CN112471801A

CN112471801A - Chair capable of adjusting front and back inclination angles of seat plate

Info

Publication number: CN112471801A
Application number: CN202011345395.0A
Authority: CN
Inventors: 吴敏娜
Original assignee: Hangzhou Haoran Apartment Co ltd
Current assignee: Hangzhou Haoran Apartment Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-03-12

Abstract

The invention discloses a chair capable of adjusting the front and back inclination angles of a seat plate, which comprises a base, a first rebound structure and a clamping structure; base: its top surface rotates and is connected with the rotary disk, the top surface array of rotary disk has telescopic link two, and two tops of the telescopic link of array are fixed with mounting panel two, the bottom of mounting panel two is fixed with the bottom plate, the both sides of bottom plate are fixed with the frame respectively, are fixed with the swash plate between the front side of two frames, and the rear side top of two frames is fixed with the fixed axle, the fixed axle rotates and is connected with bedplate and back, and the bedplate setting is between the top of two frames, and not only the bedplate can kick-back automatically, and is easy and simple to handle, and when adjusting the bedplate, the back can keep the angle with the bedplate, and self can independently adjust inclination again, more facilitates the use.

Description

Chair capable of adjusting front and back inclination angles of seat plate

Technical Field

The invention relates to the technical field of chairs, in particular to a chair with an adjustable front-back inclination angle of a seat plate.

Background

The chair is daily life furniture, a seat with a backrest and armrests, modern chairs pursue beauty and fashion, some chairs are not only seats but also more technologies, so that the human beings are more convenient, and the chair can not leave the lives of people;

in the prior art, the seat board of a common chair is generally horizontal and fixed, however, the study of human engineering shows that when a person sits on the chair and works while lying on a table, the body of the person tends to naturally tilt forward, the posture is easy to concentrate the mind of the person, and the body of the person is used to lean backwards and lean against the chair back to relax the body when the person is resting on the table, so that the angle of the seat board of the chair is fixed, the requirement that the body of the person naturally tilts forward when the person works while lying on the table can not be well met, and the chair capable of adjusting the front and back tilt angles of the seat board;

the chair of inclination around the current adjustable bedplate can not kick-back automatically, needs artifical manual regulation, troublesome poeration, and current chair of inclination around the adjustable bedplate when the bedplate is adjusted, back and bedplate can not keep the angle, and self can not adjust inclination, inconvenient use moreover.

Disclosure of Invention

The invention aims to overcome the technical problem of the prior art, provides a chair capable of adjusting the front and back inclination angles of a seat plate, and has the advantages that the seat plate can automatically rebound, the operation is simple and convenient, in addition, the backrest can keep the angle with the seat plate when the seat plate is adjusted, the inclination angle can be independently adjusted, the use is more convenient, and the problems in the background technology can be effectively solved.

In order to achieve the purpose, the invention provides the following technical scheme: the chair capable of adjusting the front and back inclination angles of the seat plate comprises a base, a first rebound structure and a clamping structure;

base: the top surface of the rotary disc is rotatably connected with a rotary disc, a second telescopic rod is arranged on the top surface of the rotary disc in an array mode, a second mounting plate is fixed at the top end of the second telescopic rod of the array mode, a bottom plate is fixed at the bottom of the second mounting plate, frames are fixed on two sides of the bottom plate respectively, an inclined plate is fixed between the front sides of the two frames, a fixing shaft is fixed at the top of the rear side of the two frames, the fixing shaft is rotatably connected with a seat plate and a backrest, the seat plate is arranged between the top of the two frames, the backrest is vertically arranged at the top of the rear side of the frames, a first rebound structure is arranged;

the first rebound structure: the seat plate comprises a first mounting seat, a first supporting seat, matching teeth, a first limiting plate, a first spring, a first telescopic rod and a second limiting plate, wherein the supporting seat is fixed at the bottom of the front side of the seat plate, the first limiting plate is movably connected to the bottom of the supporting seat, the first telescopic rod is fixed to the bottom surface of the first limiting plate, the second limiting plate is fixed to the lower end of the first telescopic rod, the first mounting seat is fixed to the side surface of the second mounting plate, the second limiting plate is movably connected to the inside of the first mounting seat, the first spring is sleeved on the side surface of the first telescopic rod, the supporting seat is of an arc-shaped structure, and;

