34results about How to "Avoid offset situations" patented technology

The utility model relates to laminated board processing technical field, and specifically is a kind of thermoplastic laminated board processing's auxiliary laying positioning tool, comprising: hot-pressing device, the hot-pressing device is provided with the article plate and lifting plate, the lifting plate is opened with composite groove, positioning clamping assembly is arranged between the lifting plate and article plate, the positioning clamping assembly includes horizontal positioning structure and longitudinal positioning structure, the horizontal positioning structure and longitudinal positioning structure slidingly set in the mobile slot of the article plate opening is set in;The hot-pressing device is also provided with driving assembly, the driving assembly is connected the horizontal positioning structure and longitudinal positioning structure, under the cooperation of the composite groove and guide groove, the driving assembly can successively drive the longitudinal positioning structure and horizontal positioning structure towards the center of the article plate close, to carry out integration positioning to the multilayer plywood on the article plate.

The utility model discloses a synchronous speed -regulation's glass -steel traction machine antiskid clamping mechanism, including mounting panel, the symmetrical bottom plate that is equipped with on mounting panel, is equipped with the top plate through the lifting assembly on mounting panel, is equipped with synchronous conveying assembly between two bottom plates, two top plates, the symmetrical limit mechanism that is equipped with in two ends of two top plates, limit mechanism and lifting assembly are matched. The utility model lifting assembly lower supporting plate is fixedly connected with mounting panel through fixed column, can play the guiding and spacing effect in the glass -steel conveying traction process, avoid the deviation of glass -steel, guarantee the accuracy of conveying direction, the upper clamp plate in spacing mechanism is connected with the connecting plate through buffer assembly, and is matched with lower supporting plate, in the glass -steel conveying traction process, can cooperate lifting assembly and carry out the clamping and fixing and spacing of glass -steel, effectively prevent the deviation of glass -steel, guarantee the smooth operation of traction process.

This utility model relates to the field of coating machine technology, and more particularly to a woven fabric coating machine. The utility model includes a coating box, with electric rollers rotatably connected to both ends of the inner side of the coating box. Guide grooves are formed on both sides of the coating box, located in the middle. Resistance rollers are slidably connected to the inner sides of the guide grooves. An arc-shaped plate is slidably connected to the inner side of the coating box, above the resistance rollers. A coating roller is rotatably connected to the bottom end of the inner side of the arc-shaped plate. The woven fabric coating machine provided by this utility model conveys the woven fabric from the electric rollers and resistance rollers. A hydraulic rod is activated to drive the arc-shaped plate and the coating roller to apply pressure to the resistance rollers, enabling the coating roller to effectively coat the upper surface of the woven fabric. The pressure from the hydraulic rod effectively increases the uniformity of the coating on the woven fabric.

The application provides a clothes batch production template and a processing method thereof, and relates to the field of clothes production. The clothes batch production template and the processing method thereof comprise an upper clamping plate and a lower clamping plate, the upper clamping plate is hinged to the lower clamping plate, a module is fixedly installed in the interior of the upper clamping plate and the lower clamping plate, a plurality of marking grooves are formed in the interior of the two modules, a collar sewing groove and a fly sewing groove are formed in the interior of the two modules, and a collar guide rail and a fly guide rail are respectively formed in the upper part of the collar sewing groove and the fly sewing groove located on the upper part. The clothes batch production template and the processing method thereof are integrally manufactured by a template for producing a collar and a template for producing a fly. A positioning needle is inserted into a sponge, preliminary fixation can be performed, the operation is simple, batch production is suitable, when sewing, a roller moves along the collar guide rail, the sewing work is not only more light and easy, but also directional sewing can be performed according to the track of the collar guide rail, and the situation of deviation in the sewing process is avoided.

The utility model discloses a positioning device for steel rail turnout base plate welding, and relates to the technical field of rail accessory machining. The device comprises a positioning table, a notch is formed in the positioning table, a conveying mechanism is arranged in the notch, and a positioning mechanism is arranged at one end of the positioning table; the conveying mechanism comprises a plurality of placing plates, placing grooves are formed in the upper surfaces of the placing plates, and rotating rods are rotationally mounted at the two ends of each groove opening; through the arranged conveying mechanism, the to-be-welded rail base plates in batches are conveyed one by one, the rail base plates and welding parts in batches are conveyed to the welding station of the welding robot one by one, and the welding robot conducts welding operation on the rail base plates and the welding parts in batches; therefore, one-by-one conveying of batch track base plates and welding parts is conveniently achieved, and then the welding operation efficiency of the track base plates and the welding parts is effectively improved.

