Cart folding structure and cart

Abstract

The technical scheme belongs to the technical field of carts, and particularly relates to a cart folding structure and a cart, the cart folding structure comprises a mounting seat, the mounting seat is hinged with a fixing seat, the fixing seat is used for mounting a seat, the mounting seat is also hinged with a connecting seat, and the connecting seat is used for mounting a rear supporting part and a push rod; the mounting base is provided with an adjusting mechanism, the adjusting mechanism comprises an elastic piece, a pull rod part connected to the mounting base in a sliding mode and two swing parts hinged to the mounting base, the fixing base is provided with a first positioning groove, and the mounting base is provided with a second positioning groove; the elastic part tensions the two swing parts to be embedded into the first positioning groove and the second positioning groove in a one-to-one correspondence mode to limit rotation, the pull rod part is used for driving the two swing parts to overcome the elastic force of the elastic part to achieve overturning to be separated from the corresponding first positioning groove and the second positioning groove, the mounting base drives the seat to overturn, and the connecting base drives the rear supporting part and the push rod to overturn. Folding and storage can be completed only by pulling the pull rod part, the folding steps are simplified, and folding convenience is improved.

Description

Technical Field

[0001] The present technical solution relates to the technical field of carts, and in particular to a cart folding structure and a cart. Background Art

[0002] A folding chair is a lightweight, foldable seat designed for easy carrying and storage. It is a practical, convenient, space-saving seat suitable for a variety of occasions and purposes.

[0003] For example, Chinese patent CN111994161A discloses a folding stroller, including a body, which includes a front support part and a rear support part, the front support part is provided with a seat, the backrest of the seat is provided with a buckle, the push rod assembly includes a connecting seat and a rod member, the rod member is fixed with a clamp corresponding to the buckle, the rod member includes a fixed tube and a sliding rod, the front support part is fixed with a connecting part, the connecting part is hinged with the connecting seat, the connecting part has a limiting groove, the limiting assembly includes an adjustment block and a limiting column hinged to the connecting seat, the limiting column and the limiting groove are limited by clamping, when the stroller needs to be folded, the buckle and the clamp are disengaged, the seat is flipped to fit the front support part, the locking member is adjusted to retract the sliding rod, the sliding rod slides to contact the dial block to flip the adjustment block, thereby disengaging the limiting column of the limiting assembly from the limiting groove, flipping the gripping rod to fold the front support part, the rear support part and the push rod assembly, and the limiting hole on the elastic strip of the front baffle is hooked into the corresponding hook for further positioning to achieve disassembly.

[0004] The above-mentioned folding cart requires multiple steps to be folded, which makes the folding process complicated and troublesome to use, and needs to be improved. Summary of the invention

[0005] In order to improve the problem that the steps of folding a cart are complicated and thus inconvenient to use, the present technical solution provides a cart folding structure and a cart.

[0006] The purpose of this technical solution is achieved in this way:

[0007] A folding structure of a cart, comprising a mounting seat, the mounting seat being hinged with a fixing seat, the fixing seat being used for mounting a seat, the mounting seat being further hinged with a connecting seat, the connecting seat being used for mounting a rear support part and a push rod;

[0008] The mounting seat is provided with an adjustment mechanism, which includes an elastic member, a pull rod portion slidably connected to the mounting seat, and two swinging portions hinged to the mounting seat. The fixed seat is provided with a positioning groove 1, and the mounting seat is provided with a positioning groove 2. When the positioning groove 1 is opposite to the positioning groove 2, the elastic member tightens the two swinging portions and corresponds to the positioning groove 1 and the positioning groove 2 to limit rotation. The pull rod portion is used to drive the two swinging portions to overcome the elastic force of the elastic member to realize flipping and disengagement from the corresponding positioning groove 1 and the positioning groove 2.