the clamping structure is as follows: the inclined plate clamping device comprises a spring II, a connecting rod, a sleeve frame, a clamping block, a clamping chuck, a connecting shaft, a first mounting plate and a straight gear, wherein the first mounting plate is fixed on the side surface of the top of the second mounting plate, the top of the first mounting plate is rotatably connected with the connecting shaft, the straight gear is fixedly connected with one end of the connecting shaft, the straight gear is meshed with a matching gear, the clamping chuck is fixed at the other end of the connecting shaft, the sleeve frame is fixed on the side surface of the inclined plate, the clamping block is slidably connected inside the sleeve frame, the spring II is arranged between the rear side of the clamping block and the bottom inside the sleeve frame, the clamping block is clamped with the clamping chuck, the connecting rod is;

the first springback structure is mainly characterized in that the first spring rebounds, the first telescopic rod extends, the first telescopic rod pushes the first limiting plate to rise, the first limiting plate pushes the supporting seat to rise, the supporting seat pushes the seat board to rotate, and when the chair is adjusted and a human body does not press, the seat board rebounds automatically in the mode, manual adjustment is not needed, and operation is simpler and more convenient; the clamping structure is mainly used for clamping the chuck, so that the connecting shaft is fixed and does not rotate, and finally the supporting seat is locked to position the seat plate.

Further, still include resilience structure two, it contains arc sleeve, spring three, arc slide bar, arc, mount pad two and connection frame, the bottom fixedly connected with connection frame of back, the side fixedly connected with arc of connection frame, the bottom surface of bedplate is fixed with the arc type sleeve, the top head of arc is fixed with the arc slide bar, arc slide bar and arc sleeve sliding connection, the telescopic side cover of arc has spring three, the bottom surface fixedly connected with mount pad two of bedplate, the side-mounting of mount pad two has location structure, and resilience structure two mainly provides the resilience force and makes the back when adjusting, can paste tight back.

Furthermore, the positioning structure comprises a spring IV, a rotating seat, a mounting seat III, a sliding column, a positioning column and a positioning hole, the positioning hole is arranged on the side surface array of the arc-shaped plate, the mounting seat III is fixed on the side surface of the mounting seat II, the rotating seat is movably connected inside the mounting seat III, the spring IV is arranged between one side of the rotating seat and the mounting seat II, the sliding column is connected inside the other side of the rotating seat in a sliding manner, the positioning column is fixed in the middle of the sliding column and is inserted into through holes in the two side surfaces of the mounting seat, the positioning column is matched with the positioning hole for use, an adjusting handle is fixed in the middle of the side surface of the rotating seat, the mounting seat II fixed on the bottom surface of the seat plate and the arc-shaped plate do not generate relative displacement through the matching of the positioning column and the positioning hole, and further when the seat plate, when only adjusting the back, make the reference column follow the inside roll-off of locating hole through adjustment handle, can make arc and mount pad two can produce relative displacement, realize the inclination of self and adjust, more convenient to use.

Further, still include the handrail unit, it contains handrail board, slide bar, locking knob and sideboard, and the top correspondence of two frames is fixed with two sideboard, the sideboard top surface is equipped with two slide holes, and corresponds two slide bars of sliding connection in two slide holes, and the top of two slide bars is fixed with handrail board, the rear side threaded connection of sideboard has the locking knob, the inner of locking knob and the side extrusion fit of one of them slide bar, the handrail unit mainly is the height that can change handrail board through the locking knob.

Further, the handrail unit still includes the cooperation groove, the top surface of sideboard is equipped with the cooperation groove, the cooperation groove cooperatees with the handrail board of homonymy, and the cooperation groove can hide the handrail board inside, and the accessible is hidden and is become the chair that does not have the handrail.

Further, still include the altitude mixture control unit, it contains hand wheel, worm wheel, lead screw and threaded sleeve, the top surface of rotary disk is fixed with threaded sleeve, the bottom surface of mounting panel two is rotated and is connected with the lead screw, lead screw and threaded sleeve threaded connection, the top of lead screw is fixed with the worm wheel, the top surface of mounting panel two is rotated through the fixed plate and is connected with the worm, worm and worm wheel meshing, the hand wheel of axis body fixedly connected with is passed through to the one end of worm, and the altitude mixture control unit mainly is the height of adjusting the bedplate.

