345results about How to "Reduce structural complexity" patented technology

The invention provides an insulator defect detection method GAC-YOLO based on YOLOv7, and relates to the field of identification and detection of insulator targets. Comprising the steps that a GSConv module is optimized, and the calculation amount and the memory requirement are reduced while the precision is guaranteed; an ACmix attention mechanism is introduced, convolution and self-attention are fused, the prediction ability of the model is enhanced, and then the detection effect is improved; the centralized feature pyramid is fused, information exchange and integration can be achieved through feature maps of different scales, more comprehensive insulator features are further obtained, and therefore the insulator detection precision is improved. And performing an ablation experiment on each module of the model, and performing a contrast experiment with a mainstream deep learning model to obtain a final insulator detection model. According to the model realized by the invention, on the basis of ensuring the original detection rate of the YOLOv7, the accuracy of the model in insulator defect detection is improved.

A marching assisting exoskeleton robot comprises a waist supporting structure module, a waist rod module, a joint driving module and a binding system. The waist rod module comprises two groups of waist rod module assemblies which are symmetrically arranged relative to the waist supporting structure module. According to the design scheme provided by the embodiment of the invention, parts can be changed into a whole, the structure of the whole machine is simplified, so that assembling procedures are reduced, the structural complexity can be reduced, and the stability of the machine body is improved. By applying the symmetrical telescopic adjusting module, the machine body can bring better wearing adaptability and comfort to people with different figures. Compared with an existing light walking-aiding exoskeleton robot, the light walking-aiding exoskeleton robot has the advantages of being comfortable and convenient to wear, convenient to operate, high in whole machine protection capacity and high in power-aiding capacity, and in addition, the light walking-aiding exoskeleton robot is small in size and light in mass and has high market competitiveness in exoskeleton robot products of the same type.

The utility model provides a coil panel and cooking equipment, and relates to the technical field of cooking equipment. The coil disc includes: a heat insulating member; the coil is arranged on the first side of the heat insulation part and can generate heat radiation and an electromagnetic field after being electrified, and the center of the coil comprises a receding area; the magnetic part is arranged on the second side, away from the coil, of the heat insulation part, and a protruding part is arranged on the side, facing the heat insulation part, of the magnetic part.

The invention discloses a water-air cross-medium aircraft. The water-air cross-medium aircraft comprises a driving device; a plurality of rotors; the rotor wings comprise underwater propellers and aerial propellers; one end of the underwater paddle is connected with the driving device, and the other end is connected with the aerial paddle; the air propeller can rotate relative to the underwater propeller so as to be in an unfolded state coaxial with the underwater propeller when sailing in the air and in a folded state inclined relative to the underwater propeller when sailing underwater. The underwater propellers and the air propellers are integrated together to form the rotor wing, so that the overall layout of the rotor wing is more compact, shared driving can be achieved, the rotor wing serves the air propellers and the underwater propellers, power transmission is more direct and efficient, energy loss caused by an extra transmission device is reduced, and therefore the underwater and air high-speed cruise is achieved while the energy consumption is reduced. And the size, the weight and the control complexity of the propulsion system are reduced.

The invention discloses a hydraulic reverse hitting impact power head which comprises a gearbox, a reverse hitting device and an impact device, and the reverse hitting device comprises a shell assembly, a drill rod and a reverse hitting piston. A control cavity is formed between the shell assembly and the reverse hitting piston, and a control oil way is further arranged in the shell assembly and the reverse hitting piston and connected with a high-pressure oil way and a low-pressure oil way in the impact device. The control cavity is used for forming a micro-pressure cavity when the power head works normally, and then the reverse hitting piston and the shell assembly are made to be close to the rear end side of the drill rod. The control cavity is further used for forming a high-pressure cavity only through communication between the control oil way and the high-pressure oil way in the process that the shell assembly drives the reverse hitting piston to move in the reverse direction to pull out the drill rod when the drill is stuck, then the reverse hitting piston is pushed to drive the drill rod to move in the reverse direction to pull out the drill rod, and the control cavity forms a micro-pressure cavity again when the drill rod is pulled out. According to the power head, the overall structure is simple and compact, oil is supplied from the interior of the impact device, automatic recognition and reverse hitting can be achieved when drill jamming occurs, and an energy accumulator does not need to be additionally installed.

