Shopping cart
By cooperating with the track and bend of the side panel of the shopping cart, the problem of weak connection strength of the existing shopping cart locking buckle is solved, realizing the smooth sliding and stable folding of the shopping cart, improving the user experience and space utilization efficiency.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- DONGGUAN BAOYU HARDWARE PRODUCTS CO LTD
- Filing Date
- 2025-01-14
- Publication Date
- 2026-07-02
Smart Images
Figure CN2025072318_02072026_PF_FP_ABST
Abstract
Description
A shopping cart Technical Field
[0001] This patent belongs to the field of shopping carts, and specifically relates to a shopping cart. Background Technology
[0002] In the current technology, shopping carts are a commonly used auxiliary tool for consumers when shopping, helping them to carry large or heavy items back to their vehicles or homes. Their usage is widespread. Users have raised higher demands for the portability and storage of shopping carts, leading to the development of folding shopping carts. The folding design allows users to easily carry and store them without taking up much space, and they are also compact and space-saving when placed at home.
[0003] The folding shopping cart disclosed in the prior art US11338835B2 achieves the folding and unfolding of the side walls by using locking buckles that slide along the edges of the two movable plates that make up the side walls. However, because the locking buckles slide on the edges of the two movable plates, the contact area between the locking buckles and the movable plates is small, the support force is relatively limited, the connection strength between the two is weak, they are easy to be damaged, and the sliding process is not smooth, resulting in a poor user experience.
[0004] Utility Model Content
[0005] This patent is proposed based on the aforementioned needs of the prior art. The technical problem to be solved by this patent is to provide a shopping cart to improve connectivity performance.
[0006] To address the aforementioned problems, the technical solution provided by this patent includes:
[0007] A shopping cart is provided, comprising: front and rear side walls extending in a left-right direction; left and right side walls extending in a front-back direction, both of which are connected to the front and rear side walls, and the connected side walls are rotatably connected; the left and right side walls include a first plate and a second plate, the first plate and the second plate being rotatably connected, a first track on the first plate and a second track on the second plate forming a locking area, the locking area being provided with a locking module including a bent portion on the first plate and a bent portion on the second plate; a locking plate, which moves in a vertical direction within the locking area, and during its movement simultaneously covers the first track and the second track. The locking plate is provided with a first adapter corresponding to the bend on the first plate and a second adapter corresponding to the bend on the second plate. When the locking plate moves to a first preset position on the locking area, the first and second adapters disengage from their corresponding bends, creating a degree of freedom for relative rotation between the first and second plates, which causes the shopping cart to deform into a folded state. When the locking plate moves to a second preset position on the locking area, the first and second adapters engage with their corresponding bends, preventing rotation of the first and second plates and keeping the shopping cart in an open state.
[0008] The above-described design enables the shopping cart to be folded and unfolded. Furthermore, during the transition between unlocking and unfolding, the locking plate moves accordingly. The area it slides over during this movement simultaneously covers both the first and second plates, ensuring a large surface contact between the locking plate and the locking area. This guarantees smooth sliding and high strength in the locked state. Additionally, because the locking plate is connected to the left and right side walls, the thickness of the left and right side walls can be designed with flexibility.
[0009] Preferably, the bent portion on the first plate is disposed in the upper and / or lower regions of the first track, and the bent portion on the second plate is disposed in the upper and / or lower regions of the second track.
[0010] Preferably, the locking plate is provided with a first groove that corresponds to and fits the bent portion of the upper region of the first track and / or the second track; when the locking plate moves to a first preset position on the locking region, the bent portion of the upper region of the first track and / or the second track disengages from the first groove, so that the first plate and the second plate can rotate relative to each other; when the locking plate moves to a second preset position on the locking region, the bent portion of the upper region of the first track and / or the second track extends at least partially into the first groove, so as to lock relative to each other and prevent rotation between the first plate and the second plate.
[0011] The above structure is used to lock and unlock the shopping cart.
