146results about How to "Sit comfortably" patented technology

The invention relates to an office chair, in particular to an adjustable office chair. Against the technical problems to be solved, the invention provides the adjustable office chair that can be adjusted in height, enables users to adjust the angle of a backboard, and is comfortable to sit on. In order to solve the technical problems, the invention provides such an adjustable office chair comprising a base plate, a first bearing block, a first rotating shaft, a fixing plate, a toggle mechanism and a lifting mechanism and the like. The first bearing block is disposed at the middle of the top ofthe base plate, the first rotating shaft is arranged in the first bearing block, the fixing plate is disposed at the top end of the first rotating shaft, the toggle mechanism is arranged on the leftside of the top of the fixing plate, the lifting mechanism is arranged on the right side of the top of the fixing plate, and a sitting plate is arranged at the top of the lifting mechanism. Through mutual matching of the toggle mechanism and the lifting mechanism, the sitting plate is driven to move up and down, to adjust different heights.

The invention relates to a seat base plate and a seat with the same. The seat base plate comprises a pallet main base, a seat support plate, a movable support part and a pair of movable support plates, wherein the seat support plate is arranged above the pallet main base; the front end of the movable support part is connected with the seat support plate in a pivoting way, the lower end of the movable support part is connected with the pallet main base in a pivoting way, and the rear end of the movable support part is connected with a seat backrest; the front end and the rear end of the movable support part can pivot by taking the lower end as a supporting point; the pair of movable support plates are arranged in front of the movable support part; the upper end and the lower end of each movable support plate are connected with the seat support plate and the pallet main base in a pivoting way, respectively, so that the seat support plate can be supported in a balanced way when moving along with the movable support part; an elastic part for resisting the backward rotation of the movable support part is arranged on a pivot through which the movable support part is connected with the pallet main base. After the seat base plate is adopted, a user can feel a proper sense of pressure when leaning against the backrest, and the friction between the backrest and the back of the user can be reduced.

The invention provides an interlocking bed. The interlocking bed includes a bed frame stander, a bed board arranged on the bed frame stander, a back transmission connection frame rod below the bed board, a leg transmission connection frame rod, an interlocking connection rod and a drive device; the bed board includes a back bed board, a thigh bed board and a calf bed board which can be connected with the thigh bed board in a rotating way; the back bed board, the thigh bed board, the back transmission connection frame rod and the leg transmission connection frame rod are respectively connected with the frame of the bed in a rotating way; the back transmission connection frame rod includes a first end part and a second end part; the first end part and the back bed board can be connected in an opposite moving way; the second end part can be connected with the interlocking connection rod in a rotating way; the leg transmission connection frame rod includes a first tail end and a second tail end; the first tail end and the leg transmission connection frame rod can be connected in an opposite moving way; the second tail end and the interlocking connection rod can be connected in a rotating way; the drive device is arranged on the bed frame stander and is connected with the interlocking connection rod for driving the interlocking connection rod; the bed is skillfully designed, is conveniently used, can realize conversion between the modes of sitting and lying, thus leading a person to sit and lie on the bed comfortably.

The invention relates to the technical field of products for babies. The baby holding waist stool is simple in structure, safe and comfortable in use, soft and portable in carrying and comprises a holding bag, a waist band and a waist stool, wherein the waist band is connected to the waist stool, the holding bag is connected to the upper part of the waist stool, the waist stool comprises an air bag and a shell for containing the air bag, and the air bag can be inflated and deflated.

The invention discloses a protective wheelchair for recovery in an orthopedics department. The protective wheelchair for recovery in the orthopedics department comprises support legs, wherein a retractable leg is mounted on the top of each support leg; the tops of the retractable legs are fixedly connected with a bottom plate; the bottom of the bottom plate is fixedly connected with a buffering support; the bottom of the buffering support is fixedly connected with a hydraulic retractable rod; the bottom of the buffering support is fixedly connected with an explosion-resisting bottom plate; thetop of the explosion-resisting bottom plate is fixedly connected with a buffering device; a seat cushion is arranged on the top of the bottom plate; the outer wall of the bottom plate is fixedly connected with detachable armrests; an adjusting switch is arranged on the outer wall of the bottom plate and is positioned between the detachable armrests; a rotation adjuster is mounted at one end of the bottom plate; and the top of the rotation adjuster is fixedly connected with a backrest. The invention relates to the technical field of recovery in the orthopedics department. By the protective wheelchair for recovery in the orthopedics department, the problem that in a recovery process of a patient, a large amount of nursing time of nursing staff in the orthopedics department is required for protection to the leg of the patient is solved, the patient can comfortably sit on the wheelchair for a long time, and feeling of fatigue is relieved.

