Simple four-wheel cart

Abstract

The utility model discloses a simple type four-wheel cart, including first bracing frame, second bracing frame and cushion, the number of first bracing frame and second bracing frame is both two, the lower end of first bracing frame is equipped with the first telescopic landing leg in sliding mode, the peripheral side of first telescopic landing leg is fixedly equipped with the fixed clamping seat, both sides of fixed clamping seat are equipped with the clamping column, and the clamping column is equipped with the first telescopic landing leg and the second telescopic landing leg. A clamping block is arranged on the fixed clamping seat, a clamping groove is formed in the lower side of the clamping block, and the clamping groove is installed on the peripheral side of the clamping column in a clamping mode. According to the foldable four-wheel cart, through the fixed clamping seats, the clamping blocks and the clamping columns, when the four-wheel cart needs to be folded, transported and stored, the clamping blocks are pulled upwards, so that the clamping blocks are separated from the clamping columns, and then the pedal supporting legs and the pedals can be detached; therefore, the occupied space of the whole four-wheel cart after folding can be reduced, and a user can transport and store the four-wheel cart conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of four-wheel carts, in particular to a simple four-wheel cart. Background Art

[0002] A rollator is an assistive device designed for people who need help walking, typically the elderly or those with mobility impairments. Its primary function is to provide support and stability, helping the user maintain balance while walking. It typically has four wheels, some of which can be locked to prevent sliding. The rollator is typically made of lightweight materials for easy movement. With the continuous advancement of technology, there are more and more types of rollators with more and more functions.

[0003] Some existing rollators are equipped with pedal mechanisms. When an elderly person sits on the rollator, they can place their feet on the pedal mechanisms, making it easier for others to push the elderly person to move. However, most existing pedal mechanisms are difficult to remove, resulting in the overall structure of the rollator being relatively large even when folded, occupying a large amount of space and being inconvenient for transportation and storage. Therefore, there is an urgent need to design a simple four-wheeled stroller to solve the above problem. Utility Model Content

[0004] The purpose of the utility model is to provide a simple four-wheeled cart to solve the above-mentioned deficiencies in the prior art.

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

[0006] A simple four-wheeled cart comprises a first support frame, a second support frame and a seat cushion, wherein the number of the first support frame and the second support frame are both two, a first telescopic leg is slidably mounted on the lower end of the first support frame, a fixed bracket is fixedly mounted on the periphery of the first telescopic leg, clamping columns are provided on both sides of the fixed bracket, a clamping block is provided on the fixed bracket, a clamping groove is provided on the lower side of the clamping block, the clamping groove is clamped and mounted on the periphery of the clamping column, a pedal leg is fixedly mounted on one side of the clamping block, and a pedal is rotatably mounted on one side of the lower end of the pedal leg.

[0007] A connecting frame is provided between the two first support frames and the two second support frames, a push handle is provided on the upper side of the second support frame, a handbrake assembly is provided on one side of the push handle, and the seat cushion is provided between the first support frame and the two second support frames.

[0008] A backrest is provided between the two connecting frames. A fixing rod is provided on one side of each end of the backrest. A slot is provided on one side of the connecting frame. The fixing rod is movably inserted into the slot.

[0009] A fixed shell is fixedly installed on one side of the connecting frame, and a rotating ring is rotatably installed on the peripheral side of the fixed shell. Four trapezoidal blocks are arranged between the rotating ring and the peripheral side of the fixed shell. Four sliding grooves are opened on the peripheral side of the fixed shell, and sliding columns are slidably installed in the four sliding grooves. An arc-shaped plug-in block is provided at one end of the sliding column, and four arc-shaped slots are opened on the peripheral side of one end of the fixed rod. The four arc-shaped plug-in blocks are movably inserted in the four arc-shaped slots respectively.

[0010] The fixed shell corresponds to the notch, one end of the fixed rod is located between the fixed shells, and limiting slots are provided on both sides of the inner wall of the slot, and a limiting slider is slidably installed in the limiting slot. The limiting slider is fixedly connected to the sliding column, and a spring is provided between the limiting slider and the limiting slot.

