Strollers

Abstract

The present invention discloses a child stroller, comprising a stroller frame, a front wheel assembly arranged at the bottom front part of the stroller frame, and a rear wheel assembly arranged at the bottom rear part of the stroller frame, wherein the front wheel assembly comprises a wheel axle fixedly connected to the stroller frame, a steering member rotatably connected to the wheel axle via a first axis, and a front wheel rotatably connected to the steering member via a second axis, wherein the first axis extends in the up-down direction, and the second axis extends in the left-right direction. When the child stroller is moving normally, the front wheel rotates around the second axis relative to the steering member, the wheel axle, and the stroller frame; and when the child stroller needs to turn, the steering member can drive the front wheel to rotate around the first axis relative to the wheel axle and the stroller frame, thereby turning the child stroller, without pressing down the push handle to lift the front wheel assembly, thus saving time and effort and facilitating the use of the child stroller.

Description

Technical Field

[0001] The present invention relates to the technical field of children's products, and in particular to a children's stroller. Background Art

[0002] Strollers provide great convenience for adults to carry small children for outdoor activities. As a type of stroller, treadmills are easier and more convenient to push while running.

[0003] In the prior art, the front wheel assembly of the treadmill generally does not have a steering function. When the treadmill needs to turn, the handle is generally pressed down to lift the front wheel assembly, and then the treadmill is turned. This steering method is time-consuming and labor-intensive, and there are certain safety hazards. Summary of the invention

[0004] The object of the present invention is to provide a child stroller in view of the deficiencies in the prior art, wherein the front wheel assembly of the child stroller has a steering function, so that when the child stroller is pushed to turn, there is no need to press down the handle to lift the front wheel assembly.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A child stroller comprises a stroller frame, a front wheel assembly arranged at the bottom front portion of the stroller frame, and a rear wheel assembly arranged at the bottom rear portion of the stroller frame, wherein the front wheel assembly comprises a wheel axle fixedly connected to the stroller frame, a steering member rotatably connected to the wheel axle via a first axis, and a front wheel rotatably connected to the steering member via a second axis, wherein the first axis extends in an up-down direction, and the second axis extends in a left-right direction.

[0007] Preferably, the wheel axle includes a transverse axis extending in the left-right direction, the first shaft is fixedly arranged on the transverse axis, and the first shaft is rotatably arranged in the steering member.

[0008] Furthermore, the axis line of the horizontal axis and the axis line of the second axis extend in the same straight line direction, or the axis line of the horizontal axis is parallel to the axis line of the second axis, or the axis line of the horizontal axis and the axis line of the second axis intersect obliquely, or the axis line of the horizontal axis is perpendicular to the axis line of the first axis.

[0009] Furthermore, the first axis is arranged in the middle of the horizontal axis and is located at the front side or the rear side of the horizontal axis.

[0010] Furthermore, the left and right ends of the transverse axis are respectively provided with connecting parts, and the cart frame is provided with a bayonet matching the connecting part, and the connecting part is located in the bayonet so that the transverse axis cannot rotate relative to the cart frame.

[0011] Preferably, the axis centerline of the first shaft is perpendicular to the road surface on which the child stroller travels, or the axis centerline of the first shaft obliquely intersects with the road surface on which the child stroller travels.

[0012] Preferably, the front wheel comprises a wheel hub located on the inner side, the steering member is accommodated in an inner ring of the wheel hub, and the first shaft is accommodated in the steering member.

[0013] Preferably, the steering member is in a disc-shaped structure, the outer circumferential surface of the steering member matches the inner circumferential surface of the wheel hub, and the wheel hub is sleeved outside the steering member and can be rotatably arranged around the steering member.

[0014] Preferably, the front wheel assembly further comprises a roller rotatably disposed on the steering member, a plurality of the rollers are spaced apart along the circumferential direction of the steering member, and an outer circumferential surface of each roller is tangent to an inner circumferential surface of the wheel hub.

