Carrier

Abstract

The utility model discloses a carrier which comprises a seat frame, a supporting leg assembly and a wheel assembly, the seat frame is provided with a supporting face used for bearing weight, and a containing space is formed on one side of the supporting face. The supporting leg assembly is rotationally connected to the seat frame and has an unfolded state and a folded state; in the folding state, at least part of the supporting leg assembly is contained in the containing space; the wheel assembly is detachably connected to the supporting leg assembly, and the wheel assembly can be contained in the containing space in the detached state. According to the technical scheme, after the carrier is folded, small space is occupied in the direction parallel to the supporting face of the seat frame of the carrier.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle tools, 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 have a folding function, but most of them still occupy a large volume after folding, especially the wheels and legs of traditional vehicles are not removable, so after the vehicle is folded, it occupies a large space in the direction parallel to the support surface of the seat frame of the vehicle. Utility Model Content

[0003] The main purpose of the utility model is to provide a carrier, which aims to achieve that after the carrier is folded, it can occupy less space in a direction parallel to the supporting surface of its seat frame.

[0004] To achieve the above-mentioned purpose, the carrier proposed in the utility model includes a seat frame, a leg assembly and at least one wheel assembly, the seat frame has a support surface, and a accommodating space is formed on the side away from the support surface; the leg assembly is rotatably connected to the seat frame and has an unfolded state and a folded state; in the folded state, at least a portion of the leg assembly is accommodated in the accommodating space; at least one wheel assembly is detachably connected to the leg assembly, and the wheel assembly can be accommodated in the accommodating space in the detached state.

[0005] In one embodiment, the wheel assembly is plugged or snap-fitted to an end of the leg assembly away from the seat frame.

[0006] In one embodiment, the wheel assembly has a rolling axis, and when the wheel assembly is accommodated in the accommodating space, the rolling axis is arranged parallel to the supporting surface; or the rolling axis is arranged at an angle to the supporting surface.

[0007] In one embodiment, the wheel assembly is provided with at least two groups, and when the wheel assembly is accommodated in the accommodating space, projections of at least two groups of the wheel assembly on the support surface at least partially overlap.

[0008] In one embodiment, the accommodating space includes a first placement area and a second placement area arranged around the first placement area, the first placement area is used to accommodate the wheel assembly, and the second placement area is used to accommodate the leg assembly.

[0009] In one embodiment, a limiting structure is provided in the accommodating space, and the wheel assembly includes a first wheel assembly; when the first wheel assembly is accommodated in the accommodating space, the first wheel assembly is radially limited by the limiting structure.

[0010] In one embodiment, the accommodating space is provided with a fixing structure; the wheel assembly further comprises a second wheel assembly; when the second wheel assembly is accommodated in the accommodating space, the second wheel assembly is fixedly mounted on the fixing structure.

[0011] In one embodiment, the fixing structure is a fixing column, and the second wheel assembly has a shaft hole; when the second wheel assembly is accommodated in the accommodating space, the shaft hole and the fixing column are interference-fitted or snap-fitted.

[0012] In one embodiment, the leg assembly comprises:

[0013] A first support rod, the first support rod being rotatably connected to the seat frame; and

[0014] 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.

[0015] In one embodiment, the carrier further comprises a push handle rod assembly connected to the seat frame, and the push handle rod assembly has an unfolded state and a folded state;

[0016] And / or, the carrier further comprises 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.

