Foldable carrier

Abstract

A foldable carrier (10) has an unfolded state and a folded state and comprises two joints (100), two side frames, a bottom supporting frame (220) and a top frame (230), each joint (100) comprises a first joint seat (110), a second joint seat (120) and a limiting plate (130) which are coaxially pivoted, and a limiting mechanism is arranged between each joint seat and the limiting plate (130). The limiting mechanism comprises arc grooves (131a and 131b) with the pivot shaft as the circle center, limiting pieces (111 and 121) in sliding fit with the arc grooves and two oppositely-arranged side frames, and each side frame comprises inclined supporting rods (210a and 210b) connected with the joint base. The bottom supporting frame (220) comprises a front frame (222) and a rear frame (223) which can rotate relatively, and the front frame (222) and the rear frame (223) are hinged to one inclined supporting rod (210a) and one inclined supporting rod (210b) respectively; the top frame (230) comprises two U-shaped frames (231 and 232), the two ends of each U-shaped frame are in linkage with the corresponding inclined supporting rods (210a and 210b) hinged to the limiting plate (130), and in the unfolding state, the two limiting pieces (111 and 121) slide to one end of the corresponding arc grooves (131a and 131b) respectively so as to clamp and fix the limiting plate (130). The carrier (10) has a simpler structure and does not require an additional unlocking operation at least during the folding operation.

Description

Foldable carrier Technical Field

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

[0002] Some existing folding vehicles include a frame and a cloth cover mounted on the frame. The frame includes a base frame and a surrounding frame supported on the base frame. When folding is required, the base frame and the surrounding frame can be folded together. Technical issues

[0003] However, the existing frame is relatively large when folded, which is not conducive to packaging, transportation and daily storage. In addition, existing folding vehicles generally have a locking mechanism on the frame to keep the vehicle in the unfolded state. Technical Solutions

[0004] The present application provides a foldable vehicle with a simple structure and convenient operation.

[0005] The present application provides a foldable vehicle having an unfolded state and a folded state, including:

[0006] Two opposing joints, each joint comprising a first joint seat, a second joint seat and a limiting plate coaxially pivoted together, a first limiting mechanism being provided between the first joint seat and the limiting plate, a second limiting mechanism being provided between the second joint seat and the limiting plate, the first limiting mechanism comprising a first arc groove with the pivot axis as the center and a first limiting member slidingly engaged with the first arc groove, the second limiting mechanism comprising a second arc groove with the pivot axis as the center and a second limiting member slidingly engaged with the second arc groove;

[0007] Two side frames arranged opposite to each other, each side frame comprising a first diagonal brace connected to the first joint seat and a second diagonal brace connected to the second joint seat;

[0008] The bottom support frame comprises a front frame and a rear frame which are rotatable relative to each other, wherein the front frame is hinged to the first diagonal support rod, and the rear frame is hinged to the second diagonal support rod;

[0009] The top frame includes a first U-shaped frame and a second U-shaped frame, wherein both ends of the first U-shaped frame are hinged to the limit plate and linked to the first diagonal support rod, and both ends of the second U-shaped frame are hinged to the limit plate and linked to the second diagonal support rod;

[0010] In the expanded state, the first limiting member and the second limiting member slide to one end of the first arc groove and the second arc groove respectively to clamp and fix the limiting plate.

[0011] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution. They are merely further supplements or optimizations. Under the premise that there are no technical or logical contradictions, each optional method can be combined separately for the above-mentioned overall solution, or multiple optional methods can be combined.

[0012] Optionally, the first arc groove and the second arc groove are provided on the limiting plate, the first limiting member is provided on the first joint seat, and the second limiting member is provided on the second joint seat.

[0013] Optionally, the side frame includes a first linkage rod and a second linkage rod, wherein both ends of the first linkage rod are respectively hinged to the first U-shaped frame and the first diagonal support rod, and both ends of the second linkage rod are respectively hinged to the second U-shaped frame and the second diagonal support rod.

