Foldable cart

Abstract

The invention provides a foldable cart. The cart comprises a plurality of supporting legs and at least one layer of storage rack. Each supporting leg comprises a first branch rod and a second branch rod; the first branch rod and the second branch rod form a telescopic rod structure; a first limiting assembly is arranged on the first branch rod; a second limiting assembly is arranged on the second branch rod; the second limiting assemblies are jointly used for limiting the positions of the first limiting assemblies, and therefore the relative positions of the first branch rods and the second branch rods are limited. Each supporting leg comprises a first unfolded state and a first folded state; when the first limiting assembly is limited by the second limiting assembly, each supporting leg is in a first unfolded state; and when the second limiting assembly cancels the limiting of the first limiting assembly, each supporting leg is in a first folding state. In the embodiment of the invention, the clamping of the second limiting assembly to the first limiting assembly can be canceled after the use of the cart is finished, so that the plurality of supporting legs are folded to realize the longitudinal storage of the storage rack.

Description

Technical Field

[0001] The present application relates to the technical field of transportation vehicles, and in particular to a foldable cart. Background Art

[0002] With the rise of transportation needs in logistics, such as express delivery and laboratory equipment transport, transportation tools are becoming increasingly popular. Among them, handcarts are vehicles that are pushed or pulled by humans. Despite the continuous advancement of material handling technology, handcarts remain an indispensable tool. Handcarts can operate in areas where motor vehicles are inconvenient and are very convenient for transporting light items over short distances, saving effort, time, and money.

[0003] When camping, people usually use a cart to store food. Existing carts may be provided with multiple layers of shelves for placing food. After use, the multiple layers of shelves and the support rods supporting the shelves cannot be folded up, making it inconvenient to store the cart vertically. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention discloses a foldable cart, which can solve the technical problem in the prior art that after the use of the cart is over, the multi-layer storage racks and the support rods supporting the storage racks on the cart cannot be folded and stored, resulting in inconvenience in longitudinal storage.

[0005] In order to achieve the above-mentioned object, the present application provides a foldable cart, characterized in that it includes a plurality of support legs and at least one layer of storage rack;

[0006] The plurality of supporting legs are arranged around the at least one layer of storage rack;

[0007] Each supporting leg includes a first branch rod and a second branch rod; the first branch rod is coaxially arranged at the top end of the second branch rod, and the first branch rod and the second branch rod form a telescopic rod structure;

[0008] The first branch rod is provided with a first limiting assembly; the second branch rod is provided with a second limiting assembly; the second limiting assembly is used together to limit the position of the first limiting assembly, thereby limiting the relative position of the first branch rod and the second branch rod;

[0009] Each of the support legs includes a first expanded state and a first folded state; when the second limiting component limits the first limiting component, each of the support legs can be in the first expanded state; when the second limiting component cancels the limit of the first limiting component, each of the support legs can be transformed from the first expanded state to the first folded state.

[0010] In a possible embodiment, the second limiting assembly includes a first limiting member and a second limiting member spaced apart from top to bottom;

[0011] The second branch rod includes a first rod segment and a second rod segment; the first limiting member is slidably disposed on the first rod segment; the second limiting member is disposed on an end of the second rod segment close to the first rod segment;

[0012] The second branch rod includes a sleeve; the sleeve is sleeved on the outside of the first rod segment and / or the second rod segment; the first branch rod is slidably arranged on the sleeve.

[0013] In a possible embodiment, when the first position-limiting assembly is located between the first position-limiting part and the second position-limiting part, or when the first position-limiting assembly is located above the first position-limiting part, the second position-limiting assembly limits the first position-limiting assembly.

[0014] In a possible embodiment, the first limiting assembly is located on the first branch rod; the first limiting assembly includes a locking seat and at least one locking member;

[0015] The locking seat includes at least one locking groove corresponding to the at least one locking member; each locking member is slidably disposed in the locking groove corresponding to each locking member;

[0016] The second limiting components are used together to limit the position of the at least one locking member, thereby limiting the relative position of the first branch rod and the second branch rod.

