A linkage mechanism for step folding of a stroller and a stroller

Abstract

The utility model discloses a kind of for step-by-step stowage linkage mechanism and perambulator, and the utility model technical scheme includes first joint seat, second joint seat, linkage joint seat, seat group and release lock component.Second joint seat is equipped with driving effect part, by the relative rotation of first joint seat and second joint seat, driving effect part and release lock component interact, drive release lock component to push joint locking assembly, to automatically release the locking of seat group.The utility model decomposes into "car frame unlocking" and "seat unlocking" two consecutive steps by stowage process, solve the technical problem that the impact force is too large, operation smoothness and user body feeling difference caused by simultaneous unlocking car frame and seat in prior art single impact.It is beneficial to have the effect that the stowage operation is smooth and user body feeling is good.

Description

Technical Field

[0001] This utility model relates to the field of infant and child product technology, and in particular to a linkage mechanism for step-by-step folding of a stroller and a stroller. Background Technology

[0002] As an essential tool for infants and toddlers' daily outings, the convenient storage and carrying functions of strollers have always been a key focus in the design field. Among them, one-button folding technology, which can be folded up with a single operation (such as a bump), has become the mainstream development direction in the market because it greatly enhances the user experience.

[0003] Currently, there are various stroller frame designs on the market that achieve automatic folding through impact. The linkage mechanism of such designs is usually configured such that when the user applies a single downward pressure, the impact force simultaneously triggers the internal linkage mechanism, releasing the locks on both the frame body and the seat mechanism in one action step, thereby completing the overall folding of the frame and seat in one step.

[0004] However, existing crash-based vehicle retraction technology has a significant drawback. Because existing technology requires the simultaneous unlocking of the frame and seat in a single impact, the required impact force is too large, resulting in technical defects such as poor smoothness of the retraction operation and poor user experience. Utility Model Content

[0005] The main purpose of this utility model is to propose a linkage mechanism for step-by-step vehicle retraction, which aims to solve the technical problem that the existing technology requires the simultaneous unlocking of the frame and seat in a single impact, resulting in excessive impact force, poor smoothness of vehicle retraction operation and poor user experience.

[0006] To achieve the above objectives, this utility model proposes a linkage mechanism for step-by-step vehicle retraction, comprising:

[0007] First joint seat;

[0008] The second joint seat is rotatably connected to the first joint seat and is provided with a driving part;

[0009] The linkage seat is fixedly connected to the first joint seat and rotates synchronously with it;

[0010] The seat assembly is equipped with a joint locking component between itself and the linkage seat;

[0011] The locking component is movably disposed on the linkage seat and / or the first joint seat;

[0012] Specifically, after the first joint seat rotates relative to the second joint seat, the linkage joint seat drives the interaction between the driving part and the unlocking part, causing the driving part to drive the unlocking part to push the joint locking assembly, thereby unlocking the seat assembly.

[0013] Furthermore, the linkage joint seat includes a connecting base and a through hole. The connecting base is fixedly connected to the first joint seat, and the connecting base is provided with a linear groove. The through hole is located at the end of the linear groove facing the seat assembly. The release component includes a movable part and a rotating part. The release component is configured such that after the rotating part is acted upon by the driving part, the movable part moves against the linear groove, triggering the release of the joint locking assembly.

[0014] Furthermore, a linear groove is provided on the surface of the connecting base and is arranged in the extending direction of the connecting base. There are at least two linear grooves, of which at least one linear groove has a through hole at its end facing the seat assembly. The movable part includes a trigger end and a balance end. The trigger end is slidably provided on the linear groove corresponding to the through hole and is configured to push the joint locking assembly when it moves to the position of the through hole. The balance end is slidably provided on the other linear groove and is configured to move synchronously with the trigger end to balance the movement trajectory of the release component.

[0015] Furthermore, the trigger end is a protruding structure extending toward the linear groove, while the balance end is a block that fits into the linear groove.

[0016] Furthermore, the first joint seat has a locking body at one end facing the linkage joint seat. The locking body engages with the linear groove from the end direction of the connecting base. At the same time, the locking body is configured to abut against the release member from the starting end of the linear groove to limit the release member.

