CN217525616U

CN217525616U - Posture-adjustable seat and wheelchair

Info

Publication number: CN217525616U
Application number: CN202221129220.0U
Authority: CN
Inventors: 王尔琪
Original assignee: Changzhou Zhongjin Medical Devices Co ltd
Current assignee: Changzhou Zhongjin Medical Devices Co ltd
Priority date: 2022-05-11
Filing date: 2022-05-11
Publication date: 2022-10-04
Anticipated expiration: 2032-05-11

Abstract

The utility model discloses a seat with adjustable posture, it includes the seat support, the cushion bracket component, the cushion, the back bracket component, the back, cushion electric putter and back electric promotion push rod, every cushion bracket component is including connecting the seat frame joint on the cushion support, rotationally locate first seat pipe and second seat pipe on the seat frame joint and rotate and locate the multiple cell between first seat pipe and the second seat pipe, fixedly connected with stand the stay tube between two first seat pipes, the cushion is located on the second seat pipe, every back support assembly is including all articulating handrail connecting rod and the bar on the multiple cell, and articulate the handrail pipe between handrail connecting rod and bar, the back is located on the bar, back electric putter articulates between articulated and the reinforcing tube of back stay tube, the conversion under standing-sitting-lying three kinds of states has been realized, user's demand has been satisfied, therefore, the commonality is strong, and easy operation, convenient. The utility model also discloses a wheelchair with the adjustable seat of this posture.

Description

Posture-adjustable seat and wheelchair

Technical Field

The utility model relates to a wheelchair technical field especially relates to a seat and wheelchair with adjustable posture.

Background

The wheelchair is more and more favored by people with inconvenient legs and feet as a moving travel tool. In order for a user to sit on a wheelchair with their back resting against the back and both hands resting on the armrests, it is often necessary to adjust the seat cushion and back of the wheelchair to obtain the best seating experience. The adjusting structure on the traditional wheelchair is usually complex, manual adjustment is needed, time and labor are wasted, and the operation is very inconvenient. Moreover, the three postures of sitting, standing and lying can not be switched, and different use requirements of users are difficult to meet.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a posture-adjustable chair that facilitates the user to adjust the posture;

there is also a need to provide a wheelchair with such a posture adjustable seat.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a seat with adjustable posture, includes seat support, two relative cushion bracket component, cushion, two relative back bracket component, back, cushion electric putter and the electronic push rod that sets up of back that set up, every the cushion bracket component is including connecting seat frame joint on the cushion support, rotationally locate first seat pipe and second seat pipe and rotation on the seat frame joint are located first seat pipe with many boards between the second seat pipe, two fixedly connected with stand the stay tube between the first seat pipe, cushion electric putter articulates stand the stay tube with between the seat support, the cushion is located on the second seat pipe, every back supporting component including all articulate in handrail connecting rod and bar on the many boards, and articulate in handrail tube between handrail connecting rod and the bar, the back is located on the bar, back electric putter's one end with fix two back stay tube between the many boards is articulated, back electric putter's the other end with fix two the enhancement pipe between the bar is articulated.

Further, two fixed return bend of fixedly connected with between the handrail connecting rod, the one end fixedly connected with of handrail pipe rotates the cover, it rotationally overlaps and establishes to rotate the cover fixed return bend's outside.

Furthermore, one end of the cushion electric push rod is hinged with the seat support, and the extending end of the cushion electric push rod is hinged with the standing support tube.

Further, install the fixed pipe of handrail on the handrail pipe, fixed mounting has the handrail on the fixed pipe of handrail, the handrail pipe with the fixed pipe of handrail all bends the setting, the handrail pipe includes first handrail pipe and second handrail pipe, the fixed pipe of handrail includes the fixed pipe of first fixed pipe and second, the one end of second handrail pipe with the fixed pipe fixed connection of second, the one end of first fixed pipe with first handrail pipe fixed connection.

Furthermore, the upper end of the handrail rod is bent to form a handrail holding part.

A wheelchair comprising a posture-adjustable seat as claimed in any preceding claim.

Further, the wheelchair further comprises a lifting base, the seat support is of a U-shaped structure, the seat support is connected with a plurality of base pipes, a bearing plate is fixedly mounted on each base pipe, and the bearing plate is connected with the lifting base.