The invention provides a mechanical locking hydraulic cylinder which comprises a cylinder barrel assembly, a motor mounting plate, a cylinder barrel, a cylinder bottom, a lead screw rotating seal, a supporting bearing pair, a sealing ring, a lead screw reducing sleeve and a bearing oil cylinder. The piston assembly comprises a piston, a first supporting ring, a piston seal and a compression nut; the guide sleeve assembly comprises a guide sleeve, a guide sleeve seal, a guide sleeve clamping ring, a guide sleeve check ring, a second supporting ring, a piston rod seal and a dustproof ring. The driving locking assembly comprises a hydraulic motor, a fixing pin, a trapezoidal pressing nut, a locking lead screw and a locking nut. The piston rod penetrates through the guide sleeve of the piston assembly to be fixed to the piston, limiting is achieved based on the cylinder barrel and the guide sleeve, an oil inlet and an oil outlet of the hydraulic cylinder supply oil to drive the piston rod to do axial telescopic motion, the hydraulic cylinder is locked at any position without an additional oil source, and the electric cylinder is low in structural complexity, good in reliability and convenient to use. Movement, hovering and locking at any position can be achieved.

The utility model relates to an injection mold for an air inlet hard pipe of an automobile engine, which comprises a movable mold assembly and a fixed mold assembly which are matched with each other and are respectively arranged front and back, and the movable mold assembly comprises a movable module, a movable core block embedded in the rear side of the movable module, a feeding block fixed on the front side of the movable module and a panel fixed on the front side of the feeding block; the fixed mold assembly comprises a fixed mold block matched with the movable mold block, a fixed core block embedded in the front side of the fixed mold block and matched with the movable core block, a seat block arranged behind the fixed core block, and an ejection mechanism arranged between the seat block and the fixed core block; a first inner core forming module and a second inner core forming module which are matched with each other are arranged between the movable module and the fixed module; according to the injection mold, the demolding difficulty is reduced, and the structural complexity of the injection mold is reduced, so that the manufacturing and assembling processes are simplified.

The invention provides vehicle measuring equipment which comprises a base assembly, a stand column assembly arranged on the base assembly, a cross beam assembly arranged on the stand column assembly, a shooting camera fixed to the cross beam assembly and a hanging assembly arranged on the cross beam assembly and used for hanging a calibration piece. The base assembly comprises a rotating mechanism capable of outputting rotating motion, the stand column assembly comprises a first stand column and a second stand column connected with the first stand column in a sliding mode, the first stand column is fixedly connected with the motion output end of the rotating mechanism, and the cross beam assembly is driven by the second stand column to ascend and descend. According to the vehicle measuring equipment provided by the invention, the cross beam assembly has a relatively large height moving stroke, and the vehicle measuring equipment can be simultaneously suitable for four-wheel positioning and ADAS calibration. The stand column assembly can rotate relative to the base assembly, so that the yaw angle of the cross beam assembly can be adjusted, and the structural complexity of other angle adjusting components is reduced.

The invention provides a DNN model-based division and reasoning acceleration method and system for vehicle-mounted edge intelligence. The method comprises the following steps: constructing a DAG graph based on a vehicle-mounted DNN model; constructing an auxiliary network flow graph of the DAG; adding a head node representing local calculation of a vehicle and a tail node representing calculation of an edge server or an auxiliary vehicle, and setting the weight of an edge as time delay overhead for segmenting the edge; obtaining different layering modes of an auxiliary network flow diagram of the DAG and corresponding maximum tolerance point sets meeting local time delay, memory and energy consumption limitation of the vehicle; correspondingly modifying the weight of the edge in the auxiliary network flow graph of the DAG based on each maximum tolerance point set, and calculating the maximum flow of each modified network flow auxiliary graph; and selecting a division mode corresponding to the maximum flow as a DNN model division mode. According to the method, the vehicle and road cloud cooperative reasoning is realized through a DNN model division mode, so that the DNN task cooperative reasoning completion time delay is reduced, and the vehicle safety and the user experience are improved.

The embodiment of the utility model relates to the technical field of electronic devices, provides a waveguide antenna, a waveguide antenna assembly, a radio frequency device, a radar and electronic equipment, and can realize signal transmission between the waveguide antenna and a chip without arranging an additional conversion structure, thereby greatly reducing the structural complexity and the production cost. The waveguide antenna comprises a plurality of waveguide interfaces arranged in an array, and the adjacent waveguide interfaces are orthogonally arranged; the waveguide interface comprises a single ridge-shaped waveguide port, and the single ridge-shaped waveguide port is used for transmitting radio frequency signals radiated and / or received by the waveguide antenna.

