Multifunctional baby stroller

Abstract

The utility model discloses a multifunctional child stroller which comprises a crankshaft, a stroller underframe, a crank, a bearing body and a rocker. One end of the crank is fixedly connected with the crankshaft, and the other end of the crank is in pin joint with the bearing body; the bottom end of the rocker is in pin joint with the vehicle underframe, and the top end is in pin joint with the bearing body; a seat is arranged on the bearing body; the crank shaft is positioned below the seat; when the pin joint axis of the crank is the highest, the vertical distance H between the top pin joint axis and the bottom pin joint axis of the rocker is greater than or equal to the eccentric distance of the crank; the eccentric distance of the crank ranges from 20 mm to 60 mm, and the maximum pitch angle theta of the seat face of the seat 5 ranges from 0 degree to 30 degrees. On the premise that interestingness of the cart is kept, safety and comfort of the cart are further guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of children's vehicle technology, specifically relating to a multifunctional children's stroller. 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 "new type of stroller with dynamic and flat walking" disclosed in Chinese patent CN101492066A. This stroller uses the mechanical linkage of crankshafts, connecting rods, and the support body to transform the translational motion of the wheels into the undulating and swaying motion of the support body, realizing the switching between flat walking mode and dynamic mode, thus enhancing the riding pleasure for infants and toddlers.

[0003] However, this existing technology still has the following drawbacks. In dynamic mode, the eccentricity of the crank (i.e., the crank's rotation radius) directly affects the range of motion of the carrier. If the eccentricity is too large and the pitch angle of the carrier is too large, it can easily cause infants and young children to fall, and there is a risk of tipping over when turning or on bumpy roads. At the same time, a large design space needs to be made in small children's strollers, such as increasing the seat height to avoid interference between the crank and the ground; however, the seat height cannot be too high in order to adapt to the child's height. If the eccentricity is too small, the range of motion is insufficient, making it difficult to achieve the effect of simulating horseback riding, thus reducing the fun of dynamic mode. Utility Model Content

[0004] In view of this, the present invention provides a multifunctional children's stroller that, while retaining the fun of strolling, further ensures the safety and comfort of the stroller.

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

[0006] A multi-functional children's stroller includes a crankshaft, a frame, a crank, a support body, and a rocker arm;

[0007] The crankshaft is rotatably mounted on the chassis. One end of the crank is fixedly connected to the crankshaft, and the other end is pinned to the carrier. The bottom end of the rocker arm is pinned to the chassis, and the top end is pinned to the carrier.

[0008] A seat is mounted on the carrier; the crankshaft is located below the seat;

[0009] 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.

[0010] The crank eccentricity ranges from 20mm to 60mm, and the maximum pitch angle θ of the seat surface ranges from 0° to 30°.

[0011] 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.

[0012] Furthermore, the vertical projection length H of the distance between the top pin axis and the bottom pin axis of the rocker arm ranges from 20mm to 340mm.

[0013] Furthermore, a buffer spring is installed between the load-bearing body and the chassis.

[0014] Furthermore, it also includes drive wheels, drive shafts, and transmission mechanisms;

[0015] 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.

[0016] Furthermore, the driving wheel is a driving gear, the driven wheel is a driven gear, and the transmission component is an idler gear;

[0017] The driving gear is mounted on the drive shaft via a long key and can move axially along the drive shaft; the driven gear is mounted on the crankshaft, and the driving gear and the driven gear mesh with an idler gear.

[0018] An idler gear carrier is fitted onto the drive shaft, and the idler gear is rotatably mounted on the idler gear carrier.

[0019] The idler gear frame can rotate along the drive shaft or move along the axial direction of the drive shaft. When changing the walking mode of the rocking horse, the idler gear frame is turned or moved to engage or disengage the idler gear with the driven gear.

[0020] Furthermore, a sliding sleeve is coaxially mounted on the drive shaft; a guide block is fixedly mounted on the drive shaft, and a guide groove I is provided on the inner circumference of the sliding sleeve. The guide block is located in the guide groove I, so that the sliding sleeve can slide along the drive shaft.

