A multi-functional child stroller with a high-security carrier

Abstract

This utility model discloses a multifunctional children's stroller with a highly safe support structure, including a crankshaft, a frame, a crank, a support structure, and a rocker arm. The crankshaft is rotatably mounted on the frame and can rotate when the stroller is pushed. One end of the crank is fixedly connected to the crankshaft, and the other end is pinned to the support structure. The bottom end of the rocker arm is pinned to the frame, and the top end is pinned to the bottom front end of the support structure. The support structure is a shell structure. The top of the support structure is recessed to form a transverse groove, and a central rib is fixedly connected within the transverse groove. The central rib is arranged along the longitudinal centerline of the support structure, with its front end fixedly connected to the front wall of the transverse groove, its bottom end fixedly connected to the bottom of the transverse groove, and its rear end fixedly connected to the rear wall of the transverse groove. This utility model improves the safety of the multifunctional children's stroller while retaining its fun.

Description

Technical Field

[0001] This utility model belongs to the field of children's vehicle technology, specifically relating to a multifunctional children's stroller with a highly safe load-bearing structure. Background Technology

[0002] In the field of children's products, traditional strollers generally adopt a translational walking structure, which provides a smooth but uninteresting ride. To improve the riding experience for infants and toddlers, existing technologies have introduced strollers with dynamic undulation functions, such as the "Novel Stimulating and Parallel Walking Stroller" disclosed in Chinese Patent CN101492066A. This stroller uses the mechanical linkage of crankshafts, connecting rods, and a support body to transform the translational motion of the wheels into the undulating and swaying motion of the support body, achieving switching between parallel walking mode and dynamic mode, thus enhancing the riding experience for infants and toddlers. However, this existing technology only discloses the basic structure of the stroller, but the use of this support body structure results in low safety for the stroller. Utility Model Content

[0003] In view of this, the present invention provides a multifunctional children's stroller with a highly safe load-bearing structure, which improves the safety of the multifunctional children's stroller while retaining the fun of strolling.

[0004] This utility model is achieved through the following technical solution:

[0005] A multifunctional children's stroller with a high-safety support body includes a crankshaft, a frame, a crank, a support body, and a rocker arm. The crankshaft is rotatably mounted on the frame and can rotate when the stroller is pushed. One end of the crank is fixedly connected to the crankshaft, and the other end is pinned to the support body. The bottom end of the rocker arm is pinned to the frame. The top end of the rocker arm is pinned to the bottom front end of the support body. The support body has a shell structure. The top of the support body is recessed to form a transverse through groove. A central rib is fixedly connected in the transverse through groove. The central rib is arranged along the longitudinal centerline of the support body. The front end of the central rib is fixedly connected to the front wall of the transverse through groove, the bottom end is fixedly connected to the bottom of the transverse through groove, and the rear end is fixedly connected to the rear wall of the transverse through groove.

[0006] Furthermore, a seat is provided on the carrier; the seat is located on top of the carrier and behind the transverse through slot, and the crankshaft is located below the seat;

[0007] When the crank pin axis is at its highest point, the vertical distance H between the top and bottom pin axes of the rocker arm is greater than or equal to the crank's eccentricity.

[0008] The crank eccentricity ranges from 20mm to 60mm, and the maximum pitch angle θ of the seat surface ranges from 0° to 30°.

[0009] Furthermore, the horizontal distance D between the bottom pin axis of the rocker arm and the axis of the crankshaft ranges from 200mm to 400mm, and the vertical distance H between the top pin axis and the bottom pin axis of the rocker arm ranges from 20mm to 340mm.

[0010] Furthermore, the top of the rocker arm and the pin joint of the carrier are located in front of the axial through groove.

[0011] Furthermore, the bottom portion of the transverse through groove located on both sides of the central rib forms two pedals, and a connecting plate is fixedly connected between the two pedals.

[0012] Furthermore, the top surface of the central rib is curved, and the center line of the curved surface is an arc-shaped center line. The lowest point of the arc-shaped center line is located at a height lower than the height of the top surface of the seat.

[0013] Furthermore, the width of the central rib gradually decreases from bottom to top.

[0014] Furthermore, a handrail is provided at the top front end of the central rib.

[0015] Furthermore, a protrusion is provided on the top surface of the seat, which is located at the front end of the top surface of the seat or along the edge of the seat.

