Foldable baby stroller

Abstract

A stroller frame of the foldable stroller comprises a seat frame, a front support, a rear support and an upper support which are connected in a rotating mode, a push handle which is installed at the upper end of the upper support and can be folded relative to the upper support, and a foldable supporting rod assembly which is arranged among the front support, the rear support and the push handle. The seat frame is rotationally connected with the front bracket through a linkage rod, the rear part of the seat frame is rotationally connected with the rear bracket, and a four-bar mechanism is formed among the seat frame, the linkage rod, the front bracket and the rear bracket; when the stroller frame is folded, the push handle and the upper support are folded on the rear side of the rear support, the front support is folded on the front side of the rear support, the seat frame is turned forwards and folded under the linkage action of the four-bar mechanism, and a rotating suture line between the backrest part and the cushion part on the cloth cover does not move backwards. Therefore, the backrest does not need to be broken into multiple sections in the length direction, and the situation that folding smoothness is affected by pulling of the cloth cover when the backrest plate is folded in folding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of strollers, in particular to a foldable stroller for children. Background Art

[0002] The prior art baby stroller is a tool cart designed to facilitate outdoor activities for babies, a means of transportation for babies to go out, and a necessity for taking care of babies. With the improvement of living standards, foldable baby strollers are more and more used in life because of their convenience in carrying.

[0003] However, when folding the strollers on the market, the seat frame is usually flipped backwards, and the rotation seam between the backrest and the seat cushion on the cloth cover needs to move backwards, which results in the backrest being broken into multiple sections in the length direction so that it can be folded along with the frame when the whole stroller is folded. However, when the backrest is broken and folded, the cloth cover of the backrest board will be pulled and affect the smoothness of folding. Summary of the invention

[0004] The utility model aims to provide a foldable baby stroller with a novel and simple structure. When the baby stroller is folded, the seat frame thereof flips forward, and the rotation seam line between the backrest part and the seat cushion part on the cloth cover does not move backward, so the backrest does not need to be broken into multiple sections in the length direction, thereby avoiding the backrest board being folded in half when folding, and the cloth cover being pulled to affect the folding smoothness.

[0005] The technical solution of the utility model is: a foldable stroller for children, comprising a stroller frame with an unfolded state and a folded state and a locking mechanism for locking the stroller frame in the unfolded state, the stroller frame comprising a seat frame, a front bracket, a rear bracket and an upper bracket rotatably connected, a push handle installed at the upper end of the upper bracket and foldable relative to the upper bracket, and a folding support rod assembly arranged between the front bracket, the rear bracket and the push handle, the seat frame is rotatably connected to the front bracket through a linkage rod, the rear part of the seat frame is rotatably connected to the rear bracket, and a four-bar linkage is formed between the seat frame, the linkage rod, the front bracket and the rear bracket; when the stroller frame is folded, the push handle and the upper bracket are folded and folded to the rear side of the rear bracket, the front bracket is folded to the front side of the rear bracket, and the seat frame is flipped forward and folded under the linkage action of the four-bar linkage.

[0006] As a preferred technical solution, the folding strut assembly includes a front strut and a rear strut, the front end of the front strut is rotatably connected to the front bracket, the rear end of the front strut is rotatably connected to the lower end of the rear strut, the upper end of the rear strut is rotatably connected to the lower end of the push handle, and the lower part of the rear strut is rotatably connected to the rear bracket.

[0007] As a preferred technical solution, the upper end of the rear bracket, the upper end of the front bracket and the lower end of the upper bracket are rotatably connected; the upper end of the rear bracket has a linkage portion extending upward, and the rear end of the seat frame is rotatably connected to the linkage portion; the upper end of the linkage rod is rotatably connected to the seat frame, the lower end of the linkage rod is rotatably connected to the front bracket, and the linkage rod is located in front of the linkage portion.

[0008] As a preferred technical solution, the upper part of the front bracket has a cross bar, and the lower end of the linkage rod is sleeved on the cross bar through a sleeve to realize the rotational connection between the two.

[0009] As a preferred technical solution, a footrest frame that can be retracted relative to it is installed at the front end of the seat frame. Preferably, a footrest angle adjustment mechanism is provided between the footrest frame and the seat frame.

