stroller

Abstract

The invention relates to the field of human-powered vehicles, specifically to baby strollers. The proposed solution accomplishes the following tasks: on a single stroller frame, mounting one and / or two different types, sizes, weights and orientations of carrying devices to achieve extended variability, while maintaining the stroller size and ensuring its compact folding. The variability is achieved by means of three pairs of adapters arranged on the stroller frame.

Description

Technical Field

[0001] This invention relates to the field of human-powered vehicles, specifically baby strollers. Background Technology

[0002] There are now various stroller structures for carrying one or more children, which include a frame consisting of several support members (with front and rear wheels), handle support members, and various load-bearing devices.

[0003] In the use of existing strollers, the challenge of achieving a high degree of variability in the arrangement of the carrying device while maintaining the stroller's size, ease of folding and unfolding has always been a pressing issue. Many structures can only provide a few fixed seating positions or tiers, thus requiring the use of adapters, independent connectors between the carrier and the carrying device, additional intermediate frames or supports. This complicates the structure, increases the number of independent parts, and may lead to interference between the carrying devices, hindering the optimal distribution of load on the frame. Furthermore, it cannot always ensure sufficient stability and maneuverability of the stroller, especially when using heavy-duty carriers or carrying two children.

[0004] The applicant is aware of several technical solutions aimed at solving the problem, among which the following technical solutions are most similar in a set of core features.

[0005] Application WO2024030480A1, dated February 8, 2024, discloses a baby stroller including a frame comprising a front wheel support, a rear wheel support, and a handlebar support, wherein the front wheel support and the handlebar support are hinged together. The stroller frame also includes two pairs of adapters for mounting a support structure. The first pair of adapters is interconnected by pillars, slidable, has two positions, and is located between the rear wheel supports. The second pair of adapters is located directly above the front wheels or in a mounting assembly of the front wheels fixed to the exterior of the front wheel supports. A drawback of this design is that the spatially spaced arrangement of the adapters limits the variability of the support structure's arrangement. Another drawback is the structural implementation of the first pair of adapters, including the sliding mechanism, which requires high manufacturing precision for the guides and retainers, which can become soiled during use, leading to jamming or seizing. Due to wear of the fixing elements, the adapters may not be fully secured and may automatically shift under dynamic loads. Another disadvantage is the use of additional connectors to attach various load-bearing devices to the adapter, which increases the number of parts, operating steps and usage complexity, as well as the weight of the trolley.

[0006] US Patent Application No. 2014333039A1, dated November 13, 2014, discloses a baby stroller comprising a frame consisting of a front wheel support hinged to a handlebar support and a rear wheel support. The stroller frame also includes two pairs of adapters for mounting a support device. The first pair of adapters is located on the handlebar support and is non-removable, while the second pair of adapters is removable and mounted on the front wheel support at a mounting position above the front wheels. While this structure ensures greater versatility in device arrangement, it suffers from increased stroller size and complexity in installation and disassembly. Another drawback is the structural implementation and arrangement of the lower adapter pair, which increases the number of steps required to fold, unfold, and use the stroller. It also concentrates the vertical load from the support device mounted thereon precisely in the mounting area of ​​the front wheels, increasing the bending moment of the front wheel support. This necessitates reinforcement of the front of the frame, thus increasing the weight and material usage of the structure.

[0007] Application WO2021052928A1, dated March 25, 2021, discloses a baby stroller including a frame comprising a front wheel support, a rear wheel support, and a handle support connected to a telescopic handle, wherein the front wheel support and the handle support are hinged together. The stroller frame also includes two pairs of adapters for mounting a support device. The first pair of adapters is slidable and has two positions on the handle support, while the lower pair of adapters is mounted on the front wheel support and can be removable or non-removable. A drawback of this design is that the arrangement of the support device is limited due to the structural implementation and placement of the adapters. Specifically, the use of a sliding mechanism in the first pair of adapters enables movement along a guide and fixation in two positions, requiring high manufacturing precision for the sliding surface and retaining elements. During use, the guide inevitably becomes contaminated, leading to jamming or seizing, or conversely, gaps appearing in the sliding mechanism. Due to wear and tear on the fixing components, the adapter is not completely fixed in the designated position and shifts automatically during use, thereby reducing the reliability and safety of child transportation. Furthermore, by occupying space in the lower part of the frame, the lower adapter structurally restricts the variability of the load-bearing device installation, and this implementation of the adapter creates an obstacle that could trip over children and users.

