57results about How to "Avoid accidental displacement" patented technology

The utility model provides a ruminant living body muscle adipose tissue minimally invasive sampling device, which relates to the technical field of animal tissue sampling, and comprises an outer sleeve and an inner cutting rod, one end of the outer sleeve is provided with a needle, the other end of the outer sleeve is provided with a handle, and the outer sleeve is provided with a sampling groove close to the needle; the inner cutting rod is movably arranged in the outer sleeve, and a sampling knife is correspondingly arranged at the sampling groove. The animal sampling device has the advantages of being high in sampling efficiency, capable of reducing animal injuries, convenient, easy and fast to operate and low in cost.

The utility model discloses a telescopic seat frame with a front-back limit and a seat, the telescopic seat frame with the front-back limit comprises a base, a telescopic adjusting assembly is assembled on the base, and the telescopic adjusting assembly can reciprocate between the front end and the rear end of the base; the limiting mechanism comprises two limiting assemblies, and the two limiting assemblies are assembled at the front end and the rear end of the base correspondingly; the triggering piece is fixedly connected to the telescopic adjusting assembly and can move along with the telescopic adjusting assembly; when the telescopic seat frame is in a stretching state, the triggering piece is limited in a first limiting assembly at the front end of the base; and when the telescopic seat frame is in the storage state, the triggering piece is limited in the second limiting assembly at the rear end of the base. According to the telescopic seat frame, the limiting assemblies are assembled at the front end and the rear end of the base to limit the telescopic adjusting assembly, the telescopic seat frame can be reliably limited to be in the stretching state or the containing state, and the use experience of a user is improved.

The utility model relates to the field of electric vehicle charging equipment, in particular to a movable charging pile socket which comprises a charging pile body, one side of the surface of the charging pile body is provided with a first moving groove, one side of the first moving groove is connected with a socket panel through a moving assembly, and the moving assembly comprises a first moving block. A first moving groove is formed in the bottom end of the first moving block, a plurality of grooves are formed in the bottom end of the first moving groove at equal intervals, a limiting hole is formed in the bottom end of the first moving block, and a limiting assembly is installed in the limiting hole. According to the charging pile, the socket panel can stably stay at any required position, accidental displacement or falling of the socket panel in the charging process is avoided, the problems that a socket of a traditional charging pile is fixed in position and inconvenient to use are solved, and a more convenient solution is provided for charging of the two-wheeled electric vehicle.

This application provides a battery pack mounting architecture, a vehicle body underbody structure assembly, and a vehicle, belonging to the technical field of vehicle body underbody structure. By offsetting the power battery pack, a larger exhaust pipe mounting space is planned under the mounting frame. This allows for the installation and layout of the exhaust pipe without reducing the size of the power battery pack, without affecting the capacity of the power battery pack, thus avoiding any adverse impact on the vehicle's driving range. Because the first and second exhaust pipe mounting positions are alternately arranged in the front-rear direction, they can effectively resist horizontal forces from different directions, restricting the movement of the exhaust pipe to a very small range, thereby improving the rigidity and stability of the exhaust pipe installation. Due to the formation of a grid-like frame structure, when a collision occurs, the impact force is decomposed into multiple directions, effectively reducing the force borne at a single point, and also generating extremely high torsional rigidity, leaving sufficient survival space for passengers and preventing the doors from jamming.

This utility model discloses an automatic centering ball-distributing oscillator structure, belonging to the field of bearing assembly. The automatic centering ball-distributing oscillator structure includes an upper connecting seat, with a lower connecting seat at the bottom of the upper connecting seat. The upper and lower connecting seats are interconnected by a centering structure. This utility model solves the problems of traditional oscillating ball-distributing mechanisms, where a single soft rubber body directly connects to the ball distributor for rotational oscillation, or directly connects to an object for rotational oscillation. These mechanisms are prone to breakage of the connecting rubber body, resulting in a short service life, frequent replacement of parts, low production efficiency, and increased operating costs. More critically, when using a single soft rubber body structure, the concentricity of the oscillating component is poor, preventing automatic centering. When used in bearing production equipment, the poor concentricity of the oscillating component frequently causes it to bump against the bearing edge. This utility model patent solves all these problems, resulting in significant economic benefits.