[0012] Preferably, the locking plate includes a second portion that corresponds to and is adapted to the bend in the lower region of the first track and / or the second track; when the locking plate moves to a first preset position on the locking region, the second portion will disengage from the bend in the lower region of the first track and / or the second track, so that the first plate and the second plate can rotate relative to each other; when the locking plate moves to a second preset position on the locking region, the second portion extends at least partially into the bend in the lower region of the first track and / or the second track, so as to lock relative to each other and prevent rotation between the first plate and the second plate.
[0013] The above structure is used to lock and unlock the shopping cart.
[0014] Preferably, the locking area includes a first limiting groove and a second limiting groove arranged vertically on a first plate; the locking plate is provided with an elastic element, the elastic element having a degree of freedom to move perpendicular to the plane of the locking area, and the elastic element is adapted to the first limiting groove and the second limiting groove; the locking plate drives the elastic element to move between the first limiting groove and the second limiting groove, when the elastic element is embedded in the first limiting groove, the corresponding locking plate moves to a first preset position; when the elastic element is embedded in the second limiting groove, the corresponding locking plate moves to a second preset position.
[0015] The above settings ensure that the locking plate remains stationary and stable when moved to a designated position.
[0016] Preferably, the bend in the upper region of the first track and / or the second track is a first bend, the first bend including a horizontal portion extending in the horizontal direction and a vertical portion extending in the vertical direction, wherein the horizontal portion is connected to the locking region; when the locking plate is in the second preset position, the first bend and the first groove at least partially cover each other.
[0017] Preferably, the bend in the lower region of the first track and / or the second track is a second bend, which includes a horizontal portion extending in the horizontal direction and a vertical portion extending in the vertical direction, wherein the horizontal portion is connected to the locking region and the vertical portion is parallel to the locking region, thereby forming a space for the locking plate to be inserted.
[0018] Preferably, the first plate is further provided with a protruding bent portion, including a vertical portion extending in the vertical direction and a horizontal portion extending in the horizontal direction. The vertical portion is connected to the first plate, and the horizontal portion protrudes from the first plate and is parallel to the first plate. The locking plate is provided with an opening, and an embedded bent portion is provided at the opening. The embedded bent portion is located on the side of the locking plate away from the shopping cart interior, and the embedded bent portion is adapted to the protruding bent portion. During the movement of the locking plate between a first preset position and a second preset position, the protruding bent portion and the embedded bent portion at least partially cover each other.
[0019] The above settings ensure that the locking plate is fixedly connected to the first plate in the unlocked state, preventing them from falling off.
[0020] Preferably, the locking plate is provided with a preset groove, the bottom of the preset groove includes multiple spaced parts, wherein the sidewalls corresponding to some areas below the bottom of the groove are missing to provide freedom of movement and form an elastic element.
[0021] The above settings ensure that the elastic element and the locking plate are integrated, preventing the elastic element from falling off and becoming unpositionable, thus affecting its use.
[0022] Preferably, the first and second preset grooves have different depths at different positions in the vertical direction, with shallower grooves near the top and bottom ends and deeper grooves near the middle; the elastic element has a protrusion on the side near the outside of the shopping cart, and the protrusion is adapted to the first and second limiting grooves.
[0023] The above settings facilitate the movement of the elastic element without affecting the stability of the locking plate in a fixed position.
[0024] Compared to existing technologies, this patent enables the folding and unfolding of the shopping cart. Furthermore, during the transition between unlocking and unfolding, the locking plate moves accordingly. The area it slides over during this movement simultaneously covers both the first and second plates, allowing for a larger surface contact between the locking plate and the locking area. This ensures smooth sliding and high strength in the locked state. Additionally, the connection between the locking plate and the left and right side walls allows for design flexibility in the thickness of the side walls. By providing bending portions on the first and second plates, and corresponding grooves and second portions on the locking plate, locking and unlocking are achieved. In the unlocked state, the shopping cart has a certain degree of freedom to fold, while in the locked state, it has a certain degree of connection strength. Further, by providing a first and second limiting groove on the first plate, and corresponding elastic elements on the locking plate, when the locking plate moves, the elastic elements move between the first and second limiting grooves and remain relatively stable within them. Moreover, the connection between the protruding and embedded bending portions ensures that the locking plate remains relatively fixed to the first plate in both locked and unlocked states. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.
