Foldable self-standing structure for baby stroller

Abstract

A foldable self-standing structure for a baby stroller, having a frame comprising a push handle assembly (1), a front support assembly (2), a rear support assembly (3) and a backrest rod assembly (4); front wheels (5) are mounted below the front support assembly, and rear wheels (6) are mounted below the rear support assembly; the lower end of the push handle assembly (1) and the upper end of the front support assembly (2) are respectively and rotatably connected to the upper end of the rear support assembly (3), and a linkage mechanism is provided among said three assemblies; the lower end of the backrest rod assembly (4) is rotatably connected to the linkage mechanism, and the upper end of the backrest rod assembly (4) is provided with a support foot (7); when the frame is folded, the front support assembly (2) and the push handle assembly (1) are respectively folded on the front and rear sides of the rear support assembly (3), the backrest rod assembly (4) overturns backwards to be folded on the rear side of the rear support assembly (3), and at this moment, the support foot (7) on the backrest rod assembly (4) and the rear wheels (6) jointly support the stroller body, thereby achieving self-standing. The structure is simple and novel, not only can maintain a stable standing state, but also has few parts and a small size after being folded, thus facilitating carrying and transportation.

Description

A foldable self-supporting structure for a baby carriage Technical Field

[0001] The invention relates to a foldable self-supporting structure for a baby carriage. Background Art

[0002] In the prior art, foldable stroller frames are mainly folded in two ways: one is a horizontal folding structure, that is, after folding, the longitudinal height of the entire stroller body is reduced and merged together. This folding structure is bulky after folding and inconvenient to carry; the other is a vertical folding structure, after folding, the front wheels are generally high and the rear wheels are low. Therefore, the front wheels and the rear wheels cannot jointly support the stroller body, making it difficult to be stable and self-standing. The entire stroller body needs to be flipped 90 degrees and then laid down, which is inconvenient to operate.

[0003] In order to solve the self-standing problem of the above-mentioned vertical folding baby stroller, some existing baby strollers are equipped with self-standing mechanisms. However, these self-standing mechanisms currently have the following defects: either the structure of the self-standing mechanism itself is relatively complex, or the structure of the baby stroller is relatively complex after the self-standing mechanism is applied to the foldable baby stroller; and the foldable baby stroller including the self-standing mechanism also has the defect of being large in size after folding.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to provide a foldable and self-standing structure for a baby carriage, which supports the carriage body through the support legs on the backrest rod assembly and the rear wheels, can be stable and self-standing, has a simple structure, few parts, and a small volume after folding, making it easy to carry and transport.

[0006] The technical solution of the present invention is: a foldable and self-standing structure for a baby carriage, comprising a frame with an unfolded position and a folded position, the frame comprising a push rod assembly, a front support assembly, a rear support assembly and a backrest rod assembly, a front wheel being installed below the front support assembly, a rear wheel being installed below the rear support assembly, the lower end of the push rod assembly and the upper end of the front support assembly being rotatably connected to the upper end of the rear support assembly, and a linkage mechanism being provided between the three, the lower end of the backrest rod assembly being rotatably connected to the linkage mechanism, and the upper end of the backrest rod assembly being provided with a supporting foot; when the frame is folded, the front support assembly and the push rod assembly are respectively retracted to the front and rear sides of the rear support assembly, and the backrest rod assembly is flipped back and retracted to the rear side of the rear support assembly, at which time the supporting feet on the backrest rod assembly and the rear wheels jointly support the vehicle body to achieve self-standing.

[0007] As a further improvement of the present invention, the linkage mechanism includes an upper connecting rod, a front connecting member and a rear connecting member, the front connecting member is rotatably connected to the front bracket assembly, the rear end of the front connecting member is rotatably connected to the front end of the rear connecting member, the upper end of the upper connecting rod is rotatably connected to the push rod assembly, and the lower end of the upper connecting rod is rotatably connected to the middle part of the rear connecting member.

[0008] As a further improvement of the present invention, the middle part of the rear connecting member has a first extension portion extending upward, and the rear end has a second extension portion extending rearward and upward, the lower end of the upper connecting rod is rotatably connected to the upper end of the first extension portion, and the lower end of the backrest rod assembly is rotatably connected to the upper end of the second extension portion.

