75results about How to "Stay stable" patented technology

A dedicated control signal electrode is provided between pixel electrodes, and a strong electric field is generated between the control signal electrode and the common electrode to quickly and securely make an initial transition from liquid crystal molecules in a splay alignment state to the same in a bend alignment state. In addition, generating a strong electric field between the control signal electrode and the common electrode even during operation for displaying an image makes liquid crystal molecules stably stay in a bend alignment state. In this case the scan signal electrode, the video signal electrode and the common electrode, which are required for displaying an image, are not used to make a transition from liquid crystal molecules in a splay alignment state to the same in a bend alignment state and make the same stay in a bend alignment state.

An eddy carrier type wind power collection device includes a floating body and two air guiding tubes. The floating body including a compartment filled with an uprising gas having a density lower than that of air. The floating body includes a wind shear portion. The floating body further includes a floating assembly for controlling the pressure and temperature of the uprising gas. The air guiding tubes extend through the compartment of the floating body. Each air guiding tube has an air inlet and an air outlet. The air outlet includes a peripheral wall having a windward section and a guiding section. The peripheral wall of the air outlet has a cutout portion formed between the windward section and the guiding section. An air channel is formed between and in communication with the air inlet and the air outlet. A wind power generating assembly is mounted in each air channel.

The invention belongs to the technical field of nanometer materials preparation with a novel function, and especially relates to a method for preparing surface modification oil solubility nanometer copper. The method comprises the following steps: taking copper alloy as raw material; adding organic solvent with modifier, adding acid or alkaline solution which can react with the alloy metal, fully reacting for 6-24h under the temperature of 0-100 DEG C, separating and purifying to obtain the surface modification oil solubility nanometer copper. The preparation method in the invention has simple process and equipment, easily obtained raw materials in cheap price, low cost, high yield and the like, which is applicable to large-scale industrial production.

The invention discloses a technology for baking and grinding high-moisture chalk through a vertical mill and belongs to the field of cement raw materials prepared by adopting high-moisture chalk raw materials. Clammy chalk with the moisture more than 25% is fed onto an inner refiner plate of the vertical mill from a feeding mouth of the vertical mill; hot wind passes through a wind chamber, a wind ring and a chamber above the refiner plate from a hot wind inlet and discharges out of the vertical mill from a hot wind outlet; zone control is performed on the moisture of materials inside the mill; the moisture of the materials is dried step by step; a powder selecting machine, the feeding mouth and the hot wind outlet are arranged at the upper part of the vertical mill; the refiner plate and mill grinding rollers are arranged inside the vertical mill; a cloth scraping plate is arranged above the refiner plate; a retaining ring is arranged at the edge of the refiner plate; the height of the retaining ring exceeds 150 mm; the wind chamber is arranged below the refiner plate; the wind chamber is communicated with the chamber above the refiner plate through the wind ring; the hot wind inlet of the mill, a material scraping device and a feeding back port are arranged in the wind chamber, the feeding back port is connected with the feeding mouth through an outer circulating system of the mill. The invention provides a simpler and energy-saving preparation technology and device for preparing the cement raw materials by adopting the high-moisture chalk raw materials.

The invention relates to a double-oil cylinder synchronous system for a bridge detection operation vehicle; the double-oil cylinder synchronous system at least comprises two drive oil cylinders, a balancing valve and two one-way back pressure valves for independently adjusting the back pressure, wherein each drive oil cylinder is a double-acting cylinder, and the two ends of the drive oil cylinder are respectively hinged with a fixed seat and a working platform with one U-shaped section; the two drive oil cylinders and oil ways thereof are connected in parallel; the one-way back pressure valves are respectively connected between rod cavity oil ports of the two drive oil cylinders and a working oil port of the balancing valve or are connected between the rod cavity oil ports of the two drive oil cylinders and a directional valve under the condition of not passing through the balancing valve; and after being intersected, rodless cavity oil ways of the two drive oil cylinders are respectively connected with another working oil port of the balancing valve. A substitute of each one-way back pressure valve is a one-way back pressure valve bank for independently adjusting the back pressure. The double-oil cylinder synchronous system has the beneficial effects that the creeping phenomenon of the working platform when the balancing valve is independently used can be avoided; compared with a closed-loop synchronous control and dynamic balancing valve and other schemes, the double-oil cylinder synchronous system has better economic effect; the synchronism of the oil cylinders at the two sides can be realized; and the damage caused by impact or asynchronism to the working platform can be effectively avoided.

