Wheelchair assist device for lower limb fracture

The wheelchair assistive device addresses the challenge of limb positioning for knee fracture patients by providing adjustable stretch components and angle regulation, ensuring comfortable and safe use for diverse leg lengths.

CN223095731UActive Publication Date: 2025-07-15ZHONGSHAN HOSPITAL FUDAN UNIV
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Patent Information

Application Number
CN202422197660.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-09
Publication Date
2025-07-15
Estimated Expiration
2034-09-09

AI Technical Summary

Technical Problem

Patients with lower limb fractures, especially knee fractures, cannot bend their knees, which leads to inconvenient placement of affected limbs when using a wheelchair. The existing technology requires human assistance, which is wasteful and unsafe.

Method used

A wheelchair assist device for lower limb fracture is designed. Through the first and second telescopic components and angle adjustment structure, combined with the combination of ratchets and pawls, the length and angle adjustment of the seat plate and telescopic components are realized, so that the patient can adjust to a comfortable position by himself.

Benefits of technology

It realizes that patients can place the affected limbs safely and comfortably on their own, reduces manpower waste, improves convenience and safety of use, and is easy to carry.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a lower limb fracture wheelchair assist device which comprises a seat plate, the seat plate is movably connected with a first telescopic assembly through a first angle adjusting structure, and the seat plate is further movably connected with a second telescopic assembly through a second angle adjusting structure. The first telescopic assembly and the second telescopic assembly each comprise two first connecting pipes, two second connecting pipes and two third connecting pipes, wherein the two second connecting pipes are arranged in the first connecting pipes in a penetrating mode and are in sliding connection with the first connecting pipes, and the two third connecting pipes are arranged in the second connecting pipes in a penetrating mode and are in sliding connection with the second connecting pipes. The utility model has the beneficial effects that the lengths of the first telescopic component and the second telescopic component can be adjusted by adjusting the positions of the connecting pipes, so that people with various leg lengths can conveniently use the chair; through cooperation of a ratchet wheel and a pawl, the angle between the seat plate and the first telescopic assembly and the angle between the seat plate and the second telescopic assembly can be adjusted, and therefore a patient can select the comfortable angle to place the lower limbs during use.
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Description

Technical Field

[0001] The utility model relates to the technical field of wheelchair aids, in particular to a wheelchair aid for lower limb fractures. Background Art

[0002] Lower limb fractures are common fracture types in orthopedics. For patients with lower limb fractures, especially those with knee fractures, due to the inability to bend the knees, it will cause problems in placing the affected limbs inconveniently when using a wheelchair. At present, when such problems occur in clinical practice, it often requires one person to assist in lifting the affected limb in front of the wheelchair and another person to push the wheelchair from behind, resulting in a waste of manpower and an inability to ensure safety when using the wheelchair. Summary of the Utility Model

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a wheelchair aid for lower limb fractures, which is used to solve the problem that patients with knee fractures in the prior art have inconvenient placement of the affected limbs when using a wheelchair due to the inability to bend the knees.

[0004] To achieve the above object and other related objects, the present utility model provides the following technical solutions:

[0005] A wheelchair aid for lower limb fractures includes a seat board. The seat board is movably connected with a first telescopic component through a first angle adjustment structure, and the seat board is also movably connected with a second telescopic component through a second angle adjustment structure. Both the first telescopic component and the second telescopic component include two first connecting pipes, two second connecting pipes inserted into and slidably connected with the first connecting pipes, and two third connecting pipes inserted into and slidably connected with the second connecting pipes. A first locking member for positioning the second connecting pipe is provided on the side of the first connecting pipe, and a second locking member for positioning the third connecting pipe is provided on the side of the second connecting pipe.

[0006] The above technical solution can adjust the lengths of the first telescopic component and the second telescopic component by adjusting the positions of the third connecting pipe in the second connecting pipe and the second connecting pipe in the first connecting pipe, so as to facilitate the use of people with various leg lengths. In addition, the second connecting pipe can be fixed in the first connecting pipe through the first locking member, and the third connecting pipe can be fixed in the second connecting pipe through the second locking member, thus facilitating the positioning of the second connecting pipe and the third connecting pipe.

[0007] In an embodiment of the present utility model, a sponge pad is provided on the top side of the seat board, and a first placement groove for placing the first telescopic component is provided on the bottom side of the seat board corresponding to the first telescopic component, and a second placement groove for placing the second telescopic component is provided on the bottom side of the seat board corresponding to the second telescopic component.

