to be changed from the low level tothe high level when the switching module controls the enable input terminal to be connected with the second level adjusting module. Thus, in the technical proposal disclosed in the present application, the operation of removing the resistor R13 is canceled, and only the flying wire used for welding is required, the operation time is short, and the damage to the board is largely avoided.

The present invention relates to a flat plate switch capable of fully reset. The switch includes a button, a slider, a surface frame, a middle frame, and an on-off reset mechanism, the on-off reset mechanism is installed on the middle frame, the middle frame is disposed at the back of the surface frame so as to locate the on-off reset mechanism within a reset mechanism hole, an auxiliary button key is disposed at the surface of the surface frame, the auxiliary button key is rotationally connected with the surface of the surface frame, the auxiliary button key is distributed on the whole surface of the surface frame, the auxiliary button key is located at an outer side of the surface of the on-off reset mechanism, the auxiliary button key is rotated by the extrusion of the button, the auxiliary button key triggers the on-off reset mechanism to act, after the action of the on-off reset mechanism, the auxiliary button key and the button are reset by an elastic force of the reset mechanism. The present invention has a simple and reasonable structure design, by adding one auxiliary button key between the button and the surface frame, can achieve a big flat plate typed button, can omit one frame, and by triggering any part of the surface of the button, can trigger the on-off reset mechanism to act, thereby achieving on-off of a power source. The action of the button is flexible and reliable.

The invention discloses a power supply stable on-off control circuit and method used in a sea surface floating device. The circuit comprises a switching unit, the input end of the switching unit is connected with a power supply, the output end of the switching unit is connected with the input end of a voltage stabilizing conversion circuit, and the output end of the voltage stabilizing conversion circuit is connected with a microcontroller and other electricity utilization units of the device. The switching unit is composed of a gravity switch and an electronic switch which are connected in parallel. The microcontroller detects on-off of the gravity switch through a detection circuit and controls on-off of the electronic switch through a driving circuit. According to the control circuit and method, the device is electrified when being vertically arranged in a positive mode and is powered off when being vertically arranged in an inverted mode by exceeding a certain time, on-off of the device can be conveniently achieved, and in addition, the situation that an interface is additionally arranged and consequently, the sealing performance of a shell of the device is damaged is avoided.

The invention discloses a belt-load testing device used by a clutch electronic control pneumatic separating mechanism. The electromagnetic valve is located on the side surface of the power assisting cylinder, the center line of the power assisting cylinder is consistent with the center line of the combined support, the supporting frame is located on the base, an l-shaped bracket, a rotating shaftsupporting frame and a disc type mechanism fixing disc are sequentially arranged on one side of the base from one side of the base, the axis of the rotating shaft supporting frame is perpendicular tothe center line of the power assisting cylinder, the center line of the fixed disc of the disc-type mechanism is consistent with the center line of the combined bracket, the central line of the largehole in the fixed disc is consistent with the symmetric line of the thickness of the pull arm, the two sides of the l-shaped supporting frame are respectively provided with a special-shaped support and an electromagnetic valve of the power-assisted cylinder, the rotating shaft of the rotating shaft supporting frame penetrates through the front T-shaped bracket on one side in sequence, and the special-shaped support forms a rotary shaft end face shaft and is connected with a swing arm of the pneumatic separation mechanism. The loading testing device is used for the electric control pneumatic separating mechanism, so that the on-off of the electromagnetic valve is realized, and the test function of the on-off gas of the power-assisted cylinder is controlled.

The invention discloses an intelligent desk with a wireless charge function. The intelligent desk mainly comprises a desk and a wireless charge transmitting device. The wireless charge transmitting device is movably arranged on the desk, the desk is provided with a first location and a second location, the movement range of the wireless charge transmitting device includes the first location and the second location, the wireless charge transmitting device comprises a charge circuit, the charge circuit is provided with a first electromagnetic switch, a first magnet is arranged at the first location of the desk, and the first electromagnetic switch corresponds to the first magnet when the wireless charge transmitting device is positioned at the first location. The intelligent desk has the advantage that electronic equipment such as mobile phones can be conveniently wirelessly charged by the intelligent desk.

The invention discloses an intelligent control device and method for three-phase alternating current. The device comprises a controller, a voltage sampling module, a current sampling module, an electric leakage protection module and a relay, wherein the voltage sampling module, the current sampling module and the electric leakage protection module are independently connected with the signal collection end of the controller; the input end of the relay is connected with the output end of the controller; the output end of the relay is connected with electrical equipment and a three-phase power supply in series; the voltage sampling module is used for collecting the voltage value of a power supply input end; the current sampling module is used for collecting the current value, which passes through a current transformer, of the power supply input end; the electric leakage protection module is used for collecting the electric leakage current signal of the power supply input end; and the controller controls the relay to be started and shut down according to the voltage value, the current value and the electric leakage current signal. The intelligent control device and method for the three-phase alternating current has the advantage of being high in safety.

