78results about How to "Reduce the chance of loosening" patented technology

The invention discloses an anti-loosening mechanism for installing a robot. The anti-loosening mechanism comprises a bolt bar and a fastening nut. A section is axially formed on the bolt bar, a left-hand threaded rod is integrally formed at the top end of the bolt bar, the bolt bar is sleeved with a gasket, a through hole matched with the bolt bar is formed in the gasket, the fastening nut is connected to the side, corresponding to the gasket, of the bolt bar in a threaded mode, a first threaded hole is formed in the middle of the fastening nut, an arc groove is formed in the part, corresponding to the periphery of the first threaded hole, on the fastening nut, a limiting nut is connected to the side, corresponding to the fastening nut, of the outer side wall of the left-hand threaded rodin a threaded mode, a second threaded hole is formed in the middle of the limiting nut, fixing holes are formed in the part, corresponding to the periphery of the second threaded hole, of the limitingnut, and fixing mechanisms are connected to the position, corresponding to the arc groove, in the fixing holes in an inserted mode. Compared with a traditional bolt, the anti-loosening mechanism is not likely to loosen, the loosening dropping phenomenon can be avoided, and safety accidents can be avoided; and meanwhile, disassembling is convenient, the anti-loosening mechanism can be used again,and waste can be avoided.

The invention relates to a firmly plugged portable router based on the Internet of things, which comprises a main body and at least two network cable interfaces, and is characterized by further comprising a connecting mechanism, a retracting and releasing mechanism and a central control mechanism, a plugging assembly comprises a sliding block, a sleeve, a connecting rod, a connecting wire, a driving block, a first spring, two reinforcement rods and two electrodes, a limiting assembly comprises a first fixing rod, a second fixing rod, a guide block, a transmission rod, a second spring, a sliding slot, a rotating rod, a first limiting block, a first limiting rod, a second limiting rod, a clamping block and a torsion spring, and the retracting and releasing mechanism comprises a driving assembly, a guide rod, a connecting block and a second limiting block. In the firmly plugged portable router based on the Internet of things, the connecting mechanism improves the firmness of the connection between the router and a socket so as to reduce the dropping probability of the router, and the retracting and releasing mechanism not only realizes the retraction and release of the electrodes butalso reduces the loosening probability of the electrodes so as to improve the stability of the electrodes.

The invention relates to a piston assembly of an air compressor, belonging to the technical field of air compressors. The piston assembly comprises a piston cover plate, a piston body and a sealing ring, wherein the piston cover plate is connected on the piston body by using a fastening piece and the sealing ring is assembled between the piston cover plate and the piston body. Compared with the prior art, the invention is characterized in that the sealing ring has an elliptic or quasi-elliptic annular outer edge surface which can be in movable sealing fit with the wall surface of the inner bore of a cylinder, the sealing ring is not apt to get loose because of rotation around the axis of the piston assembly under the impacts of factors such as vibration, inertia, deformation and the like, and the piston cover plate other than the sealing ring is also not apt to get loose; and moreover, the fastening position of the fastening piece is offset relative to the axis of the piston assembly, the formed offset can form the force arm of an anti-loose moment which can resist the loosening of the piston cover plate under rotation, and thereby the loosening of the piston cover plate under rotation can be effectively prevented.

The invention discloses a metal bar cutting machine which solves the problem that a metal bar cutting machine at the present stage feeds materials manually and consumes labor. According to the key points of the technical scheme, the metal bar cutting machine comprises a rack, a cutting device, a conveying device and a feeding device. The conveying device comprises a conveying platform, a first conveying mechanism, a second conveying mechanism and a first horizontal moving assembly. The feeding device comprises a feeding platform, a pushing mechanism, a supply table and a second horizontal moving assembly. The feeding platform is provided with a feeding slide groove for arranging metal bars in the front and back direction. The pushing mechanism can push the metal bars in the feeding slide groove into the conveying device. The supply table can transfer the metal bars into the feeding slide groove of the feeding platform one by one. The second horizontal moving assembly drives the feedingplatform to slide left and right. According to the metal bar cutting machine, operating workers do not need to add the metal bars one by one, and the automation degree of the metal bar cutting machine is improved.

