36 results about "Somatotypes" patented technology

The invention belongs to the technical field of articles of daily use, and discloses a novel deck chair suitable for different somatotypes. The novel deck chair comprises a deck chair seat, a deck chair backrest, a deck chair telescopic body, armrests, a support pillar, a support base, support legs and traveling wheels, wherein the deck chair seat is connected with the deck chair backrest through a rotating shaft, the deck chair telescopic body is arranged in the inside hollow part of the deck chair seat in a matched manner, the armrests are mounted at the two sides of the middle part of the deck chair seat, the support pillar is arranged on the middle position of the lower surface of the deck chair seat, the lower end of the support pillar is fixed to the support base, the support legs are arranged on the lower surface of the deck chair telescopic body, a cross bar is arranged between the support legs, and the traveling wheels are arranged on the lower surface of the support base and the lower surfaces of the support legs. The novel deck chair is simple in structure and practical in function, and suitable for use by people with different somatotypes; the angle between the deck chair seat and the deck chair backrest can be conveniently adjusted, so that the optimum angle can be found, and thus the comfort is increased; and a pillow adjustable in position is arranged, so that the muscle on the neck of the user is relax, and thus the user obtains the high-quality rest.

The invention discloses a solar-optothermal-groove-type large-opening double-layer parabola high-efficiency collector. The collector comprises a tripod main beam, a plurality of condenser units and a heat-collecting pipe, wherein the plurality of condenser units are fixed on the tripod main beam side by side, and the light-gathering focal point of each condenser converges on the heat-collecting pipe; each condenser unit comprises a pair of outside condenser and inside condenser which are mutually arranged at interval, and an airflow channel is formed between the outside condenser and the inside condenser. The collector provided by the invention mainly utilizes the techniques such as, a parabola light-gathering principle, strong torsibility of a tripod welding frame main beam, high precision of a parabolic mould pressing and improvement on the wind resistance grade of the collector through changing the wind loading somatotype coefficient of the collector, so that the collector providedby the invention has the advantages of high light-condensing precision, high heat collection efficiency, strong wind resistance capability and low power station whole construction cost.

The invention discloses a method for breeding pig breeds of Meiling black pigs. The method comprises the following steps that (1) excellent piglets are selected as reserved backup pigs on the 20th day after the birth of the piglets; (2) the secondary optimization screening is carried out after fourth month of the reserved backup pig selection, and high-quality stock pig breeds are selected; (3) when the body weight of the selected high-quality stock pig breeds is increased to 50kg, the selection remaining and the elimination are carried out by utilizing the integral selection indexes and referring to the genealogical ancestry and the somatotype appearance according to the individual and compatriot performance test results, and backup pig groups are selected and formed; (4) male pigs and female pigs in the backup pig groups can mate according to requirements, and pigs with poor growth and development conditions, genetic diseases and breeding difficulty are weeded out. The method for breeding pig breeds of Meiling black pigs is set out according to the actual characteristics of the pig breeds of the Meiling black pigs. When the method for breeding pig breeds of Meiling black pigs is adopted, the purebred pig breeds of Meiling black pigs with good properties and stable hereditary feature can be selected, and the social benefits and the economic benefits are obvious.

The invention discloses preparation, detection and application of a polyclonal antibody of a Yam mild mosaic virus (YMMV). Based on a YMMV genome, the inventor purifies a nuclear inclusion protein / coat protein (NIb / CP) of the YMMV through prokaryotic expression and uses the nuclear inclusion protein / coat protein to prepare the polyclonal antibody for an immune rabbit. The polyclonal antibody can specifically identify the Nib / CP protein of YMMV through prokaryotic expression and the Nib / CP protein of the YMMV virus which infects common yam rhizome, and generates specific immunity response. On the basis, the inventor further builds a set of efficient, high sensitive and accurate IC-RT-PCR (Immunocapture-Reverse Transcription-Polymerase Chain Reaction, ELISA (Enzyme-Linked Immuno Sorbent Assay) and Western blot methods which can specifically detect the YMMV from a common yam rhizome plant which is infected by YMMV. By applying the invention, a material basis and a technical support can be provided for research on interaction of the YMMV and the host, quick detection of the virus and somatotype and molecular biology study, thereby laying a solid foundation for epidemiologically monitoring and preventing treating the virus.

