Baby carriage capable of crossing steps

Abstract

The utility model relates to the technical field of baby carriages, and discloses a baby carriage capable of crossing steps. Comprising a frame assembly, a front wheel assembly, a triangular wheel assembly, a locking unit and a damping assembly. Firstly, the triangular wheel assembly is adopted on the baby carriage, so that the baby carriage has the capability of crossing steps, and the trafficability of the baby carriage is improved. In addition, the state between the frame assembly and the triangular wheel assembly is adjusted through the locking unit; when the baby carriage passes through the steps, the triangular wheel assembly is adjusted to be in a rotating state, so that the distance between the contact point of the triangular wheel assembly and the ground and the child riding area in the frame assembly is reduced, the overall gravity center of the baby carriage or the baby carriage and a child is reduced, and the stability and safety of the baby carriage when the baby carriage passes through the steps are improved. And finally, when the triangular wheel assembly crosses the steps in the rotating state process, the triangular wheel assembly acts on the vibration reduction assembly to reduce the bumping feeling caused by step crossing, so that the riding comfort of the child is improved, and the vibration amplitude transmitted to the dragging handle is reduced.

Description

Technical Field

[0001] This utility model relates to the field of children's vehicle technology, specifically to a children's vehicle that can cross steps. Background Technology

[0002] Strollers are an essential product for almost every household. However, currently available strollers can only be pushed and used on flat surfaces. When encountering steps or stairs, mothers (or caregivers) need to lift the child out of the stroller, fold it up, then carry the child in one arm and the stroller in the other to go over the steps (or stairs) before putting the child back in. This is time-consuming, laborious, and extremely inconvenient. Utility Model Content

[0003] To address the aforementioned shortcomings of existing technologies, a children's stroller capable of traversing steps is provided by incorporating triangular wheels, thus enabling the stroller to climb stairs.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0005] A children's stroller that can cross steps is characterized by comprising: a frame assembly, a front wheel assembly fixedly mounted on the front side of the bottom of the frame assembly, a triangular wheel assembly rotatably mounted on the rear side of the bottom of the frame assembly, a locking unit for locking the triangular wheel assembly, and a shock-absorbing assembly disposed on the frame assembly; the locking unit is connected between the frame assembly and the triangular wheel assembly, and under the action of the locking unit, the triangular wheel assembly has two states: rotating around the frame assembly and being locked and fixed to the frame assembly, and the triangular wheel assembly can only rotate in the direction of the front wheel assembly; the shock-absorbing assembly is located on the frame assembly between the triangular wheel assembly and the front wheel assembly, and is located within the rotation trajectory range of the triangular wheel assembly.

[0006] According to the above technical solution, the triangular wheel assembly includes an L-shaped mounting bracket and a triangular wheel; the top of the vertical section of the L-shaped mounting bracket is rotatably connected to the rear support of the frame assembly via a first pivot, and the horizontal section of the L-shaped mounting bracket faces the rear of the stroller; the triangular wheel is connected to the end of the horizontal section of the L-shaped mounting bracket via a second pivot.

[0007] The vertical section of the L-shaped mounting bracket adopts a cylindrical structure, and the rear support seat is provided with a connecting section that matches the L-shaped mounting bracket. The connecting section adopts a semi-cylindrical structure that matches the cylindrical structure of the L-shaped mounting bracket. The L-shaped mounting bracket is hinged to the connecting section through a first pivot, and the dimensions of the L-shaped mounting bracket at the hinge point must meet its own rotation requirements.

[0008] According to the above technical solution, the locking unit includes a locking plate, a fourth rotating shaft, a tension spring, and a pedal. An opening is provided on the cylindrical structure, located below the connecting section and facing the rear of the stroller. A through hole for the fourth rotating shaft to pass through is provided on the cylindrical structure at the opening. The fourth rotating shaft is rotatably connected within the through hole. Both the locking plate and the pedal are fixed to the rotating shaft and extend out of the opening. The locking plate is inclined upwards, and the pedal is inclined downwards. An L-shaped notch is provided on the locking plate. A tension spring in a stretched state connects the locking plate and the tubular structure. Under the action of the spring, the L-shaped notch of the locking plate fits against the bottom and side surfaces of the connecting section. When the operator presses the pedal, the locking plate rotates to a set position, which is the area where the distance between the locking plate and the fourth rotating shaft is greater than the distance between the bottom of the connecting section and the fourth rotating shaft.

