Medical rehabilitation walking aid mechanism capable of assisting downhill

Abstract

The invention relates to the field of medical instruments, in particular to a medical rehabilitation walking aid mechanism capable of assisting in downhill. By arranging a limiting device and a control handle, walking wheels are controlled through the limiting device, so that the walking wheels can only move by a certain distance every time when walking on a slope, and the situation that the walking wheels are out of control and pushed too far during downhill is prevented; meanwhile, the walking wheels can be blocked after moving by a specified distance, so that the stability when the walking aid frame is pushed to support the user is ensured; by arranging the movable pull rod and the connecting piece, the driven gear on the limiting device can move up and down relative to the driving gear on the walking wheel, then the limiting device is controlled to be opened and closed, the whole walking aid mechanism can be normally used on the flat ground and can also be used on the downhill, and the adaptability of the walking aid mechanism to different terrains is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a walking aid for medical rehabilitation that can assist in going downhill. Background Art

[0002] Some middle-aged and elderly people who have difficulty walking or have difficulty walking after surgery need rehabilitation training. They use a single crutch. The crutch has a simple structure and no support device for the limbs. They are prone to fatigue when walking. It is not only unstable but also easy to cause uneven force on both sides of the legs. In addition, long-term use of crutches will habitually shift the center of gravity to one side, which will aggravate the symptoms of hunchback. This group of people need more rehabilitation training to restore limb mobility. The cycle is long and complicated, and often requires a caregiver. Wheelchairs have high requirements for road conditions, and the effect of rehabilitation training is limited. It cannot effectively restore the legs. Sitting in a wheelchair for a long time is not conducive to recovery. Because the patient's legs and feet are not flexible, when braking is needed, the feet may not be able to touch the brake pads on the universal wheel, and often need the help of caregivers, which increases the workload of caregivers and greatly reduces work efficiency.

[0003] There are two main types of walkers: wheelless and wheeled. The wheelless type can be moved forward gradually with both hands, has good stability, and the height can be adjusted at will according to the user's height. It is mainly used for patients with complete upper limb function and mild lower limb function damage. The wheeled walker has casters, and the walker never leaves the ground when walking. Due to the low friction resistance of the wheels, it is easy to push and move. It is suitable for users with lower limb dysfunction and who cannot lift the walker to walk. Although the wheeled walker mechanism eliminates the operation of lifting the walker and is easier to push, its stability is poor. If it encounters a downhill section, the stability will be greatly reduced, and there is a risk of losing control and falling. Summary of the invention

[0004] Therefore, the present invention is made in view of the above problems. The purpose of the present invention is to provide a limit device and a control handle, and to use the cooperation of the limit device and the control handle to realize the function that the walking wheel can only move a specified distance each time and then be locked, so as to solve the problem that the existing walking aid mechanism has low stability and easy loss of control when walking downhill. The present invention achieves the above purpose through the following technical solutions:

[0005] A walking aid mechanism for medical rehabilitation that can assist in going downhill, comprising a moving frame, a fixed pull rod, a movable pull rod, a control handle, a wire, a limiting device and walking wheels; there are two moving frames, arranged symmetrically left and right. The moving frame consists of a front leg part, a rear leg part and a cross bar part. Wherein, a first limiting groove, a second limiting groove and a limiting hole are provided at the bottom end of each front leg part; the fixed pull rod is fixedly connected between the front leg parts on the two moving frames, and a first magnet is provided at the lower part of both ends of the fixed pull rod; there are two movable pull rods, which are respectively movably installed between each front leg part and the rear leg part. A second magnet is also provided at the upper front side of each movable pull rod, and the second magnet can attract the corresponding first magnet on the fixed pull rod; there are two control handles, which are respectively fixedly installed at the lower ends of the two cross bar parts; there are two wires, which are respectively installed inside the two front leg parts; there are two limiting devices, which are respectively movably installed below each front leg part. The limiting device consists of a pull rod, a first spring, a limiting rod, a return pull rod, a cylindrical cam, a connecting piece, a driven gear, a limiting sleeve and a fastening cap; a third magnet is also provided at the right end of the pull rod, and the middle end of the pull rod inside the front leg part can be connected to the other end of the wire; the first spring is installed above the pull rod, the upper end of the first spring is fixed to the inside of the front leg part, and the lower end of the first spring presses against the pull rod.

