Trolley with stable storage function

Abstract

The invention relates to the technical field of trolleys, and discloses a trolley with a stable storage function, the trolley comprises a base assembly and a deck plate, the base assembly comprises a base main body, a hinge and a tension spring, the base main body is connected with a plurality of base supporting legs capable of being folded and swinging, and the base supporting legs are connected with the base main body through the hinge; two ends of the tension spring are respectively connected with the base support leg and the base main body; the foldable and swingable base supporting legs are connected through the hinges, so that the whole base assembly can be folded, and the transportation and storage volume is obviously reduced; the tension springs are connected with the base supporting legs and the base body, tension can be provided in the folded state, the base supporting legs are automatically tensioned to be close to the base body, the base supporting legs are prevented from being accidentally opened and shaken in the transportation or storage process, and compactness and stability are kept. And in the unfolding state, the tension of the tension spring also acts on the base supporting legs, so that the base supporting legs tend to be kept at the unfolding position relative to the base main body, initial locking force is provided, the stability during use is enhanced, and shaking is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of trolleys, and more specifically, to trolleys with stable storage functions. Background Technology

[0002] Traditional trolleys are typically simple in design, have limited functionality, and present numerous inconveniences when stored. For example, the base legs of the trolley lack stability when folded or unfolded, easily tilting or wobbling, affecting the user experience. Furthermore, the storage capacity of trolleys is usually limited, failing to meet users' high demands for space utilization and stability. Therefore, designing a trolley with stable storage capabilities can effectively solve these problems and has significant practical implications. Summary of the Invention

[0003] The purpose of this invention is to provide a trolley with stable storage function, which aims to solve the problem of insufficient stability of the base legs of the trolley when folded or unfolded in the prior art.

[0004] The present invention provides a trolley with stable storage function, comprising a base assembly and a platform. The platform is connected to the base body via a support rod. The base assembly includes a base body, a hinge, and a tension spring. Multiple foldable and swingable base legs are connected to the base body. The multiple base legs are arranged at intervals around the circumference of the base body. The base legs are connected to the base body via hinges. Casters are connected to the bottom of the base legs. The two ends of the tension spring are respectively connected to the base legs and the base body.

[0005] When the base legs are in the extended state, the tension of the tension spring keeps the base legs in a horizontal extended state relative to the base body.

[0006] When the base legs are in the folded state, the tension of the spring keeps the base legs folded relative to the base body; the two oppositely arranged base legs in the folded state are connected and fixed by a connecting structure.

[0007] Furthermore, the bottom of the base support leg is provided with an outer end plate, and one end of the tension spring is connected to the outer end plate to form an outer end connection point. The height of the outer end connection point is not lower than the axis height of the hinge.

[0008] Furthermore, an inner end plate protrudes from one end of the base body and the base support leg, and the other end of the tension spring is connected to the inner end plate to form an inner end connection point. The height of the inner end connection point is higher than the axis height of the hinge.

[0009] Furthermore, the dimensions of the tabletop are larger than the maximum external dimensions of the folded base assembly.

[0010] Furthermore, it also includes a base decorative cover for concealing the gap between the base legs and the base body.

[0011] Furthermore, the bottom of the base body is recessed inward to form a storage cavity for storing the casters.

[0012] Furthermore, the casters are fixed to the base legs by threads, the casters are swivel casters, and at least two of the casters are equipped with brake devices.

[0013] Furthermore, the connecting structure includes a flexible connecting plate, the top of the base leg is recessed inward to form a sliding groove, the connecting plate is located in the sliding groove, and the two sides of the sliding groove are respectively provided with track strips for the connecting plate to slide in an orientation. The two sides of the inner end of the connecting plate are respectively provided with limiting blocks, the limiting blocks are located in the track strips, and the outer end of the track strips is provided with stop blocks. The stop blocks and the limiting blocks are arranged opposite to each other.

[0014] When in the folded state, slide the connecting plates on the two oppositely arranged base legs. When the two connecting plates move towards each other to the set position, the limiting block abuts against the stop block. When the outer ends of the two connecting plates are connected by a snap fastener, the casters on the base legs abut against the top inner wall of the storage cavity.

[0015] Furthermore, the inner wall of the track bar is provided with a friction strip, which rubs against the connecting plate. The top surface of the connecting plate is flush with the top surface of the base leg, and a push strip is protruding from the top surface of the connecting plate.

