Adjustable pedal structure
By designing the lifting mechanism and sliding mechanism in the wheelchair foot structure, flexible adjustment of the pedal height and extension distance is achieved, and the problem of patients in the prior art that is difficult to adapt to different heights and leg curvatures is solved, and the comfort and portability of use are improved.
Patent Information
- Application Number
- CN202421581472.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-05
AI Technical Summary
When used, the existing wheelchair foot structure is difficult to adapt to patients with different heights and leg joint bending, resulting in suspended feet or thighs, and it is difficult to adjust the lifting height and extension distance of the pedal, affecting the user experience.
An adjustable pedal structure is designed, adopting a lifting mechanism and a sliding mechanism. The lifting mechanism makes the lifting height of the pedal adjustable through helical meshing. The sliding mechanism makes the extension distance of the pedal adjustable through the cooperation of the telescopic rod and the positioning groove, and the folding and unfolding of the pedal through the cooperation of the hinge and the strut.
This structure can effectively adjust the height and extension distance of the pedal, adapt to the needs of patients with different heights and leg curvature, prevent legs or feet from hanging, improve use comfort, and facilitate the expansion and folding of the pedal.
Smart Images
Figure CN222854109U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of wheelchairs, in particular to an adjustable footrest structure. Background Art
[0002] A wheelchair is a tool used to assist patients with limited mobility to move around. It is usually composed of a seat, wheels, armrests, and footrests to provide stable support, allowing patients to move freely indoors and outdoors. This solution specifically involves an adjustable footrest structure;
[0003] When the existing wheelchair footrest structure is in use, since the leg lengths of patients of different heights are different, it is easy for the patient's feet or thighs to be suspended in the air when the foot is supported by the pedal, and it is inconvenient to adjust the pedal lifting height. At the same time, the curvature of the leg joints of different patients is different, so it is inconvenient to adjust the extension distance of the pedal, and it is not convenient to fold and store it, which has a certain impact on actual use. Utility Model Content
[0004] The main purpose of the utility model is to provide an adjustable footrest structure, which can effectively solve the technical problems in the background technology.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] The cam is an adjustable footrest structure, comprising two legs, a crossbeam is installed on the top of the two legs, a lifting mechanism is installed inside the legs, a sliding mechanism is installed at the front of the legs, the lifting mechanism comprises two lifting blocks, the two lifting blocks are movably installed at the front of the two legs respectively, guide rods and screw rods are fixedly installed and movably installed inside the legs, which pass through the upper and lower parts of the lifting blocks, respectively, a rotating rod is movably installed inside the crossbeam, a rocker is installed at one end of the rotating rod, bevel teeth are installed on the outer periphery of the rotating rod near both ends and the top ends of the two screw rods, a support rod is movably installed at the front of the lifting block, and a hinge is installed between the rear end of the support rod and the lifting block.
[0007] As a further solution of the utility model, the thread directions of the two screw rods are arranged in opposite directions, and the lifting block is sleeved on the outer periphery of the screw rod and is arranged in threaded connection.
[0008] As a further solution of the utility model, the lifting block is located at the front of the support leg and is sleeved on the outside of the guide rod to slide up and down, and the bevel teeth at the top of the screw rod are meshed with the bevel teeth on the periphery of the rotating rod.
[0009] As a further solution of the utility model, the support rod is movably rotatably arranged at the front of the lifting block through a hinge, and the support rod is clamped with the rear end of the bottom and the front bottom of the lifting block.
[0010] As a further solution of the utility model, the sliding mechanism includes two telescopic rods, which are movably installed inside the two support rods respectively, and the same pedal is installed between the front ends of the two telescopic rods and at the tops of the two support rods, a sliding rod is installed at the bottom of the pedal near the rear end, a number of positioning grooves are opened on the top of the support rod, positioning rods are movably installed on both sides of the top of the pedal near the rear end, a spring is installed on the periphery of the positioning rod and inside the pedal, and a pull block is installed on the top of the positioning rod.
[0011] As a further solution of the utility model, the telescopic rod is located inside the support rod and is slidably arranged forward and backward, and the bottom of the pedal is fixedly installed between the front end and the two telescopic rods.
[0012] As a further solution of the utility model, the positioning rod passes through the interior of the pedal and is slidably arranged up and down, and the bottom end of the positioning rod is snap-connected with the positioning groove.
