27results about How to "Prevent fallback" patented technology

This application relates to a pin bending device for electrical connectors, belonging to the field of pin bending technology. The device includes a base, a feeding mechanism, an assembly mechanism, and a bending mechanism. The feeding mechanism includes a housing conveying assembly and a pin conveying assembly. The housing conveying assembly is located at one end of the base along its length, and the pin conveying assembly is located on the base. The housing conveying assembly can convey the housing, and the pin conveying assembly can convey the pin. The assembly mechanism is located on the base and on one side of the housing conveying assembly along its length. The assembly mechanism can receive the housing and the pin and assemble and fix them to form a terminal. The bending mechanism is located on the base and can perform two bends on the pin. This application aims to solve the problem of low production efficiency caused by the difficulty in simultaneously achieving automated assembly and bending.

The radial flexible mechanism of the scroll compressor comprises a main shaft, a crankshaft seat is arranged at the output end of the main shaft, an eccentric hole is axially formed in the end portion of the end, away from the main shaft, of the crankshaft seat, and a crank pin is fixedly connected into the eccentric hole. The outer side of the end, away from the crankshaft seat, of the crank pin is fixedly sleeved with an eccentric shaft sleeve, one side of the eccentric shaft sleeve is fixedly connected with an eccentric block, a limiting groove is formed in the outer side of the end, close to the eccentric block, of the crankshaft seat, and an elastic washer is arranged on the inner side of the limiting groove. The groove is formed in the outer side of the crankshaft seat on the main shaft, and the rubber ring is fixed on the crankshaft, so that the collision between the eccentric block and the crankshaft is avoided, and the NVH (Noise Vibration and Harshness) performance is favorably improved; due to the fact that the rubber ring is additionally arranged, the self-aligning function has a buffering function, too intense self-aligning and rollback are avoided, and the movable disc of the compressor is more stable in operation, low in noise and good in NVH expression homogeneity.

The utility model provides a kind of glass material camouflage net traction structure, the utility model relates to camouflage equipment technical field, it includes main component, main component contains type piece, multiple pivot and pinion;Second pivot is rotatably connected with winding wheel, and main component side is connected with traction assembly by traction line.This utility model realizes the convenient traction of glass material camouflage net by the cooperation of main component, winding wheel, traction assembly and locking assembly, and it is labor-saving to operate;Winding wheel ensures that traction line is orderly received and released, and traction is stable;Locking assembly prevents traction line from backtracking, improves use safety and reliability, and has higher practical value.

The utility model provides an experimental animal grabbing device. The experimental animal grabbing device comprises a box body with an inner cavity, a guide pipe arranged in the inner cavity, a first clamping assembly arranged at the tail end of the guide pipe, a second clamping assembly connected to the bottom of the box body in a sliding mode, and a first driving part for driving the second clamping assembly to slide. The first clamping assembly is used for clamping the head of an experimental sample, and a sensor for monitoring the experimental sample is arranged at the tail of the guide tube. A storage assembly is further arranged in the box body, a rubber sleeve is arranged in the storage assembly, a sleeving assembly for driving the rubber sleeve to move to the head of the experimental sample is arranged in the box body, and an elastic connecting piece connected with the rubber sleeve is arranged at the top of the box body. A first linear module is arranged at the top of the box body and drives the sleeving assembly to slide in the length direction of the box body. The second clamping assembly is used for clamping the body of the experimental sample. According to the animal experiment sample grabbing device, one-time grabbing is firm, animal samples are prevented from being damaged, the effectiveness of animal experiment sample grabbing is guaranteed, and the personal safety of operators is effectively protected.

This utility model discloses a workpiece machining fixture, including a tooling, a steering knuckle workpiece placed on top of the tooling, a connecting block fixedly connected to the front of the tooling, and jaws movably connected to both sides of the connecting block via pins. The jaws extend from the side away from the connecting block to the top of the steering knuckle workpiece and contact its surface. An adjustment structure is provided at the bottom of the tooling, which controls the movement of the jaws and clamps the steering knuckle workpiece. The adjustment structure includes a connecting frame fixedly connected to the bottom of the tooling, a screw movably connected inside the connecting frame via bearings, and a threaded sleeve threaded to the surface of the screw. Push rods are fixedly connected to both sides of the threaded sleeve. This utility model achieves the rotational clamping action of the jaws through the pin connection between the connecting block and the jaws, forming a radial constraint force. The mechanical linkage of the adjustment structure replaces direct bolt locking, preventing the threaded pair from loosening due to vibration.

