Carrier

Abstract

The invention discloses a carrier which has a folded state and an unfolded state and comprises a seat frame, a supporting leg assembly and a wheel assembly. The seat frame is provided with a bearing surface; the supporting leg assembly supports the seat frame; the wheel assembly is installed on the supporting leg assembly, and in the folded state, at least part of the supporting leg assembly and / or the wheel assembly can be contained to the side, away from the bearing face, of the seat frame. According to the technical scheme, when the carrier is in the folded state, at least part of the supporting leg assemblies and / or the wheel assemblies can be contained in the side, away from the bearing face, of the seat frame, all parts of the carrier are more gathered, and therefore the occupied space of the carrier after being folded is reduced.

Description

Technical Field

[0001] The invention relates to the field of seat devices, and in particular to a carrier. Background Art

[0002] As people's living standards improve, there are more and more types of vehicles (such as carts or seats, etc.). Currently, many vehicles do not have a folding function; or some vehicles have a folding function, but most vehicles still occupy a large volume after being folded. Summary of the invention

[0003] The main purpose of the present invention is to provide a carrier, which aims to occupy less space after being folded.

[0004] To achieve the above-mentioned purpose, the carrier proposed in the present invention includes a seat frame, a leg assembly and a wheel assembly; the seat frame has a bearing surface; the leg assembly supports the seat frame; the wheel assembly is installed on the leg assembly, and at least part of the leg assembly and / or the wheel assembly can be accommodated on the side of the seat frame away from the bearing surface.

[0005] In one embodiment, the seat frame is formed with a receiving space on a side away from the seating surface, and at least a portion of the leg assembly and the wheel assembly are accommodated in the receiving space.

[0006] In one embodiment, the wheel assembly has a rolling axis; when the wheel assembly is accommodated in a state where the seat frame is facing away from the seat surface, the rolling axis is arranged at an angle with the seat surface.

[0007] In one embodiment, when the wheel assembly is accommodated in the seat frame on a side facing away from the seating surface, the rolling axis of the wheel assembly is arranged perpendicular to the seating surface.

[0008] In one embodiment, the wheel assemblies are provided with at least two, at least one of the wheel assemblies is a universal wheel assembly; and / or at least one of the wheel assemblies is detachably connected to the leg assembly.

[0009] In one embodiment, the end of the leg assembly connected to the seat frame is a first end, and the first end has a rotation axis that can rotate relative to the seat frame, and the rotation axis is set at an angle with the rolling axis of the wheel assembly.

[0010] In one embodiment, a positioning structure is provided on a side of the seat frame facing away from the seating surface, and in the folded state, the wheel assembly is positioned on the seat frame by the positioning structure.

[0011] In one embodiment, the positioning structure includes at least one first positioning structure, and the wheel assembly includes at least a first wheel assembly, and when the first wheel assembly is in a state where the side of the seat frame facing away from the seating surface is received, the first wheel assembly is radially limited by the first positioning structure.

[0012] In one embodiment, the first positioning structure has at least two limiting areas, and the at least two limiting areas are arranged in a direction parallel to the seating surface, so that at least two first wheel assemblies can be respectively accommodated in the limiting areas.

[0013] In one embodiment, the positioning structure includes at least one second positioning structure, and the wheel assembly includes at least a second wheel assembly. In the folded state, the second wheel assembly is mounted on the second positioning structure.

[0014] In one embodiment, the second positioning structure is a fixed column, and the second wheel assembly has a rotating shaft hole; in the folded state, the fixed column is fixedly installed in the rotating shaft hole.

[0015] In one embodiment, the shaft hole and the fixing column are interference fit or snap fit.

[0016] In one embodiment, the leg assembly comprises:

[0017] A first support rod, the first support rod being rotatably connected to the seat frame; and

[0018] A second support rod, one end of which is movably connected to the first support rod, and the other end of which is connected to the wheel assembly; when the leg assembly is in a folded state, the first support rod and the second support rod are both located in the accommodating space.

[0019] In one embodiment, the carrier further comprises a push handle rod assembly connected to the seat frame, wherein the push handle rod assembly can be unfolded and folded relative to the seat frame; and / or,

[0020] The carrier also includes a backrest assembly and a push handle rod assembly connected to the seat frame, and the backrest assembly is connected to the push handle rod assembly or the seat frame.

[0021] The technical solution of the present invention facilitates the carrier to carry items or users of a certain weight by providing a seat frame with a bearing surface, so that the carried items or users can be stably located on the seat frame. By supporting the seat frame with a leg assembly, on the one hand, the supporting strength of the seat frame is improved, and on the other hand, the user located on the seat frame has a certain sitting height, thereby improving the user's comfort. By installing the wheel assembly on the leg assembly, it is convenient to use the carrier of the present invention as a cart, thereby improving the convenience of the user to use the carrier. In the folded state, at least part of the leg assembly and / or the wheel assembly can be accommodated on the side of the seat frame away from the bearing surface, so that the various parts of the carrier are brought closer together, thereby reducing the space occupied by the carrier after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a carrier provided by the present invention in an unfolded state;

[0024] Figure 2 A schematic diagram of an exploded three-dimensional structure of an embodiment of a carrier provided by the present invention;

[0025] Figure 3 A schematic diagram of the three-dimensional structure of an embodiment of a carrier provided by the present invention in a folded state;

[0026] Figure 4 A schematic structural diagram of the process of transformation from an unfolded state to a folded state of an embodiment of a carrier provided by the present invention;

[0027] Figure 5 A schematic diagram of the three-dimensional structure of another embodiment of the carrier provided by the present invention in an unfolded state;

[0028] Figure 6 A schematic structural diagram of the process of transformation from an unfolded state to a folded state of another embodiment of the carrier provided by the present invention;

[0029] Figure 7 A schematic structural diagram of an embodiment of a folded push handle assembly in a vehicle provided by the present invention;

[0030] Figure 8 This is a structural schematic diagram of the folding process of the handlebar assembly in the vehicle provided by the present invention.