[0008] Patent CN221068188U, dated June 4, 2024, discloses a baby stroller including a frame comprising a front wheel support, a rear wheel support, and a handle support connected to a telescopic handle, wherein the front wheel support and the handle support are hinged together. The stroller frame also includes two pairs of adapters for mounting a support device. A first pair of adapters is slidable on the handle support and has two positions, while a lower pair of adapters is removably connected to a position on the front wheel support for fixing the adapter, and the lower pair of adapters includes a position adjustment mechanism. A drawback of this solution is that the arrangement of the support device is limited due to the structure and arrangement of the adapters. Another significant drawback is the sliding adapter; during use, the guide can become soiled by dust, sand, fabric fibers, rainwater, etc., causing the guide to jam, seize, and develop gaps. Wear or breakage of the fixing element of the sliding mechanism can cause the adapter to be incompletely and unreliably fixed in one of its positions. Under dynamic load conditions, such as driving onto curbs, potholes, or during emergency braking, there is a risk that the adapter may automatically shift, causing it to automatically detach from its position, or that the child-carrying device may partially detach, thereby adversely affecting the overall safety of the structure.

[0009] Therefore, the trolley needs to be improved to allow for the installation of various load-bearing devices, while maintaining the trolley's dimensions and ensuring the safety of the structure as well as the ease of folding / unfolding for operation. Summary of the Invention

[0010] The present invention aims to provide a small-sized stroller that ensures increased variability by arranging different types, sizes, weights and orientations of load-bearing devices on a single plane formed by the front wheel support and the handle support, without changing the size of the stroller frame, and allows for compact folding and unfolding, thereby making the small-sized stroller suitable for carrying one or two children of different ages and weights, as well as goods or pets.

[0011] To achieve the above objectives, a trolley is provided, comprising a frame consisting of a front wheel support, a rear wheel support, and a handlebar support. The front wheel support and the handlebar support are connected by a hinge assembly that can change and fix the position of the frame in a folded or unfolded state. An adapter is fixed to the frame and configured to allow a load-bearing device to be mounted thereon.

[0012] According to the invention, the trolley includes three pairs of adapters, wherein the first pair of adapters is an upper adapter, the second pair of adapters is a middle adapter, and the third pair of adapters is a lower adapter. Furthermore, at least one pair of the upper and middle adapters is arranged on the handle support, and at least one pair of the upper and middle adapters is removable.

[0013] The lower adapters are arranged adjacent to the inside of the front wheel support and are non-removable, and each lower adapter includes a pivoting mechanism configured to change the position of the lower adapter, wherein in the operating position, the lower adapter is oriented upward relative to the front wheel support.

[0014] The lower adapter is non-removable, preventing accidental loss during the use, transport, or folding of the trolley, as it is always securely fixed to the front wheel support and requires no additional action from the user related to its installation or removal. This improves the reliability of the structure and simplifies product use by eliminating the need for control over individual small components.

[0015] The lower adapter is equipped with a pivoting mechanism, ensuring the versatility of the stroller structure and allowing for the use of one or two children by mounting different support devices in different orientations and combinations. In the operating position, the lower adapter faces upward relative to the front wheel support, thereby allowing the support device to be mounted thereon, forming an additional support surface and improving the stability of the structure when using heavier modules.

[0016] Three pairs of adapters enable the following six configurations for the operating position of the adapters: (i) The upper adapter pair, the middle adapter pair, and the lower adapter pair are positioned opposite to the operating position; (ii) The middle adapter pair and the lower adapter pair are in the operating position; (iii) The upper adapter pair and the lower adapter pair are in the operating position; (iv) The middle adapter pair and the lower adapter pair are positioned opposite to the operating position; (v) The middle adapter pair and the lower adapter pair are in positions different from the operating position or in positions opposite to the operating position; (vi) The upper adapter pair, the middle adapter pair and the lower adapter pair are in the operating position.

