Wheelchair with secondary folding hitching leg structure

Abstract

The utility model discloses a wheelchair with a secondary folding hitching leg structure, which comprises a pair of hitching legs arranged at the front end of a wheelchair framework, each hitching leg is provided with a pedal which faces the outer side of the wheelchair and performs primary folding through rotation, and the hitching legs are rotatably fixed on the wheelchair framework. And the hitching legs can be overturned towards the direction of the wheelchair to implement secondary folding. A rotary limiting arc is arranged in a connecting joint of the hitching leg and the framework, and a pin shaft type fixing structure is matched, so that the functions of secondary folding of the hitching leg of the wheelchair and quick release of the hitching leg are synchronously realized.

Description

Technical Field

[0001] The utility model relates to the field of wheelchairs, in particular to a wheelchair with a secondary folding foot hanging structure. Background Art

[0002] Chinese invention patent publication number CN107049632B shows a conventional wheelchair, in which the footrests at the front end of the wheelchair can only be lifted outwards to be folded and stored once, and the wheelchair still occupies a large volume after being folded. Utility Model Content

[0003] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0004] A wheelchair with a secondary folding hanging leg structure includes a pair of hanging legs arranged at the front end of the wheelchair frame, the hanging legs having pedals that are folded once toward the outside of the wheelchair by rotating joints, and the hanging legs are rotatably installed on the wheelchair frame so that the hanging legs can be flipped toward the direction of the wheelchair for secondary folding.

[0005] In a preferred embodiment of the present invention, the rotation joint is a first rotation joint having a rotary limiting structure, and the hanging leg is connected to the wheelchair frame via the first rotation joint.

[0006] In a preferred embodiment of the present invention, the first rotating joint includes a connecting seat arranged at the front end of the wheelchair frame and a limiting step arranged on the side of the hanging rod facing the wheelchair frame, which rotates synchronously with the hanging rod and is coupled to the connecting seat. A limiting surface is arranged in the connecting seat. When the limiting step moves with the hanging rod, the limiting surface blocks the limiting step from two directions, forming two end points on the folding stroke of the hanging rod.

[0007] In a preferred embodiment of the present invention, a circumferential transfer groove is provided in the connecting seat, the limiting surface is located on the side wall surface of the transfer groove, and the limiting step is fan-shaped.

[0008] In a preferred embodiment of the present invention, the hanging legs are fixedly connected via a pin structure in the first rotation joint.

[0009] In a preferred embodiment of the present invention, the pin structure is fixed by bolts or screws and nuts provided at both ends.

[0010] In a preferred embodiment of the present invention, it further comprises a second rotation joint for rotationally connecting the pedal to the hanging foot.

[0011] In a preferred embodiment of the present invention, a boss is arranged on the upper surface of the pedal, and the boss serves as a contact fulcrum when the pedal is folded and retracted through the second rotation joint to prevent the second rotation joint from being overloaded.

[0012] The beneficial effects of the present invention are:

[0013] The wheelchair with a secondary folding foot hanging structure provided by the utility model arranges a rotation limit arc in the connection joint between the foot hanging and the frame, and cooperates with a pin-type fixing structure to simultaneously realize the secondary folding and quick-release functions of the wheelchair foot hanging. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0015] Figure 1 It is a schematic diagram of the overall structure of the wheelchair of the present invention.

[0016] Figure 2 yes Figure 1 Enlarged view of part A (first folded state).

[0017] Figure 3 yes Figure 2 Schematic diagram of another perspective in this state.

[0018] Figure 4 It is the explosion of the first revolute joint Figure 1 .

[0019] Figure 5 It is the explosion of the first revolute joint Figure 2 .

[0020] Figure 6 This is a diagram of the pedals. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings. The above description is simplified for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it cannot be understood as a limitation on the present invention.

[0022] As used in this specification, the singular forms "a," "an," "said," and "the" include the plural forms unless otherwise expressly stated. The terms "include," "comprise," and "contain" as used in this specification indicate the presence of the claimed features, but do not exclude the presence of one or more additional features. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0023] In the specification, when an element is referred to as being “on,” “fixed” to, “connected to,” “engaged to,” or the like, the element may be directly on, fixed to, connected to, engaged to, or contacting the other element, or intervening elements may be present.

[0024] It will be understood that although the terms "first," "second," etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Thus, a first element may be referred to as a second element without departing from the teachings of the present invention.

[0025] The following describes exemplary embodiments of the present application with reference to the accompanying drawings. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments. In all figures, the same reference numerals represent the same elements or elements with the same function.

