Portable trolley

Abstract

The utility model relates to the technical field of walking-aid carts for old people, and discloses a portable handcart, which comprises a front foot component, and front rollers are symmetrically arranged at the bottom of the portable handcart; the top of the rear foot assembly inclines upwards and is hinged to the top of the front foot assembly, and rear rollers are symmetrically arranged at the bottom end; the bottom of the backrest assembly is connected to the inner side of one end, close to the rear roller, of the rear leg assembly; the rear side of the seat surface is rotationally connected to the backrest assembly, and the front side is coaxially hinged to the tops of the front foot assembly and the rear foot assembly; the folding supporting mechanism is rotationally connected with the rear leg assembly and rotates forwards and backwards around the rear leg assembly to drive the front leg assembly, the backrest assembly and the seat surface to be unfolded and folded; the problems that in the prior art, a cart is not fixed after being folded and is prone to rotating and scattering during carrying, and carrying and storage are not facilitated are solved.

Description

Technical Field

[0001] This utility model relates to the field of elderly walking aids, specifically to a portable handcart. Background Technology

[0002] In daily life, strollers are often designed for infants and toddlers, such as CN106428181B, a children's stroller that makes it convenient to push an infant for a walk.

[0003] As society gradually ages, it becomes extremely inconvenient for those who need to go out or take the elderly with them. Due to their advanced age and frailty, they often need to walk, stop, or sit down to rest immediately, causing great difficulties and troubles for them when going out. To solve the problems of the elderly going out, our company has designed a multi-functional and portable trolley to facilitate the travel of the elderly or people with mobility difficulties, such as: CN221129749U, a portable toilet and shower chair. However, there are still some shortcomings in its use, such as: the small wheel structure is only suitable for relatively flat surfaces, and its stability and obstacle-crossing ability are insufficient for more rugged surfaces; because the two front legs rotate relative to the rear legs within the annular limiting holes before folding, they are not fixed after folding and are easy to rotate and spread out when moving, which is not conducive to carrying and storage. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a portable handcart with simple structure, convenient and quick assembly and disassembly, strong support, flexibility and practicality, easy to fold and not easy to fall apart, small space occupation, convenient to pick up and put away and easy to carry, which can better assist the elderly or people with mobility impairments in their travel.

[0005] To achieve the above objectives, this application adopts the following technical solution.

[0006] This utility model is a portable handcart, including

[0007] The front foot assembly has symmetrically placed front rollers at the bottom;

[0008] The rear foot assembly is hinged to the top of the front foot assembly with an upward tilt at the top, and has symmetrical rear rollers at the bottom.

[0009] The backrest assembly is connected to the inner side of the rear leg assembly near the rear casters via a folding support mechanism at the bottom.

[0010] The seat is rotatably connected to the backrest assembly on the rear side, and coaxially hinged to the top of the front and rear leg assemblies on the front side.

[0011] The folding support mechanism is rotatably connected to the rear leg assembly and rotates back and forth around the rear leg assembly to drive the front leg assembly, backrest assembly and seat to unfold and fold.

[0012] A further improvement is that the folding support mechanism includes: a support swing rod connecting the rear leg assembly and the backrest assembly, a limiting wrench set at one end of the support swing rod, a limiting pin adapted to the limiting wrench, and a connecting rod connecting the bottom of the supporting backrest assembly and the front leg assembly. The limiting pin is set on the rear leg assembly outside the swing end of the support swing rod. One end of the support swing rod is rotatably connected to the rear leg assembly, and the other end is rotatably connected to the backrest assembly and can be folded and unfolded relative to the rear leg assembly.

[0013] A further improvement is that the front foot assembly includes symmetrically parallel front foot tubes and a front foot connecting tube that connects the two front foot tubes laterally. The bottom end of the front foot tube is detachably connected to the front roller. The top of the front foot tube is bent and tilted backward to provide a connecting through hole and is hinged and fixed to the top of the rear foot assembly. The connecting rod is located on the inner side of the bottom of the front foot tube and above the front foot connecting tube.