The invention relates to the field of hydraulic machinery, in particular to an operation-condition-adjustable water-jet propulsion pump. The water-jet propulsion pump comprises a pump body, wherein an impeller which is fixed on a pump shaft is arranged in the pump body; the side, close to the outlet of the pump body, of the impeller is provided with a flow guiding component; and the position of the flow guiding component is adjustable along the water flow direction. A flow guiding component in a water-jet propulsion pump with a traditional structure is fixed, while according to the operation-condition-adjustable water-jet propulsion pump, the flow guiding component is innovatively arranged to be movable along the direction of the pump shaft, so that when the flow guiding component moves, the distance between the flow guiding component and the pump body, namely a nozzle changes, and therefore the flow parameter adjustment of the pump is realized; furthermore, when the flow guiding component is located at different axial positions, the distances between the flow guiding component and the pump body, namely the nozzle are different, so that control on operation parameters of the pump can be realized by adjusting the positions of the flow guiding components; and therefore, the pump operates at optimum working conditions, and the aim of improving the propulsion efficiency of the pump is finally achieved.

The invention discloses a longitudinal back and forth movement type material conveying device, and relates to the technical field of material transportation. The longitudinal back and forth movement type material conveying device comprises a main frame, wherein a traction mechanism, a driving mechanism, a stabilizing mechanism, a transmission mechanism and a supporting mechanism are arranged on the main frame; a base is fixedly arranged at the bottom of the main frame; six sets of brake wheels are movably arranged at the bottom of the base; a supporting column is fixedly arranged between the top of the inner side of the main frame and the top of the base; and two sets of bearing frames are arranged at one side of the main frame. According to the longitudinal back-and-forth movement type material conveying device, one-up and one-down twice transportation operation can be conducted at the same time at a time, the labor burden of operators is relieved, the practicability of the device and the production and machining efficiency of factories are improved, the device can be conveniently moved or fixed to any place and has high stability and flexibility, various requirements of material conveying operation are met, and application and popularization are facilitated.

The invention relates to the technical field of medical instruments, and discloses a medicine balloon and a using method thereof. The medicine balloon comprises a balloon catheter which comprises a balloon body section and liquid passing pipes, wherein two ends of the balloon body section are respectively connected with a liquid passing pipe; the inner cavity of the balloon body section communicates with the liquid passing pipes to form a liquid passing cavity; a blood flowing cavity allowing blood to pass through is also arranged on the surface of the balloon body section and is defined by the side wall of the liquid passing cavity; and micropores for a drug microsphere preparation to pass through are distributed on the outer arc surface of the balloon body section. When the medicine balloon is pressurized, due to the fact that the blood flowing cavity can allow a blood flow in a blood vessel to pass through, sufficient downstream blood supply can be guaranteed, and myocardial ischemia caused by blood vessel plugging is avoided; meanwhile, sufficient contact action time between the surface of a balloon and the inner wall of a blood vessel is guaranteed, so the adhesion effect of adrug on a target blood vessel wall is improved; and the drug microsphere preparation is released to the blood vessel wall through arrangement of the micropores in the balloon body section, so the drug can be more stably and effectively retained on the blood vessel wall and stably released for a long time.

The invention provides a cell reselection method and a mobile terminal, and relates to the technical field of communication. The cell reselection method comprises the following steps: detecting whether a conflict exists between the reselection priority configuration of a current service cell and a switchable cell in a cell reselection process; and if so, determining one of the current service celland the switchable cell as a resident cell according to preset parameters, wherein the preset parameters are parameters other than reselection priority configuration parameter. The scheme of the invention is used for solving the problem of business anomaly since the mobile terminal cannot stably reside in a cell with better service quality due to the reselection priority conflict between the cells.

The invention discloses an auxiliary shape rectification welding tool for circular ring part quick clamping, and belongs to the field of welding tools. The auxiliary shape rectification welding tool comprises a bracket and a shape rectification fixing device rotationally erected on the bracket. The shape rectification fixing device comprises a base, an inner wall positioning mechanism, an outer wall positioning mechanism and a pressing mechanism. A welded circular ring part is fixed at multiple points by using multiple groups of mutually matched inner wall clamping blocks and outer wall clamping blocks, so that clamping and fixing are stable and reliable; and the inner wall clamping blocks and the outer wall clamping blocks synchronously stretch and retract inside and outside, so that a certain rectification function can be achieved on the welded circular ring part. In addition, in the clamping process of the inner wall clamping blocks and the outer wall clamping blocks, the pressing mechanism can be synchronously driven for linkage and downward pressing, and the upper portion of the welded circular ring part is pressed and fixed, so that clamping is more rapid and convenient, andthe clamping efficiency and stability are improved. Meanwhile, the inner wall clamping blocks and the outer wall clamping blocks can be moved and adjusted inside and outside radially in the circumferential direction, welding requirements of welded circular ring parts in different sizes can be met, and the product adaptability is high.