A mapping method for design costume paper sample according to planar construction of structural plan comprises: design and mapping according to structural plan planar construction of XOY geometry plane, position point, position, bisector, position computing formula, position design formula, position point decomposition formula, dart and wimple, structure outline and sutural line; selecting proportion to perform grade difference mapping of costume paper sample according to costume specification grade difference; selecting becoming amount to ascertain the shape of costume; select adjusted value to perform costume paper sample design and protraction according to the pattern, shape, and molding of costume, and somatotype; arranging dart and wimple according to pattern, shape and molding represence of costume; selecting becoming fitting to form costume paper sample pattern. Position of position point is restricted by the costume specification. Position of structure line point is free from restriction.

The invention provides a tick nest type PCR (Polymerase Chain Reaction) specific primer and a tick nest type PCR identification method. A more sensitive nest type PCR method is adopted; a single tick, even a trace genome DNA (Deoxyribonucleic Acid) extracted from partial tissue organs of the tick, can be used as a template and is used for identifying; somatotype and system evolution analysis on the tick is carried out on a gene level; in the nest type PCR identification method, a first round only needs 10 cycles and a second round needs 25 cycles, so that time needed by two turns of simple common PCR is shortened.

The invention relates to a diameter-changing swimming ring. The diameter-changing swimming ring comprises a ring body, wherein the ring body comprises a supporting ring and an air sac ring sleeving the outer side of supporting ring; a diameter changing mechanism is arranged in the supporting ring, and comprises an upper annular plate, a rotating annular plate and a lower annular plate which are sequentially arranged in parallel, and the upper annular plate, the lower annular plate and the supporting ring are fixedly connected; the rotating annular plate is rotationally connected to the lower annular plate; a deflector rod is arranged on the rotating annular plate; a deflecting groove matched with the deflector rod is arranged on the upper annular plate; a plurality of rotating columns are arranged on the rotating annular plate around the circle center; a rotatable adjusting blade is arranged on each of the rotating columns; the adjusting blades are sequentially overlapped around the circle center of the rotating annular plate, so that a human body accommodating space of which the area can be changed through rotating the adjusting blades is formed by surrounding of the inner side edges of the adjusting blades; a limiting column is arranged on each adjusting blade; a plurality of arc-shaped limiting grooves are formed in the upper annular plate; and each limiting column is arranged in the corresponding limiting groove in a penetrating manner for sliding connection. According to the structure of the diameter-changing swimming ring disclosed by the invention, the diameter size can be changed according to the somatotype requirements.

The invention relates to a human body physique clustering method based on a factor analysis and a probabilistic neural network. The method comprises the following steps of collecting static human bodynet body data and constructing a human body database; determining 27 basic variables according to the actual and research needs of the clothing industry; using the factor analysis to reduce the dimensionality of the 27 basic variables, and according to the cumulative contribution rate of principal components, extracting the factor scores of the top N principal components with contribution rate greater than 80%; constructing a probabilistic neural network model of human body physique clustering, wherein the factor scores of the top N principal components is an input layer, and an output layeris the category code of a human body physique; clustering the human body physique based on the factor scores and the probabilistic neural network. The method can directly and effectively classify human body physiques.

The invention discloses a method and a device for constructing an intelligent sports training model, a training method and a device. The somatotype recognition model is obtained by training the annotated somatotype data through in-depth learning. Obtaining the annotated normalized posture movement data; The standard posture recognition model is obtained by training the labeled standard posture data in depth learning. Acquiring annotated limb movement data; Through in-depth learning and training of the annotated limb movement data, the limb movement recognition model and the corresponding limbmovement correction model are obtained. The invention can be trained to obtain various models so as to be called before and during the user sports training. A preliminary exercise training plan can begiven according to the user's body shape before the user's exercise training, and in the process of the user's exercise training, the specific parts with inconsistent movements can be located throughthe human body gesture recognition, and the user is prompted to make corrections precisely.