[0006] Advantages of the present invention:

[0007] 1. By setting the limiting device and the control handle, and using the limiting device to control the walking wheels, when the walking wheels walk on the slope, they can only move a certain distance each time, preventing the walking wheels from getting out of control when being pushed downhill and being pushed too far, so that the user loses support and is in danger of tipping over. At the same time, the walking wheels will be locked after moving the specified distance, ensuring the stability of the walking aid when supporting the user after being pushed forward.

[0008] 2. By setting the movable pull rod and the connecting piece, the driven gear on the limiting device can move up and down relative to the driving gear on the walking wheel, thereby controlling the opening and closing of the limiting device, enabling the entire walking aid mechanism to be used normally on flat ground and also on downhill, greatly improving the adaptability of the walking aid mechanism to different terrains. Description of the drawings

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0010] Figure 2 It is a top view of the overall structure of the present invention.

[0011] Figure 3 It is Figure 2 The sectional view taken along line A-A in

[0012] Figure 4For Figure 2 Cross-sectional view along line B-B in

[0013] Figure 5 Partial structural schematic diagram of the present invention.

[0014] Figure 6 First exploded schematic diagram of partial structure of the present invention.

[0015] Figure 7 Second exploded schematic diagram of partial structure of the present invention.

[0016] Figure 8 Cross-sectional view of partial structure in the present invention.

[0017] Figure 9 Structural schematic diagram of the cylindrical cam in the present invention.

[0018] Figure 10 Structural schematic diagram of the limit sleeve housing in the present invention.

[0019] Explanation of reference numerals:

[0020] 100, moving frame; 110, front leg part; 111, first limit groove; 112, second limit groove; 113, limit hole; 120, rear leg part; 130, crossbar part; 200, fixed pull rod; 210, first magnet; 300, movable pull rod; 310, second magnet; 400, control handle; 500, wire; 600, limiting device; 610, pull rod; 611, third magnet; 620, first spring; 630, limiting rod; 631, cylindrical rod; 632, prismatic rod; 633, keyway; 640, return pull rod; 641, fourth magnet; 650, cylindrical cam; 651, inclined groove; 652, vertical groove; 653, first boss; 654, second boss; 655, through hole; 660, connecting piece; 670, driven gear; 680, limit sleeve housing; 681, key sleeve; 682, positioning cavity; 683, chuck; 684, second spring; 690, fastening cap; 700, traveling wheel; 710, wheel axle; 720, driving gear. Detailed implementation manners

[0021] In order to more clearly show the above-mentioned objects, features and advantages of the present invention, the following will elaborate on the specific implementation methods of the present invention in conjunction with the drawings. However, the implementation of the present invention is not limited to the specific manners described herein. Without departing from the core principles of the present invention, those skilled in the art can make corresponding adjustments and optimizations. Therefore, the protection scope of the present invention is not limited to the specific implementation details disclosed hereinafter.

[0022] As Figure 1As shown in the figure, a walking assistance mechanism for medical rehabilitation that can assist in going downhill according to the present invention includes: a moving frame 100, a fixed pull rod 200, a movable pull rod 300, a control handle 400, a wire 500, a limiting device 600, and a walking wheel 700;

[0023] As Figure 1 , 6 As shown in the figure, the number of the moving frames 100 is two, which are arranged symmetrically left and right. Each moving frame 100 has a U-shaped hollow tube structure. The moving frame 100 is composed of a front leg part 110, a rear leg part 120, and a cross bar part 130. A limiting groove one 111, a limiting groove two 112, and a limiting hole 113 are provided at the bottom end of each front leg part 110;

[0024] As Figures 1 to 3 As shown in the figure, the fixed pull rod 200 is fixedly connected between the front leg parts 110 of the two moving frames 100, and a magnet one 210 is provided at the lower part of both ends of the fixed pull rod 200;

