217results about How to "Overall small size" patented technology

The invention belongs to the technical field of assembly of automobile components, and particularly relates to an automatic assembling machine for an automobile door hinge. The automatic assembling machine comprises an annular plate and a transmission rotation disk which is arranged in the middle of the annular plate and rotates intermittently; follow-up clamps with the number corresponding to that of processes are distributed on the surface of the plate; the transmission rotation disk is also provided with pushing mechanisms which are used for pushing the follow-up clamps to move along the surface of the transmission rotation disk in the radial direction; and a clamp positioning mechanism and a process execution mechanism are distributed on the surface of the annular plate; the pushing mechanism has two position states, wherein one of the positioning states is that the pushing mechanism pushes the clamp to extend out of the transmission rotation disk to reach the clamp positioning mechanism for positioning to ensure that the process execution mechanism can performing assembly of the process; and the other position state is that: after the process is finished, the clamp is driven to be contacted to the transmission rotation disk and is separated from the clamp positioning mechanism of the assembly position of the process. The automatic assembling machine has a simple structure, is easy to maintain and operate, greatly reduces the operation cost of hinge assembly manufacturers, and improves the running reliability of equipment.

The invention discloses a polarized light-emitting diode (LED). An LED chip of the polarized LED comprises a work area consisting of an n-type area, p-type area and a quantum well structure, a substrate, an insulating dielectric film, a transparent electrode and a metal electrode. The polarized LED is characterized in that a raised or embedded grating is prepared on the light-emitting surface of the LED chip, and the grating has the period between 50 and 600 nm, the duty cycle between 0.2 and 0.9 and the thickness between 50 and 400 nm. Compared with the prior LED external polarizer for realizing polarization, the polarized LED adopts a technical proposal of directly integrating and manufacturing a grating structure on the surface of the LED chip and achieving the aim that the emitted light of the LED chip is polarized light with no external polarizer and other structures. Therefore, light-emitting devices are greatly reduced in integral volume, optimized in performances and lower in cost. In addition, the polarized LED can be integrated on a light-emitting chip at a time through a semiconductor lithography process, and is easy to realize industrialization, popularization and application.

The invention provides an intelligent multiparameter-monitoring buoy device. The intelligent multiparameter-monitoring buoy device comprises buoy equipment, water quality monitoring equipment, communication equipment and power supplying equipment, wherein the buoy equipment is used for enabling the whole buoy device to float on the surface of water, the water quality monitoring equipment is used for monitoring water quality, the communication equipment is used for realizing data transmission between the water quality monitoring equipment and a shore-based main station side and positioning the water quality monitoring equipment and the shore-based main station side, and the power supplying equipment is used for supplying power. According to the intelligent multiparameter-monitoring buoy device, by adopting an embedded-type low-power-consumption design, the integral volume of an instrument compartment and a buoy is reduced; by adopting an intelligent operation mode, the timed, continuous or specified monitoring on water quality is realized; by adopting intelligent electrical quantity management, the effective operation of a solar power supplying system is realized; by adopting a multi-mode mutually-standby communication mode, the real-time property of data is improved, and the risk of out-of-touch is lowered; a sensor with a self-cleaning device is adopted, and intelligent analytical judgment is carried out by integrating a variety of information, so that the quantity of field maintenance is minimized; and the buoy is subjected to integrated protection in multiple manners such as electricity, sound, light and the like, so that the influence on the safety of the buoy caused by marine environments, fishery activities and the like is lowered and prevented.

The invention relates to a mobile terminal with flexible screens. The mobile terminal includes a first main body, a second main body and a flexible screen assembly; the first main body and the second main body are arrange at intervals; the flexible screen assembly includes metal sheets which are overlapped with one another sequentially, a flexible display screen and a flexible touch screen; two ends of each metal sheet are fixedly connected with the first main body and the second main body respectively; and each metal sheet, the flexible display screen and the flexible touch screen respectively comprise a bending zone, and the bending zones can be bent or unfolded, so that the first main body and the second main body can have opening and closing angles ranging from 0 degree to 180 degrees. According to the mobile terminal with the flexible screens provided by the invention, when the bending zones are bent, stacking of wrinkles in bending can be prevented since the bending deformation quantity of the bending zones is constantly located between the interval of the first main body and the second main body; and the mobile terminal can be bent by means of the bending features of the metal sheets, the flexible display screen and the flexible touch screen, and therefore, a rotation shaft or other supports are not required to be adopted additionally, and therefore, the mobile terminal with the flexible screens is compact and simple in structure.