The invention discloses a senile disease clinical treatment device. The senile disease clinical treatment device comprises a bar-shaped plate, wherein a sliding groove is formed in the side surface ofthe bar-shaped plate; extension plates are respectively arranged at the upper end and the lower end of the inner part of the sliding groove in a sliding manner; an arc-shaped groove is formed in theright side surface of each extension plate; a connecting device is arranged on the upper surface of the extension plate on the upper side; a first clamping piece of the connecting device is fixedly connected with the extension plate on the upper side; a first fixing device is connected to a column-shaped nut of the connecting device; a screw rod of the first fixing device is in threaded connectionwith the column-shaped nut; a third clamping piece is arranged on the lower surface of the extension plate on the lower side; the third clamping piece is rotatably connected with a fourth clamping piece; and a second fixing device is arranged on the side surface of the fourth clamping piece. The senile disease clinical treatment device disclosed by the invention is simple in structure, and convenient to fix and carry; the length of the senile disease clinical treatment device can be regulated, so that the senile disease clinical treatment device can perform the operation of correcting on patients of different somatotypes; and when the patient walks and sits, the senile disease clinical treatment device can perform the operation of correcting, so that the treatment effect is improved, thetreatment cycle is shortened, and the using is convenient.

The invention discloses an individual haplotype rebuilding method based on an optimization solution assembling, which comprises the following steps: pre-processing a single nucleotide polymorphism matrix, removing redundant information which is helpless for a rebuilding work, obtaining a SNP matrix which only includes heterozygous locus numbers. A small scale optimization solution assembling is obtained by a particle group optimization strategy, that is, a haplotype pair assembling with only heterozygous locus numbers. The invention provides an individual haplotype rebuilding method based on a small scale optimization solution assembling solving MEC mould. The method can obtain more high haplotype rebuilding rate than bygone relative methods, and still processes relative high execution efficiency in solving large scale problems.

A measurement patch device may change length according to somatotype of a user, and may be joined with another measurement patch device integrally according to the need of different physiological lead measurement. Moreover, the two joined measurement patch devices may rotate with respect to each other, such that multi-channel or multi-lead physiological signal may be measured to save measurement time of physiological signal.

The invention discloses an improved Grocott silver hexosamine staining method and applications thereof. The staining method comprises the steps of preparing paraffin-embedded sections, staining, carrying out dehydrated hyalinizing, and carrying out section sealing, wherein in the step of preparing paraffin-embedded sections, a sliced paraffin section is adhered to a glass slide subjected to APES treatment. The method overcomes the defect that section shedding easily occurs in the process of staining, especially for frankliniella occidentalis with a small somatotype, the non-section-shedding rate is over 70%. In addition, the internal tissues of polypides in sections obtained according to the staining method disclosed by the invention are red, blastospores in polypides are black, therefore, the polypides are clearly visible, and the staining effect is excellent.

The invention discloses a device for correcting humpback and excising pectoral muscles. The device comprises a back board 1, a base 2, moving shafts 3 arranged on the two sides of the base, a left rocker arm 4, a right rocker arm 4, a tension spring 5 and a waist band 6. The back board 1 corresponds to the area of the back of the human body. The rocker arms 4 form a lever principle with the moving shafts 3 as the fulcrum. The tension spring 5 tensions the tails of the two rocker arms 4, and then loading force opposite to the motion of the handheld parts is formed and can be adjusted according to the number or the thickness of the tension spring. The device is simple in structure, low in cost, and convenient to use. The human body structure can be combined, the pectoral muscles are excised by the utilization of the lever principle, and the pectoral muscles are strengthened. The acting force generated when the pectoral muscles are excised can be combined with the counter acting force of the back board, the acting force and the counter acting force of the back board jointly act on the lumbar spinal cord and the spine, and bad somatotypes of the humpback and the rachitic back can be effectively corrected.

The invention discloses a suffocation preventing bird-nest-shaped bed for newborns. The suffocation preventing bird-nest-shaped bed comprises a main body housing, wherein a somatotype groove is formedin a position close to the middle position, of the upper end surface of the main body housing, a thickening flannelette is arranged at the edge position of the inner surface of the somatotype groove;a head and neck air bag is arranged at a position close to the upper end, of the middle position of the inner side of the somatotype groove; a shoulder and buttock air bag is arranged at a position close to the middle end, of the middle position of the inner side of the somatotype groove, and a leg air bag is arranged at the position close to the lower end, of the middle position of the inner side of the somatotype groove. The suffocation preventing bird-nest-shaped bed for newborns can change different body positions of the newborns, can meet different using requirements, can effectively regulate the body positions to the most comfortable state of the newborns, can complete effective support for different body parts, can prevent the phenomenon of suffocation of the newborns, and can enable the newborn to have the feeling of being packed and embraced. Enough safety sense can be provided for the newborns, and along with the body position change of the newborns, the body position is controlled in real time, and the safety is guaranteed.