This application discloses a direct-drive bridge-type five-axis machining center, relating to the field of CNC machine tools. It includes a base and a worktable. Two support seats are mounted on the base. A first material cavity is formed at the end of the base away from the support seats, and a second material cavity is formed between the base and the support seats. A transverse slide is slidably connected to the support seats. Each support seat has a transverse positioning seat, with transverse stators mounted on both sides of the transverse positioning seat. Transverse movers are mounted on both sides of the transverse slide. A longitudinal slide is slidably connected to the transverse slide, with a longitudinal fixed seat mounted on it. Two rows of longitudinal stators are mounted on both sides of the longitudinal fixed seat. Two rows of longitudinal movers are mounted at the bottom of the longitudinal slide. A vertical slide is slidably connected to the longitudinal slide, with a vertical stator mounted on one side of the longitudinal slide and a vertical mover mounted on the vertical slide. This application aims to provide a sufficiently large operating space, facilitate workpiece loading and unloading, and improve the overall operating efficiency of the machining center.

This invention relates to the field of integrated structural and functional design of aero-engines, and discloses a compressor rectifier blade angle adjustment structure and method based on piezoelectric materials. The method utilizes the extension, contraction, or bending deformation of a first and second active pawl to drive the rectifier blade, equipped with ratchet wheels, to rotate to the desired angle. Furthermore, each rectifier blade is designed with two ratchet wheels, which work together to allow the blade to freely rotate in both directions. The first and second anti-return pawls effectively prevent reverse rotation and backtracking during rectifier blade angle adjustment. This invention transforms the reciprocating motion of the first and second active pawls into intermittent rotation of the rectifier blade along a certain direction, moving step by step and accumulating the rotation angle. This allows the rectifier blade angle adjustment range to reach 360°, and the adjustment accuracy can be adjusted by modifying the number of ratchet teeth as needed. This adjustment structure is superior to traditional adjustment structures, and the adjustment method has the advantage of high positioning accuracy.

The utility model provides a kind of high-pressure cleaning machine gun head, comprising: hand-held handle, hand-held handle is provided with holding cavity, hand-held handle is provided with flow-through cavity in, and the water inlet and water outlet being communicated with flow-through cavity;Hand-held handle includes switch piece, switch piece is movably set in holding cavity relative to hand-held handle, switch piece is used to control the flow of water flow in flow-through cavity in hand-held handle;Driving assembly, at least part of driving assembly is abutted with switch piece, driving assembly is used to drive switch piece movement, by the abutment cooperation of driving assembly and switch piece, realize single hand operation can continuously control water flow to flow out, to solve the technical problem of long time continuous operation in relevant technology, user needs to keep hand pinch action all the time, easily lead to hand muscle fatigue, even cause soreness or discomfort, reduce work efficiency and user experience.

The utility model discloses a pipeline fixing clamp for building construction in the field of building construction, which comprises a mounting plate serving as a main body of equipment to provide mounting positions for other parts, connecting holes and connecting mechanisms are arranged at four corners of the top of the mounting plate in a penetrating manner, and the connecting mechanisms are used for quickly connecting an upper pipe clamp and a lower pipe clamp. And the connecting mechanism comprises a mounting block, the mounting block is fixedly connected to the middles of the left side and the right side of the upper pipe clamp, and an inserting groove is formed in the top of the mounting block in a penetrating mode. And the clamping block is reset through the connecting spring, the extrusion block is blocked, and the upper pipe clamp and the lower pipe fitting are fixedly connected, so that connection through bolts is avoided, connection is simpler and more convenient, the installation speed is increased, time is saved, and the efficiency is improved.

The utility model discloses an easy-to-break cover film indentation heating forming device, including pavilion, cover film bearing roll, cover film indentation mechanism, cover film traction mechanism, on the pavilion, and between cover film indentation mechanism and cover film traction mechanism place is equipped with adjacent cover film heating mechanism, cover film forming mechanism in proper order, the cover film heating mechanism includes upper and lower heating power source and upper and lower heating plate, and the cover film forming mechanism includes forming upper die, forming lower die, forming power source and cooling plate. The utility model can carry out the double processing of indentation and stiffener forming to the bottom of the cover film for packaging, make it can keep sealed and will not leak, and also facilitate the easy-to-break state when using subsequently, be favorable to the mixing of the material that packs, effective use, has improved the blister pack quality of material.