The invention relates to a hydraulic control system with a double-feedback active proportional servo cartridge valve for a CNC (Computer Numerical Control) bending machine, in particular to hydraulic control system equipment with the double-feedback active proportional servo cartridge valve for the CNC bending machine, wherein the hydraulic control system is synchronized actively and has adjustable speed servo. The hydraulic control system consists of two main cylinder control valve banks, an oil inlet control valve bank and a workbench compensating oil cylinder, wherein the two main cylindercontrol valve banks are arranged separately; two double-active servo cartridge valve units, a safety control unit and a pressure regulating unit are arranged in each valve bank; the two main cylindercontrol valve banks are used for driving corresponding main cylinders respectively to ensure the synchronous position accuracy of each main cylinder; and the oil inlet control valve bank is used for controlling the inlet and outlet of oil and the proportional regulation of the system pressure and supplying pilot control oil to the double-active servo cartridge valve. The hydraulic control system has the advantages of simple structure, accuracy and simplicity and convenience for operation control due to the adoption of the cartridge valve, stability and reliability for work, no leakage, high efficiency, reduced energy consumption, reduced equipment manufacturing cost and high integration degree, and is widely applied to the hydraulic control equipment of the CNC bending machine.

The invention belongs to a microwave antenna technology, and relates to the improvement of a broadband medium back cavity four radiator antenna unit. The low profile broadband medium back cavity four radiator antenna unit comprises a radiation medium plate (1), a microstrip feed medium plate (2) and a quartern power divider, and is characterized in that a medium back cavity is used to replace a metal back cavity. According to the invention, the volume and the weight are reduced; feed loss is reduced; the overall integration is improved; and the cost is reduced.

An image forming apparatus capable of preventing the increase of the size thereof by having a lengthened developer bearing member is provided with regard to an image forming apparatus capable of printing a registration mark (dragonfly) on a large sheet of recording paper for producing an art work in case of the use of a formed image as a printing manuscript. The length of the lengthwise direction of a developer bearing member provided in at least one developing device among the developing devices provided in the image forming apparatus is longer than those of the developer bearing members of the other developing devices.

The invention discloses an over-flow sterilization and disinfection device and water purification equipment. The over-flow sterilization and disinfection device includes a deep ultraviolet LED lamp assembly, an overflow tube assembly and a water tube assembly; the water tube assembly includes a connection seat, a water inlet tube and a water outlet tube, an inner ring-shaped spacer is arranged onthe inner end face of the connection seat, a water inlet communicated with the water inlet tube and a water outlet communicated with the water outlet tube are arranged on the inner end face of the connection seat, the water outlet is located on the outer side of the ring-shaped spacer, and the water inlet is located in the ring-shaped spacer; the water tube assembly is disposed on the other end ofthe overflow tube assembly, the ring-shaped spacer is connected with the corresponding port of a first transparent tube in a sealed mode, and the connection seat is connected with the corresponding nozzle of a second transparent tube in a sealed mode; the first transparent tube is connected with the water inlet, and an overturn flow channel is communicated with the water outlet. The over-flow sterilization and disinfection device has more compact structure, and water discharge rate is increased to improve user experience.

The invention discloses a method and a system for utilizing engine waste heat. The system comprises an engine cylinder body and a cooling water jacket outside the engine cylinder body, wherein the cooling water jacket is provided with a plurality of spray heads; each spray head is connected with a water tank through a water pump; the cooling water jacket is provided with a steam outlet; the steam outlet is connected with a steam driving device; the steam driving device is connected with an electric generator; and the electric generator is connected with a storage battery. The method and the system provided by the invention are particularly suitable for gasoline-electric hybrid automobiles. Steam kinetic energy produced by cooling an automobile engine is continuously and dynamically converted into electric energy, so that an automobile storage battery is charged continuously, the construction of a special charging station for hybrid electric vehicles can be avoided, resource investment can be saved greatly, the rapid development of the gasoline-electric hybrid automobiles is promoted and the international development trends of energy conservation and emission reduction are conformed.