[0014] A further improvement is that a connecting lug is provided in the middle of the front foot connecting tube, and a foot pedal assembly can be rotatably mounted on the connecting lug. The foot pedal frame and the foot plate set at the bottom of the foot pedal frame are composed of the foot pedal frame and a rotating shaft adapted to the connecting lug is provided above the foot pedal frame. The top of the foot pedal frame rotates to abut against the inside of the front foot connecting tube.

[0015] Further improvements are made in the following aspects: The rear foot assembly includes two symmetrically arranged rear horizontal fork tubes and a horizontal fork connecting tube connecting the two rear horizontal fork tubes. The rear bottom of the rear horizontal fork tube is fixedly connected to the rear roller, and the front top of the rear horizontal fork tube is hinged to the outer side of the top of the front foot tube. Symmetrically arranged on the two rear horizontal fork tubes are swing arm brackets adapted to the support swing arm. Swing arm brackets are provided on the rear horizontal fork tubes on both sides of the swing arm bracket. The swing arm brackets are provided with slots adapted to the support swing arm. The limiting wrench is coaxially arranged on the outer side of the connection end between the support swing arm and the backrest assembly and is adapted to the limiting pin on one side of the swing arm bracket. The limiting wrench includes a connecting part, a handle part, and a locking groove provided between the connecting part and the handle part, and a limiting protrusion extending outward along one side of the locking groove. The locking groove is adapted to the limiting pin.

[0016] A further improvement is that the rear foot assembly also includes a foot support push rod disposed at the bottom end of a rear horizontal fork tube. One end of the foot support push rod is disposed perpendicular to the rear horizontal fork tube, and the other end is bent upward and extends backward parallel to the rear roller beyond the maximum outer diameter of the rear roller.

[0017] Further improvements include: the backrest assembly comprises: a backrest tube connected to the inner side of the rear leg assembly, a push handle tube connecting the tops of the two backrest tubes, a backrest connecting tube connecting the bottoms of the two backrest tubes, and a backrest pad disposed between the two backrest tubes. The bottom of the backrest tube is rotatably supported and connected to the inner side of the rear horizontal fork tube via a support swing rod. The inner side of the bottom of the backrest tube is connected to the front leg tube via a connecting rod, forming a triangular stable support with the front leg tube and the rear horizontal fork tube. The connecting rod and the support swing rod are respectively disposed on the front and rear, inner and outer opposite sides of the backrest tube to form a stable support for the backrest tube. When folding, the limit wrench is pulled to disengage the limit pin buckle. The support swing rod rotates 180 degrees around the swing rod frame and then matches and buckles with the swing rod bracket on the other side, causing the support swing rod, the bottom end of the backrest assembly, the connecting rod, and the bottom of the front leg assembly connected to the connecting rod to fold towards the bottom of the rear horizontal fork tube. At the same time, the front leg assembly, the rear leg assembly, and the seat hinge joint fold towards the upper part of the backrest assembly.

[0018] A further improvement is that the seat surface includes a seat support and a seat plate disposed above the seat support. The front side of the seat support is symmetrically provided with connecting supports, and the rear end of the seat support is symmetrically provided with connecting parts that are rotatably connected to the outside of the two backrest tubes. The connecting supports are coaxially embedded between the front leg tube and the rear flat fork tube.

[0019] Further improvements include a braking system comprising: a brake operating component located at the top of the backrest assembly; a brake brake located on the rear side of the rear foot assembly and adapted to and abutting against the rear roller; a brake cable support; a reset component; and a brake cable connecting the brake operating component and the brake brake. The brake brake is rotatably connected to the outside of the rear swingarm tube, with an outwardly folded brake lever at the top adapted to the rear roller, and a brake cable fixing structure bent inward at the bottom. The brake cable support is suspended below the rear swingarm tube, inside the brake brake, and corresponds to the brake cable fixing structure. The brake cable support has a cable threading structure, and the reset component is a reset spring located between the brake cable fixing structure and the brake cable support.

