42results about How to "Reduced insertion resistance" patented technology

The invention relates to the technical field of charging sockets, and particularly discloses a charging seat, which comprises a fixed block, a socket and a dustproof cover, the main locking block is movably assembled on the socket along the radial direction of the plugging cavity; the unlocking button is movably assembled on the socket along the depth direction of the plugging cavity; the connecting rod is connected between the main locking block and the unlocking button; the labor-saving lever is mounted on the socket; the boosting block is arranged at the resistance end of the labor-saving lever and is movably assembled on the socket along the depth direction of the insertion cavity; the pushing plate is movably assembled in the insertion cavity along the depth direction of the insertion cavity; the diameter of the inserting cavity is larger than that of the charging gun head, the pushing plate is provided with a pushing inclined face used for pushing the main locking block to move out of the inserting cavity, and the main locking block is provided with a main locking face. According to the charging seat, smooth plugging and unplugging actions are realized, and the reliability of charging connection and the user experience are improved.

The anti-falling Type-c connector comprises a TYPE-C male head body, an outer metal sleeve is fixedly installed at the front end of the TYPE-C male head body, inner groove bodies are formed in the upper end and the lower end of the outer metal sleeve respectively, an anti-falling metal elastic piece is installed in each inner groove body, a fluorescent strip is arranged outside the TYPE-C male head body in a sleeving mode, and the TYPE-C male head body is provided with a plurality of anti-falling metal elastic pieces. According to the utility model, certain elastic sheet resistance can be provided when the anti-drop metal elastic sheet is pulled out, a certain anti-drop effect is achieved by increasing the pull-out resistance, the connection between the male head and the female seat is more stable, and the insertion resistance can be effectively reduced through the plurality of guide arc-shaped parts of the elastic sheet in the insertion process of the elastic sheet, so that the insertion efficiency is improved. The socket has a certain insertion guiding effect, enables the insertion work to be smoother, improves the use effect, does not need to be additionally provided with an anti-falling limiting structure, does not need to be matched with a special female seat for use, is higher in adaptability and usability, is wider in use range, and is suitable for popularization and use.

This utility model discloses a low-voltage switchgear transfer device, which relates to the field of low-voltage switchgear transfer technology. The device includes a support frame with a transfer mechanism mounted on top for transferring the low-voltage switchgear. The transfer mechanism includes a support assembly with a directional wheel fixedly mounted on the front side of the support frame. A support plate is fixedly mounted on top of the support frame. A connecting shaft is fixedly mounted on the front side of the support frame, and a connecting rod is movably mounted on the outer side of the connecting shaft. An electric push rod in the transmission assembly can drive a guide rod to move back and forth, adjusting the relative position of the baffle and the low-voltage switchgear. The baffle can rotate flexibly via a limiting shaft. When the baffle rotates to be perpendicular to the guide rod, its inclined front surface can push the low-voltage switchgear backward, causing the front side of the switchgear's bottom plate to naturally rise. Regardless of the distance between the switchgear's bottom plate and the ground, or whether the bottom plate has protruding support feet or cables, this device creates space for the support plate to insert.

The utility model provides a redundant power supply automatic switching device of a hot plug module, which relates to the technical field of power supply switching equipment, and comprises a socket assembly consisting of a socket cover and a plug assembly consisting of a plug seat and a plug block which are arranged on one side of the socket cover, the plug seat is connected with the socket cover through the plug block, and the plug block is connected with the socket cover through the plug block. Sliding holes are formed in the two ends of the plug block, a trigger rod penetrating through the plug seat is arranged in the plug seat, two connecting plates are arranged at the end, located in the plug seat, of the trigger rod, a rectangular frame is arranged between the two connecting plates, and a conductive column is arranged at the end, close to the plug block, of the rectangular frame; a plug seat of a plug assembly is connected with a socket cover through a plug block with a sliding hole, the sliding hole provides guidance for insertion, so that the plug block can stably move along a set path, during insertion, the plug block pushes a trigger rod, the trigger rod drives a connecting plate and a rectangular frame, a conductive column is in contact with a conductive structure in a socket, and power connection is achieved.

