1249results about How to "Realize self-locking" patented technology

The invention relates to an oil field operation device, in particular to an oil field workover treatment machine. The machine body is arranged on a hydraulic load-bearing traveling gear and is interlocked with the hydraulic load-bearing traveling gear. Hydraulic tongs connected with a telescopic bracket on the machine body can be extended out and retracted with the telescopic bracket. A clip seat is positioned below the hydraulic tongs and is arranged on a well head. An elevator which is suspended onto the machine body can reciprocate up and down. A faucet is positioned above the machine body and the clip seat; a pipe throwing device is arranged on the faucet and the machine body; and a clip unlocking device and a clip locking device corresponding to the elevator are arranged on the clip seat and the pipe throwing device respectively. A righting mechanism and a valve mechanism are further arranged on the faucet. A control cabinet is arranged on the machine body; and the clip seat, the hydraulic tongs, the elevator and the pipe throwing device are connected with a control system in the control cabinet respectively. The oil field workover treatment machine can be assembled and disassembled conveniently and rapidly, thereby not only facilitating transportation, but also changing the positions to meet the requirements of different work. Simultaneously the machine can be laid freely at a well field according to the practical conditions.

The invention relates to an intelligent anastomat which comprises an electric clamping transmission component, a manual excision-closed transmission component, an executor steering transmission component, a nail bin support (16), a nail supporting seat (17), a short connecting pipe (14), a connecting pipe (13), a movable handle (39) and a fixed handle (40), a control module is arranged on the nailsupporting seat (17), the short connecting pipe (14) and the connecting pipe (13) are connected with the nail bin support (16) and an adjusting shell (36), the movable handle (39) and the fixed handle (40) are arranged at the rear end of the adjusting shell (36), a handle (25) and a battery (45) are connected below the fixed handle (40), and a pull-back block (49) and an external power supply line (55) are arranged on the movable handle (39). Compared with the prior art, the intelligent anastomat can really reduce subjective participation of doctors, use of the anastomat is more standardized,so that harmful effects caused by lack of experience of users are avoided, and anastomosis success rate is increased.

The invention relates to a tilting mechanism, a running mode of the tilting mechanism, and the application of the tilting mechanism in a tilting rotorcraft, belonging to the technical field of tilting mechanisms. The tilting mechanism drives a tilting shaft to tilt by using a steering engine through a worm gear device, and guarantees the tilting shaft after tilting is stabilized on a preset position by using the self-locking characteristics of the worm gear device in the process of rotation. The tilting mechanism is provided with a feedback loop, the tilting shaft is provided with a rotation ring, the rotation ring is connected with one end of a draw bar, and the other end of the draw bar is connected with an angular transducer; the rotation shaft of the angular transducer and the tilting shaft rotate synchronously, and the angular transducer transfers tilting angles into electrical signals and then provides the electrical signals for a control system so as to realize feedback control.

The invention belongs to the technical field of lower limb exoskeleton robots, and discloses an ankle joint exoskeleton based on an elastic element rigidity switching mechanism. The ankle joint exoskeleton based on the elastic element rigidity switching mechanism comprises a shank brace, a foot support, a spring support, a motor support, a motor, a ball screw mechanism, an extension spring, a return spring, a penetrating type electromagnet, a ratchet wheel support and a ratchet wheel mechanism, wherein the ratchet wheel mechanism comprises a ratchet wheel and a pawl; the penetrating type electromagnet is mounted on the ratchet wheel support; one end of the return spring is connected with the pawl while the other end of the return spring is mounted on the ratchet wheel support; the lower end of the extension spring is mounted on the spring support while the upper end of the extension spring is connected and wound onto a pulley through a rope; and the pulley is arranged on a ratchet shaft. By the extension spring, a unique energy storage process of achilles tendon and an energy releasing mode can be simulated effectively, an elastic element rigidity switching function can be fulfilled on the basis of a human gait movement rule, thus, an elastic element conforms to time-variant characteristics of in-gait and inter-gait of human movement, three-dimensional geometrical parameter limitation can be broken through, and deformation of the elastic element is improved.