[0013] The beneficial effects of the utility model are as follows:
[0014] By setting a lifting mechanism, under the action of the helical teeth meshing, the rotating rod drives the two screws to rotate simultaneously, so that the two lifting blocks slide up and down at the same time, which is convenient for adjusting the lifting height of the pedal, suitable for patients of different heights, and can prevent the legs or feet from hanging in the air;
[0015] By setting up a sliding mechanism, the telescopic rod slides inside the support rod, so that the pedal slides on the top of the two support rods. The positioning rod is engaged or disengaged with the corresponding positioning groove under the action of the spring, which is convenient for adjusting the extension distance of the pedal to make the patient more comfortable. It is automatically fixed after convenient adjustment. By coordinating the use of the support rod and the hinge, the pedal is rotated to the front of the two legs, which is convenient for the pedal to be unfolded and folded for storage. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of an adjustable footrest structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the internal structure of a lifting mechanism in an adjustable footrest structure of the utility model;
[0018] Figure 3 This is a schematic diagram of the internal structure of a sliding mechanism in an adjustable footrest structure of the utility model;
[0019] Figure 4 The utility model is an adjustable footrest structure Figure 3 A magnified image of point A;
[0020] Figure 5 The utility model is a schematic diagram of the structure of an adjustable footrest structure after folding.
[0021] In the figure: 1. Support foot; 2. Crossbeam; 3. Lifting mechanism; 4. Sliding mechanism; 5. Lifting block; 6. Guide rod; 7. Screw rod; 8. Rotating rod; 9. Rocker; 10. Bevel gear; 11. Support rod; 12. Hinge; 13. Telescopic rod; 14. Pedal; 15. Sliding rod; 16. Positioning slot; 17. Positioning rod; 18. Spring; 19. Pull block. DETAILED DESCRIPTION
[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0023] like Figure 1-5 As shown, an adjustable footrest structure includes two supporting legs 1, a cross beam 2 is installed on the top of the two supporting legs 1, a lifting mechanism 3 is installed inside the supporting legs 1, a sliding mechanism 4 is installed at the front of the supporting legs 1, the lifting mechanism 3 includes two lifting blocks 5, the two lifting blocks 5 are movably installed at the front of the two supporting legs 1, guide rods 6 and screw rods 7 are fixedly installed and movably installed respectively through the upper and lower parts of the lifting blocks 5 and located inside the supporting legs 1, a rotating rod 8 is movably installed inside the cross beam 2, a rocker 9 is installed at one end of the rotating rod 8, oblique teeth 10 are installed on the outer periphery of the rotating rod 8 near both ends and the top ends of the two screw rods 7, a support rod 11 is movably installed at the front of the lifting block 5, and a hinge 12 is installed between the rear end of the support rod 11 and the lifting block 5.
[0024] In this embodiment, the thread directions of the two screw rods 7 are set in opposite directions, and the lifting block 5 is sleeved on the outer periphery of the screw rod 7 and is threadedly connected. By rotating the screw rod 7, the lifting block 5 slides up and down to adjust the lifting height.
[0025] In this embodiment, the lifting block 5 is located at the front of the support leg 1 and is sleeved on the outside of the guide rod 6 to slide up and down. The bevel teeth 10 at the top of the screw 7 and the bevel teeth 10 on the periphery of the rotating rod 8 are meshed and connected. The meshing of the bevel teeth 10 allows the two screws 7 to rotate simultaneously, which can prevent tilting when adjusting the height.
[0026] In this embodiment, the support rod 11 is located at the front of the lifting block 5 through a hinge 12 and is movably rotatable. The support rod 11 is clamped between the rear end of the bottom and the front bottom of the lifting block 5. The support rod 11 is rotated to the front end of the lifting block 5 through the hinge 12 to make them parallel to each other, which is convenient for folding and unfolding.
[0027] In this embodiment, the sliding mechanism 4 includes two telescopic rods 13, which are movably installed inside the two support rods 11 respectively. The same pedal 14 is installed between the front ends of the two telescopic rods 13 and at the tops of the two support rods 11. A sliding rod 15 is installed at the bottom of the pedal 14 near the rear end. A plurality of positioning grooves 16 are provided on the top of the support rod 11. Positioning rods 17 are movably installed on both sides of the top of the pedal 14 near the rear end. A spring 18 is installed on the periphery of the positioning rod 17 and inside the pedal 14. A pull block 19 is installed on the top of the positioning rod 17. The pedal 14 can adjust its front and rear position by sliding the telescopic rod 13, and is suitable for support use at different positions.