This invention provides a method for processing an ultrafine lithotripsy probe, comprising the following steps: S1. Inserting one end of the probe body into the mounting hole of the probe base to complete the initial assembly; S2. Placing the initially assembled ultrafine lithotripsy probe into a pressing device and fastening the probe body to the column of the pressing device, so that the probe base is located inside the heating coil of the heating machine; S3. Starting the heating machine to heat the probe base, and when the probe base reaches a predetermined state, using the pressing device to press the probe body into the mounting hole to a predetermined depth; S4. After pressing, removing the ultrafine lithotripsy probe and performing a cooling treatment. The ultrafine lithotripsy probe produced by this processing method has the advantages of tight assembly between the probe body and the probe base, low ultrasonic transmission loss, and the connection between the probe body and the probe base is not easily broken under high-frequency ultrasonic vibration, resulting in high lithotripsy efficiency.

This utility model relates to the field of door lock unlocking and discloses an unlocking device. The unlocking device includes a handle rod and a insert. One end of the handle rod is fixedly connected to the insert, and the other end of the handle rod extends away from the insert. The end of the insert away from the handle rod has a plug-in portion, which is configured as a rectangular insertion slot suitable for fitting the square steel handle. The handle rod serves as the user's grip base, driving the insert to be inserted into the lock box. The plug-in portion is specifically inserted into the lock box, and its rectangular insertion slot ensures precise alignment and fitting with the square steel handle inside the lock box. By twisting the handle rod, the insert drives the square steel handle to rotate, thereby opening the lock cylinder inside the lock box and achieving the unlocking purpose. The extension design of the handle rod away from the insert helps to form an effective lever arm, making it easier for the user to apply force. The unlocking device provided by this utility model has a simple structure, is easy to operate, and has good applicability.

本实用新型公开了一种网络耦合装置，属于网络耦合技术领域，包括外壳体，外壳体内安装有网络耦合系统，外壳体后端安装有多个均匀分布的网络接口模块，外壳体左右两端均开设有多个均匀分布的条形散热孔，网络接口模块包括线套，线套内端设有多根数据线，线套前端固定连接有适配板，适配板远离线套一端固定连接有一对支撑板，一对支撑板之间转动连接有适配器本体，适配器本体外端固定连接有多个硬件接口，通过可旋转的适配器本体集成多种硬件接口，用户可根据实际需求快速切换以太网、USB、光纤等不同接口类型，无需借助外部转接设备，不仅简化了设备连接流程，还显著降低了多协议组网的成本，尤其适用于需要同时接入异构网络的工业控制场景。

The invention discloses a contact piece capable of realizing multilayer contact, a plug connector and a plug mechanism, the contact piece comprises a welding part, a connecting part and a reed part, the connecting part comprises a first connecting part and a second connecting part, the reed part comprises a first reed group and a second reed group, the second reed group, the second connecting part and the welding part are integrally connected, and the first reed group and the second reed group are integrally connected. The second reed group is respectively arranged on the upper and lower side surfaces of the second connecting part, two ends of the first connecting part are respectively integrally connected with the left and right side surfaces of the second connecting part, and the first connecting part is integrally connected with the first reed group. Under the condition that the width of the second connecting part is not increased, the number of the cantilevers is increased by increasing the number of the first reed groups which are indirectly connected with the left and right surfaces of the second connecting part through the first connecting part, so that the number of the contact points can meet the required overcurrent capability; the problem that in the prior art, only contact points are additionally arranged on the upper side face and the lower side face of a connecting part, and the number of the contact points cannot meet the required overcurrent capacity is solved.

This invention provides a lithium titanium dioxide sodium phosphate anode material and an aqueous lithium-iodine battery based thereon, belonging to the field of secondary battery technology. The chemical formula of the lithium titanium dioxide sodium phosphate anode material is Li. x Na y Ti2(PO4)3, where 0

A socket sleeve structure for use with copper contacts in a receptacle features an angled design where the curved portion away from the terminal connection is tilted towards the flat portion away from the terminal connection. This design allows the plug to form a good elastic contact with the curved portion after insertion, increasing the stability and conductivity of the connection. Furthermore, this tilted design facilitates smooth sliding of the plug during insertion and removal, reducing resistance and extending the socket's lifespan. Simultaneously, the surface contact between the flat portion and the plug ensures stable current transmission, while the point or line contact between the curved portion and the plug provides additional elastic support, making the entire connection structure more reliable. This sleeve structure design also reduces the contact area during plug insertion, preventing misalignment or jamming, and allows for smooth removal of the plug from the slot, improving the ease of insertion and removal and enhancing the feel of the plug.

