Folding baby stroller

Abstract

The invention discloses a folding baby carriage, comprising a frame cross bar, a handle bar whose lower part is rotatable relative to the front of the frame cross bar, a front fork bar whose upper part is rotatable relative to the front of the frame cross bar, two rear wheel support bars whose upper parts are rotatably connected to the rear of the frame cross bar and are respectively located on the left and right sides of the frame cross bar, 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 rotatably connected to the rear wheel support bars on the same side, and the folding baby carriage has an open state and a folding state, and when it is in the folding state, the handle bar, the front fork bar, the connecting rod, and the rear wheel support bar are all close to the frame cross bar. After folding, all parts of the folding baby carriage are folded together, the handle and the front wheel are respectively folded to the upper and lower sides of the frame cross bar through the rotation of the handle bar and the front fork bar, and the two rear wheels are folded to the left and right sides of the frame cross bar, and the whole vehicle has a small volume after folding, does not occupy space, and is easy to carry.

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 carriage.

[0004] In order to achieve the above objectives, the technical solution adopted by the present invention is: a foldable baby stroller, comprising a frame cross bar, a handle bar with a lower portion that can be rotated relative to the front of the frame cross bar, a front fork bar with an upper portion that can be rotated relative to the front of the frame cross bar, two rear wheel support bars whose upper portions are rotatably connected to the rear of the frame cross bar and are respectively located on the left and right sides of the frame cross bar, two connecting rods at one end of which are 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 rotatably connected to the rear wheel support bars on the same side, the bottom of the front fork bar is connected to the front wheel assembly, and the bottoms of the two rear wheel support bars are respectively connected to the rear wheels. The foldable baby stroller has an open state and a folded state. When it is in the folded state, the handle bar, the front fork bar, the connecting rod, and the rear wheel support bars are all close to the frame cross bar.

[0005] Furthermore, when the foldable baby carriage is in the folded state, the front wheel assembly moves toward the rear of the frame cross bar, and the rear wheel moves toward the front of the frame cross bar.

[0006] Furthermore, a slider is slidably connected to the frame crossbar, and one end of the two connecting rods is rotatably connected to the slider.

[0007] Furthermore, the front wheel assembly is pivotally connected to the front fork rod, and when the foldable baby carriage is in a folded state, the side surface of the front wheel in the front wheel assembly faces the frame cross bar.

[0008] Furthermore, a first gear is fixedly connected to the lower portion of the handlebar, a second gear is fixedly connected to the upper portion of the front fork, the first gear and the second gear are both rotatably arranged relative to the frame crossbar, and the first gear and the second gear are meshed.

[0009] Furthermore, the front portion of the frame crossbar is pivotally connected to the base via a rotating shaft, and the handlebar rod and the front fork rod are both rotatably connected to the base.

[0010] Furthermore, a first locking mechanism is provided between the handle bar, the front fork bar and the base for locking the relative positions of the three when the foldable baby carriage is in an opened state.

[0011] Optionally, the first locking mechanism includes a clamping block connected to the handlebar rod and the front fork rod respectively, and a locking member rotatably connected to the base and connected to and separated from the clamping block by its own rotation.

[0012] Optionally, the first locking mechanism includes an unlocking button which is movably connected to the base and is operated to unlock the first locking mechanism.

[0013] Furthermore, a second locking mechanism is provided between the slide block and the frame crossbar for locking the relative positions of the two when the foldable baby carriage is in an open state.

[0014] Furthermore, the handle bar is provided with a lock hook, and the slide block is provided with a lock slot. When the foldable baby stroller is in a folded state, the lock hook is connected to the lock slot to keep the foldable baby stroller in the folded state.

[0015] Furthermore, when the foldable baby carriage is in the open state, the axis center line of the handle rod coincides with the axis center line of the front fork rod.

[0016] Due to the adoption of the above technical solution, the foldable baby carriage has all parts that are folded together after folding, the handlebars and the front wheels are folded to the upper and lower sides of the frame crossbar respectively by rotating the handlebar rod and the front fork rod, and the two rear wheels are folded to the left and right sides of the frame crossbar. The whole carriage has a small volume after folding, does not occupy space, and is easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 This is a schematic structural diagram of a foldable baby stroller in an open state in Embodiment 1 of the present invention;

[0018] Attached Figure 2 For attachment Figure 1 A structural diagram of a partial view A;

[0019] Attached Figure 3 For attachment Figure 1 The structural schematic diagram of the foldable baby carriage shown is in the folded state;

[0020] Attached Figure 4 It is a schematic side view of the structure of the foldable baby carriage in the second embodiment of the present invention in the open state;

[0021] Attached Figure 5 For attachment Figure 4 A rear view structural diagram of ;

[0022] Attached Figure 6 For attachment Figure 4 A schematic diagram of a top view structure;

[0023] Attached Figure 7 For attachment Figure 4 The side view of the foldable baby carriage in the folded state is shown;

[0024] Attached Figure 8 For attachment Figure 7 A rear view structural diagram of ;

[0025] Attached Fig. 9 For attachment Figure 7 A schematic diagram of a top view structure;

[0026] Attached Fig.10 For attachment Figure 4 The three-dimensional structural schematic diagram of the foldable baby carriage in the open state is shown;

[0027] Attached Fig.11 For attachment Fig.10 A schematic diagram of the three-dimensional structure of the mid-folding baby stroller during the folding process;

[0028] Attached Fig.12 For attachment Fig.10 Schematic diagram of the three-dimensional structure of the foldable baby carriage in the folded state.