Further, the lifting base comprises a framework and a supporting assembly, the supporting assembly comprises a lifting support and a roller, the lifting support is connected to the framework, and the roller is rotatably installed on the lifting support.

The utility model has the advantages that: the utility model provides a seat or wheelchair with adjustable posture, user can adjust the angle of cushion and back, and the user not only can stand and sit down two kinds of postures between the conversion, still can sit down and lie down two kinds of postures between the conversion, can satisfy different users' user demand, and the commonality is strong, and easy operation, convenient.

Drawings

The present invention will be further explained with reference to the drawings and examples.

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

FIG. 2 is a front elevational view of the wheelchair of FIG. 1;

FIG. 3 is a perspective view of the lifting base of the wheelchair of FIG. 1;

FIG. 4 is a perspective view of the frame of the lift base of FIG. 3;

FIG. 5 is a perspective view of a support assembly in the lift base of FIG. 3;

FIG. 6 is a perspective view from another perspective of the support assembly shown in FIG. 5;

FIG. 7 is a perspective view of the anchor in the support assembly shown in FIG. 5;

FIG. 8 is a perspective view of the movable member of the support assembly of FIG. 5;

FIG. 9 is a perspective view of the adjustable position seat of the wheelchair of FIG. 1;

FIG. 10 is a perspective view of an alternative perspective of the adjustable position seat shown in FIG. 9;

FIG. 11 is a perspective view of the adjustable seat shown in FIG. 9 from a further perspective (with the seat cushion, backrest and leg rest omitted);

FIG. 12 is a schematic view of a seat cushion bracket assembly of the adjustable position seat of FIG. 11;

FIG. 13 is a schematic view of a back bracket assembly of the posture adjustable chair of FIG. 11.

The names and the numbers of the parts in the figure are respectively as follows:

bottom frame 111 of lifting base 10 framework 11

To the U-shaped frame 112 fixing the

guide rod

113 and 114

Backing plate 115 support rod 116 support assembly 12

Guide sleeve 1221 of roller electric push rod 121 lifting support 122

Connecting block 1222 roller 123 turning structure 124

Mount 1241 first mount 12411 second mount 12412

First through-hole 12413 recessed groove 12414 through-hole 12415

Mounting hole 12416 for moving part 1242 the first movable plate 12421

The second flap 12422 is connected to the aperture 12424 by the second through aperture 12423

Dodge hole 12425 steering motor 1243 roller 1244

Connecting plate 12441 drive motor 1245 rotating assembly 14

Driving gear 141 driven gear 142 rotating electric machine 143

Seat support 21 of speed reducer 144 posture-adjustable seat 20

Base tube 211 carrier plate 212 cushion bracket assembly 22

Seat frame joint 221 first seat tube 222 second seat tube 223

Multi-position plate 224 standing support tube 225 cushion 23

Arm rest lever 242 of arm rest link 241 of backrest support assembly 24

Armrest gripping part 2421, armrest tube 243, first armrest tube 2431

Second armrest tube 2432 rotates sleeve 2433 back support tube 244

Elbow 246 handrail fixing pipe 247 fixed by reinforcing pipe 245

First 2471 and second 2472 fixed tubes 2472 armrest 248

Backrest 25 cushion electric push rod 26 backrest electric push rod 27

Rotating shaft 28, rotating disc 29 and pedal support 201

Foot pedal elbow 2011 foot pedal connecting pipe 2012 leg mop pipe 2013

Intubation 2014 leg guard 2015 post 2016

Pedal cylinder 202 pedal 203 pedal fixing pipe 2031

Slide 2032 auxiliary wheel 204

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

Referring to fig. 1 and 2, the present invention provides a wheelchair, which includes a lifting base 10 and a posture-adjustable seat 20, wherein the posture-adjustable seat 20 is installed on the lifting base 10, when in use, a user sits on the posture-adjustable seat 20, the lifting base 10 drives the posture-adjustable seat 20 to move, and meanwhile, the posture-adjustable seat 20 can be lifted under the effect of the lifting base 10, so as to meet the use requirements of the user.