[0017] This design ensures that the load-bearing device has multiple arrangement options, in particular, the ability to install one or two different types of load-bearing devices, change their orientation, optimize the load distribution on the frame, prevent interference between the load-bearing devices, and ensure the stability of the trolley during use in any of the provided configurations.

[0018] The technical advantage of this design lies in expanding the functionality of the stroller through the arrangement of the adapter. The structural implementation and mutual positioning of the adapter ensure high variability, allowing for the simultaneous or selective installation of one and / or two support devices to accommodate one child of different ages and weights, two children of the same and / or different ages and weights, or goods or animals. Furthermore, the orientation of the installed support devices relative to the stroller's direction of movement can be changed. In addition, the technical advantage also lies in improving the stability and balance of the stroller structure under loads from support devices of varying weights by ensuring that the adapter remains fixed in both the operating and non-operating positions and will not accidentally detach or shift, thereby enhancing operational safety.

[0019] According to a preferred exemplary embodiment of the present invention, the carrying device is a cradle, car seat, or infant carrier. This design allows the stroller to be used for children of different ages and pets, and the stroller configuration can be quickly changed according to the user's needs.

[0020] According to another exemplary embodiment of the invention, the carrying device is a walking unit comprising a seat and a backrest connected by a hinge assembly, wherein the backrest is configured to adjust its tilt angle relative to the seat, and the walking unit is configured to be mounted in two orientations relative to the direction of movement of the stroller. With this design, the walking unit can meet the needs of children, ensure comfort and safety, and allow the child to face either the parents or the direction of movement.

[0021] According to another exemplary embodiment of the invention, the walking unit can be folded and unfolded together with the frame in two orientations. This design simplifies the use of the product, reduces the time and operation steps in the folding and unfolding process of the trolley, and allows one or both walking units to be folded into a compact size with the frame regardless of their orientation, thus facilitating transportation.

[0022] According to another exemplary embodiment of the invention, the carrying device is a carriage, which consists of a carriage frame and guardrails and is equipped with at least one seating position. The carriage frame is made of at least two half-frames interconnected by hinges, which can change and fix the tilt angle of each half-frame. This design ensures that one or two children can be placed, allows the spatial configuration of the carriage to be changed according to the user's needs, and ensures the safe transport of children.

[0023] According to another exemplary embodiment of the invention, the carriage can be folded and unfolded together with the frame, thus ensuring compactness in the folded state and facilitating the storage and transport of the trolley.

[0024] According to another exemplary embodiment of the invention, the upper adapter pair and the middle adapter pair are arranged on the handle support and above the folding hinge assembly, thereby improving the spatial arrangement and preventing the load-bearing devices from contacting each other.

[0025] According to another exemplary embodiment of the present invention, the central adapter pair is arranged on the folding hinge assembly from the inside.

[0026] According to another exemplary embodiment of the invention, the lower adapter faces downward relative to the front wheel support at a position opposite to the operating position. This design ensures that additional configurations of the operating positions of the upper and middle adapter pairs can be formed, thereby optimizing the spatial arrangement of the load-bearing device and forming other installation configurations of the load-bearing device, including the simultaneous installation of two different types of load-bearing devices.

[0027] According to another exemplary embodiment of the invention, the lower adapter is disposed facing each other at a location different from the operating position. This design improves the visual appearance of the trolley and reduces the likelihood of the user's leg or external object tripping during movement, thus improving the operational safety of the trolley and reducing the risk of injury.

[0028] According to another exemplary embodiment of the present invention, the handle support includes a mechanism for adjusting the tilt angle of the handle, which allows the user to change the position of the handle to accommodate height and improve convenience, thereby improving the ergonomics of the trolley operation.