[0021] The drive wheel is rotatably connected to the drive shaft.

[0022] The end of the drive wheel facing the sliding sleeve is provided with several guide bosses distributed along the circumference, and the end of the sliding sleeve facing the drive wheel is provided with several guide grooves II distributed along the circumference. The length direction of both the guide bosses and the guide grooves II is along the axial direction, and the guide bosses can be matched with the guide grooves II one by one.

[0023] The driven wheel is coaxially fixed on the crankshaft, and the driving wheel and the driven wheel are driven by a transmission component;

[0024] When changing the way the rocking horse moves, move the sliding sleeve to engage or disengage it from the drive wheel.

[0025] Furthermore, a clutch mechanism is provided on the drive wheel to control the synchronous rotation or disengagement of the drive wheel from the drive shaft.

[0026] Beneficial effects:

[0027] (1) The multifunctional children's stroller provided by this utility model ensures that the stroller's movement range is moderate and prevents excessive swaying by simultaneously limiting the eccentricity of the crank and the pitch angle of the carrier. It can produce obvious undulations, enhance the fun, and not be too violent, thus ensuring the safety and comfort of infants and young children.

[0028] (2) The crankshaft, chassis, rocker and carrier form a crank-rocker structure or 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 and the axis of the crankshaft has a great influence on the pitch angle. The present invention sets the range of the above horizontal distance D to 200mm~400mm to facilitate the design of the pitch angle.

[0029] (3) The vertical projection length H of the rocker arm of this utility model is in the range of 20mm~340mm. The geometric constraints formed between the crankshaft, the chassis, the rocker arm and the carrier are quantified, which facilitates the overall design of the trolley.

[0030] (4) A buffer spring is provided between the carrier and the chassis of the vehicle to buffer the descent of the carrier.

[0031] (5) The end of the drive wheel facing the slide sleeve II of this utility model is provided with a number of guide bosses distributed along the circumference, and the end of the slide sleeve II facing the drive wheel is provided with a number of guide grooves II distributed along the circumference, which can realize the smooth cooperation between the slide sleeve II and the drive wheel, and the number of guide bosses and grooves are in contact and slide, and the force is uniform. Attached Figure Description

[0032] Figure 1 This is a structural diagram of the trolley of this utility model (the load-bearing body is not shown);

[0033] Figure 2 This is a simplified diagram of the crank-rocker structure of this utility model;

[0034] Figure 3 This is an example diagram of a transmission mechanism according to the present invention;

[0035] Figure 4 The structure of the sliding sleeve of this utility model Figure I ;

[0036] Figure 5 The structure of the sliding sleeve of this utility model Figure II ;

[0037] Figure 6This is an example diagram showing the connection relationship between the drive shaft and the drive wheel of this utility model.

[0038] Among them, 1-carrier, 2-crank, 3-car chassis, 4-rocker, 5-seat, 501-part of seat, 6-drive wheel, 7-transmission mechanism, 71-drive wheel, 72-driven wheel, 73-transmission component, 74-idler wheel frame, 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. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Example 1:

[0041] This embodiment provides a multifunctional children's stroller; see attached document. Figure 1 and 2 It includes crankshaft 9, chassis 3, crank 2, carrier 1 and rocker arm 4;

[0042] 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, and the top end is pinned to the carrier 1.

[0043] A seat 5 is mounted on the carrier 1; a crankshaft 9 is located below the seat 5.

[0044] 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.

[0045] The eccentricity of crank 2 ranges from 20mm to 60mm, and the maximum pitch angle θ of seat 5 ranges from 0° to 30°.

[0046] This embodiment provides a multifunctional children's stroller with an eccentricity range of 20mm to 60mm for the crank 2 and a maximum elevation angle range of 0° to 30°. This ensures that the stroller's range of motion is moderate and prevents excessive swaying. It can produce a noticeable undulating sensation to enhance the fun without being too violent, thus ensuring the safety and comfort of infants and young children.

[0047] 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.

[0048] 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.

[0049] The eccentricity is the distance between the pin connection axis of crank 2 and bearing 1 and the axis of crankshaft 9;

[0050] Appendix Figure 3 The horizontal line 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.

