CN209091916U - Wheelchair and stability augmentation mechanism thereof - Google Patents

Abstract

The utility model provides a wheelchair and its stabilization mechanism, comprising an upper folding support rod and a lower folding support rod, the upper folding support rod and the lower folding support rod are pivotally connected, and the upper folding support rod is provided with There is a clamping plate, the lower folding support rod is connected with a clamping column, and the lower folding support rod or the clamping column is connected with a fastener, and the fastener is fastened to the clamping plate to make the clamping The plate is pressed against the clamping post. The stabilization mechanism can make the structure of the wheelchair more stable after being folded and unfolded, and is less prone to shaking.

Description

A wheelchair and its stabilization mechanism

technical field

The utility model relates to the technical field of wheelchairs, in particular to a wheelchair and its stabilization structure.

Background technique

Wheelchair is an important tool for rehabilitation. Wheelchair is a means of transportation for the physically disabled and people with limited mobility, which can facilitate them to exercise and participate in social activities. At present, some wheelchairs have a foldable structure so that they can be easily folded and placed when not in use. However, the fixation of the existing wheelchairs after being folded and unfolded is still not stable enough, which causes the wheelchair to shake easily.

SUMMARY OF THE INVENTION

Based on this, the purpose of the present invention is to provide a stabilization mechanism for a wheelchair, which can make the structure of the wheelchair more stable after being folded and unfolded, and is less prone to shaking.

The technical scheme of the utility model is: a stabilization mechanism for a wheelchair, comprising an upper folding support rod and a lower folding support rod, the upper folding support rod and the lower folding support rod are pivotally connected, and the upper folding support rod The rod is provided with a clamping plate, the lower folding support rod is connected with a clamping column, and the lower folding support rod or the clamping column is connected with a fastening piece, and the fastening piece is fastened to the clamping board to make all the The card plate is pressed against the card post.

Optionally, the clamping plate is arranged along the extension direction of the upper folding support rod, the clamping column is perpendicular to the plane on which the clamping plate is located, and the fastener makes the bottom of the clamping plate when the fastener is fastened. The end is pressed against the clamping post.

Optionally, the bottom end of the card plate is provided with a card slot matched with the outer peripheral surface of the card column.

Optionally, a sleeve mat adapted to the card slot is sleeved on the card post.

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 on the top end of the main rod body, and the The first support plate and the second support plate are arranged parallel to each other, 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 connected to the The lower folding support rods are pivotally connected.

Optionally, the clamping column is connected between the first support plate and the second supporting plate, and the clamping column is located on the side of the main rod body.

Optionally, the fastener includes a pressing block, a connecting rod and a spring, the pressing block is slidably connected to the connecting rod, the connecting rod is connected to the clamping post, and the connecting rod is slidably connected to the connecting rod. The clamping column can be rotated around the clamping column by using the clamping column as a rotation axis, and the spring is connected between the pressing block and the clamping column.

Optionally, the top end of the connecting rod is connected with a movable handle.

Optionally, the clamping column can rotate around its own central axis, the connecting rod is fixedly inserted into the clamping column, and the connecting rod is perpendicular to the clamping column.

Optionally, the top of the card board is provided with a corner, and the corner is set as a rounded corner.

Optionally, there are two card plates, both of which are arranged in the installation grooves and are parallel to each other, and an accommodation space for accommodating the connecting rod is formed between the two card plates. groove.

Optionally, a latch device is installed on the first support plate, the latch device includes a latch body, the first support plate is provided with a perforation, and the upper folding support rod is provided with an engaging recess, so The plug body is retractably inserted in the through hole and the engaging recess.

In order to solve the above same technical problems, the present invention also provides a wheelchair, which includes a seat, a bottom frame and the above-mentioned stabilization mechanism, the top of the upper folding support rod is connected with the seat, and the lower folding The support rod is fixedly supported on the bottom frame.

