CN108904161B - A wheelchair - Google Patents

Abstract

The invention provides a wheelchair which comprises a chair seat, a backrest, a chassis support, a folding plate frame and an armrest device, wherein the top end of the folding support is pivoted to the rear side part of the chair seat, the top end of the folding support is connected with the bottom of the backrest, the bottom end of the folding support is connected with the chassis support, the top end of the folding plate frame is pivoted to the chair seat, the bottom end of the folding plate frame is pivoted to the chassis support, and the armrest device is connected to the chair seat in a foldable manner. The folding of the wheelchair is convenient, and the folded structure is compact, thereby being beneficial to reducing the occupied space.

Description

A wheelchair

Technical Field

The present invention relates to the technical field of wheelchairs, and in particular to a foldable wheelchair.

Background technique

Wheelchairs are important tools for rehabilitation. They are a means of transportation for people with physical disabilities and limited mobility, and can facilitate their physical exercise and participation in social activities. Currently, some wheelchairs have a folding structure so that they can be folded and placed when not in use. However, these wheelchairs are not convenient to fold, and the folded structure is still not compact enough.

Summary of the invention

Based on this, an object of the present invention is to provide a wheelchair which is convenient to fold and has a compact structure after folding, thereby helping to reduce occupied space.

The technical solution of the present invention is: a wheelchair, including a seat, a backrest, a chassis bracket, a folding bracket, a folding plate frame and an armrest device, the top end of the folding bracket is pivotally connected to the rear side of the seat, and the top end of the folding bracket is connected to the bottom of the backrest, the bottom end of the folding bracket is connected to the chassis bracket, the top end of the folding plate frame is pivotally connected to the seat, the bottom end of the folding plate frame is pivotally connected to the chassis bracket, and the armrest device is foldably connected to the seat.

Optionally, the folding bracket includes an upper folding support rod and a lower folding support rod, the top end of the upper folding support rod is pivoted to the rear side of the seat, and the top end of the upper folding support rod is fixedly connected to the bottom of the backrest, the bottom end of the upper folding support rod is pivoted to the top end of the lower folding support rod, and the bottom end of the lower folding support rod is fixedly supported on the chassis bracket.

Optionally, the lower folding support rod includes a main rod body, a first support plate and a second support plate, the first support plate and the second support plate are both arranged at the top end of the main rod body, and the first support plate and the second support plate are arranged parallel to each other, and an installation groove is formed between the first support plate and the second support plate, and the upper folding support rod extends into the installation groove and is pivotally connected to the lower folding support rod.

Optionally, a latch device is installed on the first support plate, and the latch device includes a latch body. The first support plate is provided with a through hole, and the upper folding support rod is provided with a snap-fitting recess. The latch body can be telescopically inserted into the through hole and the snap-fitting recess.

Optionally, the upper folding support rod is provided with a card plate arranged along its extension direction, a card column is connected between the first support plate and the second support plate, and the card column is located beside the main rod body, the card column is perpendicular to the plane where the card plate is located, and the lower folding support rod or the card column is connected with a buckle, and the buckle is buckled with the card plate so that the bottom end of the card plate is pressed against the card column.

Optionally, the fastening component includes a movable handle, a pressure block, a connecting rod and a spring, the pressure block is slidably connected to the connecting rod, the connecting rod is connected to the clamping column, and the connecting rod can rotate around the clamping column with the clamping column as a rotating axis, and the spring is connected between the pressure block and the clamping column; the movable handle is connected to the top end of the connecting rod.

Optionally, the number of the clamping plates is two, the two clamping plates are both disposed in the mounting groove and are parallel to each other, and an accommodating groove for accommodating the connecting rod is formed between the two clamping plates.

Furthermore, a bottom end of the clamping plate is provided with a clamping groove matching the outer peripheral surface of the clamping column.

Optionally, the chassis bracket includes a longitudinal beam and a mounting reinforcement beam, wherein the mounting reinforcement beam is arranged above the longitudinal beam, the bottom end of the lower folding support rod is fixedly supported on the longitudinal beam, and the middle part of the lower folding support rod is fixedly supported on the mounting reinforcement beam.

Optionally, the armrest device includes a folding locking mechanism, which is arranged on the rear side of the seat, and the folding locking mechanism includes a shell, the top end of the upper folding support rod is pivotally connected to the shell, and the bottom of the backrest is fixedly connected to the shell.

Optionally, the top end of the folding plate frame is pivotally connected to the front side of the seat, and the bottom end of the folding plate frame is pivotally connected to the chassis bracket.

Optionally, the chassis support includes a front beam, and the bottom end of the folding plate frame is pivotally connected to the front beam.

Optionally, the folding plate frame is provided with a positioning groove for installing the control panel.

Optionally, the chassis bracket includes a bottom frame and two support frames, the two support frames are respectively fixed on both sides of the bottom frame, the support frames extend along the front and rear directions of the bottom frame, and the support frames are provided with at least two wheel mounting positions, each of the wheel mounting positions is arranged along the extension direction of the support frame, and movable wheels are installed in the wheel mounting positions.

Optionally, the support frame includes an intermediate bracket, a front support beam and a rear support beam, the wheel mounting position is divided into a front wheel mounting position and a rear wheel mounting position, the front support beam and the rear support beam are respectively fixedly arranged on both sides of the intermediate bracket, and the front wheel mounting position is formed between the front support beam and the intermediate bracket, and the rear wheel mounting position is formed between the rear support beam and the intermediate bracket; the movable wheel is divided into a front movable wheel and a rear movable wheel, the front movable wheel is installed in the front wheel mounting position, and the front movable wheel is connected to the front support beam, and the rear movable wheel is installed in the rear wheel mounting position.

Optionally, the intermediate bracket is connected to a mounting reinforcement beam, the mounting reinforcement beam includes a rear extension portion, and the rear movable wheel is connected to the rear extension portion.

Optionally, the intermediate bracket includes a bottom beam and two side beams, the two side beams are respectively arranged at both ends of the bottom beam to form plug-in grooves for battery installation, and the installation reinforcement beam is connected to the two side beams.

