A foldable children's stroller
By designing a linkage mechanism in the stroller that links the front and rear wheel assemblies with the frame, the problem of complex wheel operation in the prior art is solved, achieving synchronous wheel operation, simplifying the folding process and improving convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN VIGORKIDS CHILD PROD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-05-26
Smart Images
Figure CN224277258U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of stroller technology, and more particularly to a foldable stroller. Background Technology
[0002] Folding strollers are a very convenient means of transportation for children. Their ease of folding and compact size after folding make them easy to store, meeting consumer demand. Existing folding strollers generally include a foldable frame, wheels mounted beneath the frame, a locking device to keep the frame in the open position, and a seat for the infant. To further reduce the folded size, some folding strollers have wheels that fold inwards, making the stroller flatter when folded. However, in these existing strollers with foldable wheels, both folding and unfolding the wheels require separate steps, meaning the entire stroller requires at least two steps to fold and unfold, which is not simple or quick. Summary of the Invention
[0003] The purpose of this application is to provide a foldable stroller, wherein the front wheel assembly and the rear wheel assembly can be opened and folded together with the frame, making the operation simpler and faster, and the structure more compact, smaller and flatter after folding, making it easier to store.
[0004] The technical solution of this application is: a foldable child stroller, including a frame having an unfolded state and a folded state, a locking mechanism for locking the frame in the unfolded state, and a front wheel assembly and a rear wheel assembly, wherein the frame includes...
[0005] Upper bracket;
[0006] The front bracket, the upper part of which is rotatably connected to the lower part of the upper bracket;
[0007] The rear bracket has its upper part slidably connected to the front bracket via a first sliding member that is rotatably connected.
[0008] The first connecting rod has its upper part rotatably connected to the upper bracket and its lower part rotatably connected to the first sliding member and / or the rear bracket;
[0009] The base support is rotatably connected to the front support at its front end and rotatably connected to the rear support at its rear end.
[0010] A front wheel linkage mechanism is disposed between the base bracket and the front wheel assembly and the front bracket;
[0011] A rear wheel linkage mechanism is disposed between the bottom bracket and the rear wheel assembly and the rear bracket;
[0012] The front wheel assembly is rotatably connected to the bottom of the front bracket and / or the front of the bottom bracket;
[0013] The rear wheel assembly is rotatably connected to the bottom of the rear bracket and / or the rear of the bottom bracket;
[0014] When the frame is opened or folded, the front wheel assembly and the rear wheel assembly open or fold inward together with the frame under the action of the front wheel linkage mechanism and the rear wheel linkage mechanism.
[0015] As a preferred technical solution, the front wheel linkage mechanism includes a second sliding member slidably disposed at the front of the bottom bracket, a third connecting rod rotatably connected between the second sliding member and the front bracket, and a fourth connecting rod rotatably connected between the second sliding member and the front wheel assembly.
[0016] As a preferred technical solution, the rear wheel linkage mechanism includes a third sliding member slidably disposed at the rear of the bottom bracket, a sixth link rotatably connected between the third sliding member and the rear bracket, and a fifth link rotatably connected between the third sliding member and the rear wheel assembly.
[0017] As a preferred technical solution, the frame further includes an upper push handle that can be retracted relative to the upper support. Preferably, the upper push handle is slidably engaged with the upper support and can extend or retract relative to it.
[0018] As a preferred technical solution, the locking mechanism includes a first locking mechanism disposed between the push handle and the upper bracket, and a second locking mechanism disposed at the rotatable connection between the upper bracket and the front bracket. Preferably, the first locking mechanism and the second locking mechanism are linked; when the first locking mechanism is released and the push handle is retracted relative to the upper bracket, the second locking mechanism is automatically released.
[0019] Compared with the prior art, this application has the following advantages:
[0020] 1. When the frame is opened and folded, the front wheel linkage mechanism and the rear wheel linkage mechanism enable the front wheel assembly and the rear wheel assembly to open and fold together with the frame. There is no need for a separate operation step to open or fold the wheels. The operation is simpler and faster, which is suitable for parents to quickly fold the bike when holding their child, thus improving convenience.