[0031] Description of Figure Numbers:

[0032] 100. seat frame; 110. seat surface; 120. accommodation space.

[0033] 200, outrigger assembly; 210, first support rod; 220, second support rod.

[0034] 300, wheel assembly; 310, first wheel assembly; 320, second wheel assembly.

[0035] 400, a first positioning structure; 410, a limiting area.

[0036] 500. A second positioning structure.

[0037] 600, push rod assembly; 610, support rod; 620, connecting rod.

[0038] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] As people's living standards improve, there are more and more types of vehicles (such as carts or seats, etc.). Currently, many vehicles do not have a folding function; or some vehicles have a folding function, but most carts still occupy a large volume after being folded.

[0043] In order to solve this technical problem, the present invention provides a carrier.

[0044] In one embodiment of the present invention, please refer to Figures 1 to 6 , the carrier has a folded state (such as Figure 3 ) and expanded state (as Figure 1 , Figure 2 or Figure 5 As shown), the carrier includes a seat frame 100, a leg assembly 200 and a wheel assembly 300; the seat frame 100 has a bearing surface 110; the leg assembly 200 supports the seat frame 100; the wheel assembly 300 is installed on the leg assembly 200, and in the folded state, at least part of the leg assembly 200 and / or the wheel assembly 300 can be accommodated to the side of the seat frame 100 away from the bearing surface 110.

[0045] The carrier in the technical solution of the present invention can be a cart or a chair. The carrier has a folded state and an unfolded state. When the carrier is in the folded state, it is convenient for users to carry and transport. When the carrier is in the unfolded state, it is the normal use state of the carrier. The seat frame 100 can include only a seat plate or can also include components such as armrests connected to the seat plate to carry items or to carry users. The seat frame 100 has a bearing surface 110, which is a surface that directly supports items or users. The surface can be a plane or a curved surface.

[0046] The leg assembly 200 refers to a component used to support the seat frame 100, so that on the one hand, the bearing strength of the seat frame 100 for carrying items or users can be improved, and on the other hand, the bearing surface 110 of the seat frame 100 can be at a suitable height from the ground, so that the user can have a more comfortable experience when sitting on the bearing surface 110. The leg assembly 200 can be fixedly connected or movably connected to the seat frame 100. When the leg assembly 200 is fixedly connected to the seat frame 100, it can be achieved by screw connection, snap connection, welding, etc., so that the connection between the leg assembly 200 and the seat frame 100 can be more stable. When the leg assembly 200 is movably connected to the seat frame 100, the leg assembly 200 can be slidably connected to the seat frame 100, or the leg assembly 200 can be rotatably connected to the seat frame 100, so that the state of the leg assembly 200 can be changed, which is convenient for the storage of the leg assembly 200, thereby reducing the volume of the carrier when it is in a folded state. The leg assembly 200 may be formed of an integrated support structure or may be composed of a plurality of independent support rods, as long as the leg assembly 200 can support the seat frame 100. In addition, the leg assembly 200 itself may be configured as a foldable structure, for example, the leg assembly 200 itself is a retractable structure or the leg assembly 200 itself includes at least two parts that can be rotated to fold, so that the folding structure of the leg assembly 200 itself can further facilitate the effect of less space occupied by the carrier after folding.

[0047] The vehicle in the present invention further includes a wheel assembly 300. By installing the wheel assembly 300 on the leg assembly 200, the vehicle can be used as a cart when in the unfolded state, that is, when the user pushes the vehicle, the wheel assembly 300 of the vehicle rotates, thereby achieving the effect of moving the vehicle under the push of the wheel assembly 300, which reduces the friction and saves the driving force for the user to push the vehicle. The wheel assembly 300 is usually installed at one end of the leg assembly 200 away from the seat frame 100, and it can be connected to the leg assembly 200 in a detachable connection manner, or it can be connected to the leg assembly 200 in a non-detachable connection manner. Specifically, the wheel assembly 300 can include only a rotating wheel body, or the wheel assembly 300 can include a rotating wheel body and a support frame for supporting the rotating wheel body, and the support frame is connected to the leg assembly 200. The support frame can be plugged or snapped with the leg assembly 200 in a direction perpendicular to the ground, thereby ensuring a stable connection between the leg assembly 200 and the support frame under the pressure of a heavy object or the gravity of the leg assembly 200, reducing the risk of the wheel assembly 300 falling during normal use of the vehicle. Alternatively, the wheel assembly 300 can also be plugged or snapped with the leg assembly 200 in a direction parallel to the ground, thereby facilitating the assembly and disassembly of the wheel assembly 300.

[0048] In the folded state, at least part of the leg assembly 200 and / or the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the seat surface 110, so that the carrier can occupy less space in the folded state. Specifically, when at least part of the leg assembly 200 is accommodated on the side of the seat frame 100 away from the seat surface 110, only part of the leg assembly 200 can be accommodated on the side of the seat frame 100 away from the seat surface 110, or all of the leg assembly 200 can be accommodated on the side of the seat frame 100 away from the seat surface 110; when at least part of the wheel assembly 300 is accommodated on the side of the seat frame 100 away from the seat surface 110, only part of the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the seat surface 110, or all of the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the seat surface 110. In the present invention, only at least a portion of the leg assembly 200 can be accommodated on the side of the seat frame 100 away from the bearing surface 110, or only at least a portion of the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the bearing surface 110; or at least a portion of the leg assembly 200 and at least a portion of the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the bearing surface 110.

