Pedal folding and overturning mechanism for wheelchair

Abstract

The utility model discloses a pedal folding turnover mechanism for a wheelchair, which is arranged on a frame of the wheelchair and comprises a turnover upper part, a turnover lower part and a turnover plate, the turnover upper part is hinged on the frame, and the turnover upper part is at least provided with a first state position and a second state position relative to the frame in the turnover process. A first limiting mechanism for limiting the turnover upper part at a first state position and a second limiting mechanism for limiting the turnover upper part at a second state position are arranged between the turnover upper part and the frame; the lower overturning part is hinged to the upper overturning part, the lower overturning part is at least provided with a third state position relative to the upper overturning part in the overturning process, the double feet can be placed on the lower overturning part, the legs can be placed on the lower overturning part in the sleeping posture state in an overturning mode, the comfort of a user is improved, and the use flexibility is improved.

Description

Technical Field

[0001] The utility model relates to a foot pedal folding and turning mechanism for a wheelchair, belonging to the technical field of wheelchairs. Background Art

[0002] At present, with the development of social welfare and the improvement of people's living standards, more and more disabled people and the elderly are using electric wheelchairs. Wheelchairs have become an indispensable means of transportation for people with lower limb disabilities and the elderly and infirm. More and more requirements have been put forward for electric wheelchairs, such as folding wheelchairs that are easy to store and carry, lying on the back of the wheelchair can relieve the fatigue of the user sitting for a long time, and the footrest is also an important part of the wheelchair, where the feet are placed when sitting in a wheelchair. After searching, it was found that the Chinese patent with publication number CN201930162U disclosed a wheelchair footrest. In this patent, when sitting in a wheelchair, the feet are placed on the footrest, and the outer side block contacts the outer side of the bottom plate, increasing the contact area and keeping the bottom plate stable; the inner side block and the rear side block restrict the patient's feet to enter and exit only from the front of the bottom plate, preventing the feet from sliding out from the side and back, and the L-shaped steel sheet is screwed and fixed to the rear side block and the bottom plate, making the entire structure more solid and ensuring the safety of the patient, but the footrest in this patent can only be used to place the feet and has no other uses. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a footrest folding and flipping mechanism for a wheelchair, which can not only place the feet but also flip the pedal in a sleeping state so that the legs can be placed thereon, thereby improving the comfort of the user and increasing the flexibility of use.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a pedal folding and flipping mechanism for a wheelchair, which is installed on the frame of the wheelchair, comprising:

[0005] A flip upper part, the flip upper part is hinged on the frame, the flip upper part has at least a first state position and a second state position relative to the frame during the flipping process, and a first limiting mechanism for limiting the flip upper part in the first state position and a second limiting mechanism for limiting the flip upper part in the second state position are provided between the flip upper part and the frame;

[0006] A flip lower part, the flip lower part is hinged on the flip upper part, the flip lower part has at least a third state position relative to the flip upper part during the flipping process, and a third limiting mechanism for limiting the flip lower part in the third state position is provided between the flip lower part and the flip upper part;

[0007] A flip plate is hinged on the flip lower part.

[0008] Furthermore, in order to prevent the flip plate from over-flipping during the flipping process, the flip plate has at least a fourth state position and a fifth state position relative to the flip lower part during the flipping process, and a flip plate limiting mechanism for limiting the flip plate to the fifth state position is provided between the flip plate and the flip lower part.

[0009] Furthermore, a flip plate locking mechanism for locking the flip plate in a fourth state position is provided between the flip plate and the flip lower part.

[0010] Furthermore, in order to lock the flip plate, the flip plate locking mechanism includes a locking groove and a locking hook, the locking groove is arranged on the flip plate, the locking hook is movably arranged on the flip lower part, and the locking hook is suitable for engaging with the locking groove when the flip plate is locked in the fourth state position.