Implementing the embodiment of the present utility model has the following beneficial effects:

The stabilization mechanism of the utility model is arranged on the clamping plate of the upper folding support rod and the clamping column connected to the lower folding supporting rod, and the lower folding support rod or the clamping column is also connected with a fastener, which is composed of Therefore, when the fastener is fastened to the card plate, the card plate can be pressed against the card post, so that the upper folding support rod and the lower folding support rod can be more securely fixed after being folded and unfolded. In order to be stable, the wheelchair can be prevented from shaking, which is beneficial to improve the user experience.

Description of drawings

FIG. 1 is a schematic diagram of the first overall structure of the wheelchair according to this embodiment.

FIG. 2 is a schematic diagram of the second overall structure of the wheelchair according to this embodiment.

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

FIG. 4 is a schematic structural diagram of the wheelchair according to the present 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 according to the present embodiment.

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 this embodiment.

FIG. 8 is a schematic diagram of the assembly structure among the seat, backrest, armrest device and folding bracket according to this embodiment.

FIG. 9 is a schematic structural diagram of the folding locking mechanism according to this embodiment.

FIG. 10 is a schematic diagram of the assembly structure between the folding arm and the armrest body according to the present embodiment.

Description of reference numbers:

1. Seat, 2. Backrest, 3. Chassis bracket, 31, Bottom frame, 311, Front beam, 312, Rear beam, 313, Longitudinal beam, 32, Support frame, 321, Intermediate 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 strut, 411, Card plate, 4111, clip angle, 42, lower folding support rod, 421, first support plate, 422, second support plate, 423, main rod body, 424, clip column, 4241, cover cushion, 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, casing, 6311, main casing, 6312, face shell, 632, gear, 633, linkage, 6331, arc limit member, 6331a, tooth key, 6331b, pivot end, 6331c, connecting end, 6332, bar 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 , the first pivot plate, 643, the second pivot plate, 7, the pin device, 71, the pin body, 72, the pull wire, 73, the first spring, 74, the installation sleeve, 75, the stop sleeve, 8, Buckle, 81, movable handle, 82, pressing block, 83, connecting rod, 84, second spring, 9, front moving wheel, 10, rear moving wheel, 11, pedal bracket, 111, foot pedal, 12, control board, 13, storage box, 14, tail bracket, 141, tail wheel, 15, transmission rod, 16, control box, 17, battery, 18, drive motor.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 reference to the present utility model. limits.

1 to 4, the present embodiment provides a wheelchair, which includes a seat 1, a backrest 2, a chassis bracket 3, a folding bracket 4, a folding plate frame 5 and an armrest device 6, and the top of the folding bracket 4 is pivotally connected to the chair The rear side of the seat 1, and the top end of the folding bracket 4 is connected with the bottom of the backrest 2, the bottom end of the folding bracket 4 is connected with the chassis bracket 3, the top end of the folding plate frame 5 is pivotally connected with the seat 1, and the folding plate The bottom end of the frame 5 is pivotally connected with 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 and the backrest 2 can be folded on the chassis bracket 3 by 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 needs to rotate and fold the folding bracket 4, the folding plate frame 5 and the armrest device 6 through a simple action. This folding method is more convenient, and the folded structure is also relatively compact and neat, which is beneficial to Reduce footprint.