[0016] Furthermore, the tabletop and the support rod are rotatably connected, and the bottom of the tabletop is provided with detachable magnetic pressure strips on the upper and lower sides respectively. The magnetic pressure strips are provided with a pinching strip. The bottom of the tabletop is recessed inward to form a groove, and a magnetic strip is provided in the groove. The magnetic strip extends along the length of the groove.

[0017] When the magnetic strip is placed in the groove, it is attracted to the magnetic strip by the magnet strip; when the magnetic strip is placed on the top of the table panel and arranged opposite to the magnet strip, the magnetic strip can be attracted to the top of the table panel by the magnet strip.

[0018] Compared with existing technologies, the trolley with stable storage function provided by this invention connects foldable and swingable base legs via hinges, allowing the entire base assembly to be folded up, significantly reducing transportation and storage volume. The folding and swinging of the base legs can be achieved through simple push-pull actions, without the need for additional tools or complex operations. A tension spring connects the base legs and the base body, providing tension in the folded state to automatically pull the base legs close to the base body, preventing accidental opening and shaking during transportation or storage, maintaining compactness and stability. At the same time, the connecting structure fixes the folded base legs, further improving the stability of the trolley. In the unfolded state, the tension spring also acts on the base legs, causing them to tend to remain in the unfolded position (such as a horizontal state) relative to the base body, providing initial locking force, enhancing stability during use, and reducing shaking. Multiple base legs are arranged at intervals around the circumference of the base body, forming a stable support structure that effectively distributes the weight of the platform and its load, preventing tipping and improving overall load-bearing capacity and stability. This solves the problem of insufficient stability of the trolley's base legs when folded or unfolded. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the trolley with stable storage function provided by the present invention in its usage state;

[0020] Figure 2 This is a three-dimensional schematic diagram of the folded state of the trolley with stable storage function provided by the present invention.

[0021] Figure 3 This is a three-dimensional schematic diagram of the base assembly provided by the present invention;

[0022] Figure 4 This is a cross-sectional view of the unfolded state of the base body and base legs provided by the present invention.

[0023] Figure 5 This is a cross-sectional view of the folded state of the base body and base legs provided by the present invention.

[0024] Figure 6 This is a cross-sectional schematic diagram of the two base legs connected by a connecting structure provided by the present invention;

[0025] Figure 7 This is a three-dimensional schematic diagram of the base support legs and connecting plate provided by the present invention;

[0026] Figure 8 This is a cross-sectional structural diagram of the base support legs and connecting plate provided by the present invention;

[0027] Figure 9 This is a side view sectional structural diagram of the countertop provided by the present invention.

[0028] In the diagram: base assembly 10, casters 20, support rod 30, tabletop 40, base body 11, base legs 12, hinge 13, tension spring 14, base decorative cover 15, storage cavity 16, connecting plate 17, inner end plate 111, outer end plate 121, slide groove 122, track bar 123, friction bar 124, stop block 125, shaft 131, outer end connection point 141, inner end connection point 142, limit block 171, push bar 172, buckle 173, brake device 21, magnetic pressure bar 41, gripping bar 42, groove 43, magnetic strip 44. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0031] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] Reference Figure 1-9 The image shown is a preferred embodiment of the present invention.

[0033] The trolley with stable storage function includes a base assembly 10 and a table panel 40. The table panel 40 is connected to the base body 11 via a support rod 30. The base assembly 10 includes the base body 11, a hinge 13, and a tension spring 14. Multiple foldable and swingable base legs 12 are connected to the base body 11. The multiple base legs 12 are arranged at intervals around the circumference of the base body 11. The base legs 12 are connected to the base body 11 via a hinge 13. Casters 20 are connected to the bottom of the base legs 12. The two ends of the tension spring 14 are respectively connected to the base legs 12 and the base body 11.

[0034] When the base support leg 12 is in the unfolded state, the tension of the tension spring 14 keeps the base support leg 12 in a horizontal unfolded state relative to the base body 11.

[0035] When the base support leg 12 is in the folded state, the tension of the tension spring 14 keeps the base support leg 12 in the folded state relative to the base body 11; the two oppositely arranged base support legs 12 in the folded state are connected and fixed by a connecting structure.

