Folding frame structure of baby carriage

Abstract

A frame comprises a push rod assembly, a front support, a rear support, a push handle, a bottom supporting rod and a rear supporting rod, the push rod assembly comprises a lower push rod and an upper push rod capable of telescopically sliding relative to the lower push rod, and the lower portion of the lower push rod, the upper portion of the front support and the upper portion of the rear support are rotationally connected; the upper end of the rear supporting rod is rotationally connected with the upper end of the upper push rod, the lower portion of the rear supporting rod is rotationally connected with the rear support, the front end of the rear supporting rod is rotationally connected with the rear end of the bottom supporting rod, and the front end of the bottom supporting rod is rotationally connected with the front support. When the frame is in the unfolding position, the upper push rod and the lower push rod of the push rod assembly are in a folded state; when the frame is in the folding position, the upper push rod and the lower push rod of the push rod assembly are in an extended state; the folding bicycle is novel and simple in structure, the whole bicycle can be quickly folded, the folding operation is labor-saving, and the folded bicycle is compact in overall structure, smaller in size and convenient to carry and store when going out.

Description

Technical Field

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

[0002] Existing strollers are utility 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 are increasingly popular due to their portability. However, existing strollers suffer from complex structures, still occupying considerable space when folded, and requiring considerable effort to fold. Therefore, there is a need for strollers that fold more efficiently, save storage space, and are easier to fold, making them more convenient to use and carry. Summary of the Invention

[0003] The purpose of this application is to provide a folding frame structure for children's strollers. The structure is novel and simple, and the whole stroller can be folded quickly. The folding operation is labor-saving, and the overall structure is compact and smaller in size after folding, making it easy to carry and store when going out.

[0004] The technical solution of this application is: a folding frame structure for a children's stroller, including a frame having an unfolded position and a folded position, and a locking mechanism for locking the frame in the unfolded position. The frame includes a push rod assembly, a front support with a front wheel assembly, a rear support with a rear wheel assembly, and a push handle. The push rod assembly includes a lower push rod and an upper push rod that can slide relative to it. The lower part of the lower push rod, the upper part of the front support, and the upper part of the rear support are rotatably connected. The frame also includes a bottom support rod and a rear support rod. The upper end of the rear support rod is rotatably connected to the upper end of the upper push rod, the lower part of the rear support rod is rotatably connected to the rear support, the front end of the rear support rod is rotatably connected to the rear end of the bottom support rod, and the front end of the bottom support rod is rotatably connected to the front support.

[0005] When the frame is in the unfolded position, the upper and lower push rods of the push rod assembly are in a retracted state; when the frame is in the folded position, the upper and lower push rods of the push rod assembly are in an extended state.

[0006] As a preferred technical solution, the upper push rod includes a connecting seat that is rotatably connected to the push handle, a docking portion formed below the connecting seat and corresponding to the outer diameter of the lower push rod, and an insertion portion formed below the docking portion that is inserted into the lower push rod and slidably engaged with it.

[0007] When the frame is in the unfolded position, the insertion part of the upper push rod is fully retracted into the lower push rod, and the bottom end face of its mating part abuts against the upper port of the lower push rod; when the frame is in the folded position, the insertion part of the upper push rod extends out of the lower push rod, and its mating part disengages from the upper port of the lower push rod and slides to its farthest stroke relative to the lower push rod.

[0008] As a preferred technical solution, the locking mechanism includes a first locking mechanism disposed between the push handle and the upper push rod and locking them when both are in the extended state, and a second locking mechanism disposed between the upper push rod and the lower push rod and locking them when both are in the retracted state.

[0009] As a preferred technical solution, the first locking mechanism and the second locking mechanism are linked unlocking structures. When the first locking mechanism is in the unlocked state, the second locking mechanism can be unlocked by flipping the push handle forward.

[0010] As a preferred technical solution, the unlocking component of the first locking mechanism is disposed on the push handle.

[0011] As a preferred technical solution, the rotational connection point between the rear support rod and the bottom support rod is located in front of the rotational connection point between the rear support rod and the rear bracket;

[0012] When the push handle is flipped forward and pressed down, the push rod assembly and the rear support rod fold and retract relative to the rear bracket. At this time, the lower part of the rear support rod rotates around the rotation point between it and the rear bracket and drives the rotation point of the rear support rod and the bottom support rod to move upward, thereby driving the front bracket to move closer to the rear bracket.

[0013] As a preferred technical solution, the front support and the rear support are respectively provided with a first connecting lug and a second connecting lug extending rearward. The front end of the bottom support rod is rotatably connected to the front support by rotating with the first connecting lug, and the lower part of the rear support rod is rotatably connected to the rear support by rotating with the second connecting lug.

