A foldable stroller

Abstract

This application discloses a foldable stroller, including a frame body, a push handle, and a locking mechanism for locking the push handle to the frame body; the push handle includes a push handle body and a linkage, the push handle body and the linkage are rotatably connected, and the linkage is rotatably connected to the frame body; the stroller has an unfolded state, a first folded state, and a second folded state; in the first folded state, the frame body and the linkage are folded, and a first angle is formed between the push handle body and the linkage; in the second folded state, the frame body and the linkage are folded, and a second angle different from the first angle is formed between the push handle body and the linkage; this application has two folding modes, and users can flexibly select and quickly switch between them according to real-time space and functional needs.

Description

Technical Field

[0001] This application relates to the field of children's vehicle technology, and more particularly to a foldable children's vehicle. Background Technology

[0002] In existing folding stroller designs, the push handle is restricted by linkage mechanisms such as the rear support rod during folding, preventing it from folding further inwards after reaching a certain position. This results in the push handle's final position being relatively outwards, leading to a still relatively large and not compact overall folded size for the stroller, making it inconvenient to fit in a car trunk or in a cramped space at home. Summary of the Invention

[0003] The purpose of this application is to provide a foldable stroller, in which the push handle is decomposed into a push handle body and a linkage, so that the stroller has two different folding forms with different compactness, and users can flexibly choose and quickly switch between them according to real-time space and functional needs.

[0004] The technical solution of this application is: a foldable stroller, including a frame body having an unfolded state and a folded state, a push handle, and a locking mechanism for locking the push handle to the frame body;

[0005] The push handle includes a push handle body and a linkage, the push handle body is rotatably connected to the linkage, and the linkage is rotatably connected to the frame body;

[0006] The stroller has an unfolded state, a first folded state, and a second folded state;

[0007] In the unfolded state, the frame body is unfolded, the push handle body and the linkage are in the unfolded position and are locked to the frame body by a locking mechanism;

[0008] In the first folded state, the frame body and the linkage are folded, and a first angle is formed between the push handle body and the linkage.

[0009] In the second folded state, the frame body and the linkage are folded, and a second angle different from the first angle is formed between the push handle body and the linkage.

[0010] As a preferred technical solution, the first included angle is consistent with the included angle between the push handle body and the linkage in the unfolded position.

[0011] As a preferred technical solution, a motion coupling structure is provided between the linkage and the push handle body, which can constrain the relative motion trajectory between the linkage and the push handle body.

[0012] As a preferred technical solution, the motion coupling structure includes a matching limiting groove and a limiting block; the limiting groove is disposed on the linkage or the push handle body, the limiting block is disposed on the push handle body or the linkage, and the limiting block is movably accommodated within the limiting groove.

[0013] As a preferred technical solution, when the frame body is folded from the unfolded state to the first folded state, the limiting block is driven to move from the second limiting end to the first limiting end in the limiting groove along the first direction, and then moves to the second limiting end along the second direction opposite to the first direction; when switching from the first folded state to the second folded state, the limiting block can move again from the second limiting end to the first limiting end along the first direction.

[0014] As a preferred technical solution, the limiting groove is an arc-shaped groove.

[0015] As a preferred technical solution, the frame body includes a push rod, a front bracket, and a rear bracket that are rotatably connected to each other, as well as a rear support rod and a front support rod; the linkage is rotatably connected to the upper part of the push rod, the linkage is rotatably connected to the upper end of the rear support rod, the lower part of the rear support rod is rotatably connected to the rear bracket, the lower end of the rear support rod is rotatably connected to the rear end of the front support rod, and the front end of the front support rod is rotatably connected to the front bracket.

[0016] As a preferred technical solution, the rotation points between the linkage and the push handle, the push rod, and the rear support rod are three or two.

[0017] As a preferred technical solution, the locking mechanism is disposed between the push rod, the push handle body and the linkage.

