A foldable stroller

Abstract

The utility model relates to the technical field of baby carriage, disclose a kind of folding children's car, with unfolding mode and folding mode, comprising: chassis group, front wheel group and rear wheel group, chassis group includes rotatably connected first frame body and second frame body, one of first frame body and second frame body is rotatably connected with front wheel group, rotatably connected with rear wheel group in the other of two;Handrail group is set in the top of chassis group, and one end of handrail group is rotatably connected with front wheel group, and the other end of handrail group is rotatably connected with rear wheel group;Chassis lock is movably set on first frame body, and when children's car is in unfolding mode, chassis lock can be locked to second frame body, so that children's car is kept in unfolded state;And after unlocking from second frame body, children's car can be switched to folding mode.The utility model has the advantages of simple operation of the children's car, small size after folding, and good structural stability after unfolding.

Description

Technical Field

[0001] This utility model relates to the field of children's vehicle technology, and in particular to a foldable children's vehicle. Background Technology

[0002] Some strollers can be pushed or pulled, making them very convenient to use. For easy carrying and storage, strollers are usually designed to be foldable, so that when not in use, they can be folded up to be compact and take up little space.

[0003] Commonly available push-pull and foldable children's strollers mainly consist of a front wheel assembly, a rear wheel assembly, a frame assembly, a handlebar assembly, and a handlebar assembly. The frame assembly is connected to the upper and lower ends of the front and rear wheel assemblies, respectively. Generally, locking mechanisms are installed on the handlebar assembly and the frame. When the stroller is unfolded, these mechanisms lock the handlebar assembly and the frame. When folding the stroller, the handlebar assembly and the frame must be unlocked before the frame can be unlocked, causing the front and rear wheel assemblies to come together, making the folding process cumbersome. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a foldable children's stroller with simple folding operation.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a foldable children's stroller, which has an unfolding mode and a folding mode, including:

[0006] The chassis assembly includes a base frame, a front wheel assembly, and a rear wheel assembly. The base frame assembly includes a first frame and a second frame that are rotatably connected. One of the first frame and the second frame is rotatably connected to the front wheel assembly, and the other of the first frame and the second frame is rotatably connected to the rear wheel assembly.

[0007] A handrail assembly is disposed above the base frame assembly, and one end of the handrail assembly is rotatably connected to the front wheel assembly, and the other end of the handrail assembly is rotatably connected to the rear wheel assembly;

[0008] The base frame lock is movably mounted on the first frame. When the stroller is in the unfolded mode, the base frame lock can lock onto the second frame to keep the stroller in the unfolded state. After the base frame lock is unlocked from the second frame, the stroller can be switched to the folded mode.

[0009] Furthermore, the second frame is provided with a first locking groove, and the base frame lock is locked into the first locking groove to lock the base frame assembly, so that the stroller remains in the unfolded mode.

[0010] Furthermore, the second frame is provided with a second locking groove. After the stroller is switched to the folding mode, the base frame lock can be locked into the second locking groove, so that the stroller remains in the folding mode.

[0011] Furthermore, the angle between the second locking groove and the first locking groove is greater than 145 degrees and less than 180 degrees.

[0012] Furthermore, the first frame is provided with two locks, and the base frame lock is provided with a third lock groove;

[0013] When the base frame lock is engaged in the first or second lock slot, the second lock can be engaged in the third lock slot, keeping the base frame lock in the locked state.

[0014] Furthermore, the two locks are retractably mounted on the first frame, and a tension spring is provided between the two locks and the first frame, the tension spring causing the two locks to tend to move in their locking direction;

[0015] Pressing the second lock will disengage it from the third lock slot, thus releasing the locking of the base frame lock.

[0016] Furthermore, it also includes a first and a second diagonal link that intersect and are hinged to each other;

[0017] The handrail assembly can be folded from both ends toward the middle, including a first handrail and a second handrail; one end of the first diagonal connecting rod is rotatably connected to the first handrail, and the other end of the first diagonal connecting rod is rotatably connected to the front wheel assembly; one end of the second diagonal connecting rod is rotatably connected to the second handrail, and the other end of the second diagonal connecting rod is rotatably connected to the rear wheel assembly.

[0018] When the stroller is switched to the folding mode, the front wheel assembly and the rear wheel assembly push the first handlebar and the second handlebar respectively through the first diagonal link and the second diagonal link, so that the handlebar assembly folds up.

[0019] Furthermore, an elastic element is provided between the base frame lock and the first frame body, and the elastic element gives the base frame lock a tendency to move in its locking direction.