The invention discloses a wire cable fixing structure of an electric power dispatching system, comprising a base plate; a first support rod is arranged on the top surface of the base plate; an arched support frame is arranged on the first support rod; two fixing clips are arranged on the top surface of the base plate; the two fixing clips are respectively located at two sides of the first support rod; the arched support frame comprises an arched sleeve arranged on the first support rod; a rubber inner pipe is arranged in the arched sleeve; throats are arranged at two ends of the rubber inner pipe; first spring bodies are arranged in the throats; a positioning mechanism is arranged between the rubber inner pipe and the arched sleeve; the fixing clips comprise clamping plates arranged on the base plate; fixing blocks are connected to the clamping plates through second spring bodies; rubber diaphragms are arranged at two ends of the fixing blocks. The invention can solve the deficiency in the prior art and improves the wire cable fixing stability.

The invention relates to water conservancy power generation equipment with a protection function for the seabed. The water conservancy power generation equipment comprises a base, supports, blades anda power generator, and further comprises a protection mechanism and a stabilization mechanism; and the protection mechanism comprises a protection cover and a cutting assembly, and the stabilizationmechanism comprises a stabilization block, a lifting mechanism and a rotation mechanism. According to the water conservancy power generation equipment with the protection function for the seabed, blades are protected through the protection mechanism, so that sundries such as sea grass can be prevented from being wound on the blades, normal work of the water conservancy power generation equipment can be ensured, the damage probability of equipment can be reduced, and the service life of equipment can be prolonged; secondly, the base is further fixed in gravel through the stabilizing mechanism,the probability of looseness between the base and the gravel is reduced, and therefore the stability of the equipment is improved.

The invention relates to a vibration reduction type industrial personal computer with a dustproof function for software testing. The industrial personal computer comprises a case, the industrial personal computer further comprises a buffer mechanism and a dustproof mechanism, the buffer mechanism comprises a mounting plate and at least two buffer components; each buffer component comprises a guiderail, a second spring, a lifting sleeve, a first permanent magnet, a second permanent magnet and an electric push rod; the dustproof mechanism comprises a dustproof cover, a second air bag, an air delivery pipe, two connecting assemblies, at least two threading pipes and at least two first air bags. Each connecting assembly comprises a sliding rod, a connecting sleeve and a first spring. In the vibration reduction type industrial personal computer with a dustproof function for software testing, under the buffering effect of the buffer mechanism, the probability of looseness of all parts in the industrial personal computer is reduced, the probability of failure of the industrial personal computer is reduced, the accumulated dust on interfaces of the industrial personal computer is reducedthrough the dustproof mechanism, the probability of poor contact of the industrial personal computer is reduced, and the reliability of the industrial personal computer is improved.

The invention provides a screw and a normal juice machine. The screw comprises a shell made of metal and a rotating shaft, wherein helical teeth are arranged on the peripheral wall of the shell; the rotating shaft is connected with the shell, and is capable of driving the shell to rotate; the shell comprises a plurality of sub shells, and the plurality of sub shells are spliced to form the shell. The screw provided by the invention comprises the rotating shaft and the shell, wherein the shell is formed by connecting the plurality of sub shells in a matched manner; the size of each sub shell is relatively small, therefore, the processing difficulty is greatly reduced, further, the redundant material on each sub shell can be conveniently removed through the turning process or other processes, and thus the wall thickness of each sub shell is reduced; the processed sub shells are connected together through combination to form the complete shell, thus the integral size of the shell is effectively reduced, and finally, the purpose of reducing the weight of the screw is achieved; meanwhile, the reduction of the size and the weight of the shell is also beneficial for the other secondary processing, and thus the processing difficulty of the screw is further reduced.

