A stroller having a seat linkage folding frame

Abstract

The utility model discloses a baby carriage of seat linkage folding frame, including frame structure, seat subassembly and locking mechanism, frame structure realizes the folding through the rotation of handlebar rotator and foot tube rotator, and both linkage through the linkage piece, seat subassembly is set up in frame structure and is equipped with driving piece, locking mechanism includes locking piece and release lock piece, locking piece is used for preventing handlebar rotator to rotate, and release lock piece is configured as with the activity of seat subassembly and is driven by driving piece, and after the action, the limitation of locking piece is cancelled to the, thereby allowing handlebar rotator to rotate and linkage folding frame. Therefore, user only needs to operate seat subassembly to can synchronous trigger frame folding, and then realizes whole vehicle folding, and completes the integration and simplification of folding vehicle action, and the utility model has the beneficial technical effect of improving folding vehicle operation intuitiveness and convenience.

Description

Technical Field

[0001] This utility model relates to the field of infant and toddler products technology, and in particular to a stroller with a seat-linked folding frame. Background Technology

[0002] In the infant and toddler product sector, strollers, as an essential mode of transportation accompanying children's growth, have always had portability and ease of use as core concerns for users. With the diversification of family travel scenarios, users have placed higher demands on the ability of strollers to fold and unfold quickly and effortlessly. In situations requiring one-handed operation or holding an infant, a solution that allows the entire stroller to fold and unfold with a simple action is particularly important.

[0003] Currently, most common self-folding strollers use an independent unlocking mechanism inside the frame to achieve folding. For example, one existing technology, such as Chinese patent CN223546344U, uses an impact component and a series of folding mechanisms at the handlebars of the frame. When the user releases the handlebar lock, the impact triggers internal mechanical linkages, gradually unlocking the joints to fold the frame. This method represents the mainstream folding solution. Although it achieves automatic folding of the frame, the unlocking and folding actions rely entirely on the frame's own structural triggering and transmission. The user still needs to directly manipulate frame components (such as the handlebars) to fold the stroller. This means that in actual use, users often need to handle the frame first and then the seat separately; the steps are not integrated, and the overall folding process is not smooth or convenient.

[0004] In summary, existing technologies that rely on the independent unlocking and folding of the frame require users to operate the frame and seat modules separately when folding the bike. This fragmented approach fails to achieve a single, intuitive action that triggers the synchronized, coordinated folding of the entire bike. Therefore, existing technologies still have technical shortcomings in terms of the intuitiveness of the folding operation and the overall convenience of the structure. Utility Model Content

[0005] The main purpose of this invention is to propose a stroller with a seat-linked folding frame, which aims to solve the technical problem of the existing technology that separates the folding of the frame and seat in terms of intuitive operation and overall structural convenience.

[0006] To achieve the above objectives, this utility model proposes a stroller with a seat-linked folding frame, including a frame structure, a seat assembly, and a locking mechanism. The frame structure includes a frame joint seat and a handlebar rotator and a foot tube rotator rotator rotatably fitted to the frame joint seat. The handlebar rotator and foot tube rotator are configured to fold the frame structure. A linkage is provided between the handlebar rotator and the foot tube rotator. The linkage is configured to drive the foot tube rotator to rotate after the handlebar rotator rotates. The seat assembly is movably mounted on the frame structure and includes a driving member. The locking mechanism includes a locking member and a releasing member. The locking member is configured to prevent the handlebar rotator from rotating. The releasing member is configured to release the locking member after the seat assembly moves relative to the frame structure and is acted upon by the driving member, thereby allowing the handlebar rotator to rotate.

[0007] Furthermore, the seat assembly defines a receiving chamber with an axial opening, and the drive includes a mounting end at least partially disposed within the receiving chamber, and a drive end extending from the receiving chamber for engaging the operation of the release mechanism.

[0008] Furthermore, the seat assembly is rotatably configured relative to the frame structure, and the drive end is constructed as a block that gradually narrows in the direction of extending from the accommodating chamber. The two sides of the block that gradually narrow are defined as a first drive surface and a second drive surface that are inclined relative to the opening direction of the accommodating chamber. The first drive surface and the second drive surface are configured to abut against and act on the release member from the clockwise direction and the counterclockwise direction, respectively, thereby unlocking the frame structure.

[0009] Furthermore, the seat assembly includes an arcuate portion extending in a circumferential direction, the arcuate portion having the accommodating chamber, and a first driving surface and a second driving surface of the drive end being arranged along the extending direction of the arcuate portion, thereby forming an inclination between the first driving surface and the second driving surface relative to the horizontal radial direction of the frame joint seat.

[0010] Furthermore, the handle rotation component is provided with a limiting block, and the locking component includes a first contact surface and a second contact surface that are in contact. The first contact surface is configured to receive the limiting block at its bottom, thereby preventing the handle rotation component from moving. The second contact surface is located at one end of the first contact surface and extends downward toward the first contact surface. The limiting block is configured to slide along the first contact surface after the locking component is deflected by the unlocking component, and continue to slide along the direction of the second contact surface after reaching the second contact surface, thereby forming the rotation and retraction of the handle rotation component.

[0011] Furthermore, a rotating seat is provided inside the frame joint seat, and the locking member includes a rotating part. The locking member is rotatably connected to the rotating seat through the rotating part. The rotating seat is configured to define the rotation center of the locking member so that the locking member rotates after being acted upon by the release member. At the same time, the release member is provided at one end of the locking member near the second contact surface.

[0012] Furthermore, the first contact surface and the second contact surface are constructed on the upper part of the locking member, and the locking member is provided with a stop post on the side away from the second contact surface for limiting and guiding the rotation direction of the locking member, and the stop post is provided on the lower part of the locking member.

[0013] Furthermore, the locking member has a stepped portion at the other end of the first contact surface away from the second contact surface, and the stepped portion is configured to prevent the limiting block from sliding in a non-predetermined direction.

[0014] Furthermore, the frame joint seat defines an axially open opening, and the release member extends at least partially from the frame joint seat through the opening, thereby forming mechanical contact with the drive member. The structure of at least part of the release member extending from the opening is configured as a block that gradually narrows outward with respect to the direction of the opening.

[0015] Furthermore, the handle rotator and the foot tube rotator are respectively provided with a first rotation limiting structure and a second rotation limiting structure for defining the rotatable angle. The first rotation limiting structure is constructed as a groove recessed inward from the contour of the handle rotator, while the second rotation limiting structure is constructed as a groove formed inside the foot tube rotator.

