Folding low carry cart

Abstract

To provide a carry cart having a small occupied space and convenient for carrying and transportation.SOLUTION: When the foldable low-profile carrier cart is folded, the side folding mechanism 2 drives the telescopic column 1 connected thereto to be shortened, and when the foldable low-profile carrier cart is unfolded, the side folding mechanism 2 drives the telescopic column 1 connected thereto to be extended, so that the height of the foldable low-profile carrier cart in the folded state is less than that in the unfolded state. In the present invention, the telescopic column 1 is provided, and during the folding or unfolding of the carrying cart, the telescopic column 1 is shortened or lengthened by the folding mechanism, so that the space of the cloth bag mounted on the top of the telescopic column 1 is increased after the unfolding of the folding low-back carrying cart. In addition, after the foldable low-back carrying cart is folded, the telescopic column 1 is shortened, and the occupied space is reduced, which is convenient for carrying and transportation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to the technical field of folding carry carts, and more particularly to a folding low profile carry cart. [Background technology]

[0002] In daily life and production, it is often necessary to transport luggage and other items, and carry carts are often used for this purpose. Carry carts are easy to push and require little effort, making them widely used for transporting items. Carry carts are designed with a foldable structure for easy storage, are very lightweight, and can be placed in a car after folding, making them convenient to carry.

[0003] However, conventional folding carry carts have a small volume when unfolded and can only store a small number of items, but a large volume when folded and occupy a large space, which is particularly inconvenient when folded and stored in a space-limited place such as a car trunk, and negatively affects user usability.

[0004] Conventional folding carts have structural limitations in the folding mechanism itself, resulting in a significantly higher folded height than the unfolded height of the cart, resulting in a large storage footprint. However, simply reducing the storage footprint inevitably comes at the expense of the unfolded volume of the cart. Therefore, the mutual constraints between the unfolded volume and the storage footprint of the cart are a difficult problem for those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE INVENTION In view of the above drawbacks and shortcomings of the prior art, the present invention provides a folding, low-profile carry cart that solves the problem of a small volume in the unfolded state and a large volume in the folded state. [Means for solving the problem]

[0006] In order to achieve the above object, the folding low-profile carry cart of the present invention includes four telescopic pillars spaced apart to form a rectangle, and at least two side folding mechanisms arranged opposite each other, each of which has both ends hingedly connected to two adjacent telescopic pillars, When the folding low-back carrier cart is folded, the side folding mechanism drives the telescopic pillar connected thereto to shorten, and when the folding low-back carrier cart is unfolded, the side folding mechanism drives the telescopic pillar connected thereto to extend, so that the height of the folding low-back carrier cart in the folded state is smaller than the height of the unfolded state.

[0007] the telescoping pillar includes a lifting rod; The top of the lifting rod is the top of the telescopic pillar, and both ends of the side folding mechanism are provided with interlocking ends that are hingedly connected to the corresponding lifting rod of the telescopic pillar; During the folding of the folding low-profile carrying cart, the length of the side folding mechanism is shortened, and the linking end moves the lifting rod downward; When the folding low-profile carrying cart is unfolded, the length of the side folding mechanism increases, and the linking end moves the lifting rod upward; The height of the side folding mechanism after folding may be configured to be lower than the height of the telescopic pillar.

[0008] The telescopic pillar further includes a fixed vertical rod; The lifting rod slides vertically relative to the fixed vertical rod, The side folding mechanism further includes fixed ends at both ends, and the fixed ends are hingedly connected to the fixed vertical rods of the corresponding telescopic pillars; The fixed end may be configured to rotate on its own axis while the side folding mechanism is being folded or unfolded, and the interlocking end may be configured to move the lifting rod along the fixed vertical rod.

[0009] An interlocking slide sleeve is slidably provided on the fixed vertical rod, The lifting rod is connected to the interlocking slide sleeve, and the interlocking end is hingedly connected to the interlocking slide sleeve; A top fixing part is provided on the top of the fixed vertical rod, and the fixed end is hingedly connected to the top fixing part; During folding of the folding low-profile carrying cart, the interlocking end hingedly connected to the interlocking slide sleeve causes the lifting rod to move downward via the interlocking slide sleeve; When the folding low-profile carry cart is unfolded, the linking end hingedly connected to the linking slide sleeve may be configured to move the lifting rod upward via the linking slide sleeve.

[0010] The lifting rod is located outside the fixed vertical rod, and the lifting rod is slidably connected to the top fixed part, and the top fixed part restricts the horizontal position of the lifting rod during the up and down movement of the lifting rod; Alternatively, the fixed vertical rod may have a hollow structure, the lifting rod may be slidably inserted into the fixed vertical rod, the interlocking slide sleeve may be slidably inserted onto the fixed vertical rod, a vertically elongated strip-shaped hole may be provided in the fixed vertical rod, the lifting rod may be connected to the interlocking slide sleeve via a connecting part, and the horizontal position of the lifting rod may be restricted by the fixed vertical rod during the up and down movement of the lifting rod.

[0011] The folding low-profile carry cart may have four side folding mechanisms located on the front, rear, left side, and right side, and the structure of the side folding mechanisms located on the left and right sides may be structure 1 or structure 2, and the structure of the side folding mechanisms located on the front and rear sides may be structure 1.

[0012] The structure 1 is as follows: The structure 1 includes a plurality of X-shaped rod groups that are hingedly connected in series, and the X-shaped rod groups include a first link and a second link that are hingedly connected to each other at a central portion; In the side folding mechanism, a first end of a first link of the X-shaped rod group located at the tip constitutes the fixed end, and a first end of a second link constitutes the interlocking end, a first end of a first link of the X-shaped rod group located at the rear end constitutes the fixed end, and a first end of a second link of the X-shaped rod group constitutes the interlocking end; In the same X-shaped rod group, the first end of the first link and the first end of the second link are located on the same side.

[0013] The structure 2 is as follows: The structure 2 includes a first fork rod and a second fork rod located at one end, a third fork rod and a fourth fork rod located at the other end, and a T-shaped folding assembly located at the center, The first fork rod and the second fork rod are hingedly connected at their central portions, and the third fork rod and the fourth fork rod are hingedly connected at their central portions, a first end of the first fork rod constitutes the fixed end, a first end of the second fork rod constitutes the interlocking end, and the first ends of the first fork rod and the second fork rod are located on the same side; a first end of the third fork rod constitutes the fixed end, a first end of the fourth fork rod constitutes the interlocking end, and the first ends of the third fork rod and the fourth fork rod are located on the same side; the T-shaped folding assembly includes a fifth fork rod, a sixth fork rod, and a seventh fork rod; a first end of the fifth fork rod and a second end of the second fork rod are hingedly connected, and a first end of the sixth fork rod and a second end of the fourth fork rod are hingedly connected, a second end of the fifth fork rod and a second end of the sixth fork rod are hingedly connected to each other; A first end of the seventh fork rod is connected to a hinge connection point between the fifth fork rod and the sixth fork rod, and second ends of the first fork rod and the third fork rod are hinge-connected to the second end of the seventh fork rod. In Structure 1 and Structure 2, when the folding low-back carrier cart is folded, the fixed end and the interlocking end located on the same side move away from each other, and when the folding low-back carrier cart is unfolded, the fixed end and the interlocking end located on the same side move close to each other.

