98results about How to "Increase functional diversity" patented technology

The invention provides an intelligent garden environment monitoring data analysis method and system. Sensors are deployed to collect temperature, humidity and other data in real time to form a data set. Analyzing an environment parameter change mode of each region by adopting a time sequence clustering algorithm, and determining characteristics and trends; and carrying out dimension reduction on the data by using a multi-dimensional scale transformation algorithm to a three-dimensional space for visualization, and generating an environment state map. And evaluating the plant fitness in combination with a plant physiological ecology knowledge base, and generating a scoring matrix to guide the preliminary layout scheme. And dynamically adjusting the layout by applying reinforcement learning, selecting an optimal scheme, and predicting a future environmental evolution path based on the optimal scheme and historical data. An automatic control system framework is constructed, a self-adaptive control algorithm is designed, intelligent regulation and control of plant layout are realized, garden management efficiency is improved, and ecological protection and sustainable development are promoted. Therefore, full-chain intelligent management from environment monitoring to plant layout optimization is realized, and the intelligent level of garden environment monitoring and management is remarkably improved.

The invention discloses a homework correction method based on image recognition and a large language model, relates to the field of teaching, solves the problem of insufficient practicability of a homework correction method, and comprises the following steps: S1, obtaining a plurality of homework texts and a plurality of answer texts to obtain homework preliminary collection data, s2, dividing the plurality of homework texts into a first type of homework texts and a second type of homework texts, and correcting the first type of homework texts and the second type of homework texts to obtain homework correction data, s3, performing answer correctness analysis on the homework submitted by the target student to obtain a first homework quality evaluation coefficient and a second homework quality evaluation coefficient to obtain correctness analysis data, and S4, performing quality evaluation on the homework submitted by the target student in the current batch by analyzing the correctness analysis data. According to the homework correcting method, the function of the homework correcting method can be expanded, and the practicability is further improved.

The utility model provides a mechanical drainage shower device which comprises a water mixing device which comprises a water inlet end and a water outlet end, the water inlet end is connected with a cold water pipeline and a hot water pipeline, the water outlet end is connected with a main pipeline, and the main pipeline comprises a drainage branch and a plurality of water outlet branches. The pre-drainage device comprises a drainage valve, a water outlet valve, a drainage port, a drainage channel and a water outlet channel, the drainage channel and the water outlet channel are communicated with the drainage branch and the drainage port respectively, the drainage valve is used for controlling opening and closing of the drainage channel, and the water outlet valve is used for controlling opening and closing of the water outlet channel; the shell, the water mixing device and the pre-drainage device are both arranged in the shell, the shell is provided with a water outlet button used for controlling the water outlet valve, a pre-drainage switch and a plurality of shower switches, the pre-drainage switch and the shower switches are respectively used for controlling the water outlet branch and the water outlet branches to be opened and closed, and the water outlet branches and the water outlet are respectively connected to corresponding showers. Therefore, cold water pre-drainage of the shower device can be achieved through the mechanical switch, and the adaptability of the shower device to old users is improved.

The invention relates to the technical field of farming machinery, in particular to a multifunctional mini-tiller which comprises a rotary tillage tool bit and a switching mechanism, the rotary tillage tool bit is rotationally installed on a machine body and comprises a driving shaft and two rotary tillage tool sets, the driving shaft is in transmission connection with an engine, and the rotary tillage tool sets are symmetrically installed at the two ends of the driving shaft; the rotary blade group comprises a plurality of blades which are arranged in the annular direction of the driving shaft, handle parts of the blades are provided with inserting grooves, the switching mechanism comprises a plurality of limiting parts which are arranged corresponding to the blades, when the limiting parts are inserted into the corresponding inserting grooves, the corresponding blades are locked for rotary tillage work, and when the limiting parts are separated from the inserting grooves, the corresponding blades are adjusted in a floating mode. According to the invention, through the cooperation of the rotary tillage tool bit and the switching mechanism, the effect of flexibly adjusting the working state of the blade under different working conditions is achieved, the obstacle is effectively avoided, the damage risk of equipment is reduced, the maintenance cost and the downtime are reduced, and meanwhile, the safety of operators is also ensured.

