215 results about "Hand shaking" patented technology

The invention discloses a smart slave manipulator robot arm control system and a control method. The control system comprises a parameter module which stores structure parameters of a plurality of different types of robot arms; the detection module is used for detecting detection information of the robot arm; the control module selects a control algorithm and outputs a control instruction to the driving module; and the driving module receives the control instruction output by the control module, and drives the robot arm to perform motion control, jitter control, obstacle avoidance control and arm change control according to the control instruction. The flexibility of the robot arm is improved, the control accuracy and safety of the robot arm are improved, the control accuracy is improved, misoperation such as manual operation hand shaking is prevented, and the situation that when a master manipulator robot arm control system breaks down, after a slave manipulator robot arm loses an instruction, the slave manipulator robot arm moves randomly due to the absence of a slave manipulator control system is avoided. Therefore, the damage influence on the surrounding operation environment is reduced.

The utility model discloses a biological cell sampler, which relates to the technical field of cell sampling and comprises a fixing plate, one side of the upper surface of the fixing plate is fixedly connected with the lower surface of a motor, the output end of the motor is fixedly connected with one end of a transmission shaft, and one side of the outer circumferential surface of the transmission shaft is fixedly connected with one side of the inner surface of a transmission mechanism. One side of the outer circumferential surface of the transmission mechanism is rotationally connected with one side of the inner surface of the push rod, the other side of the inner surface of the push rod is rotationally connected with one side of the inner surface of the connecting block through a rotating shaft, the lower surface of the connecting block is fixedly connected with one side of the upper surface of the moving rod, and one side of the lower surface of the moving rod is slidably connected with one side of the upper surface of the fixing plate. The position of the fixing ring is fixed through the transmission plate, the swing rod is driven by external force to rotate with the second supporting block as the center, the telescopic rod is driven by the swing rod to horizontally slide on the inner surface of the fixing ring, the effect of moving according to the operation position of the sampler is achieved, and the problems that a traditional sampler needs to be held by hand, and fatigue is easily caused after long-time operation are solved. And hand shaking is avoided.

The invention belongs to the technical field of medical instruments, and provides a nephrology department auxiliary renal puncture device which comprises portal frames longitudinally placed at the two ends of a bed, each portal frame is provided with a first moving structure, and the lower end of each first moving structure is provided with a second moving structure capable of moving front and back. An angle adjusting structure capable of changing the direction is arranged at the bottom end of the second moving structure, a placing plate for supporting the arms of a doctor is arranged at the bottom end of the angle adjusting structure, in the operation process, the hands of a medical worker are placed on the supporting plate to serve as a support, and hand shaking caused by long-time suspension operation is prevented; by adjusting the first moving structure and the second moving structure, the supporting plate moves left and right or front and back to align to a patient operation area; by arranging the angle adjusting structure, the arms of the medical staff can be inclined for operation according to different body types of patients, and the accuracy of the operation of the medical staff is improved.

The prism positioning support for the total station comprises a fixing lantern ring, positioning assemblies and supporting legs, the positioning assemblies are distributed on the fixing lantern ring in a triangular mode, each positioning assembly comprises an adjusting rod, an ejector rod, a spring and a plug, a mounting hole is formed in the adjusting rod, one end of the mounting hole is provided with the ejector rod, and the other end of the mounting hole is provided with the spring. A plug is arranged at the other end of the mounting hole, and a spring is arranged between the ejector rod and the plug; supporting legs extending downwards and outwards are distributed on the lower face of the fixing lantern ring in a triangular mode. The device is simple in structure, small in size, not high in requirement for measurement space, and also suitable for measurement of plane measurement points in narrow space; two hands of a person can be liberated, the prism does not need to be held by hands, the horizontal position of the fixing lantern ring can be adjusted through the adjusting supporting legs, the position of the prism is accurate, the accuracy of measured data can be guaranteed, and the measuring accuracy cannot be affected by hand shaking or other external factors. The device is simple to manufacture, low in cost, light in weight and convenient to transfer during measurement.

