Wheelchair single pedal structure

Abstract

The single-pedal structure of the wheelchair comprises a chassis welding frame, a pedal plate, an inclined supporting rod and a sliding sleeve, the chassis welding frame is used for being connected with a wheelchair frame, the projection of the chassis welding frame in the vertical direction is in a square shape, and the chassis welding frame comprises a front transverse rod, a rear transverse rod and side rods located on the two sides; the pedal plate is arranged at the front lower part of the front cross rod, and the number of the pedal plate is only one; the inclined supporting rod is connected to the middle of the front transverse rod and obliquely extends towards the lower front portion, the inclined supporting rod is sleeved with the sliding sleeve in a sliding mode, the pedal is connected to the sliding sleeve, and when the sliding sleeve slides along the inclined supporting rod, the pedal can be driven to slide to achieve lifting of the pedal. The single-pedal structure of the wheelchair is simple in overall structure, exquisite, small and exquisite, good in attractiveness and high in senility.

Description

Technical Field

[0001] The utility model belongs to the technical field of wheelchairs, and in particular relates to a wheelchair single-pedal structure. Background Art

[0002] Electric wheelchairs are the main means of transportation for people with mobility impairments. In order to facilitate the placement of feet, they are usually provided with a footrest structure. Existing footrest structures are divided into two categories. One is a double-pedal structure with two independent footrests. The footrests of this structure are located on both sides and close to the side brackets of the wheelchair. They can be conveniently connected to the side brackets of the wheelchair through a telescopic structure to change the height of the footrests. For example, Chinese patent CN206687846U discloses such a wheelchair footrest structure. However, since the user's two feet are placed on the two footrests respectively, the user does not feel stable. At the same time, due to the telescopic characteristics, the heights of the two footrests are prone to inconsistency, which affects the comfort of use. The other is a single-pedal structure with only one footrest. The footrest of this structure is located in the middle and is mostly non-retractable. For example, Chinese patents CN107714324A, CN113143612B, and CN209662010U disclose such structures. Since the height of the footrest is difficult to adjust, the structure is difficult to adapt to users of different heights and leg lengths, and its scope of application is limited. There are also single-pedal structures with telescopic functions. For example, Chinese patent CN214967924U discloses an adjustable wheelchair footrest. This solution drives the footrest to rise and fall through the action of a lifting mechanism, but the lifting mechanism includes a guide block, a guide rod, a fixed seat, and a telescopic rod. These components are stacked at the wheelchair footrest, which not only makes the structure of the wheelchair footrest more complicated and costly, but also brings a strong sense of bloat in appearance and poor aesthetics. Utility Model Content

[0003] The purpose of the utility model is to overcome one or more shortcomings in the prior art and to provide a wheelchair single-pedal structure.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the wheelchair single pedal structure includes:

[0005] A chassis welding frame for connecting to the wheelchair frame, wherein the projection of the chassis welding frame in the vertical direction is in the shape of a square, and the chassis welding frame includes a front cross bar, a rear cross bar, and side bars located on both sides;

[0006] A foot pedal is provided at the front lower part of the front crossbar, and there is only one foot pedal;

[0007] The wheelchair single-pedal structure also includes a diagonal support rod and a sliding sleeve. The diagonal support rod is connected to the middle part of the front cross bar and extends obliquely forward and downward. The sliding sleeve is slidably mounted on the diagonal support rod. The foot pedal is connected to the sliding sleeve. When the sliding sleeve slides along the diagonal support rod, it can drive the foot pedal to rise and fall.

[0008] Preferably, a locking mechanism for locking the relative positions of the sliding sleeve and the diagonal support rod is provided between the sliding sleeve and the diagonal support rod.

[0009] Further preferably, the locking mechanism includes a locking hole opened on the rear surface of the diagonal support rod, a docking hole opened on the rear surface of the sliding sleeve, and a locking pin. There are multiple locking holes and they are evenly spaced along the extension direction of the diagonal support rod. The aperture of the docking hole is greater than or equal to the aperture of the locking hole. The axis of the docking hole is located in the same plane as the axis of all the locking holes. The locking pin is used to insert into the docking hole and the locking hole to lock the locking mechanism.

[0010] Further preferably, the edge of the docking hole is coaxially connected with an annular boss protruding backward, and the locking pin is pluggable and arranged in the annular boss. When the locking pin passes through the docking hole and is inserted into the locking hole, the locking mechanism is locked, and the relative position of the sliding sleeve and the diagonal support rod remains locked. When the locking pin is disengaged from the locking hole, the locking mechanism is unlocked, and the sliding sleeve can slide along the diagonal support rod.