[0014] The adjacent fixed ends of two adjacent side folding mechanisms may be connected to the same top fixed component, and the adjacent interlocking ends of two adjacent side folding mechanisms may be connected to the same interlocking slide sleeve.

[0015] The folding low-profile carry cart further includes a bottom support mechanism, the bottom support mechanism being hingedly connected between the four telescopic pillars, and a pair of the side folding mechanisms provided opposite each other are respectively connected to the bottom support mechanism via a first connection assembly and a second connection assembly, the bottom support mechanism being foldable, contracted and gathered together, and having a height after folding that is lower than the height of the telescopic pillars; The folding low-profile carry cart further includes a handle mechanism, the handle mechanism including a telescopic rod, a first horizontal rod, and a second horizontal rod, a first end of each of the first horizontal rod and the second horizontal rod being hingedly connected to the telescopic rod, and a second end of each of the first horizontal rod and the second horizontal rod being connected to a lower end of each of the two adjacent telescopic pillars in a one-to-one correspondence so as to be rotatable at a finite angle, the telescopic rod being extendable and retractable, and a height of the telescopic rod in a retracted state being lower than a height of the telescopic pillars, A roller may be provided at the lower end of each of the four telescopic pillars, and at least one pair of the rollers may be configured as a swivel.

[0016] The bottom support mechanism includes a first bottom connection part and a second bottom connection part, the first connection assembly is provided with a third bottom connection part, and the second connection assembly is provided with a fourth bottom connection part; The first bottom connecting part is connected to the lower ends of the two adjacent telescopic pillars via the first bottom link so as to be rotatable at a finite angle; The second bottom connecting part is connected to the lower ends of the other two adjacent telescopic pillars via a second bottom link so as to be rotatable at a finite angle; The first bottom connecting part is connected to the third bottom connecting part and the fourth bottom connecting part via a third bottom link so as to be rotatable at a finite angle; The second bottom connecting part is connected to the third bottom connecting part and the fourth bottom connecting part via a fourth bottom link so as to be rotatable at a finite angle; When the folding low-profile carrying cart is in a folded state, the heights of the first bottom connecting part and the second bottom connecting part may be configured to be lower than the height of the telescopic pillar.

[0017] The four telescopic pillars may be configured so that their respective tips can be connected to the four corners of the cloth bag of the foldable low-profile carry cart in one-to-one correspondence.

[0018] When the folding low-profile carry cart is being folded, the side folding mechanism drives the telescopic pillars connected thereto to shorten, causing the telescopic pillars to automatically contract and lower, and when it is being unfolded, the side folding mechanism drives the telescopic pillars connected thereto to extend, causing the telescopic pillars to automatically extend, making it easy to operate and convenient for users. The telescopic pillars allow the volume of the cart to be changed between when it is unfolded and when it is folded. When unfolded, the telescopic pillars extend, increasing the height of the cart after unfolding and thus increasing the internal volume of the cart. When folded, the telescopic pillars shorten, reducing the overall height of the folding low-profile cart and thus reducing the space occupied by the cart. This makes it convenient to carry and transport. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view showing a structure 1 of a folding low-profile carry cart according to the present invention. [Figure 2] 1 is a perspective view showing a structure 2 of a folding low-profile carry cart according to the present invention. [Figure 3] 1 is a schematic diagram showing the connection of a side folding mechanism of a folding low-profile carry cart according to a first embodiment of the present invention. FIG. [Figure 4] 1 is a schematic diagram showing the configuration of an extendable pillar of a folding low-profile carry cart according to a first embodiment of the present invention. FIG. [Figure 5] FIG. 10 is a schematic diagram showing the configuration of an extendable pillar of a folding low-profile carry cart according to a second embodiment of the present invention. [Figure 6] 1 is a side view of a folding low-profile carry cart according to a first embodiment of the present invention. [Figure 7] FIG. 10 is a side view of a folding low-profile carry cart according to a second embodiment of the present invention. [Figure 8] 1 is a front view of a folding low-profile carry cart according to a first embodiment of the present invention. [Figure 9] FIG. 10 is a front view of a folding low-profile carry cart according to a second embodiment of the present invention. [Figure 10] 1 is a side view of a folding low-profile carry cart structure 2 according to the present invention. [Figure 11] 1 is a top view of a folding, low-profile carry cart according to the present invention; FIG. [Figure 12] 1 is a schematic diagram showing a half-folded state of the folding low-profile carrying cart according to the present invention; FIG. [Figure 13] 1 is a schematic diagram showing a folded state of a folding low-profile carry cart according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to better explain and make the present invention easier to understand, the present invention will be described in detail below through specific embodiments with reference to the drawings.

[0021] While the drawings depict exemplary embodiments of the present invention, it will be understood that the present invention may be embodied in various forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided to more clearly and fully understand the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0022] As shown in FIGS. 1 and 2, the present invention provides a folding, low-profile carry cart whose folded height is smaller than its unfolded height.

[0023] As shown in Figures 1 to 3, the folding low-back carry cart includes four telescopic pillars 1 spaced apart to form a rectangle, and at least two opposing side folding mechanisms 2. The side folding mechanisms 2 of the folding low-back carry cart come in three forms: a first form in which one side folding mechanism 2 is provided on the left and right sides; a second form in which one side folding mechanism 2 is provided on the front and rear sides; and a third form in which one side folding mechanism 2 is provided on the front, rear, left, and right sides. For ease of explanation, the left side folding mechanism 2 is defined as the first folding mechanism 21, the right side folding mechanism 2 as the second folding mechanism 22, the front side folding mechanism 2 as the third folding mechanism 23, and the rear side folding mechanism 2 as the fourth folding mechanism 24. The first folding mechanism 21 and the second folding mechanism 22 are two opposing side folding mechanisms 2, and the third folding mechanism 23 and the fourth folding mechanism 24 are two opposing side folding mechanisms 2. The four telescopic pillars 1 spaced apart to form a rectangle are the first telescopic pillar 11, the second telescopic pillar 12, the third telescopic pillar 13, and the fourth telescopic pillar 14, respectively. When the side folding mechanism 2 is in the first configuration, the first folding mechanism 21 is hingedly connected between the first telescopic pillar 11 and the second telescopic pillar 12, and the second folding mechanism 22 is hingedly connected between the third telescopic pillar 13 and the fourth telescopic pillar 14. When the side folding mechanism 2 is in the second configuration, the third folding mechanism 23 is hingedly connected between the first telescopic pillar 11 and the fourth telescopic pillar 14, and the fourth folding mechanism 24 is hingedly connected between the second telescopic pillar 12 and the third telescopic pillar 13. When the side folding mechanism 2 is in the third configuration, the connection configurations of the four side folding mechanisms 2 include the connection configuration in the first configuration and the connection configuration in the second configuration.

