Walking aid convenient to fold and unfold

Abstract

The utility model discloses a rollator convenient to fold and unfold, which comprises vertical supports, front and rear wheel supports and folding large joints, the front and rear wheel supports are divided into two groups and are arranged in parallel, each group of front and rear wheel supports is provided with the vertical support through the folding large joint, the top of each vertical support is provided with a grip, and the grip is provided with a handle. An X-shaped folding rod is mounted between the two vertical brackets; the large folding joint is formed by rotationally connecting two joint bases, the two joint bases are installed on the vertical support and the front and rear wheel support respectively, and an elastic locking assembly is arranged between the two joint bases. When the vertical support is not intervened by the outside world, the locking state (the vertical support is vertical and the vertical support is in a folded state attached to the front wheel support and the rear wheel support) is maintained, and when the vertical support is intervened by human force, the vertical support is in the locking state immediately.

Description

Technical Field

[0001] This utility model relates to the field of walking aid equipment, specifically to a walking aid that is easy to fold and unfold. Background Technology

[0002] Currently, most walking aids on the market can be folded. However, they are mainly divided into left and right sections, supported by an X-shaped folding rod. The protrusion at the bottom of the X-shaped folding rod engages with the front and rear wheel supports. Because the X-shaped folding rod is mounted on a vertical support, the vertical support cannot rotate. Therefore, when the X-shaped folding rod is unfolded, the vertical support locks in place. To fold, the left and right sections of the walking aid are closed, causing the X-shaped folding rod to fold. The protrusion at the bottom of the X-shaped folding rod separates from the front and rear wheel supports, allowing the vertical support to swing downwards to complete the fold. This structure has a flaw: when the X-shaped folding rod is folded, the vertical support swings downwards under its own weight and comes into contact with the front and rear wheel supports, failing to maintain the vertical orientation of the vertical support when the X-shaped folding rod is folded. Furthermore, even when the vertical support is in contact with the front and rear wheel supports, it can still swing, making the folded state unstable. Utility Model Content

[0003] In view of the shortcomings of the prior art, this utility model proposes a walking aid that is easy to fold and unfold, and makes it easy to maintain the stability of the folded state when folding.

[0004] To achieve the above objectives, the present invention provides a walking aid that is easy to fold and unfold, comprising a vertical support, front and rear wheel supports, and a folding joint. The front and rear wheel supports are divided into two groups and the two groups of front and rear wheel supports are arranged in parallel. A vertical support is installed on each group of front and rear wheel supports through the folding joint. A handle is installed on the top of the vertical support. An X-shaped folding rod is installed between the two vertical supports. A locking component is provided between the X-shaped folding rod and the front and rear wheel supports. A front wheel and a rear wheel are installed at the front and rear ends of the front and rear wheel supports. A braking mechanism is provided on the rear wheel.

[0005] The folding joint is formed by rotating two sets of joint seats. The two sets of joint seats are respectively installed on the vertical support and the front and rear wheel supports. An elastic locking component is set between the two sets of joint seats to lock the joint seats. When the joint seats are rotated under force, the elastic locking component releases the lock between the joint seats.

[0006] Preferably, one of the joint seats has a through hole for embedding the elastic locking component, and the other joint seat has two limiting grooves. When the elastic locking component is opposite to the limiting groove, the elastic locking component extends into the limiting groove. The elastic locking component includes a locking pin and a spring. The spring and the locking pin are embedded in the through hole. One end of the spring abuts against the bottom of the through hole, and the other end of the spring abuts against the locking pin.

[0007] Preferably, the locking pin is a cylinder that fits into the inside of the through hole, and the top of the locking pin is a hemisphere, with the diameter of the limiting groove being smaller than the diameter of the top hemisphere of the locking pin.

[0008] Preferably, the locking pin is a sphere and fits against the inner wall of the through hole, and the diameter of the limiting groove is smaller than the diameter of the locking pin.