The invention relates to the technical field of geological exploration, in particular to geological exploration equipment and an exploration method, and the geological exploration equipment comprises a fixed foot stool which is provided with a positioning plate. According to the geological exploration equipment and method, a semicircular cylinder is pushed to rotate by 180 degrees to penetrate through a through groove to be attached to the other side of a positioning plate, in the process, a protruding block is extruded when penetrating through the through groove, a clamping block is pushed to deflect, locking of a semicircular blade is relieved, the semicircular blade is driven by a torsional spring to rotate upwards to be transversely cut on the inner side of the semicircular cylinder, and the semicircular blade is fixed to the inner side of the semicircular cylinder. Compared with the bottom sealing of an existing fixing structure, when the sampling barrel is inserted into the soil, the semicircular blade can be combined with the semicircular cylinder to form a same-position structure, so that the insertion resistance is reduced, and the sampling barrel can be conveniently taken out. And then the semicircular blade is switched to an ectopic structure through rotation to complete sampling, so that the soil cannot be extruded to increase the working intensity, and the stable taking-out of the sample can be ensured.

The utility model discloses a cell culture plate for screening liver cancer drugs, and belongs to the technical field of cell culture. The liver cancer drug screening cell culture plate comprises a plate body, a cover body is arranged at the top end of the plate body, a pair of hinges is installed on one side of the cover body, one end of each hinge is fixedly connected with one side of the plate body, a groove is formed in the top end of the plate body, a plurality of culture cells are installed at the bottom end of the groove, and insertion sleeves are installed at one ends of the two sides of the plate body. The other ends of the two sides of the board body are respectively provided with an inserting mechanism used for being connected with the inserting sleeve, each inserting mechanism comprises an inserting head, the top end and the bottom end of each inserting head are respectively provided with a clamping block, the top end and the bottom end of the inner side of each inserting sleeve are respectively provided with a clamping groove, and one end of each clamping block is connected with the inner side of the corresponding clamping groove in a clamped mode. The waste of the culture plate is reduced, and the practical value is higher.

The invention discloses an optical module radiator and an optical module assembly, and relates to the technical field of communication.The optical module radiator comprises a heat exchange shell, a pressure regulating device and a plurality of metal films, and a heat exchange cavity used for containing heat exchange media is formed in the heat exchange shell; the bottom of the heat exchange shell is provided with a plurality of first communication ports used for being in one-to-one correspondence with a plurality of optical module cages of the optical module assembly, the first communication ports are communicated with the heat exchange cavity, the plurality of metal films are in one-to-one correspondence with the plurality of first communication ports, and each metal film covers the corresponding first communication port. The pressure adjusting device is used for adjusting the medium pressure of the heat exchange medium, the optical module radiator is of an integrated structure, one heat exchange shell corresponds to a plurality of optical modules, fasteners and independent heat pipes are greatly reduced, assembly is simplified, cost is reduced, the metal film can be attached to the top contour of the optical modules in a self-adaptive mode, contact thermal resistance between the metal film and the optical modules is reduced, and the service life of the optical modules is prolonged. The heat conduction efficiency is obviously improved, and the heat dissipation efficiency is further improved.

This invention discloses an underwater equipment installation device, including a support body, an insertion component, a power storage component, a triggering component, and a deployment component. The support body is used to support and position the underwater equipment. The insertion component is fixed to the underwater equipment and is used to insert into an underwater substrate. The power storage component is disposed at one end of the insertion component and is used to apply force to the insertion component after triggering to insert it into the underwater substrate. The triggering component is fixed to the support body and is used to trigger the power storage component. The deployment component is disposed on the outer periphery of the insertion component and has a retracted state and an deployed state. After the insertion component is inserted, the deployment component unfolds along the insertion direction perpendicular to the insertion component and inserts into the underwater substrate, changing from the retracted state to the deployed state. This invention aims to solve the technical problem in the prior art that underwater equipment is difficult to stably insert and maintain in place in an underwater environment due to water flow disturbance and the influence of soft underwater foundations.