The utility model relates to a welding tool for automobile door panel production, which comprises a top plate, and further comprises a supporting assembly and a positioning assembly which are arranged on the top plate, the supporting assembly comprises a supporting plate arranged on the top plate, a plurality of mounting holes are formed in the supporting plate in an embedded mode, internal threads are engraved in the mounting holes, and the supporting plate is arranged on the supporting plate through a first screw. Based on the fixing operation that the screw rod is matched with the supporting piece and the pressing piece, the door plank machining tool can be matched with different door planks to be machined, especially door planks with different shapes and a plurality of cambered surfaces, can effectively support the door planks, and avoids poor welding caused by deformation of the tool; the welding machine is provided with the auxiliary moving mechanism, based on multi-degree-of-freedom sliding and fixable structural arrangement, workers can be assisted in moving the welding machine, hand shaking and line changing caused by fatigue of the workers during long-time work are avoided, and therefore the welding effect is improved.

An electronic device (301) according to an embodiment comprises: an inertial sensor (310); a camera (320) including an image sensor; a processor (360); and a controller (330). The controller (330) is configured to, while a camera application is running, acquire the magnitude and direction of movements of the electronic device (301) caused by hand shaking on the basis of sensing data acquired through the inertial sensor (310). The controller (330) is configured to determine, on the basis of the magnitude and direction of the movements of the electronic device (301), a first area for acquiring an image within the entire area of the image sensor. The controller (330) is configured to acquire pixel values of pixels included in the first area. The controller (330) is configured to provide the acquired pixel values to the processor.

The invention discloses a stomatoscope for stomatology, and particularly relates to the technical field of stomatology, the stomatoscope comprises a handheld rod and a stomatoscope body, one side of the handheld rod is fixedly provided with an L-shaped rod, one end of the L-shaped rod is fixedly provided with a connecting rod, and the outer wall of the stomatoscope body is rotatably provided with a connecting shaft; one end of the connecting shaft is fixedly connected with the outer wall of the connecting rod, a moving assembly is movably installed in the handheld rod, an adjusting column is fixedly installed at the top of the moving assembly, and a telescopic rod is arranged in the mouth mirror body. According to the scheme, the problem that angle adjustment of an existing mouth mirror is difficult to control is solved, the mouth mirror can rotate independently, rotation adjustment of the whole device is not needed, the situation that a patient needs to open the mouth as much as possible is avoided, examination pain of the patient is relieved, rotation of the mouth mirror is slow and controllable, and the mouth mirror can be fixed when rotated to any angle; the situation that the angle needs to be fixed through fingers all the time is avoided, and detection problems caused by hand shaking are also avoided.

The utility model relates to the technical field of ink droppers, in particular to a porous dropper capable of uniformly dropping ink, which comprises an ink extraction box, a telescopic square groove is arranged in the ink extraction box, a lifting mechanism is fixedly arranged at the top end of the telescopic square groove, a driving mechanism is arranged at the front end of the lifting mechanism, and the driving mechanism comprises a rotating component. The rotating assembly is located on the front side of the lifting mechanism, the right side of the rotating assembly penetrates through the outer wall of the right side of the ink pumping box and is sleeved with the fixing box, the bottom end of the lifting mechanism extends to the top end of a dropper, and an ink dripping connector is fixed to the bottom end of the dropper in a threaded mode. Ink in the dropper can be pushed to be discharged through the sealing cover fixedly arranged at the bottom end, the efficiency is improved, use is convenient, ink is discharged more stably, hand shaking is avoided, the efficiency is improved, and detection is convenient; and ink dripping is carried out through the multiple ink dripping holes formed in the bottom end of the sleeving pipe, and the ink outlet efficiency is improved.

The application discloses an emergency backup multi-mode power generation device and a use method thereof, and belongs to the technical field of new energy and energy saving. The device comprises a rotating arm, a space crank slider mechanism, a pressing switch, a shell, a limiting platform arranged in the shell, a vibrating spring shaft, a vibrating spring, a pressing transmission mechanism, a base, a scissor type pressing mechanism, a T type sliding sleeve, a cylindrical linear motor and a central straight cylinder locking mechanism. The cylindrical linear motor is used as an energy collection device, and the power generation device integrates vibration power generation, hand power generation and pressing power generation. The device can collect the energy generated by vibration during human walking, and can realize the conversion of electric energy through hand shaking and pressing in an emergency. The device integrates multiple power generation modes, reduces the failure probability of a single power generation mode, and significantly improves the risk resistance and practicality. The switching mode of the multiple power generation modes also reduces the fatigue of the auxiliary power generation person. The volume is reasonably arranged, and the device is convenient to carry.

