A multifunctional child stroller

Abstract

The utility model discloses a multifunctional children's pushchair, including adjustable backrest and seat positioning mechanism, this multifunctional children's pushchair not only provided more flexible, convenient backrest inclination adjustment, more important is introduced the independent adjustable function of the inclination of the fence, and can realize the high cooperation of backrest and fence angle adjustment, simultaneously, through to the seat realizes the positionable, guarantees the stability of seat under the flat walk mode and stationary mode.

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] Strollers have become an indispensable tool in modern family childcare. Their main function is to provide a safe and comfortable riding environment for infants and toddlers, while also making it convenient for caregivers to push and move them. An ideal stroller should be able to adapt to the needs of infants and toddlers at different developmental stages, in different activity states (such as sleeping, sitting and playing, and observing the environment), and in different usage scenarios.

[0003] Most strollers on the market are equipped with adjustable backrest angles to meet the different needs of infants and toddlers when they are sleeping (requiring a large angle of inclination or even lying flat) or awake and sitting (requiring a relatively upright posture).

[0004] Common adjustment methods include: multi-position latch adjustment and stepless adjustment (some high-end products);

[0005] Existing problems:

[0006] Poor ease of operation: Some adjustment mechanisms are relatively cumbersome to operate, especially when one-handed operation is required or when adjustments are made during the push-out process, making operation and adjustment inconvenient.

[0007] Poor adaptability: A few fixed angles may not perfectly fit the body shape, preferences, or special needs of all infants and young children.

[0008] Stroller rails primarily serve a safety function, preventing infants and toddlers from slipping or tipping forward. Traditional rail designs typically include:

[0009] Fixed angle: Most of the railings and trolley cabin frames are rigidly connected or can only be opened and closed as a whole (U-shaped or T-shaped), and their tilt angle relative to the bottom of the cabin is fixed.

[0010] Existing problems:

[0011] The contradiction between ease of entry and exit and comfort: While fixed upright fences offer good protection, they can easily trap the legs of infants and toddlers when being taken out or put in, especially for older or more active children, causing inconvenience and even resistance from the child; while lowering or completely removing the fence makes entry and exit easier, it sacrifices safety and cannot provide effective protection when pushing the child around.

[0012] Poor coordination with backrest angle: When the backrest is adjusted to a semi-reclining or flat position, the fixed upright railing may appear too high or in an unsuitable position, failing to provide optimal lateral support and a sense of envelopment for the lying infant, thus affecting comfort; or, when the child wants to sit upright to observe, the railing may be too low or too tilted, failing to provide effective front blocking and handrail functions.

[0013] Lack of adaptability: Fixed-angle railings cannot adapt to changes in an infant's sitting posture (caused by backrest adjustment) or individual body size differences to achieve the optimal balance between protection and comfort.

[0014] In summary, while existing strollers have achieved basic backrest angle adjustment, there is still room for improvement in terms of flexibility, precision, and convenience. More importantly, current technologies generally neglect the adjustability of the railing angle and its synergistic relationship with backrest angle adjustment. Fixed-angle railings have significant drawbacks in addressing different backrest angles, different usage scenarios (entry / exit or pushing with protective folding), and different needs of infants and toddlers, making it difficult to balance convenience, comfort, and safety.

[0015] Meanwhile, the existing multi-functional stroller (CN101492066A) has no fixed position of the crank, which causes the seat on the carrier to suddenly drop when a child sits in the stroller, resulting in low seat stability during the push. Utility Model Content

[0016] In view of this, the present invention provides a multifunctional children's stroller, which not only provides more flexible and convenient backrest tilt adjustment, but more importantly, introduces an independent adjustable function for the railing tilt, and can achieve high coordination between the backrest and railing angle adjustment; at the same time, by making the seat positionable, the stability of the seat is ensured in both horizontal and static modes.

[0017] This utility model is achieved through the following technical solution:

[0018] A multi-functional children's stroller includes an adjustable backrest and a seat positioning mechanism;

[0019] The adjustable backrest includes the backrest body, brake cable, and limit seat;

[0020] The backrest body has a guide groove at the top, and a lever is installed in the guide groove. The lever can slide up and down along the guide groove. There is a backrest adjustment slot on each of the two inner sides at the bottom of the backrest body. A mounting seat I is rotatably installed in each backrest adjustment slot. The two ends of the brake cable are respectively connected to the lever and the mounting seat I. When the lever is slid upward, the mounting seat I can rotate.

[0021] Mounting seat I is equipped with gear position adjuster I. The backrest adjustment slot and gear position adjuster I are engaged by an inclined surface. The limit seat limits the gear position adjuster I. When the mounting seat I is pulled, the mounting seat I can be disengaged from the backrest adjustment slot.

[0022] The seat positioning mechanism is used to position the seat or to put the trolley in a rocking state.

[0023] Preferably, it also includes an adjustable fence;

[0024] The adjustable fence includes the fence body, spring II, gear adjuster II, and button;

[0025] Mounting base II is installed on the two opposite outer sides of the backrest body, which includes a guide post and a railing adjustment slot. Spring II is sleeved on the guide post, and gear adjuster II is installed in the railing adjustment slot and presses against spring II.