The invention discloses a novel combined pipe cutting machine system in the technical field of pipe cutting machines. The novel combined pipe cutting machine system comprises a bottom plate, a feeding mechanism is arranged on the left side of the top of the bottom plate, a pipe cutting mechanism is arranged on the right rear side of the top of the bottom plate, the top of the bottom plate is fixedly connected with a fixing ring located between the feeding mechanism and the pipe cutting mechanism through a connecting plate, a first rotating ring concentric with the fixing ring is rotationally connected to the inner wall of the fixing ring, a second rotating ring is fixedly connected to the side wall of the first rotating ring through a plurality of connecting rods distributed in a circumferential array mode, three sliding sleeves distributed in a circumferential array mode are jointly rotationally connected to the inner wall of the first rotating ring and the inner wall of the second rotating ring, and a positioning rod is connected in the sliding sleeve in a sliding manner. The pipe can be automatically limited when the pipe moves to the cutting position, limiting of the pipe is automatically canceled after cutting is completed, and the workload of workers can be greatly reduced.

The invention discloses a display lifting device comprising a support, a lifting base and a tension mechanism. The support is provided with a containing space, the lifting base is provided with a sliding block arranged in the containing space in a sliding fit mode, and friction force exists between the sliding block and the inner wall of the containing space. The tension mechanism is installed inthe lifting base and comprises a coil spring, a coil spring base, a pulley assembly and a pull rope. The coil spring base is installed in the lifting base in a rotating manner, one end of the pull rope is fixedly connected with the coil spring base, and the other end of the pull rope bypasses the pulley assembly to be connected to the sliding block. The coil spring comprises a free end and a winding drum part, the free end is fixedly connected with the coil spring base, and the winding drum part is arranged in the lifting base in a rotatable manner. By means of the display lifting device, thesize of the support is greatly reduced, cost is reduced, and the display lifting device is simple in structure and easy to machine and assemble.

The invention belongs to the field of building doors and windows, and particularly relates to an adjustable seal window. The adjustable seal window comprises a window frame body, a first soft slice, rubber columns, a first cavity, a second cavity, a push rod and an air sac, wherein the first soft slice is adhered to the surface of the window frame body, the edge of the first soft slice is in a wave shape, third cavities are formed in the centers of all the rubber columns, the first cavity is formed in the left side of the window frame body, a cylinder body is arranged in the first cavity, theupper side face of the cylinder body is connected with the upper side face of the first cavity through a third spring, a first rod is fixedly connected with the front side face of the lower end of thepush rod, and first springs are evenly arranged in the air sac. The adjustable seal window is used for sealing and ventilation adjustment of a bathroom, and can drive the push rod to compress the airsac by pulling the first rod downward, and then closes gaps among the rubber columns, thereby achieving sealing for the bathroom, and furthermore expands the air sac by pulling the first rod upward to drive the push rod to move up, and then enlarges the gaps among the rubber columns, thereby achieving ventilation between the bathroom and the outside.

The invention belongs to the technical field of preparation of novel nanometer functional materials, and particularly relates to a preparation method of surface-modified oil-soluble graphene oxide. The preparation method comprises the following steps: uniformly mixing graphene oxide, a modifier and at least two dehydrating agents in an organic solvent, and preforming a reaction on an obtained mixed solution at 10-60 DEG C for 12-48 hours to obtain the oil-soluble graphene oxide, wherein the modifier is an organic amine compound, and the organic amine compound comprises C6-C20 alkyl. Accordingto the preparation method, a technology and equipment are simple, a raw material is easy to obtain, a reaction condition is mild, operation and posttreatment processes are simple, and the yield is high; the preparation method is suitable for large-scale industrial production.

