34results about How to "Avoid accidental disengagement" patented technology

This utility model relates to the field of battery manufacturing technology and discloses a battery module hoisting anti-detachment device, including a hook, a limiting member, and a limiting mating member. The hook has multiple notches along its length. The limiting member can move up and down relative to the hook. The limiting member has a limiting hole corresponding to the notch. The limiting mating member passes through the limiting hole and is movably connected to the notch. When the limiting mating member is connected to the notch, the limiting member and the hook are locked. When the limiting mating member is separated from the notch, the limiting member and the hook are unlocked. This utility model can achieve locking or unlocking through the movable connection between the limiting mating member and the notch, effectively preventing the hook from accidentally detaching from the module mounting ear hole and improving hoisting safety. The limiting member can move up and down and mate with multiple notches, which can flexibly adapt to different module mounting ear hole positions and has strong adjustability. The overall structure is simple and compact, easy to operate, easy to use with existing module mounting ear holes, and has strong versatility, high efficiency, and good safety.

The utility model discloses a hazardous chemical substance leakage detection sensor, which belongs to the technical field of hazardous chemical substance leakage detection, and is characterized by comprising a container main body, the top of the container main body is fixedly connected with an installation mechanism, and the top of the container main body is fixedly connected with an auxiliary mechanism. A detection sensor main body is clamped on the inner wall of the top of the mounting mechanism; the installation mechanism comprises an installation seat, an assembly ring, a ring groove, an insertion groove, a sliding groove, an installation cylinder, a telescopic rod, a plug and an insertion hole, through the design of the installation mechanism, such as the cooperation of the structures of the installation seat, the assembly ring, the telescopic rod, the plug and the insertion hole, rapid installation and disassembly of the detection sensor main body are achieved, and during installation, the assembly ring is movably connected with the installation seat; the mounting cylinder is pushed to insert the plug into the jack, so that the mounting is completed; and during disassembly, the detection sensor main body can be conveniently taken down only by pulling the plug to be separated from the jack, so that the operation is simple and convenient, and the use efficiency is improved.

The utility model belongs to photovoltaic support technical field, concretely is a kind of centralized fixed grid-connected photovoltaic support, including pedestal, first support rod, second support rod, fixed inclined shaft, fixed cross shaft, reinforcing rod, connecting piece, circular clamp, single-side pressing block and double-side pressing block, support rod is embedded in the upper portion of pedestal, wherein the lower portion of first support rod is connected with the lower portion of reinforcing rod by circular clamp, the upper portion of support rod and the upper portion of reinforcing rod are connected with fixed inclined shaft by connecting piece, four fixed cross shafts of equidistance are installed on the upper portion of fixed inclined shaft.The utility model structure design is simple and reasonable, and it is universally applicable for large-scale centralized grid-connected photovoltaic power station construction in different terrain, can bear the weight of photovoltaic module, wind load and snow load and other external force in actual application, ensure that photovoltaic module keeps safe and stable operation under various environmental conditions, convenient for later operation and maintenance, save artificial cost.

The utility model discloses a headlamp with a heat dissipation structure, which comprises a lampshade, and one side of the lampshade is fixedly connected with a mounting plate; and the protection mechanism comprises a frame plate fixedly connected with one side of the mounting plate. The protection mechanism is arranged, the frame plates provided with the air supply fan and the air draft fan respectively are additionally arranged on the mounting plate, the filter screen plates are additionally arranged on one side of each fan, the filter screen plates and the frame plates are fixed through the clamping blocks and the fixing blocks, the clamping blocks are stably inserted into the fixing blocks through the locking mechanisms, and the filter screen plates are locked and fixed on the frame plates. The phenomenon that the filter screen plate is accidentally separated from the frame plate is avoided, dust can be filtered through the filter screen plate in the heat dissipation process of the headlamp, the probability that the headlamp is affected by the dust is reduced, and the protective measure for heat dissipation of the headlamp is improved.

The utility model belongs to fitness equipment technical field, especially relates to a fat -burning machine, including the base and support plate of rotation connection, be provided with the drive device of drive support plate swing on the base, drive device includes the drive motor and drive part that set up on the base, drive motor and drive part between be provided with transmission assembly, drive motor can drive drive part reciprocating motion horizontally on the base through transmission assembly, drive part upper and lower two sides respectively be provided with the drive surface and support surface of inclination, be provided with the abutting portion for abutting the drive surface on the support plate, be provided with the support portion for supporting the support surface on the base, drive motor control drive part reciprocating motion process, drive part slide on the support portion, drive surface can slide with abutting portion opposite, and make support plate and base swing opposite, the utility model discloses the purpose lies in providing a kind of long service life's fat -burning machine.

