A walking aid

Abstract

The utility model discloses a kind of walking aids, including waist assembly and action assembly, the waist assembly and action assembly are connected through energy storage drive assembly, it is characterized by: the energy storage drive assembly includes shell and energy storage component, the energy storage component is arranged in shell, the energy storage component includes cam, rocker arm and first energy storage spring, the cam is rotatably arranged in shell by pivot, the rocker arm is pivoted in shell, the rocker arm includes first arm and second arm, the length of the first arm is greater than the length of second arm, the end of the first arm is connected with first energy storage spring, the end of the second arm is equipped with roller follower, the roller follower is connected with cam. The first energy storage spring of the utility model is connected with cam by rocker arm, the first arm of rocker arm is greater than second arm, the output force of first energy storage spring to action assembly is amplified by lever principle, improve the carrying capacity of walking aid, simple structure, low maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a walking aid. Background Technology

[0002] Walking aids are important tools for improving mobility, enhancing safety, and improving quality of life. They help people who experience lower limb weakness when walking by reducing the burden of lifting the lower limbs.

[0003] In existing motorless walking aids, a spring directly pushes a driven bearing, and the action component drives a cam to rotate via a connecting rod. The user's leg weight compresses the spring to store energy, which is then released to assist in lifting the leg. For example, Chinese patent CN211188110U discloses a walking aid that includes a power storage component and an action component connected by a connecting rod. The power storage component includes a housing containing a cam, a swing arm, and a spring. The cam is rotatably mounted within the housing via a shaft. One end of the swing arm has a driven bearing, and the other end is pivotally mounted within the housing. The lower side of the driven bearing is fixed to the top of the spring, and the upper side of the driven bearing is in contact with the cam. However, the existing technology has the following drawbacks: 1. The spring acts directly on the cam drive end, and the output force depends entirely on the stiffness of the spring itself; 2. For heavier users, the spring requires a very large preload to provide sufficient lifting force, resulting in a bulky and easily malfunctioning mechanism with limited load-bearing capacity. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a walking aid that improves load-bearing capacity through a mechanical structure.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a walking aid, comprising a waist assembly and an action assembly, wherein the waist assembly and the action assembly are connected by an energy storage drive assembly, characterized in that: the energy storage drive assembly comprises a housing and an energy storage component, the energy storage component is disposed within the housing, the energy storage component comprises a cam, a rocker arm, and a first energy storage spring, the cam is rotatably disposed in the housing via a pivot, the rocker arm is pivotally disposed in the housing, the rocker arm comprises a first lever arm and a second lever arm, the length of the first lever arm is greater than the length of the second lever arm, the end of the first lever arm is connected to the first energy storage spring, and the end of the second lever arm is provided with a roller follower, the roller follower being connected to the cam.

[0006] The first energy storage spring of this invention is connected to the cam via a rocker arm. The first lever arm of the rocker arm is greater than the second lever arm. By levering the principle, the output force of the first energy storage spring on the action assembly is amplified, thereby improving the load-bearing capacity of the walking aid. The structure is simple and the maintenance cost is low.

[0007] Preferably, the end of the first lever arm is provided with a first swing block, the first swing block including a first working plane, and one end of the first energy storage spring abuts against the first working plane. The first swing block swings accordingly, preventing the first energy storage spring from swaying and getting stuck, ensuring that the first energy storage spring pushes the rocker arm, so that the linkage between the first energy storage spring, the rocker arm and the cam operates stably.

[0008] Furthermore, the housing is equipped with a first pressure adjusting bolt, and the other end of the first energy storage spring abuts against the end of the first pressure adjusting bolt; when the first pressure adjusting bolt is screwed in, it pushes the first energy storage spring to increase the pre-compression; when the first pressure adjusting bolt is screwed out, it decreases the pre-compression of the first energy storage spring. The pressure adjusting bolt realizes the adjustment of the pre-compression of the first energy storage spring, controls the initial energy storage, and adapts to the needs of different users.

