CN112914851A

CN112914851A - Safety nursing chair suitable for old people and non-amputated patients

Info

Publication number: CN112914851A
Application number: CN202110098613.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Guo Depeng
Current assignee: Guo Depeng
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-06-08

Abstract

The invention discloses a safety nursing chair suitable for old people and patients without amputation, which comprises a supporting bottom beam, wherein auxiliary supporting structures are arranged on two sides of the bottom of the supporting bottom beam, tensioning structures are arranged on two sides of one end of the top of the supporting bottom beam, a seat plate is arranged at the top end of the supporting bottom beam, a leg supporting plate is arranged at the bottom of the seat plate, a backrest is arranged at one end of the seat plate, supporting shells are respectively arranged at two ends of the top of the backrest, a sun shield is arranged between the supporting shells, a second guide wheel, a first guide wheel, a fourth limiting wheel, a third limiting wheel, a second limiting wheel, a first limiting wheel and the tensioning structures are connected through a traction rope, and a massage headrest is arranged at one end of the top of the backrest. Has the advantages that: can be adapted to old person and non-amputation patient, can realize the exercise to upper limbs and low limbs when using, the wheelchair is adjustable, can make patient lie with the angle of difference, can massage patient's head and neck, avoids sitting for a long time and causes the health tired out, rational in infrastructure, convenient to use.

Description

Safety nursing chair suitable for old people and non-amputated patients

Technical Field

The invention relates to the technical field of nursing chairs, in particular to a safety nursing chair suitable for old people and non-amputated patients.

Background

Care is the diagnosis and treatment of human responses to existing and potential health problems, and in general, modern nursing is a comprehensive applied discipline combining natural and social sciences that serves human health, and is a combination of science, art, and humanity. The rehabilitation nursing is an important component of nursing, and the rehabilitation nursing refers to comprehensively and coordinately applying measures such as medicine, education and the like to train and retrain the disabled, reduces inconvenience caused by disability factors, improves the activity of the disabled as much as possible, recovers residual functions of the disabled, and achieves the effects of self-care of basic life energy, re-participation in social activities and the like. The old person is a special colony of a class, the general disease entangles, some old person's muscle can become debilitated, musculature can be paralyzed, the upper limbs of this kind of old person that gradually will not use the strength, can't the thing of taking, to these old people, can generally do rehabilitation and nursing in the rehabilitation and nursing institute, do some rehabilitation and train and take exercise the upper limbs under nurse's help, current wheelchair generally can not improve the effective exercise of upper and lower limbs for old patient, the function is comparatively single, excellent in use effect.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

In view of the problems in the related art, the present invention provides a safety nursing chair suitable for the elderly and non-amputated patients, so as to overcome the above technical problems in the prior art.

Therefore, the invention adopts the following specific technical scheme:

a safety nursing chair suitable for old people and patients without amputation comprises a supporting bottom beam, wherein two sides of the supporting bottom beam are respectively provided with a hand push wheel, a battery is arranged in the middle of the top end of the supporting bottom beam, two sides of one end of the bottom of the supporting bottom beam are respectively provided with a universal wheel, two sides of the bottom of the supporting bottom beam, which are far away from one end of the universal wheel, are respectively provided with an auxiliary supporting structure, two sides of the top of the supporting bottom beam, which are close to one end of the universal wheel, are respectively provided with a tensioning structure, the top end of the supporting bottom beam is provided with a seat plate, one end of the bottom of the seat plate, which is close to the universal wheel, is provided with a leg supporting plate, one side of the top end of the leg supporting plate, which is far away from the seat plate, is provided with a foot limiting plate, two sides of the seat, the top end of one side of the transfusion adjusting rod is provided with a hook, the top end of one side of the supporting sleeve is provided with a first limiting wheel, two sides of the bottom of the seat plate, which are close to one end of the leg supporting plate, are respectively provided with a second limiting wheel, two sides of the bottom of the seat plate, which are far away from one end of the second limiting wheel, are respectively provided with a third limiting wheel, one end of the seat plate, which is far away from the leg supporting plate, is provided with a backrest, the backrest and the supporting bottom beam are matched and connected through a hydraulic telescopic rod, the top end of the backrest is provided with a handle, two sides of the bottom of the backrest, which are close to one end of the handle, are respectively provided with a fourth limiting wheel, two ends of the top of the backrest are respectively provided with a supporting shell, one end inside the supporting shell is provided with a first guide wheel, and, a sun shield is arranged between the support shells, the second guide wheel, the first guide wheel, the fourth limiting wheel, the third limiting wheel, the second limiting wheel, the first limiting wheel and the tensioning structure are connected in a matching manner through a traction rope, one end of the traction rope is fixedly connected with one end of the leg support plate, the other end of the traction rope is provided with a handle positioned at one end of the support shell, and a massage headrest is arranged in the middle of one end of the top of the backrest;