This invention relates to a super broad band antenna with the function of filtering interference signals including a medium substrate, the internally extending part adhered with a metal layer along one edge of one side of which is taken as the ground, the other side correspondingly adhered is taken as the metal plate of a single pole antenna unit and a micro-strip wire as a feeding wire, in which, the single pole antenna unit is connected with the micro-strip wire and artificial magnetic medium material is set symmetrically at both ends of the micro-strip. This invention can realize forbidden band at a certain working frequency sphere so as to filter interference signals.

The invention relates to a mini laser scanning device and a portable terminal thereof. The mini laser scanning device comprises a laser transmitter module, a line optical collector, a swaying mirror,a photoelectric conversion module, a steering mirror, a dot optical collector and a data processing module for acquiring pattern information by scanning with laser, wherein the steering mirror and thedot optical collector are in V-shaped connection, and the dot optical collector is provided with a hole for the laser which shoots at the swaying mirror after being steered via the steering mirror. By combining the steering mirror with the dot optical collector, the invention decreases the whole volume of the mini laser scanning device and realizes the laser scanning with tiny external dimensions. By promoting the swaying frequency of the swaying mirror, the scanning time is shortened and the detecting efficiency is promoted. Due to the tiny external dimensions, the invention can be widely applied to various devices, such as bar code data acquisition units, bar code scanners, portable digital terminals, etc.

The invention discloses a preparation method of micro-pills prepared from cassia twig and tuckahoe, which comprises the following steps: extracting volatile components from cassia twig and moutan bark; mixing the dregs of the cassia twig and moutan bark with red peony root and peach kernels, boiling with water, merging the obtained decoction and the liquid medicine of the cassia twig and moutan bark after the volatile components are extracted, concentrating, depositing in alcohol, filtering, and taking the filtered solution; carrying out inclusion on the volatile components of the cassia twig and moutan bark to obtain inclusion complexes; and respectively preparing a powdered extract, an extract and a fluid extract by using the filtered solution, fine tuckahoe powder and the inclusion complexes, preparing female mold pills by using the powdered extract as a mold core and using the extract as a bonding agent, preparing micro-pills by using the fluid extract as a spouting increasing agent and using a fluidized bed granulation method, and coating to obtain the micro-pills prepared from cassia twig and tuckahoe. By the invention, the effective components of the medicines are effectively extracted, the medical effect is improved, and the performance quality of products is stable. By using the pure powdered extract prepared from cassia twig and tuckahoe as the mold core, the medicine carrying content of the micro-pills is high; by using the fluidized bed granulation method for preparing the micro-pills, the yield is high; and after the micro-pills are coated, the hygroscopicity of the micro-pills is obviously reduced, thereby solving the problem of moisture absorption of a pure extract preparation.

A compact filter element with a large filter surface area having inner and outer rings of filter material with an annular space between them, such that fluid to be filtered can be introduced into the annular space between the rings of filter material and a portion thereof can flow through the outer ring of filter material to the periphery of the filter element and another portion thereof can flow through the inner ring of filter material to the center of the filter element; at least one fluid-permeable support member for the filter material, and at least one end disk on an axial end face of the filter element affixed to the rings of filter material in a sealed manner, in which the end disk has a centrally arranged inlet opening for the fluid to be filtered and one or more radially extending distributor channels leading from the central inlet opening to at least one eccentrically arranged outlet opening which opens into the annular space between the rings of filter material to admit fluid to be filtered to the annular space.

The invention relates to a paging talkback method and device, in particular to a wired multi-seat paging talkback method and device for reader positioning mobile personnel, comprising a reader, a paging talkback extension and a high level host. When paging of user is close to mobile personnel or designated personnel, a system searches the mobile personnel or carry-on RFID responser to obtain the position of the mobile personnel, thus obtaining the address of the talkback extension near the mobile personnel, and the high level host adopts channel bridging method to cause different talkback extensions to talkback effectively. The system can help a caller to search the designated personnel to complete full-duplex talkback, thus being feasible for patient in hospital to call own charge nurse or medical personnel and call other mobile medical personnel by wired cable for talkback, and meanwhile the system also can increase seats of nurse station receiving paging talkback nurse and reduce waiting time of patient.