The utility model provides a kind of prefabricated leakage orifice mould for prefabricated T beam, it is related to a kind of prefabricated leakage orifice mould technical field for prefabricated T beam, including leakage orifice mould body, the upper portion of leakage orifice mould body is provided with lifting frame, lifting frame rests on the both sides mode of prefabricated T beam, the downward fixed connection of lifting frame is opposite the boom of the position of leakage orifice mould body, the lower end of boom is provided with connecting mechanism, the top of leakage orifice mould body is fixedly connected with inverted U type pull rod, and the connecting mechanism is detachably fixedly connected to pull rod.The utility model is by setting detachable connecting mechanism, the installation of leakage orifice mould body can be conveniently disassembled, lifting frame is used, the vertical position of leakage orifice mould body can be accurately positioned, and leakage orifice mould body is lifted after pouring and is removed, save time and labour, avoid damaging leakage orifice inner surface.

The utility model relates to the technical field of scaffolds, in particular to a scaffold capable of being quickly assembled and disassembled, which comprises at least four vertical rods, transverse rods I and transverse rods II, the vertical rods are vertically arranged, the transverse rods I and the transverse rods II are horizontally arranged among the vertical rods, the transverse rods I are transversely arranged, the transverse rods II are longitudinally arranged, and the transverse rods I and the transverse rods II are vertically arranged. The clothes hanger is characterized in that a fixing plate is fixed to the outer side wall of the vertical rod, clamping pieces are fixed to the two ends of the first transverse rod and the two ends of the second transverse rod, and the clamping pieces are detachably connected with the fixing plate; by arranging the fixing plate and the clamping piece, connection can be completed by inserting the first connecting plate into the second groove hole, disassembly can be completed by moving the transverse rod upwards to enable the first connecting plate to be separated from the second groove hole, and rapid installation and disassembly can be achieved; the two independent anti-falling mechanisms are arranged and do not affect each other, due to the open groove of the special structure, the second connecting plate is unfolded by means of the gravity of the second connecting plate under the action of no external force, the clamping piece is prevented from being accidentally separated from the fixing plate, and safety is improved.

This utility model discloses a plate dumbbell, relating to the field of fitness equipment technology. The plate dumbbell consists of a connector, dumbbell plates, and a dumbbell bar. The screw of the connector passes through the dumbbell plates and is inserted into the dumbbell bar. Locking devices are provided on the connecting terminals at both ends of the dumbbell bar. One end of the locking device engages with the screw of the connector to fix the screw, so that the end of the connector and the connecting terminal clamp the dumbbell plates to form the plate dumbbell. When the screw is disengaged from the dumbbell bar, the screw can slide relative to the dumbbell bar, which facilitates quick adjustment of the position of the connector and completes the assembly and disassembly of the dumbbell plates, realizing the rapid assembly of the plate dumbbell. By moving the locking device, the fixing and loosening of the connector can be controlled, thereby completing the assembly and disassembly of the dumbbell plates and adjusting the weight of the plate dumbbell. The locking device in this plate dumbbell has a simple structure and is easy to operate.

The utility model provides a kind of energy accumulator damping structure, it is related to energy storage equipment technical field, including: tank, the one side of tank is provided with base, the one side of base is provided with fixed mechanism.The utility model, by setting fixed mechanism, fixed block inserts inside fixed seat, and it is fixed to fixed block by pushing fixed plate to insert inside fixed seat, and rotating bottom block drives threaded rod to rotate, and sleeve frame gradually moves and drives clamping block to move, and clamping block inserts inside fixed plate and limits its position, and fixed plate is stably fixed to fixed block, i.e., tank and base are fixed between, and tank and base have good stable fixing measure between, avoid unexpected separation phenomenon between tank and base, reduce the probability that tank appears unexpected damage, improve the stability of tank and base between fixed, improve the damping effect of tank on base.