[0011] A second telescopic leg is slidably mounted on the inner wall of the lower end of the second support frame, a movable wheel is provided on the lower side of the second telescopic leg, a universal wheel is provided on the lower side of the first telescopic leg, a first fixing knob is threadedly mounted on one side of the second support frame, and a second fixing knob is threadedly mounted on one side of the first support frame.

[0012] In the above technical solution, the utility model provides a simple four-wheeled cart with the following beneficial effects:

[0013] (1) By providing a fixed clamping seat, a clamping block and a clamping column, when the four-wheeled stroller needs to be folded for transportation and storage, the clamping block can be pulled upwards to disengage the clamping block from the clamping column, and then the pedal legs and the pedals can be removed, thereby reducing the space occupied by the entire four-wheeled stroller after folding, making it easier for users to transport and store the four-wheeled stroller.

[0014] (2) By providing a fixed shell and a fixed rod, the user can easily disassemble the backrest when the four-wheeled stroller needs to be folded, transported, or stored. The backrest is made of soft cloth, thereby further reducing the space occupied by the entire four-wheeled stroller after folding.

[0015] (3) By providing the first telescopic leg and the second telescopic leg, the height of the four-wheeled cart can be adjusted according to the different usage requirements of the users, so that the four-wheeled cart can be suitable for different groups of people, thereby improving the applicability of the four-wheeled cart. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 The present invention provides a front view of the overall structure of a simple four-wheeled cart embodiment.

[0018] Figure 2 The present invention provides a schematic diagram of the overall structure of a simple four-wheeled cart from a rear view.

[0019] Figure 3 A simple four-wheeled cart embodiment of the present invention provides Figure 2 The enlarged structural diagram at point a is shown in the figure.

[0020] Figure 4 The present invention is a schematic diagram of the cross-sectional structure of a fixed shell and a fixed rod provided in an embodiment of a simple four-wheeled cart.

[0021] 1. First support frame; 2. Second support frame; 3. Connecting frame; 4. Push handle; 5. Backrest; 6. Handbrake assembly; 7. Second telescopic leg; 8. First fixed knob; 9. Moving wheel; 10. First telescopic leg; 11. Second fixed knob; 12. Seat; 13. Universal wheel; 14. Footrest leg; 15. Footrest; 16. Fixed base; 17. Snap block; 18. Snap slot; 19. Fixed shell; 20. Rotating ring; 21. Trapezoidal block; 22. Slide slot; 23. Sliding column; 24. Spring; 25. Limiting slider; 26. Arc-shaped insert block; 27. Fixed rod; 28. Arc-shaped slot; 29. ​​Snap column. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-4 As shown, a simple four-wheeled cart provided by an embodiment of the present invention includes a first support frame 1, a second support frame 2 and a seat cushion 12. The number of the first support frame 1 and the second support frame 2 are both two. The lower end of the first support frame 1 is slidably installed with a first telescopic support leg 10, and a fixed base 16 is fixedly installed on the periphery of the first telescopic support leg 10. Clamping columns 29 are provided on both sides of the fixed base 16. A clamping block 17 is provided on the fixed base 16, and a clamping groove 18 is opened on the lower side of the clamping block 17. The clamping groove 18 is clamped and installed on the periphery of the clamping column 29. A pedal support leg 14 is fixedly installed on one side of the clamping block 17, and a pedal 15 is rotatably installed on one side of the lower end of the pedal support leg 14.

[0024] Specifically, in this embodiment, when it is necessary to disassemble the pedal leg 14 and the pedal 15, the pedal leg 14 and the clamping block 17 are pulled upward, so that the clamping groove 18 on the clamping block 17 is separated from the clamping column 29, wherein the inner wall of the clamping groove 18 is provided with elastic plastic, and the shape of the clamping groove 18 is teardrop-shaped. When the clamping block 17 moves upward, the elastic plastic sheet in the clamping groove 18 is deformed by the extrusion force, and then the block 17 can be separated from the clamping column 29, completing the disassembly of the pedal leg 14 and the pedal 15, thereby reducing the overall weight of the four-wheeled stroller after folding. The space occupied is convenient for users to transport and store the four-wheel cart. When the pedal leg 14 and the pedal 15 need to be installed, the clamping groove 18 on the clamping block 17 is aligned with the clamping column 29, and then the clamping block 17 is pressed downward, so that the elastic plastic in the clamping groove 18 will be deformed by the extrusion force, and then the clamping column 29 is clamped in the clamping groove 18, and the clamping column 29 is limited by the elastic plastic sheet, so that the pedal leg 14 and the pedal 15 can be installed, thereby making it convenient for users to install and fix the pedal leg 14 and the pedal 15.

