CN113040551B

CN113040551B - Multifunctional chair

Info

Publication number: CN113040551B
Application number: CN202110403103.2A
Authority: CN
Inventors: 陶丽佳; 潘澳; 张永鸿; 吴亚莲; 陈蒙蒙
Original assignee: Jiangsu University of Science and Technology
Current assignee: Jiangsu University of Science and Technology
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2023-01-20
Anticipated expiration: 2041-04-15
Also published as: CN113040551A

Abstract

The invention discloses a multifunctional chair, comprising: the automatic leg cleaning device comprises a bottom plate, a leg posture adjusting mechanism, a back wiping mechanism and a moving support mechanism, wherein a cushion is placed on the leg posture adjusting mechanism, and the moving support mechanism comprises an automatic brake module. The multifunctional chair has a leg position and posture adjusting function, and the electric push rod for controlling the leg position and posture adjusting mechanism stretches, so that the cushion rotates by a certain angle around the hinge, the leg position and posture of the old people are changed, the old people are assisted to stand up after using the toilet, the muscle damage of the old people is reduced, and the risk of the old people failing to stand up is prevented. After the old people sit on the chair, the supporting spring of the automatic braking module contracts under the action of gravity of people, so that the directional wheel is retracted into the square groove, and the square groove is in contact with the ground, thereby achieving the effect of quickly and stably braking. Compared with the foot-operated brake, the risk that the chair moves due to the fact that the brake is forgotten to be stepped on is avoided, and the operation is simpler.

Description

Multifunctional chair

Technical Field

The invention relates to the technical field of old-age-assisting machines, in particular to a multifunctional chair.

Background

According to statistics, the population of the elderly living alone in China is getting larger and larger, and because various functions of the body of the elderly are reduced, the elderly have a lot of potential safety hazards and inconvenience when the elderly are alone at home for activities. For example, when bathing, the floor of the bathroom is wet and slippery, which easily causes the old to fall down and the back of the old is cleaned with labored force; the old people have low bone density, poor cardiovascular regulation response, aging of organs such as muscles and the like, so cerebral ischemia is easy to occur when the old people stand up after sitting in a toilet for a long time, muscle injury and even fracture can be caused carelessly, and great difficulty and risk are brought to the independent life of the old people.

In order to solve the problems, various domestic and foreign bathing auxiliary equipment is continuously made available since the 21 st century, but the old-fashioned machines are not widely used in the market because of the high price.

The invention patent CN107638253A discloses a mechanical system of a multifunctional electric bath chair, which can change the back posture of a person by adjusting the angle between the back of the bath chair and a seat plate, so that the change of sitting posture and lying posture during bathing is realized, but the adjustment of the leg posture when the person changes from the sitting posture to the standing posture during toilet is not available, and the device adopts a foot-stepping mode for braking, so that the old can forget to step on the brake easily when the old uses the device alone, and certain potential safety hazards exist. The invention patent CN203107475U discloses a multifunctional nursing chair which can slide up and down along a bent support frame on the chair, the height of a chair seat is changed in the lifting process, and meanwhile, the angle of the chair seat is changed, so that the sitting posture is changed, the old can be conveniently cleaned in all directions when a nursing person places and takes out a toilet bowl and bathes the old when the old attends a toilet, but the posture of the old is adjusted to be backward inclined when the nursing chair ascends, the posture is different from the posture of an independent old who leans forward when a toilet is stood after the toilet is stood, and the back of the old is cleaned by the nursing person when the nursing chair bathes. In addition, above-mentioned two kinds of devices are all bulky, can not fold, and inconvenient accomodating and removal are carried.

Disclosure of Invention

In view of this, this design aim at to the old man of solitary sit the standing difficulty for a long time when being in like the lavatory, stand easily and fall down and the back cleans inconvenient circumstances of life such as comparatively labouring on slippery ground during the bathing, design a collapsible, supplementary multi-functional chair like lavatory and bathing suitable for the old man of solitary to reduce the safe risk when the old man lives alone, improve its quality of life.

