Lower limb strength training device

Abstract

A lower limb muscle strength training device includes a base and two pedal members. The base includes two supporting columns arranged opposite to each other, and each supporting column extends along a first direction. Each pedal member includes a pedal body, a foot support member, a swing mechanism and a connecting rod member, the connecting rod member is pivotally connected to the support column and rotates around an axis extending along a second direction orthogonal to the first direction, and the pedal body is fixed to the connecting rod member. The foot support member is connected to the pedal body via a swing mechanism so as to be swingable in parallel to the second direction.

Description

Technical Field

[0001] This invention relates to the technical field of muscle strength training equipment, and more particularly to a lower limb muscle strength training device designed to simulate the gait of a human body during actual walking. Prior Technology

[0002] Lower limb muscle strength training equipment is suitable for patients whose leg muscles are weak due to disease or injury. It can exercise muscle strength by simulating the human walking state, and gradually restore the muscle strength of the lower limbs through rehabilitation.

[0003] Existing lower limb strength training equipment assumes that the human gait is formed by the feet following two straight lines, as shown in Figure 1. However, in actual walking, due to pelvic rotation and lower limb extension and contraction, the body exhibits external and internal rotation movements, causing the foot's point of contact to deviate. Therefore, existing lower limb strength training equipment cannot tolerate these external and internal rotation movements, which can easily cause joint wear and tear on the user. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a lower limb muscle strength training device that solves the problem that the prior art cannot simulate the outward and inward rotation of the foot when the human body is actually walking, which easily causes joint wear and tear on the user.

[0005] An embodiment of the lower limb muscle strength training device of the present invention includes a base and two pedal components. The base includes two opposing support columns, each extending along a first direction. Each pedal component includes a pedal body, a foot support, a swing mechanism, and a connecting rod. The connecting rod is pivotally connected to the support column and rotates about an axis extending along a second direction. The pedal body is fixed to the connecting rod, and the foot support is oscillatingly connected to the pedal body via the swing mechanism in parallel with the second direction. The first direction and the second direction are orthogonal.

[0006] In another embodiment, the swing mechanism includes a first support component, a second support component, a first linkage component, and a first drive component. The first support component and the second support component are arranged parallel to each other on the pedal body along a second direction. The first linkage component is located between the first support component and the second support component. The foot support is pivotally mounted on the first linkage component, and the first support component and the second support component slidably support the opposite sides of the foot support, so that the opposite sides of the foot support move in opposite directions. The first drive component reciprocates to drive the foot support along the second direction.

[0007] In another embodiment, the first linkage component includes a first component body and a pivot member. The first component body is connected to the foot support and pivotally connected to the pivot member. The second drive component drives the pivot member to move linearly along a second direction.

[0008] In another embodiment, the swing mechanism further includes a second drive component that drives the first linkage component to move in a second direction.

[0009] In another embodiment, the first support component includes a first linear slide rail and at least one first slider slidably connected to the first linear slide rail. The first linear slide rail is disposed on the pedal body and extends along a second direction, and at least one first slider is disposed on the foot support member. The second support component includes a second linear slide rail and at least one second slider slidably connected to the second linear slide rail. The second linear slide rail is disposed on the pedal body and extends along a second direction, and at least one second slider is disposed on the foot support member.

[0010] In another embodiment, the first drive assembly includes a drive linear slide rail extending along a second direction, a slider slidably disposed on the drive linear slide rail, and a first electric cylinder for driving the slider to move.

[0011] In another embodiment, the swing mechanism includes a third support component, a fourth support component, a third drive component, a fourth drive component, and a second linkage component. The third support component and the fourth support component are arranged parallel to each other on the pedal body along a second direction. The second linkage component is movably arranged on the third support component and the fourth support component. The third drive component and the fourth drive component are respectively arranged on opposite sides of the second linkage component and drive the second linkage component to reciprocate parallel to the second direction. The second linkage component is connected to the foot support member.