[0014] Optionally, in the expanded state, the first U-shaped frame and the second U-shaped frame are arranged in the same plane, the front frame and the rear frame are arranged in the same plane, the first diagonal support rod and the second diagonal support rod are in an inverted V shape, and the amplitude of the V-shaped angle is the maximum, and the limiting parts on each joint seat move along the arc groove in which they are located to the extreme position of the end of the arc groove.

[0015] Optionally, in the folded state, the limiting members on each joint seat move along the arc groove in which they are located to the other end of the arc groove.

[0016] Optionally, the front frame and the rear frame include support rods arranged along the width direction.

[0017] Optionally, also include:

[0018] The push handle rod includes an upper rod and a lower rod that are rotatably matched. The bottom of the lower rod is hinged to the bottom of one of the diagonal support rods. When the push handle rod is folded in half, the top of the upper rod is folded downward and moves toward the bottom of the lower rod. When the push handle rod is folded, it moves toward the limit plate.

[0019] Optionally, a sliding sleeve is slidably provided on the lower rod, and the foldable carrier also includes a connecting rod pivotally connected between the sliding sleeve and one of the diagonal support rods, and a locking mechanism arranged between the sliding sleeve and the lower rod, and the locking mechanism has a locking state that limits the sliding of the sliding sleeve to keep the push handle rod fixed.

[0020] Optionally, an adapter seat is provided on the limiting plate, and the adapter seat is used for detachably connecting auxiliary equipment.

[0021] Optionally, a lining is provided on the top frame.

[0022] The present application also provides a foldable vehicle having an unfolded state and a folded state, including:

[0023] Two opposing joints, each joint comprising a first joint seat, a second joint seat and a limiting plate coaxially pivoted together, a first limiting mechanism being provided between the first joint seat and the limiting plate, a second limiting mechanism being provided between the second joint seat and the limiting plate, the first limiting mechanism comprising a first arc groove with the pivot axis as the center and a first limiting member slidingly engaged with the first arc groove, the second limiting mechanism comprising a second arc groove with the pivot axis as the center and a second limiting member slidingly engaged with the second arc groove;

[0024] Two side frames arranged opposite to each other, each side frame comprising a first diagonal brace connected to the first joint seat and a second diagonal brace connected to the second joint seat;

[0025] The top frame comprises a first U-shaped frame and a second U-shaped frame which are rotatable relative to each other, wherein the first U-shaped frame and the second U-shaped frame are hinged to the first diagonal support rod and the second diagonal support rod respectively;

[0026] A bottom support frame, comprising a front frame and a rear frame, wherein the front frame is hinged to the limit plate and linked to the first diagonal support rod, and the rear frame is hinged to the limit plate and linked to the second diagonal support rod;

[0027] In the expanded state, the first limiting member and the second limiting member slide to one end of the first arc groove and the second arc groove respectively to clamp and fix the limiting plate.

[0028] Optionally, the first arc groove and the second arc groove are provided on the limiting plate, the first limiting member is provided on the first joint seat, and the second limiting member is provided on the second joint seat.

[0029] Optionally, the side frame includes a first linkage rod and a second linkage rod, wherein both ends of the first linkage rod are hinged to the front frame and the first diagonal support rod respectively, and both ends of the second linkage rod are hinged to the rear frame and the second diagonal support rod respectively. Beneficial effects

[0030] The foldable carrier of the present application is kept in an unfolded state by cooperating between two arc grooves and corresponding limiting members. The structure is simpler and no additional unlocking operation is required at least during the folding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a schematic structural diagram of a foldable carrier in an unfolded state according to an embodiment of the present application;

[0032] FIG2 is a schematic structural diagram of FIG1 from another perspective;

[0033] FIG3 is a schematic diagram of the structure of the joint structure in the expanded state without the cover plate;

[0034] FIG4 is a cross-sectional view of the joint structure;

[0035] FIG5 is an exploded view of the joint structure with the cover plate omitted;

[0036] FIG6 is a schematic structural diagram of the joint seat in FIG5 ;

[0037] FIG7 is a schematic structural diagram of a foldable carrier according to an embodiment of the present application during the folding process;

[0038] FIG8 is a schematic structural diagram of FIG7 from another perspective;