The invention discloses a miniature spectroscopic ellipsometer device used for measuring a nano-film sample. The miniature spectroscopic ellipsometer device comprises a light source and collimating lens integrated module, a spectroscope, a polarization modulation module and a polarization detection module, wherein the light source and the collimating lens integrated module are arranged on one side of the spectroscope; the polarization modulation module comprises a polarizer, a phase retarder, a diaphragm and a convergence lens; incident light beams sequentially pass through the polarizer, the phase retarder, the diaphragm and the convergence lens, are then incident on the surface of a to-be-detected sample piece on a sample stage and are reflected; the reflected light beams pass through the convergence lens and the diaphragm, then pass through the phase retarder again to be modulated, and are converged by the convergence lens to obtain a plurality of light spots after being subjected to polarization detecting by the polarizer, dispersion convergence is performed on the light spots by a micro lens grating module, so that lights with the same wavelengths are converged on the same point on a receiving plane of a detector, and optical intensity signals of a plurality of different polarization modulation passages can be obtained. The invention further discloses a measuring method based on the miniature spectroscopic ellipsometer device. A light path is more compact, the overall volume reaches the centimeter magnitude, and the sample detection time and the calculation time are remarkably shortened.

The invention discloses a dual-motor inverter comprising a main box, a first power module, a second power module, an AC plug, a first metal bracket, a second metal bracket, a first driving board, a second driving board, a DC busbar assembly, a DC bus capacitor and a control board. The dual-motor inverter of the invention is mainly used for controlling a wheel motor or a hub motor, a cooling structure adopts parallel cooling, and the balanced cooling and heat dissipation ability of the two power modules can be ensured. A conductive terminal of the AC plug passes through a current sensor to be directly connected to the power module, an AC transition copper bar is omitted, the assembly space and the required cost of the inverter are greatly reduced, thus the dual-motor inverter has the characteristics of high integration, a compact structure, good heat dissipation effect and balanced cooling capability, high electromagnetic compatibility and convenient and fast operation, and especially the requirements of controller layout and high reliability of a new energy vehicle driven by the hub motors or the wheel motor are satisfied.

The invention provides a micro-vibration active and passive integrated vibration isolation device for a reaction flywheel. The vibration isolation device includes an upper cover plate, a supporting unit and a lower bottom plate. The vibration isolation device is installed between the reaction flywheel and the spacecraft deck, and is used to reduce the impact of the disturbance force generated by the reaction flywheel on the stability of the spacecraft platform and the pointing accuracy of sensitive loads, while ensuring the attitude control moment of the reaction flywheel Passed normally to the spacecraft deck.

The invention discloses a bus recorder. The bus recorder comprises a structural box and a hardware board card, wherein the hardware board card is installed in the structural box and comprises a microprocessor, a storage circuit, a power supply circuit, a Flexray interface circuit and a CAN (controller area network) interface circuit; the microprocessor is used for reading configuration files in the storage circuit and recording and storing collected bus data; the storage circuit is used for storing the configuration files and the collected bus data; the power supply circuit is used for supplying electric power to all electric circuits of the bus recorder; the Flexray interface circuit is used for accessing Flexray bus data; and the CAN interface circuit is used for accessing CAN bus data. The bus recorder can be used for recording the Flexray bus data, is compatible with the CAN bus data simultaneously, and has the advantages of high universality, small overall size, light weight and the like; and the recorded data are complete, high in reliability and high in degree of confidence, can be used for analysis and diagnosis, performance evaluation, maintenance advice giving after events and have the better economic benefit.

The invention discloses a projecting apparatus and a converging module. The converging module is used for converging and refracting an incident beam and comprises a bent incidence surface, a bent emergence surface and a reflection surface, wherein the bent incidence surface is used for receiving the incident beam, the bent emergence surface is arranged on a transmission path of the incident beam from the bent incidence surface, the reflection surface is arranged on the transmission path of the incident beam and located between the bent incidence surface and the bent emergence surface, and a piece of light in the incident beam passes through the bent incidence surface along the optical axis of the bent incidence surface and emerges from the bent emergence surface in the direction inclining relative to the optical axis of the bent emergence surface. The overall size of the projecting apparatus can be easily reduced, and the converging module has the effect of compensating for optical distances.