The invention discloses an electric assisted closestool support, comprising a lifting device and a feet support device, wherein the feet support device is arranged on the lifting device; the lifting device comprises a first lifting device, a second lifting device and a seat plate; the front end of the seat plate is respectively hinged to the first lifting device and the second lifting device; a first support device comprises a first pedal support plate, a first pedal connecting plate and a first electric push rod; the first pedal support plate is fixedly connected to the end part of a pedal adjusting plate, the middle of the first pedal connecting plate is hinged on the first pedal support plate, one end of the first electric push rod is hinged to the first pedal connecting plate, and theother end is hinged to the bottom end of the first pedal support plate. A pneumatic rod of the lifting device can jack up the seat plate so as to hold the old to stand, and when going to the toilet, legs of the old can be lifted according to different heights by the feed support device, so that the thighs form an angle of 35 degrees with the body, musculi puporectalis relaxes and defecation is smooth, and then the defecation time is shortened, and occurrence of constipation, haemorrhoids and the like is reduced.

The invention discloses a high-safety sitting and standing work chair. The high-safety sitting and standing work chair comprises a base, a sliding rail assembly, a seat supporting part and a back supporting part, wherein the base comprises a base body and a warping plate; the sliding rail assembly is provided with a movable rail and a static rail which are in sliding fit with each other, and the static rail is fixedly connected to the warping plate; the seat supporting part is provided with a first seat and a second seat, and in a flat sitting state, the first seat and the second seat jointlysupport the hip and the legs of the human body; in a standing posture state, only the first seat presents the attitude of supporting the hip and the legs of the human body; the back supporting part isconnected with the movable rail and moves up and down along with the movable rail; a safety locking control mechanism is arranged between the base and the seat supporting part, the safety locking control mechanism is configured to be triggered when the seat supporting part is in the flat sitting state, and the warping plate rotates relative to the base body; and when the seat supporting part is converted to be in the standing posture state from the flat sitting state, the warping plate is kept fixed relative to the base body, and at the moment, the back of the chair cannot be leaned back, sothat the use safety is guaranteed.

The invention relates to the field of redwood furniture, in particular to multifunctional redwood sofa. The multifunctional redwood sofa comprises a sofa body, an adjustable backrest, a backrest adjustment assembly, a linkage assembly and a leg support plate; a rectangular hollow groove is formed in the bottom end of the sofa body; a leg support plate groove and a front rack sliding chute are formed in the front end of the sofa body; the front rack sliding chute is communicated with the leg support plate groove; a backrest groove and a rear rack sliding chute are formed in the rear end of thesofa body; the rear rack sliding chute is located at the lower end of the backrest groove; the front rack sliding chute, the rectangular hollow groove and the rear rack sliding chute are communicated;a material support plate groove is formed in the left side surface of a left vertical plate of the sofa body; a control groove is formed in the top surface of the left vertical plate of the sofa body; an ejection groove is formed in the front side surface of the left vertical plate of the sofa body; and the ejection groove is communicated with the control groove. The multifunctional redwood sofais internally provided with the adjustable backrest and left support plate, so that users can sit on the sofa more comfortably and then the convenience of the multifunctional redwood sofa is improved.

The invention discloses a headrest for a vehicle seat and a sofa backrest capable of automatically regulating angle and front and back positions. The headrest comprises a fixed support mechanism, a movable support mechanism, an angle adjusting mechanism, a travelling mechanism, an inserted link groove moving baffling mechanism, an electronic control part and a face material assembly, wherein the movable support mechanism, the angle adjusting mechanism, the travelling mechanism, the inserted link groove moving baffling mechanism and the electronic control part are all arranged in the fixed support mechanism; the whole apparatus is fixed in a socket hole of a headrest for the vehicle seat and the sofa backrest in a movable and swingable manner by the headrest inserted link of the travelling assembly; after the travelling switch is pressed, the travelling mechanism can enable the whole apparatus to move forwards and backwards for 50mm relative to the headrest inserted link, and the angle adjusting mechanism enables the whole apparatus to respectively swing up and down for 17 degrees relative to a headrest inserted link assembly; and in the headrest for the vehicle seat and the sofa backrest, a flexible support for the neck of the human body is arranged at the neck of the human body at the front part of the headrest body.