The invention solves the technical problems by the following technical means:

a utility chair, comprising: the device comprises a bottom plate, a leg posture adjusting mechanism, a back wiping mechanism and a moving support mechanism;

the middle part of the bottom plate is provided with a first through hole;

the leg posture adjusting mechanism comprises a turnover plate and handrail units arranged on two sides of the turnover plate, and one side of the turnover plate is rotatably connected with the bottom plate; the handrail unit comprises a handrail rod and an electric push rod hinged with one end of the handrail rod, the bottom of the electric push rod is rotatably arranged on the bottom plate, and the other end of the handrail rod is fixedly connected with the turnover plate;

a second through hole corresponding to the first through hole is formed in the middle of the turnover plate, and a cushion is movably placed on the turnover plate;

the back wiping mechanism comprises a support frame in a shape of a Chinese character 'men' and a back wiping component which is arranged on the support frame and can reciprocate up and down, and the bottom of the support frame is rotatably arranged on the bottom plate;

the movable support mechanism comprises two front foot supports arranged oppositely and two rear foot supports arranged oppositely; the front foot support comprises a first support rod arranged vertically, an automatic brake module arranged at the bottom of the first support rod and a directional wheel arranged at the bottom of the automatic brake module; the rear foot supporting piece comprises a second supporting rod and a universal wheel, wherein the second supporting rod is vertically arranged, and the universal wheel is arranged at the bottom of the second supporting rod; the top of first bracing piece and the top of second bracing piece all with the bottom plate is connected.

Further, the automatic brake module comprises a square groove, a first mounting plate and a second mounting plate which are arranged oppositely up and down;

the top end of the square groove is sealed, and the outer wall of the top end of the square groove is in contact with the bottom of the first mounting plate; the second mounting plate is positioned in the bottom opening of the square groove;

the first mounting plate is connected with the second mounting plate through a guide rod, the bottom end of the guide rod is fixedly connected to the second mounting plate, the top end of the guide rod penetrates through the top end of the square groove and then slides out of the first mounting plate, and a limiting nut is screwed on the top end of the guide rod above the first mounting plate;

a supporting spring is arranged between the second mounting plate and the inner wall of the top end of the square groove;

the directional wheel is installed second mounting panel bottom, first bracing piece is connected on the first mounting panel.

Furthermore, the first supporting rod and the second supporting rod are detachably connected with the bottom plate;

the bottom plate is provided with a connecting sleeve corresponding to the first supporting rod and the second supporting rod one by one, and the first supporting rod and the second supporting rod are inserted into the corresponding connecting sleeve and locked with the connecting sleeve through a locking piece.

Furthermore, the locking piece comprises a pull rod and plug-in pieces connected to two ends of the pull rod, each plug-in piece comprises a fork-shaped pin and a hook-shaped pin which are coaxially connected, the top of the first support rod is locked with the connecting sleeve through the hook-shaped pin, and the top of the second support rod is locked with the connecting sleeve through the fork-shaped pin;

the forked pin is movably arranged in the spring sleeve in a penetrating mode, a movable groove used for the forked pin to slide in a reciprocating mode is formed in the spring sleeve, the movable groove is arranged close to one end of the hook-shaped pin in a sealing mode, a return spring is sleeved on the forked pin, and the return spring is located in the movable groove;

the spring sleeve is connected with the connecting sleeve for mounting the second supporting rod.

Furthermore, the supporting frame comprises two supporting pipes which are arranged oppositely and a fixing plate which is connected to the top ends of the two supporting pipes;

the bottom of the supporting tube is rotationally connected with the bottom plate;

the back rubbing assembly comprises a synchronous belt arranged longitudinally, a back rubbing plate arranged on the synchronous belt and a motor driving the synchronous belt to reciprocate up and down;

the synchronous belt is rotatably arranged in the mounting groove through a bearing;

the motor is fixedly arranged on the fixing plate through a U-shaped hoop;

the top end of the mounting groove is fixedly mounted in the middle of the bottom of the fixing plate, and the bottom of the mounting groove is rotatably connected with the bottom plate.