[0014] Compared with the prior art, this application has the following advantages: the structure of this application is novel and simple, which can realize the quick folding of the whole vehicle, the folding operation is labor-saving, the overall structure is compact after folding, the volume is smaller, and it is convenient to carry and store when going out. Attached Figure Description

[0015] 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.

[0016] 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.

[0017] Figure 1 This is a three-dimensional structural diagram of the present application at a certain angle when it is in the unfolded state;

[0018] Figure 2 This is a three-dimensional structural diagram of the present application in its unfolded state from another angle;

[0019] Figure 3 This is a side view of the structure of this application in its unfolded state;

[0020] Figure 4 This is a side sectional view of the structure of this application in its unfolded state;

[0021] Figure 5 This is a schematic diagram of the side structure of this application during the folding process;

[0022] Figure 6 This is a side sectional view of the structure of this application during the folding process;

[0023] Figure 7 This is a schematic diagram of the side structure of this application when it is in a folded state.

[0024] The components include: 1. Push rod assembly; 101. Lower push rod; 102. Upper push rod; 1021. Connecting seat; 1022. Connecting part; 1023. Insertion part; 2. Front bracket; 201. First connecting ear; 3. Rear bracket; 301. Second connecting ear; 4. Push handle; 5. Front wheel assembly; 6. Rear wheel assembly; 7. Bottom support rod; 8. Rear support rod; 9. Unlocking assembly. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] like Figures 1 to 7As shown, a folding frame structure for a children's stroller includes a frame with an unfolded position and a folded position, and a locking mechanism for locking the frame in the unfolded position. The frame includes a push rod assembly 1, a front support 2 with a front wheel assembly 5, a rear support 3 with a rear wheel assembly 6, and a push handle 4. The push rod assembly 1 includes a lower push rod 101 and an upper push rod 102 that can slide relative to it. The lower part of the lower push rod 101, the upper part of the front support 2, and the upper part of the rear support 3 are rotatably connected. The frame also includes a bottom support rod 7 and a rear support rod 8. The upper end of the rear support rod 8 is rotatably connected to the upper end of the upper push rod 102, the lower part of the rear support rod 8 is rotatably connected to the rear support 3, the front end of the rear support rod 8 is rotatably connected to the rear end of the bottom support rod 7, and the front end of the bottom support rod 7 is rotatably connected to the front support 2.

[0032] In this embodiment, the upper push rod 102 includes a connecting seat 1021 rotatably connected to the push handle 4, a docking portion 1022 formed below the connecting seat 1021 and corresponding to the outer diameter of the lower push rod 101, and an insertion portion 1023 formed below the docking portion 1022 and inserted into the lower push rod 101 and slidably engaged with it.

[0033] In this embodiment, the locking mechanism includes a first locking mechanism disposed between the push handle 4 and the upper push rod 102 and locking them when both are in the extended state, and a second locking mechanism disposed between the upper push rod 102 and the lower push rod 101 and locking them when both are in the retracted state.

[0034] Preferably, the first locking mechanism and the second locking mechanism are linked unlocking structures. When the first locking mechanism is in the unlocked state, flipping the push handle 4 forward will release the second locking mechanism. Since the linked unlocking structure is a conventional technology in this field and there are various types of structures, specific limitations and descriptions are not made here.

[0035] In this embodiment, the unlocking component 9 of the first locking mechanism is preferably disposed on the push handle 4. In the embodiment diagram, it is preferably disposed at the middle position of the top of the push handle 4, which can simultaneously control the unlocking of the first locking mechanisms on both sides, making operation more convenient. Since the unlocking component is a conventional technology in this technical field and has various structural types, specific limitations and descriptions are not made here.

[0036] In this embodiment, the front support 2 and the rear support 3 each have a rearwardly extending first connecting lug 201 and a second connecting lug 301. The front end of the bottom support rod 7 is rotatably connected to the front support 2 by rotating with the first connecting lug 201, and the lower part of the rear support rod 8 is rotatably connected to the rear support 3 by rotating with the second connecting lug 301. The rotatable connection point between the rear support rod 8 and the bottom support rod 7 is located in front of the rotatable connection point between the rear support rod 8 and the rear support 3.

[0037] The working principle of this application is as follows:

[0038] When the frame is in the unfolded position, the front support 2, push rod assembly 1, push handle 4, bottom support rod 7 and rear support rod 8 are all arranged at an angle with the front lower than the rear, and the rear support 3 is arranged at an angle with the front higher than the rear; the upper push rod 102 and the lower push rod 101 of the push rod assembly 1 are in a retracted state, that is, the insertion part 1023 of the upper push rod 102 is completely retracted into the lower push rod 101, and the bottom end face of its docking part 1022 abuts against the upper port of the lower push rod 101.