[0009] Preferably, the braking mechanism includes a brake seat, a fixing block, and a locking bolt. The fixing block is installed on the front and rear wheel brackets near the rear wheel end. A sliding groove is opened on the fixing block for the brake seat to be inserted. The brake seat slides back and forth in the sliding groove. The locking bolt passes through the fixing block and extends into the sliding groove of the fixing block. The locking bolt and the fixing block are rotatably engaged. A threaded hole is opened on the brake seat, and the locking bolt extends into the bolt hole of the brake seat. The length of the brake seat extending out of the sliding groove is adjusted by rotating the locking bolt.

[0010] Preferably, the braking mechanism includes a brake lever, a brake cable, and a brake block. The brake lever is installed at the grip and connected to the brake cable. The brake block is installed on the front and rear wheel brackets near the rear wheel and connected to the brake cable. A brake cable mounting bracket is installed on the front and rear wheel brackets. The steel cable of the brake cable passes through the brake cable mounting bracket and is connected to the brake block. A compression spring is sleeved on the steel cable between the brake cable mounting bracket and the brake block.

[0011] Preferably, the locking assembly includes a first locking block and a limiting block. A limiting block is provided on the inner side of the bottom of the front and rear wheel brackets. The limiting block is located below the folding large joint. A first locking block is provided at the bottom of the X-shaped folding rod. When the X-shaped folding rod is unfolded, the first locking block abuts against the limiting block. A limiting assembly is provided on the front and rear wheel brackets to limit the forward swing of the vertical bracket.

[0012] Preferably, the rear wheel is mounted at the middle of the rear end of the front and rear wheel brackets.

[0013] Preferably, a support rod is fixed at the top of both ends of the X-shaped folding rod, a support block is fixed inside the vertical bracket to support the support rod, a connecting rod is hinged between the support rod and the X-shaped folding rod, a rotatable hook is installed on one of the connecting rods, a straight rod is fixed on the X-shaped folding rod, the hook is hung on the straight rod by rotation, an arc-shaped groove is opened on the connecting rod, and a slider extending into the arc-shaped groove is fixed on the hook.

[0014] Preferably, each support rod has a notch for inserting a round rod.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] 1. When there is no external intervention, the vertical support remains locked (the vertical support is upright and folded in contact with the front and rear wheel supports). When subjected to human intervention, the locking state is immediately released.

[0017] 2. When the X-shaped folding rod is unfolded, multiple vertical supports are used to lock it in place;

[0018] Third, it can brake the rear wheels;

[0019] 4. When the X-shaped folding rod is unfolded, lock the X-shaped folding rod to ensure the stability of the structure during use. Attached Figure Description

[0020] Figure 1 This is a right view of Embodiment 1 of the present utility model.

[0021] Figure 2 This is a rear view of Embodiment 1 of the present utility model.

[0022] Figure 3 This is a schematic diagram of the folding large joint in Embodiment 1 of this utility model.

[0023] Figure 4 This is a schematic diagram of the folding large joint with a joint seat removed in Embodiment 1 of this utility model.

[0024] Figure 5 This is a cross-sectional view of the folding large joint of Embodiment 1 of this utility model (the locking pin is a cylindrical body).

[0025] Figure 6 This is a cross-sectional view of the folding large joint of Embodiment 1 of this utility model (the locking pin is a ball).

[0026] Figure 7 This is a schematic diagram of the braking mechanism and front and rear wheel supports according to Embodiment 1 of this utility model.

[0027] Figure 8 This is a cross-sectional view of the braking mechanism according to Embodiment 1 of this utility model.

[0028] Figure 9 This is a schematic diagram of the locking groove on the front and rear wheel brackets in Embodiment 1 of this utility model.

[0029] Figure 10 This is a cross-sectional view of the lock groove and the second lock block in Embodiment 1 of this utility model.

[0030] Figure 11 This is a right view of Embodiment 2 of the present invention.