The invention provides a material hoister for building engineering construction. The material hoister for building engineering construction comprises a top driving structure, a suspension structure, atransportation structure and a bottom supporting structure. Workers transport engineering materials to be transported into an elevator car, the hoister is operated to ascend, the hoister drives a cable through a driving motor at the top to drive the elevator car to ascend, the elevator car is stabilized by fixed pulleys on the two sides of the elevator car in the ascending process, and when the elevator car reaches a floor to be reached, the elevator car stops ascending, a first driving motor supplies power to drive an electronic baffle to extend out, and a clamping block exerts force on theelectronic baffle. The material hoister for building engineering construction has good safety protection devices. Elevator doors and metal fences in the elevator car effectively prevent safety hazardsof construction materials falling from high altitudes. Through the operation of the electronic baffle and the clamping block in an elevator slide rail, the elevator can be effectively prevented fromfalling, the stability and the safety of the hoister are greatly improved, and convenience is brought to people.

The invention discloses an attendance checking identification device applying the Internet of Things, wherein the attendance checking identification device includes a mounting bracket, a camera and adustproof box; the camera is placed in a dustproof box; the mounting bracket includes a stand column, a rectangular groove is formed in the side wall of the stand column, and a sliding rail made of steel bars is arranged in the rectangular groove. The attendance checking identification device also includes a magnetic sliding block mechanism; one end of the magnetic sliding block mechanism is connected with the tail end of the dustproof box, and the other end is mounted on the sliding rail and can slide along the axial direction of the sliding rail; four shock absorption columns are arranged inthe dustproof box, one end of each shock absorption column is fixed with the inner wall of the dustproof box, the other end of each shock absorption column is fixed with the corner end of the camerathrough a locking hook, and the four shock absorption columns are in central symmetry about the central point of the camera. The axial height can be conveniently adjusted without directly moving the camera, the damage or destroy of a camera body caused by adjustment of the camera is avoided, and the attendance checking identification device has the advantages of dust prevention and strong shakingresistance.

The invention provides an adsorption type underwater robot, and relates to the field of underwater robots. The adsorption type underwater robot comprises a machine body and a plurality of supporting legs movably installed on the machine body, a crawling driving mechanism and a water pump are installed in the machine body, and the crawling driving mechanism is in transmission connection with the supporting legs. Suction cups are arranged at the bottoms of the supporting legs, water pumping openings are formed in the suction cups, and water pumping pipelines are connected between the water pumping openings and the water pump. The machine body is further provided with a top drainage port, a top drainage pipeline is connected between the top drainage port and the water pump, and the top drainage port and the supporting legs are located on the opposite sides of the machine body respectively. According to the underwater robot, downward reverse thrust is generated on the robot body through upward drainage of the top drainage port, and the top drainage port is matched with the suction cups of the supporting legs to generate the suction effect, so that effective suction force is formed between the supporting legs and the water bottom, it is guaranteed that the whole underwater robot stably climbs or stays under the action of water flow, and the reliability of construction operation is improved.

The invention discloses a law enforcement recorder for patrol, a control method and a working method thereof, comprising a law enforcement recorder body, an unmanned aerial vehicle and a background server. Using a combination of unmanned aerial vehicles and law enforcement recorder body, The system can arrive at the scene at the first time for recording shooting, and can quickly arrive at the scene when the road condition is poor or the police officer is far away. The shooting of the scene can be transmitted to the background server through the 4G module, so that the situation of the scene canbe checked or real-time monitored, and the situation of the scene can be accurately understood. Both the UAV and the law enforcement recorder are equipped with 4G modules, which can transmit data with the background service in real time, and record the scene from multiple angles and near and far focus.

The invention relates to a lighting lamp which comprises a lamp body and a mounting rack used for mounting the lamp body. The lamp body is provided with a light source. The lamp body and the mounting rack are connected in a rotatable mode through a damping rotating device. Since the lamp body and the mounting rack are connected through the damping rotating device, the lamp body can rotate relative to the mounting rack to adjust the lighting angle, and the lamp body can stably stay at a predetermined angle without external force.

The invention relates to the technical field of network technology, and discloses a network technology product transport case based on new generation of information technology, which comprises a shell, a buffer base is fixedly arranged at the bottom of an inner cavity of the shell, symmetrical air springs are fixedly connected to the lower part of the buffer base, a transport tank is movably connected to the upper end of the buffer base, and arc-shaped plates are fixedly mounted on the left side and the right side of the transport tank in the inner cavity of the shell. According to the networktechnology product transport case based on the new-generation of information technology, the transport tank is transversely buffered through oblique tension springs and buffer springs, air is extruded into an air guide pipe in cooperation with transverse movement of the transport tank, and wedge blocks synchronously reduce the passage area of the air guide pipe, so that air circulation of the airguide pipe is not smooth, the movement obstruction degree of the transport tank is increased, and therefore, articles in the transport tank can be effectively kept in a relatively stable state, and meanwhile the integrity of the transport tank and the articles is guaranteed.

