121results about How to "To achieve the purpose of dust prevention" patented technology

The invention provides a multi-point water sample automatic acquisition device carried by an unmanned ship. The multi-point water sample automatic acquisition device comprises a water sampling control module, a water inflow device, a water storage device and a transmission device. The water inflow device comprises a water suction pump, a water suction pipe for water suction and a connecting pipe for connecting the water suction pump with the water storage device. The water storage device comprises a tray, a supporting rod, a water sampling bottle frame, water sampling bottles and a cover plate. The water sampling bottle frame is fixed above the tray through the supporting rod, and the transmission device can drive the water sampling bottle frame to rotate around the supporting rod. A circle of water sampling bottle clamping grooves is formed in the water sampling bottle frame, and one water sampling bottle is clamped and fixed into each water sampling bottle clamping groove. The cover plate capable of covering the water sampling bottle frame is installed above the water sampling bottle frame, a water pipe joint communicated with the connecting pipe is arranged on the cover plate, and the water sampling control module is used for controlling the rotating angle of the water sampling bottle frame and the starting and stopping time of the water suction pump. Multi-point water sample acquisition can be achieved, manual work can be replaced, precision control can be achieved during multi-point acquisition, efficiency is high, and installation and use are both convenient.

The present invention provides a grinding machine, which ensures the feet have high dustproof quality by simple structure. Sponge bushing (28) is installed on the peripheral part of the foot main body (24) of each foot of the finish machining grinding machine (1). The sponge bushing (28) is a tube type body with longer length than the distance in up and down direction of the upper-lower pillow (27) in axial direction, the upper and lower end of the sponge bushing contact the hatch end of the pillow (27) separately, and close the pillow (27) through distortion according to the shape of the hatch edge. Thus, dust can not enter the inner of the pillow (27) between the feet main body (24) and the pillow (27).

The invention discloses a damp-proof dustproof multi-layer storage device for electronic elements. The damp-proof dustproof multi-layer storage device comprises a box body, wherein an open-source single chip microcomputer, an internet of things device and air blowing device are separately mounted on the side surface of the box body; a heating device is mounted at the inner side of the box body; the inner side of the box body is movably connected with a storage box through a first slide mechanism; the side surface of the storage box is fixedly equipped with a rubber handle; the storage box is fixed with the box body through a blocking mechanism; and the inner side of the storage box is movably connected with a partition plate through a second slide mechanism. According to the damp-proof dustproof multiplayer storage device for the electronic elements disclosed by the invention, slide rails are in sliding connection with slide slots for taking out the storage box from the box body, the electronic elements are placed inside the storage box, and the storage box is conveniently opened for convenient use; and magnetic card slots are in blocking connection with magnetic card slots for connecting the storage box to the box body in a sealing mode, so that outside moisture is prevented from entering the box body through a connecting seam, and therefore, moisture resistance of the storagedevice is greatly improved.

The invention disclsoes a platform body, wherein sliding grooves are formed in the two sides of the platform body, a plurality of first heat dissipation grooves are formed in the two sides of the twosliding grooves, shielding plates are slidably connected to the interiors of the two sliding grooves, and a plurality of second heat dissipation grooves with the same size as the interiors of the first heat dissipation grooves are formed in the outer surfaces of the shielding plates. Compared with the prior art, in the modular big data scientific research platform, the rotating sleeve is driven torotate by rotating the round block and drives the threaded rod to move up and down so as to drive the shielding plate to slide in the sliding groove, so that when heat dissipation is needed, the shielding plate moves upwards, and the first heat dissipation groove coincides with the second heat dissipation groove; therefore, heat dissipation of the big data scientific research platform is facilitated; and when heat dissipation is not needed, the shielding plate moves downwards, the first heat dissipation groove and the second heat dissipation groove are staggered, and the shielding plate justshields the first heat dissipation groove, so that dust prevention is achieved, and the purpose of dust prevention is achieved.