[0024] As shown in Figures 12 and 13, when the folding low-back carry cart is being folded, the side folding mechanism 2 drives the telescopic pillar 1 connected thereto to shorten. That is, the first folding mechanism 21 and the third folding mechanism 23 drive the first telescopic pillar 11 to shorten so that its tip is lowered, the first folding mechanism 21 and the fourth folding mechanism 24 drive the second telescopic pillar 12 to shorten so that its tip is lowered, the second folding mechanism 22 and the third folding mechanism 23 drive the fourth telescopic pillar 14 to shorten so that its tip is lowered, and the second folding mechanism 22 and the fourth folding mechanism 24 drive the third telescopic pillar 13 to shorten so that its tip is lowered, so that the telescopic pillars 1 automatically shorten during folding. This simplifies operation and provides user convenience. On the other hand, when the folding low-back carry cart is unfolded, the side folding mechanism 2 extends the connected telescopic pillar 1 so that its tip becomes higher. That is, the first folding mechanism 21 and the third folding mechanism 23 extend the first telescopic pillar 11 so that its tip becomes higher, the first folding mechanism 21 and the fourth folding mechanism 24 extend the second telescopic pillar 12 so that its tip becomes higher, the second folding mechanism 22 and the third folding mechanism 23 extend the fourth telescopic pillar 14 so that its tip becomes higher, and the second folding mechanism 22 and the fourth folding mechanism 24 extend the third telescopic pillar 13 so that its tip becomes higher. Thus, the telescopic pillar 1 automatically extends and its tip becomes higher during unfolding. This simplifies operation and is user-friendly. The provision of the telescopic pillar 1 allows the volume of the carry cart to be changed between unfolded and folded. When unfolded, the telescopic pillar 1 extends and its tip becomes higher, increasing the height of the unfolded carry cart and thus increasing the internal volume of the carry cart.When folded, the telescopic pillar 1 shortens and its tip becomes lower, reducing the overall height of the folding low-back carry cart and thus reducing the space occupied by the carry cart, making it convenient to carry and transport.

[0025] Furthermore, as shown in Figures 3 to 5, the first telescopic pillar 11 includes a first lifting rod 111, the second telescopic pillar 12 includes a second lifting rod 121, the third telescopic pillar 13 includes a third lifting rod 131, and the fourth telescopic pillar 14 includes a fourth lifting rod 141, and the top of each lifting rod is the top of each telescopic pillar 1. 4 , the first folding mechanism 21 has interlocking ends 201 at both ends thereof that are hingedly connected to the first lifting rod 111 and the second lifting rod 121, the second folding mechanism 22 has interlocking ends 201 at both ends thereof that are hingedly connected to the third lifting rod 131 and the fourth lifting rod 141, the third folding mechanism 23 has interlocking ends 201 at both ends thereof that are hingedly connected to the first lifting rod 111 and the fourth lifting rod 141, and the fourth folding mechanism 24 has interlocking ends 201 at both ends thereof that are hingedly connected to the second lifting rod 121 and the third lifting rod 131. When the low-back folding trolley is being folded, the horizontal length of each side folding mechanism 2 is shortened, and the interlocking ends 201 at both ends of each side folding mechanism 2 cause the corresponding lifting rod to automatically move downward, and each telescopic pillar 1 is automatically retracted and lowered. When the folding low-back carrier cart is unfolded, the horizontal length of each side folding mechanism 2 increases, and the interlocking ends 201 at both ends of each side folding mechanism 2 automatically move the corresponding lifting rods upward, causing each telescopic pillar 1 to automatically extend and its tip to become higher. Furthermore, the height of each side folding mechanism 2 after folding is lower than the height of the telescopic pillar 1 that has shortened and its tip has become lower.

[0026] 3 to 5, the first telescopic pillar 11 further includes a first fixed vertical rod 112, the second telescopic pillar 12 further includes a second fixed vertical rod 122, the third telescopic pillar 13 further includes a third fixed vertical rod 132, and the fourth telescopic pillar 14 further includes a fourth fixed vertical rod 142. The first lifting rod 111 slides vertically relative to the first fixed vertical rod 112, the second lifting rod 121 slides vertically relative to the second fixed vertical rod 122, the third lifting rod 131 slides vertically relative to the third fixed vertical rod 132, and the fourth lifting rod 141 slides vertically relative to the fourth fixed vertical rod 142. At both ends of the first folding mechanism 21, fixed ends 202 are provided that are hingedly connected to the first fixed vertical rod 112 and the second fixed vertical rod 122, at both ends of the second folding mechanism 22, fixed ends 202 are provided that are hingedly connected to the third fixed vertical rod 132 and the fourth fixed vertical rod 142, at both ends of the third folding mechanism 23, fixed ends 202 are provided that are hingedly connected to the first fixed vertical rod 112 and the fourth fixed vertical rod 142, and at both ends of the fourth folding mechanism 24, fixed ends 202 are provided that are hingedly connected to the second fixed vertical rod 122 and the third fixed vertical rod 132. When each side folding mechanism 2 is being folded or unfolded, each fixed end 202 rotates around the hinge axis connected to the corresponding fixed vertical rod, so that the fixed end 202 does not move up and down, and each interlocking end 201 moves each lifting rod connected to it by a hinge in the longitudinal direction of the fixed vertical rod, i.e., vertically.

