Stroller

Abstract

The invention discloses a child stroller which comprises a lower support, a handlebar, a front wheel set, a rear wheel set, an acting piece, a front steel wire and a rear steel wire, wherein the lower side of the handlebar is pivoted to the lower support, the front wheel set and the rear wheel set can be horizontally and rotatably connected to the front lower side and the rear lower side of the lower support, and the acting piece can be relatively and rotatably connected to the lower support. A front wheel orientation mechanism and a rear wheel orientation mechanism capable of limiting relative horizontal rotation of the front wheel set and the rear wheel set are arranged between the corresponding sides of the lower support and the front wheel set and between the corresponding sides of the lower support and the rear wheel set respectively, and the lower sides of the front and rear steel wires are connected with the front and rear wheel orientation mechanisms respectively; the lower side of the handlebar is connected with a driving piece capable of rotating along with the handlebar, and the driving piece is matched with the acting piece. When the handlebar is switched between the forward position and the backward position, the acting piece can rotate along with the rotation of the driving piece, and then the front steel wire and the rear steel wire are pulled to move upwards or the upward pulling of the front steel wire and the rear steel wire is released, so that the front wheel orientation mechanism and the rear wheel orientation mechanism are switched between the unlocking state and the locking state, and the operation is very simple and convenient.

Description

Technical Field

[0001] The present invention relates to the field of infant products, and more particularly to baby strollers. Background Art

[0002] Baby strollers can be used to carry infants. The infants sit on the seats of the baby strollers, and the parents push the baby strollers forward, thus reducing the hardship of the parents holding the babies. Therefore, baby strollers are widely used in families with children.

[0003] The handlebars of some baby strollers are arranged to be rotatable and convertible between a forward position and a backward position. When the handlebars are rotated to the forward position, the child in the baby stroller faces the parents face to face; when the handlebars are rotated to the backward position, both the child in the baby stroller and the parents face forward. Such an arrangement can make it more convenient for parents to take care of the child.

[0004] However, for traditional baby strollers, some only have the front wheels arranged to be horizontally rotatable, and the rear wheels cannot be horizontally rotated. Thus, when the handlebars are rotated to the forward position, the wheels (the original rear wheels) on the front side in the forward direction of the baby stroller cannot be horizontally rotated. In this way, if there are small obstacles on the road surface, the front wheels in the forward direction cannot rotate and turn well to avoid them, resulting in the baby stroller not moving forward very smoothly and safely.

[0005] Some baby strollers have both the front wheels and the rear wheels arranged to be horizontally rotatable. However, in both cases, a vertically movable orienting member is provided on the corresponding wheel seat, and then corresponding downward-opening orienting grooves are provided on the front feet / rear feet. When it is necessary to make the front wheels and the rear wheels non-orientable and non-horizontally rotatable, it is necessary to move the orienting member upward before or after the handlebars are reversed so that it engages with the corresponding orienting grooves on the front feet / rear feet; conversely, move the orienting member downward to disengage it from the orienting grooves. Such an arrangement makes the operations of orienting and unlocking the front and rear wheels rather troublesome. Summary of the Invention

[0006] The purpose of the present invention is to overcome the above disadvantages and provide a new type of baby stroller in which both the front and rear wheels 42 are arranged to be horizontally rotatable, and when the handlebars are rotated to the forward position, the front wheel set 32 can be linked to be converted into a state where it cannot rotate horizontally relative to each other, and the rear wheel set can be linked to be converted into a state where it can rotate horizontally relative to each other; when the handlebars are rotated to the backward position, the front wheels can be linked to be converted into a state where they can rotate horizontally relative to each other, and the rear wheel set can be linked to be converted into a state where it cannot rotate horizontally relative to each other.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is:

[0008] A baby stroller that can be switched between an unfolded state and a folded state. The baby stroller includes a lower bracket, a carriage pivotally connected to the lower bracket at the lower side, and the carriage is configured to be rotatable and convertible between a rearward position and a forward position; the baby stroller further includes a front wheel set rotatably connected to the front lower side of the lower bracket relative to the horizontal, a rear wheel set rotatably connected to the rear lower side of the lower bracket relative to the horizontal, a front wheel orientation mechanism and a rear wheel orientation mechanism are provided between the corresponding sides of the lower bracket and the front wheel set and the rear wheel set respectively to limit the relative horizontal rotation of the corresponding two; the baby stroller also includes an operating member rotatably connected to the lower bracket, a front steel wire and a rear steel wire connected to the upper side of the operating member, the lower side of the front steel wire is connected to the front wheel orientation mechanism, and the lower side of the rear steel wire is connected to the rear wheel orientation mechanism; a driving member rotatable in the same direction as the carriage is connected to the lower side of the carriage, and the driving member is cooperatively arranged with the operating member; when the carriage is switched between the forward position and the rearward position, the operating member can rotate with the rotation of the driving member, thereby pulling the front steel wire or the rear steel wire upward, or releasing the upward pulling of the front steel wire or the rear steel wire, so that the front wheel orientation mechanism and the rear wheel orientation mechanism are switched between the unlocked state and the locked state. Because the present invention adopts the above technical solution, the following beneficial effects are achieved:

[0009] 1. When the carriage rotates to the forward position, it can drive the front wheel set to switch to a state where it cannot rotate relatively horizontally, and drive the rear wheel set to switch to a state where it can rotate relatively horizontally; when the carriage rotates to the rearward position, it can drive the front wheels to switch to a state where they can rotate relatively horizontally, and drive the rear wheel set to switch to a state where it cannot rotate relatively horizontally. In this way, the orientation of the front wheel set and the rear wheel set can be automatically switched with the rotation of the carriage without additional operations, so the operation of the orientation of the front wheel set and the rear wheel set is very simple;

[0010] 2. Whether the carriage is in the forward position or the rearward position, when the parents push the baby stroller forward through the carriage, the front wheel set located on the front side in the forward direction of the baby stroller can rotate horizontally, and the rear wheel set can only go straight. Therefore, when the baby stroller is moving forward, if there are slight obstacles on the road, the front wheel set can rotate horizontally to avoid them, while the rear wheel set maintains its original traveling direction, which can make the progress of the baby stroller smoother and safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional schematic diagram of the baby stroller of the present invention in the unfolded state when the carriage is in the rearward position;