The utility model discloses a modular hydraulically-driven strip tillage machine which comprises a machine frame connected with a tractor in a hanging mode and a plurality of tillage units arranged on the machine frame, and each tillage unit comprises an adjusting frame, a first hydraulic motor arranged on the adjusting frame and a rotary tillage knife roll directly driven by the first hydraulic motor. Each cultivation unit is in sliding connection with the rack through a sliding adjusting mechanism; the strip tilling machine is further provided with a hydraulic driving system, and the hydraulic driving system comprises a multi-way hydraulic valve set for supplying oil to all the first hydraulic motors and a row spacing adjusting oil cylinder for driving all the tilling units to synchronously move in the opposite direction or the reverse direction along the rack so as to adjust the row spacing. A first transverse rod and a second transverse rod are fixedly connected to the rack in a penetrating mode. The row spacing adjusting mechanism has the advantages of dynamic and accurate row spacing adjustment, reliable locking, simplified structure and efficient operation.

The utility model provides a mortar mixer connecting device relates to mixer technical field, including mixer, one side of mixer is installed with connecting shaft, the right end of connecting shaft is installed with bearing base, the right side of bearing base is installed with connecting assembly, connecting assembly includes the connecting flange of installation in bearing base right side, the right side of connecting flan is installed with the inlay groove, the upper end of inlay groove is installed with locking assembly, through setting up connecting assembly, adopts the design of split type, is convenient to dismouting and maintenance, through inlay gear and inlay groove close adhesion, can stably transmit power, ensure that mixer high -efficient operation, and through screw rod and moving block etc.

The utility model belongs to the technical field of logistics turnover boxes, and discloses a logistics turnover box with a reinforcing structure, which comprises a box body, a lower corner covered edge and an upper corner covered edge, the side wall of the box body is connected with a first sliding block and a second sliding block, the upper corner covered edge is in sliding connection with the first sliding block, the lower corner covered edge is in sliding connection with the second sliding block, and the lower corner covered edge is in sliding connection with the second sliding block. The lower corner wrapping edge is connected with a bottom plate and a sleeve, the sleeve is provided with a containing groove, the cross section of the containing groove is in an L shape, a plurality of second limiting holes are formed in the side wall of the containing groove, the upper corner wrapping edge is connected with a sliding pipe, the sliding pipe is connected with the inner wall of the containing groove in a sliding mode, the sliding pipe is provided with an installation groove, and the installation groove is provided with a first limiting hole and a second limiting hole. A first limiting hole is formed in the side wall of the mounting groove, a positioning elastic piece is connected to the inner wall of the mounting groove, and a positioning protrusion is connected to the positioning elastic piece. According to the scheme, adjustment of the reinforcing wrapping edge in the height direction is achieved, the logistics turnover box fixing device can adapt to logistics turnover boxes of different heights, and the application range is widened.

The invention relates to a miniature circuit breaker with multiple wiring modes, which relates to the technical field of intelligent power grids and comprises a shell, an electrical element arranged in the shell and a control handle rotationally arranged on the front side of the shell. A first wiring port is formed in the front portion of the top face of the shell, a second wiring port is formed in the back side of the shell, and a receding notch communicated with the second wiring port is formed in the rear portion of the top face. A conducting strip of which one end is connected with the electrical element is fixedly arranged in the shell, and a binding post positioned in the first wiring port and an elastic clamping piece positioned in the second wiring port are fixedly arranged at the other end of the conducting strip at the same time; a connecting plate is rotationally connected to the side wall of the receding notch, and a protection plate is vertically and fixedly arranged on the side face edge, away from the shell, of the connecting plate; a locking piece is arranged outside the shell; in the application, the connection plate can be flexibly switched to two protection states to correspondingly block the idle first wiring port or the idle second wiring port, so that dust is prevented from entering the shell and being attached to core electrical components such as the conducting strip and the binding post.

The utility model discloses a kind of metal ceramic packaging appearance semiconductor discrete device manual limiting tool, comprising: fixed frame;Two groups of pressing jaw, two groups The pressing jaw is respectively arranged on the two sides of the fixed;Article placing assembly, the article placing assembly is arranged on the fixed frame, the article placing assembly can ascend or descend along vertical direction, and the article placing assembly can be placed with the jig of workpiece;Driving assembly, the driving assembly is arranged in the fixed frame with damping rotation, and is engaged with the article placing assembly transmission, to be suitable for driving the article placing assembly ascending or descending, so that the jig on the article placing assembly is in abutment with two groups The pressing jaw is away from two The pressing jaw;When the driving assembly rotates towards clockwise direction, the article placing assembly ascends along vertical direction, so that jig is in abutment with two groups The pressing jaw, when the driving assembly rotates towards counterclockwise, the article placing assembly descends along vertical direction, so that jig is away from two groups The pressing jaw.