The utility model discloses a steel bar spacing detection device for building construction supervision, and relates to the technical field of steel bar spacing detection, the steel bar spacing detection device comprises a measuring tape assembly composed of a measuring tape shell, a measuring tape belt, a belt hook and a connecting seat, and an anti-deviation auxiliary assembly, the anti-deviation auxiliary assembly is matched with the belt hook to realize steel bar spacing detection; the anti-deviation auxiliary assembly comprises a convex block, a connecting pin and a concave check block. The convex block is rotationally connected with the connecting seat through the connecting pin; the concave stop block is fixed to the bottom of the convex block, the concave stop block is connected to the outer side of the measuring tape in a sleeving mode in the downward state and protrudes to the position below the measuring tape, and the concave stop block and the tape hook are attached to the outer sides of the two steel bars correspondingly so that the distance between the steel bars can be detected. According to the utility model, the anti-deviation auxiliary assembly is arranged, and the tape hook and the concave baffle block are respectively attached to the outer sides of the two steel bars, so that the deviation of the measuring tape can be effectively avoided, and the detection precision is effectively improved.

The utility model discloses a winding device for OCA (optical clear adhesive) production, which structurally comprises a dust removal box, an alignment frame, a base plate and a fixing plate, an electric push rod is used for pushing a lifting plate to enable an air ejector pipe at the lower end to be close to the OCA, so that the surface of the OCA is cleaned in the pulling process, and the OCA is completely removed. Dust on the surface of the OCA optical cement is blown under the action of a suction fan and a fan and is sucked into a filter bag through a suction pipe to be collected, the influence of the dust on the OCA optical cement is avoided, limiting columns can move on the two sides under the action of a twisting nut, the two sides of the OCA optical cement are limited by the limiting columns, and the OCA optical cement is prevented from being damaged. The situation that the OCA optical cement deviates towards the two sides in the winding process is avoided, so that wrinkles in the winding process are reduced, the product quality is better, the winding roller rotates under the action of the second motor so as to wind the OCA optical cement, manual winding is avoided, and the winding efficiency is improved.

The utility model relates to the technical field of machine manufacturing, and particularly discloses an automatic feeding device for machine manufacturing, which comprises a supporting mechanism, a feeding mechanism assembled on the top of the supporting mechanism, and a limiting mechanism assembled on the supporting mechanism, the supporting mechanism comprises a supporting frame, a roller is rotationally installed in the supporting frame, a fixing frame is fixedly installed at the top of the supporting frame, a stamping cutter is connected to the bottom of the fixing frame through a hydraulic push rod, and a cutting base corresponding to the stamping cutter is fixedly installed on one side of the supporting frame; a positioning frame corresponding to the cutting base is installed at the bottom of the supporting frame in a sliding mode. The feeding mechanism comprises a shaft frame fixedly installed on the top of the supporting frame. According to the automatic feeding device, steel can be automatically and continuously fed, a precise and complex electric control system is not needed, the situation of faults is effectively reduced, and the trouble of frequent overhaul and maintenance is reduced.

This invention relates to the field of silicon carbide wafer polishing technology, and discloses a silicon carbide wafer polishing apparatus and method, including a control cabinet. A transparent glass panel is fixedly connected to the surface of the control cabinet, and a cabinet door is hinged to the surface of the control cabinet. A drain valve is connected to the lower surface of the control cabinet, and a fixing component is installed inside the control cabinet. The fixing component includes a precision cylinder, the top of which is fixedly connected to the inner wall of the control cabinet, and a fixing ring is fixedly connected to the lower surface of the precision cylinder. The invention utilizes an electric actuator to push a protective frame upwards. As the protective frame moves, it pushes the polishing ring upwards, providing sufficient space between the polishing ring and the polishing disc for the operator to load and unload the silicon carbide wafer. The operator can then install the silicon carbide wafer inside the fixing component, using the fixing component to secure the silicon carbide wafer and improving the convenience of loading and unloading the silicon carbide wafer.

