A folding child's pushchair

Abstract

The application discloses a folding child stroller, which comprises a frame, a push handle assembly, a front support rod, a rear support rod, a seat frame and a connecting rod. The lower part of the push handle assembly is rotationally connected with the upper part of the push rod assembly. The front part of the front support rod is rotationally connected with the front support. The upper part of the rear support rod is rotationally connected with the push handle assembly. The lower part of the rear support rod is respectively rotationally connected with the rear part of the front support rod and the rear support. The seat frame is rotationally connected with the front support. The upper part of the connecting rod is rotationally connected with the seat frame. The lower part of the connecting rod is rotationally connected with the front support rod or the rear support rod. The rotationally connected point is located between the rotationally connected point of the front support rod and the front support and the rotationally connected point of the rear support rod and the rear support. The application realizes single-action and one-step folding. The folding process is smooth and free of interference. The seat frame can be closely attached to the main frame after folding. The folding volume is extremely small. The stroller is convenient to carry and store.

Description

Technical Field

[0001] This application relates to the field of stroller technology, and more particularly to a folding stroller. Background Technology

[0002] In existing foldable stroller designs, the folding mechanism of the main frame is relatively mature, capable of achieving basic folding functionality. However, a prevalent and long-standing technical drawback lies in the lack of an effective active folding mechanism for the seat frame during the folding process. In most existing products, the seat frame is typically only simply hinged to the front support, remaining passive during folding. When the main frame is folded, the seat frame often hangs haphazardly, failing to form a compact unit with the folded frame and instead becoming a protruding element that increases the overall volume after folding. This asynchrony and lack of coordination between the seat frame and the main frame during folding directly results in the insufficient compactness of existing foldable strollers when folded. Summary of the Invention

[0003] The purpose of this application is to provide a folding stroller that achieves single-action, one-step folding through an optimized multi-link linkage design. The operation is extremely simple, the folding process is smooth and interference-free, and the seat frame can be closely attached to the main frame after folding, resulting in a very small folded volume, making it easy to carry and store.

[0004] The technical solution of this application is: a folding stroller, including a frame having an unfolded state and a folded state, and a locking mechanism for locking the frame in the unfolded state. The frame includes a front support, a rear support, and a push rod assembly, a push handle assembly, a front support rod, a rear support rod, a seat frame, and a connecting rod, all rotatably connected.

[0005] The lower part of the push handle assembly is rotatably connected to the upper part of the push rod assembly;

[0006] The front part of the front support rod is rotatably connected to the front bracket;

[0007] The upper part of the rear support rod is rotatably connected to the push handle assembly, and the lower part of the rear support rod is rotatably connected to the rear part of the front support rod and the rear bracket, respectively.

[0008] The seat frame is rotatably connected to the front support;

[0009] The upper part of the connecting rod is rotatably connected to the seat frame, and the lower part of the connecting rod is rotatably connected to the front support rod or the rear support rod, and the rotatable connection point is located within the range between the rotatable connection point between the front support rod and the front bracket and the rotatable connection point between the rear support rod and the rear bracket.

[0010] As a preferred technical solution, during the folding process, the push handle assembly is driven to rotate forward and downward, and simultaneously drives the front support rod through the rear support rod, so that the push rod assembly, the front bracket and the rear bracket retract into each other; at the same time, the movement of the front support rod or the rear support rod is transmitted to the seat frame through the connecting rod, driving the seat frame to flip and retract into the front bracket.

[0011] As a preferred technical solution, the upper part of the front bracket, the upper part of the rear bracket, and the lower part of the push rod assembly can be connected by coaxial rotation or by off-axis rotation.

[0012] Coaxial connection scheme: refers to the front bracket, rear bracket and push rod assembly being connected by the same axis.

[0013] Off-axis connection schemes refer to connections where the three components are connected via two rotating shafts. For example, the lower part of the pushrod assembly can be connected to the upper part of the front bracket via one shaft, and the upper part of the front bracket can be connected to the upper part of the rear bracket via another shaft; alternatively, the lower part of the pushrod assembly can be connected to the upper part of the rear bracket via one shaft, and the upper part of the rear bracket can be connected to the upper part of the front bracket via another shaft; or the lower part of the pushrod assembly can be connected to both the front and rear brackets via two separate shafts. While these off-axis connection schemes differ slightly in their specific structures, they all achieve the necessary relative rotation between the three components and ultimately complete the folding and unfolding of the frame, constituting an equivalent transformation of this application.