[0017] Furthermore, a first reset component for resetting the release component is provided between the linkage seat and the release component. The first reset component is configured to push back the release component after the release component is pushed toward the joint locking assembly.

[0018] This utility model also proposes a stroller, including a handlebar assembly and a foot tube assembly. The handlebar assembly includes an upper handlebar tube, a lower handlebar tube, and a handlebar joint seat. The upper handlebar tube can slide down relative to the extension direction of the lower handlebar tube. The foot tube assembly includes a front foot assembly, a rear foot assembly, and a foot tube joint seat. A frame locking assembly is provided between the handlebar joint seat and the foot tube joint seat. The frame locking assembly is configured such that an axial impact of the upper handlebar tube along the lower handlebar tube triggers the release of the handlebar joint seat and the foot tube joint seat. It also includes the aforementioned linkage mechanism, wherein the first joint seat is the handlebar joint seat, and the second joint seat is the foot tube joint seat.

[0019] Furthermore, the frame locking assembly includes a middle component, a transmission component, and a locking gear. The transmission component has a rotary transmission part that can abut against the locking gear. The frame locking assembly is configured such that after the upper handlebar tube impacts the middle component along the axial direction of the lower handlebar tube, the middle component transmits a force to the transmission component. The transmission component rotates and pushes the locking gear into the first joint seat through the rotary transmission part to release the first joint seat and the second joint seat.

[0020] Furthermore, the rotary transmission unit is an inclined block, and the locking gear is provided with an inclined groove. The rotary transmission unit is configured to push the locking gear to move horizontally after it extends into the inclined groove and rotates.

[0021] Furthermore, a second reset component for resetting the locking gear is provided between the locking gear and the first joint seat. The second reset component is configured to push the locking gear back after the locking gear extends into the first joint seat.

[0022] This utility model includes a first joint seat, a second joint seat, a linkage joint seat, a seat assembly, and a release component. The second joint seat is equipped with a driving mechanism. Through the relative rotation of the first and second joint seats, the driving mechanism interacts with the release component, driving the release component to push against the joint locking assembly, thereby automatically releasing the seat assembly from locking. This utility model solves the technical problems of excessive impact force, poor operational smoothness, and poor user experience caused by the need to unlock both the frame and seat simultaneously in a single impact, by breaking down the folding-out process into two consecutive steps: "frame unlocking" and "seat unlocking." This utility model offers the advantages of high folding-out operation smoothness and a good user experience. Attached Figure Description

[0023] Figure 1 A three-dimensional structural diagram of a baby stroller;

[0024] Figure 2 This is a schematic diagram showing the engagement of the first joint seat, the second joint seat, and the linkage joint seat;

[0025] Figure 3 Schematic diagram of the disassembly and assembly of the first joint seat, the second joint seat, and the linkage joint seat. Figure 1 ;

[0026] Figure 4 Schematic diagram of the disassembly and assembly of the first joint seat, the second joint seat, and the linkage joint seat. Figure 2 ;

[0027] Figure 5 3D structure breakdown of the hand-held tube assembly Figure 1 ;

[0028] Figure 6 3D structure breakdown of the hand-held tube assembly Figure 2 ;

[0029] Figure 7 An exploded 3D view of the frame locking assembly;

[0030] Figure 8 This is a three-dimensional structural diagram of the second joint seat;

[0031] Figure 9A three-dimensional structural diagram of the unlocking component;

[0032] Figure 10 This is a three-dimensional structural diagram of the linkage joint seat;

[0033] Figure 11 This is a schematic diagram of the planar structure of the linkage seat;

[0034] Figure 12 This is a three-dimensional structural diagram of the first joint seat.

[0035] The above figures include the following reference numerals:

[0036] 1. First joint seat; 11. Engaging body; 12. First engagement point; 2. Second joint seat; 21. Driving actuating part; 3. Linking joint seat; 31. Connecting base; 311. Linear groove; 312. Second engagement point; 32. Through hole; 4. Seat assembly; 5. Release component; 51. Movable part; 511. Trigger end; 512. Balance end; 52. Rotating part; 6. First reset component; 7. Second reset component; 8. Handle tube assembly; 81. Upper handle tube; 82. Handlebar lower tube; 821. Socket; 83. Impact component; 84. Button; 85. Rope; 9. Foot tube assembly; 91. Front foot assembly; 92. Rear foot assembly; 10. Frame locking assembly; 101. Intermediate component; 1011. First drive surface; 1012. Second drive surface; 102. Drive component; 1021. Rotary drive unit; 1022. Drive ring; 1023. Notch; 103. Locking gear; 1031. Angled groove; 1032. Open chamber. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] This utility model proposes a linkage mechanism for step-by-step vehicle retraction.