[0051] The eccentricity of crank 2 is 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm or 60mm;

[0052] In one specific embodiment, the crank 2 eccentricity is 20mm, the horizontal distance D is 400mm, the projected length H is 20mm, and the maximum pitch angle θ of the seat surface is 0°.

[0053] In another specific embodiment, the crank 2 eccentricity is 20mm, the horizontal distance D is 400mm, the projected length H is 300mm, and the maximum pitch angle θ of the seat surface is 5.7°.

[0054] In another specific embodiment, the crank 2 eccentricity is 20mm, the horizontal distance D is 200mm, the projected length H is 168mm, and the maximum pitch angle θ of the seat surface is 11.3°.

[0055] In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 400mm, the projected length H is 310mm, and the maximum pitch angle θ of the seat surface is 8.7°.

[0056] In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 386mm, the projected length H is 320mm, and the maximum pitch angle θ of the seat surface is 8.8°.

[0057] In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 294mm, the projected length H is 204mm, and the maximum pitch angle θ of the seat surface is 11.6°.

[0058] In another specific embodiment, the crank 2 eccentricity is 30mm, the horizontal distance D is 200mm, the projected length H is 120mm, and the maximum pitch angle θ of the seat surface is 17°.

[0059] In another specific embodiment, the crank 2 eccentricity is 50mm, the horizontal distance D is 400mm, the projected length H is 330mm, and the maximum pitch angle θ of the seat surface is 14.5°.

[0060] In another specific embodiment, the crank 2 eccentricity is 50mm, the horizontal distance D is 230mm, the projected length H is 120mm, and the maximum pitch angle θ of the seat surface is 25°.

[0061] In another specific embodiment, the crank 2 eccentricity is 50mm, the horizontal distance D is 200mm, the projected length H is 198mm, and the maximum pitch angle θ of the seat surface is 30°.

[0062] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 400mm, the projected length H is 340mm, and the maximum pitch angle θ of the seat surface is 17.5°.

[0063] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 350mm, the projected length H is 140mm, and the maximum pitch angle θ of the seat surface is 20°.

[0064] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 280mm, the projected length H is 132mm, and the maximum pitch angle θ of the seat surface is 25°.

[0065] In another specific embodiment, the crank 2 eccentricity is 60mm, the horizontal distance D is 230mm, the projected length H is 132mm, and the maximum pitch angle θ of the seat surface is 30°.

[0066] Pin holes are provided on both sides of the front of the chassis 3. The lower end of the rocker arm 4 is connected to the pin hole through a pin shaft to achieve pin connection between the lower end of the rocker arm 4 and the chassis 3. The bearing body 1 is provided with an upper lug, and the upper end of the rocker arm 4 is pin connected to the upper lug.

[0067] Crank 2 can be a rod-shaped crank, a fan-shaped crank, or a circular crank;

[0068] 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.

[0069] A buffer spring 10 is installed between the carrier 1 and the chassis 3 to buffer the descent of the carrier 1.

[0070] The seats can be equipped with guardrails and backrests to ensure children's safety.

[0071] Working principle:

[0072] The stroller seat height should not be too high and should be adapted to the child's height. Therefore, when the pin shaft of crank 2 is at its highest point, the distance between the highest point of the seat 5 and the ground should be between 370mm and 420mm. Since the crank shaft is located under the seat, the crank size needs to be designed based on this data to ensure that the crank does not interfere with the ground or other components when rotating.

[0073] 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 for children to ride.

[0074] Example 2:

[0075] This embodiment is based on embodiment 1. A multifunctional children's stroller also includes a push handle, a drive wheel 6, a drive shaft 8, and a transmission mechanism 7.

[0076] 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.

[0077] The push handle is fixedly connected to the rear end of the chassis 3.

[0078] In addition, the crankshaft can be rotated by a motor and reduction gears.