[0021] 2. When folded, the front wheel assembly and rear wheel assembly of this application retract inwards along with the frame, resulting in a smaller and flatter size that is easier to store.
[0022] 3. This application achieves automatic wheel folding (front wheel assembly and rear wheel assembly) through mechanical linkage design, making the folding process smoother and avoiding mechanical interference during step-by-step operation. Attached Figure Description
[0023] 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.
[0024] 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.
[0025] Figure 1 This is a three-dimensional structural diagram of the present application in its unfolded state;
[0026] Figure 2 This is a side view of the structure of this application in its unfolded state;
[0027] Figure 3 This is a frontal structural diagram of the present application in its unfolded state;
[0028] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure of AA;
[0029] Figure 5 This is a three-dimensional structural diagram of the present application during the folding process;
[0030] Figure 6 This is a schematic diagram of the side structure of this application during the folding process;
[0031] Figure 7 This is a three-dimensional structural diagram of the present application when it is in a folded state;
[0032] Figure 8 This is a schematic diagram of the side structure of this application when it is in a folded state.
[0033] in:
[0034] 100 frame;
[0035] 101 with a support bracket;
[0036] 102 front bracket;
[0037] 103 rear bracket; 1031 second crossbar;
[0038] 104 First sliding member;
[0039] 105 First Linkage;
[0040] 106 base support;
[0041] 108 Front wheel linkage mechanism; 1081 Second sliding member; 1082 Third link; 1083 Fourth link;
[0042] 109 Rear wheel linkage mechanism; 1091 Third sliding member; 1092 Sixth link; 1093 Fifth link;
[0043] 110 push handle;
[0044] 111 Handrail assembly;
[0045] 112 canopy rod assembly;
[0046] 200 front wheel assembly;
[0047] 300 rear wheel assembly. Detailed Implementation
[0048] 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.
[0049] 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.
[0050] 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.
[0051] 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.
[0052] 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.
[0053] 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.
[0054] like Figures 1 to 8 As shown, a foldable stroller includes a frame 100 having an unfolded state and a folded state, a locking mechanism for locking the frame in the unfolded state, and a front wheel assembly 200 and a rear wheel assembly 300. The frame 100 includes...
[0055] Upper bracket 101;
[0056] The push handle 110 is located above the upper bracket 101 and can be retracted relative to the upper bracket 101;
[0057] The upper part of the front bracket 102 is rotatably connected to the lower part of the upper bracket 101;
[0058] The upper part of the rear bracket 103 is slidably connected to the front bracket 102 via a first sliding member 104 that is rotatably connected.
[0059] The first connecting rod 105 is rotatably connected to the upper bracket 101 at its upper part and rotatably connected to the first sliding member 104 and / or the rear bracket 103 at its lower part.
[0060] The bottom support 106 is rotatably connected to the front support 102 at its front and rotatably connected to the lower part of the rear support 103 at its rear.
[0061] The front wheel linkage mechanism 108 is disposed between the bottom bracket 106 and the front wheel assembly 200 and the front bracket 102;
[0062] The rear wheel linkage mechanism 109 is disposed between the bottom bracket 106 and the rear wheel assembly 300 and the rear bracket 103;
[0063] The front wheel assembly 200 is rotatably connected to the bottom of the front bracket 102 and / or the front of the bottom bracket 106;
[0064] The rear wheel assembly 300 is rotatably connected to the bottom of the rear bracket 103 and / or the rear of the bottom bracket 106;
[0065] When the frame 100 is opened or folded, the front wheel assembly 200, under the action of the front wheel linkage mechanism 108, and the rear wheel assembly 300, under the action of the rear wheel linkage mechanism 109, open or fold inward together with the frame 100.