[0009] As a further improvement of the present invention, the frame also includes a front armrest assembly and a front connecting rod, the front armrest assembly is rotatably connected to the rear bracket assembly, the upper end of the front connecting rod is rotatably connected to the front armrest assembly, and the lower end of the front connecting rod is rotatably connected to the front connecting member.

[0010] As a further improvement of the present invention, the frame further includes a seat rod assembly, and the seat rod assembly is installed on the front connecting member.

[0011] As a further improvement of the present invention, the support foot is fixed to the middle part of the upper end of the backrest rod assembly and protrudes from the backrest rod assembly.

[0012] As a further improvement of the present invention, a push handle assembly is provided at the upper end of the push rod assembly, which can be expanded and folded relative to the push rod assembly.

[0013] Compared with the prior art, the beneficial effects of the present application are: the present invention supports the vehicle body through the support legs on the backrest rod assembly and the rear wheels, can maintain a stable standing state, has a simple structure, few parts, and a small volume after folding, making it easy to carry and transport. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] The structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which the present invention can be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention.

[0016] FIG1 is a schematic diagram of the three-dimensional structure of the present invention in an expanded state;

[0017] FIG2 is a schematic side view of the structure of the present invention in an expanded state;

[0018] FIG3 is a schematic diagram of the three-dimensional structure of the present invention in the folding process;

[0019] FIG4 is a schematic diagram of the side structure of the present invention in the folding process;

[0020] FIG5 is a schematic diagram of the three-dimensional structure of the present invention in a folded state;

[0021] FIG6 is a schematic diagram of the side structure of the present invention in a folded state.

[0022] Among them: 1 push rod assembly; 2 front bracket assembly; 3 rear bracket assembly; 4 backrest rod assembly; 5 front wheel; 6 rear wheel; 7 support foot; 8 upper connecting rod; 9 front connecting piece; 10 rear connecting piece; 101 first extension; 102 second extension; 11 front armrest assembly; 12 front connecting rod; 13 cushion rod assembly; 14 push handle assembly. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. It is understood that, in the absence of conflict, some technical means of the various embodiments described herein can be replaced or combined with each other.

[0024] In the description and claims of this application, the terms "first," "second," etc., if used, are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. Thus, a term defined as "first," "second," etc. may explicitly or implicitly include one or more of such objects. Furthermore, "a," "an," and similar terms do not indicate a limitation on quantity, but rather indicate the presence of at least one, and "plurality" means at least two.

[0025] In the description of the specification and claims of this application, if there are terms such as "connect", "install", "fix", "accommodate", etc., unless otherwise specified, they should be understood in a broad sense. For example, "connection" can be a separate connection or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a non-detachable connection or a detachable connection. For another example, "accommodate" does not necessarily mean complete accommodation of the entire body. This concept also includes the accommodation of a part that protrudes from the outside. For those skilled in the art, the specific meanings of the aforementioned terms in this application can be understood according to the specific circumstances.

[0026] In the description and claims of this application, if there are terms such as "upper," "lower," and "horizontal" indicating orientations or positional relationships, these are based on the orientations or positional relationships shown in the accompanying drawings. They are used only to facilitate a clear and simplified description of this application and are not intended to indicate or imply that the elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. These directional terms are relative concepts and are used for relative description and clarification. They may change accordingly depending on the orientation of the components in the drawings. For example, if the device in the figure is turned over, elements described as "below" other elements would be positioned "above" the other elements.

[0027] In the description of the specification and claims of this application, if the term "if" is present, it can generally be interchanged with "when" or "at" or "in response to determining" or "in response to detecting", depending on the context.

[0028] In the description of the specification and claims of this application, if there is a "direction" of movement, including movement with a directional component, the term "in the direction" is not necessarily understood as movement only in that one direction. For those skilled in the art, the specific meaning of the aforementioned terms in this application can be understood according to the specific circumstances.

