Folding stroller

By introducing a synchronous rotation mechanism and locking mechanism in the children's car, the handle and front wheel assembly are simultaneously closed on both sides of the frame when folded, solving the problem of space and inconvenience in carrying the existing children's car, and achieving quick and simple folding and miniaturized carry.

CN110775185BActive Publication Date: 2024-12-27GOODBABY CHILD PROD CO LTD
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Patent Information

Application Number
CN201911015189.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2019-10-24
Publication Date
2024-12-27
Estimated Expiration
2039-10-24

AI Technical Summary

Technical Problem

The existing children's car takes up space and is inconvenient to carry when not in use, especially the handle and front wheels are difficult to fold, which makes it difficult to design the folding structure.

Method used

A folding children's car including a handle front wheel assembly and a synchronous rotation mechanism is designed, and the handle bar and the front wheel support bar are rotated in a synchronous manner to make it close to the frame when folded, and the locking mechanism ensures simplicity of operation and overall closing.

Benefits of technology

It realizes the quick and simple folding of the children's car, reduces the size, is easy to carry, and does not occupy space, while ensuring stability and convenient operation after folding.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses a folding baby stroller, comprising a frame, a handlebar front wheel assembly pivotally connected to the front of the frame, the handlebar front wheel assembly comprising a handlebar rod, a front wheel support rod, a handle connected to the upper part of the handlebar rod, and a front wheel assembly connected to the lower part of the front wheel support rod, the lower part of the handlebar rod and the upper part of the front wheel support rod are connected to each other in a synchronous rotation mechanism and can be synchronously rotated, the rotation axis between the handlebar rod and the front wheel support rod and the rotation axis between the handlebar front wheel assembly and the frame are arranged at an angle, the folding baby stroller has an open state and a folding state, when it is in the folding state, the handlebar rod and the front wheel support rod are close to each other and are close to the frame. When the folding baby stroller is folded, the handlebar rod and the front wheel support rod can be synchronously rotated and retracted relative to the frame, the folding operation is simple and quick, the whole vehicle has a small volume after folding, does not occupy space, and is easy to carry.
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Description

Technical Field

[0001] The invention relates to a foldable baby carriage. Background Art

[0002] A baby stroller is a common children's toy for children to ride on. The baby stroller generally includes a frame crossbar, a rear wheel support frame connected to the rear of the frame crossbar, a rear wheel installed at the bottom of the rear wheel support frame, and a front fork member pivotally connected to the front of the frame crossbar. The top of the front fork member is connected to a handle, and the bottom of the front fork member is connected to a front wheel. A baby stroller that cannot be folded takes up a lot of space when not in use and is inconvenient to carry. In the prior art, it is difficult to design a baby stroller with the above structure into a foldable structure, especially the handle and the front wheel are difficult to fold. Summary of the invention

[0003] In order to solve the above problems, an object of the present invention is to provide a foldable baby stroller.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is: a foldable baby stroller, including a frame, a handlebar front wheel assembly pivotally connected to the front part of the frame, the handlebar front wheel assembly including a handlebar rod, a front wheel support rod, and a front wheel assembly connected to the lower part of the front wheel support rod, the lower part of the handlebar and the upper part of the front wheel support rod are connected to each other so as to be able to rotate synchronously through a synchronous rotation mechanism, the rotation axis of the synchronous rotation mechanism is arranged in the left-right direction, and the rotation axis of the handlebar front wheel assembly rotating around the frame extends in the up-down direction, and the foldable baby stroller has an open state and a folded state. When it is in the folded state, the handlebar rod and the front wheel support rod are close to each other and are both close to the frame.

[0005] Furthermore, the synchronous rotation mechanism includes a first gear fixedly connected to the lower part of the handlebar, and a second gear fixedly connected to the upper part of the front wheel support rod, and the first gear and the second gear are meshed.

[0006] Furthermore, the handlebar front wheel assembly also includes a base, which is pivotally connected to the front part of the frame via a rotating shaft, and the first gear and the second gear are both rotatably connected to the base.

[0007] Furthermore, when the foldable baby stroller is in the open state, the axis center line of the handle bar coincides with the axis center line of the front wheel support rod.

[0008] Furthermore, the handlebar front wheel assembly also includes a base, which is pivotally connected to the front part of the frame via a rotating shaft, and the lower part of the handlebar rod and the upper part of the front wheel support rod are rotatably connected to the base via a synchronous rotation mechanism, and a first locking mechanism is provided between the handlebar rod, the front wheel support rod and the base for locking the relative positions of the three when the folding baby carriage is in an open state.

[0009] Furthermore, the first locking mechanism includes front locking grooves respectively arranged on the handle rod and the front wheel support rod, an unlocking member movably connected to the base, and two front locking hooks arranged on the unlocking member and respectively detachably connected to the front locking grooves on the handle rod and the front wheel support rod.