[0016] This utility model includes a frame structure, a seat assembly, and a locking mechanism. The frame structure folds down via the rotation of the handlebar and foot tube rotators, which are linked together by a connecting component. The seat assembly is movably mounted on the frame structure and is equipped with a driving component. The locking mechanism includes a locking component and a releasing component. The locking component prevents the handlebar rotator from rotating, and the releasing component is configured to release the locking component after being activated by the driving component along with the movement of the seat assembly, thereby allowing the handlebar rotator to rotate and fold down the frame. Thus, the user only needs to operate the seat assembly to simultaneously trigger the frame folding, thereby achieving full folding of the bicycle. This integrates and simplifies the folding action, and this utility model has the beneficial technical effect of improving the intuitiveness and convenience of folding down the bicycle. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the seat assembly;

[0019] Figure 3 for Figure 2 Enlarged view of a portion of section AA;

[0020] Figure 4 An exploded view of the partial three-dimensional structure of the seating assembly;

[0021] Figure 5 A three-dimensional structural diagram of the vehicle frame;

[0022] Figure 6 This is a partial exploded view of the vehicle frame structure.

[0023] Figure 7 This is a schematic diagram of the planar structure of the components inside the frame joint seat in the unfolded state;

[0024] Figure 8 This is a three-dimensional structural diagram of the components inside the frame joint seat in the unfolded state;

[0025] Figure 9 This is a schematic diagram of the internal structure of the components of the frame joint seat in the folded state.

[0026] Figure 10 An exploded three-dimensional view of components such as the handle rotating part, the release part, and the locking part;

[0027] Figure 11 A schematic diagram showing the assembly of components such as the stop post, the limit pin, the first rotation limit structure, and the second rotation limit structure;

[0028] Figure 12 This is a side view of the present invention in its unfolded state;

[0029] Figure 13 This is a side view of the seat assembly of this utility model after it has been folded forward.

[0030] Figure 14 This is a side view of the seat assembly of this utility model after it has been folded back.

[0031] The above figures include the following reference numerals:

[0032] 1. Frame structure; 11. Frame joint seat; 12. Handlebar rotating component; 121. Limiting block; 122. First rotation limiting structure; 13. Foot tube rotating component; 131. Second rotation limiting structure; 14. Linking component; 15. Rotating seat; 16. Through port; 2. Seat assembly; 21. Drive component; 211. Mounting end; 212. Drive end; 2121. First drive surface; 2122. Second drive surface; 22. Accommodating chamber; 23. Arc-shaped part; 3. Locking mechanism; 31. Locking component; 32. Releasing component; 311. First contact surface; 312. Second contact surface; 313. Rotating part; 314. Stepped part; 41. First reset component; 42. Second reset component; 43. Third reset component; 5. Stop post; 6. Limiting pin. Detailed Implementation

[0033] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0034] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0036] This invention proposes a stroller with a seat-linked folding frame. In existing technology, strollers fold and fold down in two main modules: the frame and the seat. During folding, the frame and seat fold independently to achieve the final fold. How to differentiate this invention from existing technology by enabling coordinated folding of the frame and seat is the pressing problem this invention aims to solve.

[0037] In the embodiments of this utility model, such as Figures 1 to 14As shown, the stroller includes a frame structure 1, a seat assembly 2, and a locking mechanism 3. The frame structure 1 includes a frame joint seat 11 and a handlebar rotator 12 and a foot tube rotator 13 rotatably fitted to the frame joint seat 11. The handlebar rotator 12 and the foot tube rotator 13 are configured to fold the frame structure 1. A linkage 14 is provided between the handlebar rotator 12 and the foot tube rotator 13. The linkage 14 is configured to drive the foot tube rotator 13 to rotate after the handlebar rotator 12 rotates. The seat assembly 2 is movably mounted on the frame structure 1 and includes a drive member 21. The locking mechanism 3 includes a locking member 31 and a releasing member 32. The locking member 31 is configured to prevent the handlebar rotator 12 from rotating. The releasing member 32 is configured to release the locking member 31 after the seat assembly 2 moves relative to the frame structure 1 and is acted upon by the drive member 21, thereby allowing the handlebar rotator 12 to rotate.

[0038] It should be noted that seat assembly 2 should be understood as a combined structure that includes at least a seat, such as a seat assembly 2 including components such as a seat, armrests, footrest, backrest, and sunshade. Seat assembly 2 can be assembled according to the objective needs of the product. As mentioned above, seat assembly 2 should at least include a seat and drive component 21. Meanwhile, handle rotation component 12 and foot tube rotation component 13 should be understood as partial structures of the handle and foot tube or rotating components fixed thereto. Understandably, the drive component 21 and release component 32 can be implemented in various ways. For example, drive component 21 can be implemented as a wedge block fixed to the seat frame, and release component 32 can be a sliding rod that cooperates with it; or, drive component 21 can be a cam that rotates with the seat, and release component 32 can be a swing arm pushed by the cam profile. Locking component 31 is also not limited to a pin, but can also be a hook, plate, or friction brake block, etc. As long as its design satisfies the relationship chain of seat assembly 2 movement, drive member 21 movement, drive release member 32, and release member 32 driving lock member 31 to release the lock on the rotating member, it should be considered within the scope of this utility model. In addition, in addition to conventional flat iron, linkage member 14 can also adopt other linkage methods well known to those skilled in the art, such as four-bar linkage, synchronous belt or chain drive, so as to realize the synchronous movement of handle rotating member 12 and foot tube rotating member 13.

[0039] The core innovation of this invention lies in the fact that the locking mechanism 3 is not isolated within the frame structure 1 and directly operated by the user. Instead, the movement of the seat assembly 2 relative to the frame structure 1 (such as folding, sliding, or rotating) is set as the initial signal to trigger the folding of the frame structure 1. Unlike existing technologies where the user needs to directly perform specific operations (such as pressing or impacting) on ​​frame components (such as handlebars) to trigger the folding, this invention achieves a linkage logic where moving the seat triggers the folding of the bicycle by mechanically coordinating the seat movement with the frame unlocking mechanism. The user only needs to perform a folding or displacement action on the seat assembly 2, and this action will automatically release the lock of the handlebar rotating component 12 through the interaction of the drive component 21 and the unlocking component 32, thereby integrating the originally separate frame folding and seat folding steps into a coherent trigger sequence.

[0040] This design has yielded significant benefits. First, it optimizes the user's workflow, improving the convenience and efficiency of folding the bike. Users no longer need to separately search for and operate the unlocking mechanism on the frame; instead, they only need to fold the seat assembly 2 (e.g., rotate or slide the seat) to initiate the folding of the frame structure 1, achieving a higher degree of one-button folding experience, especially suitable for one-handed operation when holding a baby or carrying items. Second, this linkage mechanism ensures the timing coordination of the folding actions of the frame structure 1 and the seat assembly 2. Since the folding of the frame structure 1 is directly triggered by the movement of the seat assembly 2, the two are closely linked in the start time of their movements, avoiding possible disjointed or uncoordinated actions, making the entire folding process smoother and more orderly, and the final folded shape more compact and stable.

