Linked folding stroller
The four-bar linkage mechanism enables the rapid folding of the stroller, solving the problem of cumbersome operation of existing strollers and providing a convenient folding experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KUNSHAN VIGORKIDS CHILD PROD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-06-23
AI Technical Summary
Existing folding strollers have complex structures, are cumbersome to operate, require both hands to operate, and are inconvenient to carry.
It adopts a four-bar linkage mechanism, which triggers the linkage folding with a single push of the handlebar, and simultaneously drives the folding of various parts of the frame, simplifying the operation steps.
It enables quick and convenient folding of the entire vehicle without the need for both hands, reducing steps and conforming to ergonomic design.
Smart Images
Figure CN224392699U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of stroller technology, and more particularly to a folding stroller with linkage. Background Technology
[0002] Existing strollers are functional vehicles designed to facilitate infants' outdoor activities. They serve as a means of transportation for babies and are essential for infant care. With rising living standards, foldable strollers, in particular, are increasingly popular due to their portability. However, existing foldable strollers generally suffer from complex folding structures and cumbersome operation. Users need to unlock multiple locking devices sequentially and complete the folding process step by step, often requiring both hands, making them extremely inconvenient when carrying children or other items. Summary of the Invention
[0003] The purpose of this application is to provide a linked folding stroller with a novel and simple structure that enables the entire stroller to be folded quickly.
[0004] The technical solution of this application is: a linked folding stroller, including a frame having an unfolded state and a folded state, front wheels and rear wheels located at the bottom of the frame, and a locking mechanism for locking the frame in the unfolded state, the frame including:
[0005] pushrod assembly;
[0006] A front bracket, the upper part of which is rotatably connected to the lower part of the push rod assembly, and the front wheel is mounted on the bottom of the front bracket;
[0007] The lower support is rotatably connected to the front support at its front end, and the rear wheel is mounted at the rear end of the lower support.
[0008] The upper part of the rear bracket is rotatably connected to the lower part of the push rod assembly, and the lower part is rotatably connected to the rear part of the lower bracket.
[0009] The rear part of the seat rod is rotatably connected to the lower part of the push rod assembly;
[0010] The connecting rod is rotatably connected at its upper part to the seat rod and at its lower part to the front bracket.
[0011] As a preferred technical solution, the frame further includes a front armrest, the rear of which is rotatably connected to the rear of the seat post and the lower part of the push rod assembly, and a first limiting component is provided between the front armrest and the seat post, and a second limiting component is provided between the front armrest and the push rod assembly;
[0012] When the frame is in the unfolded state, the first limiting component restricts the front armrest from rotating upward, and the second limiting component restricts the front armrest from rotating downward, thereby locking the front armrest.
[0013] As a preferred technical solution, the first limiting component includes a first protrusion on the front armrest and a first limiting groove on the seat post that slides with the first protrusion.
[0014] As a preferred technical solution, the second limiting component includes a second protrusion disposed on the push rod assembly and a second limiting groove disposed on the front armrest and slidingly engaging with the second protrusion.
[0015] As a preferred technical solution, the rotational connection point between the connecting rod and the seat rod is located in front of the rotational connection point between the seat rod and the push rod assembly.
[0016] As a preferred technical solution, the push rod assembly includes a lower push rod rotatably connected to the front support, rear support, seat rod, and front armrest, and an upper push handle rotatably connected to the upper part of the lower push rod.
[0017] As a preferred technical solution, the locking mechanism includes a first locking mechanism disposed between the upper push handle and the lower push rod, and a second locking mechanism disposed between the lower push rod and the front bracket.
[0018] As a preferred technical solution, the second locking mechanism is unlocked by a folded push rod assembly.
[0019] Compared with the prior art, this application has the following advantages:
[0020] 1. The front support, lower support, rear support and lower push rod described in this application form a four-bar linkage mechanism. The movement of the four-bar linkage mechanism is triggered by a single action of pushing the handle upward, which simultaneously drives the lower push rod, rear support, lower support, front support, seat rod and front armrest to fold, reducing operation steps and achieving "one-step" quick folding. It does not require the operation of both hands and is more convenient to use.
[0021] 2. When folding this application, the upward push handle rotates forward and downward in accordance with ergonomics, and folding can be completed by applying force naturally, avoiding complicated operation. 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 structural diagram of the seat post and front armrest detached from the main frame in this application;
[0027] Figure 4 This is an assembly diagram of the seat post, front armrest, and lower push rod in this application when they are at a certain angle.
[0028] Figure 5 This is an assembly diagram of the seat post, front armrest, and lower push rod in this application when they are at another angle.
