Wheelset mechanism and stroller

Abstract

The application belongs to the technical field of baby carriers, and particularly relates to a wheel set mechanism and a baby stroller. The wheel set mechanism comprises a guide assembly, a first locking assembly and a wheel assembly. The guide assembly is arranged on a frame body and extends along a first direction of the frame body. The first locking assembly is movably arranged on the guide assembly and can move along a second direction of the frame body. The second direction is arranged at an angle with the first direction. The wheel assembly is movably arranged on the guide assembly. The wheel assembly can be locked at a first position of the guide assembly in a locked state of the first locking assembly, or can move to a second position of the guide assembly along the first direction in an unlocked state of the first locking assembly. The second position is located on the inner side of the first position. The application can effectively reduce the occupied space, and the whole operation does not need to disassemble any component. The stability during use is maintained, and the storage convenience and user experience are significantly improved.

Description

Technical Field

[0001] This application belongs to the field of infant vehicle technology, specifically relating to a wheel assembly mechanism and an infant stroller. Background Technology

[0002] Baby strollers, as a common means of carrying and transporting infants and toddlers, typically include a frame, wheels at the bottom of the frame, and a seat for carrying the child. They move flexibly through the rolling of the wheels, providing great convenience for parents traveling with their children and are widely used in various scenarios such as daily leisure and shopping.

[0003] Currently, baby strollers on the market typically use wide wheels to improve stability, resulting in a larger footprint when folded, making them inconvenient to store and transport. Some products use detachable wheels, but this method is cumbersome, and there is a risk of losing the removed wheels, leading to a poor user experience. Utility Model Content

[0004] The purpose of this application is to provide a wheel assembly mechanism and a baby stroller that allows the wheels to be moved laterally and folded together. This enables the wheels to be quickly folded inwards during storage, effectively reducing space occupation. The entire operation does not require disassembling any parts, thus maintaining stability during use and significantly improving storage convenience and user experience.

[0005] This application provides a wheelset mechanism, comprising: a guide assembly disposed on a frame body and extending along a first direction of the frame body; a first locking assembly movably disposed on the guide assembly and movable along a second direction of the frame body, wherein the line containing the second direction forms an angle with the line containing the first direction; and a wheel assembly movably disposed on the guide assembly; wherein the wheel assembly can be locked at a first position on the guide assembly when the first locking assembly is locked, or can move along the first direction to a second position on the guide assembly when the first locking assembly is unlocked, the second position being located inside the first position.

[0006] In one exemplary embodiment of this application, the guiding component includes a guide member and a limiting and fixing member. The limiting and fixing member is connected to the frame body, and the guide member is connected to the limiting and fixing member and extends along the first direction. The wheel assembly is movably sleeved on the guide member, and the first locking component is movably disposed on the side of the guide member close to the limiting and fixing member.

[0007] In one exemplary embodiment of this application, the guide includes a first guide rod and a second guide rod, the first guide rod and the second guide rod being spaced apart from each other and arranged parallel to each other in the second direction.

[0008] In one exemplary embodiment of this application, the wheel assembly is provided with a groove, the limiting fastener includes a fixed connection part and a limiting part, the fixed connection part is connected to the frame body, the limiting part is disposed on the fixed connection part and extends toward the wheel assembly, so that it can be fitted into the groove in the first position; the guide is connected to the fixed connection part.

[0009] In one exemplary embodiment of this application, the wheel assembly mechanism further includes a stop member, which protrudes from the guide member and is located inside the first position.

[0010] In one exemplary embodiment of this application, the wheel assembly further includes a second locking component disposed near the stop member, the second locking component being movably disposed on the guide member and movable along the second direction.

[0011] In one exemplary embodiment of this application, the first locking component includes an elastic element and a locking element. The elastic element is disposed inside the guide component, and the locking element is connected to the elastic element and can partially extend out of the guide component.

[0012] In one exemplary embodiment of this application, the wheel assembly includes a connecting sleeve and a wheel, the connecting sleeve being movably connected to the guide assembly, and the wheel being detachably connected to the connecting sleeve.

[0013] In one exemplary embodiment of this application, the wheel includes a wheel body, a connecting part, and a brake part that are stacked and coaxially hinged. The connecting part is detachably connected to the connecting sleeve, and the brake part is located on the inner side of the wheel.

[0014] A second aspect of this application provides a baby stroller, including a frame body and a wheel assembly as described in any of the preceding claims, the wheel assembly being located below the frame body.

