Portable trolley

Abstract

The utility model relates to the technical field of trolley, disclose portable trolley, base assembly includes base main part, hinge and tension spring, be connected with a plurality of collapsible swing base support leg on base main part, a plurality of base support leg along the circumferential ring of base main part interval arrangement, hinge connection between base support leg and base main part, tension spring connects base support leg and base main part, through hinge connection collapsible swing base support leg, make whole base assembly can be gathered, significantly reduce the transportation and storage volume, tension spring connects base support leg and base main part, can provide tension in the folding state, automatically base support leg is pulled close to base main part, prevent base support leg in the transportation or storage process accidental opening and shaking, keep compact and stable, under the unfolded state, the tension of tension spring also acts on base support leg, make it relative to base main part tend to keep in unfolded position, provide initial locking force, enhance the stability when using, reduce the shaking.

Description

Technical Field

[0001] This utility model relates to the technical field of trolleys, and more specifically, to portable trolleys. Background Technology

[0002] Currently, the base of trolleys (trolleys) is made of X-shaped or H-shaped one-piece molded parts, and the size of the base is often larger than the size of the tabletop. When users go out, the large size of the base makes it difficult to put in the trunk of a small vehicle, which is inconvenient to carry and affects the customer's travel. Utility Model Content

[0003] The purpose of this utility model is to provide a portable trolley, which aims to solve the problem in the prior art that the base of the trolley is too large to be placed in the trunk of a small vehicle, making it inconvenient to carry and affecting customers' travel.

[0004] This utility model provides a portable trolley, including a base assembly and a platform. 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 by hinges. Casters are connected to the bottom of the base legs. The tension spring connects the base legs and the base body.

[0005] Furthermore, the end of the tension spring furthest from the hinge is connected to the base leg to form an outer connection point, the height of which is not lower than the axis height of the hinge.

[0006] Furthermore, the other end of the tension spring is connected to the base body to form an inner end connection point, the height of which is higher than the axis height of the hinge.

[0007] Furthermore, when the base legs are in the extended state, the tension of the spring keeps the base legs in a horizontal extended state relative to the base body.

[0008] Furthermore, 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.

[0009] Furthermore, the tabletop is connected to the base body via a support rod; the size of the tabletop is 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 via threads.

[0013] Furthermore, the casters are swivel casters, and at least two of the casters are equipped with brakes.

[0014] Compared with existing technologies, the portable trolley provided by this utility model 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 with 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 the base legs from accidentally opening and swaying during transportation or storage, maintaining a compact and stable shape. 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 swaying. 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 that the large size of the trolley's base makes it difficult to place in the trunk of a small vehicle, making it inconvenient to carry and affecting customer travel. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the portable trolley provided by this utility model in use.

[0016] Figure 2 This is a three-dimensional schematic diagram of the folded state of the portable trolley provided by this utility model;

[0017] Figure 3 This is a three-dimensional schematic diagram of the base assembly provided by this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the unfolded state of the base body and base legs provided by this utility model;

[0019] Figure 5 This is a cross-sectional view of the folded structure of the base body and base legs provided by this utility model.

[0020] In the figure: 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, shaft 131, outer end connection point 141, inner end connection point 142, brake device 21. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 of the present utility model and are not intended to limit the present utility model.

[0022] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] 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 utility model, 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 utility model 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 utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Reference Figure 1-5 The image shown is a preferred embodiment of the present invention.

[0025] The portable trolley includes a base assembly 10 and a tabletop 40. The base assembly 10 includes a 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 by the hinge 13. Casters 20 are connected to the bottom of the base legs 12. The tension spring 14 connects the base legs 12 and the base body 11.

[0026] The portable trolley described above connects to the foldable and swingable base legs 12 via hinges 13, allowing the entire base assembly 10 to be folded up, significantly reducing its transport and storage volume. The folding and swinging of the base legs 12 can be achieved with a simple push-pull action, 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 transport or storage, maintaining a compact and stable position. In the unfolded state… The tension of the tension spring 14 also acts on the base support leg 12, causing it to tend to remain 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 at intervals around the base body 11 in a circumferential manner 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; it solves the problem that the large size of the trolley base makes it difficult to place in the trunk of a small vehicle, making it inconvenient to carry and affecting customer travel.