[0020] Furthermore, the length of the base lock is greater than half the length of the first frame, and a hook is provided at the end of the base lock away from the second frame;

[0021] The base frame lock is retractably mounted on the first frame, and the user can pull the hook to unlock the base frame lock.

[0022] Furthermore, the rear wheel assembly is provided with a handlebar assembly, which is rotatably and adjustablely mounted on the rear wheel assembly.

[0023] Compared with the prior art, the present invention has at least the following beneficial effects:

[0024] In this invention, the base frame lock is movably mounted on the first frame. When the stroller is in the unfolded mode, the base frame lock engages with the second frame, locking the base frame assembly and keeping the stroller in the unfolded state. When the stroller needs to be folded, the user activates the base frame lock to unlock it from the second frame, allowing the stroller to be folded without unlocking the handlebar assembly. In other words, in this stroller, simply unlocking the base frame lock allows the entire stroller to be folded, making the folding operation simple.

[0025] In this invention, a first locking groove is provided on the second frame, and the base frame lock is engaged in the first locking groove to keep the stroller in the unfolded mode, ensuring the structural stability of the stroller when unfolded. A second locking groove is also provided on the second frame; when the stroller is in the folded mode, the base frame lock can be engaged in the second locking groove to keep the stroller in the folded mode, ensuring the structural stability of the stroller when folded.

[0026] In this invention, the included angle between the first locking groove and the second locking groove is greater than 145 degrees and less than 180 degrees, ensuring that the relative rotation range between the second frame and the first frame is large after the stroller is folded up, thereby ensuring that the stroller is compact after folding.

[0027] In this utility model, two locks are provided on the first frame, and a corresponding third lock groove is provided on the base frame lock. After the base frame lock is locked into the first lock groove or the second lock groove, the two locks can be locked into the third lock groove on the base frame lock to avoid the base frame lock from being mis-locked.

[0028] In this invention, a first and a second diagonal connecting rod are provided on both sides of the stroller and are intersecting and hinged. When the stroller is folded, the front wheel assembly and the rear wheel assembly can push the first and second handrails respectively through the first and second diagonal connecting rods, so that the handrail assembly is folded accordingly. The arrangement of the first and second diagonal connecting rods plays a certain role in protecting the safety of children.

[0029] In this invention, the length of the base lock is greater than half the length of the first frame. When the stroller is in the folded mode and the stroller needs to be unfolded, the operator's hand can reach into the first frame to access the base lock and unlock it from the second lock slot. Attached Figure Description

[0030] Figure 1 This is a structural diagram of the children's stroller of this utility model in its unfolded mode;

[0031] Figure 2 for Figure 1 A floor plan of a children's stroller;

[0032] Figure 3 A schematic diagram of the structure of a stroller during the folding process;

[0033] Figure 4 for Figure 3 A floor plan of a children's stroller;

[0034] Figure 5 A schematic diagram of a stroller in its folded-down mode;

[0035] Figure 6 for Figure 3 A floor plan of a children's stroller;

[0036] Figure 7 A schematic diagram showing the base frame assembly in the unfolded state when the base frame lock is engaged in the first locking groove.

[0037] Figure 8 for Figure 7 A schematic diagram showing the bottom frame lock after it has disengaged from the first lock slot and been unlocked;

[0038] Figure 9 This is a plan view of the base frame lock;

[0039] Figure 10 This is a schematic diagram of the cross-section of the end joint of the second frame.

[0040] In the picture:

[0041] 1. Base frame assembly; 11. First frame; 12. Second frame; 13. Double lock; 14. Tension spring; 15. Elastic element; 121. First lock groove; 122. Second lock groove;

[0042] 2. Front wheel assembly;

[0043] 3. Rear wheel assembly;

[0044] 4. Handrail assembly; 41. First handrail; 42. Second handrail;

[0045] 5. Base frame lock; 50. Third lock slot; 51. Hook;

[0046] 6A, First diagonal link; 6B, Second diagonal link;

[0047] 7. Handle assembly. Detailed Implementation

[0048] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0049] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0050] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0053] like Figures 1-8 As shown, this embodiment of a foldable stroller has an unfolded mode (such as...). Figure 1 and Figure 2 (as shown) and folding patterns (such as) Figure 5 and Figure 6 As shown, the stroller can be used normally when it is in unfolded mode. When the stroller is not needed, it can be switched to folded mode. Its compact size reduces the space occupied by the stroller, making it convenient to carry, store and transport.

