Novel folding four-wheel rollator

Abstract

The utility model discloses a novel folding four-wheel rollator, which relates to the rollator technical field, the four-wheel rollator comprises a frame assembly, a cross pipe assembly, pedals, a first screw, an M8 screw, a hollow sleeve and a plastic front fork, the frame left assembly and the frame right assembly are respectively fixed on the cross pipe left assembly and the cross pipe right assembly through the M8 screw; a hollow sleeve is arranged at the upper end of the frame left assembly and the upper end of the frame right assembly, a brake assembly is arranged at the rear end of the frame left assembly and the rear end of the frame right assembly, a height adjusting assembly is arranged on the hollow sleeve, and a folding mechanism is arranged between the frame assembly and the cross pipe assembly. The left switch piece and the right switch piece are driven by the seat cushion hand pulling belt to achieve locking or limiting releasing of the connecting rod assembly, the folding and carrying effects of the frame are achieved, the braking device and the braking assembly are arranged, a braking grip is used for driving a braking cable to control the friction distance between a plastic brake pad and an 8-inch EVA wheel, and therefore the braking purpose is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of walkers, in particular to a novel foldable four-wheel walker. Background Art

[0002] A folding four-wheeled walker is a portable, flexible assistive tool that can help the elderly or people with limited mobility to carry out daily activities. It usually consists of four wheels, a seat and a folding mechanism, allowing the user to fold it up for storage or carrying when needed. This type of vehicle usually has an electric drive system, and the user can control the movement of the vehicle using a handle or button. It is particularly useful in urban environments because it can pass through narrow sidewalks, shops and other places, and can also be easily folded into a smaller size to fit into public transportation or the storage space of a vehicle. A folding four-wheeled walker can give people with limited mobility more independence and freedom, making it easier for them to participate in social activities and daily life. For example, the patent A new type of foldable four-wheeled walker recorded in the patent with notification number CN219207948U is provided with two frame bodies with the same structure and symmetrically arranged, a spring shock-absorbing assembly, a support base and a rear wheel tube assembly connected to the support base, such as: a rear wheel, a front fork, a fixed base, a front fork and a front wheel, etc., so that users with limited mobility can move forward smoothly with the help of the walker. At the same time, the spring shock-absorbing assembly enables the frame as a whole to have a certain deformation ability, which effectively reduces the bumpy feeling when the walker is moving and reduces the impact of the reverse force on the user's lumbar spine. However, if the walker encounters an obstacle in front during the moving process, it does not have the function of crossing the obstacle. Therefore, during use, it is necessary to adjust the route and turn the body several times.

[0003] Based on this, a novel foldable four-wheeled walker is now provided, which can eliminate the disadvantages of the existing devices. Utility Model Content

[0004] The utility model aims to provide a novel foldable four-wheeled walker to solve the problems in the background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A novel foldable four-wheeled walker comprises a left frame component, a right frame component, a left cross-tube component, a right cross-tube component, a pedal, a first screw, an M8 screw, a hollow sleeve and a plastic front fork. The left frame component and the right frame component are respectively fixed to the left cross-tube component and the right cross-tube component by the M8 screw. The tail ends of the left frame component and the right frame component are rotatably provided with pedals for crossing obstacles. The upper ends of the left frame component and the right frame component are provided with a hollow sleeve. The front ends of the left frame component and the right cross-tube component are connected and fixed to the plastic front fork. The left cross-tube component and the right cross-tube component are assembled into an X shape by the first screw. The left cross-tube component and the right cross-tube component are connected to the left frame component and the right frame component by springs and screws. The rear ends of the left frame component and the right frame component are provided with brake components. The hollow sleeve is provided with a height adjustment component. A folding mechanism is provided between the left frame component, the right frame component, the left cross-tube component and the right cross-tube component.