Optionally, the bottom frame includes a front beam, a rear beam and at least two longitudinal beams, each of the longitudinal beams is respectively connected between the front beam and the rear beam, and the two support frames are respectively connected to two ends of the front beam.

Optionally, the rear beam is pivotally connected to a tail bracket, a tail wheel is installed at the end of the tail bracket, a transmission rod is arranged between the folding plate frame and the tail bracket, and both ends of the transmission rod are pivotally connected to the folding plate frame and the tail bracket respectively.

Optionally, the armrest device comprises a folding arm and an armrest body, the folding arm is rotatably and foldably connected to the seat, and the armrest body is pivotally connected to the top end of the folding arm.

Optionally, the seat is connected to a folding locking mechanism, and the folding arm is rotatably connected to the folding locking mechanism.

Optionally, the folding locking mechanism includes a shell, a gear, a linkage and a rocker arm, the folding arm is pivoted to the shell via a first pivot shaft, the gear is disposed on the first pivot shaft, the linkage is installed on the shell, and the linkage is provided with a tooth key that can mesh with the gear, the rocker arm is pivoted to the shell, and the rocker arm is connected to the linkage, and a torsion spring is installed at the pivot joint between the rocker arm and the shell.

Optionally, the linkage member includes an arc-shaped limiting member and a strip sliding block, the tooth key is arranged on the arc-shaped limiting member, the arc-shaped limiting member has a pivot end and a connecting end, the pivot end is pivoted to the shell member, the connecting end is connected to the first end of the strip sliding block, the shell member is provided with a sliding groove, the strip sliding block can be slidably installed in the sliding groove, and the second end of the strip sliding block is connected to the rocker arm.

Optionally, the rocker arm includes a main arm and a connecting arm, the connecting arm is arranged at one end of the main arm, and the connecting arm and the main arm form an angle, the connecting arm is provided with a sliding hole, and the second end of the strip slider is provided with a connecting shaft, and the connecting shaft is passed through the sliding hole.

Optionally, the shell has an installation cavity, and the shell is provided with a strip hole communicating with the installation cavity, the gear and the linkage are both installed in the installation cavity, the rocker arm extends from the strip hole, and the first pivot axis passes through the shell and is connected to the bottom end of the folding arm.

Optionally, the folding arm includes a first folding arm and a second folding arm, the bottom end of the first folding arm is connected to the shell via the first pivot axis, the bottom end of the second folding arm is pivoted to the shell via the second pivot axis, and the top end of the first folding arm and the top end of the second folding arm are respectively pivoted to the armrest body.

Optionally, the first folding arm and the second folding arm are arranged in parallel with each other, and the second folding arm is provided with a first groove extending along the length direction thereof, and the first folding arm can be movably accommodated in the first groove.

Optionally, a support is fixedly installed at the bottom of the armrest body, and the first folding arm and the second folding arm are respectively connected to the armrest body through the support.

Optionally, the support includes a connecting plate, a first pivot plate and a second pivot plate, the first pivot plate and the second pivot plate are arranged on the bottom surface of the connecting plate, the first folding arm is pivoted to the first pivot plate, and the second folding arm is pivoted to the second pivot plate.

Optionally, the second folding arm is closer to the rear end of the armrest body than the first folding arm, and the length of the second pivot plate is greater than the length of the first pivot plate.

Optionally, the first folding arm is provided with a second groove extending along the length direction thereof, and the second pivot plate is accommodated in the second groove.

Optionally, at least one row of mounting holes is provided at the bottom of the armrest body, and the support is provided with at least two through holes, and each of the through holes is connected to the corresponding mounting hole by a bolt.

Optionally, a cross section of the first folding arm and a cross section of the second folding arm are both half-waist-shaped, and the first folding arm and the second folding arm are arranged opposite to each other.

The implementation of the embodiments of the present invention has the following beneficial effects:

The wheelchair of the present invention comprises a seat, a backrest, a chassis bracket, a folding bracket, a folding plate frame and an armrest device, and the folding bracket and the folding plate frame are foldably connected between the seat and the chassis bracket through a pivot structure, the backrest is also connected to the folding bracket, and the armrest device is foldably connected above the seat; therefore, when the wheelchair is folded, the seat together with the backrest can be folded onto the chassis bracket through the action of the folding bracket and the folding plate frame, and the armrest device can also be folded onto the seat. Therefore, the folding of the wheelchair only requires a simple action to rotate and fold the folding bracket, the folding plate frame and the armrest device. This folding method is more convenient, and the folded structure is also more compact and neat, which is conducive to reducing the occupied space.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a first overall structural schematic diagram of the wheelchair described in this embodiment.

FIG. 2 is a second overall structural schematic diagram of the wheelchair described in this embodiment.

FIG. 3 is a side view of the wheelchair according to the present embodiment.

FIG. 4 is a schematic structural diagram of the wheelchair described in this embodiment after the storage box is removed.

FIG. 5 is a schematic diagram of the assembly structure between the chassis bracket and the lower folding support rod described in this embodiment.

FIG. 6 is a schematic diagram of the connection structure between the upper folding support rod and the lower folding support rod according to the present embodiment after the movable handle is removed.

FIG. 7 is a schematic structural diagram of the latch device according to the present embodiment.

FIG8 is a schematic diagram of the assembly structure between the seat, backrest, armrest device and folding bracket described in this embodiment.

FIG. 9 is a schematic structural diagram of the folding locking mechanism described in this embodiment.

FIG. 10 is a schematic diagram of the assembly structure between the folding arm and the armrest body described in this embodiment.