The invention relates to a semi-quantum mutual identity authentication method and system based on a single particle. The method comprises the following steps: determining a shared identity authentication key; the first authentication party selects a first calculation base or a second calculation base to generate a quantum bit according to the key bit value, and sends all the generated quantum bits to the second authentication party; the second authentication party measures or rearranges the received quantum bits according to the key bit value and compares the measurement result with the corresponding initial state, and if the measurement result and the corresponding initial state are the same, the first authentication party is considered to be legal; and the first authentication party receives the rearranged quantum bits and measures the quantum bits, and then compares a measurement result with a corresponding initial state, and if the measurement result is the same as the corresponding initial state, the second authentication party is considered to be legal. According to the invention, the simplicity and practicability of the quantum authentication process can be improved, and the problems of high resource consumption, dependence on a third party and incapability of identifying illegal identities in the existing scheme are effectively solved.

The embodiment of the utility model provides a battery protection board, a battery and electric equipment, and relates to the technical field of battery manufacturing, the battery protection board comprises a circuit board and a first conductive piece; the first conductive part comprises a first conductive part and a second conductive part which are obliquely connected, the first conductive part and the second conductive part are attached to the circuit board, at least one of the first conductive part and the second conductive part is electrically connected with the circuit board, and the surface, away from the circuit board, of the first conductive part is used for being electrically connected with an electric load. And the surface, deviating from the circuit board, of the second conductive part is electrically connected with an electric load. According to the embodiment of the invention, the current path is formed between the first conductive part and the electric load, an existing connector structure is replaced, and compared with the connector structure, the first conductive part is simple in structure and is attached to the battery protection plate, so that the occupied size space is relatively small, and the overall packaging size of the battery is reduced. In addition, the first conductive portion and the second conductive portion provide conductive surfaces in different directions.

The utility model provides a feeding device and assembling equipment with the same. The feeding device is used for conveying materials in a reciprocating motion mode between the distributing device and the assembling device and comprises a rack, a feeding device and a discharging device, the feeding main body comprises a clamping part used for clamping materials, and the feeding main body is arranged on the rack in a turnover mode so as to convey the materials; the separation structure is arranged on the feeding main body and provided with a plurality of separation grooves used for containing materials, the number of the separation grooves is multiple, the number of the clamping parts is multiple, and the multiple clamping parts and the multiple separation grooves are arranged in a one-to-one correspondence mode; wherein the feeding main body is provided with a clamping position and a feeding position, when the feeding main body is located at the clamping position, at least part of the clamping part is located above the separation groove, and when the feeding main body is located at the feeding position, at least part of the clamping part is located on one side of the separation groove. The feeding device effectively solves the problems that in the prior art, a feeding device of intravenous needle assembling equipment is too complex in structure, and the assembling efficiency of an intravenous needle device is affected.

The invention discloses a communication control unit and method for freely switching network searching in a dual-medium dual-mode network, and the communication unit comprises a radio frequency antenna switching circuit unit which is used for gating the connection between an antenna and a communication module; the SIM card switching circuit unit is used for gating connection between the SIM card and the communication module, and the S IM card supports a 4G dual-mode communication system; the dual-mode communication module switching enabling circuit unit is used for gating the connection between the main control MCU and the communication modules, the number of the communication modules is two, and the main control MCU is respectively in gating connection with the same SIM card and the same radio frequency antenna by gating the dual-mode communication modules through same-frequency signals; and the power management single-path auxiliary unit is used for providing power supply in the circuit. According to the invention, the problem that two or more communication modes are transversely compatible in a dual-mode communication process can be effectively solved, automatic network switching and network searching are realized under the condition that only a single radio frequency antenna and a single SIM card are used, and the self-adaptive adaptation capability of the communication unit is greatly improved.

The invention discloses a relay, which comprises a shell, a magnetic circuit part, a contact part and a pushing part, and is characterized in that the magnetic circuit part is mounted on the shell and comprises at least two magnetic circuit units; the contact part is arranged on the shell and comprises a movable spring group, a static contact group and a load terminal; the movable spring groups and the static contact groups are arranged corresponding to the magnetic circuit unit, and each movable spring group is provided with a movable contact group corresponding to the static contact group; each movable spring group and the corresponding static contact group jointly form a switch; the movable spring group and the static contact group in each switch are respectively connected with different load terminals, and at least one load terminal is shared by at least two switches and forms a common terminal; and the pushing part comprises a pushing piece accommodated in the shell, the pushing piece and the magnetic circuit unit are correspondingly arranged, and the pushing piece is driven by the corresponding magnetic circuit part to drive the corresponding movable spring group, so that the movable contact group and the corresponding static contact group are closed or opened. By adopting the technical scheme, the occupied space is smaller than that in the prior art for realizing the functions of more than two switches.