Furthermore, the supporting tube is of a telescopic structure and comprises a seat tube and a circular tube inserted in the seat tube, the circular tube and the seat tube are fixed through a seat tube clamp, the top end of the circular tube is connected with the fixing plate through a flange seat, the circular tube is installed in the flange seat, and the seat tube is rotatably connected with the bottom plate;

the bottom of the mounting groove is slidably mounted in a sliding groove, the sliding groove is U-shaped and axially and longitudinally extends, a strip-shaped longitudinally extending adjusting hole is formed in the side wall of the sliding groove, the mounting groove and the sliding groove are fixed through a tightness adjuster penetrating through the adjusting hole, and the tightness adjuster is screwed on the groove wall of the mounting groove; the bottom of the sliding groove is connected with the bottom plate through a U-shaped piece, and the bottom of the sliding groove is rotatably connected with the U-shaped piece.

Further, the seat tube is rotatably connected with the bottom plate through a rotating piece;

the rotating piece comprises a height increasing block and a folding hinge arranged on the height increasing block, and the bottom of the seat pipe is connected to the folding hinge.

Further, the bottom of one side of bottom plate is provided with and is used for hanging the couple of establishing the cushion.

Further, a control box is arranged on the bottom plate, a controller is installed in the control box, and the controller is electrically connected with the electric push rod and the back rubbing assembly.

The invention has the beneficial effects that:

1. the multifunctional chair has a function of adjusting the pose of the legs, the electric push rods are arranged on two sides of the cushion, the stretching of the electric push rods is controlled to enable the cushion to rotate by a certain angle around the hinge, the pose of the legs of the old is changed, the old is assisted to stand up after going to the toilet, the muscle damage of the old is reduced, and the risk of the old not standing up is prevented.

2. The automatic brake module can automatically brake after the old people sit on the chair. After the old people sit on the chair, the supporting spring of the automatic braking module is contracted under the action of the gravity of the old people, so that the directional wheel is retracted into the square groove, and the square groove is contacted with the ground, thereby achieving the effect of quickly and stably braking. Compared with a pedal type brake, the risk that the chair moves due to the fact that the brake is forgotten to be stepped on is avoided, and the operation is simpler.

3. When the back of the old man is wiped, the synchronous belt wheel is controlled to rotate by the positive and negative rotation of the motor, so that the back wiping plate arranged on the belt of the synchronous belt wheel reciprocates, and the function of cleaning the back of the old man is realized. In addition, the position of the reciprocating motion center of the back rubbing board can be changed by adjusting the position of the square groove on the back rubbing adjusting module in the sliding groove, so that the requirements of old people with different heights on the position of the back rubbing board can be met.

4. The multifunctional chair can be simply folded. The front foot supporting piece and the rear foot supporting piece can be taken down from the bottom plate, and the back wiping mechanism can be turned over above the cushion through the folding hinge, so that the occupied space is saved, and the carrying is convenient.

Drawings

FIG. 1 is a schematic view of a multi-purpose chair according to the present invention;

FIG. 2 is a schematic view of the structure of the bottom plate of the multipurpose chair of the present invention;

FIG. 3 is a schematic structural view of a movable support mechanism of the multifunctional chair of the present invention;

FIG. 4 is a schematic view of a front leg support of the multipurpose chair of the present invention;

FIG. 5 is a schematic structural view of an automatic brake module of the multifunctional chair of the present invention;

FIG. 6 is a schematic view of the structure of the back leg supporter of the multifunctional chair of the present invention;

FIG. 7 is a schematic view of the back wiping mechanism of the utility chair of the present invention;

FIG. 8 is a schematic structural view of a leg posture adjustment mechanism of the multifunctional chair of the present invention;

FIG. 9 is a schematic view of the connection structure of the movable supporting mechanism and the bottom plate of the multifunctional chair according to the present invention;

FIG. 10 is a first view illustrating the installation structure of the locking member of the utility chair according to the present invention;

FIG. 11 is a second schematic view of the installation structure of the locking member of the multipurpose chair of the present invention;

FIG. 12 is a schematic view of the insert of the utility chair of the present invention;

fig. 13 is a schematic structural view of a spring housing of a multipurpose chair according to the present invention.