[0007] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0008] In an optional scheme: the folding mechanism includes a seat cushion hand strap, a left switch piece, a first connecting rod assembly, a right switch piece, a second connecting rod assembly, a seat cushion, a second screw and a third screw. The seat cushion hand strap passes through the panel of the seat cushion, and both ends are fixedly connected to the upper left and right switch pieces. The left and right switch pieces are respectively rotatably set on the left and right cross-tube assemblies. The upper left and right switch pieces are both provided with semicircular hook surfaces for locking the cylindrical rods on the first connecting rod assembly and the second connecting rod assembly. The first connecting rod assembly and the second connecting rod assembly are respectively rotatably connected to the hollow sleeve and the left and right cross-tube assemblies through the second screw and the third screw. The two side ends of the seat cushion are fixedly set on the upper ends of the above-mentioned left and right cross-tube assemblies, and the seat cushion is connected with a seat cushion hand strap.

[0009] In an optional solution: the plastic front fork can achieve 360-degree rotation.

[0010] In an optional solution: the height adjustment assembly includes an adjustment knob, a marble and a handrail tube, the adjustment knob is threaded into a threaded hole at the lower end of the outer wall of the hollow sleeve, the marble is clamped into a through hole at the upper end of the inner wall of the hollow sleeve, the handrail tube is inserted into the hollow sleeve, and a braking device is provided on the handrail tube.

[0011] In an optional scheme: the brake assembly includes an 8-inch EVA wheel, a plastic brake pad, a plastic adjusting screw and a brake line. The four 8-inch EVA wheels are rotatably arranged at the front and rear ends of the left frame assembly and the right frame assembly respectively. The plastic brake pad and the plastic adjusting screw are fixedly arranged on the frame body of the 8-inch EVA wheel near the rear end of the left frame assembly and the right frame assembly. One end of the brake line is connected to the plastic brake pad through the plastic adjusting screw, and the other end of the brake line passes through the handrail tube and is connected to the braking device arranged on the handrail tube.

[0012] In an optional scheme: the braking device includes a hand handle, a brake seat and a brake grip, a hand handle is horizontally provided at the top of the handrail tube, a brake seat is detachably provided at the turning point where the hand handle is connected to the handrail tube, the brake grip is fixed on the curved surface shell connecting the brake seat and the handrail tube, and a brake line is connected to the movable handle of the brake grip.

[0013] In an optional solution: a backrest fixing seat is fixedly provided on the T-slots of the two brake seats, and a backrest is detachably connected to the two backrest fixing seats.

[0014] In an optional solution: a supporting screw for hanging a shopping bag is threaded onto the hollow sleeve.

[0015] In an optional solution, the brake seat of the handrail tube is designed with a curved surface to assist the sitting and standing function.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The utility model uses a folding mechanism and a seat cushion hand strap to drive the left and right switch pieces to lock or limit the connecting rod assembly, thereby achieving the effect of folding the frame left and right for easy carrying and placement.

[0018] 2. The utility model uses a brake device and a brake assembly to change the gap distance between the brake seat and the hand grip by using a brake handle, thereby changing the friction distance between the plastic brake pad and the 8-inch EVA wheel, thereby achieving the purpose of braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of one side of the utility model.

[0020] Figure 2 It is the right view of the utility model.

[0021] Figure 3 It is a structural schematic diagram of the other side of the utility model.

[0022] Figure 4 It is a top view of the utility model.

[0023] Figure 5 It is a partial enlarged structural schematic diagram of the utility model A.

[0024] Figure 6 It is a partial enlarged structural schematic diagram of the utility model B.