[0012] Figure 2 It is a plan schematic diagram of the baby stroller of the present invention in the unfolded state when the carriage is in the forward position;

[0013] Figure 3 It is a partially exploded and enlarged schematic diagram of the rear wheel set of the baby stroller of the present invention and the lower side of the rear foot;

[0014] Figure 4 It is a schematic enlarged view of the cross-section in the B-B direction according to Figure 2 in the figure;

[0015] Figure 5 It is a schematic enlarged view of part A according to Figure 1 in the figure;

[0016] Figure 6 It is a schematic enlarged view of some components in part A according to Figure 1 in the figure;

[0017] Figure 7 It is a schematic enlarged view of the cross-section in the C-C direction according to Figure 5 in the figure;

[0018] Figure 8 It is a schematic enlarged view of the combination of the acting part, the front steel wire and the rear steel wire of the baby stroller of the present invention;

[0019] Figure 9 It is a schematic enlarged view of the driving part of the baby stroller of the present invention;

[0020] Figure 10 It is a schematic enlarged view of the combination of the acting part, the front steel wire and the rear steel wire of the baby stroller of the present invention from another angle;

[0021] Figure 11 It is a schematic exploded enlarged view according to Figure 5 in the figure;

[0022] Figure 12 It is a schematic exploded enlarged view from another angle according to Figure 5 in the figure;

[0023] Figure 13 It is a schematic enlarged view of the cross-section of the combination of the rider, the front foot, the rear foot, the acting part and the driving part of the baby stroller of the present invention when the rider is in the rear-facing position;

[0024] Figure 14 It is a schematic enlarged view of the cross-section of the combination of the rider, the front foot, the rear foot, the acting part and the driving part of the baby stroller of the present invention when the rider is in the forward-facing position;

[0025] Figure 15 It is a schematic view of the baby stroller of the present invention during the folding process;

[0026] Figure 16 It is a schematic enlarged view of the cross-section of the combination of the rider, the front foot, the rear foot, the acting part and the driving part of the baby stroller of the present invention during the folding process. Detailed implementation mode

[0027] Such as Figures 1 to 16As shown, the present invention discloses a baby stroller that can be converted between an unfolded state and a folded state. The baby stroller includes a lower bracket 1 and a stroller body 2 pivotally connected to the lower bracket 1 at the lower side, and the stroller body 2 is configured to be rotatable and convertible between a rearward position and a forward position; the baby stroller further includes a front wheel set 3 rotatably connected to the front lower side of the lower bracket 1 relative to the horizontal plane and a rear wheel set 4 rotatably connected to the rear lower side of the lower bracket 1 relative to the horizontal plane. A front wheel orientation mechanism and a rear wheel orientation mechanism for restricting the relative horizontal rotation between the corresponding two are provided between the corresponding sides of the lower bracket 1 and the front wheel set 3 and the rear wheel set 4 respectively, that is, a front wheel orientation mechanism for restricting the relative horizontal rotation between the front side of the lower bracket 1 and the front wheel set 3 is provided, and a rear wheel orientation mechanism for restricting the relative horizontal rotation between the rear side of the lower bracket 1 and the rear wheel set 4 is provided; the baby stroller further includes an operating member 5 rotatably connected to the lower bracket 1, a front steel wire 51 connected to the upper side of the operating member 5, and a rear steel wire 52. The lower side of the front steel wire 51 is connected to the front wheel orientation mechanism, and the lower side of the rear steel wire 52 is connected to the rear wheel orientation mechanism; a driving member 6 that can rotate in the same direction as the stroller body 2 is connected to the lower side of the stroller body 2, and the driving member 6 is cooperatively arranged with the operating member 5; when the stroller body 2 is converted between the forward position and the rearward position, the operating member 5 can rotate along with the rotation of the driving member 6, thereby pulling the front steel wire 51 or the rear steel wire 52 to move upward, or releasing the upward pulling force on the front steel wire 51 or the rear steel wire 52, so that the front wheel orientation mechanism and the rear wheel orientation mechanism are converted between an unlocked state and a locked state. That is, if the front wheel orientation mechanism and the rear wheel orientation mechanism are in a locked state before the stroller body 2 is reversed, they will become an unlocked state after the stroller body 2 is reversed; if they are in an unlocked state before the stroller body 2 is reversed, they will become a locked state after the stroller body 2 is reversed, thereby changing the state of whether the front wheel set 3 and the rear wheel set 4 can rotate horizontally.

[0028] In this embodiment, when the stroller body 2 rotates from the rearward position to the forward position, the operating member 5 rotating in one direction pulls the rear steel wire 52 to move upward, so that the rear wheel orientation mechanism is converted to the unlocked state, and the pulling force on the front steel wire 51 is released, so that the front wheel orientation mechanism can be converted to the locked state. Thus, the rear wheel set 4 can rotate horizontally relative to the rear lower side of the lower bracket 1, and the front wheel set 3 cannot rotate horizontally relative to the front lower side of the lower bracket 1; when the stroller body 2 rotates from the forward position to the rearward position, the operating member 5 rotating in the opposite direction pulls the front steel wire 51 to move upward, so that the front wheel orientation mechanism is converted to the unlocked state, and the pulling force on the rear steel wire 52 is released, so that the rear wheel orientation mechanism can be converted to the locked state. Thus, the rear wheel set 4 cannot rotate horizontally relative to the rear lower side of the lower bracket 1, and the front wheel set 3 can rotate horizontally relative to the front lower side of the lower bracket 1.

[0029] In this embodiment, a first elastic member 53 is provided between the acting member 5 and the lower bracket 1, which can drive the acting member 5 to rotate; the cooperation between the acting member 5 and the driving member 6 is also arranged such that during the rotation of the rider 2 from the rear position to the front position, the driving member 6 pushes the acting member 5 to rotate in one direction (hereinafter, for the convenience of description, this direction is referred to as the clockwise direction); during the rotation of the rider 2 from the front position to the rear position, the driving member 6 disengages from the push on the acting member 5, and under the action of the first elastic member 53, the acting member 5 rotates in the other opposite direction (hereinafter, for the convenience of description, this opposite direction is referred to as the counterclockwise direction).

