Foldable buggy frame and buggy

Abstract

The utility model relates to the technical field of buggies, and discloses a foldable buggy frame and a buggy, the foldable buggy frame comprises a front foot group, a rear foot group, an upper handle group, a lower handle group and a side supporting rod, two ends of the lower handle group are respectively and rotatably connected with the rear foot group and the upper handle group, the side supporting rod is respectively and rotatably connected with the upper handle group and the rear foot group, and the side supporting rod is connected with the rear foot group. The side supporting rods are rotationally connected with the front foot set through first connecting pieces. A four-connecting-rod mechanism is formed among the upper handle group, the lower handle group, the side supporting rods and the rear leg group; the front end of the front handrail group is rotatably connected with the lower handle group, and the rear end of the front handrail group is rotatably connected with the side supporting rod through a second connecting piece; the front end of the seat group is rotatably connected with the front foot group through a third connecting piece, the rear end of the seat group is hinged to the side supporting rods, and the hinge point is located below the second connecting piece. The baby carriage frame has the advantages that after the baby carriage frame is folded, the front handrail does not occupy extra space in the height direction, and the baby carriage frame is small in overall size and convenient to package and transport after being folded.

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 frame and a children's stroller. Background Technology

[0002] The stroller frame is designed to be foldable, allowing it to be folded up when not in use, making it convenient for users to store and transport.

[0003] Existing foldable bicycle frames mainly include modules such as: front leg assembly, rear leg assembly, handlebar assembly, seat assembly, and front grab handle assembly. The front and rear ends of the seat assembly are mounted via connecting plates, and the connecting plate between the front grab handle assembly and the rear end of the seat assembly is rotatable. When the frame is folded, the front grab handle assembly and seat assembly fold along with the handlebar assembly. After folding, because the seat assembly is close to the handlebar assembly, the space between the seat assembly and the handlebar assembly to accommodate the front grab handle assembly is limited. The front grab handle stands upright on the top of the frame, and after the frame is folded, the front grab handle takes up additional space in the height direction of the frame, resulting in a large folded size and inconvenient packaging. 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 provide a foldable children's stroller frame and stroller in which the front armrest does not occupy additional space in the height direction after folding, the overall volume is small after folding, and it is easy to pack.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a foldable children's bicycle frame, which has a folded state and an unfolded state, and can switch between the two states. Its characteristic is that it includes:

[0006] A front leg assembly and a rear leg assembly, wherein the front leg assembly and the rear leg assembly are rotatably connected;

[0007] The device comprises an upper handlebar assembly, a lower handlebar assembly, and a side support rod. The two ends of the lower handlebar assembly are rotatably connected to the rear foot assembly and the upper handlebar assembly, respectively. The side support rod is rotatably connected to the upper handlebar assembly and the rear foot assembly, and is rotatably connected to the front foot assembly via a first connector. The upper handlebar assembly, lower handlebar assembly, side support rod, and rear foot assembly form a four-bar linkage.

[0008] The front armrest assembly is rotatably connected to the lower handle assembly at its front end, and rotatably connected to the side support rod at its rear end via a second connector.

[0009] The seat assembly has its front end rotatably connected to the front leg assembly via a third connector, and its rear end is hinged to the side support rod, with the hinge point located below the second connector.

[0010] Furthermore, a locking member is movably provided between the upper handlebar assembly and the lower handlebar assembly, and the locking member can lock the upper handlebar assembly onto the lower handlebar assembly;

[0011] After the locking device is unlocked, the upper handlebar assembly can be folded towards the lower handlebar assembly, which in turn causes the front armrest assembly, the seat assembly, and the front foot assembly to fold.

[0012] Furthermore, after the stroller frame is switched to the folded state, a gap is formed between the seat assembly and the upper handlebar assembly, and the front armrest assembly is located in the gap.

[0013] Furthermore, the rear foot assembly is provided with a rear foot joint at one end near the front foot assembly, and both the lower handle assembly and the front foot assembly are rotatably connected to the rear foot joint;

[0014] When the stroller frame is switched to the folded state, the top height of the rear leg joint and the top height of the upper handlebar assembly are both higher than the top height of the front armrest.

[0015] Furthermore, the locking element is configured as a locking gear, and the upper handlebar assembly is provided with a drive turntable that moves against it. The drive turntable can drive the locking gear to move towards the lower handlebar assembly to unlock the upper handlebar assembly.