[0010] Furthermore, the first locking mechanism also includes an elastic member connected between the base and the unlocking member and applying force to the unlocking member to connect the front locking hook with the front locking groove.

[0011] Furthermore, the frame includes a frame cross bar whose front portion is pivotally connected to the handlebar front wheel assembly, two rear wheel support rods whose upper portion is rotationally connected to the rear of the frame cross bar and are respectively located on the left and right sides of the frame cross bar, and two connecting rods whose one end is rotatably and slidably connected to the frame cross bar and are respectively located on the left and right sides of the frame cross bar, the other ends of the two connecting rods are respectively rotationally connected to the rear wheel support rods on the same side, and the bottoms of the two rear wheel support rods are respectively connected to the rear wheels. When the folding baby stroller is in a folded state, the handlebar, the front wheel support rod, the connecting rod, and the rear wheel support rod are all close to the frame cross bar.

[0012] Furthermore, when the foldable baby stroller is in the folded state, the front wheel assembly is close to the rear portion of the frame cross bar, and the rear wheel is close to the front portion of the frame cross bar.

[0013] Furthermore, a slider is slidably connected to the frame crossbar, and one end of the two connecting rods is rotatably connected to the slider.

[0014] Due to the adoption of the above technical solution, the foldable children's bicycle is configured with the original front fork member as two rotatable rods arranged up and down, namely the handle rod and the front wheel support rod, and when folding, the two rods can rotate synchronously and be retracted relative to the frame, and the handle and the front wheel are retracted to the upper and lower sides of the frame respectively by rotating the handle rod and the front wheel support rod. The folding operation is simple and quick, and the whole bicycle is small in size after folding, does not take up space, and is easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a schematic diagram of the side structure of a foldable baby stroller in an open state according to an embodiment of the present invention;

[0016] Attached Figure 2 For attachment Figure 1 A schematic diagram of the partial structure of the connection between the middle handlebar, the front wheel support rod and the base;

[0017] Attached Figure 3 For attachment Figure 1 A schematic diagram of the structure of a foldable baby stroller from a top view;

[0018] Attached Figure 4 For attachment Figure 1 The side view of the foldable baby stroller in the folded state is shown;

[0019] Attached Figure 5 For attachment Figure 4 A schematic diagram of the partial structure of the connection between the middle handlebar, the front wheel support rod and the base;

[0020] Attached Figure 6 For attachment Figure 4 A schematic diagram of the structure of a foldable baby stroller from a top view;

[0021] The numbers in the figure are:

[0022] 1. Frame crossbar; 2. Handlebar; 3. Front wheel support bar; 4. Rear wheel support bar; 5. Connecting rod; 6. Front wheel assembly; 7. Rear wheel; 8. Slider; 9. Handlebar; 10. Base; 11. First gear; 12. Second gear; 13. First joint; 14. Second joint; 15. Rotating shaft; 16. Front locking slot; 17. Unlocking piece; 18. Front locking hook; 19. Rear locking hook; 20. Rear locking slot; 21. Elastic piece; 22. Pull button. DETAILED DESCRIPTION

[0023] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0024] From the attached Figure 1 To Attachment Figure 6 As can be seen from the structural diagram of the embodiment, the foldable baby stroller in this embodiment includes a frame, a handlebar and a front wheel assembly pivotally connected to the front part of the frame.

[0025] The handlebar front wheel assembly includes a handlebar rod 2, a front wheel support rod 3, a handle 9 connected to the upper part of the handlebar rod 2, and a front wheel assembly 6 connected to the lower part of the front wheel support rod 3. The lower part of the handlebar rod 2 and the upper part of the front wheel support rod 3 are synchronously rotatably connected through a synchronous rotation mechanism. Specifically, the handlebar front wheel assembly also includes a base, the base 10 is pivotally connected to the front part of the frame through a rotating shaft 15, and the lower part of the handlebar rod 2 and the upper part of the front wheel support rod 3 are rotatably connected to the base 10 through a synchronous rotation mechanism.

[0026] The rotation axis of the synchronous rotation mechanism and the rotation axis between the handlebar front wheel assembly and the frame are set at an angle. Specifically, the rotation axis of the synchronous rotation mechanism is set in the left-right direction, and the rotation axis of the handlebar front wheel assembly rotating around the frame extends in the up-down direction. The rotation axis of the synchronous rotation mechanism here refers to the rotation axis of the relative rotation between the handlebar 2 and the front wheel support rod 3. The folding baby stroller has an open state and a folded state. When the folding baby stroller is in the open state, the axis of the handlebar 2 coincides with the axis of the front wheel support rod 3; when the folding baby stroller is in the folded state, the handlebar 2 and the front wheel support rod 3 are close to each other and both are close to the frame.