[0029] According to another exemplary embodiment of the present invention, the handlebar support is connected to the rear wheel support via a shock absorber support, thereby ensuring improved ride smoothness, buffering vibrations caused by uneven road surfaces, and maintaining the stability and rigidity of the structure.

[0030] The advantages of this structural design are that the trolley can be used as a single-seat trolley or a double-seat trolley, offering high versatility and ease of use, thus providing operational advantages. It eliminates the need to purchase and store multiple independent trolleys for different purposes, reducing space occupied during living and transportation. Furthermore, the configuration can be quickly changed according to current family needs, the birth of a second child, changes in the child's age or weight, or the need to install various carrying devices. The trolley can be used not only for children but also for goods, animals, etc. Attached Figure Description

[0031] To more fully understand the present invention and its advantages, its feasible embodiments are described below in conjunction with the accompanying drawings, wherein the same reference numerals denote the same parts, and the drawings illustrate the following: Figure 1 A schematic diagram of a trolley with three pairs of adapters is shown.

[0032] Figure 2 A schematic diagram of a trolley with three pairs of adapters is shown.

[0033] Figure 3 A schematic diagram of a trolley with three pairs of adapters is shown.

[0034] Figure 4 A cart with configuration (i) is shown.

[0035] Figure 5 A cart with configuration (ii) is shown.

[0036] Figure 6 A trolley with configuration (iii) is shown.

[0037] Figure 7 A trolley with configuration (iv) is shown.

[0038] Figure 8 A cart with configuration (v) is shown.

[0039] Figure 9 A cart with configuration (vi) is shown.

[0040] Figure 10 The image shows two walking units that fold together with the trolley frame.

[0041] Figure 11 The carriage is shown folded together with the trolley frame.

[0042] Key reference numerals: 1. Stroller, 2. Rear wheel support components, 3. Front wheel support components, 4. Handle support component, 5. Tilt adjustment mechanism, 6. Handle, 7. Folding hinge assembly, 8. Upper adapter pair, 9. Middle adapter pair, 10. Lower adapter pair, 11. Pivoting mechanism, 12. Cradle 13. Child safety seat, 14. Basket, 15. Walking unit, 16. Seats, 17. Backrest, 18. Hinge assembly, 19. The carriage, 20. Half a frame, 21. Hinges 22. Guardrail, 23. Seating position, 24. Shock absorber support components.

[0043] The illustrative material used to explain the present invention and the specific exemplary embodiments disclosed herein does not limit the scope of the claimed rights in any way, but is only used to illustrate the essence of the invention. Detailed Implementation

[0044] A trolley (1) includes a frame consisting of a rear wheel support (2), a front wheel support (3) and a handle support (4), wherein the front wheel support (3) and the handle support (4) are connected by a folding hinge assembly (7), which can change and fix the position of the frame in a folded or unfolded state.

[0045] The frame of the trolley (1) includes three pairs of adapters (8, 9, 10), wherein the first pair of adapters is the upper adapter (8), the second pair of adapters is the middle adapter (9), and the third pair of adapters is the lower adapter (10). In this exemplary embodiment, as Figure 1 As shown, the upper adapter pair (8) and the middle adapter pair (9) are arranged on the handle support (4) and above the folding hinge assembly (7). Furthermore, the upper adapter pair (8) and the middle adapter pair (9) can also be arranged separately on the handle support (4), or, for example, on a common planar bracket. This configuration ensures precise arrangement of the fasteners relative to each other. Moreover, this arrangement significantly simplifies the manufacturing process because the use of a unified planar bracket reduces the number of individual components, simplifies quality control processes, and enables rapid fastener installation during manufacturing. In another exemplary embodiment, as... Figure 2 As shown, the upper adapter pair (8) is arranged on the handle support (4) and above the folding hinge assembly (7), while the middle adapter pair (9) is arranged on the front wheel support (3) and below the folding hinge assembly (7). In another exemplary embodiment, as Figure 3As shown, the upper adapter pair (8) is arranged on the handle support (4) and above the folding hinge assembly (7), while the middle adapter pair (9) is arranged on the folding hinge assembly (7) from the inside. Furthermore, at least one pair of the upper adapter (8) and the middle adapter (9) is removable. This configuration is merely an exemplary embodiment of the invention and does not constitute any limitation on the arrangement and fixing options of the upper adapter pair (8) and the middle adapter pair (9).