[0025] The utility model provides a simple four-wheeled cart, wherein a connecting frame 3 is provided between the two first support frames 1 and the two second support frames 2, a push handle 4 is provided on the upper side of the second support frame 2, a handbrake assembly 6 is provided on one side of the push handle 4, a seat cushion 12 is provided between the first support frame 1 and the two second support frames 2, a backrest 5 is provided between the two connecting frames 3, a fixing rod 27 is provided on one side of both ends of the backrest 5, a notch is provided on one side of the connecting frame 3, the fixing rod 27 is movably inserted in the notch, a fixing shell 19 is fixedly installed on one side of the connecting frame 3, the fixing shell 19 is annular, and the cross section of the fixing shell 19 is I-shaped, a rotating ring 20 is rotatably installed on the circumference of the fixing shell 19, and the rotating ring 2 Four trapezoidal blocks 21 are provided between 0 and the periphery of the fixed shell 19, four slide grooves 22 are provided on the periphery of the fixed shell 19, and sliding columns 23 are slidably installed in the four slide grooves 22. An arc-shaped plug-in block 26 is provided at one end of the sliding column 23, and four arc-shaped slots 28 are provided on the periphery of one end of the fixed rod 27. The four arc-shaped plug-in blocks 26 are movably inserted in the four arc-shaped slots 28 respectively. The fixed shell 19 corresponds to the notch, and one end of the fixed rod 27 is located between the fixed shell 19. Limit slide grooves are provided on both sides of the inner wall of the slide groove 22, and a limit slider 25 is slidably installed in the limit slide groove. The limit slider 25 is fixedly connected to the sliding column 23, and a spring 24 is provided between the limit slider 25 and the limit slide groove.

[0026] In another embodiment provided by the present invention, when disassembling the backrest 5, by rotating the rotating ring 20, the rotating ring 20 drives the trapezoidal block 21 to move, and the movement of the trapezoidal block 21 can release the extrusion of the sliding column 23, so that the sliding column 23 can drive the arc-shaped plug 26 to retract and move through the elastic force of the spring 24. The movement of the arc-shaped plug 26 will disengage from the arc-shaped slot 28 on the side of the fixing rod 27, thereby releasing the fixation of the fixing rod 27. Then, pull the fixing rod 27 so that the fixing rod 27 is separated from the fixing shell 19 and the notch, and the disassembly of the backrest 5 can be completed. When installing, insert the fixing rod 27 into the fixing shell 19, and then rotate the rotating The ring 20 drives the trapezoidal block 21 to move. When the trapezoidal block 21 contacts one end of the sliding column 23, it squeezes the sliding column 23, and then the sliding column 23 drives the arc-shaped plug-in block 26 to move through the inclined surface of the trapezoidal block 21 and the curved surface of the sliding column 23. After the arc-shaped plug-in block 26 moves and is inserted into the arc-shaped slot 28 on the side of the fixed rod 27, the rotation of the rotating ring 20 is stopped. Among them, an elastic card bead is provided on one side of the rotating ring 20, and a limiting groove is provided on one side of the inner wall of the fixed shell 19. At this time, the elastic card bead will be inserted into the limiting groove provided in the fixed shell 19, limiting the rotating ring 20, and the installation of the backrest 5 can be completed.

[0027] The utility model provides a simple four-wheel cart, wherein a second telescopic leg 7 is slidably mounted on the inner wall of the lower end of the second support frame 2, a movable wheel 9 is provided on the lower side of the second telescopic leg 7, a universal wheel 13 is provided on the lower side of the first telescopic leg 10, a first fixing knob 8 is threadedly mounted on one side of the second support frame 2, and a second fixing knob 11 is threadedly mounted on one side of the first support frame 1.