[0027] There are four base legs 12, which are symmetrically distributed around the base body 11.

[0028] There are three base legs 12, which are evenly distributed around the base body 11.

[0029] The support rod 30 can be a telescopic support rod 30 with a telescopic structure, used to reduce the overall volume of the trolley.

[0030] In this embodiment, the end of the tension spring 14 away from the hinge 13 is connected to the base support leg 12 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.

[0031] Optimized folding / unfolding mechanical properties: By positioning the end of the tension spring 14 furthest from the hinge 13 (outer connection point 141) at or above the hinge 13 axis 131, the lever arm of the tension spring 14 is optimized. During the unfolding of the base leg 12, this position helps the tension spring 14 provide a greater restoring torque, enabling the base leg 12 to automatically spring open more smoothly and reliably and reach a horizontal position, and providing stronger tension to maintain stability when approaching horizontal. During folding, this position can more effectively assist 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 keep it compact after folding.

[0032] 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.

[0033] In this embodiment, the other end of the tension spring 14 is connected to the base body 11, forming 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.

[0034] 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.

[0035] Enhanced locking in the deployed 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, and significantly enhancing the mechanical self-locking ability and overall rigidity stability in the deployed state.

[0036] 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.

[0037] In this embodiment, 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.

[0038] 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.

[0039] 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.

[0040] Enhanced rigidity: The continuous tension of the tension spring 14 keeps the base leg 12 and the base support structure taut, effectively reducing the swaying of the base leg 12 during use and improving the stability and load-bearing capacity of the table.

[0041] In this embodiment, 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.

[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 near 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 tabletop 40 is connected to the base body 11 via a support rod 30; the size of the tabletop 40 is larger than the maximum external dimensions of the folded base assembly 10.

[0046] 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.

[0047] 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".

[0048] 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.

[0049] 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.

[0050] Anti-accidental unfolding: The covering of the table panel 40 provides a certain constraint on the internal folding structure, further preventing accidental unfolding.

[0051] 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.

[0052] 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.

[0053] Safety protection: Covering the gaps can prevent users' fingers, clothing or tools from accidentally getting stuck or caught, thus improving safety.

[0054] 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.

[0055] In this embodiment, the bottom of the base body 11 is recessed inward to form a storage cavity 16 for storing the casters 20.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] Prevent scratches: Avoid the protruding casters 20 from scratching other items (such as floors, vehicle interiors, other trolleys) during storage or handling.

[0060] In this embodiment, the caster 20 is fixedly connected to the base support leg 12 by threads.

[0061] 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).

[0062] High connection strength: The threaded connection provides a very strong and reliable connection that can withstand large loads and impacts, ensuring that the caster 20 will not come loose when bearing loads, turning, or braking.

[0063] Easy to install and replace: When the caster 20 is damaged or needs to be replaced with a different specification (such as a different material, size, or with a brake), it can be quickly disassembled and installed by unscrewing the threaded fastener. It is easy to maintain and has low cost.

[0064] In this embodiment, the casters 20 are swivel casters, and at least two casters 20 are equipped with brake devices 21.

[0065] 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.

[0066] 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.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable trolley, comprising a base assembly and a platform, characterized in that: 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 by hinges. Casters are connected to the bottom of the base legs. The tension spring connects the base legs and the base body. The end of the tension spring furthest from the hinge is connected to the base leg, forming an outer connection point. The height of the outer connection point is not lower than the axis height of the hinge. The other end of the tension spring is connected to the base body, forming an inner connection point. The height of the inner connection point is higher than the axis height of the hinge. When the base legs are in the unfolded state, the tension of the spring keeps the base legs horizontally unfolded relative to the base body; when the base legs are in the folded state, the tension of the spring keeps the base legs folded relative to the base body.

2. The portable trolley as described in claim 1, characterized in that, The tabletop is connected to the base body via a support rod; the size of the tabletop is larger than the maximum external dimensions of the folded base assembly.

3. The portable trolley 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.

4. The portable trolley 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.

5. The portable trolley as described in claim 1, characterized in that, The casters are fixed to the base legs by threads.

6. The portable trolley as described in claim 5, characterized in that, The casters are swivel casters, and at least two of the casters are equipped with brakes.

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