[0036] The aforementioned trolley with stable storage function connects to foldable and swingable base legs 12 via hinges 13, allowing the entire base assembly 10 to be folded up, significantly reducing transportation and storage volume. The folding and swinging of the base legs 12 can be achieved with simple push-pull actions, requiring no additional tools or complex operations. A tension spring 14 connects the base legs 12 and the base body 11, providing tension in the folded state to automatically pull the base legs 12 close to the base body 11, preventing accidental opening and wobbling during transportation or storage, maintaining a compact and stable structure, and simultaneously securing the folded base. The base support legs 12 further improve the stability of the trolley. In the unfolded state, the tension of the tension spring 14 also acts on the base support legs 12, making them tend to stay in the unfolded position (such as horizontal state) relative to the base body 11, providing initial locking force, enhancing stability during use, and reducing shaking. Multiple base support legs 12 are arranged circumferentially around the base body 11 to form a stable support structure, which can effectively distribute the weight of the platform 40 and its load, prevent tipping, and improve the overall load-bearing capacity and stability. This solves the problem of insufficient stability of the trolley's base support legs 12 when folded or unfolded.

[0037] There are four base legs 12, which are symmetrically distributed around the base body 11.

[0038] Structural connection and protection: The support rod 30 connects the platform panel 40 and the base body 11, providing stable support, and can be designed to be height adjustable as needed; the support rod 30 can be a telescopic support rod 30 with a telescopic structure to reduce the volume of the entire trolley.

[0039] Key functions are clearly defined and automated: One of the core functions of the tension spring 14 is clearly defined, which is that when the base support leg 12 is in the unfolded state, its tension can automatically maintain the base support leg 12 in the horizontal unfolded state.

[0040] No manual locking required: Users only need to push the base support leg 12 to a near-horizontal position, and the tension of the tension spring 14 will automatically pull it flat and hold it in that position. No additional locking or pin mechanism is required, which realizes "automatic locking" in the unfolded state, simplifies the operation steps and improves the ease of use.

[0041] Enhanced rigidity: The continuous tension of the tension spring 14 keeps the base leg 12 and the base support structure in a taut state, effectively reducing the swaying of the base leg 12 during use and improving the stability and load-bearing capacity of the table.

[0042] Stability assurance in folded state: Another core function of the tension spring 14 is clearly defined: when the base support leg 12 is folded, its tension can automatically keep the base support leg 12 close to or against the base body 11.

[0043] Compact storage: Ensures minimal volume when folded, preventing the base legs 12 from accidentally opening due to gravity or vibration during transport or storage, maintaining a compact and stable folded state for easy carrying and storage.

[0044] Preventing parts from being bumped: Keeping the parts folded tightly also reduces the risk of the base legs 12 and casters 20 being damaged by bumping into other objects when moving or storing them.

[0045] In this embodiment, the bottom of the base support leg 12 is provided with an outer end plate 121, and one end of the tension spring 14 is connected to the outer end plate 121 to form an outer end connection point 141. The height of the outer end connection point 141 is not lower than the height of the axis 131 of the hinge 13.

[0046] Optimized folding / unfolding mechanical properties: By positioning the end of the tension spring 14 furthest from the hinge 13 (outer end connection point 141) at or above the hinge 13 axis 131, the lever arm of the tension spring 14 is optimized. Simultaneously, the height design of the outer end plate 121 prevents interference between the tension spring 14 and the base leg 12 during folding, improving the trolley's service life. During the unfolding of the base leg 12, this position helps the tension spring 14 provide a greater restoring torque, allowing the base leg 12 to automatically spring open more smoothly and reliably to a horizontal position, and providing stronger tension to maintain stability when nearing horizontal. During folding, this position more effectively assists in overcoming the gravity or inertia of the base leg 12, making folding easier and more precise, and ensuring that the tension spring 14 still has sufficient tension to maintain compactness after folding.

[0047] To prevent premature loosening or failure: The height setting is higher than or equal to the hinge axis 131, which avoids the possibility of the tension spring 14 loosening or the force decreasing sharply when the base support leg 12 is unfolded to a horizontal state, thus ensuring a continuous locking effect in the unfolded state.