The invention relates to a chair capable of changing with the setting posture of human body, belonging to the technical field of human living necessity. The chair comprises chair surfaces and a support, wherein the chair surfaces are folded together to form an upper chair surface and a lower chair surface; and the support comprises a leg-part supporting bar, a chair surface supporting bar and a back supporting bar which are prepared from a tube. The upper chair surface is fixed relatively to the back supporting bar, and the lower chair surface is fixed relatively to the chair surface supporting bar. The chair surface of the chair capable of changing with the setting posture of human body is folded to ensure that the chair can vary with the setting posture of human body and ensure that people can feel comfortable. Different sizes of chairs can be produced according to the human engineering data, thus ensuring that the chair can adapt to different somatotypes of people and the chair is suitable and comfortable. The chair of the invention has simple production technology and convenient packaging and assembly and can be widely applied in meetings, offices, households, etc.

The invention discloses a leg pressing device for dance practice. The leg pressing device comprises a baseplate, a positioning ring, a first lifting push rod, a first fixed ring, a fixing strap, a second lifting push rod, a foot rest, an air pump, a second fixed ring, a fixed air sac, a placing stand, and a regulating switch. The leg pressing device is smart in structure, and powerful in function, the purpose that a practicer can freely adjust the height of the leg pressing device during the practice of a side leg can be realized, and the fixed air sac, a positioning air sac and the fixing strap have powerful plasticity, so that the leg pressing device can meet training requirements of practicers with different heights, ages and somatotypes; all of contact positioning is soft contact, the generation of pull and other damages are avoided, and the training safety is improved.

The invention relates to a human body fixing device for a lumbar vertebra traction bed body, belongs to the technical field of medical apparatuses, and aims to overcome the defect that an upper limb fixing mechanism of a conventional lumbar vertebra traction bed cannot be flexibly adjusted in accordance with patients of different somatotype conditions. The human body fixing device comprises a bedhead traction hook fixing frame, traction hooks, traction sliding pipes and a bed body, wherein the bed head traction hook fixing frame is mounted at the top end of the bed body; the traction slidingpipes are respectively mounted at the left end and the right end of the bed head traction hook fixing frame, and can do up-and-down pitching motion and left-and-right swinging motion relative to the bed head traction hook fixing frame; one end of each traction hook is inserted in the corresponding traction sliding pipe in a sliding manner, and can do front-and-rear stretching motion relative to the corresponding traction sliding pipe; and a limiting and fixing device is mounted on each traction sliding pipe, and can limit the mounting position of the corresponding traction hook in the corresponding traction sliding pipe. According to the human body fixing device disclosed by the invention, the upper limb fixing mechanism of the lumbar vertebra traction bed is reasonably designed, and the human body fixing device has the advantages of being compact in structural configuration, reasonable in design and high in adaptability.

The invention discloses salted instant dried hemisalanx prognathus capable of invigorating the stomach and clearing heat and a preparation method of the salted instant dried hemisalanx prognathus. The salted instant dried hemisalanx prognathus is prepared from the following raw materials in parts by weight: 500-550 parts of hemisalanx prognathus, 10-12 parts of iodised salt, 15-18 parts of white granulated sugar, 50-60 parts of Baijiu, 10-12 parts of ginger powder, 30-35 parts of mashed garlic, 15-18 parts of perilla herb oil, 10-12 parts of fresh peppers, 15-18 parts of anodonta clam shell-powder, 200-230 parts of fresh lotus root pulp, 30-35 parts of soaked ginger granules, 10-12 parts of dried orange peel, 15-18 parts of red jujubes and 5-6 parts of perilla leaves. The prepared salted instant dried hemisalanx prognathus disclosed by the invention is rich in fragrance, crisp in bones, fragrant in meat, moderate in salty taste, chewy, free from fishy smell, plump in somatotype, free from wrinkles or crinkles, and fresh, fragrant, crisp and delicious.

The invention provides a tick nest type PCR (Polymerase Chain Reaction) specific primer and a tick nest type PCR identification method. A more sensitive nest type PCR method is adopted; a single tick, even a trace genome DNA (Deoxyribonucleic Acid) extracted from partial tissue organs of the tick, can be used as a template and is used for identifying; somatotype and system evolution analysis on the tick is carried out on a gene level; in the nest type PCR identification method, a first round only needs 10 cycles and a second round needs 25 cycles, so that time needed by two turns of simple common PCR is shortened.

