64results about How to "Prevent leaning forward" patented technology

The invention relates to coal mine synthesizing exploiting caving top coal technique. Electro-hydraulic control caving top coal method is adopted hydraulic support to finish support caving top coal each procedure. The hydraulic support is made up of low order caving top coal hydraulic support and electro-hydraulic control system. In the electro-hydraulic control system, top beam incline sensor is added. The flash board jack is adopted travel sensor. The length of the flash board is increased, and the size of the coal discharging is adjusted in order to keep top beam horizontal and increase supporting stability. The coal discharging method includes the following steps: top coal sufficient crashing: adopting single sequence sublevel discharging; top coal middling crashing: adopting the same; top coal difficult crashing: adopting double sequence sublevel discharging. The invention can increase coal discharging control type, improve caving top coal technique adaptability, and realize high yield and high efficiency.

The invention relates to a learning seat for students, which belongs to the technical field of daily necessities, and includes a chair back, a chair surface and chair legs, and also includes a waist support assembly matching the radian of the human spine, a shoulder restraint belt and a hip restraint belt. The lumbar support assembly is movably connected with the chair back, the shoulder restraint belt is connected with the chair back, and the hip restraint belt is connected with the chair back or the chair surface. The learning seat for students proposed by the present invention is based on the lumbar support assembly that matches the curvature of the human spine and is movably connected with the back of the chair. At the same time, combined with the shoulder restraint belt and the hip correction belt, it can effectively correct the student's learning sitting posture and prevent the child's body. Leaning forward or lying on the stomach, hunchback with the chest in the chest, moving the hips forward and lying down, scoliosis and other problems are beneficial to the healthy development of the back and spine of students, and improve the effect of posture correction.

The invention discloses an air outlet plate controlling device for a split floor-type air conditioner. The device comprises a movable air outlet plate. The air outlet plate is arranged in front of an air outlet frame of the air conditioner and is driven by a rack-and-gear transmission mechanism to slide up and down along a guide rail. The device further comprises a retaining mechanism for connecting and retaining the movable air outlet plate on the guide rail, a limiting mechanism for limiting the rise / fall of the movable air outlet plate. The retaining mechanism comprises a guide rail press block arranged on the surface of the air outlet frame. The guide rail press block has a rim extending to the lateral side. A slide way is formed on the guide rail to engage with the rim. The air outlet plate controlling device has the advantages of simple structure, easy fabrication and assembly and beautiful appearance.

The invention relates to a desk and chair, in particular to a desk and chair capable of preventing students from humpback. The desk and chair capable of preventing the students from humpback aims at achieving the technical purposes that the sitting posture can be corrected, and the back can be exercised and relaxed. The desk and chair capable of preventing the students from humpback comprises a seat plate; a first connecting frame mounted on the seat plate; a backrest mounted on the first connecting frame; a lifting assembly mounted on the first connecting frame; and clamping assemblies mounted on the two sides of the backrest. The height of the desk and chair can be adjusted through the lifting assembly, so that humpback caused by improper seat height is prevented; through the clamping assembly, the shoulders of a student can be fixed, and the body of the student is prevented from leaning forwards when sitting on the chair, so that hunchback of the student is prevented.

The invention relates to safety antiskid stairs. The safety antiskid stairs comprise steps and is characterized in that each step comprises stepping face, a vertical exposed face and an inner lateral side; a piston cylinder is arranged in each step, a footboard is mounted at the end of the piston cylinder, and the surface of each footboard is parallel with the corresponding stepping face; a pressure spring is mounted in each piston cylinder, the upper end of each pressure spring is connected with the corresponding footboard, and the lower end of each pressure spring is connected with the bottom surface of the corresponding piston cylinder; each footboard can translate along the axis of the corresponding piston cylinder in a reciprocating manner; a gas port is formed in the bottom of each piston cylinder. The safety antiskid stairs are novel and unique in structure, capable of effectively increasing an antiskid effect, capable of changing gravity centers and capable of increasing safety and stability when women walk up and down the stairs.