[0048] In this embodiment, an inner end plate 111 protrudes from one end of the base body 11 and the base support leg 12, and the other end of the tension spring 14 is connected to the inner end plate 111 to form an inner end connection point 142. The height of the inner end connection point 142 is higher than the height of the axis 131 of the hinge 13.

[0049] Further optimization of the tension direction and locking effect: the inner end connection point 142 of the tension spring 14 (on the base body 11) is required to be higher than the axis 131 of the hinge 13; combined with the requirement that the outer end connection point 141 is not lower than the axis 131 of the hinge 13, this means that when the base support leg 12 is extended to the horizontal state, the tension direction of the tension spring 14 is obliquely upward.

[0050] Enhanced locking in unfolded state: This upward pulling force generates a component force on the base leg 12, which "presses" it against the support surface of the base body 11, more effectively resisting the tendency of the leg to flip upward / outward due to load or vibration, significantly enhancing the mechanical self-locking ability and overall rigidity stability in the unfolded state; at the same time, the height design of the inner end plate 111 can further improve the stability of the base leg 12 in the folded state.

[0051] To promote the maintenance of the folded state: When folded, the direction of the tension formed by this high connection point also helps to pull the base leg 12 tightly toward the base body 11, keeping the folded state compact.

[0052] In this embodiment, the size of the tabletop 40 is larger than the maximum external dimensions of the folded base assembly 10.

[0053] Integrated storage and protection: The key effect is that the size of the tabletop 40 is larger than the maximum external dimensions of the folded base assembly 10; this means that when the trolley is fully folded, the tabletop 40 can completely cover and wrap the compactly folded base assembly 10 like a "lid".

[0054] Protect the internal structure: effectively prevent the base legs 12, casters 20, hinges 13 and other components from being bumped, scratched or contaminated (such as dust or rainwater) during transportation and storage after folding.

[0055] Neat and aesthetically pleasing shape: Forms a regular cuboid or flat cube shape, which is convenient for stacking, packaging and storage, and enhances the overall appearance and aesthetics of the product.

[0056] Anti-accidental unfolding: The covering of the table panel 40 provides a certain constraint on the internal folding structure, further preventing accidental unfolding.

[0057] In this embodiment, a base decorative cover 15 is also included to cover the gap between the base legs 12 and the base body 11.

[0058] Enhanced aesthetics: The decorative cover 15 on the base conceals the gap that inevitably exists at the connection between the base legs 12 and the base body 11 due to the hinge 13 and folding motion, making the product look cleaner and more refined.

[0059] Safety protection: Covering the gaps can prevent users' fingers, clothing or tools from accidentally getting stuck or caught, thus improving safety.

[0060] Dust and foreign object prevention: Reduces the entry of dust, debris and other foreign objects into moving parts such as hinge 13 and tension spring 14, reducing the risk of jamming, wear or abnormal noise, and extending service life.

[0061] In this embodiment, the bottom of the base body 11 is recessed inward to form a storage cavity 16 for storing the casters 20.

[0062] Ultimate space optimization and protection: A storage cavity 16 is formed by an inward recess at the bottom of the base body 11, providing a dedicated hiding space for the casters 20.

[0063] Significantly reduces folding thickness / height: The casters 20 can be fully or mostly recessed into the storage cavity 16, preventing the casters 20 from protruding outwards when folding, thus maximizing the compression of the overall height or thickness after folding and making the storage flatter.

[0064] Protective Casters 20: The casters 20 are stored in the recessed cavity, effectively preventing them from being damaged by hard objects or getting dirty during folding storage or transportation.

[0065] Prevent scratches: Avoid the protruding casters 20 from scratching other items (such as floors, vehicle interiors, other trolleys) during storage or handling.

[0066] In this embodiment, the casters 20 are connected and fixed to the base legs 12 by threads. The casters 20 are omnidirectional wheels, and at least two casters 20 are equipped with brake devices 21.

[0067] Reliable connection and maintainability: Casters 20 are fixed by threaded connection (such as bolts and nuts or the threaded rod of caster 20 screwed in).

[0068] Flexible movement in all directions: The use of omnidirectional casters 20 allows the trolley to be pushed or pulled easily and smoothly in any direction, making it extremely flexible and labor-saving to operate. It is especially suitable for use in confined spaces or work environments that require precise positioning.