[0041] It should be noted that the handlebar swivel 12 and the foot tube swivel 13 should be understood as rotating structures integrated with the frame joint 11. A typical and preferred integration embodiment is to directly accommodate and pivotally connect the handlebar swivel 12 and the foot tube swivel 13 inside the frame joint 11. This configuration, in which the core rotating components 313 are built into the joint cavity, represents a design approach significantly different from conventional exposed hinge connections.

[0042] Similar functional components can be connected via external hinges, clamps, or independent joints, but this results in a dispersed structure, larger volume, and is prone to loosening and play after repeated folding. The built-in integration method adopted in this invention completely encloses the pivot of rotational movement within the rigid shell of the frame joint seat 11. Its core innovation lies in the integration of the motion functional unit with the main support structure. The handlebar rotator 12 and foot tube rotator 13, as functional units, have their rotation centers, load-bearing surfaces, and even some limiting structures cleverly designed within the inner cavity of the joint seat, thus forming a compact, enclosed, and highly rigid motion module in physical space.

[0043] This invention presents a simple and easy-to-assemble embodiment of the seat assembly 2 and the drive member 21. The seat assembly 2 defines an axially open receiving chamber 22. The drive member 21 includes a mounting end 211 at least partially disposed within the receiving chamber 22, and a drive end 212 extending from the receiving chamber 22 for contacting the release member 32. This embodiment integrates the main structure of the drive member 21 within the receiving chamber 22 of the seat assembly 2, forming a compact and robust installation solution. Unlike conventional connections that are exposed or use brackets in the prior art, this invention directly accommodates and fixes the mounting end 211 of the drive member 21 within the structural cavity of the seat assembly 2 itself, making full use of the existing space of the seat assembly 2 and avoiding additional external volume or complex connecting parts. The drive end 212 extends from the axial opening of the receiving chamber 22, and its extension length and direction ensure that when the seat assembly 2 moves to a preset stroke, the drive end 212 can accurately and reliably abut against and act on the release member 32.

[0044] Understandably, there are multiple implementation methods for achieving the mating installation of the aforementioned receiving chamber 22 and the driving member 21. The receiving chamber 22 is not limited to a regular cylindrical cavity; it can also be a square groove, an irregular groove, or a slot surrounded by multiple ribs. Its axial opening can be a complete end opening or a lateral notch, as long as it provides the necessary movable outlet for the driving end 212. The fixing method between the mounting end 211 of the driving member 21 and the receiving chamber 22 can be, in addition to an interference fit, a snap-fit ​​connection, a threaded connection, or a pin fixation. The shape of the driving end 212 can also be adapted to the type of the release member 32; for example, it can be a cylinder, a wedge block, a roller, or a push block with a bevel. As long as its design satisfies the core mechanical relationship that the driving member 21 is integrated into the seat assembly 2 through the receiving chamber 22 and has a protruding portion for contacting and driving the release member 32 when the seat assembly 2 moves, it should be considered within the protection scope of this utility model.

[0045] Specifically, the seat assembly 2 is rotatably mounted relative to the frame structure 1. The drive end 212 is constructed as a block that gradually narrows in the direction extending from the accommodating chamber 22. The two sides of the gradually narrowing block are defined as a first drive surface 2121 and a second drive surface 2122, which are inclined relative to the opening direction of the accommodating chamber 22. The first drive surface 2121 and the second drive surface 2122 are configured to abut against and act on the unlocking member 32 from the clockwise and counterclockwise directions, respectively, thereby unlocking the frame structure 1. In this embodiment, the drive end 212 has bidirectional triggering capability and motion adaptability, which is a significant improvement over the common unidirectional drive structure in the prior art. In the prior art, the drive member 21 is often designed as a single-direction action surface (such as only one inclined surface), which means that the seat assembly 2 must be rotated strictly in a specific direction to trigger unlocking, limiting the flexibility of user operation, and may lead to failure to unlock or damage to the mechanism if the operation is mistakenly reversed. This invention achieves bidirectional compatibility of the drive component 21 by constructing the drive end 212 as a narrowed block with symmetrical or asymmetrical inclined surfaces, namely a first drive surface 2121 and a second drive surface 2122. Regardless of whether the seat assembly 2 rotates clockwise or counterclockwise relative to the frame structure 1 (e.g., corresponding to different folding and starting habits or seat designs), the corresponding drive surface (first drive surface 2121 or second drive surface 2122) can effectively abut and drive the release component 32 to complete the unlocking action. Figure 13 and Figure 14 The images shown are schematic diagrams of the seat assembly 2 folding forward and folding backward, respectively.

[0046] Understandably, the specific structure for achieving bidirectional drive functionality is not limited to a strictly wedge-shaped block. The gradually narrowing block can take various geometric forms, such as a standard wedge with two inclined surfaces intersecting at a apex; a truncated wedge with a flat top and inclined sides; a wedge with a circular arc transition, where the two drive surfaces are concave or convex arcs; and finally, a stepped-narrowing block where the drive surface consists of multiple small inclined or folded surfaces. The inclination angles of the first drive surface 2121 and the second drive surface 2122 can be the same to ensure symmetry, or different to accommodate asymmetrical mechanical requirements or spatial layouts. As long as the drive end 212 has two non-parallel action surfaces, and these two action surfaces are configured to contact and drive the same release element 32 in response to different rotational directions, they should be considered equivalent alternative designs achieving the same technical effect. Furthermore, rollers or a low-friction coating can be added to the portion of the drive surface that contacts the release element 32 to further reduce sliding friction and make operation smoother.

[0047] In some embodiments of this invention, the seat assembly 2 can be slidably connected relative to the frame structure 1, representing another mechanical path to realize the concept of a moving seat as a moving vehicle. Unlike the aforementioned rotary connection scheme where the drive end 212 triggers unlocking via angular displacement, in the sliding connection scheme, the translational movement of the seat assembly 2 along a straight line or a specific curve is directly used as the initial power source for unlocking the frame. This design is particularly suitable for infant vehicle models where the seat assembly 2 has a fore-and-aft sliding adjustment function or where the entire vehicle needs to be translated and folded in a specific direction, seamlessly connecting and extending a conventional adjustment or folding action into a coordinated folding trigger signal for the entire vehicle.

[0048] The core of this implementation lies in the integration of the drive member 21 with the sliding structure of the seat assembly 2, with the movement trajectory of the drive end 212 aligned with the sliding direction. When the user pushes the seat assembly 2 (e.g., slides it backward from its operating position to a folded-down ready position), the drive member 21, fixed to the seat, translates accordingly. At a predetermined position at the end or middle of the slide, the drive end 212 (whose construction may no longer be a bidirectional inclined block, but rather a push block, protrusion, or ramp more suitable for linear contact) accurately contacts and acts on the release member 32. Similar to the rotation scheme, this contact converts the linear kinetic energy generated by the sliding into a mechanical force that drives the release member 32, thereby releasing the frame structure 1 from locking.