The invention discloses a chair for getting pediatric medical treatment. The chair comprises rollers, a bottom plate is fixed to the upper ends of the rollers, a seat cushion is arranged above the bottom plate, and a sponge pad is embedded in the outer side of the seat cushion. The seat cushion can be lifted up and down on the bottom plate by utilizing a hydraulic lifting rod, then the height of the whole child chair device can be controlled, the height is decreased to be lowest, a child can conveniently sits on the seat cushion, the height is increased to be highest, a medical staff does notneed to squat to diagnose the disease, and can conveniently obverse the disease condition of the child, meanwhile, the inclination degree of a pedal can be adjusted on the bottom plate, the child canconveniently put feet on the pedal, thus the child can sit on the chair more comfortably, a first connection shaft can make a leg fixing plate and a belly fixing plate rotate on the seat cushion and abackrest respectively, when the child sits on the seat cushion, the leg fixing plate is rotated towards the inner side of the chair, and the belly fixing plate is rotated towards the inner side of the chair.

The invention relates to a leisure rocking chair, in particular to a leisure rocking chair for foot massage. The technical problem to be solved by the invention is to provide a leisure rocking chair for foot massage, which massages the feet, is safe and reliable, and automatically generates wind for cooling. In order to solve the technical problem, the invention provides a leisure rocking chair for foot massage, which comprises a base, a first bracket, a first fixed plate, a sliding rail, a second fixed plate, a first bearing seat, a third fixed plate. a second bearing seat, a first rotating shaft, a spur gear, racks, a first bevel gear, a fourth fixed plate, a second bevel gear, a first pulley, a second bracket, a first fixed rod, a second pulley, a third pulley, a first belt, a first mounting plate, a first gear, a fourth pulley, a second belt, a second gear, a massage wheel, a second fixed rod, a first spring, a fifth fixed plate, a swing seat and a rocking chair. The leisure rocking chair achieves the function of massaging the feet while rocking and automatically generating wind for cooling.

The invention describes an adjustable intelligent heating chair, which includes a hydraulic cylinder A, a hydraulic cylinder B, a chair body, a pedal hinged to one end of the chair body, and a backrest hinged to the other end of the chair body; the lower end of the chair body is provided with an L-shaped The support frame includes a vertical rod and a horizontal rod; the cylinder barrel of hydraulic cylinder A is hinged to the vertical rod, the piston rod of hydraulic cylinder A is hinged to the pedal; the cylinder barrel of hydraulic cylinder B is hinged to the horizontal rod, and the hydraulic pressure The piston rod of cylinder B is hingedly connected with the backrest; a hollow cushion is arranged on the outer surface of the chair main body, and a spring is arranged in the cavity of the cushion, and the two ends of the spring are respectively connected with the upper and lower surfaces of the inner cavity of the cushion; There is an isolation layer, and a heating wire is arranged between the isolation layer and the cushion. In the present invention, the setting of the spring makes the cushion have elasticity, which increases the user's comfort. The setting of the heating wire is used for heating, which makes the user sit comfortably in the cold winter.

The invention relates to an arm movement device, in particular to an arm movement device for rehabilitation of a patient suffering from stroke in the neurology department. The arm movement device forthe rehabilitation of the patient suffering from stroke in the neurology department aims at achieving the purpose that the patient can do exercise as her / his will without support of other people around her / him. The arm movement device for the rehabilitation of the patient suffering from stroke in the neurology department is characterized by comprising a baseplate and the like; two supporting plates are arranged on the upper left side of the baseplate, a seat plate is arranged on the tops of the two supporting plates, a backing plate is arranged on the left side of the top of the seat plate, anarm movement mechanism is arranged on the right side of the top of the seat plate, and a leg massage mechanism is disposed below the arm movement mechanism. Arms are moved by the arm movement mechanism, and meanwhile the leg massage mechanism is driven to conduct massage on the thighs of the patient; a back relaxing mechanism can conduct massage on the back of the patient, so that the legs of thepatient are stretched and exercised through the stretching movement of the legs, and blood circulation is accelerated.