[0020] Further improvements include armrest components that are symmetrically positioned on both sides of the backrest assembly and flip up and down relative to the backrest assembly.

[0021] Compared with the prior art, the advantages of this utility model are:

[0022] This trolley features a folding support mechanism between the front leg assembly, rear leg assembly, and backrest assembly, making it easy to unfold and fold. The support is stable, sturdy, and reliable. When folded, it takes up little space, is not easily loosened, and is easy to carry.

[0023] During the unfolding process, the limit wrench is pulled and locked with the limit pin. The backrest assembly, front leg assembly, rear leg assembly and seat unfold under the support of the support swing rod and connecting rod. The backrest tube is connected to the front leg tube through the connecting rod on the inner side of the bottom, and the front leg tube and the rear flat fork tube form a triangular stable support. By setting the connecting rod and the support swing rod on the front and rear, inner and outer opposite sides of the backrest tube, the backrest tube forms a stable support, thereby ensuring stable and reliable support and improving the load-bearing capacity of the trolley.

[0024] By setting front and rear rollers of different diameters, this application improves its adaptability to different road surfaces and obstacle crossing performance, while also enhancing the comfort of the vehicle. When folding, by pulling the limit wrench to disengage the limit pin buckle, the support swing arm rotates 180 degrees around the swing arm frame and then engages with the swing arm bracket on the other side to lock in place. This causes the support swing arm, the bottom of the backrest assembly, the connecting rod, and the bottom of the front leg assembly connected to the connecting rod to fold backward towards the bottom of the flat fork tube. At the same time, it causes the front leg assembly, the rear leg assembly, and the seat hinge to fold upward towards the backrest assembly. This method of setting the support swing arm to rotate 180 degrees around the swing arm frame and then engage with the swing arm bracket on the other side to lock in place effectively prevents the folded part from becoming loose and affecting the handling and storage.

[0025] When folding, simply operate the limit wrench to release the lock on the support lever, making it more practical and convenient. The folding support structure is also stable and not easily loosened.

[0026] When pushing a vehicle over an obstacle, the pusher can lift the front roller by stepping on the end of the foot support rod at the bottom of the rear flat fork tube. The other end of the foot support rod bends upward and extends parallel to the rear roller beyond the maximum outer diameter of the rear roller. When folded, the extension of the foot support rod can form a stable triangular support surface with the two rear wheels, making it easy to stand upright after folding. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0028] Figure 2 This is an exploded view of the components of this utility model.

[0029] Figure 3 This is an enlarged view of the folding support mechanism of this utility model.

[0030] Figure 4 This is a schematic diagram of the limit wrench of this utility model.

[0031] Figure 5 This is a schematic diagram of the folded state of this utility model.

[0032] Figure 6 This is another schematic diagram of the folded state of this utility model.

[0033] Attached image labels:

[0034] Front leg assembly 1, front leg tube 11, front leg connecting tube 12, connecting lug 13

[0035] Rear foot assembly 2, rear swingarm tube 21, swingarm connecting tube 22, swingarm swivel bracket 23, swingarm support 24.

[0036] Backrest assembly 3, backrest tube 31, push handle tube 32, backrest cushion 33, backrest connecting tube 34.

[0037] Seat surface 4, seat support 41, connecting support 42, seat plate 43.

[0038] Handrail assembly 5, braking system 6, brake operating component 61, brake brake 62, brake cable support component 63, reset component 64.

[0039] Folding support mechanism 7, support swing rod 71, limit wrench 72, connecting part 721, buckle groove 722, limit protrusion 723, grip part 724, limit pin 73, connecting rod 74, foot pedal assembly 8, foot pedal tube frame 81, foot plate 82, foot support push rod 9. Detailed Implementation

[0040] To enhance understanding of this utility model, it will be further described in detail below with reference to the accompanying drawings. This embodiment is only used to explain this utility model and does not constitute a limitation on the scope of protection of this utility model.

