Flat folding cart

Abstract

A flat folding cart comprises a bottom frame assembly, the bottom frame assembly comprises folding assemblies arranged on the two sides, each folding assembly comprises a first connecting device and second connecting devices arranged at the two ends of the first connecting device, connecting rod assemblies are arranged between the first connecting devices and the second connecting devices, one ends of the connecting rod assemblies are pivoted to the first connecting devices, and the other ends of the connecting rod assemblies are pivoted to the second connecting devices. The other end of the connecting rod assembly is pivoted to the second connecting device, the first connecting device is provided with a limiting part, when the connecting rod assembly is in a working state, the limiting part abuts against the connecting rod assembly to limit relative movement between the connecting rod assembly and the first connecting device, the size of the folded cart is reduced due to the arrangement of the folding assembly, and people can conveniently carry the cart to go out for use; and the structure is simple, and folding is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of trolleys, in particular to a flat-folding trolley. Background Art

[0002] The folding carts currently on the market have a single-axis structure at the bottom, which causes the front and rear columns to rotate around the single axis. Therefore, a common solution is to use a cross rod connection on the side to limit the rotation freedom of the columns to achieve the expansion and folding of the cart. This structure often leads to a large packaging size after the product is folded, which not only wastes transportation and storage costs, but also makes it inconvenient for people to carry it out. If there is no lateral cross structure, it is necessary to add another connection component at the bottom of the folding cart to achieve positioning support. The structure is more complicated, resulting in a more cumbersome folding process. Utility Model Content

[0003] In view of the shortcomings of the background technology, the purpose of the utility model is to provide a flat-folding stroller.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A foldable cart comprises a base frame assembly, wherein the base frame assembly comprises folding assemblies arranged on both sides, the folding assembly comprises a first connecting device and second connecting devices arranged at both ends of the first connecting device, a connecting rod assembly is provided between the first connecting device and each of the second connecting devices, one end of the connecting rod assembly is pivotally connected to the first connecting device, and the other end of the connecting rod assembly is pivotally connected to the second connecting device, the first connecting device is provided with a limiting portion, and when the connecting rod assembly is in a working state, the limiting portion abuts against the connecting rod assembly to limit the relative movement between the connecting rod assembly and the first connecting device.

[0006] Furthermore, the connecting rod assembly at least includes a first connecting rod and a second connecting rod which are distributed vertically and parallel to each other.

[0007] Furthermore, it also includes a plurality of connecting rods, both ends of which are respectively connected to the connecting rod assemblies located on both sides of the base frame assembly.

[0008] Furthermore, a detachable handle assembly is pivotally connected to one end of the base frame assembly, and the handle assembly includes a lower pull rod and an upper pull rod slidably adapted in the lower pull rod, and a locking portion is provided between the upper pull rod and the lower pull rod for limiting the relative movement between the upper pull rod and the lower pull rod.

[0009] Furthermore, a pull ring is provided at one end of the upper pull rod, and the lower pull rod is detachable and pivotally connected to the base frame assembly.

[0010] Furthermore, it also includes a wheel handle and a wheel body connected to the wheel handle, and at least one mounting portion is provided at the bottom of one end of the chassis assembly, and the wheel handle is detachably mounted in each mounting portion.

[0011] Furthermore, the base frame assembly is provided with four columns distributed around the base frame assembly, and each of the columns is fixedly connected to each of the second connecting devices.

[0012] Furthermore, a cross bracing pipe is provided between the two upright posts at the same end of the base frame assembly.

