126results about How to "Not easy to bump" patented technology

The invention discloses a new structure transformer, which belongs to the energy conversion installment. It completely avoids the welding, the big vice-side electric conduction area can realizes the output of the big electric current, the big cooling surface, the good radiation effect, the simple structure, the convenient service. The technical characteristic of the invention is that it includes the ferrite core, the primary side winding, vice-side, the vice-side is composed of left place body and the right place body, the left groove and the right groove separately opened on the left place body and the right place body, the left groove divides the left place body into the left stele and the left outside place body, the left stele and the left outside place body are connected in the base; the right groove divides the right place body into the right stele and the right outside place body, the right stele and the right outside place body are also connected in the base; the iron core placed in the groove, the primary side winding rolled around the iron core, the insulating layer has separately establishes between the primary side winding and the vice-side winding, between the primary side winding and the iron core.

The invention belongs to the technical field of cultural medium, and particularly relates to efficient publishing equipment for audio and video products for cultural medium. The efficient publishing equipment for audio and video products for cultural medium is time-saving and labor-saving, is good in publishing effect and can attract people's eyes well. In order to solve the technical problems, the invention provides the efficient publishing equipment for audio and video products for cultural medium. The efficient publishing equipment for audio and video products for cultural medium comprises a shell, connecting rods, wheels, a left-right moving device, a moving plate, a projection, a lifting device and the like; the connecting rods are symmetrically arranged at the bottom of the shell in the left-right direction; the top ends of the connecting rods are connected with the bottom of the shell in a bolt connection manner; a wheel is rotatably mounted at the bottom end of each connecting rod; and the left-right moving device is arranged in the shell. By left-right swing and vertical movement in different degrees of a publishing board, the publishing force can be increased, and therefore, the efficient publishing equipment can successively attract people's eyes.

The invention relates to a natural gas pipeline overhaul tool cleaning device, in particular to a natural gas pipeline overhaul tool special cleaning device convenient to move. The technical problem to be solved is to provide the natural gas pipeline overhaul tool special cleaning device which saves time and labor, is good in cleaning effect, easy to operate and high in work efficiency and is convenient to move. In order to solve the technical problem mentioned above, the natural gas pipeline overhaul tool special cleaning device convenient to move is provided and comprises a cleaning box and the like. A cleaning device is arranged on the top in the cleaning box. A water outlet hole is formed in the middle of the bottom of the cleaning box. A water spray device is arranged on the right side of the top of the cleaning box. A water spray part of the water spray device is located in the cleaning box. According to the natural gas pipeline overhaul tool special cleaning device, by means of wheels, the position of the natural gas pipeline overhaul tool special cleaning device can be conveniently moved, telescopic rods and sleeves are matched, a buffer effect is achieved through springs, and the effects that time and labor are saved, the cleaning effect is good, operation is easy and the work efficiency is high are achieved.

The invention relates to a fixing device, in particular to a shockproof new energy automobile battery fixing device. The objective of the invention is to provide the shockproof new energy automobile battery fixing device which can effectively fix a battery and prevent bumping, and has a heat dissipation effect. The shockproof new energy automobile battery fixing device comprises a base, wherein anouter frame is installed on one side of the base; a side plate which is mounted on the outer frame in a sliding manner; and a bottom damping mechanism which is mounted on the base and used for damping and limiting the bottom of the battery. The side plates are pulled to move upwards to be separated from the outer frame, then the bottom damping mechanism is pressed to move downwards, the clampingmechanism is pulled to operate, then the battery is placed in the bottom damping mechanism, and when the battery is placed at a proper position, the clamping mechanism is loosened, and then the bottomdamping mechanism and the clamping mechanism limit the battery. And the battery of the new energy automobile can be effectively fixed and is not easy to bump.

The method for mounting a rotor of a large-sized synchronous motor includes steps of heightening a stator, laying a rail used for the rotor to penetrate through, mounting a guide limiting device of a rotor front bearing seat support on the rail, mounting limiting chain blocks and the like. The device for mounting the rotor of the large-sized synchronous motor comprises the rail, the rotor front bearing seat support, the guide limiting device of the rotor front bearing seat support, a positioning device and a drawing device. When a rotor of a roughing main motor is mounted according to the method and by the device, the motor rotor and the stator are less prone to collide with each other under the action of the guide limiting device and the positioning device, insulation loss caused by damages of coil insulation layers can be avoided, and mounting process is safe and reliable, so that motor mounting quality is guaranteed.