This utility model discloses a lawnmower with a telescopic structure, including a lawnmower and a first handle connected to the lawnmower; the first handle is provided with a second handle that can be telescopically extended; the second handle is provided with a sliding sleeve that is slidably connected to the first handle, and the sliding sleeve is provided with a locking pin; the first handle is provided with a locking hole group that cooperates with the locking pin in the axial direction, and the locking hole group is arranged in several groups around the circumference of the first handle; this utility model can drive the locking pin to disengage from the locking hole group by rotating the second grip, realizing quick unlocking with one hand, significantly simplifying the adjustment steps of the handle length and angle, and greatly improving the operating efficiency.

The utility model provides an atomizer with a tar locking function and an electronic cigarette, and the atomizer comprises a housing which is provided with a tar storage cavity which is used for storing tobacco tar; the atomization assembly is arranged on the shell, the atomization assembly is provided with an atomization channel, and the atomization assembly is used for heating and atomizing tobacco tar entering the atomization channel; the blocking component is arranged on the shell in a sliding mode, the blocking component is provided with an oil passing channel and a limiting hole, the limiting hole extends in the sliding direction perpendicular to the blocking component, and the blocking component has an initial position and a working position; at the initial position, the oil storage cavity and the atomization channel are isolated by the blocking component; the working position is that the oil passing channel communicates with the oil storage cavity and the atomization channel; and the limiting component is detachably arranged in the limiting hole in a penetrating manner, so that the blocking component is limited to the initial position. According to the oil leakage prevention structure, accidental unlocking can be avoided, the locking reliability is remarkably improved, the blocking component can stably maintain the initial position, and the oil leakage prevention performance before use is effectively enhanced.

The utility model relates to the technical field of conveying devices, and discloses continuous conveying equipment for milk powder cans, which comprises a rack, belt wheels are rotatably connected to two ends of the rack, the belt wheels at two ends of the rack are connected through a conveying belt, and transmission components are fixedly connected to rotating shafts of the belt wheels at two ends of the rack. A driving assembly is arranged on the side portion of the machine frame, one end of the driving assembly is connected with the transmission assembly in a meshed mode, a tensioning assembly is fixedly connected to the side wall of the machine frame, and one end of the tensioning assembly elastically abuts against the transmission assembly. The hydraulic piston group is driven by the electric push rod to control the diameter of the reducing wheel, the conveying step pitch can be quickly adjusted, the production requirements of various tank types are met, the continuous operation capability is improved, the tension degree of the synchronous belt is automatically maintained through the spring-pressurized tensioning wheel mechanism, slipping is effectively prevented, rigid locking is formed after a hydraulic loop is adjusted, and the service life of the hydraulic loop is prolonged. And the accuracy and the stability of the conveying step pitch are guaranteed.

The utility model discloses a kind of single motor drive double mechanism's magnetic attraction type structure, it is related to mechanical drive technical field, including driving motor, continuous mechanism and intermittent mechanism;The driving motor is directly connected with the continuous mechanism;The intermittent mechanism rotation is arranged on the continuous mechanism, and the continuous mechanism indirectly drives the intermittent mechanism by magnetic attraction;Intermittent mechanism both ends are respectively correspondingly provided with deflection limit seat one and deflection limit seat two;The deflection limit seat one, deflection limit seat two and driving motor are all fixedly connected on the shell of the household appliance using a single motor drive double mechanism's magnetic attraction type structure;Single motor can realize the differentiating motion control to the continuous mechanism and intermittent mechanism on two different planes by magnetic attraction type structure.

The utility model discloses a sand painting demonstration device which comprises a supporting frame, the supporting frame is installed on external equipment, an adjusting mechanism is arranged on the supporting frame and comprises a guiding rod, a guiding sleeve, a pushing mechanism, a limiting frame, a fixing sleeve, a connecting mechanism, a middle rod, a pushing spring, a top ball, a spring and a pressing rod, the guiding rod is installed on the supporting frame, and the guiding sleeve is installed on the supporting frame. The guide rod is slidably connected to the guide rod, the pushing mechanism is installed on the supporting frame, the design of the adjusting mechanism allows a user to adjust the height of the sand painting demonstration device according to needs so as to adapt to the heights or sitting postures of different performers, a handle and a folding plate are pressed to drive a guide sleeve to move upwards, and therefore the position of a limiting frame is changed. Due to the fact that the sand painting bearing plate is placed in the limiting frame, the height of the sand painting is adjusted along with movement, it is guaranteed that a performer can create at a comfortable and appropriate position, and the comfort level and convenience of the performer are improved through the adjusting mechanism.