[0030] Preferably, the acting member 5 and the rider 2 are coaxially pivotally connected to the lower bracket 1. In other embodiments, it may also be that the rider 2 is rotatably connected to the lower bracket 1 around a first rotating shaft, and the rider 2 is rotatably connected to the lower bracket 1 around a second rotating shaft, and the two rotating shafts are arranged on the same straight line or in parallel.

[0031] An eccentric first travel groove 54 is provided on the acting member 5, and a driving portion 61 is provided on the driving member 6. The driving portion 61 can be relatively rotatably inserted into the first travel groove 54. Preferably, when the rider 2 is in the rear position, the driving portion 61 abuts against the rear end wall of the first travel groove 54, so that as long as the rider 2 rotates forward, the driving portion 61 can immediately drive the driving member 6 to rotate by pushing the rear end wall, thus making the operation faster. In other embodiments, when the rider 2 is in the rear position, the driving portion 61 may not abut against the rear end wall of the first travel groove 54, but there is a certain distance between the two, so that after the rider 2 rotates forward for a period of time, the driving portion 61 will contact the rear end wall, and when the rider 2 continues to rotate, the driving portion 61 will push the acting member 5 to rotate.

[0032] In this embodiment, a second travel groove 55 is also eccentrically provided on the acting member 5, and a first spring seat 11 protrudes from the lower bracket 1. The first spring seat 11 extends into the second travel groove 55; one side of the first elastic member 53 is connected to the first spring seat 11, and the other side is connected to the groove wall on the opposite side of the second travel groove 55, so that when the driving portion 61 does not abut against the rear end wall of the first travel groove 54, the acting member 5 will maintain a tendency to rotate in the counterclockwise direction (i.e., the other opposite direction). Preferably, a second spring seat 56 is provided on the groove wall of the second travel groove 55 opposite to the first spring seat 11, and the other side of the first elastic member 53 is connected to the second spring seat 56.

[0033] The first travel groove 54 and the second travel groove 55 are spaced apart from each other, so as to avoid interference between the driving part 61 and the elastic member and affect the normal rotation of the actuator 5. In this embodiment, the second travel groove 55 is located outside the first travel groove 54.

[0034] Preferably, the lower bracket 1 is further provided with a blocking member 12, and the blocking member 12 is configured such that, when the rider 2 is in the rearward position, one side of the action member 5 abuts against the front end of the blocking member 12, and a gap is formed between the other side and the rear end of the blocking member 12. In this way, even with the elastic force of the first elastic member 53, the action member 5 cannot rotate counterclockwise. Furthermore, when the rider 2 is in the forward position, the other side of the action member 5 abuts against the rear end of the blocking member 12, and a gap is formed between one side and the front end of the blocking member 12.

[0035] In this embodiment, the lower side of the rider 2 and the action member 5 are respectively connected to the two opposite sides of the lower bracket 1, and at least the driving part 61 of the driving member 6 and the action member 5 are located on the same side of the lower bracket 1, that is, on the side of the lower bracket away from the rider 2.

[0036] The lower bracket 1 is provided with a connecting hole 13 penetrating left and right, the active member 5 is provided with a through hole 50 penetrating left and right, and the side of the through hole 50 away from the rider 2 is communicated with the first stroke groove 54, the driving member 6 includes a main body 60 and the driving part 61 eccentrically arranged on one side of the main body 60; a connecting member 25 is connected to the rider 2 on one side, and passes through the connecting hole 13 and the through hole 50 on the other side to be connected to the main body 60, thereby connecting the rider 2, the lower bracket, the active member 5 and the driving member 6.

[0037] In this embodiment, the main body 60 includes a main body 601 and a matching platform 602 extending from the main body 601 toward the side of the working member 5. The driving part 61 is located on the side of the main body 601 facing the working member and on one side of the matching platform 602. The matching platform 602 can be relatively rotatable through the through hole 50 of the working member 5 and the connecting hole 13 of the lower bracket 1 to be connected to the driver 2.

[0038] In order to ensure that the driving member 6 can rotate synchronously with the driver 2, the driver 2 is provided with an assembly portion 22 on the side facing the action member 5. One of the assembly portion 22 and the matching platform 602 is provided with a matching square hole 221 on the side facing the other, and the other is provided in a square shape and extends into the matching square hole 221. Preferably, a limiting groove 222 is provided on the inner wall of the matching square hole 221, and a corresponding limiting protrusion 63 is provided on the outer wall of the other, and the limiting protrusion 63 extends into the limiting groove 222. Such a configuration not only enables the driver 2 to drive the action member 5 to rotate more synchronously when rotating, but also facilitates the assembly and positioning of the driver 2 and the action member 5.

[0039] In this embodiment, a matching square hole 221 is recessed on a side of the assembly portion 22 facing the active member 5 , and the matching platform 602 is configured in a square shape, and the square matching platform 602 extends into the matching square hole 221 .

[0040] The driving member 6 is provided with a hole 64 which passes through the main body 601 and the mating platform 602; the connecting member 25 passes through the rider 2, passes through the mating square hole and then passes through the hole 64, and then is locked into the connecting member 25 from the other side of the hole 64 by a screw 26, thereby connecting the rider 2, the lower bracket 1, the action member 5 and the driving member 6. After the driving member 6 is connected to the rider 2, the main body 601 is located on the side of the action member 5 away from the rider 2.

[0041] In other embodiments, the main body 60 may only include the main body 601 or only include the matching platform 602. When only the matching platform 602 is provided, the driving unit 61 is provided at one side of the matching platform.

[0042] In other embodiments, the rider 2, the driving member 6 and the action member 5 may be connected to the same side of the lower bracket, and the connection method may be modified adaptively. When so configured, the driving part may also be integrally formed on the lower side of the rider.