[0026] Figure 1 is a structural schematic diagram of the first side of the locking plate in an embodiment of this patent;
[0027] Figure 2 is a schematic diagram of the structure of the second side of the locking plate in an embodiment of this patent;
[0028] Figure 3 is a schematic diagram of the connection structure between the first plate and the second plate in an embodiment of this patent.
[0029] Figure 4 is a schematic diagram of the structure of the locking area in an embodiment of this patent;
[0030] Figure 5 is a schematic diagram of the connection structure when the locking plate is in the locked state in this patent embodiment;
[0031] Figure 6 is a schematic diagram of the connection structure when the locking plate is in the unlocked state in this patent embodiment;
[0032] Figure 7 is a schematic diagram of the shopping cart in the open state in an embodiment of this patent;
[0033] Figure 8 is a structural schematic diagram of the shopping cart in another open state in an embodiment of this patent;
[0034] Figure 9 is a schematic diagram of the folded state of the shopping cart in an embodiment of this patent.
[0035] Reference numerals: 1. First plate; 2. Second plate; 3. Locking area; 4. Locking plate; 5. First part; 6. Second part; 7. First limiting groove; 8. Second limiting groove; 9. Elastic element; 901. Protrusion; 10. Preset groove; 11. First bending part; 12. Second bending part; 13. First groove; 1301. First sub-groove; 1302. Second sub-groove; 14. Connecting hole; 15. First surface; 16. Second surface; 17. Protruding bending part; 18. Embedded bending part; 19. Opening; 20. Buckle; 21. Caster wheel; 23. Pull rod. Detailed Implementation
[0036] To make the objectives, technical solutions, and advantages of the embodiments of this patent clearer, the technical solutions of the embodiments of this patent will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this patent, not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0037] In the description of the embodiments of this patent, it should be noted that, unless otherwise explicitly specified and limited, the term "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.
[0038] Throughout the text, the terms “top,” “bottom,” “above,” “below,” and “on top” refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates within the device. It is understood that the device is multifunctional and independent of its spatial orientation.
[0039] To facilitate understanding of the embodiments of this patent, the following will provide further explanation and description with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this patent.
[0040] This embodiment provides a shopping cart, as shown in Figures 1-9.
[0041] As shown in Figure 8, the shopping cart is cubic in shape, with six side walls: front, rear, left, right, top, and bottom. A pull rod 23 is provided on the rear side wall of the shopping cart to adjust its length as needed. Furthermore, the pull rod 23 rotates between a first and a second limit position about the edge of the bottom wall of the shopping cart to adapt to different pulling states. In the first limit position, the pull rod 23 is in contact with the rear side wall. The front, left, rear, and right side walls are sequentially connected, and the connection between two connected side walls is rotatable.
[0042] As shown in Figures 2 and 3, both the left and right side walls include a first plate 1 and a second plate 2. The first plate 1 and the second plate 2 are rotatably connected, and a pivot connection structure is provided on the side where the first plate 1 and the second plate 2 meet, allowing the included angle between the first plate 1 and the second plate 2 to vary between 0° and 180°. Simultaneously, under the constraint of the locking plate 4, the first plate 1 and the second plate 2 can only fold towards the inside of the shopping cart when subjected to external force.
[0043] The lengths of the left and right side walls are less than the lengths of the front and rear side walls, so that when the first plate 1 and the second plate 2 change from 180° to 0°, the first plate 1 and the rear side plate, and the second plate 2 and the front side plate rotate simultaneously. The front side plate moves closer to the rear side plate until the angle between the first plate 1 and the second plate 2 is 0°. The left and right side walls are parallel to the front side wall, and at this time, it is in the folded state with the smallest volume.
[0044] The first plate 1 has a first track, and the second plate 2 has a second track. The first track and the second track form a locking area 3. A perimeter wall perpendicular to the first plate 1 and the second plate 2 surrounds the locking area 3. The vertical length of the locking area 3 is greater than the vertical length of the locking plate 4, allowing the locking plate 4 to move vertically within the locking area 3 to cooperate with the locking module within the locking area 3 to lock and unlock the shopping cart. During the up-and-down movement of the locking plate, it can simultaneously cover the first track and the second track.