The utility model discloses a Mylar film cutting device which comprises a supporting table, a limiting assembly is arranged on the inner side of the supporting table, a cutting assembly is arranged at the upper end of the supporting table, a fixed blocking frame is unlocked by unscrewing a locking screw, and therefore the cutting width of two sets of cutting knives can be adjusted in a matched mode according to the cutting requirement. When a fixed screw rod is unscrewed and disassembled, a limiting cover can be disassembled and taken down, and at the moment, an electric telescopic rod is controlled to drive a bearing seat to descend, so that a cutting knife can be moved backwards, disassembled and replaced, and first limiting baffle rings are symmetrically arranged on the front side and the rear side of the annular side face of a feeding limiting roller in a sleeving mode; according to the Mylar film cutting machine, the feeding limiting roller is symmetrically sleeved with the first limiting baffle rings, so that the feeding limiting roller can limit and guide an uncut Mylar film, the front side and the rear side of the annular side face of the discharging limiting roller are symmetrically sleeved with the second limiting baffle rings, the discharging limiting roller can limit and guide the cut Mylar film, and therefore the phenomenon that the Mylar film deviates in the cutting process is avoided; therefore, the cutting precision of the mylar film is ensured.

The utility model relates to paper box production technical field, concretely is a paper box die -cut indentation mechanism for paper box packaging, include: main part, including work head, the surface swing joint of work head has support frame, the surface swing joint of support frame has die -cut machine body and indentation machine body, the surface mounting of work head has paperboard, limiting mechanism, including limiting piece. The utility model discloses through installing limiting piece on the surface of work head makes it be located at the four ends of paperboard, can make multiple paperboard in the processing of in turn can always be placed in the area formed by four limiting pieces, further make the position of paperboard placed each time get the limiting determination, to avoid the deviation of paperboard leads to the deviation of die -cut machine body and indentation machine body in the position of paperboard surface processing produces the deviation situation, and under the connection of fixed link and connecting rod, can make limiting piece can move adjustment along the direction of connecting groove and first sliding slot according to the size of paperboard.

The utility model discloses a detachable predatory mite overwintering habitat device, including the protection box, still including the fixed plate and humidification subassembly, the fixed plate is fixedly connected with the protection box inner wall, is provided with the habitat box on the fixed plate upper end, is provided with the second groove in the fixed plate upper end, the inner wall sliding of second groove is provided with the sliding block, and the first spring is fixedly connected between the sliding block and the inner wall of second groove, the buckle is fixedly connected with the sliding block upper end, is provided with the clamping groove in the habitat box lower end edge, and the humidification subassembly is arranged on the protection box upper end. The utility model discloses through the buckle of pushing habitat box and drives the sliding block to move to the inside, makes the buckle of both sides all to enter the inside of clamping groove, then through the press down habitat box of afterwards and makes the buckle with clamping groove complete adaptation, makes the buckle with clamping groove closely under the action of first spring, avoids the habitat box and appears the situation of deviation, through the press of the convex of sliding block upper end can with habitat box disassembly, thereby can conveniently maintain and adjust habitat box, improves the overwintering survival rate of predatory mite.

The utility model discloses a mine explosion -proof bottom -raising machine based on three -arm, relates to mine explosion -proof bottom -raising machine technical field, including removing the obstacle subassembly, removing the obstacle subassembly includes base, and one side of base is equipped with the connecting frame, and the connecting frame bottom is equipped with the hydraulic cylinder, and the hydraulic cylinder bottom is equipped with the mounting seat, and the mounting seat one side outer wall is equipped with the adjusting motor. The utility model discloses through removing the obstacle subassembly can adjust the height and angle of the shovel, and the movement of the cooperation device when adjusting to the appropriate angle control shovel and ground contact can carry out efficient cleaning to the obstacle on the moving path such as gravel etc., can avoid having the obstacle to influence the normal movement of the device, guarantee the normal use of the device, when cleaning the obstacle, through the spring can play the role of buffering, avoid the damage of shovel, when the shovel moves the buffer through the deformation of spring, through the guide rod sliding in the guide hole of adjusting frame can limit the moving track, avoid the situation of the deviation of shovel.

