CN211460899U - Standing auxiliary wheelchair - Google Patents

Abstract

The utility model discloses an auxiliary wheelchair stands belongs to wheelchair technical field. The utility model discloses an auxiliary wheelchair stands, including frame, wheel, chair cushion and the back of the chair, the frame include back of the chair dead lever, dead lever connecting rod, chair cushion dead lever, handrail frame, wheel mounting bracket and drive mechanism, wherein back of the chair dead lever fixed mounting is in the both ends of dead lever connecting rod, handrail frame fixed mounting is on chair cushion dead lever, and chair cushion dead lever and wheel mounting bracket are fixed to link to each other, drive mechanism includes gear and driving rack, the gear is installed on the dead lever connecting rod, and the both ends of dead lever connecting rod are rotatable to be installed on the rear wheel installation pole of wheel mounting bracket, driving rack links to each other with the fixed phase of chair cushion rear end and meshes with the gear mutually. Adopt the technical scheme of the utility model convenient to use person stands from the wheelchair, and easy operation, it only need simple back to move make the chair cushion slope certain angle can.

Description

Standing auxiliary wheelchair

Technical Field

The utility model belongs to the technical field of the wheelchair, more specifically say, relate to an auxiliary wheelchair stands.

Background

The whole world has gradually entered into the aging society, and the old people gradually have lower mobility and physical strength than others due to the degradation of physical functions; moreover, the cardiovascular and cerebrovascular diseases of China tend to be high-grade year by year, and more patients with stroke and hemiplegia caused by the cardiovascular and cerebrovascular diseases are in the future; and many physical handicaps caused by accidents or congenital reasons, the demand of wheelchairs for such people is increasing. The disabled people, the stroke patients or the old people cannot exert force by feet, so that the people are inconvenient to stand by themselves and often need to walk by means of a wheelchair.

However, when a person with a disabled leg, a stroke patient, or an elderly person takes a wheelchair and keeps a sitting posture in the wheelchair for a long time, discomfort is extremely likely to occur. Although the wheelchair on the market has various and practical functions, most of the wheelchairs only consider the function diversity but not other problems, so when a person who is inconvenient to walk stands up from the wheelchair, the person needs help of others to stand up and then take the crutch to walk, and great inconvenience and puzzlement are caused to the person who is inconvenient to stand up and a caregiver of the person. Meanwhile, when other people are supported, the wheelchair is difficult to sit up directly from the wheelchair due to the obstruction of the armrests or other places.

Through retrieval, related patents have been published on wheelchairs that facilitate the user to stand up. For example, the chinese patent application No. 201510189562.X discloses a chair for assisting the elderly to stand, the chair cushion and the base of the chair form a rotating pair, a lifting rod is connected below the chair cushion, and the chair cushion rotates around the base under the thrust action of the lifting rod, thereby realizing the function of assisting the elderly to stand. The application does not describe the number and the installation positions of the lifting rods, if the lifting rods are installed on one side of the chair cushion, the chair cushion is deformed due to uneven stress, and then the condition that one side of the chair cushion is lifted first and the other side of the chair cushion is lifted later is generated; if the lifting rods are installed on both sides of the seat cushion, it is difficult to keep the two lifting rods synchronized.

For another example, chinese patent application No. 201720038893.8 discloses a fully automatic wheelchair that is capable of being electrically controlled while standing. However, these devices are electrically powered and relatively expensive, and few devices are available to assist the user in standing up through simple and easy movements of the physically handicapped person.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

To the problem that current wheelchair not convenient to use person stood, the utility model provides a supplementary wheelchair stands adopts the technical scheme convenient to use person stands from the wheelchair, and easy operation, it only need simple back lean on the action make the chair cushion slope certain angle can.

2. Technical scheme

In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:

the utility model discloses an auxiliary wheelchair stands, including frame, wheel, chair cushion and the back of the chair, the frame include back of the chair dead lever, dead lever connecting rod, chair cushion dead lever, handrail frame, wheel mounting bracket and drive mechanism, wherein back of the chair dead lever fixed mounting is in the both ends of dead lever connecting rod, handrail frame fixed mounting is on chair cushion dead lever, and chair cushion dead lever and wheel mounting bracket are fixed to link to each other, drive mechanism includes gear and driving rack, the gear is installed on the dead lever connecting rod, and the both ends of dead lever connecting rod are rotatable to be installed on the rear wheel installation pole of wheel mounting bracket, driving rack links to each other with the chair cushion rear end fixed phase and meshes with the gear mutually.