[0012] In another embodiment, it further includes a connector, wherein the second linkage component includes a second component body and a differential gear, the differential gear being pivotally connected to the second component body, the third drive component includes a first rack, and the fourth drive component includes a second rack, the first rack and the second rack being meshed with the differential gear, when the first rack and the second rack have a speed difference, the differential gear rotates, and the connector is fixed to the foot support and the differential gear, so that the foot support and the differential gear move or swing synchronously in parallel to the second direction.

[0013] In another embodiment, the third drive assembly further includes a first lead screw and a first motor that drives the first lead screw to rotate, the first rack being screwed into the first lead screw, and the rotation of the first lead screw causing the first rack to move parallel to the second direction; the fourth drive assembly further includes a second lead screw and a second motor that drives the second lead screw to rotate, the second rack being screwed into the second lead screw, and the rotation of the second lead screw causing the second rack to move parallel to the second direction.

[0014] In another embodiment, the third support component includes a third linear slide rail extending along the second direction and a third slider sliding on the third linear slide rail, and the fourth support component includes a fourth linear slide rail extending along the second direction and a fourth slider sliding on the fourth linear slide rail, wherein the third slider and the fourth slider are fixedly connected to the second component body.

[0015] In another embodiment, it further includes two mounting seats and two knee positioning members, wherein each mounting seat is connected to a linkage member, and each knee positioning member is movably disposed on a mounting seat parallel to the second direction and located above the foot support member.

[0016] In another embodiment, each mounting base has an extension arm that extends in a second direction, a knee locator is movably coupled to the extension arm, and the extension arm is guided to move in the second direction.

[0017] The lower limb muscle strength training device of the present invention allows the foot support to move or swing relative to the pedal body in a second direction, thereby simulating the real gait of the human body by allowing the outward or inward rotation of the foot during walking, thus avoiding joint damage to the user. Simple Explanation of the Diagram

[0018] Figure 1 is a schematic diagram of the gait generated by a user using existing lower limb muscle strength training equipment. Figure 2 is a perspective view of an embodiment of the lower limb muscle strength training device of the present invention. Figure 3 is a perspective view of the lower limb muscle strength training device in Figure 2 from another angle. Figure 4 is an enlarged view of part A in Figure 2. Figure 5 is a partial exploded view of the lower limb muscle strength training device in Figure 4. Figure 6 is a perspective view of an embodiment of the swing mechanism of the pedal component of the present invention. Figure 7 is a three-dimensional view of Figure 6 from another perspective. Figure 8 is a partial exploded 3D view of Figure 6. Figure 9 is a schematic diagram of the operation of the swing mechanism in Figure 6. Figures 10 and 11 are schematic diagrams showing the foot support component of Figure 6 swinging relative to the pedal body. Figures 12 and 13 are schematic diagrams illustrating the gait of a human body during actual walking using the lower limb muscle strength training device of the present invention. Figure 14 is a perspective view of another embodiment of the swing mechanism of the pedal component of the present invention. Figure 15 is a three-dimensional exploded view of Figure 14. Figure 16 is a partial exploded view of Figure 14. Figures 17 and 18 are schematic diagrams of the foot support component swinging relative to the pedal body in Figure 14. Implementation

[0019] Please refer to Figures 2, 3, 4, and 5, which illustrate an embodiment of the lower limb muscle strength training device of the present invention. The lower limb muscle strength training device 1 of this embodiment includes a base 10, two pedal components 20, two mounting seats 30, and two knee positioning components 40.

[0020] The base 10 includes a chassis 11 and two support columns 12 extending vertically from the chassis 11 along a first direction L1. The two support columns 12 are arranged opposite each other, and the first direction L1 is perpendicular to the ground. Above the support columns 12 are a support plate 13 for the user's waist to rest on and a handrail 14 for the user's hands to grip. Two pedal components 20 are respectively pivotally mounted on the two support columns 12 near the ground. Two mounting seats 30 and two knee positioning components 40 are disposed between the handrail 14 and the pedal components 20. The user's torso is positioned between the support plate 13 and the handrail 14, the knees are held and positioned by the knee positioning components 40, and the feet are supported by the pedal components 20.

