CN107693302B - Rehabilitation chair for hand and foot synchronous exercise - Google Patents

Abstract

The invention discloses a rehabilitation chair for hand and foot synchronous exercise. The existing auxiliary equipment can not be switched back and forth between sitting exercise and standing exercise, and hands and feet can not be synchronously exercised. The invention comprises a chair body, a cushion plate, a backrest plate, a standing auxiliary mechanism, a driving mechanism, an arm stretching mechanism and a leg lifting mechanism. The standing auxiliary mechanism comprises an electric push rod, a sliding plate, a fixed plate, a first connecting plate, a second connecting plate, a first hinge plate group and a second hinge plate group. The driving mechanism comprises a motor, an adjustable crankshaft, a first connecting rod, a second connecting rod, a third connecting rod, a first sliding block, a second sliding block and a third sliding block. The arm stretching mechanism comprises a rope, a first pulley, a second pulley, a support column and a handle. The leg lifting mechanism comprises a rack, a cylindrical gear, a driving shaft, a driving bevel gear and two lifting assemblies. The invention can exercise hands and feet of patients simultaneously, and has higher exercise efficiency.

Description

A rehabilitation chair for synchronous exercise of hands and feet

Technical field

The invention belongs to the technical field of rehabilitation machinery, and specifically relates to a rehabilitation chair for synchronous exercise of hands and feet.

Background technique

For patients suffering from brain and spinal cord injuries, stroke, muscle atrophy, physiological function degeneration or paralysis, in addition to relying on medical assistive devices to move and position the body in daily life, rehabilitation treatment work must also use related assistive devices. can only be carried out with assistance. Most of the existing auxiliary equipment can only perform rehabilitation treatment on the patient's hands or feet alone, and the rehabilitation efficiency is low. Moreover, existing auxiliary equipment can only meet the patient's needs for sitting or standing exercises, and cannot switch back and forth between sitting and standing exercises, cannot simultaneously exercise hands and feet, and cannot assist patients to complete their needs from sitting to standing. Therefore, it is very important to design a rehabilitation chair that can exercise the hands and feet at the same time and can switch back and forth between sitting exercises and standing exercises.

Contents of the invention

The object of the present invention is to provide a rehabilitation chair for synchronous exercise of hands and feet.

The invention includes a chair body, a seat cushion board, a backrest board, a standing auxiliary mechanism, a driving mechanism, an arm stretching mechanism and a leg raising mechanism. One end of the seat cushion board is hinged to the chair body, and the other end is hinged to the bottom end of the backrest board.

The standing auxiliary mechanism includes an electric push rod, a sliding plate, a fixed plate, a first connecting plate, a second connecting plate, a first hinge plate group and a second hinge plate group. The first hinge plate group includes a first hinge plate, a second hinge plate, a third hinge plate and a fourth hinge plate that are hinged end to end to form a parallelogram. The second hinge plate group includes a fifth hinge plate, a sixth hinge plate, a seventh hinge plate and an eighth hinge plate that are hinged end to end to form a parallelogram. The hinge shaft of the first hinge plate and the second hinge plate is fixed at one end of the first connecting plate. The hinge shaft of the fifth hinge plate and the sixth hinge plate is fixed at the other end of the first connecting plate. The hinge shaft of the third hinge plate and the fourth hinge plate is fixed at one end of the second connecting plate. The hinge shaft of the seventh hinge plate and the eighth hinge plate is fixed at the other end of the second connecting plate. The hinge shafts of the second hinge plate and the third hinge plate and the hinge shafts of the fifth hinge plate and the sixth hinge plate are all fixed on the sliding plate. The hinge shafts of the first hinge plate and the fourth hinge plate and the hinge shafts of the fifth hinge plate and the eighth hinge plate are all fixed on the fixed plate. The housing of the electric push rod is fixed to the first connecting plate, and the pushing rod is fixed to the second connecting plate. The fixed plate is fixed to the backrest plate; the sliding plate and the chair body form a sliding pair.