[0017] In a possible embodiment, the inner diameter of the first sub-rod is larger than the outer diameter of the second sub-rod, and the second sub-rod is slidably disposed inside the first sub-rod;

[0018] A first compression spring is provided between each of the locking members and the bottom of the corresponding locking groove;

[0019] A tension spring is provided between the first limiting member and a rod body on the second branch rod located above the first limiting member, or a second compression spring is provided between the first limiting member and the second limiting member.

[0020] In a possible embodiment, a first wedge surface is provided on the lower side of the first limiting member;

[0021] A second wedge surface corresponding to the first wedge surface is provided on the upper side of each of the locking members;

[0022] If the initial position of each of the locking members is located between the first limiting member and the second limiting member, when each of the locking members is displaced upward relative to the first limiting member until the upper surface of at least one of the locking members contacts the lower surface of the first limiting member, the first wedge surface squeezes the second wedge surface to push each of the locking members to slide into the corresponding locking groove of each of the locking members, so that each of the locking members can be displaced upward beyond the first limiting member.

[0023] In a possible embodiment, a third wedge surface is provided on the lower side of each of the locking members;

[0024] A fourth wedge surface corresponding to the third wedge surface is provided on the upper side of the first position-limiting member; a fifth wedge surface corresponding to the third wedge surface is provided on the upper side of the second position-limiting member;

[0025] If the initial position of each of the locking members is between the first limiting member and the second limiting member, the fifth wedge surface and the third wedge surface are offset;

[0026] If the initial position of each locking member is above the first limiting member, when each locking member moves downward relative to the first limiting member until the lower surface of at least one locking member contacts the upper surface of the first limiting member and the upper surface of the second limiting member, the fourth wedge surface and the fifth wedge surface successively squeeze the third wedge surface to push each locking member to slide into the corresponding locking groove of each locking member, thereby canceling the limit between the second limiting component and the first limiting component.

[0027] In a possible embodiment, the second limiting member is provided with an accommodating portion capable of accommodating the first limiting member;

[0028] When each of the locking members is displaced downward relative to the first limiting member until the lower surface of at least one of the locking members contacts the upper surface of the first limiting member and is about to contact the upper surface of the second limiting member, the first limiting member slides on the first rod segment to one end close to the second rod segment, and the bottom of the first limiting member is located in the accommodating portion.

[0029] In a possible embodiment, a sixth wedge surface is provided on the lower side of each second limiting member;

[0030] A second wedge surface corresponding to the sixth wedge surface is provided on the upper side of each of the locking members;

[0031] If the initial position of each locking member is located below the second limiting member, when each locking member moves upward until the second wedge surface contacts the sixth wedge surface, the sixth wedge surface squeezes the second wedge surface to push each locking member to slide into the locking groove corresponding to each locking member, thereby allowing at least one locking member to move between the first limiting member and the second limiting member.

[0032] In a possible embodiment, the cart includes four supporting legs and two layers of storage racks;

[0033] The two-layer storage rack is a rectangular storage rack; the four supporting legs are evenly distributed and arranged at the four corners of the rectangular storage rack; the four supporting legs are provided with pulleys at the legs;

[0034] One of the two-layer racks is arranged on the first branch rod; the other of the two-layer racks is arranged on the second branch rod.

[0035] The technical solution provided by the embodiments of the present application has the following technical effects:

[0036] In an embodiment of the present application, when the second limiting component limits the first limiting component, each supporting leg is in the first expanded state. At this time, the second limiting component can support the first limiting component, thereby enabling the second branch rod to support the first branch rod, preventing the first branch rod from sliding down along the second branch rod under the action of gravity, resulting in each supporting leg changing from the first expanded state to the first folded state under the action of gravity or when heavy objects are placed on the shelf. When the second limiting component cancels the limit on the first limiting component, the first branch rod can be retracted into the second branch rod, or the second branch rod can be retracted into the first branch rod, and each supporting leg is in the first folded state.