Specifically, referring to fig. 3, the lifting base 10 includes a frame 11, four support assemblies 12, four seat lifting cylinders 13 and a rotating assembly 14, the seat lifting cylinders 13 are installed in the middle of the frame 11, the four support assemblies 12 are respectively installed around the frame 11, each support assembly 12 includes a roller electric push rod 121 fixedly installed on the frame 11, a lifting bracket 122 connected to an extending end of the roller electric push rod 121, and a roller 123 rotatably installed on the lifting bracket 122, the rotating assembly 14 includes a driving gear 141 and a driven gear 142 rotatably installed on the extending end of the seat lifting cylinder 13, and a rotating motor 143 for driving the driving gear 141 to rotate, and the posture-adjustable seat 20 is fixedly connected to the driven gear 142.

When the user needs to move forward on a slope, the user can independently control the lifting of the roller electric push rod 121 to independently control the lifting of the corresponding roller 123, so that the posture-adjustable seat 20 is always in a balanced state, the user can be effectively prevented from falling down due to the inclination of the wheelchair, and the wheelchair is safe and reliable to use. For example, when the user encounters a front-back slope, the heights of the two rear rollers 123 can be adjusted to be lower than those of the two front rollers 123 by the roller electric push rod 121; when the user encounters a left-right slope, the heights of the two rollers 123 on the right side can be adjusted to be lower than those of the two rollers 123 on the left side through the roller electric push rod 121.

In addition, when the wheelchair is limited by the spatial size during use and cannot be turned as a whole by controlling the turning of the wheels 123, the user can start the rotating motor 143 to drive the posture-adjustable seat 20 to turn under the cooperation of the driving gear 141 and the driven gear 142, thereby achieving the turning function for the user. Simultaneously, the height that the user was located can be adjusted in seat lift cylinder 13's flexible action to satisfy the user demand of different occasions, and then promoted and used experience.

Referring to fig. 4, in the present embodiment, the frame 11 includes a bottom frame 111 and four inverted U-shaped frames 112 vertically connected to the bottom frame 111, two inverted U-shaped frames 112 are disposed on one side of the bottom frame 111, another two inverted U-shaped frames 112 are disposed on the other side of the bottom frame 111, a fixing plate 113 is fixedly connected between the two inverted U-shaped frames 112 located on the same side of the bottom frame 111, a guide rod 114 is vertically installed on the fixing plate 113, a fixed end of the roller electric push rod 121 is fixedly connected to the bottom frame 111, one end of the lifting bracket 122 is fixedly connected to a guide sleeve 1221, and the guide sleeve 1221 is slidably sleeved outside the guide rod 114. When the roller electric push rod 121 is used, the lifting bracket 122 can be driven to lift when the roller electric push rod 121 performs lifting motion, so that the guide sleeve 1221 slides along the guide rod 114, the guide rod 114 limits the guide sleeve 1221, and stable lifting of the roller 123 is ensured.

In addition, two fixing plates 113 are fixedly connected between the two inverted U-shaped frames 112 located on the same side of the bottom frame 111, and two guide rods 114 are fixedly connected between the two fixing plates 113. Through setting up two fixed plates 113 about, strengthened the structural strength between two inverted-U-shaped frame 112 of homonymy, avoided inverted-U-shaped frame 112 to take place to warp easily.

A support plate 115 is fixedly installed in the middle of the bottom frame 111, the cylinder body of the seat lifting cylinder 13 is fixedly installed on the support plate 115, and a support rod 116 is fixedly connected between the two inverted U-shaped frames 112 located at the two opposite sides of the seat lifting cylinder 13. On the one hand, the bracing piece 116 has strengthened the structural strength of two inverted-U-shaped frame 112, and on the other hand, bracing piece 116 can play the guard action to seat lift cylinder 13, has prevented that seat lift cylinder 13 from colliding with other article, has effectively guaranteed seat lift cylinder 13's normal work.

Referring to fig. 3 again, in the present embodiment, the outer diameter of the driving gear 141 is smaller than that of the driven gear 142, so as to realize the deceleration rotation.