The invention discloses salted instant dried hemisalanx prognathus capable of drifting fragrance and clearing grease and a preparation method of the salted instant dried hemisalanx prognathus. The salted instant dried hemisalanx prognathus is prepared from the following raw materials in parts by weight: 500-550 parts of hemisalanx prognathus, 10-12 parts of iodised salt, 15-18 parts of crystal sugar, 50-60 parts of Baijiu, 10-12 parts of ginger powder, 30-35 parts of mashed garlic, 20-23 parts of loquat flower honey, 10-12 parts of folium llicis latifoliae, 13-15 parts of wrinkled gianthyssop herb water, 30-35 parts of soaked ginger granules, 30-35 parts of deep sea fish oil, 30-35 parts of puffed pumpkin seed kernel powder, 30-35 parts of apple vinegar, 13-15 parts of lotus leaves processed with vinegar, 10-12 parts of bitter gourd slices, 5-6 parts of lemon grass, 10-12 parts of fermented glutinous rice and 50-60 parts of grape wine. The salted instant dried hemisalanx prognathus disclosed by the invention is rich in fragrance, crisp in bones, fragrant in meat, moderate in salty taste, chewy, free from fishy smell, plump in somatotype, free from wrinkles or crinkles, and fresh, fragrant, crisp and delicious.

The invention discloses a preparation method of a pig feed for improving the pork quality of Huai pigs. Myriophyllum elatinoides gaudich has the characteristics of being dark green, juicy, delicate, good in palatability, high in digestibility and the like. According to the preparation method disclosed by the invention, the myriophyllum elatinoides gaudich is pulped, then fermentation through beneficial bacteria is performed, and fermentation liquor has high content of organic peptide and multiple kinds, and can be digested and utilized by the Huai pigs; when the fermentation liquor cooperates with a base material for use, the cost can be reduced, besides, the growth and the development of the pigs can be facilitated, and the constitutions can be improved; proportion components in the base material are appropriate, and various nutrients desired by the Huai pigs in the growth process are met; and in addition, through coix seed oil and composite trace elements, the level of various hormones in the growth process of the pigs is changed, and various nutrient components in the development of fattening pigs are stimulated to generate useful improvement. Through the adoption of the feed provided by the invention, the lean meat percentage of the fattening pigs can be increased, the somatotype is good, improvement of meat quality is realized, and market requirements are met.

The invention relates to an elastic batten used for a bedstead. The elastic batten comprises a glass fiber frame bar and a plastic frame plate, the glass fiber frame bar is used for mainly bearing force, the cross section of the glass fiber frame bar is in a groove shape, and the glass fiber frame bar is wrapped by the plastic frame plate; the glass fiber frame bar comprises an upper plate body and reinforcing bodies arranged at the two side ends of the upper plate body, and a reinforcing groove is formed by the two reinforcing bodies and the upper plate body; the plastic frame plate comprises an upper plastic plate for wrapping the upper plate body and plastic reinforcing supporting legs for wrapping the reinforcing bodies. The elastic batten serves as an assembly for forming a mattress, is simple in structure and convenient to install and has a soft elasticity effect, battens can be directly arrayed on the bedstead to form an elastic bed plate, the strength of a main core part and hardness of the elastic batten can be selected according to individual somatotype, mattress cost is reduced, and the human skeleton is reasonably and effectively supported at natural curvature; the elastic batten has the advantages of being high in elasticity and large in endurance, preventing deformation and fracture, improving air convection inside and outside an elastic bed plate structure and prolonging the service life of the elastic bed plate structure.

The invention discloses a CT scanning protective housing, a CT scanning table, a CT scanning protective system and a CT scanning system. The CT scanning protective housing is provided with a protective housing body and a protective housing cover, wherein the protective housing cover is provided with an inlet / outlet in one end of the CT scanning table in the transmission direction, a switching system is arranged at the inlet / outlet, and the switching system is provided with a protective switching mechanism in a matching manner. The protective housing is manufactured from transparent lead glass,the protective housing is used for separating a CT machine from illuminating other most of positions outside of tested positions of a testee, and damage of X rays to human bodies is reduced. Becausethe positions of the human bodies are different in size, the gaps between each of the positions and the inlet / outlet are also different, and through the switching system, an appropriate guard gate canbe mounted in a matching manner according to the detection position and the somatotype size of the testee, so that the gap between the inlet / outlet and the human bodies can be shielded, and the radiation amount of illumination to the human bodies can be further reduced.