The invention relates to the technical field of vehicles, and particularly discloses an electric bicycle including a battery box, a battery compartment and a controller, the battery compartment is used for mounting the battery box and a controller, and an electronic lock electrically connected to the controller is fixedly arranged in the battery compartment, the side wall of the battery box is provided with a lock hole, and a lock cylinder of the electronic lock can penetrate into the lock hole or is separated from the lock hole, so that the battery compartment and the battery box are locked or unlocked. According to the electric bicycle, the electronic lock is disposed on the lower portion of the battery compartment, the lower end of the battery box is provided with a cavity matched withthe electronic lock, so that the electronic lock locks the battery box and the battery compartment without being exposed, the security performance is high, and the antitheft performance is high. An opening of the battery compartment is upwards, the battery box is mounted in the battery compartment from top to bottom, and it is easy to pick up or place a battery.

The invention discloses an electrode leading structure of a battery or a super capacitor, which comprises an end cover. The end cover is hermetically fixed at the opening of the electrode end of a battery or capacitor outer casing. A terminal is inserted in the middle of the end cover, and the top end of the terminal extends out of the end cover. The bottom of the terminal is fixedly provided with a stop edge which is used for preventing the terminal from falling, and the top is respectively provided with a terminal leading end and a hollow flanging structure which is arranged around the terminal leading end. An insulation and sealing sleeve is clamped between the terminal and the end cover, and is sleeved on the terminal for sealing the terminal. The invention also discloses an electricity storage electric element which adopts the electrode leading structure. The electrode leading structure adopts a split structure of the terminal and the end cover; one insulation and sealing sleeve is used for sealing and insulating when the terminal is assembled; the flanging structure is sealed and compressed after being flanged; the sealing structure is simple, and is convenient and rapid in installation; and the sealing part is arranged around the terminal, so that the sealing and insulation material is saved.

A hard suitcase comprises a frame body and case cover, wherein the case cover comprises a flat bottom surface and four bending surfaces; the flat bottom surface and the bending surfaces are integrally formed and the four bending surfaces are in the same plane with the flat bottom surface before the bending surfaces are bent; the flat bottom surface is the bottom surface of the case cover; after being bent, the four bending surfaces are matched with the frame body to form a vertical plane at the height of the case cover. The manufacturing method of the hard suitcase comprises the manufacture of the frame body and the case cover; the manufacturing processes of the case cover comprises the following steps: firstly, a flat sheet material is cut into a flat bottom surface and four bending surfaces; then the four bending surfaces are bent into four vertical planes at the height of the case cover; finally, the frame body and the case cover are assembled. The hard suitcase and the manufacturing method thereof have the characteristics that the waste is less, the procedures are simple and required devices are simple.

The invention relates to a rotating disk type dish washing machine. The rotating disk type dish washing machine comprises a box body, a dish rack, a water spraying mechanism and a dish washing mechanism; the box body is of a hollow structure and is provided with a water filling nozzle and a water outlet; the water spraying mechanism is arranged in the box body and communicated with the water filling nozzle; the dish washing mechanism is arranged in the box body; the dish washing mechanism comprises a hollow inflatable rod, an inflatable portion and a brush body, wherein the inflatable portion is connected with the inflatable rod and the brush body is arranged on the inflatable portion; the dish rack comprises a plurality of storage disks, a plurality of connecting rods and a plurality of rotating disks; the dish rack is arranged in the box body; the rotating disks are arranged in the box body in a rotating mode; every connecting rod is arranged on the corresponding rotating disk along the periphery of the rotating disk; every storage disk is arranged on the corresponding rotating disk and arranged towards the dish washing mechanism; the plurality of storage disks are parallel to each other; one ends of the storage disks, which are connected with the connecting rods respectively, are aligned to each other. During usage, the cleaning can be thorough and the use can be flexible.