The invention discloses a selfie stick which comprises a handle part, a clamping part, an extension and contraction component and an extension and contraction control device. The handle part is used for gripping by a user during use; the clamping part is used for clamping shooting equipment like a mobile telephone and a camera; the extension and contraction component is connected with the handle part and the clamping part, and can be set to be switched between an extension state and a contraction state; and the extension and contraction control device comprises a spiral spring which is arranged in the handle part and the extension and contraction component and is used for controlling the extension and contraction component to extend and contract. According to the selfie stick, the extension and contraction of the extension and contraction component are controlled by adopting the spiral spring, and the size of the handle part can be reduced significantly by using the superior flexural property of the spiral spring, so that the selfie stick is small in overall size, is user-friendly, and is particularly convenient for a female user to hold.

The present invention is head driving mechanism for flat knitting machine, and belongs to the field of knitting machinery technology. The head driving mechanism includes a DC motor controlled with the electric control box, a synchronous belt wheel fixed directly onto the power output shaft of the motor, a synchronous belt on the synchronous belt wheel, and a pulley slip fitting the track on the frame. The present invention adopts DC motor, rather than asynchronous AC motor, and has the advantages of easy installation, small size, raised safety and low power consumption.

A tobacco packaging method and system, the method is that sending the incompact tobacco leaf after rebaking to the material boxes, after prepressing by the prepressing mechanism, then sending to the compacting mechanism to compact and package. The system includes an elevating prepressing mechanism (3) mounted on the machine frame (8) and a compacting mechanism (11), the elevating material boxes (4, 4') are respectively provided on the lower of the prepressing mechanism and the compacting mechanism, a rotating box mechanism (6) for rotating along the rotating axis and placing the material boxes and tobacco boxes is provided on the lower of the material boxes, a jacking device for jacking the rotating box mechanism and the material boxes is provided on the machine frame, a hooking material mechanism (9) for preventing the prepressed tobacco leaf from overflowing the material boxes is provided on the upper in the material boxes. The invention first prepresses the tobacco leaf, then compact and package, capable of reducing greatly the height of packaging material boxes and improving the packaging efficiency, the packaging system is easy to be mounted, maintained and operated, realizing the prepressing and packaging with high efficiency.

The invention discloses a pyramid structural type atom interference gravitational acceleration measurement device based on a two-dimensional crossed grating. The device comprises a vacuum chamber, a beam expansion cylinder, the two-dimensional crossed grating and a reflector assembly used for generating a separate pyramid structure, wherein the beam expansion cylinder is used for leading single fibers of the vacuum system in, the two-dimensional crossed grating is arranged between the beam expansion cylinder and the reflector assembly, the reflector assembly sequentially comprises an MOT region, an interference region and a detection region from up to down, the MOT region comprises four first reflectors, and a lower portion of the detection region is provided with a second reflector. The device has advantages of small entire size, strong robustness, low cost and high measurement precision.

The invention discloses a movable type dust suction device comprising a base, a motor and a draught fan, wherein the motor is arranged on the base; the upper part of the motor is provided with a first dust catcher; the draught fan is arranged on the first dust catcher and connected with the first dust catcher through a first pipeline; a motor shaft of the motor is connected with a rotating shaft of the draught fan through a belt; a dust containing box is connected to the side wall of the motor; the upper part of the dust containing box is provided with a second dust catcher; the second dust catcher is connected with the draught fan through a second pipeline; one end of a dust suction pipe is connected to the side wall of the second dust catcher, and a suction head is connected to the other end of the dust suction pipe; the first dust catcher is provided with a discharge pipe; a silencer is sleeved on the discharge pipe; and the lower surface of the base is provided with a sliding wheel. The invention has small size and flexibility and can be used for cleaning places such as road sides, small-size roads, houses, and the like.

The invention belongs to the technical field of testing and particularly relates to a quaternary composite array sensing layout method based on PIR (passive infrared) sensors and microphones, aiming to solve the technical problems of mutual interference of spatial layout and poor sensing effect of a composite sensor in a limited space currently. The quaternary composite array sensing layout method based on the PIR sensors and the microphones comprises a quaternary cross-shaped PIR sensing array and a quaternary microphone array. The quaternary cross-shaped PIR sensing array comprises four human body probers which are arranged at equal intervals by surrounding a central point, a probe of each human body prober faces outward, and the four human body probers are used for probing four directions on the horizontal plane respectively. The quaternary microphone array comprises four microphones which are arranged in four dual-sensing areas respectively. The quaternary composite array sensing layout method based on the PIR (passive infrared) sensors and the microphones has the advantages that by means of composite optimization of the PIR array and the sensor array, the problem that micro sensing node space is limited is solved; the two kinds of arrays are combined mutually but do not interfere with each other; a target can be discovered quickly and positioned precisely.