The utility model discloses a badminton winding mechanism relates to badminton processing technical field, including work table, the surface installation of work table has rotary component, and the surface of rotary component is provided with the placing cavity at equal intervals, and the surface installation of placing cavity has rotary component, and the inboard of rotary component is provided with adjusting component, the utility model discloses the inboard of rotary component is provided with adjusting component, and the telescopic difference of up -and -down electric push rod is passed, if the feather piece upper edge radian is big then shortens the electric push rod above, and lengthens the electric push rod below, makes the bending track of adjusting board and feather contour complete adhesion, realizes the preliminary fixation to feather, avoids the feather piece and appears the deviation because of the rotation centrifugal force or feather line tension in subsequent winding, ensures that feather whole is in the symmetrical and stable fixed state, provides the even operation reference for winding assembly, avoids the deviation situation in the process of winding, and then can improve the work efficiency of device to feather winding to a certain extent.

The utility model provides a kind of wafer level packaging chip extraction flip position setting equipment, it is related to chip processing field;Including workbench, the top end sliding connection of workbench has sliding seat, and the top end fixed mounting of sliding seat has fixed block, the inside of fixed block is provided with adjusting mechanism;The adjusting mechanism includes sleeve, the axial outer wall of sleeve is fixedly installed in sliding seat, and the inside of sleeve is penetrated with the bar that penetrates, and one end of the bar that penetrates is fixedly installed with flip motor.The utility model cooperates through flip motor, first air cylinder, driving motor, threaded rod, sliding block and second air cylinder, can automatically extract, flip and position setting to chip, fixed by the form of negative pressure formed by micro vacuum pump suction simultaneously, avoid to cause damage to chip outer wall by using clamp fixed, to cause waste condition, and cooperate coil and core, can let first air cylinder displacement reserve second air cylinder stroke space.

The utility model discloses a kind of wind pipe plate composite use roll press type gluing device, it is related to wind pipe plate processing technical field, including rack, the top of the rack is fixed with support plate, the top of the support plate is fixed with mounting bracket, the inner wall of the mounting bracket is rotatably connected with rotating rod, and one end of the rotating rod is installed with unwinding roller, the utility model has beneficial effect for: rack is as basic support structure, and it provides stable mounting platform for entire device, support plate is fixed in the top of rack, and mounting bracket and rotating rod, unwinding roller and the like components are installed on it, so that the unwinding operation of core plate can be orderly carried out, core plate is wound on unwinding roller, subsequent processing procedure is facilitated, the setting of three groups of first limiting roller can play good guiding and limiting effect to core plate, ensure that core plate keeps stable path during conveying process, avoid the situation of deviation, provide good prerequisite for subsequent gluing and composite procedure.

The utility model discloses a general type switch track of window cleaning machine, including a plurality of bottom blocks, the upper end of a plurality of cooperation's bottom block at front and back two sides is fixedly connected with first track, the upper end of a plurality of cooperation's bottom block at left side is fixedly connected with second track, the rear side of two first track at front side is rotatably connected with first swing leg, the upper end of one bottom block in the middle is rotatably connected with second swing leg, and is equipped with first arc track between first swing leg and second swing leg. The utility model discloses the flexible structure design of switch track, breaks the limitation of straight rail fixed trend, makes window cleaning machine can adjust operating track according to building facade form, and can assemble bottom block with first track or second track, can avoid the emergence of the situation that first track or second track deviates and leads to the stable operation of window cleaning machine.

The utility model discloses a cap CNC machining jig, and relates to the field of cap CNC machining, the cap CNC machining jig comprises a fixing plate, a rotating assembly and a suspender, the bottom of the fixing plate is fixedly connected with a supporting column, the inner side of the fixing plate is provided with a supporting plate, the rotating assembly is arranged on the side face of the supporting plate, and the suspender is arranged on the rotating assembly. And the rotating assembly comprises a fixing frame, a servo motor, a rotating rod, a first gear and a second gear, and the hanging rods are welded to the four sides of the bottom of the supporting plate. According to the cap CNC machining jig, by arranging the rotating assembly and the limiting assembly, in the using process of CNC machining treatment on a cap through the machining jig, rotating treatment on a workpiece is achieved, subsequent machining treatment on different positions of the workpiece is facilitated, the machining jig is more efficient, meanwhile, the workpiece is limited and clamped, and the machining efficiency is improved. And the condition of deviation during subsequent workpiece machining is avoided, it is guaranteed that the machining jig conducts machining treatment on the caps smoothly, and workers can use the machining jig conveniently.