[0049] Understandably, there are many equivalent alternatives to achieve the specific structure of the sliding connection. The sliding connection is not limited to a simple linear guide rail, but can also be an arc-shaped slide rail, a groove and slider combination, a ball bearing slide rail system, or a telescopic sleeve structure. The driving component 21 can be fixed to the bottom or side of the sliding seat frame. The contact method of the driving end 212 with the release component 32 can also be diversified: it can be a straight push perpendicular to the sliding direction, or an inclined surface at a certain angle to the sliding direction, converting part of the sliding force into movement of the release component 32 in different directions; it can even be that the release component 32 is pulled by a cam or lifting mechanism at the sliding end. The release component 32 itself can also be designed to move along the sliding direction, the vertical direction, or other directions. As long as the technical solution satisfies the basic causal chain of the seat assembly 2 sliding relative to the frame, the driving component 21 fixed on the seat contacting and driving the release component 32, and the release component 32 releasing the locking of the frame structure 1, it falls within the reasonable extension and scope of the technical concept of this utility model.

[0050] Specifically, returning to the case where the seat assembly 2 is rotatably connected to the frame structure 1, the seat assembly 2 includes an arc-shaped portion 23 extending in the circumferential direction. The arc-shaped portion 23 has the accommodating chamber 22. Simultaneously, the first driving surface 2121 and the second driving surface 2122 of the drive end 212 are arranged along the extending direction of the arc-shaped portion 23, thereby forming an inclination relative to the horizontal radial direction of the frame joint seat 11. Referring to conventional art, when understanding the aforementioned technical solution, it might be considered that the direction of the driving surface lacks a necessary intrinsic correlation with the rotation trajectory of the seat assembly 2, resulting in impact at the moment of contact or an unfavorable force transmission angle. Preferably, this invention directly sets the accommodating chamber 22 on the arc-shaped portion 23 of the seat assembly 2, and strictly arranges the first driving surface 2121 and the second driving surface 2122 of the drive end 212 along the extending direction of the arc-shaped portion 23, so that the spatial orientation of these two driving surfaces highly matches the rotation trajectory of the seat assembly 2 around the frame joint seat 11. The resulting inclination is not an arbitrary angle, but an optimized force transmission angle determined by the rotation radius and the predetermined unlocking position. This design produces crucial and beneficial effects. First, it unifies the motion trajectory and the action trajectory. When the seat assembly 2 rotates, the drive surface on the drive end 212 moves along a path tangent to the rotation arc. When the drive surface on this path contacts the fixed release element 32, the direction of the force at the contact point is consistent with the normal direction of the drive surface. Because the drive surface is arranged along an arc and has a specific inclination, this normal direction is precisely guided to the direction that most effectively drives the release element 32 to move (such as sliding or rotating). This minimizes unnecessary lateral force or friction, efficiently and smoothly converting rotational kinetic energy into unlocking action, achieving a smooth and effortless operating feel. Second, this integrated design significantly improves the rigidity and reliability of the structure. The drive component 21 is firmly supported within the arc-shaped portion 23, which serves as a load-bearing structure. The force it receives can be directly transmitted to the seat frame through the arc-shaped portion 23, thus avoiding deformation or damage that may result from the cantilevered installation of the drive component 21.

[0051] Understandably, there are multiple equivalent evolutions of the specific structure for achieving this optimized force transmission. The arc-shaped portion 23 does not need to be a complete semicircle; it can be a sector arc segment with a small central angle, or part of other curves (such as elliptical arcs or parabolic arcs), as long as it can provide a guiding foundation for the driving surface that is coordinated with the rotational motion. The slope of the driving surface can be a constant straight inclined plane, or a curved surface with varying curvature (e.g., a surface conjugate to the rotational trajectory) to further optimize the force variation curve. The first driving surface 2121 and the second driving surface 2122 can be arranged symmetrically or asymmetrically to accommodate asymmetrical unlocking force requirements or different spatial constraints on both sides. Furthermore, the arrangement along the extension direction of the arc-shaped portion 23 can be manifested as the driving surface itself being part of the outer shell of the arc-shaped portion 23, directly serving as the driving surface through a specific contour area on the outer shell. As long as the design satisfies the core concept that the drive component 21 is integrated into the arc-shaped structure of the seat rotation and the direction of its working surface is adapted to the rotation trajectory, so as to efficiently drive the release component 32 during rotation, it falls within the reasonable scope of the present utility model's technical solution.

[0052] In some embodiments of this utility model, the handle rotating member 12 is provided with a limiting block 121, and the locking member 31 includes a first contact surface 311 and a second contact surface 312 that are in contact. The first contact surface 311 is configured to receive the limiting block 121 at its bottom, thereby preventing the handle rotating member 12 from moving. The second contact surface 312 is located at one end of the first contact surface 311 and extends downward toward the first contact surface 311. The limiting block 121 is configured to slide along the first contact surface 311 after the locking member 31 is deflected by the releasing member 32, and continue to slide along the direction of the second contact surface 312 after reaching the second contact surface 312, thereby forming the rotation and retraction of the handle rotating member 12.

[0053] This embodiment reveals an integrated mechanism for guided unlocking and retraction, representing an innovative aspect of the locking-release-motion transition. In existing locking mechanisms, unlocking and subsequent retraction actions are often separate. For example, unlocking may simply involve pulling the locking pin out of the locking hole, while the rotational retraction of the frame structure 1 requires the user to apply a specific rotational force or relies on a separate drive mechanism. This invention creatively integrates the three functions of maintaining the locked state, triggering the lock release, and guiding the retraction motion into a coherent mechanical sequence by establishing a specific geometric configuration and spatial association between the first contact surface 311 and the second contact surface 312 of the locking member 31.

[0054] This design brings beneficial technical effects. First, it achieves a seamless transition from unlocking to closing. The user only needs to trigger the release mechanism 32 through seat movement, causing the locking mechanism 31 to initially shift. The subsequent sliding of the limit block 121 and the rotation of the handlebar rotator 12 are almost automatically completed, greatly reducing the user's required operation steps and active force, approaching true one-touch engagement. Second, the second contact surface 312 (especially its inclined portion extending below the first contact surface 311) plays a crucial role in motion guidance and energy conversion. It efficiently and smoothly converts the linear motion tendency of the limit block 121 after unlocking, due to the frame's own weight or the preload of the built-in torsion spring, into rotational torque that drives the handlebar rotator 12, making the closing action automatic, smooth, and controllable, avoiding harsh impacts or jamming. Furthermore, the smooth transition design between the first contact surface 311 and the second contact surface 312 ensures that the limit block 121 will not jump or impact during the transition from the locked state to the sliding state, reducing wear and noise, and improving the service life and operational quality of the mechanism.