[0039] FIG9 is a schematic structural diagram of a foldable carrier in a folded state according to an embodiment of the present application;

[0040] FIG10 is a schematic structural diagram of FIG9 from another perspective;

[0041] FIG11 is a schematic structural diagram of the push handle of the foldable carrier in FIG1 in a second use state;

[0042] FIG12 is a schematic structural diagram of a foldable carrier at a joint structure according to an embodiment of the present application;

[0043] FIG13 is an exploded view of the connection member and the adapter seat of the foldable carrier in FIG12;

[0044] FIG14 is a schematic structural diagram of a foldable carrier provided in accordance with an embodiment of the present application and equipped with two dining trays;

[0045] FIG15 is a schematic structural diagram of a foldable carrier provided in accordance with an embodiment of the present application and equipped with a dinner plate;

[0046] FIG16 is a schematic structural diagram of a foldable carrier in another embodiment provided by the present application when in an unfolded state.

[0047] The reference numerals in the figures are described as follows:

[0048] 10. Foldable carrier;

[0049] 100, joints;

[0050] 110. First joint seat; 111. First position-limiting member; 112. First disc portion; 113. Avoidance hole; 114. Guide groove; 115. First alignment post; 116. Alignment hole;

[0051] 120, second joint seat; 121, second position-limiting member; 122, second disc portion; 123, guide block; 124, second alignment column;

[0052] 130, limiting plate; 131a, first arc groove; 131b, second arc groove; 132, mounting hole; 133, cover plate;

[0053] 210a, first diagonal support rod; 210b, second diagonal support rod; 211a, linkage rod; 211b, linkage rod; 220, bottom support frame; 221, support rod; 222, front frame; 223, rear frame; 224, blocking member; 230, top frame; 231, first U-shaped frame; 232, second U-shaped frame; 240, push handle; 241, lower rod; 242, upper rod; 243, sliding sleeve; 244, connecting rod; 245, unlocking member; 250, adapter seat; 261, dining tray; 262, dining tray;

[0054] 300. Wheel. Modes for Carrying Out the Invention

[0055] The following will be combined with the 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 in 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.

[0056] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be an intermediate component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be an intermediate component.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0058] In this application, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number or order of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0059] In this application, the terms "comprises" and "comprising" and any variations thereof are intended to cover non-exclusive inclusions, for example, a system, product or apparatus comprising a list of elements is not necessarily limited to those elements expressly listed but may include other elements not expressly listed or inherent to such products or apparatuses.

[0060] Referring to Figures 1 to 10, one embodiment of the present application provides a foldable vehicle 10 having an unfolded state and a folded state. As shown in Figures 1 and 2, the foldable vehicle 10 has opposing front and rear sides. The front to rear sides define the length direction L and the width direction relative to W. The other side of the length direction has the same structure as the perspective in the figure, and the two are arranged symmetrically. The left side in Figure 2 is the front side and the right side is the rear side, but this is only for ease of description and understanding and does not limit the direction of movement during use. The foldable vehicle 10 includes two opposing joints 100, two oppositely arranged side frames, a bottom support frame 220, and a top frame 230.

[0061] The two joints 100 are spaced apart along the width direction, and each joint 100 includes a first joint seat 110, a second joint seat 120, and a limiting plate 130 that are coaxially pivoted (around a first axis, the first axis extending along the width direction). A first limiting mechanism is provided between the first joint seat 110 and the limiting plate 130, and a second limiting mechanism is provided between the second joint seat 120 and the limiting plate 130. The first limiting mechanism includes a first circular arc groove 131a with the pivot axis (i.e., the first axis) as the center, and a first limiting member 111 that slides with the first circular arc groove 131a; the second limiting mechanism includes a second circular arc groove 131b with the pivot axis (i.e., the first axis) as the center, and a second limiting member 121 that slides with the second circular arc groove 131b.