[0026] The fence body has mounting covers at both ends. One end of the cover is snapped onto the outer periphery of the gear adjuster II and fitted onto the inner periphery of the mounting base II. The other end is fitted with a button. The button passes through the mounting cover, abuts against the gear adjuster II, and is located outside the gear adjuster II.

[0027] Preferably, the angle between the backrest body and the seat is 110° or 140°, and the railing body is horizontal with the seat.

[0028] Preferably, a pressure block is installed in the guide groove to limit the gripper in the guide groove.

[0029] Preferably, the seat positioning mechanism includes a housing, a spring I, a sliding sleeve I, and a lever;

[0030] Sleeve I is coaxially sleeved on the crankshaft and adjacent to the driven wheel; Spring I is coaxially positioned on the side of sleeve I away from the driven wheel and abuts against sleeve I.

[0031] The housing is provided with a sliding groove, which is arranged axially along the crankshaft; the sliding sleeve I is provided with a slider, which is located inside the sliding groove;

[0032] The housing has a through hole, through which the lever passes. The part of the lever inside the housing is hinged to the housing. The lever also has a protrusion I and a groove I on the sliding sleeve I. The protrusion I and the groove I are in a convex-concave fit. A locking groove is provided below the through hole and communicates with it.

[0033] When the lever is in the locking groove, spring I is compressed, the sliding sleeve I is disengaged from the driven wheel, and the multi-functional stroller is rocking.

[0034] When the lever disengages from the locking groove, the lever can rotate along the hinge axis. Under the action of the spring force of spring I, the sliding sleeve I engages with the driven wheel to achieve seat positioning of the multi-functional children's stroller.

[0035] Preferably, the driven wheel is provided with a limiting boss, and the sliding sleeve I is provided with a limiting groove. When the limiting groove and the limiting boss cooperate, the seat is positioned.

[0036] Preferably, the through hole includes a first hole segment and a second hole segment that are connected. The height of the second hole segment is greater than the height of the first hole segment, so that a corner is formed between the first hole segment and the second hole segment. A protrusion III extending towards the end of the second hole segment is provided at the corner. The protrusion III and the sidewall of the adjacent second hole segment form the locking groove.

[0037] Preferably, the protrusion I is disposed at one end of the lever located inside the housing; the hinge axis between the lever and the housing is disposed adjacent to the protrusion I; wherein, the other end of the lever is a handle.

[0038] Preferably, the thickness of the lever at the hinge axis is greater than the thickness of the handle.

[0039] Preferably, it also includes: a load-bearing body, rear wheels, a chassis, a sway structure, and a clutch mechanism;

[0040] The swing structure is set between the front of the carrier and the vehicle chassis. The upper end of the swing structure is pinned to the carrier and the lower end is pinned to the vehicle chassis.

[0041] The drive shaft is rotatably mounted on the chassis, with two rear wheels located at both ends of the drive shaft, one of which serves as the drive wheel; the drive wheel is coaxially and fixedly connected to the drive shaft.

[0042] A drive wheel is also coaxially mounted on the drive shaft, and the drive wheel and the driven wheel are driven by a transmission mechanism;

[0043] The clutch mechanism is used to control whether or not transmission occurs between the driving wheel and the driven wheel.

[0044] Beneficial effects:

[0045] (1) The multifunctional stroller provided by this utility model can provide more flexible and convenient backrest tilt adjustment (the backrest body is adjusted forward for easy transportation and rearward for easy lying down). At the same time, the seat positioning mechanism can position the seat or make the stroller in a rocking state, which can ensure the stability of the seat in flat walking mode and stationary mode.

[0046] (2) This utility model introduces an independent adjustable function for the tilt of the fence and can achieve high coordination between the angle adjustment of the backrest body and the fence body. This design facilitates transportation and will significantly improve the overall comfort and safety of infants and young children, as well as the convenience of caregivers, and better meet diverse usage needs.

[0047] (3) The multifunctional children's stroller provided by this utility model combines ergonomics and sets the angle between the backrest body and the seat to 110° or 140°, while the railing body and the seat are horizontal, which helps to significantly improve the comfort and safety of children riding.

[0048] (4) The seat positioning mechanism of this utility model, through the setting and cooperation of spring I, sliding sleeve I and lever, can limit and fix the seat in the flat walking mode or in the stationary mode (when children get on and off the car), so as to ensure the stability of the seat.

[0049] (5) When the limiting groove and the limiting boss are engaged, the seat is horizontal, which can ensure that the seat is positioned in a horizontal position to ensure the comfort of children.

[0050] (6) When it is necessary to release the seat positioning, the lever only needs to be moved away from the locking groove and made parallel to the first hole section. The lever will automatically enter the first hole section under the action of spring I. When it is necessary to position the seat, the lever only needs to be moved to the position of the second hole section parallel to the locking groove. The lever will automatically enter the locking groove under the action of spring I, which makes it convenient for adults to adjust the seat position.