[0013] Furthermore, a fixing piece is provided at the top end of each of the upright posts, and each of the fixing pieces is provided with a fixing groove for fixing the scooter pocket.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model provides a foldable stroller, comprising a chassis assembly, the chassis assembly comprising folding assemblies arranged on both sides, the folding assembly comprising a first connecting device and second connecting devices arranged at both ends of the first connecting device, a connecting rod assembly is provided between the first connecting device and each second connecting device, one end of the connecting rod assembly is pivotally connected to the first connecting device, and the other end of the connecting rod assembly is pivotally connected to the second connecting device, the first connecting device is provided with a limiting portion, when the connecting rod assembly is in a working state, the limiting portion abuts against the connecting rod assembly, restricting the relative movement between the connecting rod assembly and the first connecting device, the arrangement of the folding assembly reduces the volume of the stroller after folding, which is convenient for people to carry and use outside, and the structure is simple and convenient to fold.

[0016] 2. The utility model proposes a foldable cart, in which a detachable handle assembly is pivotally connected to one end of a bottom frame assembly, and the handle assembly includes a lower pull rod and an upper pull rod slidably adapted in the lower pull rod, and a locking portion is provided between the upper pull rod and the lower pull rod for limiting the relative movement between the upper pull rod and the lower pull rod. The detachable and retractable handle assembly can further reduce the overall volume of the cart after the cart body is folded, so that it is easy to carry.

[0017] 3. The foldable cart proposed by the utility model further includes a wheel handle and a wheel body connected to the wheel handle. At least one mounting portion is provided at the bottom of one end of the chassis assembly, and a wheel handle is detachably mounted in each mounting portion. The arrangement of the detachable wheels can further reduce the overall volume of the cart after the cart body is folded, and the wheel body can be placed in the gap of the folded chassis assembly for easy carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is one of the schematic diagrams of the first embodiment of the utility model of a flat-folding stroller in the use state;

[0020] Figure 2 This is a second schematic diagram of the first embodiment of the utility model of a flat-folding stroller in use;

[0021] Figure 3 It is a schematic diagram of the folding process of the first embodiment of the flat-folding cart of the utility model;

[0022] Figure 4 This is a schematic diagram of a folding cart according to Embodiment 1 of the utility model after folding;

[0023] Figure 5 This is a schematic diagram of a first embodiment of a flat-folding cart of the utility model, which is folded and is being disassembled and stored;

[0024] Figure 6 It is a schematic diagram of a flat-folding cart of the first embodiment of the utility model after folding and disassembly and storage;

[0025] Figure 7 is a schematic diagram of a first connecting device;

[0026] Figure 8 is a schematic diagram of a second connecting device;

[0027] Fig. 9 This is a schematic diagram of a second embodiment of a flat-folding cart of the utility model in use;

[0028] Fig.10 for Fig. 9 A magnified schematic diagram of point A;

[0029] In the figure, 10, chassis assembly; 101, first connecting device; 1011, limiting part; 1012, first pivot hole; 1013, second pivot hole; 102, second connecting device; 1021, third pivot hole; 1022, fourth pivot hole; 103, connecting rod assembly; 1031, first connecting rod; 1032, second connecting rod; 104, mounting part; 20, handle assembly; 201, lower pull rod; 202, upper pull rod; 203, locking part; 204, pull ring; 205, mounting seat; 301, wheel handle; 302, wheel body; 401, column; 402, cross brace tube; 403, fixing groove. DETAILED DESCRIPTION

[0030] Combine the following Figure 1-10 The utility model is described in detail.

[0031] Embodiment 1

[0032] like Figure 1-4 , Figure 7-8 As shown, a flat-folding stroller includes a chassis assembly 10, the chassis assembly 10 includes folding assemblies arranged on both sides, the folding assembly includes a first connecting device 101 and second connecting devices 102 arranged at both ends of the first connecting device 101, a connecting rod assembly 103 is arranged between the first connecting device 101 and each second connecting device 102, one end of the connecting rod assembly 103 is pivotally connected to the first connecting device 101, and the other end of the connecting rod assembly 103 is pivotally connected to the second connecting device 102, and the first connecting device 101 is provided with a limiting portion 1011. When the connecting rod assembly 103 is in a working state, the limiting portion 1011 abuts against the connecting rod assembly 103 to limit the relative movement between the connecting rod assembly 103 and the first connecting device 101. The provision of the folding assembly reduces the volume of the stroller after folding, which is convenient for people to carry and use outside, and has a simple structure and is easy to fold.