[0029] The numbers in the figure are:

[0030] 1. Frame crossbar; 2. Handlebar; 3. Front fork 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. Block; 17. Lock; 18. Unlock button; 19. Lock hook; 20. Buckle. DETAILED DESCRIPTION

[0031] 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.

[0032] Embodiment 1

[0033] From the attached Figure 1 To Attachment Figure 3As can be seen from the structural diagram, the folding baby carriage in this embodiment includes a frame cross bar 1, a handle bar 2 rotatable at the bottom relative to the front of the frame cross bar 1, a front fork bar 3 rotatable at the top relative to the front of the frame cross bar 1, two rear wheel support bars 4 rotatably connected to the rear of the frame cross bar 1 and located on the left and right sides of the frame cross bar 1, two connecting rods 5 rotatably and slidably connected to the frame cross bar 1 at one end and located on the left and right sides of the frame cross bar 1, the other ends of the two connecting rods 5 are rotatably connected to the rear wheel support bars 4 on the same side, the bottom of the front fork bar 3 is connected to a front wheel assembly 6, and the bottoms of the two rear wheel support bars 4 are respectively connected to rear wheels 7. A handle 9 is connected to the top of the handle bar 2. The folding baby stroller has an open state and a folded state. When the folding baby stroller is in the open state, the handle bar 2, the front fork bar 3, the connecting rod 5, and the rear wheel support rod 4 are all unfolded relative to the frame cross bar 1, and preferably, the axis line of the handle bar 2 coincides with the axis line of the front fork bar 3. When the folding baby stroller is in the folded state, the handle bar 2, the front fork bar 3, the connecting rod 5, and the rear wheel support rod 4 are all close to the frame cross bar 1, and preferably, the front wheel assembly 6 is close to the rear part of the frame cross bar 1, and the rear wheel 7 is close to the front part of the frame cross bar 1.

[0034] Specifically, a slider 8 is slidably connected to the frame crossbar 1 , and one end of the two connecting rods 5 is rotatably connected to the slider 8 .

[0035] In a more preferred embodiment, the lower part of the handle bar 2 is fixedly connected with a first gear 11, the upper part of the front fork bar 3 is fixedly connected with a second gear 12, the first gear 11 and the second gear 12 are both rotatably connected with the frame cross bar 1, and the first gear 11 and the second gear 12 are meshed. Therefore, when the baby carriage is folded, only one of the handle bar 2 and the front fork bar 3 needs to be rotated, and the other can be rotated in conjunction with it, and after the baby carriage is folded, only one of the handle bar 2 and the front fork bar 3 needs to be locked with the frame cross bar 1, and the position of the other is also locked.

[0036] This embodiment provides a locking structure, which can lock one of the handlebar 2 and the front fork bar 3 with the position of the frame crossbar 1 after the baby stroller is folded. Specifically, the handlebar 2 or the front fork bar 3 has a locking hook 19, and in this embodiment, the locking hook 19 is arranged on the handlebar 2, and the slider 8 has a locking groove (not shown in the drawings). When the foldable baby stroller is in the folded state, the locking hook 19 is connected to the locking groove, and this structure locks the position of the handlebar 2 and the front fork bar 3, and also locks the position of the rear wheel support rod 4 and the connecting rod 5, so that the foldable baby stroller as a whole remains in the folded state.

[0037] The front part of the frame cross bar 1 has a base 10, which is pivotally connected to the frame cross bar 1 through a rotating shaft 15, and the handlebar 2 and the front fork rod 3 are both rotatably connected to the base 10. The first gear 11 and the second gear 12 mentioned above are both rotatably connected inside the base 10. Preferably, the axis of the rotating shaft 15 coincides with the axis of the handlebar 2 and the axis of the front fork rod 3.

[0038] A first locking mechanism is provided between the handle bar 2, the front fork bar 3 and the base 10 to lock the relative positions of the three when the foldable baby stroller is in the open state. In this embodiment, a specific structure of the first locking mechanism is provided, including a clamping block 16 connected to the handle bar 2 and the front fork bar 3 respectively, and a locking member 17 which is rotatably connected to the base 10 and can be connected to and separated from the clamping block 16. The locking member 17 has a buckle 20. When the first locking mechanism is locked, the buckle 20 hooks the clamping block 16. When the operation is unlocked, the buckle 20 is separated from the clamping block 16 by rotating the locking member 17.