The invention relates to the technical field of wetland ecological environment management, and discloses an ecological environment intelligent patrol monitoring system and method based on machine vision. The system comprises a wetland ecological environment air characteristic information display module, a tourist target wetland ecological vacation position positioning module and a tourist target wetland ecological vacation position route planning and navigation module. Coordinate information of a tourist target wetland ecological monitoring point is accurately collected through a position sensor, and coordinate information of a tourist target wetland ecological vacation optimal position in a wetland ecological vacation scenic area is intelligently analyzed in combination with a geographic information system. According to the method, the coordinate information of the wetland ecological vacation position of the tourist target is scientifically and accurately positioned based on the environment air characteristic parameters of the tourist target, and the functional diversity of environment management of the wetland ecological vacation scenic spot is improved.

The invention relates to the technical field of automobile part machining control, and discloses an automobile part production monitoring method and system, and the system comprises an automobile part machining welding spot feature recognition module, an automobile part machining welding spot state analysis module, and an automobile part spot welding process parameter adjustment module. According to actual coordinate parameters and theoretical coordinate parameters of the body-in-white part machining welding spots, coordinate error parameters of the body-in-white part machining welding spots and theoretical position adjusting coordinate parameters of the body-in-white part machining welding spots are accurately measured by combining numerical analysis; digital metering of spot welding machining position errors and spot welding machining theory adjusting coordinates of automobile body-in-white parts is achieved; and the automobile part generation monitoring end performs automobile part machining welding spot position parameter adjustment operation in a self-adaptive manner based on the body-in-white part machining welding spot theoretical position adjustment coordinate parameters in combination with the industrial robot control end and the spot welding machining equipment.

The invention discloses a high-precision cutting tool for civil air defense door production and a using method thereof, and belongs to the technical field of civil air defense door machining. The high-precision cutting tool comprises a rack, a clamping tool mechanism is arranged on the rack, two mounting frames are fixed to the upper surface of the rack, and the two mounting frames are oppositely arranged in a front-back mode; a front-back movement mechanism is arranged between the two mounting frames; a motor and a square plate are used in cooperation with a hinge arm, so that four side clamping plates can synchronously move inwards and outwards, centering clamping and fixing of the civil air defense door steel plate are achieved through synchronous inward movement, a top clamping plate is used in cooperation with a first wedge-shaped plate and a second wedge-shaped plate, and the top clamping plate synchronously moves downwards when the side clamping plates move inwards; therefore, top pressing and clamping, synchronous fixing in four directions and longitudinal pressing and fixing are achieved while side clamping is achieved, the phenomenon of position deviation and dislocation of the civil air defense door steel plate is effectively avoided, the accuracy of cutting operation is improved, and the defective rate is reduced.

The invention provides an earphone, and relates to the technical field of wearable equipment. The earphone comprises an earphone head and an ear clip, wherein the earphone head and the ear clip are connected with each other and jointly clamp a helix; in a wearing state, the earphone head is located at the front side of the ear part and extends towards the auricular conchae cavity, and the ear clip bypasses the region, opposite to the auricular conchae cavity, of the helix, so that the end part, deviating from the earphone head, of the ear clip is located at the rear side of the ear part; the earphone head comprises a first shell, a camera shooting hole and a camera shooting unit, and the camera shooting hole is formed in the first shell and is communicated with an inner cavity of the first shell; the camera shooting unit is arranged in the first shell, and the camera shooting unit is configured to acquire images and / or videos in the external environment through the camera shooting hole. The earphone provided by the invention also has a shooting function on the premise of giving consideration to the function of listening to music or calling, so that the functional diversity of the earphone is improved.

The invention discloses an additive manufacturing device which comprises an air guide slip ring, a rotary nozzle, an air pump, a servo motor, a charging barrel and a control system, the air guide slip ring comprises a fixed part and a rotary part, the fixed part is of a hollow columnar structure, the rotary part comprises a ventilation end and a material receiving end, the ventilation end is rotatably inserted into the hollow interior of the fixed part, and the material receiving end is connected with the rotary nozzle. A plurality of annular grooves are formed in the outer side face of the ventilation end, air guide holes are formed in the annular grooves, a plurality of independent annular cavities are defined by the annular grooves and the inner side wall of the fixing part jointly, a plurality of communicating holes used for being communicated with an air pump are formed in the outer side of the fixing part, and a plurality of ventilation holes are formed in the material receiving end. Each vent hole is communicated with different annular cavities through an air guide channel, and the rotary nozzle is fixedly connected with the material receiving end. The soft robot of a programmable spiral structure can be printed, and meanwhile the problem that pipelines such as air pipes and electric wires are wound in the printing process is solved. The invention further provides a using method of the additive manufacturing device.