The invention provides an anchor for lifting prostate tissue. The anchor comprises a first anchor body, a second anchor body and a fixed thread, wherein the first anchor body and the second anchor body are connected by virtue of the fixed thread; one end of the first anchor body is provided with a fixed tube and the other end of the first anchor body is provided with an arc-shaped elastic sheet; an arc line of the arc-shaped elastic sheet is tangent with the central axis of the first anchor body, and the arc-shaped elastic sheet is bent in a direction opposite to the direction of the fixed thread; the second anchor body is a V-shaped elastic clamp which is such defined that a first clamping arm and a second clamping arm are fixedly connected by virtue of an end; locking teeth A and locking teeth B, which are same in structure, are arranged on the opposite side faces of the first clamping arm and the second clamping arm; a locking tooth buckle is defined by the locking teeth A and the locking teeth B; one end of the fixed thread is fixedly arranged in the fixed tube and the other end is clamped and fixedly arranged in the locking tooth buckle; according to the anchor, the first anchor body can automatically form a self-locking state when released, and by virtue of the locking tooth buckle which is arranged on a clamping face of the second anchor body and has functions of unidirectional guiding and reverse locking, the phenomenon that an operation becomes failed in the case that the clamped fixed thread slips is avoided.

The invention provides a grain bin grain condition intelligent detection and monitoring system based on a mobile robot technology. The system comprises a grain bin intelligent tour inspection robot, a grain bin intelligent tour inspection robot control device, a wireless communication module, an ultra-wideband positioning device, environmental adjustment equipment, a computer and an alarm device. The grain bin intelligent tour inspection robot comprises a crawler type walking system, a grain bulk automatic detection system, a grain bulk grain surface leveling system, a power supply, an image photographing monitoring system, a wireless signal transmission system and a control system. The system can perform autonomous movement, accurate positioning and grain bulk temperature and humidity real-time detection and automatic control and adjustment in the grain bulk, and can realize real-time dynamic omnibearing grain condition monitoring and grain storage environment full-automatic adjustment.

The invention discloses a self-adaptive underactuated robot clamping claw which comprises a clamping claw shell, a drive module and finger modules. The clamping claw shell comprises a front clamping claw shell body, a rear clamping claw shell body and a fixing flange, wherein the front clamping claw shell body and the rear clamping claw shell body are connected and are further in bolt connection with the fixing flange. The drive module is arranged in the clamping claw shell and comprises a drive motor, a power transmission device and drive rods. The drive motor is used for driving the drive rods to make synchronous linear motion and transmitting torque through the power transmission device. The finger modules comprise the first finger module and the second finger module which are each provided with a first finger section and a second finger section. Each first finger section and the corresponding second finger section are hinged to the corresponding drive rod through a self-adaptive connecting rod system and a parallel connecting rod system, and area driven to move through the drive rod. The self-adaptive underactuated robot clamping claw can grab objects in different shapes in different manners, is suitable for requirements of different occasions and high in clamping range and clamping force, and can grab the objects more conveniently.

The invention relates to a gapless gear transmission device and a method for removing a gear transmission gap. The gapless gear transmission device comprises a third gear connected with an output shaft of a driving device, a first gear and a second gear, wherein the first gear and the second gear are simultaneously meshed with the third gear and installed on a gear shaft in parallel, gear modules of the first gear and the second gear are same, the first gear is fixed on the gear shaft through a key groove, and penetrated wedge-shape similar holes are arranged on a gear face of the first gear. The second gear is sleeved on the gear shaft and can rotate along the gear shaft, axial movement is achieved through a spring and an adjusting nut installed on the gear shaft, a wedge-shape similar protruding block matched with the wedge-shape similar holes is arranged on the second gear corresponding to the positions of the wedge-shape similar holes, and a junction surface of the holes and the protruding block is a spiral curved surface. Staggered angles between the first gear and the second gear are adjusted through mutual rotation between the wedge-shape similar holes and the wedge-shape similar protruding block, and a transmission gap between gears is removed. The gapless gear transmission device and the method are simple in structure, convenient to operate and wide in application scope.