The utility model relates to the technical field of corrugated paper production equipment, and discloses a body paper reel transporting and replacing device which comprises a cross beam, a longitudinal beam, a paper inserting assembly, a first movable frame, an X-axis driving mechanism, a transmission rod, a gear and a rack. First movable frames movably connected with a cross beam are fixed to the two ends of a longitudinal beam, and an X-axis driving mechanism composed of a first cylinder body and a first telescopic rod is arranged on one first movable frame, so that the first telescopic rod with the outer end fixedly connected with the cross beam can stretch out and draw back; and the first cylinder body fixed on the first movable frame moves relative to the first telescopic rod, so that the first movable frame and the longitudinal beam connected with the first movable frame are driven to move in the length direction (namely the X-axis direction) of the cross beam, and body paper reels are conveyed. Compared with an existing automatic body paper reel conveying device, the automatic body paper reel conveying device has the advantages that two X-axis driving mechanisms do not need to be arranged while reliable operation of the device is guaranteed, and the investment cost and the maintenance cost of the device are low.

This utility model provides an inner formwork for bridge piers, comprising: an inner formwork assembly with a fixing plate fixedly connected to its inner wall; an anti-deviation assembly installed at the bottom of the inner formwork assembly for preventing deviation between adjacent assembled inner formwork assemblies; a support mechanism installed inside the inner formwork assembly to enhance its support strength, with a clamping mechanism installed at its top; and a base plate fixedly connected to the bottom of the support mechanism. The clamping mechanism connects the support assembly and the inner formwork assembly, facilitating subsequent removal of the inner formwork assembly by lifting it with a hook. After removal, the locking assembly can be disassembled to easily separate the support mechanism from the fixing plate, improving efficiency.

The utility model discloses a bridge for building electrical construction, which comprises a bridge body arranged between two expansion screws, a support plate is fastened at the bottoms of the expansion screws, the top of the support plate is in contact with the bottom of the bridge body, vertical plates are fixedly connected to the front and rear positions of an inner cavity of the support plate, and the vertical plates are fixedly connected to the bottom of the bridge body. An inner cavity of the vertical plate is fixedly connected with a bearing seat in an embedded mode, and the inner surface of the bearing seat is rotationally connected with an inner threaded cylinder. The bottom of a bridge body is supported and placed through a supporting plate, an inner threaded cylinder is rotated, the inner threaded cylinder rotates on the inner surface of a bearing seat, and under rotation, a sliding plate is guided and limited on the inner surface of a sliding groove, so that a threaded rod is driven to move, and meanwhile, the sliding plate drives a connecting plate to move; and then a connecting plate is driven to slide in a through groove and a vertical limiting plate is driven to move, so that the side surface of the bridge body is limited, the stability of mounting and supporting is improved, and the condition of deviation during mounting is avoided.

The utility model discloses a split type optical lens, which comprises a lens cone and a mounting tube, the lens cone is sleeved and fixed inside the mounting tube, the top side of the lens cone is connected with a lens end cover, the outer side of the mounting tube is connected with a locking structure, the inside of the locking structure is connected with a threaded connection tube, and the threaded connection tube is connected with the lens end cover. The lens end cover can be assembled and disassembled in a plug-in manner, so that unsmooth disassembly of the lens end cover caused by thread damage due to use of a threaded connection structure is avoided, the situation of accidental contact abrasion of the optical lens due to repeated screwing of the lens end cover is avoided, and the lens end cover can be assembled and disassembled while the mounting pipe and the threaded connection pipe are connected and assembled. The assembly stability of the lens cone in the mounting tube is further improved, and the condition that the lens cone rotates to cause the deviation of an internal optical lens is avoided.

The utility model discloses a kind of concrete rib superimposed boards, belong to superimposed board technical field;Including prefabricated bottom plate, the inside of the prefabricated bottom plate is provided with bottom plate reinforcement, the top of the prefabricated bottom plate is provided with longitudinal reinforcing rib and transverse reinforcing rib, the longitudinal reinforcing rib and transverse reinforcing rib are mutually crossed and set, the inside of the prefabricated bottom plate is provided with connecting piece, the connecting piece is through prefabricated bottom plate and cast-in-place concrete layer, and the end portion of connecting piece is bent and forms anchoring structure.The utility model is combined by prefabrication and cast-in-place, cooperates the reinforcement of connecting piece, avoids the situation that prefabricated layer and cast-in-place layer will not be offset, simultaneously the mortise and tenon groove can be docked, then through pouring reinforcement, and then make the integrity of prefabricated bottom plate after installation better, to make the installation effect of superimposed board better.