The invention discloses a double-screw compressor which comprises a shell, a first screw, a second screw, a third screw and a fourth screw, the shell is provided with an inner cavity, an air inlet and an air outlet, and the air inlet and the air outlet are communicated with the inner cavity; the at least one pair of screws are rotatably arranged in the inner cavity of the shell; and the internal volume ratio adjusting mechanism is arranged at the position, close to the exhaust port, of the shell and used for carrying out stepped adjustment on the through-flow area between the inner cavity of the shell and the exhaust port. According to the technical scheme, various working conditions of the compressor can be adapted, components such as a sliding valve are omitted, and the structural complexity and the control complexity are reduced.

The present invention belongs to the technical field of agricultural machinery, and specifically relates to a rotatable frame for agricultural machinery, including a lower walking frame, an upper working frame, a lifting structure and a rotating structure; the lower walking frame serves as a supporting structure of the rotatable frame, and its front end is connected to a traction device; the upper working frame is connected to the lifting structure, and the upper working frame is used to carry parts of the agricultural machinery; the rotating structure is arranged on the lower walking frame; the lifting structure is vertically fixed on the rotating structure; the rotating structure drives the lifting structure to rotate and then drives the upper working frame to rotate. The rotatable frame of the present invention can make the upper working frame rotate 90 degrees by lifting and rotating, so as to quickly switch between the transport state and the working state, effectively solve the problem of excessive width of agricultural machinery during transportation, improve the transportation and work efficiency of agricultural machinery, and also reduce the occupation of roads and bridges, which is beneficial to traffic safety.

The invention relates to the technical field of motors, and particularly discloses a motor rotation angle detection system and method, and the system comprises a separation blade which is provided with a spiral outer edge and linear edges connected with the two ends of the spiral outer edge; the first reflection type optocoupler is arranged on one side, deviating from the motor, of the separation blade; the controller is used for obtaining the first induction current based on the first reflection type optocoupler when the motor rotates and obtaining the rotation angle of the motor according to the first induction current and a preset conversion relation; according to the motor rotation angle detection system, a motor rotation shaft rotates to drive a separation blade to rotate synchronously, so that the coverage range of the separation blade in a first effective area is changed based on a spiral outer edge with a continuous change characteristic, and then a first reflection type optocoupler generates a first induction current with continuous change; the controller can calculate the rotation angle of the motor in real time according to the size of the first induction current, and has the advantages of being low in structural complexity and low in cost.

The embodiment of the invention provides vehicle-mounted inspection equipment and a control method thereof, and the vehicle-mounted inspection equipment comprises a drive-by-wire chassis vehicle (2) which comprises a vehicle body controller (21) and is configured to enable a vehicle to execute actions; the scanning equipment (1) comprises a control device and an automatic guiding controller (12), and the control device is configured to send a vehicle action instruction to the vehicle body controller (21), receive vehicle state information fed back by the vehicle body controller (21) and send the vehicle state information to the automatic guiding controller (12); the automatic guiding controller (12) is configured to determine steering adjustment information of the vehicle according to the vehicle state information and send the steering adjustment information to the vehicle body controller (21) through the control device to adjust the steering walking state of the vehicle.

The invention relates to a single-motor five-gear transmission electric drive axle system and a vehicle. The single-motor five-gear transmission electric drive axle system comprises a motor, a first gear shifting mechanism, a second gear shifting mechanism, a planet row assembly and three transmission gear sets. The planet row assembly comprises a sun gear, a planet gear, a planet carrier and a gear ring; the three transmission gear sets comprise a first driving gear, a first driven gear, a second driving gear, a second driven gear and a third driven gear; the motor is connected with the input shaft, and the input shaft is meshed with the normally-meshed intermediate shaft. The first driving gear and the second driving gear are sequentially arranged on the normally engaged intermediate shaft, and the first gear shifting mechanism is arranged between the first driving gear and the second driving gear; the first driven gear and the second driven gear are fixedly arranged on the sun wheel shaft, the sun wheel shaft is sleeved with the third driven gear in an empty mode, and the second gear shifting mechanism is arranged between the third driven gear and the planet row assembly; five transmission gears are formed through cooperation of the first gear shifting mechanism and the second gear shifting mechanism.