In addition, the rotating assembly 14 further includes a speed reducer 144, the speed reducer 144 is fixedly installed at the extending end of the seat lifting cylinder 13, the power input end of the speed reducer 144 is fixedly connected with the output shaft of the rotating motor 143, the power output end of the speed reducer 144 is fixedly connected with the driving gear 141, and the speed reducer 144 is additionally arranged, so that further speed reduction rotation is realized, and the accurate control of the rotation angle of the posture-adjustable seat 20 by the user is facilitated. In other embodiments, not shown, the speed reducer 144 may be omitted, in which case, the output shaft of the rotating motor 143 is fixedly connected to the driving gear 141, and when in use, the rotating motor 143 directly drives the driving gear 141 to rotate.

Referring to fig. 5-8, in the present embodiment, each support assembly 12 further includes a steering structure 124, and the steering structure 124 is used for controlling the steering of the roller 123. The steering structure 124 includes a fixed part 1241, a movable part 1242 and a steering motor 1243, the fixed part 1241 and the movable part 1242 are both U-shaped structures, the fixed part 1241 is fixedly connected with the lifting bracket 122, the fixed part 1241 includes a first fixed plate 12411 and a second fixed plate 12412 which are oppositely disposed, the movable part 1242 includes a first movable plate 12421 and a second movable plate 12422 which are oppositely disposed, the first movable plate 12421 is clamped in a space formed by the first fixed plate 12411 and the second fixed plate 12412, the second fixed plate 12412 is clamped in a space formed by the first movable plate 12421 and the second movable plate 12422, a body of the steering motor 1243 sequentially passes through the first fixed plate 12411 and the first movable plate 12421 from top to bottom and is fixedly connected with the second fixed plate 12, an output shaft of the steering motor 1243 is fixedly connected with the second movable plate 12422, the steering motor 1242 is rotatable with respect to the body of the steering motor 1243, and the roller 123 is fixedly connected with the second movable plate 12422 through the roller bracket 4.

When a user needs to control the roller 123 to rotate, only the rotation motor 1243 needs to be started, so that the movable member 1242 and the roller 123 are driven to deflect relative to the fixed member 1241.

It is understood that in other embodiments not shown, the roller electric push rod 121 of the supporting component 12 can be omitted, and in this case, one end of the lifting bracket 122 is fixedly connected to the framework 11.

Referring to fig. 7, in the present embodiment, a first through hole 12413 is formed on the first fixing plate 12411, a recessed slot 12414 is formed on the upper end surface of the second fixing plate 12412 corresponding to the first through hole 12413, a through hole 12415 is formed on the bottom wall of the recessed slot 12414, the bottom of the body of the steering motor 1243 is fixedly accommodated in the recessed slot 12414 after passing through the first through hole 12413 downward, and the output shaft of the steering motor 1243 is fixedly connected to the second movable plate 12422 after passing through the through hole 12415.

Further, referring to fig. 8, the first movable plate 12421 is provided with a second through hole 12423, the second movable plate 12422 is provided with a connecting hole 12424, the first movable plate 12421 is rotatably sleeved outside the body of the steering motor 1243 through the second through hole 12423, and an output shaft of the steering motor 1243 is fixedly connected to the connecting hole 12424.

In addition, referring to fig. 7 and 8 again, a plurality of mounting holes 12416 are formed on the groove bottom wall of the recessed groove 12414 around the through hole 12415, relief holes 12425 are formed on the second movable plate 12422 corresponding to the mounting holes 12416, fasteners (not shown) such as bolts or screws are installed at the bottom of the second fixing plate 12412, and the upper ends of the fasteners pass through the mounting holes 12416 and then are in threaded connection with the second fixing plate 12412. During assembly, the fastener passes avoidance hole 12425 from bottom to top, and avoidance hole 12425 can avoid the installation space of fastener to convenience of customers installation operation.

In this embodiment, the cross section of the connection hole 12424 is regular hexagon, and the outer portion of the output shaft of the steering motor 1243 is fixedly sleeved with a regular hexagonal prism (not shown in the figure), the regular hexagonal prism is matched with the connection hole 12424, and the regular hexagonal prism is fixedly installed in the connection hole 12424. Because the regular hexagonal prism is of a non-cylindrical structure, when the regular hexagonal prism is matched and connected with the connecting hole 12424, the relative rotation between the output shaft of the steering motor 1243 and the movable piece 1242 can be effectively avoided, and the stable function of the steering motor 1243 is ensured. It is understood that the cross-sectional shape of the connecting hole 12424 may also be a polygonal structure such as a rectangle or a non-circular structure such as an ellipse.