The invention discloses a leg pressing device for dance practice. The leg pressing device comprises a baseplate, a positioning ring, a first lifting push rod, a first fixed ring, a fixing strap, a second lifting push rod, a foot rest, an air pump, a second fixed ring, a fixed air sac, a placing stand, and a regulating switch. The leg pressing device is smart in structure, and powerful in function, the purpose that a practicer can freely adjust the height of the leg pressing device during the practice of a side leg can be realized, and the fixed air sac, a positioning air sac and the fixing strap have powerful plasticity, so that the leg pressing device can meet training requirements of practicers with different heights, ages and somatotypes; all of contact positioning is soft contact, the generation of pull and other damages are avoided, and the training safety is improved.

The embodiment of the invention provides an image processing method and a terminal device, which relate to the technical field of communication, so as to solve the problem that the process of beautifying a portrait image is tedious and time-consuming. The method includes acquiring a first body shape parameter for adjusting the body shape of a target object in a first image; generating M second images according to the first image, the first somatotype parameter and the M individual somatotype model, wherein each of the second images includes the target object, and in a different second image, the target object has a different size, M is a positive integer; displaying a target image, the target image being an image determined from the M second images, the target object in the target image having a size different from that of the target object in the first image.

The invention provides a back governor meridian moxibustion device. According to the adoption of the technical scheme of the back governor meridian moxibustion device disclosed by the invention, a wooden box fixing mode of medicinal materials is rejected, flexible board materials having fire resistance property are used for surrounding to form a frame structure; medicinal materials including bruised ginger, moxa and the like are accommodated in the flexible frame, so that the back governor meridian moxibustion device is in well fit with back shape of the human body; besides, the materials haveflame resistant characteristics and light weight characteristics, so that the problems that in the treatment process, the frame is combusted, and pressing sense to the back of the human body is generated, can be solved; in addition, the frame is formed through a mode of connecting baffles in an inserting manner, so that the back governor meridian moxibustion device can be adjusted according to the somatotype of the human body and can also be convenient to disassemble; and on the foundation, the back governor meridian moxibustion device innovatively introduces a temperature measurement module,so that the temperature of medicinal materials is detected in a real-time manner, the treatment process can be accurately determined according to the temperature of the medicinal materials, and the treatment accuracy is improved. Through the adoption of the back governor meridian moxibustion device disclosed by the invention, the operation process of naturopathy of traditional governor meridian moxibustion is reserved, and functional characteristics of the naturopathy are also perfected, so that the governor meridian moxibustion device is simple and convenient to operate, practical and humanized.

The invention belongs to the technical field of breeding, and particularly relates to a Chinese herbal medicine feed additive capable of promoting skeletons of piglets to be enlarged, as well as a preparation method and application method of the Chinese herbal medicine feed additive. The Chinese herbal medicine feed additive capable of promoting skeletons of piglets to be enlarged consists of thefollowing components in percentage by weight of 85-90% of Chinese herbal medicine raw materials and 10%-15% of an enzyme preparation. A natural plant ultramicro wall-breaking and crushing technique isadopted, so that effective components are sufficiently released, the Chinese herbal medicine feed additive is safe, reliable and environmental-friendly, the skeletons of the piglets can be enlarged,the somatotype of the piglets is fat and strong, and calcium absorption and phosphorus absorption are good; and daily food consumption and daily gain are increased, and economic benefits in the wholecourse are increased.

The invention relates to a chair capable of changing with the setting posture of human body, belonging to the technical field of human living necessity. The chair comprises chair surfaces and a support, wherein the chair surfaces are folded together to form an upper chair surface and a lower chair surface; and the support comprises a leg-part supporting bar, a chair surface supporting bar and a back supporting bar which are prepared from a tube. The upper chair surface is fixed relatively to the back supporting bar, and the lower chair surface is fixed relatively to the chair surface supporting bar. The chair surface of the chair capable of changing with the setting posture of human body is folded to ensure that the chair can vary with the setting posture of human body and ensure that people can feel comfortable. Different sizes of chairs can be produced according to the human engineering data, thus ensuring that the chair can adapt to different somatotypes of people and the chair is suitable and comfortable. The chair of the invention has simple production technology and convenient packaging and assembly and can be widely applied in meetings, offices, households, etc.