[0045] As shown in Figures 1 and 2, the locking plate 4 includes a first part 5 and a second part 6 that are connected. The first part 5 is located in the upper region of the locking plate 4, and the second part 6 is located in the lower region of the locking plate 4. The locking plate 4 has a first surface 15 and a second surface 16. The first surface 15 is the side of the locking plate 4 facing the inside of the shopping cart, and the second surface 16 is the side of the locking plate 4 facing the outside of the shopping cart.
[0046] Specifically, the locking plate 4 will move vertically within the locking area 3 and remain stationary at a specific position. That is, when it moves to a certain predetermined position, it will stably remain in a certain state, and when it moves to another predetermined position, it will stably remain in another state. This is achieved through the following structural cooperation:
[0047] The locking module includes a first limiting groove 7 located at a first position and a second limiting groove 8 located at a second position, arranged vertically on a first plate 1. The depth direction of the first limiting groove 7 and the second limiting groove 8 is away from the interior of the shopping cart, and their length direction is horizontal. The first limiting groove 7 has different depths at different positions in the vertical direction, with the deepest depth at the center, gradually decreasing towards both sides. Preferably, the depth variation of the first limiting groove 7 in the vertical direction is approximately arc-shaped. The arrangement of the second limiting groove 8 is similar to that of the first limiting groove 7.
[0048] Correspondingly, the locking plate 4 is provided with an elastic element 9 that can cooperate with the first limiting groove 7 and the second limiting groove 8. This elastic element 9 has the elastic freedom to move closer to or further away from the interior of the shopping cart. The elastic element 9 has protrusions 901 on its side near the exterior of the shopping cart. These protrusions 901 are all adapted to the first limiting groove 7 and the second limiting groove 8. When the locking plate 4 is pushed vertically under external force, the elastic element 9 moves accordingly, locking and fixing itself within the positions of the first limiting groove 7 and the second limiting groove 8, thus restricting the movement of the locking plate 4. When the protrusions 901 are embedded in the first limiting groove 7, the two are relatively fixed, the locking plate 4 is in the unlocked state, and the first plate 1 and the second plate 2 can rotate relative to each other. In this case, the state of the shopping cart can be changed by rotating to alter the angle between the first plate 1 and the second plate 2, for example, folding the shopping cart from its open state. When the locking plate 4 is moved until the protrusion 901 is embedded in the second limiting groove 8, the two can remain relatively fixed without human intervention. At this time, the fixing plate is in a locked state, the first plate 1 and the second plate 2 are relatively fixed, and the state of the shopping cart cannot be changed.
[0049] Furthermore, the elastic element 9 is formed on the first portion 5, and the first portion 5 is provided with a preset groove 10. The depth of the preset groove 10 extends away from the interior of the shopping cart, and its length extends horizontally. The bottom of the preset groove 10 is divided into multiple spaced parts, one of which has a missing lower sidewall, and this part has a degree of freedom of movement, which is the elastic element 9.
[0050] The locking of the first plate 1 and the second plate 2 by means of the locking plate 4, and the unlocking of the first plate 1 and the second plate 2 by means of the locking plate 4, will be achieved by the following structure:
[0051] The locking module further includes a first bending portion 11 and a second bending portion 12, both disposed on the first plate 1 and the second plate 2. The first bending portion 11 is located in the upper part of the locking area 3, and the second bending portion 12 is located in the lower part of the locking area 3. Both the first bending portion 11 and the second bending portion 12 include a horizontal portion extending in the horizontal direction and a vertical portion extending in the vertical direction, with the horizontal and vertical portions connecting to form a bend. The first bending portion 11 is connected to the corresponding plate surface of the first plate 1 and the plate surface of the second plate 2 via its horizontal portion, and the second bending portion 12 is connected to the corresponding plate surface of the first plate 1 and the plate surface of the second plate 2 via its horizontal portion.