[0046] The lower adapter pair (10) is disposed adjacent to the inside of the front wheel support (3) and is non-removable, and each lower adapter (10) includes a pivoting mechanism (11) configured to change the position of the lower adapter (10), wherein in the operating position, the lower adapter (10) is oriented upward relative to the front wheel support (3). The pivoting mechanism (11) may be a hinged connection or an axial connection and may include at least one shaft or rotating stud mounted in a corresponding opening or sleeve in the front wheel support (3) and / or the lower adapter (10). If necessary, the pivoting mechanism (11) may include a rotation angle limiter, an elastic element (e.g., a torsion spring or a plane spring), and a retainer (e.g., a latch, a toothed sector block, a pin, etc.) that holds each lower adapter (10) in a set position.

[0047] The adapters (8, 9, 10) are designed for removably connecting a carrier and can have any shape and size. In the accompanying drawings, the adapters are shown as circular; however, this does not limit the invention, and the adapters can be, for example, elliptical, oval, polygonal, or other arbitrary shapes. The adapters (8, 9, 10) can be made as pins, studs, hooks, brackets, sockets, bushings, brackets, frames, guide profiles, П-shaped, L-shaped, or U-shaped elements, or combinations thereof. The surfaces of the adapters (8, 9, 10) may have recesses or grooves, and the carrier may have corresponding protrusions, retainers, elastic elements, etc., which cooperate to ensure easy connection and disassembly of the carrier and the adapter, and to ensure reliable fixation in the operating position. For example, each adapter (8, 9, 10) may include an adapter fixing mechanism and a carrier removal button for convenient and quick assembly and disassembly. Furthermore, the adapters (8, 9, 10) can be part of either the trolley frame or the carrier.

[0048] According to the general concept of the present invention, the adapters (8, 9, 10) arranged on the trolley frame (1) are made of a universal type, intended for mounting various load-bearing devices thereon. The structure of the adapters (8, 9, 10) ensures that the position of each pair of adapters relative to the frame is fixed, thereby enabling various load-bearing device mounting configurations. Furthermore, the type of load-bearing device is not limited to the examples below, and can be any type, as long as its structure can be fixed to the adapters (8, 9, 10) by appropriate connection geometry or adapter units. Therefore, in the present invention, the key to utilizing variability is precisely achieved through the structural design and spatial arrangement of the adapters (8, 9, 10).

[0049] In one exemplary embodiment, the carrying device is a cradle (12), a car seat (13), or a carrier (14). Furthermore, the carrier (14) can be used to transport pets such as cats and dogs, or to transport goods.

[0050] In another exemplary embodiment, the support device is a walking unit (15), which includes a seat (16) and a backrest (17) connected by a hinge assembly (18), wherein the backrest (17) is configured to adjust its tilt angle relative to the seat (16), and the walking unit (15) is configured to be mounted in two orientations relative to the direction of movement of the trolley (1). It should be noted that in the accompanying drawings showing the walking unit (15), the fabric finish and soft elements are not shown in order to better illustrate the structural details and assembly of the walking unit (15).