The invention discloses a computer mainframe with the dustproof and heat dissipation functions, and relates to the technical field of computers. The computer mainframe comprises a box, a first partition plate is fixedly connected between the top and the bottom of the inner wall of the box, a second partition plate and the third partition plate are fixedly connected between the left side of the first partition plate and the left side of the inner wall of the box in sequence from top to bottom, a motor is fixedly connected with the top of the second partition plate, a turbine is arranged on the surface of an output shaft of the motor in a sleeving mode, a worm is rotationally connected to the right side of the top of the first partition plate through a bearing, a rotating rod is fixedly connected to the top of the worm through a coupling, and the end, far away from the second partition plate, of the rotating rod penetrates through the box and extends to the outside of the box. According to the computer mainframe with the dustproof and heat dissipation functions, the purpose of conducting dust prevention on the computer mainframe is achieved, the phenomenon that due to the fact that dust is sucked, the interior of the mainframe box is polluted is avoided, and meanwhile the phenomenon that due to the fact that charged dust is sucked, and the short circuit of a mainboard is caused is avoided.

The present invention discloses method and apparatus for preventing dust flying in the discharging elephant trunk. By means of the air pressure difference between the discharge port of the discharging elephant trunk with higher air pressure and its feeding port, the dusty air is made to return from the discharge port to the feeding port through one communicating pipe, reducing dust flying. The present invention has simple structure, good dust flying preventing effect and environment friendship.

The invention discloses a high-efficiency energy-saving airflow crusher. A rotation shaft of a classification wheel is fixed through two supporting points, a dustproof structure is arranged at a material discharging side of the classification wheel, and a direct and non-turning material discharging structure is adopted, so the rotation speed of the classification wheel is substantially improved, the high-efficiency energy-saving airflow crusher is applicable to high-accuracy classification, and an energy-saving dustproof effect is achieved for the classification wheel. The high-efficiency energy-saving airflow crusher is further provided with a bearing dustproof structure to guarantee a safe use environment for a bearing. The framework of the classification wheel is composed of a front impeller disc, a rear impeller disc, a middle impeller disc and a connecting sleeve barrel, so that the rigidity of the classification wheel is improved. Vanes of the classification wheel comprise main vanes and auxiliary vanes, can eliminate eddies and reduce wind resistance. An air inlet pipe of a spraying nozzle is bent towards the direction near a cavity of the airflow crusher and then is connected with the spraying nozzle, so that the structure is compact. The material level height is controlled in a weighing mode, and thus the error range is reduced. The cross section of the bottom of the cavity of the airflow crusher is arc, so that the residual amount and occupied space of materials are reduced.

The invention discloses a dust-proof lens cover for a scope, which comprises: a dust-proof cover installation sleeve and a dust-proof cover; the installation sleeve is in the shape of a cylinder and matches the eyepiece barrel or objective lens barrel of the sight ; The installation sleeve is provided with a hinge seat; the end of the installation sleeve is provided with a locking outer flange; the inner side of the locking outer flange is provided with a locking inner flange receiving groove; The dust cover is disc-shaped; the dust cover includes a fixed ring, a transparent lens, and a hinged seat of the dust cover; the fixed ring is ring-shaped, and the fixed ring is provided with a transparent lens mounting groove and a locking inner flange; The transparent lens is set in the transparent lens installation groove; the inner side of the locking inner flange is provided with a locking outer flange receiving groove; the present invention is simple in structure and easy to use, and the use of the transparent lens can achieve the purpose of dustproof without hindering the aiming , does not block the line of sight; the use of torsion springs can make the dust cover pop open automatically, and the rotatable dust cover is more user-friendly and easy to use.

The invention discloses an electronic component display stand fully utilizing space. The electronic component showing stand comprises a base, one end of the base is in threaded connection with one end of a supporting rod, a first tray, a second tray, a third tray and a fourth tray are equidistantly arranged on the supporting rod sequentially from bottom to top, the top end of the supporting rod is in threaded connection with a cover plate, the surface of the first tray is of a concave structure, a groove in the surface of the first tray is divided into seven storage grooves by second partitions, the outer sides of the second tray and the third tray are connected through a transparent glass cover, and a guide rail is arranged at each of the upper end of the second tray and the bottom of the third tray. The trays are arranged, so that electronic components can be displayed in a classified manner, classified display of various products can be realized without using multiple display stands or display cabinets, and the objective of fully utilizing space is achieved while convenience and attractiveness are realized; the objective of dust prevention can be achieved due to arrangement of the cover plate.