[0041] In the description of this utility model, it should be understood that the orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the combination or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0043] Figure 1-6 The image shows a portable handcart, including: a front leg assembly 1, with symmetrical front rollers at the bottom. The front leg assembly 1 includes symmetrically parallel front leg tubes 11 and a front leg connecting tube 12 that connects the two front leg tubes 11 laterally. The bottom end of the front leg tube 11 is detachably connected to the front rollers. The top of the front leg tube 11 is bent and tilted backward to provide a connecting through hole and is hinged and fixed to the top of the rear leg assembly 2.

[0044] The rear foot assembly 2 is hinged to the top of the front foot assembly 1 with an upward tilt at the top, and has symmetrical rear rollers at the bottom. The rear foot assembly 2 includes two symmetrically arranged rear flat fork tubes 21 and a flat fork connecting tube 22 connecting the two rear flat fork tubes 21. The rear bottom of the rear flat fork tube 21 is fixedly connected to the rear rollers. The front top of the rear flat fork tube 21 is hinged to the outer side of the top of the front foot tube 11. The two rear flat fork tubes 21 are symmetrically provided with a swing arm bracket 23 adapted to the support swing arm 71. The rear flat fork tubes 21 on both sides of the swing arm bracket 23 are provided with swing arm brackets 24.

[0045] The backrest assembly 3 is connected to the inner side of the rear leg assembly 2 near the rear roller via a folding support mechanism 7 at the bottom. The backrest assembly 3 includes: a backrest tube 31 symmetrically connected to the inner side of the rear leg assembly 2, a push handle tube 32 horizontally connecting the top ends of the two backrest tubes 31, a backrest connecting tube 34 horizontally connecting the bottom of the two backrest tubes 31, and a backrest pad 33 disposed between the two backrest tubes 31.

[0046] The seat surface 4 is rotatably connected to the backrest assembly 3 on the rear side, and coaxially hinged to the top of the front leg assembly 1 and the rear leg assembly 2 on the front side; the seat surface 4 includes: a seat support 41 and a seat plate 43 disposed above the seat support; the front side of the seat support 41 is symmetrically provided with connecting supports 42; the rear end of the seat support 41 is symmetrically provided with connecting parts that are rotatably connected to the outside of the two backrest tubes 31; the connecting supports 42 are coaxially embedded between the front leg tube 11 and the rear flat fork tube 21.

[0047] The folding support mechanism 7 is rotatably connected to the rear leg assembly 2 and rotates back and forth around the rear leg assembly 2 to drive the front leg assembly 1, backrest assembly 3, and seat 4 to unfold and fold. The folding support mechanism 7 includes: a support swing rod 71 connecting the rear leg assembly 2 and the backrest assembly 3, a limiting wrench 72 set at one end of the support swing rod 71, a limiting pin 73 adapted to the limiting wrench 72, and a connecting rod 74 connecting the backrest assembly 3 and the bottom of the front leg assembly 1. The limiting pin 73 is set on the rear leg assembly 2 outside the swing end of the support swing rod 71. One end of the support swing rod 71 is rotatably connected to the rear leg assembly 2, and the other end is rotatably connected to the backrest assembly 3 and can be folded and unfolded back and forth relative to the rear leg assembly 2. This makes the folding and unfolding operation of the trolley convenient, the support stable and reliable. The support swing rod 71 simultaneously connects the backrest assembly 3, the connecting rod 74, the front leg assembly 1, the rear leg assembly 2, and the seat 4, ensuring that the connection of each component is reliable and not easy to loosen. After folding, the space is small, which is suitable for transportation and storage, and it is easy to carry.