[0025] Notes on the figure markings: 01, left frame assembly; 02, right frame assembly; 03, left cross tube assembly; 04, right cross tube assembly; 05, footrest; 06, seat hand strap; 07, left switch piece; 08, connecting rod assembly; 09, right switch piece; 10, connecting rod assembly; 11, first screw; 12, M8 screw; 13, hand grip; 14, brake seat; 15, backrest fixing seat; 16, backrest; 17, brake grip; 18, adjustment knob; 19, hollow sleeve; 20, support screw; 21, 8-inch EVA wheel; 22, plastic brake pad; 23, plastic adjustment screw; 24, plastic front fork; 25, shopping bag; 26, seat; 27, brake line; 28, marbles; 29, handrail tube; 30, second screw; 31, third screw. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] In one embodiment, Figure 1-Figure 6 As shown, a novel foldable four-wheeled walker comprises a left frame component 01, a right frame component 02, a left cross tube component 03, a right cross tube component 04, a pedal 05, a first screw rod 11, an M8 screw rod 12, a hollow sleeve 19 and a plastic front fork 24. The left frame component 01 and the right frame component 02 are respectively fixed to the left cross tube component 03 and the right cross tube component 04 by the M8 screw rod 12. The rear ends of the left frame component 01 and the right frame component 02 are rotatably provided with a pedal 05 for crossing obstacles. The upper ends of the left frame component 01 and the right frame component 02 are provided with a hollow sleeve 19. The front ends of the left frame component 01 and the right frame component 02 are connected to the plastic front fork 24. The fork 24 is connected and fixed, the left cross tube component 03 and the right cross tube component 04 are assembled into an X shape through the first screw 11, the left cross tube component 03 and the right cross tube component 04 are connected to the left frame component 01 and the right frame component 02 through springs and screws, and the rear ends of the left frame component 01 and the right frame component 02 are provided with brake components, which play the role of braking and assisting the walking wheel group, and the hollow sleeve 19 is provided with a height adjustment component for adjusting the height of the backrest, and a folding mechanism is provided between the left frame component 01, the right frame component 02, the left cross tube component 03 and the right cross tube component 04, so as to realize the left and right folding of the frame for easy carrying and placement.

[0028] like Figure 2 and Figure 6 As shown, the folding mechanism includes a seat hand strap 06, a left switch piece 07, a first connecting rod assembly 08, a right switch piece 09, a second connecting rod assembly 10, a seat 26, a second screw 30 and a third screw 31. The seat hand strap 06 passes through the panel of the seat 26, and both ends are fixedly connected to the left switch piece 07 and the right switch piece 09. The left switch piece 07 and the right switch piece 09 are respectively rotatably arranged on the left cross tube assembly 03 and the right cross tube assembly 04. The left switch piece 07 and the right switch piece 09 are both provided with a semicircular hook surface for locking the cylindrical rods on the first connecting rod assembly 08 and the second connecting rod assembly 10. The semicircular hook surface is disengaged by pulling the seat hand strap 06, the left switch piece 07 and the right switch piece 09. The cylindrical rods on the first link assembly 08 and the second link assembly 10 realize the unfolding and folding of the frame. The first link assembly 08 and the second link assembly 10 are rotatably connected to the hollow sleeve 19 and the left cross tube assembly 03 and the right cross tube assembly 04 through the second screw 30 and the third screw 31 respectively. The two side ends of the seat cushion 26 are fixedly arranged on the upper ends of the above-mentioned left cross tube assembly 03 and the right cross tube assembly 04. The seat cushion 26 is connected with a seat cushion hand strap 06. By squeezing the seat cushion 26 on both sides downward, the semicircular hook surfaces on the left switch piece 07 and the right switch piece 09 are hooked to the cylindrical rods on the first link assembly 08 and the second link assembly 10 using the seat cushion hand strap 06 to complete the opening of the seat cushion 26.

[0029] like Figure 1 As shown, the plastic front fork 24 can achieve 360-degree rotation.

[0030] like Figure 5 As shown, the height adjustment assembly includes an adjustment knob 18, a marble 28 and a handrail tube 29. The adjustment knob 18 is screwed into the threaded hole at the lower end of the outer wall of the hollow sleeve 19, the marble 28 is clamped into the through hole at the upper end of the inner wall of the hollow sleeve 19, the handrail tube 29 is inserted into the hollow sleeve 19, and a braking device is provided on the handrail tube 29.