[0051] (7) The protrusion I of this utility model is set at the end of the first end of the lever located inside the housing; the hinge shaft between the lever and the housing is set adjacent to the protrusion I, the lever arm is longer, and it is easier to move the lever.

[0052] (8) The thickness of the hinge shaft of the lever is greater than the thickness of the handle. The greater thickness of the hinge shaft can ensure the hinge strength between the lever and the housing. The smaller thickness of the handle can realize the elastic deformation of the handle, making it smoother when the handle is locked into or removed from the locking groove. Attached Figure Description

[0053] Figure 1 This is a structural diagram of the horizontal positioning mechanism of this utility model;

[0054] Figure 2 This is a schematic diagram of the structure of the shell of this utility model;

[0055] Figure 3 This is a structural diagram of the driven gear of this utility model;

[0056] Figure 4 This is the structure of the sliding sleeve I of this utility model. Figure I ;

[0057] Figure 5 This is the structure of the sliding sleeve I of this utility model. Figure II ;

[0058] Figure 6 This is a structural diagram of the through hole in this utility model;

[0059] Figure 7 This is the front view of the lever of this utility model;

[0060] Figure 8 This is a left view of the lever of this utility model;

[0061] Figure 9 This is the structure of the sliding sleeve II of this utility model. Figure I ;

[0062] Figure 10 This is the structure of the sliding sleeve II of this utility model. Figure II ;

[0063] Figure 11 This is an example diagram of the drive shaft and drive wheel of this utility model;

[0064] Figure 12 This is a schematic diagram of the overall structure of a multifunctional children's stroller according to this utility model;

[0065] Figure 13 yes Figure 12 A schematic diagram of the adjustable backrest structure;

[0066] Figure 14 It is a partial exploded view of the adjustable backrest;

[0067] Figure 15 yes Figure 12 A schematic diagram of the adjustable fence structure.

[0068] Among them, 1-crankshaft, 2-spring I, 3-sliding sleeve I, 31-limiting groove, 32-slider, 33-groove I, 34-circular groove I, 4-driven wheel, 41-limiting boss, 5-crankshaft, 6-transmission mechanism, 7-drive wheel, 8-lever, 81-protrusion I, 82-pin hole, 83-handle, 84-protrusion II, 9-drive wheel, 10-pin, 11-limiting component, 12-sliding groove, 13-fixed seat, 14-drive shaft, 15-through hole, 151-protrusion III, 15 2-Locking groove, 16-Sliding sleeve II, 161-Guide groove I, 162-Guide groove II, 163-Groove II, 17-Housing, 18-Guide block, 19-Guide boss, 20-Adjustable backrest, 201-Hand lever, 202-Mounting base I, 203-Gear adjuster I, 204-Limit seat, 205-Backrest adjustment slot, 21-Adjustable railing, 211-Mounting base II, 212-Spring II, 213-Gear adjuster II, 214-Mounting cover, 215-Button. Detailed Implementation

[0069] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0070] Example 1:

[0071] This embodiment provides a seat positioning mechanism for a multi-functional stroller, such as... Figure 1 As shown, the crank 5 and driven wheel 4 of the multi-functional stroller are both fixedly connected to the crank shaft 1. The crank 5 is pin-connected to the carrier of the multi-functional stroller. The seat is located on the carrier. When the driven wheel 4 rotates, it will cause the carrier to shake.

[0072] like Figure 1 and Figure 2 As shown, the seat positioning mechanism includes a housing 17, a spring I2, a sliding sleeve I3, and a lever 8; the housing 17 is the housing of the seat;

[0073] Sliding sleeve I3 is coaxially sleeved on crankshaft 1 and adjacent to driven wheel 4; spring I2 is coaxially limited on the side of sliding sleeve I3 away from driven wheel 4 and abuts against sliding sleeve I3;

[0074] A sliding groove 12 is provided on the housing 17, and the sliding groove 12 is arranged along the axial direction of the crank shaft 1; for example Figure 4 As shown, a slider 32 is provided on the sliding sleeve I3. The slider 32 is located in the sliding groove 12, so that the sliding sleeve I3 can slide along the crank shaft 1 axial direction.

[0075] The housing 17 is also provided with a through hole 15, through which the lever 8 passes. The direction of movement of the lever 8 in the through hole 15 is parallel to the axial direction of the crank shaft 1. Figure 7 As shown, one end of the lever 8 is provided with a protrusion I 81, and the other end is provided with a handle 83. The end of the lever 8 with the protrusion I 81 is located inside the housing 17 and is hinged to the housing 17; as Figure 4 As shown, the sliding sleeve I3 is provided with a groove I33, and the protrusion I81 is in concave-convex fit with the groove I33;

[0076] like Figure 6 As shown, the housing 17 below the through hole 15 is provided with a locking groove 152 that communicates with the through hole 15. When the handle 83 of the lever 8 is located in the locking groove 152, the lever 8 is limited and locked, and cannot rotate around the hinge axis. At this time, the protrusion I81 on the lever 8 presses the spring I2 through the sliding sleeve I3. The spring I2 is in a compressed state, the sliding sleeve I3 is disengaged from the driven wheel 4, and the multi-functional children's stroller is in a rocking state.