[0037] In this way, when the second limiting assembly supports the first limiting assembly, the second branch rod can support the first branch rod, so that each support leg can be stably maintained in the first expanded state, thereby achieving a supporting effect for the storage rack. Moreover, after the use of the cart is over, the locking of the second limiting assembly on the first limiting assembly can be cancelled, so that several support legs can be folded to achieve longitudinal storage of the storage rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 1 is a schematic structural diagram of a foldable cart provided in an embodiment of the present application in an unfolded state;

[0040] Figure 2 is a schematic top view of a foldable cart provided in an embodiment of the present application;

[0041] Figure 3 This is a foldable cart provided by the embodiment of the present application. Figure 2 Sectional view along the AA section line;

[0042] Figure 4 This is a foldable cart provided by the embodiment of the present application. Figure 3 Schematic diagram of the working process of the local surface A in the middle Figure 1 ;

[0043] Figure 5 This is a foldable cart provided by the embodiment of the present application. Figure 3 Schematic diagram of the working process of the local surface A in the middle Figure 2 ;

[0044] Figure 6 This is a foldable cart provided by the embodiment of the present application. Figure 3 Schematic diagram of the working process of the local surface A in the middle Figure 3 ;

[0045] Figure 7 This is a foldable cart provided by the embodiment of the present application. Figure 6 A partial enlarged schematic diagram of the local surface B in the middle;

[0046] Figure 8 This is a structural schematic diagram of a foldable cart provided in an embodiment of the present application in a folded state.

[0047] Among them, the number description in the figure:

[0048] 1-support leg; 11-first branch rod; 12-second branch rod; 121-first rod section; 122-second rod section; 123-sleeve; 13-first limiting assembly; 131-locking seat; 132-locking member; 133-locking groove; 134-first compression spring; 135-second wedge surface; 136-third wedge surface; 14-second limiting assembly; 141-first limiting member; 142-second limiting member; 143-tension spring; 144-first wedge surface; 145-fourth wedge surface; 146-fifth wedge surface; 147-accommodation portion; 148-sixth wedge surface; 2-storage rack. DETAILED DESCRIPTION

[0049] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0050] It should be noted that the “one embodiment” or “embodiment” referred to in the description of the embodiments of the present application refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. It should be understood that in the description and claims of the embodiments of the present application and the above-mentioned drawings, the terms “upper”, “lower”, “top”, “bottom”, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present application. The terms “first” and “second” are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of technical features indicated. Therefore, features defined as “first” and “second” may explicitly or implicitly include one or more of such features. Moreover, the terms “first”, “second”, etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0051] like Figures 1 to 8 As shown, the present application provides a foldable cart comprising a plurality of support legs 1 and at least one shelf 2, wherein the shelf 2 can be used to place objects. The plurality of support legs 1 can be arranged around the at least one shelf 2, and the plurality of support legs 1 can be evenly distributed around the at least one shelf 2. The shelf 2 can be a hollowed-out storage column structure, and the user can place or cover a leak-proof structure such as a fabric or support plate on the bottom plate of the shelf 2 during use to prevent objects from leaking from the bottom of the shelf 2.

[0052] In one possible embodiment, each support leg 1 may include a first sub-rod 11 and a second sub-rod 12, wherein the first sub-rod 11 is coaxially disposed at the top of the second sub-rod 12, and the first sub-rod 11 and the second sub-rod 12 form a telescopic rod structure. Optionally, the diameter of the first sub-rod 11 may be slightly larger than the diameter of the second sub-rod 12, so that when the first sub-rod 11 and the second sub-rod 12 are relatively telescopic, the upper portion of the second sub-rod 12 can slide back and forth within the first sub-rod 11. The storage rack 2 may be disposed on either the first sub-rod 11 or the second sub-rod 12.