[0031] like Figure 3As shown, the brake assembly includes an 8-inch EVA wheel 21, a plastic brake pad 22, a plastic adjusting screw 23 and a brake line 27. The four 8-inch EVA wheels 21 are rotatably arranged at the front and rear ends of the left frame component 01 and the right frame component 02 respectively. The plastic brake pad 22 and the plastic adjusting screw 23 are fixedly arranged on the frame body of the 8-inch EVA wheel 21 near the rear end of the left frame component 01 and the right frame component 02. The friction distance between the plastic brake pad 22 and the plastic adjusting screw 23 and the 8-inch EVA wheel 21 is adjusted to achieve the braking operation of the 8-inch EVA wheel 21. One end of the brake line 27 is connected to the plastic brake pad 22 through the plastic adjusting screw 23, and the other end of the brake line 27 passes through the handrail tube 29 and is connected to the brake device arranged on the handrail tube 29. The distance between the plastic brake pad 22 and the 8-inch EVA wheel 21 is adjusted by rotating the plastic brake adjusting knob through the brake line 27.

[0032] like Figure 3 As shown, the braking device includes a hand grip 13, a brake seat 14 and a brake grip 17. The hand grip 13 is horizontally disposed at the top end of the handrail tube 29 to facilitate the placement of the hand. The brake seat 14 is detachably disposed at the turning point where the hand grip 13 and the handrail tube 29 are connected. The brake grip 17 is fixedly disposed on the curved surface shell connecting the brake seat 14 and the handrail tube 29. By holding the brake grip 17, the distance between the brake grip 17 and the hand grip 13 is changed, thereby driving the brake line 27 to control the brake assembly. The brake line 27 is connected to the movable handle of the brake grip 17.

[0033] like Figure 3 As shown, a backrest fixing seat 15 is fixedly provided on the T-slot of the two brake seats 14 , and a backrest 16 is detachably connected to the two backrest fixing seats 15 , so as to facilitate the replacement, adjustment and loading and unloading of the backrest 16 .

[0034] like Figure 3 As shown, a supporting screw 20 for hanging a shopping bag 25 is screwed onto the hollow sleeve 19 .

[0035] like Figure 3 As shown, the brake seat 14 of the handrail tube 29 is designed with a curved surface to assist the sitting and standing function.

[0036] Working principle: The above embodiment discloses a novel foldable four-wheeled walker, wherein, during use, by pulling the seat cushion hand strap 06, the left switch piece 07 and the right switch piece 09 are pulled, so that the semicircular hook surfaces of the switch piece 07 and the right switch piece 09 are separated from the cylindrical rods on the first connecting rod assembly 08 and the second connecting rod assembly 10, so that the first rod assembly 08 and the second connecting rod assembly 10 are rotated, thereby realizing the unfolding and folding of the left frame assembly 01 and the right frame assembly 02. When it is necessary to open the seat cushion 26, the seat cushion 26 is squeezed downward and to both sides. When the semicircular hook surfaces of the left switch piece 07 and the right switch piece 09 hook the first connecting rod assembly 08 and The cylindrical rod rear cushion 26 on the second connecting rod assembly 10 is unfolded, and then the marble 28 is used to control the positioning and adjustment knob 18 to achieve the height adjustment of the handrail tube 29 inserted in the hollow sleeve 19, thereby completing the height adjustment of the backrest 16. When encountering an obstacle on the road, the plastic front fork 24 equipped with an 8-inch EVA wheel 21 is raised by stepping on the pedal 05, thereby pushing the walker over the obstacle. When braking is required, the distance between the brake handle 17 and the hand handle 13 is changed, and the plastic brake adjustment knob is rotated through the brake line 27 to control the friction distance between the plastic brake pad 22 and the 8-inch EVA wheel 21 to achieve safe braking.