The invention relates to the technical field of armored optical cable installation equipment, and discloses an armored optical cable clamping device and an optical cable clamping method.The armored optical cable clamping device comprises a device shell used for installing internal components, a clamping mechanism and a power block arranged on the side wall of the device shell in a sliding mode, and a first clamping plate is fixed to the outer wall of the power block; first sliding rods are symmetrically fixed to the inner walls of the upper side and the lower side in the device shell, sliding blocks are slidably arranged on the first sliding rods, and sliding plates, second moving plates, mounting plates, mounting rods, mounting plates and second clamping plates are arranged on the side walls of the sliding blocks through first supporting rods. The device is reasonable in design, the clamping mechanism can be driven to clamp and fix an armored optical cable without extra power, meanwhile, clamping and fixing of armored cables of different sizes can be better met, the applicability of the device is improved to a certain degree, and in addition, due to the arrangement of the locking mechanism, the clamping mechanism is convenient to use. Therefore, the clamping and fixing quality of the device on the armored optical cable is ensured.

An arc-extinguishing system for a switch belongs to the field of low-voltage electrical technology. It includes an arc-extinguishing chamber and a contact system. The contact system includes a moving contact and a stationary contact. After the moving contact actuates, it makes contact with or separates from the stationary contact. The arc-extinguishing chamber is located on one side of the contact system in the opening direction. The arc-extinguishing chamber includes a pair of side plates, multiple grid plates disposed between the pair of side plates, and a pair of gas-generating elements. The pair of gas-generating elements are located at the lower edge of the grid plates. The key feature is that the pair of gas-generating elements are arranged opposite each other, forming a flared opening with a larger diameter at the bottom and a smaller diameter at the top in the upward direction. The moving contact includes a long contact plate and a short contact plate, with the arc-initiating head of the long contact plate extending beyond the flared opening. Advantages: It helps the arc quickly cross the flared opening, facilitates the arc's rapid entry into the grid plates of the arc-extinguishing chamber, and effectively prevents arc retreat.

The utility model relates to the technical field of LED project lamps, in particular to a portable LED project lamp lifting mechanism which comprises a supporting frame and an adjusting assembly, the supporting frame is connected with a project lamp, the project lamp is composed of a fixed plate body, a movable plate body and a lamp body, the fixed plate body is connected to the supporting frame, the movable plate body is connected to the fixed plate body in a sliding mode, and the lamp body is connected to the movable plate body in a sliding mode. A supporting shaft rotationally connected with a bearing of the lamp body is connected to the movable plate body, the adjusting assembly is connected to the lamp body, and the adjusting assembly comprises a lifting assembly and a leveling assembly. According to the LED lamp, the height of the lamp body can be adjusted through the movement of the sliding seat on the movable plate body along the guide rod, the fixed ratchet bar and the movable ratchet bar connected to the sliding seat are matched with each other to prevent the lamp body from returning, and the lamp body can rotate through the supporting shaft to change the included angle between the lamp body and the ground; and self-locking is carried out through rotation of the cam and matching of the cam and the fixing rod, so that the lamp is kept at a certain angle, and the required lighting condition is provided.

The utility model discloses a hold-down mechanism for a sieve plate of a vibrating screen, which comprises a vibrating screen side plate, a sieve plate and a wedge block, the wedge block is of a trapezoidal structure, the hold-down mechanism further comprises a hold-down structure, and the hold-down structure comprises a mounting shaft; a mounting shaft is rotationally mounted on the vibrating screen side plate, one end of the mounting shaft extends to the inner side of the vibrating screen side plate and is provided with a main gear located above the wedge block, and the other end of the mounting shaft extends to the outer side of the vibrating screen side plate and is provided with a locking wheel and a rotating handle; a pushing rack matched with the main gear is arranged at the trapezoidal inclined face end of the wedge block, a crawler belt is rotationally arranged on the lower end face opposite to the inclined face end, and the main gear drives the wedge block to be slidably pressed on the sieve plate through the pushing rack. A one-way lock plate matched with the lock wheel and used for limiting one-way rotation of the lock wheel is elastically arranged on the outer side face of the vibrating screen side plate in an abutting mode. The locking wheel and the one-way locking plate are arranged, so that the pressing structure can be limited to drive the wedge block to move in one direction, and the wedge block can be prevented from retreating.