This utility model relates to the field of fluorescence immunoassay analyzer technology, specifically a reagent card positioning device for a fluorescence immunoassay analyzer. It includes an instrument assembly, a reagent card assembly, and a positioning assembly. The instrument assembly includes an analyzer body, the reagent card assembly includes a reagent card body, and the positioning assembly includes a linkage slide plate and a handle. A groove is formed on the inner side of the front end of the analyzer body, and a positioning inner post is formed on the inner side of the analyzer body. A reagent hole is provided on the inner side of the upper part of the reagent card body, and a positioning inner hole is formed on the inner side of the front wall of the reagent card body. One end of the linkage slide plate is connected to a positioning insertion rod. The analyzer body is designed for fluorescence immunoassay analysis of samples within the reagent card body. The elastic buffer pad absorbs the impact force when the reagent card body is inserted, preventing sample splashing or displacement due to collision within the reagent hole.

This application discloses an intracranial pressure probe and its packaging method, relating to the technical field of intracranial pressure probes. The intracranial pressure probe includes a sensor and a coated lead wire, with the proximal end of the sensor electrically connected to the distal end of the coated lead wire. It includes: a protective frame with a window on its side wall; the sensor is disposed within the protective frame and corresponds to the window; a plug with a convex spherical surface at the distal end of the protective frame, the edge of which smoothly connects to the side wall of the protective frame; and a conduit sleeved over the coated lead wire and connected to the proximal end of the protective frame. A window transition structure is provided between the end of the sensor and the edge of the window, and a first transition structure is provided between the proximal end of the protective frame and the outer surface of the conduit. Both the window transition structure and the first transition structure are arc transitions. A gel filling layer is provided inside the conduit, between the protective frame, and between the sensor. This solves the problem of intracranial pressure probes easily scratching tissue in related technologies.

The utility model provides a locking seat capable of indicating the placement position of a chip, which comprises a locking seat box, a chip locking mechanism and a semicircular notch mark, the chip locking mechanism is arranged in the locking seat box, the locking seat box is provided with the semicircular notch mark, and the semicircular notch mark is used for indicating the direction of the chip and the serial number of a pin; according to the utility model, an ascending pressure-applying locking mechanism is adopted, the operation is simplified, asymmetric deformation of the pin locking claw is avoided, unlocking can be realized only by applying downward pressure, the spring enables the clamping plate to ascend after release, uniform lateral pressure is applied to the pin locking claw, stable locking of a chip is realized, the design reduces insertion resistance, improves positioning accuracy, and reduces the production cost. And the locking effect is durable and reliable.

The utility model discloses a kind of cooperation structure of plastic joint and rubber pipeline of air intake system auxiliary pipeline, belong to automobile engine air intake system connection technical field.The structure includes plastic joint and rubber pipe, and rubber pipe end is equipped with joint interface;Plastic joint outer periphery is equipped with annular anti-drop structure, and interference fit is formed with interface inner wall;The butt end of plastic joint and rubber pipe is respectively equipped with the axial positioning step surface of mutual adhesion, the accurate limit of assembly depth is realized.The utility model can realize reliable anti-drop and sealing without clamp, effectively solve the problem that traditional clamp is difficult to operate under narrow installation space, simultaneously reduce the number of parts, assembly cost and whole vehicle weight, suitable for clean side connection of auxiliary pipeline such as air cleaner rear-end integrated crankcase ventilation pipe, carbon tank pipe etc.

The invention belongs to the technical field of medical instruments, and particularly relates to gastrointestinal decompression equipment for gastrointestinal surgery, which comprises a liquid storage mechanism, an insertion tube and an infusion pump, and the infusion pump generates negative pressure to guide dissolved substances in the stomach of a patient into the liquid storage mechanism to complete decompression operation; the insertion tube comprises a hose, a liquid suction head and a lubricating mechanism, a lining piece is arranged in the hose to prevent deformation, and the hemispherical design of the liquid suction head is matched with the lubricating mechanism to reduce insertion resistance and reduce discomfort of a patient; the liquid storage mechanism prevents gastric soluble substances from flowing back through a backflow piece and a limiting pipe, and the operation safety is improved; the equipment is compact in structure and convenient to mount and dismount, and ensures that the whole pressure reduction process is smooth, stable and safe.