[0077] When the handle 83 of the lever 8 disengages from the locking groove 152, it can slide along the through hole 15 to the end away from the locking groove 152, thereby causing the end of the lever 8 where the protrusion I 81 is located to rotate along the hinge axis, pushing the sliding sleeve I 3 to move in the direction of the driven wheel 4. Under the elastic force of the spring I 2, the sliding sleeve I 3 cooperates with the driven wheel 4 to achieve the seat positioning of the multi-functional children's stroller.

[0078] This embodiment provides a seat positioning mechanism for a multi-functional stroller, which can position the seat in flat walking mode or when the child gets in and out of the stroller to ensure the stability of the seat.

[0079] Furthermore, such as Figure 3 As shown, one or more limit bosses 41 can be provided on the driven wheel 4, such as... Figure 4 As shown, the sliding sleeve I3 is provided with one or more upper limit grooves 31; or the driven gear is provided with one or more upper limit grooves 31, and the sliding sleeve I3 is provided with one or more upper limit bosses 41; so that the seat can be positioned in more than one position during the rocking process.

[0080] In a specific embodiment, such as Figure 3 and Figure 4 The driven wheel 4 is provided with a limiting boss 41, and the sliding sleeve I3 is provided with a limiting groove 31; this ensures that the seat is positioned in only one position during rocking. Furthermore, when the limiting groove 31 and the limiting boss 41 engage under the action of the spring I2, the seat is horizontal. This ensures that the seat is positioned horizontally, guaranteeing the comfort of the child.

[0081] In addition, the seat can be positioned at other angles.

[0082] In addition, a limiting groove 31 can be provided on the driven wheel 4, and a limiting boss 41 can be provided on the sliding sleeve I3.

[0083] The groove I33 can be an annular groove coaxial with the sliding sleeve I3, or it can be a coaxial arc groove, a circular groove extending radially, a square groove, or other polygonal grooves.

[0084] A limiting component 11 is also coaxially fixedly connected to the crank shaft 1. One end of the spring I2 abuts against the limiting component 11, and the other end abuts against the sliding sleeve I3. The limiting component 11 can be connected to the crank shaft 1 by screws, bolts, snap-fit, or rotation.

[0085] like Figure 5 As shown, the side of the sliding sleeve I3 that abuts against the spring I2 is provided with a coaxial circular groove I34, and the side of the limiting member 11 that abuts against the spring I2 is provided with a coaxial circular groove II. The circular grooves I34 and II can ensure the reliable contact of the spring I2.

[0086] In addition, the end of spring I2 that is opposite to the sliding sleeve I3 can directly abut against the inner wall of housing 17.

[0087] like Figure 6As shown, the through hole 15 includes a first hole segment and a second hole segment that are connected. The height of the second hole segment is greater than the height of the first hole segment, so that a corner is formed between the first hole segment and the second hole segment. A protrusion Ⅲ151 extending towards the end of the second hole segment is provided at the corner. The protrusion Ⅲ151 and the adjacent sidewall of the second hole segment form the aforementioned locking groove 152.

[0088] Working principle:

[0089] When the multi-functional stroller is stationary or switched to level mode, and the seat needs to be positioned horizontally, first move the lever 8 from the locking groove 152 towards the end of the second hole section (i.e., on the right in the figure) outside the housing 17. Then, move the lever 8 vertically until it is flush with the first hole section, releasing the locking groove 152 from limiting the lever 8. Continue to push the multi-functional stroller to rotate the driven wheel 4 until it rotates until the limiting boss 41 on the driven wheel 4 is aligned with the limiting groove 31 of the sliding sleeve I3. The end of the lever 8 where the protrusion I81 is located rotates along the hinge axis. The movement of the spring pushes the sliding sleeve I3 towards the driven wheel 4. Under the action of the spring I2, the slider 32 of the sliding sleeve I3 moves along the groove 12 on the housing 17 towards the driven wheel 4. At the same time, the limiting boss 41 and the limiting groove 31 are engaged, and the lever 8 is automatically moved to the first hole section of the through hole 15 under the action of the groove I33 of the sliding sleeve I3 on ​​the protrusion I81. Since the groove 12 restricts the rotation of the sliding sleeve I3, the driven wheel 4, which is engaged with the sliding sleeve I3, cannot rotate, thus realizing the positioning of the crank 5.