[0011] Further, in order to unlock the flip plate, the flip plate locking mechanism further includes a locking button, a connecting shaft and a torsion spring, the locking button is movably mounted on the flip lower part, and the locking hook abuts against the locking button;

[0012] The locking hook is rotatably connected to the flip lower part via a connecting shaft, the torsion spring is sleeved on the connecting shaft, one end of the torsion spring is connected to the locking hook, and the other end of the torsion spring is connected to the flip lower part or the connecting shaft;

[0013] The locking button is adapted to drive the locking hook to rotate when being pressed so that the locking hook is disengaged from the locking groove.

[0014] Furthermore, the flip limiting mechanism includes a flip limiting surface arranged on the flip plate and a flip abutting surface arranged at the flip lower part, and the flip limiting surface is suitable for abutting against the flip abutting surface when the flip plate flips to the fifth state position to limit the flipping of the flip plate.

[0015] Furthermore, a positioning plate is installed on the frame, and the first limiting mechanism includes a first limiting surface arranged on the positioning plate and a first limiting abutting surface arranged on the flip upper part, and the first limiting surface is suitable for abutting against the first limiting abutting surface when the flip upper part flips to a first state position to limit the flipping of the flip upper part.

[0016] Furthermore, in order to limit the flipping of the flip upper part, a positioning plate is installed on the frame, and the second limiting mechanism includes a limiting assembly, the limiting assembly includes a pin assembly installed on the flip upper part and a positioning groove arranged on the positioning plate, the pin assembly includes a pin, a pin pull rope and a pin spring, the pin is movably installed on the flip upper part, the pin spring is sleeved on the pin, the pin pull rope is suitable for connecting the pin, the two ends of the pin spring respectively abut the pin and the flip upper part, the positioning groove is cooperated with the pin, the pin pull rope is suitable for being pulled to drive the pin to move out of the positioning groove, and the pin is suitable for being embedded in the corresponding positioning groove when the flip upper part flips to the second state position to limit the flipping of the flip upper part.

[0017] Furthermore, the third limiting mechanism includes a third limiting surface arranged on the flip upper part and a third limiting abutting surface arranged on the flip lower part, and the third limiting surface is suitable for abutting against the third limiting abutting surface when the flip lower part flips to the third state position to limit the flipping of the flip lower part.

[0018] Furthermore, in order to assist the flipping of the flip plate, the flip plate is hinged to the flip lower part through a hinge shaft, an elastic member is sleeved on the hinge shaft, and two ends of the elastic member are respectively connected to the flip plate and the flip lower part.

[0019] After adopting the above technical solution, the utility model has the following beneficial effects:

[0020] In the utility model, when not in use, the upper flip part, the lower flip part and the flip plate can be folded and the folding flip mechanism can be folded and flipped and stored under the frame, which can avoid collision and save space.

[0021] In the sitting state, the folding and flipping mechanism is pulled out, at which time the flip upper part is in the first state position, the flip lower part is in the third state position, the flip plate is in the fourth state position, the flip plate footrest surface faces upward, and the user can place both feet on the footrest surface;

[0022] In the sleeping state, the flip upper part is in the second state position, the flip lower part is in the third state position, the flip plate is flipped out to the fifth state position, and the leg support surface of the flip plate faces upward. The user lays the wheelchair flat on the wheelchair, and the user can put his legs on the leg support surface, which improves the user's comfort and increases the flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of a footrest folding and flipping mechanism for a wheelchair of the utility model;

[0024] Figure 2It is a full cross-sectional view of a footrest folding and flipping mechanism for a wheelchair of the utility model;

[0025] Figure 3 It is a three-dimensional diagram of the footrest folding and flipping mechanism of the utility model in the sleeping position;

[0026] Figure 4 It is a full cross-sectional view of the footrest folding and flipping mechanism of the utility model in the sleeping position;

[0027] Figure 5 It is a three-dimensional diagram of the pedal folding and flipping mechanism of the utility model in an unused state;

[0028] Figure 6 It is a structural schematic diagram of the locking mechanism of the utility model. DETAILED DESCRIPTION

