46results about How to "There will be no dumping" patented technology

The invention relates to a cabinet body, in particular to an intensive earthquake-resistant storage cabinet for cultural relics. The intensive earthquake-resistant storage cabinet for the cultural relics comprises a plurality of storage cabinet bodies; locking shafts are respectively and fixedly connected with shifting sheets; each cabinet body is fixedly provided with at least one set of a buckling device and a neck, wherein the buckling device is convenient for fixing the two adjacent cabinet bodies, and the neck is used for being matched with the buckling device; each buckling device comprises a box and a locking tongue arranged in the box; each locking tongue comprises a passive segment and an active segment; one end, passing through the side wall of the corresponding box, of each passive segment is provided with a bending segment clamped on the corresponding neck; a revolving shaft fixedly arranged in the corresponding box is arranged at the joint of each passive segment and the corresponding active segment; each revolving shaft is provided with a torsional spring; one end of each torsional spring is arranged on the inner side wall of the corresponding box, and the other end of each torsional spring is clamped on the corresponding active segment; the tail end of each active segment is connected with the corresponding shifting sheet through a driving rope. According to the intensive earthquake-resistant storage cabinet for the cultural relics, disclosed by the invention, when an earthquake occurs, all the storage cabinets can be buckled together through the buckling devices, so that the phenomenon that the storage cabinets incline when being subject to violent vibration cannot occur, and the safety of the cultural relics is protected to the maximum degree.

The invention discloses a vein filter, which comprises a tapered first filter net, a tapered second filter net and a connection segment, wherein one end of the first filter net is gathered at one point and the other end expands to form a plurality of first support end parts; one end of the second filter net is gathered at one point and the other end expands to form a plurality of second support end parts; the connection segment comprises a plurality of first connecting rods and a plurality of second connecting rods; two ends of each first connecting rod are connected with the corresponding first support end part and the second filter net separately; and two ends of each second connecting rod are connected with the corresponding second support end parts and the first filter net separately. The vein filter is good in structure stability, small in contact surface with a blood vessel wall, high in thrombosis capture ability and easy to recover.

The invention discloses a forest tree transplanting mechanism capable of protecting a soil ball root system. The forest tree transplanting mechanism includes a horizontal tree digging platform, wherein a first horizontal support arm and a second horizontal support arm which extend forwards are symmetrically arranged on the left and right of the front of the tree digging platform, a root-protectingsoil ball-cutting mechanism is installed between the first horizontal support arm and the second horizontal support arm, and the root-protecting soil ball-cutting mechanism can be used for cutting soil at the root of a to-be-dug tree into a hemispherical root-protecting soil ball. The forest tree transplanting mechanism has a simple structure, and periodic forward-reverse intermittent rotation inthe soil is performed by a plurality of cutting teeth together with the forest tree transplanting mechanism, so that the soil at the cutting teeth is cut back and forth like a sawtooth knife, and thesoil is cut smoothly when the third arc section of an arc-shaped soil cutting blade is fed in the soil; and the trunk of the to-be-dug tree is clamped tightly between a first clamping piece and a second clamping piece, and the to-be-dug tree has no inclination in the subsequent soil cutting process.

The invention relates to a fan blade for a floor fan, which includes a front net cover, a fixed chassis, a motor, a rear net cover, a fan blade fixing seat, a fan blade and a fan cable nut, and both sides of the inner bottom of the fixed chassis are installed with A counterweight, and a base column is vertically installed at the middle position of the top of the fixed chassis, a fastening snap ring is installed on the top of the base column, and a telescopic support rod is vertically installed inside the base column to pass through the fastening snap ring . The present invention installs the fan blade fixing seat, the fan blade cable nut, the threaded screw rod, the fixing nut and the second fixing screw hole. When in use, the fixing nut is screwed to loosen the threaded screw rod, and then the fan blade fixing seat is turned to adjust the angle. Tighten the fixing nut so that the fan blade can adjust the angle at any time, which is convenient and quick. At the same time, the device is equipped with a counterweight to enhance the stability of the device and prevent the phenomenon of tipping due to an unstable center of gravity.