[0054] The children's stroller in this embodiment mainly includes:

[0055] The stroller comprises a base frame assembly 1, a front wheel assembly 2, and a rear wheel assembly 3. The base frame assembly 1 includes a first frame 11 and a second frame 12 that are rotatably connected. When the stroller is in unfolded mode, the first frame 11 and the second frame 12 are flush and on the same horizontal plane. One of the first frame 11 and the second frame 12 is rotatably connected to the front wheel assembly 2, and the other of the two is rotatably connected to the rear wheel assembly 3. In this embodiment, the bottom of the front wheel assembly 2 has two front wheels, and the bottom of the rear wheel assembly 3 has two rear wheels. The two front wheels are set as omnidirectional wheels for easy steering.

[0056] Handrail assembly 4 is located above base frame assembly 1, with one end of handrail assembly 4 rotatably connected to front wheel assembly 2 and the other end of handrail assembly 4 rotatably connected to rear wheel assembly 3. Specifically, handrail assembly 4 includes a first handrail 41, a second handrail 42, and a handrail joint located between the first handrail 41 and the second handrail 42. The ends of the first handrail 41 and the second handrail 42 near the handrail joint are rotatably connected to the handrail joint. The end of the first handrail 41 away from the handrail joint is rotatably connected to the rear wheel assembly 3, and the end of the second handrail 42 away from the handrail joint is rotatably connected to the front wheel assembly 2. Handrail assembly 4 can be folded from both ends toward the middle.

[0057] The base lock 5 is movably mounted on the first frame 11. When the stroller is in the unfolded mode, the base lock 5 can lock onto the second frame 12 to keep the stroller in the unfolded state. This is equivalent to the base lock 5 locking the entire stroller frame. When the base lock 5 is unlocked from the second frame 12, the stroller can be switched to the folded mode.

[0058] In this embodiment, the rear wheel assembly 3 of the stroller is provided with a handlebar assembly 7. The handlebar assembly 7 is rotatably and adjustablely mounted on the rear wheel assembly 3. The user can adjust the rotation angle of the handlebar assembly 7 according to actual needs, and when folding the stroller, the handlebar assembly 7 can be folded onto the rear wheel assembly 3.

[0059] In practical use, in this embodiment, the base lock 5 of the stroller is movably mounted on the first frame 11. When the stroller is in unfolded mode, the base lock 5 locks onto the second frame 12, locking the base assembly 1 and keeping the stroller in the unfolded state. When the user needs to fold the stroller, the user drives the base lock 5, unlocking it from the second frame 12, allowing the stroller to be folded without unlocking the handlebar assembly 4. In other words, in this stroller, only the base lock 5 needs to be unlocked to fold the entire stroller, making the folding operation simple. By placing the unlocking action for folding on the base assembly 1 instead of the handlebar assembly 4, the risk of children misunderstanding the lock can be reduced to some extent.

[0060] like Figures 7-8 and combined Figure 2 , Figure 4 as well as Figure 6As shown, a first locking groove 121 is provided on the second frame 12. When the stroller is in the unfolded mode, the base frame lock 5 locks into the first locking groove 121, locking the base frame assembly 1 and keeping the stroller in the unfolded mode, ensuring the structural stability of the stroller when unfolded. Furthermore, an elastic element 15 is provided between the base frame lock 5 and the first frame 11. The elastic element 15 gives the base frame lock 5 a tendency to move in its locking direction. In this embodiment, the elastic element 15 is preferably a spring. The spring force acts on the base frame lock 5, giving the base frame lock 5 a tendency to move in its locking direction. In actual use, the force exerted by the spring on the base frame lock 5 can be controlled by changing the spring's position; it can be either a pushing force or a pulling force. However, the purpose is always to give the base frame lock 5 a tendency to move in its locking direction. When the stroller is in the unfolded mode, the base frame lock 5 is in a locked state, and the spring ensures reliable locking.

[0061] Furthermore, a second locking groove 122 is provided on the second frame 12. After the stroller is switched to the folding mode, the base frame lock 5 can be locked into the second locking groove 122 to keep the stroller in the folding mode, ensuring the structural stability of the stroller after folding and preventing accidental unfolding.

[0062] In actual use, a first locking groove 121 is provided on the second frame 12. The base frame lock 5 locks into the first locking groove 121 to keep the stroller in the unfolded mode and ensure the structural stability of the stroller when unfolded. A second locking groove 122 is also provided on the second frame 12. When the stroller is in the folded mode, the base frame lock 5 can lock into the second locking groove 122 to keep the stroller in the folded mode and ensure the structural stability of the stroller when folded.