The utility model relates to the technical field of couplings, in particular to a motor driving assembly of a grinding machine, which comprises a motor output shaft, a motor connecting flange arranged at the top end of the motor output shaft, two first fixing pieces fixedly connected to the lower end of the motor connecting flange, and a grinding block connecting disc arranged below the motor connecting flange. The upper end of the grinding block connecting disc is fixedly connected with a grinding disc connecting disc, the upper end of the grinding disc connecting disc is fixedly connected with a second fixing piece, a coupler is arranged between the first fixing piece and the second fixing piece, and the top end of the first fixing piece and the top end of the second fixing piece are both in threaded connection with bolts. And the first fixing piece and the second fixing piece are still tightly connected with the coupler, so that the situation of connection deviation is avoided, and the stability of power transmission is ensured.

This utility model relates to the field of aluminum plate processing technology, and in particular to an aluminum plate processing aluminum mold clamping device, comprising: a processing table, a placement plate fixedly connected to the upper side of the processing table, four support rods fixedly connected to the upper side of the processing table, and a top plate fixedly connected to the upper side of the four support rods; a movable structure is installed on the processing table, the movable structure including a control motor fixedly installed on the side wall of the processing table, and a bidirectional screw fixedly installed at the output end of the control motor. This utility model enables two sliders to move simultaneously through the movable structure, thereby ensuring that the aluminum plate remains in the center position. The clamping structure allows the aluminum plate to be directly clamped by a trigger plate, and the positioning and clamping structure avoids direct contact and clamping of the aluminum plate.

The utility model relates to heavy crossbeam formula goods shelf technical field, concretely for a kind of heavy crossbeam formula goods shelf for automated warehousing, including stand, the surface of stand is placed with crosspiece, the upper surface of crosspiece is placed with tray, the lower surface of crosspiece is provided with stabilizing device, stabilizing device includes guide slot, guide slot is opened in the inboard of crosspiece, the inside sliding connection of guide slot has slider, the side fixed connection of slider has connecting strip, connecting strip is slidably connected with the inside of crosspiece, the lower surface fixed connection of connecting strip has push sleeve, the upper surface fixed connection of connecting strip has plug-in block, the lower surface of tray is opened with storage groove, plug-in block is inserted with the inside of storage groove, the inboard of crosspiece is provided with driving assembly.The utility model, by setting stabilizing device, can effectively stabilize tray, avoid the situation that tray will deviate because of inertia, and then reduce the problem that tray will drive goods and stand collide.

The utility model discloses a kind of boiler explosion-proof devices, it is related to boiler explosion-proof technical field, including boiler body, still including mounting mechanism and pressure relief mechanism, the mounting mechanism includes cooling pipe, the fixed sleeve board is installed in cooling pipe bottom, multiple clamping plates are equidistantly arranged in the fixed sleeve board bottom, connecting bolt is arranged between the clamping plate and the top of fixed sleeve board, the pressure relief mechanism includes two traction springs, two the traction spring is respectively arranged in the inner wall of cooling pipe both ends, two the traction spring bottom is equipped with pressure relief plate. The utility model is through connecting bolt and is connected with the fixed sleeve board inner wall screw connection by penetrating clamping plate and flue, so that mounting mechanism can be connected with flue stably, the pressure in boiler can be discharged from the gap between the pressure relief plate and cooling pipe, simultaneously by traction spring and damper, so that pressure relief plate can be reset stably, can repeatedly play the role of boiler explosion-proof.

The utility model discloses a four-pole R-head pin for transmitting audio signals, which relates to the technical field of four-pole plugs for transmitting audio signals and comprises a pin body and a connecting mechanism arranged at one end of the pin body, the pin body comprises an R-head pin, one end of the R-head pin is provided with a connector, and the other end of the R-head pin is provided with a spring. The outer side of the connector is sleeved with a sealing sleeve, the top of the outer wall of the sealing sleeve is provided with a clamping plate, the connecting mechanism comprises a connecting base movably arranged on the outer side of the sealing sleeve in a sleeving mode, one end of the connecting base is provided with an audio transmission line connected with audio playing equipment, and the top of the inner wall of the connecting base is provided with a clamping groove movably connected with the clamping plate. According to the utility model, the R-head pin can be connected with the audio transmission line through the connection between the sealing sleeve and the connecting seat, and the installation of the R-head pin is more stable through the connection between the clamping plate and the clamping groove, so that the R-head pin can be conveniently installed and replaced by a worker.