[0016] Furthermore, the multi-functional stroller also includes drive wheels, drive shafts, and a transmission mechanism;

[0017] The drive shaft is rotatably mounted on the chassis of the car. The drive wheel is one of the rear wheels of the rocking horse, and the drive wheel is coaxially connected to the drive shaft. The drive shaft drives the crankshaft and crank to rotate through a transmission mechanism to reduce speed.

[0018] Beneficial effects:

[0019] (1) The present invention provides a multi-functional children's stroller with a high safety load-bearing body. Through the setting of the middle rib, the overall rigidity and impact resistance of the load-bearing body are greatly improved. When the child is riding, his / her legs are separated on both sides by the middle rib, and cannot be brought together or crossed, which effectively limits his / her twisting range, reduces some sudden dangerous behaviors, and improves the safety of children riding the stroller.

[0020] (2) The present invention provides a multi-functional children's stroller with a high safety load-bearing body. By simultaneously limiting the eccentricity of the crank and the pitch angle of the load-bearing body, the stroller's movement range is ensured to be moderate and excessive swaying is prevented. It can produce obvious undulations and enhance the fun without being too violent, thus further ensuring the safety and comfort of infants and young children.

[0021] (3) In this utility model, the crankshaft, chassis, rocker arm, and carrier form a crank-rocker structure or a double-crank structure. After the eccentricity of the crank is relatively determined, the horizontal distance D between the axis of the bottom pin shaft of the rocker arm and the axis of the crankshaft has a significant impact on the pitch angle. This utility model sets the range of the above-mentioned horizontal distance D to 200mm to 400mm to facilitate the design of the pitch angle. The vertical distance H of the rocker arm in the vertical direction is in the range of 20mm to 340mm. The geometric constraints formed between the crankshaft, chassis, rocker arm, and carrier are quantified to facilitate the overall design of the trolley.

[0022] (4) The top of the rocker arm of this utility model is located in front of the transverse through groove, which is more advantageous than being located at the bottom of the transverse through groove. This helps to reduce and increase the rocking amplitude of the front end of the multi-functional trolley and increase the stability during rocking.

[0023] (5) The bottom part of the transverse through groove of this utility model is located on both sides of the middle rib to form two pedals, and a connecting plate is fixedly connected between the two pedals, which further improves the strength of the load-bearing body and thus improves the safety of the trolley.

[0024] (6) The top surface of the rib in this utility model is curved, and the lowest point of the arc center line is lower than the height of the top surface of the seat, which improves the comfort of children riding.

[0025] (7) The width of the middle rib of this utility model gradually decreases from bottom to top, which improves the strength of the load-bearing body and the comfort of children riding.

[0026] (8) The front end of the middle rib of this utility model is provided with a handrail. The handrail is placed on the middle rib, which is closer to the seat and makes it easier for children to hold it.

[0027] (9) The top surface of the seat of this utility model is provided with a protrusion. The protrusion is provided at the front end of the top surface of the seat or along the edge of the seat to ensure that the child does not slide forward when the multi-functional stroller is rocked, so as to improve the safety of the stroller. Attached Figure Description

[0028] Figure 1 This is a side view of a multifunctional children's stroller with a highly safe load-bearing structure according to the present invention.

[0029] Figure 2 This is a structural diagram of the internal structure of the multifunctional children's stroller of this utility model (the load-bearing body is not shown);

[0030] Figure 3 The three-dimensional support of this utility model Figure I ;

[0031] Figure 4 The three-dimensional support of this utility model Figure II ;

[0032] Figure 5 This is a side view of the carrier of this utility model;

[0033] Figure 6 This is a top view of the carrier of this utility model;

[0034] Figure 7 A simplified diagram of the crank-rocker structure;

[0035] Figure 8 This is an example diagram of a transmission mechanism according to the present invention;

[0036] Figure 9 The structure of the sliding sleeve of this utility model Figure I ;

[0037] Figure 10 The structure of the sliding sleeve of this utility model Figure II ;

[0038] Figure 11 This is an example diagram showing the connection relationship between the drive shaft and the drive wheel of this utility model.