[0052] When the first plate 1 and the second plate 2 are on the same plane, that is, when the included angle between the first plate 1 and the second plate 2 is 180°, the first bend 11 on the first plate 1 and the first bend 11 on the second plate 2 are on the same horizontal line, and the second bend 12 on the first plate 1 and the second bend 12 on the second plate 2 are on the same horizontal line.
[0053] A first groove 13 is provided on the locking plate 4, located in the upper part of the first portion 5 on the side away from the shopping cart interior. The depth direction of the first groove 13 extends outward from the shopping cart, so that the bottom surface of the first groove 13 is closer to the outside than the opening of the first groove 13. The side surface of the first groove 13 is arranged around the bottom surface, and the lower region of the first groove 13 is provided with a structure that allows the first groove 13 to connect to a second surface 16 facing outward from the shopping cart, including but not limited to a through hole. In a feasible embodiment of this example, the first groove 13 has no lower sidewall, so that it directly connects to the other side of the locking plate 4, i.e., the second surface 16. For ease of description later, the structure connecting the first groove 13 and the second surface 16 is named the connecting hole 14.
[0054] Furthermore, the first groove 13 includes a first groove 1301 and a second groove 1302, which are separated by a baffle. The first groove 1301 corresponds to the first bend 11 on the first plate 1, and the second groove 1302 corresponds to the first bend 11 on the second plate 2.
[0055] The first bent portion 11 is structurally adapted to the first groove 13. In the locked state, the vertical portion of the first bent portion 11 extends from bottom to top into the first groove 13 through the connecting hole 14, and the horizontal portion of the first bent portion 11 abuts against the bottom surface of the first groove 13. Furthermore, the first bent portion 11 on the first plate 1 engages with the first groove 1301, and the first bent portion 11 on the second plate 2 engages with the second groove 1302.
[0056] The thickness of the first part 5 of the locking plate 4 is greater than the thickness of the second part 6, thus forming a boss on the first surface 15 of the locking plate 4. The second part 6 is adapted to the second bent part 12. In the locked state, the second part 6 will be embedded into the second bent part 12, specifically into the space formed by the horizontal and vertical parts of the second bent part 12.
[0057] The first plate 1 and the second plate 2 are fixed on a plane by the cooperation of the first groove 13 and the first bending part 11 and the second part 6 and the second bending part 12, thereby restricting the relative rotation of the first plate 1 and the second plate 2 and achieving locking.
[0058] As shown in Figure 5, when the plane of the first plate 1 and the plane of the second plate 2 overlap, that is, when the included angle between the first plate 1 and the second plate 2 is 180°, if the locking plate 4 is pushed so that the elastic element 9 is embedded in the second limiting groove 8, the horizontal part of the first bent part 11 abuts against the bottom surface of the first groove 13, the vertical part extends into the first groove 13, and the second part 6 is embedded in the space formed by the horizontal part and the vertical part of the second bent part 12, so as to fix the two ends of the locking plate 4 in the vertical direction on the first plate 1 and the second plate 2, thereby achieving locking. In this case, the first plate 1 and the second plate 2 cannot rotate relative to each other.
[0059] As shown in Figure 6, when the shopping cart changes from locked to unlocked, pushing the locking plate 4 causes the elastic element 9 to be embedded in the first limiting groove 7. At this time, the first bending part 11 is not connected to the first groove 13, and the second bending part 12 is not connected to the second part 6. The first plate 1 and the second plate 2 can rotate relative to each other, which is the unlocked state. In this state, the shopping cart can be folded and retracted into a plate-like structure to reduce the space occupied, making it convenient to carry and easy to place.
[0060] After the shopping cart is unlocked and folded, the connection between the first plate 1 and the locking element remains relatively fixed, which is achieved through the following structure:
[0061] The locking module further includes: a plurality of protruding bends 17 are provided on the side of the first plate 1 near the inside of the shopping cart. The protruding bends 17 include a vertical part that is perpendicular to the surface of the first plate 1 and a horizontal part that is parallel to the surface of the first plate 1. The vertical part is connected to the horizontal part and the vertical part is connected to the surface of the first plate 1. The horizontal part protrudes from the inside of the first plate 1.
