A child's pushchair chassis

Abstract

The utility model discloses a kind of child stroller frames, including frame, at least one front wheel assembly is equipped in the frame front side, at least two rear wheel assemblies are equipped in the frame rear side, the front wheel assembly includes the front wheel frame connected with frame and can rotate in horizontal plane direction relative to frame, front wheel is connected on the front wheel frame and can rotate in vertical plane relative to it, the rear wheel assembly includes the rear wheel frame connected with frame and can rotate in horizontal plane direction relative to frame, rear wheel is connected on the rear wheel frame and can rotate in vertical plane relative to it, locking mechanism for locking the position of rear wheel frame is equipped on the frame, when locking mechanism is locked, the rear wheel frame is fixed relative to frame and is prevented in horizontal plane direction rotation, when locking mechanism is unlocked, the rear wheel frame is movable relative to frame and can rotate in horizontal plane direction. The utility model is simple in structure, and can proceed front and back and can proceed left and right.

Description

Technical Field

[0001] This utility model relates to a children's stroller frame. Background Technology

[0002] Strollers are common products used in the growth of infants and toddlers. They generally consist of a frame and front and rear wheel assemblies. The front wheel assembly is usually a 360-degree swivel caster, meaning it can rotate both vertically and horizontally to adjust direction. However, the rear wheel assembly is usually fixed to the frame, so the rear wheels can only rotate vertically. While this design makes the stroller more stable, it lacks flexibility, especially in confined spaces. Furthermore, when taking children to the zoo, the seat faces the same direction as the stroller's movement. When adults push the stroller along the zoo's cages, children can only turn their heads to the side to see the animals, which can be uncomfortable.

[0003] Therefore, this utility model was created based on the above-mentioned shortcomings. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a simple stroller frame that can move both forward and backward as well as side to side. This stroller frame allows for easy pushing in confined spaces and also facilitates children's playtime at zoos.

[0005] This utility model is achieved through the following technical solution:

[0006] A stroller frame includes a frame, at least one front wheel assembly on the front side of the frame, and at least two rear wheel assemblies on the rear side of the frame. Each front wheel assembly includes a front wheel frame connected to the frame and rotatable relative to the frame in a horizontal direction, with a front wheel connected to the front wheel frame and rotatable relative to it in a vertical plane. Each rear wheel assembly includes a rear wheel frame connected to the frame and rotatable relative to the frame in a horizontal direction, with a rear wheel connected to the rear wheel frame and rotatable relative to it in a vertical plane. The frame is provided with a locking mechanism for locking the position of the rear wheel frames. When the locking mechanism is locked, the rear wheel frames are fixed relative to the frame and prevented from rotating in the horizontal direction. When the locking mechanism is unlocked, the rear wheel frames are movable relative to the frame and can rotate in the horizontal direction.

[0007] The locking mechanism includes a locking hole on the rear wheel frame, a locking pin that can slide inside the locking hole and engage or disengage from it, an operating member on the upper part of the frame, a pull rope that connects the operating member and the locking pin and can pull the locking pin away from the locking hole when the operating member is operated, and a first return spring that can push the locking pin to slide back to its original position inside the frame.

[0008] The upper part of the frame is provided with a fixed seat. The operating component includes an operating block that is slidably connected to the fixed seat and exposed. The fixed seat is provided with a transverse hole. A movable block that can move laterally within the transverse hole is provided. One end of the pull rope is connected to the movable block and the other end is connected to a locking pin. The operating block is provided with an inclined surface that can push the movable block to move when it slides inward relative to the fixed seat. A second return spring that can push the operating block to slide back to its original position is also provided between the fixed seat and the operating block.

[0009] The frame includes two front legs and two rear legs. The front wheel assembly is located at the lower end of the front legs, and the rear wheel assembly is located at the lower end of the rear legs. The stroller frame also includes a U-shaped push rod. The lower end of the push rod is rotatably connected to the upper end of the front legs via a locking joint. The upper end of the rear legs is hinged to the push rod and located near its lower end. A linkage rod is also provided between the lower end of the rear legs and the upper end of the front legs and located near the upper end of the front legs, and the operating element is located in the middle of the upper end of the push rod.

[0010] The locking joint is provided with a locking seat for connecting to the seat.