The invention discloses a pen container capable of being lifted automatically. The pen container capable of being lifted automatically comprises a body. The body comprises a first pen container body, a second pen container body, an insertion plate and a sliding block, wherein the second pen container body is arranged below the body; a hydraulic cylinder is arranged in the second pen container body; a hydraulic rod is arranged on the output portion of the hydraulic cylinder; the insertion plate connected with the top of the hydraulic rod is arranged inside the first pen container body; the inner wall of the first pen container body and the inner wall of the second pen container body are each provided with a layer of sliding rails; the outer wall of the body is provided with a protection layer; a ruler slot is formed between the protection layer and each sliding rail; a plurality of containing boxes are arranged at the bottom of the first pen container body; a rotary shaft is arranged on the top of the first pen container body; and the rotary shaft and an end cap are connected. The pen container capable of being lifted automatically has the advantages of being reasonable in structural design, convenient to use and the like.

The invention discloses a medical nursing bed. The nursing bed comprises a head board, a mattress, an adjustable bed board, a bed frame, a bed tail board, an inflation pump, a camera, a display screenand a control panel; the head board is arranged at the head end of the bed frame, and the mattress is directly put in a mattress tank in the adjustable bed board; the tail end of the adjustable bed board is welded to the bed frame, the bed tail board opposite to the head board is arranged at the tail end of the bed frame, the display screen is installed on the inner side of the bed tail board, and the camera is installed at the top of the bed tail board; a first airbag opposite to the head of the human body, a second airbag opposite to the waist of the human body and strip-type third airbagsarranged on the two sides of the mattress are inlaid in the mattress, the first airbag, the second airbag and the third airbags are separately connected with the inflation pump through one air pipe, and when the third airbags protrude after being inflated, it can be avoided that the human body falls towards the two sides during ascending of the back; the medical nursing bed can ensure that when the posture of a patient is adjusted, the patient cannot fall down, and further has the advantages of a simple structure and low cost.

The invention relates to an outdoor anti-overflow pot which comprises a pot body. The outdoor anti-overflow pot is characterized in that the upper end of the pot body is covered with a pot cover, a bucket body is arranged at the upper end of the pot cover, a vertical rod penetrates through the upper wall of the bucket body, a disk and a ball are arranged at the upper end and the lower end of the vertical rod respectively, a first spring sleeves the vertical rod, overflow openings are evenly distributed in the lower end of the side wall of the bucket body, a guide hose is installed at each overflow opening, each guide hose is composed of an upper pipe body and a lower pipe body which are integrally formed, a notch is formed in the upper end of each upper pipe body, overflow grooves are evenly distributed in the pot cover in the radius direction of the pot cover at intervals, each lower pipe body is attached to the corresponding overflow groove, a collecting groove is formed in the outerside wall of the pot body, and a discharge port is formed in the outer side end of the collecting groove. The outdoor anti-overflow pot is scientific and reasonable in structural design, has the advantages of being convenient to use, capable of preventing food from overflowing, convenient to clean, good in thermal insulation property and easy to obtain, and is a high-innovativeness outdoor anti-overflow pot.

The invention discloses a cup saucer which comprises a supporting base, a supporting ring for accommodating a water cup is arranged on the supporting base, a heat insulating pad is arranged on the upper surface of the supporting base, and a suction cup is further arranged on the lower face of the supporting base. The cup saucer has the advantages that when the cup saucer is used, the cup saucer is arranged on a table firstly and is fixed through the suction cup, a water cup filled with drinks is placed on the cup saucer, other tasks at hand can be done safely, even if the cup is knocked carelessly, and due to the fact that the cup is in the cup saucer, the cup saucer is fixed to the table, the situation that the cup falls off cannot occur. The cup saucer is safe, economic and convenient to use.

The invention relates to the technical field of winding, and discloses a leather material winding device with a deviation correcting mechanism. The device comprises bottom plates, round columns are fixedly installed on the upper surfaces of the bottom plates, bearings sleeve the outer surfaces of the round columns, and a rotating column located between the two bottom plates sleeve the outer surfaces of the bearings, and a weighting block is arranged into the bottom of the bottom plate on the bottom in an inserted mode; an anti-skid pad is fixedly installed at the bottom of the bottom plate onthe bottom, a left end, close to the outer surface of the rotating column, of the bottom plates is fixedly provided with a clamping connection device; and the clamping connection device comprises a placing groove which is formed in the left end, close to the outer surface, of the bottom, and a spring is fixedly installed on the groove inner wall of the placing groove. The leather material windingdevice with the deviation correcting mechanism, the weighting block installed at the bottom of the bottom plate enables the device to be more stable when the device is placed, no toppling occurs, moreover, the anti-skid pad is installed, so that the sliding condition can be avoided when the device is placed, and the device is more stable.