[0069] Static safety and stability: At least two casters 20 are equipped with braking devices 21 (such as pedal brakes or rotary locking brakes). When the trolley needs to be fixed in one position, pressing the brake will lock the wheels, preventing accidental movement or slippage of the trolley due to uneven ground, slight contact, or load operation, significantly improving operational safety and stability. Choosing at least two casters 20 with brakes (usually diagonally arranged or on both sides of the long side) can balance cost and functional requirements while ensuring effective locking.

[0070] In this embodiment, the connecting structure includes a flexible connecting plate 17, and a groove 122 is formed by the inward recess of the top of the base support leg 12. The connecting plate 17 is located in the groove 122. Track bars 123 for the connecting plate 17 to slide in a direction are respectively protruded on both sides of the groove 122. Limiting blocks 171 are respectively protruded on both sides of the inner end of the connecting plate 17. The limiting blocks 171 are located in the track bars 123. A stop block 125 is protruded on the outer end of the track bars 123. The stop block 125 and the limiting block 171 are arranged opposite to each other.

[0071] When in the folded state, slide the connecting plates 17 on the two oppositely arranged base legs 12. When the two connecting plates 17 move towards each other to the set position, the limiting block 171 abuts against the stop block 125. When the outer ends of the two connecting plates 17 are movably connected by the buckle 173, the casters 20 on the base legs 12 abut against the top inner wall of the storage cavity 16.

[0072] Precise folding positioning: The connecting plate 17 slides in the slide groove 122, and the track bar 123 and limit block 171 ensure accurate movement path and avoid misalignment; when the limit block 171 abuts against the stop block 125, it automatically locks the folding position without the need for manual measurement.

[0073] Linkage locking mechanism: After one connecting plate 17 is fastened to the buckle hole on another connecting plate 17 by the buckle 173 to form a fastening connection, the caster 20 simultaneously presses against the top of the storage cavity 16 to form a three-point fixation (buckle 173 + two casters 20 abutting), eliminating the wobbling of the outriggers.

[0074] Ease of operation: The flexible connecting plate 17 adapts to legs that are not perfectly parallel, reducing the requirements for assembly precision.

[0075] In this embodiment, a friction strip 124 is provided on the inner side wall of the track bar 123. The friction strip 124 rubs against the connecting plate 17. The top surface of the connecting plate 17 is flush with the top surface of the base leg 12. A push strip 172 is protruding from the top surface of the connecting plate 17.

[0076] To prevent accidental slippage: Friction strip 124 increases the sliding resistance of connecting plate 17, keeping the position stable after folding.

[0077] Quick-operation design: The push bar 172 protrudes from the surface, making it easy to slide the connecting plate 17 with your fingers without tools.

[0078] In this embodiment, the table panel 40 is rotatably connected to the support rod 30. The bottom upper and lower sides of the table panel 40 are respectively provided with detachable magnetic pressure strips 41. The magnetic pressure strips 41 are provided with a pinch strip 42 protruding on them. The bottom of the table panel 40 is recessed inward to form a groove 43. A magnetic strip 44 is provided in the groove 43. The magnetic strip 44 extends along the length direction of the groove 43.

[0079] When the magnetic strip 41 is placed in the groove 43, it is attracted to the magnetic strip 44; when the magnetic strip 41 is placed on the top of the tabletop 40 and arranged opposite to the magnetic strip 44, the magnetic strip 41 can be attracted to the top of the tabletop 40 by the magnetic strip 44.

[0080] Multifunctional magnetic strip 41: When magnetic strip 41 is attached to the top of tabletop 40, it presses down paper (paper used for drawing or paper with patterns or text for viewing) or tablecloth to prevent it from shifting; or when magnetic strip 41 is attached to the top of tabletop 40, it acts as a temporary edge to prevent items from slipping (such as tools).

[0081] Humanized details: The grip strip 42 facilitates quick disassembly of the magnetic pressure strip 41, the groove 43 hides the magnetic strip 44 to prevent bumps; the detachable design makes it easy to clean or replace parts.

[0082] Tabletop 40 angle adjustment: The support rod 30 is rotatably connected to the tabletop 40, allowing the tabletop 40 to be tilted for use as a drawing board or display rack.