Description of reference numerals:

1. Seat, 2. Backrest, 3. Chassis bracket, 31. Bottom frame, 311. Front beam, 312. Rear beam, 313. Longitudinal beam, 32. Support frame, 321. Middle bracket, 3211. Bottom beam, 3212. Side beam, 3213. Insertion groove, 322. Front support beam, 3221. Shell cover, 323. Rear support beam, 324. Install reinforcement beam, 4. Folding bracket, 41. Upper folding support rod, 411. Card plate, 4111. Card angle, 42. Lower Folding support rod, 421, first support plate, 422, second support plate, 423, main rod body, 424, clamping column, 4241, sleeve pad, 5, folding plate frame, 6, armrest device, 61, folding arm, 611, first folding arm, 612, second folding arm, 62, armrest body, 621, mounting hole, 63, folding locking mechanism, 631, shell, 6311, main shell, 6312, surface shell, 632, gear, 633, linkage, 6331, arc Limiting member, 6331a, tooth key, 6331b, pivot end, 6331c, connecting end, 6332, strip slider, 6332a, connecting shaft, 634, rocker arm, 6341, main arm, 6342, connecting arm, 6342a, sliding hole, 635, first pivot shaft, 636, second pivot shaft, 64, support, 641, connecting plate, 6411, through hole, 642, first pivot plate, 643, second pivot plate, 7, latch device, 71, Latch body, 72, pull wire, 73, first spring, 74, installation sleeve, 75, stop sleeve, 8, buckle, 81, movable handle, 82, pressure block, 83, connecting rod, 84, second spring, 9, front moving wheel, 10, rear moving wheel, 11, footrest bracket, 111, foot pedal, 12, control panel, 13, storage box, 14, tail bracket, 141, tail wheel, 15, transmission rod, 16, control box, 17, battery, 18, drive motor.

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “top” and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Referring to Fig. 1 to Fig. 4, the present embodiment provides a wheelchair, which comprises a seat 1, a backrest 2, a chassis bracket 3, a folding bracket 4, a folding plate frame 5 and an armrest device 6. The top end of the folding bracket 4 is pivotally connected to the rear side of the seat 1, and the top end of the folding bracket 4 is connected to the bottom of the backrest 2, the bottom end of the folding bracket 4 is connected to the chassis bracket 3, the top end of the folding plate frame 5 is pivotally connected to the seat 1, the bottom end of the folding plate frame 5 is pivotally connected to the chassis bracket 3, and the armrest device 6 is foldably connected to the seat 1. Therefore, when the wheelchair is folded, the seat 1 together with the backrest 2 can be folded on the chassis bracket 3 through the folding action of the folding bracket 4 and the folding plate frame 5, and the armrest device 6 can also be folded on the seat 1. Therefore, the folding of the wheelchair only requires a simple action to rotate and fold the folding bracket 4, the folding plate frame 5 and the armrest device 6. This folding method is more convenient, and the folded structure is also more compact and neat, which is conducive to reducing the occupied space.

2 to 4, and referring to FIG. 6 and FIG. 7, the folding bracket 4 of the present embodiment includes an upper folding support rod 41 and a lower folding support rod 42, the top end of the upper folding support rod 41 is pivoted to the rear side of the seat 1, and the top end of the upper folding support rod 41 is fixedly connected to the bottom of the backrest 2, the bottom end of the upper folding support rod 41 is pivoted to the top end of the lower folding support rod 42, and the bottom end of the lower folding support rod 42 is fixedly supported on the chassis bracket 3; specifically, the lower folding support rod 42 includes a main rod body 423, a second folding support rod 424, and a second folding support rod 425. A first support plate 421 and a second support plate 422, the first support plate 421 and the second support plate 422 are both arranged at the top end of the main rod body 423, and the first support plate 421 and the second support plate 422 are arranged parallel to each other, and a mounting groove is formed between the first support plate 421 and the second support plate 422, and the upper folding support rod 41 extends into the mounting groove and is pivotally connected to the lower folding support rod 42; therefore, the upper folding support rod 41 can rotate relative to the lower folding support rod 42, thereby enabling the folding bracket 4 to achieve a folding function. The first support plate 421 is provided with a latch device 7, which includes a latch body 71, a pull wire 72, a first spring 73, a mounting sleeve 74 and a stop sleeve 75. The stop sleeve 75 is connected to one end of the mounting sleeve 74, and the diameter of the stop sleeve 75 is smaller than the diameter of the mounting sleeve 74. The latch body 71 is inserted into the stop sleeve and the mounting sleeve 74. The latch body 71 is provided with a step. The first spring 73 is provided in the mounting sleeve 74, and the two ends of the first spring 73 respectively abut against the above-mentioned step and the end of the stop sleeve 75. The tail end of the latch body 71 is connected to the pull wire 72, and the head of the latch body 71 extends from the other end of the mounting sleeve 74. The first support plate 421 is provided with a through hole, and the upper folding support rod 41 is provided with a snap-fitting recess. After the latch body 71 extends out from the mounting sleeve 74, it can be telescopically inserted into the through hole and the snap-fitting recess. Since the folding brackets 4 on both sides of the wheelchair are equipped with latch devices 7, a pull wire 72 can be shared between the two latch devices 7. Therefore, when the pull wire 72 is pulled, the latch bodies 71 on both sides are retracted from the corresponding through holes and the engaging recesses, and the upper folding support rod 41 can be rotated and folded relative to the lower folding support rod 42; and when the upper folding support rod 41 is unfolded relative to the lower folding support rod 42 until the through hole and the engaging recess are relatively aligned, the latch body 71 will extend into the through hole and the engaging recess under the action of the spring, thereby achieving relative fixation between the upper folding support rod 41 and the lower folding support rod 42.