[0051] In another exemplary embodiment of the invention, the carrying device is a carriage (19), which consists of a carriage frame and guardrails (22) and is equipped with at least one seating position (23). The carriage frame is made of at least two half-frames (20) interconnected by hinges (21), which can change and fix the tilt angle of each half-frame (20). The hinges (21) can be made, for example, in the form of a pivot assembly, with its axis of rotation mounted on the corresponding end of the half-frame (20), and its position can be fixed by retainers that engage with toothed sector blocks, a series of holes or grooves formed on the elements of the half-frame (20). The tilt angle of each half-frame (20) can be fixed, particularly by spring retainers, locking pins, eccentric clamps and / or screw clamps, which ensures both that the tilt angle of the half-frame (20) can be changed and that reliable fixation can be achieved. Furthermore, the hinge (21) may form a unit including teeth and / or stops, which, when engaged with the corresponding end of the half-frame (20), ensures that the movement of the half-frame (20) is restricted to at least two extreme fixed positions. The tilt angle of the half-frame (20) can be changed, for example by pressing a folding button located directly on the hinge (21) and connected to the movement of the retainer, switching the retainer to the unlocked state, rotating the half-frame (20) to the desired position, and automatically engaging the retainer after releasing the button. Alternatively, the tilt angle of the half-frame (20) can be changed by a hinge lever and / or traction mechanism, wherein the user applies force to one of the half-frames (20) to switch it from the unfolded position to the semi-folded state, and after releasing the half-frame (20), the spring retainer, eccentric clamp, and / or screw clamp automatically fix it in the current position. The compartment (19) may be equipped with a removal button connected to the movement of the components of the adapter (8, 9, 10), thereby ensuring convenient and quick disassembly of the compartment (19). In addition, the carriage (19) may be equipped with additional accessories, such as awnings, tables, handrails, etc.

[0052] Depending on the user's needs and the type of carrier device, the three pairs of adapters (8, 9, 10) provide six operating position configurations for the adapters (8, 9, 10) in the form of (i), (ii), (iii), (iv), (v), and (vi).

[0053] (i) The upper adapter pair (8), the middle adapter pair (9) and the lower adapter pair (10) are in positions opposite to the operating position.

[0054] Figure 4 Configuration (i) is shown, in which the cradle (12) can be mounted on the upper adapter pair (8), and the carriage (19) can be mounted on the middle adapter pair (9), wherein the lower adapter pair (10) is in a position opposite to the operating position, i.e., the lower adapter (10) faces downward relative to the front wheel support (3), without obstructing the installation of the carriage (19). It should be noted that... Figure 4The cradle (12) shown is provided only as an example of a carrying device. In this configuration, another carrying device may be installed on the upper adapter pair (8) instead of the cradle (12), in particular a safety seat (13), a carry basket (14), or a walking unit (15). The carrying devices (12, 13, 14, 15) may be installed in two orientations relative to the direction of movement of the trolley (1).

[0055] (ii) The middle adapter pair (9) and the lower adapter pair (10) are in the operating position.

[0056] Figure 5 Configuration (ii) is shown, in which the compartment (19) in the semi-folded position can be mounted on the middle adapter pair (9), and the safety seat (13) can be mounted on the lower adapter pair (10) in the operating position. It should be noted that... Figure 5 The safety seat (13) shown is provided only as an example of a carrier. In this configuration, another carrier may be installed on the lower adapter pair (10) instead of the safety seat (13), particularly a cradle (12), a carrier (14), or a walking unit (15). The carriers (12, 13, 14, 15) may be installed in two orientations relative to the direction of movement of the trolley (1).

[0057] (iii) The upper adapter pair (8) and the lower adapter pair (10) are in the operating position.

[0058] Figure 6 Configuration (iii) is shown, in which the basket (14) can be mounted on the upper adapter pair (8), and the walking unit (15) can be mounted on the lower adapter pair (10) in the operating position. It should be noted that... Figure 6 The basket (14) and walking unit (15) shown are provided only as examples of carrying devices. In this configuration, another carrying device may be installed on the upper adapter pair (8) or the lower adapter pair (10), specifically the cradle (12), the car seat (13), the basket (14), or the walking unit (15). The carrying devices (12, 13, 14, 15) may be installed in two orientations relative to the direction of movement of the trolley (1).

[0059] (iv) The middle adapter pair (9) and the lower adapter pair (10) are in positions opposite to the operating position.

[0060] Figure 7The configuration (iv) is shown, in which the carriage (19) in the unfolded position can be mounted on the middle adapter pair (9), the carriage is equipped with two seating seats (23) for carrying two children, and the lower adapter pair (10) is in a position opposite to the operating position, that is, the lower adapter (10) faces downward relative to the front wheel support (3) without obstructing the installation of the carriage (19).