[0028] In another embodiment provided by the present invention, the second telescopic leg 7 can be telescopically adjusted by rotating the first fixing knob 8 to release the squeezing of the second telescopic leg 7, and the first telescopic leg 10 can be telescopically adjusted by rotating the second fixing knob 11 to release the squeezing of the first telescopic leg 10. After the adjustment is completed, the second telescopic leg 7 and the first telescopic leg 10 can be fixed by rotating the first fixing knob 8 and the second fixing knob 11 to squeeze the second telescopic leg 7 and the first telescopic leg 10.

[0029] In other embodiments, by opening a plurality of sockets on one side of the second telescopic leg 7 and the first telescopic leg 10, one end of the first fixing knob 8 and the second fixing knob 11 can be inserted into the corresponding sockets, thereby improving the stability of fixing the second telescopic leg 7 and the first telescopic leg 10.

[0030] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A simple four-wheeled cart comprising a first support frame (1), a second support frame (2) and a seat cushion (12), characterized in that: The number of the first support frame (1) and the number of the second support frame (2) are both two. A first telescopic support leg (10) is slidably mounted on the lower end of the first support frame (1). A fixed clamping seat (16) is fixedly mounted on the circumference of the first telescopic support leg (10). Both sides of the fixed clamping seat (16) are provided with a clamping column (29). A clamping block (17) is provided on the fixed clamping seat (16). A clamping groove (18) is provided on the lower side of the clamping block (17). The clamping groove (18) is clamped and mounted on the circumference of the clamping column (29). A pedal support leg (14) is fixedly mounted on one side of the clamping block (17). A pedal (15) is rotatably mounted on one side of the lower end of the pedal support leg (14).

2. A simple four-wheeled cart according to claim 1, characterized in that: A connecting frame (3) is provided between each of the two first support frames (1) and the two second support frames (2); a push handle (4) is provided on the upper side of the second support frame (2); a handbrake assembly (6) is provided on one side of the push handle (4); and the seat cushion (12) is provided between each of the first support frames (1) and the two second support frames (2).

3. A simple four-wheeled cart according to claim 2, characterized in that: A backrest (5) is provided between the two connecting frames (3), and a fixing rod (27) is provided on one side of both ends of the backrest (5). A notch is provided on one side of the connecting frame (3), and the fixing rod (27) is movably inserted into the notch.

4. A simple four-wheeled cart according to claim 3, characterized in that: A fixed shell (19) is fixedly installed on one side of the connecting frame (3), a rotating ring (20) is rotatably installed on the peripheral side of the fixed shell (19), four trapezoidal blocks (21) are arranged between the rotating ring (20) and the peripheral side of the fixed shell (19), four sliding grooves (22) are opened on the peripheral side of the fixed shell (19), and sliding columns (23) are slidably installed in the four sliding grooves (22), and an arc-shaped plug-in block (26) is provided at one end of the sliding column (23), and four arc-shaped slots (28) are opened on the peripheral side of one end of the fixed rod (27), and the four arc-shaped plug-in blocks (26) are movably inserted in the four arc-shaped slots (28) respectively.

5. A simple four-wheeled cart according to claim 4, characterized in that: The fixed shell (19) corresponds to the notch, one end of the fixed rod (27) is located between the fixed shells (19), and both sides of the inner wall of the slide groove (22) are provided with a limit slide groove, and a limit slider (25) is slidably installed in the limit slide groove. The limit slider (25) is fixedly connected to the sliding column (23), and a spring (24) is provided between the limit slider (25) and the limit slide groove.

6. A simple four-wheeled cart according to claim 1, characterized in that: A second telescopic leg (7) is slidably mounted on the inner wall of the lower end of the second support frame (2); a movable wheel (9) is provided on the lower side of the second telescopic leg (7); a universal wheel (13) is provided on the lower side of the first telescopic leg (10); a first fixing knob (8) is threadedly mounted on one side of the second support frame (2); and a second fixing knob (11) is threadedly mounted on one side of the first support frame (1).

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