Detailed Description

The invention will be described in detail below with reference to the following figures and specific examples:

as shown in fig. 1 to 13, a multipurpose chair of the present invention includes a base plate 100, a leg posture-adjusting mechanism 200, a back-wiping mechanism 300, and a movement-supporting mechanism 400.

Specifically, the middle part of the bottom plate 100 is provided with a first through hole 101, and the first through hole 101 is used for the old to use in the toilet.

The leg posture adjusting mechanism 200 includes a turning plate 201 and armrest units symmetrically disposed on both sides of the turning plate 201, and one side of the turning plate 201 is rotatably connected to the base plate 100 through a hinge. The handrail unit comprises a handrail rod 202 and an electric push rod 203 hinged with one end of the handrail rod 202, the bottom of the electric push rod 203 is rotatably installed on the bottom plate 100 through a base, and the other end of the handrail rod 202 is fixedly connected with the turnover plate 201 through an L-shaped connecting plate. The distance between the two electric push rods 203 is slightly larger than the shoulder width of a normal body. The leg posture adjusting mechanism 200 controls the two electric push rods 203 to simultaneously stretch and retract to drive the grab rail 202 to drive the turnover plate 201 to rotate for a certain angle, so that the posture of the legs of the old is changed, and the function of assisting the old to stand up after going to the toilet is realized.

Second through-hole 204 corresponding with first through-hole 101 has been seted up at the middle part of returning face plate 201, and cushion 500 has been placed in the activity on returning face plate 201, and cushion 500 is suitable for when being used for the old man shower, can take away cushion 500 when like the lavatory. The bottom of one side of the bottom plate 100 is provided with a hook 106 for hanging the cushion 500.

The back wiping mechanism 300 includes a support frame in a shape of a Chinese character 'men', and a back wiping assembly disposed on the support frame and capable of reciprocating up and down, wherein the bottom of the support frame is rotatably mounted on the bottom plate 100.

Specifically, the support frame comprises two support pipes arranged oppositely and a fixing plate 301 connected to the top ends of the two support pipes, and the bottom of each support pipe is rotatably connected with the bottom plate 100.

The back wiping assembly comprises a synchronous belt 302 arranged longitudinally, a back wiping plate 303 arranged on the synchronous belt 302 and a motor 304 for driving the synchronous belt 302 to reciprocate up and down. The timing belt 302 is rotatably mounted in the mounting groove 306 by a bearing 305. The motor 304 is fixedly mounted on the fixing plate 301 through a U-shaped anchor ear 307. The top end of the mounting groove 306 is fixedly mounted in the middle of the bottom of the fixing plate 301, and the bottom is rotatably connected with the bottom plate 100. The motor 304 drives the synchronous belt 302 to move, and the number of forward and reverse turns of the motor 304 is controlled to enable the back rubbing plate 303 to move up and down in a reciprocating manner, so that the back rubbing function is realized.

Furthermore, the supporting tube is of a telescopic structure and comprises a seat tube 308 and a circular tube 309 inserted in the seat tube 308, and the circular tube 309 and the seat tube 308 are fixed through a seat tube clamp 310. The length of the round tube 309 can be adjusted freely, and the round tube 309 and the seat tube 308 are fixed by the seat tube clamp 310 after adjustment. The top end of the circular tube 309 is connected with the fixing plate 301 through a flange seat 311, the circular tube 309 is installed in the flange seat 311, and the seat tube 308 is rotatably connected with the bottom plate 100.

The bottom of the mounting groove 306 is slidably mounted in the sliding groove 312, the sliding groove 312 is U-shaped, the axial direction extends longitudinally, the side wall of the sliding groove 312 is provided with an adjusting hole 313 which is long and extends longitudinally, the mounting groove 306 and the sliding groove 312 are fixed through a tightness adjuster 314 which is arranged in the adjusting hole 313 in a penetrating manner, and the tightness adjuster 314 is screwed on the groove wall of the mounting groove 306. The bottom of the chute 312 is connected to the base plate 100 via a U-shaped member 315, and the bottom of the chute 312 is rotatably connected to the U-shaped member 315.