[0043] In this embodiment, a accommodating cavity 10 is provided on the lower bracket 1, and the operating member 5 can be relatively rotatably placed in the accommodating cavity 10. A front channel (not shown) for the routing of the front steel wire 51 is provided between the accommodating cavity 10 and the front wheel orientation mechanism, and a rear channel (not shown) for the routing of the rear steel wire 52 is provided between the accommodating cavity 10 and the rear wheel orientation mechanism, so that the front steel wire 51 and the rear steel wire 52 connected to the operating member 5 can be connected to the corresponding front wheel orientation mechanism (front wheel orientation member) and rear wheel orientation mechanism (rear wheel orientation member 14) via the front channel and the rear channel respectively.

[0044] Preferably, a recessed avoidance cavity 101 is formed in a part of the bottom wall of the accommodation cavity 10. A connecting part 57 protrudes from the corresponding side of the acting part 5. The connecting part 57 is rotatably inserted into the avoidance cavity 101. The upper sides of the front steel wire 51 and the rear steel wire 52 are both connected to the connecting part 57. Correspondingly, a first channel 102 and a second channel 103 are arranged on the bottom wall of the accommodation cavity 10. The first channel 102 communicates the avoidance cavity 101 with the front channel for the front steel wire 51 to pass through, and the second channel 103 communicates the avoidance cavity 101 with the rear channel for the rear steel wire 52 to pass through. With such an arrangement, the parts of the front steel wire 51 and the rear steel wire 52 extending outside the front channel and the rear channel will only move within the avoidance cavity 101, the first channel 102, and the second channel 103, and will not run onto the accommodation cavity 10. Therefore, when the acting part 5 rotates, it will not interfere with the front steel wire 51 and the rear steel wire 52, thus not affecting the upward movement and release of the front steel wire 51 and the rear steel wire 52.

[0045] The first spring seat 11 protrudes from the bottom wall of the accommodation cavity 10.

[0046] The blocking part 12 protrudes from the bottom wall of the accommodation cavity 10. When the rider 2 is in the rearward position, one side of the part of the acting part 5 located in the accommodation cavity 10 abuts against the front end of the blocking part 12, and there is a gap between the other side and the rear end of the blocking part 12; when the rider 2 is in the forward position, the other side of the part of the acting part 5 located in the accommodation cavity 10 abuts against the rear end of the blocking part 12, and there is a gap between one side and the front end of the blocking part 12.

[0047] In this embodiment, one side of the acting part 5 is fan-shaped. The fan-shaped part 58 is all located in the accommodation cavity 10, and it is this fan-shaped part 58 that abuts against the front end or the rear end of the blocking part 12. The connecting part 57 protrudes from the part of the acting part outside the fan-shaped part.

[0048] The rear wheel orientation mechanism includes a rear wheel orientation part 14 that is movably connected to the lower side of the rear part of the lower bracket 1, a rear mating part 43 arranged on the rear wheel set 4 that can cooperate with the rear wheel orientation part 14. A rear elastic part 44 is arranged between the rear wheel orientation part 14 and the lower side of the rear part of the lower bracket 1. The lower side of the rear steel wire 52 is connected to the rear wheel orientation part 14. When the acting part 5 releases the upward pulling force on the rear steel wire 52, under the action of the rear elastic part 44, when the rear wheel orientation part 14 moves relative to the lower side of the rear part of the lower bracket 1 and cooperates with the rear mating part 43, the rear wheel orientation mechanism is in a locked state, and the rear wheel set 4 cannot rotate horizontally relative to the lower side of the rear part of the lower bracket 1; when the rear steel wire 52 moves upward and pulls the rear wheel orientation part 14 to move relative to the lower side of the rear part of the lower bracket 1 and disengages from the rear mating part 43, the rear wheel orientation mechanism is unlocked, and the rear wheel set 4 can rotate horizontally relative to the lower side of the rear part of the lower bracket 1.

[0049] In this embodiment, the rear wheel orienting member 14 is arranged to be connected to the lower side of the rear part of the lower bracket 1 in a relatively vertically movable manner, and the rear mating part 43 is arranged as a rear orienting hole 43 with an upward opening. When the lower side of the rear wheel orienting member 14 extends into the rear orienting hole 43, the rear wheel orienting mechanism is in a locked state, and the rear wheel set 4 cannot horizontally rotate relative to the lower side of the rear part of the lower bracket 1, that is, the rear wheel 42 cannot horizontally rotate relative to the lower side of the rear part of the lower bracket 1. When the rear wheel orienting member 14 is pulled upward by the rear steel wire 52 and disengages from the rear orienting hole 43, the rear wheel orienting mechanism is unlocked, and the rear wheel seat 41 can horizontally rotate relative to the lower side of the rear part of the lower bracket 1.

[0050] The rear wheel set 4 includes a rear wheel seat 41 connected to the lower side of the rear part of the lower bracket 1 in a relatively horizontally rotatable manner and a rear wheel 42 connected to the rear wheel seat 41; the rear orienting hole 43 is arranged on the rear wheel seat 41.

[0051] Similarly, the front wheel orienting mechanism includes a front wheel orienting member movably connected to the lower side of the front part of the lower bracket 1, a front mating part (not shown in the figure) arranged on the front wheel set 3 and capable of cooperating with the front wheel orienting member, and a front elastic member is arranged between the front wheel orienting member and the lower side of the front part of the lower bracket 1, and the lower side of the front steel wire 51 is connected to the front wheel orienting member. When the acting member 5 releases the upward pulling on the front steel wire 51, under the action of the front elastic member, the front wheel orienting member moves relative to the lower side of the front part of the lower bracket 1 and cooperates with the front mating part, and the front wheel orienting mechanism is in a locked state, and the front wheel set 3 cannot horizontally rotate relative to the lower side of the front part of the lower bracket 1; when the front steel wire 51 moves upward and pulls the front wheel orienting member to move relative to the lower side of the front part of the lower bracket 1 and disengages from the front mating part, the front wheel orienting mechanism is unlocked, and the front wheel set 3 can horizontally rotate relative to the lower side of the front part of the lower bracket 1.