Further, the upper folding support rod 41 is provided with a card plate 411 arranged along its extension direction, a card column 424 is connected between the first support plate 421 and the second support plate 422 at the top of the lower folding support rod 42, the card column 424 is located beside the main rod body 423, and the card column 424 is perpendicular to the plane where the card plate 411 is located, and the lower folding support rod 42 or the card column 424 is connected with a buckle 8, and the buckle 8 is buckled with the card plate 411 so that the bottom end of the card plate 411 is pressed against the card column 424. The buckle 8 of this embodiment includes a movable handle 81, a pressing block 82, a connecting rod 83 and a second spring 84, the pressing block 82 is slidably connected to the connecting rod 83, one end of the connecting rod 83 is connected to the card column 424, and the connecting rod 83 can rotate around the card column 424 with the card column 424 as a rotating axis, the second spring 84 is connected between the pressing block 82 and the card column 424, and the movable handle 81 is connected to the top of the connecting rod 83. Specifically: the bottom end of the card plate 411 is provided with a card groove that matches the outer peripheral surface of the card column 424, and the card column 424 is sleeved with a sleeve gasket 4241 that matches the card groove; the card column 424 can rotate around its own central axis, and the above-mentioned connecting rod 83 is fixedly inserted on the card column 424, and the connecting rod 83 is perpendicular to the card column 424; in addition, the top of the card plate 411 is provided with a card angle 4111, and the card angle 4111 is set as a chamfered corner; the above-mentioned card plates 411 are set as two, and the two card plates 411 are both arranged in the installation groove and parallel to each other, and a receiving groove for accommodating the connecting rod 83 is formed between the two card plates 411. Therefore, when the upper folding support rod 41 is unfolded relative to the lower folding support rod 42 and the relative fixation between the two is achieved through the pin device 7, the fastening member 8 can be fastened on the card plate 411 to press the bottom end of the card plate 411 against the card column 424, thereby achieving further fixation between the upper folding support rod 41 and the lower folding support rod 42, making the fixation of the two after unfolding more stable, thereby preventing the wheelchair from shaking, which is beneficial to enhancing the structural stability of the wheelchair after unfolding, thereby helping to improve the user experience; and when the wheelchair needs to be folded, the fastening effect of the fastening member 8 can be released first. Specifically, when the fastening member 8 is fastened, the movable handle 81 can be held by hand to push the connecting rod 83 to rotate in the direction of the above-mentioned receiving groove, so that the pressing block 82 on the connecting rod 83 crosses the above-mentioned clamping angle 4111. After crossing, the pressing block 82 will be pressed against the top of the clamping plate 411 under the action of the second spring 84, so that the bottom end of the clamping plate 411 presses on the clamping column 424. At this time, the clamping groove at the bottom end of the clamping plate 411 will tightly lock the sleeve 4241 on the clamping column 424. When it is necessary to release the function of the fastening member 8, the movable handle 81 is held by hand to pull the connecting rod 83 to rotate in the direction away from the receiving groove, so that the pressing block 82 of the connecting rod 83 crosses the above-mentioned clamping angle 4111 in the opposite direction; wherein, the pressing block 82 will slide relative to the connecting rod 83 when passing the clamping angle 4111, and since the above-mentioned clamping angle 4111 is set as a chamfered angle, the pressing block 82 can smoothly cross the clamping angle 4111.

In conjunction with Figures 1 to 3, and referring to Figures 4 and 5, the chassis bracket 3 of this embodiment includes a bottom frame 31 and two support frames 32, the two support frames 32 are fixedly arranged on both sides of the bottom frame 31, each support frame 32 extends along the front and rear directions of the bottom frame 31, and each support frame 32 is provided with two wheel mounting positions, each wheel mounting position is arranged along the extension direction of the support frame 32, and each wheel mounting position is installed with a moving wheel. It should be noted that the wheel mounting positions on each support frame 32 and the corresponding moving wheels can be set to more than two. Therefore, since at least two moving wheels are provided on each side of the wheelchair, on the one hand, the chassis structure composed of the chassis bracket 3 and the moving wheels can ensure the stability of the wheelchair support structure, and on the other hand, it is conducive to reducing the size of the moving wheels, thereby reducing the center of gravity of the wheelchair, making it easier to push the wheelchair over the threshold. In addition, the chassis structure of the wheelchair is relatively stable, which is conducive to improving its reliability in use. In this embodiment, the radius of each moving wheel can be 5cm-10cm, which is conducive to reducing the center of gravity of the wheelchair, making it easier to push the wheelchair over the threshold.

Specifically, the support frame 32 of the present embodiment includes an intermediate frame 321, a front support beam 322 and a rear support beam 323. The wheel mounting position is divided into a front wheel mounting position and a rear wheel mounting position. The front support beam 322 and the rear support beam 323 are respectively fixedly arranged on both sides of the intermediate frame 321, and the front wheel mounting position is formed between the front support beam 322 and the intermediate frame 321, and the rear wheel mounting position is formed between the rear support beam 323 and the intermediate frame 321; the movable wheels can be divided into a front movable wheel 9 and a rear movable wheel 10, the front movable wheel 9 is installed in the front wheel mounting position, and the rear movable wheel 10 is installed in the rear wheel mounting position. In the present embodiment, the front support beam 322 and the intermediate frame 321 are integrally formed, and the rear support beam 323 is fixedly connected to the intermediate frame 321. It should be pointed out here that the rear support beam 323 can also be integrally formed with the intermediate frame 321, and the front support beam 322 can also be fixedly connected to the intermediate frame 321. In addition, the intermediate bracket 321 of the present embodiment is connected to an installation reinforcement beam 324, and the installation reinforcement beam 324 and the front beam 311 of the bottom frame 31 and/or the installation reinforcement beam 324 and the longitudinal beam 313 of the bottom frame 31 and/or the installation reinforcement beam 324 and the rear beam 312 of the bottom frame 31 can be supported and connected through a support rod, and the installation reinforcement beam 324 includes a rear extension portion, and the rear moving wheel 10 is connected to the rear extension portion, and the front moving wheel 9 is connected to the above-mentioned front support beam 322, and the front moving wheel 9 can be a universal wheel. Furthermore, the intermediate bracket 321 of the present embodiment includes a bottom beam 3211 and two side beams 3212. The two side beams 3212 are respectively arranged at the two ends of the bottom beam 3211 to form a plug-in groove 3213 for installing the battery 17. The above-mentioned installation reinforcement beam 324 is connected to the two side beams 3212. Therefore, since the plug-in groove 3213 for installing the battery 17 is provided on the intermediate bracket 321, the battery 17 can be installed on both sides of the wheelchair, which is beneficial to increase the capacity of the battery 17 of the wheelchair and improve the endurance of the wheelchair. Moreover, this structural method is more clever and can reasonably utilize the space of the wheelchair structure, which is beneficial to improve the compactness of the wheelchair structure. The installation reinforcement beam 324 is provided, in addition to using its rear extension portion to install the rear movable wheel 10, it can also enhance the structural stability of the intermediate bracket 321.