[0053] Optionally, a first limiting assembly 13 may be provided on the first branch rod 11, and a second limiting assembly 14 may be provided on the second branch rod 12. The second limiting assembly 14 is used to limit the position of the first limiting assembly 13, thereby limiting the relative position of the first branch rod 11 and the second branch rod 12, and further achieving the locking of the first branch rod 11 and the second branch rod 12 in the unfolded state.

[0054] Optionally, each support leg 1 may include a first unfolded state and a first folded state. When the cart is in the folded state, each support leg 1 is in the first folded state. When the cart is in the unfolded state, each support leg 1 is in the first unfolded state.

[0055] Optionally, each layer of the racks 2 may include a second unfolded state and a second folded state. When the cart is in the folded state, each layer of the racks 2 is in the second folded state, and when the cart is in the unfolded state, each layer of the racks 2 is in the second unfolded state.

[0056] In an embodiment of the present application, when the second limiting component 14 limits the first limiting component 13, each support leg 1 is in the first expanded state. At this time, the second limiting component 14 can support the first limiting component 13, so that the second branch rod 12 can support the first branch rod 11, preventing the first branch rod 11 from sliding down along the second branch rod 12 under the action of gravity, resulting in each support leg 1 changing from the first expanded state to the first folded state under the action of gravity or when heavy objects are placed on the shelf 2. When the second limiting component 14 cancels the limit on the first limiting component 13, the first branch rod 11 can be retracted into the second branch rod 12, or the second branch rod 12 can be retracted into the first branch rod 11, and each support leg 1 is in the first folded state.

[0057] Thus, the second branch rod 12 can support the first branch rod 11 when the second limiting assembly 14 supports the first limiting assembly 13, so that each support leg 1 can be stably maintained in the first expanded state, thereby achieving a supporting effect for the storage rack 2, and after the use of the cart is over, the locking of the second limiting assembly 14 on the first limiting assembly 13 can be cancelled, so that several support legs 1 can be folded to achieve the longitudinal storage of the storage rack 2.

[0058] In one possible embodiment, the second position-limiting assembly 14 includes a first position-limiting member 141 and a second position-limiting member 142 spaced apart from each other from top to bottom. In a natural state, a preset spacing distance may be left between the first position-limiting member 141 and the second position-limiting member 142. The first position-limiting member 141 and the second position-limiting member 142 may be used together to limit the first position-limiting assembly 13.

[0059] Optionally, the second sub-rod 12 may include a first rod segment 121 and a second rod segment 122. The first limiting member 141 may be slidably disposed on the first rod segment 121, the second limiting member 142 may be disposed on an end of the second rod segment 122 near the first rod segment 121, and the second limiting member 142 may be fixedly disposed on the second rod segment 122. When the first limiting assembly 13 is located above the first limiting member 141, between the first limiting member 141 and the second limiting member 142, or below the second limiting member 142, these correspond to different limiting states of the second limiting assembly 14 relative to the first limiting assembly 13.

[0060] Optionally, the second sub-rod 12 may include a sleeve 123, which is sleeved outside the first rod segment 121 and / or the second rod segment 122. The first sub-rod 11 may be slidably set on the sleeve 123, and the sleeve 123 may provide sliding support for the first sub-rod 11.

[0061] Optionally, the second limiting member 142 may be fixedly disposed on the second rod segment 122. Optionally, the rod diameter of the first rod segment 121 may be smaller than the rod diameter of the second rod segment 122.