[0009] Through the above technical solution, when the cart folding structure is in normal use, the seat is pushed to drive the fixed seat to rotate along the hinge axis, and at the same time, the push rod is pushed so that the connecting seat drives the rear support part to rotate along the hinge axis. At this time, the notches of the positioning groove one and the positioning groove two are facing oppositely, and an adjustment mechanism is installed in the mounting seat. Under the elastic force of the elastic member, the two swinging parts are tightened and the pull rod part is driven to slide toward the mounting seat. The two swinging parts of the adjustment mechanism are respectively embedded in the positioning groove one and the positioning groove two. One swinging part limits the rotation of the fixed seat to support the seat, and the other swinging part limits the rotation of the connecting seat to support The rear support part and the push rod are supported to improve the stability of use. The pull rod part is pulled to overcome the elastic force of the elastic part and then slides toward the outside of the mounting seat. The pull rod part drives the two swinging parts to swing at the same time. At this time, the two swinging parts are respectively disengaged from the positioning groove one and the positioning groove two. After the two swinging parts are adjusted to a certain angle, the mounting seat can be rotated and drive the seat to flip over, and the connecting seat can be rotated and drive the rear support part and the push rod to flip synchronously, thereby optimizing the folding structure, so that when storage is required, folding can be completed by only pulling the pull rod part, thereby simplifying the folding steps and making the folding operation more convenient.

[0010] Preferably, the mounting seat is provided with a hinge rod, the swinging part is provided with a hinge hole corresponding to the hinge rod, and the swinging part is hinged by passing the hinge rod through the hinge hole.

[0011] Through the above technical solution, the mounting seat is fixed with a hinge rod, and the swinging part is penetrated by a hinge hole adapted to the hinge rod. The swinging part and the mounting seat are hinged by the hinge rod passing through the hinge hole. The hinge rod is set as the hinge axis to ensure the stability and reliability of the hinge between the swinging part and the mounting seat.

[0012] Preferably, the swing part is provided with an embedding groove, which is located at one end of the swing part close to the pull rod part, and the swing part is embedded with the pull rod part through the embedding groove. The pull rod part is provided with a strip hole, and the swing part is provided with a limit rod, which passes through the strip hole. The limit rod slides along the length direction of the strip hole to limit the rotation range of the swing part.

[0013] Through the above technical scheme, the embedding groove contacts the pull rod part vertically through one side of the swinging part, the shape and size of the embedding groove match the thickness of the pull rod part, and the embedding groove is embedded close to the pull rod part so that both sides of the swinging part can protrude to the through-openings on both sides of the strip hole. The limit rod passes through the swinging part and is embedded in the strip hole. The limit rod serves as a movable range along the strip hole, thereby limiting the rotation range of the limit rod. When the railing part slides, the inner walls of the upper and lower sides of the strip hole can form an abutment against the limit rod to achieve pushing or pulling of the swinging part, thereby improving the accuracy and stability of the rotation of the swinging part.

[0014] Preferably, the swinging part is provided with a countersunk hole, and the countersunk hole is opened on the end surfaces of both sides of the swinging part corresponding to the limiting rod, and the limiting rod is passed through the countersunk hole. The limiting rod has a rod head, and the rod head is located in the countersunk hole.

[0015] Through the above technical scheme, the position of the limit rod corresponding to the countersunk hole corresponds to the end faces that pass through the two sides of the swinging part, and the countersunk hole and the strip hole are connected to each other, so that the limit rod enters the strip hole after passing through the countersunk hole on one side, and is embedded in the countersunk hole on the other side through the strip hole to be fixed, so that the head of the limit rod is hidden in the countersunk hole, and the countersunk hole provides a makeshift space to reduce space occupancy.

[0016] Preferably, the mounting seat is provided with a fixing rod, the swinging portion is provided with a fixing protrusion, one end of the elastic member is connected to the fixing rod, and the other end of the elastic member is connected to the fixing protrusion.