Provided is an image acquisition module with a built-in dustproof structure, comprise an image sensing unit, a framework housing and an actuator structure. The image sensing unit comprises a bearing substrate and an image sensing wafer. The framework housing is arranged on the bearing substrate and encircles the image sensing wafer. The actuator structure is arranged on the framework housing and above the image sensing wafer, and comprises a lens holder arranged on the framework housing, and a movable lens module capable of being movably arranged in the lens holder. The internal surrounding surface of the lens holder is provided with a first surrounding structure, and the periphery of the movable lens module is provided with a second surrounding structure arranged above the first surrounding structure. The first surrounding structure of the lens holder is in cooperation with the second surrounding structure of the movable lens module so as to form a built-in dustproof structure.

The invention belongs to the technical field of vehicle parts, devices and accessories and relates to a vehicle dustproof cover. The vehicle dustproof cover comprises return springs, a reel, a vehicle front window cover, drag bars, side connecting folds, wings, a dustproof cover block, drag rings, a drag shaft, bolt ties, fastener magnetic strips, bolt tie holes, a reel block, a reel block fixing plate, drag channel fixing screws, drag channels, a motor, a drag rope, a roller, a drag rope fixing ring, a roller shaft, a roller shaft connecting bar, fixing hoops, drag rope coils, a drag rope reel, a drag rope reel gear, a transmission chain, and a motor rotor. The vehicle dustproof cover automatically pulls out the dustproof cover block in the reel block through the motor to cover a vehicle body; meanwhile, the wings of the dustproof cover block are lowered to cover the whole vehicle body for dust proofing. The dustproof cover block can be designed to have different appearances, so that the dustproof cover block is attractive, vehicle dullness is avoided and environment is beautified. The vehicle dustproof cover is simple in structure, convenient to produce and highly practical.

The invention relates to the technical field of mechanical devices and particularly relates to a cooling pump of a machine tool. The cooling pump comprises an electric motor and a pump body, wherein the pump body is connected with the electric motor, an electric motor cooling device is arranged at one end of the electric motor and is far away from the other end of the electric motor, which is connected with the pump body, the electric motor cooling device comprises a fan blade, a fan cover and a cap, the fan blade is arranged on the outer side of a rear end cover of the electric motor, the central position of the fan blade is fixedly connected with a shaft rotor of the electric motor, the fan cover is arranged on the outer side of the fan blade, the fan cover is connected with the rear end cover of the electric motor along the circumferential edge of the fan cover, and a ventilating hole is arranged at the bottom face of the fan cover. According to the cooling pump, the fan blade inside the electric motor cooling device is used for blowing, so that the electric motor which is overheated due to long-time operation is cooled down, heat dissipation is achieved finally, and the service life of the cooling pump of the machine tool is prolonged; and simultaneously, the fan cover and the cap are sequentially arranged on the outer side of the fan blade, so that the water-proof and dust-proof effect can be achieved through the cap.

The invention provides a mine air fan protection hood and discloses a protection hood device which is installed on an air fan, is capable of opening and closing following the running state of the airfan and performs protection on the air fan. The mine air fan protection hood does not need to be disassembled, does not occupy the working space and is capable of opening and closing automatically according to the running state of the air fan, and the protection effect on the air fan is effectively improved. The mine air fan protection hood is characterized in that a fixed plate is arranged insideone end of a main body tube, the two ends of the fixed plate are connected with the inner wall of the main body tube correspondingly, a fixed ring is arranged on the center portion of the fixed plate, a connection plate is arranged inside the fixed ring through a fixed bearing, the connection plate is of an annular plate-shaped structure, one side of the connection plate is provided with a magnetpiece, a rotating sleeve is arranged inside the main body tube, one end of the rotating sleeve is connected with the middle of the other side of the connection plate, the inner wall of the rotating sleeve is provided with threads, one end of a twist rod is arranged inside the rotating sleeve and is connected with the connection plate through a spring, the other end of the twist rod is arranged inside the main body tube, the twist rod is in thread coordination with the rotating sleeve, and the twist rod is provided with a plurality of sliding grooves.