[0062] In one feasible embodiment of this invention, the first plate 1 is provided with three protruding bends 17, two of which are arranged vertically at intervals. The upper protruding bend 17 is located between the first bend 11 and the first limiting groove 7, and the lower bend is located between the second bend 12 and the second limiting groove 8. The edges of the horizontal portions of the two protruding bends 17 coincide with the edge of the first plate 1. The horizontal position of the other bend is located away from the edge of the first plate 1, and its vertical position is located between the two protruding bends 17.
[0063] Correspondingly, the locking plate 4 is provided with a plurality of openings 19 at the corresponding positions. The openings 19 are provided with embedded bending portions 18. The embedded bending portions 18 include a vertical portion perpendicular to the locking plate 4 and a horizontal portion parallel to the locking plate 4. The vertical portion is connected to the horizontal portion, and the vertical portion is connected to one side edge of the opening 19. The horizontal portion is embedded into the side of the locking plate 4 away from the shopping cart interior.
[0064] The position of the protruding bend 17 corresponds to the position of the embedded bend 18. Specifically, the protruding bend 17 and the embedded bend 18 are partially misaligned, such that regardless of whether the shopping cart is locked or unlocked, the protruding bend 17 and the embedded bend 18 at least partially abut against each other. That is, when the shopping cart is locked, at least a portion of the horizontal portion of the protruding bend 17 abuts against the vertical portion of the embedded bend 18; when the shopping cart is unlocked, at least a portion of the horizontal portion of the protruding bend 17 abuts against the vertical portion of the embedded bend 18.
[0065] In one feasible embodiment of this example, the locking plate 4 is provided with three embedded bending portions 18, which are correspondingly provided with protruding bending portions 17 on the first plate 1, that is, the vertical portions of the protruding bending portions 17 and the vertical portions of the embedded bending portions 18 at least partially cover each other.
[0066] When the shopping cart is unlocked, the second plate 2 can rotate relative to the first plate 1 because the first bend 11 on the second plate 2 disengages from the first groove 1301 on the locking plate 4, and the second bend 12 on the second plate 2 disengages from the second part 6 on the locking plate 4. Furthermore, the locking plate 4 is always connected to the first plate 1 because the embedded bend 18 on the locking plate 4 engages with the protruding bend 17 on the first plate 1.
[0067] The shopping cart also includes a latch 20, which is disposed on the side wall of the shopping cart. For example, one side of the latch 20 is disposed on the edge of the rear side wall and rotatably connected to the rear side wall. When the shopping cart is in a folded state, the other side of the latch 20 engages with the edge of the front side wall, thus keeping the shopping cart folded. Correspondingly, when the shopping cart changes from a folded state to an open state, the latch 20 is released from contact with the front side wall, allowing the left and right side walls of the shopping cart to extend, providing freedom of movement when opening the shopping cart.
[0068] As shown in Figures 7 to 9, the bottom of the shopping cart also includes casters. The casters can be omnidirectional wheels 21 or a combination of triangular wheels and omnidirectional wheels 21. When the casters are omnidirectional wheels 21, they are located at the four corners of the bottom. When the casters are a combination of triangular wheels and omnidirectional wheels 21, the omnidirectional wheels 21 are located at the front of the bottom, and the triangular wheels are located at the rear of the bottom.
[0069] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this patent. It should be understood that the above description is only a specific embodiment of this patent and is not intended to limit the scope of protection of this patent. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this patent should be included within the scope of protection of this patent.
Claims
1. A shopping cart, characterized in that, include: The front and rear sidewalls extend in the left-right direction; The left and right side walls extend in the front-to-back direction, and both the left and right side walls are connected to the front and rear side walls, and the two side walls that are connected are rotatably connected. The left and right side walls each include a first plate and a second plate, which are rotatably connected. A first track on the first plate and a second track on the second plate form a locking area. A locking module is provided in the locking area, including a bent portion on the first plate and a bent portion on the second plate. A locking plate moves vertically within the locking area, simultaneously covering the first and second tracks. The locking plate is equipped with a first adapter corresponding to a bend on the first plate and a second adapter corresponding to a bend on the second plate. When the locking plate moves to a first preset position within the locking area, the first and second adapters disengage from their corresponding bends, creating a degree of freedom for relative rotation between the first and second plates. This rotation causes the shopping cart to fold. When the locking plate moves to a second preset position within the locking area, the first and second adapters engage with their corresponding bends, preventing rotation and keeping the shopping cart in an open state.