[0011] Further preferably, the locking pin is in the shape of a stepped shaft with one end larger than the other end, the large end of the locking pin is located behind the annular boss, the diameter of the large end of the locking pin is greater than or equal to the aperture of the docking hole, the length of the small end of the locking pin is greater than the wall thickness of the sliding sleeve, and the diameter of the small end of the locking pin is less than or equal to the aperture of the locking hole.

[0012] Further preferably, when the locking pull pin is inserted into the annular boss, the outer wall of the locking pull pin is threadedly connected to the inner wall of the annular boss.

[0013] Preferably, the sliding sleeve includes an aluminum alloy hollow cylinder located in the middle and plastic sleeves connected to both ends of the cylinder. When the sliding sleeve is mounted on the diagonal support rod, there is a gap between the inner wall of the cylinder and the outer wall of the diagonal support rod. The plastic sleeve is connected to a skirt extending toward the middle of the cylinder, and the skirt is inserted and squeezed into the gap.

[0014] Further preferably, a snap-in hole is provided on the rear surface of the cylinder, and a buckle is provided on the skirt. When the plastic sleeve is pressed against the end of the cylinder, the buckle is snapped into the snap-in hole to lock the relative position of the plastic sleeve and the cylinder.

[0015] Preferably, the front surface of the cylinder is provided with a hinge seat extending forward, and the rear end of the foot pedal is provided with a support ear extending backward. The support ear is attached to both sides of the hinge seat and is rotatably connected to the hinge seat through a pin shaft passing through the support ear and the hinge seat.

[0016] Further preferably, the lower end portion of the hinge seat extends forward to form a support platform, and when the foot pedal is connected to the sliding sleeve, the support platform is supported below the foot pedal and fits against the lower surface of the foot pedal.

[0017] Further preferably, the rear end portion of the upper surface of the foot pedal is further provided with an upwardly folded edge, the edge extending backward along the edge of the foot pedal until it is connected to the support ear, and the edge is provided with a weight reduction hole for reducing weight.

[0018] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0019] The single-pedal structure of a wheelchair provided by the utility model comprises: a chassis welding frame, a footrest, an oblique support rod and a sliding sleeve, wherein the chassis welding frame is used to connect the wheelchair frame, the projection of the chassis welding frame in the up and down directions is in the shape of a U, and the chassis welding frame comprises a front cross bar, a rear cross bar and side bars located on both sides; the footrest is arranged at the front lower part of the front cross bar, and there is only one footrest; by connecting the oblique support rod to the middle part of the front cross bar and extending obliquely forward and downward, the sliding sleeve can be slidably mounted on the oblique support rod, and the footrest is connected to the sliding sleeve. When the sliding sleeve slides along the oblique support rod, it can drive the footrest to slide to realize the lifting of the footrest. The overall structure of the single-pedal structure of the wheelchair is simple, exquisite and compact, beautiful and high-end. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a main schematic diagram of a preferred embodiment of the utility model.

[0021] Figure 2 yes Figure 1 Assembly explosion diagram.

[0022] Figure 3 yes Figure 1 Schematic diagram of the longitudinal section, at this time, the pedal is in the second lowest gear.

[0023] Figure 4 yes Figure 1 Schematic diagram of the longitudinal section, at this time, the pedal is compared with Figure 3 Up two gears.

[0024] Figure 5 yes Figure 3 A local enlarged schematic diagram of point A in the middle.

[0025] Among them: 10. Chassis welding frame; 11. Front crossbar; 12. Rear crossbar; 13. Sidebar; 20. Footboard; 21. Support ear; 22. Surrounding edge; 221. Weight-reducing hole; 30. Diagonal support rod; 40. Sliding sleeve; 41. Cylinder; 411. Gap; 412. Snap-on hole; 413. Articulated seat; 414. Support platform; 42. Plastic sleeve; 421. Skirt; 422. Buckle; 51. Locking hole; 52. Docking hole; 521. Annular boss; 53. Locking pin. DETAILED DESCRIPTION

[0026] like Figures 1 to 5 As shown, the single-pedal structure of a wheelchair provided by the present invention includes: a chassis welding frame 10, a footrest 20, a diagonal support rod 30 and a sliding sleeve 40, wherein the chassis welding frame 10 is used to connect the wheelchair frame, and the projection of the chassis welding frame 10 in the up and down directions is in the shape of a U.S. character. The chassis welding frame 10 includes a front cross bar 11, a rear cross bar 12 and side rods 13 on both sides; the footrest 20 is arranged at the front and lower part of the front cross bar 11, and there is only one footrest 20; the diagonal support rod 30 is connected to the middle part of the front cross bar 11 and extends obliquely forward and downward, the sliding sleeve 40 can be slidably mounted on the diagonal support rod 30, and the footrest 20 is connected to the sliding sleeve 40. When the sliding sleeve 40 slides along the diagonal support rod 30, it can drive the footrest 20 to slide to realize the lifting of the footrest 20. The overall structure of the single-pedal structure of the wheelchair is simple, exquisite and compact, beautiful and high-end.