[0090] When switching the multi-functional stroller to rocking mode, to release the seat's movement restriction, first move the lever 8 towards the end of the second hole section outside the housing 17, then press the lever 8. The lever 8 can rotate around its hinge axis with the housing 17, causing the protrusion I81 on the lever 8 to move away from the driven wheel 4. Since the protrusion I81 cooperates with the groove I33 on the sliding sleeve I3, the protrusion I81 drives the sliding sleeve I3 away from the driven wheel 4, causing the driven wheel 4 and the sliding sleeve I3 to disengage from each other. The driven wheel 4 can resume rotation, releasing the restriction on the seat's movement. At the same time, under the elastic force of the spring I2, the lever 8 enters the locking groove 152, locking the lever 8.

[0091] Example 2:

[0092] This embodiment is based on embodiment 1, such as... Figure 7 and Figure 8 As shown, the end of the lever 8 located inside the housing 17 is the first end, and the end located outside the housing 17 is the second end. The second end is the handle 83.

[0093] The protrusion I 81 is located at the end of the lever 8 located inside the housing 17. The hinge axis between the lever 8 and the housing 17 is adjacent to the protrusion I 81 (this "adjacent" means that the center distance between the hinge axis and the protrusion I is less than the net distance between the hinge axis and the side wall of the housing 17 where the through hole 15 is located), and the thickness at the hinge axis of the lever 8 is greater than the thickness of the handle 83. Because the hinge axis between the lever 8 and the housing 17 is adjacent to the protrusion I 81, the lever arm is longer and less effort is required when the handle 83 is turned.

[0094] Specifically, a pin hole 82 is provided at the position adjacent to the protrusion I 81 on the lever 8, and a fixing seat 13 is provided inside the housing 17. The lever 8 is pinned to the fixing seat 13 through the pin hole 82 by a pin 10; the pin 10 is a metal part.

[0095] The lever 8 can be a straight lever or a curved lever. In one specific embodiment, the lever 8 is a curved lever to make room for the installation of the multi-functional stroller handle.

[0096] Example 3:

[0097] Based on Embodiment 1, this embodiment differs from Embodiment 2 in that the hinge shaft between the lever 8 and the housing 17 is located at the end of the lever 8 located inside the housing 17.

[0098] The protrusion I 81 is mounted on the lever 8 and is adjacent to the hinge shaft of the lever 8;

[0099] Furthermore, the through hole 15 is horizontally reversed compared to the through hole 15 in Embodiment 2.

[0100] Everything else is the same as in Example 2, and will not be repeated here.

[0101] Example 4:

[0102] like Figure 1 As shown, this embodiment, based on embodiment 2 and referring to the content of patent CN101492066A, provides a multifunctional children's stroller, including the aforementioned seat positioning mechanism, carrier, front wheel, rear wheel, frame, push handle, rocking structure, and clutch mechanism; the drive shaft 14 is rotatably mounted on the frame, and the two rear wheels are located at both ends of the drive shaft 14, one of which serves as the drive wheel 9; the drive wheel 9 is coaxially and fixedly connected to the drive shaft 14;

[0103] The swing structure is located between the front of the load-bearing body and the underframe. The upper end of the swing structure is pinned to the load-bearing body, and the lower end is pinned to the underframe. The swing structure uses a rocker arm.

[0104] like Figure 1 , 2 As shown in 9-11, the clutch mechanism is a sliding sleeve II 16, and the drive shaft 14 is also coaxially provided with a drive wheel 7 and a sliding sleeve II 16.

[0105] A guide block 18 is fixedly installed on the drive shaft 14, and a guide groove I 161 is provided on the inner circumference of the sliding sleeve II 16. The guide block 18 is located in the guide groove I 161, so that the sliding sleeve II 16 can slide along the drive shaft 14.

[0106] The driving wheel 7 and the driven wheel 4 are driven by the transmission mechanism 6. The driving wheel 7 is rotatably connected to the drive shaft 14. The end of the driving wheel 7 facing the sliding sleeve II 16 is provided with several guide bosses 19 distributed along the circumference. The end of the sliding sleeve II 16 facing the driving gear is provided with several guide grooves II 162 distributed along the circumference. The length direction of both the guide bosses 19 and the guide grooves II 162 is axial. The guide bosses 19 and the guide grooves II 162 can be matched one-to-one.

[0107] Furthermore, several guide grooves II162 are provided on the inner circumferential surface of the sleeve II16, and guide bosses 19 are provided on the outer circumferential surface of the drive wheel 7 facing the end of the sleeve II16.

[0108] like Figure 8 As shown, a protrusion II 84 is provided in the middle of the lever 8, and the protrusion II 84 and the protrusion I 81 are located on opposite sides of the hinge shaft; a groove II 163 is provided on the sliding sleeve II 16; the protrusion II 84 and the groove II 163 are in a concave-convex fit, which can realize the movement of the sliding sleeve II 16.

[0109] When the guide groove II162 of the sliding sleeve II16 engages with the guide boss 19 on the drive wheel 7, the multi-functional children's stroller is in a rocking state.

[0110] When the sliding sleeve II16 moves away from the drive wheel 7 and the guide boss 19 disengages from the guide groove II162, the multi-functional stroller is in a horizontal driving state.

[0111] The thickness of the protrusion Ⅱ 84 on the lever 8 is greater than the thickness of the handle 83 to ensure the strength of the lever 8.