[0049] When at least part of the leg assembly 200 can be accommodated on the side of the seat frame 100 away from the seat surface 110, the leg assembly 200 can be rotatably connected to the seat frame 100, so that the leg assembly 200 rotates relative to the seat frame 100 so that one end of the leg assembly 200 for mounting the wheel assembly 300 can be close to the seat surface 110, thereby achieving the effect of accommodating the leg assembly 200 to the side of the seat frame 100 away from the seat surface 110, and reducing the volume of the entire carrier in the direction perpendicular to the seat surface 110. Alternatively, the leg assembly 200 can also be slidably connected to the seat frame 100, so that the leg assembly 200 slides relative to the seat frame 100 to change the relative position of the leg assembly 200 and the seat frame 100, so that the leg assembly 200 is accommodated on the side of the seat frame 100 away from the seat surface 110.

[0050] Based on the fact that at least part of the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the bearing surface 110, the wheel assembly 300 can be detachable relative to the leg assembly 200, so that the wheel assembly 300 is disassembled and installed on the side of the seat frame 100 away from the bearing surface 110; or the wheel assembly 300 is accommodated along with the leg assembly 200 to the side of the seat frame 100 away from the bearing surface 110 when the leg assembly 200 is accommodated to the side of the seat frame 100 away from the bearing surface 110; or, the wheel assembly 300 is rotatably connected to the leg assembly 200, and when the leg assembly 200 is in the accommodated position, the wheel assembly 300 rotates relative to the leg assembly 200 to be accommodated on the side of the seat frame 100 away from the bearing surface 110.

[0051] The technical solution of the present invention facilitates the carrier to carry items or users of a certain weight by providing a seat frame 100 with a bearing surface 110, so that the carried items or users can be stably located on the seat frame 100. By supporting the seat frame 100 with the leg assembly 200, on the one hand, the supporting strength of the seat frame 100 is improved, and on the other hand, the user located on the seat frame 100 has a certain sitting height, thereby improving the user's comfort. By installing the wheel assembly 300 on the leg assembly 200, the movement of the carrier of the present invention is facilitated, thereby improving the convenience of the user to use the carrier. In the folded state, at least part of the leg assembly 200 and / or the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the bearing surface 110, so that the various parts of the carrier are more gathered together, thereby reducing the space occupied by the carrier after folding.

[0052] In one embodiment, if Figure 3 As shown, the seat frame 100 is formed with a receiving space 120 on a side away from the seat surface 110 , and at least a portion of the leg assembly 200 and the wheel assembly 300 are received in the receiving space 120 .

[0053] Specifically, the seat frame 100 includes a seat plate, one side of which forms a bearing surface 110, and the accommodating space 120 can be formed by opening a groove on the side of the seat plate away from the bearing surface 110. Alternatively, the accommodating space 120 can also be formed by enclosing a plurality of plates, and the plurality of plates can be connected by screw connection, welding, bonding or clamping. The accommodating space 120 can be a rectangular space, a circular space or a space of other shapes. The accommodating space 120 can be a large space that is connected as a whole, or it can include a plurality of independent subspaces, so that each subspace can accommodate different components. Among them, part of the leg assembly 200 and the wheel assembly 300 are accommodated in the accommodating space 120; or all the leg assembly 200 and all the wheel assembly 300 are accommodated in the accommodating space 120. The accommodating space 120 may include a first placement area for accommodating the wheel assembly 300 and a second placement area for accommodating the leg assembly 200, and the first placement area and the second placement area can be independent of each other or connected to each other. The first space and the second space can be arranged in parallel, or the second placement area can be arranged around the first placement area. By making the accommodation space 120 include the first placement area and the second placement area arranged around the first placement area, the first placement area is used to accommodate the wheel assembly 300, and the second placement area is used to accommodate the leg assembly 200, the accommodation space 120 can be fully utilized, so that the various parts of the folded carrier are more compact, and the wheel assembly 300 can be placed in the outer ring of the first placement area to increase the volume of the carrier. In this embodiment, the various parts of the carrier have their own appropriate positions and layouts after folding, so that the carrier saves space in the direction parallel to the bearing surface 110.

[0054] In the present embodiment, a receiving space 120 is formed on the side of the seat frame 100 away from the seating surface 110, and at least a portion of the leg assembly 200 and the wheel assembly 300 are accommodated in the receiving space 120. This can, on the one hand, improve the protective effect of the wall of the receiving space 120 on the leg assembly 200 and the wheel assembly 300, and also make the appearance of the folded vehicle more tidy; on the other hand, it also reduces the space occupied by the vehicle in the thickness direction (i.e., the direction perpendicular to the seating surface 110) in the folded state.

[0055] In one embodiment, please refer to Figure 3 and Figure 4 The wheel assembly 300 has a rolling axis, and in the folded state, the rolling axis is set at an angle to the bearing surface 110.