[0039] Among them, 1-bearing body, 101-central rib, 1011-mounting hole, 1012-curved surface, 1013-arc center line, 1014-lowest point, 103-pedal, 104-bore, 105-connecting plate;

[0040] 2-Crank, 3-Underframe, 4-Rockarm, 5-Seat, 501-Partial seat, 6-Drive wheel, 7-Transmission mechanism, 71-Drive wheel, 72-Driven wheel, 73-Transmission component, 74-Idler wheel carrier, 8-Drive shaft, 9-Crankshaft, 10-Buffer spring, 11-Sliding sleeve, 111-Guide groove I, 112-Guide groove II, 12-Guide block, 13-Guide boss, 14-Push handle, 15-Guardrail, 16-Handrail. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Example 1:

[0043] This embodiment provides a multifunctional child stroller with a highly safe support structure; see appendix. Figure 1 and 2 It includes crankshaft 9, chassis 3, crank 2, carrier 1 and rocker arm 4;

[0044] The crankshaft 9 is rotatably mounted on the chassis 3. When the trolley is pushed, the crankshaft 9 can rotate. One end of the crank 2 is fixedly connected to the crankshaft 9, and the other end is pinned to the carrier 1. The bottom end of the rocker arm 4 is pinned to the chassis 3. The top end of the rocker arm 4 is pinned to the bottom front end of the carrier 1.

[0045] See appendix Figure 3 The support body 1 is a shell structure; the top of the support body 1 is recessed to form a transverse through groove, and a central rib 101 is fixedly connected in the transverse through groove. The central rib 101 is set along the longitudinal center line of the support body 1. The front end of the central rib 101 is fixedly connected to the front wall of the transverse through groove, the bottom end is fixedly connected to the bottom of the transverse through groove, and the rear end is fixedly connected to the rear wall of the transverse through groove. The central rib 101 can be fastened to the transverse through groove or it can be integrally formed.

[0046] A seat 5 is provided on the carrier 1; the seat 5 is located at the top rear end of the carrier 1, and the crankshaft 9 is located below the seat 5;

[0047] When the pin joint axis of crank 2 is at its highest, the vertical distance H between the top pin joint axis and the bottom pin joint axis of rocker 4 is greater than or equal to the eccentricity of crank 2.

[0048] The eccentricity of crank 2 ranges from 20mm to 60mm, and the maximum pitch angle θ of seat 5 ranges from 0° to 30°.

[0049] This embodiment provides a multifunctional children's stroller with a high-safety load-bearing structure, which significantly improves the stroller's safety from two dimensions: structural reinforcement and parameter optimization. On the one hand, in dynamic mode, the load-bearing structure frequently bears alternating loads from undulating motion, requiring high strength. The central rib significantly improves the overall rigidity and impact resistance of the load-bearing structure. Furthermore, when a child is riding, their legs are separated to both sides by the central rib, preventing them from closing or crossing their legs, effectively limiting their twisting range and reducing some sudden dangerous behaviors. On the other hand, the eccentricity of the crank 2 ranges from 20mm to 60mm, and the maximum elevation angle ranges from 0° to 30°, ensuring that the stroller's movement amplitude is moderate and preventing excessive swaying. This produces a noticeable undulating sensation, enhancing the fun, without being too violent, thus ensuring the safety and comfort of infants and toddlers.

[0050] It should be noted that the maximum pitch angle θ of the seat 5 is the angle between the extreme position of the seat tilting forward and the extreme position of the seat tilting backward when the stroller is rocking.

[0051] Let the horizontal plane where the top pin joint axis of the rocker 4 is located be horizontal plane I, and the horizontal plane where the bottom pin joint axis of the rocker is located be horizontal plane II. The distance between horizontal plane I and horizontal plane II is the aforementioned vertical distance H.

[0052] The eccentricity is the distance between the pin connection axis of crank 2 and bearing 1 and the axis of crankshaft 9;

[0053] See appendix Figure 3 The bottom part of the transverse through groove located on both sides of the middle rib 101 forms two pedals 103. The pedals 103 are provided with anti-slip texture to improve the comfort and safety of children riding.

[0054] For further details, please see the appendix. Figure 4 A connecting plate 105 is fixedly connected between the two pedals 103 to further improve the strength of the load-bearing body and thus improve the safety of the trolley.

[0055] See appendix Figure 3 , 5 In the case of seat 6, the top surface of the middle rib 101 is curved 1012, the center line of the curved surface 1012 is an arc-shaped center line 1013, and the lowest point 1014 of the arc-shaped center line 1013 is located at a height lower than the height of the top surface of seat 5; the horizontal width of the middle rib 101 gradually decreases from bottom to top; all of these can improve the comfort of children riding.

[0056] The front top of the central rib 101 is provided with a mounting hole 1011, and the armrest 16 is installed in the mounting hole 1011. The armrest 16 is placed on the central rib 101, closer to the seat, making it easier for children to hold on.