[0016] The upper handlebar assembly is equipped with an unlocking component, which is connected to the drive turntable via a pull cable. The unlocking component drives the drive turntable via the pull cable.

[0017] A spring is provided between the locking gear and the lower handle assembly. One end of the spring abuts against the locking gear, and the other end of the spring abuts against the lower handle assembly. The elastic force of the spring causes the locking gear to tend to move in its locking direction.

[0018] Furthermore, the upper handlebar assembly has several inclined blocks protruding towards the drive turntable. When the drive turntable rotates and abuts against the inclined blocks, it can drive the drive turntable to move closer to the locking gear.

[0019] Furthermore, both ends of the first connector are rotatably connected to the front foot assembly and the side support rod, respectively;

[0020] The two ends of the second connector are rotatably connected to the front armrest and the side support rod, respectively;

[0021] The two ends of the third connector are rotatably connected to the front foot assembly and the seat assembly, respectively.

[0022] Furthermore, the side strut, the rear leg assembly, the first connector, and the front leg assembly form a four-bar linkage.

[0023] Furthermore, the front end of the seat assembly is provided with a leg rest, which is rotatably mounted on the seat assembly.

[0024] This utility model also proposes a children's stroller, which includes the above-mentioned foldable stroller frame.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] In this invention, the front end of the front armrest assembly is rotatably connected to the lower handlebar assembly, and the rear end is rotatably connected to the side support rod via a second connector; the front end of the seat assembly is rotatably connected to the front foot assembly via a third connector, and the rear end of the seat assembly is directly hinged to the side support rod, with the hinge point located below the second connector. When the children's bicycle frame is folded, sufficient space is ensured between the upper handlebar assembly and the seat assembly to accommodate the front armrest assembly, and the front armrest assembly will not protrude from the top of the frame, making it convenient for packaging, and the frame is compact when folded.

[0027] In this invention, after the frame is folded, a gap is formed between the upper handlebar assembly and the seat assembly, and the front armrest assembly is accommodated in this gap. The top height of the front armrest assembly is lower than the top height of both the rear foot joint and the upper handlebar assembly, ensuring that the seat assembly does not protrude outward after being folded.

[0028] In this invention, the seat assembly and the front armrest assembly are not directly connected; the rear end of the seat assembly is directly hinged to the side support rod, resulting in better stability during use. The upper and lower handlebar assemblies are locked together by a locking mechanism. Once the locking mechanism is unlocked, the frame can be folded down with a single click, making operation convenient. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the children's bicycle frame of this utility model when it is in the unfolded state;

[0030] Figure 2 This is an exploded view of the locking mechanism between the upper and lower handlebars.

[0031] Figure 3 A schematic diagram of two four-bar linkages formed on the frame of a children's bicycle;

[0032] Figure 4 A structural diagram illustrating the folding process of a children's bicycle frame;

[0033] Figure 5 for Figure 4 A schematic diagram showing the structure of a children's bicycle frame when it is further folded down until the folding is complete;

[0034] Figure 6 This is a schematic diagram of the folding process of the front armrest assembly and seat assembly within the frame.

[0035] In the picture:

[0036] 1. Forefoot group;

[0037] 2. Rear foot group; 20. Rear foot joint;

[0038] 3. Handlebar assembly; 30. Locking mechanism; 31. Drive dial; 32. Unlocking mechanism; 33. Pull cable; 34. Spring; 35. Angled block; 370. Clearance;

[0039] 4. Start with the assembly;

[0040] 5. Side strut; 51. First connector;

[0041] 6. Front armrest assembly; 61. Second connecting piece;

[0042] 7. Seat assembly; 70. Leg rest; 71. Third connector. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] like Figures 1-6 As shown, the foldable stroller frame of this embodiment can be applied to a stroller, and the stroller frame has a folded state (e.g., Figure 5 (as shown) and unfolded state (as shown) Figure 1 and Figure 3 As shown), the frame can switch between two states: when needed, the frame is switched to the unfolded state, and when not needed, the frame is switched to the folded state.