[0031] Figure 12 This is a rear view of Embodiment 2 of the present invention.

[0032] Figure 13 This is a schematic diagram of the front and rear wheel brackets and locking components in Embodiment 2 of this utility model.

[0033] Figure 14 This is a schematic diagram of the first locking block, the limiting block, and the limiting component in Embodiment 2 of this utility model.

[0034] Figure 15 This is a schematic diagram of the braking mechanism in Embodiment 2 of this utility model.

[0035] Figure 16 This is a schematic diagram of the guide block and brake block of the brake mechanism in Embodiment 2 of this utility model.

[0036] Figure 17 This is a schematic diagram of the cloth and support rod of this utility model.

[0037] Figure 18 This is a schematic diagram of the hook and arc groove of this utility model.

[0038] The components are as follows: 1. Vertical support; 2. Front and rear wheel supports; 3. Folding large joint; 4. Joint seat; 5. Elastic locking assembly; 6. Through hole; 7. Limiting groove; 8. Locking pin; 9. Spring; 10. Front wheel; 11. Rear wheel; 12. Handle; 13. X-shaped folding rod; 14. Support rod; 15. Support block; 16. Connecting rod; 17. Hook; 18. Straight rod; 19. Arc groove; 20. Slider; 21. Notch; 22. Locking assembly; 23. First locking block; 24. Limiting block; 25. Limiting assembly; 26. Braking mechanism; 27. Brake handle; 28. Brake cable; 29. ​​Brake block; 31. Brake cable fixing seat; 32. Compression spring; 33. Brake seat; 34. Fixing block; 35. Locking bolt; 37. Stop block; 38. Placement cloth; 39. Guide block; 40. Locking groove; 41. Second locking block. Detailed Implementation

[0039] The present invention will now be further described with reference to the accompanying drawings.

[0040] Example 1: As Figure 1-10As shown in Figures 17-18, a walking aid that is easy to fold and unfold includes a vertical support 1, front and rear wheel supports 2, and a folding joint 3. The front and rear wheel supports 2 are divided into two groups, and the two groups of front and rear wheel supports 2 are arranged parallel to each other. A vertical support 1 is installed near the front end of each group of front and rear wheel supports 2 via the folding joint 3. The vertical support 1 can rotate relative to the front and rear wheel supports 2, thus realizing folding and unfolding. A backward-curving handle 12 is installed on the top of the vertical support 1 by bolts. When in use, the user holds the handle 12, and the vertical support 1 supports the user. An X-shaped folding rod 13 (the X-shaped folding rod 13 is formed by hinged joints of two rods in the middle to form an X shape) is installed between the two vertical supports 1. A locking component 22 is provided between the bottom of the X-shaped folding rod 13 and the front and rear wheel supports 2. The second locking block 41 and the locking groove 40 are fixed at both ends of the X-shaped folding rod 13 at the bottom by welding. The locking groove 40 is opened on the front and rear wheel 11 bracket 2 for the first locking block 23 to be inserted. The bottom of the X-shaped folding rod 13 is hinged to the bottom of the vertical bracket 1. When the X-shaped folding rod 13 is unfolded, the second locking block 41 is inserted into the locking groove 40, so the vertical bracket 1 cannot rotate relative to the front and rear wheel 11 bracket 2. When the X-shaped folding rod 13 is folded, the second locking block 41 is disengaged from the locking groove 40 to complete the unlocking, so the vertical bracket 1 can be folded. When the X-shaped folding rod 13 is opened, the locking component 22 locks the vertical bracket 1 on the front and rear wheel 11 bracket 2. The front wheel 10 and the rear wheel 11 are installed at the front and rear ends of the front and rear wheel 11 bracket 2. The rear wheel 11 is provided with a braking mechanism 26, which brakes the rear wheel 11.