[0056] The rolling axis of the wheel assembly 300 refers to the central axis of the wheel assembly 300 itself, that is, the axis of rotation of the wheel assembly 300 during the rolling process. The rolling axis can be a physical axis structure, or the rolling axis can be a virtual axis. In the unfolded state, the rolling axis of the wheel assembly 300 is arranged in parallel with the bearing surface 110 of the seat frame 100, so that the wheel assembly 300 can drive the bearing surface 110 to move in translation during the rolling process, reducing the risk of shaking of the bearing surface 110. In the folded state, the rolling axis of the wheel assembly 300 is arranged at an angle to the bearing surface 110, so that the surface of the wheel assembly 300 perpendicular to the rolling axis is close to the bearing surface 110, so that when the wheel assembly 300 is stored on the side of the seat frame 100 away from the bearing surface 110, it occupies less space in the direction perpendicular to the bearing surface 110, thereby reducing the space occupied in the thickness direction when the entire carrier is in the folded state.

[0057] It should be noted that the angle between the rolling axis and the bearing surface 110 refers to an angle between the rolling axis and the bearing surface 110 greater than 0° and less than 180°, such as 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, 90°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, 180°, etc. By setting the rolling axis and the bearing surface 110 at an angle in the folded state, the rolling wheel of the wheel assembly 300 is closer to a state parallel to the bearing surface 110, thereby reducing the space occupied by the wheel assembly 300 in the thickness direction, and further making the carrier more conducive to achieving the effect of flattening storage.

[0058] Furthermore, in one example, Figure 4 As shown, in the folded state, the rolling axis is arranged perpendicular to the bearing surface 110.

[0059] By arranging the rolling axis perpendicularly to the bearing surface 110, the surface of the wheel assembly 300 perpendicular to the rolling axis is arranged parallel to the bearing surface 110, thereby greatly reducing the space occupied by the wheel assembly 300 in the thickness direction, and further greatly reducing the occupied volume of the carrier in the thickness direction, achieving the effect of flattening the carrier. In addition, such an arrangement can make the carrier more stable when placed on the platform in the folded state, avoiding the risk of automatic translation due to the rolling of the wheel assembly 300.

[0060] Of course, in other examples, the rolling axis can also be arranged parallel to the seat surface 110 (not shown). In this way, the wheel assembly 300 can occupy less space in the direction parallel to the seat surface 110, thereby reducing the space occupied by the carrier in the direction parallel to the seat surface 110.

[0061] Specifically, in order to achieve the effect that the rolling axis of the wheel assembly 300 is arranged parallel to the bearing surface 110 in the folded state, the rotation axis of the leg assembly 200 when rotating relative to the seat frame 100 can be arranged parallel to the rolling axis when the wheel assembly 300 is installed on the leg assembly 200. For example, when the rolling axis of the wheel assembly 300 extends in the left-right direction, the rotation axis of the leg assembly 200 when rotating relative to the seat frame 100 also extends in the left-right direction. When the rolling axis of the wheel assembly 300 extends in the front-back direction, the rotation axis of the leg assembly 200 when rotating relative to the seat frame 100 also extends in the front-back direction.

[0062] In one embodiment, at least two wheel assemblies 300 are provided, and at least one wheel assembly 300 is a universal wheel assembly 300 .

[0063] By setting at least one wheel assembly 300 as a universal wheel assembly 300, the wheel assembly 300 can be rotated in any direction relative to the leg assembly 200 or the seat frame 100, so that the rolling axis of the wheel assembly 300 can be perpendicular to the bearing surface 110, so that the surface of the vertical rolling axis of the wheel assembly 300 can be parallel to the bearing surface 110, thereby reducing the space occupied by the wheel assembly 300 in the thickness direction, thereby achieving the flattened storage effect of the carrier.

[0064] In one embodiment, please refer to Figure 2 and Figure 4 At least one wheel assembly 300 is detachably connected to the leg assembly 200.

[0065] Specifically, the wheel assembly 300 and the leg assembly 200 can be plugged in or snapped in to achieve a detachable effect of the wheel assembly 300 .

[0066] By detachably connecting the wheel assembly 300 and the leg assembly 200, the wheel assembly 300 can be removed from the leg assembly 200 and stored on the side of the seat frame 100 away from the support surface 110, so that the leg assembly 200 can be flexibly avoided when the wheel assembly 300 is stored, thereby making full use of the space on the side of the seat frame 100 away from the support surface 110, making the folded carrier more compact and reducing the occupied space.

[0067] Furthermore, the leg assembly 200 may include a plurality of support rods, and the plurality of support rods are arranged at intervals or intersect at one point to jointly support the seat frame 100. In the folded state, there is storage space between the plurality of support rods. At this time, the wheel assembly 300 can be removed from the leg assembly 200 and placed in the space enclosed by the plurality of support rods, thereby making full use of the space on the side of the seat frame 100 away from the bearing surface 110, making the folded carrier more compact and occupying less space.

[0068] In one embodiment, when at least two wheel assemblies 300 are provided, at least one wheel assembly 300 is a universal wheel, and at least another wheel assembly 300 is detachably connected to the leg assembly 200 .

[0069] With such arrangement, on the one hand, the universal wheel assembly 300 can be close to the leg assembly after being folded, thereby making the vehicle more compact after being folded; on the other hand, the wheel assembly 300 detachably connected to the leg assembly 200 can be detached and placed in a more suitable position flexibly, so that the vehicle is more compact after being folded, thereby reducing the volume occupied by the folded vehicle.

[0070] In one embodiment, the end of the leg assembly 200 connected to the seat frame 100 is the first end, and the first end has a rotation axis that can rotate relative to the seat frame 100, and the rotation axis is set at an angle with the rolling axis of the wheel assembly 300.