The invention relates to a prestressed concrete rod section with the two ends in inner flange connection. The prestressed concrete rod section comprises a prestressed concrete rod body and connecting flanges which are arranged at the two ends portions of the prestressed concrete rod body. The prestressed concrete rod section is characterized in that the connecting flanges which are arranged at the two ends portions of the prestressed concrete rod body are respectively steel inner flanges which are provided with an inner protection ring and an outer protection ring, connecting bolt holes and step holes are evenly formed in the periphery directions of the steel inner flanges provided with the inner protection ring and the outer protection ring, the inner protection ring and the outer protection ring are connected through a rib plate or a steel rib and are pre-buried at the two ends of the prestressed concrete rod body, the outer protection ring is arranged flush with the outer surface of the prestressed concrete rod body, and the two end heads of a prestressed main rib are directly anchored in the step holes of the inner flanges. The prestressed concrete rod section has the advantages that the rob body which is connected through the steel inner flanges is smooth and attractive in appearance, bumping cannot not happen easily, and the steel inner flanges with the inner protection ring and the outer protection ring are firmly connected with the prestressed concrete rod body.

The invention discloses a piezoelectric ceramic loudspeaker, which comprises a front cover plate. A vibrating diaphragm, a metal thin film, a piezoelectric ceramic plate and a flexible circuit board are sequentially arranged in the front cover plate; the piezoelectric ceramic plate is matched with a sound penetrating cavity; a rear cover plate is matched with the front cover plate to press the vibrating diaphragm, the metal thin film and the flexible circuit board between the two cover plates; one side of the flexible circuit board is pressed on one side of the piezoelectric ceramic plate and connected with the side of the piezoelectric ceramic plate; the rear cover plate on one side, where the flexible circuit board is pressed, is provided with an opening; and the flexible circuit board at the opening is provided with a wiring point. The piezoelectric ceramic loudspeaker has the advantages that: the structure is simple, compact and beautiful; the piezoelectric ceramic plate is not directly contacted with the exterior during the installation and use; the piezoelectric ceramic plate is protected well and difficult to collide; the service life of the piezoelectric ceramic plate and the service life of the piezoelectric ceramic loudspeaker are prolonged; and convenient and stable crimp connection between the piezoelectric ceramic plate and the metal thin film and good sound conversion effect are ensured; therefore, the product quality of the piezoelectric ceramic loudspeaker is improved greatly.

The invention discloses a measuring tool which comprises a filler gauge, a body, a first pressing part and a second pressing part, wherein the body is a cylinder; a blind hole is formed at one end of the body along an axis direction; a plane which is vertical to an axis of the body is arranged at the bottom of the blind hole; the second pressing part is arranged at the bottom of the blind hole; at least one rectangular hole which passes through the blind hole from the surface of the body is formed on the body; the filler gauge is inserted into the rectangular hole and is locked at the bottom of the blind hole by the first pressing part through the second pressing part; and preferably, the first pressing part is a tightening bolt, the second pressing part is a pressing block, a convex arc-shaped surface is arranged at one end of the pressing block facing to the bolt, and a plane is arranged at one end of the pressing block facing to the bottom of the blind hole. When the measuring tool provided by the invention is used for measuring a gap in an inner cavity, the problems of lower accuracy and efficiency caused by an operation of manually inserting the filler gauge into the inner cavity and the easily blocking problem of the filler gauge caused by inconvenient operation and the like are solved.

The invention discloses a stair climbing device. The device comprises a chassis, a running wheel, a stair climbing wheel, a push-pull mechanism with two ends respectively hinged at the chassis and theslewing frame and a driving mechanism, a first end of the chassis is hingedly provided with a slewing frame, a hinge shaft is horizontal and perpendicular to the moving direction of a stair climbingdevice body, the movable end of the driving mechanism is connected to the running wheel, the driving mechanism is in one-to-one correspondence with the running wheel, and the running wheel and the stair climbing wheel are driven by a drive mechanism; the running wheel is installed on the slewing frame, the stair climbing wheel is mounted on the chassis, or the running wheel and the stair climbingwheel are all mounted on the slewing frame, or the running wheel is mounted on the chassis, and the stair climbing wheel is mounted on the slewing frame; under the push-pull action of the push-pull mechanism, the slewing frame swings, and the alternate landing of the running wheel and the stair climbing wheel can be achieved; a rotating wheel is further included, and a rotating shaft of the rotating wheel is parallel to the hinge shaft of the slewing frame. The device has the advantages that the structure and the principle are simpler, and the movement is flexible and reliable.