[0018] As a preferred technical solution, the locking mechanism is a multi-position locking mechanism, which can lock the relative position of the push handle body and the frame body at least in the unfolded state and the first folded state.

[0019] Compared with the prior art, this application has the following advantages:

[0020] 1. This application enables the stroller to have two folding modes, allowing users to flexibly choose and quickly switch between them according to real-time space and functional needs.

[0021] 2. After completing the standard first fold, this application provides an additional degree of folding freedom, allowing users to perform a second fold and rotate the handle body independently. This design cleverly avoids the movement interference point of the original stroller during the first fold, allowing the handle to break through the original limit position and retract more completely, thereby significantly reducing the overall thickness and volume of the stroller after folding, and greatly improving the product's portability and storage efficiency.

[0022] 3. Existing folding processes involve a continuous, single-degree-of-freedom motion. This application creatively decomposes the folding process into two relatively independent stages by designing the push handle as two relatively rotatable parts: the push handle body and the linkage, supplemented by specific motion coupling structures (such as limiting grooves and limiting blocks). This "motion decomposition" mechanism cleverly avoids the dead point or interference problem at the end position in traditional strollers, which is the fundamental reason for achieving secondary folding and reflects a high degree of mechanical design ingenuity.

[0023] 4. The improvements in this application are concentrated on the connection points between the push handle, push rod, and rear support rod, without requiring radical modifications to the frame body and main linkage mechanisms. This means that the solution can be easily integrated into various existing children's bicycle frames, with relatively low modification costs, strong versatility, and is conducive to technology promotion and application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. The drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0026] Figure 1 This is a three-dimensional structural diagram of the present application in its unfolded state;

[0027] Figure 2 This is a side view of the structure of this application in its unfolded state;

[0028] Figure 3 This is an exploded view of the push handle body and the linkage in this application;

[0029] Figure 4 This is a schematic diagram of the push handle body and linkage in the deployed state in this application.

[0030] Figure 5 for Figure 4 A schematic diagram of the structure when the main body of the pusher is rotated to a predetermined intermediate angle;

[0031] Figure 6This is a schematic diagram of the side structure of this application when it is in the first folded state;

[0032] Figure 7 This is a schematic diagram of the side structure of this application when it is in the second folded state.

[0033] The components include: 1. Frame body; 101. Push rod; 102. Front support; 103. Rear support; 104. Front wheel assembly; 105. Rear wheel assembly; 106. Rear strut; 107. Front strut.

[0034] 2. Push handle; 201. Push handle body; 2011. Limiting block; 202. Linking component; 2021. Limiting groove. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the described embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It is understood that, without conflict, some technical means of the various embodiments described herein can be substituted for or combined with each other.

[0036] In the description of this application and the claims, the terms "first," "second," etc., are used only to distinguish the described objects and have no sequential or technical meaning. Therefore, objects specified with "first," "second," etc., may explicitly or implicitly include one or more of those objects. Furthermore, the words "one" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, while "multiple" indicates not less than two.

[0037] In the description of this application and the claims, the terms "connection," "installation," "fixation," and "reception," unless otherwise specified, should be interpreted broadly. For example, "connection" can mean a separate connection or an integral connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean a non-detachable connection or a detachable connection. As another example, "reception" does not necessarily mean complete containment; this concept also includes the containment of a portion that protrudes externally. Those skilled in the art can understand the specific meaning of the aforementioned terms in this application based on the specific circumstances.

[0038] In the description of this application and the claims, if terms such as "above," "below," or "horizontal" indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, they are only for the purpose of clearly and simply describing this application, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation. These directional terms are relative concepts used for relative description and clarification, and may change accordingly depending on the orientation of the components in the drawings. For example, if the device in the drawings is flipped, an element described as "below" other elements will be positioned "above" other elements.

[0039] In the description of this application specification and claims, the term "if" is generally interchangeable with "when," "at," "in response to determination," or "in response to detection," depending on the context.