[0049] The children's bicycle frame of this embodiment mainly includes: a front leg assembly 1, a rear leg assembly 2, an upper handlebar assembly 3, a lower handlebar assembly 4, side support rods 5, a front armrest assembly 6, and a seat assembly 7. The front leg assembly 1 and the rear leg assembly 2 are rotatably connected. The front leg assembly 1 can be rotated and folded towards the rear leg assembly 2. The bottom of the front leg assembly 1 has two front wheels, which are swivel wheels for easy steering. The rear leg assembly 2 has two rear wheels. The two ends of the lower handlebar assembly 4 are rotatably connected to the rear leg assembly 2 and the upper handlebar assembly 3, respectively; that is, the upper end of the lower handlebar assembly 4 is rotatably connected to the upper handlebar assembly 3, and the lower end of the lower handlebar assembly 4 is rotatably connected to the rear leg assembly 2. The side support rods 5 are rotatably connected to the upper handlebar assembly 3 and the rear leg assembly 2, and the side support rods 5 are rotatably connected to the front leg assembly 1 via a first connecting member 51. One side support rod 5 is provided on each of the left and right sides of the frame. Furthermore, the upper handlebar assembly 3, lower handlebar assembly 4, side support rod 5, and rear leg assembly 2 form a four-bar linkage mechanism. When the upper handlebar assembly 3 is folded, it can drive the other three to move. The front end of the front armrest assembly 6 is rotatably connected to the lower handlebar assembly 4, and the rear end of the front armrest assembly 6 is rotatably connected to the side support rod 5 via the second connector 61. The front end of the seat assembly 7 is rotatably connected to the front leg assembly 1 via the third connector 71, and the rear end of the seat assembly 7 is hinged to the side support rod 5, with the hinge point located below the second connector 61.

[0050] In practical use, the front end of the front armrest assembly 6 in this embodiment is rotatably connected to the lower handlebar assembly 4, and the rear end is rotatably connected to the side support rod 5 via the second connector 61. The front end of the seat assembly 7 is rotatably connected to the front foot assembly 1 via the third connector 71, and the rear end of the seat assembly 7 is directly hinged to the side support rod 5, with the hinge point located below the second connector 61. When the stroller frame is folded, sufficient space is ensured between the upper handlebar assembly 3 and the seat assembly 7 to accommodate the front armrest assembly 6, preventing the front armrest assembly 6 from protruding from the top of the frame, facilitating packaging, and resulting in a compact size when the frame is folded. Furthermore, the seat assembly 7 is not directly connected to the front armrest assembly 6; the rear end of the seat assembly 7 is directly hinged to the side support rod 5, providing better stability during use.

[0051] like Figure 1 and Figure 3 As shown, the first connecting piece 51, the second connecting piece 61, and the third connecting piece 71 are all configured as connecting iron plates. The two ends of the first connecting piece 51 are rotatably connected to the front leg assembly 1 and the side support rod 5, respectively. The two ends of the second connecting piece 61 are rotatably connected to the front armrest and the side support rod 5, respectively. The two ends of the third connecting piece 71 are rotatably connected to the front leg assembly 1 and the seat assembly 7, respectively. A four-bar linkage is also formed between the side support rod 5, the rear leg assembly 2, the first connecting piece 51, and the front leg assembly 1 to ensure coordinated folding and unfolding of the various modules when the stroller frame is folded and unfolded. In this embodiment, the upper handlebar assembly 3, the lower handlebar assembly 4, the side support rod 5, and the rear leg assembly 2 form a four-bar linkage mechanism, and the side support rod 5, the rear leg assembly 2, the first connecting member 51, and the front leg assembly 1 also form a four-bar linkage mechanism. When the upper handlebar assembly 3 rotates and folds, it can drive the lower handlebar assembly 4, the side support rod 5, the front leg assembly 1, and the first connecting member 51, and the front armrest assembly 6 and the seat assembly 7 also fold down accordingly.