[0014] As a preferred technical solution, the push handle assembly has a downwardly extending extension, and the upper end of the rear support rod is rotatably connected to its extension; when the frame is in the unfolded state, the rotation point of the push handle assembly and the rear support rod is located below the rotation point of the push handle assembly and the push rod assembly.

[0015] As a preferred technical solution, the rotation point of the rear support rod and the front support rod is located in front of the rotation point of the rear support rod and the rear bracket.

[0016] As a preferred technical solution, the seat frame is rotatably connected to the front support via its rear end, and the rear end of the seat frame has a downwardly bent extension section, with the upper part of the connecting rod rotatably connected to the lower part of its extension end.

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

[0018] As a preferred technical solution, the frame further includes a front wheel assembly and a rear wheel assembly; the front wheel assembly is mounted on the bottom of the front support; and the rear wheel assembly is mounted on the bottom of the rear support.

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

[0020] 1. This application utilizes a main folding linkage mechanism comprised of a push handle assembly, a push rod assembly, a rear support rod, and a front support rod. This mechanism works in conjunction with a secondary linkage mechanism consisting of a seat frame, connecting rods, and either a front or rear support rod, achieving truly efficient single-action, one-step folding. The user only needs to apply downward pressure to the push handle assembly to simultaneously drive the main frame to fold and the seat frame to flip. The operation is extremely simplified, and the linkage process is smooth without any motion interference.

[0021] 2. The linkage design in this application allows the folded seat frame to fit snugly against the folded front support. This feature greatly reduces the overall volume in the folded state, resulting in a compact folded form that greatly facilitates carrying and storage. Attached Figure Description

[0022] 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.

[0023] 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.

[0024] Figure 1 This is a three-dimensional structural diagram of the present application in its unfolded state;

[0025] Figure 2 This is a side view of the structure of this application in its unfolded state;

[0026] Figure 3 This is a schematic diagram of the assembly structure of this application;

[0027] Figure 4 This is a three-dimensional structural diagram of the present application during the folding process;

[0028] Figure 5 This is a schematic diagram of the side structure of this application during the folding process;

[0029] Figure 6 This is a three-dimensional structural diagram of the present application when it is in a folded state;

[0030] Figure 7 This is a schematic diagram of the side structure of this application when it is in a folded state.

[0031] The components are: 1. Front bracket; 2. Rear bracket; 3. Push rod assembly; 4. Push handle assembly; 401. Extension; 5. Front strut; 6. Rear strut; 601. Main body section; 602. Auxiliary section; 7. Seat frame; 8. Linkage; 701. Extension section; 9. Front wheel assembly; 10. Rear wheel assembly. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] like Figures 1 to 7 As shown, a folding stroller includes a frame having an unfolded state and a folded state, and a locking mechanism for locking the frame in the unfolded state. The frame includes a front support 1, a rear support 2, a push rod assembly 3, a push handle assembly 4, a front support rod 5, a rear support rod 6, a seat frame 7, and a connecting rod 8, all rotatably connected.

[0039] The lower part of the push handle assembly 4 is rotatably connected to the upper part of the push rod assembly 3;

[0040] The front part of the front support rod 5 is rotatably connected to the front bracket 1;

[0041] The upper part of the rear support rod 6 is rotatably connected to the push handle assembly 4, and the lower part of the rear support rod 6 is rotatably connected to the rear part of the front support rod 5 and the rear bracket 2 respectively.

[0042] The seat frame 7 is rotatably connected to the front support 1;

[0043] The upper part of the connecting rod 8 is rotatably connected to the seat frame 7, and the lower part of the connecting rod 8 is rotatably connected to the front support rod 5 or the rear support rod 6. The rotatable connection point is located within the range between the rotatable connection point of the front support rod 5 and the front bracket 1 and the rotatable connection point of the rear support rod 6 and the rear bracket 2.