[0009] According to the above technical solution, the vibration damping component includes a vibration damping spring, a vibration damping spring mounting seat, and a vibration damping bolt. A through groove is provided on the frame assembly, and the through groove is located on the vertical surface in the direction of travel of the children's vehicle. A vibration damping spring mounting seat is fixedly installed on the side of the through groove away from the triangular wheel assembly. The vibration damping bolt is slidably disposed on the side of the through groove close to the triangular wheel assembly. The vibration damping spring is connected between the vibration damping spring mounting seat and the vibration damping bolt. The vibration damping bolt is horizontally arranged, and the vibration damping bolt extends out of the through groove and is located on the rotation trajectory of the triangular wheel assembly. The vibration damping bolt is squeezed when the triangular wheel assembly rotates.

[0010] According to the above technical solution, the frame assembly includes a front bracket, a rear bracket seat, a seat plate, and a backrest. A front bracket is provided on each side of the front half of the seat plate. The front half of the seat plate is rotatably connected to the front brackets on both sides via a fifth pivot. The rear half of the seat plate is rotatably connected to the rear bracket seat via a sixth pivot. The front bracket and rear bracket seat are arranged in a V-shape. The front wheel assembly is fixedly installed at the bottom of the front bracket. The triangular wheel assembly is located on the connecting section of the rear bracket seat. The shock-absorbing assembly is located on the rear half of the seat plate. A groove for the triangular wheel assembly to rotate is provided on the seat plate. An armrest is fixedly installed at the top of the front bracket. The armrest is arranged at an angle, and the bottom of the rear half of the armrest is fixedly connected to the top of the front bracket. The bottom of the backrest is rotatably connected to the rear end of the armrest via a seventh pivot, and the middle of the backrest is rotatably connected to the top of the rear bracket seat via an eighth pivot.

[0011] According to the above technical solution, a ninth pivot and a rain canopy are provided on the upper half of the backrest. The rain canopy is rotatably connected to the front side of the backrest through the ninth pivot. The rain canopy is an existing structure and has two states: unfolded and retracted.

[0012] According to the above technical solution, the front wheel assembly includes a front wheel mounting bracket fixed on the frame assembly, a front wheel rotatably mounted on the front wheel mounting bracket, and a foot brake structure located between the front wheel mounting bracket and the front wheel; the foot brake structure is an existing structure.

[0013] This utility model has the following beneficial effects:

[0014] Firstly, the use of triangular wheel components on the stroller enables it to cross steps, thereby improving its mobility; it meets the needs of both flat ground use and step crossing scenarios, providing convenience for users.

[0015] Furthermore, the triangular wheel assembly is mounted on the frame assembly in a rotating manner, and the state between the frame assembly and the triangular wheel assembly is adjusted by a locking unit. When going over steps, the triangular wheel assembly is adjusted to rotate, thereby reducing the distance between the triangular wheel assembly and the ground contact point and the child's riding area within the frame assembly. This lowers the overall center of gravity of the stroller, or the stroller and child, improving the stroller's stability and safety when going over steps. Moreover, when a stroller is being pulled over steps, the stroller bounces up and down around the stroller's grip, meaning the bounce amplitude at the front of the triangular wheels is greater than that between the triangular wheels and the stroller's grip. After the triangular wheel assembly rotates, the center of gravity of the child's riding area shifts from the upper or front area of ​​the triangular wheel assembly to the area between the triangular wheel assembly and the stroller, thus reducing the stroller's up-and-down bounce.