[0052] The front wheel orienting member is arranged to be connected to the lower side of the front part of the lower bracket 1 in a relatively vertically movable manner, and the front mating part is arranged as a front orienting hole with an upward opening. The front wheel set 3 includes a front wheel seat 31 connected to the lower side of the front part of the lower bracket 1 in a relatively horizontally rotatable manner and a front wheel 32 connected to the front wheel seat 31; the front orienting hole is arranged on the front wheel seat.

[0053] A receiving hole (not shown in the figure) with a downward opening is arranged on the lower side of the rear part of the lower bracket 1, and the upper side of the rear wheel orienting member 14 is relatively vertically movably placed in the receiving hole, so that the lower side of the rear wheel orienting member 14 can extend downward out of the lower side of the receiving hole and extend into the rear orienting hole 43. The rear elastic member 44 is placed between the top wall of the receiving hole and the rear wheel orienting member 14. Similarly, the lower side of the front part of the lower bracket 1 and the front wheel orienting member and the front elastic member 37 can also adopt this arrangement.

[0054] Combined with Figure 6 、 13As shown, when the stroller is in the unfolded state and the rider 2 is in the rear-facing state, the driving part 61 of the driving member 6 abuts against the rear end wall of the first stroke groove 54 of the acting member 5. One end of the fan-shaped part 58 of the acting member 5 abuts against the front end of the blocking member 12, and there is a certain distance between the other end of the fan-shaped part 58 and the rear end of the blocking member 12. And in this state, the front steel wire 51 is in the state of being pulled upward, and the rear steel wire 52 is in the released state. Thus, the front steel wire 51 pulls the front wheel orienting member upward so that it disengages from the front orienting hole on the front wheel seat, and the front wheel orienting mechanism is in the unlocked state. The front wheel set 3 can horizontally rotate relative to the front lower side of the lower bracket 1, that is, the front wheel 32 can horizontally rotate relative to the front lower side of the lower bracket 1, and the front elastic member is in the compressed state; and because the rear steel wire 52 is in the released state, under the action of the rear elastic member 44, when the rear wheel orienting member 14 is aligned with the rear orienting hole 43 on the rear wheel seat 41, the lower side of the rear wheel 42 orienting hole extends into the rear orienting hole 43 on the rear wheel seat 41 (as Figure 4 shown), the rear wheel orienting mechanism is in the locked state, and the rear wheel set 4 cannot horizontally rotate relative to the rear lower side of the lower bracket 1, that is, the rear wheel 42 cannot horizontally rotate relative to the rear lower side of the lower bracket 1. Thus, when the rider 2 is in the rear-facing position, the rear wheel 42 can only go straight, while the front wheel 32 can horizontally rotate. Therefore, when pushing the stroller forward by pushing the rider 2, if there are slight obstacles on the road, the front wheel 32 can horizontally rotate to avoid them, and the rear wheel set at the rear side maintains the original traveling direction, which can make the progress of the stroller smoother and safer.

[0055] When it is necessary to change the orientation of the rider 2, when the rider 2 is rotated forward, the driving member 6 is driven to rotate in the same direction together, so that the driving portion 61 of the driving member 6 drives the acting member 5 to rotate clockwise together by pushing the rear end wall of the first stroke groove 54 of the acting member 5. As the acting member 5 rotates, one end of the fan-shaped portion 58 is away from the front end of the blocking member 12, and the other end approaches the rear end of the blocking member 12. And as the acting member 5 rotates, the front steel wire 51 is gradually released, and the rear steel wire 52 is gradually pulled upward, so that the rear wheel orienting member 14 is pulled to move upward. Under the action of the front elastic member, the front wheel orienting member always maintains a tendency to move downward. If the front wheel seat rotates until the front orienting hole thereon is aligned with the front wheel orienting member, the lower side of the front wheel orienting member extends into the orienting hole of the front wheel seat, and during the rotation of the acting member 5, the first elastic member 53 is compressed. When the rider 2 rotates to the backward position, the lower side of the rear wheel orienting member 14 completely disengages from the rear orienting hole 43 of the rear wheel seat 41, and the rear wheel orienting mechanism is unlocked, so that the rear wheel 42 can horizontally rotate relative to the rear lower side of the lower bracket 1; while the lower side of the front wheel orienting member safely extends into the front orienting hole of the front wheel seat, and the front wheel orienting mechanism is in the unlocked state. In this way, when the rider 2 is in the forward position and the parent pushes the rider 2 to move the stroller forward, it is equivalent to the rear wheel 42 being in the front and can horizontally rotate relative to the rear lower side of the lower bracket 1, while the front wheel 32 is in the rear and can only go straight. If there is a slight blockage on the road, the rear wheel 42 at the front side can horizontally rotate to avoid it, while the front wheel 32 at the rear side maintains the original traveling direction, which can make the progress of the stroller smoother and safer.

[0056] And when the rider 2 is in the backward position, the other end of the fan-shaped portion 58 of the acting member 5 abuts against the rear end of the blocking member 12 (as Figure 14 shown), and during the whole process of the rider 2 rotating from the backward position to the forward position, the driving portion 61 of the driving member 6 always abuts against the rear end wall of the first stroke groove 54 of the acting member 5; and when the rider 2 rotates to the forward position, the other end of the fan-shaped portion 58 abuts against the rear end of the blocking member 12. At this time, the driving member 6 cannot rotate clockwise anymore, so that the rider 2 fixedly connected to the driving member 6 cannot rotate forward anymore. That is to say, when the rider 2 rotates forward until it cannot rotate forward anymore, it means that the rider 2 has rotated to the forward position. With such a setting, the forward commutation operation of the rider 2 is more intuitive.

[0057] When the rear of the vehicle in the forward position is to be rotated backward to the backward position, the rider 2 is rotated backward, driving the driving part 61 of the driving member 6 to rotate counterclockwise, so that the driving part 61 no longer generates a pushing force on the rear wall of the first stroke groove 54 of the action member 5. In this way, under the action of the restoring force of the first elastic member 53, the action member 5 is driven to rotate counterclockwise. Because the action member 5 rotates in this way, the front steel wire 51 is pulled upward, and the rear steel wire 52 is gradually released, thereby driving the front wheel orientation member to move upward, so that the rear wheel 42 keeps a downward movement trend before orientation. Until the rider 2 rotates to the backward position, the locking mechanism of the rear wheel 42 is in a locked state again, and the locking mechanism of the front wheel 32 is in an unlocked state again.