[0025] The number of the movable pull rods 300 is two, which are respectively movably installed between each front leg part 110 and the rear leg part 120. A magnet two 310 is further provided at the upper front side of each movable pull rod 300, and the magnet two 310 can attract the corresponding magnet one 210 on the fixed pull rod 200;

[0026] The number of the control handles 400 is two, which are respectively fixedly installed at the lower ends of the two cross bar parts 130;

[0027] As Figure 3 , 4 As shown in the figure, the number of the wires 500 is two, which are respectively installed inside the two front leg parts 110, and the upper side of each wire 500 is connected to the corresponding control handle 400, so that when the handle of the control handle 400 is pulled upward, the wire 500 can move inside the front leg part 110;

[0028] As Figure 6 , 7 As shown in Figures 8, the number of the limiting devices 600 is two, which are respectively movably installed below each front leg part 110. The limiting device 600 is composed of a pull rod 610, a spring one 620, a limiting rod 630, a return pull rod 640, a cylindrical cam 650, a connecting member 660, a driven gear 670, a limiting sleeve 680, and a fastening cap 690;

[0029] The pull rod 610 is limitedly installed in the limiting groove 111 on the front leg part 110, and the pull rod 610 can only move up and down in the limiting groove 111. The pull rod 610 is an L-shaped rod as a whole. A magnet 3 611 is also provided at the right end of the pull rod 610. The pull rod 610 is located at the middle end of the front leg part 110 and can be connected to the other end of the pull wire 500. When the pull wire 500 moves upward, the pull wire 500 will drive the pull rod 610 to move upward relative to the limiting groove 111.

[0030] The spring 1 620 is installed above the pull rod 610, the upper end of the spring 1 620 is fixed to the inside of the front leg part 110, and the lower end of the spring 1 620 presses against the pull rod 610. When the pull rod 610 moves upward relative to the limiting groove 111, the pull rod 610 will compress the spring 1 620;

[0031] The limiting rod 630 is movably installed at the lower end of the pull rod 610. The limiting rod 630 is composed of a cylindrical rod 631, a prism rod 632 and a key groove 633. The limiting rod 630 is hollow inside. The end of the cylindrical rod 631 is provided with a key groove 633. The limiting rod 630 as a whole can be limitedly installed in the limiting groove 112 on the front leg part 110 through the prism rod 632, and the limiting rod 630 can only move up and down in the limiting groove 112.

[0032] The pull-back rod 640 is installed inside the limiting rod 630, and the pull-back rod 640 can both rotate and move inside the limiting rod 630. A magnet four 641 is provided at the right end of the pull-back rod 640, and the size of the magnet four 641 is the same as the magnet three 611 on the pull rod 610, but the polarity is opposite. When the limiting rod 630 and the pull rod 610 are both at the bottom of the limiting groove two 112 or the limiting groove one 111, the magnet four 641 at the right end of the pull-back rod 640 is staggered with the magnet three 611 on the pull rod 610, and the magnet three 611 is below the magnet four 641. When the pull rod 610 moves upward, the magnet three 611 on the pull rod 610 will gradually face the magnet four 641 and attract the magnet four 641 to move in the direction of the magnet three 611.

[0033] like Figure 7 , 8As shown in Figs. 9, the columnar cam 650 is rotatably mounted on the limit rod 630. The circumferential wall of the columnar cam 650 is provided with a limit notch formed by sequentially and circularly connecting a plurality of inclined grooves 651 and vertical grooves 652. The depth of the connection at the lower end of the inclined groove 651 and the vertical groove 652 is lower than the depth of the vertical groove 652, and the connection at the upper end of the inclined groove 651 and the vertical groove 652 is smoothly connected. On the inner end face of the columnar cam 650, there is also a first boss 653 and a second boss 654. The columnar cam 650 also has a through hole 655 inside. The columnar cam 650 is integrally rotatably mounted on the cylindrical rod 631 on the limit rod 630 through the through hole 655;