The invention provides a pedicle screw fixation device and system for thoracolumbar spine posterior orthopedics, and relates to the technical field of medical instruments. The pedicle screw fixation device for the thoracolumbar spine posterior orthopedics comprises a pedicle screw, a limiting piece and a locking piece; the pedicle screw comprises a screw head part and a screw body part which are connected with each other; the screw head part is provided with a sliding groove for placing a connecting rod; the limiting piece is movably connected with the sliding groove, can move in the axial direction of the sliding groove and is internally provided with a mounting channel which is axially through; the locking piece is movably connected with the mounting channel and can move in the axial direction of the mounting channel. According to the pedicle screw fixation device for the thoracolumbar spine posterior orthopedics, an existing sliding groove screw growth rod system is improved, through a mode that the limiting piece cooperates with the locking piece, the situation that by means of the existing sliding groove screw system, an incision operation is needed again in the final operation, an original implant is replaced, and the pain and financial burden of patients are greatly reduced.

The present invention relates to the technical field of bras, and in particular relates to a washable quick-drying portable air-permeable bra and a preparation method thereof, the washable quick-drying portable air-permeable bra includes a bra cup part and a back surrounding part which is connected with two ends of the bra cup part, the bra cup part is an air-permeable cotton bra cup part, the back surrounding part is an air-permeable cotton back surrounding part, the bra cup part and the back surrounding part respectively comprise a first adhesive net layer, a first cotton net layer, a cotton layer, a second cotton net layer and a second adhesive net layer; the first adhesive net layer, the first cotton net layer, the cotton layer, the second cotton net layer and the second adhesive net layer are connected from outside to inside in turn, and the first adhesive net layer and the second adhesive net layer are respectively provided with a plurality of air-permeable holes. The washable quick-drying portable air-permeable bra adopts an air-breathable cotton fabric, and the washable quick-drying portable air-permeable bra is excellently light, breathable, skin-friendly, washable, quick-drying and soft, is comfortable to wear and easy to carry, does not produce mugginess feeling, is low tendency to produce mold, does not affect breast blood circulation, is conducive to breast health, can be repeatedly washed and dried, and is suitable for travel women and environmentally-friendly and healthy.

The invention discloses an anterior cervical approach self-fixation artificial centrum and belongs to the technical field of medical centrum manufacturing. The anterior cervical approach self-fixationartificial centrum is composed of an integrated centrum part and is mainly characterized by comprising an upper-end cambered surface, a lower-end oblique plane, an end face sawtooth structure, an endface micro-hole structure, a side wall rhombus hole, a back wall micro-hole structure, a front wall cambered surface structure, a back wall cambered surface structure and a screw hole structure for front wall self-fixing. A traditional anterior cervical approach titanium plate is removed on the premise that the stability of postoperative spine segments is ensured, the complexity degree of sub-total ectomy fusion of an anterior cervical approach cervical vertebra body is effectively reduced, the surgical time is shortened, the bleeding during surgery is decreased, a biomechanical conduction mode of an anterior cervical approach implantation instrument is optimized, and lots of complications caused by anterior cervical approach steel sheets are avoided. By adopting the above design, the anterior cervical approach self-fixation artificial centrum can effectively decrease lots of complications of a traditional titanium cage and improves prognosis of a patient suffering from the sub-totalectomy fusion of the anterior cervical approach cervical vertebra body.

The invention discloses a fixing device for neutralizing actions between two vertebral bodies, in particular a fixing device for neutralizing or countervailing actions between two adjacent vertebral bodies. The fixing device is a plate-shaped body, one side of the plate-shaped body is provided with a nail part, and the fixing device is embedded into two corresponding vertebral bodies and intervertebral discs by the nail part. When necessary, the fixing device also can be matched with a support assembly, such as a metal cage, and embedded into the intervertebral discs of the two corresponding vertebral bodies. Therefore, the fixing device can effectively control actions between the two vertebral bodies, such as forward bending, backward bending, left and right incline, left and right turn, and the like, and enable an autogenous bone embedded between the two adjacent vertebral bodies not to generate the problem of non-union or psuedarthrosis because of actions between the vertebral bodies before completely inosculated with the vertebral bodies.