The invention discloses a control method, device and equipment of a full-automatic template sewing machine and a medium, and relates to the technical field of sewing machines. Obtaining a target expected speed of the first servo system when executing the current speed loop task according to a position instruction of the first servo system when executing the current position loop task and position feedback values of the first servo system and the second servo system when executing the current position loop task; based on a PID algorithm, according to the target expected speed and a speed feedback value when the first servo system executes the current speed loop task, obtaining a target input signal when the first servo system executes the current current loop task; and controlling the rotating speed of the first servo system by using the target input signal. According to the method, the technical problems that when the two servo systems needing to operate synchronously in the full-automatic template sewing machine are controlled, the hardware connection structure is complex, the cost input is too high, and the occupied space size is large can be solved.

The utility model provides a stone material unloading machine's board material dump receiving mechanism, including the supporting plate device, the blanking device and the broken part, the supporting plate device can lift and reciprocatingly move and suspend in the front side of stone processing position, the blanking device is arranged in the back below of supporting plate device, the broken part can lift and reciprocatingly move and be arranged in the clearance between two pieces of vertical stone board, and make the vertical stone board of processing position and the connecting part of lower end realize fracture, the supporting plate device passes through the lift and horizontal movement and will be broken stone board on stone processing position stable receiving transition to the blanking device surface, the utility model discloses a reasonable cooperation through supporting plate device and blanking device, can be stable receiving vertical state's stone board after the stone board broken, avoid directly using the sucking disc and carrying on adsorption, reduced equipment structure complexity and operation risk.

The utility model discloses a code changing structure, a lock structure and a padlock, which comprise a plurality of press keys for pressing, a locking plate matched with the press keys for locking and a lock beam connected on the locking plate, a plurality of limiting pieces capable of moving along the moving direction of the press keys are arranged on the locking plate, bulges are arranged on the side surfaces of the press keys corresponding to the positions of the limiting pieces, and the lock beam is connected with the lock beam. The limiting piece is provided with a notch used for allowing the protrusion to go in and out in a matched mode. The lock beam and the locking plate are fixedly connected in the pulling-out direction of the lock beam, and the lock beam and the locking plate are rotationally connected in the circumferential direction. And when all the keys are pressed down until the bulges correspond to the notches of the corresponding limiting pieces, the lock beam is unlocked, the lock beam is pulled out to drive the locking plate to move until at least part of the bulges enter the notches, and the keys axially move to drive the limiting pieces to move to replace the password. The complexity of a code changing structure can be simplified, the assembling cost is reduced, the occupied structural space is reduced, and the production efficiency is improved.

The present application relates to a kind of core-pulling module of plastic forming die, including inclined top module, inclined top module includes U-shaped seat block, the directional plate of transverse fixed at the top opening of U-shaped seat block, oblique square column is connected in the directional plate and is active, and the traction strip that is transverse and is arranged in the inside of U-shaped seat block to have front and rear translation function and is connected with the lower end of oblique square column;Inclined top module further includes rotatable connection in the inside rear side of U-shaped seat block transmission gear and rotatable connection in the inside of U-shaped seat block and meshing in the front upper of transmission gear reversing gear;Inclined top module further includes vertical arrangement and meshing in the rear of transmission gear driving rack;The present application reduces both the complexity of the structure of mould, and the processing and manufacturing difficulty of mould, to reach the effect of time-saving and labor-saving and reduce manufacturing cost.

The invention discloses an antenna and terminal equipment, the antenna comprises a first radiator and at least one second radiator, and the first radiator generates a first resonant frequency; each of the at least one second radiator and the first radiator are arranged in an outer shell and are coupled in a suspended manner to form resonance, the at least one second radiator and the first radiator resonate to generate at least one second resonant frequency, and the second resonant frequency is different from the first resonant frequency. According to the embodiment of the invention, the second radiating body which is suspended relative to the first radiating body is adopted, so that the structural complexity of the first radiating body can be reduced, and the processing difficulty of the first radiating body is reduced; the first radiating body generates the first resonant frequency, and the second radiating body and the first radiating body generate the second resonant frequency, so that multiple functions of the antenna can be conveniently realized, the antenna performance is improved, and the application range is widened.