The invention discloses a multifunctional keyboard and mouse device, which comprises a mouse, a keyboard, and a retractable keyboard cover hinged to one side of the keyboard. The side of the keyboard cover opposite to the keyboard is provided with a solar panel. The connecting plate, the telescopic plate and the second connecting plate are composed. The outermost telescopic plate is provided with a storage battery and a wireless power supply transmitting module, and the mouse is provided with a wireless power supply receiving module and a rechargeable battery for storing electric energy. The keyboard and mouse device of the present invention hinges a reversible keyboard cover on the traditional keyboard to achieve the purpose of dust prevention, and in the process of using the keyboard, the keyboard cover can be turned over and shrunk to form a mouse pad, realizing the integration of the keyboard cover and the mouse pad It is convenient to set and store, and saves space to a great extent. When the keyboard cover is used as a mouse pad, the mouse placed on it can be charged in real time. It has rich functions, simple structure, and convenient storage, which meets the needs of people in daily life. Diverse use requirements.

The invention discloses an automatic film covering type shoe cover machine which comprises a far infrared heating device, a pedal, spring reset devices, a motor, a driving roll, a driven roll, a control device, a drum type heat shrinkage film and a shell. A heat shrinkage film covers the upper side of the pedal, the spring reset devices are arranged below the pedal, the far infrared heating device comprises a heating type resistance wire and a heating device switch, the heating type resistance wire is wound around the pedal, and the heating device switch is arranged below the spring reset devices; the control device is connected with the heating device switch and the motor. The automatic film covering type shoe cover machine has the integral advantages that the far infrared heating device can be in a power-on state when users step on the pedal, heat can be generated by the heating type resistance wire, and accordingly the heat shrinkage film can shrink and wraps shoes; the pedal can be reset by the spring reset devices when the shoes are separated from the pedal, the far infrared heating device can be in a power-off state, signals can be transmitted to the motor by the control device, the driving roll can be driven by the motor, and the heat shrinkage film can be delivered outwardly to cover the pedal again.

The invention relates to a blanking dust-proof chute tube device for a ship loader. The blanking dust-proof chute tube device comprises a hopper of a feeding belt, wherein the bottom of the hopper is connected with a chute tube; a support is arranged at the lower part of the hopper and connected with the chute tube through flange bolts; a right-angled rack is arranged on the outer ring of the upper part of the chute tube in an extending manner; an underframe is arranged at the bottom of the chute tube; a dust cover is mounted on the outer ring of the chute tube; the top of the dust cover is locked with the right-angled rack through a gasket and a bolt; and the bottom of the dust cover is locked with the underframe through screws. The blanking dust-proof chute tube device for the ship loader improves the dust-proof performance of the blanking transition part of the ship loader and is convenient to repair.

The invention discloses an integration device for solenoid valve assembling, which can facilitate electric connection mounting of at least one solenoid valve. The device comprises an integration valveseat and at least one dustproof cover mounted on the integration valve seat, wherein the integration valve seat is provided with a shell and a circuit board mounted inside the shell and electricallyconnected with the solenoid valve; the shell is provided with at least one jack part; the jack part is provided with a first inserting area and a second inserting area; and the dustproof cover is mounted on the jack part of the integration valve seat and comprises a cover body capable of sealing one of the first inserting area and the second inserting area. The above structure can achieve the dustproof purpose and can also reduce the solenoid valve mounting error rate.

The invention discloses a surge-resistant patch board with a headlamp and a mosquito dispeller. The surge-resistant patch board comprises a shell, sockets, a power supply switch, a power-on indicator light and a surge protection apparatus; the surge protection apparatus is arranged in the shell; the patch board is provided with three groups of the sockets; baffles are arranged in the ports of each group of sockets; the baffles are connected with the upper surface of the shell through hinges; a mosquito dispelling sheet accommodating groove and a mosquito dispeller switch are arranged on the end part of the shell; an electronic heating panel is arranged on the bottom surface of the mosquito dispelling sheet accommodating groove; and the headlamp and a headlamp switch used for controlling the headlamp are further arranged on the end part of the shell. The surge-resistant patch board aims to solve the problems that the socket is singly used for performing the function of mosquito dispelling, the socket is easily filled with dust, and the surge-resistant patch board has no the headlamp in the prior art; and the purpose of the surge-resistant patch board with the headlamp and the mosquito dispeller, and with the function of dust prevention are fulfilled.