[0008] In one embodiment of the utility model, the first angle adjustment structure and the second angle adjustment structure both include a first connecting member installed on the seat plate and a second connecting member installed on the telescopic assembly and movably connected to the first connecting member, the first connecting member includes a first connecting rod and a connecting plate installed on the first connecting rod, and the second connecting member includes a second connecting rod and a ratchet installed on the second connecting rod and movably connected to the connecting plate through a first pin shaft.

[0009] In one embodiment of the utility model, a gear tooth blocking member is provided on the connecting plate at a position close to the first connecting rod, and the gear tooth blocking member includes a torsion spring and a pawl installed on the torsion spring and meshing with the ratchet wheel, and the connecting plate is movably connected to the torsion spring via a second pin shaft.

[0010] In one embodiment of the utility model, the side of the ratchet wheel away from the connecting plate is also movably connected to a pull-buckle piece via a first pin shaft, and the pull-buckle piece is provided with a protrusion for contacting the ratchet pawl.

[0011] The above technical solution can adjust the angle between the seat plate and the first telescopic component and the second telescopic component through the cooperation of the ratchet and the pawl, so that the patient can choose the angle that he feels comfortable to place his lower limbs when using it. When the protrusion on the trigger plate contacts the pawl, the pawl can release the ratchet, thereby releasing the pawl from restricting the one-way rotation of the ratchet and allowing the ratchet to rotate freely.

[0012] In one embodiment of the utility model, a first cross bar is connected between the two first connecting tubes, a second cross bar is connected to the side of the two second connecting tubes close to the third connecting tube, and a third cross bar is connected to the side of the two third connecting tubes away from the second connecting tube.

[0013] As described above, the wheelchair assistive device for lower limb fractures of the utility model has the following beneficial effects:

[0014] The utility model can adjust the lengths of the first telescopic assembly and the second telescopic assembly by adjusting the position of the third connecting tube in the second connecting tube and the position of the second connecting tube in the first connecting tube, thereby making it convenient for people with different leg lengths to use the wheelchair; the angles between the seat plate and the first telescopic assembly and the second telescopic assembly can be adjusted by the cooperation of the ratchet and the pawl, thereby making it possible for patients to place their lower limbs at an angle that they feel comfortable with during use; and the utility model not only makes it convenient for patients with lower limb fractures to place their affected limbs safely and comfortably when using the wheelchair, but is also lightweight, durable and easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1Front view schematic diagram of the lower limb fracture wheelchair assistor disclosed in the embodiment of the present utility model;

[0016] Figure 2 Rear view schematic diagram of the seat board in the lower limb fracture wheelchair assistor disclosed in the embodiment of the present utility model;

[0017] Figure 3 Left view schematic diagram of the lower limb fracture wheelchair assistor disclosed in the embodiment of the present utility model;

[0018] Figure 4 Cross-sectional schematic diagram of the first angle adjustment structure and the second angle adjustment structure in the lower limb fracture wheelchair assistor disclosed in the embodiment of the present utility model;

[0019] Figure 5 Overall schematic diagram of the second connecting piece in the lower limb fracture wheelchair assistor disclosed in the embodiment of the present utility model;

[0020] Figure 6 Overall schematic diagram of the buckle piece in the lower limb fracture wheelchair assistor disclosed in the embodiment of the present utility model.

[0021] Element number description

[0022] 1. Seat board; 2. Sponge pad; 3. First angle adjustment structure; 4. Second angle adjustment structure; 5. First telescopic assembly; 6. Second telescopic assembly; 7. First connecting pipe; 8. Second connecting pipe; 9. Third connecting pipe; 10. First locking piece; 11. Second locking piece; 12. First cross bar; 13. Second cross bar; 14. Third cross bar; 15. First placement groove; 16. Second placement groove; 17. First connecting piece; 1701. First connecting rod; 1702. Connecting plate; 18. Second connecting piece; 1801. Second connecting rod; 1802. Ratchet wheel; 19. First pin shaft; 20. Second pin shaft; 21. Tooth blocking piece; 2101. Torsion spring; 2102. Pawl; 22. Buckle piece; 23. Protruding part. Specific implementation manners

[0023] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0024] Please refer to Figure 1 and Figure 2The utility model provides a wheelchair assistive device for lower limb fractures, including a seat plate 1, the material of the seat plate 1 is hard plastic, the seat plate 1 is movably connected with a first telescopic component 5 through a first angle adjustment structure 3, the seat plate 1 is also movably connected with a second telescopic component 6 through a second angle adjustment structure 4, the materials of the first telescopic component 5 and the second telescopic component 6 are both stainless steel; a sponge pad 2 is provided on the top side of the seat plate 1, and the sponge pad 2 improves the comfort of the patient when using the wheelchair assistive device; a first placement groove 15 for placing the first telescopic component 5 is provided on the bottom side of the seat plate 1 corresponding to the first telescopic component 5, and a second placement groove 16 for placing the second telescopic component 6 is provided on the bottom side of the seat plate 1 corresponding to the second telescopic component 6, wherein, when the first telescopic component 5 and the second telescopic component 6 are not in use, the first telescopic component 5 and the second telescopic component 6 can be shortened and placed in the first placement groove 15 and the second placement groove 16 respectively.