[0063] Among them, such as Figures 7-10 As shown, an end joint is provided at one end of the second frame 12 near the first frame 11. The first locking groove 121 and the second locking groove 122 are both provided on the end joint. Both the first locking groove 121 and the second locking groove 122 are straight grooves. The included angle between the second locking groove 122 and the first locking groove 121 is greater than 145 degrees and less than 180 degrees, which ensures that the relative rotation range between the second frame 12 and the first frame 11 is large after the stroller is folded up, thereby ensuring that the stroller is compact after folding.

[0064] The base lock 5 is longer than half the length of the first frame 11, and a hook 51 is provided at the end of the base lock 5 away from the second frame 12. The base lock 5 is telescopically mounted on the first frame 11, and the user can pull the hook 51 to unlock the base lock 5. In actual use, the base lock 5 in this embodiment is longer than half the length of the first frame 11. When the stroller is in the folded mode and the user wants to unfold it, it ensures that the operator's hand can reach into the first frame 11 to reach the base lock 5 and unlock the base lock 5 from the second locking groove 122. If the base lock 5 is shorter, the hook 51 will be closer to the end joint of the second frame 12. When the stroller is in the folded mode, the middle parts of the first frame 11 and the second frame 12 are close together, leaving no space for the user to reach in and operate the hook 51.

[0065] To ensure that the base lock 5 can reliably extend and retract on the first frame 11, at least two long slots are provided on the base lock 5. Two rivets are used to install the base lock 5 on the first frame 11 by passing through the two long slots respectively, ensuring that the base lock 5 will not come off. The rivets can also act as guides when the base lock 5 extends and retracts.

[0066] To further ensure the locking stability of the base frame lock 5, this embodiment provides two locks 13 on the first frame 11 and a third lock groove 50 on the base frame lock 5. When the base frame lock 5 is locked into the first lock groove 121 or the second lock groove 122, the two locks 13 can be locked into the third lock groove 50, keeping the base frame lock 5 in the locked state, ensuring the structural stability of the stroller in both unfolded and folded modes.

[0067] The second lock 13 is retractably mounted on the first frame 11, and a tension spring 14 is provided between the second lock 13 and the first frame 11. The tension spring 14 causes the second lock 13 to tend to move in its locking direction. The force exerted by the tension spring 14 on the second lock 13 ensures that the second lock 13 reliably locks the base frame lock 5 when locked. After the base frame lock 5 is unlocked, if the base frame lock 5 moves to the third locking groove 50 on it and aligns with the second lock 13, the second lock 13 can automatically lock into the third locking groove 50, locking the base frame lock 5. When the second lock 13 locks the base frame lock 5, pressing the second lock 13 can disengage it from the third locking groove 50, releasing the lock on the base frame lock 5.

[0068] In actual use, this embodiment has two locks 13 on the first frame 11 and a corresponding third lock groove 50 on the base frame lock 5. After the base frame lock 5 is locked into the first lock groove 121 or the second lock groove 122, the two locks 13 can be locked into the third lock groove 50 on the base frame lock 5 to avoid the base frame lock 5 from being mis-locked.

[0069] Furthermore, such as Figures 1-6 As shown, in this embodiment, the stroller also includes a first diagonal link 6A and a second diagonal link 6B that intersect and are hinged together, with their middle portions hinged. One end of the first diagonal link 6A is rotatably connected to the first armrest 41, and the other end is rotatably connected to the front wheel assembly 2. One end of the second diagonal link 6B is rotatably connected to the second armrest 42, and the other end is rotatably connected to the rear wheel assembly 3. When the stroller is switched to folding mode, the front wheel assembly 2 and the rear wheel assembly 3 push the first armrest 41 and the second armrest 42 respectively through the first diagonal link 6A and the second diagonal link 6B, causing the armrest assembly 4 to fold, ensuring smooth folding.

[0070] During use, this embodiment has a first diagonal link 6A and a second diagonal link 6B that are intersecting and hinged on both sides of the stroller. When the stroller is folded, the front wheel assembly 2 and the rear wheel assembly 3 can push the first armrest 41 and the second armrest 42 through the first diagonal link 6A and the second diagonal link 6B, respectively, so that the armrest assembly 4 will fold accordingly. The arrangement of the first diagonal link 6A and the second diagonal link 6B plays a certain role in protecting the safety of children.