The utility model discloses an aviation connector, and relates to the technical field of aviation connectors. Comprising a pedestal and a plurality of conductive male terminals, the plurality of conductive male terminals are respectively provided with insulating blocks through molding and are installed on the pedestal through the insulating blocks, two sides of the pedestal are respectively provided with fool-proof positioning pins, and at least one plugging guide column is installed on the pedestal between the fool-proof positioning pins. According to the scheme, the connector comprises the base and the plurality of conductive male terminals, and each conductive male terminal is integrally fixed with the insulation block in an injection molding mode, so that the terminals have good structural stability and electrical insulation performance when being installed on the base, and the terminals are prevented from loosening and shifting due to vibration or long-term use.

This utility model relates to the field of sealing technology, specifically to a wear-resistant packing for a pumping unit. It includes a rubber substrate, with an anti-corrosion layer and a wear-resistant layer sequentially arranged from the inside out on the outer side of the rubber substrate. An upper rubber layer is bonded and sealed to the upper end of the wear-resistant layer, and an upper adhesive layer is coated on the upper end of the upper rubber layer. A lower rubber layer is bonded and sealed to the lower end of the wear-resistant layer, and a lower adhesive layer is coated on the lower end of the lower rubber layer. An insert rod is fixed inside the lower end of the rubber substrate, with its lower end penetrating the anti-corrosion layer and the wear-resistant layer and extending into the lower rubber layer. Multiple support frames are arranged inside the rubber substrate, and the support frames are fixedly connected to an elastic steel strip. The wear-resistant layer, anti-corrosion layer, and rubber substrate of this utility model form a gradient protection system. Combined with the flexible wrapping of the bonding interface by the upper and lower rubber layers, it achieves dual isolation from chemical corrosion and mechanical wear, ensuring long-term sealing integrity.

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 utility model discloses a frame circuit breaker connecting terminal protection structure, including the protection cover, left connecting plate and right connecting plate, and the both sides of circuit breaker connecting terminal are installed with copper row, and the structure of left connecting plate and right connecting plate is identical, and all are the L type structure of long flange face and short flange face composition, long flange face is fixedly installed with copper row, and short flange face is fixedly installed with protection cover, and left connecting plate and right connecting plate are located respectively left and right sides of protection cover, be provided with the boss portion on protection cover, be equipped with the insertion slot that is matched with copper row in boss portion, the rear side of protection cover away from boss portion is equipped with the guide piece, be equipped with the inclined plane on guide piece, the utility model discloses install after, the protection cover on the lower port connecting terminal can be isolated with the copper row of upper terminal connection effectively, make circuit breaker when opening and closing, and the instantaneous overvoltage of terminal place will not make the upper and lower terminal of same phase arc, thereby has improved the service life of circuit breaker.

The application discloses an intelligent ship pile leg with a pile driving function, which comprises a first pile, a second pile, a high-pressure water pump, a nozzle, a sensor system and a controller. The first pile is internally provided with a hydraulic cylinder, the output end of the hydraulic cylinder is connected with the second pile. The high-pressure water pump is installed on the first pile, the high-pressure water pump is provided with a water flow pipeline, one end of the water flow pipeline is connected with a suction nozzle, the suction nozzle is internally provided with a filter screen, the other end of the water flow pipeline is connected with the nozzle, and the nozzle is installed on the first pile. A scraper for cleaning the outer wall of the second pile is slidably installed on the second pile, and the bottom of the second pile is provided with a taper head. The sensor system is used for detecting seabed soil parameters, and the controller is used for controlling the hydraulic cylinder and adjusting the water flow pressure of the high-pressure water pump according to the detection parameters of the sensor system. The high-pressure water pump and the nozzle are used for driving the pile, the pile insertion resistance is reduced, and the pile insertion is more smooth. The water flow pressure is adaptively adjusted through the sensor system and the controller, and different seabed soil conditions are adapted.