Furthermore, the clothes rack further comprises a partition board, wherein the partition boards are fixed on two sides of the bottom surface of the seat board respectively, the side surfaces of the partition boards are attached to the side surfaces of the side boards on the same side, and the partition boards mainly prevent clothes and the like from being clamped in a gap between the side boards and the seat board.

Furthermore, the chair also comprises universal wheels, supporting legs are arranged on the side surface array of the base, the lower ends of the supporting legs are rotatably connected with the universal wheels, and the universal wheels are mainly used for facilitating the movement of the chair with the adjustable seat plate and the front and back inclination angles.

Furthermore, still include the headrest, the top of back is fixed with two dead levers, and swing joint has the headrest between two dead levers, and the headrest mainly increases the travelling comfort.

Furthermore, the backrest also comprises a breathable net, the middle of the front side face of the backrest is provided with a breathable hole, the port of the breathable hole is fixedly provided with the breathable net, and the breathable net can ventilate the back of a human body, so that the comfort is improved.

Compared with the prior art, the invention has the beneficial effects that: this inclination's chair around adjustable bedplate has following benefit:

1. according to the chair capable of adjusting the front-back inclination angle of the seat plate, the first spring rebounds, the first telescopic rod extends, the first telescopic rod pushes the first limiting plate to ascend, the first limiting plate pushes the supporting seat to ascend, the supporting seat pushes the seat plate to rotate, when the chair is adjusted, when a human body does not press, the seat plate rebounds automatically in the mode, manual adjustment is not needed, and the operation is simpler and more convenient;

2. according to the chair capable of adjusting the front-back inclination angle of the seat plate, the positioning column is matched with the positioning hole, so that relative displacement is not generated between the mounting seat II fixed on the bottom surface of the seat plate and the arc-shaped plate, the backrest and the seat plate synchronously rotate when the seat plate rotates, the angle is kept, and when only the backrest is adjusted, the positioning column slides out of the positioning hole through the adjusting handle, so that the arc-shaped plate and the mounting seat II can generate relative displacement, the self inclination angle adjustment is realized, and the chair is more convenient to use;

3. this inclination's chair around adjustable bedplate, not only the bedplate can kick-back automatically, and is easy and simple to handle, when adjusting the bedplate, the back can keep the angle with the bedplate moreover, and self can independently adjust inclination again, more facilitates the use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a resilient structure of the present invention;

FIG. 3 is a schematic structural view of the clamping structure of the present invention;

FIG. 4 is a schematic structural view of a second resilient structure of the present invention;

fig. 5 is a schematic structural diagram of the positioning structure of the present invention.

In the figure: 1 base, 2 rotating disc, 3 rebounding structure I, 31 mounting seat I, 32 supporting seat, 33 matching teeth, 34 limiting plate I, 35 spring I, 36 telescopic rod I, 37 limiting plate II, 4 clamping structure, 41 spring II, 42 connecting rod, 43 sleeve frame, 44 clamping block, 45 clamping chuck, 46 connecting shaft, 47 mounting plate I, 48 straight gear, 5 rebounding structure II, 51 arc sleeve, 52 spring III, 53 arc slide rod, 54 arc plate, 55 mounting seat II, 56 connecting frame, 6 positioning structure, 61 spring IV, 62 rotating seat, 63 mounting seat III, 64 slide column, 65 positioning column, 66 positioning hole, 7 armrest unit, 71 armrest plate, 72 slide rod, 73 locking knob, 74 side plate, 75 matching groove, 8 height adjusting unit, 81 hand wheel, 82 worm, 83 worm wheel, 84 lead screw, 85 threaded sleeve, 9 adjusting handle, 10 universal wheel, 11 telescopic rod II, 12 mounting plate II, 9 side plate, 35 spring II, 4 clamping structure, 41 spring II, 42 connecting rod, 13 seat boards, 14 headrests, 15 frames, 16 backrests, 17 breathable nets, 18 partition boards, 19 bottom boards and 20 inclined boards.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the chair capable of adjusting the front-back inclination angle of the seat plate comprises a base 1, a first rebound structure 3 and a clamping structure 4;