[0071] With such arrangement, when the leg assembly 200 rotates relative to the seat frame 100 and causes the wheel assembly 300 to rotate toward the direction approaching the seat frame 100, the rolling axis of the wheel assembly 300 is no longer parallel to the bearing surface 110, but the rolling axis of the wheel assembly 300 is arranged at an angle to the bearing surface 110, thereby making the space occupied by the wheel assembly 300 in the thickness direction smaller, facilitating the flattening storage effect of the carrier and reducing the space occupied by the carrier in the thickness direction.

[0072] For example, when the rolling axis of the wheel assembly 300 extends in the left-right direction, the rotation axis of the first end of the leg assembly 200 can extend in the front-back direction, so that when the wheel assembly 300 rotates around the rotation axis with the leg assembly 200, the rolling axis of the wheel assembly 300 is perpendicular to the bearing surface 110 to achieve a folded state, thereby maximizing the space occupied by the wheel assembly 300 in the thickness direction, thereby reducing the space occupied by the carrier in the thickness direction.

[0073] In one embodiment, a positioning structure (not shown) is provided on a side of the seat frame 100 facing away from the seating surface 110 . In the folded state, the wheel assembly 300 is positioned on the seat frame 100 by the positioning structure.

[0074] By providing a positioning structure on the side of the seat frame 100 away from the bearing surface 110, and the wheel assembly 300 is positioned on the seat frame 100 by the positioning structure in the folded state, the wheel assembly 300 is in a stable state in the folded state, avoiding the risk of the wheel assembly 300 sliding off the seat frame 100. Specifically, the positioning structure can be a positioning column, a positioning ring, a positioning buckle or a positioning pin, as long as the wheel assembly 300 can be positioned.

[0075] In one embodiment, please refer to Figure 3 and Figure 4 The positioning structure includes at least one first positioning structure 400, and the wheel assembly 300 includes at least a first wheel assembly 310. When the first wheel assembly 310 is accommodated in the side of the seat frame 100 away from the bearing surface 110, the first wheel assembly 310 is radially limited by the first positioning structure 400.

[0076] The radial direction refers to the radial direction of the first wheel assembly 310. By providing the first positioning structure 400, the first positioning structure 400 radially limits the first wheel assembly 310, thereby reducing the risk of radial sliding of the first wheel assembly 310, thereby ensuring that the first wheel assembly 310 has a stable state.

[0077] Specifically, the first positioning structure 400 can be a positioning column, the first wheel assembly 310 has a positioning hole, the center line of the positioning hole coincides with the axis of the first wheel assembly 310, and the positioning column is inserted into the positioning hole, so that the positioning column can achieve the effect of radially limiting the first wheel assembly 310. Alternatively, the first positioning structure 400 is a positioning ring, which can be a circular ring or an arc ring, and the circular outer edge surface of the first wheel assembly 310 abuts against the positioning ring, so that the positioning ring can achieve the effect of radially limiting the first wheel assembly 310. Alternatively, the first positioning structure 400 is a plurality of positioning protrusions arranged along an annular array, and the plurality of positioning protrusions enclose a circular area, and the first wheel assembly 310 is installed in the circular area and is radially limited by the plurality of positioning protrusions.

[0078] In one embodiment, if Figure 4 As shown, the first positioning structure 400 has at least two limiting areas 410 , and the at least two limiting areas 410 are arranged in a direction parallel to the bearing surface 110 , so that at least two first wheel assemblies 310 can be respectively accommodated in the limiting areas 410 .

[0079] By forming the first positioning structure 400 with at least two limiting areas 410, at least two limiting areas 410 are arranged in a direction parallel to the supporting surface 110, and at least two first wheel assemblies 310 are respectively accommodated in the limiting areas 410, then when there are at least two first wheel assemblies 310, at least two first wheel assemblies 310 are arranged in a direction parallel to the supporting surface 110, thereby further reducing the space occupied by the wheel assembly 300 in the folded state in the thickness direction, thereby reducing the volume of the carrier in the thickness direction after being folded.

[0080] Specifically, in order to make the first positioning structure 400 have at least two limiting areas 410, the first positioning structure 400 can be an S-shaped positioning plate, and the S-shaped positioning plate forms two mutually symmetrical limiting areas 410, so that the two first wheel assemblies 310 can be symmetrically arranged in the two limiting areas 410, so that on the one hand, the space occupied by the wheel assembly 300 in the folded state in the thickness direction can be reduced, and on the other hand, the first positioning structure 400 is simpler and convenient for molding and manufacturing. Of course, in other examples, the first positioning structure 400 can also include at least two independent positioning rings, and each first wheel assembly 310 is arranged in an area enclosed by a positioning ring. Or in other examples, the first positioning structure 400 can also be composed of a plurality of positioning columns arranged in an S shape, etc.

[0081] In an example, please refer to Figure 3 and Figure 4 The positioning structure includes at least one second positioning structure 500, and the wheel assembly 300 includes at least a second wheel assembly 320. In the folded state, the second wheel assembly 320 is installed on the second positioning structure 500.

[0082] It is understandable that, in order to ensure the stability of the vehicle, a plurality of leg assemblies 200 may be provided, and a plurality of wheel assemblies 300 may be provided, wherein the wheel assembly 300 may include a first wheel assembly 310 and a second wheel assembly 320. By providing the second positioning structure 500, the second wheel assembly 320 is installed on the second positioning structure 500, thereby achieving the stability of the second wheel assembly 320 after being stored.