[0033] In this embodiment, the connecting rod assembly 103 at least includes a first connecting rod 1031 and a second connecting rod 1032 that are distributed vertically and parallel to each other. Specifically, the connecting rod assembly 103 includes the first connecting rod 1031 and the second connecting rod 1032 located below the first connecting rod 1031.

[0034] Each first connecting device 101 is provided with a first pivot hole 1012 for pivoting one end of the first connecting rod 1031 and a second pivot hole 1013 for pivoting one end of the second connecting rod 1032 at both left and right ends, and the first pivot hole 1012 is arranged outwardly relative to the second pivot hole 1013; each second connecting device 102 is provided with a third pivot hole 1021 for pivoting the other end of the first connecting rod 1031 and a fourth pivot hole 1022 for pivoting the other end of the second connecting rod 1032, and the third pivot hole 1021 is arranged inwardly relative to the fourth pivot hole 1022.

[0035] In this embodiment, a plurality of connecting rods are further included, and both ends of the connecting rods are respectively connected to the connecting rod assemblies 103 located on both sides of the bottom frame assembly 10. Specifically, both ends of the connecting rods are respectively connected to the second connecting rods 1032 located on both sides of the bottom frame assembly 10. The arrangement of the connecting rods enables the folding assembly to form a placement plate in the working state, on which small items can be placed.

[0036] like Figure 1-6 As shown, in this embodiment, a detachable handle assembly 20 is pivotally connected to one end of the bottom frame assembly 10, and the handle assembly 20 includes a lower pull rod 201 and an upper pull rod 202 slidably adapted in the lower pull rod 201, and a locking portion 203 is provided between the upper pull rod 202 and the lower pull rod 201, which is used to limit the relative movement between the upper pull rod 202 and the lower pull rod 201. Specifically, the upper pull rod 202 is provided with a first clearance groove, and the first clearance groove is penetrated by the locking portion 203, and the locking portion 203 includes a locking portion and an elastic member (not shown in the figure) for driving the locking portion, and the elastic member is fixed in the upper pull rod 202, and the lower pull rod 201 is provided with a second clearance groove adapted to the first clearance groove, and at least part of the locking portion is engaged with the second clearance groove. The locking device has a simple structure. Referring to the common marble fixing structure in the prior art, this structure is the locking structure used in daily folding umbrellas. The locking part is the marble, and the elastic member is connected to the inward end of the locking part. It is easy to use. When an inward force is applied to the locking part, the marble is pressed back into the upper pull rod 202, and will not hinder the sliding between the lower pull rod 201 and the upper pull rod 202, thereby realizing the extension and retraction of the length of the handle assembly 20; this structure belongs to the prior art and will not be repeated here; other common structures in the prior art may also be used.

[0037] In this embodiment, a pull ring 204 is provided at one end of the upper pull rod 202, and the lower pull rod 201 is detachable and pivotally connected to the bottom frame assembly 10. Specifically, a mounting seat 205 is provided at the bottom of one end of the bottom frame assembly 10, and the lower pull rod 201 is detachable and pivotally connected to the mounting seat 205. This structure belongs to the prior art and will not be described here.

[0038] like Figure 1-6 As shown, in this embodiment, a wheel handle 301 and a wheel body 302 connected to the wheel handle 301 are further included. At least one mounting portion 104 is provided at the bottom of one end of the chassis assembly 10, and the wheel handle 301 is detachably mounted in each mounting portion 104. Specifically, two mounting portions 104 are provided at the bottom of each of the two ends of the chassis assembly 10, that is, a total of four mounting portions 104.