After the tightness adjuster 314 is screwed, the height adjustment is carried out by matching with the supporting tube, the relative position of the mounting groove 306 in the sliding groove 312 can be adjusted, so that the height of the center of the synchronous belt 302 is adjusted, namely, the center height of the back rubbing component is adjusted, and the center of the back rubbing range can be adjusted for people with different heights.

Specifically, the seat tube 308 is rotatably connected to the base plate 100 via a rotating member. The rotating member comprises a height increasing block 316 and a folding hinge 317 arranged on the height increasing block 316, and the bottom of the seat tube 308 is connected with the folding hinge 317. The connecting shaft between the seat tube 308 and the folding hinge 317 and the connecting shaft between the sliding groove 312 and the U-shaped member 315 are coaxially arranged, so that the entire back wiping mechanism 300 can be folded, and the volume can be reduced.

The mobile support mechanism 400 includes two oppositely disposed forefoot supports 410 and two oppositely disposed hindfoot supports 420. Among them, the forefoot support 410 includes a first support rod 411 disposed vertically, an automatic brake module 412 installed at the bottom of the first support rod 411, and a directional wheel 413 installed at the bottom of the automatic brake module 412. The heel support member 420 includes a second support rod 421 vertically disposed and a universal wheel 422 disposed at the bottom of the second support rod 421. The top end of the first supporting rod 411 and the top end of the second supporting rod 421 are both detachably connected to the bottom plate 100.

Specifically, the automatic brake module 412 includes a square groove 4121 and a first mounting plate 4122 and a second mounting plate 4123 disposed opposite to each other in the up-down direction. The top end of the square groove 4121 is arranged in a sealing way, and the outer wall of the top end of the square groove 4121 is contacted with the bottom of the first mounting plate 4122; the second mounting plate 4123 is positioned in the bottom opening of the square groove 4121; the first mounting plate 4122 and the second mounting plate 4123 are connected through a guide bar 4124, the bottom end of the guide bar 4124 is fixedly connected to the second mounting plate 4123, the top end of the guide bar 4124 penetrates through the top end of the square groove 4121 and then slides out of the first mounting plate 4122, and a limit nut 4125 is screwed on the top end of the guide bar 4124 above the first mounting plate 4122. A supporting spring 4126 is arranged between the second mounting plate 4123 and the inner wall of the top end of the square groove 4121, the supporting spring 4126 enables the outer wall of the top end of the square groove 4121 to be always in contact with the lower surface of the first mounting plate 4122, and the bottom of the supporting spring 4126 is fixedly welded with the second mounting plate 4123. The direction wheel 413 is installed at the bottom of the second mounting plate 4123 and the first support bar 411 is coupled to the first mounting plate 4122.

The supporting spring 4126 can bear the self weight of the multifunctional chair, the bottom of the lower groove 4121 is not in contact with the bottom surface under the condition that the multifunctional chair does not sit on a person, when the person sits on the multifunctional chair, the supporting spring 4126 is pressed, the directional wheel 413 is accommodated in the square groove 4121, and the bottom of the square groove 4121 is in contact with the ground to achieve the purpose of braking the directional wheel 413.

The bottom of the bottom plate 100 is provided with connecting sleeves 102 corresponding to the first supporting rods 411 and the second supporting rods 421 one by one, and the first supporting rods 411 and the second supporting rods 421 are inserted into the corresponding connecting sleeves 102 and locked with the connecting sleeves 102 by the locking members 103.

Specifically, the locking member 103 includes a bar 1031 and an insert member connected to both ends of the bar 1031, the insert member includes a fork pin 1032 and a hook pin 1033 coaxially connected by a coupler, the top of the first support bar 411 is locked to the connection sleeve 102 by the hook pin 1033, and the top of the second support bar 421 is locked to the connection sleeve 102 by the fork pin 1032.

The forked pin 1032 is movably inserted into the spring housing 104, and the spring housing 104 is connected to the connection sleeve 102 on which the second support bar 421 is installed. A movable groove 105 for the reciprocating sliding of the fork-shaped pin 1032 is formed in the spring sleeve 104, one end of the movable groove 105, which is close to the hook-shaped pin 1033, is arranged in a sealing manner, a return spring 1034 is sleeved on the fork-shaped pin 1032, and the return spring 1034 is positioned in the movable groove 105.