[0017] Through the above technical solution, the mounting seat is fixed with a fixing rod, and the swinging part is fixed with a fixing protrusion at a position corresponding to the fixing rod. The fixing rod cooperates with the fixing protrusion to form a stable connection between the swinging part and the mounting seat, thereby making the installation and adjustment of the elastic part easier.

[0018] Preferably, the mounting seat is provided with a clearance groove, and the clearance groove is used for the push rod to be inserted into the clearance groove after being flipped over.

[0019] Through the above technical solution, the size and shape of the make way groove are matched with the push rod, ensuring that the push rod can be accurately embedded in the make way groove after flipping, improving the accuracy and stability of folding, avoiding the push rod flipping and conflicting with the mounting seat, increasing the rotation range of the push rod, and optimizing the folding function.

[0020] Preferably, the pull rod portion is provided with a carrying handle, and the carrying handle is hinged to the pull rod portion.

[0021] Through the above technical solution, the hand-held part is installed on the pull rod part, which increases the force application points on the pull rod part. The design of the hand handle allows the user to easily pull the pull rod part to perform folding operations. The hand handle is hinged to the pull rod part so that the user can hold the hand handle from different angles, thereby improving the safety and portability of the operation.

[0022] A cart comprises a cart frame and also comprises any of the above-mentioned cart folding structures, wherein the cart frame comprises a front support part and a rear support part, wherein the front support part is fixed to the mounting seat, the front support part is provided with a front wheel, a seat is mounted on the fixing seat, the rear support part is fixed to the connecting seat, the rear support part is provided with a rear wheel, a push rod is inserted into the rear support part, and when the pull rod part is pulled, the two swing parts are disengaged from the first positioning groove and the second positioning groove, and the rear support part and the seat are flipped over to achieve folding.

[0023] Through the above technical solution, when the cart is in normal use, the front support part is fixed to the mounting seat, the rear support part is fixed to the connecting seat, and the two swinging parts are respectively embedded in the positioning groove one and the positioning groove two so that the front support part and the rear support part are relatively fixed. The front support part and the rear support part cooperate to provide a supporting effect, so that the cart frame can be stably placed on a horizontal plane, and the front wheels and the rear wheels cooperate to rotate so that the cart can be freely moved in different scenarios, thereby improving the convenience of moving the cart frame. At this time, the seat can be used for riding, and the moving direction is controlled by the push rod, so as to optimize the operating feel and reduce fatigue in use. When folding is required, the pull rod is pulled to disengage the two swinging parts from the positioning groove one and the positioning groove two. At this time, the seat is flipped by pushing the seat, and the push rod is pushed to drive the rear support part to flip at the same time to achieve folding and storage, thereby reducing the space required for storage of the cart and improving the portability of the cart.

[0024] Compared with the prior art, the technical solution has the following outstanding and beneficial technical effects:

[0025] 1. The technical solution is provided with an adjustment mechanism on the mounting seat, the adjustment mechanism includes an elastic member, a pull rod portion and two swinging portions, the mounting seat is further hinged with a fixed seat and a connecting seat, the fixed seat is provided with a positioning groove 1, and the mounting seat is provided with a positioning groove 2. When the positioning groove 1 is opposite to the positioning groove 2, the elastic member tightens the two swinging portions to be embedded in the positioning groove 1 and the positioning groove 2 one by one to limit the rotation, thereby achieving the supporting effect on the seat, the rear support portion and the push rod, and improving the stability;

[0026] 2. In the technical solution, a strip hole is opened in the pull rod part, and a limiting rod passing through the strip hole is fixed to the swing part. The pull rod part is pulled to drive the two swing parts to overcome the elastic force of the elastic part to realize flipping, so that the two swing parts are disengaged from the corresponding positioning groove 1 and positioning groove 2 to complete the folding, thereby simplifying the folding steps and improving the convenience of the folding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall structure of this embodiment;

[0028] Figure 2 It is a schematic diagram of the overall structure of the folding structure of the cart in the embodiment;