The utility model relates to collection equipment technical field, the utility model discloses a kind of internet-of-things label information collection equipment, including handle;Collector, be located at one end of the handle, for collecting label information;Folding telescopic stand, be installed on the handle, for supporting collector by the folding of the folding telescopic stand;The internet-of-things label information collection equipment, by this equipment, label collection can be handheld, also can be stably placed on desktop or fixed station, without operating personnel continuously holding, this reduces the influence of operating personnel hand shaking to collection process, to improve the accuracy and efficiency of data acquisition, the compact and light design of equipment makes operating personnel can easily carry out two-hand operation, without necessarily holding equipment with one hand, this improves overall operation efficiency, and the practicability and flexibility of equipment.

The utility model relates to the technical field of electrical switch operation, and discloses an integrated tool for power-off and power-on operation of power plant equipment, which comprises a fixing frame, the top end of the fixing frame is connected with an adjusting assembly, and the inner side of the fixing frame is connected with a clamping assembly; compared with the prior art, the power distribution cabinet has the advantages that when a worker operates the power distribution cabinet at a higher position, a tool can be prevented from sliding off due to accidental collision or hand shaking of the worker, and the tool is prevented from falling off to hurt the worker or damage other equipment; the safety of the integrated tool for the power-off and power-on operation of the power plant equipment is improved; the height of the tool can be adjusted according to the specific position of an equipment operation part, and the operation head can be easily inserted into the corresponding hole, so that the operation convenience of the integrated tool for the power-off and power-on operation of the power plant equipment is improved.

The utility model discloses a double-input planetary reducer convenient for hand-cranking debugging, which relates to the technical field of reducers and comprises a rear flange, an input shaft, a front flange, an output shaft, a planetary reduction structure and a worm and gear structure, the input shaft is rotatably mounted on the inner side of the rear flange, the front flange is fixedly mounted on one side of the rear flange in the length direction, and the output shaft is fixedly mounted on the other side of the rear flange in the length direction. The output shaft is rotationally installed on the inner side of the front flange, and the planetary speed reduction structure and the worm and gear structure are both installed on the inner side of the front flange. According to the double-input planetary reducer convenient to debug by hand cranking, the planetary reduction structure can be disassembled and maintained by disassembling the rear flange and the front flange, the operation is flexible, and the use is relatively simple and convenient; after the planetary speed reduction structure is installed, the output shaft can be driven to operate through the arranged worm and gear structure, so that the circumferential point position of the output shaft is finely adjusted in a hand-cranking mode when the output shaft is connected with other equipment, the equipment installation and debugging efficiency is effectively improved, more time is saved, and the working efficiency of the speed reducer is guaranteed.

The invention provides a reinforcement cage forming device which comprises a mounting base, two annular tables, two sliding bases and two clamping assemblies, the two annular tables are arranged at the top of the mounting base at intervals in the horizontal direction and are oppositely arranged, the end faces of the annular tables are provided with containing sleeves used for containing main reinforcements, and the multiple containing sleeves are arranged in the circumferential direction of the annular tables; the two sliding seats are arranged at the top of the mounting seat and located on the two sides of the annular tables correspondingly, and the sliding seats are slidably connected with the mounting seat in the interval direction of the two annular tables; the two clamping assemblies are arranged at the tops of the two sliding seats in a one-to-one correspondence mode, and each clamping assembly is provided with two clamping jaws used for clamping the outer stirrup or the inner stirrup. According to the reinforcement cage forming device provided by the invention, displacement and deflection of the outer stirrup or the inner stirrup caused by hand shaking or external force influence can be eliminated, and the perpendicularity and fitting degree of the outer stirrup or the inner stirrup and the main reinforcement are ensured, so that the overall quality of a reinforcement cage is improved.

The present invention discloses an optical element driving mechanism, which includes an upper cover, an upper reed, a magnet group, a carrier, a lower reed, a base, a ball, a bottom circuit board and a base. The upper reed movably connects the carrier to the upper cover, and the lower reed movably connects the carrier to the base. The bottom circuit board is installed on the base and fixedly connected to the base. The base is used to install a chip and is movably connected to the base through a ball. Among them, the carrier is provided with a first set of coils, the bottom circuit board is provided with a second set of coils, and the magnet group is fixedly installed on the upper cover and cooperates with the first set of coils to drive the movement of the carrier and cooperates with the second set of coils to drive the movement of the base. The present invention realizes optical zoom and optical anti-shake through the movement of different components, and solves the problem of photo blurring caused by hand shaking during shooting.