[0062] The two side frames are spaced apart along the width direction, and each side frame includes a first diagonal support rod 210a connected to the first joint seat 110, and a second diagonal support rod 210b connected to the second joint seat 120. The bottom support frame 220 includes a front frame 222 and a rear frame 223 that can rotate relative to each other. The front frame 222 is hinged to the first diagonal support rod 210a. The rear frame 223 is hinged to the second diagonal support rod 210b. The top frame 230 includes a first U-shaped frame 231 and a second U-shaped frame 232. The two ends of the first U-shaped frame 231 are hinged to the limit plate 130 and are in motion with the first diagonal support rod 210a. The two ends of the second U-shaped frame 232 are hinged to the limit plate 130 and are in motion with the second diagonal support rod 210b.

[0063] The side frames, top frame 230, and bottom support frame 220 together form a storage space that can be used to store items. The bottom support frame 220 is used to support the front frame 222 and the rear frame 223 in the unfolded state. The first and second stoppers 111 and 121 slide to one end of the first and second arc grooves 131a and 131b, respectively (i.e., the stoppers are at one of their extreme positions), to clamp and fix the stopper plate 130. The three members restrain each other so that the top frame 230 remains in the unfolded state, for example, the first U-shaped frame 231 and the second U-shaped frame 232 are arranged in the same plane. When folded, the first and second stoppers 111 and 121 slide to the other end of the first and second arc grooves 131a and 131b, respectively (i.e., the stoppers are at their other extreme positions).

[0064] In the unfolded state, the top frame is in the unfolded state through the cooperation of the arc groove and the corresponding limit parts. It is not like the existing structure that sets a locking mechanism at the joint position. The structure is simpler, and at least during the folding operation, there is no need to perform an unlocking operation.

[0065] In one embodiment, the first arc groove 131a and the second arc groove 131b are formed on the limiting plate 130, the first limiting member 111 is disposed on the first joint seat 110, and the second limiting member 121 is disposed on the second joint seat 120. The first arc groove 131a and the second arc groove 131b are arranged in two sections spaced apart. During rotation, the two limiting members are always misaligned to avoid interference. The first limiting member 111 and the second limiting member 121 protrude outward along the first axis.

[0066] Furthermore, the limiting plate 130 is arranged axially against the two joint seats along the first axis and rotates in coordination. Both joint seats have a disc portion. In the figure, the first joint seat 110 has a first disc portion 112, and the second joint seat 120 has a second disc portion 122. The disc portions are in contact with each other along the first axis. The disc portion of one joint seat is provided with a avoidance hole 113, and the limiting member on the other joint seat extends into the corresponding arc groove through the avoidance hole 113. Specifically, please refer to Figure 5. The first joint seat 110 is provided with a avoidance hole 113, and the second limiting member 121 extends into the second arc groove 131b through the avoidance hole 113, so that the second joint seat 120 can rotate smoothly. In the figure, the limiting plate 130, the first joint seat 110 and the second joint seat 120 are arranged in sequence from the inside to the outside. In order to increase the aesthetics and safety considerations, the inner side of the limiting plate 130 is also provided with a cover plate 133 to cover the two arc grooves.

[0067] Furthermore, a rotation guide structure that cooperates with each other is provided between the two joint seats, and the rotation guide structure includes:

[0068] The guide groove 114 is formed in one of the joint seats (specifically the first joint seat 110) and extends around the first axis;

[0069] The guide block 123 is fixed to another joint seat (specifically, the second joint seat 120 ) and is slidably engaged with the guide slot 114 .

[0070] In the unfolded state, the guide block 123 is located at the end of the guide groove 114 (i.e., the extreme position, the guide block 123 cannot continue to slide), assisting the two limiting mechanisms to keep the foldable carrier in the unfolded state. Preferably, at this time, the limiting members are simultaneously in the extreme positions of the corresponding arc grooves, i.e., positions A1 and B1 (see Figure 3). When the two joint seats are in the folded state, preferably, the limiting members are in the extreme positions of the corresponding arc grooves, i.e., positions A2 and B2 (see Figure 9).

[0071] In order to facilitate the installation of the first joint seat 110, the second joint seat 120 and the limiting plate 130, the first joint seat 110 is provided with a first alignment post 115 located at the first axis. The limiting plate 130 is provided with a mounting hole 132 and is rotatably mounted on the first alignment post 115 through the mounting hole 132.