[0055] The working principle of the aforementioned limiting block 121 and locking member 31 is as follows: In the locked state, the limiting block 121 is stably positioned on the first contact surface 311 (which can be considered as a platform or groove) of the locking member 31. At this time, the first contact surface 311 bears the pressure from the limiting block 121, forming a stable mechanical balance, thereby preventing the movement of the handlebar rotator 12. When the release member 32 is driven by the seat assembly 2 and applies a force to the locking member 31, the locking member 31 produces a small displacement or deflection (such as rotation about a fulcrum or translation along an axis). This offset causes the position or angle of the first contact surface 311 to change, so that the stable support platform originally provided for the limiting block 121 is "removed" or "tilted". At the moment of losing support, the limiting block 121 begins to slide along the current surface of the first contact surface 311 under the action of the inherent potential energy of the frame (such as the stored force of the torsion spring in the retraction direction) or a small external force. Since the second contact surface 312 is located at the end of the first contact surface 311 and extends downward, the limiting block 121 will naturally and smoothly transition to the second contact surface 312 when it slides to the edge of the first contact surface 311. The inclined structure of the second contact surface 312 forces the limiting block 121 to move along the inclined surface when it is falling or sliding. During this movement, due to the constraint of the inclined surface, the linear displacement component of the limiting block 121 is converted into a forced drive to rotate the handle rotating member 12, thereby pulling the handle rotating member 12 to start and continue to perform a rotating closing motion.

[0056] Understandably, there are various equivalent evolutions of the specific mechanical structure that realizes this integrated guiding function. The geometry of the first contact surface 311 and the second contact surface 312 can be diverse: the first contact surface 311 can be a plane, a concave arc surface, or an anti-slip surface with slight undulations; the second contact surface 312 can be a simple straight inclined surface, a convex arc surface (providing a gradual guiding force), or a composite surface composed of multiple inclined surfaces with different inclination angles. The transition area between the two can be a sharp edge or a smooth rounded corner to optimize the movement trajectory. The offset movement of the locking member 31 can be a combination of translation and rotation. The shape of the limiting block 121 is not limited to a cube; it can be a cylinder, a sphere, or an irregular shape. Its cooperation with the contact surface can be sliding friction, or ball bearings or low-friction material pads can be provided on the contact surface to further reduce resistance. As long as the basic logic of the design satisfies that the locking member 31 restricts the movement of the rotating member through the first contact surface 311 with the receiving function, and after unlocking and offsetting, guides the sliding of the limiting block 121 on the rotating member through the second contact surface 312 connected to it and with the guiding slope, thereby converting the linear displacement trend into rotational motion, it should be regarded as achieving the same technical effect and belonging to the equivalent alternative of this utility model.

[0057] It should be explained that the handlebar rotator 12 and foot tube rotator 13 naturally require corresponding reset components during assembly, so that after rotation and folding, they can be reset according to their original trajectory under external force. Therefore, the handlebar rotator 12 and foot tube rotator 13 are respectively provided with a first reset component 41 and a second reset component 42. The first reset component 41 and the second reset component 42 are located inside the frame joint seat 11. In accordance with the nature of rotational movement, the first reset component 41 and the second reset component 42 are preferably torsion springs. This utility model provides a continuous, stable and directional reset torque for the rotational movement of the handlebar rotator 12 and the foot tube rotator 13 by configuring torsion springs (first reset component 41 and second reset component 42) integrated inside the frame joint seat 11 on the handlebar rotator 12 and the foot tube rotator 13 respectively. This ensures that the entire linkage folding and automatic reset cycle can be reliably and efficiently completed in a closed loop.

[0058] One end of the first reset component 41 (using a torsion spring as an example) is fixed to the frame joint seat 11, and the other end acts on the handlebar rotator 12; similarly, one end of the second reset component 42 (using a torsion spring as an example) is fixed to the frame joint seat 11 or a related fixing structure, and the other end acts on the leg tube rotator 13. In the frame-opening locked state, both torsion springs are in a pre-tensioned state, storing energy. When the seat linkage triggers unlocking, the handlebar rotator 12 begins to retract and rotate with the assistance of gravity, slight force applied by the user, or the release of the torsion spring, driving the leg tube rotator 13 to rotate synchronously via the linkage 14. During this process, the torsion spring is further wound or loosened (depending on the installation direction), but its design ensures that the torque required to maintain the frame in its retracted state is maintained at the end of the retraction, preventing loosening. When the user needs to unfold the frame, a counter-torque is applied to overcome the torsion spring resistance, returning the rotator to the unfolded position, and the torsion spring is pre-tensioned again, storing energy for the next retraction.

[0059] Besides the torsion spring in the preferred embodiment, the first reset component 41 and the second reset component 42 can also be implemented by other components capable of storing and releasing elastic potential energy, and whose force direction can be adapted to rotational motion. For example, a combination of a helical tension spring, a fixed pulley, and a traction line can be used to convert the linear return force of the tension spring into a torque that drives the rotating component to reset via the rotation of the cable around the pulley; or a constant force spring (i.e., a clockwork spring) can be used, which can provide a more stable and approximately constant torque output; a torsion bar made of a highly elastic material (such as special polyurethane or spring steel) can also be directly connected to the rotating component, relying on the torsional deformation of the material itself to provide the reset torque; in addition, a gas spring (gas torsion spring) is also a feasible option, which can provide adjustable damping characteristics and reset force. As long as the elastic element and its installation method can meet the core function of being built into the relevant area of ​​the frame joint seat 11 and providing the corresponding rotating part with a definite elastic torque to promote or assist it to reset from the retracted state to the unfolded state (or vice versa), it should be regarded as an equivalent replacement of the reset technology solution of this utility model and a reasonable extension of the protection scope of this utility model.

[0060] Specifically, the frame joint seat 11 is provided with a rotating seat 15, and the locking member 31 includes a rotating part 313. The locking member 31 is rotatably connected to the rotating seat 15 through the rotating part 313. The rotating seat 15 is configured to define the rotation center of the locking member 31, so that the locking member 31 rotates after being acted upon by the releasing member 32. At the same time, the releasing member 32 is located at one end of the locking member 31 near the second contact surface 312. Taking conventional techniques in the art as an example, the movement of the locking member 31 may be relatively rough (such as unguided sliding), and it is easy to get stuck due to friction, processing errors, or interference from foreign objects. This utility model provides the locking member 31 with a pure single-degree-of-freedom rotational motion by introducing the rotating seat 15 as the support and guiding foundation for the rotating part 313. The clear positioning of this rotation center (determined by the structure of the rotating seat 15) makes the movement trajectory of the locking member 31 under force completely predictable and controllable.