The invention relates to a cup holder used for placing cups, in particular to a night cup holder. The bottom of a cup holder body is provided with a vacuum sucking disc, the outer surface of the cup holder body is provided with a light tube, a storage power source and a touch switch which is used to control the light tube, and the light tube is covered with a transparent material layer. When a hand touches the touch switch, the light tube gives out light; and when the hand leaves away from the touch switch for a while, the light tube is extinguished. Therefore, a cup can be taken out conveniently from the night cup holder. The vacuum sucking disc fixes the cup holder body on a table face through sucking force, the cup is arranged inside the night cup holder, so that the troubles that the cup is touched by external force, water is spilled from a cup body, and the cup falls off is avoided.

The invention discloses a box sealing machine. The box sealing machine is used for sealing a packaging box and comprises a rack, a first conveying assembly and a first corner edge box sealing device;the rack comprises a first conveying surface extending in the first direction; the first conveying assembly is arranged on one side of the first conveying surface; the first conveying assembly is movably arranged on the rack in the first direction; the first conveying assembly comprises a first packaging box accommodating space extending in the second direction; the second direction intersects with the first direction; and the first corner edge box sealing device is arranged on the rack. With adoption of the box sealing machine, corner edge box sealing can be performed on the relatively-narrowpackaging box.

The invention discloses an anti-bumping heat preservation box for cold chain transportation, and relates to the technical field of transportation accessories. The anti-bumping heat preservation box comprises a box shell, a box cover is hinged to the box shell, lifting handles are hinged to the outer walls of the two sides of the box shell, two buckle bases are symmetrically arranged on the outer wall of the front face of the box shell, two buckle pieces used in cooperation with the buckle bases are symmetrically arranged on the box cover, and a storage assembly is arranged in the box shell and comprises a storage box. A plurality of storage boxes are arranged on the outer walls of the front surface and the back surface of the storage box; and a storage structure is arranged in the storage box. The storage structure and an air supply structure are used in cooperation, reagents of different sizes can be effectively stored, the reagents of different shapes and sizes can be flexibly and uniformly fixed, a good retention effect can be achieved, the inflation and deflation processes of an air bag are convenient and rapid, therefore, the practicability of the anti-bumping heat preservation box is improved.

The invention discloses a high-safety tower crane for building structure construction and relates to the technical field of tower cranes for construction. The high-safety tower crane for building structure construction comprises a base, a frame body, standard joints, a boom and a balance arm. A sleeve frame platform is fixedly connected with the upper portion of the frame body and located on the outer wall of the corresponding standard joint. The bottom of the balance arm is fixedly connected with a cab. The top of the frame body is fixedly connected with a tower cap. A boom tie rod is fixedlyconnected between the tower cap and the boom. A boom auxiliary tie rod is fixedly connected between the tower cap and the boom and located on the inner side of the boom tie rod. An amplitude changingtrolley is connected with the bottom of the boom in a sliding manner. The high-safety tower crane for building structure construction achieves the purpose that the frame body composed of the standardjoints is more stable, and the standard joints are installed in a penetrated manner and fixed through bolts, so that the stability is guaranteed after the frame body is assembled; and each standard joint and the corresponding lower standard joint are connected through insertion plates and insertion grooves, so that the connected standard joints can bear force in more directions, connection is firmer and tight, and therefore the safety of tower crane operation personnel is guaranteed.

The invention relates to a square article carrier used in an automatic delivery system of an Internet of Things pipeline. The square article carrier comprises an article carrier, wherein the article carrier is formed by an article carrier box and an upper cover. The square article carrier is characterized in that universal rolling wheels which are embedded into corner concaves are arranged at four corners of the article carrier. The square article carrier which is applied in an Internet of Things is designed, and the universal wheels are arranged on the article carrier, so that the article carrier can walk freely in the pipeline; the square structure is normally stable without dumping, so that the square article carrier is suitable for delivering goods which are not suitable for being conveyed in a rolling manner, and even dumping happens in the delivery process, a solving scheme is also designed by the invention.