[0039] When the frame needs to be folded, firstly, the first locking mechanism is unlocked by operating the unlocking component 9 to release the lock on the push handle 4 and the upper push rod 102. Then, the push handle 4 is flipped forward and pressed down. When the push handle 4 rotates, the second locking mechanism is automatically released. Under the downward pressure, the push rod assembly 1 and the rear support rod 8 flip backward and downward and fold together relative to the rear support 3. At the same time, the upper push rod 102 and the lower push rod 101 of the push rod assembly 1 gradually begin to extend. At this time, the lower part of the rear support rod 8 rotates around the rotation point between it and the rear support 3 and drives the rotation point of the rear support rod 8 and the bottom support rod 7 to move upward. The bottom support rod 7 folds together relative to the front support 2 and drives the front support 2 to move closer to the rear support 3.

[0040] When the frame is in the folded position, the upper push rod 102 and the lower push rod 101 of the push rod assembly 1 are in the extended state, that is, the insertion part 1023 of the upper push rod 102 extends out of the lower push rod 101, and its docking part 1022 disengages from the upper port of the lower push rod 101 and slides to the farthest stroke relative to the lower push rod 101.

[0041] This application features a novel and simple structure that enables rapid folding of the entire vehicle. The folding operation is labor-saving, and the overall structure is compact and smaller in size after folding, making it easy to carry and store when traveling.

[0042] 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.

[0043] 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 frame structure for a children's stroller, comprising a frame having an unfolded position and a folded position, and a locking mechanism for locking the frame in the unfolded position, the frame comprising a push rod assembly, a front support having a front wheel assembly, a rear support having a rear wheel assembly, and a push handle, characterized in that: The push rod assembly includes a lower push rod and an upper push rod that can slide telescopically relative to it. The lower part of the lower push rod, the upper part of the front support, and the upper part of the rear support are rotatably connected. The frame also includes a bottom support rod and a rear support rod. The upper end of the rear support rod is rotatably connected to the upper end of the upper push rod, the lower part of the rear support rod is rotatably connected to the rear support, the front end of the rear support rod is rotatably connected to the rear end of the bottom support rod, and the front end of the bottom support rod is rotatably connected to the front support. When the frame is in the unfolded position, the upper push rod and the lower push rod of the push rod assembly are in the retracted state; When the frame is in the folded position, the upper and lower push rods of the push rod assembly are in the extended state.

2. The folding frame structure for a children's stroller according to claim 1, characterized in that: The upper push rod includes a connecting seat rotatably connected to the push handle, a docking part formed below the connecting seat and corresponding to the outer diameter of the lower push rod, and an insertion part formed below the docking part and inserted into the lower push rod and slidingly engaged with it; When the frame is in the unfolded position, the insertion part of the upper push rod is fully retracted into the lower push rod, and the bottom end face of its mating part abuts against the upper port of the lower push rod; when the frame is in the folded position, the insertion part of the upper push rod extends out of the lower push rod, and its mating part disengages from the upper port of the lower push rod and slides to its farthest stroke relative to the lower push rod.

3. The folding frame structure for a children's stroller according to claim 1, characterized in that: The locking mechanism includes a first locking mechanism disposed between the push handle and the upper push rod, which locks them when both are in the extended state, and a second locking mechanism disposed between the upper push rod and the lower push rod, which locks them when both are in the retracted state.

4. The folding frame structure for a children's stroller according to claim 3, characterized in that: The first locking mechanism and the second locking mechanism are linked unlocking structures. When the first locking mechanism is in the unlocked state, flipping the push handle forward will unlock the second locking mechanism.

5. The folding frame structure for a children's stroller according to claim 4, characterized in that: The unlocking component of the first locking mechanism is located on the push handle.

6. The folding frame structure for a children's stroller according to claim 1, characterized in that: The rotatable connection point between the rear support rod and the bottom support rod is located in front of the rotatable connection point between the rear support rod and the rear bracket; When the push handle is flipped forward and pressed down, the push rod assembly and the rear support rod fold and retract relative to the rear bracket. At this time, the lower part of the rear support rod rotates around the rotation point between it and the rear bracket and drives the rotation point of the rear support rod and the bottom support rod to move upward, thereby driving the front bracket to move closer to the rear bracket.

7. The folding frame structure for a children's stroller according to claim 1, characterized in that: The front support and the rear support are respectively provided with a first connecting lug and a second connecting lug extending rearward. The front end of the bottom support rod is rotatably connected to the front support by rotating with the first connecting lug, and the lower part of the rear support rod is rotatably connected to the rear support by rotating with the second connecting lug.

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