[0083] Specifically, the second positioning structure 500 can limit the second wheel assembly 320 only in the radial direction of the second wheel assembly 320, or the second positioning structure 500 can limit the second wheel assembly 320 in both the radial and axial directions. When the second positioning structure 500 only limits the second wheel assembly 320 in its radial direction, the second positioning structure 500 can be a positioning column, the second wheel assembly 320 has a positioning hole, the center line of the positioning hole coincides with the axis of the second wheel assembly 320, and the positioning column is inserted into the positioning hole, so as to achieve the effect of the positioning column limiting the second wheel assembly 320 in the radial direction. Alternatively, the second positioning structure 500 is a positioning ring, which can be a circular ring or an arc ring, and the circular outer edge surface of the second wheel assembly 320 abuts against the positioning ring, so as to achieve the effect of the positioning ring radially limiting the second wheel assembly 320. Alternatively, the second positioning structure 500 is a plurality of positioning protrusions arranged along an annular array, and the plurality of positioning protrusions enclose a circular area, and the second wheel assembly 320 is installed in the circular area and is radially limited by the plurality of positioning protrusions. When the second positioning structure 500 limits the radial and axial directions of the second wheel assembly 320, the second positioning structure 500 can be a buckle, a buckle hole, a screw hole or a screw column, etc., and the second wheel assembly 320 is correspondingly provided with a buckle hole, a buckle, a screw column or a screw hole, etc. Alternatively, the second positioning structure 500 is a first magnetic member, and the second wheel assembly 320 is provided with a second magnetic member, and the first magnetic member and the second magnetic member are magnetically matched to achieve the effect of the second wheel assembly 320 being installed on the second positioning structure 500. It should be noted that the above examples of the second positioning structure 500 can be combined with each other or used separately.

[0084] In an example, please refer to Figure 3 and Figure 4 The second positioning structure 500 is a fixed column, and the second wheel assembly 320 has a rotating shaft hole; in the folded state, the fixed column is fixedly installed in the rotating shaft hole.

[0085] By fixing the fixing column in the rotating shaft hole, the second wheel assembly 320 can be installed in the second positioning structure 500 in a stable state through the relatively fixed state between the fixing column and the rotating shaft hole. Specifically, the fixing column can be a screw column or a bare rod structure. When the fixing column is a screw column, the rotating shaft hole of the second wheel assembly 320 is correspondingly set as a screw hole, so that the second wheel assembly 320 can be in a stable state after the rotating shaft hole of the second wheel assembly 320 is threadedly connected with the fixing column. When the fixing column is a bare rod structure, the rotating shaft hole of the second wheel assembly 320 and the fixing column can be plugged in an interference fit manner, or after the rotating shaft hole of the second wheel assembly 320 and the fixing column are plugged and matched, a wedge is filled between the inner wall of the rotating shaft hole and the fixing column, so as to clamp the second wheel assembly 320 on the second positioning structure 500, thereby ensuring that the second wheel assembly 320 and the second positioning structure 500 have a relatively stable state.

[0086] Of course, in other embodiments, the second positioning structure 500 may also be a fixing hole, and the second wheel assembly 320 has a fixing column, and in the folded state, the fixing column is fixedly installed in the rotating shaft hole.

[0087] In one example, the rotating shaft hole and the fixing column are interference fit or snap fit.

[0088] By providing interference fit between the rotating shaft hole and the fixing column, the operation of installing the second wheel assembly 320 on the second positioning structure 500 is made simpler, thereby improving the installation efficiency and making the processing technology of the fixing column and the rotating shaft hole simpler and more convenient.

[0089] When the shaft hole is engaged with the fixing column, a buckle structure may be provided at one end of the fixing column away from the seat frame 100, so that when the second wheel assembly 320 is installed on the fixing column, the shaft hole of the second wheel assembly 320 is aligned with the fixing column and is sleeved on the fixing column, so that the buckle structure is engaged with the shaft hole, and the effect of installing the second wheel assembly 320 on the second positioning structure 500 can be achieved. By engaging the shaft hole with the fixing column, the operation of installing the second wheel assembly 320 on the second positioning structure 500 can also be made simpler, thereby improving the installation efficiency.

[0090] In one embodiment, if Figure 3 As shown, the wheel assembly 300 includes a first wheel assembly 310 and a second wheel assembly 320 , wherein the second wheel assembly 320 is at least partially disposed on a side of the first wheel assembly 310 facing away from the seating surface 110 .

[0091] By such arrangement, the space occupied by the wheel assembly 300 in the direction parallel to the bearing surface 110 can be reduced, so that the space occupied by the entire wheel assembly 300 in the thickness direction and the direction parallel to the bearing surface 110 will not be too large, and the volume of the seat frame 100 can be set not too large, thereby reducing the space occupied by the entire carrier after folding. In addition, when the second wheel assembly 320 is fixedly connected to the second positioning structure 500, so that the second positioning structure 500 can limit the axial and radial directions of the second wheel assembly 320, when the second wheel assembly 320 is at least partially arranged on the side of the first wheel assembly 310 away from the bearing surface 110, the second wheel assembly 320 will have an axial limiting effect on the first wheel assembly 310, so as to ensure that the first wheel assembly 310 and the second wheel assembly 320 will not fall in the direction away from the bearing surface 110, and only a radial limiting structure for the first wheel assembly 310 needs to be set on the seat frame 100, thereby simplifying the positioning structure of the wheel assembly 300.

[0092] Specifically, the first wheel assembly 310 and the second wheel assembly 320 can all be detachably connected to the foot assembly 200; or, at least one of the first wheel assembly 310 and the second wheel assembly 320 is not detachable from the foot assembly 200; or, at least one of the first wheel assembly 310 and the second wheel assembly 320 is a universal wheel.