This utility model relates to the field of detector technology, specifically to a glass fiber filament breakage detector, comprising: a base; a steering mechanism including a universal joint, a locking part, and a steering part, wherein the universal joint is fixedly connected to the base, the steering part is rotatably connected to the universal joint, and the locking part is located on one side of the steering part and rotatably connected to the steering part; a support mechanism fixedly connected to the universal joint; and a pneumatic detection mechanism locked to the support mechanism. This utility model solves the problem of detection accuracy attenuation caused by the collection process, ensuring the continuous accuracy of filament breakage detection.

The invention provides a circuit breaker copper sheet cutting device which comprises a lower pressing die moving up and down, a lower ejector rod is vertically arranged on the lower pressing die in a telescopic and penetrating mode, an upper limiting block is fixedly connected to the top end of the lower ejector rod, and an upper spring located between the upper limiting block and the lower pressing die is further arranged on the lower ejector rod in a surrounding mode; the upper top die is vertically and movably arranged relative to the lower pressing die, an upper top rod is vertically arranged on the upper top die in a telescopic and penetrating mode, a lower limiting block is fixedly connected to the bottom end of the upper top rod, a lower spring located between the lower limiting block and the upper top die is further arranged on the upper top rod in a surrounding mode, and a cutter is fixedly arranged on the top face of the upper top die; the supporting table is fixedly arranged and located between the lower pressing die and the upper top die, the supporting table is provided with a supporting through frame, and the upper top die can enter and exit from the supporting through frame from bottom to top. The problem that in the prior art, the whole machining efficiency is low due to the fact that a circuit breaker copper sheet is left in a cutter after being cut is solved.

The invention discloses an electrical control cabinet for building construction. The electrical control cabinet comprises a cabinet body, a fixed supporting seat, a horizontal adjusting supporting seat, an electrical element fixing device and a damping device, the electrical element fixing device comprises a bracket supporting base, an electrical element bracket and an electrical element fixing seat; the damping device comprises a first damping mechanism, a second damping mechanism and a third damping mechanism; the first damping mechanism is used for supporting the bracket supporting base, so that vibration from the ground is effectively absorbed; the second damping mechanism is responsible for tensioning the bracket supporting base to further enhance the damping effect; the third damping mechanism is used for connecting and supporting the electrical element fixing seat, so that the electrical element fixing seat is in a suspended state, and the stability of the electrical element in a vibration environment is ensured; according to the invention, the impact of vibration in a construction environment on electrical elements can be effectively reduced, stable support is provided, the reliability and safety of equipment are improved, and the failure rate is reduced.

The invention discloses a main transformer multi-mode detection device, and relates to the technical field of main transformer detection equipment, the main transformer multi-mode detection device comprises hardware and software, the hardware comprises a detection device main body, a digital display board, a connecting cable, a connecting piece, a stabilizing mechanism and a limiting piece, the software comprises a control unit, and a mounting groove is formed in the detection device main body. A mounting groove is formed in the detection device body, a detector is arranged in the mounting groove, a stabilizing mechanism is mounted between the detector and the detection device body, connecting pieces are fixedly connected to the two sides of the lower portion of the detector, the connecting pieces are detachably connected with limiting pieces, and three-phase connecting cables are fixedly connected to the sides, away from the connecting pieces, of the limiting pieces; according to the device, a rotating block is rotated to drive an adjusting block to turn over along a rotating shaft of a second mounting frame, the position of the adjusting block in a transmission groove is changed, meanwhile, when the adjusting block moves, a first transmission wheel is driven to turn over, so that a driving wheel is driven to be matched with a three-phase connecting cable, the three-phase connecting cable moves vertically, and a limiting piece is stressed to be matched with a connecting piece.