[0011] The front wheel assembly is rotatably connected to the front wheel seat at the lower end of the frame via a vertical shaft on the front wheel frame. The vertical shaft has an annular groove, and the front wheel seat has an exposed locking piece that can move laterally. The locking piece has a through hole through which the vertical shaft passes. When the locking piece moves, the inner edge of the through hole engages or disengages with the annular groove. A third return spring is provided between the locking piece and the front wheel seat. When the locking piece engages with the annular groove, the front wheel assembly is connected to the frame and can rotate relative to the frame in the horizontal direction. When the locking piece disengages from the annular groove, the front wheel assembly can disengage from the frame.

[0012] Compared with existing technologies, this utility model has the following advantages: When the locking mechanism for locking the rear wheel frame on the stroller frame of this utility model is unlocked, the rear wheel frame, along with the rear wheel, can rotate 360 ​​degrees in the horizontal direction, while the front wheel frame, along with the front wheel, can always rotate 360 ​​degrees in the horizontal direction. Therefore, when the locking mechanism is unlocked, both the front and rear wheel assemblies are in a swivel state. When the user operates the frame, the frame can move laterally left and right, like a crab, and can also move forward and backward. The movement of the stroller is very flexible, making it convenient for the stroller to pass through and move in confined spaces. In places such as zoos, adults can operate the stroller laterally along the cages so that children can face the animals inside the cages, making it convenient for children to play. When it is not necessary to use the stroller in confined spaces or special occasions such as zoos, the locking mechanism can be locked. At this time, the rear wheel frame is fixed relative to the frame and cannot rotate in the horizontal direction. The rear wheel is used as a directional wheel in conjunction with the front wheel, making the direction of the stroller more controllable and the movement more stable when moving in a straight line. Attached Figure Description

[0013] Figure 1 This is a side view of the present invention;

[0014] Figure 2 This is a three-dimensional view of the forward and backward walking state of this utility model;

[0015] Figure 3 This is a three-dimensional view of the horizontal shape of this utility model;

[0016] Figure 4 This is one of the exploded views of the components of this utility model;

[0017] Figure 5 This is the second exploded view of a component of this utility model;

[0018] Figure 6 This is a perspective view of a component of this utility model;

[0019] Figure 7 This is a cross-sectional view of a component of this utility model;

[0020] Figure 8 This is the third exploded view of the component of this utility model. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] like Figures 1 to 3As shown, a stroller frame includes a frame 1. The frame 1 has at least one front wheel assembly 2 on its front side. In this embodiment, there are two front wheel assemblies 2. The frame 1 has at least two rear wheel assemblies 3 on its rear side. The front wheel assembly 2 includes a front wheel frame 21 connected to the frame 1 and rotatable relative to the frame 1 in a horizontal direction. A front wheel 22 rotatable relative to the front wheel frame 21 is connected to the front wheel frame 21. The rear wheel assembly 3 includes a rear wheel frame 31 connected to the frame 1 and rotatable relative to the frame 1 in a horizontal direction. A rear wheel 32 rotatable relative to the rear wheel frame 31 is connected to the rear wheel frame 31. The frame 1 is provided with a locking mechanism 4 for locking the position of the rear wheel frame 31. When the locking mechanism 4 is unlocked, the rear wheel bracket 31, with the rear wheel 32, can rotate 360 ​​degrees in the horizontal direction, while the front wheel bracket 21 can always rotate 360 ​​degrees in the horizontal direction with the front wheel 22. Therefore, when the locking mechanism 4 is unlocked, both the front wheel assembly 2 and the rear wheel assembly 3 are in a swivel wheel state, allowing the user to move the frame 1 laterally (e.g., left and right) when operating the frame 1. Figure 3 As shown), similar to a crab, the stroller can move forward and backward, making it very flexible and easy to maneuver in confined spaces. In places like zoos, adults can maneuver the stroller laterally along the cages, allowing children to face the animals inside and play comfortably. When not needed in confined spaces or zoos, the locking mechanism 4 can be locked. In this case, the rear wheel frame 31 is fixed relative to the frame 1 and cannot rotate horizontally. The rear wheel 32 then functions as a directional wheel in conjunction with the front wheel 22 (e.g., ...). Figure 1 (As shown), to make the stroller move more stably.