[0021] As shown in Figures 4 and 5, each mounting base 30 has an extension arm 31 extending along a second direction L2. The knee positioning member 40 has an assembly groove 41, which is movably engaged with the extension arm 31, allowing the knee positioning member 40 to move along the second direction L2. This allows the user to adjust the position of the knee positioning member 40 according to the width of their legs. This increases user comfort and avoids injury.

[0022] Each pedal component 20 includes a pedal body 21, a foot support 22, a swing mechanism 23, and a connecting rod 24. The connecting rod 24 is pivotally connected to the support column 12 and rotates about an axis a extending along a second direction L2. The pedal body 21 is fixed to the connecting rod 24, and the foot support 22 is oscillatingly connected to the pedal body 21 parallel to the second direction L2 via the swing mechanism 23, that is, the foot support 22 can swing relative to the pedal body 21 in the second direction L2. The first direction L1 is orthogonal to the second direction L2, and the second direction L2 is the direction that crosses the human torso.

[0023] Please refer to Figures 6 to 11, which illustrate an embodiment of the pedal component 20 of the present invention. The swing mechanism 23 of the pedal component 20 in this embodiment includes a first support component 231, a second support component 232, a first linkage component 233, a first drive component 234, and a second drive component 235. The first support component 231 and the second support component 232 are arranged parallel to each other along a second direction L2 on the pedal body 21. The first linkage component 233 is located between the first support component 231 and the second support component 232. The foot support component 22 is connected to the first linkage component 233, and the first support component 231 and the second support component 232 slidably support the opposite sides of the foot support component 22, causing the opposite sides of the foot support component 22 to move in opposite directions. The first drive component 234 reciprocates along the second direction L2 to drive the foot support component 22, and the second drive component 235 drives the first linkage component 233 to move along the second direction L2.

[0024] As shown in Figure 9, when the first drive assembly 234 and the second drive assembly 235 drive the foot support 22 and the first linkage assembly 233 at the same speed and direction, the foot support 22 moves at the same speed relative to its two ends (front and rear ends), causing the foot support 22 to move linearly in the second direction L2. As shown in Figure 10, when the first drive assembly 234 and the second drive assembly 235 drive the foot support 22 and the first linkage assembly 233 at different speeds and / or directions, the foot support 22 moves at different speeds relative to its two ends (front and rear ends), causing the foot support 22 to swing in the second direction L2.

[0025] As shown in Figure 8, the first support component 231 includes a first linear slide rail 2311 and at least one first slider 2312 slidably connected to the first linear slide rail 2311. The first linear slide rail 2311 is disposed on the pedal body 21 and extends along the second direction L2, and the at least one first slider 2312 is disposed on the foot support member 22. The second support component 232 includes a second linear slide rail 2321 and at least one second slider 2322 slidably connected to the second linear slide rail 2321. The second linear slide rail 2321 is disposed on the pedal body 21 and extends along the second direction L2, and the at least one second slider 2322 is disposed on the foot support member 22. Thus, the first support component 231 and the second support component 232 slidably support the foot support member 22.

[0026] Please refer to Figure 9. The first drive assembly 234 includes a drive linear slide rail 2341 extending along the second direction L2, a slider 2342 slidably disposed on the drive linear slide rail 2341, and a first electric cylinder 2343 that drives the slider 2342 to move. The slider 2342 is connected to the foot support 22. The first electric cylinder 2343 drives the slider 2342 to move along the second direction L2, causing the foot support 22 to move along the second direction L2.