[0027] In order to provide support for the user's feet, in this embodiment, a locking mechanism is provided between the sliding sleeve 40 and the diagonal support rod 30 for locking the relative position of the sliding sleeve 40 and the diagonal support rod 30. Furthermore, the locking mechanism includes a locking hole 51 opened on the rear surface of the diagonal support rod 30, a docking hole 52 opened on the rear surface of the sliding sleeve 40, and a locking pin 53. There are multiple locking holes 51 and they are evenly spaced along the extension direction of the diagonal support rod 30. The aperture of the docking hole 52 is greater than or equal to the aperture of the locking hole 51. The axis of the docking hole 52 is located in the same plane as the axis of all the locking holes 51. The locking pin 53 is used to insert into the docking hole 52 and the locking hole 51 to lock the locking mechanism.

[0028] To facilitate the insertion and removal of the locking pin 53, a rearward-protruding annular boss 521 is coaxially connected to the edge of the docking hole 52, and the locking pin 53 is pluggable and arranged in the annular boss 521. When the locking pin 53 passes through the docking hole 52 and is inserted into the locking hole 51, the locking mechanism is locked, and the relative position of the sliding sleeve 40 and the diagonal support rod 30 remains locked. When the locking pin 53 is disengaged from the locking hole 51, the locking mechanism is unlocked, and the sliding sleeve 40 can slide along the diagonal support rod 30.

[0029] Furthermore, the locking pin 53 is in the shape of a stepped shaft with one end larger than the other end. The large end of the locking pin 53 is located behind the annular boss 521. The diameter of the large end of the locking pin 53 is greater than or equal to the aperture of the docking hole 52. The length of the small end of the locking pin 53 is greater than the wall thickness of the sliding sleeve 40. The diameter of the small end of the locking pin 53 is less than or equal to the aperture of the locking hole 51.

[0030] Furthermore, when the locking pin 53 is inserted into the annular boss 521, the outer wall of the locking pin 53 is threadedly connected to the inner wall of the annular boss 521. The advantage of this arrangement is that after the sliding sleeve 40 aligns the docking hole 52 with the locking hole 51, the locking mechanism can be locked by tightening the locking pin 53. At the same time, the locking pin 53 can also be locked on the annular boss 521 to prevent the locking pin 53 from falling and being lost.

[0031] In this embodiment, the sliding sleeve 40 includes an aluminum alloy hollow cylinder 41 located in the middle and a plastic sleeve 42 connected to both ends of the cylinder 41. When the sliding sleeve 40 is sleeved on the diagonal support rod 30, a gap 411 is provided between the inner wall of the cylinder 41 and the outer wall of the diagonal support rod 30. The plastic sleeve 42 is connected to a skirt 421 extending toward the middle of the cylinder 41. The skirt 421 is inserted and squeezed into the gap 411.

[0032] Preferably, a snap-fit ​​hole 412 is provided on the rear surface of the cylinder 41, and a buckle 422 is provided on the skirt 421. When the plastic sleeve 42 is pressed against the end of the cylinder 41, the buckle 422 is snapped into the snap-fit ​​hole 412, locking the relative position of the plastic sleeve 42 and the cylinder 41.

[0033] In this embodiment, the front surface of the cylinder 41 is provided with a hinge seat 413 extending forward, and the rear end of the foot pedal 20 is provided with a support ear 21 extending backward. The support ear 21 is attached to both sides of the hinge seat 413 and is rotatably connected to the hinge seat 413 through a pin shaft (not shown in the figure) passing through the support ear 21 and the hinge seat 413.

[0034] Furthermore, the lower end of the hinged seat 413 extends forward to form a support platform 414. When the foot pedal 20 is connected to the sliding sleeve 40, the support platform 414 is supported under the foot pedal 20 and fits with the lower surface of the foot pedal 20. Furthermore, the rear end of the upper surface of the foot pedal 20 is also provided with an upward folded edge 22. The edge 22 extends backward along the edge of the foot pedal 20 until it is connected to the support ear 21. A weight reduction hole 221 is provided on the edge 22 for reducing weight.