[0041] The folding joint 3 is formed by rotating two sets of joint seats 4 (the two joint seats 4 have coaxial holes at their centers, and a rotating shaft is inserted into the holes to achieve the rotational connection of the two joint seats 4). The two sets of joint seats 4 are integrally molded and respectively installed on the vertical support 1 and the front and rear wheel 11 support 2, thus achieving the rotational connection between the vertical support 1 and the front and rear wheel 11 support 2. An elastic locking component 5 is set between the two sets of joint seats 4 to lock the joint seats 4, so that the vertical support 1 and the front and rear wheel 11 support 2 will not rotate relative to each other. When the joint seats 4 are rotated under force, the elastic locking component 5 releases the lock between the joint seats 4, so that relative rotation can be performed for folding and unfolding.

[0042] One of the joint seats 4 has a through hole 6 for embedding an elastic locking component 5, and the other joint seat 4 has two limiting grooves 7. When the elastic locking component 5 is opposite to the limiting groove 7, the elastic locking component 5 extends into the limiting groove 7. The elastic locking component 5 includes a locking pin 8 and a spring 9. The spring 9 and the locking pin 8 are embedded in the through hole 6. There are two types of locking pins 8, both of which can be used. One type of locking pin 8 is a cylinder that fits into the inside of the through hole 6, and the top of the locking pin 8 is a hemisphere. The diameter of the limiting groove 7 is smaller than the diameter of the top hemisphere of the locking pin 8. The other type of locking pin 8 is a sphere and fits into the inner wall of the through hole 6. The diameter of the spring 9 is smaller than the diameter of the locking pin 8; one end of the spring 9 abuts against the bottom of the through hole 6, and the other end of the spring 9 abuts against the locking pin 8. The locking pin 8 is pushed outward by the spring 9. When the through hole 6 is not connected to the limiting groove 7, the locking pin 8 is in contact with the side of the joint seat 4. When the vertical bracket 1 is rotated, the two joint seats 4 rotate relative to each other. When the through hole 6 is aligned with the limiting groove 7, the locking pin 8 in the through hole 6 enters into the limiting groove 7. The depth of the limiting groove 7 is less than the radius of the top sphere or hemisphere of the locking pin 8. In this way, the position of the locking pin 8 entering the limiting groove 7 does not reach the hemisphere. When the joint seat 4 is manually moved, the locking pin 8 can be pressed down. The locking pin 8 separates from the limiting groove 7 within the through hole 6. When the vertical support 1 is not under force, the locking pin 8 is simultaneously located within both the limiting groove 7 and the through hole 6, thus locking the joint seat 4 and preventing relative rotation. When the vertical support 1 is manually moved, because the locking pin 8 enters the limiting groove 7 at a position less than a hemisphere, the limiting groove 7 slides along the spherical surface of the locking pin 8. This causes the locking pin 8 to press into the through hole 6 and exit the limiting groove 7, allowing relative rotation between the joint seats 4. When the X-shaped folding rod 13 is folded, the locking state between the vertical support 1 and the front and rear wheel 11 support 2 is released, but there is no need to move the vertical support 1 towards... When the vertical support 1 is lowered, since the limiting groove 7 and the through hole 6 are opposite each other at this position, the locking pin 8 enters the limiting groove 7 and the through hole 6 when the vertical support 1 is not manually swung downwards, thus locking the position. When the vertical support 1 needs to swing downwards, it is swung downwards, so the locking pin 8 exits the limiting groove 7. At the same time, the joint seat 4 rotates relative to each other. When the vertical support 1 is in contact with the front and rear wheel 11 support 2, the through hole 6 is opposite to and connected with another limiting hole, and the locking pin 8 extends into the limiting groove 7 to lock it, preventing the vertical support 1 from continuing to swing after folding. This achieves the locking of the vertical support 1 when it swings to the two positions.

[0043] The diagram shows the rear wheel 11 mounted on the outer side of the front and rear wheel 11 bracket 2 via bearings.