[0061] Similar to the handle rotating component 12 and the foot tube rotating component 13, a third reset component 43 is configured between the locking component 31 and the rotating seat 15. The third reset component 43 is preferably a torsion spring. Unlike the first reset component 41 and the second reset component 42, which primarily function in the retraction and unfolding cycle, the third reset component 43 focuses on restoring the locking mechanism 3 to its own state. The third reset component 43 acts directly on the rotating shaft of the locking component 31 (i.e., the rotating seat 15), providing the most direct torque to ensure that the locking component 31 immediately overcomes frictional resistance and rotates after the force of the release component 32 is removed, allowing the first contact surface 311 to accurately return to the position of the receiving limit block 121. This results in higher locking reliability and faster mechanism reset response, eliminating the safety hazard of false locking or misalignment due to insufficient reset force. Simultaneously, the preload of the torsion spring can be set as needed, ensuring both moderate user operating force during unlocking and strong reset force, thus optimizing the balance between overall operating feel and safety.

[0062] One end of the third reset component 43 (taking a torsion spring as an example) is fixed to the rotating seat 15, and the other end acts on the rotating part 313 of the locking component 31 or a specific lever arm. In the locked state, the torsion spring is in a certain pre-tensioned state, storing elastic potential energy. When the release component 32 is driven by the seat to push the locking component 31 to rotate and unlock, the locking component 31 deflects against the torque of the third reset component 43. Once the seat action is completed or the drive component 21 is disengaged, the force of the release component 32 disappears, and the third reset component 43 stores elastic potential energy. When it needs to be unfolded again, it drives the locking component 31 to rotate in the opposite direction, quickly returning to the original locked position. At the same time, the first contact surface 311 re-engages with the limiting block 121, thereby assisting in the reset of the locking mechanism 3, so that the frame can immediately return to the locked state when unfolded.

[0063] The elastic element that enables the automatic reset of the locking component 31 is not limited to a torsion spring. Equivalent alternatives include, but are not limited to: using a tension spring in conjunction with a lever arm to convert linear tension into reset torque; using a leaf spring or disc spring to provide pressure or torque; using an elastic material with memory properties (such as shape memory alloys or highly elastic polymers) to directly or indirectly drive the locking component 31 to reset; and even using magnetic components (such as the repulsive force between permanent magnets) to provide a non-contact reset force. As long as the adopted solution can achieve the core reset function of automatically and reliably driving the locking component 31 back to the preset initial locking position after it has been displaced due to unlocking, it falls within the equivalent replacement scope of the third reset component 43.

[0064] Positioning the release element 32 at the end of the locking element 31 near the second contact surface 312 is a carefully selected force point. This is not an arbitrary arrangement, but an optimized application based on the lever principle. The locking element 31 can be considered as a lever with the rotating part 313 as the fulcrum. The point of action (i.e., the force point) of the release element 32 is located at the end near the second contact surface 312 (i.e., the resistance point, where the resistance comes from the pressure and friction of the limiting block 121). According to the lever principle, with the fulcrum position fixed, the farther the force point is from the fulcrum, the smaller the driving force required. Placing the release element 32 at the end away from the fulcrum (rotating part 313) means that a smaller force (from the seat-driven release element 32) can overcome a larger locking resistance, thus achieving a significant effort-saving effect. At the same time, the direction of movement of the release element 32 (such as linear push-pull or swing) can be easily converted into a precise angle of rotation of the locking element 31 around its center of rotation, which is just enough to disengage the first contact surface 311 and initiate the guiding procedure of the second contact surface 312.

[0065] Understandably, there are various equivalent variations in the specific construction for achieving this rotational unlocking and lever-based force-saving principle. The cooperation between the rotating part 313 and the rotating seat 15 can be a shaft and bearing hole, or a hinge pin and fork lug. The position of the rotation center can be in the middle of the locking member 31 or closer to the first contact surface 311. Different positions will affect the force-saving ratio and the stroke, but the core lever principle remains unchanged. The unlocking member 32 can function by direct pushing, rope traction, or actuation via an intermediate swing arm. As long as the basic structure of the design satisfies that the locking member 31 is connected to the frame joint seat 11 through a clearly defined rotating joint, forming a lever with the rotating joint as the fulcrum, and the unlocking member 32 acts on the lever's lever arm end to drive its rotation, thereby unlocking and activating the guiding function, all of these are reasonable extensions of the technical solution of this utility model.

[0066] Specifically, the first contact surface 311 and the second contact surface 312 are constructed on the upper part of the locking member 31. A stop post 5 for limiting and guiding the rotation direction of the locking member 31 is provided on the side of the locking member 31 away from the second contact surface 312, and the stop post 5 is located at the lower part of the locking member 31. This specific construction adds precise mechanical hard limiting and trajectory guidance to the rotational movement of the locking member 31, which forms a constraint on the degree of rotational freedom, ensuring the stability and repeatability of the mechanism under extreme conditions. In the prior art, the rotation angle is usually defined only by the balance position of the return spring or the cooperation between the locking tongue and the slot. When subjected to abnormal external force impact or spring failure, there may be a risk of over-travel rotation, leading to misalignment, failure, or even damage to the mechanism. This utility model, by providing a stop post 5 on the lower part of the locking member 31 on the opposite side from the second contact surface 312, and cooperating with the corresponding structure on the locking member 31, physically defines a clear mechanical boundary for the rotational stroke of the locking member 31.

[0067] Understandably, there are various equivalent variations in the specific construction for achieving this hard limiting and guiding function. The stop post 5 is not necessarily a circular cylinder; it can be a square cylinder, an elliptical cylinder, or an irregularly shaped protrusion with a guide ramp. It can be integrally formed with the frame joint seat 11 or installed as a separate part. The lower structure of the locking member 31 that cooperates with the stop post 5 can be a simple plane, a groove, a slope, or an arc-shaped contour that surrounds part of the stop post 5. Their cooperation relationship can be surface contact or line contact. The fact that the stop post 5 is located on the side away from the second contact surface 312 means that it mainly restricts the rotation of the locking member 31 in the direction opposite to the unlocking direction (i.e., the over-locking direction). However, it is entirely understandable that in some other embodiments of this utility model, stop posts 5 can be provided on both sides of the rotation trajectory of the locking member 31 to achieve bidirectional hard limiting. Admittedly, in fact, this utility model can form a limiting function through the rotating seat 15 itself, which is used here as a further consideration to introduce the stop post 5. As long as the design satisfies the requirement of mechanically limiting the rotation angle range by cooperating with the structure on the rotating locking member 31 through a stop post 5 fixed on the base, it is a reasonable alternative design to achieve the same protection function.