[0048] Specifically: the connecting rod 74 is located on the inner side of the bottom of the front leg tube 11 and above the front leg connecting tube 12; symmetrical swing arm brackets 23 adapted to the supporting swing arm 71 are provided on the two rear horizontal fork tubes 21; swing arm brackets 24 are provided on the rear horizontal fork tubes 21 on both sides of the swing arm bracket 23; the swing arm brackets 24 are provided with slots adapted to the supporting swing arm 71; the limiting wrench 72 is coaxially located on the outer side of the connection end between the supporting swing arm 71 and the backrest assembly 3, and is matched with the limiting pin 73 located on one side of the swing arm bracket 24; by providing swing arm brackets 24 adapted to the supporting swing arm 71 on the rear horizontal fork tubes 21 on both sides of the swing arm bracket 23, the supporting swing arm 71 in different positions is limited, ensuring that the whole is stable and not loose when unfolded and folded; the bottom of the backrest tube 31 is rotatably connected to the rear horizontal fork tube 21 through the supporting swing arm 71 and the inner side of the bottom of the backrest tube 31 through... The connecting rod 74 is connected to the front leg tube 11, forming a triangular stable support between the front leg tube 11 and the rear horizontal fork tube 21. The connecting rod 74 and the support swing rod 71 are respectively located on the front, back and inner / outer opposite sides of the backrest tube 31, forming a stable support for the backrest tube 31. Pulling the limit wrench 72 releases the connection between the limit wrench 72 and the limit pin 73, causing the support swing rod 71 to rotate 180 degrees around the swing rod frame 23 and then be fitted and locked with the swing rod bracket 24 on the other side. At the same time, the bottom of the backrest assembly 3 connected to the support swing rod 71, the connecting rod 74, and the bottom of the front leg assembly 1 connected to the connecting rod 74 are folded towards the bottom of the rear horizontal fork tube 21, and the hinge of the front leg assembly 1, the rear leg assembly 2, and the seat surface 4 are folded towards the top of the backrest assembly 3. The folding operation is simple and convenient, and the folding is compact and space-saving. It can effectively prevent the folding from being loose and affecting the handling and storage, thus making it easy to carry when going out. The limit wrench 72 and the limit pin 73 can be set on both sides of the rear horizontal fork tube 21, or they can be set on only one side of the rear horizontal fork tube 21; the limit pin 73 can be set on the rear horizontal fork tube 21 outside the swing arm bracket 24 in the extended position of the support swing arm 71, or it can be symmetrically set on the rear horizontal fork tube 21 outside the two swing arm brackets 24.

[0049] An alternative implementation: such as Figure 1 , 2 As shown, a connecting lug 13 is provided in the middle of the front foot connecting tube 12. A foot pedal assembly 8 can also be rotatably mounted on the connecting lug 13. The foot pedal frame 81 and the foot plate 82 set at the bottom of the foot pedal frame 81 are composed of a rotating shaft adapted to the connecting lug 13 on the top of the foot pedal frame 81. The top of the foot pedal frame 81 rotates to abut against the inside of the front foot connecting tube 12. The foot pedal assembly 8 can improve the safety and comfort of the passengers.

[0050] An alternative implementation: such as Figure 4As shown, the limit wrench 72 includes a connecting part 721, a handle part 724, a snap-fit ​​groove 722 disposed between the connecting part 721 and the handle part 724, and a limit protrusion 723 extending outward along one side of the snap-fit ​​groove 722. The snap-fit ​​groove 722 is adapted to the limit pin 73.

[0051] An alternative implementation: such as Figure 1 , 2 As shown in Figures 5 and 6, the rear foot assembly 2 also includes a foot support rod 9 disposed at the bottom end of a rear horizontal fork tube 21. One end of the foot support rod 9 is perpendicular to the rear horizontal fork tube 21, and the other end is bent upward and extends backward parallel to the rear roller beyond the maximum outer diameter of the rear roller. The foot support rod 9 at the bottom end of the rear horizontal fork tube 21 can improve obstacle crossing performance. When pushing, if it is necessary to cross an obstacle, the pusher can lift the front roller by stepping on the end of the foot support rod 9. After folding, the extension of the foot support rod 9 can form a stable triangular support surface with the two rear wheels. After folding, it can stand upright without loosening, reducing storage space.