The invention relates to the technical field of agricultural machinery, in particular to a rotatable mower header and a differential feeding method. The mower header is mainly composed of a left cardan joint (29), a left gear box (1), a left material guiding cylinder (7), a left cutter disc (10), a gear box (12), a right cardan joint (30), a right gear box (21), a right material guiding cylinder (16) and a right cutter disc (13). Different revolving speeds of the cutter discs and the material guiding cylinders are achieved, and the revolving speed of the cutter discs is high so as to ensure the cutting speed, low revolving speeds of the material guiding cylinders and material drainage. With the differential feeding method, roots of mowed forage grass are arranged at the front and the following crops are conveyed backwards in order, layout of forage grass strips is in order, the following operation is convenient, and at the same time, the forge grass is prevented from tilting forwards and secondary cutting is avoided.

The invention aims to provide a novel vehicle, and particularly relates to an electric wheelchair entire system of which the vehicle body of a tripod structure is telescopic in length, width and height, the seat is adjustable in height and the vehicle frame is adjustable on all sides. The three-dimensional transformable multifunctional electric wheelchair has low-gravity-center and low-wind-resistance properties during medium-speed running, and a stable feature after the vehicle frame chassis is stretched, as well as the characteristics that compactness and portability are realized, the vehicle body is small in turning radius and the wheel tread and the wheel space can be telescopic synchronously. The electric wheelchair can contract and deform to have the same horizontal width as a common wheelchair to run at a low speed and stretch and deform to run at a medium speed to realize seamless joint of indoor and outdoor running in specific environments (such as slow running, stopping, elevator entering and running in narrow rooms and roads).

The invention discloses a truss tower. The truss tower comprises a base frame. The top and the bottom of the base frame are provided with a first connecting part and a second connecting part correspondingly. The front portion of the base frame is provided with a front truss part, and the rear portion of the base frame is provided with a rear truss part. The front truss part is located on the lowerportion of the base frame. The rear truss part is located on the upper portion of the base frame. The truss tower provided by the invention can be used in most of service environments at present without additionally arrangement of counter weights. The truss tower is simple and practical in structure and easy to manufacture and use. The invention further provides spanning construction protection equipment. The spanning construction protection equipment comprises a base and a main frame body. The main frame body comprises a main tower, a cross beam and an auxiliary tower which are pivoted together in sequence. The main tower is the above truss tower. The main tower is pivoted to the base through the lower connecting part at the bottom of the main tower. The cross beam is pivoted to the upper connecting part of the top of the main tower and located on the front side of the main tower. When the spanning construction protection equipment is in use, there is no need to additionally arrangethe counter weights. The spanning construction protection equipment is simple and reliable in structure and easy to manufacture and use.

The invention is applicable to the technical field of robots, and provides a wheeled robot and a control method thereof. The wheeled robot comprises a robot main body, a ranging sensor arranged at thefront end of the robot main body and used for detecting the distance between the robot main body and the ground, a head rotationally arranged on the robot main body and used for adjusting the gravitycenter of the wheeled robot, and a control module electrically connected with the ranging sensor and used for receiving a signal detected by the ranging sensor and controlling the head to rotate according to the received signal. The gravity center of the wheeled robot is controllable, so that the shape design of the wheeled robot is not limited, meanwhile the braking acceleration of the wheeled robot is improved, and the traveling speed of the wheeled robot is increased; and in addition, the distance detection of the ranging sensor located at the front end of the robot main body can prevent the wheeled robot from falling off, and the arrangement of the head can prevent the wheeled robot from leaning forwards or rolling over during falling prevention braking.

The invention relates to the field of marine product processing, in particular to an automatic shelling machine of prawns as well as a shelling method of the automatic shelling machine. The automaticshelling machine of the prawns comprises a processing platform; the shelling machine comprises a material supply conveying belt, an auxiliary conveying belt, a primary pinch-off device, a passive cut-off device and a pre-shelling device; the material supply conveying belt is arranged above the processing platform slantways; the auxiliary conveying belt is horizontally arranged below the side of the material supply conveying belt; a plurality of first jigs and second jigs are arranged on the conveying planes of the material supply conveying belt and the auxiliary conveying belt correspondingly;the conveying directions of the material supply conveying belt and the auxiliary conveying belt are parallel with each other; the primary pinch-off device and the pre-shelling device are arranged onthe outer side of the auxiliary conveying belt; a shell pulling device and a stuffing taking device are arranged above the material supply conveying belt; the primary pinch-off device, the pre-shelling device, the shell pulling device and the stuffing taking device are arranged at intervals sequentially in the conveying direction of the material supply conveying belt; the passive cut-off device isarranged between the material supply conveying belt and the auxiliary conveying belt. The shells of prawns with heads removed can be shelled automatically, and the processing efficiency of products is greatly improved.