[0017] The technical solution of the utility model is to connect the leg assembly to the seat frame by rotation, so that the end of the leg assembly close to the seat frame can rotate relative to the seat frame, and the end of the leg assembly not connected to the seat frame can rotate in the direction close to the seat frame, thereby achieving the folding effect of the leg assembly, so that the carrier has a folding function and is convenient for storage. Alternatively, the end of the leg assembly not connected to the seat frame rotates in the direction away from the seat frame to achieve the unfolded state of the leg assembly, so as to support the seat frame. In addition, by installing the wheel assembly to the leg assembly, the vehicle can realize the movement of the seat frame by the rolling of the wheel assembly, thereby reducing the friction of the vehicle relative to the ground and saving the driving force when pushing the vehicle to move. By placing the leg assembly in a folded state and at least partially containing the leg assembly in the accommodating space, on the one hand, the protective effect of the wall of the accommodating space on the leg assembly can be improved, and on the other hand, the appearance of the folded vehicle can be made neater. By detachably connecting the wheel assembly to the leg assembly, the wheel assembly can be separated from the leg assembly after being disassembled, which makes it easy to replace the wheel assembly on the one hand, and also makes it easy to place the wheel assembly in the space enclosed by the leg assembly after being disassembled, thereby making full and reasonable use of the accommodating space. When the leg assembly is in a folded state, the wheel assembly occupies less space in the direction of the supporting surface parallel to the seat frame, thereby improving space utilization and reducing the area of ​​the supporting surface. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a carrier provided by the utility model in an unfolded state;

[0020] Figure 2 A schematic diagram of an exploded three-dimensional structure of an embodiment of a carrier provided by the utility model;

[0021] Figure 3 A schematic diagram of the three-dimensional structure of an embodiment of a carrier provided by the utility model in a folded state;

[0022] 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 utility model;

[0023] Figure 5 A schematic diagram of the three-dimensional structure of another embodiment of the carrier provided by the utility model in an unfolded state;

[0024] 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 utility model;

[0025] Figure 7 It is a structural schematic diagram of an embodiment of a folded push handle rod assembly in a vehicle provided by the utility model;

[0026] Figure 8 This is a structural schematic diagram of the folding process of the handlebar assembly in the vehicle provided by the utility model.

[0027] Description of Figure Numbers:

[0028] 100, seat frame; 110, support surface; 120, accommodating space; 121, first placement area; 122, second placement area.

[0029] 200, outrigger assembly; 210, first support rod; 220, second support rod.

[0030] 300, wheel assembly; 310, first wheel assembly; 320, second wheel assembly.

[0031] 400. Limiting structure.

[0032] 500. Fixed structure.

[0033] 600, push rod assembly; 610, support rod; 620, connecting rod.

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), 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 indications will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, 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 utility model.

[0038] As people's living standards improve, there are more and more types of vehicles (such as carts or seats, etc.). Currently, many vehicles have a folding function, but most of them still occupy a large volume after folding, especially the wheels and legs of traditional vehicles are not removable, so that after the vehicle is folded, the wheel assembly is always connected to the legs, and the wheel assembly occupies space in the extension direction of the legs or the peripheral direction thereof, that is, it occupies a large space in the direction parallel to the support surface of the seat frame of the vehicle.

[0039] In order to solve this technical problem, the utility model provides a carrier.

[0040] In an embodiment of the present utility model, please refer to Figures 1 to 4 The carrier includes a seat frame 100, a leg assembly 200 and at least one wheel assembly 300. The seat frame 100 has a support surface 110, and a receiving space 120 is formed on a side away from the support surface 110; the leg assembly 200 is rotatably connected to the seat frame 100 and has an unfolded state and a folded state; in the folded state, at least a portion of the leg assembly 200 is received in the receiving space 120; at least one wheel assembly 300 is detachably connected to the leg assembly 200, and the wheel assembly 300 can be received in the receiving space 120 in the detached state.

[0041] The carrier in the utility model can be a cart or a chair. The leg assembly 200 has a folded state and an unfolded state. When the leg assembly 200 is in the folded state, it is convenient for the user to carry and transport. When the legs are in the unfolded state, it is the normal use state of the carrier. The seat frame 100 can include only a seat plate or also include components such as armrests connected to the seat plate, which are used to carry objects or to carry users. The seat frame 100 has a support surface 110, which is a surface that directly supports objects or users. The surface can be a plane or a curved surface.

[0042] 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 support 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 support surface 110. 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, so that one end of the leg assembly 200 for mounting the wheel assembly 300 can be stored in a direction close to the seat frame 100, thereby reducing the volume of the vehicle when it is in a folded state. The leg assembly 200 can be formed by an integrated bracket structure, or it can be composed of multiple independent support rods, as long as the effect of the leg assembly 200 supporting the seat frame 100 can be achieved. In addition, the leg assembly 200 itself can 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 relative to each other to fold, thereby further facilitating the effect of occupying less space after the vehicle is folded through the folding structure of the leg assembly 200 itself.