This utility model belongs to the field of printer technology, specifically relating to an ink tube connector for a printer ink bottle. Installed inside the cap at the top of the ink bottle, it is integrally molded from silicone material and includes an 8-shaped boss and a circular sealing gasket at the bottom. An 8-shaped limiting hole is provided in the center of the cap, into which the 8-shaped boss is inserted. An 8-shaped through groove extending into the center of the circular sealing gasket extends into the 8-shaped boss. An ink outlet tube, stepped in shape, stands upright on one side of the top of the 8-shaped boss and communicates with the 8-shaped through groove. A groove is formed on the top wall of the other side of the 8-shaped boss, corresponding to the outline of the printer's air duct. This utility model can seal the boss with a thin film above the groove when unopened, preventing ink leakage, and facilitates quick insertion and breaking of the air duct during use, improving the ink dispensing speed of the ink bottle and preventing ink leakage.

The utility model relates to a kind of buffer based on peristaltic pump pulse inhibition, comprising: encapsulation shell, hard pipe is equipped in encapsulation shell, and adapter is installed in encapsulation shell, and the opening of hard pipe is sealedly connected with adapter, and fluid inlet is threadedly connected with adapter, and adapter is communicated with flow outlet;After the hard pipe of pulse fluid is introduced, buffer area is provided for fluid, channel volume is increased to weaken pulse energy, and the hard pipe of U shape prolongs fluid flow path and residence time, further enhances buffering, so that pulse energy is gradually dissipated, to ensure that fluid is smoothly transported to subsequent equipment or system.

The utility model provides a kind of sensor auxiliary installation tool, it is related to sensor assembly technical field.The sensor auxiliary installation tool of the present application can be accurately matched with the oblique torsion angle of wire group by the design of oblique abutment matching surface of separating pin, when inserting between winding layers, the gap between wire groups is evenly opened by the guiding effect of oblique surface, to avoid excessive displacement of winding or damage to insulation layer caused by manual separation, to ensure the formation of accurate installation space for sensor insertion.The mechanical design of oblique abutment matching surface can reduce the plugging resistance of separating pin, and at the same time, it can reduce the risk of cutting wire group through surface contact, to ensure the electrical safety of winding.The structure enables the sensor to be pressed into the wire group along the oblique angle simultaneously, maximizes the contact area between the sensor and the winding, solves the temperature measurement deviation problem caused by insufficient contact in the prior art, and improves the precision of motor temperature control system.

The utility model discloses a multifunctional pipeline fixing clamp for mechanical and electrical installation, and belongs to the technical field of mechanical and electrical installation. The fixing clamps are arranged in an array mode in the length direction of the mounting plate, and each fixing clamp comprises a base body part fixedly arranged on the mounting plate and arranged in an elastic arc shape; the elastic arms are symmetrically arranged at the two ends of the base body part in an arc shape, and the elastic arms and the base body part are hooped on the surface of the pipeline in a C shape so as to clamp and fix the pipeline; the free end of each elastic arm is provided with a bending part which bends and extends towards the inner side, and the two bending parts are in elastic contact to form a self-locking point; the self-locking point is located in the opening and closing direction of the fixing clamp, and V-shaped gaps are formed in the two sides, in the opening and closing direction, of the self-locking point so that a pipeline can enter and exit conveniently and rapidly. According to the utility model, the fixing clamp is arranged, so that the pipeline can be quickly disassembled and assembled, and the winding displacement speed and efficiency are effectively improved.

According to the plug bush structure applied to the socket copper sheet, one side, far away from the terminal connecting end, of the cambered surface part is obliquely arranged towards one side, far away from the terminal connecting end, of the plane part, so that a plug can form good elastic contact with the cambered surface part after being inserted into a slot, and the stability and the conductivity of plugging are improved. In addition, the inclined design is beneficial to smooth sliding of the plug in the plugging and unplugging process, the plugging and unplugging resistance is reduced, and the service life of the socket is prolonged. Meanwhile, the surface contact between the plane part and the plug ensures the stability of current transmission, and the point contact or line contact between the cambered surface part and the plug provides additional elastic support, so that the whole plugging structure is more reliable. Moreover, through the design of the plug bush structure, the contact area can be reduced in the process of inserting the plug, the plug is prevented from deviating or being blocked in the inserting process, the plug can be smoothly pulled out of the slot in the process of pulling out the plug, and the convenience of the plugging operation and the plugging hand feeling of the plug are improved.