base 1: the rotary disc 2 is rotatably connected to the top surface of the rotary disc 2, a second telescopic rod 11 is arrayed on the top surface of the rotary disc 2, a second mounting plate 12 is fixed to the top end of the second telescopic rod 11 of the array, a bottom plate 19 is fixed to the bottom of the second mounting plate 12, frames 15 are respectively fixed to two sides of the bottom plate 19, an inclined plate 20 is fixed between the front sides of the two frames 15, a fixed shaft is fixed to the top of the rear sides of the two frames 15 and is rotatably connected with a seat plate 13 and a backrest 16, the seat plate 13 is arranged between the top portions of the two frames 15, the backrest 16 is vertically arranged at the top of the rear sides of the frames 15, a first rebound structure 3 is arranged at the bottom of the seat plate 13, a clamping structure 4 is arranged on the side surface of the inclined plate 20, the second rebound structure 5 further comprises an arc-shaped sleeve 51, a third spring 52, an arc-shaped slide rod 53, an arc-shaped plate 54, an arc-shaped sleeve 51 is fixed on the bottom surface of the seat plate 13, an arc-shaped slide rod 53 is fixed at the top end of the arc-shaped plate 54, the arc-shaped slide rod 53 is connected with the arc-shaped sleeve 51 in a sliding manner, a spring III 52 is sleeved on the side surface of the arc-shaped sleeve 51, a mounting seat II 55 is fixedly connected with the bottom surface of the seat plate 13, a positioning structure 6 is mounted on the side surface of the mounting seat II 55, a rebound structure II 5 mainly provides rebound force to enable the backrest 16 to be tightly attached to the back during adjustment, the positioning structure 6 comprises a spring IV 61, a rotating seat 62, a mounting seat III 63, a sliding column 64, a positioning column 65 and a positioning hole 66, a positioning hole 66 is arrayed on the side surface of the arc-shaped plate 54, the mounting seat III 63 is fixed on the side surface of the mounting seat III 63, the rotating seat 62 is movably connected inside the mounting seat III 63, the spring IV 61 is mounted between one side of the rotating seat 62 and the, the positioning column 65 is inserted in a through hole on the side surface of the mounting seat II 55, the positioning column 65 is matched with the positioning hole 66 for use, the adjusting handle 9 is fixed in the middle of the side surface of the rotating seat 62, the positioning column 65 is matched with the positioning hole 66, so that the mounting seat II 55 fixed on the bottom surface of the seat plate 13 is not relatively displaced with the arc-shaped plate 54, when the seat plate 13 rotates, the backrest 16 and the seat plate 13 synchronously rotate to keep an angle, when only the backrest is adjusted, the positioning column 65 slides out from the positioning hole 66 through the adjusting handle 9, so that the arc-shaped plate 54 and the mounting seat II 55 can relatively displace to realize the self inclination angle adjustment, and the use is more convenient, the armrest unit 7 also comprises an armrest plate 71, a sliding rod 72, a locking knob 73 and a side plate 74, two side plates 74 are correspondingly fixed on the top parts of the two side frames 15, two sliding holes are arranged on the top surface of the side plate 74, and two, the top ends of the two sliding rods 72 are fixed with handrail plates 71, the rear side of the side plate 74 is connected with a locking knob 73 in a threaded manner, the inner end of the locking knob 73 is in extrusion fit with the side surface of one of the sliding rods 72, the handrail unit 7 can change the height of the handrail plate 71 mainly through the locking knob 73, the handrail unit 7 further comprises a matching groove 75, the top surface of the side plate 74 is provided with the matching groove 75, the matching groove 75 is matched with the handrail plate 71 on the same side, the matching groove 75 can hide the handrail plate 71 inside and can be hidden into a chair without a handrail through hiding, the handrail unit further comprises a height adjusting unit 8 which comprises a hand wheel 81, a worm 82, a worm wheel 83, a lead screw 84 and a threaded sleeve 85, the top surface of the rotating disk 2 is fixed with the threaded sleeve 85, the bottom surface of the mounting plate two 12 is rotatably connected with the lead screw 84, the lead screw 84 is in threaded connection with the threaded sleeve 85, the top, the worm 82 is meshed with the worm wheel 83, one end of the worm 82 is fixedly connected with a hand wheel 81 through a shaft body, the height adjusting unit 8 mainly adjusts the height of the seat board 13, the chair further comprises a partition board 18, partition boards 18 are respectively fixed on two sides of the bottom surface of the seat board 13, the side surfaces of the partition boards 18 are tightly attached to the side surfaces of the side boards 74 at the same side, the partition boards 18 mainly prevent clothes and the like from being clamped in a gap between the side boards 74 and the seat board 13, the chair further comprises a universal wheel 10, supporting legs are arrayed on the side surface of the base 1, the lower end of each supporting leg is rotatably connected with the universal wheel 10, the universal wheel 10 mainly facilitates the movement of the chair capable of adjusting the front and back inclination angles of the seat board, the chair further comprises a headrest 14, two fixing rods are fixed on the top of the backrest 16, the headrest 14 is movably connected between the two fixing, the port of the air vent is fixed with an air vent net 17, and the air vent net 17 can ventilate the back of the human body, so that the comfort is improved;