Furthermore, both sides of the chair cushion are supported and installed on the chair cushion fixing rod through a row of supporting hinges, and the length of the supporting hinges is gradually shortened along the direction away from the chair back.

Furthermore, the locking reset mechanism comprises a control rod, two different side faces of the control rod are respectively provided with a movable ratchet and a fixed ratchet, the fixed ratchet is fixedly arranged on the control rod, the movable ratchet can be vertically and rotatably arranged on the control rod, the transmission rack is correspondingly provided with fixed teeth matched with the movable ratchet and the fixed ratchet, downward movement of the transmission rack is limited through matching of the movable ratchet and the fixed teeth, and upward and downward movement of the transmission rack is limited through matching of the fixed ratchet and the fixed teeth.

Furthermore, the lower surfaces of the movable ratchet and the fixed ratchet are both arc-shaped structures, the upper surfaces of the movable ratchet and the fixed ratchet are both planar structures, and a return spring is arranged between the upper surface of the movable ratchet and the control rod.

Furthermore, the top of the transmission rack is connected with an annular cylinder through a connecting rod, the annular cylinder is positioned in a handrail fixing cylinder close to the chair back, and a sliding groove for the connecting rod to pass through and move up and down is formed in the side wall of the handrail fixing cylinder; the control rod is rotatably arranged in the handrail fixing cylinder and penetrates through the annular cylinder, and the fixing teeth are arranged on the inner wall of the annular cylinder.

Furthermore, the fixed rod connecting rod is arranged in the angle adjusting sleeve, a limiting groove for the chair back fixed rod to penetrate out is processed on the angle adjusting sleeve, and a first reducing spring is arranged between the chair back fixed rod and the angle adjusting sleeve.

Furthermore, a first fixed cylinder and a second fixed cylinder which are concentrically arranged are fixed on the rear wheel mounting rod, two ends of the fixed rod connecting rod are rotatably arranged in the second fixed cylinder, and two ends of the angle adjusting sleeve are correspondingly arranged between the first fixed cylinder and the second fixed cylinder; the gear is installed in the outside of first fixed cylinder, and the outside that lies in two back of the chair dead levers on the dead lever connecting rod all is provided with first dog, and the gear inner wall is provided with the second dog with first dog matched with, and processing has on the first fixed cylinder to supply the second dog to pass and pivoted circular arc groove.

Furthermore, the first fixed cylinder is processed into a step-type structure consisting of a first cylinder section and a second cylinder section, the outer diameter of the first cylinder section is larger than the outer diameter of the second cylinder section and the inner diameter of the gear, the gear is sleeved outside the second cylinder section, a screw hole is formed in the second cylinder section, and a limit bolt is installed in the screw hole.

Furthermore, the two ends of the angle adjusting sleeve are both provided with clamping grooves distributed along the circumferential direction of the angle adjusting sleeve, the rear wheel mounting rod is provided with a locking piece matched with the clamping grooves, and the angle adjusting sleeve is locked and positioned through the matching of the locking piece and the clamping grooves.

Furthermore, the locking piece include spacing ball, spring, end spring ware and spacing pin, processing has along transverse distribution's perforation on the rear wheel installation pole, and the one end of spacing pin is passed and is perforated fixedly with spacing ball and link to each other, and the diameter of spacing ball is greater than the perforation internal diameter, but the other end and the draw-in groove block cooperation of spacing pin, and the middle part of spacing pin is equipped with ends the spring ware, spacing ball and end and be equipped with the spring between the spring ware, the spring reaches and ends the spring ware and all be located the perforation inside of rear wheel installation pole.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses an auxiliary wheelchair stands, its frame includes back of the chair dead lever, dead lever connecting rod, chair cushion dead lever, handrail frame, wheel mounting bracket and drive mechanism, drive mechanism includes gear and driving rack, the gear is installed on the dead lever connecting rod, when the wheelchair user need stand, lean on the back of the chair backward, dead lever connecting rod and back of the chair dead lever take place to rotate for rear wheel installation pole, thereby drive gear takes place to rotate, the rotatory driving rack upward movement that drives of gear, thereby drive chair cushion rear end upward movement, the chair cushion takes place to incline promptly, the wheelchair user then can stand with the help of the effect of handrail or walking stick this moment, the problem that current wheelchair is not convenient for the user to stand is solved.