The lamp strip storage device comprises a handle frame and a winding reel, the handle frame comprises a handle body, a first positioning ring and a second positioning ring, the first positioning ring and the second positioning ring are installed at the two ends of the handle body respectively and are coaxially arranged, and the winding reel comprises a winding shaft, a first stopping plate and a second stopping plate, and the first stopping plate and the second stopping plate are located at the two ends of the winding shaft respectively. The first stop plate is rotatably mounted on the first positioning ring, and the second stop plate is rotatably mounted on the second positioning ring, so that a user can store the lamp strip into the winding reel by rotating the winding reel, and the lamp strip wound on the winding shaft can be protected by arranging the first stop plate and the second stop plate; according to the lifting handle frame, the winding reel is fixed through the first positioning ring and the second positioning ring, and the lifting handle frame and the winding reel define a closed ring body, so that the lamp strip stored on the winding reel can be prevented from accidentally loosening and falling off.

A new type of combination table, including table body, the table body includes table top, table body, the table top includes the first table top, the second table top, the arc table top, the first table top one angle is equipped with the first shaft sleeve, the second table top one angle is equipped with the second shaft sleeve, and the second shaft sleeve is connected with the second table top through the connecting shaft; the first table top and the arc table top are connected through the movable element. When using, the table body can be placed in different shapes according to actual conditions, for example, the first table top and the second table top are spliced in the form of a long strip; the second table top is rotated by 90 degrees and connected through the arc table top, so that the table body is arranged in the form of an L shape; the second table top is rotated by 180 degrees, and the second table top is spliced with the first table top, which is convenient for multiple people to sit around, suitable for multiple people to have a meal, and through flexible combination, space utilization is optimized, function diversity is enhanced, and scene adaptation is promoted.

The utility model relates to the technical field of orthotics, and discloses a multifunctional knee joint orthotics which comprises an upper fixing ring, a lower fixing ring, a first supporting rod and a second supporting rod, the first supporting rod and the second supporting rod are fixedly connected to the side wall of the upper fixing ring and the side wall of the lower fixing ring respectively, one end of the first supporting rod is rotationally connected with one end of the second supporting rod, and the other end of the first supporting rod is rotationally connected with the other end of the second supporting rod. Linings are installed on the inner side of the upper fixing ring and the inner side of the lower fixing ring, a plurality of through holes used for conducting heat dissipation on the skin surface of the leg are formed in the side walls of the linings, a control box is arranged on the upper fixing ring, and an air inlet assembly used for feeding air into the through holes is arranged in the control box. According to the multifunctional knee joint orthosis, the comfort level of a user is improved, the risk of skin problems is reduced, and the health state of the skin near the knee joint is protected.

This utility model discloses a push-out sliding card holder, including a sliding card holder bottom shell and a sliding card holder top shell. The top of the sliding card holder bottom shell has a receiving cavity, and one side of the receiving cavity has an opening. The sliding card holder top shell is installed inside the receiving cavity. Limiting slide rails are provided at both the front and rear ends of the receiving cavity along the length direction. First side panels are provided at both the front and rear ends of the bottom of the sliding card holder top shell along the length direction. This utility model uses the sliding card holder bottom shell and sliding card holder top shell to store stacked cards in the receiving cavity of the sliding card holder bottom shell. When retrieving a card, by pushing the sliding card holder top shell forward, the second side panel can drive the card closest to the sliding card holder top shell to move synchronously, pushing the card out of the receiving cavity. Then, the sliding card holder top shell is pushed back to its original position, and under the action of the spring piece, it pushes against the bottommost card, so that the cards can be pushed out and removed by the sliding card holder top shell in sequence, completing the card retrieval operation.

The utility model discloses a kind of surface treatment equipment for alloy ball tooth processing, belong to alloy ball tooth processing technical field, including base, fixedly installed with fixed motor in the base, the output shaft end portion of fixed motor is fixedly installed with disc, several inclined slides are opened in the disc, and rolling installation is carried out in inclined slide, and the roller is rolled in the inclined slide, several straight slides are opened in the upper surface of base, and sliding block is slidably installed in straight slide, the roller is rotatably installed in the lower surface of sliding block, the upper surface of sliding block is fixedly installed with fixed thimble;By setting disc cooperation roller and sliding block and fixed thimble use, the rotation of disc cooperation roller drives four sliding blocks to move synchronously inward or outward, and then four fixed thimbles are used to realize the four-way positioning of workpiece, improve the stability of fixed effect, avoid the phenomenon of fixed shaking, ensure that subsequent ball tooth surface processing operation accuracy is good.