[0016] Finally, a vibration damping component is installed within the rotation trajectory of the triangular wheel. When the triangular wheel assembly is rotating and crossing a step, the triangular wheel assembly acts on the vibration damping component to reduce the bumpiness caused by crossing the step, thereby improving the child's riding comfort and reducing the vibration amplitude transmitted to the drag handle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an embodiment of the present invention on a flat surface;

[0018] Figure 2 This is a schematic diagram of climbing stairs according to an embodiment of the present invention;

[0019] Figure 3 This is a partial schematic diagram of an embodiment of the present invention for climbing over steps;

[0020] Figure 4 This is a partial structural schematic diagram of the locking unit provided in an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the storage of a frame assembly excluding the locking unit and the shock absorption component provided in the embodiment of this utility model;

[0022] In the diagram, 1. Frame assembly; 1-1. Rear support bracket; 1-2. Front support; 1-3. Seat plate; 1-4. Backrest; 1-5. Fifth pivot; 1-6. Sixth pivot; 1-7. Seventh pivot; 1-8. Eighth pivot; 1-9. Ninth pivot; 1-10. Rain canopy; 1-11. Handlebar; 1-12. Armrest; 2. Front wheel assembly; 2-1. Front wheel mounting bracket; 2-2. Front wheel; 2-3. Foot brake structure; 3. Triangle wheel assembly; 3-1. L-shaped mounting bracket; 3-2. Triangle wheel; 3-3. First pivot; 3-4. Second pivot; 4. Locking unit; 4-1. Clamping plate; 4-2. Fourth pivot; 4-4. Pedal; 5. Vibration damping assembly; 5-1. Vibration damping spring; 5-2. Vibration damping spring mounting bracket; 5-3. Vibration damping bolt; 6. Step. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Reference Figures 1-5 As shown, this utility model provides a stroller that can cross steps.

[0025] Example 1

[0026] The system includes a frame assembly 1, a front wheel assembly 2 fixedly mounted on the front bottom of the frame assembly, a triangular wheel assembly 3 rotatably mounted on the rear bottom of the frame assembly, a locking unit 4 for locking the triangular wheel assembly, and a vibration damping assembly 5 disposed on the frame assembly. The locking unit is connected between the frame assembly and the triangular wheel assembly. Under the action of the locking unit, the triangular wheel assembly has two states: rotating around the frame assembly and being locked and fixed to the frame assembly. The triangular wheel assembly can only rotate in the direction of the front wheel assembly. The vibration damping assembly is located on the frame assembly between the triangular wheel assembly and the front wheel assembly and is located within the rotation trajectory of the triangular wheel assembly.

[0027] In this embodiment, a triangular wheel assembly is first used on the stroller, which enables the stroller to cross steps, thereby improving the stroller's passability; it meets the needs of both flat ground use scenarios and use scenarios when crossing steps, providing convenience for users.

[0028] Furthermore, the triangular wheel assembly is mounted on the frame assembly in a rotating manner, and the state between the frame assembly and the triangular wheel assembly is adjusted by a locking unit. When going over steps, the triangular wheel assembly is adjusted to rotate, thereby reducing the distance between the triangular wheel assembly and the ground contact point and the child's riding area within the frame assembly. This lowers the overall center of gravity of the stroller, or the stroller and child, improving the stroller's stability and safety when going over steps. Moreover, when a stroller is being pulled over steps, the stroller bounces up and down around the stroller's grip, meaning the bounce amplitude at the front of the triangular wheels is greater than that between the triangular wheels and the stroller's grip. After the triangular wheel assembly rotates, the center of gravity of the child's riding area shifts from the upper or front area of ​​the triangular wheel assembly to the area between the triangular wheel assembly and the stroller, thus reducing the stroller's up-and-down bounce.

[0029] Finally, a vibration damping component is installed within the rotation trajectory of the triangular wheel. When the triangular wheel assembly is rotating and crossing a step, the triangular wheel assembly acts on the vibration damping component to reduce the bumpiness caused by crossing the step, thereby improving the child's riding comfort and reducing the vibration amplitude transmitted to the drag handle.

[0030] Example 2

[0031] The structure and principle of Example 2 are similar to those of Example 1, except that a triangular wheel assembly structure is provided.