[0052] Specifically, such as Figures 4-6As shown, in this embodiment, after the stroller frame is switched to the folded state, a gap 370 is formed between the seat assembly 7 and the upper handlebar assembly 3, and the front armrest assembly 6 is located within the gap 370. There is sufficient space between the seat assembly 7 and the upper handlebar assembly 3 to accommodate the front armrest assembly 6. The rear leg assembly 2 is equipped with a rear leg joint 20 at the end near the front leg assembly 1. For ease of manufacturing, the rear leg joint 20 can be separately configured from the main body of the rear leg assembly 2. For easy connection, a connecting part extends from the rear leg joint 20 in three different directions. One connecting part is fixedly connected to the main body of the rear leg assembly 2, and the other two connecting parts are rotatably connected to the lower handlebar assembly 4 and the front leg assembly 1, respectively. That is, both the lower handlebar assembly 4 and the front leg assembly 1 are rotatably connected to the rear leg joint 20. When the stroller frame is switched to the folded state, the top height of the rear leg joint 20 and the top height of the upper handlebar assembly 3 are higher than the top height of the front armrest, ensuring that the seat assembly 7 does not protrude from the top of the frame when the stroller frame is folded. Furthermore, a leg rest 70 is provided at the front end of the seat assembly 7. The leg rest 70 is rotatably mounted on the seat assembly 7, and the tilt angle of the leg rest 70 relative to the seat can be adjusted to ensure the comfort of the child. In addition, when the stroller frame is folded up, the leg rest 70 can also be easily rotated and folded onto the seat assembly 7 after the seat is folded up.

[0053] In this embodiment of the children's bicycle frame, after the frame is folded, a gap 370 is formed between the upper handlebar assembly 3 and the seat assembly 7. The front armrest assembly 6 is accommodated in the gap 370, and the top height of the front armrest assembly 6 is lower than the top height of both the rear foot joint 20 and the upper handlebar assembly 3, ensuring that the seat assembly 7 does not protrude outward after being folded.

[0054] like Figure 2 and combined Figure 1 As shown, a locking member 30 is movably provided between the upper handlebar assembly 3 and the lower handlebar assembly 4. The locking member 30 can lock the upper handlebar assembly 3 onto the lower handlebar assembly 4. When the upper handlebar assembly 3 unfolds from the lower handlebar assembly 4 and the two are roughly on the same straight line, it is in the unfolded position. The locking member 30 can lock the upper handlebar assembly 3 onto the lower handlebar assembly 4, keeping the upper handlebar assembly 3 in the unfolded position. When the locking member 30 is unlocked, the upper handlebar assembly 3 can rotate and fold towards the lower handlebar assembly 4, which in turn causes the front armrest assembly 6, seat assembly 7, and front foot assembly 1 to fold.

[0055] The locking element 30 is configured as a locking gear, and the upper handlebar assembly 3 is provided with a drive turntable 31 that moves against it. When the drive turntable 31 moves towards the locking gear, it drives the locking gear to move towards the lower handlebar assembly 4, unlocking the upper handlebar assembly 3. After unlocking, the upper handlebar assembly 3 can be rotated and folded. The upper handlebar assembly 3 is provided with an unlocking element 32, which in this embodiment is configured as an unlocking button. The unlocking action is performed by pressing the unlocking button. The unlocking component 32 and the drive turntable 31 are connected by a pull cable 33. One end of the pull cable 33 is connected to the unlocking component 32, and the other end is connected to the drive turntable 31. The unlocking component 32 drives the drive turntable 31 through the pull cable 33. Several inclined blocks 35 protrude from the upper handlebar assembly 3 toward the drive turntable 31. When the unlocking component 32 is pressed, the unlocking component 32 pulls the drive turntable 31 through the pull cable 33. The drive turntable 31 rotates and abuts against the inclined blocks 35. Under the action of the inclined blocks 35, the drive turntable 31 is driven to move toward the side closer to the locking gear. That is, the drive turntable 31 undergoes radial movement and moves toward the side closer to the locking gear, so that the locking gear disengages from the upper handlebar assembly 3 and is unlocked.

[0056] In this embodiment, the upper handlebar assembly 3 and the lower handlebar assembly 4 are locked together by a locking member 30. When the locking member 30 is unlocked, the frame can be folded with one click, which is convenient to operate.

[0057] Furthermore, a spring 34 is provided between the locking gear and the lower handle assembly 4. One end of the spring 34 abuts against the locking gear, and the other end of the spring 34 abuts against the lower handle assembly 4. The elastic force of the spring 34 causes the locking gear to tend to move in its locking direction. The setting of the spring 34 can ensure that the locking gear is locked reliably, and after unlocking, it is convenient to restore the locking gear to the locked position.