The pull rod 1031 is pulled to separate the hook-shaped pin 1033 and the fork-shaped pin 1032 from the corresponding connecting sleeves 102, so that the first supporting rod 411 and the second supporting rod 421 can be quickly taken down from the corresponding connecting sleeves 102, and the user can conveniently carry out the dismounting operation. The rod portion of the forked pin 1032 is sleeved with a return spring 1034 and is installed in the spring sleeve 104, the spring sleeve 104 plays a guiding and limiting role on the rod portion of the forked pin 1032, when the pull rod 1031 is released, the hook-shaped pin 1033 and the forked pin 1032 can be reset under the action of the elastic force of the return spring 1034, and the purpose of fixing the first support rod 411 and the second support rod 421 with the corresponding connecting sleeves 102 is achieved.

Specifically, the bottom plate 100 is provided with a control box 107, a controller is installed in the control box 107, and the controller is electrically connected with the electric push rod 203 and the motor 304 of the back rubbing assembly. The control box 107 is fixed at the rear end of the bottom plate 100 at a position which does not affect the folding function, and a battery and a controller are arranged in the control box, and the controller is used for controlling the working states of the electric push rod 203 and the motor 304. In this embodiment, the controller may be a single chip microcomputer or a PLC.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.

Claims

1. A utility chair, comprising: a base plate (100), a leg posture adjusting mechanism (200), a back wiping mechanism (300) and a moving support mechanism (400);

the middle part of the bottom plate (100) is provided with a first through hole (101);

the leg posture adjusting mechanism (200) comprises a turnover plate (201) and handrail units positioned on two sides of the turnover plate (201), and one side of the turnover plate (201) is rotatably connected with the bottom plate (100); the handrail unit comprises a handrail rod (202) and an electric push rod (203) hinged with one end of the handrail rod (202), the bottom of the electric push rod (203) is rotatably installed on the bottom plate (100), and the other end of the handrail rod (202) is fixedly connected with the turnover plate (201);

a second through hole (204) corresponding to the first through hole (101) is formed in the middle of the turnover plate (201), and a cushion (500) is movably placed on the turnover plate (201);

the back wiping mechanism (300) comprises a support frame in a shape of a Chinese character 'men' and a back wiping component which is arranged on the support frame and can reciprocate up and down, and the bottom of the support frame is rotatably arranged on the bottom plate (100);

the mobile support mechanism (400) comprises two oppositely disposed forefoot supports (410) and two oppositely disposed rearfoot supports (420); the forefoot support (410) comprises a first support rod (411) arranged vertically, an automatic brake module (412) installed at the bottom of the first support rod (411), and a directional wheel (413) installed at the bottom of the automatic brake module (412); the rear foot supporting piece (420) comprises a second supporting rod (421) which is vertically arranged and a universal wheel (422) which is arranged at the bottom of the second supporting rod (421); the top end of the first supporting rod (411) and the top end of the second supporting rod (421) are both connected with the bottom plate (100);

the support frame comprises two support pipes which are arranged oppositely and a fixing plate (301) which is connected to the top ends of the two support pipes;

the bottom of the supporting tube is rotationally connected with the bottom plate (100);

the back wiping component comprises a synchronous belt (302) which is longitudinally arranged, a back wiping plate (303) which is arranged on the synchronous belt (302) and a motor (304) which drives the synchronous belt (302) to reciprocate up and down;

the synchronous belt (302) is rotatably arranged in the mounting groove (306) through a bearing (305);

the motor (304) is fixedly arranged on the fixing plate (301) through a U-shaped hoop (307);

the top end of the mounting groove (306) is fixedly mounted in the middle of the bottom of the fixing plate (301), and the bottom of the mounting groove is rotatably connected with the bottom plate (100);

the supporting tube is of a telescopic structure and comprises a seat tube (308) and a circular tube (309) inserted into the seat tube (308), the circular tube (309) and the seat tube (308) are fixed through a seat tube clamp (310), the top end of the circular tube (309) is connected with the fixing plate (301) through a flange seat (311), the circular tube (309) is installed in the flange seat (311), and the seat tube (308) is rotatably connected with the bottom plate (100);