The driving mechanism includes a motor, an adjustable crankshaft, a first connecting rod, a second connecting rod, a third connecting rod, a first slide block, a second slide block and a third slide block. The adjustable crankshaft includes a first shaft section, a second shaft section, a third shaft section, a fourth shaft section, a first crank, a second crank, a third crank, a first stud, a second stud and a two-way nut. The first crank is composed of a first hinge shaft, two first curved plates and two first adjusting plates. Two first curved plates and two first adjusting plates respectively form a sliding pair. Opposite side surfaces of the two first adjustment plates are fixed to both ends of the first hinge shaft respectively. The second crank is composed of a second hinge shaft, two second curved plates and two second adjusting plates. Two second curved plates and two second adjusting plates respectively constitute a sliding pair. Opposite side surfaces of the two second adjustment plates are fixed to both ends of the second hinge shaft respectively. The one close to the second crank among the two first adjusting plates is fixed with the first stud. The one close to the first crank among the two second adjustment plates is fixed with the second stud. The external threads on the first stud and the second stud have opposite directions of rotation. The two ends of the inner wall of the two-way nut are provided with internal threads in opposite directions. The first stud and the second stud are threadedly connected to both ends of the inner wall of the two-way nut respectively. The third crank is composed of a third hinge shaft and two third curved plates. Opposite side surfaces of the two third curved plates are fixed to both ends of the third hinge shaft respectively.

One end of the first shaft section is supported on the chair body, and the other end is fixed to a first curved plate in the first crank. The first shaft section is driven by an electric motor. Another first curved plate in the first crank is fixed to one end of the second shaft section. The other end of the second shaft section is fixed with a second curved plate in the second crank. Another second crank plate in the second crank is fixed to one end of the third shaft section. The other end of the third shaft section is fixed with a third curved plate in the third crank. Another third crank plate in the third crank is fixed to one end of the fourth shaft section. The other end of the fourth shaft section is supported on the chair body. One end of the first connecting rod and the first hinge shaft form a rotating pair, and the other end is hinged with the first slide block. The first slide block and the chair body form a sliding pair. One end of the second connecting rod and the second hinge shaft form a rotating pair, and the other end is hinged with the second slide block. The second slide block and the chair body form a sliding pair. One end of the third connecting rod and the third hinge shaft form a rotating pair, and the other end is hinged with the third slider. The third slide block and the chair body form a sliding pair.

The arm stretching mechanism includes a rope, a first pulley, a second pulley, a support column and a handle. The two first pulleys arranged coaxially are both supported on the chair body. The bottom ends of the two support columns are fixed to the top of the backrest board. Two second pulleys arranged coaxially are respectively supported on the tops of the two support columns. One end of the two ropes is fixed to the first slide block and the second slide block respectively, and the other end is fixed to the two handles respectively. The two ropes go around the two first pulleys respectively and the two second pulleys respectively.

The leg-lifting mechanism includes a rack, a cylindrical gear, a drive shaft, a driving bevel gear and two lifting components. The rack is fixed to the third slider. The cylindrical gear and the driving bevel gear are both fixed to the drive shaft supported on the chair body. The cylindrical gear meshes with the rack. The lifting assembly includes a driven bevel gear, a rotating shaft, a legging strap and a third hinge plate group. The driven bevel gear is fixed to the rotating shaft supported on the chair body. The third hinge plate group includes a ninth hinge plate, a tenth hinge plate, an eleventh hinge plate and a twelfth hinge plate which are hinged from end to end to form a parallelogram. The ninth hinge plate arranged vertically is fixed to the chair body. The tenth hinge plate is fixed to the rotation axis. The axis of the rotation shaft is collinear with the axis of the hinge shaft of the ninth hinge plate and the tenth hinge plate. A legging strap is fixed on the eleventh hinge plate. The driven bevel gears in both lifting assemblies mesh with the driving bevel gears.

Further, the indexing cone angles of the driving bevel gear and the two driven bevel gears are both 45°. When the rack slides to the state farthest away from the adjustable crankshaft or slides to the state closest to the adjustable crankshaft, the tenth hinge plate in the third hinge plate group is in a horizontal state, and the other third hinge The tenth hinge plate in the plate group is tilted upward.

Further, the first shaft section, the second shaft section, the third shaft section and the fourth shaft section are coaxially arranged. The axes of the first hinge shaft, the second hinge shaft and the third hinge shaft are all parallel to the axis of the first shaft section and are not collinear. The axes of the first hinge axis and the second hinge axis are not collinear and are equidistant from the axis of the first axis segment. The axes of the first hinge axis, the second hinge axis and the first axis segment are in the same plane.