[0034] One end of the connecting member 660 is rotatably mounted on the first boss 653 on the columnar cam 650, and the other end is fixedly mounted on the lower part of the front end of the movable pull rod 300. The driven gear 670 is fixedly mounted on the second boss 654 on the columnar cam 650;

[0035] As Figure 6 、 7 As shown in Figs. 8 and 10, the limit sleeve 680 is movably sleeved on the outside of the columnar cam 650. The limit sleeve 680 is composed of a key sleeve 681, a positioning cavity 682, a chuck 683 and a second spring 684. The key sleeve 681 is mounted on the end face outside the limit sleeve 680, and the key sleeve 681 can be engaged with the key groove 633 on the limit rod 630. The limit sleeve 680 as a whole can be movably mounted on the cylindrical rod 631 on the limit rod 630 through the engagement of the key sleeve 681 and the key groove 633 on the limit rod 630. Two positioning cavities 682 are symmetrically arranged on the outer circumference of the limit sleeve 680. The chuck 683 is movably mounted inside the positioning cavity 682. A second spring 684 is also mounted between the top of the chuck 683 and the top of the positioning cavity 682. Under the action of the second spring 684, the bottom end of the chuck 683 will tightly press against the inclined groove 651 or the vertical groove 652 on the columnar cam 650,

[0036] As Figure 6 、 7 As shown in Fig. 8, the fastening cap 690 is mounted outside the key sleeve 681, and the fastening cap 690 can be connected to the other end of the magnet four 641 on the return pull rod 640 through threads;

[0037] The traveling wheel 700 is rotatably mounted in the limit hole 113 below the front leg part 110 through a wheel shaft 710. A driving gear 720 is also fixedly mounted at the end of the wheel shaft 710 on the traveling wheel 700, and the driving gear 720 can be engaged with the driven gear 670 when the limit rod 630 is at the bottommost end of the second limit groove 112.

[0038] The working principle of the present invention:

[0039] When walking on flat ground, the movable pull rod 300 is in the lifted state, that is, the magnet two 310 at the front end of the movable pull rod 300 is in contact with the magnet one 210 on the fixed pull rod 200, and the entire limiting device 600 is connected to the movable pull rod 300 through the connecting member 660, so that the limiting device 600 is also in the lifted state. When in the lifted state, the pull rod 610 on the limiting device 600 is at the lowermost end of the first limiting groove 111, and the limiting rod 630 is at the uppermost end of the second limiting groove 112. The driven gear 670 is disengaged from the driving gear 720 on the walking wheel 700. At this time, when the walking aid mechanism moves forward, the driving gear 720 on the walking wheel 700 will no longer drive the entire limiting device 600. When going downhill, the user presses the movable pull rod 300 downward, so that the magnet two 310 on the movable pull rod 300 overcomes the magnetic force of the magnet one 210 on the fixed pull rod 200 and moves downward. When the movable pull rod 300 moves, it will drive the limiting rod 630 to move downward through the connecting member 660 until the limiting rod 630 moves to the lowermost end of the second limiting groove 112, and then the movable pull rod 300 stops moving. At this time, the driven gear 670 on the limiting device 600 will be engaged with the driving gear 720 on the walking wheel 700. Then, pull the control handle 400 upward with both hands at the same time, so that the control handle 400 drives the pull rod 610 to move upward relative to the first limiting groove 111 through the wire 500 and compresses the first spring 620, so that the magnet three 611 on the pull rod 610 moves to the front of the magnet four 641 on the return pull rod 640. Then, the return pull rod 640 is moved toward the magnet three 611 by the attraction force between the magnet three 611 and the magnet four 641. At the same time, the return pull rod 640 will drive the limiting sleeve 680 to move backward along the key groove 633 through the fastening cap 690. When the positioning cavity 682 on the limiting sleeve 680 moves from the vertical groove 652 to the inclined groove 651, the return pull rod 640 stops moving. At this time, the clamping head 683 is clamped into the inclined groove 651 under the elastic force of the second spring 684. Then, release the control handle 400, and the pull rod 610 returns under the elastic force of the first spring 620. Then, push the walking aid mechanism forward on the downhill. Then, the walking wheel 700 will rotate, and at the same time, the walking wheel 700 will drive the driven gear 670 to rotate through the driving gear 720, and then drive the cylindrical cam 650 to rotate. When the cylindrical cam 650 rotates, the clamping head 683 on the limiting sleeve 680 will be pushed by the inclined groove 651 on the cylindrical cam 650. Since the key sleeve 681 on the limiting sleeve 680 is engaged with the key groove 633 on the limiting rod 630, the limiting sleeve 680 cannot rotate. Therefore, the clamping head 683 will drive the entire limiting sleeve 680 to move outward along the limiting rod 630, and at the same time, the clamping head 683 compresses the second spring 684. When the clamping head 683 moves from the inclined groove 651 to the next vertical groove 652, the clamping head 683 can no longer move along the inclined groove 651, so that the walking wheel 700 can no longer rotate. At this time, no matter how much thrust the walking aid mechanism receives, the walking wheel 700 cannot rotate.It ensures that the walking assistance mechanism can move a specified displacement each time, preventing it from being pushed too far out of control when pushing the walking assistance mechanism due to going downhill, which may cause the user to lose support and be in danger of tipping over. At the same time, it ensures the stability of the walking frame when supporting the user after propulsion. When the user completes one support and propulsion and wants to push the walking assistance mechanism again, similarly, pull up the control handle 400, then let it go, then push and walk again, and repeat this process to complete walking downhill.