[0010] As a preferred technical solution, the locking mechanism includes a first locking mechanism provided between the push handle and the upper bracket and a second locking mechanism provided between the upper bracket and the front bracket or between the upper bracket and the rear bracket. Preferably, the first locking mechanism and the second locking mechanism are a linkage unlocking structure. When the first locking mechanism is in the unlocked state, flipping the push handle forward can release the locking of the second locking mechanism. The unlocking component of the first locking mechanism is arranged on the push handle.

[0011] Compared with the prior art, the present application has the following advantages:

[0012] 1. When the stroller frame of the present utility model is folded, the push handle and the upper bracket are retracted and folded behind the rear bracket, the front bracket is folded in front of the rear bracket, and the seat frame is turned forward and folded under the linkage action of the four-bar linkage mechanism. The rotational sewing line between the backrest part and the seat cushion part of the cloth cover will not move backward. Therefore, the backrest does not need to be interrupted into multiple segments in the length direction, avoiding the pulling of the folded cloth cover by the backrest board during folding and affecting the folding smoothness.

[0013] 2. The push handle is rotatably connected to the upper bracket in the present utility model to form a three-fold stroller. This design makes the structure more compact after the whole vehicle is folded, which is beneficial to further reducing the volume of the whole vehicle after folding and is convenient for going out and carrying and storing.

[0014] 3. The first locking mechanism and the second locking mechanism in the present utility model adopt a linkage unlocking design, which has a more convenient unlocking operation function and is convenient for achieving the purpose of simply and quickly folding the baby stroller. Description of the Drawings

[0015] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the attached drawings required for the description of the embodiments. The attached drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can be obtained based on these attached drawings.

[0016] The structures, ratios, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical substantial significance. Any modification of the structure, change of the ratio relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present utility model.

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model in the unfolded state;

[0018] Figure 2 It is an assembled structural schematic diagram of the connection part between the seat frame and the front support, rear support, and upper support in the present utility model;

[0019] Figure 3 It is a side structural schematic diagram of the present utility model in the unfolded state;

[0020] Figure 4 It is Figure 3 a cross-sectional structural schematic diagram;

[0021] Figure 5 It is a side structural schematic diagram of the present utility model during the folding process;

[0022] Figure 6 It is Figure 5 a cross-sectional structural schematic diagram;

[0023] Figure 7 It is a side structural schematic diagram of the present utility model in the folded state;

[0024] Figure 8 It is Figure 7 a cross-sectional structural schematic diagram.

[0025] Wherein: 1 seat frame; 2 front support; 3 rear support; 31 linkage part; 4 upper support; 5 push handle; 6 folding strut assembly; 61 front strut; 62 rear strut; 7 linkage rod; 8 footrest frame; 9 backrest plate. Specific embodiments

[0026] To make the objectives, technical solutions and advantages of this application clearer, the following will clearly and completely describe the technical solutions of the embodiments of this application with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of this application without creative efforts fall within the scope of protection of this application. It can be understood that, without conflict, some technical means described in the various embodiments herein may be replaced or combined with each other.

[0027] In the description of the specification and claims of this application, if there are terms such as "first", "second", etc., they are only used to distinguish the described objects and do not have any sequential or technical meanings. Thus, the objects defined with "first", "second", etc. may explicitly or implicitly include one or more of such objects. Also, words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one, and "multiple" means not less than two.

[0028] In the description of the specification and claims of this application, if there are terms such as "connected", "installed", "fixed", "accommodated", etc., unless otherwise specified, they should all be understood in a broad sense. For example, "connected" can be a separable connection or an integral connection; it can be directly connected or indirectly connected through an intermediate medium; it can be a non-detachable connection or a detachable connection. Again, for example, "accommodated" does not necessarily mean that the whole is completely accommodated, and this concept also includes a situation where a part protrudes outside and is partially accommodated. For those skilled in the art, the specific meanings of the foregoing terms in this application can be understood according to specific circumstances.

[0029] In the description of the specification and claims of this application, if there are terms such as "upper", "lower", "horizontal", etc. indicating an orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the purpose of clearly and simply describing this application, rather than indicating or implying that the indicated element must have a specific direction, be constructed and operated in a specific orientation. These directional terms are relative concepts used for relative description and clarification, and can change accordingly with the change of the orientation in which the components are placed in the drawings. For example, if the device in the figure is flipped, the element described as "below" other elements will be positioned "above" other elements.