[0035] The single-pedal structure of this wheelchair has a pedal height adjustment function, which can adapt to people of different heights. Multiple locking holes can form multiple gears. The adjustment of each gear is fixed by a locking pin. When adjustment is required, the height of the pedal can be adjusted by manually pulling the locking pin.

[0036] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A wheelchair single pedal structure, comprising: A chassis welding frame for connecting to the wheelchair frame, wherein the projection of the chassis welding frame in the vertical direction is in the shape of a square, and the chassis welding frame includes a front cross bar, a rear cross bar, and side bars located on both sides; A foot pedal is provided at the front lower part of the front crossbar, and there is only one foot pedal; Its characteristics are: The wheelchair single-pedal structure also includes a diagonal support rod and a sliding sleeve. The diagonal support rod is connected to the middle part of the front cross bar and extends obliquely forward and downward. The sliding sleeve is slidably mounted on the diagonal support rod. The foot pedal is connected to the sliding sleeve. When the sliding sleeve slides along the diagonal support rod, it can drive the foot pedal to rise and fall.

2. The wheelchair single-pedal structure according to claim 1, characterized in that: A locking mechanism for locking the relative positions of the sliding sleeve and the diagonal support rod is provided between the sliding sleeve and the diagonal support rod.

3. The wheelchair single-pedal structure according to claim 2, characterized in that: The locking mechanism includes a locking hole opened on the rear surface of the diagonal support rod, a docking hole opened on the rear surface of the sliding sleeve, and a locking pin. There are multiple locking holes and they are evenly spaced along the extension direction of the diagonal support rod. The aperture of the docking hole is greater than or equal to the aperture of the locking hole. The axis of the docking hole and the axis of all the locking holes are located in the same plane. The locking pin is used to insert into the docking hole and the locking hole to lock the locking mechanism.

4. The wheelchair single-pedal structure according to claim 3, characterized in that: The edge of the docking hole is coaxially connected with an annular boss protruding backward, and the locking pin is pluggable and arranged in the annular boss. When the locking pin passes through the docking hole and is inserted into the locking hole, the locking mechanism is locked, and the relative positions of the sliding sleeve and the diagonal support rod remain locked. When the locking pin is disengaged from the locking hole, the locking mechanism is unlocked, and the sliding sleeve can slide along the diagonal support rod.

5. The wheelchair single-pedal structure according to claim 4, characterized in that: The locking pin is in the shape of a stepped shaft with one end larger than the other end. The large end of the locking pin is located behind the annular boss. The diameter of the large end of the locking pin is greater than or equal to the aperture of the docking hole. The length of the small end of the locking pin is greater than the wall thickness of the sliding sleeve. The diameter of the small end of the locking pin is less than or equal to the aperture of the locking hole.

6. The wheelchair single-pedal structure according to claim 5, characterized in that: When the locking pin is inserted into the annular boss, the outer wall of the locking pin is threadedly connected to the inner wall of the annular boss.

7. The wheelchair single-pedal structure according to claim 1, characterized in that: The sliding sleeve includes an aluminum alloy hollow cylinder located in the middle and plastic sleeves connected to both ends of the cylinder. When the sliding sleeve is mounted on the diagonal support rod, a gap is formed between the inner wall of the cylinder and the outer wall of the diagonal support rod. The plastic sleeve is connected to a skirt extending toward the middle of the cylinder, and the skirt is inserted and squeezed into the gap.

8. The wheelchair single-pedal structure according to claim 7, characterized in that: A snap-fit ​​hole is provided on the rear surface of the cylinder, and a buckle is provided on the skirt. When the plastic sleeve is pressed against the end of the cylinder, the buckle is snapped into the snap-fit ​​hole to lock the relative position of the plastic sleeve and the cylinder.

9. The wheelchair single-pedal structure according to claim 7, characterized in that: The front surface of the cylinder is provided with a hinge seat extending forward, and the rear end of the foot pedal is provided with a support ear extending backward. The support ear is fitted on both sides of the hinge seat and is rotatably connected to the hinge seat through a pin shaft passing through the support ear and the hinge seat.

10. The wheelchair single-pedal structure according to claim 9, characterized in that: The lower end portion of the hinge seat extends forward to form a support platform. When the foot pedal is connected to the sliding sleeve, the support platform is supported below the foot pedal and fits against the lower surface of the foot pedal.

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