2. The shopping cart according to claim 1, characterized in that, The bent portion on the first plate is located in the upper and / or lower regions of the first track, and the bent portion on the second plate is located in the upper and / or lower regions of the second track.
3. The shopping cart according to claim 2, characterized in that, The locking plate is provided with a first groove that corresponds to and fits the bent portion of the upper region of the first track and / or the second track. When the locking plate moves to the first preset position on the locking area, the bent portion of the upper region of the first track and / or the second track disengages from the first groove, so that the first plate and the second plate can rotate relative to each other. When the locking plate moves to the second preset position on the locking area, the bent portion of the upper region of the first track and / or the second track extends at least partially into the first groove to lock relative to each other and prevent rotation between the first plate and the second plate.
4. The shopping cart according to claim 2, characterized in that, The locking plate includes a second part that corresponds to and is adapted to the bent portion of the lower region of the first track and / or the second track; When the locking plate moves to the first preset position on the locking area, the second part will disengage from the bend in the lower region of the first track and / or the second track, so that the first plate and the second plate can rotate relative to each other; when the locking plate moves to the second preset position on the locking area, the second part extends at least partially into the bend in the lower region of the first track and / or the second track, so as to lock relative to each other and prevent rotation between the first plate and the second plate.
5. The shopping cart according to claim 1, characterized in that, The locking area includes a first limiting groove and a second limiting groove arranged vertically on the first plate; The locking plate is provided with an elastic element, which has a degree of freedom to move in a direction perpendicular to the plane where the locking area is located, and the elastic element is adapted to the first limiting groove and the second limiting groove; the locking plate drives the elastic element to move between the first limiting groove and the second limiting groove, and when the elastic element is embedded in the first limiting groove, the corresponding locking plate moves to the first preset position; when the elastic element is embedded in the second limiting groove, the corresponding locking plate moves to the second preset position.
6. The shopping cart according to claim 5, characterized in that, The bend in the upper region of the first track and / or the second track is the first bend, which includes a horizontal portion extending in the horizontal direction and a vertical portion extending in the vertical direction, wherein the horizontal portion is in contact with the locking region; when the locking plate is in the second preset position, the first bend and the first groove at least partially cover each other.
7. The shopping cart according to claim 6, characterized in that, The bend in the lower region of the first track and / or the second track is the second bend. The second bend includes a horizontal portion extending in the horizontal direction and a vertical portion extending in the vertical direction, wherein the horizontal portion is connected to the locking region and the vertical portion is parallel to the locking region, thereby forming a space for the locking plate to be inserted.
8. The shopping cart according to claim 1, characterized in that, The first plate is also provided with a protruding bent portion, including a vertical portion extending in the up-down direction and a horizontal portion extending in the horizontal direction. The vertical portion is connected to the first plate, and the horizontal portion protrudes from the first plate and is parallel to the first plate. The locking plate is provided with an opening, and an embedded bending part is provided at the opening. The embedded bending part is located on the side of the locking plate away from the shopping cart interior, and the embedded bending part is adapted to the protruding bending part. During the movement of the locking plate between the first preset position and the second preset position, the protruding bend and the embedded bend at least partially cover each other.
9. The shopping cart according to claim 1, characterized in that, The locking plate is provided with a preset groove. The bottom of the preset groove includes multiple spaced parts, wherein the sidewalls corresponding to some areas below the bottom of the groove are missing to provide freedom of movement and form an elastic element.
10. The shopping cart according to claim 5, characterized in that, The first and second preset grooves have different depths at different positions in the vertical direction, with shallower grooves near the top and bottom ends and deeper grooves near the middle; the elastic element has a protrusion on the side near the outside of the shopping cart, and the protrusion is adapted to the first and second limiting grooves.