(2) The utility model discloses an auxiliary wheelchair stands, the both sides of chair cushion are all supported through one row of support hinge and are installed on chair cushion dead lever, and the length that supports the hinge shortens gradually along the direction of keeping away from the back of the chair, can ensure through the setting of supporting the hinge that the chair cushion takes place the slope forward when following the drive rack upward movement, therefore convenient to use person stands, can also improve the fastness that the chair cushion rises in-process and supports simultaneously.

(3) The utility model discloses a supplementary wheelchair stands still includes locking canceling release mechanical system, and the cooperation of fixed tooth can lock transmission rack on activity ratchet and fixed ratchet and the transmission rack through locking canceling release mechanical system, prevents among the normal use, the chair pad in-process that rises and the user chair pad descends when standing. When the wheelchair user sits down again after standing up, the locking reset mechanism is unlocked to the transmission rack, and the transmission rack and the chair cushion can move downwards to be restored under the action of the gravity of the user. The utility model discloses well transmission rack's top is connected with the annular cylinder through the connecting rod, and this annular cylinder is located the fixed section of thick bamboo of handrail near the back of the chair, consequently can lead the up-and-down motion of transmission rack through the fixed section of thick bamboo of handrail, guarantees the stationarity of its motion.

(4) The utility model discloses an auxiliary wheelchair stands, the dead lever connecting rod is installed in angle modulation sleeve, can control the rotation angle of dead lever connecting rod through angle modulation telescopic setting, still is equipped with first reducing spring between back of the chair dead lever and the angle modulation sleeve, after the user stands up, can make the back of the chair automatic emergence recover under the spring action of first reducing spring.

(5) The utility model discloses an auxiliary wheelchair stands, the draw-in groove that distributes along its circumference has all been processed at angle modulation sleeve's both ends, install on the rear wheel installation pole with draw-in groove matched with lock piece, because different users are different to back of the chair inclination's requirement, can adjust the rotation angle of back of the chair dead lever through angle modulation sleeve's position, then lock the location through the cooperation angle modulation sleeve of lock piece and draw-in groove, therefore can satisfy different users' user demand.

Drawings

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

fig. 2 is a schematic view of the mounting structure of the transmission mechanism of the present invention;

fig. 3 is a schematic view (one) of the mounting structure of the fixed rod connecting rod of the present invention;

fig. 4 is a schematic view (ii) of the mounting structure of the dead lever connecting rod of the present invention;

FIG. 5 is a schematic structural view of the rear wheel mounting bar of the present invention;

fig. 6 is a schematic view of the mounting structure of the fixed rod connecting rod and the angle adjusting sleeve of the present invention;

FIG. 7 is a schematic view of the installation structure of the chair cushion of the present invention;

fig. 8 is a schematic view of an installation structure of the locking member of the present invention;

fig. 9 is a schematic structural view of the locking member of the present invention;

fig. 10 is an enlarged schematic view of a partial mounting structure of the transmission mechanism of the present invention;

fig. 11 is a schematic view of the installation structure of the transmission mechanism and the locking reset mechanism of the present invention;

fig. 12 is a schematic view of the mounting structure of the control lever of the present invention;

fig. 13 is an assembly structure diagram of the locking reset mechanism of the present invention;

fig. 14 is a partially enlarged schematic structural view of the control lever of the present invention;

fig. 15 is a schematic structural view of the driving rack of the present invention.