[0027] Please refer to Figure 7. The first linkage component 233 includes a first component body 2331 and a pivot member 2332. The first component body 2331 is connected to the foot support member 22 and pivotally connected to the pivot member 2332. The pivot member 2332 is movably disposed on the pedal body 21 along the second direction L2 via a pin and slot connection. The second drive component 235 drives the pivot member 2332 to move linearly along the second direction L2. The second drive component 235 includes a second electric cylinder 2351. The first component body 2331 and the pivot member 2332 are connected by a bearing, allowing the first component body 2331 to rotate relative to the pivot member 2332.

[0028] Please refer to Figures 12 and 13, which show that the user, using the lower limb muscle strength training device 1 of the present invention, can allow the foot to rotate outward or inward, thus producing an eversion gait (as shown by the dotted line). Therefore, compared with existing lower limb muscle strength training devices that can only allow a straight gait (as shown by the dotted chain line), the lower limb muscle strength training device 1 of the present invention can prevent joint injuries to the user.

[0029] Please refer to Figures 14 to 18, which illustrate another embodiment of the oscillating mechanism of the pedal component. In this embodiment, the pedal component 20 further includes a connecting member 25. The oscillating mechanism 23 includes a third support component 236, a fourth support component 237, a third drive component 238, a fourth drive component 239, and a second linkage component 240. The third support component 236 and the fourth support component 237 are arranged parallel to each other along the second direction L2 on the pedal body 21. The second linkage component 240 is movably arranged between the third support component 236 and the fourth support component 237. The third drive component 238 and the fourth drive component 239 are respectively arranged on opposite sides of the second linkage component 240 and drive the second linkage component 240 to reciprocate or oscillate parallel to the second direction L2. The second linkage component 240 is connected to the foot support component 22.

[0030] The third support component 236 includes a third linear slide rail 2361 extending along the second direction L2 and a third slider 2362 sliding on the third linear slide rail 2361. The fourth support component 237 includes a fourth linear slide rail 2371 extending along the second direction L2 and a fourth slider 2372 sliding on the fourth linear slide rail 2371, wherein the third slider 2362 and the fourth slider 2372 are fixedly connected to the second linkage component 240.

[0031] The second linkage component 240 includes a second component body 241 and a differential gear 242. The differential gear 242 is pivotally connected to the second component body 241. The second component body 241 is connected to the third slider 2362 and the fourth slider 2372, so that the third support component 236 and the fourth support component 237 support the second component body 241.

[0032] The third drive assembly 238 includes a first rack 2381, a first lead screw 2382, and a first motor 2383 that drives the first lead screw 2382 to rotate. The first rack 2381 is screwed into the first lead screw 2382. The first motor 2383 drives the first lead screw 2382 to rotate via a pulley assembly, causing the first rack 2381 to move parallel to the second direction L2. The fourth drive assembly 239 includes a second rack 2391, a second lead screw 2392, and a second motor 2393 that drives the second lead screw 2392 to rotate. The second rack 2391 is screwed into the second lead screw 2392. The second motor 2393 drives the second lead screw 2392 to rotate via a pulley set, causing the second rack 2391 to move parallel to the second direction L2. The first rack 2381 and the second rack 2391 are meshed with a differential gear 242. When there is a speed difference between the first rack 2381 and the second rack 2391, the differential gear 242 rotates. The connecting member 25 is fixed to the foot support member 22 and the differential gear 242 and can rotate synchronously with the differential gear 242, so that the foot support member 22 and the differential gear 242 move or swing synchronously parallel to the second direction L2.

[0033] As shown in Figure 17, when the first rack 2381 and the second rack 2391 move in the same direction and at the same speed, the differential gear 242 does not rotate, but the second component body 241 is driven by the first rack 2381 and the second rack 2391 to move linearly along the second direction L2, causing the foot support 22 to move along the second direction L2. As shown in Figure 18, when the first rack 2381 and the second rack 2391 move in different directions and / or at different speeds, the differential gear 242 rotates, thereby driving the second component body 241 to rotate, causing the foot support 22 to swing. At the same time, the second component body 241 is driven by the vector sum of the speeds of the first rack 2381 and the second rack 2391, causing the foot support 22 to move linearly along the second direction L2.