[0079] Example 3:

[0080] This embodiment is based on embodiment 2, see appendix. Figure 3 The driving wheel 71 is the driving gear, the driven wheel 72 is the driven gear, and the transmission component 73 is the idler gear;

[0081] 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 72 is mounted on the crankshaft 9, and the driving gear and the driven gear 72 mesh with an idler gear.

[0082] 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.

[0083] 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 72.

[0084] Furthermore, several driven gears 72 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 72 of different specifications, thereby changing the transmission ratio.

[0085] Example 4:

[0086] This embodiment is based on embodiment 2, see appendix. Figure 1 and 4 -6. 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. 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.

[0087] 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.

[0088] Driven wheel 72 is coaxially fixed on crankshaft 9, and driving wheel 71 and driven wheel 72 are driven by transmission component 73;

[0089] 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.

[0090] 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.

[0091] Furthermore, the driving pulley 71 is a driving pulley, the driven pulley 72 is a driven pulley, the transmission mechanism 7 is a belt, and the outer diameter of the driving pulley is smaller than the outer diameter of the driven pulley;

[0092] Alternatively, the driving wheel 71 is the driving gear, the driven wheel 72 is the driven gear, the transmission mechanism 7 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.

[0093] Alternatively, the driving sprocket 71 can be a driving sprocket, the driven sprocket 72 can be a driven sprocket, the transmission mechanism 7 can be a chain, and the outer diameter of the driving sprocket can be smaller than the outer diameter of the driven sprocket.

[0094] Example 5:

[0095] 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.

[0096] 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, characterized in that, Includes crankshaft, chassis, crank, carrier, and rocker arm; The crankshaft is rotatably mounted on the chassis. One end of the crank is fixedly connected to the crankshaft, and the other end is pinned to the carrier. The bottom end of the rocker arm is pinned to the chassis, and the top end is pinned to the carrier. A seat is mounted on the carrier; 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°.

2. The multifunctional stroller as described in claim 1, 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.

3. A multifunctional children's stroller as described in claim 1 or 2, characterized in that, The vertical projection length H of the distance between the top pin axis and the bottom pin axis of the rocker arm ranges from 20mm to 340mm.

4. A multifunctional children's stroller as described in claim 1 or 2, characterized in that, A buffer spring is installed between the load-bearing body and the chassis.

5. A multifunctional children's stroller as described in claim 1 or 2, characterized in that, It also includes drive wheels, drive shafts, and transmission mechanisms; 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.

6. The multifunctional stroller as described in claim 5, characterized in that, The driving wheel is a driving gear, the driven wheel is a driven gear, and the transmission component is an idler gear; The driving gear is mounted on the drive shaft via a long key and can move axially along the drive shaft; the driven gear is mounted on the crankshaft, and the driving gear and the driven gear mesh with an idler gear. An idler gear carrier is fitted onto the drive shaft, and the idler gear is rotatably mounted on the idler gear carrier. The idler gear frame can rotate along the drive shaft or move axially along the drive shaft. When changing the walking mode of the rocking horse, the idler gear frame is turned or moved to engage or disengage the idler gear with the driven gear.

7. A multifunctional children's stroller as described in claim 5, characterized in that, A sliding sleeve is also coaxially mounted on the drive shaft; a guide block is fixedly mounted on the drive shaft, and a guide groove I is provided on the inner circumference of the sliding sleeve. The guide block is located in the guide groove I, so that the sliding sleeve can slide along the drive shaft. The drive wheel is rotatably connected to the drive shaft. The end of the drive wheel facing the sliding sleeve is provided with several guide bosses distributed along the circumference, and the end of the sliding sleeve facing the drive wheel is provided with several guide grooves II distributed along the circumference. The length direction of both the guide bosses and the guide grooves II is along the axial direction, and the guide bosses can be matched with the guide grooves II one by one. The driven wheel is coaxially fixed on the crankshaft, and the driving wheel and the driven wheel are driven by a transmission component; When changing the way the rocking horse moves, move the sliding sleeve to engage or disengage it from the drive wheel.

8. The multifunctional stroller as described in claim 5, characterized in that, The drive wheel is equipped with a clutch mechanism to control the synchronous rotation or disengagement of the drive wheel from the drive shaft.

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