[0015] Preferably, the child stroller further comprises a bearing arranged between the first shaft and the steering member.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: when the stroller of the present invention is moving normally, the front wheel rotates around the second axis relative to the steering member, the wheel axle and the stroller frame; and when the stroller needs to turn, the steering member can drive the front wheel to rotate around the first axis relative to the wheel axle and the stroller frame, so that the stroller can turn, and there is no need to press down the push handle to lift the front wheel assembly, which saves time and effort and facilitates the use of the stroller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 is a three-dimensional schematic diagram of a child stroller of this embodiment;

[0018] Attached Figure 2 is a schematic top view of the child stroller of this embodiment (the child stroller is moving straight);

[0019] Attached Figure 3 1 is a schematic top view of the connection between the front wheel assembly and the stroller frame of the child stroller of this embodiment (the child stroller is moving straight);

[0020] Attached Figure 4 1 is a top view schematically showing a cross-sectional view of the connection between the front wheel assembly and the stroller frame of the stroller of this embodiment (the stroller is moving straight);

[0021] Attached Figure 5 is a schematic top view of the child stroller of this embodiment (the child stroller turns left);

[0022] Attached Figure 61 is a schematic top view of the connection portion between the front wheel assembly and the stroller frame of the stroller of this embodiment (the stroller is turning left);

[0023] Attached Figure 7 1 is a top view schematically showing a cross-sectional view of the connection between the front wheel assembly and the stroller frame of the stroller of this embodiment (the stroller is turning left);

[0024] Attached Figure 8 is a schematic top view of the child stroller of this embodiment (the child stroller turns right);

[0025] Attached Fig. 9 1 is a schematic top view of the connection portion between the front wheel assembly and the stroller frame of the stroller of this embodiment (the stroller is turning right);

[0026] Attached Fig.10 1 is a top view schematically showing a cross-sectional view of the connection between the front wheel assembly and the stroller frame of the stroller of this embodiment (the stroller is turning right);

[0027] Attached Fig.11 It is a three-dimensional schematic diagram of the connection portion between the front wheel assembly and the stroller frame of the child stroller of this embodiment;

[0028] Attached Fig.12 This is an exploded schematic diagram of the connection between the front wheel assembly and the stroller frame of the child stroller of this embodiment;

[0029] Attached Fig.13 Schematic diagram of the structure of the front wheel assembly of the stroller of the present embodiment (the axis centerline of the horizontal axis and the axis centerline of the second axis extend in the same straight line direction, and the axis centerline of the first axis is perpendicular to the road surface);

[0030] Attached Fig.14 For attachment Fig.13 An enlarged schematic diagram of the central part;

[0031] Attached Fig.15 Schematic diagram of the structure of the front wheel assembly of the stroller of the present embodiment (the axis centerline of the horizontal axis is parallel to the axis centerline of the second axis, and the axis centerline of the first axis is perpendicular to the road surface);

[0032] Attached Fig.16 For attachment Fig.15 An enlarged schematic diagram of the central part;

[0033] Attached Fig.17 Schematic diagram of the structure of the front wheel assembly of the stroller of the present embodiment (the axis centerline of the horizontal axis is parallel to the axis centerline of the second axis, and the axis centerline of the first axis intersects the road surface obliquely);

[0034] Attached Fig.18 For attachment Fig.17 A magnified schematic diagram of the center part.

[0035] Among them: 1. cart frame; 11. main frame; 12. push handle; 13. front fork; 131. bayonet; 2. front wheel assembly; 21. wheel axle; 211. first axis; 212. transverse axis; 212a. connecting part; 22. steering member; 221. accommodating cavity; 23. front wheel; 231. wheel hub; 24. second axis; 25. bearing; 26. roller; 3. rear wheel assembly. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] like Figure 1 As shown, the child stroller of the present invention comprises a stroller frame 1 , a front wheel assembly 2 arranged at the bottom front portion of the stroller frame 1 , and a rear wheel assembly 3 arranged at the bottom rear portion of the stroller frame 1 .

[0038] The cart frame 1 comprises a main frame 11, a push handle 12 arranged at the upper rear portion of the main frame 11, and a front fork 13 arranged at the bottom front portion of the main frame 11. The front wheel assembly 2 is arranged on the front fork 13, and the rear wheel assembly 3 is arranged at the bottom rear portion of the main frame 11.

[0039] The front wheel assembly 2 has a steering function, so that when the baby stroller is pushed and used, it can turn automatically without pressing down the push handle 12 to lift the front wheel assembly 2, which saves time and effort and facilitates the use of the baby stroller.