[0057] The top surface of seat 5 is provided with a protrusion 104. The protrusion can be set at the front end of the top surface of seat 5 or along the edge of the seat to ensure that the child does not slide forward when the multi-functional stroller is rocked, thereby improving the safety of the stroller.

[0058] A buffer spring 10 is installed between the carrier 1 and the chassis 3 to cushion the descent of the carrier 1. The seat 5 is also equipped with a guardrail 15 and a backrest to improve the safety of the stroller.

[0059] The front sides of the chassis 3 are provided with pin holes. The lower end of the rocker arm 4 is connected to the pin hole through a pin shaft to realize the pin connection between the lower end of the rocker arm 4 and the chassis 3. The bottom front end of the bearing body 1 is provided with an upper lug. The upper lug is located at the front end of the middle rib 101. The upper end of the rocker arm 4 is pin connected to the upper lug.

[0060] Crank 2 can be a rod-shaped crank, a fan-shaped crank, or a circular crank;

[0061] When the pin shaft of crank 2 is at its highest point, rocker arm 4 can be set at an angle or vertically; rocker arm 4 can be a straight rod, a curved rod, or an irregularly shaped rod.

[0062] Appendix Figure 7 The horizontal line located on the carrier 1 is not the simplified entire seat 5, but a portion of the seat 501. The horizontal distance D between the bottom pin axis of the rocker arm 4 and the axis of the crankshaft 9 ranges from 200mm to 400mm, and the vertical distance H between the top pin axis and the bottom pin axis of the rocker arm 4 ranges from 20mm to 340mm. By determining D and H within the above ranges, the geometric constraints formed between the crankshaft 9, the chassis 3, the rocker arm 4, and the carrier 1 are quantified.

[0063] The eccentricity of crank 2 is 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm or 60mm;

[0064] In one specific embodiment, the crank 2 eccentricity is 20mm, the horizontal distance D is 400mm, the vertical distance H is 20mm, and the maximum pitch angle θ of the seat surface is 0°.

[0065] In another specific embodiment, the crank 2 eccentricity is 20mm, the horizontal distance D is 400mm, the vertical distance H is 300mm, and the maximum pitch angle θ of the seat surface is 5.7°.

[0066] In another specific embodiment, the crank 2 eccentricity is 20mm, the horizontal distance D is 200mm, the vertical distance H is 168mm, and the maximum pitch angle θ of the seat surface is 11.3°.

[0067] In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 400mm, the vertical distance H is 310mm, and the maximum pitch angle θ of the seat surface is 8.7°.

[0068] In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 386mm, the vertical distance H is 320mm, and the maximum pitch angle θ of the seat surface is 8.8°.

[0069] In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 294mm, the vertical distance H is 204mm, and the maximum pitch angle θ of the seat surface is 11.6°.

[0070] In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 200mm, the vertical distance H is 120mm, and the maximum pitch angle θ of the seat surface is 17°.

[0071] In another specific embodiment, the crank 2 eccentricity is 50mm, the horizontal distance D is 400mm, the vertical distance H is 330mm, and the maximum pitch angle θ of the seat surface is 14.5°.

[0072] In another specific embodiment, the crank 2 eccentricity is 50mm, the horizontal distance D is 230mm, the vertical distance H is 120mm, and the maximum pitch angle θ of the seat surface is 25°.

[0073] In another specific embodiment, the crank 2 eccentricity is 50mm, the horizontal distance D is 200mm, the vertical distance H is 198mm, and the maximum pitch angle θ of the seat surface is 30°.

[0074] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 400mm, the vertical distance H is 340mm, and the maximum pitch angle θ of the seat surface is 17.5°.

[0075] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 350mm, the vertical distance H is 140mm, and the maximum pitch angle θ of the seat surface is 20°.

[0076] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 280mm, the vertical distance H is 132mm, and the maximum pitch angle θ of the seat surface is 25°.

[0077] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 230mm, the vertical distance H is 132mm, and the maximum pitch angle θ of the seat surface is 30°.

[0078] Furthermore, the top of the rocker arm 4 is located in front of the transverse through groove, which is more advantageous than being located at the bottom of the transverse through groove. This helps to reduce the rocking amplitude of the front end of the multi-functional trolley and increase the stability during rocking.

