57results about How to "Release the limit effect" patented technology

The invention provides a thermal separation mechanism and a surge protection device. The thermal separation mechanism comprises a heating chip, a conducting plate and an elastic push rod component; the heating chip is provided with a leading-out end face; the conducting plate is provided with a connecting end face; the connecting end face and the leading-out end face are welded through a welding flux; the elastic push rod component comprises a first elastic part and a push rod which is provided with an insulating end; one end of the elastic part is fixedly arranged on the push rod; when the thermal separation mechanism is in a working state, the insulating end is arranged between the connecting end face and the leading-out end face in a pressing manner; when the heating chip heats until the welding flux is melted down, the connecting end face is separated from the leading-out end face; and the insulating end moves between the connecting end face and the leading-out end face under the driving of the first elastic part. The insulating end moves between the connecting end face and the leading-out end face to completely isolate the connecting end face and the leading-out end face, so that the problem of halfway release is solved.

The invention discloses a comprehensive wood polishing device. The comprehensive wood polishing device comprises a movable box, wherein a matching type fixing cylinder is fixedly arranged at the lower end of the movable box, an insertion column is inserted into the middle of the lower end of the matching type fixing cylinder, a polishing piece is fixedly welded to the lower end of the insertion column, a cylindrical deep groove is formed in the middle of the lower end of the matching type fixing cylinder in a penetrating mode, the insertion column is inserted into the cylindrical deep groove in the matching type fixing cylinder, fixing matching pieces are fixedly arranged on the two sides of the matching type fixing cylinder, and pushing pieces are movably arranged on one sides of the lower ends of the fixing matching pieces in a penetrating mode. According to the comprehensive wood polishing device, movable inclined grooves are formed in the middles of movable connecting rods in a penetrating mode, movable shafts can move relatively in the movable inclined grooves, and thus the movable connecting rods are not likely to get stuck during rotary movement.

The invention relates to the field of metal surface defect detection devices, in particular to a metal limiting mechanism of an ultrasonic metal surface defect detection device. The mechanism comprises a base, a sliding structure, an abutting structure, a rotating structure, a fixing structure, an ejecting structure and an adjusting structure. A sliding structure is further installed at the top end of the base. The steel pipe can be conveniently placed. Steel pipes with different lengths can be clamped and fixed in cooperation with the abutting structure. Therefore, defect detection can be conveniently carried out on the steel pipe. The rotating structure is mounted in the sliding structure, the clamped and fixed steel pipe can be rotated in all directions, so detection personnel can carryout comprehensive detection conveniently, and detection effect can be improved. Through the arrangement of the fixing structure, the steel pipes can be clamped and fixed, the steel pipes with different internal diameters can be clamped and fixed, and therefore the applicability of the device can be greatly improved, and detection is facilitated.

The invention discloses an intelligent control panel with a protection function. The intelligent control panel comprises: a protection shell, wherein a mounting frame arranged on the front surface of the protection shell; dustproof assemblies arranged at two ends of the protection shell; limiting assemblies arranged in the bottom and the top of the front surface of the mounting frame; and protection assemblies arranged at the top and the bottom in the protection shell. Sliding rods are fixedly connected to the ends, close to each other, of two fixing blocks. The intelligent control panel has the beneficial effects that clamping and fixing assemblies can achieve fixing operation between the protection shell and the mounting frame by controlling the two ends of the protection shell, the two protection assemblies are designed and correspond to the protection shell and the mounting frame at the same time, so the intelligent control panel can be integrally mounted and fixed; and the limiting assemblies can protect the surface of the display assembly by controlling the up-down sliding distance of a protective cover when the intelligent control panel is not used, and dust is prevented from affecting normal use of the display assembly.