[0040] like Fig.10 and Fig.11 As shown, the front wheel assembly 2 includes an axle 21, a steering member 22 and a front wheel 23. The axle 21 is fixedly arranged on the front fork 13, the steering member 22 is rotatably connected to the axle 21 through a first shaft 211, and the front wheel 23 is rotatably connected to the steering member 22 through a second shaft 24. The first shaft 211 extends in the up-down direction, and the second shaft 24 extends in the left-right direction.

[0041] When the baby stroller is moving normally, the front wheel 23 rotates around the second axis 24 relative to the steering member 22, the wheel axle 21 and the stroller frame 1. When the steering member 22 rotates to the left or right relative to the wheel axle 21 and the stroller frame 1 around the first axis 211, the front wheel 23 can be driven to rotate to the left or right relative to the wheel axle 21 and the stroller frame 1 synchronously, thereby realizing the steering action of the baby stroller to the left or right.

[0042] Specifically, the wheel axle 21 includes a transverse axis 212, the transverse axis 212 extends in the left-right direction, the transverse axis 212 is fixedly connected to the front fork 13, and the first axis 211 is fixedly arranged on the transverse axis 212. In this embodiment, the child stroller is a tricycle, the front wheel assembly 2 is arranged at the bottom middle part of the stroller frame 1, and the first axis 211 is fixedly arranged at the middle part of the transverse axis 212 in the left-right direction, and is located at the front side or rear side of the transverse axis 212.

[0043] The steering member 22 is provided with a receiving cavity 221 matching the first shaft 211 , and the first shaft 211 is rotatably disposed in the receiving cavity 221 .

[0044] In this embodiment, the steering member 22 is a disc-shaped structure, and the front wheel 23 has a hub 231. The hub 231 of the front wheel 23 is sleeved on the outside of the steering member 22, that is, the steering member 22 is accommodated in the inner circle of the hub 231. The axis of the second shaft 24, the axis of the steering member 22 and the axis of the front wheel 23 are collinear.

[0045] The axis of the horizontal axis 212 may extend in the same straight line direction as the axis of the second axis 24. Fig.13 and Fig.14 shown.

[0046] Alternatively, the axis of the horizontal axis 212 and the axis of the second axis 24 may deviate from each other by a certain distance, or they may be arranged in parallel. Figure 15~Figure 18 shown.

[0047] Alternatively, the axis center line of the horizontal axis 212 may intersect the axis center line of the second axis 24 at an angle.

[0048] The axis of the first axis 211 can be arranged perpendicular to the road surface on which the stroller travels. Figure 13~Figure 16 The axis of the first axis 211 may also be arranged to intersect the road surface on which the stroller travels at an angle, such as Fig.17 and Fig.18 shown.

[0049] Preferably, the axis centerline of the first axis 211 is perpendicular to the axis centerline of the horizontal axis 212 .

[0050] The left and right ends of the transverse shaft 212 are fixedly connected to the front fork 13. Specifically, the left and right ends of the transverse shaft 212 are respectively provided with connecting parts 212a, and the front fork 13 is provided with a bayonet 131 matching the connecting part 212a, and the connecting part 212a is located in the bayonet 131, so that when the front wheel 23 rotates, the transverse shaft 212 cannot rotate relative to the front fork 13.

[0051] In this embodiment, the connecting portion 212a is a milling plane arranged on the upper and lower sides of the end of the transverse axis 212, and the upper and lower side surfaces of the bayonet 131 can be clamped on the milling plane on the corresponding side, so that the transverse axis 212 cannot rotate relative to the front fork 13 through the cooperation between the bayonet 131 and the milling planes on the upper and lower sides.

[0052] The front wheel assembly 2 further includes a bearing 25 disposed between the steering member 22 and the first shaft 211, and the bearing 25 is also accommodated in the accommodating cavity 221 on the steering member 22. The arrangement of the bearing 25 reduces the friction when the steering member 22 rotates around the first shaft 211, making the steering member 22 more flexible in rotation, and making it easier for the child stroller to achieve steering operations.

[0053] In a specific implementation, the inner circumference of the wheel hub 231 of the front wheel 23 can be directly abutted against the outer circumference of the steering member 22. In this arrangement, the steering member 22 is the second shaft 24. When the child stroller is moving normally, the front wheel 23 rotates relative to the steering member 22. Since the inner circumference of the wheel hub 231 is always in contact with the outer circumference of the steering member 22, the friction between the inner circumference of the wheel hub 231 and the outer circumference of the steering member 22 is relatively large, and the rotation of the front wheel 23 relative to the steering member 22 is not particularly flexible, thereby affecting the travel speed of the child stroller.