[0066] In this embodiment, the lower end of the front bracket 102, the upper part of the front wheel assembly 200, and the front part of the bottom bracket 106 are preferably coaxially connected, i.e., at the same rotation point. The rear part of the bottom bracket 106, the upper part of the rear wheel assembly 300, and the lower part of the rear bracket 103 are preferably coaxially connected, i.e., at the same rotation point. The lower part of the first connecting rod 105, the first sliding member 104, and the rear bracket 103 are preferably coaxially connected, i.e., at the same rotation point.
[0067] In this embodiment, the front wheel linkage mechanism 108 includes a second sliding member 1081 slidably disposed at the front of the base bracket 106, a third connecting rod 1082 rotatably connected between the second sliding member 1081 and the front bracket 102, and a fourth connecting rod 1083 rotatably connected between the second sliding member 1081 and the front wheel assembly 200.
[0068] The upper end of the third link 1082 is rotatably connected to the lower part of the front bracket 102, and the lower end of the third link 1082 is rotatably connected to the second sliding member 1081. The lower end of the fourth link 1083 is rotatably connected to the front wheel assembly 200, and the upper end of the fourth link 1083 is rotatably connected to the second sliding member 1081. When the frame 100 is in the unfolded state, the third link 1082 is arranged with a higher front and lower rear; the fourth link 1083 is arranged with a lower front and higher rear.
[0069] In this embodiment, the rear wheel linkage mechanism 109 includes a third sliding member 1091 slidably disposed at the rear of the bottom bracket 106, a sixth link 1092 rotatably connected between the third sliding member 1091 and the rear bracket 103, and a fifth link 1093 rotatably connected between the third sliding member 1091 and the rear wheel assembly 300.
[0070] The sixth link 1092 can be a basketball hoop rod, with its middle part rotatably connected to the lower part of the rear support 103, and its lower end rotatably connected to the third sliding member 1091. The lower end of the fifth link 1093 is rotatably connected to the rear wheel assembly 300, and its upper end is rotatably connected to the third sliding member 1091. When the frame 100 is in the unfolded state, the fifth link 1093 is arranged with a higher front and lower rear; the sixth link 1092 is arranged with a lower front and higher rear.
[0071] In this embodiment, the first sliding member 104, the second sliding member 1081, and the third sliding member 1091 are all preferably sliding sleeves. Specifically, the first sliding member 104 is slidably sleeved with the side rod of the front support 102 and slides along the extending direction of the front support 102; the second sliding member 1081 and the third sliding member 1091 are slidably sleeved with the side rod of the bottom support 106 and slide along the extending direction of the bottom support 106.
[0072] In this embodiment, a telescopic push handle 110 is preferably used, which slides and extends relative to the upper support 101. This is a preferred embodiment; however, a folding structure can also be used, where the lower part of the push handle 110 is rotatably connected to the upper support 101.
[0073] In this embodiment, the locking mechanism includes a first locking mechanism disposed between the upper push handle 110 and the upper bracket 101, and a second locking mechanism disposed at the rotatable connection between the upper bracket 101 and the front bracket 102. Preferably, the first and second locking mechanisms are linked, meaning that when the first locking mechanism is released and the upper push handle retracts relative to the upper bracket, the second locking mechanism is automatically triggered and released. Furthermore, the unlocking component of the first locking mechanism is preferably located at the upper middle position of the upper push handle. Since the locking mechanisms between two sliding parts, between two rotating parts, and between two locking mechanisms are all conventional structures in this technical field, and their structures vary, they will not be specifically described or limited here.
[0074] In this embodiment, the frame 100 may further include an armrest assembly 113 and a canopy rod assembly 114. Preferably, the armrest assembly 113 and the canopy rod assembly 114 can be mounted on the upper support 101 and can be coaxially connected to the rotatable connection between the first connecting rod 105 and the upper support 101. Since the armrest assembly 113 and the canopy rod assembly 114 are conventional structures in this technical field and have various structures, they will not be specifically described or limited here.
[0075] The working principle of this application is as follows:
[0076] When the frame 100 is unfolded, the upper push handle 110 is in an extended state (extending to its maximum extent beyond the upper bracket 101), and it, along with the front bracket 102 and the upper bracket 101, are arranged at an angle with the front lower than the rear. The rear bracket 103 and the bottom bracket 106 are also arranged at an angle with the front higher than the rear.