[0058] As described above, when the rider 2 is in the backward position, the front wheel orientation mechanism is in the unlocked state, and the rear wheel orientation mechanism is in the locked state, so that the rear wheel 42 cannot rotate horizontally, and the front wheel 32 can rotate horizontally; when the rider 2 is in the forward position, the front wheel orientation mechanism is in the locked state, and the rear wheel orientation mechanism is in the unlocked state, so that the original front wheel 32 cannot rotate horizontally, and the original rear wheel 42 can only go straight. That is to say, no matter where the rider 2 is, when the parents push the child stroller forward through the rider 2, the wheel set on the front side in the forward direction of the child stroller can rotate horizontally, and the wheel set on the rear side cannot rotate horizontally. In this way, when the child stroller moves forward, if there are slight obstacles on the road, such as small stones, the wheel set on the front side can rotate horizontally to avoid them, while the wheel set on the rear side maintains the original direction of travel, which can make the child stroller move more smoothly and safely. Moreover, to achieve the above functions, no additional operation is required, and the rotation of the rider 2 can automatically achieve the linkage with the relevant components, so that the operation is very simple.

[0059] The child stroller of the present invention is configured such that when the rider 2 is in the rearward position, the child stroller can be folded, and when folded, the rider 2 rotates backward and downward. And because the driving member 6 and the action member 5 are configured as above, when the rider 2 rotates backward and downward during the folding process (such as Figure 15 As shown), the driving member 6 rotates in the same direction, and the driving portion 61 of the driving member 6 rotates counterclockwise along the first stroke groove 54 of the action member 5 (as shown Figure 16 As shown in the figure), because one end of the fan-shaped portion 58 of the action member abuts against the front end of the blocking member 12, the action member 5 remains stationary and does not rotate, that is, only the rider 2 and the driving member 6 rotate until the rider 2 rotates to the point where it can no longer rotate, and the child stroller is completely folded (not shown).

[0060] When the folded stroller is to be unfolded, the rider 2 is rotated forward and upward, thereby driving the driving member 6 to rotate together. The driving member 6 of the driving member 6 rotates clockwise in the first stroke groove 54. When the rider 2 rotates to the rearward position, the driving member 6 abuts against the rear end wall of the first stroke groove 54. During this process, the acting member 5 still does not rotate.

[0061] A rider locking mechanism is provided between the lower side of the rider 2 and the lower bracket 1. After unlocking the rider locking mechanism, the rider 2 can rotate relative to the lower bracket 1. Figure 7 、 11 As shown in FIGS. 12, the rider locking mechanism includes a first tooth groove 21 and a second tooth groove 15 respectively provided on the opposite sides of the lower side of the rider 2 and the lower bracket 1, a gear 71 movably disposed left and right in the first tooth groove 21 and the second tooth groove 15, and a return spring 72 provided between the bottom wall of the second tooth groove 15 and the gear 71. Under the action of the return spring 72, the gear 71 meshes with the first tooth groove 21 and the second tooth groove 15 at the same time, and the rider locking mechanism is in a locked state, and the rider 2 and the lower bracket 1 cannot rotate relative to each other.

[0062] A driven member 23 that can rotate relative to and move relative to the first tooth groove 21 is provided between the bottom wall of the first tooth groove 21 and the gear 71. An operating member 24 that can move up and down relative to the rider 2 is provided on the rider 2. The lower end of an unlocking wire is connected to the driven member 23, and the upper end is connected to the operating member 24. When the rider locking mechanism is to be unlocked, the operating member 24 is moved upward, which can pull the unlocking wire upward, thereby pulling the driven member 23 to rotate and move toward the gear 71, and further pushing the gear 71 to move into the second tooth groove 15. When the gear 71 moves out of engagement with the first tooth groove 21, the rider locking mechanism is unlocked, and the rider 2 can rotate relative to the lower bracket 1.

[0063] In this embodiment, the second tooth groove 15 and the accommodating cavity 10 are respectively provided on opposite sides of the lower bracket and communicate with each other, that is, they communicate through the connecting hole 13, and the connecting member 25 also passes through the gear. That is, the gear 71 is pivotally connected to the lower side of the rider 2, the acting member 5, and the driving member 6 coaxially (connecting member 25), so that the connection is more convenient.

[0064] In other embodiments, the specific structure and unlocking method of the rider locking mechanism can be any other well-known and feasible structure, as long as it does not affect the unlocking and locking of the above-mentioned front wheel orientation mechanism and rear wheel orientation mechanism. Since it is not the inventive point of the present invention, it will not be elaborated here.

[0065] In this embodiment, the lower bracket 1 includes a front foot 16 and a rear foot 17. The rear side of the front foot 16 is pivotally connected to the front side of the rear foot 17. The lower side of the rider 2 and the acting member 5 are pivotally connected to the front foot 16 or / and the rear foot 17. The front wheel set 3 is rotatably connected to the lower front side of the front foot 16 relative to the horizontal plane, and the rear wheel set 4 is rotatably connected to the lower front side of the rear foot 17 relative to the horizontal plane. The front wheel orienting member is movably (vertically movable relative to) connected to the front foot 16, and the rear wheel orienting member 14 is movably (vertically movable relative to) connected to the lower side of the rear foot 17. The locking mechanism is disposed between the rider 2 and the front foot 16 or the rear foot 17.

[0066] The stroller further includes a linkage folding device disposed between the front foot 16, the rear foot 17, and the rider 2. The linkage folding device is configured such that when the rider 2 rotates backward and downward from the rearward position, the front foot 16 and the rear foot 17 can be driven to rotate relatively closer through the linkage folding device.