[0034] This embodiment can also produce a gait that conforms to the natural walking gait of the human body, as shown in Figures 12 and 13.

[0035] The lower limb muscle strength training device of the present invention allows the foot support to move or swing relative to the pedal body in a second direction, thereby simulating the real gait of the human body by allowing the outward or inward rotation of the foot during walking, thus avoiding joint damage to the user.

[0036] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the present invention are still within the scope of the patent. Furthermore, no embodiment or claim of the present invention needs to achieve all the objectives, advantages, or features disclosed in the present invention. In addition, the abstract and headings are merely for assisting in patent document searches and are not intended to limit the scope of the present invention. Furthermore, the terms "first," "second," etc., used in this specification or claims are only used to name elements or implementation steps or to distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements, nor to limit the order in which the implementation steps are performed.

[0037] 1: Lower limb muscle strength training device 10: Base 11: Chassis 12: Support column 13: Support plate 14: Handrail 20: Pedal component 21: Pedal Body 22: Foot support 23: Swinging Mechanism 24: Connecting rod 25: Connector 30: Mounting bracket 31: Extending arm 40: Knee positioning component 41: Assembly slot 231: First Support Component 232: Second Support Component 233: First linkage component 234: First driving component 235: Second drive component 236: Third Support Component 237: Fourth Support Component 238: Third drive component 239: Fourth Drive Component 240: Second linkage component 241: Second Component Body 242: Differential gear 2311: First linear guide rail 2312: First slider 2321: Second linear guide rail 2322: Second slider 2331: First Component Body 2332: Rotating shaft 2341: Drive linear guide rail 2342: Slider 2343: First Electric Cylinder 2351: Second electric cylinder 2361: Third linear guide rail 2362: Third slider 2371: Fourth linear guide rail 2372: Fourth slider 2381: First rack 2382: First lead screw 2383: The First Motor 2391: Second rack 2392: Second lead screw 2393: Second Motor a: Axis L1: First direction L2: Second direction

Claims

1. A lower limb muscle strength training device, comprising: A base (10) includes two opposing support columns (12), each of which extends along a first direction (L1); And two pedal components (20), each pedal component (20) includes a pedal body (21), a foot support (22), a swing mechanism (23) and a link (24), the link (24) being pivotally connected to the support column (12) and rotating about an axis (a) extending along a second direction (L2), the pedal body (21) being fixed to the link (24), and the foot support (22) being oscillatingly connected to the pedal body (21) parallel to the second direction (L2) via the swing mechanism (23), the first direction (L1) being orthogonal to the second direction (L2).

2. The lower limb muscle strength training device as claimed in claim 1, wherein the swing mechanism (23) includes a first support component (231), a second support component (232), a first linkage component (233), a first drive component (234), and a second drive component (235), wherein the first support component (231) and the second support component (232) are arranged parallel to each other along the second direction (L2) on the pedal body (21), the first linkage component (233) is located between the first support component (231) and the second support component (232), the foot support (22) is disposed on the first linkage component (233), and the first support component (231) and the second support component (232) slidably support the opposite sides of the foot support (22). The foot support (22) is moved in opposite directions on opposite sides. The first drive assembly (234) reciprocates the foot support (22) along the second direction (L2). The second drive assembly (235) drives the first linkage assembly (233) to move along the second direction (L2).

3. The lower limb muscle strength training device as claimed in claim 2, wherein the first linkage component (233) includes a first component body (2331) and a pivot (2332), the first component body (2331) being connected to the foot support (22) and pivotally connected to the pivot (2332), and the second drive component (235) driving the pivot (2332) to move linearly along the second direction (L2).