In the figure: 100. a seat cushion; 101. fixing a pin shaft; 102. a support hinge; 103. a buffer spring; 200. an angle adjustment sleeve; 201. a card slot; 202. a locking member; 2021. a limiting ball; 2022. a spring; 2023. a spring stopper; 2024. a limit pin; 301. a chair back fixing rod; 302. a fixed rod connecting rod; 303. a first stopper; 304. a first return spring; 401. a gear; 402. a drive rack; 403. a second stopper; 404. an annular cylinder; 405. fixing teeth; 406. a connecting rod; 500. a wheel mounting bracket; 501. a rear wheel mounting bar; 502. a first fixed cylinder; 5021. a first barrel section; 5022. a second barrel section; 503. a second fixed cylinder; 504. rotating the fixed column; 505. a screw hole; 506. perforating; 600. a chair back; 700. a handrail frame; 701. a handrail; 702. a handrail fixing cylinder; 7021. a chute; 7022. a top cover; 800. a chair cushion fixing rod; 900. locking the reset mechanism; 901. A control lever; 902. a movable ratchet; 903. fixing the ratchet; 904. rotating the cylindrical section; 905. a free surface; 906. a return spring.

Detailed Description

The present invention will be further described with reference to the following specific embodiments.

Example 1

With reference to fig. 1 to 15, the standing assistance wheelchair of the present embodiment includes a frame, wheels (including rear wheels and front wheels), a seat cushion 100, a seat back 600, a pedal, a transmission mechanism, and a locking and resetting mechanism, wherein the frame includes a seat back fixing rod 301, a fixing rod connecting rod 302, a seat cushion fixing rod 800, a handrail frame 700, and a wheel mounting frame 500, wherein the seat back fixing rod 301 is vertically installed at two ends of the fixing rod connecting rod 302, the seat back 600 is installed between the seat back fixing rods 301, the seat cushion fixing rod 800 is installed at two sides of the fixing rod connecting rod 302 along a horizontal direction, and the seat cushion 100 is installed between two seat cushion fixing rods; the wheel mounting frame 500 and the armrest frame 700 are both fixedly connected with the seat cushion fixing rod 800, and the armrest 701 and the wheels are respectively and correspondingly mounted on the armrest frame 700 and the wheel mounting frame 500.

Specifically, as shown in fig. 1, the wheel mounting frame 500 includes a rear wheel mounting rod 501, a front wheel mounting rod and a connecting cross rod, two ends of the connecting cross rod are respectively fixedly connected with the rear wheel mounting rod 501 and the bottom of the front wheel mounting rod, the rear wheel is correspondingly mounted on the rear wheel mounting rod 501, and the front wheel is correspondingly mounted on the front wheel mounting rod. The armrest frame 700 includes two armrest fixing cylinders 702 vertically installed on the cushion fixing rod 800 and an armrest support rod transversely connected between the two armrest fixing cylinders 702, and the armrest 701 is supported and installed on the armrest support rod.

Referring to fig. 2 to 6, the transmission mechanism includes a gear 401 and a transmission rack 402, in this embodiment, two ends of the fixed rod connecting rod 302 are rotatably mounted on the rear wheel mounting rod 501, the gear 401 is sleeved on the fixed rod connecting rod 302, and the transmission rack 402 is correspondingly mounted at the rear end of the seat cushion 100 and meshed with the gear 401. Specifically, the rear end of the seat cushion 100 is provided with a fixed pin 101, and the transmission rack 402 is fixedly connected with the seat cushion 100 through the fixed pin 101. In the outside of dead lever connecting rod 302 is equipped with angle adjusting sleeve 200 in this embodiment, processing has the spacing groove that supplies back of the chair dead lever 301 to wear out on the angle adjusting sleeve 200, can carry out spacing and control through the spacing groove to the rotation of back of the chair dead lever 301 simultaneously.

As shown in fig. 7, both sides of the seat cushion 100 are supported and mounted on the seat cushion fixing rod 800 through a row of supporting hinges 102, and the length of the supporting hinges 102 is gradually shortened from back to front (i.e. along the direction away from the seat back 600), the rear end of the seat cushion 100 is bent downward to form a certain arc, a buffer spring 103 is arranged between the bottom of the front end of the seat cushion 100 and the seat cushion fixing rod 800, and the buffer spring 103 is in a compressed state when the wheelchair is in a normal state.