The invention provides remote operation intelligent shopping robot equipment. The equipment comprises a base, a communication service base station and a user mobile terminal; the bottom of the base isprovided with four wheels, wherein a motor is mounted between the two wheels at the front end; a signal receiver is mounted in the middle of the front side wall of the base; a wireless communicationmodule is arranged in the signal receiver; a cuboid control base box is fixedly mounted in the middle of the top plane of the base upwards; the control base box is internally provided with a chip; a storage basket is mounted at the rear end of the top plane of the control base box; and two parallel stand columns are symmetrically mounted on the part, on the front side of the storage basket, of thecontrol base box. Through the equipment, people can enjoy the pleasure of shopping without leaving home, the mode is more reliable than online shopping, the way of sending goods to the home by courier in the increasingly congested modern society reduces time consumption caused by traffic jam, urban travel pressure is relieved, and users can have more energy for other activities.

The invention discloses an amphibious excavator, and the amphibious excavator comprises a buoyancy tank crawler excavator body, a front buoyancy tank and a rear buoyancy tank are respectively formed at the front side and the rear side of a rack of the machine body of the buoyancy tank crawler excavator body, the top of the rear side of the front buoyancy tank is hinged to a piston rod of a first hydraulic cylinder hinged to the rack, two ends of the rear side of the front buoyancy tank below the first hydraulic cylinder are hinged to the rack respectively, the top of the rear side of the rear buoyancy tank is hinged to a piston rod of a second hydraulic cylinder hinged to the rack, two ends of the rear side of the rear buoyancy tank below the second hydraulic cylinder are jointed to the rack respectively, the front sidewall of the front buoyancy tank leans backward from the upper side to the lower side, the top surface of the front buoyancy tank leans upwards from the front side to the rear side, the hydraulic cylinder operation button is formed in the cab of the machine body of the buoyancy tank crawler excavator, the first hydraulic cylinder and the second hydraulic cylinder are connected to the control device through the hydraulic cylinder operation button. The running resistance is small in the water, the running speed is high, and the anteverted phenomenon of the body at the time of mechanical arm of excavator for protracting can be avoided.

The invention discloses an anti-myopia sitting posture correction device, comprising a chin support frame, a soft rubber pad is arranged on the top of the chin support frame, and a telescopic rod is fixedly connected to the bottom of the chin support frame, and a fixed nut is arranged in the middle of the telescopic rod , the inside of the fixed nut is provided with an elastic threaded column, and the inner side of the elastic threaded column is fixedly connected with a fixed block, and the side of the telescopic rod is fixedly connected with a connecting rod fixing seat, and the connecting rod fixing seat is connected to the supporting pad through the connecting rod rotation shaft The connecting rods are connected, and the supporting pad connecting rod is connected with the arm supporting pad through the supporting pad connecting shaft, and the inner sides of the upper splint and the lower splint are fixedly connected with anti-slip rubber pads. The anti-myopia sitting posture correction device is provided with a chest support plate, which can support the student's chest and avoid leaning forward, thereby preventing the student from getting closer to the desktop and protecting eyesight, and the chest support plate is provided with a waist positioning plate, which can prevent Students move their bodies left and right to maintain correct sitting posture.

The invention relates to an examination bed special for indolent enteroscope anesthesia. The examination bed is composed of bed legs, a bed plate, holes, restraint straps, an arm fixing rack and a pillow. The bed legs are connected beneath the bed plate, holes are formed in the left side and the right side of the bed plate, and the tail ends of the restraint straps can be buckled in the holes. The arm fixing rack is composed of a vertical rod and a horizontal plate, the lower end of the vertical rod is matched with the holes in the two sides of the bed plate in size, and the upper end of the vertical rod is connected with the horizontal plate. The horizontal plate is provided with a hoop and loop fastener capable of fixing the arms of patients, and the end, close to the center of the bed plate, of the horizontal plate is bent downwards. The adjustable inflation pillow is arranged on the head side of the bed plate. The examination bed special for indolent enteroscope anesthesia has the advantages that the examination bed is provided with the adjustable inflation pillow, the arm fixing rack conforming to physiological curvature and the constraint straps, hence, extra physical labor of anesthetists can be reduced so that the anesthetists can more concentrate on clinical anesthesia and vital sign monitoring, and the patients can feel more comfortable and safe in the examining and treating process.