[0054] In a preferred embodiment, the front wheel assembly 2 further includes a roller 26 rotatably disposed on the steering member 22, and a plurality of rollers 26 are disposed at intervals along the circumferential direction of the steering member 22. The outer circumferential surface of each roller 26 is tangent to the inner circumferential surface of the wheel hub 231, and a small gap exists between the inner circumferential surface of the wheel hub 231 and the outer circumferential surface of the steering member 22, that is, the inner circumferential surface of the wheel hub 231 is only in line contact with the outer circumferential surface of each roller 26. This can reduce the friction resistance when the front wheel 23 rotates, and the front wheel 23 is more flexible in rotating relative to the steering member 22, thereby increasing the travel speed of the stroller and making it easier to push the stroller when running.

[0055] The stroller of the present embodiment is preferably a treadmill, the wheel axle 21 and the steering member 22 remain stationary relative to the stroller frame 1, and the front wheel 23 rotates around the second axis 24 relative to the steering member 22 to enable the stroller to move normally. Figure 2~Figure 4 shown.

[0056] When the stroller needs to turn left during its movement, the push handle 12 is held to apply force in the left direction to the stroller, and the steering member 22 rotates leftward relative to the wheel shaft 21 around the first axis 211, driving the front wheel 23 to rotate leftward around the first axis 211 synchronously, and the stroller can turn leftward. Figure 5~Figure 7 shown.

[0057] When the stroller needs to turn right during its travel, the push handle 12 is held to apply force in the right direction to the stroller, and the steering member 22 rotates rightward relative to the wheel shaft 21 around the first axis 211, driving the front wheel 23 to rotate rightward around the first axis 211 synchronously, and the stroller can turn right. Figure 8~Figure 10 shown.

[0058] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A child stroller, comprising a stroller frame, a front wheel assembly arranged at the bottom front portion of the stroller frame, and a rear wheel assembly arranged at the bottom rear portion of the stroller frame, characterized in that: The front wheel assembly includes a wheel axle fixedly connected to the cart frame, a steering member rotatably connected to the wheel axle via a first axis, and a front wheel rotatably connected to the steering member via a second axis, the first axis extending in the up-down direction, and the second axis extending in the left-right direction; the wheel axle includes a transverse axis extending in the left-right direction, and the first axis is fixedly arranged on the transverse axis.

2. The baby stroller according to claim 1, characterized in that: The first shaft is rotatably disposed within the steering member.

3. The stroller according to claim 2, characterized in that: The axis line of the horizontal axis and the axis line of the second axis extend in the same straight line direction, or the axis line of the horizontal axis is parallel to the axis line of the second axis, or the axis line of the horizontal axis intersects the axis line of the second axis at an angle, or the axis line of the horizontal axis is perpendicular to the axis line of the first axis.

4. The stroller according to claim 2, characterized in that: The first axis is arranged in the middle of the horizontal axis and is located at the front side or the rear side of the horizontal axis.

5. The stroller according to claim 2, characterized in that: The left and right ends of the transverse axis are respectively provided with connecting parts, and the cart frame is provided with a bayonet matching the connecting part. The connecting part is located in the bayonet so that the transverse axis cannot rotate relative to the cart frame.

6. The stroller according to claim 1, characterized in that: The axis center line of the first shaft is perpendicular to the road surface on which the child stroller travels, or the axis center line of the first shaft obliquely intersects with the road surface on which the child stroller travels.

7. The stroller according to claim 1, characterized in that: The front wheel includes a wheel hub located on the inner side, the steering member is accommodated in an inner ring of the wheel hub, and the first shaft is accommodated in the steering member.

8. The stroller according to claim 7, characterized in that: The steering member is in a disc-shaped structure, the outer peripheral surface of the steering member matches the inner peripheral surface of the wheel hub, and the wheel hub is sleeved outside the steering member and can be rotatably arranged around the steering member.

9. The baby stroller according to claim 7, characterized in that: The front wheel assembly also includes a roller rotatably arranged on the steering member, a plurality of rollers are arranged at intervals along the circumferential direction of the steering member, and an outer peripheral surface of each roller is tangent to an inner peripheral surface of the wheel hub.

10. The baby stroller according to claim 1, characterized in that: The stroller further includes a bearing disposed between the first shaft and the steering member.

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