This utility model belongs to the field of trolley technology, and specifically relates to a trolley that facilitates straight-line travel. It includes a balance scooter and a trolley body, connected by a connecting frame. The connecting frame is detachably connected to the trolley body and rotatably connected to the balance scooter. The balance scooter has a positioning groove, and the connecting frame has a positioning element and an elastic element. The elastic element drives the positioning element to engage with the positioning groove, fixing the balance scooter and the connecting frame relatively, thus allowing the trolley to maintain straight-line travel or maintain a certain angle of rotation. Under external force, the positioning element can move relative to the positioning groove, allowing the balance scooter and the connecting frame to rotate relative to each other, thus enabling the trolley to turn flexibly. The purpose of this utility model is to provide a user-friendly trolley that facilitates straight-line travel.

The utility model discloses an easy to collect waste material's machine edge rubbing crusher for rubber production relates to rubber production equipment technical field, including base, its characterized in that the top of base is inlayed and is equipped with the blanking frame, the top of base is equipped with the rubbing frame in the top of blanking frame, two intermeshing rubbing rollers are rotatably connected in the rubbing frame, the one side fixedly connected with motor box of driving two rubbing rollers of rubbing frame is rotated, the top fixedly connected with feeding frame of rubbing frame, one side of base is equipped with the feeding mechanism that links with feeding frame. The utility model discloses through the cooperation of installation groove and fixed bolt, makes the stable fixing of screening net and is convenient for replacing, and through the cooperation of limiting groove, limiting strip and rotating block, ensures that the first collecting frame is positioned stably under the vibration environment.

The utility model relates to an interventional postoperative puncture port air bag compression bag which comprises wrapping cloth and an air bag, a waist bandage is arranged on the outer upper edge of the wrapping cloth, the waist bandage is wound around the waist of a patient and is fixed through hook-and-loop fasteners in a sticking mode, and a leg bandage is arranged on the outer lower edge of the wrapping cloth, is wound around the thighs of the patient and is fixed through hook-and-loop fasteners in a sticking mode. The bag is arranged on the inner surface of the wrapping cloth and is pressed at the interventional operation puncture port of the patient, the bag is provided with an inflation port, the inflation port is connected with an inflation balloon, and the inflation balloon is provided with a deflation valve. The wrapping cloth inner face bag is fixed to the crotch of a patient through the waist binding band and the leg binding band, compression hemostasis is conducted on an interventional operation puncture opening, firmness is good, wearing is comfortable, and the hemostasis effect is good. The length of the waist bandage and the length of the leg bandage can be adjusted according to needs, and the device is suitable for patients of different body types. The inflatable balloon is extruded to inject air into the bag, the vent valve is opened to discharge air out of the bag, the compression degree of the bag can be adjusted, and operation is easy and convenient.

The utility model discloses an ultrasonic detector for ground surface crack detection, which relates to the technical field of ultrasonic detectors and comprises a host and a detection probe, a treading mechanism is arranged on the detection probe, the detection probe comprises a transducer and a data line, and the transducer is in data transmission with the host through the data line. The treading mechanism comprises a sliding sleeve, a pedal clamping plate and an elastic band, the sliding sleeve sleeves the outer end of the transducer and is slidably connected with the transducer, a first rotating shaft is arranged at the bottom of the side end face of the pedal, and the pedal is rotatably connected with the sliding sleeve through the first rotating shaft; the upper ends of the elastic bands are fixed to the ends, away from the second rotating shaft, of the clamping plates. The handheld ultrasonic detector has the advantages of being convenient to operate, efficient, stable and convenient to carry, and solves the problems that a traditional handheld ultrasonic detector is inconvenient to operate and low in efficiency and causes burden to the body of an operator.

The anti-falling lifting hook comprises a hook head, the top end of the hook head is fixedly connected with a connecting block, the top surface of the connecting block is fixedly connected with a connector, and the opening end of the hook head is rotationally connected with a protective rod; two limiting plates arranged at intervals are fixedly connected to the side wall of the end, close to the protection rod, of the connecting block, the two side walls of the top of the protection rod are slidably connected with the inner side walls, right opposite to the two limiting plates, of the two limiting plates correspondingly, and limiting assemblies used for limiting rotation of the protection rod are arranged on the two limiting plates. The lifting hook can be suitable for lifting ropes with different diameters, the applicability of the lifting hook is improved, and the situation that when the lifting rope is thick, the lifting hook cannot be closed, and consequently the anti-falling function fails is avoided.