[0029] Figure 6 This is a three-dimensional structural diagram of the present application during the folding process;
[0030] Figure 7 This is a schematic diagram of the side structure of this application during the folding process;
[0031] Figure 8 This is a three-dimensional structural diagram of the present application when it is in a folded state;
[0032] Figure 9 This is a schematic diagram of the side structure of this application when it is in a folded state.
[0033] Among them: 1. Push rod assembly; 101. Upper push handle; 102. Lower push rod;
[0034] 2 front brackets;
[0035] 3. Lower support;
[0036] 4 rear brackets;
[0037] 5-seat pole;
[0038] 6-link system;
[0039] 7. Front armrests;
[0040] 8 front wheels;
[0041] 9 rear wheels;
[0042] 10 First limiting component; 1001 First protrusion; 1002 First limiting groove;
[0043] 11 Second limiting component; 1101 Second protrusion; 1102 Second limiting groove. Detailed Implementation
[0044] 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.
[0045] 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.
[0046] 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.
[0047] 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.
[0048] 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.
[0049] 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.
[0050] like Figures 1 to 9 As shown, a folding stroller includes a frame having an unfolded state and a folded state, front wheels 8 and rear wheels 9 located at the bottom of the frame, and a locking mechanism for locking the frame in the unfolded state. The frame includes:
[0051] Push rod assembly 1;
[0052] The front bracket 2 has its upper part rotatably connected to the lower part of the push rod assembly 1, and the front wheel 8 is installed at the bottom of the front bracket 2;
[0053] The lower support 3 is rotatably connected to the front support 2 at its front, and the rear wheel 9 is mounted at the rear of the lower support 3.
[0054] The upper part of the rear bracket 4 is rotatably connected to the lower part of the push rod assembly 1, and the lower part is rotatably connected to the rear part of the lower bracket 3.
[0055] Seat rod 5, the rear of which is rotatably connected to the lower part of the push rod assembly 1;
[0056] The upper part of the connecting rod 6 is rotatably connected to the seat rod 5, and the lower part is rotatably connected to the front bracket 2;
[0057] The front armrest 7 is rotatably connected to the rear of the seat rod 5 and the lower part of the push rod assembly 1. A first limiting component 10 is provided between the front armrest 7 and the seat rod 5, and a second limiting component 11 is provided between the front armrest 7 and the push rod assembly 1.
[0058] When the frame is in the unfolded state, the first limiting component 10 restricts the front armrest 7 from rotating upward, and the second limiting component 11 restricts the front armrest 7 from rotating downward, thereby locking the front armrest 7.
[0059] In this embodiment, preferably, the rear part of the front armrest 7, the rear part of the seat rod 5, and the lower part of the push rod assembly 1 are rotatably connected via the same pivot. That is, the three components—the front armrest 7, the seat rod 5, and the push rod assembly 1—are coaxially rotatably connected.
[0060] In this embodiment, the first limiting component 10 includes a first protrusion 1001 disposed on the front armrest 7 and a first limiting groove 1002 disposed on the seat post 5 and slidably engaged with the first protrusion 1001. When the frame is in the unfolded state, the first protrusion 1001 slides to the end of the first limiting groove 1002, at which point the front armrest 7 cannot continue to rotate upward, that is, the first limiting component 10 restricts the upward rotation of the front armrest 7.
[0061] In this embodiment, the second limiting component 11 includes a second protrusion 1101 disposed on the push rod assembly 1 and a second limiting groove 1102 disposed on the front armrest 7 and slidably engaged with the second protrusion 1101. When the frame is in the unfolded state, the second protrusion 1101 slides to the end of the second limiting groove 1102, at which point the front armrest 7 cannot continue to rotate downwards, that is, the second limiting component 11 restricts the downward rotation of the front armrest 7.
[0062] In this embodiment, the rotatable connection point between the connecting rod 6 and the seat rod 5 is located in front of the rotatable connection point between the seat rod 5 and the push rod assembly 1. When the front support 2 is in the unfolded state, the seat rod 5 automatically opens and enters the unfolded state through the linkage of the connecting rod 6.
[0063] In this embodiment, the push rod assembly 1 is preferably a folding push rod assembly, which includes a lower push rod 101 rotatably connected to the front support 2, the rear support 4, the seat rod 5, and the front armrest 6, and an upper push handle 102 rotatably connected to the upper part of the lower push rod 101. Of course, the push rod assembly 1 is not limited to this, and can also be other structures, such as a telescopic push rod assembly composed of an upper push rod and a lower push rod, etc.
[0064] In this embodiment, the front support 2, lower support 3, rear support 4, and lower push rod 101 form a four-bar linkage. When the frame is in the unfolded state, the rotational connection point between the lower support 3 and the front support 2 is located below and in front of the rotational connection point between the front support 2 and the lower push rod 101; the rotational connection point between the rear support 3 and the lower push rod 101 is located above and behind the rotational connection point between the front support 2 and the lower push rod 101; the rotational connection points between the seat post 5, the front armrest 6, and the lower push rod 101 are located above and behind the rotational connection point between the front support 2 and the lower push rod 101, and below and in front of the rotational connection point between the rear support 4 and the lower push rod 101.
