Handcart folding device

Abstract

The invention belongs to the technical field of trolleys, and discloses a trolley folding device, which comprises a push rod, a folding mechanism, a folding mechanism and a folding mechanism, the tire folding mechanism can move relative to the push rod; the locking device comprises a switch, a connecting rod, a locking part and a locking surface; the locking part can be jointed with the locking surface to limit the moving position of the push rod; the switch is operably connected with the connecting rod and the locking part, the switch can be shifted between a first position and a second position, when the switch moves from the first position to the second position, the locking part is separated from the locking surface, and the push rod can move; when the switch moves from the second position to the first position, the locking part makes contact with the locking surface, the moving trend of the push rod is restrained, and by means of the structure, the folding efficiency of the trolley can be improved, and the storage size of the trolley can be reduced.

Description

Technical Field

[0001] This invention relates to the field of trolley technology, and more specifically to a folding device for a folding trolley. Background Technology

[0002] In the prior art, handcarts are a common means of transportation, typically used for carrying small items, and are frequently used as small transport tools during outdoor camping and travel. When in use, handcarts are ideally designed to unfold to maximize their carrying capacity and to fold up for easy storage when not in use. Summary of the Invention

[0003] To solve the above technical problems, a folding device for a handcart is provided. To achieve the above objectives, the technical solution adopted by this invention is as follows:

[0004] A folding device for a handcart, comprising:

[0005] The push rod is movable and has a handle;

[0006] A tire folding mechanism is movable relative to the push rod. The tire folding mechanism includes a tire, a connecting plate rotatably connected to the tire, and a limiting plate disposed at an adjacent position to the connecting plate. Through the connection of the connecting plate, the tire can move between a folded position and a used position.

[0007] The locking device includes: a switch, a linkage and a locking part, and a locking surface;

[0008] The locking portion can engage with the locking surface to restrict the movement position of the push rod;

[0009] The switch is operablely connected to the linkage and the locking part. The switch can be toggled between a first position and a second position. When the switch moves from the first position to the second position, the locking part disengages from the locking surface, and the push rod can move. When the switch moves from the second position to the first position, the locking part contacts the locking surface, and the movement tendency of the push rod is suppressed.

[0010] Furthermore, the trolley folding device also includes a limiting seat fixedly mounted on the push rod and a limiting block located at one end of the push rod. When the tire folding mechanism is in the use position, the outward and inward movement of the tire is suppressed by the limiting seat and the limiting block, respectively.

[0011] Furthermore, the tire folding mechanism also includes a first elastic element whose elastic force is operablely applied to the tire, causing the tire to tend to move toward the folding position.

[0012] Furthermore, the first elastic element is constructed as a torsion spring.

[0013] Furthermore, the locking portion is constructed as a locking pin, and the surface is constructed as a limiting hole.

[0014] Furthermore, the linkage has a pair, and at least a portion of the switch is located between the pair of linkages.

[0015] Furthermore, the locking mechanism also includes a second elastic element, the elastic force of which can be applied to the locking portion, causing the locking portion to tend to move in the direction of contact with the locking surface.

[0016] Furthermore, the second elastic element is constructed as a compression spring and is sleeved on the connecting rod.

[0017] Furthermore, the locking mechanism also includes a housing that can cover at least a portion of the linkage and the switch.

[0018] Furthermore, the push rod also includes a hollow connecting rod, and the handle is movably sleeved in the connecting rod.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: by improving the existing push rod, tire folding mechanism and locking mechanism, the present invention can improve the folding efficiency of the trolley and reduce the storage volume of the trolley. Attached Figure Description

[0020] Figure 1 This is a first-view structural schematic diagram of the folding device for a handcart according to the present invention;

[0021] Figure 2 This is a second-view structural schematic diagram of the folding device for a handcart according to the present invention;

[0022] Figure 3 This is a third-view structural diagram of the folding device for a handcart according to the present invention;

[0023] Figure 4 This is a first exploded structural diagram of the folding device for a handcart according to the present invention;

[0024] Figure 5 This is a second exploded view of the folding device for a handcart according to the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and technical effects of the embodiments of the present invention clearer, the technical solutions of the processing box of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely preferred embodiments of the present invention, and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the protection scope of the present invention.

[0026] like Figures 1 to 5 As shown, an embodiment of this application discloses a trolley folding device, including a push rod 1, a tire folding mechanism, and a locking mechanism. The push rod 1 can be gripped by the operator, thereby facilitating the operator to move the trolley 100. The tire folding mechanism can be used to fold the tire 3. The locking mechanism can be used to lock / unlock the push rod 1, thereby facilitating the movement and folding of the push rod 1. The above structure will be described in detail below.