In addition, the front support beam 322 of the present embodiment is also connected to a footrest bracket 11, and the footrest bracket 11 is equipped with a footrest 111, so that when the user sits on the wheelchair, he can put his feet on the footrest 111. On the other hand, the interior of the front support beam 322 and the intermediate bracket 321 can be hollow and connected, and the front end of the front support beam 322 can be provided with an opening, and the opening can be detachably equipped with a shell cover 3221, thereby, the internal space of the support frame 32 can be used to hide the circuit, and opening the shell cover 3221 at the above opening can facilitate the maintenance and repair of the above hidden circuit, and can also facilitate the maintenance and repair of the connection structure between the front movable wheel 9 and the front support beam 322.

In this embodiment, the bottom frame 31 includes a front beam 311, a rear beam 312 and at least two longitudinal beams 313, each longitudinal beam 313 is connected between the front beam 311 and the rear beam 312, and the two support frames 32 are connected to the two ends of the front beam 311; specifically, the two ends of the front beam 311 are connected to the bottom beam 3211 of the intermediate bracket 321 located on both sides. The folding plate frame 5 of this embodiment is tiltedly arranged between the seat 1 and the bottom frame 31, and the bottom end of the folding plate frame 5 is pivotally connected to the front beam 311, and the top end of the folding plate frame 5 is pivotally connected to the front side of the seat 1, so that the folding plate frame 5 can play the role of supporting the front side of the seat 1 and can realize the folding function. In addition, the folding plate frame 5 is provided with a positioning groove for installing the control panel 12, and the control panel 12 is installed in the positioning groove, which can realize the reasonable use of space and thus improve the compactness of the structure. The storage box 13 can be placed on the bottom frame 31 of this embodiment, and the storage box 13 is located behind the folding plate frame 5, so that the space between the seat 1 and the bottom frame 31 after the wheelchair is folded can be fully utilized. By placing the storage box 13 in the space, it is convenient for the user to store various items. In addition, the bottom end of the lower folding support rod 42 of this embodiment is fixedly supported on the rear beam 312 or one of the longitudinal beams 313, and the above-mentioned installation reinforcement beam 324 is located above the longitudinal beam 313. The lower folding support rod 42 passes through the installation reinforcement beam 324, and the middle part of the lower folding support rod 42 is supported on the installation reinforcement beam 324, so that the support of the rear side of the seat 1 and the backrest 2 can be achieved through the support function of the lower folding support rod 42. In addition, the rear beam 312 is pivotally connected to a rear bracket 14, and a tail wheel 141 is installed at the end of the rear bracket 14, and the tail wheel 141 can further support the wheelchair; a transmission rod 15 is arranged between the folding plate frame 5 and the rear bracket 14, and the two ends of the transmission rod 15 are respectively pivotally connected to the side of the folding plate frame 5 and the rear bracket 14, so that when the wheelchair is folded, the rear bracket 14 together with the tail wheel 141 are also folded and tilted, which is beneficial to further reduce the space occupied after folding.

The wheelchair of this embodiment comprises a folding mechanism including a folding bracket 4 and a folding plate frame 5. When the wheelchair is folded, the upper folding support rod 41 is rotated forward relative to the lower folding support rod 42, and the folding plate frame 5 is rotated relative to its bottom end. This enables the seat 1 to translate toward the front and bottom, and the backrest 2 to rotate relative to the lower folding support rod 42. Finally, the seat 1 and the backrest 2 can be folded onto the bottom frame 31.

In conjunction with Fig. 1 and Fig. 2, and referring to Fig. 8 to Fig. 10, the armrest device 6 of this embodiment includes a folding arm 61 and an armrest body 62, wherein the folding arm 61 is rotatably foldably connected to the seat 1, and the armrest body 62 is pivotally connected to the top of the folding arm 61. Specifically, the seat 1 is connected with a folding locking mechanism 63, and the folding arm 61 is rotatably connected to the folding locking mechanism 63. The folding locking mechanism 63 includes a shell 631, a gear 632, a linkage 633 and a rocker arm 634, wherein the folding arm 61 is pivotally connected to the shell 631 through a first pivot shaft 635, the gear 632 is arranged on the first pivot shaft 635, the linkage 633 is installed on the shell 631, and the linkage 633 is provided with a tooth key 6331a that can mesh with the gear 632, the rocker arm 634 is pivotally connected to the shell 631, and the rocker arm 634 is connected to the linkage 633, and a first torsion spring is installed at the pivot of the rocker arm 634 and the shell 631. Thus, by manipulating the rocker arm 634, the linkage member 633 can be driven to move, so that the tooth key 6331a on the linkage member 633 is disengaged from the gear 632, so that the folding arm 61 connected to the first pivot shaft 635 can be rotated, thereby enabling the armrest body 62 of the seat or wheelchair to be adjusted at any different height positions. When the rocker arm 634 is released, the rocker arm 634 will return to its original position under the action of the first torsion spring, thereby driving the linkage member 633 to return to its original position, so that the tooth key 6331a on the linkage member 633 is meshed with the gear 632, thereby enabling the armrest body 62 to be locked and suspended after the height adjustment. Therefore, the folding locking mechanism 63 of this embodiment can achieve the adjustment and suspension of the armrest body 62 at different heights, thereby facilitating the user to sit in or get out of the seat, which is conducive to improving the user experience.