[0027] 3 to 5, an interlocking slide sleeve 15 is slidably provided on each of the first fixed vertical rod 112, the second fixed vertical rod 122, the third fixed vertical rod 132, and the fourth fixed vertical rod 142. The first lifting rod 111, the second lifting rod 121, the third lifting rod 131, and the fourth lifting rod 141 are connected to the interlocking slide sleeves 15 provided on the first fixed vertical rod 112, the second fixed vertical rod 122, the third fixed vertical rod 132, and the fourth fixed vertical rod 142 in a one-to-one correspondence, respectively. The interlocking ends 201 at both ends of the first folding mechanism 21 are hingedly connected to the interlocking slide sleeves 15 provided on the first fixed vertical rod 112 and the second fixed vertical rod 122, the interlocking ends 201 at both ends of the second folding mechanism 22 are hingedly connected to the interlocking slide sleeves 15 provided on the third fixed vertical rod 132 and the fourth fixed vertical rod 142, the interlocking ends 201 at both ends of the third folding mechanism 23 are hingedly connected to the interlocking slide sleeves 15 provided on the first fixed vertical rod 112 and the fourth fixed vertical rod 142, and the interlocking ends 201 at both ends of the fourth folding mechanism 24 are hingedly connected to the interlocking slide sleeves 15 provided on the second fixed vertical rod 122 and the third fixed vertical rod 132, respectively. The first fixed vertical rod 112, the second fixed vertical rod 122, the third fixed vertical rod 132, and the fourth fixed vertical rod 142 each have a top fixed component 16 at the top thereof. The fixed ends 202 at both ends of the first folding mechanism 21 are hingedly connected to the top fixed parts 16 provided on the first fixed vertical rod 112 and the second fixed vertical rod 122, the fixed ends 202 at both ends of the second folding mechanism 22 are hingedly connected to the top fixed parts 16 provided on the third fixed vertical rod 132 and the fourth fixed vertical rod 142, the fixed ends 202 at both ends of the third folding mechanism 23 are hingedly connected to the top fixed parts 16 provided on the first fixed vertical rod 112 and the fourth fixed vertical rod 142, and the fixed ends 202 at both ends of the fourth folding mechanism 24 are hingedly connected to the top fixed parts 16 provided on the second fixed vertical rod 122 and the third fixed vertical rod 132, respectively. During folding of the folding low-back carry cart, the lifting rod is moved downward via the interlocking slide sleeve 15 by the interlocking end 201 hingedly connected to the interlocking slide sleeve 15.When the folding low-back carry cart is unfolded, the lifting rod is moved upward via the interlocking slide sleeve 15 by the interlocking end 201 which is hingedly connected to the interlocking slide sleeve 15.

[0028] The configurations of the first telescopic pillar 11, the second telescopic pillar 12, the third telescopic pillar 13, and the fourth telescopic pillar 14 will be described below in two examples. (Example 1) The first telescopic pillar 11 will be described as an example with reference to FIG. 5 . The first lifting rod 111 is located outside the first fixed vertical rod 112. A through-hole whose central axis is parallel to that of the first fixed vertical rod 112 is provided in the top fixing component 16 provided on the first fixed vertical rod 112. The first lifting rod 111 is inserted into the through-hole so that the first lifting rod 111 is slidably connected to the top fixing component 16 provided on the first fixed vertical rod 112. During the up and down movement of the first lifting rod 111, the horizontal position of the first lifting rod 111 is restricted by the top fixing component 16 provided on the first fixed vertical rod 112. This allows the first lifting rod 111 to move only in the direction of the central axis of the through-hole. The configurations of the second telescopic pillar 12, the third telescopic pillar 13, and the fourth telescopic pillar 14 are similar to that of the first telescopic pillar 11, and therefore will not be described here. (Example 2) The first telescopic pillar 11 will be described as an example with reference to Figure 4. The first fixed vertical rod 112 has a hollow structure, and the first lifting rod 111 is slidably inserted into the first fixed vertical rod 112, and the first fixed vertical rod 112 is slidably inserted into an interlocking slide sleeve 15 provided on the first fixed vertical rod 112. A longitudinal strip-shaped hole 17 is provided in the first fixed vertical rod 112, and the first lifting rod 111 is connected to the interlocking slide sleeve 15 provided on the first fixed vertical rod 112 via a connecting part. The connecting part includes rivets, bolts, etc., but is not limited thereto as long as it can detachably connect the first lifting rod 111 to the interlocking slide sleeve 15 provided on the first fixed vertical rod 112 via the strip-shaped hole 17. While the first lifting rod 111 is moving up and down, the horizontal position of the first fixed vertical rod 112 is restricted by the first lifting rod 111, so that the first lifting rod 111 can only move in the direction of the central axis of the first fixed vertical rod 112. The configurations of the second telescopic pillar 12, the third telescopic pillar 13, and the fourth telescopic pillar 14 are similar to that of the first telescopic pillar 11, and therefore will not be described here.

[0029] The structure of the side folding mechanisms 2 located on the left and right sides may be Structure 1 or Structure 2, and the structure of the side folding mechanisms 2 located on the front and rear sides is Structure 1. A specific description will be given below.

[0030] Structure 1: As shown in FIGS. 4 to 9 , the side folding mechanism 2 in the structure 1 includes a plurality of X-shaped rod groups hingedly connected in sequence. The X-shaped rod groups include a first link 2111 and a second link 2112 hingedly connected at their centers. The hinge connection point does not necessarily have to be located at the center point between the first link 2111 and the second link 2112, and may be shifted from the center point as necessary. In the first folding mechanism 21, the second folding mechanism 22, the third folding mechanism 23, and the fourth folding mechanism 24, a first end of the first link 2111 of the X-shaped rod group located at the front end constitutes the fixed end 202, and a first end of the second link 2112 of the X-shaped rod group located at the front end constitutes the interlocking end 201. A first end of the first link 2111 of the X-shaped rod group located at the rear end constitutes the fixed end 202, and a first end of the second link 2112 of the X-shaped rod group located at the rear end constitutes the interlocking end 201. Furthermore, in the same X-shaped rod group, the first end of the first link 2111 and the first end of the second link 2112 are located on the same side. Furthermore, the adjacent fixed ends 202 of two adjacent side folding mechanisms 2 are connected to the same top fixed part 16, and the adjacent interlocking ends 201 of two adjacent side folding mechanisms 2 are connected to the same interlocking slide sleeve 15.