[0083] In this embodiment, a removable anti-slip silicone pad is embedded on the top surface of the table panel 40, and the edge of the anti-slip silicone pad is provided with an upwardly protruding edge strip; the top surface of the table panel 40 has a plurality of positioning slots recessed inward, and the bottom of the anti-slip silicone pad has a plurality of positioning pins for insertion into the positioning slots.

[0084] This design makes the installation and removal of the anti-slip silicone pad more convenient. At the same time, the design of the edge strip can effectively prevent items from sliding on the tabletop 40, improving the anti-slip performance of the trolley. The cooperation of the positioning slot and positioning pin ensures the stability of the anti-slip silicone pad during the installation process, avoiding the problem of reduced anti-slip performance due to sliding.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A trolley with stable storage function, characterized in that: The device includes a base assembly and a tabletop. The tabletop is connected to the base body via a support rod. The base assembly includes the base body, a hinge, and a tension spring. Multiple foldable and swingable base legs are connected to the base body. The multiple base legs are arranged at intervals around the circumference of the base body. The base legs are connected to the base body via hinges. Casters are connected to the bottom of the base legs. The two ends of the tension spring are connected to the base legs and the base body, respectively. When the base legs are in the extended state, the tension of the tension spring keeps the base legs in a horizontal extended state relative to the base body. When the base support leg is in the folded state, the tension of the tension spring keeps the base support leg in a folded state relative to the base body. The two oppositely arranged base legs, which are in the folded state, are connected and fixed by a connecting structure.

2. The trolley with stable storage function as described in claim 1, characterized in that, The bottom of the base support leg is provided with an outer end plate, and one end of the tension spring is connected to the outer end plate to form an outer end connection point. The height of the outer end connection point is not lower than the axis height of the hinge.

3. The trolley with stable storage function as described in claim 2, characterized in that, An inner end plate protrudes from one end of the base body and the base support leg. The other end of the tension spring is connected to the inner end plate to form an inner end connection point. The height of the inner end connection point is higher than the axis height of the hinge.

4. The trolley with stable storage function as described in claim 1, characterized in that, The dimensions of the tabletop are larger than the maximum external dimensions of the folded base assembly.

5. The trolley with stable storage function as described in claim 1, characterized in that, It also includes a base decorative cover for covering the gap between the base legs and the base body.

6. The trolley with stable storage function as described in claim 1, characterized in that, The bottom of the base body is recessed inward to form a storage cavity for storing the casters.

7. The trolley with stable storage function as described in claim 1, characterized in that, The casters are fixed to the base legs by threads, and the casters are swivel casters, with at least two of the casters equipped with brakes.

8. The trolley with stable storage function as described in any one of claims 1 to 7, characterized in that, The connecting structure includes a flexible connecting plate. The top of the base leg is recessed inward to form a sliding groove. The connecting plate is located in the sliding groove. Track strips for directional sliding of the connecting plate are respectively protruding on both sides of the sliding groove. Limiting blocks are respectively protruding on both sides of the inner end of the connecting plate. The limiting blocks are located in the track strips. Stopping blocks are protruding on the outer end of the track strips. The stopping blocks and limiting blocks are arranged opposite to each other. When in the folded state, slide the connecting plates on the two oppositely arranged base legs. When the two connecting plates move towards each other to the set position, the limiting block abuts against the stop block. When the outer ends of the two connecting plates are connected by a snap fastener, the casters on the base legs abut against the top inner wall of the storage cavity.

9. The trolley with stable storage function as described in claim 8, characterized in that, The inner wall of the track bar is provided with a friction strip, which rubs against the connecting plate. The top surface of the connecting plate is flush with the top surface of the base leg, and a push strip is protruding from the top surface of the connecting plate.

10. The trolley with stable storage function as described in any one of claims 1 to 7, characterized in that, The tabletop and the support rod are rotatably connected. The bottom and upper and lower sides of the tabletop are respectively provided with detachable magnetic pressure strips. The magnetic pressure strips are provided with a pinch strip. The bottom of the tabletop is recessed inward to form a groove. A magnetic strip is provided in the groove and the magnetic strip extends along the length of the groove. When the magnetic strip is placed in the groove, it is attracted to the magnetic strip by the magnet strip. When the magnetic strip is placed on the top of the tabletop and arranged opposite to the magnet strip, the magnetic strip can be attracted to the top of the tabletop by the magnet strip.

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