Further, the chair body includes horizontal plates, vertical plates and legs. One end of the horizontal plate is fixed to the inner surface of the vertical plate. The two corners of the bottom of the horizontal plate away from the vertical plate are fixed to the tops of the two legs respectively. The bottom ends of the two supporting legs are set at the same height as the bottom ends of the vertical boards.

Furthermore, two rows of fixing holes are provided on the inner side of the vertical plate, and the two rows of fixing holes and the two pulley frames are detachably fixed respectively. Two first pulleys arranged coaxially are respectively supported on two pulley frames.

Further, the motor is fixed to the chair body. The output shaft of the motor is fixed to the first shaft section.

Further, one end of the leggings strap is fixed with hook-surface Velcro, and the other end is fixed with rough-surface Velcro.

Further, the distance between the hinge axes of the ninth hinge plate and the tenth hinge plate and the hinge axes of the tenth hinge plate and the eleventh hinge plate is equal to 400 mm.

Further, the driven bevel gears in the two lifting assemblies are coaxially arranged.

Further, when one of the handles moves to the highest point, the tenth hinge plate located on the same side as the handle is in a horizontal state.

The beneficial effects of the present invention are:

1. The present invention can exercise the patient's hands and feet at the same time, and the exercise efficiency is higher.

2. The present invention can switch back and forth between sitting exercise and standing exercise, and the forms of exercise are more diverse, making the exercise process more interesting.

3. The present invention can assist the exerciser to complete the movements from sitting to standing, and enhances the patient's self-care ability during the exercise process.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a side view of the present invention;

Figure 3 is a perspective view of the present invention after assisting the user to stand;

Figure 4 is a perspective view of the standing assist mechanism in the present invention;

Figure 5 is a front view of the standing assist mechanism of the present invention;

Figure 6 is a schematic assembly diagram of the driving mechanism and the leg-lifting mechanism in the present invention;

Figure 7 is a first schematic diagram of the adjustable crankshaft in the present invention;

Figure 8 is a second schematic diagram of the adjustable crankshaft in the present invention;

Figure 9 is a perspective view of the leg lifting mechanism of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1, 2 and 3, a rehabilitation chair for simultaneous exercise of hands and feet includes a chair body 1, a seat cushion plate 2, a backrest plate 3, a standing auxiliary mechanism 4, a driving mechanism 5, an arm stretching mechanism 6 and a leg lift. Organization 7. The chair body 1 includes horizontal boards, vertical boards and legs. One end of the horizontal plate is fixed to the inner side of the vertical plate. The two corners of the bottom of the horizontal plate away from the vertical plate are fixed to the tops of the two legs respectively. The bottom ends of the two supporting legs are set at the same height as the bottom ends of the vertical boards. One end of the seat cushion plate 2 is hinged with the end of the top surface of the horizontal plate away from the vertical plate, and the other end is hinged with the bottom end of the backrest plate 3 . The top surface of the seat cushion plate 2 is used for the user to sit on.

As shown in Figures 1, 2, 3, 4 and 5, the standing auxiliary mechanism 4 provided between the backrest board 3 and the vertical board includes an electric push rod 4-1, a sliding plate 4-2, a fixed plate 4-3, A connecting plate 4-4, a second connecting plate 4-5, a first hinge plate group 4-6 and a second hinge plate group 4-7. The first hinge plate group 4-6 includes a first hinge plate, a second hinge plate, a third hinge plate and a fourth hinge plate that are hinged end to end to form a parallelogram. The first hinge plate, the second hinge plate, the third hinge plate and the fourth hinge plate are arranged counterclockwise in FIG. 5 . The second hinge plate group 4-7 includes a fifth hinge plate, a sixth hinge plate, a seventh hinge plate and an eighth hinge plate that are hinged from end to end to form a parallelogram. The fifth hinge plate, the sixth hinge plate, the seventh hinge plate and the eighth hinge plate are arranged counterclockwise in FIG. 5 . The hinge shaft of the first hinge plate and the second hinge plate is fixed at one end of the first connecting plate 4-4. The hinge axis of the fifth hinge plate and the sixth hinge plate is fixed at the other end of the first connecting plate 4-4. The hinge shaft of the third hinge plate and the fourth hinge plate is fixed at one end of the second connecting plate 4-5. The hinge shaft of the seventh hinge plate and the eighth hinge plate is fixed at the other end of the second connecting plate 4-5. The hinge shafts of the second hinge plate and the third hinge plate and the hinge shafts of the fifth hinge plate and the sixth hinge plate are all fixed on the sliding plate 4-2. The hinge shafts of the first hinge plate and the fourth hinge plate and the hinge shafts of the fifth hinge plate and the eighth hinge plate are all fixed on the fixed plate 4-3. The housing of the electric push rod 4-1 is fixed to the first connecting plate 4-4, and the pushing rod is fixed to the second connecting plate 4-5. The fixed plate 4-3 is fixed to the backrest plate 3. The sliding plate 4-2 and the vertical plate in the chair body 1 form a sliding pair. The expansion and contraction of the electric push rod 4-1 will cause the first hinge plate group 4-6 and the second hinge plate group 4-7 to move, adjust the distance between the sliding plate 4-2 and the fixed plate 4-3, and then promote the movement of the backrest plate. The longer the exposed pushing rod of the electric push rod 4-1 is, the smaller the distance between the sliding plate 4-2 and the fixed plate 4-3 is. Under the initial normal state, the push rod of the electric push rod 4-1 is pushed to the limit state, so that the seat cushion plate is in contact with the top surface of the horizontal plate.