[0029] Figure 3 It is a partial cross-sectional schematic diagram of the folding structure of the cart in the embodiment;

[0030] Figure 4 For example, the folding structure of the cart Figure 3 Another schematic diagram of the operating structure;

[0031] Figure 5 It is a schematic diagram of the overall structure of the adjustment mechanism in the folding structure of the cart in the embodiment;

[0032] Figure 6 It is a partial exploded schematic diagram of the adjustment mechanism in the folding structure of the cart in the embodiment;

[0033] Figure 7 For this embodiment Figure 1 Another schematic diagram of the operating structure.

[0034] 1. Mounting seat; 2. Fixing seat; 3. Connecting seat; 4. Adjusting mechanism; 41. Elastic member; 42. Pull rod portion; 43. Swinging portion; 5. Positioning slot 1; 6. Positioning slot 2; 7. Articulated rod; 8. Articulated hole; 9. Embedded groove; 10. Strip hole; 11. Limiting rod; 12. Countersunk hole; 13. Rod head; 14. Fixing rod; 15. Fixing protrusion; 16. Clearance groove; 17. Handle; 18. Carriage frame; 181. Front supporting portion; 182. Rear supporting portion; 19. Front wheel; 20. Seat; 21. Rear wheel; 22. Push rod. DETAILED DESCRIPTION

[0035] The specific implementation of the technical solution is further described in detail below with reference to the accompanying drawings.

[0036] Example:

[0037] See also Figure 1 and Figure 2 A folding structure of a cart includes a mounting seat 1, which is provided with a fixing seat 2, which is located at the upper end of the mounting seat 1, and the lower end of the fixing seat 2 is embedded in the mounting seat 1, the fixing seat 2 is hinged to the mounting seat 1, and the end of the fixing seat 2 away from the hinge is used for the installation of a seat 20, the mounting seat 1 is provided with a connecting seat 3, the connecting seat 3 is located at the rear end relative to the mounting seat 1, the connecting seat 3 is hinged to the mounting seat 1, and the hinge axis of the connecting seat 3 is parallel to the hinge axis of the fixing seat 2, the connecting seat 3 is used for the installation of a rear support portion 182 and a push rod 22, the mounting seat 1 is provided with a makeshift groove 16, the makeshift groove 16 is provided on the lower end surface of the mounting seat 1, and the makeshift groove 16 runs through the corresponding end surface, and the makeshift groove 16 forms a makeshift space corresponding to the position of the push rod 22.

[0038] See also Figure 3 as well as Figure 4The mounting seat 1 is provided with an adjusting mechanism 4, which is located inside the mounting seat 1. The adjusting mechanism 4 includes an elastic member 41, a swinging portion 43 and a pull rod portion 42. The pull rod portion 42 is slidably connected to the mounting seat 1, and one end of the pull rod portion 42 along the sliding direction extends to the outside of the mounting seat 1. There are two swinging portions 43, and the two swinging portions 43 are arranged corresponding to the pull rod portion 42 and are respectively located on both sides of the pull rod portion 42. The fixed seat 2 is provided with a positioning groove 1 5, which is located at one end of the fixed seat 2 close to the mounting seat 1, and the notch direction of the positioning groove 1 5 is arranged toward one of the swinging portions 43. The shape and size of the positioning groove 1 5 are adapted to the swinging portion 43. The mounting seat 1 is provided with a positioning groove 2 6, which is located at one end of the connecting seat 3 close to the mounting seat 1, and the notch direction of the positioning groove 2 6 is arranged toward the other swinging portion 43. The shape and size of the positioning groove 2 6 are adapted to the swinging portion 43.