[0112] Furthermore, the groove II163 can be an annular groove coaxial with the sliding sleeve II16, or it can be a coaxial arc groove, a circular groove extending radially, a square groove, or other polygonal grooves.

[0113] Furthermore, the driving pulley 7 is a driving pulley, the driven pulley 4 is a driven pulley, the transmission mechanism 6 is a belt, and the outer diameter of the driving pulley is smaller than the outer diameter of the driven pulley;

[0114] Alternatively, the driving gear 7 is the driving gear, the driven gear 4 is the driven gear, the transmission mechanism 6 is the idler gear, and the outer diameter of the driving gear is smaller than the outer diameter of the driven gear.

[0115] Alternatively, the driving sprocket 7 can be a driving sprocket, the driven sprocket 4 a driven sprocket, and the transmission mechanism 6 a chain, with the outer diameter of the driving sprocket being smaller than that of the driven sprocket.

[0116] Working principle:

[0117] When the seat needs to be limited in the stationary or horizontal movement mode of the multi-functional stroller, the protrusion II 84 moves the sliding sleeve II 16 with the movement of the lever 8, causing the sliding sleeve II 16 to move away from the drive wheel 7. The guide groove II 162 of the sliding sleeve II 16 disengages from the guide boss 19 on the drive wheel 7. The guide block 18 rotates with the drive shaft 14, thereby driving the sliding sleeve II 16 to rotate. Since the guide groove II 162 of the sliding sleeve II 16 disengages from the guide boss 19 on the drive wheel 7, the drive wheel 7 is rotatably connected to the drive shaft 14, so the drive wheel 7 does not rotate. Therefore, there is no transmission between the drive wheel 7 and the driven wheel 4.

[0118] In the rocking mode of the multi-functional stroller, when the seat needs to be released from its limit, the protrusion II 84 moves the sliding sleeve II 16 along with the movement of the lever 8, causing the sliding sleeve II 16 to move in the direction of the drive wheel 7. The guide groove II 162 of the sliding sleeve II 16 engages with the guide boss 19 on the drive wheel 7. The guide block 18 rotates with the drive shaft 14, thereby driving the sliding sleeve II 16 to rotate. Since the guide groove II 162 of the sliding sleeve II 16 engages with the guide boss 19 on the drive wheel 7, the drive wheel 7 and the sliding sleeve II 16 rotate synchronously, thereby driving the driven wheel 4 to rotate, causing the crank 5 to rotate, and the carrier to rock.

[0119] Example 5:

[0120] Based on any one of embodiments 1-3, and referring to the content of patent CN101492066A, this embodiment provides a multifunctional children's stroller, including the aforementioned seat positioning mechanism, carrier, front wheels, rear wheels, push handle, frame, rocking structure, and clutch mechanism; the drive shaft 14 is rotatably mounted on the frame, and the two rear wheels are located at both ends of the drive shaft 14, one of which serves as the drive wheel 9; the drive wheel 9 is coaxially and fixedly connected to the drive shaft 14;

[0121] The swing structure is located between the front of the carrier and the vehicle chassis. The upper end of the swing structure is pinned to the carrier, and the lower end is pinned to the vehicle chassis.

[0122] The driving gear 7 is the driving gear, and the driven gear 4 is the driven gear; the transmission mechanism 6 is the idler gear; the clutch mechanism is the idler gear carrier;

[0123] The driving gear is fixedly connected to the drive shaft 14. An idler gear frame is fitted around the driving wheel 7. The idler gear is rotatably mounted on the idler gear frame. The idler gear frame is slidably connected to the drive shaft 14, allowing the idler gear frame to slide along the axial direction of the drive shaft 14. By moving the idler gear frame, the idler gear frame meshes with both the driving gear and the driven gear simultaneously, thereby enabling transmission between the driving gear and the driven gear. By moving the idler gear frame, the idler gear disengages from both the driving gear and the driven gear simultaneously, cutting off the transmission between the driving gear and the driven gear.

[0124] Alternatively, the drive gear is slidably connected to the drive shaft 14, and the drive gear can move along the axial direction of the drive shaft 14, and the drive gear moves synchronously with the idler gear carrier;

[0125] Furthermore, the idler gear carrier can also rotate along the drive shaft 14; two or more driven gears of different specifications are set on the crank shaft. By synchronously moving the idler gear carrier, the idler gear and the driving gear, and rotating the idler gear carrier and the idler gear, the idler gear carrier can mesh or disengage with different driven gears, thereby realizing the transmission between the driving gear and driven gears of different specifications.

[0126] Alternatively, the idler gear carrier can rotate along the drive shaft 14, and the idler gear meshes with the driving gear. Rotating the idler gear carrier causes the idler gear to mesh or disengage with the driven gear, thereby connecting or disconnecting the transmission between the driving gear and the driven gear.