wherein, the massage headrest comprises a pillow pad, a flexible surface layer, a driving motor and a rotating roller, the flexible surface layer is positioned at the top end of the pillow pad and is in a fixed connection structure with the pillow pad, the pillow pad is in a hollow structure, the driving motor is positioned at one end inside the pillow pad, the rotating roller is positioned at the other end inside the pillow pad, a rotating shaft is arranged inside the rotating roller, the rotating shaft and the rotating roller are in a fixed connection structure, one end of the rotating shaft is connected with an output shaft of the driving motor, the other end of the rotating shaft is matched and connected with one side inside the pillow pad through a bearing, the rotating roller is in an I-shaped structure, a plurality of massage components are arranged at the side edge of the rotating roller, each massage component comprises a supporting sleeve, a telescopic sleeve, a buffer spring and a plurality of movable supporting rollers, and the bottom end of the supporting sleeve is fixedly connected with the rotating roller, one end of the telescopic sleeve is inserted into the supporting sleeve, the buffer spring is positioned between the supporting sleeve and the telescopic sleeve, and the movable supporting rollers are positioned on two sides of the top end of the telescopic sleeve and are movably connected with the telescopic sleeve.

Furthermore, the auxiliary supporting structure is composed of a threaded sleeve, a screw rod, a pressing plate and a lifting handle, the threaded sleeve is fixedly connected with the supporting bottom beam, the screw rod is inserted into the threaded sleeve, the pressing plate is located at the bottom end of the screw rod, and the lifting handle is located at the top end of the screw rod.

Further, tensioning texture comprises servo motor, T type rotation support axle, first tensioning roller and second tensioning roller, T type rotation support axle's one end with servo motor's output shaft, first tensioning roller with second tensioning roller connect respectively in the both sides of T type rotation support axle other end.

Furthermore, the top ends of the seat plate and the backrest are respectively provided with a soft cushion.

Furthermore, the infusion adjusting rod is of a telescopic structure, two sides of the top end of the seat plate are respectively provided with a handrail, and the handrails are of a U-shaped structure.

Furthermore, the hydraulic telescopic rod is connected with the supporting bottom beam and the backrest, the backrest and the seat plate, and the leg supporting plate and the seat plate in a matched manner through movable supporting shafts respectively.

Furthermore, the massage headrest with be the swing joint structure between the back, a plurality of bar grooves have been seted up on the back, the both sides of massage headrest bottom all be provided with respectively with the slider that the bar groove cooperateed and is connected, the both sides of back all be provided with respectively a plurality of interlude in the back and with the locking screw that the massage headrest cooperateed and is connected.

Further, the flexible surface layer is made of bamboo charcoal fiber, and the pillow is made of wood.

Furthermore, one end of the sun shield is provided with a sun-shading glass plate which is inserted into the sun shield, and one end of the sun-shading glass plate is provided with a limiting strip.

Further, the leg support plate is rotated at an angle of 0-45 °.