As shown in Figures 1, 2, 6, 7 and 8, the driving mechanism 5 includes a motor 5-1, an adjustable crankshaft, a first connecting rod 5-3, a second connecting rod 5-4, and a third connecting rod 5-5. , the first slider 5-6, the second slider 5-7 and the third slider 5-8. The motor 5-1 is fixed to the chair body 1. The adjustable crankshaft includes a first shaft section 5-2, a second shaft section 5-9, a third shaft section 5-10, a fourth shaft section 5-11, a first crank 5-12, a second crank 5-13, The third crank 5-14, the first stud 5-15, the second stud 5-16 and the two-way nut 5-17. The first crank 5-12 is composed of a first hinge shaft, two first curved plates and two first adjusting plates. Two first curved plates and two first adjusting plates respectively form a sliding pair. Opposite side surfaces of the two first adjustment plates are fixed to both ends of the first hinge shaft respectively. The second crank 5-13 is composed of a second hinge shaft, two second curved plates and two second adjusting plates. Two second curved plates and two second adjusting plates respectively constitute a sliding pair. Opposite side surfaces of the two second adjustment plates are fixed to both ends of the second hinge shaft respectively. Among the two first adjusting plates, the one close to the second crank 5-13 is fixed with the first stud 5-15. Among the two second adjustment plates, the one close to the first crank 5-12 is fixed with the second stud 5-16. The external threads on the first stud 5-15 and the second stud 5-16 have opposite directions. The two ends of the inner wall of the two-way nut 5-17 are provided with internal threads with opposite rotational directions. The first stud 5-15 and the second stud 5-16 are threadedly connected to both ends of the inner wall of the two-way nut 5-17 respectively. Rotating the two-way nut 5-17 can cause the first stud 5-15 and the second stud 5-16 to move toward or away from each other, thereby realizing the first hinge axis, the second hinge axis axis and the first shaft segment 5 The distance between -2 axes adjusts the amplitude of arm stretching movement. The third crank 5-14 is composed of a third hinge shaft and two third curved plates. Opposite side surfaces of the two third curved plates are fixed to both ends of the third hinge shaft respectively.