[0023] like Figures 6 to 8 As shown, the locking mechanism 4 includes a locking hole 41 on the rear wheel frame 31. The lower part of the frame 1 has a locking pin 42 that can slide within the locking hole 41 and engage or disengage from it. The upper part of the frame 1 has an operating member 43. A pull rope 44 connects the operating member 43 and the locking pin 42, and when the operating member 43 is operated, it can pull the locking pin 42 away from the locking hole 41. The frame 1 also has a first return spring 45 that can push the locking pin 42 to slide back to its original position. When the locking mechanism 4 needs to be unlocked, the operating member 43 pulls the pull rope 44, causing the pull rope 44 to pull the locking pin 42 out of the locking hole 41. At this time, the locking mechanism 4 is unlocked, and both the rear wheel assembly 3 and the front wheel assembly 2 become omnidirectional wheels, making the stroller more flexible and convenient to move. When the locking mechanism 4 needs to be locked again, the first return spring 45 pushes the locking pin 42 into the locking hole 41. At this time, the rear wheel assembly 4 is used as a directional wheel, which, in conjunction with the front wheel assembly 2, makes the stroller move more stably.

[0024] like Figure 8As shown, the upper part of the frame 1 is provided with a fixed seat 10. The operating component 43 includes an operating block 431 that is slidably connected to the fixed seat 10 and exposed. The fixed seat 10 is provided with a transverse hole 432. A movable block 433 that can move laterally within the transverse hole 432 is provided. One end of the pull rope 44 is connected to the movable block 433, and the other end is connected to the locking pin 42. The operating block 431 is provided with an inclined surface 434 that can push the movable block 433 to move when it slides inward relative to the fixed seat 10. A second return spring 435 that can push the operating block 431 to slide back to its original position is also provided between the fixed seat 10 and the operating block 431. When the operating block 431 is pressed, the inclined surface 434 on the operating block 431 pushes the movable block 433, and the movable block 433 pulls the pull rope 44, causing the locking pin 42 to disengage from the locking hole 41, thereby unlocking the locking mechanism 4. This makes the unlocking operation of the locking mechanism 4 convenient and quick. When needed, users can simply hold the frame 1 with one hand and press the operation block 431 to unlock it. After unlocking, the frame 1 can be moved with the same hand, making it very flexible to operate the stroller with one hand.

[0025] like Figure 1 As for Figure 3 As shown, the frame 1 includes two front legs 11 and two rear legs 12. The front wheel assembly 2 is located at the lower end of the front legs 11, and the rear wheel assembly 3 is located at the lower end of the rear legs 12. The stroller frame also includes a U-shaped push rod 13. The lower end of the push rod 13 is rotatably connected to the upper end of the front legs 11 through a locking joint 14. The upper end of the rear legs 12 is hinged to the push rod 13 and located near its lower end. A linkage rod 17 is also provided between the lower end of the rear legs 12 and the upper end of the front legs 11 and located near the upper end of the front legs 11, and is hinged to both of them. The operating element 43 is located in the middle of the upper end of the push rod 13. Therefore, after the locking joint 14 is unlocked, the stroller frame can be folded and stowed. Specifically, the push rod 13 rotates relative to the front leg 11 and the rear leg 12, the upper end of the push rod 13 moves closer to the rear wheel 32, and the push rod 13 comes closer to the rear leg 12. During this process, the linkage rod 17 rotates relative to the rear leg 12 and the front leg 11, and the front leg 11 also comes closer to the rear leg 12. The entire stroller frame is convenient to carry or store after folding. The child's seat can be a flexible seat bag attached to the frame 1. Alternatively, a snap-fit ​​seat 15 can be provided on the locking joint 14, and the individual seat assembly can be detachably connected to the snap-fit ​​seat 15.

[0026] like Figure 4 and Figure 5As shown, the front wheel assembly 2 is rotatably connected to the front wheel seat 16 at the lower end of the frame 1 via a vertical shaft 23 on the front wheel bracket 21. The vertical shaft 23 has an annular groove 51. The front wheel seat 16 has an exposed locking piece 52 that can move laterally. The locking piece 52 has a through hole 53 through which the vertical shaft 23 passes. When the locking piece 52 moves, the inner edge of the through hole 53 engages or disengages from the annular groove 51. A third return spring 54 is provided between the locking piece 52 and the front wheel seat 16. When the locking piece 52 engages with the annular groove 51, the front wheel assembly 2 is connected to the frame 1 and can rotate relative to the frame 1 in the horizontal direction. When the locking piece 42 is pressed to disengage the locking piece 52 from the annular groove 51, the front wheel assembly 2 can be pulled off the front wheel seat 16. In this embodiment, the rear wheel assembly 3 also adopts the same structure and is detachably connected to the frame 1, which will not be described further here. The front wheel assembly 2 and the rear wheel assembly 3 are detachably connected to the frame 1, which can reduce the product packaging volume and make it easy to replace the wheels if they are damaged.