[0009] Preferably, the end of the second lever arm is further provided with a second swing block, the second swing block including a second working plane; the energy storage assembly also includes a second energy storage spring, one end of the second energy storage spring pressing against the second working plane. The first energy storage spring and the second energy storage spring cooperate to apply an output force to the roller follower, further improving the load-bearing capacity of the product.

[0010] Furthermore, the housing is threadedly connected to a second pressure adjusting bolt, and the other end of the second energy storage spring abuts against the end of the second pressure adjusting bolt; when the second pressure adjusting bolt is screwed in, the second energy storage spring is pushed to increase its pre-compression; when the second pressure adjusting bolt is screwed out, the pre-compression of the second energy storage spring is reduced. The pre-compression of the second energy storage spring is thus adjusted.

[0011] With the second energy storage spring, when the center distance between the roller follower and the shaft gradually increases, the first and second energy storage springs are in a compressed energy storage state; when the center distance between the roller follower and the shaft gradually decreases, the first and second energy storage springs are in a released energy state.

[0012] With a second energy storage spring, the first and second energy storage springs are arranged parallel to each other on the housing. This parallel spring arrangement saves space.

[0013] With a second energy storage spring, the roller follower is sleeved on the mounting shaft. The roller follower is coaxially arranged with the second swing block. The mounting shaft is located at the end of the second lever arm, and part of it extends into the guide groove of the housing. The guide groove allows the mounting shaft to move, ensuring a stable contact trajectory between the roller follower and the cam.

[0014] Preferably, a stop post is fixedly provided on the housing. The stop post contacts the arc-shaped groove of the cam to prevent the cam from continuing to rotate. The stop post can prevent the cam from over-rotating and prevent injury to the user. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a utility model Figure 1 A magnified view of part A.

[0017] Figure 3 This is a structural schematic diagram of the energy storage component of this utility model.

[0018] Figure 4 This is a schematic diagram of the rocker arm of this utility model.

[0019] The names of the body parts referred to by the numbers in the above attached diagrams are as follows: The components include: 1. Waist assembly; 2. Action assembly; 3. Housing; 4. Energy storage component; 41. Cam; 42. Rocker arm; 421. First lever arm; 422. Second lever arm; 43. First energy storage spring; 44. Roller follower; 5. Rotating shaft; 6. First swing block; 7. First pressure adjusting bolt; 8. Second energy storage spring; 9. Second swing block; 91. Second action plane; 10. Second pressure adjusting bolt; 11. Mounting shaft; 12. Stop post; 13. Guide groove. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Example 1

[0021] A walking aid includes a waist assembly 1 and an action assembly 2, which are connected by an energy storage drive assembly. The waist assembly 1 includes a waist belt, and the action assembly 2 includes a connecting rod, a hook, and a leg strap. The connecting rod is connected to the leg strap via the hook. The energy storage drive assembly includes a housing 3 and an energy storage component 4. The housing 3 is connected to the waist belt via a waist belt hanger. The energy storage component 4 is disposed inside the housing 3 and includes a cam 41, a rocker arm 42, and a first energy storage spring 43. The cam 41 is rotatably disposed in the housing 3 via a rotating shaft 5. The connecting rod is connected to the cam 41, and the cam 41 drives the connecting rod to swing up and down. The rocker arm 42 is pivotally mounted on the housing 3 and is rotatably installed within the housing 3 via a main shaft. The rocker arm 42 includes a first lever arm 421 and a second lever arm 422. The length of the first lever arm 421 is greater than the length of the second lever arm 422. The end of the first lever arm 421 is connected to a first energy storage spring 43. To ensure stable contact between the first lever arm 421 and the first energy storage spring 43, a first swing block 6 is provided at the end of the first lever arm 421. The first swing block 6 includes a first working plane, and one end of the first energy storage spring 43 abuts against the first working plane. The first working plane transmits the spring force of the first energy storage spring 43, preventing the first energy storage spring 43 from swaying. A roller follower 44 is provided at the end of the second lever arm 422. The roller follower 44 is connected to a cam 41, and the roller follower 44 and the cam 41 are in rolling contact.