The present invention provides an electric hand crank, comprising a crank body, a shell movably mounted on the outside of the middle of the crank body and symmetrically, the crank body comprising a hand crank hook and a thick tube, an electric drive device is mounted inside the shell, the electric drive device comprises a movably mounted motor, a transmission mechanism, and an electric module, the transmission mechanism comprises a first bevel gear on the outer surface of the inner thick tube of the shell, a second bevel gear at the end of the motor output shaft, the electric module comprises a battery, a power control circuit board and a main circuit board stuck on the inner side of the shell, and the electric drive device also comprises a positioning mechanism. The electric hand crank described in the present invention can meet the needs of different working states, is relatively labor-saving, and has high working efficiency, can avoid the hand crank hook from working when not in use, is relatively safe to use, can change the length of the crank, and is suitable for different working scenes.

The utility model relates to the technical field of automobile accessory mounting equipment, in particular to buckle mounting equipment for an automobile cup holder. The device comprises a mounting table, a fixing seat is arranged in the middle of the top of the mounting table, a vehicle cup holder is placed on the fixing seat, a plurality of buckle mounting openings are formed in the periphery of the outer wall of the vehicle cup holder, a plurality of fixing plates are arranged on the mounting table, and each fixing plate is provided with a second telescopic cylinder. The plurality of second telescopic cylinders are respectively arranged in the vertical mounting direction of the plurality of buckle mounting openings, and profiling buckle moulding beds are arranged at the tops of telescopic rods of the second telescopic cylinders. According to the utility model, the first telescopic cylinder drives the pressing bottom plate and the rubber head pressing rod to accurately position the vehicle cup holder, and the second telescopic cylinder is matched with the profiling buckle moulding bed, so that the buckles can be accurately arranged in the buckle mounting openings around the wall of the vehicle cup holder; buckle installation deviation caused by hand shaking or visual errors in the manual assembly process is effectively avoided, the product assembly precision is greatly improved, and the overall quality of the automobile cup stand is guaranteed.

An operating system for an endoscopic retrograde cholangiopancreatography (ERCP) surgical robot includes: an operating table, where a patient lies on the operating table; an endoscopic actuation end device; an endoscopic accessory operation end device; a console, including an operating handle, a foot switch, and a three-dimensional (3D) handle; and a display screen for human-computer interaction. A forceps lifter control module, a knob control module, a catheter drive module and a water vapor suction control module on the endoscopic actuation end device are controlled through the operating handle, the foot switch, the 3D handle and the touch screen on the console. A guide wire drive module on the endoscopic accessory operation end device remotely controls the insertion and feeding of a guide wire or catheter to complete the surgery. The operating system reduces the harm caused by long-term surgical radiation to operators and avoids hand shaking of doctors during operation.

The present invention relates to the technical field of watches, and discloses an ultra-thin watch, including a mounting ring, the inner wall of the mounting ring is installed with a rubber plate, the top of the mounting ring is connected to a top cover, the bottom of the mounting ring is connected to a bottom cover, the top surface of the bottom cover is connected to a circuit board, the inner wall of the rubber plate is connected to a display, and the top surface of the circuit board is connected to the bottom surface of the display through a conductive rubber strip; it also includes a protective device for protecting the display; a switching device for actively switching the protection mode; and a dustproof device for preventing dust from entering the top cover. Through the provision of the protective device, when the user's hand shakes significantly, the two protective plates can automatically close to protect the display, so as to avoid the display from being damaged due to collision while following the hand movement. When the user's hand stops shaking, the two protective plates automatically open without affecting the observation time.

The utility model discloses a modular stage of caster can hand shake lift, its structure includes mesa, stand, mounting bracket, worm screw elevator, take brake caster and hand wheel, wherein the mesa bottom four corners and long side center are equipped with stand respectively, and every stand bottom end is equipped with adjustable support foot respectively, and the adjacent stand between is connected with the connecting plate respectively, and the opposite two connecting plates between the length direction both ends of mesa below are installed with mounting bracket respectively, and every mounting bracket is installed with a worm screw elevator respectively near both ends, and the bottom lifting end of every worm screw elevator is connected with a take brake caster respectively. The utility model discloses the advantage: convenient single -person operation, set up the caster of manual control lift under the stage, when needing to remove position, can lower the caster and contact ground, make support foot leave ground, remove to the stage, when the stage reaches the position required, then can manual control caster and rise and leave ground, make support foot contact ground, realize steady support, improve security.