[0043] The vehicle in the utility model also 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 the wheel assembly 300 is installed and the leg assembly 200 is in an 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. 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.

[0044] In the folded state, at least part of the leg assembly 200 can be accommodated on the side of the seat frame 100 away from the support 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 support surface 110, only part of the leg assembly 200 can be accommodated on the side of the seat frame 100 away from the support surface 110, or all of the leg assembly 200 can be accommodated on the side of the seat frame 100 away from the support surface 110; when at least part of the wheel assembly 300 is accommodated on the side of the seat frame 100 away from the support surface 110, only part of the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the support surface 110, or all of the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the support 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 support 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 support 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 support surface 110.

[0045] When at least part of the leg assembly 200 can be accommodated on the side of the seat frame 100 away from the support 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 support surface 110, thereby achieving the effect of accommodating the leg assembly 200 to the side of the seat frame 100 away from the support surface 110, and reducing the volume of the entire carrier in the direction perpendicular to the support 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 can be accommodated on the side of the seat frame 100 away from the support surface 110.

[0046] When at least part of the wheel assembly 300 can be accommodated on the side of the seat frame 100 away from the support surface 110 , the wheel assembly 300 can be detachable relative to the leg assembly 200 , so that the wheel assembly 300 can be detached and installed on the side of the seat frame 100 away from the support surface 110 .

[0047] Further, the seat frame 100 is formed with a receiving space 120 on a side away from the support surface 110. Specifically, the seat frame 100 includes a seat plate, one side of which forms the support surface 110, and the receiving space 120 can be formed by providing a groove on the side of the seat plate away from the support surface 110. Alternatively, the receiving 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 receiving space 120 can be a rectangular space, a circular space or a space of other shapes. The receiving space 120 can be a large space that is connected as a whole, or it can include a plurality of independent sub-spaces, so that each sub-space can accommodate different components respectively. Among them, part of the leg assembly 200 and the wheel assembly 300 are accommodated in the receiving space 120; or all the leg assembly 200 and all the wheel assembly 300 are accommodated in the receiving space 120. The accommodating space 120 may include sub-spaces for accommodating the leg assembly 200 and the wheel assembly 300, respectively. The two sub-spaces may be independent of each other or may be interconnected. The two sub-spaces may be arranged adjacent to each other, or may be arranged to surround each other. By forming the accommodating space 120 on the side of the seat frame 100 away from the support surface 110, and at least part of the leg assembly 200 and the wheel assembly 300 are accommodated in the accommodating space 120, on the one hand, the protective effect of the wall of the accommodating space 120 on the leg assembly 200 and the wheel assembly 300 can be improved, and the appearance of the folded vehicle can be made neater; on the other hand, the space occupied by the vehicle in the thickness direction (i.e., the direction perpendicular to the support surface 110) in the folded state is reduced.

[0048] The technical solution of the utility model is to connect the leg assembly 200 to the seat frame 100 by rotation, so that the end of the leg assembly 200 close to the seat frame 100 can rotate relative to the seat frame 100, and the end of the leg assembly 200 not connected to the seat frame 100 can rotate in the direction close to the seat frame 100, thereby achieving the folding effect of the leg assembly 200, so that the carrier has a folding function and is convenient for storage. Alternatively, the end of the leg assembly 200 not connected to the seat frame 100 rotates in the direction away from the seat frame 100 to achieve the unfolded state of the leg assembly 200, so as to support the seat frame 100. In addition, by installing the wheel assembly 300 on the leg assembly 200, the vehicle can realize the movement of the seat frame 100 by rolling the wheel assembly 300, thereby reducing the friction of the vehicle relative to the ground and saving the driving force when pushing the vehicle to move. By placing the leg assembly 200 in a folded state and at least partially accommodating the leg assembly 200 in the accommodating space 120, the protective effect of the wall of the accommodating space 120 on the leg assembly 200 can be improved, and the appearance of the folded vehicle can be made neater. By detachably connecting the wheel assembly 300 to the leg assembly 200, the wheel assembly 300 can be separated from the leg assembly 200 after being disassembled, which makes it easy to replace the wheel assembly 300, and also makes it easy to place the wheel assembly 300 in the space enclosed by the leg assembly 200 after being disassembled, so as to make full and reasonable use of the accommodating space 120. Therefore, when the leg assembly 200 is in a folded state, the wheel assembly 300 occupies less space in the direction parallel to the support surface 110 of the seat frame 100, thereby improving the space utilization rate and reducing the area of ​​the support surface 110.