[0037] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A novel foldable four-wheeled walker, comprising a left frame component (01), a right frame component (02), a left cross tube component (03), a right cross tube component (04), a pedal (05), a first screw rod (11), an M8 screw rod (12), a hollow sleeve (19) and a plastic front fork (24), wherein the left frame component (01) and the right frame component (02) are respectively fixed to the left cross tube component (03) and the right cross tube component (04) by the M8 screw rod (12), and the rear ends of the left frame component (01) and the right frame component (02) are provided with a rotation mechanism. A pedal (05) for crossing obstacles, a hollow sleeve (19) is provided at the upper end of the left frame component (01) and the right frame component (02), the front ends of the left frame component (01) and the right frame component (02) are connected and fixed to a plastic front fork (24), the left cross tube component (03) and the right cross tube component (04) are assembled into an X shape through a first screw rod (11), and the left cross tube component (03) and the right cross tube component (04) are connected to the left frame component (01) and the right frame component (02) through springs and screws, characterized in that: The rear ends of the left frame component (01) and the right frame component (02) are provided with brake components, the hollow sleeve (19) is provided with a height adjustment component, and a folding mechanism is provided between the left frame component (01), the right frame component (02), the left cross tube component (03) and the right cross tube component (04); The folding mechanism comprises a seat cushion hand strap (06), a left switch piece (07), a first connecting rod assembly (08), a right switch piece (09), a second connecting rod assembly (10), a seat cushion (26), a second screw rod (30) and a third screw rod (31). The seat cushion hand strap (06) passes through a panel of the seat cushion (26), and both ends are fixedly connected to the left switch piece (07) and the right switch piece (09). The left switch piece (07) and the right switch piece (09) are rotatably arranged on the left cross tube assembly (03) and the right cross tube assembly (04), respectively. The right side of the closing piece (09) is provided with a semicircular hook surface for locking the cylindrical rods on the first connecting rod assembly (08) and the second connecting rod assembly (10); the first connecting rod assembly (08) and the second connecting rod assembly (10) are respectively rotatably connected to the hollow sleeve (19) and the left cross tube assembly (03) and the right cross tube assembly (04) through the second screw rod (30) and the third screw rod (31); the two side ends of the seat cushion (26) are fixedly arranged on the upper ends of the above-mentioned left cross tube assembly (03) and the right cross tube assembly (04); and the seat cushion (26) is connected with a seat cushion hand strap (06).

2. A novel foldable four-wheeled walker according to claim 1, characterized in that: The plastic front fork (24) can achieve 360-degree rotation.

3. A novel foldable four-wheeled walker according to claim 1, characterized in that: The height adjustment component comprises an adjustment knob (18), a marble (28) and a handrail tube (29); the adjustment knob (18) is screwed into a threaded hole at the lower end of the outer wall of the hollow sleeve (19); the marble (28) is clamped into a through hole at the upper end of the inner wall of the hollow sleeve (19); the handrail tube (29) is inserted into the hollow sleeve (19); and a braking device is provided on the handrail tube (29).

4. The novel foldable four-wheeled walker according to claim 1, characterized in that: The brake assembly comprises an 8-inch EVA wheel (21), a plastic brake pad (22), a plastic adjusting screw (23) and a brake line (27); the four 8-inch EVA wheels (21) are rotatably arranged at the front and rear ends of the left frame assembly (01) and the right frame assembly (02), respectively; the plastic brake pad (22) and the plastic adjusting screw (23) are fixedly arranged on the frame body of the 8-inch EVA wheel (21) near the rear ends of the left frame assembly (01) and the right frame assembly (02); one end of the brake line (27) is connected to the plastic brake pad (22) through the plastic adjusting screw (23); the other end of the brake line (27) passes through a handrail tube (29) and is connected to a brake device arranged on the handrail tube (29).

5. A novel foldable four-wheeled walker according to claim 4, characterized in that: The braking device comprises a hand grip (13), a brake seat (14) and a brake grip (17); the top end of the handrail tube (29) is horizontally provided with the hand grip (13); the turning point where the hand grip (13) and the handrail tube (29) are connected is detachably provided with the brake seat (14); the brake grip (17) is fixedly arranged on the curved surface shell where the brake seat (14) and the handrail tube (29) are connected; and the movable handle of the brake grip (17) is connected with a brake line (27).

6. A novel foldable four-wheeled walker according to claim 5, characterized in that: A backrest fixing seat (15) is fixedly provided on the T-slots of the two brake seats (14), and a backrest (16) is detachably connected to the two backrest fixing seats (15).

7. The novel foldable four-wheeled walker according to claim 1, characterized in that: The hollow sleeve (19) is threaded with a supporting screw (20) for hanging a shopping bag (25).

8. The novel foldable four-wheeled walker according to claim 5, characterized in that: The brake seat (14) of the handrail tube (29) is designed with a curved surface for assisting the sitting and standing function.

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