[0029] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0030] like Figure 1-6 As shown, a pedal folding and flipping mechanism for a wheelchair is installed on a frame 101 of the wheelchair, comprising:

[0031] The flip upper part 105 is hinged on the frame 101. The flip upper part 105 has at least a first state position and a second state position relative to the frame 101 during the flipping process. A first limiting mechanism for limiting the flip upper part 105 in the first state position and a second limiting mechanism for limiting the flip upper part 105 in the second state position are provided between the flip upper part 105 and the frame 101;

[0032] The flip lower part 106 is hinged on the flip upper part 105. The flip lower part 106 has at least a third state position relative to the flip upper part 105 during the flipping process. A third limiting mechanism for limiting the flip lower part 106 in the third state position is provided between the flip lower part 106 and the flip upper part 105;

[0033] The flip plate 107 is hinged on the flip lower part 106 .

[0034] In this embodiment, the upper flip part 105 and the vehicle frame 101 , the upper flip part 105 and the lower flip part 106 , and the lower flip part 106 and the flip plate 107 are all hinged via a hinge shaft 201 .

[0035] Specifically, Figure 1As shown, the flip plate 107 has at least a fourth state position and a fifth state position relative to the flip lower part 106 during the flipping process, and a flip plate limiting mechanism for limiting the flip plate 107 in the fifth state position is provided between the flip plate 107 and the flip lower part 106.

[0036] In this embodiment, the flip board 107 is provided with a footrest surface 105A and a leg support surface 105B, which are arranged opposite to each other. During the flipping process, the relative position between the flip board 107 and the flip lower part 106 will change, thereby realizing different functions of the flip board. When the flip board 107 is in the fourth state position, the footrest surface 105A faces upward, the leg support surface 105B faces downward, and the footrest surface 105A can be stepped on by the user, thereby realizing functions such as placing and supporting feet. When the flip board 107 is in the fifth state position, the leg support surface 105B faces upward, the footrest surface 105A faces downward, and the leg support surface 105B can be supported by the user's legs, thereby realizing functions such as lying down and resting.

[0037] Specifically, Figure 1 As shown, a flip plate locking mechanism for locking the flip plate 107 in the fourth state position is provided between the flip plate 107 and the flip lower part 106 .

[0038] Specifically, the flip plate locking mechanism includes a locking groove and a locking hook 109. The locking groove is set on the flip plate 107, and the locking hook 109 is movably set on the flip lower part 106. The locking hook 109 is suitable for engaging with the locking groove when the flip plate 107 is locked in the fourth state position.

[0039] Specifically, Figure 6 The flip plate locking mechanism further includes a locking button 108, a connecting shaft 110C and a torsion spring 110B. The locking button 108 is movably mounted on the flip lower portion 106, and the locking hook 109 abuts against the locking button 108;

[0040] The locking hook 109 is rotatably connected to the flip lower part 106 via the connecting shaft 110C, and the torsion spring 110B is sleeved on the connecting shaft 110C. One end of the torsion spring 110B is connected to the locking hook 109, and the other end of the torsion spring 110B is connected to the flip lower part 106 or the connecting shaft 110C.

[0041] The locking button 108 is adapted to drive the locking hook 109 to rotate when being pressed so that the locking hook 109 is separated from the locking groove.

[0042] Specifically, Figure 4 As shown, the flip limiting mechanism includes a flip limiting surface arranged on the flip plate 107 and a flip abutting surface arranged on the flip lower part 106, and the flip limiting surface is suitable for abutting against the flip abutting surface when the flip plate 107 flips to the fifth state position to limit the flipping of the flip plate 107.

[0043] Specifically, Figure 6 As shown, a positioning plate 102 is installed on the frame 101, and the first limiting mechanism includes a first limiting surface arranged on the positioning plate 102 and a first limiting abutting surface arranged on the flip upper part 105, and the first limiting surface is suitable for abutting against the first limiting abutting surface when the flip upper part 105 flips to the first state position to limit the flipping of the flip upper part 105.