[0044] The braking mechanism 26 includes a brake seat 33, a fixing block 34, and a locking bolt 35. The fixing block 34 is installed on the outer surface of the front and rear wheel 11 bracket 2 near the rear wheel 11 end by bolts. A sliding groove is formed on the fixing block 34 for the brake seat 33 to be inserted, with the groove facing the rear wheel 11. The brake seat 33 slides back and forth within the sliding groove. The locking bolt 35 passes through the fixing block 34 and extends into the sliding groove. Two retaining rings are formed on the locking bolt 35, and limit rings are inserted into these grooves. The two limit rings are positioned against the wall of the fixing seat to prevent the locking bolt 35 from moving back and forth. The locking bolt 35 and the fixing block 34 are rotatably engaged. A threaded hole is formed on the brake seat 33, into which the locking bolt 35 extends. The locking bolt 35 engages with the bolt hole thread. By rotating the locking bolt 35, the length of the brake seat 33 extending out of the slide groove is adjusted. The rotation of the locking bolt 35 causes the brake seat 33 to move backward and press against the outer wall of the rear wheel 11, thus achieving braking. When braking is not needed, the locking bolt 35 is turned in the opposite direction, so that the length of the locking bolt 35 extending into the slide groove becomes shorter. Under the action of the locking bolt 35, the brake seat 33 retracts into the slide groove and separates from the rear wheel 11, thus losing the braking state and allowing the walking aid to move. When only standing practice and going uphill or downhill are needed, the braking mechanism 26 needs to lock the rear wheel 11 to prevent the walking aid from moving. When practicing walking on flat ground, the rear wheel 11 is released from the braking state.

[0045] Support rods 14 are welded to the top of both ends of the X-shaped folding rod 13. Support blocks 15, which hold the support rods 14, are bolted to the inner side of the vertical brackets 1 near the top, preventing the support rods 14 from swinging downwards. This limits the spacing between the vertical brackets 1. A connecting rod 16 is hinged between the support rods 14 and the X-shaped folding rod 13. The connection point between the connecting rod 16 and the X-shaped folding rod 13 serves as the fulcrum of the X-shaped folding rod 13, ensuring its strength and preventing deformation due to excessive torque when subjected to external forces, as the top of the folding rod lacks a fulcrum. A rotatable hook 17 is installed on one of the connecting rods 16. A straight rod 18 is fixed to the X-shaped folding rod 13 (with an opening near the top left end of the X-shaped folding rod 13). A hole is provided, into which a straight rod 18 is inserted (the straight rod 18 is interference-fitted with the hole). A hook 17 is hung on the straight rod 18 by rotation. An arc-shaped groove 19 is provided on the connecting rod 16. A slider 20 is fixed to the hook 17 and extends into the arc-shaped groove. The arc-shaped groove and the slider 20 limit the rotation angle of the hook 17. When the X-shaped folding rod 13 is fully unfolded, the hook 17 is rotated counterclockwise and hooked on the straight rod 18. This prevents the top of the X-shaped folding rod 13 from swinging upward. The support block 15 restricts the downward movement of the X-shaped folding rod 13, thus locking the X-shaped folding rod 13. When it is necessary to fold the X-shaped folding rod 13, the hook 17 is swung clockwise and disengaged from the straight rod 18. This allows the top of the X-shaped folding rod 13 to swing upward, thus enabling folding.

[0046] Each support rod 14 has a notch 21 for inserting a round rod. A cloth 38 can be placed between two support rods 14. The two ends of the cloth 38 are fixed to the two round rods by rivets. Each round rod is inserted into the notch 21 of the support rod 14 and can be disassembled when not needed.

[0047] Example 2: Figure 11-16 As shown, except for the following structural differences, the other structures are the same as in Embodiment 1. The rear wheel 11 is installed in the middle of the rear end of the front and rear wheel 11 bracket 2. The rear wheel 11 is mounted on the wheel fork through a bearing. The other end of the wheel fork is connected to the rear end of the front and rear wheel 11 bracket 2 through a bolt. In this way, the rear wheel 11 is located in the middle of the front and rear wheel 11 bracket 2, which can effectively prevent the two rear wheels 11 from tilting outward (the force on the tire and the force on the front and rear wheel 11 bracket 2 are on the same vertical axis).