The invention discloses an automatic 60-degree double-row piling device and a piling method. The automatic 60-degree double-row piling device comprises a rack, a piling mechanism, a water storage bucket, material storage devices, material collecting hoppers and 60-degree locating tubes, wherein the piling mechanism comprises a motor, a belt pulley group, a crank, a first connecting rod, a vertical rod, a four-rod mechanism, a second connecting rod, a third connecting rod, an impact rod I and an impact rod II; each material storage device comprises a material barrel, a discharge switch and a discharge hole; the rack comprises a steering wheel, a piling mechanism supporting frame, a supporting plate, a material collecting hopper connecting frame, front and back wheels and a brake; and the material collecting hopper connecting frame fixedly connects the material collecting hoppers on the two sides of the rack and the 60-degree locating tubes. According to the automatic 60-degree double-row piling device, timber piles are automatically placed, piling is carried out with the included angle of the timber piles and the ground being 60 degrees, the piling device performs piling on the two sides at the same time, the use is convenient, and the piling efficiency, piling quality and safety coefficient are greatly improved.

The invention discloses an anti-winding multihead conveniently-adjusted embroidery machine. The anti-winding multihead conveniently-adjusted embroidery machine comprises an embroidery machine body, amounting block, a first horizontal prism and bearings, wherein the embroidery machine body comprises a worktable, a transverse plate, a needle head frame and an operation screen; the mounting block isfixedly arranged in the central position of the upper end of the needle head frame; the first horizontal prism is arranged above a second horizontal prism; the bearings are arranged inside the firsthorizontal prism and the second horizontal prism in a penetrating manner; a top plate is fixedly arranged above each connecting shaft; a base plate is in penetrating connection with each vertical rod;a positioning frame is fixedly arranged on each base plate; a second sliding chute and a first sliding chute are formed in the side of a vertical plate; fixed plates are respectively and fixedly arranged on two sides of one end of the first horizontal prism and one end of the second horizontal prism. According to the anti-winding multi-head conveniently-adjusted embroidery machine, through the arrangement of the horizontal prisms with sliding structures, space between the first horizontal prism and the second horizontal prism can be adjusted, so that coil tubes can be staggered and tangling and ending of threads on the coil tubes are avoided to a certain degree.

The invention relates to a cabinet body, especially a dense anti-shock cultural relics storage cabinet, which includes a plurality of storage cabinet bodies, the locking shafts are fixedly connected with paddles, and at least one group is fixed on the cabinet bodies to facilitate the fixing of adjacent cabinet bodies. The buckle device and the slot used to cooperate with the buckle device, the buckle device includes a box body and a tongue arranged in the box body, the tongue includes a passive section and an active section, and the passive section passes through one end of the side wall of the box body There is a bending section that is engaged with the card slot, and a rotating shaft fixed in the box body is provided at the junction of the passive section and the active section. A torsion spring is arranged on the rotating shaft. One end of the torsion spring is arranged on the inner wall of the box body, and the other end is connected to the The active section is clamped, and the end of the active section is connected to the paddle through the driving rope. The present invention provides a dense anti-shock cultural relics storage cabinet. When an earthquake occurs, all the storage cabinets can be snapped together by a buckle device, so as to ensure that no dumping will occur when subjected to strong vibrations, and the protection can be maximized. The safety of cultural relics.

The anti-toppling stereoscopic warehouse comprises a supporting body, a transmission assembly is fixedly connected to the outer surface of the supporting body through bolts, a protection assembly is arranged on the outer surface of the supporting body, a shifting assembly is arranged on the upper surface of the transmission assembly, and a moving assembly is arranged on the inner side of the supporting body; through rotation of the protection assembly, the driving balls can protect the two sides of goods, so that when the moving assembly ascends, the goods do not topple over, the safety of goods stacking in a warehouse is improved, the goods are prevented from laterally moving and toggled through the toggling assembly, and the safety of goods stacking is improved. And therefore, the cargoes are more convenient to operate on the conveying belt, and the whole device can effectively prevent the cargoes from toppling over.