[0015] The wheel mechanism and stroller proposed in this application have at least the following beneficial effects: The wheel assembly mechanism of this application includes a guide assembly, a first locking assembly, and a wheel assembly. The guide assembly is located on the frame body and extends along a first direction of the frame body. The first locking assembly is movably located on the guide assembly and can move along a second direction of the frame body, with the line of the second direction forming an angle with the line of the first direction. The wheel assembly is movably located on the guide assembly. When the first locking assembly is locked, the wheel assembly can be locked in a first position on the guide assembly, or when the first locking assembly is unlocked, it can move along the first direction to a second position on the guide assembly, with the second position located inside the first position. Thus, by setting up the guide assembly, the first locking assembly, and the wheel assembly, the wheel assembly can move from the first position on the outside to the second position on the inside along the guide assembly in the unlocked state, thereby achieving lateral folding of the wheel assembly. This structure allows the wheel assembly to be quickly folded inward without disassembling the wheels during folding and storage, effectively reducing the overall width and space occupied, while also reducing the loss of parts and storage inconvenience caused by disassembling the wheel assembly, significantly improving the storage convenience and user experience of the stroller.

[0016] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part by practice of this application.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1 This illustration shows a three-dimensional structural diagram of a baby stroller provided in an embodiment of this application.

[0020] Figure 2 A schematic diagram of the wheel assembly in its folded state, as shown in an embodiment of this application, is illustrated.

[0021] Figure 3 The diagram shows an exploded view of the limiting and guiding components provided in an embodiment of this application.

[0022] Figure 4 This illustration shows a structural diagram of the limiting and guiding components as disassembled from another perspective, according to an embodiment of this application.

[0023] Figure 5A cross-sectional structural diagram of the elastic element provided in this application, located inside the second guide rod, is shown.

[0024] Figure 6 An exploded view of the wheel and connecting sleeve provided in an embodiment of this application is shown.

[0025] Figure 7 It shows Figure 6 An enlarged schematic diagram of the first locking component at point A being engaged in the card hole.

[0026] Figure 8 A schematic diagram of the structure of the baby stroller provided in the embodiment of this application in the folded state is shown.

[0027] Explanation of reference numerals in the attached figures: 10. Baby stroller; 100. Wheel assembly; 110. Guide assembly; 111. Guide member; 1110. First guide rod; 1111. Second guide rod; 112. Limiting and fixing member; 1120. Connecting hole; 1121. Extending rod; 1122. Fixed connection part; 1123. Limiting part; 120. First locking assembly; 121. Elastic member; 122. Locking member; 130. Wheel assembly; 131. Groove; 132. Connecting sleeve; 1320. Groove; 1321. Locking hole; 133. Wheel; 1330. Wheel body; 1331. Connecting part; 1332. Brake part; 140. Stopper; 200. Frame body; X, first direction; Y, second direction. Detailed Implementation

[0028] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0029] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0032] This application provides a wheel assembly mechanism 100, which can reduce the problems in related technologies, such as the large space occupied by the wide wheel assembly after the baby stroller 10 is folded, and the cumbersome operation and easy loss of parts of the detachable wheel assembly, by using the laterally foldable wheel assembly 130.

[0033] Among them, see Figure 1 As shown, the wheel assembly 100 may include a guide assembly 110, a first locking assembly 120, and a wheel assembly 130. The guide assembly 110 is located below the frame body 200 and extends along a first direction X of the frame body 200. The first locking assembly 120 is movably disposed on the guide assembly 110 and can move along a second direction Y of the frame body 200, the line containing the second direction Y forming an angle with the line containing the first direction X. The wheel assembly 130 is movably disposed on the guide assembly 110, and when the first locking assembly 120 is locked, it can be locked in a first position (i.e., the unfolded position) of the guide assembly 110, or when the first locking assembly 120 is unlocked, it can move along the first direction X to a second position (i.e., the folded position) of the guide assembly 110, the second position being located inside the first position, that is, closer to the longitudinal plane of the center of the trolley.

[0034] It should be noted that the first direction X can be the left-right direction of the stroller 10. The second direction Y can be set to be tilted at an angle relative to the vertical direction.