One end of the first shaft section 5-2 is supported on the vertical plate in the chair body 1 and is fixed to the output shaft of the motor 5-1, and the other end is fixed to a first curved plate in the first crank 5-12. Another first curved plate in the first crank 5-12 is fixed to one end of the second shaft section 5-9. The other end of the second shaft section 5-9 is fixed with a second curved plate in the second crank 5-13. Another second curved plate in the second crank 5-13 is fixed to one end of the third shaft section 5-10. The other end of the third shaft section 5-10 is fixed with a third curved plate in the third crank 5-14. Another third curved plate in the third crank 5-14 is fixed to one end of the fourth shaft section 5-11. The other end of the fourth shaft section 5-11 is supported on the vertical plate in the chair body 1. The first shaft section 5-2, the second shaft section 5-9, the third shaft section 5-10 and the fourth shaft section 5-11 are coaxially arranged. The axes of the first hinge shaft, the second hinge shaft and the third hinge shaft are all parallel to the axis of the first shaft section 5-2 and are not collinear. The axes of the first hinge shaft and the second hinge shaft are not collinear, and the distance to the axis of the first shaft section 5-2 is equal. The axes of the first hinge shaft, the second hinge shaft and the first shaft section 5-2 are on the same axis. within the plane. One end of the first connecting rod 5-3 forms a rotating pair with the first hinge shaft, and the other end is hinged with the first slider 5-6. The first slide block 5-6 and the vertical plate form a sliding pair that slides in the vertical direction. One end of the second connecting rod 5-4 forms a rotating pair with the second hinge shaft, and the other end is hinged with the second slider 5-7. The second slide block 5-7 and the vertical plate form a sliding pair that slides in the vertical direction. One end of the third connecting rod 5-5 forms a rotating pair with the third hinge shaft, and the other end is hinged with the third slider 5-8. The third slide block 5-8 and the horizontal plate form a sliding pair that slides in the horizontal direction. The rotating adjustable crankshaft drives the first slide block 5-6 and the second slide block 5-7 to slide up and down, and drives the third slide block 5-8 to slide horizontally. Since the first hinge shaft and the second hinge shaft are arranged on both sides of the axis of the first shaft section, the sliding directions of the first slide block 5 - 6 and the second slide block 5 - 7 are opposite, thereby realizing the first slide block 5 -6 with staggered sliding of the second slider 5-7.

As shown in Figures 1, 2 and 3, the arm stretching mechanism 6 includes a rope 6-1, a first pulley 6-2, a second pulley 6-3, a support column 6-4 and a handle 6-5. There are two rows of fixing holes on the inner side of the vertical plate, and the two rows of fixing holes and the two pulley frames are removable and fixed respectively. Two first pulleys 6-2 arranged coaxially are respectively supported on two pulley frames. By fixing the pulley frame with different fixing holes, the height of the handle 6-5 can be adjusted. The bottom ends of the two support columns 6-4 are fixed to the top ends of the backrest board 3. Two second pulleys 6-3 arranged coaxially are respectively supported on the tops of the two support columns 6-4. One end of the two ropes 6-1 is fixed to the first slider 5-6 and the second slider 5-7 respectively, and the other end is fixed to the two handles 6-5 respectively. The two ropes 6-1 respectively go around the two first pulleys 6-2, and respectively go around the two second pulleys 6-3. The staggered sliding first slider 5-6 and the second slider 5-7 can pull the two ropes 6-1 to move in a staggered manner, thereby causing the two handles 6-5 to move in an staggered manner, allowing the user to hold the two handles respectively. Stagger up and down stretching movements with both hands on 6-5.

As shown in Figures 1, 2 and 9, the leg lifting mechanism 7 includes a rack 7-1, a cylindrical gear 7-2, a drive shaft 7-3, a driving bevel gear 7-4 and two lifting components. The rack 7-1 is fixed to the third slider 5-8. The cylindrical gear 7-2 and the driving bevel gear 7-4 are both fixed to the drive shaft 7-3 supported on the bottom surface of the transverse plate in the chair body 1. The drive shaft 7-3 is arranged vertically. The cylindrical gear 7-2 meshes with the rack. The lifting assembly includes a driven bevel gear 7-5, a rotating shaft 7-6, a legging strap 7-7 and a third hinge plate group. The driven bevel gear 7-5 is fixed to the rotating shaft 7-6 supported on the bottom surface of the transverse plate in the chair body 1. The rotating shaft 7-6 is set horizontally. The third hinge plate group includes a ninth hinge plate 7-8, a tenth hinge plate 7-9, an eleventh hinge plate 7-10 and a twelfth hinge plate 7-11 which are hinged end to end to form a parallelogram. The vertically arranged ninth hinge plates 7-8 are fixed to the chair body 1. The tenth hinge plate 7-9 is fixed to the rotating shaft 7-6. The axis of the rotation shaft 7-6 is collinear with the axes of the hinge shafts of the ninth hinge plate 7-8 and the tenth hinge plate 7-9. Two legging straps 7-7 are fixed on the eleventh hinge plate 7-10. One end of the legging straps 7-7 is fixed with hook-surface Velcro, and the other end is fixed with rough-surface Velcro. Encircle the user's calf with the legging strap 7-7 and connect the Velcro to fix the user's calf and the eleventh hinge plate 7-10 together. The distance between the hinge axes of the ninth hinge plate 7-8 and the tenth hinge plate 7-9 and the hinge axes of the tenth hinge plate 7-9 and the eleventh hinge plate 7-10 is equal to 400 mm. The distance of 400mm is approximately the length of a human thigh. This enables the third hinge plate group to simulate the human body's leg-raising movements to the greatest extent when sitting upright. Because the ninth hinge plate 7-8, the tenth hinge plate 7-9, the eleventh hinge plate 7-10 and the twelfth hinge plate 7-11 form a parallelogram. Therefore, the eleventh hinge plate 7-10 is always horizontal to the ninth hinge plate 7-8, that is, it remains vertical.