[0029] As shown in Figures 1 to 6, a foldable and self-supporting structure of a baby carriage includes a frame with an unfolded position and a folded position, the frame including a push rod assembly 1, a front bracket assembly 2, a rear bracket assembly 3 and a backrest rod assembly 4. A front wheel 5 is installed under the front bracket assembly 2, and a rear wheel 6 is installed under the rear bracket assembly 3. The lower end of the push rod assembly 1 and the upper end of the front bracket assembly 2 are rotatably connected to the upper end of the rear bracket assembly 3, and a linkage mechanism is provided between the three. The lower end of the backrest rod assembly 4 is rotatably connected to the linkage mechanism, and the upper end of the backrest rod assembly 4 is provided with a supporting foot 7.

[0030] In this embodiment, the linkage mechanism includes an upper connecting rod 8, a front connecting member 9, and a rear connecting member 10. The front connecting member 9 is rotatably connected to the front bracket assembly 2, and the rear connecting member 10 is rotatably connected to the rear bracket assembly 3. The rear end of the front connecting member 9 is rotatably connected to the front end of the rear connecting member 10, the upper end of the upper connecting rod 8 is rotatably connected to the push rod assembly 1, and the lower end of the upper connecting rod 8 is rotatably connected to the middle portion of the rear connecting member 10.

[0031] The rear connecting member 10 has a first extension portion 101 extending upward in the middle portion and a second extension portion 102 extending rearward and upward at the rear end. The lower end of the upper connecting rod 8 is rotatably connected to the upper end of the first extension portion 101, and the lower end of the backrest rod assembly 4 is rotatably connected to the upper end of the second extension portion 102. The rotational connection point between the second extension portion 102 and the backrest rod assembly 4 is located above and behind the rotational connection point between the rear connecting member 10 and the rear bracket assembly 3; the rotational connection point between the first extension portion 101 and the upper connecting rod 8 is located above and in front of the rotational connection point between the rear connecting member 10 and the rear bracket assembly 3.

[0032] In this embodiment, the frame also includes a front armrest assembly 11 and a front connecting rod 12. The front armrest assembly 11 is rotatably connected to the rear bracket assembly 3. The upper end of the front connecting rod 12 is rotatably connected to the front armrest assembly 11, and the lower end of the front connecting rod 12 is rotatably connected to the front connecting member 9.

[0033] In this embodiment, the frame further includes a seat rod assembly 13 , and the seat rod assembly 13 is mounted on the front connecting member 9 .

[0034] The front connecting member 9 is C-shaped with its opening facing rearward. Its rear lower end is pivotally connected to the front end of the rear connecting member 10. A fixing sleeve is formed on its upper portion for mounting with the seat rod assembly 13. The pivotal connection point between the upper end of the front connecting rod 12 and the front armrest assembly 11 is located above and forward of the pivotal connection point between the rear bracket assembly 3 and the front armrest assembly 11. The pivotal connection point between the lower end of the front connecting rod 12 and the front connecting member 9 is located below the seat rod assembly 13 and above and rearward of the pivotal connection point between the front bracket assembly 2 and the front connecting member 9.

[0035] In this embodiment, the support leg 7 can be a plastic support member, which is fixed to the middle of the upper end of the backrest rod assembly 4 and protrudes from the backrest rod assembly 4. This design has a simple structure and is easy to assemble, making it easy to install and replace the support leg 7.

[0036] In this embodiment, the push rod assembly 1 is provided with a push handle assembly 14 at its upper end, which can be expanded and retracted relative thereto. This design can further reduce the overall volume of the folded frame. Since this structure is common in the art, it will not be described in detail or limited here. Of course, the push handle assembly 14 and the push rod assembly 1 can also be configured as a telescopic structure. This structure is also common in the art and will not be described in detail or limited here.