the first rebound structure 3: the seat plate comprises a first mounting seat 31, a first supporting seat 32, a matching tooth 33, a first limiting plate 34, a first spring 35, a first telescopic rod 36 and a second limiting plate 37, wherein the supporting seat 32 is fixed at the bottom of the front side of the seat plate 13, the first limiting plate 34 is movably connected to the bottom of the supporting seat 32, the first telescopic rod 36 is fixed at the bottom of the first limiting plate 34, the second limiting plate 37 is fixed at the lower end of the first telescopic rod 36, the first mounting seat 31 is fixed on the side surface of the second mounting plate 12, the second limiting plate 37 is movably connected to the inside of the first mounting seat 31, the first spring 35 is sleeved on the side surface of the first telescopic rod 36, the supporting seat 32 is of an;

the clamping structure 4: the inclined plate comprises a second spring 41, a connecting rod 42, a sleeve frame 43, a clamping block 44, a chuck 45, a connecting shaft 46, a first mounting plate 47 and a straight gear 48, wherein the first mounting plate 47 is fixed on the side surface of the top of the second mounting plate 12, the top of the first mounting plate 47 is rotatably connected with the connecting shaft 46, one end of the connecting shaft 46 is fixedly connected with the straight gear 48, the straight gear 48 is meshed with a matching tooth 33, the chuck 45 is fixed at the other end of the connecting shaft 46, the sleeve frame 43 is fixed on the side surface of the inclined plate 20, the clamping block 44 is slidably connected inside the sleeve frame 43, the second spring 41 is arranged between the rear side of the clamping block 44 and the inner bottom of the sleeve frame 43, the clamping block 44 is clamped with the chuck 45;

the first springback structure 3 is mainly springback through a first spring 35, a first telescopic rod 36 extends, the first telescopic rod 36 pushes a first limiting plate 34 to rise, the first limiting plate 34 pushes a supporting seat 32 to rise, the supporting seat 32 pushes a seat plate 13 to rotate, and when a human body does not press during adjustment, the seat plate 13 is automatically springback in the mode, manual adjustment is not needed, and the operation is simpler and more convenient; the clamping structure 4 mainly clamps the chuck 45, so that the connecting shaft 46 is fixed and does not rotate, and finally the supporting seat 32 is locked to position the seat plate 13.