The invention discloses an interesting multifunctional coffee table for household use, which comprises a tea table panel, tea table legs and a storage board. The lower outer ring of the tea table panel is equipped with a plurality of tea table legs, and the upper part of the coffee table legs is equipped with a storage board. There is an adjustable telescopic rod on the left side of the top, a supporting plate is installed on the upper end of the adjustable telescopic rod, a magnetic writing board is arranged on the top of the supporting board, a water storage tank is arranged on the right side of the adjustable telescopic rod, and a There is a boss, and the outer side of the boss is provided with a water collection tank on the top of the coffee table panel. The water collection tank and the water storage tank are connected through a water delivery pipe. The lower side of the storage board is also equipped with a heating device, and a rotating sleeve is installed on the coffee table legs. One side of the rotating sleeve is connected with a stool leg through a connecting rod, and a seat plate is installed on the upper end surface of the stool leg. The invention has novel structure and rich functions, is suitable for family use, improves the fun of life and brings convenience to people.

The invention relates to a vaginal douching bed which comprises a base. A seat and a douching water tank are fixedly arranged on the base, a waste liquid bucket is arranged on the base, the seat comprises a cushion, a backrest and handrails, a detachable waste liquid collecting water tank is arranged on the lower portion of the cushion, the bottom of the waste liquid collecting water tank is connected with the waste liquid bucket through a waste liquid pipeline, the seat is connected with a douching device through a support rod, the douching device comprises a control handle and a douching head which are connected, the control handle is connected with the douching water tank and the waste liquid pipeline separately, pedals are arranged at the tail ends of the handrails, a controller is arranged in the control handle, a temperature sensor, a pressure sensor, a water pump and a heater are arranged in the douching water tank, a signal input end of the controller is connected with the temperature sensor and the pressure sensor separately, a signal output end of the controller is connected with the water pump and the heater separately. Accordingly, the cleaning effect is very good, clothes of a patient cannot be wet, and the vagina of the patient can be cleaned thoroughly.

The invention discloses a chair type intelligent electric auxiliary toilet seat and a control method thereof. The auxiliary toilet seat comprises a first electric switch, a second electric switch, a toilet seat, a backrest, a handrail, a bracket, a front telescopic pole, a back telescopic pole, a hinge, a screw, a fixing device, a servo motor, a pressure sensor, a displacement sensor and a digital computer. The servo motor is controlled to operate by the digital computer so as to provide assistance in standing up and sitting down. A chair body comprises the backrest, the bracket and the handrail; through adoption of user-friendly design, the user can sit on the toilet seat comfortably and safely. The chair type intelligent electric auxiliary toilet seat disclosed by the invention is suitable for the aged having troubles with low backs and legs, can effectively help the aged to use the toilet independently, can prevent the aged from fainting, can provide safety protection for the aged after sudden fainting and can avoid accidental injuries of the aged. The chair type intelligent electric auxiliary toilet seat disclosed by the invention has the advantages that the applicability is wide and the dimension can be adjusted according to corresponding toilets and can be placed on various toilets.

The invention relates to a cushion with switchable bearing parts and a switching control method. The temperature of conventional cushions with switchable bearing parts cannot be uniformly controlled. The cushion with switchable bearing parts in the invention comprises a cushion (42); the cushion is connected with a control unit (40) via a pipeline; the control unit is connected with a medium box (16) via a pipeline; the cushion comprises a base plate (2); the base plate is provided with an inlet-and-outlet pipe A (6) and an inlet-and-outlet pipe B (7); the inlet-and-outlet pipe A is communicated with coating films on or lining capsules of a group of grooves A (3) to form a cavity; the inlet-and-outlet pipe B is communicated with coating films on or lining capsules of a group of grooves B (4) to form another cavity; and the soft films on the grooves are separately connected with the ends of the grooves A and the grooves B. The invention discloses the cushion with switchable bearing parts and the switching control method.

A bar chair with an elastic spliced seat board comprises a pedestal, lifting legs arranged on the pedestal, and a seat board arranged on the legs and respectively connected with a tray connected with the legs and a seat panel on the tray. The bar chair is characterized in that folded edges are formed at the periphery of the seat panel of an elastic body; a cavity is formed in the folded edges; a connection board is arranged on the entire bottom surface of the seat panel of the elastic body in such a manner that the periphery of the connection board is arranged in the cavity; supporting and positioning sheets and hooks are formed below the connection board; ribs and fixed grids among the ribs are formed on the tray; slots are formed on the ribs; the supporting and positioning sheets of the connection board match the fixed grids in the tray; and the hooks match the slots. During the installation, the supporting and positioning sheets are arranged in the fixed grids for positioning and supporting, and the hooks are inserted into the slots to fix the connection board and the tray, thus achieving convenient entire assembly and connection, good matching, and reliable and firm effect.