In addition, referring to fig. 6 again, in order to realize the self-driving function of the roller 123, a driving motor 1245 is fixedly mounted at one end of the roller bracket 1244, and an output shaft of the driving motor 1245 is fixedly connected to a hub of the roller 123. When the wheelchair is used, the driving motor 1245 is started, so that the roller 123 can be driven to automatically move, and the intellectualization of the wheelchair is realized.

In this embodiment, each supporting component 12 has two lifting brackets 122, the two lifting brackets 122 are respectively and fixedly connected to two opposite sides of the fixing member 1241, a connecting block 1222 is fixedly connected between the two lifting brackets 122, and an extending end of the roller electric push rod 121 is fixedly connected to the connecting block 1222. By providing two lifting brackets 122, the connection strength between the lifting brackets 122 and the fixing member 1241 is improved.

In addition, the number of the roller supports 1244 is two, the two roller supports 1244 are respectively and fixedly connected to two opposite sides of the movable member 1242, a connecting plate 12441 is fixedly connected between the two roller supports 1244, and the body of the driving motor 1245 is fixedly mounted on the connecting plate 12441.

Referring to fig. 9-13, the posture-adjustable seat 20 includes a seat support 21, two seat cushion support assemblies 22, a seat cushion 23, two backrest support assemblies 24, a backrest 25, a seat cushion electric push rod 26 and a backrest electric push rod 27, the seat support 21 is mounted on the lifting base 10, specifically, the seat support 21 is fixedly connected to the driven gear 142, each seat cushion support assembly 22 includes a seat frame joint 221 fixedly connected to the seat support 21, a first seat tube 222 and a second seat tube 223 rotatably mounted on the seat frame joint 221, and a multi-position plate 224 rotatably mounted between the first seat tube 222 and the second seat tube 223, specifically, one end of the first seat tube 222 is hinged to the multi-position plate 224, one end of the second seat tube 223 is hinged to the multi-position plate 224, a standing support tube 225 is fixedly connected between the two first seat tubes 222, the seat cushion electric push rod 26 is hinged between the standing support tube 225 and the seat support frame 21, the seat cushion 23 is mounted on the second seat tube 223, each backrest support assembly 24 includes an armrest link 241 and an armrest rod 241, a seat cushion rod 241 hinged to the armrest rod 242, and a backrest reinforcing rod 242 hinged to the armrest rod 242.

When a user controls the extending end of the electric push rod 26 of the cushion to do telescopic movement, the electric push rod can drive the two cushion bracket assemblies 22 and the cushion 23 to deflect relative to the seat bracket 21, so that the cushion 23 is inclined forwards or backwards, the sitting posture of the user is changed, and the user can be switched between a standing posture and a sitting posture; when the user controls the extending end of the backrest electric push rod 27 to do telescopic movement, the user can drive the two backrest bracket assemblies 24 and the backrest 25 to tilt forwards or backwards, so that the lying degree of the back of the user is changed, and the user can change between sitting and lying postures. Above, through the regulation to cushion 23 and back 25, can satisfy different users' user demand, the commonality is strong, and easy operation, convenient.

Referring to fig. 10 again, in the present embodiment, a fixed bent pipe 246 is fixedly connected between the two armrest connecting rods 241, a rotating sleeve 2433 is fixedly connected to one end of the armrest pipe 243, and the rotating sleeve 2433 is rotatably sleeved outside the fixed bent pipe 246. Through setting up fixed return bend 246, strengthened structural strength on the one hand, prevented that back bracket component 24 from taking place to warp easily, on the other hand also plays the guard action to cushion electric putter 26, has avoided the foreign object to cause wearing and tearing or collision to cushion electric putter 26.

In this embodiment, the seat support 21 has a U-shaped structure, the seat support 21 is connected to a plurality of base tubes 211, the base tubes 211 are fixedly mounted with a carrier plate 212, and the posture-adjustable seat 20 is fixedly connected to the driven gear 142 of the elevating base 10 through the carrier plate 212. The base tube 211 improves the structural strength of the seat support 21, and ensures that the lifting base 10 can stably lift the posture-adjustable seat 20 through the seat support 21.