[0039] The swinging part 43 is hinged to the mounting seat 1. The specific hinge method is that a hinge hole 8 is opened in the swinging part 43, and the two hinge holes 8 are arranged in a one-to-one correspondence with the two swinging parts 43. Each hinge hole 8 passes through the corresponding swinging part 43, and the penetration direction is parallel to the hinge axis of the fixing seat 2. Two hinge rods 7 are fixed at the position of the mounting seat 1 corresponding to the hinge hole 8. The two hinge rods 7 are arranged in a one-to-one correspondence with the two hinge holes 8. The hinge is realized by the two hinge rods 7 passing through the corresponding two hinge holes 8. The hinge rod 7 is used to provide a hinge axis.

[0040] A fixing rod 14 is provided at a position of the mounting seat 1 corresponding to the fixing protrusion 15. There are multiple fixing rods 14, each of which is fixed to the inner wall inside the mounting seat 1. Each fixing rod 14 protrudes and is fixed to the corresponding end face, and the protruding direction is parallel to the hinge axis of the swinging part 43. There are multiple elastic members 41, and the elastic members 41 can specifically be reset springs. Each elastic member 41 corresponds to the fixing rod 14 one by one, and one end of each elastic member 41 is connected to the corresponding fixing rod 14.

[0041] See also Figure 5 as well as Figure 6 Each swinging portion 43 is provided with two fixing protrusions 15, each fixing protrusion 15 corresponds to each elastic member 41 one by one, each fixing protrusion 15 is located on the end surface of the swinging portion 43 close to the elastic member 41, each fixing protrusion 15 protrudes and is fixed to the corresponding end surface, and the other end of the elastic member 41 is fixed to the corresponding fixing protrusion 15. The elastic force of the elastic member 41 makes the pull rod portion 42 have a tendency to slide into the swivel seat.

[0042] Each swinging part 43 is provided with an embedding groove 9, and the two embedding grooves 9 are arranged in a one-to-one correspondence with the two swinging parts 43. Each embedding groove 9 is formed on the end face of the swinging part 43 close to the pull rod part 42, and the notch direction of each embedding groove 9 is toward the pull rod part 42. The embedding groove 9 and the pull rod part 42 are correspondingly embedded, so that the two swinging parts 43 are close to each other. The pull rod part 42 is penetrated by a strip hole 10. There are two strip holes 10, and the two strip holes 10 correspond to the two swinging parts 43 one-to-one. The length direction of each strip hole 10 is arranged along the length direction of the pull rod part 42. Each swinging part 43 is provided with a limit rod 11, and the limit rod 11 is located in the strip hole 10. The limit rod 11 adjusts the position along the length direction of the strip hole 10 to limit the rotation range of the swinging part 43.

[0043] Each swinging part 43 is provided with two countersunk holes 12 on the end faces on both sides of the hinge axis of the swinging part 43, and the two countersunk holes 12 are located at one end of the swinging part 43 close to the pull rod part 42, and the two countersunk holes 12 are correspondingly connected with the strip hole 10, and the countersunk holes 12 are step holes. The end of the countersunk hole 12 close to the pull rod part 42 is hole one and the other end is hole two. The channel cross-section of hole one is smaller than hole two. One end of the limiting rod 11 passes through one of the countersunk holes 12 and enters the strip hole 10, and after passing through the strip hole 10, it is embedded in the other correspondingly connected countersunk hole 12. The limiting rod 11 has a rod head 13, and the rod head 13 is adapted to hole two and the rod head 13 is placed in hole two to limit the limiting rod 11 from protruding out of the side wall of the swinging part 43.

[0044] The pull rod portion 42 is provided with a carrying handle 17 , which is located at one end of the pull rod portion 42 away from the mounting seat 1 , and the carrying handle 17 is hinged to the pull rod portion 42 , and the hinge axis of the carrying handle 17 is parallel to the hinge axis of the swing portion 43 .