[0079] Working principle:

[0080] Based on the World Health Organization (WHO) standards for child growth, the standard height for 1-year-old boys is 76.0-81.0 cm, and for girls it is 74.0-80.0 cm; for 3-year-old boys it is 90.5-102.5 cm, and for girls it is 89.5-101.0 cm; and for 5-year-old boys it is 105.0-114.5 cm, and for girls it is 104.5-113.5 cm. Based on these figures, the stroller seat height should not be too high and should be appropriate for the child's height. Therefore, when the crankshaft 2 is at its highest point, the distance between the highest point of the seat 5 and the ground should be between 370 mm and 420 mm. Since the crankshaft is located under the seat, the crank dimensions need to be designed based on this data to ensure that the crank does not interfere with the ground or other components when rotating.

[0081] Under the above constraints, the length of crank 2 mainly determines the vertical undulation and swaying amplitude (i.e., pitch angle) of the carrier 1, and the horizontal distance D between the bottom pin of rocker arm 4 and crank shaft 9 mainly controls the swaying amplitude. In this utility model, whether the eccentricity is 60mm and the horizontal distance D is 230mm, or the eccentricity is 50mm and the horizontal distance D is 200mm, or the distance D is 20mm and the distance is 400mm, the stroller can achieve undulation and swaying within a safe and reasonable range, increasing the fun of children riding.

[0082] Example 2:

[0083] This embodiment is based on embodiment 1. A multifunctional children's stroller with a high-safety load-bearing body also includes a push handle 14, a drive wheel 6, a drive shaft 8, and a transmission mechanism 7.

[0084] The drive shaft 8 is rotatably mounted on the chassis 3. The drive wheel 6 is one of the rear wheels of the trolley, and the drive wheel 6 is coaxially connected to the drive shaft 8. The drive shaft 8 drives the crankshaft 9 and crank 2 to rotate through the transmission mechanism 7. The transmission mechanism 7 includes a driving wheel 71, a driven wheel 72, and a transmission component 73.

[0085] The push handle 14 is fixedly connected to the rear end of the chassis 3.

[0086] In addition, the crankshaft can be rotated by a motor and reduction gears.

[0087] Example 3:

[0088] This embodiment is based on embodiment 2, see appendix. Figure 8 The driving gear 71 is the driving gear, the driven gear 72 is the driven gear, and the transmission component 73 is the idler gear;

[0089] The driving gear is mounted on the drive shaft 8 via a long key, and the driving gear can move axially along the drive shaft 8; the driven gear is mounted on the crankshaft 9, and the driving gear and the driven gear mesh through an idler gear.

[0090] An idler gear carrier 74 is fitted onto the drive shaft 8, and an idler gear is rotatably mounted on the idler gear carrier 74; specifically, the idler gear is pin-connected to the idler gear carrier 74.

[0091] The idler gear frame 74 can rotate along the drive shaft 8 and / or move along the axial direction of the drive shaft 8. When changing the walking mode of the trolley, the idler gear frame 74 is turned or moved to make the idler gear engage or disengage with the driven gear.

[0092] Furthermore, several driven gears of different specifications can be installed on the crankshaft 9. By moving and rotating the idler gear carrier 74, the driving gear is moved synchronously, so that the idler gear meshes with the driven gears of different specifications, thereby changing the transmission ratio.

[0093] Example 4:

[0094] This embodiment is based on embodiment 2, see appendix. Figure 1 , 2 In addition to 9-11, a sliding sleeve 11 is also coaxially arranged on the drive shaft 8; a guide block 12 is fixedly arranged on the drive shaft 8, and a guide groove I111 is provided on the inner circumference of the sliding sleeve 11. The guide block 12 is located in the guide groove I111, so that the sliding sleeve 11 can slide along the drive shaft 8.

[0095] The drive wheel 71 is rotatably connected to the drive shaft 8 (i.e., the drive wheel 71 can rotate relative to the drive shaft 8 and can be connected by bearings); the drive wheel 71 is provided with a number of guide bosses 13 distributed along the circumference at one end facing the sliding sleeve 11, and the sliding sleeve 11 is provided with a number of guide grooves II 112 distributed along the circumference at one end facing the drive wheel 71. The length direction of both the guide bosses 13 and the guide grooves II 112 is along the axial direction, and the guide bosses 13 can be matched with the guide grooves II 112 one by one.

[0096] Driven wheel 72 is coaxially fixed on crankshaft 9, and driving wheel 71 and driven wheel 72 are driven by transmission component 73;

[0097] By disengaging or engaging the drive wheel 71 with the sliding sleeve 11, the synchronous rotation of the drive wheel 71 and the drive shaft 8 can be controlled, thereby switching between rocking mode and flat running mode. Furthermore, the sliding sleeve 11 can be moved by a lever.