2 to 4 , and referring to FIGS. 6 and 7 , the folding bracket 4 of this embodiment includes an upper folding support rod 41 and a lower folding support rod 42 , and the top end of the upper folding support rod 41 is pivotally connected to the bottom of the seat 1 . At the rear side, the top end of the upper folding support rod 41 is fixedly connected with the bottom of the backrest 2, the bottom end of the upper folding support rod 41 is pivotally connected with 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 first support plate 421 and a second support plate 422, and the first support plate 421 and the second support plate 422 are both provided on the main The top end of the rod body 423, and the first support plate 421 and the second support plate 422 are arranged parallel to each other, an installation 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 installation groove It is pivotally connected with 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 realize the folding function. A latch device 7 is mounted on the first support plate 421. The latch device 7 includes a latch body 71, a pull wire 72, a first spring 73, an installation sleeve 74 and a stop sleeve 75. The stop sleeve 75 is connected to the installation sleeve One end of the tube 74, and the diameter of the stop sleeve 75 is smaller than the diameter of the installation sleeve 74, the plug body 71 is inserted through the stop through sleeve and the installation sleeve 74, the plug body 71 is provided with steps, the first spring 73 It is installed in the installation sleeve 74, and the two ends of the first spring 73 abut against the steps and the ends of the stop sleeve 75, respectively. The other end of the installation sleeve 74 protrudes, the first support plate 421 is provided with a perforation, the upper folding support rod 41 is provided with an engaging recess, and the plug body 71 extends from the installation sleeve 74 and is retractably inserted into the perforation. and the engaging recess. Since the foldable brackets 4 on both sides of the wheelchair are installed with the 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 drawn from the corresponding through holes. When the upper foldable strut 41 is rotated and folded relative to the lower foldable strut 42, when the upper foldable strut 41 is unfolded relative to the lower foldable strut 42 to the perforation and the engagement recess When the timing is correct, the latch body 71 will protrude into the through hole and the engaging recess under the action of the spring, so that the relative fixation between the upper folding support rod 41 and the lower folding support rod 42 can be achieved.

Further, the upper folding support rod 41 is provided with a clamping plate 411 arranged along its extending direction, and a clamping column 424 is connected between the first supporting plate 421 and the second supporting plate 422 at the top of the lower folding supporting rod 42, and the clamping column 424 is located at the top of the lower folding support rod 42. The side of the main rod body 423, and the clamping column 424 is perpendicular to the plane where the clamping plate 411 is located. The bottom end of the clamping plate 411 is pressed against the clamping column 424 . The fastener 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, and one end of the connecting rod 83 is connected to the clamping post 424, and the connecting rod 83 can rotate around the locking column 424 with the locking column 424 as the rotation axis. Specifically: the bottom end of the clamping plate 411 is provided with a clamping slot that matches the outer peripheral surface of the clamping column 424, and the clamping column 424 is sleeved with a sleeve pad 4241 that fits with the clamping slot; and the clamping column 424 can wrap around its center. The axis rotates, the connecting rod 83 is fixedly inserted on the clamping column 424, and the connecting rod 83 is perpendicular to the clamping column 424; in addition, the top end of the clamping plate 411 is provided with a clamping angle 4111, and the clamping angle 4111 is set as a rounded corner; The above-mentioned clamping plates 411 are set to two, the two clamping plates 411 are both disposed in the installation grooves and are parallel to each other, and an accommodation groove for accommodating the connecting rod 83 is formed between the two clamping plates 411 . Therefore, when the upper folding support rod 41 is unfolded relative to the lower folding support rod 42 and the relative fixing between the two is achieved by the latch device 7, the fastener 8 can be fastened on the card board 411 to lock the clamping plate 411. The bottom end is pressed against the clamping post 424 to realize further fixing between the upper folding support rod 41 and the lower folding support rod 42, so that the fixing of the two after unfolding is more stable, which can prevent the wheelchair from shaking, which is beneficial to enhance the wheelchair The structural stability after unfolding is beneficial to improve user experience; and when the wheelchair needs to be folded, the buckling effect of the buckling member 8 can be released first. Specifically, when the clasping member 8 is clasped, the movable handle 81 can be held by hand to push the connecting rod 83 to rotate in the direction of the above-mentioned accommodating groove, so that the pressing block 82 on the connecting rod 83 straddles the above-mentioned clamping angle 4111. After crossing, the pressing block 82 will press against the top of the card board 411 under the action of the second spring 84, so that the bottom end of the card board 411 is pressed against the card post 424. At this time, the card slot at the bottom end of the card board 411 The sleeve pad 4241 on the clamping post 424 will be tightly fastened, and when the action of the fastener 8 needs to be released, the movable handle 81 is held to pull the connecting rod 83 to rotate in the direction away from the accommodating groove, so that the pressing block of the connecting rod 83 is pressed. 82 can cross 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 through the clamping angle 4111, and since the above-mentioned clamping angle 4111 is set as a rounded corner, it can make The pressing block 82 smoothly crosses the clamping angle 4111 .