The invention has the beneficial effects that: through this security nursing chair suitable for old person and non-amputation patient to can be adapted to old person and non-amputation patient, can realize the exercise to upper limbs and low limbs when using, the wheelchair is adjustable, can make patient lie with different angles, can massage patient's head and neck, avoids sitting for a long time and causes the health tired out, rational in infrastructure, convenient to use.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is one of the schematic structural views of a safety care chair suitable for use with elderly and non-amputated patients in accordance with an embodiment of the present invention;

FIG. 2 is a second schematic structural view of a safety nursing chair suitable for elderly people and non-amputated patients according to the embodiment of the present invention;

FIG. 3 is a schematic view of the connection of the support shell and the sun visor of a safety care chair suitable for use with elderly and non-amputated patients in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a headrest structure of a safety care chair for elderly and non-amputated patients according to an embodiment of the present invention;

FIG. 5 is a schematic view of the internal structure of a pillow of a safety nursing chair suitable for elderly people and non-amputated patients according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a massage assembly of a safety care chair suitable for use with elderly and non-amputated patients, according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of the tensioning arrangement of a safety care chair suitable for use with elderly and non-amputated patients in accordance with an embodiment of the present invention;

fig. 8 is a schematic structural view of a backrest of a safety nursing chair suitable for old people and patients without amputation according to the embodiment of the invention.

In the figure:

1. supporting the bottom beam; 2. a hand-push wheel; 3. a battery; 4. a universal wheel; 5. an auxiliary support structure; 6. a tensioning structure; 7. a seat plate; 8. a leg support plate; 9. a foot limiting plate; 10. a support sleeve; 11. a transfusion adjusting rod; 12. hooking; 13. a first limit wheel; 14. a second limiting wheel; 15. a third limiting wheel; 16. a backrest; 17. a hydraulic telescopic rod; 18. a handle; 19. a fourth limiting wheel; 20. a support housing; 21. a first guide wheel; 22. a second guide wheel; 23. a sun visor; 24. a hauling rope; 25. a handle; 26. a massage headrest; 27. a pillow pad; 28. a flexible facing; 29. a drive motor; 30. rotating the roller; 31. a rotating shaft; 32. a massage assembly; 33. a support sleeve; 34. a telescopic sleeve; 35. a buffer spring; 36. a movable supporting roller; 37. a threaded sleeve; 38. a screw; 39. pressing a plate; 40. a handle; 41. a servo motor; 42. a T-shaped rotating support shaft; 43. a first tension roller; 44. a second tension roller; 45. a soft cushion; 46. a grab bar; 47. a movable support shaft; 48. a strip-shaped groove; 49. a slider; 50. locking the screw rod; 51. a sun-shading glass plate; 52. and (5) a limiting strip.

Detailed Description

For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.

According to an embodiment of the present invention, a safety care chair suitable for elderly and non-amputated patients is provided.

The first embodiment is as follows:

as shown in fig. 1 to 8, the safety nursing chair suitable for the elderly and non-amputated patients according to the embodiment of the invention comprises a supporting base beam 1, wherein both sides of the supporting base beam 1 are respectively provided with a hand push wheel 2, a battery 3 is arranged in the middle of the top end of the supporting base beam 1, both sides of one end of the bottom of the supporting base beam 1 are respectively provided with a universal wheel 4, both sides of one end of the bottom of the supporting base beam 1, which is far away from the universal wheels 4, are respectively provided with an auxiliary supporting structure 5, both sides of one end of the top of the supporting base beam 1, which is near to the universal wheels 4, are respectively provided with a tensioning structure 6, the top end of the supporting base beam 1 is provided with a seat plate 7, one end of the bottom of the seat plate 7, which is near to the universal wheels 4, one side of the top end of the leg supporting plate 8, the two sides of the seat plate 7 close to one end of the leg supporting plate 8 are respectively provided with a supporting sleeve 10, an infusion adjusting rod 11 is arranged inside the supporting sleeve 10, the top end of one side of the infusion adjusting rod 11 is provided with a hook 12, the top end of one side of the supporting sleeve 10 is provided with a first limiting wheel 13, the two sides of the bottom of the seat plate 7 close to one end of the leg supporting plate 8 are respectively provided with a second limiting wheel 14, the two sides of the bottom of the seat plate 7 far away from one end of the second limiting wheel 14 are respectively provided with a third limiting wheel 15, the end of the seat plate 7 far away from the leg supporting plate 8 is provided with a backrest 16, the backrest 16 is matched and connected with the supporting bottom beam 1 through a hydraulic telescopic rod 17, the top end of the backrest 16 is provided with a handle 18, the two sides of the bottom of the backrest 16 close to one end of the handle 18 are respectively, the two ends of the top of the backrest 16 are respectively provided with a support shell 20, one end inside the support shell 20 is provided with a first guide wheel 21, one end inside the support shell 20, which is far away from the first guide wheel 21, is provided with a second guide wheel 22, a sun shield 23 is arranged between the support shells 20, the second guide wheel 22, the first guide wheel 21, the fourth limiting wheel 19, the third limiting wheel 15, the second limiting wheel 14, the first limiting wheel 13 and the tensioning structure 6 are connected in a matching manner through a traction rope 24, one end of the traction rope 24 is fixedly connected with one end of the leg support plate 8, the other end of the traction rope 24 is provided with a handle 25 positioned at one end of the support shell 20, and a massage headrest 26 is arranged in the middle position of one end of the top of the backrest 16;