The invention discloses a crane arm system thereof. The crane arm system comprises a principal arm, a luffing auxiliary arm, a traction part, a front mast, a rear mast, a first connection rack, a second connection rack, and a forward-tilt resistant rod which is arranged a rear mast side close to the front mast. The principal arm is hinged to the luffing auxiliary arm by the first connection rack and the second connection rack. One end of the forward-tilt resistant rod is hinged to one of the first connection rack and the rear mast and the other end of the forward-tilt resistant rod is in a slip connection relationship with the other one of the first connection rack and the rear mast. The forward-tilt resistant rod is used for preventing the rear mast in a preset position from rotating to the front mast. The crane arm system prevents a series of risks caused by rear mast forward-tilt in crane operation thereby guaranteeing crane operation safety. The invention also discloses a crane with the crane arm system.

The invention discloses an auxiliary walking device for a user with ankle injury. The auxiliary walking device comprises an armpit supporting device, support columns and a foot fixing device, whereinthe support s allowing angular adjustment are arranged between the armpit supporting device and the foot fixing device. The support columns include an upper body support column, a thigh support columnand a calf support column. A rotating shaft mechanism allowing angular adjustment is arranged between the upper body support column and the thigh support column and between the thigh support column and the calf support column respectively. The outer portions of the upper body support column, the thigh support column and the calf support column are respectively provided with a fixing strap. The foot fixing device comprises a fixing device bottom plate in rigid connection with the calf support column. A flexible sheath is disposed on the upper surface of the fixing device bottom plate. A heating device is arranged in the flexible sheath. The auxiliary walking device can assist the user with the ankle injury to walk normally and assist the ankle rehabilitation, and is convenient to wear.

The invention discloses a mold clamping mechanism of a two-plate injection molding machine. The clamping mechanism comprises a movable mold plate and a fixed mold plate that are arranged in parallel and at an interval, wherein a mold locking oil cylinder is arranged on one side, far away from the movable mold plate, of the fixed mold plate; the end part of a mold locking piston rod penetrates through the fixed mold plate and then is connected with the movable mold plate; a mold moving mechanism used for driving the movable mold plate to move along the mold locking piston rod is arranged between the movable mold plate and the fixed mold plate; a half-and-half brake nut capable of locking or unlocking the mold locking piston rod is arranged on one side, far away from the fixed mold plate, ofthe movable mold plate; a fine adjustment oil cylinder is fixedly arranged at one end, far away from the fixed mold plate, of the mold locking oil cylinder; the area of the cross section of the fineadjustment oil cylinder is smaller than that of the mold locking oil cylinder; a fine adjustment piston rod is arranged in the fine adjustment oil cylinder; the end part of the fine adjustment pistonrod is fixedly connected with a mold locking piston. The mold clamping mechanism of the two-plate injection molding machine has the advantages of being high in linkage degree, production efficiency and product quality.

The invention discloses a hydraulic support frame. The frame comprises a low position caving top coal hydraulic support frame, and the low position caving top coal hydraulic support frame comprises atop beam and a vertical column, a base, a cover beam, a guard plate, a guard jack, a front conveyor pushing jack, a rear conveyor pulling jack and a tail beam, a tail beam jack, an inserting board andan inserting board jack of a coal placing mechanism and an electro-hydraulic control system; the electro-hydraulic control system includes a bracket controller, an electro-hydraulic valve group, a vertical column pressure sensor, a pushing jack stroke sensor, a tail beam jack stroke sensor, an inserting board jack sensor, a vertical column and signal lines of each jack sensor. The frame is addedwith the functions of detecting and controlling the extension length of the inserting board and adjusting the size of a coal placing mouth on the basis of retaining the advantages of the electro-hydraulic control and the hydraulic support of the low position caving top coal, can improve the control effect of the coal placing, adds an adjustable variable for the electro-hydraulic control amount ofthe caving top coal, and increases the control methods of the caving top coal.