The invention relates to the technical field of drainage tube fixing, in particular to a drainage tube fixator which comprises a fixing frame and an upper catheter, a connecting and guiding opening is formed in the end of the upper catheter, the upper catheter penetrates through the fixing frame, and the end, away from the fixing frame, of the upper catheter is fixedly communicated with a lower catheter through a tube connector. A medical fixing patch is arranged on the side wall of the fixing frame, the medical fixing patch is used for fixing the fixing frame to the tail end of the sternum above the rib xiphoid process of the human body, an anti-pulling assembly is arranged in the fixing frame, and a chest patch is arranged on the side wall of the upper catheter. The device has the advantages that the fixing frame and the upper guide pipe are fixed in a specific area of a human body, the upper guide pipe is effectively prevented from shifting or falling off, the first rubber belt and the second rubber belt form a triangular structure, impulse generated by human body movement can be absorbed and buffered, direct influence on the device is reduced, meanwhile, uniform supporting force can be provided in multiple directions, and the device is convenient to use. And the fixed frame and the drainage tube are kept at relatively stable positions in daily activities of a human body.

This invention discloses a protective component and a safety helmet device, relating to the technical field of safety protection devices. The protective component includes earmuffs and a connecting arm for connecting a safety helmet. One of the earmuffs and the connecting arm has a protruding sliding post, and the other has a locking groove. The opening of the locking groove extends in a strip shape, and multiple locking positions are distributed on the sidewall of the locking groove along its extension direction. The sliding post is slidably connected to the locking groove and engages with one of the locking positions. The technical solution provided by this invention aims to reduce the difficulty of adjusting the relative position of the earmuffs and the connecting arm, ensuring the ease of use of the protective component.

The utility model discloses grinding equipment for sports equipment processing, and relates to the technical field of grinding equipment. Sports equipment is placed on a clamping base, a fourth lead screw movably moves on a fixing block, a grip is rotated, the grip drives a rotating disc to rotate, the rotating disc drives the fourth lead screw to rotate, the fourth lead screw moves leftwards, and the fourth lead screw moves rightwards; a fourth screw rod drives a movable clamping block to move leftwards, a fixed clamping block and the movable clamping block clamp and fix sports equipment, anti-skid rubber at the inner ends of the fixed clamping block and the movable clamping block can provide extra friction force, the equipment is prevented from sliding or accidentally shifting in the using process, and therefore the safety of a user is enhanced, the equipment can be effectively fixed, and the use safety of the user is improved. The grinding main body is made to be stable, potential damage risks are reduced, meanwhile, scratches and abrasion on the surface of the equipment are reduced, the appearance and functions of the equipment are kept intact, the whole grinding main body is fixed through the fixing base, and the grinding main body can be prevented from moving or shaking in the machining process.

The invention provides a switching locking device, a rack rail vehicle power switching system and a rack rail vehicle. The switching locking device is arranged in the gearbox and comprises a gear part and a rotating shaft connecting part fixedly arranged on the switching support, the gear part is provided with a plurality of locking gears, and the locking gears comprise a toothed rail gear, a neutral gear and an adhesion gear which are sequentially arranged in the length direction of the rotating shaft connecting part; the sleeve is fixedly arranged on the gear box, and a guide cavity is formed in the sleeve; at least part of the gear locking piece extends out of the guide cavity, and the gear locking piece is used for selectively locking the gear of the rack rail, the adhesion gear or the neutral gear; the adjusting assembly is arranged in the guide cavity and used for providing elastic jacking force for the gear locking piece so that the gear locking piece can be locked at the locking gear. According to the switching locking device, the power gear can be flexibly adjusted, and the switching precision and stability of rack rail power and adhesion power are improved.

The utility model discloses a MASK photomask surface particulate matter removing device which comprises a base, a supporting frame is fixedly arranged on the base, an adjusting arm is connected to the supporting frame, a mounting plate is connected to the top end of the adjusting arm, a spray head is fixedly arranged on the mounting plate, a flow adjusting mechanism is arranged at the top end of the spray head, and the flow adjusting mechanism is arranged on the top end of the spray head. The flow adjusting mechanism comprises a mounting sleeve, a sliding groove, a sliding block, baffles, a connecting plate, an adjusting sleeve and an external pipe, the flow adjusting mechanism adopts a multi-baffle linkage adjusting design, synchronous opening and closing of the baffles are achieved through cooperation of the sliding block and the sliding groove, and the sectional area of an airflow channel can be accurately adjusted according to the requirements of particulate matter with different particle sizes; the pain point that a traditional device cannot precisely control the air flow is solved.