[0027] In a more preferred embodiment, the synchronous rotation mechanism includes a first gear 11 fixedly connected to the lower part of the handlebar 2, and a second gear 12 fixedly connected to the upper part of the front wheel support rod 3, and the first gear 11 and the second gear 12 are meshed. The two meshing gears enable the handlebar 2 and the front wheel support rod 3 to rotate when one of them rotates, and the other can rotate synchronously. Specifically, the first gear 11 and the second gear 12 are both rotatably connected to the base 10 mentioned above.

[0028] A first locking mechanism is provided between the handlebar 2, the front wheel support rod 3 and the base 10 for locking the relative positions of the three when the foldable baby stroller is in an opened state.

[0029] In this embodiment, a specific structure of a first locking mechanism is provided, which includes a front locking groove 16 respectively arranged on the handle bar 2 and the front wheel support rod 3, an unlocking member 17 movably connected to the base 10, and two front locking hooks 18 arranged on the unlocking member 17 and respectively detachably connected to the front locking groove 16 on the handle bar 2 and the front wheel support rod 3. When the first locking mechanism is locked, the front locking hook 18 on the unlocking member 17 is connected to the front locking groove 16 on the handle bar 2 and the front wheel support rod 3, so that the handle bar 2 and the front wheel support rod 3 cannot rotate. A pull button 22 is provided on the unlocking member 17. When unlocking, the pull button 22 is pulled to move the unlocking member 17, so that the front locking hook 18 is separated from the front locking groove 16, and the handle bar 2 and the front wheel support rod 3 can rotate. An elastic member 21 is provided between the base 10 and the unlocking member 17 to apply force to the unlocking member 17 so that the front locking hook 18 is connected to the front locking groove 16. In this embodiment, the elastic member 21 is a tension spring.

[0030] In this embodiment, the frame includes a frame cross bar 1 whose front portion is pivotally connected to the handlebar front wheel assembly described above, two rear wheel support rods 4 whose upper portion is rotationally connected to the rear portion of the frame cross bar 1 and respectively located on the left and right sides of the frame cross bar 1, and two connecting rods 5 whose one end is both rotationally and slidably connected to the frame cross bar 1 and respectively located on the left and right sides of the frame cross bar 1. Specifically, a slider 8 is slidably connected to the frame cross bar 1, and one end of the two connecting rods 5 is rotationally connected to the slider 8. The other ends of the two connecting rods 5 are rotationally connected to the rear wheel support rods 4 on the same side, and the bottoms of the two rear wheel support rods 4 are respectively connected to the rear wheels 7. When the folding baby stroller is in a folded state, the handlebar 2, the front wheel support rod 3, the connecting rod 5, and the rear wheel support rod 4 are all close to the frame cross bar 1. Specifically, the front wheel assembly 6 is close to the rear portion of the frame cross bar 1, and the rear wheel 7 is close to the front portion of the frame cross bar 1.

[0031] A second locking mechanism is provided between the slider 8 and the frame crossbar 1 to lock the relative position of the two when the foldable baby stroller is in the open state. The second locking mechanism can adopt the structure in the prior art, and since the structure of the second locking mechanism is not the focus of the present invention, it will not be described in detail.

[0032] This embodiment also provides a locking structure, which can lock the handle bar 2 and the front wheel support bar 3 with the position of the frame after the baby stroller is folded. Since the handle bar 2 and the front wheel support bar 3 rotate synchronously, the locking structure only needs to lock one of them with the frame. The specific structure is that the handle bar 2 or the front wheel support bar 3 has a rear locking hook 19. In this embodiment, the locking hook 19 is arranged on the handle bar 2, and the slider 8 has a rear locking groove 20. When the folding baby stroller is in the folded state, the rear locking hook 19 is connected to the rear locking groove 20. This structure not only locks the position of the handle bar 2 and the front wheel support bar 3, but also locks the position of the rear wheel support bar 4 and the connecting rod 5, so that the folding baby stroller as a whole remains in the folded state.

[0033] In this embodiment, the front wheel assembly 6 is fixedly connected to the front wheel support rod 3. In another embodiment, the front wheel assembly 6 is pivotally connected to the front wheel support rod 3. When the baby stroller is folded, the front wheel assembly 6 is rotated 90° relative to the front wheel support rod 3, so that after folding, the side surface of the front wheel in the front wheel assembly 6 faces the frame cross bar 1, thereby further reducing the volume of the baby stroller after folding.