[0027] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A stroller frame, characterized in that: The vehicle includes a frame (1), with at least one front wheel assembly (2) on the front side of the frame (1) and at least two rear wheel assemblies (3) on the rear side of the frame (1). The front wheel assembly (2) includes a front wheel frame (21) connected to the frame (1) and rotatable relative to the frame (1) in a horizontal direction. A front wheel (22) is connected to the front wheel frame (21) and rotatable relative to it in a vertical plane. The rear wheel assembly (3) includes a front wheel frame (22) connected to the frame (1) and rotatable relative to the frame (1) in a horizontal direction. A rear wheel frame (31) that rotates in the horizontal direction is connected to a rear wheel (32) that can rotate relative to it in the vertical plane. The frame (1) is provided with a locking mechanism (4) for locking the position of the rear wheel frame (31). When the locking mechanism (4) is locked, the rear wheel frame (31) is fixed relative to the frame (1) and prevented from rotating in the horizontal direction. When the locking mechanism (4) is unlocked, the rear wheel frame (31) moves relative to the frame (1) and can rotate in the horizontal direction.

2. The stroller frame according to claim 1, characterized in that: The locking mechanism (4) includes a locking hole (41) on the rear wheel frame (31), and a locking pin (42) is provided on the lower part of the frame (1) so as to slide inside and engage or disengage from the locking hole (41). An operating member (43) is provided on the upper part of the frame (1). A pull rope (44) is provided between the operating member (43) and the locking pin (42) to connect the two and to pull the locking pin (42) to disengage from the locking hole (41) when the operating member (43) is operated. A first return spring (45) is also provided inside the frame (1) to push the locking pin (42) to slide back to its original position.

3. The stroller frame according to claim 2, characterized in that: The frame (1) is provided with a fixed seat (10) on the upper part. The operating component (43) includes an operating block (431) that is slidably connected to the fixed seat (10) and exposed. The fixed seat (10) is provided with a transverse hole (432). A moving block (433) that can move laterally inside the transverse hole (432) is provided. One end of the pull rope (44) is connected to the moving block (433), and the other end is connected to the locking pin (42). The operating block (431) is provided with an inclined surface (434) that can push the moving block (433) to move when it slides inward relative to the fixed seat (10). A second return spring (435) that can push the operating block (431) to slide back to its original position is also provided between the fixed seat (10) and the operating block (431).

4. The stroller frame according to claim 2 or 3, characterized in that: The frame (1) includes two front legs (11) and two rear legs (12). The front wheel assembly (2) is located at the lower end of the front leg (11), and the rear wheel assembly (3) is located at the lower end of the rear leg (12). The stroller frame also includes a U-shaped push rod (13). The lower end of the push rod (13) is rotatably connected to the upper end of the front leg (11) through a locking joint (14). The upper end of the rear leg (12) is hinged to the push rod (13) and close to its lower end. A linkage rod (17) is also provided between the lower end of the rear leg (12) and the upper end of the front leg (11) and close to the upper end of the front leg (11). The operating element (43) is located in the middle of the upper end of the push rod (13).

5. The stroller frame according to claim 4, characterized in that: The locking joint (14) is provided with a snap-fit ​​seat (15) for connecting to a seat.

6. The stroller frame according to claim 4, characterized in that: The front wheel assembly (2) is rotatably connected to the front wheel seat (16) at the lower end of the frame (1) via a vertical shaft (23) on the front wheel frame (21). The vertical shaft (23) is provided with an annular groove (51). The front wheel seat (16) is provided with an exposed locking piece (52) that can move laterally. The locking piece (52) is provided with a through hole (53) through which the vertical shaft (23) passes. When the locking piece (52) moves, the through hole... (53) The inner edge engages or disengages from the annular groove (51). A third return spring (54) is provided between the locking piece (52) and the front wheel seat (16). When the locking piece (52) engages with the annular groove (51), the front wheel assembly (2) is connected to the frame (1) and can rotate relative to the frame (1) in the horizontal direction. When the locking piece (52) disengages from the annular groove (51), the front wheel assembly (2) can disengage from the frame (1).

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