This utility model provides an integrated suction and irrigation instrument for oral surgery, belonging to the technical field of oral surgical instruments. It includes an irrigation tube and a suction tube, which are connected by welding. A connecting block is fixedly installed on the surface of the irrigation tube. A groove is formed inside the connecting block, and a rotating shaft is fixedly installed inside the groove. A connecting rod is rotatably connected to the surface of the rotating shaft. A locking block is fixedly installed at the bottom end of the connecting rod, and a hook is fixedly installed on the surface of the locking block. This allows the instrument body to be stably suspended or locked at a fixed point near the surgical area, such as the edge of a tray or a cloth. A magnet initially adheres to the instrument surface, ensuring that the locking block remains closed and stored when not in use, preventing random shaking and eliminating the need to find a placement location or worry about contamination. Through the synergy of mechanical structure and magnetic adsorption, temporary fixation and rapid retrieval of the instrument are achieved.

The utility model discloses a kind of electric wheelchair controllers of convenient dismounting, including controller body, the sidewall of controller body is fixedly connected with mounting rod, the outside of mounting rod is provided with fixed block, the inside of fixed block is provided with quick release component for the quick release of mounting rod, the inside of fixed block is provided with limiting component for the limiting of mounting rod.Quick release component for the quick release of mounting rod is set, only needs to be inserted mounting rod and can be completed preliminary limiting by rotating, reverse operation can be disassembled, without tool, substantially improve maintenance or replacement efficiency, and using limiting component carries out secondary limiting to mounting rod, avoid accidental displacement in use, ensure that controller is stable and reliable in driving.

According to the sensor position adjusting device and the semiconductor device, when the sensor position adjusting device works, a gear transmission mechanism in a driving unit drives an adjusting block to move on a guiding unit in the first direction through gear meshing transmission, so that a sensor arranged on the adjusting block moves in the first direction. When the gear transmission mechanism carries out transmission, accidental displacement in the adjusting process can be effectively prevented, so that the position of the sensor arranged on the adjusting block is not prone to deviation, the stability and accuracy of sensor position adjustment are guaranteed, the risk of introducing errors in the operation process is reduced, and accurate adjustment of the position of the sensor can be achieved.

The invention discloses a double-layer switch cabinet and a using method thereof. The double-layer switch cabinet comprises a cabinet body, a first handcart device, a second handcart device, a supporting moving device, a cabinet body separating device and a guiding locking device. A first cable chamber, a second cable chamber, a bus chamber, a first handcart chamber and a second handcart chamber are arranged in the cabinet body; the supporting and moving device comprises a supporting side plate, a first supporting mechanism, a second supporting mechanism and a hinged folding connecting rod mechanism. The using method of the double-layer switch cabinet comprises the steps that the second supporting mechanism is pushed in the horizontal direction, so that the hinged folding connecting rod mechanism obliquely and downwards turns over and moves in the direction away from the cabinet body with the hinged position of the hinged folding connecting rod mechanism and the supporting side plate as a rotating shaft; the second supporting mechanism synchronously moves to the position close to and flush with the first supporting mechanism in the horizontal direction and the vertical direction in the horizontal state; a transfer trolley is not needed, the overhaul and maintenance efficiency is improved, and meanwhile the workload and the safety risk of operators are reduced.

The utility model belongs to the technical field of pianos, and particularly relates to a string wire unwinding device which comprises a base, the base comprises a fixed disc, the top of the fixed disc is rotatably connected with a rotary disc, a chassis is placed on the upper end face of the rotary disc, the center of the inner side of the chassis is connected with a center piece, and the top of the center piece is provided with a wire guiding mechanism. The wire guiding mechanism comprises a positioning column rotationally connected to the top end of the center piece, and a wire guiding frame is rotationally connected to the positioning column; a protective cover is inserted into the base plate, the protective cover is in a circular truncated cone shape with an opening in the bottom end, a wire outlet pipe is fixedly connected to the top of the protective cover, and the wire outlet pipe and the protective cover are communicated with each other. Through the arrangement of the base and the rotating disc, the steel string coil is placed more stably; the base plate is placed on the rotating disc, the rotating disc is connected with the bearing seat through the bearing column, stable rotation of the rotating disc is achieved, and the problems of steel string loosening and knotting caused by inclination or movement of a steel string roll in a traditional unwinding device are solved.