[0062] In a possible embodiment, when the first limiting assembly 13 is located between the first limiting member 141 and the second limiting member 142, or when the first limiting assembly 13 is located above the first limiting member 141, the second limiting assembly 14 limits the first limiting assembly 13, thereby limiting the relative position between the first sub-rod 11 and the second sub-rod 12. At this time, when the first limiting assembly 13 is about to move downward relative to the second limiting assembly 14, the first limiting member 141 or the second limiting member 142 can block the downward movement of the first limiting assembly 13, thereby blocking the downward movement of the first sub-rod 11 relative to the second sub-rod 12, thereby preventing the support leg 1 from changing from the deployed state to the folded state due to accidental shaking or when heavy objects are placed on the storage rack 2.

[0063] In a possible embodiment, the first limiting assembly 13 is located on the first sub-rod 11, and the first limiting assembly 13 includes a locking seat 131 and at least one locking member 132. The locking seat 131 can be connected to the first sub-rod 11 and can be fixedly disposed on the first sub-rod 11.

[0064] Optionally, the locking seat 131 includes at least one locking groove 133 corresponding to at least one locking member 132, the shapes of at least one locking member 132 and at least one locking groove 133 can correspond to each other, and each locking member 132 is slidably arranged in the locking groove 133 corresponding to each locking member 132, and each locking member 132 can slide in the locking groove 133 corresponding to each locking member 132.

[0065] Optionally, the second limiting assembly 14 is used to limit the position of at least one locking member 132 , thereby limiting the relative position of the first sub-rod 11 and the second sub-rod 12 so that each supporting leg 1 can be stably maintained in the first extended state.

[0066] In one possible embodiment, the inner diameter of the first sub-rod 11 is larger than the outer diameter of the second sub-rod 12, and the second sub-rod 12 is slidably disposed within the first sub-rod 11. During the switching process of each support leg 1 between the first deployed state and the second deployed state, the second sub-rod 12 slides within the first sub-rod 11.

[0067] Optionally, a first compression spring 134 is provided between each locking member 132 and the bottom of the locking groove 133 corresponding to each locking member 132. The first compression spring 134 is used to provide a force to the locking member 132 to move the locking member 132 toward the rod axis of the first sub-rod 11, so that the locking member 132 can be offset against the second sub-rod 12 or the first limiting member 141 or the second limiting member 142.

[0068] Optionally, a tension spring 143 is provided between the first limiting member 141 and the rod body of the second sub-rod 12 located above the first limiting member 141, or a second compression spring is provided between the first limiting member 141 and the second limiting member 142. The tension spring 143 or the second compression spring is used to determine the initial position of the first limiting member 141. When the locking member 132 is not in contact with the first limiting member 141 and driving the first limiting member 141 to move, the first limiting member 141 is located at this initial position.

[0069] In a possible embodiment, a first wedge surface 144 is provided on the lower side of the first limiting member 141 , and the first wedge surface 144 is used to contact the first limiting member 141 or the second limiting member 142 .

[0070] Optionally, a second wedge surface 135 corresponding to the first wedge surface 144 is provided on the upper side of each locking member 132. The shape of the second wedge surface 135 can correspond to the shape of the first wedge surface 144. Each locking member 132 can push the first limiting member 141 upward via the second wedge surface 135, and the first limiting member 141 can push the locking member 132 via the second wedge surface 135, causing the locking member 132 to move away from the rod axis of the first sub-rod 11.

[0071] Among them, such as Figure 4As shown, if the initial position of each locking member 132 is located between the first limiting member 141 and the second limiting member 142, when each locking member 132 moves upward relative to the first limiting member 141 until the upper surface of at least one locking member 132 contacts the lower surface of the first limiting member 141, the first wedge surface 144 squeezes the second wedge surface 135, thereby pushing each locking member 132 to slide into the locking groove 133 corresponding to each locking member 132, and the second wedge surface 135 squeezes the first wedge surface 144, thereby pushing the first limiting member 141 to move upward until the second wedge surface 135 surpasses the first wedge surface 144, thereby allowing each locking member 132 to move upward beyond the first limiting member 141.