Referring to FIGS. 1 to 3 , and referring to FIGS. 4 and 5 , the chassis bracket 3 of this embodiment includes a bottom frame 31 and two supporting frames 32 , and the two supporting frames 32 are respectively fixed on both sides of the bottom frame 31 , each The support frames 32 respectively extend 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 extending direction of the support frame 32, and each wheel mounting position is installed in There are moving wheels. It should be noted that, the number of wheel installation positions and corresponding moving wheels on each support frame 32 may be set to more than two. Therefore, since each side of the wheelchair is provided with at least two moving wheels, on the one hand, the chassis structure formed by the chassis bracket 3 and the moving wheels can ensure the stability of the wheelchair supporting structure, and on the other hand, it is beneficial to reduce the movement of the wheelchair. The size of the wheels, which lowers the wheelchair's center of gravity, making it easier to push the wheelchair over thresholds. In addition, the chassis structure of the wheelchair is relatively stable, which is beneficial to improve the reliability of its use. In this embodiment, the radius of each moving wheel may be 5cm-10cm, which is beneficial to lower the center of gravity of the wheelchair and make it easier to push the wheelchair over the threshold.

Specifically, the support frame 32 in this embodiment includes an intermediate support 321, a front support beam 322 and a rear support beam 323. The above wheel installation positions are divided into a front wheel installation position and a rear wheel installation position. The front support beam 322 and the rear support beam 323 They are respectively fixed on both sides of the middle bracket 321, and the front wheel installation position is formed between the front support beam 322 and the middle bracket 321, and the rear wheel installation position is formed between the rear support beam 323 and the middle bracket 321; It is divided into a front moving wheel 9 and a rear moving wheel 10, the front moving wheel 9 is installed in the front wheel installation position, and the rear moving wheel 10 is installed in the rear wheel installation position. In this embodiment, the front support beam 322 and the middle bracket 321 are integrally formed, and the rear support beam 323 is fixedly connected to the middle bracket 321. It should be pointed out here that the rear support beam 323 can also be integrally formed with the middle bracket 321, while the front support beam 323 can also be integrally formed with the middle bracket 321. The support beam 322 can also be fixedly mounted on the intermediate bracket 321 in a fixed connection manner. In addition, the middle bracket 321 of this embodiment is connected with a mounting reinforcing beam 324, and between the mounting reinforcing beam 324 and the front beam 311 of the bottom frame 31 and/or between the mounting reinforcing beam 324 and the longitudinal beam 313 of the bottom frame 31 and/or Alternatively, the installation reinforcement beam 324 and the rear beam 312 of the bottom frame 31 can be supported and connected by a support rod. The installation reinforcement beam 324 includes a rear extension, the rear moving wheel 10 is connected to the rear extension, and the front moving wheel 9 is connected to the rear extension. The above-mentioned front support beams 322 are connected, and the front moving wheel 9 can be a universal wheel. Further, the intermediate support 321 in this embodiment includes a bottom beam 3211 and two side beams 3212. The two side beams 3212 are respectively disposed at both ends of the bottom beam 3211 to form plugging grooves 3213 for the battery 17 to be installed. The reinforcing beam 324 is connected to the two side beams 3212. Therefore, since the insertion groove 3213 for installing the battery 17 is provided on the middle bracket 321, the battery 17 can be installed on both sides of the wheelchair, which is beneficial to increase the size of the wheelchair. The capacity of the battery is 17%, which improves the battery life of the wheelchair, and the structure is ingenious, which can rationally use the space of the wheelchair structure and improve the compactness of the wheelchair structure; and the installation of the reinforcement beam 324, in addition to using its rear extension to install In addition to moving the wheel 10 rearward, the structural stability of the intermediate bracket 321 can also be enhanced.