[0044] Specifically, Figure 6 As shown, the second limiting mechanism includes a limiting component, which includes a pin assembly installed on the flip upper part 105 and a positioning groove 102A arranged on the positioning plate 102, the pin assembly includes a pin 103, a pin pull rope 104 and a pin spring 112, the pin 103 is movably installed on the flip upper part 105, the pin spring 112 is sleeved on the pin 103, the pin pull rope 104 is suitable for connecting the pin 103, the two ends of the pin spring 112 respectively abut the pin 103 and the flip upper part 105, the positioning groove 102A is cooperated with the pin 103, the pin pull rope 104 is suitable for being pulled to drive the pin 103 to move out of the positioning groove, and the pin 103 is suitable for being embedded in the corresponding positioning groove 102A when the flip upper part 105 is flipped to the second state position to limit the flipping of the flip upper part 105.

[0045] Specifically, the third limiting mechanism includes a third limiting surface arranged on the flip upper part 105 and a third limiting abutting surface arranged on the flip lower part 106, and the third limiting surface is suitable for abutting against the third limiting abutting surface when the flip lower part 106 flips to the third state position to limit the flipping of the flip lower part 106.

[0046] Specifically, the flip plate 107 is hinged to the flip lower part 106 through a hinge shaft 201, and an elastic member 111 is sleeved on the hinge shaft 201. The two ends of the elastic member 111 are respectively connected to the flip plate 107 and the flip lower part 106. In the present embodiment, the elastic member 111 is a spring, but it can also be other structures. During the folding and flipping process, the spring can also absorb part of the impact energy and reduce the impact force generated by the folding and flipping mechanism during the folding and unfolding process.

[0047] In this embodiment, when not in use, the upper flip part 105, the lower flip part 106 and the flip plate 107 can be folded and the folding flip mechanism can be placed in the placement slot 101A below the frame 101 after being folded and flipped, so as to avoid collision and save space.

[0048] In the sitting state, the folding and flipping mechanism is pulled out, at which time the flip upper part 105 is in the first state position, the flip lower part 106 is in the third state position, the flip plate 107 is in the fourth state position, and the footrest surface 105A of the flip plate 107 faces upward, and the user can place both feet on the footrest surface 105A;

[0049] In the sleeping state, the flip upper part 105 is in the second state position, the flip lower part 106 is in the third state position, the flip plate 107 is flipped out and is in the fifth state position, and the leg support surface 105B of the flip plate 107 faces upward. The user lays the wheelchair flat on the wheelchair, and the user can place his legs on the leg support surface 105B, which improves the user's comfort and increases the flexibility of use.

[0050] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A footrest folding and flipping mechanism for a wheelchair, mounted on a wheelchair frame (101), characterized in that: include: a flip upper part (105), the flip upper part (105) being hinged on the vehicle frame (101), the flip upper part (105) having at least a first state position and a second state position relative to the vehicle frame (101) during a flipping process, a first limiting mechanism for limiting the flip upper part (105) in the first state position and a second limiting mechanism for limiting the flip upper part (105) in the second state position being provided between the flip upper part (105) and the vehicle frame (101); a flip lower part (106), the flip lower part (106) being hinged on the flip upper part (105), the flip lower part (106) having at least a third state position relative to the flip upper part (105) during the flipping process, and a third limiting mechanism for limiting the flip lower part (106) in the third state position is provided between the flip lower part (106) and the flip upper part (105); A flip plate (107), wherein the flip plate (107) is hinged on the flip lower part (106).

2. The footrest folding and flipping mechanism for a wheelchair according to claim 1, characterized in that: The flip plate (107) has at least a fourth state position and a fifth state position relative to the flip lower part (106) during the flipping process, and a flip plate limiting mechanism for limiting the flip plate (107) in the fifth state position is provided between the flip plate (107) and the flip lower part (106).