[0049] In one embodiment, if Figure 2 or Figure 4 As shown, the wheel assembly 300 is plugged or snap-connected with the end of the leg assembly 200 away from the seat frame 100 .

[0050] By plugging or snapping the wheel assembly 300 with the end of the leg assembly 200 away from the seat frame 100, the wheel assembly 300 can be quickly installed on the leg assembly 200 or quickly removed from the leg assembly 200, thereby improving the efficiency of assembly and disassembly of the wheel assembly 300, and further improving the efficiency of folding and storage of the vehicle in the utility model. Specifically, one of the wheel assembly 300 and the leg assembly 200 is provided with a plug-in hole, and the other is provided with a plug-in column, which is inserted into the plug-in hole, so as to achieve the plug-in effect of the wheel assembly 300 and the leg assembly 200. Specifically, the wheel assembly 300 and the leg assembly 200 can be plugged in a direction perpendicular to the ground, or in a direction parallel to the ground. Alternatively, when the wheel assembly 300 is engaged with the leg assembly 200, one of the wheel assembly 300 and the leg assembly 200 is provided with a buckle, and the other one is provided with a latching hole, and the buckle is inserted into the latching hole, thereby achieving the latching effect of the wheel assembly 300 and the leg assembly 200.

[0051] Of course, in other examples, the wheel assembly 300 and the leg assembly 200 can also be detachably connected by means of screw connection, magnetic connection, etc.

[0052] In one embodiment, the wheel assembly 300 has a rolling axis. When the wheel assembly 300 is accommodated in the accommodating space 120, the rolling axis is arranged parallel to the support surface 110; or the rolling axis is arranged at an angle to the support surface 110 (such as Figure 3 or Figure 4 shown).

[0053] When the rolling axis is arranged parallel to the support surface 110 when the wheel assembly 300 is accommodated in the accommodating space 120, the wheel assembly 300 can occupy less space in the direction parallel to the support surface 110, thereby reducing the space occupied by the carrier in the direction parallel to the support surface 110. At this time, the axis of the rolling axis can be arranged parallel to the rotation axis of the leg assembly when it rotates relative to the seat frame 100. Specifically, in order to achieve the effect that the rolling axis of the wheel assembly 300 is arranged parallel to the support surface 110 in the folded state, the rotation axis of the leg assembly 200 when it rotates 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 it rotates 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 it rotates relative to the seat frame 100 also extends in the front-back direction.

[0054] When the wheel assembly 300 is accommodated in the accommodation space 120, the rolling axis and the support surface 110 are arranged at an angle, which means that the rolling axis and the support surface 110 form an angle 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 arranging the rolling axis and the support surface 110 at an angle in the folded state, the rolling wheel of the wheel assembly 300 is closer to the state parallel to the support surface 110, so that the space occupied by the wheel assembly 300 in the thickness direction can be reduced, and the carrier is more conducive to achieving the effect of flattening storage.

[0055] Furthermore, if Figure 3 or Figure 4 As shown, when the wheel assembly 300 is accommodated in the accommodating space 120 , the rolling axis is vertically arranged to the supporting surface 110 .

[0056] By arranging the rolling axis perpendicularly to the support surface 110, the surface of the wheel assembly 300 perpendicular to the rolling axis is arranged parallel to the support 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.

[0057] In one embodiment, at least one wheel assembly 300 is a universal wheel assembly 300 .