[0048] The locking assembly 22 includes a first locking block 23 and a limiting block 24. The limiting block 24 is fixed to the inner side of the bottom of the front and rear wheel 11 bracket 2 by bolts. The limiting block 24 is located below the folding large joint 3. The first locking block 23 is fixed to the bottom of the X-shaped folding rod 13 by bolts. The hinge point between the X-shaped folding rod 13 and the vertical bracket 1 is located above the first locking block 23. When the X-shaped folding rod 13 is unfolded, the first locking block 23 abuts against the limiting block 24. A limiting assembly 25 is provided on the front and rear wheel 11 bracket 2 to limit the forward swing of the vertical bracket 1. 5 is the stop block 37. The stop block 37 is integrally formed (cast) and set on the inner side of the front and rear wheels 11 near the front end. When the vertical support 1 swings upward and fits against the rear end of the stop block 37, the vertical support 1 cannot continue to swing. The stop block 37 has a groove that fits against the outer wall of the vertical support 1. When the X-shaped folding rod 13 is unfolded, the front end face of the first locking block 23 fits against the rear end face of the limiting block 24. In this way, when the X-shaped folding rod 13 is unfolded, the vertical support 1 cannot swing downward, thus achieving locking without the need to make holes in the bracket 2 of the front and rear wheels 11.

[0049] The braking mechanism 26 includes a brake lever 27, a brake cable 28, and a brake pad 29. The brake lever 27 is installed at the handlebar 12 (its structure is identical to that of a bicycle handlebar 12 and brake lever 27; the brake lever 27 is brought closer to the handlebar 12 by gripping). The brake lever 27 is connected to the brake cable 28 (the connection method is the same as that of current bicycle brake cables 28 and brake lever 27, which is existing technology). The brake pad 29 is installed on the front and rear wheel brackets 2 near the rear wheel 11. The brake pad 29 is connected to the brake cable 28. The two ends of the steel cable inside the brake cable 28 are fixed with threaded connectors by welding. The threaded connectors extend into threaded holes to achieve a fixed connection with the brake lever 27 and the brake pad 29. A brake cable fixing seat 31 is bolted to the front and rear wheel brackets 2, through which the steel cable of the brake cable 28 passes and is fixed. The seat 31 is connected to the brake block 29. A compression spring 32 is sleeved on the steel cable between the brake cable fixing seat 31 and the brake block 29. The brake block 29 is slidably connected to the front and rear wheel 11 bracket 2. A long hole is opened through the center of the brake block 29. A guide block 39 is embedded in the long hole. The guide block 39 is fixed to the front and rear wheel 11 bracket 2 by bolts. The cross-section of the long hole is a convex hole. The cross-section of the guide block 39 is the same as the convex block. The guide block 39 is shorter than the long hole and the outer wall of the guide block 39 fits against the inner wall of the long hole. In this way, the brake block 29 moves back and forth along the guide block 39. When the brake lever 12 is not pressed, the compression spring 32 presses the brake block 29 backward onto the rear wheel 11, thus achieving braking and deceleration. When the rear wheel 11 needs to roll, the brake handle 27 is pressed close to the handle 12 to separate the rear wheel 11 from the brake block 29.

Claims

1. A walking aid that is easy to fold and unfold, comprising a vertical support, front and rear wheel supports and a folding joint, wherein the front and rear wheel supports are divided into two groups and the two groups of front and rear wheel supports are arranged in parallel, a vertical support is installed on each group of front and rear wheel supports through the folding joint, a handle is installed on the top of the vertical support, an X-shaped folding rod is installed between the two vertical supports, a locking component is provided between the X-shaped folding rod and the front and rear wheel supports, a front wheel and a rear wheel are installed at the front and rear ends of the front and rear wheel supports, and a braking mechanism is provided on the rear wheel; Its features are, The folding joint is formed by rotating two sets of joint seats. The two sets of joint seats are respectively installed on the vertical support and the front and rear wheel supports. An elastic locking component is set between the two sets of joint seats to lock the joint seats. When the joint seats are rotated under force, the elastic locking component releases the lock between the joint seats.