The invention relates to a rolling ball system motion control method based on multi-closed-loop cascade control, and the control method is applicable to a rolling ball system which takes a camera as asingle sensor. The rolling ball system comprises a rolling ball, a target point, a flat plate, a camera and a control mechanism, wherein the control mechanism controls the motion of the rolling ballby adopting a multi-closed-loop cascade control scheme; according to the multi-closed-loop cascade control scheme, the data information acquired in real time through the camera is used as feedback, and the motion of the rolling ball is adjusted; the multi-closed-loop cascade control scheme comprises the following steps that double-closed-loop cascade control based on a speed ring and an acceleration ring is adopted when the distance between the rolling ball and a target point is greater than a preset first distance; the speed ring takes the speed of the rolling ball on the flat plate as the feedback signal; and the acceleration ring takes the acceleration speed of the rolling ball on the flat plate as the feedback signal. Compared with the prior art, the motion control method of the rolling ball system is easy to implement, the control effect is high, and the rolling ball can quickly, accurately and stably reach the target point on the flat plate.

The invention belongs to the technical field of unmanned aerial vehicles, and especially relates to an unmanned aerial vehicle landing buffer device. Aiming at the problems that an existing unmanned aerial vehicle needs to land after executing a flight task, existing unmanned aerial vehicles land rigidly, at the moment of landing, the unmanned aerial vehicle can face large impact force, and the impact force can influence the service life of the fuselage of the unmanned aerial vehicle, the scheme is provided, the unmanned aerial vehicle landing buffer device comprises a supporting base, two symmetrically-arranged buffer rods are fixedly installed at the top of the supporting base, the same landing plate is fixedly installed at the tops of the two buffer rods, an unmanned aerial vehicle is placed at the top of the landing plate, and two symmetrically-arranged rotating plates are rotationally installed at the top of the landing plate. According to the landing buffering device body, soft landing of the unmanned aerial vehicle is achieved, buffering and damping are conducted at the moment when the unmanned aerial vehicle lands on the landing plate, the stability performance of a vehiclebody of the unmanned aerial vehicle is improved, and the wide market popularization prospect is achieved.

The invention discloses a server case easy to disassemble and assemble. Comprising a box body, a mounting frame, a bottom vertical plate and a first elastic buckle, wherein the mounting frame is connected to the inner walls of box body side plates on the two sides of the box body in a turnover manner; the bottom vertical plate is vertically arranged at the front end of the box body and is used for supporting the mounting frame; the first elastic buckle is connected to the bottom surface of the mounting frame; the first buckling plate is arranged on the bottom vertical plate and is used for forming clamping locking with the first elastic buckle; the limiting side edges are arranged on the two sides of the top end of the mounting frame and are used for forming limiting abutting connection with the end faces of the top ends of the corresponding box body side plates after rotating by a preset angle; and a first mounting cavity for mounting a hard disk is formed in the mounting frame. Therefore, a user can utilize part of the vertical space as the operation space, and the limitation of the operation space in the horizontal direction is broken through, so that the disassembly, assembly and maintenance operation of the hard disk and other components in the case can be conveniently and quickly realized, the operation difficulty of the user is reduced, and the operation efficiency and experience of the user are improved.

The invention discloses a technology for baking and grinding high-moisture chalk through a vertical mill and belongs to the field of cement raw materials prepared by adopting high-moisture chalk raw materials. Clammy chalk with the moisture more than 25% is fed onto an inner refiner plate of the vertical mill from a feeding mouth of the vertical mill; hot wind passes through a wind chamber, a wind ring and a chamber above the refiner plate from a hot wind inlet and discharges out of the vertical mill from a hot wind outlet; zone control is performed on the moisture of materials inside the mill; the moisture of the materials is dried step by step; a powder selecting machine, the feeding mouth and the hot wind outlet are arranged at the upper part of the vertical mill; the refiner plate and mill grinding rollers are arranged inside the vertical mill; a cloth scraping plate is arranged above the refiner plate; a retaining ring is arranged at the edge of the refiner plate; the height of the retaining ring exceeds 150 mm; the wind chamber is arranged below the refiner plate; the wind chamber is communicated with the chamber above the refiner plate through the wind ring; the hot wind inlet of the mill, a material scraping device and a feeding back port are arranged in the wind chamber, the feeding back port is connected with the feeding mouth through an outer circulating system of the mill. The invention provides a simpler and energy-saving preparation technology and device for preparing the cement raw materials by adopting the high-moisture chalk raw materials.