The invention discloses a self-locking type emulsion pump which comprises a pump chamber. A pump bead mechanism is arranged at the lower end of the pump chamber. A liquid inlet is formed in the portion, at the lower end of the pump bead mechanism, of the pump chamber. The self-locking type emulsion pump is characterized in that a locking cap capable of connecting a locking bottle cap to the pump chamber is inserted in the upper end of the pump chamber, the outer wall of the locking cap and the inner wall of the pump chamber are sealed, a pump rod is arranged in the pump camber, penetrates the locking cap and is movably sealed with the locking cap, a suction plug is arranged at the portion, at the lower end of the locking cap, of the pump rod, a bend is connected to the upper end of the pump rod, ribs are arranged on the outer wall of the lower end of the bend, limiting steps are arranged at the upper end of the locking cap and jacked by the ribs when the bend is locked, receding grooves allowing the ribs to move vertically are formed in the inner wall of the locking cap, and the limiting steps are communicated with the receding grooves. The self-locking type emulsion pump is simple in structure, convenient to use and capable of being locked by rotating the bend.

The invention belongs to the field of robot clamping jaws, and specifically relates to a self-adaptive under-actuated turning three-finger robot clamping jaw. The clamping jaw comprises a clamping jawshell, a drive module, a first finger module, a second finger module and a third finger module, wherein the drive module is installed in the clamping jaw shell and comprises a first drive motor, a second drive motor, a first power transmission system, a second power transmission system and three drive rods, the three finger modules are distributed circumferentially and are distributed at three sides of the top of the clamping jaw shell, each finger module comprises a finger base, a first finger section and a second finger section, the first drive motor drives the three finger modules to finish a grasp action through the first power transmission system, the second drive motor drives the second finger module and the third finger module to rotate along respective axis through the second power transmission system so as to acquire corresponding gestures of different finger modules. The clamping jaw can grasp a target object adaptively, has a large stroke, grasps stably, and has a graspingand self-locking function.

The invention discloses an electric vehicle permanent magnet DC brushless motor controller and a control method. The electric vehicle permanent magnet DC brushless motor controller comprises a control unit, a power driving unit, an inverter unit and BLDCM, a position detection unit and a signal input unit; subjects various input signals to logic synthesis in order to provide various control signals for a driving circuit; generates a PWM signal with a corresponding duty cycle in order to adjust the rotating speed of a motor, realizes motor self-locking by changing a driving timing sequence; and achieves overcurrent, undervoltage, and overvoltage fault protection functions. While guaranteeing the normal operation of an electric vehicle, the electric vehicle permanent magnet DC brushless motor controller improves the efficiency of the motor and a storage battery, saves energy, is simple in hardware structure, low in cost, perfect in function and high in reliability, and has high application and promotion values.

The invention relates to a conveying device, in particular to a carton conveying and positioning device with adjustable interval. The device comprises a sliding support part, an adjusting screw part,and a dual-synchronous-belt conveying part, dual sliding block guide rails are arranged on the two sides of a rack and are used for supporting sliding of a synchronous belt support, the support is arranged on sliding blocks of the dual sliding block guide rails, two sets of left-handed and right-handed screws are transmitted through a chain, synchronous centered moving is achieved, through a copper nut connecting plate, the synchronous belt support is connected with a left-handed copper nut and a right-handed copper nut, and interval adjusting of the synchronous belt support is achieved; two synchronous belt conveying devices are arranged, through square shaft transmission, stable synchronous rotation is ensured, the interval can be adjusted, interval adjusting of boxing and conveying canbe achieved, the device is suitable for boxing transportation of different sizes, and adaptation is improved; a hollow structure is arranged between the two synchronous belt conveying devices, a blocking air cylinder and a pushing air cylinder are added, and positioning and pressing of cartons on the fixed position of the conveying device can be achieved.