[0041] In this embodiment of the utility model, such as Figures 1 to 12 As shown, the linkage mechanism includes a first joint seat 1, a second joint seat 2, a linkage joint seat 3, a seat assembly 4, and a release component 5. The first joint seat 1 and the second joint seat 2 are rotatably connected, and the second joint seat 2 is provided with a driving actuation part 21. The linkage joint seat 3 is fixedly connected to the first joint seat 1 and rotates synchronously with it. A joint locking assembly is provided between the seat assembly 4 and the linkage joint seat 3. The release component 5 is movably disposed on the linkage joint seat 3 and / or the first joint seat 1. Wherein, after the first joint seat 1 rotates relative to the second joint seat 2, the linkage joint seat 3 drives the interaction between the driving actuation part 21 and the release component 5, causing the driving actuation part 21 to drive the release component 5 to push against the joint locking assembly, thereby releasing the seat assembly 4.

[0042] It is worth noting that this utility model preferably uses a frame (handlebar) impact mode as the unlocking trigger for the first joint seat 1 and the second joint seat 2. This part is not actually the focus of this utility model's discussion; it is mainly used to more clearly demonstrate the working principle of this utility model by utilizing a relatively common frame (handlebar) impact mode. This part can also be implemented using other conventional methods known to those skilled in the art, such as using steel cable pin linkage or gear linkage. It should be noted that this utility model contains a novel inventive concept in its specific description of the frame (handlebar) unlocking trigger, and this part is also within the protection scope of this utility model.

[0043] In existing technologies, stroller linkage mechanisms typically employ a single-trigger linkage mechanism. Taking the commonly used frame (handlebar) impact unlocking mechanism in the stroller industry as an example, in a single downward press of the handlebar, the impact force must simultaneously overcome the resistance of both the frame lock and the seat lock to complete the overall folding. This one-step unlocking method directly superimposes the resistance of the two locks, resulting in excessive impact force required from the user and a poor user experience. Compared to existing technologies, the core improvement of this invention lies in decomposing the folding process into two sequentially triggered steps. Specifically, again using the frame (handlebar) impact unlocking as an example, a single axial impact applied by the user to the handlebar will first and only trigger the frame locking assembly 10, releasing the lock between the second joint seat 2 and the first joint seat 1, achieving initial unlocking and folding rotation of the frame. Then, during this rotation, the driving part 21 on the second joint seat 2 interacts with the unlocking component 5 fixed in the linkage joint seat 3 of the first joint seat 1, driving the unlocking component 5 to push against the joint locking assembly, thereby automatically releasing the seat assembly 4 from lock. Therefore, this invention, through a step-by-step unlocking mechanism, breaks down the enormous impact force that would otherwise be applied all at once into two consecutive and effortless action steps. This reduces the instantaneous impact force required for folding the bike, resulting in a more effortless, smooth, and reliable folding process. Simultaneously, because the seat does not immediately unlock when the frame is unlocked, it does not tilt instantly, reducing the risk of misuse by children and fundamentally improving the user experience.

[0044] In some embodiments of this utility model, a simple assembly structure for the linkage joint seat 3 is proposed to improve the assembly of the prior art and produce the beneficial effect of simpler assembly compared with the prior art: the linkage joint seat 3 includes a connecting base 31 and a through hole 32. The connecting base 31 is fixedly connected to the first joint seat 1, and the connecting base 31 is provided with a linear groove 311. The through hole 32 is located at the end of the linear groove 311 facing the seat assembly 4. The release component 5 includes a movable part 51 and a rotating part 52. The release component 5 is configured such that after the rotating part 52 is driven by the driving part 21, the movable part 51 moves against the linear groove 311 to trigger the release of the joint locking assembly.