[0039] In this embodiment, the lower part of the handlebar 2 has a first joint 13, and the first joint 13 is rotatably connected to the base 10, and the upper part of the front fork rod 3 has a second joint 14, and the second joint 14 is rotatably connected to the base 10. The above-mentioned block 16 is respectively arranged on the first joint 13 and the second joint 14, and the above-mentioned first gear 11 and the second gear 12 are respectively connected to the first joint 13 and the second joint 14.

[0040] 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 folding baby carriage 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.

[0041] Working principle:

[0042] When the baby carriage is folded, after unlocking the first locking mechanism and the second locking mechanism, the handlebar 2 and the front fork 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 lock hook 19 on the handlebar 2 is connected to the lock groove on the slider 8 to keep the baby carriage in the folded state.

[0043] Embodiment 2

[0044] Reference Figure 4 To Attachment Fig.12 The folding baby stroller in this embodiment is different from the first embodiment in that the front wheel assembly 6 is pivotally connected to the front fork rod 3, and when the folding baby stroller is in the folded state, the side surface of the front wheel in the front wheel assembly 6 faces the frame cross bar 1.

[0045] In addition, the first locking mechanism in this embodiment is different from the structure in Example 1. The first locking mechanism in this embodiment includes an unlocking button 18 that is movably connected to the base 10 and can be unlocked by operating the unlocking button 18. The specific structure of the first locking mechanism is not the focus of the invention, so it will not be elaborated.

[0046] In this embodiment, when the baby carriage is folded, the front wheel assembly 6 is rotated 90° relative to the front fork rod 3 so that the side of the front wheel faces the frame cross bar 1. The remaining folding steps are basically the same as those in the first embodiment.

[0047] The foldable baby stroller in the above embodiment has all parts folded together after folding, the handle and the front wheel are folded to the upper and lower sides of the frame cross bar respectively by rotating the handle bar and the front fork rod, and the two rear wheels are folded to the left and right sides of the frame cross bar. The whole stroller has a small volume after folding, does not take up space, and is easy to carry.

[0048] 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, characterized in that: The foldable baby carriage comprises a frame cross bar (1), a handle bar (2) whose lower part is rotatable relative to the front part of the frame cross bar (1), a front fork bar (3) whose upper part is rotatable relative to the front part of the frame cross bar (1), two rear wheel support bars (4) whose upper parts are rotatably connected to the rear part of the frame cross bar (1) and are respectively located on the left and right sides of the frame cross bar (1), two connecting rods (5) whose one end is rotatably and slidably connected to the frame cross bar (1) and are 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 bars (4) on the same side, the bottom of the front fork bar (3) is connected to a front wheel assembly (6), and the bottoms of the two rear wheel support bars (4) are respectively connected to rear wheels (7), and the foldable baby carriage has an open state and a folded state. When it is in the folded state, the handle bar (2), the front fork bar (3), the connecting rod (5) and the rear wheel support bars (4) are all close to the frame cross bar (1); The front part of the frame crossbar (1) has a base (10), the base (10) is pivotally connected to the frame crossbar (1) via a rotating shaft (15), and the handlebar (2) and the front fork rod (3) are both rotatably connected to the base (10); a first locking mechanism is provided between the handlebar (2), the front fork rod (3) and the base (10) for locking the relative positions of the three when the foldable baby carriage is in an open state; the first locking mechanism comprises a clamping block (16) respectively connected to the handlebar (2) and the front fork rod (3), and a locking member (17) rotatably connected to the base (10) and connected to and separated from the clamping block (16) by its own rotation; A slider (8) is slidably connected to the frame crossbar (1), and one end of each of the two connecting rods (5) is rotatably connected to the slider (8); a second locking mechanism is provided between the slider (8) and the frame crossbar (1) for locking the relative position of the two when the folding baby carriage is in an open state; a locking hook (19) is provided on the handlebar (2), and a locking groove is provided on the slider (8); when the folding baby carriage is in a folded state, the locking hook (19) is connected to the locking groove to keep the folding baby carriage in the folded state.

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

3. The foldable baby stroller according to claim 1, characterized in that: The front wheel assembly (6) is pivotally connected to the front fork rod (3); when the foldable baby carriage is in a folded state, the side surface of the front wheel in the front wheel assembly (6) faces the frame cross bar (1).

4. The foldable baby stroller according to claim 1, characterized in that: The lower part of the handlebar (2) is fixedly connected to a first gear (11), the upper part of the front fork rod (3) is fixedly connected to a second gear (12), the first gear (11) and the second gear (12) are both rotatably arranged relative to the frame crossbar (1), and the first gear (11) and the second gear (12) are meshed.

5. The foldable baby stroller according to claim 1, characterized in that: The first locking mechanism comprises an unlocking button (18) which is movably connected to the base (10) and is operated to unlock the first locking mechanism.

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

Images