The invention discloses a sealing structure for a strip-shaped lamp. The sealing structure comprises a strip-shaped section lamp body, a transparent lamp housing and a C-shaped sealing strip, wherein the lamp body is provided with a U-shaped lamp groove; an opening part of the lamp groove is provided with a longitudinal run-through seal groove; the sealing strip is clamped on a side edge of the transparent lamp housing in a C shape and is locked through a transfer type clamping mechanism consisting of a clamping groove and a clamping strip; the clamping groove is formed on the opening part of the lamp groove and runs through longitudinally; the part, which is close to the bottom, of an inner side wall of the clamping groove is provided with a locking bump; the part, which is close to the upper opening part, of an outer side wall of the clamping groove is provided with a transfer bump; the section of the clamping strip is T-shaped and is provided with a pressing plate part, a straight part and a locking hook; the pressing plate part is tightly pressed on the sealing strip; the straight part is formed downwardly vertical to the pressing plate part; and the locking hook is arranged on the same side as the pressing plate part and is matched with the locking bump. Through the structure, the clamping strip is clamped into the clamping groove in a transfer mode, and self-locking of the clamping strip is realized by means of elastic reacting force of the sealing strip; water-proof sealing of the strip-shaped lamp is realized; the lamp has a simple structure, is easy to assemble and has high efficiency; and the appearance of the lamp is not affected.

The invention provides a multifunctional fabricated hydraulic drive moveable trestle, relating to a hydraulic drive moveable trestle used for various excavation constructions carried out by various tunnel or cavity drilling and blasting methods. The trestle comprises a main trestle and approach trestles positioned on both ends of the main trestle, wherein, the main trestle comprises a transverse beam and trusses connected to both sides of the transverse beam, the upper and the lower ends of the trusses are respectively provided with upper chord members of the main trestle and lower chord members of the main trestle. The invention has the technical scheme that a steering wheel is installed on the front end of the main trestle, a driving wheel and a rear supporting device are installed on the rear end of the main trestle, and lifting mechanisms are arranged on the steering wheel and the driving wheel. Moveable tracks are installed on the lower chord members of the main trestle between the steering wheel and the rear supporting device; concrete slicking devices, fixing devices for inverted arch templates, front supporting devices and lengthwise moved idler pulleys for front support are installed on the moveable tracks, and drawing mechanisms are installed on the lower chord members of the main trestle on the left and the right sides of the trestle. The trestle is suitable for various excavation constructions of public roads, railroads, water diversion, flood discharge, anti-aircraft defense, and the like by the tunnel or cave drilling and blasting methods, and meets the requirements of simultaneous construction, namely the tunnel or cave excavation and the pouring of concrete for the bottom inverted arch.

The invention discloses a variable-speed transmission mechanism for relay transmission of variable-diameter gears. The variable-speed transmission mechanism comprises two variable-diameter relay transmission gears, variable-diameter adjusting mechanisms, a power input shaft and a power output shaft, wherein the two variable-diameter relay transmission gears are connected with each other through a transmission gear group; the variable-diameter adjusting mechanisms are respectively arranged on the two variable-diameter relay transmission gears; the power input shaft is connected with one variable-diameter adjusting mechanism, and the power output shaft is connected with the other variable-diameter adjusting mechanism. Based on the basic principle of infinitely variable speed, through unique and novel design concept, variable transmission ratio of a main driven wheel is realized by utilizing a clack body combined type variable-diameter wheel body, effective variable-diameter control is realized through the variable-diameter adjusting mechanisms, and power transmission is realized through engagement of gear belts and gears; the variable-speed transmission mechanism is simpler in structure, superior in weight volume and lower in production and manufacturing costs; moreover, the variable-speed transmission mechanism is firmer in structure, the bearing load and torque transmission capacity are greatly improved, and the problems in the prior art that thermal decay exists and larger torques cannot be transmitted through friction transmission speed are solved, so that the variable-speed transmission mechanism can be widely applied to large-displacement automobiles.