[0077] When the frame 100 is folded, the first locking mechanism is first released, causing the push handle 110 to retract relative to the upper bracket 101. At this time, the retracted push handle 110 triggers and automatically releases the second locking mechanism. Then, the push handle 110 is rotated forward and pressed down, causing the upper bracket 101 to rotate forward and fold relative to the front bracket 102. Under the action of the first connecting rod 105 and the first sliding member 104, the rear bracket 103 and the front bracket 102 are folded downward. At the same time, under the linkage of the front wheel linkage mechanism 108 and the rear wheel linkage mechanism 109, the front wheel assembly 200 and the rear wheel assembly 300 are folded inward synchronously. Finally, the folding and folding of the entire vehicle is completed.
[0078] In this application, when the frame 100 is opened and folded, the front wheel assembly 200 and the rear wheel assembly 300 can be opened and folded together with the frame 100 under the action of the front wheel linkage mechanism 108 and the rear wheel linkage mechanism 109. This eliminates the need for a separate operation step to open or fold the wheels, making the operation simpler and faster, suitable for parents to quickly fold the bike while holding their child, thus improving convenience. Furthermore, in this application, the front wheel assembly 200 and the rear wheel assembly 300 retract inwards synchronously with the frame 100, resulting in a smaller and flatter size for easier storage.
[0079] 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.
[0080] 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 comprising a frame having an unfolded state and a folded state, a locking mechanism for locking the frame in the unfolded state, and a front wheel assembly and a rear wheel assembly, characterized in that: The vehicle frame includes Upper bracket; The front bracket, the upper part of which is rotatably connected to the lower part of the upper bracket; The rear bracket has its upper part slidably connected to the front bracket via a first sliding member that is rotatably connected. The first connecting rod has its upper part rotatably connected to the upper bracket and its lower part rotatably connected to the first sliding member and / or the rear bracket; The base support is rotatably connected to the front support at its front end and rotatably connected to the rear support at its rear end. A front wheel linkage mechanism is disposed between the base bracket and the front wheel assembly and the front bracket; A rear wheel linkage mechanism is disposed between the bottom bracket and the rear wheel assembly and the rear bracket; The front wheel assembly is rotatably connected to the bottom of the front bracket and / or the front of the bottom bracket; The rear wheel assembly is rotatably connected to the bottom of the rear bracket and / or the rear of the bottom bracket; When the frame is opened or folded, the front wheel assembly and the rear wheel assembly open or fold inward together with the frame under the action of the front wheel linkage mechanism and the rear wheel linkage mechanism.
2. The foldable stroller according to claim 1, characterized in that: The front wheel linkage mechanism includes a second sliding member slidably disposed at the front of the base bracket, a third connecting rod rotatably connected between the second sliding member and the front bracket, and a fourth connecting rod rotatably connected between the second sliding member and the front wheel assembly.
3. A foldable stroller according to claim 1, characterized in that: The rear wheel linkage mechanism includes a third sliding member slidably disposed at the rear of the base bracket, a sixth link rotatably connected between the third sliding member and the rear bracket, and a fifth link rotatably connected between the third sliding member and the rear wheel assembly.
4. A foldable stroller according to claim 1, characterized in that: The frame also includes an upward push handle that can be retracted relative to the upper support.
5. A foldable stroller according to claim 4, characterized in that: The upper push handle is slidably engaged with the upper bracket and can extend or retract relative to it.
6. A foldable stroller according to claim 4, characterized in that: The locking mechanism includes a first locking mechanism disposed between the upper push handle and the upper bracket, and a second locking mechanism disposed at the rotatable connection between the upper bracket and the front bracket.
7. A foldable stroller according to claim 6, characterized in that: The first locking mechanism and the second locking mechanism are designed to work together; when the first locking mechanism is released and the push handle is retracted relative to the upper bracket, the second locking mechanism is automatically released.