[0039] In this embodiment, the base frame assembly 10 is provided with four columns 401 distributed around the base frame assembly 10, and each column 401 is fixedly connected to each second connection device 102. Specifically, each second connection device 102 is also provided with a fixing hole, through which each column 401 is fixedly connected to each second connection device 102.

[0040] like Figure 1-6 As shown, in this embodiment, a cross bracing tube 402 is provided between two upright posts 401 located at the same end of the base frame assembly 10 .

[0041] Embodiment 2 The difference between this embodiment and embodiment 1 is that:

[0042] like Figure 9-10 As shown, in this embodiment, each column 401 has a fixing piece at the top, and each fixing piece has a fixing slot 403 for fixing the bike pocket. Through the fixing slot 403, a bike pocket can be provided at the top of each column 401, which is more convenient to use.

[0043] Except for the above contents, other contents of the second embodiment are the same as those of the first embodiment.

[0044] The working principle of the flat-folding cart proposed by the utility model is as follows:

[0045] To fold and store: Figure 3 As shown, the bottom frame assembly 10 is first folded so that the second connecting devices 102 at both ends of the bottom frame assembly 10 are close to each other to complete the folding; after completion, the length of the handle assembly 20 is adjusted by pressing the locking portion 203, and then the handle assembly 20 and each wheel are removed from the bottom frame assembly 10 to complete the storage and can be put into the package. It can also be folded without disassembly according to actual needs.

[0046] When the vehicle is to be used, the handle assembly 20 and the wheels are mounted back on the chassis assembly 10, and the chassis assembly 10 is stretched out. Alternatively, the handle assembly 20 and the wheels are mounted back on the chassis assembly 10 after the chassis assembly 10 is stretched out.

[0047] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A flat-folding cart, characterized in that: It includes a base frame assembly, which includes a folding assembly arranged on both sides, and the folding assembly includes a first connecting device and a second connecting device arranged at both ends of the first connecting device. A connecting rod assembly is provided between the first connecting device and each of the second connecting devices, one end of the connecting rod assembly is pivotally connected to the first connecting device, and the other end of the connecting rod assembly is pivotally connected to the second connecting device. The first connecting device is provided with a limiting portion, and when the connecting rod assembly is in a working state, the limiting portion abuts against the connecting rod assembly to limit the relative movement between the connecting rod assembly and the first connecting device.

2. A flat-folding stroller according to claim 1, characterized in that: The connecting rod assembly at least includes a first connecting rod and a second connecting rod which are distributed vertically and parallel to each other.

3. A flat-folding stroller according to claim 2, characterized in that: It also includes a plurality of connecting rods, both ends of which are respectively connected to the connecting rod assemblies located on both sides of the base frame assembly.

4. A flat-folding stroller according to claim 1, characterized in that: A detachable handle assembly is pivotally connected to one end of the base frame assembly. The handle assembly includes a lower pull rod and an upper pull rod slidably adapted in the lower pull rod. A locking portion is provided between the upper pull rod and the lower pull rod for limiting the relative movement between the upper pull rod and the lower pull rod.

5. A flat-folding stroller according to claim 4, characterized in that: A pull ring is provided at one end of the upper pull rod, and the lower pull rod is detachable and pivotally connected to the bottom frame assembly.

6. A flat-folding stroller according to claim 1, characterized in that: It also includes a wheel handle and a wheel body connected to the wheel handle. At least one mounting portion is provided at the bottom of one end of the chassis assembly, and the wheel handle is detachably mounted in each mounting portion.

7. A flat-folding stroller according to claim 1, characterized in that: The base frame assembly is provided with four columns distributed around the base frame assembly, and each of the columns is fixedly connected to each of the second connecting devices.

8. A flat-folding stroller according to claim 7, characterized in that: A cross bracing pipe is arranged between the two upright posts at the same end of the base frame assembly.

9. A flat-folding stroller according to claim 7, characterized in that: A fixing piece is provided at the top of each of the upright posts, and each of the fixing pieces is provided with a fixing groove for fixing the bicycle pocket.

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