The invention relates to an integrated structural minimally-invasive fascia closer. The integrated structural minimally-invasive fascia closer comprises a thread clamp and a puncture needle, wherein the thread clamp comprises a shell body and a pull rod arranged in the shell body, the end portion of the pull rod is fixedly connected with a thread slot fixing head, a thread fixing slot is arranged at the end portion of the thread slot fixing head, the outer wall of the shell body and the side wall of the wire slot fixing head are connected by virtue of two groups of connection outer shells in a mirror symmetry about the axis of the shell, and each connection outer shell group comprises a supporting outer shell A with the end portion being connected with the outer wall of the shell body and a supporting outer shell B with the end portion being connected with the thread slot fixing head; a constraint thread slot is arranged on the side wall, corresponding to the supporting outer shell A, of the shell body; a thread passing opening is coaxially formed in the supporting outer shell A, the puncture needle comprises a needle tube main body, a lantern ring is also arranged in the needle tube main body, the lantern ring is fixedly provided with a traction rod which is connected with the inner wall of the needle tube main body in a sliding manner, an opening is formed in the lantern ring, and two axial ends of the opening of the lantern ring are elastically closed under the extrusion of the inner wall of the needle tube main body.

The invention discloses a fixing device for neutralizing actions between two vertebral bodies, in particular a fixing device for neutralizing or countervailing actions between two adjacent vertebral bodies. The fixing device is a plate-shaped body, one side of the plate-shaped body is provided with a nail part, and the fixing device is embedded into two corresponding vertebral bodies and intervertebral discs by the nail part. When necessary, the fixing device also can be matched with a support assembly, such as a metal cage, and embedded into the intervertebral discs of the two corresponding vertebral bodies. Therefore, the fixing device can effectively control actions between the two vertebral bodies, such as forward bending, backward bending, left and right incline, left and right turn,and the like, and enable an autogenous bone embedded between the two adjacent vertebral bodies not to generate the problem of non-union or psuedarthrosis because of actions between the vertebral bodies before completely inosculated with the vertebral bodies.

The invention relates to a permanent magnet outer rotor aerator which comprises a stirring piece and a suspension piece. The stirring piece is connected with and arranged in a water area below the suspension piece; an impeller is assembled at the bottom of the stirring piece; a motor is arranged in the stirring piece in a sealing manner; the motor drives the impeller to stir water; the suspensionpiece realizes a stable operation posture in water by utilizing a floating ball which is unfolded in a central symmetry manner; and the floating ball adopts a double-layer structure, and a buoyancy block is arranged at the interlayer, so that semi-inflatable launching can be realized, the shore volume of the permanent magnet outer rotor aerator is effectively controlled, and the carrying difficulty is reduced.

The invention discloses a book end unit comprising a book end body with an L-shaped structure, the book end body comprises a bottom plate part and a vertical plate part which is integrally formed withthe bottom plate part, the book end unit further comprises a movable baffle arranged between the bottom plate part and the vertical plate part and a support positioning mechanism used for being matched with the track, the lower end of the movable baffle is connected with the bottom plate in a relatively rotatable manner, and the upper part of the movable baffle is connected with the vertical plate part through a first spring piece; in the process that the movable baffle is close to the vertical plate part of the book end body, the connecting rod drives the sliding block to move downwards, sothat the two elastic supporting arms of an elastic supporting part are forced to extend outwards, the supporting leg corresponding to each elastic supporting arm is driven to move towards the transverse outer side, the frictional resistance between the tail end of the supporting leg and the track is increased, and finally the purpose that the book end unit is positioned on the track by depending on the book is achieved, and the probability that books are poured or loosened is greatly reduced.

The invention provides a ceramic heating assembly and an electronic atomizer. The ceramic heating assembly comprises a ceramic base body and a conductive heating piece. The conductive heating piece comprises a conductive body and a conductive bent part, the conductive bent part is connected with the conductive body, at least part of the conductive bent part is embedded in the ceramic substrate, the conductive body is located outside the ceramic substrate, and the conductive body is connected with the ceramic substrate. The conductive body of the conductive heating piece is arranged on the ceramic substrate, and the conductive bent part of the conductive heating piece is embedded into the ceramic substrate, so that the two surfaces of the conductive bent part are in contact with the ceramicsubstrate, and the conductive bent part is clamped with the ceramic substrate; therefore, the connection area between the conductive bent part and the ceramic substrate is increased, the connection stability between the conductive bent part and the ceramic substrate is improved, the connection stability between the conductive heating element and the ceramic substrate is improved, and the probability of warping and loosening is reduced.