[0127] Example 6:

[0128] Based on any one of embodiments 1-3, this embodiment provides a multifunctional children's stroller, including a seat positioning mechanism, a carrier, front wheels, rear wheels, a push handle, a frame, a rocking structure, and a clutch mechanism;

[0129] The drive shaft 14 is rotatably mounted on the chassis, and the two rear wheels are located at both ends of the drive shaft 14, with one of the rear wheels serving as the drive wheel 9;

[0130] The swing structure is located between the front of the carrier and the vehicle chassis. The upper end of the swing structure is pinned to the carrier, and the lower end is pinned to the vehicle chassis.

[0131] The clutch mechanism is located on the drive wheel 9. This clutch mechanism controls the drive wheel 9 to rotate synchronously with the drive shaft 14 or to disengage from rotation, thereby controlling the switching between the flat walking mode and the dynamic mode of the multi-functional stroller.

[0132] The clutch mechanism can adopt the clutch structure disclosed in patent CN101492066A.

[0133] Example 7:

[0134] This embodiment is based on any one of embodiments 4-6, such as Figure 12As shown, a multifunctional children's stroller is provided, which also includes: an adjustable backrest 20 and an adjustable railing 21;

[0135] like Figure 13 and Figure 14 As shown, the adjustable backrest 20 includes: a backrest body, a lever 201, a brake cable, a mounting base I 202, a gear adjuster I 203, a limit seat 204, and a backrest adjustment slot 205;

[0136] The upper center of the backrest body has a guide groove, in which a lever 201 and a pressure block that limits the lever 201 are installed. On the lower inner sides of the backrest body, there are two backrest adjustment slots 205, each with a mounting base I 202 rotatably mounted. Two brake cables are installed in the adjustable backrest 20, with each end of the brake cable pulled by the lever 201 and the mounting base I 202 respectively. The lever 201 is positioned in the guide groove and can slide up and down along it (the up-down direction is consistent with the up-down direction of the backrest body). Sliding the lever 201 upwards can cause the pressure block to pull the brake cable upwards, thereby causing the mounting base I 202 to rotate.

[0137] The gear position adjuster I 203 is mounted on the mounting base I 202 and located in the backrest adjustment slot 205. The backrest adjustment slot 205 and the gear position adjuster I 203 are engaged by an inclined surface. Specifically, an inclined surface can be provided in the backrest adjustment slot 205, and a protrusion that engages with the inclined surface can be provided on the gear position adjuster I 203; alternatively, an inclined surface can be provided on the gear position adjuster I 203, and a protrusion that engages with the inclined surface can be provided in the backrest adjustment slot 205; alternatively, an inclined surface can be provided in both the gear position adjuster I 203 and the backrest adjustment slot 205, and the inclined surfaces of the two are engaged by surface contact.

[0138] When the two mounting seats I202 rotate, they are pushed outwards towards their respective inward sides due to the action of the inclined surfaces. The pushing out of the mounting seats I202 will push the gear adjuster I203 out of the backrest adjustment slot 205. After it is dislodged, the limiting seat 204 limits the gear adjuster I203. At this time, the backrest body can be rotated to adjust its tilt angle. The limiting seats 204 are installed on the two opposite sides of the rear end of the seat.

[0139] Furthermore, adjusting the forward tilt angle of the backrest body allows it to be folded for easy transport, while adjusting the backward tilt angle allows the child to recline at different angles. The backrest body can be adjusted to more than one backward tilt angle to accommodate different reclining angles for the child.

[0140] like Figure 15 As shown, the adjustable fence 21 includes: fence body, mounting base II 211, spring II 212, gear adjuster II 213, mounting cover 214 and button 215;

[0141] Mounting base II 211 is installed on the two opposite outer sides of the backrest body. Mounting base II 211 has guide posts and railing adjustment slots. Spring II 212 is fitted on the guide posts. The outer circumference of gear adjuster II 213 is provided with one or more axial bosses. The inner wall of the railing adjustment slot is provided with one or more axial grooves I. The axial bosses and axial grooves I are matched one by one. Gear adjuster II 213 presses against spring II 212.

[0142] The fence body has an integrally formed mounting cover 214 at both ends. The mounting cover 214 is circular. One end of the cover is snapped onto the outer circumference of the gear adjuster II 213 and fitted onto the inner circumference of the mounting base II 211. The other end is used to install the button 215, which is located outside the gear adjuster II 213.

[0143] The inner side of the mounting cover 214 is provided with several axial grooves II (not shown in the figure). The mounting cover 214 is provided with through holes. The button 215 passes through the through holes and abuts against the gear adjuster II 213. The axial boss can cooperate with the axial grooves II.

[0144] When it is necessary to adjust the fence body, press button 215. Under the action of the spring II 212, push the gear adjuster II 213 out of its current position in the mounting cover 214. Rotate the fence body until the fence body reaches the set angle. This can realize the adjustment and locking of different angles of the fence body relative to the backrest body.

[0145] Furthermore, several axial grooves II are provided at 30° intervals;

[0146] Furthermore, when the angle between the backrest and the seat is 110° (i.e., the seat is back), the railing is located in front of the backrest and is horizontal with the seat; when the angle between the backrest and the seat is 140° (i.e., the seat is back), the adjustable railing is located in front of the backrest and is horizontal with the seat; this can significantly improve comfort.