[0032] The triangular wheel assembly includes an L-shaped mounting bracket 3-1 and a triangular wheel 3-2; the top of the vertical section of the L-shaped mounting bracket is rotatably connected to the rear support seat 1-1 of the frame assembly via a first pivot 3-3, and the horizontal section of the L-shaped mounting bracket faces the rear of the stroller; the triangular wheel is connected to the end of the horizontal section of the L-shaped mounting bracket via a second pivot 3-4.

[0033] The vertical section of the L-shaped mounting bracket adopts a cylindrical structure, and the rear support seat is provided with a connecting section that matches the L-shaped mounting bracket. The connecting section adopts a semi-cylindrical structure that matches the cylindrical structure of the L-shaped mounting bracket. The L-shaped mounting bracket is hinged to the connecting section through a first pivot, and the dimensions of the L-shaped mounting bracket at the hinge point must meet its own rotation requirements.

[0034] In this embodiment, the joint section between the rear support base and the L-shaped mounting bracket is designed as a semi-circular tubular structure. This semi-circular tubular structure restricts the L-shaped mounting bracket from rotating towards the rear of the stroller, allowing it to rotate only towards the front. Furthermore, the dimensions of the L-shaped mounting bracket at the hinge point must meet its own rotation requirements, meaning that the L-shaped mounting bracket must not interfere with the semi-circular tubular structure during rotation.

[0035] Example 3

[0036] The structure and principle of Embodiment 3 are similar to those of Embodiment 2, except that a preferred structure of the locking unit is given based on Embodiment 2.

[0037] like Figure 4 As shown, the locking unit includes a locking plate 4-1, a fourth rotating shaft 4-2, a tension spring, and a pedal 4-4. An opening is provided on the cylindrical structure, located below the connecting section and facing the rear of the stroller. A through hole for the fourth rotating shaft to pass through is provided on the cylindrical structure at the opening. The fourth rotating shaft is rotatably connected within the through hole. Both the locking plate and the pedal are fixed to the rotating shaft and extend out of the opening. The locking plate is inclined upwards, and the pedal is inclined downwards. An L-shaped notch is provided on the locking plate. A tension spring in a stretched state connects the locking plate and the tubular structure. Under the action of the spring, the L-shaped notch of the locking plate fits against the bottom and side surfaces of the connecting section. When the operator presses the pedal, the locking plate rotates to a set position, which is the area where the distance between the locking plate and the fourth rotating shaft is greater than the distance between the bottom of the connecting section and the fourth rotating shaft.

[0038] In this embodiment, initially, under the action of the tension spring, the L-shaped notch of the retaining plate is tightly pressed against the bottom and side surfaces of the rear connecting section. The L-shaped notch engages with the connecting section of the rear support seat, thus restricting the L-shaped mounting bracket from rotating around the frame assembly. When it is necessary to climb over a step, the operator steps on the pedal, causing the retaining plate to overcome the spring force and rotate clockwise to the set position. At this time, the L-shaped mounting bracket is not restricted at the connecting section and can rotate around the first pivot towards the front of the stroller. The tension spring is located inside the cylindrical structure and is not shown in the figure. Alternatively, the retaining spring on the retaining plate side can be replaced with a torsion spring on the pivot, providing elasticity for the retaining plate to adhere to the connecting section; alternatively, the retaining spring on the retaining plate side can be replaced with a compressed spring on the pressure plate side, as long as the L-shaped notch of the retaining plate adheres to the bottom and side surfaces of the connecting section.

[0039] Other locking units can also be used, such as pin-hole designs. Matching pin holes are made in both the cylindrical and semi-cylindrical structures. By inserting the pins into the pin holes of both structures simultaneously, the same locking effect can be achieved.

[0040] Example 4

[0041] The structure and principle of Example 4 are similar to those of Examples 1-3, except that a preferred structural form of the vibration damping component is given based on Examples 1-3.