3. The footrest folding and turning mechanism for a wheelchair according to claim 2, characterized in that: A flip plate locking mechanism for locking the flip plate (107) in a fourth state position is provided between the flip plate (107) and the flip lower part (106).

4. The footrest folding and turning mechanism for a wheelchair according to claim 3, characterized in that: The flip plate locking mechanism comprises a locking groove and a locking hook (109), wherein the locking groove is arranged on the flip plate (107), and the locking hook (109) is movably arranged on the flip lower part (106), and the locking hook (109) is suitable for engaging with the locking groove when the flip plate (107) is locked in a fourth state position.

5. The footrest folding and turning mechanism for a wheelchair according to claim 4, characterized in that: The flip plate locking mechanism further comprises a locking button (108), a connecting shaft (110C) and a torsion spring (110B); the locking button (108) is movably mounted on the flip lower part (106); and the locking hook (109) abuts against the locking button (108); The locking hook (109) is rotatably connected to the flip lower part (106) via a connecting shaft (110C); the torsion spring (110B) is sleeved on the connecting shaft (110C); one end of the torsion spring (110B) is connected to the locking hook (109); and the other end of the torsion spring (110B) is connected to the flip lower part (106) or the connecting shaft (110C); The locking button (108) is suitable for driving the locking hook (109) to rotate when being pressed so that the locking hook (109) is separated from the locking groove.

6. The footrest folding and turning mechanism for a wheelchair according to claim 2, characterized in that: The flip limiting mechanism comprises a flip limiting surface arranged on the flip plate (107) and a flip abutting surface arranged on the flip lower part (106); the flip limiting surface is adapted to abut against the flip abutting surface when the flip plate (107) flips to a fifth state position to limit the flipping of the flip plate (107).

7. The footrest folding and flipping mechanism for a wheelchair according to claim 1, characterized in that: A positioning plate (102) is mounted on the vehicle frame (101); the first limiting mechanism comprises a first limiting surface arranged on the positioning plate (102) and a first limiting abutting surface arranged on the flipping upper part (105); the first limiting surface is adapted to abut against the first limiting abutting surface when the flipping upper part (105) flips to a first state position, so as to limit the flipping of the flipping upper part (105).

8. The footrest folding and flipping mechanism for a wheelchair according to claim 1, characterized in that: A positioning plate (102) is mounted on the frame (101), the second limiting mechanism comprises a limiting assembly, the limiting assembly comprises a pin assembly mounted on the flip upper part (105) and a positioning groove (102A) provided on the positioning plate (102), the pin assembly comprises a pin (103), a pin pull rope (104) and a pin spring (112), the pin (103) is movably mounted on the flip upper part (105), the pin spring (112) is sleeved on the pin (103), and the pin pull rope (104) is suitable for connecting The pin shaft (103) and the two ends of the pin shaft spring (112) respectively abut against the pin shaft (103) and the flip upper part (105); the positioning groove (102A) is arranged in cooperation with the pin shaft (103); the pin shaft pull rope (104) is suitable for being pulled to drive the pin shaft (103) to move out of the positioning groove (102A); and the pin shaft (103) is suitable for being embedded in the corresponding positioning groove (102A) when the flip upper part (105) flips to the second state position to limit the flipping of the flip upper part (105).

9. The footrest folding and turning mechanism for a wheelchair according to claim 1, characterized in that: The third limiting mechanism comprises a third limiting surface arranged on the flip upper part (105) and a third limiting abutting surface arranged on the flip lower part (106), wherein the third limiting surface is adapted to abut against the third limiting abutting surface when the flip lower part (106) flips to a third state position so as to limit the flipping of the flip lower part (106).

10. The footrest folding and flipping mechanism for a wheelchair according to claim 1, characterized in that: The flip plate (107) is hingedly connected to the flip lower part (106) via a hinge shaft (201); an elastic member (111) is sleeved on the hinge shaft (201); and two ends of the elastic member (111) are respectively connected to the flip plate (107) and the flip lower part (106).

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