[0040] In the description of this application and the claims, if there is a "direction" of motion, including motion with a directional component, the term "in direction" is not necessarily understood as motion only in that one direction. Those skilled in the art can understand the specific meaning of the aforementioned terms in this application according to the specific circumstances.

[0041] like Figures 1 to 7 As shown, a foldable stroller includes a frame body 1 having an unfolded state and a folded state, a push handle 2, and a locking mechanism for locking the push handle 2 to the frame body 1.

[0042] In this embodiment, the frame body 1 includes a push rod 101, a front bracket 102, and a rear bracket 103, which are interconnected by rotation. The specific rotational connection method is not limited; in the figure, as a preferred connection method, the push rod 101 and the front bracket 102 are respectively rotatably connected to the rear bracket 103. The specific connection method can be flexibly selected according to actual needs. The front bracket 102 has a front wheel assembly 104 mounted at its bottom, and the rear bracket 103 has a rear wheel assembly 105 mounted at its bottom.

[0043] In this embodiment, the frame body 1 further includes a rear support rod 106 and a front support rod 107. The lower part of the rear support rod 106 is rotatably connected to the rear bracket 103, and the lower end of the rear support rod 106 extends forward from the rear bracket 103 and is rotatably connected to the rear end of the front support rod 107. The front end of the front support rod 107 is rotatably connected to the front bracket 102. These rotatable connections together constitute a linkage motion system that enables the vehicle to be folded and unfolded.

[0044] In this embodiment, the push handle 2 includes a push handle body 201 and a connecting member 202. The lower part of the push handle body 201 is rotatably connected to the upper part of the connecting member 202, the connecting member 202 is rotatably connected to the upper part of the push rod 101, and the lower end of the connecting member 202 is rotatably connected to the upper end of the rear support rod 106. The connecting member has three or two rotation points with respect to the push handle, the push rod, and the rear support rod. In this embodiment, preferably, the upper part of the connecting member 202, the lower part of the push handle body 201, and the upper part of the push rod 101 are rotatably connected at one rotation point, and the lower end of the connecting member 202 is rotatably connected to the upper end of the rear support rod 106 at another rotation point.

[0045] The stroller has an unfolded state, a first folded state, and a second folded state;

[0046] In the unfolded state, the frame body 1 is in the unfolded state, the push handle body 201 and the linkage 202 are in the unfolded position and are locked relative to the frame body 1 by the locking mechanism;

[0047] In the first folded state, the frame body and the linkage are in a folded state, and a first included angle is formed between the push handle body and the linkage; preferably, the first included angle is consistent with the included angle between the push handle body and the linkage in the unfolded position.

[0048] In the second folded state, the frame body and the linkage are folded, and a second angle different from the first angle is formed between the push handle body and the linkage. In this embodiment, preferably, the second angle is smaller than the first angle, which can achieve a more compact folding shape.

[0049] In this embodiment, a motion coupling structure is provided between the linkage 202 and the push handle body 201, which can constrain the relative motion trajectory between the linkage 202 and the push handle body 201. In this preferred embodiment, the structure is specifically manifested as follows: an arc-shaped limiting groove 2021 is formed on the linkage 202, and a limiting block 2011 corresponding to the limiting groove 2021 is fixedly provided on the push handle body 201. The limiting block 2011 extends into the limiting groove 2021 and can move along the extension direction of the limiting groove 2021. It can be understood that the same technical effect can be achieved by interchanged setting positions of the limiting groove and the limiting block (i.e., the limiting groove is set on the push handle body 201, and the limiting block is set on the linkage 202).

[0050] In this embodiment, the locking mechanism is disposed between the push rod 101, the push handle body 201 and the linkage 202.