[0042] like Figures 1-2As shown, the vibration damping assembly includes a vibration damping spring 5-1, a vibration damping spring mounting base 5-2, and a vibration damping bolt 5-3. A through groove is provided on the frame assembly, located on the vertical plane in the direction of travel of the children's vehicle. A vibration damping spring mounting base is fixedly installed on the side of the through groove away from the triangular wheel assembly. The vibration damping bolt is slidably disposed on the side of the through groove close to the triangular wheel assembly. The vibration damping spring connects the vibration damping spring mounting base and the vibration damping bolt. The vibration damping bolt is horizontally arranged and extends out of the through groove, located on the rotation trajectory of the triangular wheel assembly. The vibration damping bolt is compressed when the triangular wheel assembly rotates.

[0043] In this embodiment, when the stroller climbs over a step, the triangular wheel assembly rotates, compressing the shock absorber pin located within the rotation trajectory range, thereby indirectly compressing the damping spring and reducing the bumpy feeling caused by crossing the step.

[0044] In Examples 1-4, a structural form of a conventional vehicle frame assembly is given, such as... Figure 1 , 2 As shown in Figure 5, the frame assembly includes a front support 1-2, a rear support seat, a seat plate 1-3, and a backrest 1-4. A front support is located on each side of the front half of the seat plate. The front half of the seat plate is rotatably connected to the front supports via a fifth pivot 1-5, and the rear half of the seat plate is rotatably connected to the rear support seat via a sixth pivot 1-6. The front and rear support seats are arranged in a V-shape. The front wheel assembly is fixedly installed at the bottom of the front support, the triangular wheel assembly is located on the connecting section of the rear support seat, and the shock absorption assembly is located on the rear half of the seat plate. A groove for the triangular wheel assembly to rotate is provided on the seat plate. A handrail 1-12 is fixedly installed at the top of the front support. The handrail is angled, and the bottom of its rear half is fixedly connected to the top of the front support. The bottom of the backrest is rotatably connected to the rear end of the handrail via a seventh pivot 1-7, and the middle of the backrest is rotatably connected to the top of the rear support seat via an eighth pivot 1-8. A handle 1-11 is also provided at the top of the backrest for adults to pull the stroller.

[0045] In this embodiment, the frame assembly also includes a conventional folding switch and corresponding seat and backrest angle adjustment structures. For example, adjustable electric push rods are provided between the backrest and the rear support, and between the seat and the rear support. By controlling the length of the electric push rods, the angles of the seat and backrest can be adjusted. After the folding switch is turned on, the angle adjustment structure controls the seat to rotate clockwise around the sixth pivot and the backrest to rotate clockwise around the fourth pivot, thereby folding the frame assembly for storage. Conversely, the frame assembly can be unfolded. To facilitate the folding and storage of the stroller, the front wheel assembly and the front support are fixed with a detachable connection. When the stroller is folded, the front wheel assembly can be rotated 180° and installed on the front support for easy storage.

[0046] In the above embodiment, a ninth pivot 1-9 and a rain canopy 1-10 are preferably provided on the upper half of the backrest. The rain canopy is rotatably connected to the front side of the backrest through the ninth pivot. The rain canopy is an existing structure with two states: unfolded and retracted. When the rain canopy is unfolded, it can cover the area above the seat.

[0047] In embodiments 1-4, the front wheel assembly includes a front wheel mount fixed to the frame assembly, a front wheel rotatably mounted on the front wheel mount, and a foot brake structure located between the front wheel mount and the front wheel; the foot brake structure is an existing structure.

[0048] The above are merely preferred embodiments of the present utility model, and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the protection scope of the present utility model.

Claims

1. A stroller that can cross a step, characterized in that: The system includes a frame assembly, a front wheel assembly fixedly mounted on the front bottom of the frame assembly, a triangular wheel assembly rotatably mounted on the rear bottom of the frame assembly, a locking unit for locking the triangular wheel assembly, and a damping assembly mounted on the frame assembly. The locking unit is connected between the frame assembly and the triangular wheel assembly. Under the action of the locking unit, the triangular wheel assembly has two states: rotating around the frame assembly and being locked to the frame assembly. The triangular wheel assembly can only rotate in the direction of the front wheel assembly. The damping assembly is located on the frame assembly between the triangular wheel assembly and the front wheel assembly, and is located within the rotation trajectory of the triangular wheel assembly.