When the user needs to stand, its health hypsokinesis, it takes place anticlockwise rotation for rear wheel installation pole 501 to promote dead lever connecting rod 302 through back of the chair dead lever 301, thereby it takes place to rotate to drive gear 401, gear 401 rotates and drives transmission rack 402 upward movement, thereby it rises to drive the rear side of seat cushion 100, the certain angle that leans forward is in the seat cushion 100 promptly, when back of the chair dead lever 301 rotates to the spacing groove edge of angle adjusting sleeve 200 the rotation of stopping promptly, seat cushion 100 stops rising this moment, the user alright stand from the wheelchair. In the process that the rear side of the seat cushion 100 gradually rises and inclines, the support hinge 102 rotates along with the seat cushion 100, so that the suspended seat cushion 100 can be supported, and the stability of the seat cushion structure is ensured. A first restoring spring 304 is disposed between the chair back fixing rod 301 and the angle adjusting sleeve 200, and when the first restoring spring 304 is located at a side close to the chair cushion 100, it is in an original length or extension state in a normal state, and when the first restoring spring 304 is located at a side far from the chair cushion 100, it is in an original length or compression state in a normal state, so that when the user leans forward and the chair back 600 loses the reclining force, the chair back 600 is gradually restored under the action of the first restoring spring 304, that is, it is restored to a vertical state.

As shown in fig. 10-15, the locking reset mechanism 900 of the present embodiment includes a control rod 901, the control rod 901 is rotatably installed in an armrest fixing tube 702 close to the seat back 600, a movable ratchet 902 is machined on one side surface of the control rod 901, a fixed ratchet 903 is machined on the other side surface of the control rod 901, the fixed ratchet 903 is fixedly installed on the control rod 901, the movable ratchet 902 can be installed on the control rod 901 in a vertical rotating manner (for example, hinged connection), the lower surfaces of the movable ratchet 902 and the fixed ratchet 903 are both arc structures, the upper surfaces thereof are both planar structures (horizontal arrangement), and a reset spring 906 is arranged between the upper surface of the movable ratchet 902 and the control rod 901; the top of the transmission rack 402 is connected with an annular cylinder 404 through a connecting rod 406, the annular cylinder 404 is located in the handrail fixing cylinder 702, a sliding groove 7021 for the connecting rod 406 to pass through and move up and down is formed in the side wall of the handrail fixing cylinder 702, the trunk of the control rod 901 is sleeved inside the annular cylinder 404, and a fixing tooth 405 matched with the movable ratchet 902 and the fixed ratchet 903 is formed in the inner wall of the annular cylinder 404.

The transmission rack 402 can be locked by matching the movable ratchet 902 and the fixed ratchet 903 on the locking reset mechanism 900 with the fixed teeth 405 on the transmission rack, so that the chair cushion 100 is prevented from descending in a normal state and in a lifting process of the chair cushion and when a user stands. Specifically, when a wheelchair user uses the wheelchair normally, the transmission rack 402 is locked by the matching of the fixed ratchet 903 and the fixed teeth 405, and at the moment, the transmission rack 402 can not move upwards or downwards; when the user needs to stand, the downward movement of the transmission rack 402 is limited through the matching of the movable ratchet 902 and the fixed teeth 405, and at the moment, the transmission rack 402 can only move upwards, so that the user is ensured to stand up smoothly. When the wheelchair user sits down again after standing up, the locking reset mechanism 900 is unlocked to the transmission rack 402, and the transmission rack 402 and the seat cushion 100 can move downwards to be reset under the action of the gravity of the user. In this embodiment, the circular cylinder at the top of the transmission rack is located in the armrest fixing cylinder close to the chair back, so that the vertical movement of the transmission rack 402 can be guided by the armrest fixing cylinder 702, and the movement stability of the transmission rack is ensured.

Example 2

The structure of the standing-assist wheelchair of this embodiment is substantially the same as that of embodiment 1, and further, as shown in fig. 14, in this embodiment, the trunk of the control lever 901 is in a quadrangular prism shape, the surface (rising control surface) where the movable ratchet 902 is located and the surface (stationary control surface) where the fixed ratchet 903 is located are disposed opposite to each other, the other two surfaces of the control lever 901 are free surfaces 905, i.e., smooth surfaces, return springs 906 are correspondingly disposed between the middle portions of the movable ratchets 902 and the rising control surfaces, and the top of the trunk of the control lever 901 is provided with a direction adjustment handle perpendicular to the trunk, which is disposed outside the top cover 7022 of the armrest fixed cylinder 702. The bottom of the main trunk of the control rod 901 extends downwards to form a rotating cylindrical section 904, the bottom of the handrail fixing cylinder 702 is correspondingly provided with a rotating fixing column 504, and the rotating cylindrical section 904 can rotate in the rotating fixing column 504.