Among them, the shell 631 includes a main shell 6311 and a surface shell 6312, the surface shell 6312 is covered on the main shell 6311, and the surface shell 6312 and the main shell 6311 form an installation cavity, the linkage part 633 and the gear 632 are both installed in the installation cavity, one end of the rocker arm 634 is connected to the linkage part 633, and the other end passes through the shell 631. The linkage member 633 includes an arc-shaped limiting member 6331 and a strip-shaped slider 6332. The above-mentioned tooth key 6331a is arranged on the arc-shaped limiting member 6331. The arc-shaped limiting member 6331 has a pivot end 6331b and a connecting end 6331c. The pivot end 6331b is pivoted to the main shell 6311 of the shell 631, and a second torsion spring is installed at the pivot point between the pivot end 6331b and the main shell 6311. The connecting end 6331c is movably connected to the first end of the strip-shaped slider 6332. A sliding groove is provided on the main shell 6311 of the shell 631. The strip-shaped slider 6332 can be slidably installed in the sliding groove, and the second end of the strip-shaped slider 6332 is connected to the rocker arm 634. Specifically, the rocker arm 634 includes a main arm 6341 and a connecting arm 6342. The connecting arm 6342 is arranged at one end of the main arm 6341, and the connecting arm 6342 and the main arm 6341 form an angle, which can be 90 degrees. The connecting arm 6342 is provided with a sliding hole 6342a, and the second end of the strip slider 6332 is provided with a connecting shaft 6332a, and the connecting shaft 6332a is passed through the sliding hole 6342a; the shell 631 is provided with a strip hole communicating with the above-mentioned mounting cavity, and the main arm 6341 of the rocker arm 634 extends out of the strip hole; the first pivot shaft 635 passes through the shell 631 and is connected to the bottom end of the folding arm 61. Therefore, when the main arm 6341 of the rocker arm 634 is pressed down, the connecting arm 6342 of the main arm 6341 will push the strip slider 6332 to move backward along the slide slot, and then the strip slider 6332 will drive the arc-shaped limiting member 6331 to rotate, so that the tooth key 6331a of the arc-shaped limiting member 6331 is disengaged from the gear 632 on the first pivot shaft 635. At this time, the folding arm 61 can be rotated to adjust the height of the armrest body 62, and when the rocker arm 634 is released, the rocker arm 634 will return to its original position under the action of the first torsion spring, thereby driving the strip slider 6332 to move forward along the slide groove, causing the arc-shaped limiting component 6331 to rotate in the direction of the gear 632, and the second torsion spring also drives the arc-shaped limiting component 6331 to rotate, thereby causing the tooth key 6331a on the arc-shaped limiting component 6331 to engage with the above-mentioned gear 632, thereby achieving locking of the folding arm 61 after rotation, thereby enabling the armrest body 62 to hover at any different height positions.

In addition, the top end of the upper folding support rod 41 can be pivotally connected to the shell 631, and the bottom of the backrest 2 can be fixedly connected to the shell 631, thereby realizing the relative rotation between the seat 1 and the upper folding support rod 41, that is, realizing the relative rotation between the folding bracket 4 together with the backrest 2 and the seat 1, so that during the folding process of the folding bracket 4, the backrest 2 and the seat 1 can be folded in half, and then the backrest 2 and the seat 1 can be folded together on the chassis bracket 3.

The folding arm 61 of this embodiment may include a first folding arm 611 and a second folding arm 612. The bottom end of the first folding arm 611 is connected to the first pivot shaft 635. The bottom end of the second folding arm 612 is pivotally connected to the main housing 6311 of the shell 631 through the second pivot shaft 636. The top end of the first folding arm 611 and the top end of the second folding arm 612 are pivotally connected to the armrest body 62. The first folding arm 611 and the second folding arm 612 are arranged in parallel with each other, and the second folding arm 612 is provided with a first groove extending along its length direction. The first folding arm 611 can be movably accommodated in the first groove. Thus, the armrest body 62 can be stably supported by the first folding arm 611 and the second folding arm 612, and the first folding arm 611 and the second folding arm 612 can always support the armrest body 62 to be parallel or substantially parallel to the seat 1 during the rotation and folding process, and the rotation and folding of the first folding arm 611 and the second folding arm 612 can realize the height adjustment of the armrest body 62, so that it is convenient for the user to sit in or get out of the wheelchair. On the other hand, when the first folding arm 611 and the second folding arm 612 are rotated and folded, the height of the armrest body 62 can be lowered to the position of the seat 1 of the wheelchair, which is conducive to reducing the space occupied by the wheelchair after folding, and can make the folded structure more compact. The way of covering the first folding arm 611 with the first groove can not only enhance the stability of the supporting structure and enhance the compactness of the structure, but also help to enhance the overall appearance of the product.

Furthermore, the first folding arm 611 and the second folding arm 612 are connected to the armrest body 62 via the same support 64. The support 64 includes a connecting plate 641, a first pivoting plate 642, and a second pivoting plate 643. The first pivoting plate 642 and the second pivoting plate 643 are respectively fixedly arranged on the bottom surface of the connecting plate 641. The connecting plate 641 is detachably mounted on the bottom of the armrest body 62. The first folding arm 611 is pivotally connected to the first pivoting plate 642, and the second folding arm 612 is pivotally connected to the second pivoting plate 643. Specifically, the second folding arm 612 is closer to the rear end of the armrest body 62 than the first folding arm 611, the length of the second pivot plate 643 is greater than the length of the first pivot plate 642, and the first folding arm 611 is provided with a second groove extending along its length direction, and the first and second pivot plates 643 are accommodated in the second groove. Therefore, when the first folding arm 611 and the second folding arm 612 are rotated and folded and the height of the armrest body 62 is adjusted and hovered, the first folding arm 611 and the second folding arm 612 can always support the armrest body 62 to be parallel or basically parallel to the seat 1, thereby better ensuring the armrest function of the armrest body 62. In this embodiment, the cross-section of the first folding arm 611 and the cross-section of the second folding arm 612 are both semi-waist-shaped, and the first folding arm 611 and the second folding arm 612 are arranged relatively to each other, thereby enabling the first groove on the second folding arm 612 to cover the first folding arm 611, and the second groove on the first folding arm 611 to cover the second pivot plate 643, thereby facilitating the relative movement of the first folding arm 611 and the second folding arm 612 during the rotational folding process to ensure the smooth rotational folding. Moreover, through this structural method, the overall appearance of the folding arm 61 can also be improved. In addition, at least one row of mounting holes 621 is provided at the bottom of the armrest body 62, and at least two through holes 6411 are provided on the connecting plate 641 of the support 64. Each through hole 6411 is connected to the corresponding mounting hole 621 by bolts, so that the support 64 and the folding arm 61 can be detachably connected to the armrest body 62, and the armrest body 62 can adjust its front-to-back relative position and/or left-to-right relative position with the support 64 and the folding arm 61 as needed to better meet user needs. Moreover, the armrest body 62 of this embodiment is hollow inside, and a through opening can be provided on its side, and a cover body can be detachably installed at the through opening, so that the disassembly and assembly between the armrest body 61 and the support 64 can be facilitated.