[0065] In this embodiment, the locking mechanism includes a first locking mechanism disposed between the upper push handle 102 and the lower push rod 101, and a second locking mechanism disposed between the lower push rod 101 and the front bracket 2. The second locking mechanism is unlocked by the folded push rod assembly 1; that is, after the first locking mechanism is unlocked, the second locking mechanism will automatically release when the upper push handle 102 is folded relative to the lower push rod 101. This locking mechanism is a conventional structure in the prior art, and its structure varies. Since it is not the inventive point of this application, it is not shown in the drawings and will not be described in detail. Preferably, the unlocking operation component of the first locking mechanism is disposed on the upper push handle 102 to facilitate the unlocking operation.
[0066] The working principle of this application is as follows:
[0067] When the frame is in the unfolded state, the locking mechanism is in the locked state, so that the front support 2, lower support 3, rear support 4, push rod assembly 1 and seat post 5 are all kept in the unfolded position, while the front armrest 7 is restricted from rotating upward by the first limiting assembly 10 and restricted from rotating downward by the second limiting assembly 11, thereby achieving automatic locking.
[0068] When the frame is folded, the first locking mechanism is released, and the upper push handle 102 is rotated forward and downward. When the upper push handle 102 is folded and retracted relative to the lower push rod 101, the second locking mechanism is automatically released. At this time, the upper push handle 102 drives the lower push rod 101 and the rear support 4 to move downward and retract. Simultaneously, the lower support 3 drives the front support 2 to move closer to the rear support 4, and the above four-bar linkage folds. The upper push handle 102 and the lower push rod 101 move together to the rear side of the rear support 4. While the four-bar linkage is folding, it drives the seat post 5 to rotate, releasing the restriction on the front armrest 7. At this time, the front armrest 7 and the seat post 5 can retract relative to the lower push rod 101, thereby realizing the folding and retraction of the entire vehicle.
[0069] This application triggers the movement of a four-bar linkage mechanism by pushing the handle 102 upwards, which simultaneously drives the push rod 101, rear support 4, lower support 3, front support 2, seat post 5, and front armrest 6 to fold. This reduces the number of operation steps and achieves quick folding in one step, without the need for both hands to work together, making it more convenient to use.
[0070] 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.
[0071] 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, front wheels and rear wheels disposed at the bottom of the frame, and a locking mechanism for locking the frame in the unfolded state, characterized in that: The vehicle frame includes push rod assembly; A front bracket, the upper part of which is rotatably connected to the lower part of the push rod assembly, and the front wheel is mounted on the bottom of the front bracket; The lower support is rotatably connected to the front support at its front end, and the rear wheel is mounted at the rear end of the lower support. The upper part of the rear bracket is rotatably connected to the lower part of the push rod assembly, and the lower part is rotatably connected to the rear part of the lower bracket. The rear part of the seat rod is rotatably connected to the lower part of the push rod assembly; The connecting rod is rotatably connected at its upper part to the seat rod and at its lower part to the front bracket.
2. The linked folding stroller according to claim 1, characterized in that: The frame also includes a front armrest, the rear of which is rotatably connected to the rear of the seat post and the lower part of the push rod assembly, and a first limiting component is provided between the front armrest and the seat post, and a second limiting component is provided between the front armrest and the push rod assembly; When the frame is in the unfolded state, the first limiting component restricts the front armrest from rotating upward, and the second limiting component restricts the front armrest from rotating downward, thereby locking the front armrest.
3. The linked folding stroller according to claim 2, characterized in that: The first limiting component includes a first protrusion on the front armrest and a first limiting groove on the seat post that slides with the first protrusion.
4. The linked folding stroller according to claim 2, characterized in that: The second limiting component includes a second protrusion disposed on the push rod assembly and a second limiting groove disposed on the front armrest and slidingly engaging with the second protrusion.
5. A folding stroller according to claim 1, characterized in that: The rotatable connection point between the connecting rod and the seat rod is located in front of the rotatable connection point between the seat rod and the push rod assembly.
6. The linked folding stroller according to claim 1, characterized in that: The push rod assembly includes a lower push rod rotatably connected to the front support, rear support, seat rod, and front armrest, and an upper push handle rotatably connected to the upper part of the lower push rod.
7. A folding stroller according to claim 6, characterized in that: The locking mechanism includes a first locking mechanism disposed between the upper push handle and the lower push rod, and a second locking mechanism disposed between the lower push rod and the front bracket.
8. A folding stroller according to claim 7, characterized in that: The second locking mechanism is unlocked by the folded push rod assembly.