the bottom of the mounting groove (306) is slidably mounted in a sliding groove (312), the sliding groove (312) is U-shaped and axially and longitudinally extends, an adjusting hole (313) which is long and longitudinally extends is formed in the side wall of the sliding groove (312), the mounting groove (306) and the sliding groove (312) are fixed through a tightness adjuster (314) which is arranged in the adjusting hole (313) in a penetrating manner, and the tightness adjuster (314) is screwed on the groove wall of the mounting groove (306); the bottom of the sliding chute (312) is connected with the bottom plate (100) through a U-shaped piece (315), and the bottom of the sliding chute (312) is rotatably connected with the U-shaped piece (315).

2. A multi-function chair as claimed in claim 1, wherein: the automatic brake module (412) comprises a square groove (4121), a first mounting plate (4122) and a second mounting plate (4123), wherein the first mounting plate and the second mounting plate are arranged oppositely up and down;

the top end of the square groove (4121) is hermetically arranged, and the outer wall of the top end of the square groove (4121) is contacted with the bottom of the first mounting plate (4122); the second mounting plate (4123) is positioned in the bottom opening of the square groove (4121);

the first mounting plate (4122) is connected with the second mounting plate (4123) through a guide rod (4124), the bottom end of the guide rod (4124) is fixedly connected to the second mounting plate (4123), the top end of the guide rod (4124) penetrates through the top end of the square groove (4121) and then slides out of the first mounting plate (4122), and a limiting nut (4125) is screwed at the top end of the guide rod (4124) above the first mounting plate (4122);

a supporting spring (4126) is arranged between the second mounting plate (4123) and the inner wall of the top end of the square groove (4121);

the directional wheel (413) is installed at the bottom of the second installation plate (4123), and the first support rod (411) is connected to the first installation plate (4122).

3. The utility chair of claim 1, wherein: the first supporting rod (411) and the second supporting rod (421) are detachably connected with the bottom plate (100);

the bottom plate (100) bottom be provided with first bracing piece (411) and second bracing piece (421) one-to-one's adapter sleeve (102), first bracing piece (411) and second bracing piece (421) all insert and establish and correspond in adapter sleeve (102) to through locking piece (103) with adapter sleeve (102) locking.

4. A multi-function chair as claimed in claim 3, wherein: the locking member (103) comprises a tie bar (1031) and an insert connected to both ends of the tie bar (1031), the insert comprises a fork pin (1032) and a hook pin (1033) which are coaxially connected, the top of the first support bar (411) is locked with the connection sleeve (102) by the hook pin (1033), and the top of the second support bar (421) is locked with the connection sleeve (102) by the fork pin (1032);

the fork-shaped pin (1032) is movably arranged in the spring sleeve (104) in a penetrating mode, a movable groove (105) used for the fork-shaped pin (1032) to slide in a reciprocating mode is formed in the spring sleeve (104), one end, close to the hook-shaped pin (1033), of the movable groove (105) is arranged in a sealing mode, a return spring (1034) is sleeved on the fork-shaped pin (1032), and the return spring (1034) is located in the movable groove (105);

the spring sleeve (104) is connected with the connecting sleeve (102) provided with the second supporting rod (421).

5. A multi-function chair as claimed in claim 1, wherein: the seat tube (308) is rotationally connected with the bottom plate (100) through a rotating piece;

the rotating piece comprises a heightening block (316) and a folding hinge (317) arranged on the heightening block (316), and the bottom of the seat tube (308) is connected to the folding hinge (317).

6. A multi-function chair as claimed in claim 1, wherein: the bottom of one side of the bottom plate (100) is provided with a hook (106) used for hanging the cushion (500).

7. A multi-function chair as claimed in claim 1, wherein: the back-rubbing machine is characterized in that a control box (107) is arranged on the bottom plate (100), a controller is installed in the control box (107), and the controller is electrically connected with the electric push rod (203) and the back-rubbing component.