The application discloses a cosmetic container, comprising a front barrel, a rear barrel, a moving body and a non-return element; the relative rotation of the front barrel and the rear barrel drives the moving body to move axially, so that the cosmetic is extended or retracted in the container; the non-return element is slidably arranged in the rear barrel and can be switched between a first position and a second position; in the first position, the non-return element is disengaged from the front barrel, allowing the front barrel to rotate freely relative to the rear barrel in both directions; in the second position, the non-return element is engaged with the front barrel, allowing the front barrel to rotate relative to the rear barrel in a first direction. When the base is not connected with the rear barrel, the non-return element is in the first position, and the front barrel can rotate relative to the rear barrel in both directions, so that the moving body can be accurately adjusted to the initial position at the bottom end before filling; after the base is connected with the rear barrel, the non-return element is always kept in the second position, and the front barrel rotates relative to the rear barrel in one direction, so that the cosmetic can be stably extended and prevented from being retracted during use, and the filling adjustment requirement and practicability are considered.

A rope head positioning and rope body retreat stopping and clamping device is provided with a double-acting opening and closing cylinder, a rope head cross holding mechanism and a bevel tooth presser mechanism; the rope head cross holding mechanism and the bevel tooth presser mechanism are both composed of left and right two parts, in each part: the cross holding mechanism one end is fixedly assembled with one opening and closing jaw of the double-acting opening and closing cylinder, the middle part is provided with a through hole matched with the bevel tooth presser mechanism, the other end is provided with a group of interval arranged insertion plates, the rope head clamping grooves are arranged on the outer edges of the insertion plates; the bevel tooth presser mechanism outer side is penetrated into the cross holding mechanism through hole, a row of bevel teeth are arranged on the bevel tooth presser mechanism inner side; under the closed state of the double-acting opening and closing cylinder, the insertion plates of the left and right two parts of the cross holding mechanism are cross matched with each other, the rope head positioning and clamping hole of the rhombic structure is formed, the bevel teeth of the left and right two parts of the bevel tooth presser mechanism are mutually engaged, the rope body is clamped and fixed. The utility model satisfies the consistency requirement of the production rhythm of the hand-held paper bag or the paper box, and improves the production efficiency.

The utility model discloses a kind of powder double feeding devices.Wherein, including: rack, the upper cover of the rack is equipped with sealing cover, the lower end of the rack is fixed with discharge hopper, the one end of the sealing cover is equipped with the vacuum feeding machine of discharge hopper intercommunication;The discharge platform of the rack is provided along its length direction extension, the orthographic projection area of the sealing cover covers part discharge platform, and the discharge platform one end is connected with discharge hopper, the one end of the sealing cover is formed with the inlet for exposing discharge platform;It further includes the push plate that can move forward and backward, the one end of the push plate is equipped with the drive device that makes it action;By moving push plate, material is pushed into discharge hopper;Realized double mode feeding function.When vacuum feeding machine normal work, system can automatically complete powder delivery;When vacuum feeding machine fails, material can be manually or semi-automatically pushed into discharge hopper by push plate, as standby feeding mode.

The utility model discloses a cement pipe joint, which belongs to the technical field of cement pipe connection, realizes the butt joint precision of a main joint and an auxiliary joint and reduces manual adjustment through the physical guide of a guide strip and a guide groove and the forced limit of an angle calibration block and an angle calibration groove. The self-adaptive sealing ring in the annular sealing cavity forms dynamic pressure compensation to ensure no leakage; the main joint and the auxiliary joint are quickly assembled through the thread part I and the thread part II to meet the requirements of different pipe diameters, so that the inventory cost is reduced; through the design of a circular mounting cylinder and a fastening screw rod, the cement pipe body can be fixed by the joint body, and the connection stability is guaranteed; according to the cement pipe joint, the problem that a traditional cement pipe joint is poor in sealing performance can be solved, tight and reliable sealing connection between cement pipes is achieved, the durability of a pipeline system is improved, and the cement pipe joint has the advantages that the problem that the traditional cement pipe joint is poor in sealing performance is solved, tight and reliable sealing connection between cement pipes is achieved, and the durability of the pipeline system is improved.