[0044] In this embodiment, the lower part of the connecting rod 8 is preferably rotatably connected to the front support rod 5 within the range between the rotatable connection point of the front support rod 5 and the front bracket 1 and the rotatable connection point of the rear support rod 6 and the rear bracket 2.

[0045] In this embodiment, the upper part of the front bracket 1, the upper part of the rear bracket 2, and the lower part of the push rod assembly 3 can be connected by coaxial rotation or off-axis rotation.

[0046] Coaxial connection scheme: This refers to the front bracket 1, rear bracket 2, and push rod assembly 3 being connected by the same shaft. This scheme has the most compact structure and the fewest parts, and is the preferred method in this embodiment.

[0047] Off-axis connection scheme: This refers to the connection of the three components via two rotating shafts. For example, the lower part of the push rod assembly 3 can be connected to the upper part of the front bracket 1 via one shaft, and the upper part of the front bracket 1 can be connected to the upper part of the rear bracket 2 via another shaft; or, the lower part of the push rod assembly 3 can be connected to the upper part of the rear bracket 2 via one shaft, and the upper part of the rear bracket 2 can be connected to the upper part of the front bracket 1 via another shaft; or, the lower part of the push rod assembly 3 can be connected to both the front bracket 1 and the rear bracket 2 via two independent shafts. Although these off-axis connection schemes differ slightly in their specific structures, they all achieve the necessary relative rotation between the three components and ultimately complete the folding and unfolding of the frame, which constitutes an equivalent transformation of this application.

[0048] In the accompanying drawings of this embodiment, for the sake of simplicity and efficiency, it is preferred to show the three components connected coaxially.

[0049] In this embodiment, the push handle assembly 4 preferably has a downwardly extending extension 401, and the upper end of the rear support rod 6 is rotatably connected to its extension 401; when the frame is in the unfolded state, the rotation point of the push handle assembly 4 and the rear support rod 6 is located below the rotation point of the push handle assembly 4 and the push rod assembly 3.

[0050] In this embodiment, the rear support rod 6 preferably has a longitudinally inclined main body section 601 and an auxiliary section 602 that bends forward from the bottom of the main body section 601. The rear bracket 2 is rotatably connected to the lower part of its main body section 601, and the rear part of the front support rod 5 is rotatably connected to the front end of its auxiliary section 602. That is, the rotation point of the rear support rod 6 and the front support rod 5 is located in front of the rotation point of the rear support rod 6 and the rear bracket 2.

[0051] In this embodiment, the seat frame 7 is rotatably connected to the front support 1 via its rear end, and the rear end of the seat frame 7 has a downwardly bent extension section 701, and the upper part of the connecting rod 8 is rotatably connected to the lower part of its extension end 701.

[0052] In this embodiment, the lower part of the connecting rod 8 is preferably rotatably connected to the middle or rear part of the front support rod 5.

[0053] In this embodiment, the locking mechanism is disposed between the push handle assembly 4 and the push rod assembly 3, and is used to lock the relative rotation of the push handle assembly 4 and the push rod assembly 3 in the unfolded state. This application does not limit the specific type of the locking mechanism; those skilled in the art can select any suitable locking mechanism from the prior art to implement this locking function according to actual needs. This design sets the locking point at the initial drive position of the folding action, effectively locking the entire linkage system and ensuring the stability of the frame in the unfolded state.

[0054] In this embodiment, the frame further includes a front wheel assembly 9 and a rear wheel assembly 10; the front wheel assembly 9 is mounted on the bottom of the front support 1; and the rear wheel assembly 10 is mounted on the bottom of the rear support 2. The front wheel assembly 9 and the rear wheel assembly 10 can employ conventional wheel bodies and mounting structures in the art. This application does not limit the specific type, size, or quantity of the front wheel assembly 9 and the rear wheel assembly 10, including but not limited to swivel wheels, fixed wheels, single wheels, dual wheels, with brakes, or without brakes.