[0025] exist Figures 3 to 5 In the embodiment, the first angle adjustment structure 3 and the second angle adjustment structure 4 both include a first connecting member 17 mounted on the seat plate 1 and a second connecting member 18 mounted on the telescopic assembly and movably connected to the first connecting member 17, the first connecting member 17 includes a first connecting rod 1701 and a connecting plate 1702 mounted on the first connecting rod 1701, the second connecting member 18 includes a second connecting rod 1801 and a ratchet 1802 mounted on the second connecting rod 1801 and movably connected to the connecting plate 1702 through a first pin shaft 19, wherein the first connecting rod 1701 and the connecting plate 1702 are integrally formed, and the second connecting rod 1801 and the ratchet 1802 are integrally formed; the connecting plate 1702 is supported by the ratchet 1802. A gear blocking member 21 is provided near the first connecting rod 1701. The gear blocking member 21 includes a torsion spring 2101 and a pawl 2102 mounted on the torsion spring 2101 and meshing with the ratchet 1802. The connecting plate 1702 is movably connected to the torsion spring 2101 through the second pin 20. The torsion spring 2101 is used to make the pawl 2102 generate a force that always leans against the ratchet 1802. The angle between the seat plate 1 and the first telescopic assembly 5 and the second telescopic assembly 6 can be adjusted through the cooperation between the ratchet 1802 and the pawl 2102. Therefore, when using the wheelchair, the patient can choose an angle that he feels comfortable to place his lower limbs, thereby improving the comfort of the patient when sitting in the wheelchair.

[0026] See also Figure 6 The side of the ratchet 1802 away from the connecting plate 1702 is also movably connected to a pull-button piece 22 through the first pin shaft 19, and the pull-button piece 22 is provided with a protrusion 23 for contacting the pawl 2102. When the protrusion 23 on the pull-button piece 22 contacts the pawl 2102, the pawl 2102 can release the ratchet 1802, thereby releasing the pawl 2102 from restricting the one-way rotation of the ratchet 1802, and allowing the ratchet 1802 to rotate freely.

[0027] In Figure 1 and Figure 3 Figure 3 , the first telescopic component 5 and the second telescopic component 6 both include two first connecting pipes 7, two second connecting pipes 8 inserted into the first connecting pipes 7 and slidably connected to the first connecting pipes 7, and two third connecting pipes 9 inserted into the second connecting pipes 8 and slidably connected to the second connecting pipes 8. A first locking member 10 for positioning the second connecting pipe 8 is provided on the side surface of the first connecting pipe 7, and a second locking member 11 for positioning the third connecting pipe 9 is provided on the side surface of the second connecting pipe 8. Among them, in this embodiment, both the first locking member 10 and the second locking member 11 are buckle-type locking mechanisms, which facilitate the opening and locking of the first locking member 10 and the second locking member 11, so as to facilitate the patient to adjust the length of the telescopic component; by adjusting the position of the third connecting pipe 9 in the second connecting pipe 8 and the position of the second connecting pipe 8 in the first connecting pipe 7, the lengths of the first telescopic component 5 and the second telescopic component 6 can be adjusted, so that people with various leg lengths can use it conveniently. It can be used unilaterally or bilaterally. In addition, the second connecting pipe 8 can be fixed in the first connecting pipe 7 through the first locking member 10, and the third connecting pipe 9 can be fixed in the second connecting pipe 8 through the second locking member 11, so as to facilitate the positioning of the second connecting pipe 8 and the third connecting pipe 9;

[0028] A first cross bar 12 is connected between the two first connecting pipes 7, a second cross bar 13 is connected to the side surface of the end of the two second connecting pipes 8 close to the third connecting pipe 9, and a third cross bar 14 is connected to the side surface of the end of the two third connecting pipes 9 away from the second connecting pipe 8. The strength of the telescopic component is enhanced through the first cross bar 12, the second cross bar 13 and the third cross bar 14.