[0035] Understandably, by moving the wheel assembly 130 laterally along the guide assembly 110, the overall width of the wheel set is significantly reduced when folded, greatly improving the space utilization of the trolley during storage and making it easier to fit into a car trunk or meet the size requirements for air transport. Furthermore, the entire folding and unfolding process requires no disassembly of any parts; it can be completed with simple pressing and pushing operations. This not only makes operation convenient, time-saving, and labor-saving, but also fundamentally reduces the risk of losing parts due to wheel assembly disassembly, and eliminates the problem of disassembly wheels causing dirt to other items. In addition, the structure remains stable in the unfolded state thanks to the reliable first locking assembly 120, ensuring safety and stability during pushing, achieving an optimal balance between convenient storage and reliable use.

[0036] In some embodiments, see Figure 1 and Figure 2 As shown, the guide assembly 110 includes a guide member 111 and a limiting fastener 112. The limiting fastener 112 is fixedly connected to the frame body 200 through mounting holes thereon. For example, the rear leg tubes of the stroller 10 are inserted into the mounting holes in the limiting fastener 112 along the second direction Y for fixed connection. The guide member 111 is fixedly connected to the limiting fastener 112 and extends along the first direction X. The wheel assembly 130 is movably sleeved on the guide member 111, allowing the wheel assembly 130 to slide along the guide member 111. A first locking assembly 120 is movably disposed at one end of the guide member 111 near the limiting fastener 112.

[0037] Understandably, by fixing the limiting fastener 112 to the frame body 200 as an independent connecting part 1331 and fixing the guide 111 to the limiting fastener 112, a stable and reliable installation foundation is constructed. This ensures a solid connection between the wheel assembly 100 and the whole vehicle, and makes the wheel assembly 130 slide more smoothly and accurately along the guide 111. At the same time, the first locking component 120 is located at the end of the guide 111 near the limiting fastener 112, making the locking more direct and reliable when in the unfolded position. Thus, while effectively reducing the width when folded, the structural rigidity and stability of the trolley in use are ensured.

[0038] In some embodiments, see Figure 1 and Figure 2 As shown, the guide member 111 may include a first guide rod 1110 and a second guide rod 1111. The first guide rod 1110 and the second guide rod 1111 are spaced apart from each other and are arranged parallel to each other in the second direction Y. This dual guide rod structure provides a more stable and reliable guiding support for the wheel assembly 130, effectively preventing the wheel assembly 130 from shaking or getting stuck during movement, and ensuring the smoothness of the retraction and unfolding actions.

[0039] It is understood that the implementation of the guide component 110 is not limited to this. For example, in another embodiment, the guide component 111 can be designed as a single non-circular cross-section sliding rod (such as a rectangular, elliptical, or irregularly shaped rod with a guide plane), which can cooperate with the corresponding irregularly shaped hole in the wheel assembly 130, and can also play the role of anti-rotation and guidance. Alternatively, the guide component 111 can also adopt the form of a guide rail and a slider, with the guide rail fixed on the frame body 200 and the slider integrated on the wheel assembly 130.

[0040] In some embodiments, both the first guide rod 1110 and the second guide rod 1111 are hollow structures. This hollow design effectively reduces the overall weight and lowers material costs while ensuring sufficient structural strength.

[0041] In some embodiments, see Figure 3 and Figure 4 As shown, the first guide rod 1110 is shorter than the second guide rod 1111 in the first direction X. The limiting and fixing member 112 has a connecting hole 1120 and an extension rod 1121 extending along the first direction X on the side near the guide member 111, and the connecting hole 1120 and the extension rod 1121 are arranged sequentially in the second direction Y. During assembly, the extension rod 1121 can be inserted into the hollow interior of the first guide rod 1110, while the second guide rod 1111 can be inserted into the connecting hole 1120. Thus, through the cooperation of the extension rod 1121 and the connecting hole 1120, precise spatial positioning and reliable fixing of the first guide rod 1110 and the second guide rod 1111 with the limiting and fixing member 112 are achieved, forming a stable multi-point connection, significantly enhancing the overall structural rigidity and torsional strength of the guide assembly 110. Moreover, this structural design also optimizes and disperses the load transmission path from the wheel assembly 130, improving load-bearing stability. In addition, this modular plug-in structure greatly simplifies the assembly process, ensures production consistency and efficiency, and makes the overall structure more compact and reliable.