The invention relates to a safety reminder device, and especially relates to a safety reminder device for urban construction. The safety reminder device is obvious in reminder, convenient to move, andcapable of making a reminder board be not easily damaged and reducing the economic losses. In order to solve the technical problem, the safety reminder device for urban construction comprises a baseboard, legs, a housing, a lifting device, a vertical bar, the reminder board, shielding devices and the like. The legs are vertically installed at the top of the base board in bilateral symmetry in abolt connection way. The tops of the legs are in bolted connection with the housing. The lifting device is arranged on the inner bottom plate of the housing. The vertical rod is connected to a liftingcomponent of the lifting device. The reminder board is in bolted connection to the top end of the vertical rod. The safety reminder device for urban construction has the advantages of being obvious in tips, convenient to move, and capable of making the reminder board be not easily damaged and reducing the economic losses.

The invention relates to deburring equipment for a brake clutch disc, in particular to efficient deburring equipment for a brake clutch disc. The efficient deburring equipment for the brake clutch disc is easy and convenient to operate, convenient to use, good in deburring effect and convenient to move. The efficient deburring equipment for the brake clutch disc comprises a base plate and the like. The top of the base plate is provided with a rotary device and a storage table. The rotary device is located on the left side of the storage table. A rotary part of the rotary device is connected with a top plate which is horizontally arranged. The middle of the bottom of the top plate is provided with a lifting device. A lifting part of the lifting device is connected with a grinding block. The efficient deburring equipment is quite conveniently moved to a destination through wheels, the brake clutch disc needing to be deburred does not need to be carried by spending a large amount of manpower, and therefore working efficiency is extremely high.

The invention discloses a household fishing equipment accommodating box which comprises an accommodating box body; a cover plate is arranged at the top of the accommodating box body; a bottom plate, a center plate and a top plate are arranged in the accommodating box body in sequence from bottom to top; first telescopic poles are arranged at four corners at the top part of the bottom plate, the top end of each of the first telescopic poles is fixedly connected with a second telescopic pole; the four corners of the center plate are all fixedly connected at the joints of the first telescopic poles and the second telescopic poles; four corners at the bottom of the top plate are all fixedly connected with the top ends of the second telescopic poles. The household fishing equipment accommodating box disclosed by the invention can effectively avoid the generation of fishy smell or musty taste and the propagation of bacteria, ensure a fresh air environment in a room and prevent mice from biting fishing equipment and eating baits; the fishing equipment is convenient to take, easy to distinguish and difficult to collide; the household fishing equipment accommodating box is high in safety, can quickly finish and place valuable fishing equipment and has better accommodating performance for the fishing equipment with different lengths.

The invention provides a sintering method for a powder metallurgy brake pad. The sintering method comprises the steps that at least one high-temperature-resistant tray is provided, at least one cavityis formed in each high-temperature-resistant tray, a bottom face and an avoiding structure are arranged in each cavity, and the avoiding structures contain protruding structures and cylindrical coreson avoiding back plates; the high-temperature-resistant trays are installed in a sintering furnace in a reducing gas atmosphere; the brake pad obtained after cold press molding is placed in the cavities; at least one pressing plate is provided; the pressing plates are placed in the cavities above friction blocks; pressure acts on the pressing plates so that the pressing plates can press the friction blocks, and the pressure is maintained within a set temperature range; and the high-temperature-resistant trays and the brake pad are slowly cooled together, and then the brake pad is taken out ofthe high-temperature-resistant trays. According to the sintering method for the powder metallurgy brake pad, the product performance and quality are effectively improved, and the product consistencyand reliability are guaranteed.

The invention discloses an intelligent braking device for a stroller, which comprises a main body of the stroller, a moving wheel, a detection device and a braking device. The moving wheel rotates through a rotating shaft. The device includes an electric telescopic rod, a brake pad, a mounting seat and a telescopic motor. The mounting seat is installed at the bottom of the blocking plate, and the top of the electric telescopic rod is installed at the bottom of the mounting seat. The electric telescopic rod is controlled by the telescopic motor. A protective block is connected, a groove is provided on the surface of the moving wheel, and a separating metal plate is arranged inside the groove, and the brake pad is installed on the side of the moving wheel. The detection device includes a speed sensor, a signal converter and an AT89C51 single-chip microcomputer. The speed is used to realize the automatic braking of the cart. The braking is fast and efficient, which effectively prevents the occurrence of accidents, and has a good cushioning effect. It is not easy to bump when braking, and it is more comfortable to use. It is worth promoting.