The invention relates to the field of tile conveying equipment, in particular to a multifunctional tile conveyor which comprises a supporting bottom plate, a vertical plate is arranged on the rear portion of the upper end face of the supporting bottom plate, and a conveyor is arranged on the front portion of the upper end face of the supporting bottom plate. According to the tile conveyor, the functions of feeding, guiding, positioning and transporting are integrated, the functional diversity of equipment and the conveying efficiency of batch tiles can be effectively improved, meanwhile, the tile feeding stability and protection performance can be effectively improved in the mode that the tiles are supported and fed from bottom to top, and the tile conveying efficiency is improved. And by means of bearing type conveying of the three sets of conveying belts, the protection performance of the tiles during conveying can be effectively improved, and therefore the efficiency of follow-up batch conveying of the tiles is improved.

The invention relates to the technical field of measuring tools, provides a digital display angle leveling instrument capable of being attached to a wall surface for use and a working method of the digital display angle leveling instrument, and solves the problems of difficulty in observation, multiple attempts, difficulty in accurate adjustment and the like when a traditional leveling instrument is used on the wall surface. The leveling instrument comprises a leveling instrument body, an angle ruler, an angle display screen, waterproof glue and an auxiliary positioning and fine tuning mechanism. The auxiliary positioning and fine adjustment mechanism is composed of an auxiliary positioning assembly and a fine adjustment assembly, and rapid positioning and accurate adjustment of the leveling instrument on the wall can be achieved. The auxiliary positioning assembly comprises an up-down sliding block, a main body and a connecting mechanism, and multi-dimensional adjustment is achieved through flexible design. The fine adjustment assembly comprises an arc-shaped kidney-shaped hole and an adjusting piece, and fine angle adjustment can be conducted. The angle ruler is further provided with an innovative rotating arm and fan disc design, so that the angle ruler can be flexibly operated in the state that the leveling instrument is attached to the wall. The working method comprises the steps of preparation, preliminary positioning, fine adjustment operation, final fixing and the like, and high precision and reliability of measurement are ensured.

The invention provides a laser machining head. The laser machining head comprises a base, a zooming module and a driving module. The base is provided with a light inlet and a light outlet, the light inlet is used for receiving laser, and the base further forms a containing cavity in a surrounding mode; the zoom module comprises a mounting seat, a short-focus lens group and a long-focus lens group, the short-focus lens group and the long-focus lens group are both fixed on the mounting seat, the short-focus lens group and the long-focus lens group are arranged along a first direction, and the first direction is perpendicular to the direction from the light inlet to the light outlet; the driving module is used for driving the zooming module to move in the first direction, so that the laser processing head is switched between a short-focus state and a long-focus state; wherein in the short-focus state, the short-focus lens group corresponds to the light inlet, and the short-focus lens group is used for receiving and guiding laser incident from the light inlet to exit; and in the long-focus state, the long-focus lens group corresponds to the light inlet, and the long-focus lens group is used for receiving and guiding the laser incident from the light inlet to exit. The invention further provides laser processing equipment applied to the laser processing head.

The utility model relates to the technical field of medical rehabilitation equipment, and discloses leg rehabilitation exercise equipment which comprises a base, a seat and a leg exercise assembly, the seat is arranged on the base in a lifting mode, a sliding rail is arranged at the position, located at the front end of the seat, of the base, an exercise base is arranged on the sliding rail in a sliding mode, and the leg exercise assembly is integrated on the exercise base. The leg exercise assembly comprises a bending and stretching exercise unit for achieving leg bending and stretching actions, a rotating exercise unit for simulating leg rotating movement and a resistance training unit for conducting stretching exercise on muscle groups in the legs. The leg rehabilitation exercise effect of the equipment is improved.

The application discloses a headset and a control method and a storage medium thereof, and relates to the technical field of headsets. The headset comprises a head main beam, two headset bodies which are detachably connected to the head main beam, any one of the headset bodies comprising: an audio component for generating sound; a heating component for generating heat; a control module electrically connected to the audio component and the heating component; the control module is used for enabling the heating component when the headset body and the head main beam are in a detached state, so that the headset body is in a hand warming mode; and the control module is used for enabling the audio component when the headset body and the head main beam are in an assembled state, so that the headset body is in an audio mode. The application improves the functional diversity of the headset.