The utility model relates to electrical equipment monitoring technical field especially, it relates to a kind of intelligent platen monitoring device, the utility model sets base, knob, tablet and intelligent monitoring component, tablet one end fixed sleeve connects second knob, the other end is set to and the arc-shaped recess of first knob clasp, the middle part of tablet is set to the fixed clamp for fixing magnet, several wave teeth groups are set in arc-shaped recess, wave tooth group close to the surface of the bottom of recess and arc-shaped recess are provided with buffer pad, pressure sensor for monitoring pressure fluctuation of buffer pad is embedded in buffer pad, intelligent monitoring component includes clamping seat, the hollow iron sheet of lead wire, and the spring between the clamping seat side wall and hollow iron sheet, clamping seat two sides are symmetrically provided with through hole, output terminal for connecting monitoring console is set in through hole, and further, the aging degree of platen structure is monitored in time during operation, and the reliability of platen investment and withdrawal monitoring is improved.

The application discloses a kind of NPU-oriented multi-edition banknote crown code number identification method and system, for the crown code number identification in multi-edition, multi-pose and complex imaging condition banknote image, specifically includes the following steps: data annotation and pre-processing stage;Model training stage;NPU adaptation and model quantization stage.For the crown code number of Arab currency and the like in size and position variation, character adhesion / connected pen and background reflection, anti-counterfeiting underlay interference and the like, the traditional template two-stage OCR is prone to miss detection, false detection and sequence disorder, a template-independent end-to-end recognition method is proposed, which completes the robust positioning and sequence correct identification of crown code number in a single process, significantly reduces false positives and wrong sequence, and uses NPU to accelerate to meet the real-time and stability requirements of embedded and edge.

The invention is suitable for the technical field of spring detection, and provides a belleville spring overpressure detection device which comprises a detection frame. The detection frame comprises a fixing ring; a rotating disc is rotationally arranged on the inner wall of the fixing ring; a plurality of bearing parts are uniformly and fixedly mounted on the surface of the rotating disc; a C-shaped conical table is fixed to the top of the supporting plate. A lifting part in sliding fit with each two adjacent lug plates is arranged on the outer wall of the detection table in a sliding manner; a rotating part coaxial with the detection table is rotationally arranged on the detection table; according to the device, the plurality of bearing parts are driven by the rotating disc to circularly work, so that continuous and multi-station detection is realized, and the batch detection time is greatly shortened; and a mechanical self-locking structure in which the pawl is matched with the ratchet is adopted, so that the pressure is stable and not relaxed in the pressure maintaining stage, the lifting part is automatically locked in the pressure maintaining stage, the pressure is prevented from returning, and the accuracy of detection data is ensured.

This invention provides a locking structure and an aircraft. The locking structure includes a locking pin and a locking seat. The locking pin includes a support member and a limiting member fixedly connected to the support member. The locking seat includes a through groove. The first dimension of the first end of the through groove is larger than the first dimension of the limiting member, and the first dimension of the second end of the through groove is larger than or equal to the first dimension of the support member and smaller than the first dimension of the limiting member. The aircraft provided by this invention includes an aircraft body, a cargo compartment, and at least two of the above-mentioned locking structures. The cargo compartment is detachably connected to the aircraft body through the locking structures. The locking structure and aircraft provided by this invention achieve locking through a large-area surface contact between the locking pin and the locking seat, rather than the line contact or point contact locking of bolts. This greatly reduces the load on the contact surface, avoids crushing, fretting wear, and fatigue cracks caused by stress concentration, significantly extends the service life, and improves the reliability of the connection between the aircraft and the cargo compartment.

The present application belongs to the technical field of forest fruit harvesting, and particularly relates to a tree-climbing vibration harvesting robot with a multifunctional arc-shaped plate and a use method, comprising a plurality of arc-shaped rack units, a plurality of arc-shaped rack units are enclosed into a circular rack, a self-adaptive positioning wheel mechanism, a climbing mechanism, a vibration mechanism and a power supply are fixedly installed on the arc-shaped rack unit, the vibration mechanism comprises a self-locking push-pull electromagnet, a vibration excitation unit, an arc-shaped plate and an anti-reverse thrust mechanism, through the synergistic effect of the self-locking push-pull electromagnet and the vibration excitation unit, the single arc-shaped plate integrates three functions of clamping, vibration excitation and power-off protection, the arc-shaped plate is retracted during climbing, the arc-shaped plate is pushed out to clamp the trunk and transmit vibration during harvesting, and the arc-shaped plate is pushed out to lock the trunk by the resetting force of the self-locking electromagnet in case of accidental power-off, safety protection is realized, and independent clamping hands, vibration exciters and anti-falling devices do not need to be respectively arranged, so that function multiplication is realized with extremely simple hardware.