[0051] In the stroller structure shown in this embodiment, preferably, the locking mechanism has a first locking state and a second locking state: In the first locking state (the stroller is in the unfolded state), the locking mechanism simultaneously engages with the push rod 101, the push handle body 201, and the linkage 202 to prevent relative rotation between the push rod 101, the push handle body 201, and the linkage 202, thereby stabilizing the push handle 2 in the unfolded state; In the second locking state, the locking mechanism disengages from the linkage 202, but simultaneously engages with the push handle body 201 and the push rod 101 to prevent relative rotation between the push handle body 201 and the push rod 101. The locking mechanism described in this application can adopt any conventional structure known in the art, such as, but not limited to, button-type, lever-type, or slider-type locking mechanisms. Its unlocking element is preferably arranged in the upper middle position of the push handle body 201. Any existing locking mechanism that can achieve the locking and unlocking functions is applicable to this application. The improvement in this application lies not in the specific structure of the locking mechanism itself, but in the connection between the push handle and the frame and the resulting secondary folding method. Therefore, the specific structure of the locking mechanism will not be described in detail or limited.

[0052] The folding motion principle of this application is as follows:

[0053] Initial folding stage (from unfolded state to intermediate transition state): When folding the stroller begins, the locking mechanism is released, and the handle body 201 rotates relative to the push rod 101. At this time, due to the constraints of the frame structure, the movement of the linkage 202 lags behind that of the handle body 201, causing the limiting block 2011 to move from back to front within the limiting groove 2021. When the handle body 201 rotates to a predetermined intermediate angle, the locking mechanism can be triggered to lock, temporarily fixing the relative position of the handle body 201 and the push rod 101. At this time, the stroller is not yet fully folded, and the limiting block 2011 is located at the front end of the limiting groove 2021.

[0054] First folding stage (reaching the first folded state): After the intermediate locking state, a folding force continues to be applied to the frame, and the entire frame body 1 begins to fold further. This process drives the linkage 202 to produce a reverse movement relative to the push handle body 201, manifested as the limiting block 2011 moving from front to back within the limiting groove 2021. When the frame is fully folded to the first folded state, the limiting block 2011 moves to the rear end of the limiting groove 2021. At this time, the upper part of the push handle body 201 tilts outward, and the state of the push handle body 201 is the final folded state of a traditional children's stroller. During the above first folding stage, the push handle body 201 and the push rod 101 remain in a relatively locked state.

[0055] Secondary folding stage (from the first folded state to the second folded state): Based on the first folded state, the locking mechanism is released again. At this time, the push handle body 201 can rotate freely around its rotation point with the linkage 202. Since the frame body 1 has been folded and fixed, the position of the linkage 202 is constrained, and the push handle body 201 can be pushed inward, causing the limiting block 2011 to move forward again within the limiting groove 2021, thereby driving the push handle body 201 to rotate inward by an angle relative to the folded frame body 1 and the linkage 202, achieving the second folded state and significantly reducing the folding thickness.

[0056] In this embodiment, the locking mechanism can be simplified to lock the push rod, push handle, and linkage only when the stroller is fully unfolded, ensuring stability during use. The intermediate locking required during folding can be achieved by a separate auxiliary mechanism. Given the variety of ways the auxiliary mechanism achieves these functions, they will not be elaborated upon here.

[0057] This application decomposes the push handle 1 into two parts: the push handle body 201 and the linkage 202. After completing a normal first fold, it provides an additional degree of folding freedom, allowing the user to perform a second folding operation by independently rotating the push handle body inward. This design cleverly avoids the movement interference point of the original stroller during the first fold, allowing the push handle to break through the original limit position and retract more thoroughly, thereby significantly reducing the overall thickness and volume of the stroller after folding, and greatly improving the product's portability and storage efficiency.

[0058] This application creatively decomposes the folding process into two relatively independent stages by designing the push handle 1 as two relatively rotatable parts: the push handle body 201 and the linkage 202, supplemented by a specific motion coupling structure (such as the limiting groove 2021 and the limiting block 2011). This "motion decomposition" mechanism cleverly avoids the dead point or interference problem at the end position of traditional strollers, which is the fundamental reason for achieving secondary folding and reflects a high degree of mechanical design ingenuity.