[0067] In this embodiment, the linkage folding device includes a first linkage member 18, a second linkage member 19, and a third linkage member 191. The front side of the first linkage member 18 is pivotally connected to the front foot 16, the rear side of the second linkage member 19 is pivotally connected to the rear foot 17, and the front side is pivotally connected to the first linkage member 18. The upper side of the third linkage member 191 is pivotally connected to the rider 2, and the lower side is pivotally connected to the rear side of the first linkage member 18 or / and the front side of the second linkage member 19.

[0068] When the stroller of the present invention is in the unfolded state, the pivotal connection position of the upper side of the third linkage member 191 and the rider 2 is located above the pivotal connection position of the rider 2 and the rear foot 17; the pivotal connection position of the front side of the first linkage member 18 and the front foot 16 is located below the pivotal connection position of the front foot 16 and the rear foot 17; the pivotal connection position of the rear side of the second linkage member 19 and the rear foot 17 is located below the pivotal connection position of the rear foot 17 and the rider 2 or / and the front foot 16.

[0069] The first linkage member 18 can be set as the seating part of a seat, that is, the first linkage member 18 is the seating part of the seat. It can also be that the first linkage member 18 is the front seating part of a seat, and the second linkage member 19 is the rear seating part of the seat, that is, both the first linkage member 18 and the second linkage member 19 are part of the seating part of a seat. The first linkage member 18 and the second linkage member 19 together form the seating part of a seat for supporting the child's sitting. Therefore, when the stroller of the present invention is folded, the seat is folded together, making the overall folding operation simpler and more convenient.

[0070] In this embodiment, the stroller further includes a connecting pipe 20 whose lower side is connected to the lower bracket 1. The connecting pipe 20 can be used to connect to the periphery of the front side of a seat fabric, and the seat fabric is also connected to the seating part of the seat (not shown in the figure).

[0071] The lower side of the connecting pipe 20 is pivotally connected to the lower bracket 1 and is located on the side of the driving member 6 away from the rider 2. Preferably, a connecting hole is also provided on the lower side of the connecting pipe 20. The connecting member 25 penetrates into the rider 2, passes through the mating square hole and the hole 64, and then penetrates into the connecting hole on the connecting pipe, and then is locked into the connecting member 25 from the other side of the connecting hole by a screw 26, thereby connecting the rider, the lower bracket, the acting member, the driving member and the connecting pipe. That is, the rider, the upper bracket, the acting member, the driving member and the connecting pipe are coaxially pivotally connected.

[0072] The connecting pipe 20 is arranged in cooperation with the rider 2, and the connecting pipe 20 is arranged such that when the stroller is folded, the rider 2 can drive the connecting pipe 20 to rotate together when rotating backward from the rearward position. When the stroller rotates forward from the rearward position, the connecting pipe 20 is not linked, that is, the connecting pipe 20 remains in place.

[0073] The connection mode between the connecting pipe 20 and the lower bracket 1, its connection mode with the seat cloth, and the cooperation mode with the rider 2 can be any known and feasible structure. Since it is not the inventive point of the present invention, it will not be elaborated here.

[0074] The stroller of the present invention further includes an armrest 9, and the rear side of the armrest 9 is connected to the upper side of the lower bracket. And the armrest 9 can be arranged to be detachably connected or relatively rotatably connected to the lower bracket 1. When it is detachably connected, the armrest 9 can be removed after the stroller is folded; when it is relatively rotatably connected, when the stroller is folded, the armrest 9 can be rotated to be close to the front feet 16 and the rear feet 17. The rear side of the armrest 9 can also be arranged to be fixedly connected to the lower bracket 1.

[0075] Those skilled in the art should understand that the above terms such as "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. In the above description, the front is where the front wheel 32 is located, the rear is where the rear wheel 42 is located, the upper is where the rider 2 is located, the lower is where the front wheel 32 and the rear wheel 42 are located, and the rider 2 and the seat backrest tube are respectively located on the left and right sides of the rear foot 17. The above description is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. When the observation visual angle changes, the above orientation or positional relationship will also change accordingly. Therefore, it should not be construed as a limitation to the present invention.

Claims

1. A baby stroller, which includes a lower bracket, a rider pivotally connected to the lower bracket at the lower side, and the rider is configured to be rotatable and convertible between a rearward position and a forward position; characterized in that: The stroller further includes a front wheel set rotatably connected to the front lower side of the lower bracket relative to the horizontal, and a rear wheel set rotatably connected to the rear lower side of the lower bracket relative to the horizontal. Front wheel orientation mechanisms and rear wheel orientation mechanisms for restricting the relative horizontal rotation of the corresponding two are provided between the corresponding sides of the lower bracket and the front wheel set and the rear wheel set respectively. The stroller further includes an acting member rotatably connected to the lower bracket, a front steel wire and a rear steel wire connected to the upper side of the acting member. The lower side of the front steel wire is connected to the front wheel orientation mechanism, and the lower side of the rear steel wire is connected to the rear wheel orientation mechanism. A driving member that can rotate in the same direction therewith is connected to the lower side of the handlebar, and the driving member is cooperatively arranged with the acting member. When the handlebar is switched between the forward position and the backward position, the acting member can rotate with the rotation of the driving member, thereby pulling the front steel wire or the rear steel wire upward, or releasing the upward pulling of the front steel wire or the rear steel wire, so that the front wheel orientation mechanism and the rear wheel orientation mechanism are switched between the unlocked state and the locked state.

2. The stroller for children according to claim 1, characterized in that: When the handlebar rotates from the backward position to the forward position, the acting member rotating in one direction pulls the rear steel wire upward, causing the rear wheel orientation mechanism to switch to the unlocked state, and releasing the pulling of the front steel wire, enabling the front wheel orientation mechanism to switch to the locked state; when the handlebar rotates from the forward position to the backward position, the acting member rotating in the opposite direction pulls the front steel wire upward, causing the front wheel orientation mechanism to switch to the unlocked state, and releasing the pulling of the rear steel wire, enabling the rear wheel orientation mechanism to switch to the locked state; preferably, the stroller is configured to be switchable between the unfolded state and the folded state. When the handlebar is in the backward position, the stroller can be folded, and during folding, the handlebar rotates backward and downward; preferably, the cooperation between the acting member and the driving member is further configured such that the acting member remains stationary when the handlebar rotates backward and downward during the folding process.