The invention discloses an electro-hydraulic servo numerical control push rod device. The electro-hydraulic servo numerical control push rod device comprises a shell and a servo motor located inside the shell, wherein a coaxially-arranged screw rod is connected with one output shaft of the servo motor; a nut is in threaded sleeved with the screw rod; the electro-hydraulic servo numerical control push rod device further comprises a push rod which is coaxially fixedly connected with the nut. The electro-hydraulic servo numerical control push rod device is characterized in that the servo motor is a double-shaft motor; another output shaft of the servo motor drives a set of hydraulic push system composed of an oil pump, a hydraulic cavity, a hydraulic channel and an electromagnetic control valve. The electro-hydraulic servo numerical control push rod device integrates the advantages of an existing two kinds of push rod devices, and overcomes the disadvantages of the both push rod devices, so that not only can the movement precision be accurately controlled, but also the flexible regulation can be realized. Furthermore, the electro-hydraulic servo numerical control push rod device can be used for bearing a large load and a flexible load, and has a wide application range.

The invention belongs to the technical field of bolts, and particularly relates to a safety bolt which comprises a bolt rod and a bolt box, wherein the bolt rod penetrates in the bolt box; the bolt box comprises a bolt shell and a base; the bolt shell is divided into a reset cavity and a safety cavity by a partition plate; a baffle for preventing the bolt rod from sliding down from the safety box is fixed on the bolt rod and arranged in the reset cavity; the reset cavity is provided with a reset spring for resetting the bolt rod; a safety pin, a positioning spring and a spring positioning block are assembled in the safety cavity; the spring positioning block is fixed at the lower middle part of the safety pin; the lower end of the positioning spring is connected with the spring positioning block and sleeves the safety pin above the spring positioning block; the upper end of the safety pin penetrates out of the top of the safety cavity; a safety hole is formed in the bolt rod; the diameter of the safety hole is greater than the diameter of the safety pin. According to the safety bolt provided by the invention, the bolt rod slides toward the safety cavity so that the safety pin slides into the safety hole to realize self-locking of the bolt; automatic rebound of the bolt rod is realized through the reset spring by pulling out the safety pin.

An electric armrest of an automobile seat comprises a top cover and a bottom cover, wherein the top cover is separated from the bottom cover, a mechanical transmission mechanism is arranged between the top cover and the bottom cover, the top cover is connected with a moving end of the mechanical transmission mechanism, the mechanical transmission mechanism is connected with an output shaft of an electric motor, and a control end of the electric motor is connected with a control circuit. A self-locking structure is arranged inside the mechanical transmission mechanism. The mechanical transmission mechanism comprises a parallel four-rod mechanism and a driving mechanism, the driving mechanism comprises a transmission device and a sliding block, a fixing support and a guide rail are arranged on the bottom cover, and the transmission device is composed of a worm-and-gear structure and a screw nut pair two-stage transmission mechanism. The control circuit is arranged between the top cover and the bottom cover and is connected with a key plate, a control line and a power line. By the aid of the electric armrest, the height of the top cover can be adjusted at random, so that the height of the armrest can be adjusted, the comfort of driving is improved, and the fatigue during long-term driving is avoided.