[0042] In some embodiments, see Figure 4 As shown, the wheel assembly 130 has a slot 131. The limiting and fixing member 112 includes a fixing connection part 1122 and a limiting part 1123. The fixing connection part 1122 is connected to the frame body 200, and the limiting part 1123 extends from the fixing connection part 1122 toward the wheel assembly 130. When the wheel assembly 130 is in the first position, the limiting part 1123 can fit precisely into the slot 131 of the wheel assembly 130. This fitting structure ensures that the wheel assembly 130 and the limiting and fixing member 112 are tightly engaged in the unfolded state, significantly improving the structural rigidity and stability of the wheel assembly mechanism 100 during load-bearing and pushing.

[0043] It is understood that the fixed connection part 1122 is provided with the mounting hole, the connection hole 1120 and the extension rod 1121 described above, and the first guide rod 1110 and the second guide rod 1111 are fixedly connected to the fixed connection part 1122.

[0044] In some embodiments, see Figure 1 and Figure 2 As shown, to precisely define the retracted position of the wheel assembly 130, the wheel assembly mechanism 100 also includes a stop member 140. The stop member 140 protrudes from the guide member 111 and is located inside the first position. When the user pushes the wheel assembly 130 inward, the wheel assembly 130 eventually comes into contact with the stop member 140, at which point the wheel assembly 130 reaches the second position, effectively preventing over-retraction.

[0045] For example, the stop member 140 can be a columnar protrusion located on the outer wall of the first guide rod 1110 and protruding toward the second guide rod 1111. This protrusion can be integrally formed with the first guide rod 1110 or fixed to the first guide rod 1110 as a separate part. When the wheel assembly 130 slides inward along the guide member 111, its inner end face contacts and is blocked by the side of this protrusion, thus precisely limiting it to the second position. This design, protruding toward the second guide rod 1111, allows the stop member 140 to act more directly on the wheel assembly 130 sliding between the two guide rods. This not only ensures accurate positioning and effectively reduces interference between the two wheels 133 when they are retracted, but also protects them from damage caused by external collisions or accidental contact because they are located between the guide rods. It also simplifies the overall structure of the guide rods and facilitates manufacturing.

[0046] In addition to the raised stop member 140, the stop function can also be implemented by other structures in other embodiments, such as providing a through pin hole on the guide member 111 and inserting a limiting pin, or machining an annular limiting groove 1320 on the guide member 111.

[0047] It should be noted that the position of the stop 140 can be adjusted according to the required retraction width, and it does not necessarily have to be set at the absolute center of the guide 111.

[0048] In some embodiments, the wheel assembly 100 may further include a second locking component. The second locking component is disposed near the stop 140 and movably mounted on the guide 111, and is also movable in the second direction Y. When the wheel assembly 130 moves to the second position abutting against the stop 140, the user can operate the second locking component to lock it in that position, thereby preventing the wheel assembly 130 from accidentally slipping out in the folded state, improving safety when storing and moving the folded trolley. The structure of the second locking component may be the same as or similar to the first locking component 120, or other suitable locking structures may be used, such as buckles, knobs, etc., and its specific location may be inside the stop 140 or integrated into the stop 140.

[0049] In some embodiments, see Figure 5 and Figure 6 As shown, the first locking assembly 120 may include an elastic element 121 and a locking element 122. The elastic element 121 may be a structure such as a compression spring or a leaf spring, and it may be disposed in the internal cavity of the guide element 111. The locking element 122 is connected to the elastic element 121, and under the preload of the elastic element 121, a portion of its structure may extend out of the surface of the guide element 111 or the corresponding locking hole 1321, thereby engaging with the corresponding locking hole 1321 on the wheel assembly 130 to achieve locking.

[0050] This tilted design in the second direction Y (i.e., the operating direction of the first locking component 120) is more ergonomic, making the direction of finger force application more natural and comfortable for users, whether standing or bending over. At the same time, the tilted design also makes better use of the internal space of the stroller's foot area, providing more flexibility in the arrangement of the locking mechanism and effectively avoiding other components such as brake cables.

[0051] The locking mechanism is not limited to a button type. In other embodiments, a rotary latch type locking can also be used; for example, rotating a knob on the wheel assembly 130 or guide 111 drives the locking tongue to engage or disengage with the slot via a cam surface or inclined plane mechanism. Alternatively, a slider type locking can be used; a lever on the wheel assembly 130 slides laterally, driving the locking pin to insert or retract into the locking hole on the guide 111 via a linkage mechanism. In addition, magnetic adsorption can also be used as an auxiliary or primary locking method, for example, by providing mutually attractive magnets on the wheel assembly 130 and the limiting fixing member 112, which automatically adsorb and position themselves when reaching a first position.