A conjoined drain opening lift type headrest bath barrel comprises a barrel body and a barrel bottom. A base is arranged on the barrel bottom, and a drain opening is formed in the barrel bottom. The conjoined drain opening lift type headrest bath barrel is characterized in that a flanging is arranged on an upper opening of the barrel body, an inserting ring is arranged below the flanging on the rear side of the opening of the barrel body, a clamping hole is formed in the wall of the inserting ring, an inserting hole is formed in the inserting ring, a lift type headrest is arranged in the inserting hole, the lift type headrest comprises a headrest body, an inserting rod is arranged below the headrest body, an adjusting hole is formed in the inserting rod, a positioning block is arranged on the outer wall of the inserting ring, a positioning pin is arranged on the positioning block, the positioning pin penetrates through the inserting hole to be matched with the adjusting hole, and the drain opening in the barrel bottom comprises a bend or a straight tube which is integrally formed with the barrel bottom; the bend or the straight tube is connected with a drain tube, and a sealing plug is arranged at an upper opening part of the bend or the straight tube.

The invention provides a high-efficiency wet type dust cleaning device for an oil pressing mill. The device comprises a vehicle body, a foot rest and a head end. The device has the advantages that byarranging a device storage box and a gas cleaning device, cleaning tools can be stored through the device storage box, a peculiar smell generated by the tools in the device storage box can be purifiedand exhausted through the gas cleaning device, and meanwhile gas exchange can to conducted through an air vent, so that the problem that the cleaning devices are not easy to store, and meanwhile thepeculiar smell generated by the cleaning devices cannot be purified and exhausted is avoided; by arranging a ground scraping device, oil stains and impurities on the ground of the oil pressing oil canbe scraped thoroughly through a scraper, and the problem that after cleaning, the oil stains and impurities still exit on the ground is avoided; by arranging a high pressure water spraying device, water can be drawn into a collector pipe through a water pump, a spiral nozzle is guided for spraying the water, pressurizing can be conducted through the spiral nozzle, and the problem that the water spraying pressure is too small, so that spray washing is not thorough is solved.

The invention discloses an adjustable training for children's rehabilitation, which comprises a stainless steel framework; the lower part of the stainless steel framework is welded with a ground wheel; a supporting cross beam is welded on the stainless steel framework, the upper part of the supporting cross beam is provided with a supporting plate, the surface of the supporting plate is coated with a leather; both sides of the leather are provided with screws, the leather is fixed on the supporting plate through screws at both ends, the lower part of the supporting plate is bonded with a battery through glue water; a transfusion pipe bracket is arranged on the adjustable training for children's rehabilitation and can support a transfusion pipe, a heating resistance wire is arranged on thesupporting plate of the adjustable training for children's rehabilitation, the supporting plate can be heated through the heating resistance wire; a holding box is arranged on the adjustable trainingfor children's rehabilitation, a user can place the carried water cups and other articles in the holding box, thus the use of the adjustable training for children's rehabilitation is more humanized.

The invention discloses bicycle triggering equipment, which comprises a supporting surface, a soft chair surface, a controllable trigger rod, a small movable ring, a large movable ring, a connecting end, a front wheel movable ring, a front wheel, a fixed rod, a rear wheel and a bearing rod. The supporting surface is arranged above one end of the soft chair surface. The rear wheel is arranged on one side of the soft chair surface. A bottom plate is arranged at the lower end of the soft chair surface. A telescopic rod is arranged at one end of the bottom plate. A telescopic buckle is arranged onthe outer surface of the telescopic rod. The bicycle triggering equipment is scientific and reasonable in structure, safe and convenient to use. A variable handle and a variable lock are arranged, while the distance between the soft chair surface and the controllable trigger rod can be adjusted. The problem that users feel uncomfortable to use the bicycle triggering equipment due to different heights and different arm lengths of users can be avoided. A rehabilitation training module is arranged. The rehabilitation training module can be used for foot exercise. The problem of muscle atrophy caused by the fact that the feet of a patient do not move for a long time is solved. A motor is used for power assistance. Therefore, the equipment is multifunctional, multipurpose and completely suitable for patients.