2. The walking aid that is easy to fold and unfold according to claim 1, characterized in that, One of the joint seats has a through hole for embedding the elastic locking component, and the other joint seat has two limiting grooves. When the elastic locking component is opposite to the limiting groove, the elastic locking component extends into the limiting groove. The elastic locking component includes a locking pin and a spring. The spring and the locking pin are embedded in the through hole. One end of the spring abuts against the bottom of the through hole, and the other end of the spring abuts against the locking pin.

3. A walking aid that is easy to fold and unfold according to claim 2, characterized in that, The locking pin is a cylinder that fits into the inside of the through hole. The top of the locking pin is a hemisphere, and the diameter of the limiting groove is smaller than the diameter of the top hemisphere of the locking pin.

4. A walking aid that is easy to fold and unfold according to claim 2, characterized in that, The locking pin is a sphere and fits against the inner wall of the through hole. The diameter of the limiting groove is smaller than the diameter of the locking pin.

5. A walking aid that is easy to fold and unfold according to claim 2, characterized in that, The braking mechanism includes a brake seat, a fixing block, and a locking bolt. The fixing block is installed on the front and rear wheel brackets near the rear wheel end. The fixing block has a sliding groove for the brake seat to be inserted into. The brake seat slides back and forth in the sliding groove. The locking bolt passes through the fixing block and extends into the sliding groove of the fixing block. The locking bolt and the fixing block are rotatably engaged. The brake seat has a threaded hole, and the locking bolt extends into the bolt hole of the brake seat. The length of the brake seat extending out of the sliding groove is adjusted by rotating the locking bolt.

6. A walking aid that is easy to fold and unfold according to claim 1, characterized in that, The braking mechanism includes a brake lever, a brake cable, and brake blocks. The brake lever is installed at the handle and connected to the brake cable. Brake blocks are installed on the front and rear wheel brackets near the rear wheel and connected to the brake cable. Brake cable mounting brackets are installed on the front and rear wheel brackets. The steel cable of the brake cable passes through the brake cable mounting brackets and is connected to the brake blocks. A compression spring is sleeved on the steel cable between the brake cable mounting brackets and the brake blocks.

7. A walking aid that is easy to fold and unfold according to claim 6, characterized in that, The locking assembly includes a first locking block and a limiting block. A limiting block is provided on the inner side of the bottom of the front and rear wheel brackets. The limiting block is located below the folding large joint. A first locking block is provided at the bottom of the X-shaped folding rod. When the X-shaped folding rod is unfolded, the first locking block abuts against the limiting block. A limiting assembly is provided on the front and rear wheel brackets to limit the forward swing of the vertical bracket.

8. A walking aid that is easy to fold and unfold according to claim 7, characterized in that, The rear wheel is mounted in the middle of the rear of the front and rear wheel brackets.

9. A walking aid that is easy to fold and unfold according to claim 5 or 8, characterized in that, Support rods are fixed at the top of both ends of the X-shaped folding rod. Support blocks that hold the support rods are fixed inside the vertical bracket. A connecting rod is hinged between the support rod and the X-shaped folding rod. A rotatable hook is installed on one of the connecting rods. A straight rod is fixed on the X-shaped folding rod. The hook is hung on the straight rod by rotation. An arc-shaped groove is opened on the connecting rod. A slider that extends into the arc-shaped groove is fixed on the hook.

10. A walking aid that is easy to fold and unfold according to claim 9, characterized in that, Each support rod has a notch for inserting a round rod.

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