[0058] 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 support surface 110, so that the surface of the vertical rolling axis of the wheel assembly 300 can be parallel to the support 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.

[0059] 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 .

[0060] 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.

[0061] 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.

[0062] 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 support surface 110, but the rolling axis of the wheel assembly 300 is arranged at an angle to the support 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.

[0063] 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 support 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.

[0064] In one embodiment, if Figure 4 As shown, the accommodating space 120 includes a first placement area 121 and a second placement area 122 arranged around the first placement area 121. The first placement area 121 is used to accommodate the wheel assembly 300, and the second placement area 122 is used to accommodate the leg assembly 200.

[0065] It is understandable that in order to maintain the stability of the vehicle after unfolding, a plurality of leg assemblies 200 are usually provided, and the plurality of leg assemblies 200 are independently distributed in a ring or a rectangle, so as to ensure that the plurality of leg assemblies 200 have the effect of jointly stably supporting the seat frame 100. When the leg assembly 200 is folded, it does not completely occupy the accommodating space 120, and there is still an empty space at the center position after it is folded.

[0066] By providing the accommodation space 120 with a first placement area 121 and a second placement area 122 arranged around the first placement area 121, the first placement area 121 is used to accommodate the wheel assembly 300, and the second placement area 122 is used to accommodate the leg assembly 200, the accommodation space 120 can be fully utilized, so that the various parts of the folded vehicle are more compact, and the situation where the wheel assembly 300 is placed on the outer ring of the first placement area 121 to increase the volume of the vehicle can be avoided. In this embodiment, the various parts of the vehicle have their own appropriate positions and layouts after folding, so that the vehicle saves space in the direction parallel to the support surface 110.

[0067] In one embodiment, if Figure 3 or Figure 4 As shown, at least two groups of wheel assemblies 300 are provided. When the wheel assemblies 300 are accommodated in the accommodating space 120 , the projections of at least two groups of wheel assemblies 300 on the supporting surface 110 at least partially overlap.

[0068] By arranging the projections of at least two sets of wheel assemblies 300 on the support surface 110 to at least partially overlap, the space occupied by the wheel assemblies 300 in the direction parallel to the support surface 110 can be reduced, thereby reducing the volume of the seat frame 100 and further reducing the space occupied by the vehicle in the direction parallel to the support surface 110 after being folded.

[0069] In one embodiment, if Figure 4 As shown, a positioning structure or a limiting structure 400 is provided on the side of the seat frame 100 facing away from the support surface 110 . In the folded state, the wheel assembly 300 is positioned on the seat frame 100 by the positioning structure or the limiting structure 400 .

[0070] By providing a positioning structure or a limiting structure 400 on the side of the seat frame 100 away from the support surface 110, and the wheel assembly 300 is positioned on the seat frame 100 by the positioning structure or the limiting structure 400 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.

[0071] In one embodiment, if Figure 4 As shown, a limiting structure 400 is provided in the accommodating space 120 , and the wheel assembly 300 includes a first wheel assembly 310 ; when the first wheel assembly 310 is accommodated in the accommodating space 120 , the first wheel assembly 310 is radially limited by the limiting structure 400 .

[0072] The radial direction refers to the radial direction of the first wheel assembly 310. By providing the limiting structure 400, the limiting 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.

[0073] Specifically, the limiting 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 radially limit the first wheel assembly 310. Alternatively, the limiting 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 radially limit the first wheel assembly 310. Alternatively, the limiting 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.

[0074] In one embodiment, the limiting structure 400 has at least two limiting areas, and the at least two limiting areas are arranged in a direction parallel to the supporting surface 110 so that at least two first wheel assemblies 310 can be respectively accommodated in the limiting areas.

[0075] By forming the limiting structure 400 with at least two limiting areas, at least two limiting areas 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, 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.