In addition, the front support beam 322 of this embodiment is also connected with a footrest 11, and the footrest 11 is installed with the footrest 111, so that when the user is sitting on the wheelchair, the user can put his feet on the footrest 111 . On the other hand, the interior of the front support beam 322 and the middle bracket 321 may be hollow and communicated, and the front end of the front support beam 322 may be provided with an opening, and the cover 3221 may be detachably installed at the opening, so that the The inner space of the support frame 32 is used to hide the circuit, and opening the cover 3221 at the opening can facilitate the maintenance and repair of the hidden circuit, and also facilitate the connection between the front mobile wheel 9 and the front support beam 322 Maintenance and repair of structures.

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 respectively, and the above-mentioned two support frames 32 are respectively connected to Two ends of the front beam 311 ; specifically, the two ends of the front beam 311 are respectively connected to the bottom beams 3211 of the middle brackets 321 located on both sides. The folding plate frame 5 of this embodiment is inclined 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 connected to the seat seat. The front side parts of the seat 1 are pivotally connected, so the folding plate frame 5 can play the role of supporting the front side part 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 board 12, and the control board 12 is installed in the positioning groove, which can realize the rational use of space, and further 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. Placing the storage box 13 in this space can provide convenience for the user to store various items. In addition, the bottom end of the lower folding support rod 42 in this embodiment is fixedly supported on the rear beam 312 or one of the longitudinal beams 313, the above-mentioned mounting reinforcement beam 324 is located above the longitudinal beam 313, and the lower folding support rod 42 passes through the installation reinforcement The middle part of the lower folding support rod 42 is supported on the installation reinforcement beam 324 , so that the rear side of the seat 1 and the backrest 2 can be supported by the supporting action of the lower folding support rod 42 . In addition, the rear beam 312 is pivotally connected with a tail bracket 14, and a tail wheel 141 is installed at the end of the tail bracket 14. The tail wheel 141 can further support the wheelchair; a transmission is provided between the folding plate frame 5 and the tail bracket 14. The rod 15 and the two ends of the transmission rod 15 are pivotally connected to the side edge of the folding plate frame 5 and the tail bracket 14, so that when the wheelchair is folded, the tail bracket 14 and the tail wheel 141 are also folded and tilted, which is conducive to further reducing the The space occupied when folded.

The wheelchair of this embodiment constitutes a folding mechanism by the folding bracket 4 and the 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 board frame is rotated forward. 5 is rotated relative to its bottom end, so that the seat 1 can be translated forward and downward, and the backrest 2 can be rotated relative to the lower folding support rod 42, and finally the seat 1 and the backrest 2 can be folded on the bottom frame 31 above.

1 and 2 , and referring to FIGS. 8 to 10 , the armrest device 6 of this embodiment includes a folding arm 61 and an armrest body 62 . The folding arm 61 is rotatably and foldably connected to the seat 1 , and the armrest body 62 and the folding arm The top ends of 61 are pivotally connected. 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 casing 631 , a gear 632 , a linkage 633 and a rocker arm 634 . The folding arm 61 is pivotally connected to the casing 631 through a first pivot shaft 635 , and the gear 632 is arranged on the first pivot shaft 635 , the linkage member 633 is installed on the shell member 631, and the linkage member 633 is provided with a tooth key 6331a that can engage with the gear 632, the rocker arm 634 is pivotally connected to the shell member 631, and the rocker arm 634 is connected with the linkage member 633, A first torsion spring is installed at the pivot connection between the rocker arm 634 and the shell 631 . Therefore, 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 rotate. Then, the armrest body 62 of the seat or wheelchair can be adjusted at any different heights, and when the rocker arm 634 is loosened, the rocker arm 634 will return to its position under the action of the first torsion spring, thereby driving the linkage 633 to return. Return to position, so that the tooth key 6331a on the linkage 633 meshes with the gear 632, so that the position locking and hovering of the armrest body 62 after the height adjustment can be realized. Therefore, the folding locking mechanism 63 of this embodiment can realize the adjustment and hovering of the armrest body 62 at different heights, thereby facilitating the user to sit in or get out of the seat, which is beneficial to improve user experience.