The invention relates to a vibration reduction type main machine with a dehumidification function. The host comprises a main body, a radiating port and a fan. The host further comprises a buffer mechanism and a dehumidification mechanism. The buffering mechanism comprises an air conveying pipe, at least two bypass pipes and four vibration reduction assemblies. The vibration reduction assembly comprises an air cylinder, an air rod and a first spring. The dehumidifying mechanism comprises a supporting sleeve, a rotating sleeve, an annular groove, a first filter screen, a second filter screen, asealing ring, a connecting rod, a connecting shaft, three fan blades and at least two supporting assemblies. The supporting assembly comprises a mounting sleeve, a moving rod, a supporting strip and asecond spring. In the vibration reduction type host with a dehumidification function, through the damping effect of the buffer mechanism on the host, the vibration of the main body is reduced, the probability of loosening of devices in the host is reduced, the failure rate of the host is reduced, the humidity of air fed into the host can be reduced through the dehumidification mechanism, the probability of damp short circuit of the devices in the host is reduced, and the failure rate of the host is further reduced.

The embodiment of the invention discloses a shell of a seismograph acquisition station. The shell of the seismograph acquisition station comprises an outer shell body which is of a hollow structure with two ends formed with openings, a drawer-type track being arranged in the hollow structure for placing a seismograph acquisition station circuit board; two end covers which are respectively used for mounting and sealing the opening at one end of the hollow structure; the other end of each of the end covers is respectively connected with a cable; all cables on each side are 110m, and a wave detector is arranged between each two cables of the cables on each side by a spacing of 55m. According to the embodiment, with the adoption of a chain-type structure of the acquisition station, the outer shell body of the acquisition station is integrated with the cables through the end covers without plug connection, therefore, the quantity of the plugs of the acquisition station is reduced in the process of applying in the field; the acquisition station shell not only reduces the cost of the equipment but lowers the rate of the equipment fault caused by a poor contact. In addition, the acquisition station shell with the drawer-type design simplifies the processes of mounting and detaching the acquisition station.

The invention discloses a strength detection device for steel. The detection device comprises a supporting frame, the top of the supporting frame is fixedly connected with a beam. A baffle and a reinforcing plate are fixedly arranged on the inner side of the supporting frame. An operation box is welded to one side of the supporting frame. A motor is fixedly mounted in the supporting frame througha bolt; a driving gear is fixedly arranged at one end of the motor; a bearing and a sliding rail are embedded into the supporting frame. A totating shaft is movably connected to the inner side of thebearing; the outer wall of the rotating shaft is movably connected with the sliding block through threads. A driven gear is welded on the outer wall of the rotating shaft; one side of the sliding block is fixedly connected with a connecting rod; one side of the connecting rod is fixedly connected with a clamping plate; an overhaul plate is embedded into the front face of the beam, a hydraulic machine is fixedly installed in the beam through bolts, a hydraulic rod is movably connected to the bottom of the hydraulic machine, a detection head is fixedly connected to the bottom of the hydraulic rod, and the problem that the detection result accuracy of the detection equipment is low is solved through the detection head, the operation box and the hydraulic machine.

The invention discloses a wafer basket clamping anti-falling manipulator with an alarm function, which comprises a rotating assembly fixed on a lifting shaft, a rotating rod, a bearing positioning seat, a buffer assembly, a clamping assembly for taking and placing a wafer basket, an alarm flash lamp and a touch sensing sheet, the rotating assembly comprises a pushing air cylinder, an inclined plane sliding block, rotating seats arranged in a bilateral symmetry mode, a pin shaft and a rolling ball, the two ends of the rotating rod are matched with the bearing positioning seats for positioning, one end of the rotating rod is fixedly connected with the rotating assembly, and the other end of the rotating rod is connected with the clamping jaw through the buffering assembly, and the clamping jaw comprises a locking block, a fastening nut, a clamping rod and a clamping arm. According to the mechanical arm, the clamping arm is secondarily fastened through the fastening nut, meanwhile, the clamping arm is fixedly locked on the rotating rod in cooperation with the buffering assembly, secondary locking is conducted between the rotating rod and the locking block, and the touch sensing piece can toggle a switch in the alarm flash lamp to give out flash alarm. And the effects of prevention and alarm are achieved.