2. The stroller of claim 1, wherein: The triangular wheel assembly includes an L-shaped mounting bracket and triangular wheels; the top of the vertical section of the L-shaped mounting bracket is rotatably connected to the rear support of the frame assembly via a first pivot, and the horizontal section of the L-shaped mounting bracket faces the rear of the stroller; the triangular wheels are connected to the end of the horizontal section of the L-shaped mounting bracket via a second pivot. The vertical section of the L-shaped mounting bracket adopts a cylindrical structure, and the rear support seat is provided with a connecting section that matches the L-shaped mounting bracket. The connecting section adopts a semi-cylindrical structure that matches the cylindrical structure of the L-shaped mounting bracket. The L-shaped mounting bracket is hinged to the connecting section through a first pivot, and the dimensions of the L-shaped mounting bracket at the hinge point must meet its own rotation requirements.

3. The stroller of claim 2, wherein: The locking unit includes a locking plate, a fourth rotating shaft, a tension spring, and a pedal. An opening is provided on the cylindrical structure below the connecting section and facing the rear of the stroller. A through hole for the fourth rotating shaft to pass through is provided on the cylindrical structure at the opening. The fourth rotating shaft is rotatably connected within the through hole. Both the locking plate and the pedal are fixed to the rotating shaft and extend out of the opening. The locking plate is inclined upwards, and the pedal is inclined downwards. An L-shaped notch is provided on the locking plate. A tension spring in a stretched state connects the locking plate and the tubular structure. Under the action of the spring, the L-shaped notch of the locking plate fits against the bottom and side surfaces of the connecting section. When the operator presses the pedal, the locking plate rotates to a set position, which is the area where the distance between the locking plate and the fourth rotating shaft is greater than the distance between the bottom of the connecting section and the fourth rotating shaft.

4. The stroller of any of claims 1-3, wherein: The vibration damping assembly includes a vibration damping spring, a vibration damping spring mounting base, and a vibration damping bolt. A through groove is provided on the frame assembly, located on the vertical plane in the direction of travel of the children's vehicle. A vibration damping spring mounting base is fixedly installed on the side of the through groove away from the triangular wheel assembly. The vibration damping bolt is slidably disposed on the side of the through groove closer to the triangular wheel assembly. The vibration damping spring connects the vibration damping spring mounting base and the vibration damping bolt. The vibration damping bolt is horizontally arranged and extends out of the through groove, located on the rotational trajectory of the triangular wheel assembly. The vibration damping bolt is compressed when the triangular wheel assembly rotates.

5. The step-over stroller of claim 4, wherein: The frame assembly includes a front bracket, a rear bracket seat, a seat plate, and a backrest. A front bracket is located on each side of the front half of the seat plate. The front half of the seat plate is rotatably connected to the front brackets via a fifth pivot. The rear half of the seat plate is rotatably connected to the rear bracket seat via a sixth pivot. The front and rear bracket seats are arranged in a V-shape. The front wheel assembly is fixedly mounted on the bottom of the front bracket. The triangular wheel assembly is located on the connecting section of the rear bracket seat. The shock-absorbing assembly is located on the rear half of the seat plate. A groove for the triangular wheel assembly to rotate is provided on the seat plate. An armrest is fixedly mounted on the top of the front bracket. The armrest is angled, and the bottom of its rear half is fixedly connected to the top of the front bracket. The bottom of the backrest is rotatably connected to the rear end of the armrest via a seventh pivot, and the middle of the backrest is rotatably connected to the top of the rear bracket seat via an eighth pivot.

6. The step-over stroller of claim 5, wherein: The upper half of the backrest is equipped with a ninth pivot and a rain canopy. The rain canopy is rotatably connected to the front side of the backrest via the ninth pivot. The rain canopy is an existing structure and has two states: unfolded and retracted.

7. The step-over stroller of claim 5, wherein: The front wheel assembly includes a front wheel mount fixed to the frame assembly, a front wheel rotatably mounted on the front wheel mount, and a foot brake structure located between the front wheel mount and the front wheel; the foot brake structure is an existing structure.

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