The wheelchair of this embodiment can be an electric wheelchair, see Figures 1 and 2. Specifically, a control panel 12 is installed in the positioning groove of the above-mentioned folding plate frame 5, and a control box 16 can be installed at the front end of one of the armrest bodies 62. The control box 16 can be provided with a rocker and various control buttons for controlling the forward or backward movement of the wheelchair. The middle brackets 321 on both sides of the wheelchair can be respectively inserted with batteries 17. The above-mentioned rear moving wheels 10 are connected to a drive motor 18, and the drive motor 18, the control box 16 and the battery 17 are respectively electrically connected to the control panel 12. Therefore, the control panel 12 can control the drive motor 18 according to the setting of the control box 16 to achieve control of the movement of the wheelchair.

The folding process of the wheelchair of this embodiment can be specifically as follows: first pull the movable handle 81 of the above-mentioned fastening member 8 to release the fastening of the fastening member 8 to the clamping plate 411, then pull the pull line 72 of the latch device 7 to shrink the latch body 71 of the latch device 7 from the engaging recess of the upper folding support rod 41 and the perforation of the first support plate 421, then press down the rocker arm 634 of the folding locking mechanism 63 to fold the armrest device 6 on the seat 1, and then press down the backrest 2 to rotate and fold the upper folding support rod 41 and the folding plate frame 5, so that the backrest 2 and the seat 1 are superimposed on the chassis bracket 3, and the wheelchair is folded. The rotation and folding direction of each component of the wheelchair can be specifically shown by the arrows in Figure 3.

The unfolding process of the wheelchair of the present embodiment can be specifically as follows: lift the backrest 2 and the seat 1, so that the engaging recessed position of the upper folding support rod 41 and the through hole of the above-mentioned first support plate 421 are aligned, and then the latch body 71 of the latch device 7 is snapped into the through hole and the engaging recessed position under the action of the spring, so as to achieve the relative fixation of the upper folding support rod 41 and the lower folding support rod 42, and then push the movable handle 81 of the above-mentioned buckle 8 to buckle the buckle 8 on the card plate 411, so that the wheelchair can be folded and unfolded.

In summary, the wheelchair of this embodiment realizes folding and unfolding of the wheelchair through the folding mechanism composed of the folding bracket 4 and the folding plate frame 5, and realizes the fixation of the wheelchair after unfolding through the latch device 7, and also improves the stability of the structure of the wheelchair after unfolding through the stabilization mechanism composed of the buckle 8, the clamping plate 411 and the clamping column 424, so as to prevent the wheelchair from shaking. In addition, the armrest device 6 of this embodiment can be folded and lifted separately, and its folding locking mechanism 63 can also realize the hovering or positioning of the armrest body 62 at any height. Therefore, the wheelchair of this embodiment can bring a better experience to the user.

It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims (29)