The invention relates to the technical field of automobile part stamping equipment, in particular to a multifunctional automobile part stamping device and a using method thereof.The multifunctional automobile part stamping device comprises a fixing base used for supporting, and four sets of fixing guide rods are arranged on the inner end face of the fixing base at equal intervals; and guide sliding shafts are fixedly arranged at four corners of the upper end surface of the fixed base. By arranging the stamping device, the discharging device and the material guiding device, when automobile parts are stamped, the automobile parts can be subjected to integrated feeding, stamping, ejection and discharging operation, the functional diversity of the equipment is effectively improved, meanwhile, the automation degree of the equipment is also improved, and the production efficiency is improved. And therefore, the stamping machining efficiency of the equipment on the automobile parts is improved.

The utility model relates to the technical field of vehicle-mounted electronic equipment, especially relates to a rod-shaped interactive intelligent vehicle-mounted terminal, including terminal main body, it is the core processing and control center installation carrier of entire vehicle-mounted terminal, the interface module is integrated to one side of terminal main body, is used for realizing the access and data interaction of external equipment, the two sides of interface module on terminal main body are provided with mounting ear along the axis symmetry of terminal main body, and mounting hole is set up on mounting ear, is used for cooperation fastener and realizes the fixation of terminal and vehicle-mounted structure, the interface module outside symmetry is provided with connecting assembly, and connecting assembly is provided with connecting rod, connecting rod is outwardly extended in the rod shape, and the end is cooperated and is installed with interactive device, is used for receiving user operation instruction and will instruction transmission to terminal main body, realizes the two -way interaction of user and terminal, the utility model is applicable to the vehicle-mounted intelligent upgrading demand of various passenger cars, commercial vehicle, provides stable, convenient vehicle-mounted interactive experience for the user.

The plier head structure comprises an electric plier machine body, a fixed plier arm is fixedly connected to the upper end of the electric plier machine body, a gear driving crank is installed in the position, close to the upper end, of the electric plier machine body, and a movable plier arm is fixedly connected to the upper end of the gear driving crank. And tong heads are mounted on the fixed tong arm and the movable tong arm. According to the utility model, different marking requirements can be met by rapidly replacing different plier heads, the functional diversity of the livestock electric plier is effectively improved, the use flexibility of the electric plier is improved, and the application range of the electric plier is effectively expanded.

The invention relates to the field of elevator maintenance equipment, and discloses a finger robot which comprises a movable base, a robot body and a control system. The fixing mechanisms are arranged on the two sides of the movable base and used for fixing the position of the robot with the determined position; the lifting mechanism is arranged at the top of the movable base and used for lifting the height of the object; the extension clamping mechanisms are arranged on the two sides of the lifting mechanism and used for forcibly opening the elevator door when the elevator door is opened and closed abnormally; and the simulation manipulator is arranged at the top of the lifting mechanism and is used for simulating human fingers to interact with the elevator keys. And through cooperation of the fixing mechanism and the damping mechanism, the equipment can have the damping protection capacity while being suspended and fixed. And compared with a single fixing mode in the prior art, the device has the advantages that the influence of external impact on the device is reduced, and the applicability and reliability of the device are effectively improved.

This utility model discloses a multifunctional storage basket, which includes a back panel, a bottom panel, and a front panel. The back panel is movably connected to the rear end of the bottom panel, and the front panel is movably connected to the front end of the bottom panel. The upper sides of the back panel are symmetrically provided with first guardrail connecting parts, and the upper sides of the front panel are symmetrically provided with second guardrail connecting parts. A connecting guardrail strap is movably connected between the first and second guardrail connecting parts. When in use, it forms a stable storage space; when not in use, it can be folded flat for easy storage and carrying. The connecting guardrail strap and its positioning structure provide an upper barrier to prevent items from tipping over or slipping. The back panel has a handle hole and a wall-mounting hole, allowing for both portable transport and wall-mounting. The front panel has a slot and a placement slot for securely placing items such as ironing machines, enhancing its versatility.