The driven bevel gears 7-5 in the two lifting assemblies are respectively located on both sides of the driving bevel gear 7-4, and both mesh with the driving bevel gear 7-4. The driven bevel gears 7-5 in the two lifting assemblies are coaxially arranged. The indexing cone angles of the driving bevel gear 7-4 and the two driven bevel gears 7-5 are both 45°. When the rack slides to the state farthest away from the adjustable crankshaft or when it slides to the state closest to the adjustable crankshaft, the tenth hinge plate in one third hinge plate group is in a horizontal state, and the tenth hinge plate in the other third hinge plate group is in a horizontal state. The tenth hinge plate is tilted upward. That is, the horizontal state is a state in which the two tenth hinge plates 7-9 are at the lower pole. Since the two driven bevel gears 7-5 are respectively located on both sides of the driving bevel gear 7-4, the turning moments of the two rotating shafts 7-6 are opposite, which in turn causes the two tenth hinge plates 7-9 to rotate alternately, achieving The user lifts his legs staggered.

When one of the handles 6-5 moves to the highest point, the tenth hinge plate 7-9 located on the same side as the handle 6-5 is in a horizontal state.

The working principles of the present invention are divided into sitting exercise principles, assisted standing principles and standing exercise principles.

The principles of sitting exercises are as follows:

The user sits on the cushion board 2 and binds the user's legs with the legging straps 7-7 on the two eleventh hinge boards 7-10 respectively. The user holds the two handles 6-5 with both hands respectively. Motor 5-1 starts and drives the adjustable crankshaft to rotate. The rotation of the adjustable crankshaft simultaneously drives the first slide block 5-6, the second slide block 5-7 and the third slide block 5-8 to slide back and forth. Since the sliding directions of the first slider 5-6 and the second slider 5-7 are opposite, the user's two hands respectively held on the two handles 6-5 can achieve staggered up and down stretching movements.

The reciprocating sliding of the third slider 5-8 drives the rack to reciprocate, and the rack drives the cylindrical gear 7-2 to rotate forward and reverse cyclically. The driving bevel gear 7-4 rotates with the rotation of the cylindrical gear 7-2. Since the two driven bevel gears 7-5 are respectively located on both sides of the driving bevel gear 7-4, the turning moments of the two rotating shafts 7-6 are opposite, which in turn causes the two tenth hinge plates 7-9 to rotate alternately, achieving The user lifts his legs staggered. When one of the handles 6-5 moves upward, the tenth hinge plate 7-9 located on the same side as the handle 6-5 flips downwards. It avoids the situation of using the same hands and feet during exercise, which greatly improves the effect of exercise.

The specific principles of assisted standing are as follows:

The user sits on the cushion board 2 and ensures that both legs are not tied by the leggings 7-7. The electric push rod 4-1 retracts, the distance between the sliding plate 4-2 and the fixed plate 4-3 increases, the sliding plate 4-2 slides upward, and the backrest plate moves upward along with the fixed plate 4-3. The backrest plate remains upright at all times during movement. And the back cushion plate drives the seat cushion plate 2 to turn over, and the angle formed by the back cushion plate and the seat cushion plate 2 gradually increases. After the angle between the back cushion plate and the seat cushion plate 2 reaches 180°, the electric push rod 4-1 stops retracting. At this time, the back cushion plate and the seat cushion plate 2 are on the same vertical plane, and the user completes the action from sitting to standing. Since the support column 6-4 supporting the second pulley 6-3 is fixed on the cushion plate, the two second pulleys 6-3 move with the movement of the cushion plate. While the user is standing, the relative positions of the two second pulleys 6-3 and the user's hands do not change.