wherein, massage headrest 26 comprises pillow 27, flexible surface course 28, driving motor 29 and commentaries on classics roller 30, flexible surface course 28 is located pillow 27's top and with pillow 27 is the fixed connection structure, pillow 27 is the hollow structure, driving motor 29 is located pillow 27 inside one end, commentaries on classics roller 30 is located pillow 27 inside other end, the inside of commentaries on classics roller 30 is provided with pivot 31, pivot 31 with commentaries on classics roller 30 is the fixed connection structure, the one end of pivot 31 with driving motor 29's output shaft, the other end of pivot 31 with pillow 27 inside one side is through bearing cooperation connection, commentaries on classics roller 30 is the I-shaped structure, the side of commentaries on classics roller 30 is provided with a plurality of massage subassembly 32, massage subassembly 32 comprises support sleeve 33, telescopic sleeve 34, buffer spring 35 and a plurality of movable backing roll 36, the bottom of support sleeve 33 with change roller 30 fixed connection, the one end interlude of telescope tube 34 in the inside of support sleeve 33, buffer spring 35 is located support sleeve 33 with between the telescope tube 34, movable support roller 36 is located the both sides on telescope tube 34 top and with telescope tube 34 is the swing joint structure.

In one embodiment, the auxiliary supporting structure 5 is composed of a threaded sleeve 37, a threaded rod 38, a pressing plate 39 and a handle 40, the threaded sleeve 37 is fixedly connected with the supporting bottom beam 1, the threaded rod 38 is inserted into the threaded sleeve 37, the pressing plate 39 is located at the bottom end of the threaded rod 38, and the handle 40 is located at the top end of the threaded rod 38.

In one embodiment, the tensioning structure 6 is composed of a servo motor 41, a T-shaped rotation supporting shaft 42, a first tensioning roller 43 and a second tensioning roller 44, one end of the T-shaped rotation supporting shaft 42 is connected with an output shaft of the servo motor 41, and the first tensioning roller 43 and the second tensioning roller 44 are respectively connected to both sides of the other end of the T-shaped rotation supporting shaft 42.

In one embodiment, the top ends of the seat plate 7 and the backrest 16 are provided with cushions 45, respectively.

In one embodiment, the infusion adjusting rod 11 is of a telescopic structure, two sides of the top end of the seat plate 7 are respectively provided with a handrail 46, and the handrail 46 is of a U-shaped structure.

In one embodiment, the hydraulic telescopic rod 17 is connected with the supporting bottom beam 1 and the backrest 16, the backrest 16 and the seat plate 7, and the leg supporting plate 8 and the seat plate 7 through a movable supporting shaft 47.