[0093] In order to further increase the space occupied by the carrier after folding, in one embodiment, please refer to Figures 1 to 6 The leg assembly 200 includes a first support rod 210 and a second support rod 220. The first support rod 210 is rotatably connected to the seat frame 100. One end of the second support rod 220 is movably connected to the first support rod 210, and the other end is connected to the wheel assembly 300. In the folded state, the first support rod 210 and the second support rod 220 are both located in the accommodating space 120.

[0094] By configuring the leg assembly 200 to include a first support rod 210 and a second support rod 220, the first support rod 210 is rotatably connected to the seat frame 100, one end of the second support rod 220 is movably connected to the first support rod 210, and the other end is connected to the wheel assembly 300, the first support rod 210 and the second support rod 220 together form a leg for supporting the seat frame 100, and since the first support rod 210 and the second support rod 220 are movably connected, the leg assembly 200 can be folded when the first support rod 210 and the second support rod 220 move relative to each other, so that the leg assembly 200 can be folded and occupy a smaller space.

[0095] For details, please refer to Figure 1 , Figure 2 as well as Figure 4The first support rod 210 and the second support rod 220 can be slidably connected, so that when the first support rod 210 and the second support rod 220 slide against each other, the first support rod 210 and the second support rod 220 can overlap or expand each other. In addition, such a configuration allows the leg assembly 200 to be retractable, thereby achieving the effect of adjusting the height of the seat frame 100. Alternatively, please refer to Figure 5 and Figure 6 , the second support rod 220 rotates relative to the first support rod 210, and one end of the second support rod 220 provided with the wheel assembly 300 can rotate toward the end of the first support rod 210 connected to the seat frame 100, so that the second support rod 220 is folded onto the first support rod 210, and the leg assembly 200 itself can be folded. In combination with the first support rod 210 being rotatably connected to the seat frame 100, the second support rod 220 is movably connected to the first support rod 210, so that the second support rod 220 can be folded onto the first support rod 210 first, and then the first support rod 210 is driven to rotate relative to the seat frame 100 so that the first support rod 210 moves toward the seat frame 100 in a direction that is almost parallel to the seat surface 110 of the seat frame 100, so that the folded leg assembly 200 has a smaller occupied area, so that the leg assembly 200 can be completely accommodated in the accommodation space of the seat frame 100, thereby reducing the area occupied by the entire carrier, and making the appearance of the carrier more concise after folding.

[0096] In one embodiment, please refer to Figures 5 to 8 The vehicle further includes a push handle rod assembly 600 connected to the seat frame 100 , and the push handle rod assembly 600 can be unfolded and folded relative to the seat frame 100 .

[0097] By providing the push handle rod assembly 600, a gripping position is provided for the user to push the vehicle, so that the user can push the vehicle easily. By making the push handle rod assembly 600 unfoldable and foldable relative to the seat frame 100, the space occupied by the push handle rod assembly 600 is reduced after being folded, thereby making the space occupied by the entire vehicle after being folded less.

[0098] Specifically, in one example, the push handle rod assembly 600 can be an integrally formed U-shaped bracket, the U-shaped bracket is retractable, and / or the U-shaped bracket can rotate relative to the seat frame 100, and / or the U-shaped bracket can rotate relative to the seat frame 100.

[0099] In another example, the push handle rod assembly 600 may include at least two support rods 610 arranged at intervals, and the support rods 610 are connected to the seat frame 100; wherein the support rods 610 can be telescopic and / or the support rods 610 can rotate relative to the seat frame 100. It is understood that when the support rod 610 is a telescopic rod and the support rod 610 can rotate relative to the seat frame 100, then during the folding process, the support rod 610 can be retracted to the shortest state first, and then the support rod 610 can be rotated relative to the seat frame 100, so that the support rod 610 rotates to a state close to parallel with the bearing surface 110, thereby reducing the occupied space in the thickness direction and the direction parallel to the bearing surface 110 after the carrier is folded. Further, the push handle rod assembly 600 may also include a connecting rod 620, and the two ends of the connecting rod 620 are respectively connected to the two support rods 610. It is understandable that when the support rod 610 rotates, the connecting rod 620 also rotates with the support rod 610, and the seat frame 100 can be located in the area enclosed by the folded support rod 610 and the connecting rod 620, thereby further reducing the space occupied by the carrier in the thickness direction. Alternatively, the support rod 610 includes at least two sections of rod bodies that can rotate relative to each other, and the at least two sections rotate relative to each other to achieve the effect of folding the support rod 610, and then the folded support rod 610 rotates relative to the seat frame 100, so that the support rod 610 is almost parallel to the seat surface 110 of the seat frame 100 after at least two folds, thereby reducing the occupied space of the carrier in both the direction parallel to the seat surface 110 and the direction perpendicular to the seat surface 110.