[0061] (v) The middle adapter pair (9) and the lower adapter pair (10) are in positions different from or opposite to the operating position.

[0062] Figure 8 The configuration (v) is shown, in which the walking unit (15) can be mounted on the middle adapter pair (9), while the lower adapter pair (10) is, for example, in a position different from the operating position, i.e., the lower adapters (10) are facing each other, or in a position opposite to the operating position, i.e., the lower adapters (10) are facing downwards relative to the front wheel support (3). It should be noted that... Figure 8 The walking unit (15) shown is provided only as an example of a carrying device. In this configuration, another carrying device may be installed on the central adapter pair (9) instead of the walking unit, such as a cradle (12), a car seat (13), a baby carrier (14), or a compartment (19) with a seating position (23) in a semi-folded position. This configuration ensures that one child can be transported.

[0063] (vi) The upper adapter pair (8), the middle adapter pair (9) and the lower adapter pair (10) are in the operating position.

[0064] Figure 9 A configuration (vi) is shown, in which the traveling unit (15) can be mounted on the upper adapter pair (8), the carriage (19) in a semi-folded position can be mounted on the middle adapter pair (9), and the traveling unit (15) can be mounted on the lower adapter pair (10) in an operating position. In this exemplary embodiment, the carriage (19) will act as a carrying device to transport goods, such as toys, purchased items, or clothing. It should be noted that Figure 9 The walking unit (15) shown is provided only as an example of a carrying device. In this configuration, another carrying device may be installed on the upper adapter pair (8) or the lower adapter pair (10), in particular a cradle (12), a car seat (13), or a carrier (14). The carrying devices (12, 13, 14, 15) may be installed in two orientations relative to the direction of movement of the trolley (1).

[0065] It should also be noted that the above six configurations utilize Figure 1 , Figure 2 and Figure 3This is achieved by arranging the adapters (8, 9, 10) shown.

[0066] The walking unit (15) is configured to fold and unfold together with the frame of the trolley (1). The structure of the connecting components of the walking unit (15) and its fixation on any pair of adapters (8, 9, 10) ensure that the walking unit (15) can be folded and unfolded together with the frame in either of two orientations relative to the direction of movement of the trolley (1). Figure 10 Two walking units (15) are shown folded together with the frame of the trolley (1).

[0067] The carriage (19) is also configured to fold and unfold together with the frame of the trolley (1), such as Figure 11 As shown, the presence of the hinge (21) between the half-frames (20) of the carriage (19) ensures this. Figure 11 The carriage (19) is shown, but for better illustration, it is not shown with guardrails (22) and seats (23).

[0068] Since the three pairs of adapters (8, 9, 10) arranged on the frame of the trolley (1) are universal, the two simultaneously installed walking units (15) can be folded and unfolded together with the frame in two orientations relative to the direction of movement of the trolley (1).

[0069] Similarly, the walking unit (15) and the carriage (19) installed on different adapter pairs can also be folded and unfolded together with the frame of the trolley (1) without prior removal.

[0070] In one exemplary embodiment, the handlebar support (4) includes a mechanism (5) for adjusting the tilt angle of the handlebar (6). The mechanism is provided only as an example of structural design. In other embodiments, the handlebar (6) may be made, for example, telescopic, pivotal, foldable, or have another mechanism for adjusting its length or position, as long as it is ensured that it can be mounted on the handlebar support (4) and is compatible with the frame structure.

[0071] The handlebar support (4) is connected to the rear wheel support (2) via the shock absorber support (24). Therefore, the shock absorber support (24) can be combined with the middle adapter pair (9) or the upper adapter pair (8), or located between the middle adapter pair (9) and the upper adapter pair (8), or located outside the two pairs of adapters (8, 9).