A backpack forklift comprises a frame. Traveling devices are mounted on the undersurface of the frame, a pushing device and an electric control system are mounted in the frame, a lifting device is mounted on the frame and connected with the pushing device, the electric control system is connected with the traveling devices, the pushing device and the lifting device, a sliding groove is formed in the frame, and both the pushing device and the lifting device are arranged in the sliding groove; each traveling device comprises a top cover, castors, a driving assembly and a castor frame, the castors and the corresponding driving assembly are mounted on the corresponding castor frame, each driving assembly is connected with the corresponding castor frame to drive the same to rotate, the upper end face of each castor frame is connected with the corresponding top cover through a flange, each top cover is fixedly mounted with the frame, and the traveling devices are arranged at four corner areas of the frame. The backpack forklift is supportive of automated intelligent operation, size of the forklift is reduced, and the backpack forklift is suitable for various moving passages, flexible to move and high in passability.

Provided is a molded case circuit breaker including a front space, a rear space divided from the front space, a fixed contact unit provided on one side of the front space and in electric contact with one of a power supply and a load, a movable contact unit installed in the front space to be movable and in contact with the fixed contact unit, a switching device installed in the rear space and operating to allow the movable contact unit to be in selective contact with the fixed contact unit, an operation device installed in the front space and the rear space and transferring the movable contact unit according to operation of the switching device, an arc extinguishment chamber installed on the one side of the front space and extinguishing an arc induced while the fixed contact unit is being separated from the movable contact unit, and a barrier preventing backward movement of the arc from at least one position of a moving way of the movable contact unit, the position separate from the fixed contact unit.

The invention relates to an encoder, and specifically provides a stay wire displacement encoder. The encoder comprises a draw ring, a damping ring, a stay wire guiding column, a stay wire, a reel, a spiral spring, a coiling spiral ring box, an encoder bearer and an encoder main body, wherein the encoder main body is arranged on the encoder bearer, the reel and the spiral spring are successively arranged in the coiling spiral ring box under the encoder bearer, the stay wire is wound on the reel, one end of the stay wire is provided with the draw ring and the damping ring, a spiral spring chamber is arranged inside the reel, the spiral spring is arranged in the spiral spring chamber, and the stay wire guiding column is arranged on the coiling spiral ring box. The stay wire displacement encoder has the advantages of simple and reasonable structure, convenient installation and debugging, less occupied space, low cost and high production efficiency.

The invention discloses a long-optical-path detection pool. The long-optical-path detection pool comprises a tubular colorimetric pool with two opened ends, wherein a detection light source is arranged at one end of the colorimetric pool, and an optical detector is arranged at the other end of the colorimetric pool. The long-optical-path detection pool is characterized in that the colorimetric pool comprises a spiral portion. According to the long-optical-path detection pool adopting a spiral structure, the optical path is greatly increased, the integral size is reduced, and the defect of fragile structure due to the overlong colorimetric pool is overcome. The long-optical-path detection pool has the advantages of simple structure, long optical path, high strength and the like.

The invention relates to an adhesive tape cutting device which is characterized by comprising a base frame, a slide block, a motor, a clamping mechanism, a cutter frame, a cutter seat, a cutter and a regulation mechanism, wherein the slide block can be arranged on the base frame in a horizontal slip mode; the motor is arranged on the slide block; the clamping mechanism is used for clamping a rolled adhesive tape, is arranged on the slide block and is in transmission connection with the motor through a transmission mechanism; the cutter frame is arranged on the base frame; the cutter seat can be rotationally arranged on the cutter frame and is provided with a handle; the cutter can be rotationally arranged on the cutter seat and is provided with a vertical and downward cutting face; and the regulation mechanism is used for regulating the distance between the slide block and the cutting face of the cutter. Compared with the prior art, the adhesive tape cutting device provided by the invention can meet the accurate cutting precision through the regulation mechanism, can also realize the purpose of accurately cutting an adhesive tape with a narrower width, does not need a pneumatic shaft with a larger volume to be used as a clamping tool, has the advantages of smaller whole volume, simple structure and lower manufacturing cost, and is convenient to move and place.