When the wheelchair user needs to stand, the direction adjusting handle of the control rod 901 is rotated to enable the movable ratchet 902 of the lifting control surface of the direction adjusting handle to correspond to the fixed teeth 405 (at the moment, the transmission rack 402 can only move upwards in a single direction relative to the rotating control rod 901), then the user leans back against the chair back 600, when the chair cushion 100 is lifted up and the chair back 600 is in a tilting state, the direction adjusting handle of the control rod 901 is rotated again to enable the fixed ratchet 903 on the static control surface of the direction adjusting handle to be matched with the fixed teeth 802 (at the moment, the transmission rack 402 is kept static), the user slowly restores to the vertical state, at the moment, the chair back 600 restores to the vertical state under the action of the restoring spring 304, the chair cushion 100 still. When the user sits down again, the user firstly sits on the inclined seat cushion 100, the direction adjustment handle of the control lever 901 is rotated to make the free surface 905 match with the fixed teeth 405, at this time, the transmission rack 402 loses the locking function and descends, and the inclined seat cushion 100 slowly becomes horizontal under the gravity of the human body. In the process that the seat cushion 100 is changed from the inclined state to the horizontal state (the buffer spring 103 is in the compressed state), the buffer spring 103 buffers the restoration of the seat cushion 100, that is, the restoring speed of the seat cushion 100 is slowed down by the elastic force of the buffer spring 103, so that the inconvenience brought to the user due to the fast restoring speed of the seat cushion 100 is prevented. When the wheelchair user needs to do simple movement, the direction adjustment handle of the control rod 901 can be rotated to enable the free surface of the direction adjustment handle to be matched with the fixing teeth 405, and the wheelchair user can do simple movement of sit-up and waist stretching through leaning back and upwards.

The auxiliary standing wheelchair comprises the following steps of: the direction of the control rod 901 is adjusted to a position that the lifting control surface of the control rod is matched with the fixed teeth 405, so that a person who is inconvenient to use can lean back with force, the chair back 600 inclines, the chair cushion 100 rises, after the height of the chair cushion rises to a certain height, the human body slowly moves upwards, the chair back 600 gradually returns to a vertical state, and the user stands up; when the user returns to the seat, the direction adjustment handle of the control lever 901 is rotated until the free surface thereof corresponds to the fixed teeth 802, and the seat cushion 100 is slowly restored to the original state under the action of the user's own gravity.

Example 3

The structure of the standing-assisting wheelchair of this embodiment is substantially the same as that of embodiment 2, and further, as shown in fig. 4 and 5, a first fixed cylinder 502 and a second fixed cylinder 503 which are concentrically arranged are fixed on a rear wheel mounting rod 501 in this embodiment, both ends of the fixed rod connecting rod 302 are rotatably mounted in the second fixed cylinder 503, and both ends of the angle adjusting sleeve 200 are correspondingly mounted between the first fixed cylinder 502 and the second fixed cylinder 503. Specifically, the outer sides of the two chair back fixing rods 301 on the fixing rod connecting rods 302 are provided with first stoppers 303, the inner wall of the gear 401 is provided with second stoppers 403 matched with the first stoppers 303, the gear 401 is mounted outside the first fixing barrel 502, and the first fixing barrel 502 is provided with an arc groove for the second stoppers 403 to pass through and rotate. When the wheelchair user leans back, the chair back fixing rod 301 and the fixing rod connecting rod 302 are pushed to rotate, the second stopper 403 is pushed through the first stopper 303 on the fixing rod connecting rod 302, and therefore the driving gear 401 rotates, and the driving rack 402 is driven to move upwards.

Furthermore, the first fixed cylinder 502 is processed into a step-type structure consisting of a first cylinder section 5021 and a second cylinder section 5022, the outer diameter of the first cylinder section 5021 is larger than the outer diameter of the second cylinder section 5022 and the inner diameter of the gear 401, the gear 401 is sleeved outside the second cylinder section 5022, a screw hole 505 is formed in the second cylinder section 5022, and the gear 401 is axially limited by a bolt in the screw hole 505 and the first cylinder section 5021.