The invention discloses an accounting data storage device. The accounting data storage device comprises a storage cabinet. Through the cooperative use of an adjusting mechanism, a mounting plate, storage boxes, a first mounting base, an abutting pipe and a first rotary shaft, an operator pulls a storage drawer, elastic potential energy of a first spring can drive a first sliding block to slide, thus second rotary shafts are utilized for driving a first connecting rod to rotate, and then the mounting plate rotates upwards under the function of the first rotary shaft, so that the storage boxes on the mounting plate are sequentially exposed ahead of the operator; meanwhile, the first sliding block conducts limiting through a second spring and a limiting block, through the synergistic effect of a telescopic mechanism, a baffle, the abutting pipe, mounting blocks and a U-shaped block, when the drawer is closed, the first sliding block abuts against the abutting pipe and a fixation block, sothat the storage boxes on the mounting plate draw back, then an abutting block stored at the end of the drawer abuts against a second sliding block, a third spring is squeezed to enable a second connecting rod to pull the mounting block, and the limiting effect of the mounting plate on the baffle is removed.

The invention belongs to the technical field of machines, and particularly discloses a machine lifting type engineering machine transfer device. In order to solve the problem that no safety protectionmechanism is arranged in an existing machine lifting type engineering machine transfer device, when a driving mechanism fails accidentally in the process of lifting mechanical equipment, the mechanical equipment can drop suddenly, and certain potential safety hazards exist, the following scheme is proposed. The machine lifting type engineering machine transfer device comprises a base with the lower end connected with moving wheels, an output shaft of a second servo motor is fixedly connected with a first stroke screw, the first stroke screw is in threaded connection with a lifting frame, an unloading boosting mechanism is connected between the top ends of a pair side protection plates, the side ends of the side protection plates are connected with ladder-type limiting mechanisms, and theupper side of the base is provided with a lifting piece. According to the machine lifting type engineering machine transfer device, as the side ends of the side protection plates are connected with the ladder-type limiting mechanisms, when a lifting seat falls due to an accidental fault of related electrical equipment, the ladder-type limiting mechanisms can limit the lifting seat, and the safetyof the mechanical equipment in the transfer process is improved.

The invention relates to a rotary supporting system and process for electric arc spraying. The rotary supporting system comprises a supporting frame, supporting side plates, a buffer device, a supporting device and a pushing device, wherein the front and rear ends of the top of the supporting frame are provided with the supporting side plates respectively, the buffer device is arranged at the right end of the supporting frame, the supporting device is located above the supporting frame, the supporting device is connected with the supporting side plates, and the pushing device is arranged on the supporting frame; and the pushing device comprises a pushing hydraulic cylinder, a pushing T-shaped plate, a pushing rotating plate, a pushing spring, a pushing blocking frame, a blocking frame spring, a blocking mechanism, an unlocking block and a telescopic mechanism. The rotary supporting system and process for electric arc spraying can solve the problems that when an existing belt roller performs electric arc spraying, one-time spraying cannot be carried out on ganged belt rollers, when the belt roller performs spraying, firm locking cannot be carried out, the rotation of the belt rolleris controlled difficultly, the spraying effect of the belt roller is poor, and when the belt roller performs spraying, spray residues can splash arbitrarily.

The invention discloses a safety door lock device of a shot blasting machine, which comprises a shot blasting machine body, wherein a cavity is arranged at the bottom of the shot blasting machine body, and a motor is fixedly connected with the inner side wall of the cavity. The output end of the motor is fixedly connected with a fixed shaft. One end of the fixed shaft far away from the motor penetrates through the inner side wall of the cavity and is fixedly connected with a placing table, and the fixed shaft is fixedly sleeved with a first helical gear. In the invention, the matching action of the first helical gear, a connecting mechanism, the motor, the fixed shaft and a fan blade is adopted, so that kinetic energy is provided for a door lock linkage system of the device, and a door body is in a limiting locking state when the motion state of the shot blasting machine body is ensured. The synergistic effect of a piston, a connecting rod, a rotating shaft, a reset mechanism, a sliding block, a limiting rod and the door body is achieved, so as to ensure that the piston is subjected to wind force, the limiting rod is pushed to be in a locked state, and when the wind force disappears, the limiting effect of the limiting rod on the door body is released under the action of the elastic potential energy of a spring.