The shell 631 includes a main casing 6311 and a face casing 6312, the face casing 6312 is covered on the main casing 6311, and the face casing 6312 and the main casing 6311 enclose an installation cavity, and the linkage 633 and the gear 632 are installed in In the installation cavity, one end of the rocker arm 634 is connected with the linkage member 633 , and the other end passes through the shell member 631 . The linkage 633 includes an arc-shaped limiting member 6331 and a bar-shaped slider 6332. The tooth key 6331a is provided on the arc-shaped limiting member 6331. The arc-shaped limiting member 6331 has a pivot end 6331b and a connecting end 6331c. 6331b is pivotally connected with the main casing 6311 of the shell 631, and a second torsion spring is installed at the pivot connection between the pivot end 6331b and the main casing 6311, and the connecting end 6331c is movably connected with the first end of the bar-shaped slider 6332 , the main housing 6311 of the shell 631 is provided with a chute, the bar-shaped slider 6332 is slidably installed in the chute, and the second end of the bar-shaped slider 6332 is connected with the rocker arm 634 . Specifically, the rocker arm 634 includes a main arm 6341 and a connecting arm 6342. The connecting arm 6342 is provided at one end of the main arm 6341, and the connecting arm 6342 and the main arm 6341 form an included angle, which can be 90 degrees. There is a sliding hole 6342a, the second end of the bar-shaped slider 6332 is provided with a connecting shaft 6332a, and the connecting shaft 6332a passes through the sliding hole 6342a; and the shell 631 is provided with a bar-shaped hole communicating with the above-mentioned installation cavity, and the rocker arm 634 The main arm 6341 protrudes from the strip hole; the first pivot shaft 635 protrudes from the casing 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 bar-shaped slider 6332 to move backward along the chute, and then the bar-shaped slider 6332 will drive the arc-shaped limiting member 6331 to rotate , 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 bar-shaped slider 6332 to move forward along the chute, so that the arc-shaped limiting member 6331 rotates in the direction of the gear 632, and the second The torsion spring also drives the arc-shaped limiting member 6331 to rotate, so that the tooth key 6331a on the arc-shaped limiting member 6331 meshes with the above-mentioned gear 632 to realize the locking of the folding arm 61 after rotation, thus realizing the armrest body. 62 Hover at any different height positions.

In addition, the top of the above-mentioned upper folding support rod 41 can be pivotally connected with the shell member 631, and the bottom of the backrest 2 can be fixedly connected with the shell member 631, so that the relative rotation between the seat 1 and the upper folding support rod 41 can be realized. , that is, the relative rotation between the folding bracket 4 and the backrest 2 and the seat 1 is realized, so that in the process of folding the folding bracket 4, the backrest 2 and the seat 1 can be folded in half, and then the backrest 2 and the seat can be folded. The seats 1 are folded together on the chassis support 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 , and the bottom end of the second folding arm 612 passes through the second pivot The connecting shaft 636 is pivotally connected to the main casing 6311 of the casing 631 , and the top end of the first folding arm 611 and the top end of the second folding arm 612 are respectively 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, and the first folding arm 611 is movably accommodated in the first groove in the slot. Therefore, 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 and the chair during the rotation and folding process The seat 1 is parallel or substantially parallel, 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, thereby facilitating 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 reduced to the position of the seat 1 of the wheelchair, which is beneficial to reduce the space occupied by the wheelchair after folding , which can make the folded structure more compact. By covering the first folding arm 611 with the first groove, in addition to enhancing the stability of the support structure and improving the compactness of the structure, it is also beneficial to improve the overall appearance of the product.