[0076] Specifically, in order to make the limiting structure 400 have at least two limiting areas, the limiting structure 400 can be an S-shaped positioning plate, and the S-shaped positioning plate forms two mutually symmetrical limiting areas, so that the two first wheel assemblies 310 can be symmetrically arranged in the two limiting areas, 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 limiting structure 400 is simpler and convenient for molding and manufacturing. Of course, in other examples, the limiting 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 limiting structure 400 can also be composed of a plurality of positioning columns arranged in an S shape, etc.

[0077] In one embodiment, if Figure 4As shown, the accommodating space 120 is provided with a fixing structure 500 ; the wheel assembly 300 further includes a second wheel assembly 320 ; when the second wheel assembly 320 is accommodated in the accommodating space 120 , the second wheel assembly 320 is fixedly mounted on the fixing structure 500 .

[0078] 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 a fixing structure 500, the second wheel assembly 320 is installed on the fixing structure 500, thereby achieving the stability of the second wheel assembly 320 after being stored.

[0079] Specifically, the fixing structure 500 can limit the second wheel assembly 320 only in the radial direction of the second wheel assembly 320, or the fixing structure 500 can limit the second wheel assembly 320 in both the radial and axial directions. When the fixing structure 500 only limits the second wheel assembly 320 in its radial direction, the fixing 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 fixing 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 fixing 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 fixing structure 500 limits the radial and axial directions of the second wheel assembly 320, the fixing structure 500 can be a buckle, a buckle hole, a screw hole or a screw column, etc., and the second wheel assembly 320 is provided with a buckle hole, a buckle, a screw column or a screw hole, etc. Alternatively, the fixing 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 fixing structure 500. It should be noted that the above examples of the fixing structure 500 can be combined with each other or used separately.

[0080] In one embodiment, if Figure 4 As shown, the fixing structure 500 is a fixing column, and the second wheel assembly 320 has a shaft hole; when the second wheel assembly 320 is accommodated in the accommodating space 120, the shaft hole and the fixing column are interference-fitted or snap-fitted.

[0081] By fixing the fixing column in the rotating shaft hole, the second wheel assembly 320 can be installed in the fixed structure 500 in a stable state through the relative 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 when the rotating shaft hole of the second wheel assembly 320 is threadedly connected with the fixing column, the second wheel assembly 320 can be in a stable state. 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 by interference fit.

[0082] In this example, the rotating shaft hole and the fixing column are interference fit or snap-fitted.

[0083] By providing interference fit between the rotating shaft hole and the fixing column, the operation of installing the second wheel assembly 320 on the fixing 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.

[0084] When the shaft hole is engaged with the fixed column, a buckle structure may be provided at one end of the fixed column away from the seat frame 100, so that when the second wheel assembly 320 is installed on the fixed column, the shaft hole of the second wheel assembly 320 is aligned with the fixed column and sleeved on the fixed column, so that the buckle structure is engaged with the shaft hole, and the effect of installing the second wheel assembly 320 on the fixed structure 500 can be achieved. By engaging the shaft hole with the fixed column, the operation of installing the second wheel assembly 320 on the fixed structure 500 can also be made simpler, thereby improving the installation efficiency.

[0085] In another example, after the shaft hole of the second wheel assembly 320 is plugged into the fixed column, a wedge is inserted between the inner wall of the shaft hole and the fixed column to clamp the second wheel assembly 320 on the fixed structure 500, thereby ensuring that the second wheel assembly 320 and the fixed structure 500 are in a relatively stable state.

[0086] Of course, in other embodiments, the fixing 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 embodiment, if Figure 3 or Figure 4 As shown, the wheel assembly 300 includes a first wheel assembly 310 and a second wheel assembly 320 , and the second wheel assembly 320 is at least partially disposed on a side of the first wheel assembly 310 facing away from the support surface 110 .

[0088] By such arrangement, the space occupied by the wheel assembly 300 in the direction parallel to the support 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 support surface 110 will not be too large, and the volume of the seat frame 100 can be set to be 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 so that the second positioning structure can limit the second wheel assembly 320 in both the axial and radial directions, when the second wheel assembly 320 is at least partially arranged on the side of the first wheel assembly 310 away from the support 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 support 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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 support 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.