[0098] Furthermore, several guide grooves II112 are provided on the inner circumference of the sleeve 11, and guide bosses 13 are provided on the outer circumference of the drive wheel 71 facing the sleeve 11.

[0099] Furthermore, the driving pulley 71 is a driving pulley, the driven pulley 72 is a driven pulley, the transmission component 73 and the transmission mechanism 7 are belts, and the outer diameter of the driving pulley is smaller than the outer diameter of the driven pulley;

[0100] Alternatively, the driving gear 71 is the driving gear, the driven gear 72 is the driven gear, the transmission component 73 is the idler gear carrier 74 and the idler gear, and the outer diameter of the driving gear is smaller than the outer diameter of the driven gear.

[0101] Alternatively, the driving sprocket 71 can be a driving sprocket, the driven sprocket 72 can be a driven sprocket, the transmission component 73 can be a chain, and the outer diameter of the driving sprocket can be smaller than the outer diameter of the driven sprocket.

[0102] Example 5:

[0103] This embodiment is based on embodiment 2. A clutch mechanism is provided on the drive wheel 6. The clutch mechanism controls the drive wheel 6 to rotate synchronously or disengage from the drive shaft 8. The clutch mechanism can adopt the structure disclosed in patent 200810062430.0.

[0104] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multifunctional children's stroller with a high-safety support body, comprising a crankshaft, a frame, a crank, a support body, and a rocker arm; the crankshaft is rotatably mounted on the frame, and can rotate when the stroller is pushed; one end of the crank is fixedly connected to the crankshaft, and the other end is pinned to the support body; the bottom end of the rocker arm is pinned to the frame; the top end of the rocker arm is pinned to the bottom front end of the support body; characterized in that, The support body is a shell structure; the top of the support body is recessed to form a transverse through groove, and a central rib is fixedly connected in the transverse through groove. The central rib is set along the longitudinal center line of the support body. The front end of the central rib is fixedly connected to the front wall of the transverse through groove, the bottom end is fixedly connected to the bottom of the transverse through groove, and the rear end is fixedly connected to the rear wall of the transverse through groove.

2. The multifunctional child stroller with a high-safety support structure as described in claim 1, characterized in that, A seat is provided on the carrier; the seat is located on top of the carrier and behind the transverse through slot, and the crankshaft is located below the seat; When the crank pin axis is at its highest point, the vertical distance H between the top and bottom pin axes of the rocker arm is greater than or equal to the crank's eccentricity. The crank eccentricity ranges from 20mm to 60mm, and the maximum pitch angle θ of the seat surface ranges from 0° to 30°.

3. The multifunctional child stroller with a high-safety support structure as described in claim 2, characterized in that, The horizontal distance D between the bottom pin axis of the rocker arm and the axis of the crankshaft ranges from 200mm to 400mm, and the vertical distance H between the top pin axis and the bottom pin axis of the rocker arm ranges from 20mm to 340mm.

4. A multi-functional child stroller with a high-safety load-bearing body as described in any one of claims 1-3, characterized in that, The top of the rocker arm is located in front of the axial through groove, where the pin joint of the rocker arm and the carrier body are located.

5. A multifunctional child stroller with a high-safety load-bearing body as described in any one of claims 1-3, characterized in that, The bottom part of the transverse through groove located on both sides of the central rib forms two pedals, and a connecting plate is fixedly connected between the two pedals.

6. A multifunctional child stroller with a high-safety load-bearing body as described in any one of claims 1-3, characterized in that, The top surface of the central rib is curved, and the center line of the curved surface is an arc-shaped center line. The lowest point of the arc-shaped center line is lower than the height of the top surface of the seat.

7. A multifunctional child stroller with a high-safety load-bearing structure as described in claim 6, characterized in that, The width of the central rib gradually decreases from bottom to top.

8. A multifunctional child stroller with a high-safety support structure as described in any one of claims 1-3, characterized in that, A handrail is provided at the top front end of the central rib.

9. A multifunctional child stroller with a high-safety support structure as described in any one of claims 1-3, characterized in that, The seat top surface is provided with a protrusion, which is located at the front end of the seat top surface or along the edge of the seat.

10. A multifunctional child stroller with a high-safety support structure as described in claim 2 or 3, characterized in that, It also includes drive wheels, drive shafts, and transmission mechanisms; The drive shaft is rotatably mounted on the chassis, and the drive wheel is one of the rear wheels of the rocking horse, with the drive wheel coaxially connected to the drive shaft; The drive shaft drives the crankshaft and crank to rotate through a transmission mechanism to reduce speed.

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