The utility model provides an electrical switch electrical contact stamping shaping device, which relates to the technical field of electrical switch electrical contact processing, and comprises a device body, one side of the device body is fixedly connected with a connecting guide rail, one end of the connecting guide rail is provided with a feeding vibration disc, and one side of the feeding vibration disc is provided with a protection mechanism. According to the feeding device, the protection mechanism is arranged, the side block is pushed to drive the clamping rod to move, after the side block cannot be pushed, the fixing block on the top cover is inserted into the side plate, after the side block is loosened, the clamping rod is actively inserted into the fixing block through the elastic force of the spring, and therefore the top cover and the feeding vibration disc can be connected and fixed, and the top cover is used for shielding the feeding vibration disc; and the situation that the workpieces are accidentally disengaged from the interior of the feeding vibration disc in the workpiece feeding process of the feeding vibration disc is avoided, the probability that the workpieces cannot be normally fed is reduced, the workpiece feeding stability of the feeding vibration disc is improved, and the workpiece machining efficiency of the device body is improved.

The utility model discloses a kind of protective tool for coil shaping, including circular disc body, bundling belt and pre-embedded block, through hole being cooperated with stator inner hole is set in the middle of body, the concave protection groove of body surface is set, lead hole allowing thermistor to pass is set in protection groove, thermistor is placed in protection groove, and is fixed by bundling belt;Pre-embedded block is installed in the thermistor installation position of stator inside.The utility model sets up disc-shaped protective tool in end part, and sets up protection groove in protective tool, force when coil shaping is borne by protective tool, play the protection of thermistor, avoid thermistor damage.Body is recessed mode, and cooperates first air-avoiding groove and second air-avoiding groove to hide installation bundling belt, avoid that bundling belt breakage causes protective tool accidental disengagement.Pre-embedded block is assembled by multiple components, easy to install and can be quickly connected with body.

This disclosure provides a support structure, a generator assembly, and a wind turbine generator set. The support structure is suitable for generators and includes a support body and a connecting assembly. The support body includes an elastic body for absorbing vibrations. The connecting assembly includes a connecting body and an adapter sleeve. The connecting body is connected to the support body, and a first end of the connecting body supports the generator. The adapter sleeve is disposed at a second end of the connecting body. The connecting body has a mounting hole, and the adapter sleeve is detachably disposed within the mounting hole. The adapter sleeve has a connecting portion configured to receive a connector for connection with the generator. The adapter sleeve and the connecting body are detachably connected, and the adapter sleeve and the connector are matched and connected, facilitating the replacement of the adapter sleeve. This allows the support structure to adapt to different connectors, and thus to different generators.

The present application relates to a kind of anti-static sampling rope resistance automatic measuring device, the device includes power transmission mechanism, support vertical plate, including winding center roller and insulating wood board roller winding device, including ball screw and moving support wire arranging guide device and measuring device;Winding center roller is radially provided with rectangular recess and inserts insulating wood board, and spiral recess is provided on insulating wood board.The ball screw is set in the middle of equal-diameter parallel guide rod on both sides, moving support inboard is close to the abutment of the winding center roller, and the outside is connected with guide rod, and the middle is connected with the internal thread hole matched with ball screw.The present application can realize the effect of stable winding by the rotation of screw rod driving moving support translation, and can realize stable winding effect by the configuration transmission parameter of transmission system;Meanwhile, a variety of protection means such as tension detection, emergency brake and the like are combined, the strength of sampling rope is guaranteed within the safe range, and the rope is prevented from accidental disengagement.

The utility model discloses a portable wireless AP, which comprises a shell, a base, a mainboard and an antenna, a clamping part is arranged on the back surface of the shell; the base is used for being fixed to a wall, a clamping groove and an anti-disengaging structure are arranged on the front face of the base, the clamping part is arranged in the clamping groove in a vertical sliding mode, and the anti-disengaging structure is arranged at an opening in the upper portion of the clamping groove and used for preventing the clamping part from sliding out of the clamping groove; the main board is arranged in the shell; and the antenna is arranged at the top of the shell, and the antenna is electrically connected with the mainboard. By arranging the clamping part and the clamping groove, the shell and the base are clamped in a sliding mode, during installation, only the clamping part needs to slide into the clamping groove from top to bottom, only the clamping part needs to slide out of the clamping groove from bottom to top in a detachable mode, great convenience is achieved, the clamping part can be prevented from being accidentally disengaged from the clamping groove due to the arrangement of the anti-disengagement structure, and installation is convenient. And the connection stability of the shell and the base is improved.