[0037] The working principle of the present invention is:

[0038] When the frame is folded, the push handle assembly 14 is first folded or retracted relative to the push rod assembly 1, and then the push rod assembly 1 is rotated rearward and downward to be folded relative to the rear bracket assembly 3. During the rotation, under the linkage action of the upper connecting rod 8, the front side of the rear connecting member 10 rotates forward and downward around the rotation point between the rear connecting member 10 and the rear bracket assembly 3, and the rear side rotates forward around the rotation point between the rear connecting member 10 and the rear bracket assembly 3. After reaching a certain angle, the backrest rod assembly 4 flips backward and is folded behind the rear bracket assembly 3. At the same time, the rear side of the front connecting member 9 rotates rearward and downward around the rotation point between the front connecting member 9 and the front bracket assembly 2, which drives the front bracket assembly 2 to be folded toward the rear bracket assembly 3 and drives the front side of the seat cushion rod assembly 13 to flip up and be folded relative to the front bracket assembly 2. The front side of the front armrest assembly 11 flips downward under the linkage action of the front connecting rod 12 and is folded relative to the front bracket assembly 2. When the frame is folded to the folding position, the support legs 7 on the backrest rod assembly 4 reach the self-supporting position and together with the two rear wheels 6 form a three-point support for the vehicle body, thereby achieving self-support.

[0039] The invention has a simple and novel structure, can not only maintain a stable standing state, but also has fewer parts, a small volume after being folded, and is easy to carry and transport.

[0040] In this specification, the use of terms such as "preferred," "optional," and the like as preferred embodiments of the present invention indicates that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

[0041] The above embodiments are merely illustrative of the detailed embodiments of the present invention. The present invention is not limited to the detailed embodiments described above, nor does it necessarily rely on the detailed embodiments to be implemented. Those skilled in the art will appreciate that any improvements to the present invention, equivalent replacements of raw materials for the products of the present invention, addition of auxiliary ingredients, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

Claims

1. A foldable self-supporting structure for a baby carriage, comprising a frame having an unfolded position and a folded position, the frame comprising a push rod assembly, a front bracket assembly, a rear bracket assembly and a backrest rod assembly, a front wheel is installed below the front bracket assembly, and a rear wheel is installed below the rear bracket assembly, characterized in that: The lower end of the push rod assembly and the upper end of the front bracket assembly are rotatably connected to the upper end of the rear bracket assembly respectively, and a linkage mechanism is arranged between the three, the lower end of the backrest rod assembly is rotatably connected to the linkage mechanism, and the upper end of the backrest rod assembly is provided with a supporting foot; when the frame is folded, the front bracket assembly and the push rod assembly are respectively retracted to the front and rear sides of the rear bracket assembly, and the backrest rod assembly is flipped back and retracted to the rear side of the rear bracket assembly, at this time, the supporting feet on the backrest rod assembly and the rear wheels jointly support the vehicle body to achieve self-reliance.

2. A foldable self-supporting structure for a baby carriage according to claim 1, characterized in that: The linkage mechanism includes an upper connecting rod, a front connecting member and a rear connecting member, the front connecting member is rotatably connected to the front bracket assembly, the rear end of the front connecting member is rotatably connected to the front end of the rear connecting member, the upper end of the upper connecting rod is rotatably connected to the push rod assembly, and the lower end of the upper connecting rod is rotatably connected to the middle part of the rear connecting member.

3. A foldable self-supporting structure for a baby carriage according to claim 2, characterized in that: The middle part of the rear connecting member has a first extension part extending upward, and the rear end has a second extension part extending rearward and upward. The lower end of the upper connecting rod is rotatably connected to the upper end of the first extension part, and the lower end of the backrest rod assembly is rotatably connected to the upper end of the second extension part.

4. The foldable self-supporting structure of a baby carriage according to claim 2, characterized in that: The frame also includes a front armrest assembly and a front connecting rod. The front armrest assembly is rotatably connected to the rear bracket assembly. The upper end of the front connecting rod is rotatably connected to the front armrest assembly, and the lower end of the front connecting rod is rotatably connected to the front connecting piece.

5. The foldable self-supporting structure of a baby carriage according to claim 2, characterized in that: The frame also includes a seat rod assembly, which is mounted on the front connecting member.

6. The foldable self-supporting structure of a baby carriage according to claim 1, characterized in that: The supporting foot is fixedly mounted on the middle part of the upper end of the backrest rod assembly and protrudes from the backrest rod assembly.

7. The foldable self-supporting structure of a baby carriage according to claim 1, characterized in that: The upper end of the push rod assembly is provided with a push handle assembly which can be unfolded and folded relative to the push rod assembly.

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