[0072] The second joint seat 120 is provided with a second alignment post 124 located at the first axis, and the first joint seat 110 is provided with an alignment hole 116 at a corresponding position to receive the second alignment post 124. Bolts can be used to pass through the second alignment post 124, the first alignment post 115 and the mounting hole 132 to axially fix them.

[0073] The bottom support frame 220 is a deformable structure and is connected between the bottoms of the same pair of diagonal support rods (two diagonal support rods of the same side frame). In the unfolded state, it is a frame-shaped structure. In order to increase the weight of the carried items, a plurality of support rods 221 arranged along the width direction are also provided in the bottom support frame 220. In order to achieve folding, the bottom support frame 220 has a hinge point for itself to fold, and each hinge point is located in the middle of the length direction of the bottom support frame 220. In the folded state (for example, as shown in Figures 8 to 10), each hinge point moves upward relative to the parts on both sides of the hinge point, and the first diagonal support rod 210a and the second diagonal support rod 210b move downward relative to the hinge point and move closer to each other.

[0074] Furthermore, the openings of the first U-shaped frame 231 and the second U-shaped frame 232 are opposite to each other, and a linkage rod is hinged between the first U-shaped frame 231 and the second U-shaped frame 232 and the corresponding diagonal brace rods, that is, the first U-shaped frame 231 is hinged to the first diagonal brace rod 210a by a first linkage rod 211a, and the second U-shaped frame 232 is hinged to the second diagonal brace rod 210b by a second linkage rod 211b. Preferably, the first U-shaped frame 231 and the second U-shaped frame 232 have the same structure, including a transverse section extending in the longitudinal direction and an extension section connected to each end of the transverse section, and the extension sections of the first U-shaped frame 231 and the second U-shaped frame 232 are connected to each other. In the expanded state, the first U-shaped frame 231 and the second U-shaped frame 232 are arranged coplanar and form an annular structure. At this time, the same pair of diagonal braces 210 are in an inverted V shape, and the amplitude of the V-shaped angle is at its maximum. The bottoms of the diagonal support rods are respectively installed with wheels 300 . Of course, wheels 300 can also be installed at the bottom of the bottom support frame 220 .

[0075] Referring again to FIG. 2 , when the foldable carrier 10 is in the unfolded state, the same pair of diagonal support rods form an inverted V-shape, and the amplitude of the V-shaped angle is maximum. The limiting members on each joint seat move along the arc groove in which they are located to the extreme position of the end of the arc groove. That is, at this time, the first limiting member 111 is at position A1, and the second limiting member 121 is at position B1.

[0076] In order to facilitate the operation of the mobile foldable vehicle 10, the foldable vehicle 10 also includes a push rod 240 that is movably connected to at least one of the bottom support frame 220, the side frame or the top frame. The push rod 240 has at least two usage states, such as the first usage state and the second usage state described below. When the push rod 240 is fixed, it is in the first usage state, and an external force can be applied to the push rod 240 to push or pull the foldable vehicle 10; when the push rod 240 is in the second usage state, it can be applied to the push rod 240 to pull the foldable vehicle 10.

[0077] In one embodiment, the handle bar 240 is hinged to at least one of the bottom support frame 220, the side frame, or the top frame 230. For example, as shown in the figure, the bottom of the handle bar 240 is hinged to the side frame. The handle bar 240 also has a folded state. The handle bar 240 includes an upper bar 241 and a lower bar 242 that fold together. The bottom of the lower bar 242 is hinged to the bottom of one of the diagonal support bars (shown as the first diagonal support bar 210a). In the folded state, the upper bar 241 and the lower bar 242 and the folded portion are close to the joint 100. The top of the upper bar 241 folds downward and moves toward the bottom of the lower bar 242 so as not to occupy additional space.

[0078] In one embodiment, the push handle 240 is tilted toward the same side in both the first use state (as shown in FIG1 ) and the second use state (as shown in FIG11 ). In the second use state, the angle of the push handle 240 relative to the horizontal plane can be changed at any time to accommodate operators of different heights and usage scenarios, making it easier to exert force.