[0045] The specific working process of this program is as follows:

[0046] The technical solution is that the mounting seat 1 is hinged with a fixed seat 2 and a connecting seat 3, the connecting seat 3 is provided with a positioning groove 1 5, the mounting seat 1 is provided with a positioning groove 2 6, and when the fixed seat 2 and the mounting seat 1 are rotated along the hinge axis until the positioning groove 1 5 and the positioning groove 2 6 are opposite, an adjustment mechanism 4 is installed in the mounting seat 1, and the two swinging parts 43 are tightened under the elastic force of the elastic member 41 and drive the pull rod part 42 to slide toward the mounting seat 1, and the two swinging parts 43 are embedded in the positioning groove 1 5 and the positioning groove 2 6 in a one-to-one correspondence to limit the rotation, and the two swinging parts 43 cooperate to support the seat 20, the support The support part and the push rod 22 improve stability. When it is necessary to store, the pull rod part 42 is pulled outward, the pull rod part 42 overcomes the elastic force of the elastic member 41 and drives the two swing parts 43 to swing at the same time. At this time, the two swing parts 43 are rotated and disengaged from the positioning groove 1 5 and the positioning groove 2 6 respectively, the mounting seat 1 drives the seat 20 to flip, and the connecting seat 3 drives the rear support part 182 and the push rod 22 to flip, and the folding structure is optimized, so that when it is necessary to store, the folding can be completed by pulling the pull rod part 42, thereby simplifying the folding steps and making the folding operation more convenient.

[0047] See also Figure 1 as well as Figure 7 A cart includes a cart frame 18, the cart frame 18 is provided with two parts, the two parts are a front support part 181 and a rear support part 182, the front support is located in front of the rear support part 182, the front support part 181 is fixedly connected to the mounting seat 1, the rear support part 182 is fixedly connected to the connecting seat 3, the front support part 181 is provided with a front wheel 19, the front wheel 19 is provided with two, the two front wheels 19 are symmetrically arranged, the two front wheels 19 are hinged to the front support part 181, and the hinge axis of each front wheel 19 is parallel to the swing part 43 The rear support portion 182 is provided with a rear wheel 21, and two rear wheels 21 are stacked on each other. The two rear wheels 21 are both hinged to the rear support portion 182, and the hinge axis of each rear wheel 21 is parallel to the hinge axis of the front wheel 19. In this example, the interval between the two rear wheels 21 is greater than the interval between the two front wheels 19. The fixed seat 2 is provided with a seat 20, and the seat 20 is fixedly connected to the fixed seat 2. The rear support portion 182 is provided with a push rod 22, and the push rod 22 is plugged and fixed to the rear support portion 182.

[0048] The specific working process of this program is as follows:

[0049] The technical solution is that the cart frame 18 includes a front support part 181 and a rear support part 182, the front support part 181 is fixedly connected to the mounting seat 1, the rear support part 182 is fixed to the connecting seat 3, and the two swing parts 43 are respectively embedded in the positioning groove 1 5 and the positioning groove 2 6 so that the front support part 181 and the rear support part 182 are relatively fixed for support, so that the cart frame 18 can be stably placed on a horizontal plane, the front wheel 19 and the rear wheel 21 are rotated in coordination so that the cart can move freely, and the moving direction is controlled by the push rod 22, thereby improving the cart frame. In order to facilitate the movement of the position of the stroller 18, a seat 20 is installed on the fixed seat 2. When it needs to be folded, the pull rod part 42 is pulled to disengage the two swing parts 43 from the positioning groove 1 5 and the positioning groove 2 6. At this time, the seat 20 is pushed to flip in the direction close to the front support part 181 and abut against the front support part 181, and then the push rod 22 is pushed in the direction of the front support part 181. The push rod 22 drives the rear support part 182 to flip until it abuts against the front support part 181 to achieve folding, thereby reducing the space required for the storage of the stroller and improving the portability of the stroller.

[0050] The above shows and describes the basic principle and main features of the technical solution and the advantages of the technical solution. The technicians in this industry should understand that the technical solution is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the technical solution. Without departing from the spirit and scope of the technical solution, the technical solution will have various changes and improvements, which fall within the scope of the technical solution to be protected. The scope of protection claimed by the technical solution is defined by the attached claims and their equivalents.