The utility model relates to the field of mold maintenance, in particular to a mold sand blasting machine convenient to use, which comprises an operation bin and a sand barrel, two gloves are arranged on the surface of the operation bin, a spray gun is arranged in the operation bin, a workbench is arranged in the operation bin, a gap is arranged between the workbench and the bottom of the operation bin, a bearing is wrapped on the surface of the workbench, and a connecting rod is arranged at one end of the bearing. According to the mold sand blasting machine, the auxiliary mechanism is installed, auxiliary lifting can be conducted on the hand of a gun when the gun is held for sand blasting work, the fatigue feeling caused by long-time hanging and hand shaking is reduced, the mold sand blasting uniformity is improved, meanwhile, the use comfort of an operator is improved, and the adjustable workbench is installed, so that the mold sand blasting machine is convenient to use. And a mold can be placed on the workbench for sand blasting, and a traditional mode that an operator holds the mold for a long time for sand blasting is not needed, so that the labor amount of the operator is reduced, and the use convenience and comfort are improved.

The utility model relates to the technical field of pacemaker wire offset distance measuring equipment, and provides an attachable ruler device which comprises release paper and a transfer sticker, the transfer sticker is pasted on the release paper, the transfer sticker is used for being pasted on dressing on a pacemaker wire, the transfer sticker comprises a transverse scale part, and the transverse scale part is provided with a plurality of scales. The transverse scale part comprises a plurality of transverse scale lines which are arranged at intervals along a straight line, and the transverse scale part is used for measuring the displacement distance of a lead of the pacemaker. According to the utility model, through the arrangement of the transfer paste capable of transferring the transverse scale part to the dressing, the transfer paste is clearer and more difficult to erase compared with marking on the dressing, and when the lead offset distance of the pacemaker is measured, a user does not need to hold the graduated scale by hand and can directly observe the lead offset distance through the transverse scale part on the dressing, so that errors caused by hand shaking during measurement are avoided.

The application relates to the technical field of cameras, and provides an optical lens, a camera and electronic equipment, which can solve the problem of poor imaging quality of a camera in the related art when a photographer's hand shakes. The optical lens comprises a front lens group and a rear lens group arranged in the direction from an object side to an image side; the front lens group comprises a first light path turning element and at least one positive lens located on the object side of the first light path turning element, the at least one positive lens has a first optical axis, the rear lens group has a second optical axis, the first light path turning element has a first reflection surface; the second optical axis comprises an optical axis segment, an end point of the optical axis segment is located on the first reflection surface, and the optical axis segment extends to the image side of the first reflection surface; the front lens group is an anti-shake compensation lens group and can swing around a first rotation center axis; the first rotation center axis intersects the optical axis segment or is located close to the optical axis segment. The application can be used on electronic equipment such as mobile phones.

The utility model belongs to the technical field of package printing, and relates to an automatic alignment device for package printed matters, which comprises a bottom support frame, a sliding frame is mounted in the middle of the top end of the bottom support frame, the sliding frame is respectively connected with a first horizontal driving module and a second horizontal driving module in a sliding manner, and an alignment component is mounted on the first horizontal driving module. The high-frame vision sensor is used for scanning edge feature points of a paperboard and comparing the edge feature points with stamping points of stamping equipment, the driving part is used for driving the driving lead screw to rotate, the threaded driving block drives the adjusting plate and the adsorbed paperboard to move in the Y-axis direction, and the first horizontal driving module is combined to drive the alignment assembly to move in the X-axis direction as a whole. Compared with traditional manual alignment which depends on experience and proficiency of an operator, the automatic alignment device has the advantages that relative position deviation of the paperboard and the mold caused by slight hand shaking or visual deviation of the operator is avoided, and consistency of positioning each time is guaranteed.