[0045] Specifically, a specific structure of the driving part 21 and the rotating part 52 is proposed here to form a better fit as a preferred embodiment. The driving part 21 is a wedge block and the rotating part 52 is a groove that abuts against the wedge block. Compared with the regular geometric fit commonly used in the prior art, the rotational action of the driving part 21 and the rotating part 52 is closer through the irregular surface abutment fit constructed by the wedge block and the groove.

[0046] Specifically, the linear groove 311 is provided on the surface of the connecting base 31 and is arranged in the extending direction of the connecting base 31. The linear groove 311 on the surface of the connecting base 31 reduces the manufacturing difficulty during industrial production. At the same time, the linear groove 311, as an open structure on the surface of the connecting base 31, is also conducive to the mating of parts. In some preferred embodiments of this utility model, at least two linear grooves 311 are provided, wherein at least one linear groove 311 has a through hole 32 corresponding to its end facing the seat assembly 4. This linear groove 311 and the through hole 32 are connected to the joint locking assembly. The movable part 51 includes a trigger end 511 and a balance end 512. The trigger end 511 is slidably provided on the linear groove 311 corresponding to the through hole 32 and is configured to push the joint locking assembly when it moves to the position of the through hole 32. The balance end 512 is slidably provided on the other linear groove 311 and is configured to move synchronously with the trigger end 511 to balance the movement trajectory of the release component 5.

[0047] More specifically, a specific construction of the trigger end 511 and the balance end 512 is proposed here as a preferred embodiment to better cooperate with the linear groove 311 and produce the beneficial effect of smooth operation: the trigger end 511 is a protruding structure extending toward the linear groove 311, while the balance end 512 is a block that fits into the linear groove 311.

[0048] More specifically, a specific construction of the linear groove 311 and the trigger end 511 is proposed herein to form a better fit as a preferred embodiment. The bottom of the linear groove 311 is raised upward and arc-shaped, and the trigger end 511, which abuts against the bottom of the linear groove 311, is recessed inward and arc-shaped (the concavity is upward from the direction shown in the figure). Understandably, the arc-shaped structural fit can make the movement smoother and can effectively reduce friction and wear.

[0049] In some embodiments of this utility model, compared to the prior art, in order to enhance the smoothness of rotation between the linkage joint seat 3 and the first joint seat 1, the connection form between the linkage joint seat 3 and the first joint seat 1 is defined as a locking mechanism. Specifically, the first joint seat 1 is provided with a locking body 11 at one end facing the linkage joint seat 3, and the locking body 11 engages with the linear groove 311 from the end direction of the connecting base 31; at the same time, the locking body 11 is configured to abut against the release member 5 from the starting end of the linear groove 311 to limit the release member 5. It can be understood that through the cooperation of the locking body 11 and the linear groove 311, the release member 5 will be restricted to move within the range of the linear groove 311, and this structure has the beneficial effect of strong stability.

[0050] Specifically, in order to further enhance the smoothness of rotation between the linkage joint seat 3 and the first joint seat 1, the linkage joint seat 3 and the first joint seat 1 can also be connected by a locking point. More specifically, the locking point is located at the end of the connecting base 31 and is parallel to the first joint seat 1. The first joint seat 1 is provided with a first locking point 12, and the linkage joint seat 3 is provided with a second locking point 312.

[0051] In some embodiments of this utility model, a first reset component 6 for resetting the release component 5 is provided between the linkage joint seat 3 and the release component 5. The first reset component 6 is configured to push back the release component 5 after it is pushed towards the joint locking assembly. Specifically, in stroller frames, an elastic return scheme is generally adopted to return parts to their positions. In some preferred embodiments of this utility model, the first reset component 6 is a spring, which is more suitable from the perspective of assembly and cost. In some other embodiments of this utility model, the first reset component 6 can also be replaced by an equivalent component with the same elasticity, such as rubber, sponge, or elastic fiber. As for what constitutes an elastic component, this is prior art, and can be referred to in the prior art section.