The invention discloses a hand cart for construction object-carrying ascending operation. The hand cart comprises bottom supports, a fork knife, lifting supports, a hydraulic rod, a hand handrail, rear seat supports, a fixed seat and a containing frame; the bottom supports are two parallelly-arranged steel structures; the lifting supports are mounted at the tail ends of the two bottom supports ina welded mode correspondingly; the two lifting supports are parallelly and vertically mounted on the bottom supports; the rear seat supports are mounted on the outer sides of the lower parts of the two lifting supports in a welded mode; and the two rear seat supports are parallel to the two bottom supports and arranged above the bottom supports. The problem that during ladder ascending operation,excessive materials cannot be carried is solved, and the problems that when ascending operation needs to be carried out in a construction site, a half-height fixed operating table is always manufactured firstly, the time of workers is wasted, materials are consumed, and the fixed operating table is inconvenient to use are also solved well.

The invention discloses a foggy day helicopter landing point identification unfolding platform which comprises a box body. A left-right through cavity is formed in the box body, an unfolding device isarranged in the cavity, the unfolding device can be properly unfolded or completely unfolded and can adapt to the process of falling off from a helicopter and the process of completely unfolding to wait for landing of the helicopter, and fixation on a natural soil layer of a small-gradient mountainous area can be realized; a helicopter tail position detecting device is arranged at the front sideof the unfolding device, the helicopter tail position detecting device is used for detecting whether a helicopter tail has enough staying positions or not, and a parallel detection device used for detecting whether a helicopter body stays horizontally or not is arranged at the lower side of the unfolding device; and a moving device used for driving the box body to be fixed to the lower side of a helicopter or fly in the air is arranged at the upper side of the unfolding device, and the helicopter tail position detecting device can detect whether a helicopter tail space meets the staying requirement or not.

The embodiment of the invention provides a communication signal detecting and positioning method, which comprises the following steps of: moving a first base station and a detecting and positioning device to an area where to-be-positioned communication equipment is located, performing frequency sweeping by the detecting and positioning device, and acquiring a frequency point to which the to-be-positioned communication equipment is to be switched according to a frequency sweeping result; accessing to-be-positioned communication equipment through a first base station, establishing a pilot frequency cell according to a frequency point to which the to-be-positioned communication equipment is to be switched, and switching the to-be-positioned communication equipment to the pilot frequency cell;the detection positioning device communicates with the to-be-positioned communication equipment to obtain an energy value fed back by the to-be-positioned communication equipment, and the direction and the position of the to-be-positioned communication equipment are determined according to the energy value fed back by the to-be-positioned communication equipment. According to the embodiment of the invention, the to-be-positioned communication equipment stably resides in the pilot frequency cell, so that the detection positioning device stably communicates with the to-be-positioned communication equipment, and accurate positioning of the to-be-positioned communication equipment is realized.

The invention discloses a face recognizer with a dual locking function. The face recognizer comprises a mounting plate and a camera, wherein the mounting plate is a strip-shaped plate, a rectangular groove is formed in the plate surface of the strip-shaped plate, and a sliding rail made of steel bar strips is arranged in the rectangular groove. The face recognizer further comprises a magnetic sliding block mechanism, wherein one end of the magnetic sliding block mechanism is connected with the tail end of the camera, the other end of the magnetic sliding block mechanism is arranged on the sliding rail and can axially slide along the sliding rail, a magnetic limiting block is further arranged at the lower end of the magnetic sliding block mechanism, a semi-closed arc-shaped groove is formedin one end of the magnetic limiting block, the arc-shaped groove is clamped on the sliding rail, the other end of the magnetic limiting block is fixed with an arc-shaped supporting rod, the inner concave surface of the arc-shaped supporting rod is vertically downward, an elastic ball is fixed at the free end of the arc-shaped supporting rod, and the elastic ball is in contact with the bottom endof the camera. According to the face recognizer, the axial height of the camera can be conveniently adjusted without touching the camera, injury or damage to a body due to the fact that the camera isadjusted can be avoided, and the anti-shake and anti-seismic functions are achieved.