The invention discloses a child vehicle high in safety performance. The child vehicle comprises a vehicle body, wheels and a steering wheel. The wheels are located at the bottom of the vehicle body, the steering wheel is located on the upper portion of the vehicle body, an air bag is arranged in the vehicle body, an electric inflator pump is arranged on one side of the air bag, one side of the electric inflator pump is connected with a switch, connecting columns are arranged on one side outside the switch, one end of each connecting column is fixedly connected with a safety bumper, the safetybumper is located outside the vehicle body, the surface of one end of each connecting column is connected with a spring, and the springs are located between the vehicle body and the safety bumper. Through arrangement of the safety bumper and the electric inflator pump, impact force is effectively buffered, and the personal safety of a child is effectively protected; through arrangement of shock absorbers and a fiber cotton cushion, the comfort level of a seat is effectively improved; and through arrangement of a Bluetooth voice box and a GPS positioner, the playing pleasure of the child is effectively enhanced, the voice recognition degree of the child is improved, and meanwhile the child is prevented from leaving the sight of an adult.

The invention provides a counter weight wheel which is arranged on the rear portion of a vehicle body. The counter weight wheel comprises a rim capable of rotating freely around an axle; a tire is put around the rim; the tire is provided with sucker components circumferentially in an equally-spaced manner; sucker surfaces of the sucker components face outward; necks of the sucker components extend to the axle in the radial direction of the rim; the rim is provided with air guide holes, which right face the neck positions, in an equally-spaced manner; the rim is internally provided with an air pump; an air pumping end of the air pump faces downward vertically and is attached to the inner wall of the rim in a hermetic manner; the rim can rotate freely relative to the air pump. A forklift has lighter weight, enables sensitive turning and moving, effectively increases the carrying efficiency, and operates stably and safely.

The invention relates to an auxiliary correction device, in particular to an auxiliary correction device for the orthopedic spine. The technical problem to be solved by the invention is to provide theauxiliary correction device for the orthopedic spine, which is capable of adjusting a correction angle and comfortably correcting the spine. The auxiliary correction device for the orthopedic spine comprises a base, a seat mounted on the base in a sliding manner, a power assembly mounted on the base and powered by a motor to work, a correction assembly mounted on the base, and an angle adjustingassembly mounted between the correction assembly and the base and used to change the correction angle in a moving mode. Through cooperation of the power assembly, the correction assembly and the angleadjusting assembly, the angle of the correction assembly can be changed, and the spine of a person can be better corrected; and due to the fact that the angle of a correction backrest can be adjusted, the patient can be better adapted, and the patient can feel more comfortable when the spine is corrected.

The invention discloses a high-speed stirring drilling machine and a construction method thereof, and belongs to the technical field of pile foundation construction. A pile frame, a base plate, a vertical rotation power system, a ring-direction rotation power system, a rotation driver, a rotation pressing disc, a drill rod, a drill bit, a chain, a curing material pumping system and a high-pressuregas supply system are included. The pile frame and the base plate are connected through bolts. The vertical rotation power system and the ring-direction rotation power system are both arranged on thebase plate. The rotation driver 3 is connected with the pile frame through a guide rail, the rotation pressing disc is connected with the vertical rotation power system through the chain, the rotation pressing disc is connected with the drill rod through a flange, the drill rod is connected with the drill bit through a flange, and the curing material pumping system and the high-pressure gas supply system are connected with the drill rod through a high-pressure rubber pipe. Through lower arrangement of a power head, the gravity center of the drilling machine is lowered, and forward tilting ofthe drilling machine in the construction process is prevented; and only through arrangement of one power head, the functions of drill lowering and drill lifting are achieved, the construction procedures are reduced, the construction efficiency is improved, and the cost is saved.

The invention provides an automobile child safety seat. Five-point type safety knots and four adjustment position combinations are adopted so that the automobile child safety seat can be suitable for children in different figures, and the automobile child safety seat can be used for infants at different ages due to the fact that three gears of stature shoulder positions are adopted. The automobile child safety seat is characterized in that at the moment that a collision accident occurs to an automobile, a woven tape can be firstly tensioned before a passenger moves forward so that the passenger can be instantly and tightly bound to the seat, then, the woven tape is locked so that the body of the passenger can be prevented from bending forward, and the passenger is effectively protected safe. Through an ordinary double-knot three-belt composite safety belt and a safety hasp with the unique design, the chest, the stomach and the lower limbs of the child passenger can be fixed to the seat in a comfortable and appropriate mode. A multi-directional adjustment and fastening system is adopted, and therefore any fault possibly caused when the child passenger is held by hand can be eliminated, and various possible accidents caused by free touching and free moving when the child passenger is seated alone can also be avoided. Powerful protection, buffer and maintenance functions can be provided for children in the normal driving process and when accidents occur.