[0147] When the backrest is folded forward to be level with the seat and the railing is folded backward to be level with the backrest, transportation convenience can be effectively improved.

[0148] 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 an adjustable backrest and seat positioning mechanism; The adjustable backrest includes the backrest body, brake cable, and limit seat; The backrest body has a guide groove at the top, and a lever is installed in the guide groove. The lever can slide up and down along the guide groove. There is a backrest adjustment slot on each of the two inner sides at the bottom of the backrest body. A mounting seat I is rotatably installed in each backrest adjustment slot. The two ends of the brake cable are respectively connected to the lever and the mounting seat I. When the lever is slid upward, the mounting seat I can rotate. Mounting seat I is equipped with gear position adjuster I. The backrest adjustment slot and gear position adjuster I are engaged by an inclined surface. The limit seat limits the gear position adjuster I. When the mounting seat I is pulled, the mounting seat I can be disengaged from the backrest adjustment slot. The seat positioning mechanism is used to position the seat or to put the trolley in a rocking state.

2. The multifunctional stroller as described in claim 1, characterized in that, It also includes adjustable fencing; The adjustable fence includes the fence body, spring II, gear adjuster II, and button; Mounting base II is installed on the two opposite outer sides of the backrest body, which includes a guide post and a railing adjustment slot. Spring II is sleeved on the guide post, and gear adjuster II is installed in the railing adjustment slot and presses against spring II. The fence body has mounting covers at both ends. One end of the cover is snapped onto the outer periphery of the gear adjuster II and fitted onto the inner periphery of the mounting base II. The other end is fitted with a button. The button passes through the mounting cover, abuts against the gear adjuster II, and is located outside the gear adjuster II.

3. The multifunctional stroller as described in claim 2, characterized in that, The angle between the backrest body and the seat is 110° or 140°, and the railing body is horizontal with the seat.

4. The multifunctional children's stroller as described in claim 1, characterized in that, A pressure block is installed in the guide groove to limit the gripper in the guide groove.

5. A multifunctional children's stroller as described in any one of claims 1-4, characterized in that, The seat positioning mechanism includes a housing, spring I, sliding sleeve I, and lever; Sleeve I is coaxially sleeved on the crankshaft and adjacent to the driven wheel; Spring I is coaxially positioned on the side of sleeve I away from the driven wheel and abuts against sleeve I. The housing is provided with a sliding groove, which is arranged axially along the crankshaft; the sliding sleeve I is provided with a slider, which is located inside the sliding groove; The housing has a through hole, through which the lever passes. The part of the lever inside the housing is hinged to the housing. The lever also has a protrusion I and a groove I on the sliding sleeve I. The protrusion I and the groove I are in a convex-concave fit. A locking groove is provided below the through hole and communicates with it. When the lever is in the locking groove, spring I is compressed, the sliding sleeve I is disengaged from the driven wheel, and the multi-functional stroller is rocking. When the lever disengages from the locking groove, the lever can rotate along the hinge axis. Under the action of the spring force of spring I, the sliding sleeve I engages with the driven wheel to achieve seat positioning of the multi-functional children's stroller.

6. The multifunctional stroller as described in claim 5, characterized in that, The driven wheel is provided with a limiting boss, and the sliding sleeve I is provided with a limiting groove. When the limiting groove and the limiting boss cooperate, the seat is positioned.

7. A multifunctional children's stroller as described in claim 5, characterized in that, The through hole includes a first hole segment and a second hole segment that are connected. The height of the second hole segment is greater than the height of the first hole segment, so that a corner is formed between the first hole segment and the second hole segment. A protrusion III extending towards the end of the second hole segment is provided at the corner. The protrusion III and the sidewall of the adjacent second hole segment form the locking groove.

8. A multifunctional children's stroller as described in claim 5, characterized in that, The protrusion I is located at one end of the lever inside the housing; the hinge axis between the lever and the housing is adjacent to the protrusion I; the other end of the lever is a handle.

9. A multifunctional children's stroller as described in claim 8, characterized in that, The thickness of the lever at its hinge point is greater than the thickness of the handle.

10. A multifunctional children's stroller as described in claim 8, characterized in that, Also includes: The load-bearing structure, rear wheels, chassis, sway structure, and clutch mechanism; The swing structure is set between the front of the carrier and the vehicle chassis. The upper end of the swing structure is pinned to the carrier and the lower end is pinned to the vehicle chassis. The drive shaft is rotatably mounted on the chassis, with two rear wheels located at both ends of the drive shaft, one of which serves as the drive wheel; the drive wheel is coaxially and fixedly connected to the drive shaft. A drive wheel is also coaxially mounted on the drive shaft, and the drive wheel and the driven wheel are driven by a transmission mechanism; The clutch mechanism is used to control whether or not transmission occurs between the driving wheel and the driven wheel.

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