The present invention discloses a leakage switch protector based on an anti-surge structure. The leakage switch protector comprises a shell, power sockets, a power switch, a power-on indicator, and a surge protection device. The power sockets, the power switch and the power-on indicator are arranged at the upper surface of the shell. The surge protection device is arranged in the shell. The leakage switch protector also comprises sliding chutes, a protective shell and vacuum sucking cups. The sliding chutes are arranged at the front and back sides of the shell. The vacuum sucking cups are arranged at the bottom of the shell. The protective shell is formed by a front side, a back side and an upper side and is arranged in the sliding chutes. The invention aims to provide the leakage switch protector based on an anti-surge structure, the problems of easy entry of dust and inconvenient suspension of a single-phase power supply surge protector are solved, and the purposes of easy suspension and dust prevention of the single-phase power supply surge protector are realized.

A waterproof charging pile for electric vehicles comprises a charging pile body. The charging pile body is fixedly equipped with at least one charging gun rack box. The charging pile body comprises a box body and a waterproof door. The box body and the waterproof door are mounted through matching between a concave platform and a convex platform, and are sealed by a sealing ring. The charging gun rack box comprises a charging gun rack, a box body and a box body cover plate. The box body is provided with an opening in the front end, and comprises a top plate, a bottom plate, side plates, and a back plate. The box body cover plate is arranged at the opening of the front end of the box body, and is hinged to the box body. The box body cover plate is provided with a U-shaped opening in the middle, and one side of the U-shaped opening is provided with an arc avoiding slot. The charging gun rack is arranged in the box body, and comprises an upper fixed plate, a lower fixed plate and a rack holder. The end face of the rack holder is slanted from one end to the other end, and the rack holder is internally provided with a wedge-shaped groove for accommodating the end of a charging gun.

The invention discloses a method for reducing dust of feeding tube and relative device. It arranges damp baffle plate inside the feeding tube, to generate resistance to reduce the material falling speed inside the feeding tube and the discharging speed when through the outlet of feeding tube, to reduce the impact force to reduce the dust. The invention can reduce fly dust, with simple structure, easy operation and better anti-dust effect.

The invention discloses dustproof application of foam in drill hole on the surface of building. The application comprises the following steps: after the drill hole position is selected, foam is sprayed to the drill hole position to form foam pipe so as to bury work head of drilling toll; then the drilling tool is started to rotate the work head to drill hole, and the generated mud, sand and dust are absorbed by the foam pile; and finally the foam pile containing the mud, sand and dust at the periphery of the hole opening is cleaned up. The invention also discloses a sprayer which comprises an aerosol pot and a promoter, wherein the valve of the aerosol pot can be opened under the function of the promoter, so the object in the aerosol pot can be sprayed out through a nozzle to form the foam. The invention effectively solves the problems that the mud and sand splash and the dust flies in the split construction of building which pollute the environment and adjacent facilities and harm health of operator, and develops the use field of foam aerosol.

The invention discloses a stainless steel fan with a gas purification function. The stainless steel fan comprises a storage cavity, wherein a mounting base is fixedly arranged at the bottom of the storage cavity, a first screw and a second screw are arranged in the storage cavity, threads on the first screw and the second screw are reverse threads, and the first screw and the second screw are connected through a coupler; the end, away from the coupler, of the first screw is connected with the output end of a first motor, the first motor is fixedly installed on the inner wall of the storage cavity, the end, away from the coupler, of the second screw penetrates through a first bearing and extends into the first bearing, sliding blocks are in threaded connection with the outer sides of the first screw and the second screw, and first movable shafts are fixedly arranged on the surfaces of the sliding blocks; and the first movable shafts are sleeved with supporting frames, the ends, away from the first movable shafts, of the supporting frames sleeve second movable shafts, the second movable shafts are fixed to a connecting block, the top of the connecting block is fixedly connected witha lifting plate, and a fixing base is fixedly arranged at the top of the lifting plate. The stainless steel fan has the beneficial effects that the working environment is greatly improved, and the health of workers is protected.

The invention relates to the technical field of communication equipment, and further discloses a dustproof mechanism for the communication equipment. The dustproof mechanism includes a shell; an antenna is fixedly mounted at the top of the shell; a knob located on the right side of the antenna is fixedly installed on the top of the machine shell. A soundboard is fixedly installed on the front faceof the shell, a sound hole is formed in the front face of the soundboard, a sleeve is fixedly installed on the right side wall of the shell, a sliding hole is formed in the sleeve, a sliding shaft ismovably installed in the sliding hole, and a brake button with one end penetrating through and extending to the top of the machine shell is fixedly installed at the top of the sliding shaft. The dustproof mechanism for communication equipment has the advantages of being dustproof and the like, and solves the problems that in the using process of an existing interphone, due to the fact that most interphones are applied to the industries of construction sites, catering, military affairs and the like, the working environment faced by the interphones is often in a place with large dust, the dusteasily enters a machine body through a conversation hole, and the interphones are damaged or cannot work normally.