When in use: when the handrail is adjusted, the locking knob 73 is loosened, then the handrail plate 71 is pulled, the height of the handrail plate 71 is changed, when the handrail is adjusted to a proper height, the locking knob 73 is locked, the locking knob 73 is tightly attached to the sliding rod 72, and the height of the handrail is fixed; when the inclination angle of the seat plate 13 is adjusted, the fixture block 44 is loosened from the clamping groove of the chuck 45 through the adjusting rod, then the inclination angle of the seat plate 13 is adjusted through pressing the seat plate 13 downwards, when the seat plate is not pressed downwards, the first spring 35 can rebound and then pushes the supporting seat 32 to move upwards, the supporting seat 32 pushes the seat plate 13 to rotate around the fixing shaft at the rear side of the frame, the inclination angle is changed, the first spring 35 can assist in adjustment in the mode, the operation is more convenient and simpler, after the inclination angle of the seat plate 13 is adjusted, the adjusting rod is loosened, and then the fixture block 44 is clamped in the clamping groove of the chuck 45 through the resilience force of the second spring 41, so that; during height adjustment, the hand-operated wheel 81 is rotated, the hand-operated wheel 81 drives the worm 82 to rotate, the worm 82 drives the worm wheel 83 to rotate, the worm wheel 83 drives the lead screw 84 to rotate, and the lead screw 84 generates relative displacement in the threaded sleeve 85, so that the height is changed; when adjusting the inclination of back 16, make roating seat 62 rotatory through adjustment handle 9, and then spring four 61 is compressed, reference column 65 slides out from locating hole 66, the end of reference column 65 is in the hole of the side of mount pad two 55, later spring three 52 kick-backs and makes the distance between arc type sleeve 51 and the arc slide bar 53 change, and then make the position change of arc 54, and then arc 54 drives connection frame 56 rotatory, and then the inclination of back 16 changes, later spring four 61 kick-backs and makes roating seat 62 rotatory, roating seat 62 drives reference column 65 and injects in new locating hole 66, realize the angle modulation of back 16.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Inclination's chair around adjustable bedplate, its characterized in that: comprises a base (1), a first springback structure (3) and a clamping structure (4);

base (1): the top surface of the rotary plate is rotatably connected with a rotary plate (2), a second telescopic rod (11) is arrayed on the top surface of the rotary plate (2), a second mounting plate (12) is fixed at the top end of the second telescopic rod (11) of the array, a bottom plate (19) is fixed at the bottom of the second mounting plate (12), frames (15) are respectively fixed on two sides of the bottom plate (19), an inclined plate (20) is fixed between the front sides of the two frames (15), a fixed shaft is fixed at the top of the rear side of the two frames (15), the fixed shaft is rotatably connected with a seat plate (13) and a backrest (16), the seat plate (13) is arranged between the tops of the two frames (15), the backrest (16) is vertically arranged at the top of the rear side of the frame (15), a first rebound structure (3) is arranged at the bottom of the seat plate (13), and a clamping structure;

resilient structure one (3): the novel seat plate comprises a first mounting seat (31), a first supporting seat (32), matching teeth (33), a first limiting plate (34), a first spring (35), a first telescopic rod (36) and a second limiting plate (37), wherein the supporting seat (32) is fixed at the bottom of the front side of the seat plate (13), the bottom of the first supporting seat (32) is movably connected with the first limiting plate (34), the first telescopic rod (36) is fixed on the bottom surface of the first limiting plate (34), the second limiting plate (37) is fixed at the lower end of the first telescopic rod (36), the first mounting seat (31) is fixed on the side surface of the second mounting plate (12), the second limiting plate (37) is movably connected inside the first mounting seat (31), the first spring (35) is sleeved on the side surface of the first telescopic rod (36), the supporting seat (32) is of an arc-shaped structure, and the matching teeth (33) are;

clamping structure (4): it contains spring two (41), connecting rod (42), cover frame (43), fixture block (44), chuck (45), connecting axle (46), mounting panel one (47) and straight-teeth gear (48), the top side of mounting panel two (12) is fixed with mounting panel one (47), the top of mounting panel one (47) is rotated and is connected with connecting axle (46), the one end fixedly connected with straight-teeth gear (48) of connecting axle (46), straight-teeth gear (48) and cooperation tooth (33) meshing, the other end of connecting axle (46) is fixed with chuck (45), the side of swash plate (20) is fixed with cover frame (43), the inside sliding connection of cover frame (43) has fixture block (44), be equipped with spring two (41) between fixture block (44) rear side and the cover frame (43) bottom, fixture block (44) and chuck (45) joint, the side of fixture block (44) is fixed with connecting rod (42), an adjusting rod is fixed at the end of the connecting rod (42).