[0027] Furthermore, the push rod 1 has a handle 1a at the top and a connecting rod 1b located below the handle 1a and operablely connected to the handle 1a. The handle 1a is telescopically installed in the inner cavity of the hollow connecting rod 1b. The two can be connected by, for example, multiple elastic posts arranged vertically along the connecting rod 1b. The operator can press the elastic posts with one hand to release the lock between the handle and the connecting rod 1b, and press the handle 1a with the other hand towards the connecting rod 1b, so that at least a part of the handle 1a is further inserted into the inner cavity of the connecting rod 1b until it is adjusted to a suitable position. Then the elastic posts can be released, and the locking connection between the handle 1a and the connecting rod 1b is completed. Therefore, through the telescopic handle structure designed above, it can be flexibly adjusted according to the height differences of different operators, thereby effectively adapting to users of various heights, significantly improving the ergonomics and operational comfort of the trolley 100, and further enhancing the overall compatibility and practicality of the product.

[0028] Furthermore, the trolley 100 also includes a tire folding mechanism with a tire 3 located on the bottom side of the push rod 1. The tire folding mechanism is located on the left and right sides of the trolley 100. When the trolley 100 is not in use, the folding mechanism can further reduce the volume occupied by the trolley 100, making it easier to transport and store the trolley. Specifically, the tire folding mechanism includes not only the aforementioned tire 3, but also a connecting plate 17 for rotatably connecting the tire 3, a limiting plate 13 for fixing the connecting plate 17, and a limiting seat 4 adjacent to the limiting plate 13. The limiting seat 4 is fixedly connected to the push rod 1. The upper part can move together with the push rod 1; when the locking mechanism keeps the push rod 1 unlocked, when an external force is applied to the tire folding mechanism, the tire 3 drives the connecting plate 17 and the limiting plate 13 to rotate inward relative to the limiting seat 14, that is, the tires 3 located on the left and right sides can move closer to each other. When the trolley 100 is placed in a flat position (that is, when the handle 1a and the connecting rod 1b of the push rod 1 are roughly on the same plane and are parallel to the support surface), the side of the tire 3, that is, the non-rolling surface of the tire 3, is roughly parallel to the support surface, which can further reduce the volume of the folded trolley 100; such as Figure 4-5 As shown, when the folded trolley 100 needs to be reused, an outward force is applied to the tire folding mechanism. The tire 3 drives the connecting plate 17 and the limiting plate 13 to rotate outward together until the limiting surface 13a of the limiting plate 13 contacts the limiting seat 4, thus suppressing the outward rotation tendency of the tire folding mechanism. At this time, the tire folding mechanism can no longer rotate outward and is in a rolling position where the tire can be used normally. At the same time, the push rod 1 is rotated upward until it moves to a position where the limiting block 18 is limited and stops. In this position, as... Figure 2As shown, the limiting block 18 can abut against the inner side of the limiting plate 13 of the tire folding mechanism, thereby suppressing the inward rotation tendency of the tire folding mechanism. That is, the outward rotation tendency of the tire folding mechanism is limited by the limiting seat 4, and the inward rotation tendency is limited by the limiting block 18. The two limiting structures can ensure that the tire folding mechanism is in the correct position and ensure the rolling stability of the tire 3 during the rolling process. Furthermore, in order to improve the folding efficiency and maintain the tire 3 in a stable folding position, the tire folding mechanism also includes a first elastic element 11. The first elastic element 11 is constructed as a torsion spring and is installed on the support column 10. One end of the first elastic element 11 can abut against the tire. On the connecting plate 17 or the limiting plate 13, when the tire opens outward, the movement of the tire 3 needs to overcome the elastic force of the first elastic element 11. When the tire 3 folds inward and the push rod 1 is unlocked, the elastic force stored in the first elastic element 11 is released and applied to the tire 3, the connecting plate 17, and the limiting plate 13, causing the tire 3, the connecting plate 17, and the limiting plate 13 to rotate inward together, ultimately keeping the tire 3, the connecting plate 17, and the limiting plate 13 in a stable folded position. Since the push rod 1 is a movable structure, it is particularly important to ensure the position of the push rod 1 during use. Next, the locking mechanism used to lock the position of the push rod 1 will be described in detail.