[0030] In the description of the specification and claims of this application, if there is a term "if", depending on the context, it can usually be interchanged with "when", "while", "in response to determining", or "in response to detecting".

[0031] In the description of the specification and claims of the present application, when there is a "direction" regarding motion, including motion with a direction component, the term "in the direction" is not necessarily understood as motion only in that one direction. For those skilled in the art, the specific meaning of the foregoing term in the present application can be understood according to the specific circumstances.

[0032] As Figures 1 to 8 shown, a foldable baby stroller includes a stroller frame having an unfolded state and a folded state, and a locking mechanism for locking the stroller frame in the unfolded state. The stroller frame includes a seat frame 1, a front bracket 2, a rear bracket 3, and an upper bracket 4 that are rotatably connected, a push handle 5 that is installed at the upper end of the upper bracket 4 and can be folded relative to it, and a folding strut assembly 6 provided between the front bracket 2, the rear bracket 3, and the push handle 5.

[0033] In this embodiment, the upper end of the rear bracket 3, the upper end of the front bracket 2, and the lower end of the upper bracket 4 are rotatably connected coaxially; the folding strut assembly 6 includes a front strut 61 and a rear strut 62. The front end of the front strut 61 is rotatably connected to the front bracket 2, the rear end of the front strut 61 is rotatably connected to the lower end of the rear strut 62, the upper end of the rear strut 62 is rotatably connected to the lower end of the push handle 5, and the lower part of the rear strut 62 is rotatably connected to the rear bracket 3.

[0034] In this embodiment, the seat frame 1 and the front bracket 2 are rotatably connected by a linkage rod 7, the rear part of the seat frame 1 is rotatably connected to the rear bracket 2, and a four-bar linkage mechanism is formed among the seat frame 1, the linkage rod 7, the front bracket 2, and the rear bracket 3.

[0035] In this embodiment, the upper end of the rear bracket 3 has an upwardly extending linkage portion 31, and the rear end of the seat frame 1 is rotatably connected to the linkage portion 31; the upper end of the linkage rod 7 is rotatably connected to the seat frame 1, the lower end of the linkage rod 7 is rotatably connected to the front bracket 2, and the linkage rod 7 is located in front of the linkage portion 31. Preferably, the upper part of the front bracket 2 has a cross bar, and the lower end of the linkage rod 7 is rotatably connected to the cross bar by a sleeve.

[0036] In this embodiment, when the stroller frame is in the unfolded state, the linkage portion 31 and the linkage rod 7 are preferably arranged obliquely backward and upward.

[0037] In this embodiment, a footrest 8 that can be folded relative to it is installed at the front end of the seat frame 1. Preferably, a footrest angle adjustment mechanism is provided between the footrest 8 and the seat frame 1. Since the angle adjustment mechanism between two rotating components is a common technology in the art and there are various types, no specific description and limitation are made here.

[0038] In this embodiment, the locking mechanism includes a first locking mechanism disposed between the push handle 5 and the upper bracket 4, and a second locking mechanism disposed between the upper bracket 4 and the front bracket 2 or between the upper bracket 4 and the rear bracket 3. Preferably, the first locking mechanism and the second locking mechanism are in a linkage unlocking structure. When the first locking mechanism is in an unlocked state, the push handle can be flipped forward to release the locking of the second locking mechanism. This design has a more convenient unlocking operation function, facilitating the purpose of simply and quickly folding the baby stroller. Since the linkage unlocking design between the above-mentioned first locking mechanism and the second locking mechanism already exists in the prior art and there are various types, no specific limitations or elaborations will be made here.

[0039] In this embodiment, the unlocking component of the first locking mechanism is preferably disposed on the push handle. The unlocking component can be an unlocking pinch or an unlocking pull handle, etc. Since the unlocking component is a common technology in the prior art and there are various types, no specific limitations or elaborations will be made here.