[0031] In a preferred embodiment, the first folding mechanism 21 and the second folding mechanism 22 each include three X-shaped rod groups: a first X-shaped rod group 211, a second X-shaped rod group 212, and a third X-shaped rod group 213, which are hingedly connected in sequence. Among them, the first X-shaped rod group 211 is the X-shaped rod group located at the front end, the third X-shaped rod group 213 is the X-shaped rod group located at the rear end, and the second X-shaped rod group 212 is located between the first X-shaped rod group 211 and the third X-shaped rod group 213. The second X-shaped rod group 212 includes a third link 2121 and a fourth link 2122, whose rod bodies are hingedly connected to each other. First ends of the first links 2111 of the first X-shaped rod group 211 and the third X-shaped rod group 213 both constitute the fixed end 202. The first ends of the second links 2112 of the first X-shaped rod group 211 and the third X-shaped rod group 213 both constitute the interlocking end 201. The first folding mechanism 21 and the second folding mechanism 22 have the same configuration and are positioned symmetrically. A specific description will be given with reference to an illustrated example of the first folding mechanism 21. As shown in FIGS. 6 and 7, in the first folding mechanism 21, the first end of the first link 2111 of the first X-shaped rod group 211 is hingedly connected to the top fixed component 16 provided on the first fixed vertical rod 112, and the first end of the second link 2112 of the first X-shaped rod group 211 is hingedly connected to the interlocking slide sleeve 15 provided on the first fixed vertical rod 112. A first end of a first link 2111 of the third X-shaped rod group 213 is hingedly connected to the top fixed component 16 provided on the second fixed vertical rod 122, and a first end of a second link 2112 of the third X-shaped rod group 213 is hingedly connected to the interlocking slide sleeve 15 provided on the second fixed vertical rod 122. A second end of the first link 2111 of the first X-shaped rod group 211 is hingedly connected to the first end of the fourth link 2122, a second end of the second link 2112 of the first X-shaped rod group 211 is hingedly connected to the first end of the third link 2121, a second end of the first link 2111 of the third X-shaped rod group 213 is hingedly connected to the second end of the third link 2121, and a second end of the second link 2112 of the third X-shaped rod group 213 is hingedly connected to the second end of the fourth link 2122.In the second folding mechanism, a first end of a first link of the first X-shaped rod group is hingedly connected to a top fixed component provided on the fourth fixed vertical rod, a first end of a second link of the first X-shaped rod group is hingedly connected to an interlocking slide sleeve provided on the fourth fixed vertical rod, a first end of a first link of the third X-shaped rod group is hingedly connected to a top fixed component provided on the third fixed vertical rod, a first end of a second link of the third X-shaped rod group is hingedly connected to an interlocking slide sleeve provided on the third fixed vertical rod, a second end of a first link of the first X-shaped rod group is hingedly connected to a first end of a fourth link, a second end of a second link of the first X-shaped rod group is hingedly connected to a first end of a third link, a second end of a first link of the third X-shaped rod group is hingedly connected to a second end of a third link, and a second end of a second link of the third X-shaped rod group is hingedly connected to a second end of a fourth link.

[0032] In a preferred embodiment, the third folding mechanism 23 and the fourth folding mechanism 24 each include two X-shaped rod groups (i.e., the fourth X-shaped rod group 214 and the fifth X-shaped rod group 215). The fourth X-shaped rod group 214 is the X-shaped rod group located at the front end, and the fifth X-shaped rod group 215 is the X-shaped rod group located at the rear end. The first ends of the first links 2111 of the fourth X-shaped rod group 214 and the fifth X-shaped rod group 215 both constitute the fixed end 202, and the first ends of the second links 2112 of the fourth X-shaped rod group 214 and the fifth X-shaped rod group 215 both constitute the interlocking end 201. The third folding mechanism 23 and the fourth folding mechanism 24 have the same configuration and are positioned symmetrically. A specific description will be given with reference to the illustrated example of the third folding mechanism 23. As shown in Figures 8 and 9, in the third folding mechanism 23, a first end of a first link 2111 of the fourth X-shaped rod group 214 is hingedly connected to the top fixed part 16 provided on the fourth fixed vertical rod 142, a first end of a second link 2112 of the fourth X-shaped rod group 214 is hingedly connected to the interlocking slide sleeve 15 provided on the fourth fixed vertical rod 142, a first end of a first link 2111 of the fifth X-shaped rod group 215 is hingedly connected to the top fixed part 16 provided on the first fixed vertical rod 112, and a first end of a second link 2112 of the fifth X-shaped rod group 215 is hingedly connected to the interlocking slide sleeve 15 provided on the first fixed vertical rod 112. The second end of the first link 2111 of the fourth X rod group 214 is hingedly connected to the second end of the first link 2111 of the fifth X rod group 215, and the second end of the second link 2112 of the fourth X rod group 214 is hingedly connected to the second end of the second link 2112 of the fifth X rod group 215.In the fourth folding mechanism, a first end of a first link of the fourth X-shaped rod group is hingedly connected to a top fixed component provided on the third fixed vertical rod, a first end of a second link of the fourth X-shaped rod group is hingedly connected to an interlocking slide sleeve provided on the third fixed vertical rod, a first end of a first link of the fifth X-shaped rod group is hingedly connected to a top fixed component provided on the second fixed vertical rod, a first end of a second link of the fifth X-shaped rod group is hingedly connected to an interlocking slide sleeve provided on the second fixed vertical rod, a second end of a first link of the fourth X rod group is hingedly connected to a second end of a first link of the fifth X rod group, and a second end of a second link of the fourth X rod group is hingedly connected to a second end of a second link of the fifth X rod group.

[0033] Structure 2: As shown in FIG. 10 , the side folding mechanism 2 in the structure 2 employs a first folding mechanism 21 and a second folding mechanism 22, including a first fork rod 231 and a second fork rod 232 located at one end, a third fork rod 233 and a fourth fork rod 234 located at the other end, and a T-shaped folding assembly located at the center. The first fork rod 231 and the second fork rod 232 are hinged to each other at their centers, and the third fork rod 233 and the fourth fork rod 234 are hinged to each other at their centers. The hinge connection points do not have to be located at the center point of the two fork rods, but can be offset from the center point as required. The first end of the first fork rod 231 constitutes the fixed end 202, and the first end of the second fork rod 232 constitutes the interlocking end 201. The first ends of the first fork rod 231 and the second fork rod 232 are located on the same side. A first end of the third fork rod 233 constitutes the fixed end 202, and a first end of the fourth fork rod 234 constitutes the interlocking end 201, and the first ends of the third fork rod 233 and the fourth fork rod 234 are located on the same side. The T-shaped folding assembly includes a fifth fork rod 235, a sixth fork rod 236, and a seventh fork rod 237. A first end of the fifth fork rod 235 is hingedly connected to a second end of the second fork rod 232, a first end of the sixth fork rod 236 is hingedly connected to a second end of the fourth fork rod 234, a second end of the fifth fork rod 235 is hingedly connected to a second end of the sixth fork rod 236, a first end of the seventh fork rod 237 is connected to the hinge connection point between the fifth fork rod 235 and the sixth fork rod 236, and second ends of the first fork rod 231 and the third fork rod 233 are each hingedly connected to the second end of the seventh fork rod 237. Similarly, the first folding mechanism 21 and the second folding mechanism 22 have the same configuration and are positioned symmetrically. A specific description will be given with reference to an illustrated example of the first folding mechanism 21.As shown in Figure 10, the first folding mechanism 21 has a first end of the first fork rod 231 hingedly connected to the top fixed component 16 provided on the first fixed vertical rod 112, a first end of the second fork rod 232 hingedly connected to the interlocking slide sleeve 15 provided on the first fixed vertical rod 112, a first end of the third fork rod 233 hingedly connected to the top fixed component 16 provided on the second fixed vertical rod 122, and a first end of the fourth fork rod 234 hingedly connected to the interlocking slide sleeve 15 provided on the second fixed vertical rod 122. In the second folding mechanism 22, a first end of the first fork rod 231 is hingedly connected to the top fixed component 16 provided on the fourth fixed vertical rod 142, a first end of the second fork rod 232 is hingedly connected to the interlocking slide sleeve 15 provided on the fourth fixed vertical rod 142, a first end of the third fork rod 233 is hingedly connected to the top fixed component 16 provided on the third fixed vertical rod 132, and a first end of the fourth fork rod 234 is hingedly connected to the interlocking slide sleeve 15 provided on the third fixed vertical rod 132. In Structures 1 and 2, when the folding low-back carrier cart is being folded, the fixed end 202 and the interlocking end 201 located on the same side move away from each other, and the interlocking end 201 drives the lifting rod downward. When the folding low-profile carry cart is unfolded, the fixed end 202 and the interlocking end 201 located on the same side approach each other, and the interlocking end 201 drives the lifting rod upward.