[0052] This utility model also proposes a baby stroller, such as Figure 1 As shown, the stroller includes the aforementioned linkage mechanism, wherein the first joint seat 1 is a handlebar joint seat, and the second joint seat 2 is a leg tube joint seat. Specifically, it also includes a handlebar tube assembly 8, a leg tube assembly 9, and a folding linkage mechanism. The handlebar tube assembly 8 includes an upper handlebar tube 81 and a lower handlebar tube 82, and the first joint seat 1. The upper handlebar tube 81 can slide down relative to the extending direction of the lower handlebar tube 82. The leg tube assembly 9 includes a front leg assembly 91 and a rear leg assembly 92, and the second joint seat 2. A frame locking assembly 10 is provided between the second joint seat 2 and the first joint seat 1. The frame locking assembly 10 is configured to release the second joint seat 2 and the first joint seat 1 by an axial impact of the upper handlebar tube 81 along the lower handlebar tube 82. The folding linkage mechanism includes a seat assembly 4 and a linkage joint seat 3. Seat assembly 4 is mounted on linkage seat 3, and a joint locking assembly is provided between seat assembly 4 and linkage seat 3. Linkage seat 3 is fixedly connected to first joint seat 1 and rotates synchronously with first joint seat 1. Meanwhile, a release component 5 is provided between linkage seat 3 and second joint seat 2. Second joint seat 2 is provided with a driving actuation part 21, which is configured to drive the release component 5 to push the joint locking assembly after linkage seat 3 rotates relative to second joint seat 2 and drives the release component 5 to move, thereby releasing seat assembly 4. Since this stroller adopts all the technical solutions of all embodiments of the above-described linkage mechanism, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated further here.

[0053] In embodiments of this invention, regarding the impact portion of the handlebar tube assembly 8, the upper handlebar tube 81 can directly act on the frame locking assembly 10 via its integrally formed bottom structure, or the upper handlebar tube 81 can indirectly act on the frame locking assembly 10 via an impact member 83 provided at its bottom. The impact portion is not the focus of this invention; in specific embodiments, both direct and indirect impact methods can be used. Understandably, indirect impact provides better stability than direct impact, as shown in the attached diagram. Figure 5 and attached Figure 6 The diagram shown is a schematic of an indirect impact structure and is for reference only.

[0054] In some embodiments of this utility model, the upper handle tube 81 and the lower handle tube 82 are locked by a single-lock mechanism or a double-lock mechanism. The single-lock mechanism or double-lock mechanism is a prior art component. In the prior art, the upper handle tube 81 and the lower handle tube 82 are usually released by pressing a button 84, which causes the internal rope 85 to pull the locking pin. The button 84 and the locking pin have various configurations; typically, the button 84 is located on the upper handle tube 81 or on the tube between the two upper handle tubes 81. Simultaneously, the lower handle tube 82 has an insertion hole 821. When it is necessary to release the lock of the handle tube assembly 8 and the foot tube assembly 9, pressing the button 84 causes the rope 85 to release the locking pin that is movably inserted into the insertion hole 821. (See attached diagram) Figure 5 and attached Figure 6 In this case, the locking pin is located on the underside of the impact member 83. Since this part is not within the scope of protection of this utility model, it is only provided as supplementary information to facilitate understanding of the operation of this utility model.

[0055] In some embodiments of this utility model, a frame locking assembly 10 structure that is easy to trigger and release in conjunction with the handlebar tube assembly 8 is proposed, aiming to produce a more stable impact triggering effect. The frame locking assembly 10 includes an intermediate member 101, a transmission member 102, and a locking gear 103. The transmission member 102 is provided with a rotary transmission part 1021 that can abut against the locking gear 103. The frame locking assembly 10 is configured such that after the upper handlebar tube 81 impacts and contacts the intermediate member 101 along the axial direction of the lower handlebar tube 82, the intermediate member 101 transmits the force to the transmission member 102. The transmission member 102 rotates and pushes the locking gear 103 into the first joint seat 1 through the rotary transmission part 1021 to release the second joint seat 2 and the first joint seat 1.

[0056] Specifically, a cooperative structure of a rotary transmission part 1021 and a locking gear 103 is proposed here as a preferred embodiment to achieve a stronger transmission effect. The rotary transmission part 1021 is an inclined block, and the locking gear 103 is provided with an inclined groove 1031. The rotary transmission part 1021 is configured such that after it extends into the inclined groove 1031 and rotates, it pushes the locking gear 103 to move horizontally.