The principles of standing exercise are as follows:

After the user is assisted to stand up, he holds the two handles 6-5 with both hands. Motor 5-1 starts and drives the adjustable crankshaft to rotate. The rotation of the adjustable crankshaft simultaneously drives the first slide block 5-6 and the second slide block 5-7 to slide back and forth. Since the sliding directions of the first slider 5-6 and the second slider 5-7 are opposite, the user's two hands respectively held on the two handles 6-5 can achieve staggered up and down stretching movements. At this time, the movement of the leg-lifting mechanism 7 does not affect the user.

Claims (8)

1. A rehabilitation chair for hand and foot synchronous exercise comprises a chair body, a cushion plate, a back plate, a standing auxiliary mechanism, a driving mechanism, an arm stretching mechanism and a leg lifting mechanism; the method is characterized in that: one end of the cushion plate is hinged with the chair body, and the other end of the cushion plate is hinged with the bottom end of the backboard;

the standing auxiliary mechanism comprises an electric push rod, a sliding plate, a fixed plate, a first connecting plate, a second connecting plate, a first hinge plate group and a second hinge plate group; the first hinge plate group comprises a first hinge plate, a second hinge plate, a third hinge plate and a fourth hinge plate which are sequentially hinged into a parallelogram from end to end; the second hinge plate group comprises a fifth hinge plate, a sixth hinge plate, a seventh hinge plate and an eighth hinge plate which are hinged into a parallelogram from end to end in sequence; the hinge shafts of the first hinge plate and the second hinge plate are fixed at one end of the first connecting plate; the hinge shafts of the fifth hinge plate and the sixth hinge plate are fixed at the other end of the first connecting plate; the hinge shafts of the third hinge plate and the fourth hinge plate are fixed at one end of the second connecting plate; the hinge shafts of the seventh hinge plate and the eighth hinge plate are fixed at the other end of the second connecting plate; the hinge shafts of the second hinge plate and the third hinge plate and the hinge shafts of the fifth hinge plate and the sixth hinge plate are fixed on the sliding plate; the hinge shafts of the first hinge plate and the fourth hinge plate and the hinge shafts of the fifth hinge plate and the eighth hinge plate are fixed on the fixed plate; the shell of the electric push rod is fixed with the first connecting plate, and the push rod is fixed with the second connecting plate; the fixed plate is fixed with the backboard; the sliding plate and the chair body form a sliding pair;

the driving mechanism comprises a motor, an adjustable crankshaft, a first connecting rod, a second connecting rod, a third connecting rod, a first sliding block, a second sliding block and a third sliding block; the adjustable crankshaft comprises a first shaft section, a second shaft section, a third shaft section, a fourth shaft section, a first crank, a second crank, a third crank, a first stud, a second stud and a bidirectional nut; the first crank consists of a first hinge shaft, two first bent plates and two first adjusting plates; the two first curved plates and the two first adjusting plates respectively form sliding pairs; opposite side surfaces of the two first adjusting plates are respectively fixed with two ends of the first hinge shaft; the second crank consists of a second hinge shaft, two second curved plates and two second adjusting plates; the two second curved plates and the two second adjusting plates respectively form sliding pairs; opposite side surfaces of the two second adjusting plates are respectively fixed with two ends of the second hinge shaft; the two first adjusting plates close to the second crank are fixed with the first stud; the second adjusting plate is fixed with the second stud close to the first crank; the external threads on the first stud and the second stud are opposite in rotation direction; two ends of the inner wall of the bidirectional nut are provided with internal threads with opposite screwing directions; the first stud and the second stud are respectively in threaded connection with two ends of the inner wall of the bidirectional nut; the third crank consists of a third hinge shaft and two third curved plates; opposite side surfaces of the two third curved plates are respectively fixed with two ends of the third hinging shaft;

one end of the first shaft section is supported on the chair body, and the other end of the first shaft section is fixed with a first curved plate in the first crank; the first shaft section is driven by a motor; the other first curved plate in the first crank is fixed with one end of the second shaft section; the other end of the second shaft section is fixed with a second curved plate in the second crank; the other second curved plate in the second crank is fixed with one end of the third shaft section; the other end of the third shaft section is fixed with a third curved plate in a third crank; the other third curved plate in the third crank is fixed with one end of the fourth shaft section; the other end of the fourth shaft section is supported on the chair body; one end of the first connecting rod and the first hinging shaft form a revolute pair, and the other end of the first connecting rod is hinged with the first sliding block; the first sliding block and the chair body form a sliding pair; one end of the second connecting rod and the second hinging shaft form a revolute pair, and the other end of the second connecting rod is hinged with the second sliding block; the second sliding block and the chair body form a sliding pair; one end of the third connecting rod and the third hinging shaft form a revolute pair, and the other end of the third connecting rod is hinged with the third sliding block; the third sliding block and the chair body form a sliding pair;