[0052] An alternative implementation: such as Figure 1-3 As shown, it also includes a braking system 6, which includes: a brake operating component 61 located on the top of the backrest assembly 3; a brake 62 located on the rear side of the rear foot assembly 2 and adapted to and abutting against the rear roller; a brake cable support component 63; a reset component 64; and a brake cable connecting the brake operating component 61 and the brake 62. The brake 62 is rotatably connected to the outside of the rear horizontal fork tube 21, with an outwardly folded brake lever at the top adapted to the rear roller, and a brake cable fixing structure bent inward at the bottom. The brake cable support component 63 is suspended below the rear horizontal fork tube 21, inside the brake 62, and corresponds to the brake cable fixing structure. The brake cable support component 63 has a cable threading structure. The reset component 64 is a reset spring located between the brake cable fixing structure and the brake cable support component 63 to ensure safe driving.

[0053] An alternative implementation: such as Figure 1 , 2 As shown in Figures 5 and 6, the system also includes armrest components 5 symmetrically arranged on both sides of the backrest assembly 3 and flipping up and down relative to the backrest assembly 3; the up-and-down flipping armrest components 5 can improve the safety and comfort of passengers.

[0054] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A portable handcart, characterized in that: include The front foot assembly (1) has symmetrical front rollers at the bottom; The rear foot assembly (2) is tilted upwards and hinged to the top of the front foot assembly (1), and has symmetrical rear rollers at the bottom. The backrest assembly (3) is connected at the bottom to the inner side of the rear foot assembly (2) near the rear roller via a folding support mechanism (7); The seat (4) is rotatably connected to the backrest assembly (3) on the rear side, and is coaxially hinged to the top of the front leg assembly (1) and the rear leg assembly (2) on the front side; The folding support mechanism (7) is rotatably connected to the rear leg assembly (2) and rotates around the rear leg assembly (2) to drive the front leg assembly (1), backrest assembly (3) and seat surface (4) to unfold and fold.

2. The portable handcart according to claim 1, characterized in that: The folding support mechanism (7) includes: a support swing rod (71) connecting the rear foot assembly (2) and the backrest assembly (3), a limiting wrench (72) set at one end of the support swing rod (71), a limiting pin (73) adapted to the limiting wrench (72), and a connecting rod (74) connecting the support backrest assembly (3) and the bottom of the front foot assembly (1). The limiting pin (73) is set on the rear foot assembly (2) outside the swing end of the support swing rod (71). One end of the support swing rod (71) is rotatably connected to the rear foot assembly (2), and the other end is rotatably connected to the backrest assembly (3) and can be folded and unfolded relative to the rear foot assembly (2) in the front and back.

3. The portable handcart according to claim 2, characterized in that: The front foot assembly (1) includes symmetrically parallel front foot tubes (11) and a front foot connecting tube (12) that connects the two front foot tubes (11) laterally. The bottom end of the front foot tube (11) is detachably connected to the front roller. The top of the front foot tube (11) is bent and tilted to provide a connecting through hole and is hinged to the top of the rear foot assembly (2). The connecting rod (74) is located on the inner side of the bottom of the front foot tube (11) and above the front foot connecting tube (12).

4. The portable handcart according to claim 3, characterized in that: The front foot connecting tube (12) is provided with a connecting lug (13) in the middle. The connecting lug (13) can also be provided with a foot pedal assembly (8), which is composed of a foot pedal frame (81) and a foot plate (82) at the bottom of the foot pedal frame (81). The foot pedal frame (81) is provided with a rotating shaft that is compatible with the connecting lug (13) on the top. The top of the foot pedal frame (81) rotates to abut against the inside of the front foot connecting tube (12).