[0100] In another example, the push rod assembly 600 may include at least two support rods 610 arranged at intervals, and the support rods 610 are detachably connected to the seat frame 100; wherein the support rods 610 are telescopic and / or the support rods 610 include at least two rod sections that can rotate relative to each other. It is understood that when the support rods 610 are telescopic rods, during the folding process, the support rods 610 can be retracted to a shorter state first, and then the support rods 610 can be removed from the seat frame 100, or the support rods 610 can be removed from the seat frame 100 first and then retracted to a shorter state, so that the support rods 610 are accommodated on the side of the seat frame 100 away from the bearing surface 110, and the folded support rods 610 are arranged parallel to the bearing surface 110, thereby reducing the occupied space in the thickness direction and the direction parallel to the bearing surface 110 after the carrier is folded. When the support rod 610 includes at least two sections of rod bodies that can rotate relative to each other, the at least two sections rotate relative to each other to achieve the effect of folding the support rod 610, and then the folded support rod 610 is removed from the seat frame 100, or the support rod 610 is first removed from the seat frame 100 and then folded, so that the support rod 610 is accommodated on the side of the seat frame 100 away from the bearing surface 110, and the folded support rod 610 is arranged parallel to the bearing surface 110, so that the occupied space in the thickness direction and the direction parallel to the bearing surface 110 after the carrier is folded can be reduced. Specifically, a slot can be provided on the side of the seat frame 100 away from the bearing surface 110, and the disassembled support rod 610 can be inserted into the slot.

[0101] In one embodiment, the carrier further includes a backrest assembly (not shown) and a handlebar assembly 600 connected to the seat frame 100 , and the backrest assembly is connected to the handlebar assembly 600 or the seat frame 100 .

[0102] The backrest assembly can be connected to the seat frame 100. In order to reduce the occupied space of the vehicle after folding, the backrest assembly can be folded or unfolded relative to the seat frame 100. For example, the backrest assembly can be rotatably connected to the seat frame 100. When in normal use, the backrest assembly can be rotated to a position at an angle with the bearing surface 110 of the seat frame 100; when switched to the folded state, the backrest assembly can be folded relative to the seat frame 100 to move closer to the seat frame 100.

[0103] The backrest assembly can be arranged between the two support rods 610 of the push handle rod assembly 600, and the backrest assembly can be connected to the push handle rod assembly 600 or not. When the backrest assembly is arranged between the two support rods 610 and connected to the support rod 610, the backrest assembly can be folded together with the support rod 610 of the push handle rod assembly 600. For example, when the support rod 610 is a telescopic rod, the backrest assembly is connected to one section of the rod body of the support rod 610 to achieve the effect of telescoping with the support rod 610. When the support rod 610 rotates relative to the seat frame 100 to move closer to the bearing surface 110, the backrest assembly also rotates with the support rod 610 to move closer to the bearing surface 110. When the backrest assembly is folded with the push handle rod assembly 600, the backrest assembly can be a hard backrest or a soft backrest, as long as the effect of being able to fold with the push handle rod assembly 600 can be achieved. Alternatively, when the push handle rod assembly 600 includes the support rod 610 and the connecting rod 620, the connecting rod 620 and / or the support rod 610 directly serve as the backrest assembly.

[0104] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A carrier, characterized in that: The vehicle has a folded state and an unfolded state, and comprises: A seat frame having a seating surface; a leg assembly supporting the seat frame; and A wheel assembly is installed on the leg assembly. In the folded state, at least part of the leg assembly and / or the wheel assembly can be accommodated on a side of the seat frame away from the seating surface.

2. The carrier according to claim 1, characterized in that: The seat frame is formed with a receiving space on a side away from the bearing surface, and at least a part of the leg assembly and the wheel assembly are accommodated in the receiving space.

3. The carrier according to claim 1, characterized in that: The wheel assembly has a rolling axis. In the folded state, the rolling axis is arranged at an angle with the seating surface, or the rolling axis is arranged perpendicular to the seating surface.

4. The carrier according to claim 1, characterized in that: The wheel assemblies are provided with at least two, at least one of which is a universal wheel assembly; and / or at least one of which is detachably connected to the leg assembly.

5. The carrier according to claim 1, characterized in that: One end of the leg assembly connected to the seat frame is a first end, and the first end has a rotating axis that can rotate relative to the seat frame. The wheel assembly has a rolling axis, and the rotating axis is arranged at an angle with the rolling axis.

6. The carrier according to claim 1, characterized in that: A positioning structure is provided on a side of the seat frame facing away from the seating surface. In the folded state, the wheel assembly is positioned on the seat frame by the positioning structure.

7. The carrier according to claim 6, characterized in that: The positioning structure includes at least one first positioning structure, and the wheel assembly includes at least a first wheel assembly, and when the first wheel assembly is accommodated at a side of the seat frame away from the seat surface, the first wheel assembly is radially limited by the first positioning structure; The first positioning structure has at least two limiting areas, and the at least two limiting areas are arranged in a direction parallel to the seating surface, so that at least two first wheel assemblies can be respectively accommodated in the limiting areas.

8. The carrier according to claim 6, characterized in that: The positioning structure includes at least one second positioning structure, and the wheel assembly includes at least a second wheel assembly, and in the folded state, the second wheel assembly is mounted on the second positioning structure; The second positioning structure is a fixed column, and the second wheel assembly has a rotating shaft hole; in the folded state, the fixed column is fixedly installed in the rotating shaft hole; The rotating shaft hole and the fixing column are interference-fitted or snap-fitted.

9. The carrier according to any one of claims 2 to 8, characterized in that: The leg assembly comprises: A first support rod, the first support rod being rotatably connected to the seat frame; and A second support rod, one end of which is movably connected to the first support rod, and the other end of which is connected to the wheel assembly; in the folded state, the first support rod and the second support rod are both located in the accommodating space.

10. The carrier according to claim 1, characterized in that: The carrier further comprises a push handle assembly connected to the seat frame, wherein the push handle assembly can be unfolded and folded relative to the seat frame; and / or, The carrier also includes a backrest assembly and a push handle rod assembly connected to the seat frame, and the backrest assembly is connected to the push handle rod assembly or the seat frame.

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