[0058] like Figures 1-2 as well as Figures 4-6 As shown, in actual use, when it is necessary to switch the stroller frame from the unfolded state to the folded state, first press the unlocking piece 32. The unlocking piece 32 pulls the drive turntable 31 through the pull cable 33. The drive turntable 31 abuts against the inclined block 35 and moves towards the locking piece 30, pushing the locking piece 30 to unlock it and disengage it from the upper handlebar assembly 3. Rotate the upper handlebar assembly 3 counterclockwise, which will drive the lower handlebar assembly 4 to move clockwise, the side support bar 5 to move clockwise, the front foot assembly 1 to move counterclockwise, the front armrest assembly 6 to move clockwise, and the seat assembly 7 to move clockwise until the stroller frame is completely folded.

[0059] In this design, the front handlebars do not take up extra space in the height direction when the stroller frame is folded up, and the overall size is compact when folded up, making it convenient for packaging and transportation.

Claims

1. A foldable children's bicycle frame, having a folded state and an unfolded state, and being able to switch between the two states, characterized in that, include: A front leg assembly and a rear leg assembly, wherein the front leg assembly and the rear leg assembly are rotatably connected; The device comprises an upper handlebar assembly, a lower handlebar assembly, and a side support rod. The two ends of the lower handlebar assembly are rotatably connected to the rear foot assembly and the upper handlebar assembly, respectively. The side support rod is rotatably connected to the upper handlebar assembly and the rear foot assembly, and is rotatably connected to the front foot assembly via a first connector. The upper handlebar assembly, lower handlebar assembly, side support rod, and rear foot assembly form a four-bar linkage. The front armrest assembly is rotatably connected to the lower handle assembly at its front end, and rotatably connected to the side support rod at its rear end via a second connector. The seat assembly has its front end rotatably connected to the front leg assembly via a third connector, and its rear end is hinged to the side support rod, with the hinge point located below the second connector.

2. The foldable children's bicycle frame according to claim 1, characterized in that, A locking element is provided between the upper handlebar assembly and the lower handlebar assembly, and the locking element can lock the upper handlebar assembly onto the lower handlebar assembly; After the locking device is unlocked, the upper handlebar assembly can be folded towards the lower handlebar assembly, which in turn causes the front armrest assembly, the seat assembly, and the front foot assembly to fold.

3. The foldable children's bicycle frame according to claim 1 or 2, characterized in that, When the stroller frame is switched to the folded state, a gap is formed between the seat assembly and the upper handlebar assembly, and the front armrest assembly is located in the gap.

4. The foldable children's bicycle frame according to claim 3, characterized in that, The rear foot assembly is provided with a rear foot joint at one end near the front foot assembly, and both the lower handle assembly and the front foot assembly are rotatably connected to the rear foot joint; When the stroller frame is switched to the folded state, the top height of the rear leg joint and the top height of the upper handlebar assembly are both higher than the top height of the front armrest.

5. The foldable children's bicycle frame according to claim 2, characterized in that, The locking element is configured as a locking gear, and the upper handlebar assembly is provided with a drive turntable that moves against it. The drive turntable can drive the locking gear to move towards the lower handlebar assembly to unlock the upper handlebar assembly. The upper handlebar assembly is equipped with an unlocking component, which is connected to the drive turntable via a pull cable. The unlocking component drives the drive turntable via the pull cable. A spring is provided between the locking gear and the lower handle assembly. One end of the spring abuts against the locking gear, and the other end of the spring abuts against the lower handle assembly. The elastic force of the spring causes the locking gear to tend to move in its locking direction.

6. The foldable children's bicycle frame according to claim 5, characterized in that, The upper handlebar assembly has several inclined blocks protruding towards the drive turntable. When the drive turntable rotates and abuts against the inclined blocks, it can drive the drive turntable to move closer to the locking gear.

7. The foldable children's bicycle frame according to claim 1, characterized in that, The two ends of the first connector are rotatably connected to the front foot assembly and the side support rod, respectively; The two ends of the second connector are rotatably connected to the front armrest and the side support rod, respectively; The two ends of the third connector are rotatably connected to the front foot assembly and the seat assembly, respectively.

8. The foldable children's bicycle frame according to claim 1 or 7, characterized in that, The side support rod, the rear leg assembly, the first connector, and the front leg assembly form a four-bar linkage.

9. The foldable children's bicycle frame according to claim 1, characterized in that, The front end of the seat assembly is provided with a leg rest, which is rotatably mounted on the seat assembly.

10. A child stroller, characterized in that, Including the foldable children's bicycle frame as described in any one of claims 1-9.

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