The invention provides a vehicle-mounted swivel chair which comprises a swivel chair base, an air spring hoisting mechanism, a cushion base and a hoisting control handle, wherein the air spring hoisting mechanism is connected with the upper part of the swivel chair base; a fixing connecting device for fixing with a floor of a vehicle-mounted shelter is arranged under the swivel chair base; the cushion base is connected with the air spring hoisting mechanism; a cushion is arranged on the cushion base; the hoisting control handle for controlling the air spring hoisting mechanism is arranged on the cushion base; a supporting plate component is arranged under the cushion base. The vehicle-mounted swivel chair has simple structure design and high structure stability and can meet the convenient use requirement of the researcher for the swivel chair in the vehicle-mounted shelter; the swivel chair can be easily fixed in the vehicle-mounted shelter; the swivel chair has the advantages of high stability, convenience in mounting, high detachability, long service life and high safety.

The invention discloses a multifunctional mobile toilet bowl, comprising a bearing bowl fixedly rested on a support frame; telescopic armrests are fixed on two sides of the support frame respectively, and a backrest is fixed to the rear of the support frame; a folding cover plate is connected to the rear end of the bearing bowl through a rotary shaft; a container is embedded in the bearing bowl and is a sewage bowl or a hip bath. When idle, the multifunctional mobile toilet bowl may serve as a common chair; the multifunctional mobile toilet bowl may be used as a toilet bowl just after the folding cover plate is opened; the multifunctional mobile toilet bowl may also serve as a fumigator; multiple purposes are imparted to the single multifunctional mobile toilet bowl, the functionality is diversified, and application cost is reduced for users.

The invention discloses a steel-skeleton polyurethane foaming chair which comprises a chair seat board and a back board, with chair legs being connected under the seat board, and is characterized in that the seat board and the back board are polyurethane foaming layers in which steel skeletons are embedded; the steel skeletons are steel pipes at the both sides of the back board and the seat board and the steel pipes at the both sides are connected by transverse steel sheets; the steel pipes and the steel sheets are fixed through the welding or the connection with rivets. Since the steel skeletons are embedded in the seat board and the back board, good rigidity, high mechanical strength and large bearing capacity of the steel skeletons can ensure that the chair can firmly stand and bear large pressure; furthermore, the polyurethane foaming layers are soft, elastic, smooth and slightly rough and can provide a soft and comfortable feeling for human bodies and are breathable; additionally, the chair wall is thicker than a plastic plate and the chair has an artistic appearance and can be applicable to houses, offices and hotels with a broad range of application and high grade.

The invention relates to a backrest of a vehicle seat, which consists of a backrest frame, a back board and a bubble plate. The conventional back board and a back sleeve are taken down and are not used. The back board is connected and fixed to the backrest frame. The back board is made of a transparent plastic material with toughness by die pressing casting. The bubble plate is adhered and fixed to the back board by an adhesive. The bubble plate is provided with a plurality of rows of bubbles with different sizes. The bubbles have an engorged tit shape so as to fulfill the aim of massaging back-shu points by vibration of a vehicle. The bubble plate is made of plastics with excellent elasticity so as to bring comfort to people and a headrest is also improved like the bubble plate. Therefore, the elastic backrest with transparent periphery and thicker middle part is made well.

The invention relates to a small-sized electric vehicle hub with an electromagnetic brake and a hollow tire. The small-sized electric vehicle hub comprises a small-sized electric vehicle hub body, thetire is arranged on the hub body, and a rotation shaft is arranged in the hub body; a spring sheet and a brake sheet are arranged on the outer wall of one side of the hub body, a coil shell is arranged on the rotation shaft at the same side of the brake sheet, and a coil is arranged in the coil shell; an electric vehicle controller is connected to the coil through a wire, a friction sheet is arranged on the inner side wall of the coil shell, during brake, the coil is powered on to generate a magnetic field, the brake sheet is attracted on the friction sheet through the elastic function of thespring sheet, and accordingly the hub body is braked. According to the small-sized electric vehicle hub, the magnetic field is generated through the coil, the brake sheet is attracted for braking accordingly, and the hub is good in performance and reliable in braking.

The invention relates to a backrest chair being able to cool the whole body. The backrest chair comprises a backrest chair body, the backrest portion of the backrest chair body comprises a front layer and a back layer, the front layer in contact with a user is a supporting layer, the supporting layer is provided with a plurality of air holes, the outer side of the supporting layer is provided with an L-shaped cooling layer, the inner side of the supporting layer is provided with a fan fixing layer, the middle position of the fan fixing layer is fixedly provided with a fan blowing toward the supporting layer, and the fan cooperates with the cooling layer to realize rapid cooling. The backrest chair has the characteristics of convenient use, simple structure and low cost.