[0034] As shown in FIG. 11 , the folding low-profile carry cart further includes a bottom support mechanism 3. The bottom support mechanism 3 is hingedly connected between the four telescopic pillars 1. A first folding mechanism 21 and a second folding mechanism 22 are connected to the bottom support mechanism 3 via a first connection assembly 25 and a second connection assembly 26, respectively. The bottom support mechanism 3 can be folded, contracted, and gathered together, and its height after folding is lower than that of the telescopic pillars 1. Furthermore, the bottom support mechanism 3 includes a first bottom connection part 31 and a second bottom connection part 32. A third bottom connection part 33 is provided to the first connection assembly 25, and a fourth bottom connection part 34 is provided to the second connection assembly 26. The first bottom connection part 31 is rotatably connected to the lower ends of the first telescopic pillar 11 and the fourth telescopic pillar 14 via a first bottom link 35 at a finite angle, and the second bottom connection part 32 is rotatably connected to the lower ends of the second telescopic pillar 12 and the third telescopic pillar 13 at a finite angle via a second bottom link 36. The first bottom connection part 31 is rotatably connected to the third bottom connection part 33 and the fourth bottom connection part 34 via a third bottom link 37 at a finite angle, and the second bottom connection part 32 is rotatably connected to the third bottom connection part 33 and the fourth bottom connection part 34 at a finite angle via a fourth bottom link 38. When the folding low-back carry cart is in the folded state, the heights of the first bottom connection part 31 and the second bottom connection part 32 are each lower than the height of the telescopic pillar 1.

[0035] Specifically, the first connection assembly 25 and the second connection assembly 26 may be booms or flexible parts. When the first folding mechanism 21 and the second folding mechanism 22 have an odd number of X-shaped rod groups, the first connection assembly 25 and the second connection assembly 26 are both booms. When the first folding mechanism 21 and the second folding mechanism 22 have an even number of X-shaped rod groups, the first connection assembly 25 and the second connection assembly 26 are both flexible parts such as wire ropes, with one end of the first connection assembly 25 and the second connection assembly 26 connected to the first folding mechanism 21 and the second folding mechanism 22, respectively, and the other end connected to the third bottom connection part 33 and the fourth bottom connection part 34, respectively. Structure 1 will be taken as an example and described assuming that the first folding mechanism 21 and the second folding mechanism 22 include three X-shaped rod groups. As shown in Figures 4 to 7, the first connection assembly 25 is the first boom 251, the second connection assembly 26 is the second boom 261, and the third bottom connection part 33 and the fourth bottom connection part 34 are both boom joints that are slidably connected to the first boom 251 and the second boom 261. The boom joints are provided with mounting grooves that are hingedly connected to the third bottom link 37 and the fourth bottom link 38, with the opening of the mounting groove facing upward, restricting the third bottom link 37 and the fourth bottom link 38 to only being able to rotate from the inclined state in the folded state to a horizontal state. Stopper joints that restrict the boom joints are provided at the ends of the first boom 251 and the second boom 261, respectively. When the boom joints move along the first boom 251 or the second boom 261 to the stopper joints, the displacement of the boom joints is restricted and they cannot be separated from the corresponding booms. As shown in Figure 11, both the first bottom connecting part 31 and the second bottom connecting part 32 have four mounting grooves arranged symmetrically, and two first bottom links 35 and two third bottom links 37 are respectively rotatably connected to the inner walls of the four mounting grooves provided in the first bottom connecting part 31 in a one-to-one correspondence, and two second bottom links 36 and two fourth bottom links 38 are respectively rotatably connected to the inner walls of the four mounting grooves provided in the second bottom connecting part 32 in a one-to-one correspondence.When the carry cart is unfolded, the bottom of the mounting groove is horizontal, the opening of the mounting groove is downward, two first bottom links 35 and two third bottom links 37 are respectively located in the corresponding mounting grooves provided on the first bottom connecting part 31, and two second bottom links 36 and two fourth bottom links 38 are respectively located in the corresponding mounting grooves provided on the second bottom connecting part 32. After each bottom link rotates from the inclined state in the folded state relative to the first bottom connecting part 31 and the second bottom connecting part 32 until the tube wall abuts against the groove bottom of the mounting groove, each link is restricted by the mounting groove and cannot continue to rotate, thus maintaining a horizontal state and providing effective support for the bottom of the carry cart. An upward-facing mounting groove is provided horizontally at the lower ends of the first telescopic pillar 11, the second telescopic pillar 12, the third telescopic pillar 13, and the fourth telescopic pillar 14, respectively, and two first bottom links 35 are hingedly connected to the mounting grooves at the lower ends of the first telescopic pillar 11 and the fourth telescopic pillar 14, respectively, and two second bottom links 36 are hingedly connected to the mounting grooves at the lower ends of the second telescopic pillar 12 and the third telescopic pillar 13, respectively. The mounting grooves restrict the first bottom link 35 and the second bottom link 36 so that they can only rotate from the inclined state in the folded state to a horizontal state. When the first folding mechanism 21 and the second folding mechanism 22 are in structure 2, in the first folding mechanism 21, the second ends of the first fork rod 231 and the third fork rod 233 are each hingedly connected to the second end of the seventh fork rod 237, and the second end of the seventh fork rod 237 is slidably connected to the third bottom connecting part 33, and in the second folding mechanism 22, the second ends of the first fork rod 231 and the third fork rod 233 are each hingedly connected to the second end of the seventh fork rod 237, and the second end of the seventh fork rod 237 is slidably connected to the fourth bottom connecting part 34.