The invention discloses a bracket fixing device for an automobile battery base, which comprises a bottom plate, a back plate is installed on the rear side of the bottom plate, a top plate is installed on the top of the back plate, and the left and right ends of the front side of the top plate are A top cylinder is installed, and the interior of the inner cylinder is connected with clamping plates, side plates are fixedly installed on the left and right sides of the top of the bottom plate, and push plates are arranged on the inside of the side plates. The car battery base bracket fixing device, through the cooperation of the push plate, the clamping plate and the inner cylinder, uses the fastening bolts to pass through the top cylinder and the square block in turn and then thread the nut to fix it. At this time, the elastic return force of the tension spring Stretching clamp moves inward to pull back and fix the battery, and initially stabilizes the battery. When the adjusting screw moves forward, it pushes the push plate to move inward and pushes and fixes the inner battery. Internal shaking caused bumps, and its actual use effect is very ideal.

A lifting locating pin comprises a locating seat which is fixed to a bottom plate, wherein the locating seat comprises a barrel; a flange which outwards protrudes and is used for being fixed with the bottom plate is arranged on the outer wall of the barrel; a lifting pin sleeve is mounted in the barrel of the locating seat; a locating pin is inserted into the upper end of the lifting pin sleeve; two vertical guide slots which are symmetrical with respect to the central axis of the barrel are formed in the barrel and above the flange of the locating seat; two assembly holes are formed in positions, corresponding to the lower parts of the vertical guide slots, of the lifting pin sleeve; a rotating ring sleeves the outside of the barrel part above the flange of the locating seat; two spiral guide slots are correspondingly formed in the inner wall of the rotating ring; a bayonet lock is inserted into the vertical guide slots and the two assembly holes of the lifting pin sleeve; two ends of the bayonet lock are arranged in the spiral guide slots in the inner wall of the rotating ring. According to the invention, a workpiece clamping problem on a workpiece processing line is solved, time is saved, the work efficiency is improved, the product quality is ensured, bump is effectively prevented, and the lifting locating pin is particularly suitable for one-face two-pin location of a heavy product with a relatively large size.

The invention relates to an electrostatic powder spraying trolley which comprises a base with wheels and a frame fixedly mounted on the base, wherein the frame is inversely U-shaped; sliding brackets capable of moving up and down along the frame are arranged on two vertical columns in a sleeving manner; cantilever beams are mounted on the two sides of each sliding bracket; sprayers are mounted on the cantilever beams; a spiral screw rod lifter is arranged between the two vertical columns of the frame on the base; transmission rods mounted in a sliding pair supporting seat are arranged between the spiral screw rod lifter and the cantilever beams; the sliding pair supporting seat is mounted on the inner side of one vertical column of the U-shaped frame. The trolley is used for mounting a terminal sprayer in a multi-branch-path external arranged electrostatic powder spraying device onto mobile machinery capable of respectively swinging in the vertical direction or swinging in the transverse direction and is large in electrostatic powder spraying amount; therefore, sprayers can be tidily and tightly arrayed and moved integrally.

The invention relates to a pressing frame and discloses a belt pulley adjusting device. The belt pulley adjusting device comprises a machine frame, a driven pulley and a driving pulley, wherein the driving pulley is rotatably connected to the machine frame; a first supporting seat is connected to the machine frame in a sliding manner; the driven pulley is rotatably connected to the first supporting seat; one side of the first supporting seat, which is far away from the driving pulley, is connected to a rack which is meshed with a gear; a sliding bar is connected to the machine frame between the first supporting seat and the driving pulley in a sliding manner; an elastic part is connected between the sliding bar and the first supporting seat; a threaded rod is connected to the siding bar and is in threaded connection with the machine frame; and one side of the threaded rod, which is far away from the sliding bar, is in threaded connection with a nut. Compared with the prior art, the belt pulley adjusting device has the advantages that the driven pulley is adjustable, so that the tightness of a belt can be adjusted in a relatively large range, thereby improving the stability of the whole conveying belt.