[0022] The first lever arm 421 is equipped with a first swing block 6 at its end. The first swing block 6 includes a first working plane. One end of the first energy storage spring 43 abuts against the first working plane. The first swing block 6 can swing up and down, so that the first energy storage spring 43 is perpendicularly pressed against the first working plane, ensuring that the first energy storage spring 43 avoids swaying and stably transmits the spring force to the cam 41. To meet the needs of different users, the housing 3 is equipped with a first pressure adjusting bolt 7. The housing 3 has a first nut. The first pressure adjusting bolt 7 is threadedly connected to the first nut. The other end of the first energy storage spring 43 abuts against the end of the first pressure adjusting bolt 7. When the first pressure adjusting bolt 7 is screwed in, the first energy storage spring 43 is pushed to increase the pre-compression; when the first pressure adjusting bolt 7 is screwed out, the pre-compression of the first energy storage spring 43 is reduced.

[0023] A stop post 12 is fixedly installed on the housing 3. The stop post 12 contacts the arc-shaped groove of the cam 41 to prevent the cam 41 from continuing to rotate. This stops the cam 41 from rotating too much and causing injury to the user.

[0024] During operation, the first pressure adjusting bolt 7 is screwed in or out according to user needs to adjust the pre-compression of the first energy storage spring 43. The first energy storage spring 43, the first swing block 6, the rocker arm 42, the roller follower 44 and the cam 41 work together in a coordinated manner. When the user puts their foot down, their own weight increases the center distance between the roller follower 44 and the rotating shaft 5 of the cam 41, and the rocker arm swings to compress the first energy storage spring 43. When the user lifts their foot, the first energy storage spring 43 amplifies the spring force through the rocker arm, whose first lever arm 421 is longer than the second lever arm 422, to assist the user in lifting their foot. Example 2

[0025] Based on Embodiment 1, the second lever arm 422 is further provided with a second swing block 9 at its end, the second swing block 9 including a second action plane 91; the energy storage component 4 also includes a second energy storage spring 8, the second energy storage spring 8 and the first energy storage spring 43 are respectively disposed on opposite sides of the rocker arm 42, one end of the second energy storage spring 8 abuts against the second action plane 91, the second energy storage spring 8 further improves the load-bearing capacity of the product, the second action plane 91 transmits the spring force of the second energy storage spring 8, and prevents the second energy storage spring 8 from swaying. The end of the second lever arm 422 is provided with a mounting shaft 11, the roller follower 44 is sleeved on the mounting shaft 11, the roller follower 44 is coaxially disposed with the second swing block 9, the mounting shaft 11 is disposed at the end of the second lever arm 422, and its part extends into the guide groove 13 of the housing 3. The guide groove 13 restricts the movement trajectory of the mounting shaft 11, ensuring the stability of the movement trajectory of the driven roller and the cam 41.

[0026] In order to adjust the pre-compression of the second energy storage spring 8, the housing 3 is threadedly connected to a second pressure adjusting bolt 10, and a second nut is fixedly installed on the housing 3. The second pressure adjusting bolt 10 is threadedly connected to the second nut, and the other end of the second energy storage spring 8 abuts against the end of the second pressure adjusting bolt 10. When the second pressure adjusting bolt 10 is screwed in, the second energy storage spring 8 is pushed to increase the pre-compression. When the second pressure adjusting bolt 10 is screwed out, the pre-compression of the second energy storage spring 8 is reduced.

[0027] To save space in the housing 3, the first energy storage spring 43 and the second energy storage spring 8 are arranged in parallel on the housing 3, resulting in a more reasonable layout.

[0028] When the center distance between the roller follower 44 and the rotating shaft 5 gradually increases, the first energy storage spring 43 and the second energy storage spring 8 are in a compressed energy storage state; when the center distance between the roller follower 44 and the rotating shaft 5 gradually decreases, the first energy storage spring 43 and the second energy storage spring 8 are in a released energy state.