[0072] In a possible embodiment, a third wedge surface 136 is provided on the lower side of each locking member 132 , and the third wedge surface 136 is used to contact the first limiting member 141 and the second limiting member 142 .

[0073] Optionally, a fourth wedge surface 145 corresponding to the third wedge surface 136 is provided on the upper side of the first limiting member 141, and a fifth wedge surface 146 corresponding to the third wedge surface 136 is provided on the upper side of the second limiting member 142. The shapes of the fourth wedge surface 145 and the fifth wedge surface 146 can correspond to the shapes of the third wedge surface 136. Each locking member 132 can push the first limiting member 141 downward via the third wedge surface 136, and the first limiting member 141 or the second limiting member 142 can push the locking member 132 via the fourth wedge surface 145 or the fifth wedge surface 146, causing the locking member 132 to move away from the rod axis of the first sub-rod 11.

[0074] Optional, such as Figure 4 As shown, if the initial position of each locking member 132 is located between the first limiting member 141 and the second limiting member 142, the fifth wedge surface 146 and the third wedge surface 136 are staggered. At this time, the fifth wedge surface 146 and the third wedge surface 136 cannot squeeze each other, and the second limiting member 142 can achieve the limitation of the first limiting component 13.

[0075] Optional, such as Figure 5As shown, if the initial position of each locking member 132 is above the first limiting member 141, when each locking member 132 moves downward relative to the first limiting member 141 until the lower surface of at least one locking member 132 contacts the upper surface of the first limiting member 141 and the upper surface of the second limiting member 142, the fourth wedge surface 145 and the fifth wedge surface 146 successively squeeze the third wedge surface 136, thereby pushing each locking member 132 to slide into the corresponding locking groove 133 of each locking member 132. After completion, each locking member 132 slides into the first locking position in each locking groove 133. At this time, the fifth wedge surface 146 and the third wedge surface 136 can be aligned, so that the third wedge surface 136 and the fifth wedge surface 146 can be squeezed against each other, so that each locking member 132 continues to slide into the second locking position in each locking groove 133. The second locking position is deeper than the first locking position, so that the locking member 132 retracts into the locking groove 133, thereby canceling the limit between the second limit component 14 and the first limit component 13.

[0076] In a possible embodiment, a receiving portion 147 capable of receiving the first limiting member 141 is provided on the second limiting member 142. The shape of the receiving portion 147 may correspond to the bottom shape of the first limiting member 141. The receiving portion 147 may receive the bottom of the first limiting member 141. The receiving portion 147 may be a receiving hole structure.

[0077] Optional, such as Figure 6 As shown, when each locking member 132 moves downward relative to the first limiting member 141 until the lower surface of at least one locking member 132 contacts the upper surface of the first limiting member 141 and is about to contact the upper surface of the second limiting member 142, the locking member 132 continues to drive the first limiting member 141 to move downward relative to the second limiting member 142. The first limiting member 141 can slide on the first rod segment 121 to an end close to the second rod segment 122, and the bottom of the first limiting member 141 is located within the accommodating portion 147. As a result, the distance between the fourth wedge surface 145 and the fifth wedge surface 146 when the first limiting member 141 contacts the second limiting member 142 can be reduced, making the transition from contact with the first limiting member 141 to contact with the second limiting member 142 smoother for each locking member 132.

[0078] In a possible embodiment, a sixth wedge surface 148 is provided on the lower side of each second limiting member 142 , and the sixth wedge surface 148 is used to contact the locking member 132 .

[0079] Optionally, a second wedge surface 135 corresponding to the sixth wedge surface 148 is provided on the upper side of each locking member 132. The shape of the second wedge surface 135 can correspond to the shape of the sixth wedge surface 148. The second limiting member 142 can compress the second wedge surface 135 via the sixth wedge surface 148, thereby pushing the locking member 132 away from the rod axis of the first sub-rod 11.