[0052] In some embodiments, the elastic element 121 and the locking element 122 can be separately molded. For example, the locking element 122 can be an independent button, and the elastic element 121 can be an independent compression spring or sheet. This separate design facilitates the optimization of materials for individual components. The locking element 122 can be made of high-strength engineering plastics to ensure wear resistance, while the elastic element 121 can be made of stable spring steel. It also facilitates later maintenance and replacement.

[0053] In other embodiments, the elastic element 121 and the locking element 122 may also be designed as a single integral structure, for example, by injection molding or bending from a flexible plastic or metal material. This integrated structure reduces the number of parts, simplifies the assembly process, lowers production costs, and avoids the risk of connection failure that may exist in separate structures.

[0054] Both of these methods can achieve reliable locking functionality, and the choice can be made based on specific production conditions and usage requirements.

[0055] In some embodiments, see Figure 6 As shown, a wheel assembly 130 is respectively provided on the left and right sides of the first guide rod 1110 and the second guide rod 1111, forming a symmetrically distributed wheel structure. This symmetrical layout provides the trolley with better stability when unfolded, and when folded, the wheels 133 on both sides can move towards the center synchronously, achieving balanced spatial compression. Each wheel assembly 130 is fitted onto the first guide rod 1110 and the second guide rod 1111, and can slide along the first guide rod 1110 and the second guide rod 1111, ensuring the independent movement of each component while ensuring the consistency of the overall structure through the shared guide assembly 110.

[0056] In some embodiments, see Figure 6 As shown, the wheel assembly 130 includes a connecting sleeve 132 and a wheel 133. The connecting sleeve 132 is movably connected to the first guide rod 1110 and the second guide rod 1111; for example, the connecting sleeve 132 can be configured as a sliding bearing or a structure with a lubricating bushing to reduce friction. The wheel 133 is detachably connected to the connecting sleeve 132 by means of a quick-release structure, threaded connection, or snap-fit ​​connection. This detachable design allows users to replace wheels 133 with different functions or shapes according to different usage scenarios (such as flat roads, sand, and snow), and also facilitates the repair and replacement of individual damaged wheels 133.

[0057] In some embodiments, see Figure 7As shown, the connecting sleeve 132 has a groove 1320 on the outer side of the second guide rod 1111, and a locking hole 1321 is provided in the groove 1320. The locking member 122 of the first locking assembly 120 can pass through this locking hole 1321 and cooperate with the corresponding structure on the guide member 111 to achieve locking. This design allows the head of the locking member 122 to be embedded in the groove 1320, without protruding from the outer surface of the connecting sleeve 132, effectively protecting the locking mechanism from external impact and contamination, while maintaining the flat and smooth shape of the connecting sleeve 132.

[0058] In some embodiments, see Figure 6 As shown, the wheel 133 includes a wheel body 1330, a connecting part 1331, and a brake part 1332. The wheel body 1330, the connecting part 1331, and the brake part 1332 are stacked and hinged together coaxially via a central axis. The connecting part 1331 is used to achieve a detachable connection with the connecting sleeve 132. The brake part 1332 is usually located on the inner side of the wheel 133, and it can adopt a friction type or axle-mounted type structure, achieving the braking function by the user's foot operation.

[0059] In some embodiments, see Figure 6 As shown, the bottom of the connecting sleeve 132 is constructed as a hollow cylindrical structure, into which the connecting part 1331 of the wheel 133 can be inserted. The wheel 133 is secured to the inside of the connecting sleeve 132 by a transversely penetrating screw or bolt, forming a stable built-in connection. This combination of insertion and screw locking ensures a reliable connection and force transmission between the wheel 133 and the connecting sleeve 132, simplifies the assembly process, and facilitates subsequent maintenance and wheel 133 replacement.

[0060] It should be noted that the movable connection method of the wheel assembly 130 is not limited to sliding. In another design, it can be designed as a linkage folding mechanism: the wheel assembly 130 is connected to the frame body 200 through a four-bar linkage. When folding, by triggering the release mechanism, the wheel assembly 130, driven by the linkage, moves inward and also experiences a certain degree of lifting and rotation, thereby achieving a more compact folding effect. Although the structure is slightly more complex, it achieves more extreme space saving.