The invention relates to the technical field of industrial and commercial management, in particular to a teaching system for industrial and commercial management major. The system comprises a projection module, a display module, a writing module and a mounting frame, wherein the projection module, the display module and the writing module are all mounted on the mounting frame; a display board canbe folded at a rear side of a projection screen to expose the blackboard, thereby writing on the blackboard; when needing to display a form or curve in the change, the display board can be pulled outleftwards from the rear side of the projection silver screen, so that a button can drive an anti-skidding rubber block to break away from an inner sidewall of a sliding chute through a L-shaped extrusion rod by pressing the button, the limiting effect of the anti-skidding rubber block is relieved, and then the system can directly slide up and down; by sliding multiple sliding blocks, the data curve of the product is revealed, color ribbons on the sliding blocks can be used as an analog column chart, and the height of the color ribbon column chart can be any adjusted, the user is convenient, and the teaching efficiency is high.

The invention discloses a fire resisting window with a stepless speed-regulating window closer. The fire resisting window comprises a window frame and a window sash matched with the window frame, andthe window sash is installed on the window frame through spring hinges. The window closer is further installed between the window sash and the window frame. In a non-fire state, a temperature controldevice stops a sliding block from sliding in sliding rails, and a second connection rod slides in an oblong hole so that the fire resisting window can be closed; and when a fire disaster occurs, the temperature control device loses the limiting function for the sliding block, the resilience force of a second spring in the spring hinges is transferred to the second connection rod through the windowsash, the second connection rod and a first connection rod drive the sliding block to slide in the sliding rails, and thus the window closing action is completed. According to the fire resisting window, the window closer is matched with the spring hinges, and the function of automatically closing the window in case of a fire can be achieved.

The invention belongs to the technical field of lighting equipment, and discloses outdoor camping portable mobile energy storage lighting equipment which comprises a bottom plate, a vertical rod is fixedly mounted at the top of the bottom plate, a base is fixedly mounted at the top of the vertical rod, a fixing rod is fixedly mounted at the top of the base, and a top cover is fixedly mounted at the top of the fixing rod. By arranging the cleaning block, the cross rod, the first spring and the groove, the cross rod is pulled downwards to drive the cleaning block to move downwards together, winged insects attached to the outer surface of the bulb can be scraped off in the downward moving process of the cleaning block, the winged insects fall into the groove to be stored, the cross rod is loosened, and the cleaning block can be conveniently cleaned. When the lamp bulb is used, upward force is applied to the cleaning block, so that the cleaning block is reset, winged insects are prevented from being attached to the outer surface of the lamp bulb, the external illumination area of the lamp bulb is reduced, and people cannot conveniently use the lamp bulb.

The invention discloses a pneumatic hydraulic clamp with pressurization locking and pressure maintaining functions, and relates to the technical field of clamps, the pneumatic hydraulic clamp comprises a base, a transmission box, a power assembly and a pressure arm, an adjusting plate is arranged at the left end of the pressure arm, and before a part is placed on a machining table, the height of the adjusting plate can be adjusted according to the thickness of the part to be machined; according to the clamp device, the pressing head is arranged on the machining table, so that a part can be conveniently placed between the machining table and the pressing head, backing plates do not need to be repeatedly added or reduced at the bottom of the clamp device, the operation process is simpler, and the working efficiency is greatly improved; second hydraulic oil on the movable set partition plate can enter the bottom of the piston through the hole, the piston is jacked by the hydraulic oil, when oil supply in the hydraulic oil tank is stopped, the movable partition plate is pulled back to the original position by the reset spring, a closed state is formed between the piston and the hydraulic oil tank, and the effect of continuously jacking the piston is achieved.