In one embodiment, the massage headrest 26 and the backrest 16 are movably connected, the backrest 16 is provided with a plurality of grooves 48, two sides of the bottom end of the massage headrest 26 are respectively provided with a slider 49 in cooperation with the grooves 48, and two sides of the backrest 16 are respectively provided with a plurality of locking screws 50 inserted into the backrest 16 and in cooperation with the massage headrest 26.

In one embodiment, the flexible face layer 28 is made of bamboo charcoal fiber, and the pillow 27 is made of wood.

In one embodiment, a sunshade glass plate 51 inserted into the sunshade plate 23 is disposed at one end of the sunshade plate 23, and a position-limiting strip 52 is disposed at one end of the sunshade glass plate 51.

In one embodiment, the leg support plate 8 is rotated by 0+45 °.

The working principle is as follows: the patient sits on the nursing chair, the angle of the backrest 16 is adjusted through the hydraulic telescopic rod 17, so that the patient lies at a more comfortable angle, the head and the neck of the patient can be massaged through the massage headrest 26, during massage, the rotary roller 30 is driven to rotate through the driving motor 29, so that the head and the neck of the patient are massaged through the massage assembly 32 consisting of the supporting sleeve 33, the telescopic sleeve 34, the buffer spring 35 and the movable supporting roller 36, when the patient needs to exercise, the legs and the feet of the patient are placed on the leg supporting plate 8 and the foot limiting plate 9, then the handle 25 is pulled by both hands of the patient, the traction rope 24 is guided through the second guide wheel 22, the first guide wheel 21, the fourth limiting wheel 19, the third limiting wheel 15, the second limiting wheel 14, the first limiting wheel 13 and the tensioning structure 6, so that when the handle 25 is pulled by hand, the lifting of the leg supporting plate 8 and the foot limiting plate 9 can be driven, thereby can realize taking exercise to patient's upper limbs and low limbs, improve nursing effect, in addition according to the height of the patient adjustment massage headrest 26 of different heights, through the elasticity degree that the tensioning texture 6 that constitutes by servo motor 41, T type rotation support axle 42, first tensioning roller 43 and second tensioning roller 44 adjusted haulage rope 24 to be adapted to the patient of different heights.

In conclusion, by means of the technical scheme, the safety nursing chair suitable for the old and the non-amputation patients can be suitable for the old and the non-amputation patients, the upper limbs and the lower limbs can be exercised when the safety nursing chair is used, the wheelchair can be adjusted, the patients can lie at different angles, the heads and the necks of the patients can be massaged, the body fatigue caused by long-time sitting is avoided, the structure is reasonable, and the safety nursing chair is convenient to use.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The safety nursing chair is characterized by comprising a supporting bottom beam (1), wherein two sides of the supporting bottom beam (1) are respectively provided with a hand push wheel (2).

2. The safety nursing chair suitable for the elderly and patients without amputation according to claim 1, wherein a battery (3) is disposed at the middle position of the top end of the supporting bottom beam (1), universal wheels (4) are disposed on both sides of one end of the bottom of the supporting bottom beam (1), auxiliary supporting structures (5) are disposed on both sides of one end of the bottom of the supporting bottom beam (1) away from the universal wheels (4), tensioning structures (6) are disposed on both sides of one end of the top of the supporting bottom beam (1) close to the universal wheels (4), a seat plate (7) is disposed on the top end of the supporting bottom beam (1), a leg supporting plate (8) is disposed on one end of the bottom of the seat plate (7) close to the universal wheels (4), and a foot limiting plate (9) is disposed on one side of the top end of the leg supporting plate (8) away from the seat plate (7), both sides of one end, close to the leg supporting plate (8), of the seat plate (7) are respectively provided with a supporting sleeve (10), an infusion adjusting rod (11) is arranged inside the supporting sleeve (10), the top end of one side of the infusion adjusting rod (11) is provided with a hook (12), the top end of one side of the supporting sleeve (10) is provided with a first limiting wheel (13), both sides of one end, close to the leg supporting plate (8), of the bottom of the seat plate (7) are respectively provided with a second limiting wheel (14), both sides of one end, far away from the second limiting wheel (14), of the bottom of the seat plate (7) are respectively provided with a third limiting wheel (15), one end, far away from the leg supporting plate (8), of the seat plate (7) is provided with a backrest (16), and the supporting bottom beam (1) are matched and connected through a hydraulic telescopic rod (17), the top end of the backrest (16) is provided with a handle (18), both sides of the bottom of the backrest (16) close to one end of the handle (18) are respectively provided with a fourth limiting wheel (19), both ends of the top of the backrest (16) are respectively provided with a support shell (20), one end inside the support shell (20) is provided with a first guide wheel (21), one end inside the support shell (20) far away from the first guide wheel (21) is provided with a second guide wheel (22), a sun shield (23) is arranged between the support shells (20), the second guide wheel (22), the first guide wheel (21), the fourth limiting wheel (19), the third limiting wheel (15), the second limiting wheel (14), the first limiting wheel (13) and the tensioning structure (6) are connected in a matching way through a traction rope (24), one end of the traction rope (24) is fixedly connected with one end of the leg supporting plate (8), the other end of the traction rope (24) is provided with a handle (25) positioned at one end of the supporting shell (20), and the middle position of one end of the top of the backrest (16) is provided with a massage headrest (26);