[0029] The locking mechanism is located between the left and right walls of the handcart 100. The locking mechanism includes a switch 2, a first housing 5, a second housing 6, a connecting rod 7, a second elastic element 8, a locking pin 7a (locking part), and a fixing plate 15. The first housing 5 covers at least a portion of the switch 2, and the second housing 6 covers at least a portion of the connecting rod 7. Both protect the switch 2 and the connecting rod 7 respectively, preventing damage from accidental collisions and improving the aesthetics of the handcart. The locking mechanism has a pair of connecting rods 7 arranged horizontally. In the left-right direction, the switch 2 is located between the pair of connecting rods 7; in other words, in the left-right direction, the switch 2 is approximately in the middle position of the locking mechanism. The switch 2 is operablely connected to the connecting rods 7. By toggling the switch 2 in the first position, the switch 2 can be pulled... The moving link 7 disengages the locking pins 7a at both ends from the limiting holes 15a of the corresponding fixed plate 15. That is, the left and right ends of the locking pins 7a move inward against the elastic force of the second elastic element 8, which is a compression spring. Finally, the locking pins 7a are pulled out of the limiting holes 15a, unlocking the push rod 1. The push rod 1 can then be moved to a folded state. Optionally, the limiting hole 15a can be constructed as a groove or a surface; this is not limited, as long as the limiting function is achieved. This application uses a preferred embodiment. When the trolley 100 needs to be used again, the push rod 1, which is in the folded state, is moved to a normal operating position. Finally, the switch 2, which is in the second position, can be toggled in the opposite direction. The connecting rod 7 and the locking pin 7a are moved outward. During this process, the elastic force stored in the second elastic element 8 sleeved on the connecting rod 7 is released, and the elastic force is applied to the connecting rod 7 and the locking pin 7a, forcing them to move outward. As the locking pin 7a is inserted into the limiting hole 15a of the fixing plate 15, the locking of the push rod 1 is completed. At that time, the push rod 1 can be used normally.

[0030] In summary, compared with the prior art, the beneficial effects of the present invention are as follows: by improving the existing push rod, tire folding mechanism and locking mechanism, the present invention can improve the folding efficiency of the trolley and reduce the storage volume of the trolley.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A folding device for a handcart, characterized in that, include: The push rod is movable and has a handle; A tire folding mechanism is movable relative to the push rod. The tire folding mechanism includes a tire, a connecting plate rotatably connected to the tire, and a limiting plate disposed at an adjacent position to the connecting plate. Through the connection of the connecting plate, the tire can move between a folded position and a used position. The locking device includes: a switch, a linkage and a locking part, and a locking surface; The locking portion can contact the locking surface to restrict the movement position of the push rod; The switch is operablely connected to the linkage and the locking part. The switch can be toggled between a first position and a second position. When the switch moves from the first position to the second position, the locking part disengages from the locking surface, and the push rod can move. When the switch moves from the second position to the first position, the locking part contacts the locking surface, and the movement tendency of the push rod is suppressed.

2. The folding device for a handcart according to claim 1, characterized in that, The trolley folding device also includes a limiting seat fixedly mounted on the push rod and a limiting block located at one end of the push rod. When the tire folding mechanism is in the use position, the outward and inward movement of the tire is suppressed by the limiting seat and the limiting block, respectively.

3. The folding device for a handcart according to claim 1, characterized in that, The tire folding mechanism further includes a first elastic element whose elastic force is operablely applied to the tire, causing the tire to tend to move toward the folding position.

4. The folding device for a handcart according to claim 3, characterized in that, The first elastic element is constructed as a torsion spring.

5. The folding device for a handcart according to claim 1, characterized in that, The locking part is constructed as a locking pin, and the surface is constructed as a limiting hole.

6. The folding device for a handcart according to claim 1, characterized in that, The linkage has a pair, and at least a portion of the switch is located between the pair of linkages.

7. The folding device for a handcart according to claim 1, characterized in that, The locking mechanism further includes a second elastic element, the elastic force of which can be applied to the locking portion, causing the locking portion to tend to move in the direction of contact with the locking surface.

8. The folding device for a handcart according to claim 7, characterized in that, The second elastic element is constructed as a compression spring and is sleeved on the connecting rod.

9. The folding device for a handcart according to claim 1, characterized in that, The locking mechanism also includes a housing that covers at least a portion of the linkage and the switch.

10. The folding device for a handcart according to claim 1, characterized in that, The push rod also includes a hollow connecting rod, and the handle is movably sleeved in the connecting rod.

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