Further, one end of the cushion electric push rod 26 is hinged to the seat frame 21, and the extended end of the cushion electric push rod 26 is hinged to the standing support pipe 225.

In addition, referring to fig. 13 again, the handrail fixing tube 247 is installed on the handrail tube 243, the handrail 248 is fixedly installed on the handrail fixing tube 247, the handrail tube 243 and the handrail fixing tube 247 are both bent, the handrail tube 243 includes a first handrail tube 2431 and a second handrail tube 2432, the handrail fixing tube 247 includes a first fixing tube 2471 and a second fixing tube 2472, one end of the second handrail tube 2432 is fixedly connected with the second fixing tube 2472, and one end of the first fixing tube 2471 is fixedly connected with the first handrail tube 2431. When the handrail fixing device is used, two fixing connection points are arranged between the handrail pipe 243 and the handrail fixing pipe 247, so that the connection stability between the handrail pipe 243 and the handrail fixing pipe 247 is enhanced, and a good supporting effect is achieved on the handrail 248. In addition, the position of the armrest 248 can be automatically adjusted along with the posture of the backrest 25, so that the use by a user is facilitated, and the use experience is greatly improved.

In addition, referring to fig. 10 again, the upper end of the grab bar 242 is bent to form a grab handle part 2421, and the grab handle part 2421 is used for being grasped and pushed.

Referring to fig. 2 and 9 again, in the present embodiment, the posture-adjustable seat 20 further includes a rotating shaft 28, a rotating disc 29, a pedal bracket 201, two pedal cylinders 202 and two pedals 203, the rotating shaft 28 is rotatably mounted on the seat bracket 21, the two rotating discs 29 are respectively fixedly sleeved outside the rotating shaft 28, the pedal bracket 201 is fixedly mounted on the rotating disc 29, a cylinder body of the pedal cylinder 202 is fixedly mounted on the pedal bracket 201, the pedals 203 are fixedly mounted on an extending end of the pedal cylinder 202, two auxiliary wheels 204 are rotatably mounted at a bottom of the pedals 203, and the auxiliary wheels 204 are located at a front side of the rollers 123.

In the moving process of the wheelchair, when an obstacle exists on the road surface and blocks the wheelchair from moving, a user can control the rotating shaft 28 to rotate so as to drive the pedals 203 to rotate towards the front, then the extending end of the pedal cylinder 202 is controlled to extend outwards so as to drive the pedals 203 to move downwards, finally the auxiliary wheel 204 falls in front of the obstacle, and the two rollers 123 in front are lifted up under the support of the pedals 203, at the moment, the user controls the two rollers 123 in back to rotate so as to drive the wheelchair to move forwards. When the two front rollers 123 pass over the obstacle, the pedals 203 can be reset, and the two rear rollers 123 are driven by the driving force of the two front rollers 123 to pass over the obstacle. In order to improve the stability when crossing obstacles, the user can turn the front roller 123 down, thereby facilitating the two rear rollers 123 to cross the obstacles. The process can be completed without assistance of others, and the method is simple, convenient and fast to operate, saves manpower, and is safe and reliable.

In this embodiment, two ends of the rotating shaft 28 are respectively rotatably mounted on two seat frame joints 221, and a deflection motor (not shown) is mounted on one side of the seat frame joints 221, and is used for driving the rotating shaft 28 to rotate. In this embodiment, the deflection motor drives the rotation shaft 28 to rotate through a speed reduction device (e.g., a speed reducer) for speed reduction, thereby facilitating the user to precisely control the deflection angle of the pedals 203. It will be appreciated that in other embodiments, not shown, the output shaft of the yaw motor is fixedly connected to the shaft 28, and the shaft 28 is directly driven to rotate by the yaw motor.

The turntable 29 is roughly in a quarter fan-shaped structure, the pedal bracket 201 comprises two pedal elbows 2011 which are arranged oppositely and a plurality of pedal connecting pipes 2012 fixedly connected between the two pedal elbows 2011, the bending part at the upper end of the pedal elbow 2011 is attached to and fixedly connected with the outer arc surface of the turntable 29, and the cylinder body of the pedal cylinder 202 is fixedly connected with the pedal connecting pipes 2012. The bending part at the upper end of the pedal elbow 2011 is attached to the outer arc surface of the turntable 29, so that the combination area between the pedal elbow 2011 and the turntable 29 is increased, and the connection stability is improved. In the present embodiment, the pedal elbow 2011 and the turntable 29 are welded.