[0059] The improvements in this application focus on the connection points between the push handle 1, the push rod 101, and the rear support rod 106, without requiring radical modifications to the frame body and main linkage mechanisms. This means that the solution can be easily integrated into various existing children's vehicle frames, with relatively low modification costs, strong versatility, and is conducive to technology promotion and application.

[0060] This application enables the stroller to have two folding modes, allowing users to flexibly choose and quickly switch between them based on real-time space and functional needs.

[0061] The above embodiments illustrate a sequential folding path from the unfolded state through the first folded state to the second folded state. However, in actual operation, by changing the path of the motion coupling structure, it is also possible to directly switch from the unfolded state to the second folded state, and then switch from the second folded state to the first folded state as needed.

[0062] As a preferred embodiment of this application, in the description of this specification, the reference to terms such as "preferred," "optional," etc., means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above embodiments are only used to illustrate the detailed solutions of this application. This application is not limited to the above detailed solutions, that is, it does not mean that this application must rely on the above detailed solutions to be implemented. Those skilled in the art should understand that any improvements to this application, equivalent substitutions of the raw materials of the product of this application, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of this application.

Claims

1. A foldable stroller, characterized by: It includes a frame body with an unfolded state and a folded state, a push handle, and a locking mechanism for locking the push handle to the frame body; The push handle includes a push handle body and a linkage, the push handle body is rotatably connected to the linkage, and the linkage is rotatably connected to the frame body; The stroller has an unfolded state, a first folded state, and a second folded state; In the unfolded state, the frame body is unfolded, the push handle body and the linkage are in the unfolded position and are locked to the frame body by a locking mechanism; In the first folded state, the frame body and the linkage are folded, and a first angle is formed between the push handle body and the linkage. In the second folded state, the frame body and the linkage are folded, and a second angle different from the first angle is formed between the push handle body and the linkage.

2. A stroller according to claim 1, wherein: The first included angle is consistent with the included angle between the push handle body and the linkage when they are in the unfolded position.

3. The stroller of claim 1, wherein: A motion coupling structure is provided between the linkage and the push handle body, which can constrain the relative motion trajectory between the linkage and the push handle body.

4. A foldable stroller according to claim 3, wherein: The motion coupling structure includes a matching limiting groove and a limiting block; the limiting groove is disposed on the linkage or the push handle body, the limiting block is disposed on the push handle body or the linkage, and the limiting block is movably accommodated within the limiting groove.

5. A foldable stroller according to claim 4, wherein: When the frame body is folded from the unfolded state to the first folded state, the limiting block is driven to move from the second limiting end to the first limiting end in the limiting groove along the first direction, and then moves to the second limiting end along the second direction opposite to the first direction; when switching from the first folded state to the second folded state, the limiting block can move from the second limiting end to the first limiting end again along the first direction.

6. A stroller according to claim 4, wherein: The limiting groove is an arc-shaped groove.

7. The stroller of claim 1, wherein: The main body of the frame includes a push rod, a front bracket, and a rear bracket that are rotatably connected to each other, as well as a rear support rod and a front support rod; the linkage is rotatably connected to the upper part of the push rod, the linkage is rotatably connected to the upper end of the rear support rod, the lower part of the rear support rod is rotatably connected to the rear bracket, the lower end of the rear support rod is rotatably connected to the rear end of the front support rod, and the front end of the front support rod is rotatably connected to the front bracket.

8. A stroller as claimed in claim 7, wherein: The linkage has three or two rotation points with respect to the push handle, the push rod, and the rear support rod.

9. A stroller as claimed in claim 7, wherein: The locking mechanism is located between the push rod, the push handle body, and the linkage.

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