[0080] Optionally, if the initial position of each locking member 132 is located below the second limiting member 142, when each locking member 132 moves upward until the second wedge surface 135 contacts the sixth wedge surface 148, the sixth wedge surface 148 squeezes the second wedge surface 135, thereby pushing each locking member 132 to slide into the locking groove 133 corresponding to each locking member 132, that is, the locking member 132 retracts into the locking groove 133, so that at least one locking member 132 can be displaced between the first limiting member 141 and the second limiting member 142.

[0081] In a possible embodiment, the cart includes four supporting legs 1 and two-layer shelves 2. The two-layer shelves 2 can be rectangular shelves 2. The four supporting legs 1 can be evenly distributed at the four top corners of the rectangular shelves 2 to provide stable support for the shelves 2. Pulleys are provided at the legs of the four supporting legs 1.

[0082] Optionally, one of the two-layer racks 2 is arranged on the first branch rod 11 , and the other of the two-layer racks 2 is arranged on the second branch rod 12 .

[0083] like Figure 1 and Figure 8 As shown, the cart in the present application can include a folded state and an unfolded state. When each support leg 1 is in a first folded state and the storage rack 2 is in a second folded state, the cart in the present application is in the folded state. When each support leg 1 is in a first unfolded state and the storage rack 2 is in a second unfolded state, the cart in the present application is in the unfolded state.

[0084] A foldable stroller in this application can adopt the following working principle:

[0085] After the use of the cart in the present application, the plurality of support legs 1 can be retracted from the first unfolded state to the first folded state, so that at least one layer of storage rack 2 on the cart and the support rod supporting the storage rack can be folded and stored, thereby realizing the longitudinal storage of the cart.

[0086] Specifically, people can hold the first branch rod 11 with their hands and shake or pull the first branch rod 11 upward to make the second limiting component 14 on the second branch rod 12 cancel the limit on the first limiting component 13 on the first branch rod 11, thereby making the several support legs 1 transform from the first unfolded state to the first folded state, thereby realizing the longitudinal storage of the cart.

[0087] It is worth noting that the displacement relationship between the components in the first limit assembly 13 and the second limit assembly 14 in this application is relative movement. For example, "when the first limit assembly 13 is about to move downward relative to the second limit assembly 14, the first limit member 141 or the second limit member 142 can block the downward movement of the first limit assembly 13" can be replaced according to actual understanding as "when the second limit assembly 14 is about to move upward relative to the first limit assembly 13, the first limit assembly 13 can block the upward movement of the first limit member 141 or the second limit member 142".

[0088] It should be noted that the above-mentioned order of the embodiments of the present application is for descriptive purposes only and does not represent the superiority or inferiority of the embodiments. The above description is of specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0089] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the device embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

Claims

1. A foldable stroller, characterized in that: It includes several supporting legs and at least one shelf; The plurality of supporting legs are arranged around the at least one layer of storage rack; Each supporting leg includes a first branch rod and a second branch rod; the first branch rod is coaxially arranged at the top end of the second branch rod, and the first branch rod and the second branch rod form a telescopic rod structure; The first branch rod is provided with a first limiting assembly; the second branch rod is provided with a second limiting assembly; the second limiting assembly is used together to limit the position of the first limiting assembly, thereby limiting the relative position of the first branch rod and the second branch rod; Each of the support legs includes a first expanded state and a first folded state; when the second limiting component limits the first limiting component, each of the support legs can be in the first expanded state; when the second limiting component cancels the limit of the first limiting component, each of the support legs can be transformed from the first expanded state to the first folded state.

2. The cart according to claim 1, wherein: The second limiting assembly includes a first limiting member and a second limiting member spaced apart from top to bottom; The second branch rod includes a first rod segment and a second rod segment; the first limiting member is slidably disposed on the first rod segment; the second limiting member is disposed on an end of the second rod segment close to the first rod segment; The second branch rod includes a sleeve; the sleeve is sleeved on the outside of the first rod segment and / or the second rod segment; the first branch rod is slidably arranged on the sleeve.