[0036] As shown in Figures 1, 2, 8, and 9, the folding low-profile carry cart further includes a handle mechanism 4. The handle mechanism 4 includes a telescopic rod 41, a first horizontal rod 42, and a second horizontal rod 43. First ends of the first horizontal rod 42 and the second horizontal rod 43 are hingedly connected to the telescopic rod 41, respectively, and second ends of the first horizontal rod 42 and the second horizontal rod 43 are connected to the lower ends of the first telescopic pillar 11 and the second telescopic pillar 12, respectively, in a one-to-one correspondence so as to be rotatable at a finite angle. The telescopic rod 41 is extendable and retractable, and its height when retracted is lower than that of the telescopic pillar 1. Rollers 5 are provided at the lower ends of the four telescopic pillars 1, respectively. At least one pair of the rollers 5 are swivel wheels, allowing the user to easily control the direction of travel of the carry cart.

[0037] Preferably, the tips of the four telescopic pillars 1 are connected to the four corners of the cloth bag of the folding low-back carrier cart in a one-to-one correspondence. When the carrier cart is being folded or unfolded, the lifting rod is raised or lowered by the folding mechanism, so that after the folding low-back carrier cart is unfolded, the space for the cloth bag attached to the tops of the telescopic pillars 1 becomes larger.

[0038] The terms "first" and "second" used herein are used for illustrative purposes only and should not be understood to indicate or imply relative importance or the number of designated components. Thus, a structure defined by "first" or "second" may explicitly or implicitly include one or more of the designated components. As used herein, "plurality" means two or more, unless otherwise specified.

[0039] In the present invention, unless otherwise specified, terms such as "attached," "coupled," "connected," and "fixed" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific circumstances.

[0040] In the present invention, unless otherwise specified or limited, when a first feature is referred to as being "above" or "below" a second feature, the first and second features may be in direct contact with each other, or may be in indirect contact with each other via an intermediate medium. Furthermore, when a first feature is referred to as being "above" or "above" a second feature, it may simply mean that the first feature is located directly above or diagonally above the second feature, or that the horizontal height of the first feature is higher than that of the second feature. When a first feature is referred to as being "below" or "below" a second feature, it may simply mean that the first feature is located directly below or diagonally below the second feature, or that the horizontal height of the first feature is lower than that of the second feature.

[0041] In the description herein, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific configuration, structure, material, or feature described in this embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific configurations, structures, materials, or features described can be combined as appropriate in any one or more embodiments or examples. Furthermore, if not inconsistent, those skilled in the art can combine different embodiments or examples described herein and features of different embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described above, the above-described embodiments should be considered as examples and not as limitations on the present invention, and it will be understood that those skilled in the art may change, modify, substitute or alter the above-described embodiments within the scope of the present invention. [Explanation of symbols]

[0043] 1 telescopic pillar, 11 first telescopic pillar, 12 second telescopic pillar, 13 third telescopic pillar, 14 fourth telescopic pillar, 15 interlocking slide sleeve, 16 top fixing part, 17 band-shaped hole, 111 first lifting rod, 112 first fixed vertical rod, 121 second lifting rod, 122 second fixed vertical rod, 131 third lifting rod, 132 third fixed vertical rod, 141 fourth lifting rod, 142 fourth fixed vertical rod, 2 side folding mechanism, 21 first folding mechanism, 22 second folding mechanism, 23 third folding mechanism, 24 fourth folding mechanism, 201 Interlocking end, 202 Fixed end, 211 first X-shaped rod group, 212 second X-shaped rod group, 213 third X-shaped rod group, 214 fourth X-shaped rod group, 215 fifth X-shaped rod group, 2111 1st link, 2112 2nd link, 2121 3rd link, 2122 4th link, 231 first fork rod, 232 second fork rod, 233 third fork rod, 234 fourth fork rod, 235 fifth fork rod, 236 sixth fork rod, 237 seventh fork rod, 25 first connection assembly, 26 second connection assembly, 251 first boom, 261 second boom, 3 Bottom support mechanism, 31 First bottom connection part, 32 Second bottom connection part, 33 Third bottom connection part, 34 Fourth bottom connection part, 35 First bottom link, 36 Second bottom link, 37 Third bottom link, 38 Fourth bottom link, 4 handle mechanism, 41 telescopic rod, 42 first horizontal rod, 43 second horizontal rod, 5. Laura

Claims

1. A folding low-profile carry cart including four telescopic pillars (1) spaced apart to form a rectangle and at least two side folding mechanisms (2) arranged opposite each other, each of which has both ends hingedly connected to two adjacent telescopic pillars (1); When the folding low-back carrier cart is folded, the side folding mechanism (2) drives the telescopic pillar (1) connected thereto to shorten, and when the folding low-back carrier cart is unfolded, the side folding mechanism (2) drives the telescopic pillar (1) connected thereto to extend, so that the height of the folding low-back carrier cart in the folded state is smaller than the height of the unfolded state. A folding, low-profile carry cart.

2. The telescopic pillar (1) includes a lifting rod; The top of the lifting rod is the top of the telescopic pillar (1), and both ends of the side folding mechanism (2) are provided with interlocking ends (201) that are hingedly connected to the lifting rod of the corresponding telescopic pillar (1); During the folding of the folding low-profile carrying cart, the length of the side folding mechanism (2) is shortened, and the linking end (201) moves the lifting rod downward; During the unfolding of the folding low-profile carry cart, the length of the side folding mechanism (2) increases, and the linking end (201) moves the lifting rod upward; The height of the side folding mechanism (2) after folding is lower than the height of the telescopic pillar (1).

2. The folding low-profile carry cart according to claim 1.

3. The telescopic pillar (1) further includes a fixed vertical rod; The lifting rod slides vertically up and down relative to the fixed vertical rod, The side folding mechanism (2) further includes fixed ends (202) at both ends, and the fixed ends (202) are hingedly connected to the fixed vertical rods of the corresponding telescopic pillars (1); During folding or unfolding of the side folding mechanism (2), the fixed end (202) rotates on its axis, and the linking end (201) moves the lifting rod along the fixed vertical rod.

3. The folding low-profile carry cart according to claim 2.

4. An interlocking slide sleeve (15) is slidably provided on the fixed vertical rod, The lifting rod is connected to the interlocking slide sleeve (15), and the interlocking end (201) is hingedly connected to the interlocking slide sleeve (15); A top fixing part (16) is provided at the top of the fixed vertical rod, and the fixed end (202) is hingedly connected to the top fixing part (16); During the folding of the folding low-profile carrying cart, the linking end (201) hingedly connected to the linking slide sleeve (15) causes the lifting rod to move downward via the linking slide sleeve (15); During the unfolding of the folding low-profile carry cart, the lifting rod is moved up via the interlocking slide sleeve (15) by the interlocking end (201) hingedly connected to the interlocking slide sleeve (15).