Claims

1. A medical rehabilitation walking aid mechanism capable of assisting downhill walking, comprising a moving frame (100), a fixed pull rod (200), a movable pull rod (300), a control handle (400), a pull wire (500), a limit device (600) and a walking wheel (700); characterized in that: There are two movable frames (100) arranged symmetrically on the left and right. The movable frames (100) are composed of a front leg portion (110), a rear leg portion (120) and a cross bar portion (130), wherein each front leg portion (110) is provided with a first limiting groove (111), a second limiting groove (112) and a limiting hole (113) at the bottom end; the fixed pull rod (200) is fixedly connected between the front leg portions (110) on the two movable frames (100), and the fixed pull rod (200) ) is provided with a magnet one (210) at the lower part of both ends; the movable pull rods (300) are two in number, and are movably installed between each front leg part (110) and the rear leg part (120); each movable pull rod (300) is also provided with a magnet two (310) at the upper end of the front side, and the magnet two (310) can attract the corresponding magnet one (210) on the fixed pull rod (200); the control handles (400) are two in number, and are fixedly installed on the two The lower end of a crossbar portion (130); the pull wire (500) is two in number and is respectively installed inside the two front leg portions (110); the limit device (600) is two in number and is movably installed under each front leg portion (110), and the limit device (600) is composed of a pull rod (610), a spring (620), a limit rod (630), a pull rod (640), a columnar cam (650), a connecting piece (660), and a driven gear (67 0), a limiting sleeve (680) and a fastening cap (690); a magnet three (611) is also provided at the right end of the pull rod (610), and the pull rod (610) is located at the middle end of the front leg part (110) and can be connected to the other end of the pull wire (500); the spring one (620) is installed above the pull rod (610), the upper end of the spring one (620) is fixed to the inside of the front leg part (110), and the lower end of the spring one (620) is pressed against the pull rod (610).

2. A medical rehabilitation walking aid capable of assisting downhill walking according to claim 1, characterized in that: The limit rod (630) is movably mounted on the lower end of the pull rod (610), the pull-back rod (640) is mounted inside the limit rod (630), and the pull-back rod (640) can both rotate and move inside the limit rod (630), and a magnet (641) is provided at the right end of the pull-back rod (640). The cylindrical cam (650) is rotatably mounted on the limit rod (630), and a limit slot is provided on the peripheral wall of the cylindrical cam (650), which is connected in a circular manner by a plurality of inclined slots (651) and vertical slots (652); the inner end surface of the cylindrical cam (650) is also provided with a There is a boss one (653) and a boss two (654), and the interior of the cylindrical cam (650) also has a through hole (655) therethrough, and the cylindrical cam (650) as a whole is rotatably mounted on the cylindrical rod (631) on the limiting rod (630) through the through hole (655); one end of the connecting member (660) is rotatably mounted on the boss one (653) on the cylindrical cam (650), and the other end is fixedly mounted on the lower front end of the movable pull rod (300), and the driven gear (670) is fixedly mounted on the boss two (654) on the cylindrical cam (650).