The invention discloses a portable temperature measuring device of wires and electrical appliances. The portable temperature measuring device comprises a temperature detection tester, a temperature measuring sensor and a housing body. The housing body comprises a base plate. The base plate is connected with a front protection plate and a back protection plate. A wire in and out hole is arranged in the back side wall of the housing body. Horizontal support frames are arranged near the edges of a horizontal support face on left and right sides of a control panel on the lower part of the horizontal support panel. The lower part of the horizontal support face of a display is connected with a horizontal support frame. The horizontal support frame is connected with a base plate via a support frame angle adjusting structure. The angle of inclination in front and back directions of the temperature detection tester of the temperature detection controller and the horizontal support frame are adjusted via a support angle adjusting structure. According to the invention, observation angle of the temperature detection controller is easily adjusted; it is easy for detectors to precisely observe the displayed measuring data; working intensity can be reduced; working efficiency is increased; and safety and reliability of detection work are ensured.

The invention discloses a urinary calculus breaking device for urology surgery. The urinary calculus breaking device comprises a shell body, wherein the left side of the shell body is fixedly connected with an internal cavity and is in sliding connection with an external cavity, the internal top of the shell body is fixedly connected with a pressure trough, a sliding plate is in sliding connectionwith the interior of the pressure trough, the bottom of the sliding plate is fixedly connected with an electric pusher bar, the electric pusher bar penetrates through the pressure trough, and the right side of the pressure trough is fixedly connected with an air inlet. According to the urinary calculus breaking device, through matched use among the pressure trough, the electric pusher bar, the sliding plate, an air intake mechanism and an air outlet mechanism, the electric pusher bar is started up to downwards push the sliding plate, air flow is sucked into the pressure trough through pushingan air inlet plate, a pushing pipe is pushed forwards, air intake of the left side will be blocked up by a barrier plate, the electric pusher bar can rise, the sliding plate extrudes gas, and then, arotary plate in a connecting pipe orifice is opened, so that the gas can pass through a connecting pipe, and whole-process stable operation of the device is achieved by using a pneumatic action of the gas.

The invention relates to the technical field of hydraulic oil cylinders, in particular to a multidirectional hydraulic oil cylinder. The multidirectional hydraulic oil cylinder comprises a hydraulic cylinder main body, wherein a rear seat is fixedly mounted at one end of the hydraulic cylinder main body; a front seat is fixedly mounted at the other end of the hydraulic cylinder main body; a movable rod is connected to one end of the front seat; a fixing plate is connected to one end of the movable rod; an adjusting mechanism is attached to one end of the fixing plate; a rotating rod is connected to one end of the adjusting mechanism; a top block is connected to one end of the rotating rod; a measuring mechanism is mounted at the upper end of the hydraulic cylinder main body; the adjusting mechanism comprises a fixing box connected to one end of the fixing plate; a rotating ball is movably connected into the fixing box; through holes are formed in the upper end and the lower end of the rotating ball; magnetic blocks are mounted in the through holes; a longitudinal adjusting mechanism is arranged at the upper end of the fixing box; and a rotating adjusting mechanism is arranged at the lower end of the fixing box. According to the multidirectional hydraulic oil cylinder, the moving distance of the movable rod can be measured when the multidirectional hydraulic oil cylinder is in use and the rotating rod can have three switching modes.

The invention discloses a disinfection device for preventing hospital infection. The disinfection device comprises a bracket, a treading device, a first sliding rail, a second sliding rail and a placement frame; the support comprises a sleeve and a base, and the sleeve is arranged on the base; the treading device comprises a pedal, a first spring, a second spring, a transmission rod and a pressing rod, the transmission rod penetrates through the support, the end, located in the sleeve, of the pedal is connected with the transmission rod, the first spring is arranged on the base and connected with the end, close to the transmission rod, of the pedal, and the second spring is arranged on the base and connected with the end, away from the transmission rod, of the pedal; the pressing rod is arranged at the upper end of the transmission rod. The first sliding rail and the second sliding rail are symmetrically arranged on the two sides of the upper end of the sleeve. The placing frame is in sliding fit with the first sliding rail and the second sliding rail; and an adjustable fixing device is arranged on the placing frame. According to the invention, through a foot stepping mode, cross infection in hospitals caused by indirect contact due to the fact that disinfectant bottles are pressed by hands in turn in hospitals is avoided.