The invention discloses a direct-current intelligent control device and method. The device comprises a controller, a voltage sampling module, a current sampling module and a relay; the voltage sampling module and the current sampling module are connected with the signal acquisition end of the controller; the input end of the relay is connected with the output end of the controller, and the outputend of the relay is connected with electrical equipment and a direct-current power supply in series; the voltage sampling module is used for acquiring a voltage value of the input end of the power supply; the current sampling module is used for acquiring a value of a current, passing through a measuring resistor, of the input end of the power supply; and the controller controls opening and closingof the relay according to the voltage value and the current value. The direct-current intelligent control device and method provided by the invention has the advantage of being high in safety.

The invention discloses a direct-current intelligent control device and method. The device comprises a controller, a voltage sampling module, a current sampling module and a relay; the voltage sampling module and the current sampling module are connected with the signal acquisition end of the controller; the input end of the relay is connected with the output end of the controller, and the outputend of the relay is connected with electrical equipment and a direct-current power supply in series; the voltage sampling module is used for acquiring a voltage value of the input end of the power supply; the current sampling module is used for acquiring a value of a current, passing through a measuring resistor, of the input end of the power supply; and the controller controls opening and closingof the relay according to the voltage value and the current value. The direct-current intelligent control device and method provided by the invention has the advantage of being high in safety.

The invention discloses a cosmetic mirror with a holding structure. The cosmetic mirror comprises a cosmetic mirror body and a mirror rod (42) matched with the cosmetic mirror body, the cosmetic mirror body comprises a back shell (10), a mirror body and a control system, the mirror body and the control system are both installed on the back shell (10), a back groove (44) is further formed in the opposite side where the mirror body is installed on the back shell (10), and the mirror rod (42) is installed on the back groove (44) through a hinge (37). The defect that in the prior art, a cosmetic mirror with a light source is poor in light source quality or uneven in light can be overcome. According to the cosmetic mirror, the special light source mirror body structure design is adopted, a circuit structure used for light source control is combined, light homogenization can be achieved, the light quality is effectively improved, meanwhile, after the mirror rod is connected with the cosmeticmirror body, multi-angle pitching operation of the cosmetic mirror body can be achieved, and therefore multi-angle observation of a user is facilitated.

The invention provides a management method for charging piles of parking spaces of new energy vehicles, which is applied in the technical field of new energy vehicles. The management steps of the management method of the charging piles of parking spaces of new energy vehicles are as follows: a charging plug (7) is inserted into a charging hole (3), and the charging plug (7) is inserted and connected with a charging socket (4); The card reader (10) reads out the unlocking information of the unlocking card (12), feeds back a signal to a control unit (11), and the control unit (11) controls the electronic switch (9) to be connected according to the signal. After charging is complete, Pull off charging plug (7), An infrared sensor (13) feeds back a signal to a control unit (11), The control unit (11) controls the electronic switch (9) to be turned off according to the signal. The management method for the charging pile of the parking space of the new energy vehicle can effectively controlthe electric energy loss of the charging pile, ensure that the electric energy of the charging pile is not used by others at will, and is suitable for intelligent management of the charging pile of the public parking space.

The invention relates to the technical field of refrigerators, and discloses an automatic detection device for preventing stalling of a compressor of a refrigerator. The automatic detection device comprises a box body, switch mechanisms are fixedly connected to the two sides in the box body, time delay mechanisms are movably connected to the inner sides of the switch mechanisms, and buckling mechanisms are movably connected to the inner sides of the time delay mechanisms; and the top of the buckling mechanism is fixedly connected with a warning mechanism, and the top in the box body is fixedly connected with a detection mechanism. According to the automatic detection device for preventing stalling of the compressor of the refrigerator, an on-off mechanism and the time delay mechanisms are triggered through the switching mechanism, the buckling mechanisms are triggered in the moving process of the time delay mechanisms, the starting of a detection function is achieved, starting current is filtered, the equipment detection precision is improved, and the detection mechanism is released in the moving process of the buckling mechanisms; and the locked-rotor current detection function is achieved, equipment locked-rotor and resource waste are prevented, the warning mechanism is triggered in the moving process of the detection mechanism, the automatic alarm reminding function of the equipment is achieved, and the equipment safety is improved.