The utility model relates to the technical field of magnet processing, and discloses a positioning device for processing a magnet fixing seat, which comprises a baffle plate, the inner wall of the baffle plate is fixedly connected with a support frame, the inner wall of the support frame is fixedly connected with a motor I, the output end of the motor I is connected with a support plate, the support plate is internally provided with a sliding chute, and the sliding chute is fixedly connected with the baffle plate. A fixing block is fixedly connected to the upper surface of the bottom plate, a sliding block is slidably connected to the outer wall of the fixing block, a rotating column is rotatably connected to the inner wall of the sliding block, the outer wall of the rotating column is arranged on the inner wall of the sliding groove, a clamping block is fixedly connected to the upper surface of the sliding block, and a fixing assembly is arranged on the upper surface of the baffle. The fixing assembly is used for fixing the electric push rod. According to the utility model, the supporting plate is driven to rotate by the motor I, so that the machining requirements of magnets with various shapes and sizes can be better met, and the effects of improving the universality and the application range of the fixed magnets are improved.

The invention relates to the technical field of metal material surface treatment, in particular to an industrial aluminum profile corrosion-resistant surface treatment process which comprises the following operation steps: S1, primary cleaning: putting a to-be-treated aluminum profile into a pretreatment device by a carrying device for primary cleaning; s2, water washing is conducted, specifically, the aluminum material subjected to preliminary cleaning is transferred to an agent removing device through a carrying device, and residual chemical substances are removed; s3, anodic oxidation is conducted, specifically, the washed aluminum material is transferred to an electrolysis device through a carrying device, and an anodic oxidation reaction is started by adjusting proper voltage and time parameters; s4, strengthening is conducted, specifically, the nanometer treatment device is started while the aluminum material subjected to anodic oxidation is moved out of the electrolysis device, and it is ensured that the treated material is evenly dispersed in the electrolyte; s5, drying: taking out the aluminum material after the reaction and strengthening are completed, transferring the aluminum material to a curing device for drying, and heating to a set temperature until the aluminum material is completely dried; and S6, inspection: inspecting whether the surface quality and the corrosion resistance of the finished product reach the standard or not.

The application provides a switch, which comprises two or more cavities, each cavity being provided with at least one opening; a rotating rod sequentially penetrating through each cavity, the rotating rod being provided with a plurality of cam portions corresponding to different openings, each cam portion driving a corresponding piston to extend or retract relative to the opening, so as to control the sealing structure on the different piston to close or open the corresponding opening. Thus, the same switch can be used to control the on-off switching of different media in different cavities, achieving the purpose of simultaneously switching the water path and the air path, and further enriching the application scenarios of the switch. Meanwhile, the application also provides a delivery device and a clothes processing equipment provided with the switch.

The utility model discloses a kind of evaporators for super-low temperature cryotherapy cabin in the technical field of cryotherapy cabin, including the shell of being fixed on the back of cryotherapy cabin, shell is sequentially provided with precooling chamber, evaporator body and mixing chamber from below to above along vertical direction in;Precooling chamber is equipped with precooling component for using cryotherapy cabin exhaust end waste gas recovery cold quantity to carry out preliminary cooling to fresh air;Evaporator body is used to cool fresh air after precooling to target low temperature;The top of shell is equipped with dosing component for atomizing and spraying medicine to mixing chamber, mixing chamber is used to mix atomized medicine with target low temperature fresh air, and mixed gas is delivered to cryotherapy cabin inside.The device is set through the double cooling structure of precooling component and evaporator body, not only effectively improve the comprehensive utilization of cold quantity, reduce the load of evaporator body, significantly reduce liquid nitrogen consumption.

The utility model provides a lifting chair which comprises a supporting mechanism, a backrest mechanism, a stool mechanism and a lifting mechanism, and the supporting mechanism comprises a base assembly and a supporting assembly; the backrest mechanism is slidably connected with the supporting assembly, and the stool mechanism is rotatably connected with the bottom of the backrest mechanism; the lifting mechanism comprises a power assembly and two transmission assemblies embedded in the backrest mechanism, the two transmission assemblies are arranged on the two sides of the power assembly respectively and matched with the supporting assembly, and the power assembly is used for driving the two transmission assemblies to synchronously drive the backrest mechanism to slide in the length direction of the supporting assembly. The lifting mechanism of the lifting chair is embedded in the backrest mechanism, the power assembly and the transmission assemblies are hidden, direct contact between a user and the power assembly and the transmission assemblies is avoided, the probability of occurrence of safety accidents such as clamping injury is greatly reduced, more balanced power output can be provided through the design of the double transmission assemblies, and the safety of the user is improved. And the backrest mechanism is kept stable in the lifting process.