[0026] Figures 1 to 3 The overall structure of a quick-release wheelchair is shown. The hanging leg 30 is pivotally connected to the front end of the frame 10 via a first pivot joint 40. The hanging leg 30 includes a hanging rod 32 connected to the first pivot joint 40 and a footrest 31 disposed at a second end 33 and secured by a second pivot joint 50. The first pivot joint 40 allows the hanging leg 30 to be folded a second time toward the wheelchair 1, further reducing the wheelchair's volume when folded.

[0027] refer to Figure 4 and Figure 5The first rotation joint 40 includes a connecting seat 11 located at the front end of the skeleton 10 and a limiting step 33 provided on the side of the first end 33 facing the skeleton 10. The hanging rod 32 is specifically hinged to the connecting seat 11 through the through hole 16 via a pin structure. In addition, it can also be fixed by a quick-release shaft 36 or screws, bolts, etc. Furthermore, a transposition groove 12 is provided on the connecting seat 11. The transposition groove 12 is a circular groove as a whole. The extension of its side wall surface 15 forms a virtual circumference with the through hole 16 as the center of the circle. A first limiting surface 13 and a second limiting surface 14 are provided opposite to each other in the extension direction of the side wall surface 15. The first limiting surface 13 and the second limiting surface 14 constitute the starting point and the end point of the extension direction of the side wall surface 15. The limiting step 33 is installed in the transposition groove 12 along with the hanging rod 32. When the hanging foot 30 flips upward, the limiting step 33 rotates in the cavity formed by the transposition groove 12. When the hanging leg 30 is flipped to the uppermost end and stored under the seat cushion 20, the second step surface 33b of the limiting step 33 contacts the second limiting surface 14 at the end of the side wall surface 15 to form a restriction; when the hanging leg 30 is flipped to the lowermost end, the first step surface 33a contacts the first limiting surface 13 to form a restriction.

[0028] In one embodiment, the cross-section of the limiting step 33 is fan-shaped, and the outer arc surface 33c on the outside matches the side wall surface 15. The first step surface 33a and the second step surface 33b are respectively two oblique side surfaces of the fan. Since the hanging foot 30 is used for the passenger to step on after being fully unfolded, this integrated structure is conducive to improving the overall strength of the limiting step 33.

[0029] refer to Figure 6 A boss 31a is provided on the upper surface of the pedal 31. When the pedal 31 is folded outward through the second rotating joint 50, the boss 31a contacts the hanging rod 32 to form a stop point. This prevents the second rotating joint 50 from being overloaded and deformed due to the lever effect, thereby extending its service life.

Claims

1. A wheelchair with a secondary folding footrest structure, comprising a pair of footrests arranged at the front end of the wheelchair frame, wherein the footrests have pedals that are folded toward the outside of the wheelchair by rotating joints, characterized in that: The hanging legs are rotatably mounted on the wheelchair frame so that the hanging legs can be turned toward the wheelchair to implement secondary folding.

2. The wheelchair with a secondary folding foot hanging structure according to claim 1, characterized in that: The rotation joint is a first rotation joint with a rotary limiting structure, and the hanging leg is connected to the wheelchair frame via the first rotation joint.

3. The wheelchair with a secondary folding foot hanging structure according to claim 2, characterized in that: The first rotating joint includes a connecting seat arranged at the front end of the wheelchair frame and a limiting step arranged on the side of the hanging rod facing the wheelchair frame, which rotates synchronously with the hanging rod and is coupled to the connecting seat. A limiting surface is arranged in the connecting seat. When the limiting step moves with the hanging rod, the limiting surface blocks the limiting step from two directions, forming two end points on the folding stroke of the hanging rod.

4. The wheelchair with a secondary folding foot hanging structure according to claim 3, characterized in that: A circumferential transfer groove is provided in the connecting seat, the limiting surface is located on the side wall surface of the transfer groove, and the limiting step is fan-shaped.

5. The wheelchair with a secondary folding foot hanging structure according to claim 2, characterized in that: The hanging legs are fixedly connected via a pin structure in the first rotating joint.

6. The wheelchair with a secondary folding foot hanging structure according to claim 5, characterized in that: The pin structure is specifically fixed by bolts or screws and nuts arranged at both ends.

7. The wheelchair with a secondary folding foot hanging structure according to any one of claims 1 to 6, characterized in that: It also includes a second rotation joint that rotationally connects the pedal to the hanging foot.

8. The wheelchair with a secondary folding foot hanging structure according to claim 7, characterized in that: A boss is arranged on the upper surface of the pedal, and the boss serves as a contact fulcrum when the pedal is folded and retracted by the second rotation joint to prevent the second rotation joint from being overloaded.

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