The invention discloses an elastic clamping positioning mechanism for an inner pipe assembly of a rope coring drilling tool. The elastic clamping positioning mechanism comprises a recovery pipe, an elastic clamping frame, an elastic clamping limiting block, an elastic clamping clamp, an elastic clamping seat and a supporting plate, wherein the recovery pipe is assembled with a fishing head assembly, and the elastic clamping frame is sleeved in the recovery pipe; the elastic clamping limiting block, the elastic clamping clamp, the elastic clamping seat and the supporting plate are arranged in the elastic clamping frame, and the elastic clamping limiting block, the elastic clamping clamp and the supporting plate all comprise two parts which are symmetrical left and right; the left and rightparts of the elastic clamping limiting block are hinged together, an elastic clamping limiting block hinge shaft is mounted on the side wall of the recovery pipe, and the elastic clamping limiting block hinge shaft is further hinged to the left and right parts of the elastic clamping clamp respectively; the left and right parts of the elastic clamping clamp are hinged together, and an elastic clamping clamp hinge shaft is assembled with the elastic clamping seat; the lower end face of the elastic clamping seat is in contact with the supporting plate; and the left and right parts of the supporting plate are hinged together, and a supporting plate hinge shaft is assembled with the elastic clamping frame. According to the elastic clamping positioning mechanism, the top dead structure of the elastic clamping clamp and an elastic clamping retaining head can be released, so that elastic clamping is recovered inwards, and the purpose of smoothly completing the salvage of the inner pipe assembly is achieved.

The invention relates to the field of medical instruments, and particularly discloses a vaginal dilator for the gynecology department. The vaginal dilator comprises two handles, wherein hinge parts are arranged at the upper ends and the lower ends of the handles; the upper ends of the two handles are each connected to a placement cylinder rotationally, and the lower ends of the two handles are each connected to another placement cylinder rotationally; a core rod and a pushing jacking spring are limited in each of the two placement cylinders; the opposite end parts of two core rods are each connected to a combined seat, and two combined seats are each combined with an expansion sheet; and a non-return mechanism and a station groove are arranged in each placement cylinder, and two limiting blocks are fixed on each handle. When the handles are rotated to the position right behind the two placement cylinder, the two limiting blocks exactly enter two station grooves correspondingly, non-return mechanisms allow the two core rods to get close to the middle, and the two core rods can be prevented from getting away from each other. The vaginal dilator for the gynecology department is basedon ingenious structural design, convenient and fast to use, balanced in dilation force, sufficient in dilation space, capable of being suitable for different patients with large individual differences, and capable of being adjusted to the optimal dilation state according to the clinical actual situation.

The machine gun rack rotating device for the fighter comprises a machine gun rack base connected with a floor in a fighter helicopter, a machine gun rack rotating shaft, a machine gun rack rotating shaft and a machine gun rack rotating shaft, the machine gun supporting column is arranged on the machine gun rack base; the rotating seat is rotationally arranged on the machine gun supporting column through a rotating cross beam; and the rotating cross beam is rotationally connected with the machine gun supporting column through a needle bearing without an inner ring. Through the needle bearing without the inner ring, bending force generated by a rotating seat on the rotating cross beam can be effectively resisted, and the problems that local friction force of a rotating part is increased, a stand column is not prone to rotating, and even a machine gun rack rotating device is structurally deformed and damaged are solved.

The invention discloses a lithotripsy device for urinary calculi in urology, which comprises a casing, the left side of the casing is fixedly connected with an inner cavity, the left side of the casing is slidably connected with an outer cavity, and the casing The inner top of the body is fixedly connected with an air pressure groove, and the inside of the air pressure groove is slidably connected with a sliding plate, and the bottom of the sliding plate is fixedly connected with an electric push rod, and the electric push rod runs through the air pressure groove, and the right side of the air pressure groove The side is fixedly connected with an air inlet. In the present invention, through the cooperative use of the air pressure groove, electric push rod, sliding plate, air intake mechanism, and air outlet mechanism, the electric push rod is activated to push the sliding plate downward, and the air flow will pass through Push the blocking plate, suck it into the air pressure groove, push the push tube forward, the blocking plate will block the air intake on the left side, make the electric push rod rise upwards, the sliding plate squeezes the air, and then open the rotating plate in the connecting pipe mouth, Let the gas pass through the connecting pipe, and use the air pressure of the gas to realize the stable operation of the device throughout the whole process.