[0068] More specifically, the locking member 31 has a stepped portion 314 at the end of the first contact surface 311 away from the second contact surface 312. The stepped portion 314 is configured to prevent the limiting block 121 from sliding in a non-predetermined direction. The introduction of the stepped portion 314 enhances the locking security, forming a mechanical barrier to prevent the limiting block 121 and the handlebar rotator 12 from malfunctioning or slipping in the opposite direction. Considering conventional techniques in the art, the locking member 31 may only provide a unidirectional receiving surface (the first contact surface 311). If the handlebar rotator 12 is subjected to an unexpected reverse force (e.g., hitting an obstacle while pushing or being turned in the opposite direction when not in a retracted state), there is a risk that the limiting block 121 may accidentally disengage from the locking contact surface, resulting in the frame folding unexpectedly and posing a safety hazard. This invention creates a physical cliff or high wall by setting a step portion 314 at the other end of the first contact surface 311 away from the second contact surface 312 (i.e., the side opposite to the starting end of the guide slope), thus eliminating the possibility of the limiting block 121 sliding in a non-predetermined direction (i.e., the direction opposite to the unlocking and closing direction) from the design source.

[0069] Of course, there are various equivalent variations in the specific construction for achieving this one-way blocking function. The step portion 314 can be a raised vertical wall or a steep surface with a large angle of inclination, the core of which is to provide a sufficiently large normal reaction force along the non-predetermined sliding direction. It can be a protrusion integrally formed with the locking member 31 or an independent stop added later. Its position and height design must ensure that it can completely cover the displacement stroke of the limiting block 121 in the non-predetermined direction. In some other embodiments, this function can be achieved by a resiliently resettable latch or pawl, which normally pops out to form a block, and is only pressed down or pushed open when properly unlocked, but this increases complexity. As long as the basic principle of the design satisfies the requirement of setting a rigid blocking structure on the non-guided side of the first contact surface 311 of the locking member 31 to physically prevent the limiting block 121 from sliding in directions other than the predetermined closing direction, they are all equivalent technical means to achieve the same safety guarantee effect.

[0070] In some embodiments of this invention, in conjunction with the operation of the drive member 21, the frame joint seat 11 defines an axially open port 16. The release member 32 extends at least partially from the frame joint seat 11 through the port 16, thereby forming mechanical contact with the drive member 21. The at least portion of the release member 32 extending from the port 16 is constructed as a block that gradually narrows outwards with respect to the extension direction of the port 16. Based on conventional techniques in the art, similar trigger interfaces might simply involve a vertical collision between a cylinder and a plane, which is prone to impact and noise at the moment of contact and requires extremely high assembly precision; even slight deviations can lead to poor contact or jamming. This invention, by constructing the portion of the release member 32 extending from the port 16 as a block that gradually narrows outwards with respect to the extension direction (e.g., a wedge-shaped head, a conical head, or a pyramidal head), creates a contact end with self-guiding and force line optimization characteristics. It is foreseeable that the specific structure of the release member 32 can be approximated by referring to the drive member 21.

[0071] Understandably, there are various equivalent evolutions in the specific form that achieves this optimized contact function. The outwardly tapering block can be a regular square pyramid or cone, a wedge (narrowing only in a specific direction), a prism with a spherical crown at the top, a tapering body with a complex curved surface, etc. The starting point and slope of the narrowing of the portion of the release member 32 extending through the through-hole 16 can be adjusted according to the required guide stroke and force transmission angle. The through-hole 16 itself can also be designed as a non-circular hole that matches the narrowing shape of the release member 32 to limit the rotation of the release member 32 and ensure its directionality. As long as the design satisfies the requirement that the end of the release member 32 used to contact the drive member 21 is constructed with a shape that decreases in size along the extension direction to provide guidance and optimize the direction of force transmission during contact, it is an equivalent alternative design that achieves the same interface performance.

[0072] In some embodiments of this invention, the handle rotating component 12 and the foot tube rotating component 13 are respectively provided with a first rotation limiting structure 122 and a second rotation limiting structure 131 for defining the rotatable angle. The first rotation limiting structure 122 is constructed as a groove recessed inward from the contour of the handle rotating component 12, while the second rotation limiting structure 131 is constructed as a groove formed inside the foot tube rotating component 13. Limiting pins 6 are provided within both the first and second rotation limiting structures 122 and 131. Simultaneously, the first and second rotation limiting structures 122 and 131 define the rotation angle range through mechanical contact with the limiting pins 6. Based on conventional techniques in the art, limiting the rotation angle may rely on simple surface contact collisions between components, or on weak baffles that are prone to deformation after multiple impacts. This invention, by integrating specially designed grooves as rotation limiting structures on the handle rotating component 12 and the foot tube rotating component 13, transforms the limitation of the rotation range into a sliding termination guided by the contour, which is a durable and precise limiting method. The geometry of the groove (length, curvature) directly and uniquely determines the maximum angle of motion of the rotating part 313. When engaged with the limiting pin 6 (or similar protrusion) fixed to the frame joint seat 11, the pin slides within the groove until it reaches the end of the groove, at which point the rotation is precisely terminated. This ensures that after each folding, the handlebars and foot tubes reach the predetermined, identical final position, resulting in a consistently compact folded form that facilitates storage and carrying.

[0073] Understandably, there are a wide range of equivalent alternatives for the specific construction of this type of slide groove limiting function. The shape of the slide groove can be: open groove (U-shaped or C-shaped groove with an opening at the edge of the rotating part), closed groove (complete hole groove or tunnel inside), curved groove (the trajectory is a simple arc or curve), compound groove (composed of multiple line segments with different curvatures), etc.

[0074] The limiting pin 6 that cooperates with it can be a cylindrical pin, a roller, a bearing, etc., and the arrangement position of the slide groove can also be adjusted, for example, it can be set on the side, end face, or internal rib of the rotating part. As long as the basic principle of the design satisfies the mechanical limitation of the rotation angle by the specific contour slide groove set on the rotating part cooperating with the protrusion on the fixed base, and the protrusion sliding against the end of the slide groove during relative rotation, it belongs to the equivalent technical means to achieve the same precise limiting function. In addition, the slide grooves of the first and second rotation limiting structures 131 can be designed to be linked, so that the closing angle of the handle and the foot tube mutually restrict each other, further optimizing the overall closing shape.

[0075] The following content serves as an explanation of the working principle of this utility model:

[0076] The core working principle of the seat-linked folding stroller frame proposed in this utility model lies in transforming the conventional folding action of the seat assembly 2 into a coherent process that triggers and drives the entire frame structure 1 to automatically fold. When the user needs to fold the stroller, the main operation performed is simply to apply an intuitive displacement to the seat assembly 2—usually a rotational fold or a sliding motion. During this process, the drive component 21 (e.g., a narrow block with a bidirectional inclined drive surface) fixedly integrated on the seat assembly 2 moves accordingly. When the seat assembly 2 moves to a preset stroke, the drive end 212 of the drive component 21 contacts and interacts with the release component 32 (e.g., a narrow end with a self-guiding function) extending from the opening 16 of the frame joint seat 11. The force applied by the drive component 21 is transmitted through the release component 32 and converted into torque that drives the locking component 31 to rotate around its rotating seat 15.