The invention discloses a high-stability big data acquisition device which comprises a box body. A circular plate is slidably connected to the bottom of an inner cavity of the box body, a first bevelgear is fixedly connected to the side wall of the circular plate, and a second bevel gear is engaged with the right side wall of the first bevel gear; a servo motor is installed at the bottom of the inner cavity of the box body, the output end of the servo motor is fixedly connected with the second bevel gear, and a first cylinder is slidably connected to the top of the circular plate; two spiralgrooves are formed in the inner wall of the first cylinder, transverse plates are fixedly connected to the left side wall and the right side wall of the first cylinder, and the sides, away from each other, of the two transverse plates are fixedly connected with the left inner wall and the right inner wall of the box body. The first cylinder sleeves a second cylinder, and Z-shaped through grooves are formed in the front side wall and the rear side wall of the second cylinder correspondingly. Through the mutual cooperation of the box body, the servo motor, the circular plate, the first cylinderand the like, the servo motor can drive a body to ascend and descend, the purpose of height adjustment is achieved, and therefore the use efficiency of the device can be effectively improved.

The invention provides an optical-principle based dust sensor with a dust prevention function. The optical-principle based dust sensor comprises an upper shell, a lower shell, a guide line connector,a connector protection component and an internal dust prevention component. The upper shell is mounted at the upper end of the lower shell. The guide line connector is formed in the right end face ofthe upper shell. The connector protection component is provided with a guide line connector position, and is mounted on the right end face of the upper shell. The internal dust prevention component isassembled in the lower shell. The connector protection component comprises a fixing frame, a sleeve, a micro heat-radiating fan, a mounting groove, a connection rod, a push rod, an annular sliding groove and an arc-shaped plate. The internal dust prevention component comprises an air flow channel, a limiting platform, a carrying platform, a positioning rod, a spring piece, a moving rod, a movinggroove, a roller and a cleaning block. Compared with the prior art, the optical-principle based dust sensor has the advantages that dust prevention and heat radiation of the guide line connector are realized, internal dust prevention of the sensor is also realized, and dust is prevented from adhering to photosensitive elements to reduce sensitivity.

A waterproof charging pile for electric vehicles comprises a charging pile body. The charging pile body is fixedly equipped with at least one charging gun rack box. The charging pile body comprises a box body and a waterproof door. The box body and the waterproof door are mounted through matching between a concave platform and a convex platform, and are sealed by a sealing ring. The charging gun rack box comprises a charging gun rack, a box body and a box body cover plate. The box body is provided with an opening in the front end, and comprises a top plate, a bottom plate, side plates, and a back plate. The box body cover plate is arranged at the opening of the front end of the box body, and is hinged to the box body. The box body cover plate is provided with a U-shaped opening in the middle, and one side of the U-shaped opening is provided with an arc avoiding slot. The charging gun rack is arranged in the box body, and comprises an upper fixed plate, a lower fixed plate and a rack holder. The end face of the rack holder is slanted from one end to the other end, and the rack holder is internally provided with a wedge-shaped groove for accommodating the end of a charging gun.

The invention relates to the technical field of computer equipment and discloses a computer display convenient to use. The computer display comprises a first motor and is characterized in that the output end of the motor penetrates a first bearing to be fixedly connected with a screw rod, one end of the screw rod is fixedly connected into a second bearing, a connecting block is connected to the surface of the screw rod in a threaded manner, a rotating device is fixedly connected to the top end of the connecting block, the rotating device comprises fixed blocks, a third bearing is fixedly connected to one side of each fixed block, a rotary shaft is rotatably connected in the third bearings, and a driven gear is fixedly connected to the middle of the rotary shaft. The computer display has the advantages that the computer display is provided with the first motor, the first bearing, the screw rod, the second bearing and the connecting block, the motor drives the screw rod to move in the first bearing and the second bearing which are located at two ends so as to drive the connecting block to move leftwards and rightwards, the horizontal positions of the connecting block can be adjustedconveniently, and the horizontal positions of a display body can be adjusted conveniently.