the arm stretching mechanism comprises a rope, a first pulley, a second pulley, a support column and a handle; two first pulleys arranged coaxially are supported on the chair body; the bottom ends of the two support columns are fixed with the top end of the backboard; two second pulleys arranged coaxially are respectively supported at the top ends of the two support columns; one end of each rope is respectively fixed with the first sliding block and the second sliding block, and the other end of each rope is respectively fixed with the two handles; the two ropes respectively pass around the two first pulleys and respectively pass around the two second pulleys;

the leg lifting mechanism comprises a rack, a cylindrical gear, a driving shaft, a driving bevel gear and two lifting assemblies; the rack is fixed with the third sliding block; the cylindrical gear and the drive bevel gear are fixed with a driving shaft supported on the chair body; the cylindrical gear is meshed with the rack; the lifting assembly comprises a driven bevel gear, a rotating shaft, a leg tying belt and a third hinge plate group; the driven bevel gear is fixed with a rotating shaft supported on the chair body; the third hinge plate group comprises a ninth hinge plate, a tenth hinge plate, an eleventh hinge plate and a twelfth hinge plate which are sequentially hinged end to form a parallelogram; the ninth hinge plate arranged vertically is fixed with the chair body; the tenth hinging plate is fixed with the rotating shaft; the axis of the rotating shaft is collinear with the axis of the hinge shaft of the ninth hinge plate and the tenth hinge plate; a leg tying belt is fixed on the eleventh hinging plate; driven bevel gears in the two lifting assemblies are meshed with the driving bevel gears;

the indexing cone angles of the driving bevel gear and the two driven bevel gears are 45 degrees; the rack slides to the state of being farthest from the adjustable crankshaft or slides to the state of being closest to the adjustable crankshaft, a tenth hinging plate in one third hinging plate group is in a horizontal state, and a tenth hinging plate in the other third hinging plate group is inclined upwards;

the first shaft section, the second shaft section, the third shaft section and the fourth shaft section are coaxially arranged; the axes of the first hinge shaft, the second hinge shaft and the third hinge shaft are parallel and not collinear with the axis of the first shaft section; the axes of the first hinge shaft and the second hinge shaft are not collinear, the distances from the axes of the first shaft section are equal, and the axes of the first hinge shaft, the second hinge shaft and the first shaft section are in the same plane.

2. The rehabilitation chair for hand and foot synchronous exercise according to claim 1, wherein: the chair body comprises a transverse plate, a vertical plate and supporting legs; one end of the transverse plate is fixed with the inner side surface of the vertical plate; two corners of the bottom surface of the transverse plate, which are far away from the vertical plate, are respectively fixed with the top ends of the two supporting legs; the bottom of two landing legs is equal to the bottom of riser high setting.

3. A rehabilitation chair for simultaneous hand and foot exercises according to claim 2, wherein: two rows of fixing holes are formed in the inner side surface of the vertical plate, and the two rows of fixing holes and the two pulley frames are respectively detachably fixed; two first pulleys arranged coaxially are respectively supported on the two pulley frames.

4. The rehabilitation chair for hand and foot synchronous exercise according to claim 1, wherein: the motor is fixed with the chair body; an output shaft of the motor is fixed with the first shaft section.

5. The rehabilitation chair for hand and foot synchronous exercise according to claim 1, wherein: one end of the leg-binding belt is fixed with a hook-face magic tape, and the other end is fixed with a wool-face magic tape.

6. The rehabilitation chair for hand and foot synchronous exercise according to claim 1, wherein: and the distances between the hinge shafts of the ninth hinge plate and the tenth hinge plate and the hinge shafts of the tenth hinge plate and the eleventh hinge plate are equal to 400mm.

7. The rehabilitation chair for hand and foot synchronous exercise according to claim 1, wherein: driven bevel gears in the two lifting assemblies are coaxially arranged.

8. The rehabilitation chair for hand and foot synchronous exercise according to claim 1, wherein: and in a state that one of the handles moves to the highest point, the tenth hinge plate positioned on the same side with the handle is in a horizontal state.