[0079] The foldable carrier 10 includes a locking mechanism having a locked state for maintaining the handle bar 240 in the first use state, and an unlocked state. In the unlocked state, the handle bar 240 can be switched to the folded state or the second use state.

[0080] In one embodiment, a sleeve 243 is slidably disposed on the lower rod 242. The foldable vehicle 10 further includes a connecting rod 244 pivotally connected between the sleeve 243 and one of the diagonal braces (shown as the first diagonal brace 210a), and a locking mechanism disposed between the sleeve 243 and the lower rod 242. The locking mechanism has a locking function that restricts the sliding sleeve 243 from sliding to maintain the push handle 240 in a fixed locked state. The push handle 240 is provided with an unlocking member 245 for unlocking the locking mechanism. When the locking mechanism is unlocked, the push handle 240 rotates toward the joint 100. Specifically, the locking mechanism includes a locking hole disposed in the sleeve 243 and a locking block movably disposed within the lower rod 241 and adapted to fit within the locking hole. The lower rod 241 is movably provided with an unlocking member that is linked to the locking block. The unlocking operation involves driving the unlocking member to move so as to cause the locking block to exit the locking hole of the sleeve.

[0081] Referring to Figures 12 to 15 , in one embodiment, the foldable carrier 10 includes an adapter 250 disposed on the limiting plate 130 . The adapter 250 is used to detachably connect auxiliary equipment. Two adapters 250 are arranged along the width of the carrier. Each adapter 250 can be connected to a dining tray 261, as shown in Figure 14 , or two adapters 250 can be simultaneously connected to a dining tray 262, as shown in Figure 15 . The adapter 250 and the limiting plate 130 are fixedly connected.

[0082] In one embodiment, the foldable carrier 10 includes a lining disposed on the top frame 230 , with the bottom of the lining supported by the bottom support frame 220 .

[0083] In one embodiment, a one-way limiting mechanism is provided between the front frame 222 and the rear frame 223 to keep the bottom support frame 230 in an expanded state. The one-way limiting mechanism includes a blocking member 224. The blocking member 224 is a U-shaped structure with an opening facing downward. The blocking member 224 is fixedly connected to one of the front frame 222 or the rear frame 223 and is hinged to the other. In the expanded state, the blocking member 224 abuts against the top of the other. When folding, external force is applied to drive the front frame 222 and the rear frame 223 to fold in half, and the first diagonal support rod 210a and the second diagonal support rod 210b rotate closer to each other. Under the action of the linkage rod, the first U-shaped frame 231 and the second U-shaped frame 232 rotate in opposite directions until the limit member slides to the extreme position (A2, B2 position) in the arc groove. At this time, the folding of the foldable vehicle 10 is completed. After folding, the first diagonal support rod 210, the bottom support frame 220 and the top frame 230 are fitted together, which reduces the space occupied by the frame 200 after folding, making it more suitable for packaging, transportation and storage.

[0084] In the unfolded state, the top frame is in the unfolded state through the cooperation of the arc groove and the corresponding limit parts. It is not like the existing structure that sets a locking mechanism at the joint. The structure is simpler and allows the foldable vehicle itself (except for the push handle) to not need to be set with a locking mechanism to maintain the unfolded state. During the folding and unfolding operations, there is no need to perform unlocking operations, which is more convenient to operate.

[0085] Referring to FIG. 16 , the present application also provides another foldable vehicle having both an unfolded and folded state. The foldable vehicle 10 shown in the figure has opposing front and rear sides, with the front and rear sides defining a length direction L and a relative width direction. The other side of the length direction has the same structure as seen from the perspective in the figure, and the two sides are symmetrically arranged. The left side in the figure represents the front side, and the right side represents the rear side. This is merely for ease of description and understanding, and does not limit the direction of movement during use. The foldable vehicle 10 includes two opposing joints 100, two opposing side frames, a bottom support frame 220, and a top frame 230.