The invention relates to physical experiment apparatus display equipment, in particular to physical experiment apparatus display equipment for physics education. The physical experiment apparatus display equipment can comprehensively display experiment apparatuses, is good in display effect, enables the experiment apparatuses to be less prone to being damaged and reduces economic loss. The physical experiment apparatus display equipment comprises a display box, moving devices, a first rotating device and a first placement frame, the display box is a transparent display box, the moving devicesare arranged at the bottom of the display box in left-right symmetry, and the first rotating device is arranged at the bottom in the display device. The first placement frame is driven to rotate through the first rotating device, and a second placement frame is driven to rotate through a second rotating device, so that in this way, two experiment apparatuses can be displayed comprehensively at thesame time, and comprehensive display of the experiment apparatuses and good display effect are realized.

The invention discloses a multifunctional computer displayer. The multifunctional computer displayer comprises a base, a storage box, hooks, a displayer, ventilation holes, drying devices, a rear cover, a rotating hinge, side plates, a supporting leg, hook grooves, a fixing device and a handle. The back of the displayer is the rear cover, the ventilation holes are formed in the side plates on the left and right sides of the rear cover respectively, the drying devices are arranged inside the rear cover, the rotating hinge clamped inside the rear cover is arranged in the center of the rear cover and connected with the supporting leg, and the supporting leg is connected with the base at the bottom. The multifunctional computer displayer is reasonable in design, diversified in function and capable of rotating in any direction, the view field is wide, and displaying is convenient; because the drying devices arranged inside the rear cover can dry gas inside the displayer, the probability of displayer screen blurring caused by wet gas is lowered greatly, and the service life of the displayer is prolonged.

The invention belongs to the technical field of stacking machines, and particularly relates to an automatic unloading stacking machine for a logistics warehouse. Comprising a mechanical arm, a conveying frame and a controller, the conveying frame is installed below the tail end of the mechanical arm, an opening is formed in one side of the front face of the conveying frame, fixing columns are arranged on the two sides of the conveying frame, a bottom plate is slidably connected to the bottom of the conveying frame, and an electric push rod for driving the bottom plate is fixedly connected to one side of the back face of the conveying frame; the controller is used for controlling the operation of the stacker crane; in order to solve the problems that in the transportation process of the stacker crane, goods fall off and are not protected, by arranging the transportation frame, materials are placed in the transportation frame during stacking, so that the materials are not prone to falling off, the materials are prevented from being damaged, in the process of moving the materials to be stacked, the materials are not prone to colliding in the transportation frame, and the safety of the stacker crane is improved. The materials are further protected from being damaged, and the stacking safety is improved.

The invention discloses a hanging mechanism and particularly relates to a pulley conveying and hanging mechanism. The pulley conveying and hanging mechanism comprises a U-shaped groove, wherein two groove walls of the U-shaped groove are provided with saw-shaped teeth; an insertion hole is formed in one of the groove walls, an arc-shaped ear plate is placed into the insertion hole and is in threaded connection with a stamped nail, and the length direction of the stamped nail of the arc-shaped ear plate is consistent with the direction of a connecting line between the two groove walls; the arc-shaped ear plate is rotationally connected to the other groove wall; a bar-shaped hole is formed in the arc-shaped ear plate, and a stud is hung in the bar-shaped hole of the arc-shaped ear plate and is hung at the bar-shaped hole through a ring body; and a locating cylinder is arranged on the other groove wall of the arc-shaped ear plate, the locating cylinder of the arc-shaped ear plate is located above the stud and is internally provided with an internal thread in screw thread fit with the stud. By using the pulley conveying and hanging mechanism, the technical defect of angle regulation inconvenience or location unstability of a pulley on a conveying line in the prior art is overcome; and the pulley conveying and hanging mechanism is capable of realizing angle control and stable location.

The invention discloses a bionic dazzle light type table tennis table and an assembling method thereof. The bionic dazzle light type table tennis table comprises a stable surface, a net and a base, wherein the base is arranged at the bottom of the table surface and comprises a supporting column and four supporting plates, the supporting column is arranged in the middle of the base, the supportingplates are arranged to surround the supporting column and are respectively of a bionic model, the supporting column is connected with the table surface through a connecting frame, and the bottom of the table surface is butted to the top of the supporting plates. The bionic dazzle light type table tennis table is novel in structure, and the supporting plate is arranged into a bionic model, so thatthe aesthetic degree can be increased, and vanpidity is avoided; and the supporting plates are hinged with the supporting column through vertical rotating shafts, a triangular active movement region is formed between every two adjacent adjusting plates through surrounding, and the supporting plates can be folded during transportation or storage, so that the storage space is reduced.