The invention relates to the technical field of fire fighting, and discloses a fire extinguisher spray head device capable of controlling the spraying state and the spraying flow through pressing. The fire extinguisher spray head device comprises a cylinder body, and the outer side of the cylinder body is fixedly connected with a limiting ring; a pressing plate moves downwards to enable a circular plate to move upwards, so that a valve plug is far away from a plug opening, gas is sprayed out from a spraying pipe, and the situation that a pressing handle is continuously held by hand, hand discomfort is caused, and the fire extinguishing progress is affected is avoided; the gas spraying flow is smaller when a moving rod is located at the second concave position of a channel; and the gas spraying flow is larger when the moving rod is located at the third concave position; the flow can be selectively changed according to fire behavior conditions, resources are appropriately saved on the basis of effective fire extinguishing, excessive waste of the fire extinguisher is avoided, when fire extinguishing is about to be finished, the pressing plate is pressed downwards once or twice, the valve plug is plugged into the plug opening, the spraying pipe does not spray gas any more, and therefore the fire extinguisher is closed, operation is convenient and fast, and the practicability is higher.

The invention discloses a pen container with a damp-proof function, the pen container comprises a container body and a base, wherein the base used for rotation and damp prevention is installed at the bottom end of the container body, and a rotating mechanism is installed between the container body and the base. A push plate is pressed, and a fixed ball barrel passes through an oval groove and then is in clamping connection to the interior of an annular groove; a limiting plate is clamped at the position of a supporting rod at the bottom end of the fixed ball barrel to limit the fixed ball barrel, so that the barrel body is rotationally connected with the base, the barrel body is rotated, the annular groove in the bottom end of the barrel body is rotationally contacted with a rotating ball, the barrel body rotates to take and place pens, and the barrel body rotates more stably; when the base is taken down, the push plate is pressed inwards, and the push rods extrude the limiting plate to relieve the limiting effect of the limiting plate on the fixed ball barrel, so that the barrel body is taken down upwards, the fixed ball barrel penetrates through the space between the two push rods, the base is separated from the barrel body, and the base rotates stably and is disassembled and assembled quickly.

The invention discloses a fire extinguisher box with a function of checking the state of a fire extinguisher. The fire extinguisher box comprises a fire extinguisher box frame, a push-pull movable door is movably inserted into one side of the front end of the fire extinguisher box frame, a square track groove is formed in the end face of one side of the fire extinguisher box frame in a penetrating manner, the push-pull movable door is movably inserted into the square track groove, and two push-pull type handles are fixedly arranged on one side of the push-pull movable door, and a mounting type long groove is fixedly formed in the middle of the lower end of the square track groove. Through insertion connection among a connecting column, an air pressure column and an airflow pipeline, the limiting installation effect on a whole cylindrical clamping piece is greatly improved, and an air pressure meter on the fire extinguisher can be disassembled and installed at any time.

The invention provides a thermal separation mechanism and a surge protection device. The thermal separation mechanism comprises a heating chip, a conducting plate and an elastic push rod component; the heating chip is provided with a leading-out end face; the conducting plate is provided with a connecting end face; the connecting end face and the leading-out end face are welded through a welding flux; the elastic push rod component comprises a first elastic part and a push rod which is provided with an insulating end; one end of the elastic part is fixedly arranged on the push rod; when the thermal separation mechanism is in a working state, the insulating end is arranged between the connecting end face and the leading-out end face in a pressing manner; when the heating chip heats until the welding flux is melted down, the connecting end face is separated from the leading-out end face; and the insulating end moves between the connecting end face and the leading-out end face under the driving of the first elastic part. The insulating end moves between the connecting end face and the leading-out end face to completely isolate the connecting end face and the leading-out end face, so that the problem of halfway release is solved.