3. The stroller for children according to claim 1 or 2, characterized in that: A first elastic member for driving the acting member to rotate is provided between the acting member and the lower bracket; and the cooperation between the acting member and the driving member is further configured such that during the rotation of the handlebar from the backward position to the forward position, the driving member pushes the acting member to rotate in one direction; during the rotation of the handlebar from the forward position to the backward position, the driving member disengages from the pushing of the acting member, and under the action of the first elastic member, the acting member rotates in the opposite direction.

4. The stroller for children according to any one of claims 1 to 3, characterized in that: A first travel groove is eccentrically provided on the acting member, and a driving portion is provided on the driving member. The driving portion is rotatably inserted into the first travel groove; preferably, when the handlebar is in the backward position, the driving portion abuts against the rear end wall of the first travel groove.

5. The stroller for children according to claim 3 or 4, characterized in that: A second travel groove is also eccentrically provided on the acting member, and a first spring seat protrudes from the lower bracket. The first spring seat extends into the second travel groove; one side of the first elastic member is connected to the first spring seat, and the other side is connected to the groove wall on the opposite side of the second travel groove; preferably, the first travel groove and the second travel groove are spaced apart; preferably, the second travel groove is located outside the first travel groove.

6. The stroller for children according to any one of claims 1 to 5, characterized in that: A blocking member is further provided on the lower bracket, and the blocking member is configured such that when the rider is in the backward position, one side of the acting member abuts against the front end of the blocking member, and there is a gap between the other side and the rear end of the blocking member; preferably, when the rider is in the forward position, the other side of the acting member abuts against the rear end of the blocking member, and there is a gap between one side and the front end of the blocking member.

7. The stroller for children according to any one of claims 1 to 6, characterized in that: The acting member and the rider are coaxially pivotally connected to the lower bracket, or the rider is rotatably connected to the lower bracket about a first rotation axis, and the rider is rotatably connected to the lower bracket about a second rotation axis, and the first rotation axis and the second rotation axis are arranged on the same straight line or in parallel; preferably, the lower side of the rider and the acting member are respectively connected to opposite sides of the lower bracket, and at least the driving part of the driving member and the acting member are located on the same side of the lower bracket; preferably, a connecting hole penetrating through left and right is provided on the lower bracket, a through hole penetrating through left and right is provided on the acting member, and the driving member includes a body and the driving part eccentrically arranged on one side of the body; a connecting member is connected to the rider on one side and passes through the connecting hole and the through hole to be connected to the body on the other side, so as to connect the rider, the lower bracket, the acting member and the driving member.

8. The stroller for children according to any one of claims 1 to 7, characterized in that: A receiving cavity is provided on the lower bracket, the acting member is rotatably disposed in the receiving cavity, a front channel for the front steel wire to pass through is provided between the receiving cavity and the front wheel orientation mechanism, and a rear channel for the rear steel wire to pass through is provided between the receiving cavity and the rear wheel orientation mechanism; preferably, a part of the bottom wall of the receiving cavity is recessed to form an avoidance cavity, a connecting portion is convexly provided on the corresponding side of the acting member, and the connecting portion is rotatably inserted into the avoidance cavity, and the upper sides of the front steel wire and the rear steel wire are both connected to the connecting portion; correspondingly, a first channel and a second channel are further provided on the bottom wall of the receiving cavity, the first channel communicates the avoidance cavity with the front channel for the front steel wire to pass through, and the second channel communicates the avoidance cavity with the rear channel for the rear steel wire to pass through; preferably, the first spring seat protrudes from the bottom wall of the receiving cavity; preferably, the blocking member protrudes from the bottom wall of the receiving cavity.

9. The baby stroller according to claim 8, wherein: A rider locking mechanism is provided between the lower side of the rider and the lower bracket. After unlocking the rider locking mechanism, the rider can rotate relative to the lower bracket; preferably, the rider locking mechanism includes a first tooth groove and a second tooth groove respectively provided on the opposite sides of the lower side of the rider and the lower bracket, a gear movably disposed in the first tooth groove and the second tooth groove relative to left and right, and a return spring disposed between the bottom wall of the second tooth groove and the gear. Under the action of the return spring, the gear meshes with the first tooth groove and the second tooth groove at the same time, and the rider locking mechanism is in the locked state, and the rider and the lower bracket cannot rotate relative to each other; preferably, the second tooth groove and the receiving cavity are respectively provided on opposite sides of the lower bracket and communicate with each other through the connecting hole, and the connecting member also passes through the gear.

10. The stroller for children according to any one of claims 1 to 9, characterized in that: The rear wheel orientation mechanism includes a rear wheel orientation member that is relatively movably connected to the lower rear side of the lower bracket, a rear mating portion disposed on the rear wheel set and capable of cooperating with the rear wheel orientation member, and a rear elastic member is disposed between the rear wheel orientation member and the lower rear side of the lower bracket, and the lower side of the rear steel wire is connected to the rear wheel orientation member; preferably, the rear wheel orientation member is arranged to be relatively movably connected to the lower rear side of the lower bracket, and the rear mating portion is arranged as a rear orientation hole with an upward opening; preferably, the front wheel orientation mechanism includes a front wheel orientation member that is relatively movably connected to the lower front side of the lower bracket, a front mating portion disposed on the front wheel set and capable of cooperating with the front wheel orientation member, and a front elastic member is disposed between the front wheel orientation member and the lower front side of the lower bracket, and the lower side of the front steel wire is connected to the front wheel orientation member; preferably, the front wheel orientation member is arranged to be relatively movably connected to the lower front side of the lower bracket, and the front mating portion is arranged as a front orientation hole with an upward opening.

11. The stroller for children according to any one of claims 1 to 10, characterized in that: The lower bracket includes a front foot and a rear foot, the rear side of the front foot is pivotally connected to the front side of the rear foot, and the lower side of the vehicle handle and the actuator are pivotally connected to the front foot or / and the rear foot.

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