Further, the first folding arm 611 and the second folding arm 612 are connected to the armrest body 62 through 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 fixed on the bottom surface of the connecting plate 641. The connecting plate 641 can be Removably installed on the bottom of the armrest body 62 , the first folding arm 611 is pivotally connected to the first pivot plate 642 , and the second folding arm 612 is pivotally connected to the second pivot 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 The second groove extending along its length direction, the second and second pivot plates 643 are accommodated in the second groove, thus, the first folding arm 611 and the second folding arm 612 are rotated and folded to realize the armrest body When the height of the armrest 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 substantially 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 half-waist-shaped, and the first folding arm 611 and the second folding arm 612 are arranged opposite to each other. The first groove on the two folding arms 612 covers the first folding arm 611, and the second groove on the first folding arm 611 covers the second pivot plate 643, which is beneficial to the first folding arm 611 and the second folding arm 611. During the rotation and folding process, the folding arms 612 can achieve relative movement with each other to ensure smooth rotation and folding, and this structure can also improve the overall appearance of the folding arms 61 . In addition, the bottom of the armrest body 62 is provided with at least one row of mounting holes 621, and the connecting plate 641 of the support 64 is provided with at least two through holes 6411. The detachable connection between the support 64 and the folding arm 61 and the armrest body 62 can be realized, and then the armrest body 62 can be adjusted as required. , to better meet user needs. Moreover, the interior of the armrest body 62 in this embodiment is hollow, and a through opening can be provided on the side of the armrest body, and the 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 in this embodiment can be an electric wheelchair, see FIGS. 1 and 2 . Specifically, a control board 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 armrest body 62 to control the The box 16 can be provided with a rocker and various control buttons for controlling the wheelchair to move forward or backward. The intermediate brackets 321 on both sides of the wheelchair can be respectively inserted with the battery 17. The above-mentioned rear moving wheel 10 is connected with a drive motor 18. The drive motor 18 , the control box 16 and the battery 17 are respectively electrically connected to the control board 12, whereby the control board 12 can control the drive motor 18 according to the settings of the control box 16, so as to control the movement of the wheelchair.

Specifically, the folding process of the wheelchair in this embodiment can be as follows: first pull the movable handle 81 of the above-mentioned fastener 8 to release the fastener 8 from the clamping plate 411 , and then pull the pull wire 72 of the latch device 7 to make the latch device The latch body 71 of 7 is retracted from the engaging recess of the upper folding support rod 41 and the perforation of the first support plate 421, and then the rocker arm 634 of the folding locking mechanism 63 is pressed down, so that the armrest device 6 is folded on the seat 1, Afterwards, the backrest 2 is pressed down to make the upper folding support rod 41 and the folding plate frame 5 rotate and fold, so that the backrest 2 and the seat 1 are superimposed on the chassis frame 3, thus completing the folding of the wheelchair. The rotation and folding directions of the various parts of the wheelchair can be specifically shown by the arrows in FIG. 3 .

Specifically, the unfolding process of the wheelchair in this embodiment can be as follows: lift the backrest 2 and the seat 1 so that the engaging recess of the upper folding support rod 41 is aligned with the above-mentioned perforation of the first support plate 421 , and then the latching pin of the latching device 7 is aligned. Under the action of the spring, the main body 71 is snapped into the perforation and the snap-fit recess to realize 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 fastener 8 to make the fastener 8 is fastened on the card board 411, so that the folding and unfolding of the wheelchair can be completed.