[0055] The working principle of this application

[0056] The frame folding is initiated by releasing the locking mechanism and actuating the push handle assembly 4. The core linkage process is as follows:

[0057] 1. Main frame retraction:

[0058] The push handle assembly 4 is driven to rotate forward and downward, and simultaneously drives the front support rod 5 through the rear support rod 6, so that the push rod assembly 3, the front bracket 1 and the rear bracket 2 can be retracted to complete the folding of the main frame.

[0059] 2. The seat frame 7 flips and folds in sync:

[0060] The movement of the front support rod 5 or the rear support rod 6 synchronously drives the connecting rod 8, which is rotatably connected to it. Since the upper part of the connecting rod 8 is rotatably connected to the lower part of the downwardly bent extension 701 at the rear end of the seat frame 7, the movement of the connecting rod 8 will apply a precise torque, forcing the entire seat frame 7 to achieve a controllable forward and downward flipping movement around its connection point with the front support 2, and finally closely adhering to the folded front support, thereby achieving a highly compact folding of the entire frame.

[0061] This application utilizes a main folding linkage mechanism comprised of a push handle assembly, a push rod assembly, a rear support rod, and a front support rod. This mechanism works in conjunction with a secondary linkage mechanism consisting of a seat frame, connecting rods, and either a front or rear support rod, achieving truly efficient single-action, one-step folding. Users only need to apply downward pressure to the push handle assembly to simultaneously drive the main frame to fold and the seat frame to flip. The operation is extremely simplified, and the linkage process is smooth with no motion interference.

[0062] The linkage design in this application allows the folded seat frame to fit snugly against the folded front support. This feature greatly reduces the overall volume in the folded state, resulting in a compact folded form that greatly facilitates carrying and storage.

[0063] 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.

[0064] 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 folding stroller, comprising a frame having an unfolded state and a folded state, and a locking mechanism for locking the frame in the unfolded state, characterized in that, The frame includes a rotatably connected front support, rear support, and pushrod assembly, a push handle assembly, a front support rod, a rear support rod, a seat frame, and connecting rods; wherein: The lower part of the push handle assembly is rotatably connected to the upper part of the push rod assembly; The front part of the front support rod is rotatably connected to the front bracket; The upper part of the rear support rod is rotatably connected to the push handle assembly, and the lower part of the rear support rod is rotatably connected to the rear part of the front support rod and the rear bracket, respectively. The seat frame is rotatably connected to the front support; The upper part of the connecting rod is rotatably connected to the seat frame, and the lower part of the connecting rod is rotatably connected to the front support rod or the rear support rod, and the rotatable connection point is located within the range between the rotatable connection point between the front support rod and the front bracket and the rotatable connection point between the rear support rod and the rear bracket.

2. A folding stroller according to claim 1, characterized in that, During the folding process, the push handle assembly is driven to rotate forward and downward, and simultaneously drives the front support rod through the rear support rod, causing the push rod assembly, the front bracket, and the rear bracket to retract into each other; at the same time, the movement of the front support rod or the rear support rod is transmitted to the seat frame through the connecting rod, driving the seat frame to flip and retract into the front bracket.

3. A folding stroller according to claim 1, characterized in that, The upper part of the front bracket, the upper part of the rear bracket, and the lower part of the push rod assembly are coaxially or rotatably connected.

4. A folding stroller according to claim 1, characterized in that, The push handle assembly has a downwardly extending extension, and the upper end of the rear support rod is rotatably connected to its extension; when the frame is in the unfolded state, the rotation point of the push handle assembly and the rear support rod is located below the rotation point of the push handle assembly and the push rod assembly.

5. A folding stroller according to claim 1, characterized in that, The rotation point of the rear support rod and the front support rod is located in front of the rotation point of the rear support rod and the rear bracket.

6. A folding stroller according to claim 1, characterized in that, The seat frame is rotatably connected to the front support via its rear end, and the rear end of the seat frame has a downwardly bent extension section, with the upper part of the connecting rod rotatably connected to the lower part of its extension end.

7. A folding stroller according to claim 1, characterized in that, The locking mechanism is located between the push handle assembly and the push rod assembly.

8. A folding stroller according to claim 1, characterized in that, The frame also includes a front wheel assembly and a rear wheel assembly; the front wheel assembly is mounted on the bottom of the front support; the rear wheel assembly is mounted on the bottom of the rear support.

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