[0028] In this embodiment, the telescopic rod 13 is located inside the support rod 11 and is slidable back and forth. The bottom of the pedal 14 is fixedly installed between the front end and the two telescopic rods 13. During the sliding process of the pedal 14 and the telescopic rod 13, the rear end of the pedal 14 is supported by the sliding rod 15 to reduce the friction at the bottom of the pedal 14.
[0029] In this embodiment, the positioning rod 17 passes through the interior of the pedal 14 and is slidable up and down. The bottom end of the positioning rod 17 is snap-connected with the positioning groove 16. The positioning rod 17 is snapped into the corresponding positioning groove 16 under the action of the spring 18, which facilitates the fixation of the pedal 14 after adjustment.
[0030] It should be noted that the utility model is an adjustable footrest structure. When in use, the pedal 14 provides support for the patient's legs and feet. When patients of different heights adjust the support height, the swing plate 9 is shaken to rotate the rotating rod 8, and the two screw rods 7 are rotated at the same time under the meshing action of the bevel teeth 10, and the two lifting blocks 5 are driven to slide up and down synchronously under the action of the thread, so that the support rod 11 drives the height of the pedal 14 to change. When it is necessary to adjust the stretching distance of the pedal 14, the two pulling blocks 19 are pulled to make the positioning rod 17 slide upward and disengage from the positioning groove 16, and the sliding pedal 14 makes the telescopic rod 13 slide inside the support rod 11. When the distance is adjusted to the specified distance, the positioning rod 17 slides downward under the action of the spring 18 and is fixed in the corresponding positioning groove 16. When the pedal 14 is not needed, the pedal 14 is folded by rotating the pedal 14 to the front of the two supporting feet 1, so that the support rod 11 rotates through the hinge 12, and is fixed under the friction force of the hinge 12.
[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. An adjustable footrest structure, comprising two supporting feet (1), a crossbeam (2) being installed on the top of the two supporting feet (1), a lifting mechanism (3) being installed inside the supporting feet (1), and a sliding mechanism (4) being installed at the front of the supporting feet (1), characterized in that: The lifting mechanism (3) comprises two lifting blocks (5), the two lifting blocks (5) are movably mounted on the front of the two supporting legs (1), guide rods (6) are fixedly mounted and screw rods (7) are movably mounted on the upper and lower parts of the lifting blocks (5) and located inside the supporting legs (1), a rotating rod (8) is movably mounted inside the cross beam (2), a rocker (9) is mounted on one end of the rotating rod (8), oblique teeth (10) are mounted on the outer ends of the rotating rod (8) and the top ends of the two screw rods (7), a support rod (11) is movably mounted on the front of the lifting block (5), and a hinge (12) is mounted between the rear end of the support rod (11) and the lifting block (5).
2. The adjustable footrest structure according to claim 1, characterized in that: The thread directions of the two screw rods (7) are opposite to each other, and the lifting block (5) is sleeved on the outer periphery of the screw rod (7) in a threaded connection.
3. The adjustable footrest structure according to claim 1, characterized in that: The lifting block (5) is located at the front of the support foot (1) and is sleeved on the outside of the guide rod (6) to slide up and down. The oblique teeth (10) at the top of the screw rod (7) and the oblique teeth (10) on the outer periphery of the rotating rod (8) are meshed and connected.
4. The adjustable footrest structure according to claim 1, characterized in that: The support rod (11) is movably rotatably arranged at the front of the lifting block (5) via a hinge (12), and the support rod (11) is clamped with the rear end of the bottom and the front end of the lifting block (5).
5. The adjustable footrest structure according to claim 1, characterized in that: The sliding mechanism (4) comprises two telescopic rods (13), the two telescopic rods (13) are movably mounted inside the two support rods (11), a pedal (14) is mounted between the front ends of the two telescopic rods (13) and located on the tops of the two support rods (11), a sliding rod (15) is mounted at the bottom of the pedal (14) near the rear end, a plurality of positioning grooves (16) are provided at the top of the support rod (11), positioning rods (17) are movably mounted at both sides of the top of the pedal (14) near the rear end, a spring (18) is mounted on the periphery of the positioning rod (17) and located inside the pedal (14), and a pull block (19) is mounted at the top of the positioning rod (17).
6. The adjustable footrest structure according to claim 5, characterized in that: The telescopic rod (13) is located inside the support rod (11) and is arranged to slide forward and backward, and the bottom of the pedal (14) is fixedly installed between the front end and the two telescopic rods (13).
7. The adjustable footrest structure according to claim 5, characterized in that: The positioning rod (17) penetrates the interior of the pedal (14) and is slidably arranged up and down, and the bottom end of the positioning rod (17) is clamped with the positioning groove (16).