The utility model relates to hose cutting device technical field, especially a kind of hose cutting device;Including: base;Linear motor, fixedly connected on base;Moving frame, slidingly connected on base, with the control end of linear motor is fixed, by linear motor drive moves back and forth;Pad shaft, fixedly connected in the middle part of moving frame, for supporting the hose to be cut;Collecting box, fixedly connected on base, located the below of pad shaft, it is equipped with stripping arm on it, the stripping arm is close to pad shaft, for limiting hose position.The utility model realizes automatic feeding by material shifting roller and second motor, realizes accurate cutting by the operation data of material shifting roller, and realizes automatic unloading by the collaborative action between pad shaft, moving frame and the stripping arm of collecting box, to effectively solve the problem of poor cutting consistency, complicated manual operation and low efficiency in prior art, so as to improve the production efficiency and product quality of hose cutting.

This invention discloses a downhole insertion-type long-lasting isolating production combination tool, relating to the field of long-lasting isolator technology. It includes a central tube, with a fixing block fixed at an equal angle on the outer side of the upper end of the central tube. The fixing block is fixed to a connector, and a sealing mechanism for sealing the production pipe is slidably connected to the inner side of the connector. This downhole insertion-type long-lasting isolating production combination tool employs a cleaning mechanism that converts axial gravity into rotational torque through a combination of spirally distributed rollers. When the tool is lowered, the arc-shaped panel adheres tightly to the pipe wall under the thrust of the airbag. The friction between the spiral rollers (30°-60° rise angle) and the pipe wall generates a tangential component force that causes the entire rotating assembly (ring, arc-shaped panel, scraper) to rotate around the central tube. The scraper rotates accordingly, scraping away the circumferential attachments. This process continues throughout the entire lowering stroke, achieving a pretreatment effect on the well wall of the sealing section, significantly improving the contact quality and working life of the subsequent sealing sleeve and metal slips.

This invention discloses a hydraulic clamp with a mechanical self-locking structure and its design method, comprising: a hydraulic cylinder and a hydraulic cylinder piston rod slidably disposed within the hydraulic cylinder; a self-locking assembly is disposed on the hydraulic cylinder, the self-locking assembly including a wedge-shaped locking pin, a push rod, a push-pull locking rod, and a wedge-shaped locking block; one end of the push-pull locking rod is axially connected to the push rod, and the other end is axially connected to the hydraulic cylinder piston rod; the wedge-shaped locking pin is disposed on the outer wall of the push-pull locking rod, the wedge-shaped locking block is sleeved on the outer side of the push rod, and the inner wall of the wedge-shaped locking block is provided with a wedge-shaped groove, the wedge-shaped groove being adapted to the shape of the wedge-shaped locking pin; the wedge-shaped locking pin extends from the push-pull locking rod to the wedge-shaped locking block, and the wedge-shaped locking pin is inserted into the wedge-shaped groove; when the hydraulic cylinder is cut off, the wedge-shaped locking pin and the wedge-shaped groove of the wedge-shaped locking block form a rigid engagement, the push-pull locking rod maintains the relative position of the push rod and the hydraulic cylinder piston rod, and the whole remains locked, achieving continuous clamping, eliminating the need for continuous oil supply of electricity / fuel consumption, and reducing energy costs.

The application relates to a field connector and a connecting assembly, which comprises a main body, a slide rail assembly and a side turnover cover. The slide rail assembly comprises a slide rail assembled on the main body and a wire buckle installed on the slide rail and used for fixing an optical cable on the slide rail. The side turnover cover is covered on the main body and covers the slide rail and the wire buckle. An injection glue part for injecting glue to bond and fix optical fibers of the optical cable on the slide rail assembly is arranged on the side turnover cover. The problems that link loss is too large due to factors such as poor fixing and material shrinkage in the subsequent use of the field connector in the related art are solved.