The invention relates to the technical field of film preparation, and discloses a corona treatment machine, including a machine body, a corona device is fixedly installed in the middle of the top of the machine body, a corona roller is movably installed under the corona device, and one side of the top of the machine body is fixed A fan is installed, a high-voltage transformer is arranged at the bottom of the body, a controller is arranged on the front of the body, a plurality of conveying rollers for conveying film are arranged on both sides of the corona roller, and the corona device is provided with a mounting block, and the mounting block The bottom is connected with a plurality of electrodes through springs, and two moving collars are symmetrically and movably sleeved on the corona roller, and a moving device is movably connected to the bottom of the moving collars. The corona treatment machine can be adjusted by setting multiple electrodes, which reduces excess ozone and heat, improves the utilization rate, and can adjust the working range according to the specific film. To achieve the best, the corona effect is good.

The invention discloses a fingerprint identification car starting and flameout device and a control method thereof. The fingerprint identification car starting and flameout device comprises a fingerprint collecting sensor, a communication interface circuit, a central processor, a steering wheel unlocking unit, an electrostriction device and a circulating button switch. The fingerprint collecting sensor is connected with the central processor through the communication interface circuit. The central processor controls the steering wheel unlocking unit and the electrostriction device which controls the circulating button switch. The circulating button switch controls an engine and electrical appliances in a car. By means of the fingerprint identification car starting and flameout device and the control method thereof, keyless-starting of the car and keyless control over power-on and power-off of a car circuit are realized, and car control convenience and car safety and burglary prevention are greatly improved. Identities are recognized through fingerprints, the burglary risk of the car is greatly lowered, and the safety and burglary prevention are improved; and unlocking can be conducted only after fingerprint comparison succeeds, and thus misoperation can be prevented and reliability is improved.

The invention discloses a single-phase alternating current intelligent control device and a single-phase alternating current intelligent control method. The single-phase alternating current intelligent control device comprises a controller, a voltage sampling module, a current sampling module, an electric leakage protection module and a relay, wherein the voltage sampling module, the current sampling module and the electric leakage protection module are connected with a signal acquisition end of the controller respectively, an input end of the relay is connected with an output end of the controller, an output end of the relay is connected in series with electrical equipment and a single-phase power supply, the voltage sampling module is used for acquiring a voltage value of a power supplyinput end, the current sampling module is used for acquiring a value of a current, passing through a current transformer, of the power supply input end, the electric leakage protection module is usedfor acquiring a leakage current signal of the power supply input end, and the controller controls the on and off of the relay according to the voltage value, the current value and the leakage currentsignal. The single-phase alternating current intelligent control device and the single-phase alternating current intelligent control method provided by the invention have the advantage of high security.

The invention relates to a flatness detection device for building wood processing and relates to the technical field of building wood. The device comprises a fixed seat; the inner wall of the top of the fixed seat is fixedly connected with a first electromagnet; the inner top wall of the fixed seat is fixedly connected with a first magnetic rod; the bottom of the first magnetic rod is fixedly connected with a movable block; the inner wall of the top of the movable block is fixedly connected with a magnetism isolating plate; the inner wall of the left side of the movable block is fixedly connected with two symmetrical positive pole plates; and the inner wall of the right side of the movable block is fixedly connected with two symmetrical negative pole plates. According to the flatness detection device for building wood processing, through cooperative use of a dielectric plate and a resistor, when wood is uneven, a telescopic block moves up and down under the action of a spring, and the dielectric plate changes the relative area of the positive pole plates and the negative pole plates, so that the circuit voltage passing through the negative pole plates is changed; and therefore, the on-off of the resistor is realized, the real-time control effect is achieved, the practicability is improved, and meanwhile, the production efficiency is also improved.

The invention discloses a single-phase alternating current intelligent control device and a single-phase alternating current intelligent control method. The single-phase alternating current intelligent control device comprises a controller, a voltage sampling module, a current sampling module, an electric leakage protection module and a relay, wherein the voltage sampling module, the current sampling module and the electric leakage protection module are connected with a signal acquisition end of the controller respectively, an input end of the relay is connected with an output end of the controller, an output end of the relay is connected in series with electrical equipment and a single-phase power supply, the voltage sampling module is used for acquiring a voltage value of a power supplyinput end, the current sampling module is used for acquiring a value of a current, passing through a current transformer, of the power supply input end, the electric leakage protection module is usedfor acquiring a leakage current signal of the power supply input end, and the controller controls the on and off of the relay according to the voltage value, the current value and the leakage currentsignal. The single-phase alternating current intelligent control device and the single-phase alternating current intelligent control method provided by the invention have the advantage of high security.