The utility model discloses a kind of open-close bottle caps, including the mounting seat for connecting bottle body, the mounting hole for spout insertion is equipped on the mounting seat, the open-close cover for opening and closing spout is also rotatably connected on the mounting seat, the lower part of the mounting seat is rotatably connected with the lock block that can extend inward and can limit mounting seat from spout after spout is inserted into mounting hole, the lower part of the open-close cover is equipped with the restriction structure that can limit open-close cover rebound when its opening angle is greater than preset angle, by rotatable lock block being set in the lower part of mounting seat, when spout is inserted into mounting hole, lock block extends inward and clamps spout root portion or shoulder position, form mechanical limit, the restriction structure set in the lower part of open-close cover, automatically act when its opening angle exceeds preset angle, can limit open-close cover rebound under the action of elastic connecting piece, avoid open-close cover sudden closing, also simultaneously convenient for user to need not to keep open state with sustained effort when pouring or drinking.

The application relates to the technical field of fabricated building, in particular to a green building component based on BIM (Building Information Modeling) for fabricated building design, which comprises a pre-embedded part, an assembly body and a locking mechanism arranged between the pre-embedded part and the assembly body and used for realizing quick assembly positioning and stable connection of the pre-embedded part and the assembly body; wherein the locking mechanism comprises a plurality of groups of fixing members fixed to the top of the pre-embedded part and a plurality of groups of extrusion heads fixed to the bottom of the assembly body, each group of the extrusion heads is one-to-one corresponding and adaptively matched with the fixing members, the extrusion head can be inserted into the fixing member and is locked through elastic driving, the tapered bottom end of the extrusion head is matched with the chamfer of a limiting member, axial insertion force is converted into radial expansion force, meanwhile, the corresponding design of the plurality of groups of the fixing members and the extrusion heads ensures synchronous alignment and locking during assembly, assembly deviation caused by uneven stress is avoided, construction efficiency and assembly quality are further improved, and the application is suitable for large-scale industrial production requirements.

The utility model relates to the technical field of chip testing, and provides a direct current probe installation structure which is installed on a rack and comprises a probe arm, a probe and a connecting assembly, the probe arm is installed on the rack, and the probe is connected with the probe arm through the connecting assembly; one end of the probe is provided with a connecting piece, and one end of the probe arm is provided with a connecting groove for inserting the connecting piece; the probe arm is provided with a first plug-in groove communicated with the connecting groove, and the connecting piece is provided with a second plug-in groove communicated with the first plug-in groove. The connecting assembly comprises an anti-disengaging rod and an anti-disengaging part, the anti-disengaging rod is inserted into the first inserting groove and the second inserting groove, and the anti-disengaging part is used for preventing the anti-disengaging rod from disengaging from the second inserting groove. According to the direct current probe installation structure provided by the invention, the probe can be conveniently replaced.

The utility model relates to the technical field of medical equipment, in particular to a trachea connector and an endoscope cleaning and disinfecting machine using the trachea connector, the trachea connector comprises a male end plug and a female end socket which are mutually plugged, and a linkage connecting assembly is arranged at a connecting port of the female end socket; the outer wall of the male end plug is provided with an annular clamping groove along the circumference. The linkage connecting assembly comprises a pressing clamping piece, a linkage clamping piece and an orthogonal linkage structure. The pressing clamping piece is installed in a sliding mode in the radial direction of the female end socket, a bayonet is formed in the pressing clamping piece, and the male end plug can be inserted into the connecting port and the bayonet of the female end socket. The linkage clamping piece is installed in a sliding mode in the axial direction of the female end socket. The pressing clamping piece and the linkage clamping piece are in linkage through an orthogonal linkage structure, and the orthogonal linkage structure is used for driving the clamping opening to be inserted into the annular clamping groove, so that the technical problems that a thread sealing structure is adopted in a traditional air pipe connector, the installation effect is poor, and the disassembly and assembly efficiency is low are solved.

This utility model relates to the field of high-voltage power testing technology and discloses a quick clamp for high-voltage testing of power cables, including a clamp plate one and a clamp plate two. The clamp plate one and the clamp plate two are hinged by a pin. A rotating column is rotatably connected to an adjacent side of the clamp plate one and the clamp plate two. An elastic component for auxiliary cable clamping is installed on an adjacent side of the two rotating columns. Insert plates are installed on the upper and lower sides of the elastic component. An insert post that engages with the rotating column is fixedly connected to the rear side of the insert plate. An inclined column that engages with the rotating column is slidably connected to the inner wall of the insert plate. A clamping pad is fixedly connected to an adjacent side of the clamp plate one and the clamp plate two. A connecting wire passes through the inner wall of one of the clamping pads, and one end of the connecting wire is provided with a contact point. In this utility model, the squeezing column, the inclined column and the spring two cooperate. The clamping can be released by pulling out the stop block and pressing the squeezing column, realizing quick replacement of the spring one without disassembling the whole, shortening maintenance time and improving usage efficiency.