[0034] Working principle:

[0035] When the baby stroller is folded, after unlocking the first locking mechanism and the second locking mechanism, the handlebar 2 and the front wheel support rod 3 are rotated backward to make them close to the frame cross bar 1, and the rear wheel support rod 4 is rotated forward. The slider 8 slides and drives the rear wheel support rods 4 and the connecting rod 5 on the left and right sides to retract toward the frame cross bar 1. After all parts are completely retracted, the rear locking hook 19 on the handlebar 2 is connected to the rear locking groove 20 on the slider 8 to keep the baby stroller in the folded state.

[0036] The folding baby stroller in the above-mentioned embodiment configures the original front fork member as two rotatable rods arranged up and down, namely, a handlebar rod and a front wheel support rod, and when folding, the two rods can rotate synchronously and be retracted relative to the frame. The handlebar rod and the front wheel support rod are rotated so that the handle and the front wheel are retracted to the upper and lower sides of the frame respectively. The folding operation is simple and quick. After the whole stroller is folded, the volume is small, no space is occupied, and it is easy to carry.

[0037] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A foldable baby stroller, comprising a frame, a handlebar and a front wheel assembly pivotally connected to the front of the frame, characterized in that: The handlebar front wheel assembly comprises a handlebar rod (2), a front wheel support rod (3), and a front wheel assembly (6) connected to the lower part of the front wheel support rod (3); the lower part of the handlebar rod (2) and the upper part of the front wheel support rod (3) are connected to each other in a synchronous rotational manner via a synchronous rotational mechanism; the rotational axis of the synchronous rotational mechanism extends in the left-right direction; the rotational axis of the handlebar front wheel assembly rotating around the frame extends in the up-down direction; the folding baby stroller has an open state and a folded state; when it is in the folded state, the handlebar rod (2) and the front wheel support rod (3) are close to each other and are close to the frame; The handlebar front wheel assembly further comprises a base, the base (10) being pivotally connected to the front part of the frame via a rotating shaft (15); the lower part of the handlebar (2) and the upper part of the front wheel support rod (3) are rotatably connected to the base (10) via a synchronous rotation mechanism; a first locking mechanism is provided between the handlebar (2), the front wheel support rod (3) and the base (10) for locking the relative positions of the three when the folding baby carriage is in an open state; the first locking mechanism comprises front locking grooves (16) respectively arranged on the handlebar (2) and the front wheel support rod (3); an unlocking member (17) movably connected to the base (10); and two front locking hooks (18) arranged on the unlocking member (17) and respectively detachably connected to the front locking grooves (16) on the handlebar (2) and the front wheel support rod (3); The frame comprises a frame cross bar (1) whose front portion is pivotally connected to the handlebar front wheel assembly, two rear wheel support rods (4) whose upper portion is rotatably connected to the rear portion of the frame cross bar (1) and respectively located on the left and right sides of the frame cross bar (1), and two connecting rods (5) whose one end is rotatably and slidably connected to the frame cross bar (1) and respectively located on the left and right sides of the frame cross bar (1), the other ends of the two connecting rods (5) are respectively rotatably connected to the rear wheel support rods (4) on the same side, and the bottoms of the two rear wheel support rods (4) are respectively connected to rear wheels (7), and when the foldable baby stroller is in a folded state, the handlebar (2), the front wheel support rod (3), the connecting rod (5), and the rear wheel support rod (4) are all close to the frame cross bar (1); A slider (8) is slidably connected to the frame crossbar (1), one end of each of the two connecting rods (5) is rotatably connected to the slider (8), the handlebar (2) or the front wheel support rod (3) is provided with a rear locking hook (19), and the slider (8) is provided with a rear locking groove (20); when the folding baby stroller is in a folded state, the rear locking hook (19) is connected to the rear locking groove (20).

2. The foldable baby stroller according to claim 1, characterized in that: The synchronous rotation mechanism comprises a first gear (11) fixedly connected to the lower part of the handlebar (2), and a second gear (12) fixedly connected to the upper part of the front wheel support rod (3), and the first gear (11) and the second gear (12) are meshed.

3. The foldable baby stroller according to claim 2, characterized in that: The handlebar front wheel assembly further comprises a base (10), the base (10) being pivotally connected to the front portion of the frame via a rotating shaft (15), and the first gear (11) and the second gear (12) being both rotationally connected to the base (10).

4. The foldable baby stroller according to claim 1, characterized in that: When the foldable baby stroller is in an open state, the axis center line of the handle bar (2) coincides with the axis center line of the front wheel support bar (3).

5. The foldable baby stroller according to claim 1, characterized in that: The first locking mechanism further comprises an elastic member (21) connected between the base (10) and the unlocking member (17) and applying force to the unlocking member (17) to connect the front locking hook (18) with the front locking groove (16).

6. The foldable baby stroller according to claim 1, characterized in that: When the foldable baby stroller is in a folded state, the front wheel assembly (6) is close to the rear portion of the frame cross bar (1), and the rear wheel (7) is close to the front portion of the frame cross bar (1).