[0057] Specifically, a preferred embodiment of the cooperation structure between the intermediate component 101 and the transmission component 102 is proposed to achieve a stronger transmission effect. Firstly, according to the conventional methods of those skilled in the art, transmission is generally achieved through simple surface-to-surface transmission. However, in some embodiments of this invention, to enhance transmission efficiency, a structure for the intermediate component 101, different from existing technologies, is proposed. The intermediate component 101 includes a first transmission surface 1011 at the top and a second transmission surface 1012 at the bottom. The first transmission surface 1011 is wider than the second transmission surface 1012. The intermediate component 101 is configured such that after the bottom of the handle tube 81 abuts against the first transmission surface 1011, the drive is transmitted to the transmission component 102 via the second transmission surface 1012. It is understood that by setting the second transmission surface 1012, which is narrower than the first transmission surface 1011, it is beneficial to concentrate the force on the second transmission surface 1012, making the operation of the transmission component 102 smoother. Simultaneously, the transmission component 102 is also correspondingly improved. The transmission component 102 includes a transmission ring 1022 and a notch 1023. The transmission ring 1022 is a non-sealed ring, and the notch 1023 is the non-sealed position of the transmission ring 1022. The transmission component 102 is configured such that when the second transmission surface 1012 abuts against the notch 1023, the transmission ring 1022 drives the transmission component 102 to move, thereby causing the aforementioned rotary transmission part 1021 to act on the locking gear 103 to achieve unlocking.

[0058] More specifically, in order to make the intermediate component 101 and the transmission component 102 fit more tightly, the second transmission surface 1012 is constructed as an annular concave surface, and correspondingly, the notch 1023 is constructed as an annular convex surface. Through the assembly method of concave-convex fit, the fit between the second transmission surface 1012 and the notch 1023 can be improved, avoiding the situation of incomplete contact.

[0059] Understandably, in order to achieve the beneficial effect of tight assembly, the locking gear 103 is provided with an open cavity 1032 at an angle toward the intermediate member 101, into which the intermediate member 101 extends and engages with the transmission member 102. Compared to the prior art, the open cavity 1032 reduces the overall thickness of the joint and compresses the assembly.

[0060] In some embodiments of this utility model, a second reset component 7 for resetting the locking gear 103 is provided between the locking gear 103 and the first joint seat 1. The second reset component 7 is configured to push the locking gear 103 back after it extends into the first joint seat 1. Specifically, the second reset component 7 is preferably a spring. Further description of the second reset component 7 can be found in the first reset component 6.

[0061] In the aforementioned embodiments of this utility model, the main problem solved is the linkage and retraction between the handlebar assembly 8, the foot tube assembly 9, and the seat assembly 4. The retraction driving process between the handlebar assembly 8, the foot tube assembly 9, and the seat assembly 4 is decomposed into two independent steps, which is the key part of this utility model.

[0062] In embodiments of this invention, the joint locking component is an actuating element used to push the joint gear or other locking member of the corresponding connecting seat of the seat assembly 4 to release the seat assembly 4. Since this part is not within the scope of this invention, the construction of the joint locking component can be carried out by those skilled in the art using conventional methods, and will not be described in detail here.

[0063] The following content serves as an explanation of the working principle of this utility model:

[0064] When folding up the bike, the user first operates the single-lock or double-lock mechanism located on the handlebar tube assembly 8 (e.g., pressing button 84, pulling the locking pin via rope 85) to release the lock between the upper handlebar tube 81 and the lower handlebar tube 82. Then, a downward axial impact force is applied to the upper handlebar tube 81, which drives the frame locking assembly 10 to release the lock between the first joint seat 1 and the second joint seat 2, allowing the frame to begin folding and rotating around the joint point. During this rotation, the drive unit 21 fixed to the second joint seat 2 and the linkage joint seat 3 rotating with the first joint seat 1 generate relative movement. The drive unit 21 then drives the release component 5 provided on the linkage joint seat 3 to move along a predetermined trajectory (e.g., linear groove 311), thereby pushing the joint locking assembly and releasing the lock between the seat assembly 4 and the linkage joint seat 3. At this point, both the frame and seat are unlocked and can be folded up. The entire process breaks down the huge single impact force required to retract the vehicle into two clear and effortless steps: impact to unlock the frame and rotation to unlock the seat. This achieves the beneficial effects of reducing operational effort and improving the user experience.