The application relates to the technical field of containers and provides a containing device. The containing device comprises a containing bottle, a shell, a sleeve and a fixing piece, the shell is provided with a first containing cavity, the bottom of the shell is provided with a first opening, the containing bottle is arranged in the first containing cavity through the first opening, the sleeve is fixed to the inner side wall of the shell, the inner side wall of the sleeve is provided with a track groove, the track groove is provided with a first fixing position and a second fixing position, the outer side wall of the fixing piece is provided with a plurality of sliding blocks, the sliding blocks are slidingly arranged in the track groove, the bottom of the fixing piece is provided with a locking buckle, the locking buckle is suitable for locking the bottle mouth of the containing bottle, and an elastic piece is further arranged between the top of the fixing piece and the shell. The containing device provided by the application realizes the detachable and locking of the containing bottle through the sliding cooperation of the fixing piece and the sleeve, the containing bottle can be quickly and detachably arranged in the shell, the containing bottle can be conveniently replaced or filled and then reused, the containing device can be cyclically used, and the cost can be greatly saved.

The utility model relates to packing bottle technical field discloses a self -sealing valve core liquid outlet bottle, including bottle body, shoulder cover and lid, the inner chamber of shoulder cover is installed with inner plug, the inside of shoulder cover is equipped with liquid outlet passage, the inner chamber of liquid outlet passage is equipped with liquid outlet subassembly, and the liquid outlet subassembly includes plug and spring, the surface outside of plug is equipped with annular part, and annular part is in contact with the inner wall of liquid outlet passage, the utility model discloses supporting plug through spring, and the annular part and conical part on plug and the inner wall of liquid outlet passage are in contact and form sealing point one, and when using, press plug can realize liquid outlet, and when sealing, realize sealing by the elasticity of spring, and the inner chamber of liquid outlet passage is blocked again, convenient to use, after lid installation, the inner wall of fixed sealing sleeve and shoulder cover top outside contact and fit and form sealing point two, and then realize second layer sealing, and sealing point two cooperate sealing point one's use, realize double sealing, can effectively avoid liquid leakage.

The utility model discloses an extreme marine environment resistant high strength outfitting plate, and particularly relates to the technical field of ship engineering materials, the plate comprises a plate body, the plate body comprises a panel, a core layer and a back plate which are sequentially arranged from outside to inside, and a repair structure is arranged in the plate body. By arranging the repairing structure, when the outfitting plate has tiny cracks or is damaged due to complex stress in an extreme marine environment, seawater erosion and other factors, the microcapsules which are uniformly distributed in the base material layer in advance are broken due to the expansion of the cracks, so that the repairing agent stored in the microcapsules is released immediately, and the repairing effect of the outfitting plate is improved. The released repairing agent can be in rapid contact with the catalyst on the surface of the base body layer, under the efficient effect of the catalyst, the repairing agent is rapidly subjected to a polymerization curing reaction and can be accurately filled into crack gaps, perfect filling of the cracks is achieved, further expansion of the cracks is prevented in time, and the structure of the outfitting plate is continuously stabilized.

The utility model relates to the technical field of safety belts, in particular to a safety belt retractor fixing structure which comprises a supporting mechanism, a fixing mechanism and a locking mechanism. The connecting seat is mounted on the supporting mechanism, and a notch for inserting the retractor is formed in the connecting seat; the mounting piece is mounted on the connecting seat, and a sliding block is mounted in an inner cavity of the mounting piece in a sliding manner; the positioning pin is fixedly installed on the sliding block, the positioning pin penetrates through the through hole of the connecting base, the positioning pin is connected with the fixing hole in the retractor in a pluggable mode, and an oblique angle is arranged on the positioning pin and used for being directly inserted into or pulled out of the retractor; the adjusting mechanism is mounted on the mounting piece, a spring is mounted on the adjusting mechanism, and the other end of the spring is mounted on the sliding block; the detection efficiency is improved, and the labor intensity is reduced.