The invention relates to an environment-friendly coating stirring device with an adjustable stirring diameter, and relates to the technical field of environmental protection. The device comprises a fixed rod, an electromagnet I is fixedly connected to the inner wall of the right side of the fixed rod, a resistor is fixedly connected to the inner wall of the top of the fixed rod, and a movable groove is formed in the inner wall of the fixed rod and close to the left side of the electromagnet I, a spring I is fixedly connected to the inner wall of the movable groove, the left side of the spring I is fixedly connected with a movable rod, the inner wall of the movable rod is fixedly connected with a magnetic conductive block, and a damping hole I is formed in the inner wall of the movable rod and close to the outer side of the magnetic conductive block. According to the environment-friendly coating stirring device with an adjustable stirring diameter, through the cooperative use of a fixed rod and a movable rod, in the rotating stirring process of the fixed rod, the movable rod can achieve continuous telescopic movement under the action of centrifugal force and a first electromagnet, therefore the effect of continuously changing the stirring radius is effectively achieved; the raw materials in a stirring barrel are fully stirred, so that a full mixing effect is realized, and the practicability is improved.

The invention discloses a cosmetic mirror adopting multi-contact control. The cosmetic mirror comprises a back shell, a cosmetic mirror body, a control circuit board, a battery and a controller adopting a touch control mode or an infrared control mode, the cosmetic mirror body, the control circuit board and the battery are installed on the back shell in a matched mode, and the controller is also installed on the back shell and controls the light emitting intensity of the cosmetic mirror body or / and on-off of power supply of the cosmetic mirror body. The infrared control mode controller comprises an infrared PCB, a light-transmitting plate and a light-blocking silica gel sheet which are arranged in sequence, the infrared PCB is arranged at a hole reserved in the back shell, and an infraredtransmitter and an infrared receiver are further arranged on the infrared PCB; a special light source mirror body structure design is adopted, and a circuit structure for light source control is combined, so that light homogenization can be realized, and the light quality is effectively improved; and an infrared or touch control mode is adopted, so that the cosmetic mirror can be turned on and off, the brightness can be adjusted, great convenience is brought to a user, and the user experience is effectively improved.

The invention discloses an intelligent control device and method for three-phase alternating current. The device comprises a controller, a voltage sampling module, a current sampling module, an electric leakage protection module and a relay, wherein the voltage sampling module, the current sampling module and the electric leakage protection module are independently connected with the signal collection end of the controller; the input end of the relay is connected with the output end of the controller; the output end of the relay is connected with electrical equipment and a three-phase power supply in series; the voltage sampling module is used for collecting the voltage value of a power supply input end; the current sampling module is used for collecting the current value, which passes through a current transformer, of the power supply input end; the electric leakage protection module is used for collecting the electric leakage current signal of the power supply input end; and the controller controls the relay to be started and shut down according to the voltage value, the current value and the electric leakage current signal. The intelligent control device and method for the three-phase alternating current has the advantage of being high in safety.

The invention provides a management device for charging piles in parking spaces of new energy vehicles, which is applied in the technical field of new energy vehicles, the charging socket (4) on the charging pile (2) of the charging pile management device for a parking space of a new energy vehicle is connected with a power supply through a connection line (8), An electronic switch (9) is arrangedon the connecting line (8), A card reader (10) and an electronic switch (9) are respectively connected with a control unit (11), A management device for charging piles in a parking space of a new energy vehicle further comprise an unlocking card (12), An infrared sensor (13), An infrared sensor (13) is provided in the groove (14), The infrared sensor (13) is connected with the control part (11).The management device for the charging pile of the parking space of the new energy vehicle can effectively ensure that other vehicles cannot be charged in the parking space of the parking space owner,ensure that the electricity of the charging pile will not be used by others at will, and is effectively applied to the intelligent management of the charging pile of the public parking space.

A double-ended lamp holder comprises a main body framework, an outer shell covering the main body framework and an upper cover pivotally connected with the main body framework, wherein the front end of the main body framework comprises an accommodating groove provided with a pair of circular holes at the bottom, the circular holes accommodate springs, the accommodating groove accommodates a pressing block, and the spring abuts against the bottom surface of the pressing block, a pressing clip for being connected with filaments is fixed on the pressing block, the rear end of the main body framework is provided with a first clamping groove and a second clamping groove, the first clamping groove is provided with a first clamping clip, the second clamping groove is provided with a second clamping clip, a tab is arranged in the upper cover, and when the upper cover rotates towards the main body framework, the tab is connected with the first clamping clip and the second clamping clip. The invention provides a double-ended lamp holder power-on interlocking protection function. The first lamp holder can control the power-on and power-off of the second lamp holder, and the second lamp holdercan also control the power-on and power-off of the first lamp holder, so that the lamp is safe and reliable in power-off even when the filament is taken out in the power-on state of the lamp.