With reference to fig. 8 and 9, the two ends of the angle adjusting sleeve 200 are both provided with the locking members 202, which can rotate around the second fixing cylinder 503 as the central axis, and then are locked and fixed by the locking members 202, so that the rotation amplitude of the chair back fixing rod 301 can be adjusted conveniently to meet the standing requirements of different users. Specifically, the two ends of the angle adjusting sleeve 200 are both processed with the clamping grooves 201 distributed along the circumferential direction thereof, the rear wheel mounting rod 501 is provided with the locking piece 202 matched with the clamping grooves 201, the locking piece 202 comprises a limiting ball 2021, a spring 2022, a spring stopper 2023 and a limiting pin 2024, the rear wheel mounting rod 501 is processed with a through hole 506 distributed along the transverse direction, one end of the limiting pin 2024 penetrates through one side of the through hole 506 and is fixedly connected (connected by a thread) with the limiting ball 2021, the diameter of the limiting ball 2021 is larger than the inner diameter of the through hole 506, and the other end of the limiting pin 2024 penetrates through the other side of the through hole 506 and is in clamping fit with the clamping grooves 201. The middle of the limit pin 2024 is provided with a spring stopper 2023, a spring 2022 is arranged between the limit ball 2021 and the spring stopper 2023, one end of the spring 2022 is fixedly connected with the spring stopper 2023, and the spring 2022 and the spring stopper 2023 are both positioned inside the through hole 506 of the rear wheel mounting rod 501 (the diameter of the two side edges of the through hole is equivalent to the diameter of the limit pin 2024, and the diameter of the spring stopper 2023 is equivalent to the diameter of the through hole, so that the spring stopper 2023 can move therein and cannot pass through the through hole 506). Under normal operating condition, one end of the limit pin 2024 is engaged with the slot 201.

Because different wheelchair users are different to the most suitable angle that back of the chair dead lever 301 is rotatory, before the user uses, can outwards stimulate spacing ball 2021, make spacing pin 2024 and draw-in groove 201 break away from the cooperation, angle adjustment sleeve 200 rotates to the rotation angle of adjustable back of the chair dead lever 301 makes locking piece 202 restore after adjusting, and spacing pin 2024 is buckled with draw-in groove 201 again and is realized angle adjustment sleeve 200's fixed. When the limit pin 2024 is engaged with the engaging slot 201, the spring 2022 is in an original length or a compressed state (the original length of the spring 2022 is equal to or greater than the length of the through hole), the spring is further compressed when the limit ball 2021 is pulled outwards, and after the angle adjustment sleeve adjusts the angle, the limit ball 2021 is released, and the limit pin 2024 can automatically reset under the elastic action of the spring 2022 to be engaged with the engaging slot 201 again.

Claims (10)

1. The utility model provides a stand supplementary wheelchair, includes frame, wheel, chair cushion (100) and back of the chair (600), the frame include back of the chair dead lever (301), dead lever connecting rod (302), chair cushion dead lever (800), handrail frame (700) and wheel mounting frame (500), wherein back of the chair dead lever (301) fixed mounting in the both ends of dead lever connecting rod (302), handrail frame (700) fixed mounting is on chair cushion dead lever (800), and chair cushion dead lever (800) are fixed continuous with wheel mounting frame (500), its characterized in that: the novel wheelchair is characterized by further comprising a transmission mechanism, wherein the transmission mechanism comprises a gear (401) and a transmission rack (402), the gear (401) is installed on the fixed rod connecting rod (302), two ends of the fixed rod connecting rod (302) are rotatably installed on the rear wheel installation rod (501) of the wheel installation rack (500), and the transmission rack (402) is fixedly connected with the rear end of the seat cushion (100) and meshed with the gear (401).

2. A standing assistance wheelchair as claimed in claim 1, wherein: the two sides of the chair cushion (100) are supported and installed on the chair cushion fixing rod (800) through a row of supporting hinges (102), and the length of the supporting hinges (102) is gradually shortened along the direction far away from the chair back (600).