[0093] In one embodiment, please refer to Figures 5 to 8 The carrier also includes a push handle rod assembly 600 connected to the seat frame 100, and the push handle rod assembly 600 has an unfolded state and a folded state.

[0094] By providing the push handle rod assembly 600, a gripping position for pushing the carrier is provided for the user, so that the user can push the carrier easily. By providing the push handle rod assembly 600 with an unfolded state and a folded state, that is, the push handle rod assembly 600 can be unfolded and folded 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 carrier after being folded less.

[0095] 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.

[0096] 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 support surface 110, thereby reducing the occupied space in the thickness direction and the direction parallel to the support 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 support 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 support surface 110 and the direction perpendicular to the support surface 110.

[0097] In another example, the push rod assembly 600 may include at least two spaced support rods 610, 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 sections of rod bodies 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 may be retracted to a shorter state first, and then the support rods 610 may be removed from the seat frame 100, or the support rods 610 may 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 support surface 110, and the folded support rods 610 are arranged parallel to the support surface 110, thereby reducing the occupied space in the thickness direction and the direction parallel to the support 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 support surface 110, and the folded support rod 610 is arranged parallel to the support surface 110, thereby reducing the occupied space of the carrier in the thickness direction and the direction parallel to the support surface 110 after folding. Specifically, a slot for clamping can be provided on the side of the seat frame 100 away from the support surface 110, and the disassembled support rod 610 can be clamped into the slot.

[0098] In one embodiment, the carrier further includes a backrest assembly and a push handle bar assembly 600 connected to the seat frame 100 , and the backrest assembly is connected to the push handle bar assembly 600 or the seat frame 100 .

[0099] 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 where it is set at an angle with the support 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.

[0100] 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 support surface 110, the backrest assembly also rotates with the support rod 610 to move closer to the support 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.

[0101] 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 comprises: A seat frame, the seat frame having a support surface and a receiving space formed on a side away from the support surface; A leg assembly, the leg assembly is rotatably connected to the seat frame and has an unfolded state and a folded state; in the folded state, at least a portion of the leg assembly is accommodated in the accommodating space; and At least one wheel assembly, at least one of the wheel assemblies is detachably connected to the leg assembly, and the wheel assembly can be accommodated in the accommodating space in a detached state.

2. The carrier according to claim 1, characterized in that: The wheel assembly is plugged or clamped with one end of the leg assembly away from the seat frame.

3. The carrier according to claim 1, characterized in that: The wheel assembly has a rolling axis. When the wheel assembly is accommodated in the accommodating space, the rolling axis is arranged in parallel with the supporting surface; or, the rolling axis is arranged at an angle with the supporting surface.

4. The carrier according to claim 1, characterized in that: The wheel assemblies are provided with at least two groups. When the wheel assemblies are accommodated in the accommodating space, the projections of at least two groups of the wheel assemblies on the supporting surface at least partially overlap.

5. The carrier according to claim 1, characterized in that: The accommodating space includes a first placement area and a second placement area arranged around the first placement area, the first placement area is used for accommodating the wheel assembly, and the second placement area is used for accommodating the leg assembly.

6. The carrier according to claim 1, characterized in that: A limiting structure is provided in the accommodating space, and the wheel assembly includes a first wheel assembly; when the first wheel assembly is accommodated in the accommodating space, the first wheel assembly is radially limited by the limiting structure.

7. The carrier according to claim 1, characterized in that: The accommodating space is provided with a fixing structure; the wheel assembly further comprises a second wheel assembly; when the second wheel assembly is accommodated in the accommodating space, the second wheel assembly is installed on the fixing structure.

8. The carrier according to claim 7, characterized in that: The fixing structure is a fixing column, and the second wheel assembly has a rotating shaft hole; when the second wheel assembly is accommodated in the accommodating space, the rotating shaft hole and the fixing column are interference-fitted or clamped.

9. The carrier according to claim 1, 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; 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.

10. The carrier according to any one of claims 1 to 9, characterized in that: The carrier also includes a push handle rod assembly connected to the seat frame, and the push handle rod assembly has an unfolded state and a folded state; And / or, the carrier further comprises 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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