[0061] The operation of the wheel assembly mechanism 100 in this embodiment is as follows: When the wheels need to be folded, the user presses the locking member 122 of the first locking assembly 120 along the inclined second direction Y, causing it to move and compress the internal elastic member 121, thereby releasing the lock on the wheel assembly 130. Subsequently, the user can push the wheel assembly 130 inward (towards the center of the trolley), and the wheel assembly 130 slides along the first guide rod 1110 and the second guide rod 1111 until it reaches the second position and abuts against the stop member 140. Figure 8As shown. During this process, the wheel assembly 130 smoothly moves from the outermost unfolded position to the inner folded position, significantly reducing the overall wheelbase. To fix the folded state, the second locking component can be operated to lock the wheel assembly 130 in the second position. When it is necessary to unfold the wheelset, first release the second locking component (if it is already locked), then pull the wheel assembly 130 outwards to slide it back to the first position along the first guide rod 1110 and the second guide rod 1111. At this time, the first locking component 120 automatically resets under the action of the elastic element 121, locking the wheel assembly 130 in the unfolded position, as shown. Figure 1 As shown. The entire process requires no tools and is simple and quick to operate.

[0062] This application also provides a baby stroller 10, which includes a frame body 200 and a wheel assembly mechanism 100 as described in any of the above embodiments. The wheel assembly mechanism 100 is located below the frame body 200 and is typically used as the rear wheel assembly. The wheel assembly mechanism 100 of this application can also be applied to the front wheel assembly of the stroller, or both the front and rear wheel assemblies can use this mechanism to achieve maximum space saving. It is understood that the baby stroller 10 typically also includes conventional structures such as a handlebar assembly, seat assembly, and armrest assembly, which will not be described in detail here.

[0063] The wheel assembly 100 and stroller 10 provided in this application achieve a significant reduction in folded volume without disassembling the wheels 133 through a clever lateral folding structure, greatly improving the convenience of storage and carrying, while reducing the risk of losing parts. The structure is stable and reliable, and the user experience is excellent.

[0064] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A wheelset mechanism, characterized by, include: A guide assembly is disposed on the main body of the vehicle frame and extends along a first direction of the main body of the vehicle frame; A first locking component is movably disposed on the guide component and is movable along a second direction of the frame body, wherein the line containing the second direction is set at an angle to the line containing the first direction; as well as A wheel assembly is movably disposed on the guide assembly; the wheel assembly can be locked in a first position on the guide assembly when the first locking assembly is locked, or can move along the first direction to a second position on the guide assembly when the first locking assembly is unlocked, the second position being located inside the first position.

2. The wheelset mechanism of claim 1, wherein, The guiding assembly includes a guide member and a limiting and fixing member. The limiting and fixing member is connected to the frame body, and the guide member is connected to the limiting and fixing member and extends along the first direction. The wheel assembly is movably sleeved on the guide member, and the first locking assembly is movably disposed on the side of the guide member close to the limiting and fixing member.

3. The wheelset mechanism of claim 2, wherein, The guide includes a first guide rod and a second guide rod, which are spaced apart from each other and arranged parallel to each other in the second direction.

4. The wheel set mechanism of claim 2, wherein, The wheel assembly has a slot, and the limiting and fixing member includes a fixing connection part and a limiting part. The fixing connection part is connected to the frame body, and the limiting part is disposed on the fixing connection part and extends toward the wheel assembly so that it can fit into the slot in the first position; the guide member is connected to the fixing connection part.

5. The wheel assembly mechanism according to claim 2, characterized in that, The wheel assembly mechanism also includes a stop member, which protrudes from the guide member and is located inside the first position.

6. The wheelset mechanism of claim 5, wherein, The wheel assembly also includes a second locking component located near the stop member. The second locking component is movably disposed on the guide member and can move along the second direction.

7. The wheel set mechanism of claim 1, wherein The first locking component includes an elastic element and a locking element. The elastic element is disposed inside the guide component, and the locking element is connected to the elastic element and can partially extend out of the guide component.

8. The wheel set mechanism of claim 1, wherein, The wheel assembly includes a connecting sleeve and a wheel, the connecting sleeve being movably connected to the guide assembly, and the wheel being detachably connected to the connecting sleeve.

9. The wheel set mechanism of claim 8, wherein, The wheel includes a wheel body, a connecting part, and a brake part that are stacked and coaxially hinged. The connecting part is detachably connected to the connecting sleeve, and the brake part is located on the inner side of the wheel.

10. A stroller, characterized in that, It includes a frame body and a wheelset mechanism as described in any one of claims 1 to 9, wherein the wheelset mechanism is located below the frame body.

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