The invention discloses a bottom valve of an oil pressure shock absorber, which comprises an inner cylinder, a hydraulic cavity is fixedly arranged inside the inner cylinder, and a sealing member is fixedly welded on the upper end of the inner cylinder, and the sealing member An installation cavity B is fixed inside the installation cavity B, and a sealing rubber ring A is fixedly installed on the upper end of the installation cavity B, and a movable ring plate is movably arranged at the lower end of the sealing rubber ring A, and the two sides of the lower end of the movable ring plate are fixedly welded An extension spring C is arranged, and the lower end of the extension spring C is welded with a pressing block. In the present invention, a clamping circular deep groove is arranged through the middle of the lower end of the inner cylinder, and an inclined ring groove is fixedly arranged around the deep circular groove. , so that the limit bayonet moves toward the inside of the installation cavity A, and realizes the rapid installation and disassembly of the bottom valve of the oil pressure shock absorber.

The invention relates to protective equipment for building engineering construction, and belongs to the field of building engineering. The protective equipment comprises a threaded pipe, the threaded pipe is rotatably connected to the top of a base, lead screws are in threaded connection in the threaded pipe; connecting plates are mounted at the top ends of the lead screws; a plurality of telescopic rods are fixedly connected to the inner sides, opposite to the base, of the connecting plates, and connecting blocks are slidably connected to the top ends of the lead screws in the vertical direction; a connecting block is in threaded connection with the top of a connecting plate; guide rods are fixed to the bottoms of the connecting blocks; guide holes are formed in the tops of the lead screws; a guide rod is slidably connected with a lead screw through a guide hole. Limiting mechanisms used for limiting the lead screw are arranged on the two sides of the lead screw correspondingly. Two connecting assemblies used for being connected with the inner circumferential face of the threaded pipe in an inserted mode are arranged in the lead screw. The protective equipment for building engineering construction has the effect that the top of the protective equipment is fixedly connected with the top face of a building conveniently.

The invention relates to a USB interface, and specifically relates to a USB cover connection structure of an electronic product. The USB cover connection structure comprises an electronic product body, wherein the electronic product body is provided with a USB interface, an upper shell and a lower shell are relatively fixed on the electronic product body, the upper shell and a rotary cover are hinged, a connection rod is fixed on the side of the rotary cover, the connection rod and a first clamp block are fixed, the lower shell is internally provided with a second clamp block matched with thefirst clamp block, the second clamp block is fixedly connected with the surface of the lower shell through a spring, the bottom of the second clamp block and one end of a pull rod are fixed, the otherend of the pull rod stretches out the surface of the lower shell and a transverse rod is fixed at the end, a middle shell is fixed on the electronic product body around the USB interface, a drive motor is fixed at the top of the middle shell, a drive shaft of the drive motor and a screw are fixed, the screw is provided with a slide block matched with the screw, and the slide block and one end ofa connection block are fixed. In the prior art, the USB interface of the electronic product cannot prevent water and dust from entering. The USB cover connection structure effectively overcomes the above defect.

The invention relates to the technical field of mobile storage devices, and discloses a mobile storage device used for software storage and capable of preventing external force ejection, the mobile storage device comprises a shell, a memory, a limiting mechanism, a matching mechanism, a starting mechanism and a reminding mechanism, the memory is movably connected to the right side of the shell, the limiting mechanism is movably connected to the interior of the shell, and the matching mechanism is movably connected to the interior of the shell. According to the mobile storage equipment for preventing the external force from popping up for the software storage, through mutual cooperation among the protection cover, the limiting arm and the matching block, after the shell and the memory are connected, the limiting arm is connected into a limiting hole in the protection cover, and under the action of external force disturbance, the protection cover and the shell have a tendency to be separated; and the interaction force between the matching block and the limiting arm can offset the acting force between the limiting arm and the protective cover, so that the movement of the protective cover is limited, the connection between the shell and the memory is prevented from being cut off, and the function of preventing the product from being popped out by external force is realized.