3. The medical rehabilitation walking aid capable of assisting downhill walking according to claim 1, characterized in that: The upper side of each pull wire (500) is connected to the corresponding control handle (400), so that when the handle of the control handle (400) is pulled upward, the pull wire (500) can move in the front leg part (110).

4. The medical rehabilitation walking aid capable of assisting downhill walking according to claim 1, characterized in that: The pull rod (610) is installed in a limiting groove (111) on the front leg part (110), and the pull rod (610) can only move up and down in the limiting groove (111), and the pull rod (610) is an L-shaped rod as a whole.

5. The medical rehabilitation walking aid capable of assisting downhill walking according to claim 2, characterized in that: The limiting rod (630) is composed of a cylindrical rod (631), a prism rod (632) and a key groove (633), and the inside of the limiting rod (630) is hollow. The end of the cylindrical rod (631) is provided with a key groove (633). The limiting rod (630) as a whole can be installed in the limiting groove 2 (112) on the front leg part (110) through the prism rod (632), and the limiting rod (630) can only move up and down in the limiting groove 2 (112).

6. The medical rehabilitation walking aid capable of assisting downhill walking according to claim 2, characterized in that: The size of the magnet four (641) is the same as that of the magnet three (611) on the pull rod (610), but the polarity is opposite.

7. The medical rehabilitation walking aid capable of assisting downhill walking according to claim 2, characterized in that: The depth of the connection between the lower ends of the inclined groove (651) and the vertical groove (652) is lower than the depth of the vertical groove (652), and the connection between the upper ends of the inclined groove (651) and the vertical groove (652) is a smooth connection.

8. The medical rehabilitation walking aid capable of assisting downhill walking according to claim 2, characterized in that: The limiting sleeve (680) is movably mounted on the outer side of the cylindrical cam (650), and the limiting sleeve (680) is composed of a key sleeve (681), a positioning cavity (682), a clamping head (683) and a second spring (684), wherein the key sleeve (681) is installed on the end surface of the outer side of the limiting sleeve (680), and the key sleeve (681) can be engaged with the key slot (633) on the limiting rod (630), and the limiting sleeve (680) as a whole can be engaged with the key slot (633) on the limiting rod (630) through the key sleeve (681) and the key slot (633) on the limiting rod (630). The cylindrical rod (631) is meshed and movably mounted on the limiting rod (630). Two positioning cavities (682) are symmetrically arranged on the outer circumference of the limiting sleeve (680). A clamping head (683) is movably mounted inside the positioning cavity (682). A second spring (684) is also mounted between the top of the clamping head (683) and the top of the positioning cavity (682). Under the action of the second spring (684), the bottom end of the clamping head (683) is tightly pressed against the inclined groove (651) or the vertical groove (652) on the cylindrical cam (650).

9. The medical rehabilitation walking aid capable of assisting downhill walking according to claim 8, characterized in that: The fastening cap (690) is installed on the outside of the key sleeve (681), and the fastening cap (690) can be connected to the other end of the magnet four (641) on the pull-back rod (640) through a thread.

10. The medical rehabilitation walking aid capable of assisting downhill walking according to claim 2, characterized in that: The walking wheel (700) is rotatably mounted in a limiting hole (113) below the front leg portion (110) via a wheel axle (710); a driving gear (720) is also fixedly mounted at the end of the wheel axle (710) on the walking wheel (700); and the driving gear (720) can mesh with the driven gear (670) when the limiting rod (630) is at the bottom end of the limiting groove (112).

Images