The invention provides a dual-freedom degree tracking cloud deck with an inertial orientation function. The cloud deck comprises a rear cover plate, an azimuth shaft angle sensor, a pitch shaft component, a pitch shaft hand wheel, a kickoff locking mechanism, an external interface, an indicating lamp, a front panel, a dynamic tuning gyroscope, an upper bracket, a signal processing circuit, a pitch shaft angle sensor, an azimuth shaft component, a metal flange water level, an azimuth shaft hand wheel and a structure bracket. The cloud deck is compact in structure and light in weight, has an inertial north-seeking and a tracking angle measuring function, belongs to a manual control load movement measurement platform, can drive a load to rotate in two freedom degrees, i.e. azimuth and pitch, can measure the angle rotating in the manner of being relative to a geographic coordinate system, and has a data output function. Azimuth rotation and pitch rotation can be slightly adjusted by the hand wheels; a self-locking function is realized; a rotation process is stable; in the aspect of azimuth, the cloud deck has a free revolution function and a hand wheel slight adjustment switching function.

The invention discloses an air control pilot type magnetic self-locking bi-stable engine control valve structure. The air control pilot type magnetic self-locking bi-stable engine control valve structure comprises a main valve, an air cylinder and an auxiliary valve; the auxiliary valve is of a two-position three-way permanent magnet self-locking structure and can be self-locked through electromagnetic force generated by a permanent magnet, the opening movement and the closing movement can be carried out when pulse currents are guided into coils, the auxiliary valve controls gas to fill a piston cavity of the main valve or to be exhausted from the piston cavity of the main valve, and therefore a main valve core can be opened or closed under the effect of aerodynamic force of a piston and spring force. According to the air control pilot type magnetic self-locking bi-stable engine control valve structure, an engine control valve is light in weight and low in power consumption.

The invention relates to the technical field of washing, in particular to a rotary knob component with self-locking and positioning functions. The rotary knob component is applied to controllers of household appliances such as washing machine and the like and comprises a rotary knob and a fixing base, the rotary knob is provided with a bushing, the fixing base is provided with a positioning sleeve which can be matched with the bushing, the bushing can be rotatably inserted into the positioning sleeve and is provided with an annular clamping groove, a clamping claw corresponding to the annular clamping groove is arranged on the positioning sleeve of the fixing base, and the clamping claw is clamped in the annular clamping groove when the bushing and the positioning sleeve are matched. The rotary knob component is simple in structure and assembly mode and low in production cost, and the problem of eccentricity of the rotary knob due to shaking is solved. Preferably, a height difference is formed between the lower edge of a shell and the top end of a boss, so that water is prevented from entering the washing machine even if the water enters a gap between the rotary knob and the fixing base, and the rotary knob component realizes self-locking, positioning and waterproof functions at the same time.

The invention relates to a structurally integrated piezoelectric inchworm linear motor. The structurally integrated piezoelectric inchworm linear motor comprises a left clamping mechanism, a right clamping mechanism, a driving mechanism, and an output shaft, wherein the driving mechanism is located between the left clamping mechanism and the right clamping mechanism, the left clamping mechanism and the right clamping mechanism are respectively provided with a first clamping body, a second clamping body, and a clamping drive assembly respectively, the driving mechanism comprises a left rigid part, a right rigid part, an intermediate rigid part, a pre-tightening elastic part, a flexible thin plate, and a piezoelectric actuator for driving, a clamping position for clamping the piezoelectric actuator for driving is arranged between the pre-tightening elastic part and the intermediate rigid part, the output shaft passes through the left rigid part, the piezoelectric actuator for driving, and the right rigid part at a time, a pre-tightening screw for pre-tightening the piezoelectric actuator for driving is arranged between the left rigid part and the middle rigid part, and a vacancy forinserting the pre- tightening screw for the piezoelectric actuator for driving is formed in the left clamping mechanism. The structurally integrated piezoelectric inchworm linear motor has the advantages that the clamping mechanism is integrated with the driving mechanism and the piezoelectric actuator can be clamped off when only subjected to pressure.