Claims

1. A folding structure of a cart, comprising a mounting seat (1), characterized in that: The mounting seat (1) is hingedly connected to a fixing seat (2), and the fixing seat (2) is used for mounting the seat. The mounting seat (1) is also hingedly connected to a connecting seat (3), and the connecting seat (3) is used for mounting the rear support part and the push rod. The mounting seat (1) is provided with an adjustment mechanism (4), and the adjustment mechanism (4) includes an elastic member (41), a pull rod portion (42) slidably connected to the mounting seat (1), and two swinging portions (43) hinged to the mounting seat (1); the fixed seat (2) is provided with a positioning groove (5), and the mounting seat (1) is provided with a positioning groove (6); when the positioning groove (5) is opposite to the positioning groove (6), the elastic member (41) tightens the two swinging portions (43) so that they are embedded in the positioning groove (5) and the positioning groove (6) one by one to limit rotation; the pull rod portion (42) is used to drive the two swinging portions (43) to overcome the elastic force of the elastic member (41) to achieve flipping and disengagement from the corresponding positioning groove (5) and the positioning groove (6).

2. The folding structure of the stroller according to claim 1, characterized in that: The mounting seat (1) is provided with a hinge rod (7), the swing portion (43) is provided with a hinge hole (8) corresponding to the hinge rod (7), and the swing portion (43) passes through the hinge hole (8) via the hinge rod (7) to achieve hinge connection.

3. The folding structure of the stroller according to claim 1, characterized in that: The swinging part (43) is provided with an embedding groove (9), and the embedding groove (9) is located at one end of the swinging part (43) close to the pulling rod part (42). The swinging part (43) is embedded with the pulling rod part (42) through the embedding groove (9). The pulling rod part (42) is provided with a strip hole (10). The swinging part (43) is provided with a limiting rod (11), and the limiting rod (11) passes through the strip hole (10). The limiting rod (11) slides along the length direction of the strip hole (10) to limit the rotation range of the swinging part (43).

4. The folding structure of the stroller according to claim 3, characterized in that: The swinging portion (43) is provided with a countersunk hole (12), and the countersunk hole (12) is opened on the end surfaces of both sides of the swinging portion (43) corresponding to the limiting rod (11), and the countersunk hole (12) is used for the limiting rod (11) to pass through, and the limiting rod (11) has a rod head (13), and the rod head (13) is located in the countersunk hole (12).

5. The folding structure of the stroller according to claim 1, characterized in that: The mounting seat (1) is provided with a fixing rod (14), the swinging portion (43) is provided with a fixing protrusion (15), one end of the elastic member (41) is connected to the fixing rod (14), and the other end of the elastic member (41) is connected to the fixing protrusion (15).

6. The folding structure of the stroller according to claim 1, characterized in that: The mounting seat (1) is provided with a clearance groove (16), and the clearance groove (16) is used for the push rod (22) to be inserted into the clearance groove after being turned over.

7. The folding structure of the stroller according to claim 1, characterized in that: The pull rod portion (42) is provided with a carrying handle (17), and the carrying handle (17) is hinged to the pull rod portion (42).

8. A cart, comprising a cart frame (18), characterized in that: It also includes the cart folding structure described in any one of claims 1 to 7, the cart frame (18) includes a front support part (181) and a rear support part (182), the front support part (181) is fixed to the mounting seat (1), the front support part (181) is provided with a front wheel (19), a seat (20) is installed on the fixed seat (2), the rear support part (182) is fixed to the connecting seat (3), the rear support part (182) is provided with a rear wheel (21), and the rear support part (182) is connected with a push rod (22), when the pull rod part (42) is pulled, the two swing parts (43) are disengaged from the positioning groove one (5) and the positioning groove two (6), and the rear support part (182) and the seat (20) are flipped over to achieve folding.

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