[0086] The two joints 100 are spaced apart in the width direction. The specific structure of the joints 100 is similar to that of the previous embodiment. Each side frame includes a first diagonal brace 210a connected to the first joint seat 110 and a second diagonal brace 210b connected to the second joint seat 120. The difference from the previous embodiment is that:

[0087] The top frame 230 includes a first U-shaped frame 231 and a second U-shaped frame 232 that are rotatable relative to each other. The first U-shaped frame 231 and the second U-shaped frame 232 are hinged to the first diagonal support rod 210a and the second diagonal support rod 210b respectively.

[0088] The bottom support frame 220 includes a front frame 222 and a rear frame 223. The front frame 222 is hinged to the limiting plate 130 and linked to the first diagonal support rod 210a. The rear frame 223 is hinged to the limiting plate 130 and linked to the second diagonal support rod 130b.

[0089] The side frames, top frame 230, and bottom support frame 220 together form a storage space that can be used to store items. The bottom support frame 220 is used to support the front frame 222 and the rear frame 223 in the unfolded state. The first and second stoppers 111 and 121 slide to one end of the first and second arc grooves 131a and 131b (i.e., the stoppers are at one of their extreme positions) to clamp and fix the stopper plate 130. The three members mutually restrain each other to maintain the bottom support frame 220 in the unfolded state, for example, the front frame 222 and the rear frame 223 are arranged in the same plane. When folded, the first and second stoppers 111 and 121 slide to the other end of the first and second arc grooves 131a and 131b (i.e., the stoppers are at their other extreme positions).

[0090] In the unfolded state, the bottom support frame cooperates with the arc groove and the corresponding limit parts to keep itself in the unfolded state. Unlike the existing structure, a locking mechanism is set at the joint position. The structure is simpler, and at least during the folding operation, there is no need to perform an unlocking operation.

[0091] The first diagonal support rod 210a and the second diagonal support rod 210b of the same side frame are a pair of diagonal support rods. When the foldable carrier 10 is unfolded, the pair of diagonal support rods are V-shaped, and the amplitude of the V-shaped angle is the largest.

[0092] In one embodiment, the front frame 222, the rear frame 223 and the corresponding diagonal support rods are linked in a manner as follows: a first linkage rod 211a is hinged between the front frame 222 and the first diagonal support rod 210a, and a second linkage rod 211b is hinged between the rear frame 223 and the second diagonal support rod 210b.

[0093] The remaining structures of the top frame 230 and the bottom support frame 220 refer to the aforementioned embodiments. In one embodiment, the first U-shaped frame 231 and the second U-shaped frame 232 are hinged to each other, and a single-way limiting mechanism is provided between them to maintain themselves in the expanded state. The single-way limiting mechanism can refer to the aforementioned embodiments or the prior art.

[0094] The technical features of the above-described embodiments may be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as no contradiction exists between these combinations of technical features, they should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be deemed that the drawing also discloses examples of combinations of the various embodiments involved.

[0095] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present application, and such modifications and improvements are all within the scope of protection of the present application.

Claims

1. A foldable vehicle having an unfolded state and a folded state, characterized in that: include: Two relative joints, each joint comprises a first joint seat, a second joint seat and a limit plate which are coaxially pivoted, a first limit mechanism is arranged between the first joint seat and the limit plate, a second limit mechanism is arranged between the second joint seat and the limit plate, the first limit mechanism comprises a first arc groove with the pivot axis as the center and a first limit piece which is slidably matched with the first arc groove, and the second limit mechanism comprises a second arc groove with the pivot axis as the center and a second limit piece which is slidably matched with the second arc groove; Two side frames arranged opposite to each other, each side frame comprising a first diagonal brace connected to the first joint seat and a second diagonal brace connected to the second joint seat; The bottom support frame comprises a front frame and a rear frame which are relatively rotatable, wherein the front frame is hinged to the first diagonal support rod, and the rear frame is hinged to the second diagonal support rod; A top frame, comprising a first U-shaped frame and a second U-shaped frame, wherein two ends of the first U-shaped frame are hinged to the limiting plate and linked to the first diagonal brace, and two ends of the second U-shaped frame are hinged to the limiting plate and linked to the second diagonal brace; In the expanded state, the first limiting member and the second limiting member slide to one end of the first arc groove and the second arc groove respectively to clamp and fix the limiting plate.