The invention relates to a spiral pipe inner wall weld joint grinding device. The spiral pipe inner wall weld joint grinding device comprises pipeline supporting mechanisms at the two ends, a rotary feeding mechanism and a grinding and executing mechanism, wherein each pipeline supporting mechanism comprises a central supporting seat and a plurality of movable supporting legs capable of self-locking, the movable supporting legs are evenly spaced along the circumferential direction and are arranged on the central supporting seat in a telescopic manner, the rotary feeding mechanism comprises anaxial sliding rod, a rotary servo driving device, a screw rod mechanism and an axial stepping motor, wherein the axial sliding rod and the screw rod mechanism are correspondingly arranged between thepipeline supporting mechanisms at the two ends in the axial direction, the axial sliding rod is driven to rotate through the rotary servo driving device, the screw rod mechanism is driven and controlled by an axial stepping motor, the grinding and executing mechanism is movably arranged on the axial sliding rod through a moving platform and is driven to move in the axial direction through the screw rod mechanism, and the grinding and executing mechanism is provided with a telescopic adjusting structure. According to the spiral pipe inner wall weld joint grinding device, mechanical grinding ofspiral welding joints on the inner wall of a spiral pipe can be realized, the stability is high, and the accuracy is good.

The invention discloses a flexible seal self-locking socket and spigot joint. The flexible seal self-locking socket and spigot joint comprises a socket, a spigot and a seal ring; wherein after the spigot is assembled on the socket, first annular protrusions and second annular protrusions from self locking, and gaps are arranged between the first annular protrusions and the second annular protrusions, and a socket pipe body can deflect relative to a spigot pipe body.

The invention belongs to nuclear power plant pressurized water type reactor structure technology, and particularly discloses a ball cone irradiation sample stopple with a self-locking pressurized water reactor. The stopple is composed of an upper end head, a substrate, an optical shaft, a water pressure pushing rod, a cone ring, a ball, a locknut and two springs, wherein the upper end head is positioned at the upper end of the substrate, the spring is arranged in the substrate, the cone ring is positioned at the lower end of the substrate, the water pressure pushing rod penetrates the center of the cone ring and enters the inner cavity of the substrate, the cone surface of the cone ring is fitted with the ball, and the two springs are mounted outside the water pressure pushing rod in a sleeving manner. The cone ring and the ball are mounted below the substrate, and the ball and the cone ring are tightly fitted, through the adoption of the designed pushing rod structure, and the cone surface pushes the ball outwards to ensure that the ball and the wall of an irradiation sample hole are locked automatically. The irradiation sample stopple is simple and not high in processing precision, and can not be affected by cold water long term corrosion in operation process. Higher safety margin can be obtained after uniform loading of a plurality of balls, and the additional arrangement of the overload protection structure can further improve safety.

The invention discloses a drafting brace for ankle joint contracture. The drafting brace comprises a lower limb fixing web, a push rod mounting support block, a push rod mounting pin, a left electric push rod, a rear elastic joint connecting strap, a side-part elastic joint connecting strap, a foot support, a left foot sole push rod mounting block, a left foot sole push rod mounting pin, a left foot sole push rod mounting rotary joint, an ankle joint angle adjusting knob, a right foot sole push rod mounting rotary joint, a right foot sole push rod mounting pin, a right foot sole push rod mounting block, a right electric push rod, a lower limb fixing binding band, a push rod control panel, a 24V push rod power supply and an elastic joint connecting strap pin. According to the drafting brace for the ankle joint contracture, ligaments and muscle around the ankle joint can be drafted by automatically adjusting the ankle joint angle, and are locked at corresponding positions, so as to help a patient improve the range of motion of the ankle joint and treat the ankle joint contracture.