The invention relates to the technical field of medical instruments, and provides a dental implant. The dental implant comprises a dental implant body, and the dental implant body is provided with a root dental implant, a bottom dental implant and an end dental implant; the root dental implant is of a conical structure, the outer surface of the root dental implant is provided with a bone trabeculastructure, the bottom dental implant and the end dental implant are of cylindrical structures, the outer surface of the bottom dental implant is provided with an external thread, the outer surface ofthe end dental implant is provided with a plurality of anti-rotation grooves, and the anti-rotation grooves are arranged at intervals of 90 degrees. The dental implant has the beneficial effects that: the bone trabecula structure can improve the biocompatibility of the dental implant; the external thread structure can improve the tightness between the implant and the bone tissue, increase the contact area between the implant and sclerotin, and realize good cooperation; and the anti-rotation grooves are matched with a base table to prevent the base table from rotating, and correct installationof the base table is guaranteed.

The invention relates to a multi-direction adjustable extracorporeal restoration iliolumbar cushion. According to the multi-direction adjustable extracorporeal restoration iliolumbar cushion, the transverse width, the vertical length and the longitudinal height of the cushion can be adjusted according to requirements. The multi-direction adjustable extracorporeal restoration iliolumbar cushion comprises a quadrilateral base, a cushion body and telescopic devices which are telescopic in the longitudinal direction, wherein the telescopic devices are arranged at the four corners of the quadrilateral base respectively, and the cushion body is fixedly arranged on the telescopic devices. According to the multi-direction adjustable extracorporeal restoration iliolumbar cushion, operation is convenient, and both time and labor are saved; meanwhile, the length and the width can be adjusted according to the body form of a patient; in addition, after an upper joint and a lower joint which are malpositioned relative to each other can be located on the same horizontal plane through adjustment of the longitudinal height, screws are screwed, the frequency of the situation that restoration is achieved by pulling the screws with large force during an operation is reduced to the greatest extent, and the probability of looseness of the screws is lowered; furthermore, the size of the cushion can be reduced when the cushion is not used, and thus the occupied area is reduced.

The invention provides hoisting equipment for a green building assembly type prefabricated wallboard, and relates to the technical field of hoisting devices, the hoisting equipment comprises a seat body, a connecting part, an auxiliary part and a hanging part; a connecting seat A is mounted on the seat body; two rotating seats A are welded to the bottom of the connecting seat A, and each rotating seat A is rotationally connected with a rolling wheel. Each sliding block is slidably connected with two sliding rods B, the tail ends of the two sliding rods B on the left side and the tail ends of the two sliding rods B on the right side are each in threaded connection with a connecting block, and the bottom end faces of the two connecting blocks are each provided with a hook in a welded mode. Each sliding rod B is sleeved with an elastic piece B, and the elastic pieces B form a buffering structure of the hook, so that stress fracture of the hook during hanging can be prevented, and the problems that firstly, automatic locking of the hook cannot be achieved, and safety is low are solved; and secondly, automatic adjustment of the steel wire rope cannot be achieved during hoisting, and automatic locking of the steel wire rope after adjustment is achieved.

The invention provides an anti-sinking door which comprises a door frame and a door leaf. The door frame comprises a connection column connected with the door leaf through hinges. The connection column is sequentially provided with a first panel, a rib and a second panel in the thickness direction. The first panel and the second panel are connected together through the rib. A fixing element is further arranged in the connection column. The two ends of the fixing element are connected with the first panel and the second panel respectively. One blade of each hinge is fixed to the side, close to a third panel, of the fixing element. Compared with the prior art and a common door, the fixing element is arranged in the door frame, besides, the fixing element is fixed to a wall through an expansion bolt, the gravity of the door leaf is transmitted to the fixing element through the hinges, the fixing element transmits the gravity to the wall through the expansion bolt, the probability that the hinges disengage from the door frame is reduced, and the door leaf is controlled to not sink. When the door leaf is opened and closed, noise is lowered, and the door is environmentally friendly and reliable.