[0040] When the baby stroller leaves the factory, a cloth cover is installed on the stroller frame, and the cloth cover covers the seat frame 1 and the backrest plate 9. The rotating sewing line between the backrest part and the seat cushion part of the cloth cover is the rotating axis of the backrest part. Since the rear part of the seat frame 1 is rotatably connected to the linkage part 31 of the rear bracket 3, the rotating sewing line between the backrest part and the seat cushion part of the cloth cover remains stationary relative to the rear bracket whether the stroller frame is in a folded state or an unfolded state.

[0041] When the stroller frame of the present utility model is folded, the push handle 5 and the upper bracket 4 are folded and retracted to the rear side of the rear bracket 3, the front bracket 2 is retracted to the front side of the rear bracket 3, and the seat frame 1 is flipped forward and retracted under the linkage action of the four-bar mechanism. The rotating sewing line between the backrest part and the seat cushion part of its cloth cover will not move backward. Therefore, the backrest does not need to be interrupted into multiple segments in the length direction, avoiding the pulling of the folded cloth cover by the backrest plate during folding and affecting the folding smoothness.

[0042] As a preferred implementation of the present invention, in the description of this specification, the description referring to terms such as "preferred" and "optional" means that the specific features, structures, materials or characteristics described in connection with this embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0043] The above embodiments are only used to illustrate the detailed solutions of the present invention. The present invention is not limited to the above detailed solutions, that is, it does not mean that the present invention must rely on the above detailed solutions to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent substitution of each raw material of the products of the present invention, the addition of auxiliary components, the selection of specific methods, etc., all fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A foldable baby stroller, comprising a stroller frame having a deployed state and a folded state, and a locking mechanism for locking the stroller frame in the deployed state, characterized in that: The stroller frame includes a seat frame, a front bracket, a rear bracket and an upper bracket that are rotatably connected, a push handle mounted on the upper end of the upper bracket and capable of being folded relative thereto, and a folding strut assembly disposed between the front bracket, the rear bracket and the push handle. The seat frame is rotatably connected to the front bracket through a linkage rod. The rear portion of the seat frame is rotatably connected to the rear bracket. A four-bar linkage mechanism is formed among the seat frame, the linkage rod, the front bracket and the rear bracket. When the stroller frame is folded, the push handle is folded and retracted with the upper bracket and is retracted to the rear side of the rear bracket, the front bracket is retracted to the front side of the rear bracket, and the seat frame is turned forward and retracted under the linkage action of the four-bar linkage mechanism.

2. The foldable baby stroller according to claim 1, wherein: The folding strut assembly includes a front strut and a rear strut. The front end of the front strut is rotatably connected to the front bracket. The rear end of the front strut is rotatably connected to the lower end of the rear strut. The upper end of the rear strut is rotatably connected to the lower end of the push handle. The lower portion of the rear strut is rotatably connected to the rear bracket.

3. The foldable baby stroller according to claim 1, characterized in that: The upper end of the rear bracket, the upper end of the front bracket and the lower end of the upper bracket are rotatably connected. The upper end of the rear bracket has a linkage portion extending upward. The rear end of the seat frame is rotatably connected to the linkage portion. The upper end of the linkage rod is rotatably connected to the seat frame. The lower end of the linkage rod is rotatably connected to the front bracket. And the linkage rod is located in front of the linkage portion.

4. The foldable baby stroller according to claim 3, wherein: The upper portion of the front bracket has a cross bar. The lower end of the linkage rod is sleeved on the cross bar through a sleeve to achieve the rotational connection between the two.

5. The foldable baby stroller according to claim 1, wherein: A footrest frame that can be folded relative thereto is installed at the front end of the seat frame.

6. The foldable baby stroller according to claim 5, wherein: There is a footrest angle adjustment mechanism between the footrest frame and the seat frame.

7. A foldable baby stroller according to claim 1, characterized in that: The locking mechanism includes a first locking mechanism disposed between the push handle and the upper bracket and a second locking mechanism disposed between the upper bracket and the front bracket or between the upper bracket and the rear bracket.

8. The foldable baby stroller according to claim 7, wherein: The first locking mechanism and the second locking mechanism are a linkage unlocking structure. When the first locking mechanism is in an unlocked state, flipping the push handle forward can release the locking of the second locking mechanism.

9. The foldable baby stroller according to claim 8, wherein: The unlocking assembly of the first locking mechanism is disposed on the push handle.

Images