3. A standing assistance wheelchair as claimed in claim 1, wherein: the locking reset mechanism comprises a control rod (901), two different side faces of the control rod (901) are respectively provided with a movable ratchet (902) and a fixed ratchet (903), the fixed ratchet (903) is fixedly installed on the control rod (901), the movable ratchet (902) can be installed on the control rod (901) in a vertically rotating mode, a transmission rack (402) is correspondingly provided with a fixed tooth (405) matched with the movable ratchet (902) and the fixed ratchet (903), downward movement of the transmission rack (402) is limited through matching of the movable ratchet (902) and the fixed tooth (405), and upward and downward movement of the transmission rack (402) is limited through matching of the fixed ratchet (903) and the fixed tooth (405).

4. A standing assistance wheelchair as claimed in claim 3, wherein: the lower surfaces of the movable ratchet (902) and the fixed ratchet (903) are both arc-shaped structures, the upper surfaces of the movable ratchet and the fixed ratchet are both planar structures, and a return spring (906) is arranged between the upper surface of the movable ratchet (902) and the control rod (901).

5. A standing assistance wheelchair as claimed in claim 3, wherein: the top of the transmission rack (402) is connected with an annular cylinder (404) through a connecting rod (406), the annular cylinder (404) is positioned in an armrest fixing cylinder (702) close to the chair back (600), and a sliding groove (7021) for the connecting rod (406) to pass through and move up and down is formed in the side wall of the armrest fixing cylinder (702); the control rod (901) is rotatably arranged in the handrail fixing cylinder (702) and penetrates through the annular cylinder (404), and the fixing teeth (405) are arranged on the inner wall of the annular cylinder (404).

6. A standing assist wheelchair as claimed in any one of claims 1 to 5, wherein: the chair back fixing rod mechanism is characterized in that the fixing rod connecting rod (302) is installed in the angle adjusting sleeve (200), a limiting groove for the chair back fixing rod (301) to penetrate out is processed on the angle adjusting sleeve (200), and a first reducing spring (304) is arranged between the chair back fixing rod (301) and the angle adjusting sleeve (200).

7. A standing assistance wheelchair as claimed in claim 6, wherein: a first fixed cylinder (502) and a second fixed cylinder (503) which are concentrically arranged are fixed on the rear wheel mounting rod (501), two ends of the fixed rod connecting rod (302) are rotatably arranged in the second fixed cylinder (503), and two ends of the angle adjusting sleeve (200) are correspondingly arranged between the first fixed cylinder (502) and the second fixed cylinder (503); gear (401) are installed in the outside of first fixed cylinder (502), and the outside that lies in two back of the chair dead levers (301) on dead lever connecting rod (302) all is provided with first dog (303), and gear (401) inner wall is provided with second dog (403) with first dog (303) matched with, and processing has on first fixed cylinder (502) to supply second dog (403) to pass and pivoted circular arc groove.

8. A standing assistance wheelchair as claimed in claim 7, wherein: first fixed section of thick bamboo (502) process for the notch cuttype structure of compriseing first section of thick bamboo (5021) and second section of thick bamboo (5022), the external diameter of first section of thick bamboo (5021) is greater than the external diameter of second section of thick bamboo (5022) and the internal diameter of gear (401), gear (401) suit promptly is outside in second section of thick bamboo (5022), and is equipped with screw (505) on second section of thick bamboo (5022), installs limit bolt in screw (505).

9. A standing assistance wheelchair as claimed in claim 6, wherein: both ends of angle adjusting sleeve (200) all process draw-in groove (201) that distribute along its circumference, install on rear wheel installation pole (501) with draw-in groove (201) matched with lock piece (202), lock the location through the cooperation of lock piece (202) and draw-in groove (201) angle adjusting sleeve (200).

10. A standing assistance wheelchair as claimed in claim 9, wherein: the locking piece (202) comprises a limiting ball (2021), a spring (2022), a spring stopper (2023) and a limiting pin (2024), a through hole (506) which is distributed along the transverse direction is processed on the rear wheel mounting rod (501), one end of the limiting pin (2024) penetrates through the through hole (506) to be fixedly connected with the limiting ball (2021), the other end of the limiting pin (2024) can be matched with the clamping groove (201) in a clamping manner, the spring stopper (2023) is arranged in the middle of the limiting pin (2024), the spring (2022) is arranged between the limiting ball (2021) and the spring stopper (2023), and the spring (2022) and the spring stopper (2023) are both located inside the through hole (506) of the rear wheel mounting rod (501).

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