To sum up, the wheelchair of this embodiment realizes the folding and unfolding of the wheelchair through the folding mechanism composed of the folding bracket 4 and the folding plate frame 5, etc., and realizes the fixing of the wheelchair after unfolding through the latch device 7, and also realizes the folding and unfolding of the wheelchair through the fasteners. 8. The stabilization mechanism constituted by the clamping plate 411 and the clamping post 424 can improve the stability of the wheelchair after unfolding, so as to avoid the wheelchair from shaking. In addition, the armrest device 6 in this embodiment can be folded and lifted independently. The 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 terms "first", "second", etc. are used to describe various information in the present invention, but the 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, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information without departing from the scope of the present invention.

The above is the preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and deformations can also be made. These improvements and deformations It is also regarded as the protection scope of the present invention.

Claims (13)

1. a kind of Zeng Wen mechanism of wheelchair, which is characterized in that including upper folding strut and lower folding strut, the upper folding strut It is articulated with the lower folding strut, and the upper folding strut is equipped with snap-gauge, the lower folding strut is connected with card column, described Lower folding strut or the card column are connected with fastener, and the fastener compresses the snap-gauge and being fastened on the snap-gauge In the card column.

2. the Zeng Wen mechanism of wheelchair according to claim 1, which is characterized in that the snap-gauge is along the upper folding strut Extending direction setting, the card column make the snap-gauge when fastening perpendicular to the plane where the snap-gauge, the fastener Bottom end is pressed in the card column.

3. the Zeng Wen mechanism of wheelchair according to claim 2, which is characterized in that the bottom end of the snap-gauge is equipped with and the card The card slot that the outer peripheral surface of column matches.

4. the Zeng Wen mechanism of wheelchair according to claim 3, which is characterized in that be socketed in the card column and the card slot Compatible sleeve gasket.

5. the Zeng Wen mechanism of wheelchair according to any one of claims 1 to 4, which is characterized in that the lower folding strut packet Main rod body, the first supporting plate and the second supporting plate are included, first supporting plate and second supporting plate are set to the top of the main rod body, And first supporting plate and second supporting plate are arranged in parallel, and peace is formed between first supporting plate and second supporting plate Tankage, the upper folding strut are protruded into the mounting groove and are articulated with the lower folding strut.

6. the Zeng Wen mechanism of wheelchair according to claim 5, which is characterized in that the card column is connected to first supporting plate Between second supporting plate, and the card column is located at the side of the main rod body.

7. the Zeng Wen mechanism of wheelchair according to claim 5, which is characterized in that the fastener includes press block, connecting rod And spring, the press block are slidably connected to the connecting rod, the connecting rod is connected to the card column, and the connecting rod can be with The card column is that shaft is rotated around the card column, and the spring is connected between the press block and the card column.

8. the Zeng Wen mechanism of wheelchair according to claim 7, which is characterized in that the top of the connecting rod is connected with movable handle Hand.

9. the Zeng Wen mechanism of wheelchair according to claim 7, which is characterized in that the card column can turn around center axis Dynamic, the connecting rod fixation is plugged in the card column, and the connecting rod and the card column are perpendicular.

10. the Zeng Wen mechanism of wheelchair according to claim 7, which is characterized in that the top of the snap-gauge is equipped with Ka Jiao, and The Ka Jiao is set as rounded corner.

11. the Zeng Wen mechanism of wheelchair according to claim 7, which is characterized in that the snap-gauge is set as two, described in two Snap-gauge is set in the mounting groove and is parallel to each other, and the appearance for accommodating the connecting rod is formed between two snap-gauges Receive slot.

12. the Zeng Wen mechanism of wheelchair according to claim 5, which is characterized in that be equipped with bolt on first supporting plate Device, the bolt device include latch body, and first supporting plate is equipped with perforation, and the upper folding strut is equipped with engaging Recess, the latch body are telescopically inserted in the perforation and the engaging recess.

13. a kind of wheelchair, which is characterized in that including seat, under(-)chassis and such as the described in any item increasings of claim 1 to 12 Steady mechanism, the upper top for folding strut are connected with the seat, and the lower folding strut is fixedly supported to the bottom On frame.