The utility model relates to alumina microsphere preparation technical field, concretely relates to a kind of preparation device of hundred-micron alumina microsphere, including feeding device, with the feeding pipe of feeding device connection, still including heating kettle, solvent cylinder being set in heating kettle, rotating shaft being rotationally arranged in solvent cylinder, rotating cavity being set in the lower end of rotating shaft and located in solvent cylinder, multiple micropore tubes being annularly arranged on rotating cavity, stirring paddle being set in the lower end of rotating cavity, servo motor being set in the upper end of heating kettle;The upper end of heating kettle is provided with the jack for the insertion of solvent cylinder, the rotating shaft is rotationally arranged in the upper side of heating kettle and is drivingly connected with servo motor, the upper end of rotating shaft is connected with feeding pipe, and the lower end is inserted in solvent cylinder.This device preparation hundred-micron alumina microsphere's specific surface area is large, and particle size is uniform, and equipment structure is not complex, easy to operate, and low in cost.

This invention discloses a carbon fiber composite material with in-situ monitoring and self-healing functions and its preparation method. The carbon fiber composite material includes a carbon fiber reinforcement and a functional resin matrix impregnated and cured within the carbon fiber reinforcement. The functional resin matrix is ​​formed from epoxy resin, a fatty amine curing agent, a photoresponsive self-healing agent, lamellar boron nitride nanoparticles, a dispersant, and a composite photoinitiator. The photoresponsive self-healing agent retains at least a portion of its photopolymerizable state under 365nm ultraviolet light. During preparation, lamellar boron nitride nanoparticles are first dispersed in epoxy resin, then the photoresponsive self-healing agent and composite photoinitiator are added, followed by the addition of the fatty amine curing agent, and the carbon fiber fabric is vacuum impregnated and cured at room temperature or low temperature. In use, the crack damage area is determined based on the change in 365nm transmittance relative to a reference value, and the self-healing agent polymerization is initiated by targeted irradiation with 365nm ultraviolet light. The lamellar boron nitride nanoparticles enhance the thermal conductivity and interfacial bonding of the repair area. This invention can achieve damage localization and in-situ repair without the need for implanted sensors and is applicable to carbon fiber reinforced composite material structures.

This invention provides an ink mixing device for a packaging box printing machine, relating to the field of ink processing technology. The ink mixing device for the packaging box printing machine includes a mixing tank and a bottom tank; it also includes a drive motor, the output end of which is connected to a pressing mechanism and a reciprocating mechanism. The pressing end of the pressing mechanism is connected to a piston, which moves within a metering mechanism. An adjustment mechanism for metering is also provided on the outside of the metering mechanism. Inside the mixing tank, a stirring assembly and a scraper are provided for ink mixing. The stirring assembly and scraper are driven by the drive motor. The reciprocating end of the reciprocating mechanism is connected to a scraper ring for scraping the inner wall of the mixing tank. This invention achieves coordinated operation of metered ink delivery, efficient mixing, and automatic tank wall cleaning by simultaneously driving the pressing mechanism, stirring assembly, and reciprocating mechanism with a single drive motor, effectively reducing equipment energy consumption and structural complexity.

The invention relates to a rotating shaft assembly, a grounding part and electronic equipment, the rotating shaft assembly comprises a rotating shaft and the grounding part, the grounding part is arranged between the rotating shaft and a rotating shaft back cover in the electronic equipment and is electrically connected with the rotating shaft back cover and the rotating shaft to form a grounding circuit, and the grounding part comprises a voltage limiting element. When the voltage in the grounding circuit is greater than or equal to a first threshold value of the voltage limiting element, the voltage limiting element conducts the grounding circuit; when the voltage in the grounding circuit is smaller than the first threshold value of the voltage limiting element, the voltage limiting element disconnects the grounding circuit. The rotating shaft assembly is simple in structure, easy to manufacture and low in cost, the ESD grounding requirement of the rotating shaft back cover and the daily use requirement of a user can be met at the same time, the service life of a metal appearance part outside the electronic equipment is prolonged, and the use safety of the electronic equipment is improved.

The utility model is suitable for the technical field of lighting equipment, and provides a lighting device and a panel lamp. The lighting device comprises a light-emitting part used for emitting a lighting beam; the reflection cup is arranged on one side of the light-emitting part and used for receiving the illumination light beam and adjusting the illumination light beam into a collimated light beam; the electronic atomization piece is fixed to the side, away from the light-emitting part, of the reflection cup and used for receiving the collimated light beam and adjusting the collimated light beam into an emergent light beam, and the transparency of the electronic atomization piece can be adjusted so that the light beam angle of the emergent light beam can be adjusted. According to the lighting device, the beam angle of the emitted beam can be adjusted under the condition that the electronic atomization sheet does not need to be driven to move, the effects of reducing the structural complexity and reducing the cost and weight are achieved, and production and use are facilitated.