The invention discloses an adjustable walking aid comprising an underframe, an angle adjusting mechanism fixedly arranged on the underframe, an anti-rollover mechanism fixedly arranged on the underframe, a stand column fixedly arranged on the underframe, a support frame fixedly arranged on the stand column , a power assisting mechanism fixedly arranged on the support frame, armrests arranged on the support frame in a sliding mode and fixedly connected to the power assisting mechanism, a waist fixing mechanism arranged on the armrests in a sliding mode, a seat arranged on the stand column in asliding mode, and a backrest arranged at the top end of the stand column in a sliding mode. The adjustable walking aid is simple in structure, capable of providing assistance in the walking rehabilitation training process, high in adjustability and good in rehabilitation training effect.

The invention discloses an atmospheric environment monitoring system based on a hyperspectral technology and a monitoring device thereof. The system comprises an unmanned aerial vehicle, a data acquisition module, a data transmitting module, a data transmission module, a data receiving module, a data analysis module, a data processing module, a data storage module and a data output module. The atmospheric environment monitoring device based on the hyperspectral technology comprises an unmanned aerial vehicle body, the outer side end of the unmanned aerial vehicle body is fixedly connected with a plurality of horizontal rods, and each horizontal rod is provided with a propeller wing. According to the invention, the hyperspectral camera, the gas optical sensor and the aerial survey module of the unmanned aerial vehicle are integrated and cooperate with each other to accurately collect environmental data, and remote control monitoring is carried out through a ground station and workers of a remote control station; therefore, a detection operator do not need to carry sampling equipment to enter an enterprise production plant area for monitoring and sampling work, and the personal safety of environment monitoring personnel can be effectively guaranteed.

The invention relates to safety antiskid stairs. The safety antiskid stairs comprise steps and is characterized in that each step comprises stepping face, a vertical exposed face and an inner lateral side; a piston cylinder is arranged in each step, a footboard is mounted at the end of the piston cylinder, and the surface of each footboard is parallel with the corresponding stepping face; a pressure spring is mounted in each piston cylinder, the upper end of each pressure spring is connected with the corresponding footboard, and the lower end of each pressure spring is connected with the bottom surface of the corresponding piston cylinder; each footboard can translate along the axis of the corresponding piston cylinder in a reciprocating manner; a gas port is formed in the bottom of each piston cylinder. The safety antiskid stairs are novel and unique in structure, capable of effectively increasing an antiskid effect, capable of changing gravity centers and capable of increasing safety and stability when women walk up and down the stairs.

The invention discloses a lifting mechanism for nut shell packaging. The lifting mechanism for nut shell packaging comprises a hopper which is in the shape of a dustpan. The lifting mechanism for nut shell packaging is characterized in that a fixed handle and a movable handle are installed on the two sides of the hopper respectively; the fixed handle is fixed on the front side of the hopper, and the movable handle is installed behind the fixed handle and hinged to the hopper; an anti-dumping rope is installed between the rear side of the hopper and the movable handle; an extending force application plate is arranged behind the hopper. According to the lifting mechanism for nut shell packaging, nut shells can be completely transferred away from a production site, force application is easy, and the transferring efficiency is high.

The invention discloses a turnover automobile co-driver seat cushion structure which comprises a fixing frame and a side frame, the fixing frame is installed at the lower end of the side frame, a connecting plate is slidably connected to one end of the fixing frame, a connecting frame is fixed to the other end of the connecting plate, and a connecting shaft is fixed to the interior of the side frame; the other end of the connecting shaft is rotatably connected with a supporting pad, the outer wall of the supporting pad is attached to the outer wall of the fixing frame, and a rotating plate is rotatably arranged in the supporting pad. By designing the turnover automobile co-driver seat cushion structure, a backrest of the seat cushion can be driven by a motor to rotate, so that people can feel more comfortable when sitting on the seat cushion; and when the backrest cushion rotates, one end of the supporting cushion can be pushed to rotate, so that the supporting cushion also forms a certain inclination angle, after the backrest cushion inclines, the supporting cushion also inclines, the joint of the backrest cushion and the supporting cushion is more sunken, and the supporting effect is better when a person sits at the upper end of the supporting cushion.