3. The cart according to claim 2, wherein: When the first position-limiting assembly is located between the first position-limiting part and the second position-limiting part, or when the first position-limiting assembly is located above the first position-limiting part, the second position-limiting assembly limits the first position-limiting assembly.

4. The cart according to claim 1 or 2, wherein: The first limiting assembly is located on the first branch rod; the first limiting assembly includes a locking seat and at least one locking member; The locking seat includes at least one locking groove corresponding to the at least one locking member; each locking member is slidably disposed in the locking groove corresponding to each locking member; The second limiting components are used together to limit the position of the at least one locking member, thereby limiting the relative position of the first branch rod and the second branch rod.

5. The cart according to claim 4, wherein: The inner diameter of the first branch rod is larger than the outer diameter of the second branch rod, and the second branch rod is slidably arranged in the first branch rod; A first compression spring is provided between each of the locking members and the bottom of the corresponding locking groove; A tension spring is provided between the first limiting member and a rod body on the second branch rod located above the first limiting member, or a second compression spring is provided between the first limiting member and the second limiting member.

6. The cart according to claim 4, wherein: A first wedge surface is provided on the lower side of the first limiting member; A second wedge surface corresponding to the first wedge surface is provided on the upper side of each of the locking members; If the initial position of each of the locking members is located between the first limiting member and the second limiting member, when each of the locking members is displaced upward relative to the first limiting member until the upper surface of at least one of the locking members contacts the lower surface of the first limiting member, the first wedge surface squeezes the second wedge surface to push each of the locking members to slide into the corresponding locking groove of each of the locking members, so that each of the locking members can be displaced upward beyond the first limiting member.

7. The cart according to claim 6, wherein: A third wedge surface is provided on the lower side of each of the locking members; A fourth wedge surface corresponding to the third wedge surface is provided on the upper side of the first position-limiting member; a fifth wedge surface corresponding to the third wedge surface is provided on the upper side of the second position-limiting member; If the initial position of each of the locking members is between the first limiting member and the second limiting member, the fifth wedge surface and the third wedge surface are staggered; If the initial position of each of the locking members is above the first limiting member, when each of the locking members moves downward relative to the first limiting member until the lower surface of at least one of the locking members contacts the upper surface of the first limiting member and the upper surface of the second limiting member, the fourth wedge surface and the fifth wedge surface successively squeeze the third wedge surface to push each of the locking members to slide into the corresponding locking groove of each of the locking members, thereby canceling the limit between the second limiting component and the first limiting component.

8. The cart according to claim 4, wherein: The second limiting member is provided with a receiving portion capable of receiving the first limiting member; When each of the locking members is displaced downward relative to the first limiting member until the lower surface of at least one of the locking members contacts the upper surface of the first limiting member and is about to contact the upper surface of the second limiting member, the first limiting member slides on the first rod segment to one end close to the second rod segment, and the bottom of the first limiting member is located in the accommodating portion.

9. The cart according to claim 4, wherein: A sixth wedge surface is provided on the lower side of each second limiting member; A second wedge surface corresponding to the sixth wedge surface is provided on the upper side of each of the locking members; If the initial position of each locking member is located below the second limiting member, when each locking member moves upward until the second wedge surface contacts the sixth wedge surface, the sixth wedge surface squeezes the second wedge surface to push each locking member to slide into the locking groove corresponding to each locking member, thereby allowing at least one locking member to move between the first limiting member and the second limiting member.

10. The cart according to claim 4, wherein: Includes four supporting legs and two-tiered shelves; The two-layer storage rack is a rectangular storage rack; the four supporting legs are evenly distributed and arranged at the four corners of the rectangular storage rack; the four supporting legs are provided with pulleys at the legs; One of the two-layer racks is arranged on the first branch rod; the other of the two-layer racks is arranged on the second branch rod.

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