[0029] Specifically, when using this lower limb fracture wheelchair assistor, first, with the cooperation of the ratchet wheel 1802 and the pawl 2102, the first telescopic component 5 and the second telescopic component 6 can be pulled out from the first placement groove 15 and the second placement groove 16 respectively. Then, place the seat plate 1 face up on the wheelchair seat. The patient sits on the sponge pad 2 of the seat plate 1. Then, after pulling out the second connecting pipe 8 and the third connecting pipe 9 in the first telescopic component 5 or the second telescopic component 6 and adjusting them to the required length, place the affected limb on it. The patient can use unilateral placement or bilateral placement; when adjusting the angle, the pawl 2102 also cooperates with the ratchet wheel 1802 during the rotation of the ratchet wheel 1802, so that the seat and the first telescopic component 5 and the second telescopic component 6 can be adjusted to an angle that makes the patient feel comfortable. In addition, when the protrusion 23 on the buckle piece 22 contacts the pawl 2102, the pawl 2102 can release the ratchet wheel 1802, thereby releasing the restriction of the pawl 2102 on the one-way rotation of the ratchet wheel 1802 and enabling the ratchet wheel 1802 to rotate freely.

[0030] In summary, the present utility model can adjust the lengths of the first telescopic assembly 5 and the second telescopic assembly 6 by adjusting the position of the third connecting pipe 9 in the second connecting pipe 8 and the position of the second connecting pipe 8 in the first connecting pipe 7, so as to facilitate the use by people with various leg lengths; the angle between the seat plate 1 and the first telescopic assembly 5 and the second telescopic assembly 6 can be adjusted by the cooperation of the ratchet wheel 1802 and the pawl 2102, so that the patient can choose a comfortable angle to place the lower limbs during use; moreover, the present utility model not only facilitates the safe and comfortable placement of the affected limb of a patient with a lower limb fracture when using a wheelchair, but also is light, durable and easy to carry, and the entire lower limb fracture wheelchair assistor can be wiped and disinfected with a disinfectant wipe to avoid cross-infection.

[0031] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. All equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A lower limb fracture wheelchair assistor, comprising a seat board (1), characterized in that: The seat board (1) is movably connected with a first telescopic assembly (5) through a first angle adjustment structure (3), and the seat board (1) is also movably connected with a second telescopic assembly (6) through a second angle adjustment structure (4); Both the first telescopic assembly (5) and the second telescopic assembly (6) include two first connecting pipes (7), two second connecting pipes (8) inserted into the first connecting pipes (7) and slidably connected with the first connecting pipes (7), and two third connecting pipes (9) inserted into the second connecting pipes (8) and slidably connected with the second connecting pipes (8). A first locking member (10) for positioning the second connecting pipe (8) is provided on the side surface of the first connecting pipe (7), and a second locking member (11) for positioning the third connecting pipe (9) is provided on the side surface of the second connecting pipe (8).

2. The lower limb fracture wheelchair assistor according to claim 1, wherein: A sponge pad (2) is provided on the top side of the seat board (1). A first placement groove (15) for placing the first telescopic assembly (5) is provided on the bottom side of the seat board (1) corresponding to the first telescopic assembly (5), and a second placement groove (16) for placing the second telescopic assembly (6) is provided on the bottom side of the seat board (1) corresponding to the second telescopic assembly (6).

3. The lower limb fracture wheelchair assist device according to claim 1, characterized in that: Both the first angle adjustment structure (3) and the second angle adjustment structure (4) include a first connecting member (17) installed on the seat board (1) and a second connecting member (18) installed on the telescopic assembly and movably connected with the first connecting member (17). The first connecting member (17) includes a first connecting rod (1701) and a connecting plate (1702) installed on the first connecting rod (1701). The second connecting member (18) includes a second connecting rod (1801) and a ratchet wheel (1802) installed on the second connecting rod (1801) and movably connected with the connecting plate (1702) through a first pin shaft (19).

4. The lower limb fracture wheelchair assistor according to claim 3, characterized in that: A tooth blocking member (21) is provided at a position on the connecting plate (1702) close to the first connecting rod (1701). The tooth blocking member (21) includes a torsion spring (2101) and a pawl (2102) installed on the torsion spring (2101) and meshed with the ratchet wheel (1802). The connecting plate (1702) is movably connected with the torsion spring (2101) through a second pin shaft (20).

5. The lower limb fracture wheelchair assistor according to claim 4, wherein: A trigger plate (22) is also movably connected with the side of the ratchet wheel (1802) far from the connecting plate (1702) through a first pin shaft (19). A protruding portion (23) for contacting the pawl (2102) is provided on the trigger plate (22).

6. The lower limb fracture wheelchair assist device according to claim 1, characterized in that: A first cross bar (12) is connected between the two first connecting pipes (7). A second cross bar (13) is connected to the side surfaces of the two second connecting pipes (8) at the ends close to the third connecting pipes (9), and a third cross bar (14) is connected to the side surfaces of the two third connecting pipes (9) at the ends far from the second connecting pipes (8).