4. The lower limb muscle strength training device as claimed in claim 2, wherein the first support component (231) includes a first linear slide rail (2311) and at least one first slider (2312) slidably connected to the first linear slide rail (2311), the first linear slide rail (2311) being disposed on the pedal body (21) and extending along the second direction (L2), and the at least one first slider (2312) being disposed on the foot support member (22); the second support component (232) includes a second linear slide rail (2321) and at least one second slider (2322) slidably connected to the second linear slide rail (2321), the second linear slide rail (2321) being disposed on the pedal body (21) and extending along the second direction (L2), and the at least one second slider (2322) being disposed on the foot support member (22).

5. The lower limb muscle strength training device as claimed in claim 2, wherein the first drive assembly (234) includes a drive linear slide rail (2341) extending along the second direction (L2), a slider (2342) slidably disposed on the drive linear slide rail (2341), and a first electric cylinder (2343) for driving the slider (2342) to move.

6. The lower limb muscle strength training device as claimed in claim 1, wherein the swing mechanism (23) includes a third support component (236), a fourth support component (237), a third drive component (238), a fourth drive component (239), and a second linkage component (240), wherein the third support component (236) and the fourth support component (237) are disposed parallel to the pedal body (21) along the second direction (L2), the second linkage component (240) is movably disposed between the third support component (236) and the fourth support component (237), the third drive component (238) and the fourth drive component (239) are respectively disposed on opposite sides of the second linkage component (240) and drive the second linkage component (240) to reciprocate or swing parallel to the second direction (L2), and the second linkage component (240) is connected to the foot support member (22).

7. The lower limb muscle strength training device as claimed in claim 6, wherein the pedal component (20) further includes a connector (25), wherein the second linkage assembly (240) includes a second assembly body (241) and a differential gear (242) pivotally connected to the second assembly body (241), the third drive assembly (238) includes a first rack (2381), and the fourth drive assembly (239) includes a second rack (2391). The first rack (2381) and the second rack (2391) are meshed with the differential gear (242). When the first rack (2381) and the second rack (2391) have a speed difference, the differential gear (242) rotates. The connecting member (25) is fixed to the foot support (22) and the differential gear (242), so that the foot support (22) and the differential gear (242) move or swing synchronously parallel to the second direction (L2).

8. The lower limb muscle strength training device as claimed in claim 7, wherein the third drive assembly (238) further includes a first lead screw (2382) and a first motor (2383) for driving the first lead screw (2382) to rotate, the first rack (2381) being screwed into the first lead screw (2382), and the rotation of the first lead screw (2382) causing the first rack (2381) to move parallel to the second direction (L2); the fourth drive assembly (239) further includes a second lead screw (2392) and a second motor (2393) for driving the second lead screw (2392) to rotate, the second rack (2391) being screwed into the second lead screw (2392), and the rotation of the second lead screw (2392) causing the second rack (2391) to move parallel to the second direction (L2).

9. The lower limb muscle strength training device as claimed in claim 8, wherein the third support component (236) includes a third linear slide rail (2361) extending along the second direction (L2) and a third slider (2362) sliding on the third linear slide rail (2361), and the fourth support component (237) includes a fourth linear slide rail (2371) extending along the second direction (L2) and a fourth slider (2372) sliding on the fourth linear slide rail (2371), the third slider (2362) and the fourth slider (2372) being fixedly connected to the second component body (241).

10. The lower limb muscle strength training device as claimed in claim 1, further comprising two mounting seats (30) and two knee positioning members (40), wherein each mounting seat (30) is connected to the linkage member (24), each knee positioning member (40) is movably disposed on one of the mounting seats (30) parallel to the second direction (L2) and located above the foot support member (22), each mounting seat (30) having an extension arm (31) extending along the second direction (L2), the knee positioning member (40) being movably coupled to the extension arm (31) and guided by the extension arm (31) to move along the second direction (L2).

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