The invention discloses a circuit for soft startup and soft shutdown. The circuit comprises a positive (P)-channel metallic oxide semiconductor field effect transistor (MOSFET), a negative (N)-channel metallic oxide semiconductor field effect transistor (MOSFET), an isolating component, an input input / output (I / O) port and an output I / O port, wherein the source of the P-channel MOSFET is connected with an external power supply; the grid of the P-channel MOSFET is connected with the external power supply through a first resistor; the drain of the P-channel MOSFET is connected with a system power supply; the source of the N-channel MOSFET is grounded; the grid of the N-channel MOSFET is grounded through a second resistor; the drain of the N-channel MOSFET is connected with the grid of the P-channel MOSFET; the first electrode of the isolating component is connected with the grid of the P-channel MOSFET; the second electrode of the isolating component is connected with the system power supply through a fourth resistor; the third electrode of the isolating component is grounded through a power button; the input I / O port is connected with the second electrode of the isolating component; and the output I / O port is connected with the grid of the N-channel MOSFET through a third resistor. The startup / shutdown control process of the circuit comprise the following steps of: detecting whether the input I / O port is in a low-level state or not; if the input I / O port is in a high-level state, finishing the process; and if the input I / O port is in the low-level state, setting the output I / O port in the high-level state or in the low-level state. Thereby, the circuit can ensure that power is cut off completely when a system is shut down and no standby current exists.

The invention discloses a handheld flexible multi-joint surgical instrument for abdominal cavity minimally invasive surgery, and relates to the technical field of medical equipment for laparoscopic minimally invasive surgery. The handheld flexible multi-joint surgical instrument comprises a tail-end surgical forceps mechanism, a wrist flexible multi-joint combination and a control box. The wrist flexible multi-joint combination comprises a plurality of hook joins which are structurally identical to one another, the heads and the tails of the multiple hook joints are sequentially connected withone another, and the hook joint at the head of the wrist flexible multi-joint combination is connected with the tail-end surgical forceps mechanism; the control box comprises a shell, a routing pipe,a bottom plate, a gear transmission mechanism, a guide column group and two groups of bidirectional ratchet wheel transmission mechanisms, and the gear transmission mechanism, the guide column groupand the two groups of bidirectional ratchet wheel transmission mechanisms are arranged on the bottom plate. The handheld flexible multi-joint surgical instrument has the advantages that the problems of low flexibility ratios of the traditional medical surgical instruments and restriction on surgical operation due to rigid structures can be solved by the aid of the handheld flexible multi-joint surgical instrument; the handheld flexible multi-joint surgical instrument has movement self-locking properties, and a doctor can operate the handheld flexible multi-joint surgical instrument with a single hand; the handheld flexible multi-joint surgical instrument can be used for the abdominal cavity minimally invasive surgery.

The invention provides a portable mechanical endoscope fixture comprising a base, a horizontal rotating mechanism and a lifting pitching mechanism. Through adjustment of three degrees of freedom, an endoscope being fixed can be horizontally rotated, lifted up and down and pitched. The portable mechanical endoscope fixture has the advantages that manual fixing of the endoscope is completely replaced; the lifting pitching mechanism and a vertical lifting mechanism are arranged at the edge of the horizontal rotating mechanism, more operating space is saved, and more medical instruments can be used in surgery; in addition, a sound-operated or foot-operated control device can be added to the portable mechanical endoscope fixture, and medical labor cost is saved.

The invention discloses a clamping and lifting type car carrier, including two carrier bodies with the same structure. Each carrier body includes a walking car body for walking, a lifting frame arranged above the walking car body, a lifting mechanism for jacking the lifting frame, and a clamping mechanism arranged on the lifting frame, each clamping mechanism includes guiding rails, two sets of arm clamping holding frames matched with the guiding rail and capable of moving in the horizontal direction, and clamping arms hinged to the arm clamping holding frames; and synchronous gear boxes are arranged on the lifting frames located between the guiding rails, the output ends of the synchronous gear boxes synchronously drive the expansion and contraction of the two sets of clamping arm holdingframe through two sets of synchronous racks, and the input ends of the synchronous gear boxes is connected with a centering motor in a transmitting mode through a transmission mechanism. According tothe clamping and lifting type car carrier, automatic clamping to car wheels is achieved while the center layout of cars about the center of the carrier body is achieved, the functions of the centering device and arm clamping holdingmechanisms are reused, and car -tipping is prevented.