The invention relates to a protective smashable-type trough for livestock. The trough includes a base, drawable clapboards, a pulling rod and a plate body; fixing insertion rods are installed at the bottom of the base, and a trough body is arranged on the base; a partition plate is fixed to the middle of the interior of the trough body; crushing cutters are installed on the left and right sides ofthe partition plate, a pressing rod is arranged on the outer side of each crushing cutter, and the outer side of each pressing rod is connected with a hydraulic air cylinder; the drawable clapboardsare arranged above the trough body, and the left and right sides of the trough body are both connected with a pipe; a water tank is mounted above the pipes and internally provided with a filtering net, protrusive blocks are fixed to the left and right sides of the bottom of the filtering net, and sliding grooves are formed below the protrusive blocks. The protective smashable-type trough for the livestock has the advantages that the bottom of each fixing insertion rod is of a conical structure, and by inserting the fixing insertion rods into mud, fixation of the trough body can be achieved, sothat the stability of the trough body is ensured.

The invention relates to the technical field of vehicle unloading, in particular to a container conveying system capable of unmanned unloading. The base, the upper side of the support base is evenly provided with a laying plate along its length direction, and the lower side wall of the container body is provided with two electric sliders, and the two electric sliders are symmetrically distributed on the front and rear sides of the support base. The top extension mechanism is installed on the blocks; the conveying system of the present invention adopts the design integrated with the truck container, which can unload the goods in the container from right to left in sequence, and the present invention can control the goods to automatically tilt and slide to the bottom when the goods are unloaded. Turn over the board, and turn the goods to the outside of the container through the flip board, which is convenient for the unloading of the goods.

The invention relates to the technical field of paperboard packaging machinery, in particular to a paperboard grid inserting machine. The paperboard grid inserting machine comprises a rack as well as a longitudinal paperboard discharging mechanism, a longitudinal paperboard feeding mechanism, a transverse paperboard feeding mechanism and a grid inserting mechanism which are arranged on the rack, wherein the grid inserting mechanism comprises a lifting frame, a limiting plate and a grid inserting plate, and adsorption holes for adsorbing transverse paperboards are formed in the limiting plate; the grid inserting plate is arranged on the side, facing the transverse paperboard feeding mechanism, of the limiting plate in a sliding mode, and a driving assembly for driving the grid inserting plate to ascend and descend is arranged on the lifting frame. The transverse paperboard feeding mechanism comprises a feeding platform mounted on the lifting frame, a first pushing assembly arranged above the feeding platform in a sliding mode and an elastic assembly pushing the first pushing assembly to move towards the limiting plate, the elastic assembly comprises a first tension spring and a first steering wheel, a power mechanism does not need to be arranged, so that the cost is saved. In addition, the situation that the transverse paperboards topple over in the feeding process is avoided, feeding is stable, and the use reliability is improved.

The invention provides a processing process for a PTC type heater. The processing process comprises the following concrete steps: preparing PTC thermal sensitive ceramic chips, preparing a bonding glue, pre-treating aluminum tubes and electrode slices, splicing electrode strips, arranging PTC thermal sensitive ceramic chips, moulding and pressing, and splicing wave-shaped radiating strips. Compared with the prior art, the processing process has the following beneficial effects: with the adoption of a slidable strip clamping bar of a stable chip arranging device, the spaces of the PTC thermal sensitive ceramic chips in the chip arrangement can be guaranteed to be the same and the artificial visual inspection is not required, so the chip arranging quality is improved; moreover, each of the PTC thermal sensitive ceramic chips can be guaranteed to be vertically arranged, and the phenomenon that the arranged PTC thermal sensitive ceramic chips are toppled over does not occur; and thus, the chip arranging quality is further guaranteed, and the chip arranging efficiency can be improved.

The invention relates to the technical field of 3D printing and discloses a chess. The chess comprises chess pieces and a chessboard, wherein the chessboard comprises a first chessboard and a second chessboard; the first chessboard and the second chessboard are fixedly connected by a border part of two opposing powers; a plurality of chess playing lines are respectively arranged on the upper surfaces of the first chessboard and the second chessboard; first arc grooves are arranged at the intersected parts of the plurality of chess playing lines; a first long-stripy magnet is horizontally arranged at the edge of the first chessboard, and a second long-stripy magnet is horizontally arranged at the edge of the second chessboard; the chess pieces comprise front chess pieces, back chess piecesand first hemispheres matched with the first arc grooves; same patterns are respectively printed on the outer-side surfaces of the front chess pieces and the back chess pieces; the front chess piecesand the back chess pieces are vertically and fixedly connected by connecting plates in connecting plates; first magnets are arranged in the connecting board. The chess disclosed by the invention has the beneficial effects that the two parties can be very easy to see the self and the contents of the chess pieces of the opposite party, so that the condition that the contents of the chess pieces areforgotten or the chess pieces are missed is avoided and the experience of chess playing is improved.