The invention discloses a book end system. The book end system comprises two book end units which are arranged in pairs and rails arranged on the two sides of the two book end units; each book end unit comprises a bottom plate part, a vertical plate part which is integrally shaped with the bottom plate part, a movable baffle plate which is arranged between the bottom plate part and the vertical plate part, and a supporting positioning mechanism which is used for cooperating with the rails, the lower end of the movable baffle plate can be rotatably connected to the bottom plate, and the upper portion of the movable baffle plate is connected with the vertical plate part through a first spring member; in the process where the movable baffle plate gets close towards the vertical plate part ofa book end body, a sliding block is driven to move downwards by a connecting rod to force two elastic supporting arms of an elastic supporting member to expand outwards, so that supporting legs whichare arranged on all elastic supporting arms are driven to move horizontally outwards, the friction resistance between the rear ends of the supporting legs and the rails is increased, the purpose of positioning the book end units on the rails relying on books is eventually achieved, and the possibility that the books fall down or loosen is greatly reduced.

The invention belongs to the technical field of accessories for plant protection drones, in particular to a power-off prevention plug for plant protection drones; it includes a socket and two matching plugs, and the socket is provided with two relatively vertical plugs. The middle part of the jack is wider than the two ends, the inner wall of the jack is provided with a conductive plate, the top of the plug is provided with an insulating seat, and the two insulating seats are connected by a herringbone frame; the present invention sets two relatively vertical And the wider jack in the middle, the two relatively vertical jacks on the socket can be inserted into two plugs connected by a herringbone frame, and two plugs with opposite polarities can only be inserted into two plugs from a fixed orientation. In the jack with a larger middle width, the plug is prevented from being inserted backwards. At the same time, the middle width of each jack is larger than the width at both ends, which can make the contact area between the plug and the conductive plate larger, and provide power for a higher-power motor. , improving the power performance of the UAV.

The invention discloses a floor drain type water outlet box of a sectional material, and relates to the technical field of sectional material drainage design. The profile frame comprises a profile frame body, a drainage groove and a water outlet groove are formed in one side of the interior of the profile frame body, a limiting groove is formed in the bottom of the inner wall of the drainage groove, and a drainage mechanism is clamped in the limiting groove. The drainage device has the beneficial effects that a mutual limiting and fixing effect can be formed between the drainage mechanism and the noise reduction water outlet mechanism, the firmness between the drainage mechanism and the noise reduction water outlet mechanism is improved, the probability that the drainage mechanism and the noise reduction water outlet mechanism are loosened due to the influence of external wind power is reduced, and wind blown to the flow guide mechanism at all angles can be shunted and guided; according to the rainwater drainage device, the influence of wind power on rainwater drainage is reduced, part of flow wind power can be utilized to accelerate rainwater drainage, so that the problem of reverse osmosis caused by rainwater accumulation is solved, the wind flowing path can be dispersed and disordered, the wind power is mutually interfered and counteracted, and the effect of low wind noise is achieved.

The invention relates to a vibration-reducing axial flow fan with protection function, which includes a main body, a motor, a drive shaft and fan blades, and also includes a protection mechanism and an anti-shake mechanism. The protection mechanism includes a mounting bearing, a connecting shaft, a cleaning brush, detection assembly, two fixed sleeves, two fixed rods, two second springs, two protective nets and two friction blocks; The vibration damping assembly includes a support sleeve, a support rod and a third spring, and the detection assembly includes a sliding sleeve, a first spring, a thrust plate, two fixed pulleys, and two connecting wires. In the axial flow fan, through the protective function of the protective mechanism, the probability of large debris being sucked into the fan is reduced, and the failure rate of the fan is reduced. The vibration of the fan is reduced through the anti-shake mechanism, and the loosening of the fan installation is reduced. The chance of improving the stability of fan installation.