1. A wheelchair, characterized in that it comprises a seat, a backrest, a chassis bracket, a folding bracket, a folding plate frame and an armrest device, wherein the top end of the folding bracket is pivotally connected to the rear side of the seat, and the top end of the folding bracket is connected to the bottom of the backrest, the bottom end of the folding bracket is connected to the chassis bracket, the top end of the folding plate frame is pivotally connected to the seat, the bottom end of the folding plate frame is pivotally connected to the chassis bracket, and the armrest device is foldably connected to the seat; The folding bracket includes an upper folding support rod and a lower folding support rod, the top end of the upper folding support rod is pivotally connected to the rear side of the seat, and the top end of the upper folding support rod is fixedly connected to the bottom of the backrest, the bottom end of the upper folding support rod is pivotally connected to the top end of the lower folding support rod, and the bottom end of the lower folding support rod is fixedly supported on the chassis bracket; The lower folding support rod comprises a main rod body, a first support plate and a second support plate, wherein the first support plate and the second support plate are both arranged at the top end of the main rod body, and the first support plate and the second support plate are arranged parallel to each other, and a mounting groove is formed between the first support plate and the second support plate, and the upper folding support rod extends into the mounting groove and is pivotally connected to the lower folding support rod; The first support plate is provided with a latch device, the latch device includes a latch body, the first support plate is provided with a through hole, the upper folding support rod is provided with a snap-fitting recess, and the latch body is telescopically inserted into the through hole and the snap-fitting recess; The upper folding support rod is provided with a card plate arranged along its extension direction, a card column is connected between the first support plate and the second support plate, and the card column is located beside the main rod body, and the card column is perpendicular to the plane where the card plate is located, and the lower folding support rod or the card column is connected with a buckle, and the buckle is buckled with the card plate so that the bottom end of the card plate is pressed against the card column. 2. The wheelchair according to claim 1 is characterized in that the buckling part includes a movable handle, a pressure block, a connecting rod and a spring, the pressure block is slidably connected to the connecting rod, the connecting rod is connected to the clamping column, and the connecting rod can rotate around the clamping column with the clamping column as the rotating axis, the spring is connected between the pressure block and the clamping column, and the movable handle is connected to the top end of the connecting rod. 3. The wheelchair according to claim 2 is characterized in that the number of the clamping plates is two, the two clamping plates are both arranged in the mounting groove and are parallel to each other, and an accommodating groove for accommodating the connecting rod is formed between the two clamping plates. 4. The wheelchair according to claim 1, characterized in that a bottom end of the clamping plate is provided with a clamping groove that matches the outer peripheral surface of the clamping column. 5. The wheelchair according to claim 1 is characterized in that the chassis bracket includes a longitudinal beam and a mounting reinforcement beam, the mounting reinforcement beam is arranged above the longitudinal beam, the bottom end of the lower folding support rod is fixedly supported on the longitudinal beam, and the middle part of the lower folding support rod is fixedly supported on the mounting reinforcement beam. 6. The wheelchair according to claim 1 is characterized in that the armrest device includes a folding locking mechanism, the folding locking mechanism is arranged on the rear side of the seat, the folding locking mechanism includes a shell, the top end of the upper folding support rod is pivotally connected to the shell, and the bottom of the backrest is fixedly connected to the shell. 7. The wheelchair according to claim 1, characterized in that the top end of the folding plate frame is pivotally connected to the front side of the seat, and the bottom end of the folding plate frame is pivotally connected to the chassis bracket. 8. The wheelchair according to claim 7, characterized in that the chassis support includes a front beam, and the bottom end of the folding plate frame is pivotally connected to the front beam. 9. The wheelchair according to claim 7, characterized in that a positioning groove for installing a control panel is provided on the folding plate frame. 10. The wheelchair according to claim 1 is characterized in that the chassis bracket includes a bottom frame and two support frames, the two support frames are respectively fixedly arranged on both sides of the bottom frame, the support frames extend along the front and rear directions of the bottom frame, and the support frames are provided with at least two wheel mounting positions, each of the wheel mounting positions is arranged along the extension direction of the support frame, and movable wheels are installed in the wheel mounting positions. 11. The wheelchair according to claim 10 is characterized in that the support frame includes an intermediate frame, a front support beam and a rear support beam, the wheel mounting position is divided into a front wheel mounting position and a rear wheel mounting position, the front support beam and the rear support beam are respectively fixedly arranged on both sides of the intermediate frame, and the front wheel mounting position is formed between the front support beam and the intermediate frame, and the rear wheel mounting position is formed between the rear support beam and the intermediate frame; the movable wheel is divided into a front movable wheel and a rear movable wheel, the front movable wheel is installed in the front wheel mounting position, and the front movable wheel is connected to the front support beam, and the rear movable wheel is installed in the rear wheel mounting position. 12. The wheelchair according to claim 11, characterized in that the intermediate bracket is connected to a mounting reinforcement beam, the mounting reinforcement beam includes a rear extension portion, and the rear movable wheel is connected to the rear extension portion. 13. The wheelchair according to claim 12 is characterized in that the intermediate bracket includes a bottom beam and two side beams, the two side beams are respectively arranged at both ends of the bottom beam to form plug-in grooves for battery installation, and the installation reinforcement beam is connected to the two side beams. 14. The wheelchair according to claim 10, characterized in that the bottom frame comprises a front beam, a rear beam and at least two longitudinal beams, each of the longitudinal beams is respectively connected between the front beam and the rear beam, and the two support frames are respectively connected to the two ends of the front beam. 15. The wheelchair according to claim 14 is characterized in that the rear beam is pivotally connected to a tail bracket, a tail wheel is installed at the end of the tail bracket, a transmission rod is arranged between the folding plate frame and the tail bracket, and two ends of the transmission rod are pivotally connected to the folding plate frame and the tail bracket respectively. 16. The wheelchair according to any one of claims 1 to 15, characterized in that the armrest device comprises a folding arm and an armrest body, the folding arm is rotatably and foldably connected to the seat, and the armrest body is pivotally connected to the top end of the folding arm. 17. The wheelchair according to claim 16, characterized in that the seat is connected to a folding locking mechanism, and the folding arm is rotatably connected to the folding locking mechanism. 18. The wheelchair according to claim 17 is characterized in that the folding locking mechanism includes a shell, a gear, a linkage and a rocker arm, the folding arm is pivoted to the shell via a first pivot shaft, the gear is disposed on the first pivot shaft, the linkage is mounted on the shell, and the linkage is provided with a tooth key that can mesh with the gear, the rocker arm is pivoted to the shell, and the rocker arm is connected to the linkage, and a torsion spring is installed at the pivot joint between the rocker arm and the shell. 19. The wheelchair according to claim 18 is characterized in that the linkage member includes an arc-shaped limiting member and a strip slider, the tooth key is arranged on the arc-shaped limiting member, the arc-shaped limiting member has a pivot end and a connecting end, the pivot end is pivoted to the shell, the connecting end is connected to the first end of the strip slider, the shell is provided with a slide groove, the strip slider can be slidably installed in the slide groove, and the second end of the strip slider is connected to the rocker arm. 20. The wheelchair according to claim 19 is characterized in that the rocker arm includes a main arm and a connecting arm, the connecting arm is arranged at one end of the main arm, and the connecting arm and the main arm form an angle, the connecting arm is provided with a sliding hole, and the second end of the strip slider is provided with a connecting shaft, and the connecting shaft is passed through the sliding hole. 21. The wheelchair according to claim 18 is characterized in that the shell has an installation cavity, and the shell is provided with a strip hole communicating with the installation cavity, the gear and the linkage are both installed in the installation cavity, the rocker arm extends from the strip hole, and the first pivot shaft passes through the shell and is connected to the bottom end of the folding arm. 22. The wheelchair according to claim 18 is characterized in that the folding arm includes a first folding arm and a second folding arm, the bottom end of the first folding arm is connected to the shell through the first pivot axis, the bottom end of the second folding arm is pivoted to the shell through the second pivot axis, and the top end of the first folding arm and the top end of the second folding arm are pivoted to the armrest body respectively. 23. The wheelchair according to claim 22, characterized in that the first folding arm and the second folding arm are arranged in parallel with each other, the second folding arm is provided with a first groove extending along the length direction thereof, and the first folding arm can be movably accommodated in the first groove. 24. The wheelchair according to claim 22, characterized in that a support is fixedly installed at the bottom of the armrest body, and the first folding arm and the second folding arm are respectively connected to the armrest body through the support. 25. The wheelchair according to claim 24 is characterized in that the support includes a connecting plate, a first pivot plate and a second pivot plate, the first pivot plate and the second pivot plate are arranged on the bottom surface of the connecting plate, the first folding arm is pivotally connected to the first pivot plate, and the second folding arm is pivotally connected to the second pivot plate. 26. The wheelchair according to claim 25, characterized in that the second folding arm is closer to the rear end of the armrest body than the first folding arm, and the length of the second pivot plate is greater than the length of the first pivot plate. 27. The wheelchair according to claim 26, characterized in that the first folding arm is provided with a second groove extending along the length direction thereof, and the second pivot plate is accommodated in the second groove. 28. The wheelchair according to claim 24, characterized in that at least one row of mounting holes is provided at the bottom of the armrest body, and the support is provided with at least two through holes, and each of the through holes is connected to the corresponding mounting hole by a bolt. 29. The wheelchair according to claim 22, characterized in that the cross-section of the first folding arm and the cross-section of the second folding arm are both half-waist-shaped, and the first folding arm and the second folding arm are arranged opposite to each other.