2. The foldable carrier according to claim 1, characterized in that: The first arc groove and the second arc groove are formed in the limiting plate, the first limiting member is arranged on the first joint seat, and the second limiting member is arranged on the second joint seat.

3. The foldable carrier according to claim 1, characterized in that: The side frame includes a first linkage rod and a second linkage rod, wherein two ends of the first linkage rod are respectively hinged to the first U-shaped frame and the first diagonal support rod, and two ends of the second linkage rod are respectively hinged to the second U-shaped frame and the second diagonal support rod.

4. The foldable carrier according to claim 1, characterized in that: In the expanded state, the first U-shaped frame and the second U-shaped frame are arranged in the same plane, the front frame and the rear frame are arranged in the same plane, the first diagonal support rod and the second diagonal support rod are in an inverted V shape, and the amplitude of the V-shaped angle is the maximum, and the limiting members on each joint seat move along the arc groove to the extreme position at the end of the arc groove.

5. The foldable carrier according to claim 1, characterized in that: In the folded state, the limiting members on each joint seat move along the circular arc groove to the other end of the circular arc groove.

6. The foldable carrier according to claim 1, characterized in that: The front frame and the rear frame include support rods arranged along the width direction.

7. The foldable carrier according to claim 1, characterized in that: Also includes: The push handle rod comprises an upper rod and a lower rod which are rotatably matched, the bottom of the lower rod is hinged to the bottom of one of the diagonal support rods, when the push handle rod is folded in half, the top of the upper rod is folded downward and moved toward the bottom of the lower rod, and when the push handle rod is folded, it moves toward the limit plate.

8. The foldable carrier according to claim 7, characterized in that: A sliding sleeve is slidably arranged on the lower rod, and the foldable carrier also includes a connecting rod pivotally connected between the sliding sleeve and one of the diagonal support rods, and a locking mechanism arranged between the sliding sleeve and the lower rod, and the locking mechanism has a locking state that limits the sliding of the sliding sleeve to keep the push handle rod fixed.

9. The foldable carrier according to claim 1, characterized in that: It includes an adapter seat arranged on the limiting plate, and the adapter seat is used for detachably connecting auxiliary equipment.

10. The foldable carrier according to claim 1, characterized in that: The utility model comprises a lining arranged on the top frame.

11. A foldable vehicle having an unfolded state and a folded state, characterized in that: include: Two relative joints, each joint comprises a first joint seat, a second joint seat and a limit plate which are coaxially pivoted, a first limit mechanism is arranged between the first joint seat and the limit plate, a second limit mechanism is arranged between the second joint seat and the limit plate, the first limit mechanism comprises a first arc groove with the pivot axis as the center and a first limit piece which is slidably matched with the first arc groove, and the second limit mechanism comprises a second arc groove with the pivot axis as the center and a second limit piece which is slidably matched with the second arc groove; Two side frames arranged opposite to each other, each side frame comprising a first diagonal brace connected to the first joint seat and a second diagonal brace connected to the second joint seat; A top frame, comprising a first U-shaped frame and a second U-shaped frame which are relatively rotatable, wherein the first U-shaped frame and the second U-shaped frame are hinged to the first diagonal brace rod and the second diagonal brace rod respectively; A bottom support frame, comprising a front frame and a rear frame, wherein the front frame is hinged to the limit plate and linked to the first diagonal support rod, and the rear frame is hinged to the limit plate and linked to the second diagonal support rod; In the expanded state, the first limiting member and the second limiting member slide to one end of the first arc groove and the second arc groove respectively to clamp and fix the limiting plate.

12. The foldable carrier according to claim 11, characterized in that: The first arc groove and the second arc groove are formed in the limiting plate, the first limiting member is arranged on the first joint seat, and the second limiting member is arranged on the second joint seat.

13. The foldable carrier according to claim 11, characterized in that: The side frame includes a first linkage rod and a second linkage rod, wherein two ends of the first linkage rod are respectively hinged to the front frame and the first diagonal support rod, and two ends of the second linkage rod are respectively hinged to the rear frame and the second diagonal support rod.

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