4. The folding low-profile carry cart according to claim 3.

5. The lifting rod is located outside the fixed vertical rod, and the lifting rod is slidably connected to the top fixed part (16), and the top fixed part (16) restricts the lateral position of the lifting rod during the up and down movement of the lifting rod; Alternatively, the fixed vertical rod has a hollow structure, the lifting rod is slidably inserted into the fixed vertical rod, the interlocking slide sleeve (15) is slidably inserted onto the fixed vertical rod, a vertically elongated band-shaped hole (17) is provided in the fixed vertical rod, the lifting rod is connected to the interlocking slide sleeve (15) via a connecting part, and the horizontal position of the lifting rod is restricted by the fixed vertical rod during the up and down movement of the lifting rod.

5. The folding low-profile carry cart according to claim 4.

6. The folding low-profile carry cart has four side folding mechanisms (2) located on the front, rear, left side, and right side, and the structure of the side folding mechanisms (2) located on the left and right sides is Structure 1 or Structure 2, and the structure of the side folding mechanisms (2) located on the front and rear sides is Structure 1; wherein said Structure 1 is: The structure 1 includes a plurality of X-shaped rod groups that are hinged in series, and the X-shaped rod group includes a first link (2111) and a second link (2112) that are hinged to each other at a central portion; In the side folding mechanism (2), a first end of a first link (2111) of the X-shaped rod group located at the tip constitutes the fixed end (202), and a first end of a second link (2112) constitutes the interlocking end (201); The first end of the first link (2111) of the X-shaped rod group located at the rear end constitutes the fixed end (202), and the first end of the second link (2112) constitutes the interlocking end (201); In the same X-shaped rod group, the first end of the first link (2111) and the first end of the second link (2112) are located on the same side; wherein Structure 2 is: The structure 2 includes a first fork rod (231) and a second fork rod (232) located at one end, a third fork rod (233) and a fourth fork rod (234) located at the other end, and a T-shaped folding assembly located in the center; The first fork rod (231) and the second fork rod (232) are hinged to each other at their central portions, and the third fork rod (233) and the fourth fork rod (234) are hinged to each other at their central portions, A first end of the first fork rod (231) constitutes the fixed end (202), a first end of the second fork rod (232) constitutes the interlocking end (201), and the first end of the first fork rod (231) and the first end of the second fork rod (232) are located on the same side; A first end of the third fork rod (233) constitutes the fixed end (202), a first end of the fourth fork rod (234) constitutes the interlocking end (201), and the first end of the third fork rod (233) and the first end of the fourth fork rod (234) are located on the same side; the T-shaped folding assembly includes a fifth fork rod (235), a sixth fork rod (236) and a seventh fork rod (237); a first end of the fifth fork rod (235) hingedly connected to a second end of the second fork rod (232), and a first end of the sixth fork rod (236) hingedly connected to a second end of the fourth fork rod (234); a second end of the fifth fork rod (235) and a second end of the sixth fork rod (236) are hingedly connected; a first end of the seventh fork rod (237) is connected to a hinge connection point between the fifth fork rod (235) and the sixth fork rod (236), and second ends of the first fork rod (231) and the third fork rod (233) are each hinge-connected to the second end of the seventh fork rod (237); In the structure 1 and the structure 2, when the folding low-profile carrier cart is folded, the fixed end (202) and the interlocking end (201) located on the same side are separated from each other, and when the folding low-profile carrier cart is unfolded, the fixed end (202) and the interlocking end (201) located on the same side are close to each other. The folding low-profile carry cart according to any one of claims 3 to 5.

7. The adjacent fixed ends (202) of two adjacent side folding mechanisms (2) are connected to the same top fixed part (16), and the adjacent interlocking ends (201) of two adjacent side folding mechanisms (2) are connected to the same interlocking slide sleeve (15).

7. The folding low-profile carry cart according to claim 6.

8. The folding low-profile carry cart further includes a bottom support mechanism (3), the bottom support mechanism (3) is hingedly connected between the four telescopic pillars (1), and a pair of the side folding mechanisms (2) provided opposite each other are connected to the bottom support mechanism (3) via a first connection assembly (25) and a second connection assembly (26), respectively, so that the bottom support mechanism (3) can be folded, contracted, and gathered together, and the height of the bottom support mechanism (3) after folding is lower than the height of the telescopic pillars (1); The folding low-profile carry cart further includes a handle mechanism (4), which includes a telescopic rod (41), a first horizontal rod (42), and a second horizontal rod (43), wherein first ends of the first horizontal rod (42) and the second horizontal rod (43) are hingedly connected to the telescopic rod (41), respectively, and second ends of the first horizontal rod (42) and the second horizontal rod (43) are connected to the lower ends of two adjacent telescopic pillars (1) in a one-to-one correspondence so as to be rotatable at a finite angle, the telescopic rod (41) is extendable, and the height of the telescopic rod (41) in a retracted state is lower than the height of the telescopic pillars (1), A roller (5) is provided at each of the lower ends of the four telescopic pillars (1), and at least one pair of the rollers (5) is a swivel.

2. The folding low-profile carry cart according to claim 1.

9. The bottom support mechanism (3) includes a first bottom connection part (31) and a second bottom connection part (32), the first connection assembly (25) is provided with a third bottom connection part (33), and the second connection assembly (26) is provided with a fourth bottom connection part (34); The first bottom connection part (31) is connected to the lower ends of the two adjacent telescopic pillars (1) via the first bottom link (35) so as to be rotatable at a finite angle; The second bottom connection part (32) is connected to the lower ends of the other two adjacent telescopic pillars (1) via second bottom links (36) so as to be rotatable at a finite angle; The first bottom connection part (31) is connected to the third bottom connection part (33) and the fourth bottom connection part (34) via a third bottom link (37) so as to be rotatable at a finite angle; The second bottom connection part (32) is connected to the third bottom connection part (33) and the fourth bottom connection part (34) via a fourth bottom link (38) so as to be rotatable at a finite angle; When the folding low-profile carry cart is in a folded state, the heights of the first bottom connecting part (31) and the second bottom connecting part (32) are both lower than the height of the telescopic pillar (1).

9. The folding low-profile carry cart according to claim 8.

10. The tips of the four retractable pillars (1) are connected to the four corners of the cloth bag of the folding low-back carry cart in one-to-one correspondence. The folding low-profile carry cart according to any one of claims 1 to 5.

Images