[0065] 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 linkage for stepwise vehicle retraction, characterized by, include: First joint seat; The second joint seat is rotatably connected to the first joint seat and is provided with a driving part; The linkage seat is fixedly connected to the first joint seat and rotates synchronously with it; The seat assembly is equipped with a joint locking component between itself and the linkage seat; The locking component is movably disposed on the linkage seat and / or the first joint seat; Specifically, after the first joint seat rotates relative to the second joint seat, the linkage joint seat drives the interaction between the driving part and the unlocking part, causing the driving part to drive the unlocking part to push the joint locking assembly, thereby unlocking the seat assembly.

2. The linkage mechanism of claim 1, wherein: The linkage joint seat includes a connecting base and a through hole. The connecting base is fixedly connected to the first joint seat, and the connecting base is provided with a linear groove. The through hole is located at the end of the linear groove facing the seat assembly. The release component includes a movable part and a rotating part. The release component is configured such that after the rotating part is acted upon by the driving part, the movable part moves against the linear groove to trigger the release of the joint locking assembly.

3. The linkage of claim 2, wherein: A linear groove is provided on the surface of the connecting base and is arranged in the extending direction of the connecting base. There are at least two linear grooves, of which at least one linear groove has a through hole at its end facing the seat assembly. The movable part includes a trigger end and a balance end. The trigger end is slidably provided on the linear groove corresponding to the through hole and is configured to push the joint locking assembly when it moves to the position of the through hole. The balance end is slidably provided on the other linear groove and is configured to move synchronously with the trigger end to balance the movement trajectory of the release component.

4. The linkage of claim 3, wherein: The trigger end is a protruding structure extending toward the linear slot, while the balance end is a block that fits into the linear slot.

5. The linkage of claim 2, wherein: The first joint seat has a locking body at one end facing the linkage joint seat. The locking body engages with the linear groove from the end direction of the connecting base. At the same time, the locking body is configured to abut against the release member from the starting end of the linear groove to limit the release member.

6. The linkage of claim 2, wherein: A first reset component for resetting the release component is provided between the linkage seat and the release component. The first reset component is configured to push the release component back after the release component is pushed toward the joint locking assembly.

7. A stroller, comprising a handlebar assembly and a foot tube assembly, the handlebar assembly including an upper handlebar tube, a lower handlebar tube, and a handlebar joint seat, the upper handlebar tube being slidably slidable relative to the extending direction of the lower handlebar tube, the foot tube assembly including a front foot assembly, a rear foot assembly, and a foot tube joint seat, a frame locking assembly provided between the handlebar joint seat and the foot tube joint seat, the frame locking assembly being configured such that an axial impact of the upper handlebar tube along the lower handlebar tube triggers the release of the handlebar joint seat and the foot tube joint seat, characterized in that: It also includes the linkage mechanism described in any one of claims 1 to 6, wherein the first joint seat is a handle joint seat and the second joint seat is a foot tube joint seat.

8. The stroller of claim 7, wherein: The frame locking assembly includes a middle component, a transmission component, and a locking gear. The transmission component has a rotary transmission part that can abut against the locking gear. The frame locking assembly is configured such that after the top tube of the handlebar impacts the middle component along the axial direction of the bottom tube of the handlebar, the middle component transmits a force to the transmission component. The transmission component rotates and pushes the locking gear into the first joint seat through the rotary transmission part to release the first joint seat and the second joint seat.

9. The stroller of claim 8, wherein: The rotary transmission unit is an inclined block, and the locking gear is provided with an inclined groove. The rotary transmission unit is configured to push the locking gear to move horizontally after it extends into the inclined groove and rotates.

10. The stroller of claim 8, wherein: A second reset component for resetting the locking gear is provided between the locking gear and the first joint seat. The second reset component is configured to push the locking gear back after the locking gear extends into the first joint seat.

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