5. The portable handcart according to claim 2, characterized in that: The rear foot assembly (2) includes: two symmetrically arranged rear flat fork tubes (21) and a flat fork connecting tube (22) connecting the two rear flat fork tubes (21). The rear bottom of the rear flat fork tube (21) is fixedly connected to the rear roller, and the front top of the rear flat fork tube (21) is hinged to the outer side of the top of the front foot tube (11). The two rear flat fork tubes (21) are symmetrically provided with swing arm brackets (23) adapted to the support swing arm (71). The rear flat fork tubes (21) on both sides of the swing arm bracket (23) are provided with swing arm brackets (24). The swing arm brackets (24) are provided with support swing arm brackets (24) adapted to the support swing arm (71). The support rod (71) is fitted with a slot, and the limiting wrench (72) is coaxially disposed on the outside of the connection end between the support rod (71) and the backrest assembly (3) and is fitted with a limiting pin (73) on one side of the rod bracket (24); the limiting wrench (72) includes a connecting part (721), a handle part (724) and a locking groove (722) disposed between the connecting part (721) and the handle part (724) and a limiting protrusion (723) extending outward along one side of the locking groove (722), and the locking groove (722) is fitted with a limiting pin (73).

6. The portable handcart according to claim 5, characterized in that: The rear foot assembly (2) also includes a foot support rod (9) disposed at the bottom end of a rear flat fork tube (21). One end of the foot support rod (9) is disposed perpendicular to the rear flat fork tube (21), and the other end is bent upward and extends backward parallel to the rear roller beyond the maximum outer diameter of the rear roller.

7. The portable handcart according to claim 2, characterized in that: The backrest assembly (3) includes: a backrest tube (31) connected to the inside of the rear leg assembly (2), a push handle tube (32) connecting the top ends of the two backrest tubes (31), a backrest connecting tube (34) connecting the bottom of the two backrest tubes (31), and a backrest pad (33) disposed between the two backrest tubes (31). The bottom of the backrest tube (31) is rotatably connected to the rear horizontal fork tube (21) via a support swing rod (71) and is rotatably supported on the inside of the rear horizontal fork tube (21). The bottom inner side of the backrest tube (31) is connected to the front leg tube (11) via a connecting rod (74), and the front leg tube (11) and the rear horizontal fork tube (21) form a triangular stable support. The connecting rod (74) and The support swing rod (71) is located on the front and back, and inner and outer sides of the backrest tube (31) to provide stable support for the backrest tube (31). When folding, the limit wrench (72) is pulled to disengage the limit pin (73) and the support swing rod (71) rotates 180 degrees around the swing rod frame (23) and is matched with the swing rod bracket (24) on the other side to lock and limit the movement. This causes the support swing rod (71), the bottom of the backrest assembly (3), the connecting rod (74), and the bottom of the front foot assembly (1) connected to the connecting rod (74) to fold back towards the bottom of the flat fork tube (21). At the same time, the hinge of the front foot assembly (1), the rear foot assembly (2), and the seat surface (4) folds towards the top of the backrest assembly (3).

8. The portable handcart according to claim 1, characterized in that: The seat surface (4) includes: a seat support (41) and a seat plate (43) disposed above the seat support. The seat support (41) is symmetrically provided with connecting supports (42) on the front side. The seat support (41) is symmetrically provided with connecting parts at the rear end, which are rotatably connected to the outside of the two backrest tubes (31). The connecting supports (42) are coaxially embedded between the front leg tube (11) and the rear flat fork tube (21).

9. The portable handcart according to any one of claims 1-8, characterized in that: It also includes a braking system (6), which includes: a brake operating component (61) set on the top of the backrest assembly (3), a brake (62) set on the rear side of the rear foot assembly (2) and adapted to and abutting the rear roller, a brake cable support component (63), a reset component (64), and a brake cable connecting the brake operating component (61) and the brake (62). The brake (62) is rotatably connected to the outside of the rear flat fork tube (21), with an outwardly folded brake handle at the top adapted to the rear roller, and a brake cable fixing structure bent inward at the bottom. The brake cable support component (63) is suspended below the rear flat fork tube (21), inside the brake (62), and corresponds to the brake cable fixing structure. The brake cable support component (63) is provided with a wire threading structure. The reset component (64) is a reset spring set between the brake cable fixing structure and the brake cable support component (63).

10. The portable handcart according to claim 9, characterized in that: It also includes armrest components (5) which are symmetrically arranged on both sides of the backrest assembly (3) and flip up and down relative to the backrest assembly (3).

Images