The pedal 203 is provided with a pedal fixing pipe 2031, one end of the pedal fixing pipe 2031 far away from the pedal 203 is fixedly connected with a sliding block 2032, and the sliding block 2032 is connected with the extending end of the pedal cylinder 202.

In an embodiment, not shown, the pedal bracket 201 has a guide rail fixedly mounted thereon, to which the slide 2032 is slidably connected. When the pedal cylinder 202 drives the sliding block 2032 to move, the sliding block 2032 slides along the guide rail, and the guide rail can guide and support the sliding block 2032, so that the pedal 203 is ensured to move stably.

In addition, referring to fig. 9 and 11 again, the pedal fixing tube 2031 is fixedly connected with a leg dragging tube 2013, the end of the leg dragging tube 2013 is vertically connected with an insertion tube 2014, the insertion tube 2014 is detachably connected with a leg protection frame 2015, the leg protection frame 2015 is in an arc plate-shaped structure, the leg protection frame 2015 is connected with an insertion column 2016, and the insertion column 2016 is inserted into the insertion tube 2014. When the leg protector is used, the lower leg of a user is folded in a space surrounded by the leg protector 2015 and the leg pulling tube 2013, and the lower leg is protected and fixed. Moreover, the installation and disassembly processes can be realized only by simple plugging and unplugging, and the operation is simple and convenient.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A posture adjustable seat is characterized in that: including seat support, two relative cushion bracket component, cushion, two relative back bracket component, back, cushion electric putter and the electronic push rod that promotes of back that set up, every cushion bracket component is including connecting seat frame joint on the cushion support, rotationally locate first seat pipe and second seat pipe on the seat frame joint and rotate and locate first seat pipe with many boards between the second seat pipe, two fixedly connected with stand the stay tube between the first seat pipe, cushion electric putter articulates stand the stay tube with between the seat support, the cushion is located on the second seat pipe, every back supporting component including all articulate in handrail connecting rod and bar on the many boards, and articulate in handrail pipe between handrail connecting rod and the bar, the back is located on the bar, back electric putter's one end with fix two back stay tube between the many boards is articulated, back electric putter's the other end with fix two enhancement pipe between the bar is articulated.

2. The adjustable posture seat of claim 1, wherein: two fixed return bend of fixedly connected with between the handrail connecting rod, the one end fixedly connected with of handrail pipe rotates the cover, it rotationally overlaps and establishes to rotate the cover fixed return bend's outside.

3. The adjustable position seat of claim 1, wherein: one end of the cushion electric push rod is hinged with the seat support, and the extending end of the cushion electric push rod is hinged with the standing support tube.

4. The adjustable posture seat of claim 1, wherein: install the fixed pipe of handrail on the handrail pipe, fixed mounting has the handrail on the fixed pipe of handrail, the handrail pipe with the fixed pipe of handrail all bends and sets up, the handrail pipe includes first handrail pipe and second handrail pipe, the fixed pipe of handrail includes the fixed pipe of first fixed pipe and second, the second handrail pipe one end with the fixed pipe fixed connection of second, the first fixed pipe one end with first handrail pipe fixed connection.

5. The adjustable posture seat of claim 1, wherein: the upper end of the handrail rod is bent to form a handrail holding part.

6. A wheelchair, characterized by: the wheelchair comprising a posture-adjustable seat as claimed in any one of claims 1 to 5.

7. The wheelchair of claim 6 wherein: the wheelchair further comprises a lifting base, the seat support is of a U-shaped structure, the seat support is connected with a plurality of base tubes, a bearing plate is fixedly mounted on each base tube, and the bearing plate is connected with the lifting base.

8. The wheelchair of claim 7 wherein: the lifting base comprises a framework and a supporting assembly, the supporting assembly comprises a lifting support and a roller, the lifting support is connected to the framework, and the roller is rotatably installed on the lifting support.