[0029] During operation, the first pressure adjusting bolt 7 and the second pressure adjusting bolt 10 are screwed in or out according to user needs to adjust their pre-compression. The first energy storage spring 43 and the second energy storage spring 8 apply spring force to the roller follower 44 at one end of the rocker arm 42 through the first swing block 6 and the second swing block 9. When the user puts their foot down, their own weight increases the center distance between the roller follower 44 and the cam 41 shaft 5, and the rocker arm swings to compress the first energy storage spring 43 and the second energy storage spring 8. The first energy storage spring 43 and the second energy storage spring 8 are in a compressed energy storage state. When the user lifts their foot, the center distance between the roller follower 44 and the cam 41 shaft 5 gradually decreases, and the first energy storage spring 43 and the second energy storage spring 8 switch to a release state. The first energy storage spring 43 amplifies the spring force through the rocker arm, whose first lever arm 421 is longer than the second lever arm 422, to assist the user in lifting their foot.

[0030] In the description of this invention, it should be understood that the terms "center," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall fall within the scope of the patent of the present utility model.

Claims

1. A walking aid, comprising a waist assembly (1) and an action assembly (2), wherein the waist assembly (1) and the action assembly (2) are connected via an energy storage drive assembly, characterized in that: The energy storage drive assembly includes a housing (3) and an energy storage component (4). The energy storage component (4) is disposed inside the housing (3). The energy storage component (4) includes a cam (41), a rocker arm (42), and a first energy storage spring (43). The cam (41) is rotatably disposed in the housing (3) via a rotating shaft (5). The rocker arm (42) is pivotally disposed in the housing (3). The rocker arm (42) includes a first lever arm (421) and a second lever arm (422). The length of the first lever arm (421) is greater than the length of the second lever arm (422). The end of the first lever arm (421) is connected to the first energy storage spring (43). The end of the second lever arm (422) is provided with a roller follower (44). The roller follower (44) is connected to the cam (41).

2. The walking aid according to claim 1, characterized in that: The first lever arm (421) is provided with a first swing block (6) at its end. The first swing block (6) includes a first working plane, and one end of the first energy storage spring (43) presses against the first working plane.

3. The walking aid according to claim 2, characterized in that: The housing (3) is equipped with a first pressure adjusting bolt (7), and the other end of the first energy storage spring (43) abuts against the end of the first pressure adjusting bolt (7); When the first pressure adjusting bolt (7) is screwed in, the first energy storage spring (43) is pushed to increase the pre-compression amount; When the first pressure adjusting bolt (7) is unscrewed, the pre-compression of the first energy storage spring (43) is reduced.

4. The walking aid according to claim 1, characterized in that: The end of the second lever arm (422) is also provided with a second swing block (9), the second swing block (9) including a second action plane (91); The energy storage component (4) also includes a second energy storage spring (8), one end of which presses against the second working plane (91).

5. The walking aid according to claim 4, characterized in that: The housing (3) is threadedly connected to a second pressure adjusting bolt (10), and the other end of the second energy storage spring (8) abuts against the end of the second pressure adjusting bolt (10); When the second pressure adjusting bolt (10) is screwed in, the second energy storage spring (8) is pushed to increase the pre-compression amount; When the second pressure adjusting bolt (10) is unscrewed, the pre-compression of the second energy storage spring (8) is reduced.

6. The walking aid according to claim 4, characterized in that: When the center distance between the roller follower (44) and the shaft (5) gradually increases, the first energy storage spring (43) and the second energy storage spring (8) are in a compressed energy storage state; when the center distance between the roller follower (44) and the shaft (5) gradually decreases, the first energy storage spring (43) and the second energy storage spring (8) are in a released energy state.

7. The walking aid according to claim 4, characterized in that: The first energy storage spring (43) and the second energy storage spring (8) are arranged in parallel on the housing (3).

8. The walking aid according to claim 4, characterized in that: The roller follower (44) is sleeved on the mounting shaft (11). The roller follower (44) is coaxially arranged with the second swing block (9). The mounting shaft (11) is disposed at the end of the second lever arm (422) and its part extends into the guide groove (13) of the housing (3).

9. The walking aid according to claim 1, characterized in that: A stop post (12) is fixedly provided on the housing (3). The stop post (12) contacts the arc-shaped groove of the cam (41) to prevent the cam (41) from continuing to rotate.

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