2. The chair capable of adjusting the front-rear tilting angle of the seat plate according to claim 1, wherein: still including resilience structure two (5), it contains arc sleeve (51), spring three (52), arc slide bar (53), arc (54), mount pad two (55) and connection frame (56), the bottom fixedly connected with connection frame (56) of back (16), the side fixedly connected with arc (54) of connection frame (56), the bottom surface of bedplate (13) is fixed with arc sleeve (51), the top end of arc (54) is fixed with arc slide bar (53), arc slide bar (53) and arc sleeve (51) sliding connection, the side cover of arc sleeve (51) has spring three (52), the bottom surface fixedly connected with mount pad two (55) of bedplate (13), location structure (6) are installed to the side of mount pad two (55).

3. The chair capable of adjusting the front-rear tilting angle of the seat plate according to claim 2, wherein: the positioning structure (6) comprises a spring IV (61), a rotating seat (62), a mounting seat III (63), a sliding column (64), a positioning column (65) and a positioning hole (66), positioning holes (66) are arrayed on the side surface of the arc-shaped plate (54), a third mounting seat (63) is fixed on the side surface of the second mounting seat (55), a rotating seat (62) is movably connected inside the third mounting seat (63), a spring IV (61) is arranged between one side of the rotating seat (62) and the second mounting seat (55), a sliding column (64) is connected inside the other side of the rotating seat (62) in a sliding way, a positioning column (65) is fixed in the middle of the sliding column (64), the positioning column (65) is inserted into the through hole on the side surface of the second mounting seat (55), and the positioning column (65) is matched with the positioning hole (66) for use, and the middle of the side surface of the rotating seat (62) is fixed with an adjusting handle (9).

4. The chair capable of adjusting the front-rear tilting angle of the seat plate according to claim 1, wherein: still include handrail unit (7), it contains handrail board (71), slide bar (72), locking knob (73) and sideboard (74), and the top correspondence of two frames (15) is fixed with two sideboard (74), sideboard (74) top surface is equipped with two slide openings, and corresponds two slide bars (72) of sliding connection in two slide openings, and the top of two slide bars (72) is fixed with handrail board (71), the rear side threaded connection of sideboard (74) has locking knob (73), the inner of locking knob (73) and the side extrusion fit of one of them slide bar (72).

5. The chair capable of adjusting the front-rear tilting angle of the seat plate according to claim 4, wherein: the handrail unit (7) further comprises a matching groove (75), the top surface of the side plate (74) is provided with the matching groove (75), and the matching groove (75) is matched with the handrail plate (71) on the same side.

6. The chair capable of adjusting the front-rear tilting angle of the seat plate according to claim 1, wherein: still include altitude mixture control unit (8), it contains hand round (81), worm (82), worm wheel (83), lead screw (84) and threaded sleeve (85), the top surface of rotary disk (2) is fixed with threaded sleeve (85), the bottom surface of mounting panel two (12) is rotated and is connected with lead screw (84), lead screw (84) and threaded sleeve (85) threaded connection, the top of lead screw (84) is fixed with worm wheel (83), the top surface of mounting panel two (12) is rotated through the fixed plate and is connected with worm (82), worm (82) and worm wheel (83) meshing, the hand round (81) of axis body fixedly connected with is passed through to the one end of worm (82).

7. The chair capable of adjusting the front-rear tilting angle of the seat plate according to claim 4, wherein: the novel seat is characterized by further comprising partition plates (18), the partition plates (18) are respectively fixed on two sides of the bottom surface of the seat plate (13), and the side surfaces of the partition plates (18) are tightly attached to the side surfaces of the side plates (74) on the same side.

8. The chair capable of adjusting the front-rear tilting angle of the seat plate according to claim 1, wherein: the device is characterized by further comprising universal wheels (10), supporting legs are arrayed on the side face of the base (1), and the lower end of each supporting leg is rotatably connected with the universal wheel (10).

9. The chair capable of adjusting the front-rear tilting angle of the seat plate according to claim 1, wherein: the backrest is characterized by further comprising a headrest (14), two fixing rods are fixed to the top of the backrest (16), and the headrest (14) is movably connected between the two fixing rods.

10. The chair capable of adjusting the front-rear tilting angle of the seat plate according to claim 1, wherein: the backrest is characterized by further comprising a ventilation net (17), ventilation holes are formed in the middle of the front side face of the backrest (16), and the ventilation net (17) is fixed to the end ports of the ventilation holes.