[0071] The folding principle of the stroller in this embodiment is as follows: when the stroller is in unfolded mode (e.g., Figure 1 and Figure 2 (As shown), when the stroller needs to be folded, the user presses the double lock 13 to release the lock on the base frame 5, and then pulls the hook 51 on the base frame lock 5 to disengage the base frame lock 5 from the first locking groove 121. The base frame lock 5 is unlocked, releasing the lock on the base frame, and the stroller is unlocked. Push the rear wheel assembly 3 and the front wheel assembly 2 inwards respectively, and the front wheel assembly 2 and the rear wheel assembly 3 move closer together. At the same time, the front wheel assembly 2 pushes the first handlebar 41 through the first diagonal connecting rod 6A, and the rear wheel assembly 3 pushes the second handlebar 42 through the second diagonal connecting rod 6B. The middle of the handlebar assembly 4 is pushed upwards, gradually folding until the base frame lock 5 is aligned with the second locking groove 122 on the second frame 12. Under the action of the elastic element 15, the base frame lock 5 locks into the second locking groove 122, and the third locking groove 50 on the base frame lock 5 is aligned with the double lock 13. The double lock 13 locks into the third locking groove 50, and the stroller remains in the folded mode (as shown). Figure 5 and Figure 6 (As shown).

[0072] In this design, the stroller is easy to fold, requires no frequent unlocking, is compact when folded, and has good structural stability when unfolded.

Claims

1. A foldable children's stroller, having an unfolded mode and a folded mode, characterized in that, include: The chassis assembly includes a base frame, a front wheel assembly, and a rear wheel assembly. The base frame assembly includes a first frame and a second frame that are rotatably connected. One of the first frame and the second frame is rotatably connected to the front wheel assembly, and the other of the first frame and the second frame is rotatably connected to the rear wheel assembly. A handrail assembly is disposed above the base frame assembly, and one end of the handrail assembly is rotatably connected to the front wheel assembly, and the other end of the handrail assembly is rotatably connected to the rear wheel assembly; The base frame lock is movably mounted on the first frame. When the stroller is in the unfolded mode, the base frame lock can lock onto the second frame to keep the stroller in the unfolded mode. After the base frame lock is unlocked from the second frame, the stroller can be switched to the folded mode.

2. The foldable stroller according to claim 1, characterized in that, The second frame is provided with a first locking groove. The base frame lock is locked into the first locking groove to lock the base frame assembly and keep the stroller in the unfolded mode.

3. The foldable stroller according to claim 2, characterized in that, The second frame is provided with a second locking groove. After the stroller is switched to the folding mode, the base frame lock can be locked into the second locking groove, so that the stroller remains in the folding mode.

4. The foldable stroller according to claim 3, characterized in that, The angle between the second lock groove and the first lock groove is greater than 145 degrees and less than 180 degrees.

5. The foldable stroller according to claim 3, characterized in that, The first frame is equipped with two locks, and the base frame lock is equipped with a third lock groove; When the base frame lock is engaged in the first or second lock slot, the second lock can be engaged in the third lock slot, keeping the base frame lock in the locked state.

6. The foldable stroller according to claim 5, characterized in that, The two locks are retractably mounted on the first frame, and a tension spring is provided between the two locks and the first frame. The tension spring causes the two locks to tend to move in their locking direction. Pressing the second lock will disengage it from the third lock slot, thus releasing the locking of the base frame lock.

7. The foldable stroller according to claim 1, characterized in that, It also includes a first and a second diagonal link that intersect and are hinged together; The handrail assembly can be folded from both ends toward the middle, including a first handrail and a second handrail; one end of the first diagonal connecting rod is rotatably connected to the first handrail, and the other end of the first diagonal connecting rod is rotatably connected to the front wheel assembly; one end of the second diagonal connecting rod is rotatably connected to the second handrail, and the other end of the second diagonal connecting rod is rotatably connected to the rear wheel assembly. When the stroller is switched to the folding mode, the front wheel assembly and the rear wheel assembly push the first handlebar and the second handlebar respectively through the first diagonal link and the second diagonal link, so that the handlebar assembly folds up.

8. The foldable stroller according to claim 1, characterized in that, An elastic element is provided between the base frame lock and the first frame body, and the elastic element causes the base frame lock to tend to move in its locking direction.

9. The foldable stroller according to claim 1, characterized in that, The length of the base lock is greater than half the length of the first frame, and a hook is provided at the end of the base lock away from the second frame; The base frame lock is retractably mounted on the first frame, and the user can pull the hook to unlock the base frame lock.

10. The foldable stroller according to claim 1, characterized in that, The rear wheel assembly is equipped with a handlebar assembly, which is rotatably and adjustablely mounted on the rear wheel assembly.

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