[0077] The rotational movement of the locking member 31 changes the position of its first contact surface 311 (the platform originally used to support the upper limit block 121 of the handlebar rotator 12), thereby releasing the constraint on the limit block 121. Simultaneously, the second contact surface 312 (a downwardly extending inclined surface) smoothly connected to the first contact surface 311 rotates to a predetermined position. Once the constraint is released, the limit block 121 on the handlebar rotator 12, aided by the frame's own weight or the built-in first reset component 41 (torsion spring), begins to slide along the first contact surface 311 towards the second contact surface 312. When the limit block 121 slides into the second contact surface 312, the geometric constraint of the inclined surface efficiently converts the linear sliding tendency of the limit block 121 into a rotational torque that drives the handlebar rotator 12 to rotate around the frame joint seat 11, thereby automatically initiating the folding of the frame.

[0078] The rotation of the handlebar rotator 12 is synchronously transmitted to the foot tube rotator 13 via the linkage 14 (such as a connecting rod), driving both to rotate in the folding direction. The first rotation limiting structure 122 and the second rotation limiting structure 131 (such as the cooperation between the slide and the limiting pin 6) precisely define the final folding angle of both, ensuring a compact and consistent shape. During the entire folding process, the first reset component 41 and the second reset component 42 (torsion spring) are compressed or released. Their energy storage and release processes optimize the operating feel and help maintain the folded posture. Thus, through a single operation of the seat assembly 2, the synchronous and linked folding of the frame and seat is achieved, integrating the originally separate multi-step operations into a smooth, effortless, and safe continuous action, significantly improving the portability and ease of use of the stroller.

[0079] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A stroller with a seat-linked folding frame, comprising a frame structure (1), a seat assembly (2), and a locking mechanism (3), wherein the frame structure (1) includes a frame joint seat (11) and a handlebar rotator (12) and a foot tube rotator (13) rotatably engaged with the frame joint seat (11), the handlebar rotator (12) and the foot tube rotator (13) being configured to fold the frame structure (1), and a linkage (14) being provided between the handlebar rotator (12) and the foot tube rotator (13), the linkage (14) being configured to drive the foot tube rotator (13) to rotate after the handlebar rotator (12) rotates, characterized in that: The seat assembly (2) is movably disposed on the frame structure (1) and includes a drive member (21). The locking mechanism (3) includes a locking member (31) and a releasing member (32). The locking member (31) is configured to prevent the handlebar rotator (12) from rotating. The releasing member (32) is configured to release the locking member (31) after the seat assembly (2) moves relative to the frame structure (1) and is acted upon by the drive member (21), thereby allowing the handlebar rotator (12) to rotate.

2. The stroller as described in claim 1, characterized in that: The seat assembly (2) defines a receiving chamber (22) with an axial opening. The drive (21) includes a mounting end (211) at least partially disposed within the receiving chamber (22) and a drive end (212) extending from the receiving chamber (22) for contacting the operation of the release member (32).

3. The stroller as described in claim 2, characterized in that: The seat assembly (2) is rotatably mounted relative to the frame structure (1). The drive end (212) is constructed as a block that gradually narrows in the direction of the accommodating chamber (22). The two sides of the block that gradually narrow are defined as a first drive surface (2121) and a second drive surface (2122) that are inclined relative to the opening direction of the accommodating chamber (22). The first drive surface (2121) and the second drive surface (2122) are configured to abut against and act on the release member (32) from the clockwise direction and the counterclockwise direction, respectively, thereby unlocking the frame structure (1).

4. The stroller as described in claim 3, characterized in that: The seat assembly (2) includes an arcuate portion (23) extending in a circumferential direction. The arcuate portion (23) is provided with the accommodating chamber (22). Meanwhile, the first driving surface (2121) and the second driving surface (2122) of the drive end (212) are arranged along the extension direction of the arcuate portion (23), so that the first driving surface (2121) and the second driving surface (2122) form an inclination relative to the horizontal radial direction of the frame joint seat (11).

5. The stroller as described in claim 1, characterized in that: The handle rotating member (12) is provided with a limiting block (121), and the locking member (31) includes a first contact surface (311) and a second contact surface (312) that are in contact. The first contact surface (311) is configured to receive the limiting block (121) at its bottom, thereby preventing the handle rotating member (12) from moving. The second contact surface (312) is located at one end of the first contact surface (311) and extends downward toward the first contact surface (311). The limiting block (121) is configured to slide along the first contact surface (311) after the locking member (31) is deflected by the unlocking member (32), and continue to slide along the direction of the second contact surface (312) after reaching the second contact surface (312), thereby forming the rotation and retraction of the handle rotating member (12).

6. The stroller as described in claim 5, characterized in that: The frame joint seat (11) is provided with a rotating seat (15), and the locking member (31) includes a rotating part (313). The locking member (31) is rotatably connected to the rotating seat (15) through the rotating part (313). The rotating seat (15) is configured to define the rotation center of the locking member (31) so that the locking member (31) rotates after being acted upon by the release member (32). At the same time, the release member (32) is provided at one end of the locking member (31) near the second contact surface (312).

7. The stroller as described in claim 6, characterized in that: The first contact surface (311) and the second contact surface (312) are constructed on the upper part of the locking member (31). The locking member (31) is provided with a stop post (5) on the side away from the second contact surface (312) for limiting and guiding the rotation direction of the locking member (31), and the stop post (5) is provided on the lower part of the locking member (31).

8. The stroller as described in any one of claims 5 to 7, characterized in that: The locking member (31) has a step portion (314) at the other end of the first contact surface (311) away from the second contact surface (312), and the step portion (314) is configured to prevent the limiting block (121) from sliding in a non-predetermined direction.

9. The stroller as described in any one of claims 1 to 7, characterized in that: The frame joint seat (11) defines an axially open opening (16), and the release member (32) extends at least partially from the frame joint seat (11) through the opening (16) to form mechanical contact with the drive member (21). At least part of the structure of the release member (32) extending from the opening (16) is configured as a block that gradually narrows outward with respect to the direction of the opening (16).

10. The stroller as described in any one of claims 1 to 7, characterized in that: The handle rotator (12) and the foot tube rotator (13) are respectively provided with a first rotation limiting structure (122) and a second rotation limiting structure (131) for defining the rotatable angle. The first rotation limiting structure (122) is constructed as a groove recessed inward from the contour of the handle rotator (12), while the second rotation limiting structure (131) is constructed as a groove formed inside the foot tube rotator (13).

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