wherein, massage headrest (26) comprises pillow (27), flexible surface layer (28), driving motor (29) and commentaries on classics roller (30), flexible surface layer (28) are located the top of pillow (27) and with pillow (27) are fixed connection structure, pillow (27) are hollow structure, driving motor (29) are located the inside one end of pillow (27), change roller (30) and be located the inside other end of pillow (27), the inside of commentaries on classics roller (30) is provided with pivot (31), pivot (31) with change roller (30) are fixed connection structure, the one end of pivot (31) with the output shaft of driving motor (29), the other end of pivot (31) with one side of pillow (27) inside is connected through bearing cooperation, change roller (30) are the I shape structure, the side of changeing roller (30) is provided with a plurality of massage subassembly (32), massage subassembly (32) comprise support sleeve (33), telescopic sleeve (34), buffer spring (35) and a plurality of activity backing roll (36), the bottom of support sleeve (33) with change roller (30) fixed connection, the one end interlude of telescopic sleeve (34) in the inside of support sleeve (33), buffer spring (35) are located support sleeve (33) with between telescopic sleeve (34), activity backing roll (36) are located the both sides on telescopic sleeve (34) top and with telescopic sleeve (34) are the swing joint structure, supplementary bearing structure (5) comprise swivel nut (37), screw rod (38), clamp plate (39) and handle (40), swivel nut (37) with support floorbar (1) fixed connection, the screw rod (38) is inserted into the screw sleeve (37), the pressing plate (39) is located at the bottom end of the screw rod (38), and the lifting handle (40) is located at the top end of the screw rod (38).

3. A safety nursing chair adapted to elderly and non-amputated patients according to claim 2, characterized in that the tensioning structure (6) is composed of a servo motor (41), a T-shaped rotation support shaft (42), a first tensioning roller (43) and a second tensioning roller (44), one end of the T-shaped rotation support shaft (42) is connected with the output shaft of the servo motor (41), the first tensioning roller (43) and the second tensioning roller (44) are respectively connected to both sides of the other end of the T-shaped rotation support shaft (42).

4. A safety-care chair adapted for elderly and non-amputated patients according to claim 2, characterized in that the top ends of the seat plate (7) and the backrest (16) are provided with a soft cushion (45), respectively.

5. The safety nursing chair for the elderly and non-amputated patients according to claim 2, characterized in that the infusion adjusting rod (11) is of a telescopic structure, two handrails (46) are respectively arranged on two sides of the top end of the seat plate (7), and the handrails (46) are of a U-shaped structure.

6. The safety nursing chair for elderly and non-amputated patients according to claim 2, characterized in that the hydraulic telescopic rod (17) is cooperatively connected with the supporting bottom beam (1) and the backrest (16), the backrest (16) and the seat plate (7), and the leg supporting plate (8) and the seat plate (7) through a movable supporting shaft (47).