The invention provides laser welding equipment for an electric vehicle controller, and belongs to the technical field of laser welding equipment. Comprising a welding machine body, a supporting base is installed on a workbench of the welding machine body, four supporting columns are fixedly connected to the outer wall of the top of the supporting base, the four supporting columns are symmetrical pairwise, a first receding round hole and a first sliding groove are formed in the two sides of the outer wall of the top of the supporting base correspondingly, and the two supporting columns close to the first sliding groove are connected with the first receding round hole. First limiting plates are fixedly connected to the top ends of the supporting columns, and second limiting plates are fixedly connected to the outer walls of the top ends of the two supporting columns close to the first receding round hole; the fixing assembly is used for fixing the inductance coil and connected with the supporting base. Through the arrangement of the fixing assembly, the inductance coil can be fixed during laser welding, a worker does not need to cooperate with a jig for fixing with hands, and welding dislocation caused by the fact that the welding precision is affected by hand shaking is avoided.

The utility model relates to a gasket cutting structure which comprises a main body unit, a placing unit, a locking unit, an adjusting unit, a cutting unit and a control unit. The rubber gasket cutting device has the advantages that the main body unit, the placing unit, the locking unit, the adjusting unit, the cutting unit and the control unit are used in cooperation to adjust the cutting position, cutting of rubber gaskets of different shapes and sizes is achieved, and the manufacturing requirements of various sealing gaskets can be met; the rubber gasket is fixed by matching with the locking unit, so that the cutting position is accurate, frequent manual operation like using scissors and a paper cutter is not needed, the manufacturing time is greatly shortened, the cutting deviation caused by factors such as hand shaking during manual cutting can be effectively avoided, and the dimensional precision of the manufactured rubber gasket is higher.

1. The name of the design product: coffee grinder (hand shaking type). 2. The use of the design product: coffee grinder. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention relates to the technical field of hand tremor suppression equipment, and discloses a wearable hand tremor suppressor, which comprises an arm pad fixed on the top surface of a forearm through a bandage, and a glove worn on a hand, and further comprises a shell fixed on the top of the arm pad; the inner box is arranged in the shell; the left baffle and the right baffle are vertically arranged in the inner box in parallel; the floating plate is movably arranged between the left baffle and the right baffle, and the left side and the right side of the floating plate are supported through positioning springs; the traction rod is fixedly installed on the side, facing the glove, of the floating plate, and the tail end of the traction rod penetrates through the left baffle and then is connected with a pull rod through a displacement amplifier. According to the wearable hand shake suppressor, through the cooperative design of the floating plate and the positioning spring, the supporting force provided by the positioning spring can be used for elastically limiting the floating plate, then the tremor motion of the hand is effectively absorbed and buffered, real-time suppression of hand shake is achieved, and the hand shake amplitude is reduced.

The utility model discloses a rapid quantitative detection kit for detecting prostate small body leaked protein, which belongs to the technical field of prostate small body leaked protein detection and comprises a kit inner box, a kit outer box is arranged on the outer side of the kit inner box, and a sealing plate is arranged on the inner side of the kit outer box. According to the utility model, through the unique design of the adjusting plate, a detector can flexibly rotate the adjusting plate according to the amount of a required solution, so that the discharge port is accurately connected with the corresponding discharge chute, and when the solution is added to a position flush with the discharge chute, the redundant solution automatically flows out from the discharge port to the outer kit for temporary storage; therefore, the problem of inaccurate solution measurement caused by factors such as human visual errors or hand shaking in a traditional measurement mode is effectively avoided, high accuracy of the solution amount added each time is ensured, a solid foundation is laid for the accuracy of detection of the prostate small body leaked protein, the reliability and repeatability of a detection result are remarkably improved, and the method is suitable for popularization and application. And detection errors caused by solution amount deviation are reduced.

The electric push rod comprises a shell, a driving mechanism, an outer pipe, a push rod assembly and a first limiting switch, the outer pipe is fixedly connected to the outer side of the shell, a guide groove is formed in the inner side wall of the outer pipe in the length direction, and the push rod assembly is arranged in the outer pipe and is in sliding fit with the inner side of the outer pipe; the input end of the push rod assembly extends into and is fixed into the driving mechanism, the first limiting switch is electrically connected with the driving mechanism and is fixed to the push rod assembly, and the top of the first limiting switch is clamped into the guide groove. The first limiting switch moves leftwards in the sliding groove along with the push rod mechanism until the triggering end of the first limiting switch extrudes the inner wall of the left side of the outer pipe and triggers the first limiting switch, the first limiting switch controls the driving mechanism to be closed, the pushing assembly is prevented from excessively retracting in the outer pipe, the outer pipe is protected, and the service life of the electric push rod is prolonged.