[0072] The structural design, through the arrangement of adapters, ensures the expansion of the stroller's functionality. The adapter's structural design and mutual positioning allow for the simultaneous or selective installation of one and / or two support units to accommodate one or two children of different ages and weights. The adapters can also change their orientation relative to the stroller's direction of movement, improving the structure's stability and balance under load, preventing accidental detachment or displacement of the adapters, and ensuring the stroller's compactness in folded and unfolded positions, thus enhancing convenience for daily use and outings. Furthermore, this stroller design meets the additional needs of families with a second child or pets, eliminating the need to purchase a separate stroller or transport vehicle, which is environmentally beneficial. The stroller has a long lifespan, therefore requiring less manufacturing cost and resources compared to multiple different strollers, thus helping to reduce waste at the end of its lifespan.

Claims

1. A trolley (1) comprising a frame and an adapter mounted on the frame, the frame consisting of a rear wheel support (2), a front wheel support (3), and a handlebar support (4), the front wheel support (3) and the handlebar support (4) being connected by a folding hinge assembly (7) capable of changing and fixing the position of the frame in a folded or unfolded state, the adapter being configured to allow a load-bearing device to be mounted thereon. in, The trolley includes three pairs of adapters, wherein the first pair of adapters is an upper adapter (8), the second pair of adapters is a middle adapter (9), and the third pair of adapters is a lower adapter (10). Furthermore, at least one pair of the upper adapter (8) and the middle adapter (9) is arranged on the handle support (4), and at least one pair of the upper adapter (8) and the middle adapter (9) is removable; Furthermore, the lower adapter pair (10) is arranged adjacent to the inside of the front wheel from the front wheel support (3) and is non-removable, and each lower adapter (10) includes a pivoting mechanism (11) configured to change the position of the lower adapter (10), wherein in the operating position, the lower adapter (10) faces upward relative to the front wheel support (3). Furthermore, the three pairs of adapters (8, 9, 10) enable the following six configurations of the operating positions of the adapters (8, 9, 10): (i) The upper adapter pair (8), the middle adapter pair (9) and the lower adapter pair (10) are in positions opposite to the operating position; (ii) The middle adapter pair (9) and the lower adapter pair (10) are in the operating position; (iii) The upper adapter pair (8) and the lower adapter pair (10) are in the operating position; (iv) The middle adapter pair (9) and the lower adapter pair (10) are positioned opposite to the operating position; (v) The middle adapter pair (9) and the lower adapter pair (10) are in positions different from or opposite to the operating position; (vi) The upper adapter pair (8), the middle adapter pair (9) and the lower adapter pair (10) are in the operating position.

2. The trolley according to claim 1, wherein, The support device is a cradle, car seat, or basket.

3. The trolley according to claim 1, wherein, The carrying device is a walking unit (15) which includes a seat (16) and a backrest (17) connected by a hinge assembly (18), wherein the backrest (17) is configured to adjust the tilt angle relative to the seat (16), and the walking unit (15) is configured to be mounted in two orientations relative to the direction of movement of the trolley.

4. The trolley according to claim 3, wherein, The walking unit (15) can be folded and unfolded together with the frame in two orientations.

5. The trolley according to claim 1, wherein, The carrying device is a carriage (19), which consists of a carriage frame and guardrails (22) and is equipped with at least one seating position (23). The carriage frame is made of at least two half-frames (20) interconnected by hinges (21), which can change and fix the tilt angle of each half-frame (20).

6. The trolley according to claim 5, wherein, The carriage (19) can be folded and unfolded together with the frame.

7. The trolley according to claim 1, wherein, The upper adapter pair (8) and the middle adapter pair (9) are arranged on the handle support (4) and located above the folding hinge assembly (7).

8. The trolley according to claim 1, wherein, The central adapter pair (9) is arranged from the inside on the folding hinge assembly (7).

9. The trolley according to claim 1, wherein, At a position opposite to the operating position, the lower adapter (10) faces downward relative to the front wheel support (3).

10. The trolley according to claim 1, wherein, The lower adapter (10) is positioned opposite each other at a location different from the operating position.

11. The trolley according to claim 1, wherein, The handle support (4) includes a mechanism (5) for adjusting the tilt angle of the handle (6).

12. The trolley according to claim 1, wherein, The handlebar support (4) is connected to the rear wheel support (2) via the shock absorber support (24).

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