The invention discloses an automatic 60-degree double-row piling device and a piling method. The automatic 60-degree double-row piling device comprises a rack, a piling mechanism, a water storage bucket, material storage devices, material collecting hoppers and 60-degree locating tubes, wherein the piling mechanism comprises a motor, a belt pulley group, a crank, a first connecting rod, a vertical rod, a four-rod mechanism, a second connecting rod, a third connecting rod, an impact rod I and an impact rod II; each material storage device comprises a material barrel, a discharge switch and a discharge hole; the rack comprises a steering wheel, a piling mechanism supporting frame, a supporting plate, a material collecting hopper connecting frame, front and back wheels and a brake; and the material collecting hopper connecting frame fixedly connects the material collecting hoppers on the two sides of the rack and the 60-degree locating tubes. According to the automatic 60-degree double-row piling device, timber piles are automatically placed, piling is carried out with the included angle of the timber piles and the ground being 60 degrees, the piling device performs piling on the two sides at the same time, the use is convenient, and the piling efficiency, piling quality and safety coefficient are greatly improved.

The invention relates to the technical field of vehicle unloading, in particular to an unmanned unloading container conveying system which comprises a container body, a supporting base, lapping plates, electric sliding blocks and a jacking and extending mechanism, the supporting base is installed on the lower side wall in the container body, and the lapping plates are evenly arranged on the upper side face of the supporting base in the length direction of the supporting base; two electric sliding blocks are arranged on the lower side wall in the container body, the two electric sliding blocks are symmetrically distributed on the front side and the rear side of the supporting base, and each electric sliding block is provided with a jacking and extending mechanism; according to the conveying system, the design integrated with a truck container is adopted, cargoes in the container can be sequentially unloaded from right to left, the cargoes can be controlled to automatically incline and slide onto the overturning plate when the cargoes are unloaded, the cargoes are overturned to the outer side of the container through the overturning plate, and the unloading action of the cargoes is facilitated.

The invention discloses an efficient and compact double-row automatic piling device. The piling device comprises a rack, a power unit, a piling mechanism, a water storage barrel, a storage device, a transition chute and a 60-degree positioning tube, wherein the piling mechanism comprises a motor I, a belt pulley group, a crank, a connecting rod I, a vertical rod, a four-bar mechanism, a connecting rod II, a connecting rod III, a knocking rod I and a knocking rod II; the storage device comprises a barrel, a gear for the barrel, a stepping motor, a gear for the stepping motor and a discharging hole; the power unit comprises a motor II, a chain wheel and a chain; and the rack comprises a steering wheel, a piling mechanism support frame, a supporting plate, a transition chute connecting rack, wheels and a brake. By the efficient and compact double-row automatic piling device, wood piles can be placed automatically, and are inclined until the angle between each wood pile and the ground is 60 degrees during piling, and simultaneous piling of two sides of the piling device is implemented. The efficient and compact double-row automatic piling device is convenient to use, and piling efficiency, piling quality and safety factors are greatly improved.

The invention discloses an LED desk lamp. The LED desk lamp comprises a lamp holder, at least two lamp rods and lamp heads in one-to-one correspondence to the lamp rods and is characterized in that acontrol device, an infrared induction device, a transmission module and a power unit are arranged in the lamp holder; the lamp rods are evenly distributed around the lamp holder, the lower end of eachlamp rod is fixedly connected with the lamp holder, the upper end of each lamp rod is detachably connected with the corresponding lamp head, a transmission coil vertically winds around the upper endof each lamp rod, each lamp head is of a flying bird shape and comprises two ends, the first end of each lamp head is detachably connected with the upper end of the corresponding lamp rod, a receivingcoil vertically winds around the first end of each lamp head, and the second end of each lamp head is provided with an LED lamp panel. The LED desk lamp has the advantages that the desk lamp does notneed electric wires for power supply, the situation that the lighting effect is affected due to electric wire aging is avoided, the desk lamp can be automatically turned off when a user leaves, and energy conservation and environment protection are achieved.