Stroller

Abstract

The invention discloses a baby stroller. The front wheel set and the rear wheel set can be horizontally and rotatably connected to the front side and the rear side of the lower bracket; the acting piece can be relatively and rotatably connected to the lower bracket; the torsional spring is arranged between the acting piece and an upper bracket; the upper sides of the first connecting piece and the second connecting piece are connected to the acting piece; a front wheel orientation mechanism and a rear wheel orientation mechanism 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. The lower sides of the first connecting piece and the second connecting piece are connected with the front wheel orientation mechanism and the rear wheel orientation mechanism respectively. The lower side of the handlebar is connected with a driving piece, under the cooperation of the acting piece, the torsional spring and the driving piece, when the handlebar is switched between the forward position and the backward position, the acting piece can rotate together, and then the first connecting piece and the second connecting piece are pulled to move upwards or release upward pulling of the first connecting piece and the second connecting piece; and the front wheel orientation mechanism and the rear wheel orientation mechanism are switched between an unlocking state and a locking state.

Description

Technical Field

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

[0002] Baby strollers can be used to carry infants. The infant sits on the seat of the baby stroller, and the parents push the baby stroller forward, thus reducing the burden of holding the baby for the parents. Therefore, baby strollers are widely used in families with children.

[0003] Some baby strollers are configured such that the handlebar can be rotated back and forth between a forward position and a rearward position. When the handlebar is rotated to the forward position, the child in the baby stroller faces the parents; when the handlebar is rotated to the rearward position, the child in the baby stroller faces forward like the parents. Such a setting makes it more convenient for parents to take care of the child.

[0004] However, for traditional baby strollers, some only have the front wheels configured to be horizontally rotatable, i.e., rotatable 360 degrees around the vertical axis, and the rear wheels cannot be horizontally rotated. Thus, when the handlebar is 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 smoothly and safely.

[0005] Some baby strollers have both the front wheels and the rear wheels configured to be horizontally rotatable, but in the corresponding wheel seats, there are vertically movable orientation members, and corresponding downward-opening orientation grooves are provided on the front feet / rear feet. When it is necessary to make the front wheels and the rear wheels non-horizontally rotatable, the orientation members need to be moved upward before or after the handlebar is reversed so that they engage with the corresponding orientation grooves on the front feet / rear feet; conversely, the orientation members are moved downward to disengage from the orientation grooves. This setting makes the operation 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-mentioned drawbacks and provide a baby stroller in which both the front wheels and the rear wheels are configured to be horizontally rotatable, and when the handlebar is rotated to the forward position, the front wheel set can be linked to be converted to a state where it cannot rotate horizontally relative to each other, and the rear wheel set can be linked to be converted to a state where it can rotate horizontally relative to each other; when the handlebar is rotated to the rearward position, the front wheels can be linked to be converted to a state where they can rotate horizontally relative to each other, and the rear wheel set can be linked to be converted to 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, which includes a lower bracket and a handlebar pivotally connected to the lower bracket on the lower side, and the handlebar is configured to be rotatable between a rearward position and a forward position;

[0009] The child stroller also includes a front wheel group and a rear wheel group connected to the front lower side of the lower bracket and the rear lower side of the lower bracket respectively and can be relatively horizontally rotated, and a front wheel orientation mechanism and a rear wheel orientation mechanism that can limit the relative horizontal rotation of the two are respectively arranged between the corresponding sides of the lower bracket and the front wheel group and the rear wheel group;

[0010] The child stroller also includes an actuating member rotatably connected to the lower bracket, a torsion spring connected between the actuating member and the lower bracket, a first connecting member and a second connecting member connected to the actuating member on the upper side, the lower side of the first connecting member being connected to the front wheel orientation mechanism, and the lower side of the second connecting member being connected to the rear wheel orientation mechanism;

[0011] And with the cooperation of the rider, the driving member, the torsion spring and the operating member, when the rider rotates and changes direction between the forward position and the rearward position, the operating member also rotates, and the rotation of the operating member links the first connecting member and the second connecting member; when the rider rotates from the rearward position to the forward position, the second connecting member is in a state of being pulled upward by the operating member, and the operating member releases the upward pull on the first connecting member, so that the front wheel orientation mechanism can be in a locked state and the rear wheel orientation mechanism is in an unlocked state; when the rider rotates from the forward position to the rearward position, the first connecting member is in a state of being pulled upward by the operating member, and the operating member releases the upward pull on the second connecting member, so that the rear wheel orientation mechanism can be in a locked state and the front wheel orientation mechanism is in an unlocked state.

[0012] The operating member, the first connecting member and the second connecting member are also configured so that, when the child stroller is in the unfolded state and the rider rotates to an intermediate position between the forward position and the rearward position, the first connecting member and the second connecting member are both in a state of being pulled upward by the operating member, so that the front wheel orientation mechanism and the rear wheel orientation mechanism are both in an unlocked state.

[0013] The cooperation among the rider, the driving member, the torsion spring and the operating member is also arranged so that when the stroller is folded and the rider rotates downward, the operating member does not rotate, so that the first connecting member and the second connecting member remain in the state before the stroller is folded, and the front wheel orientation mechanism and the rear wheel orientation mechanism also remain in the state before the stroller is folded.

[0014] The driving member is configured to rotate in the same direction as the rider, the action member is provided with a first stroke groove, the driving member is provided with a driving portion, and the driving portion can relatively rotate and extend into the first stroke groove; preferably, the driving member includes a main body and the driving portion protruding from the main body toward the action member, and the main body is located on the side of the action member away from the upper bracket.

[0015] The cooperation between the driving part and the first stroke groove is configured such that when the rider is in one of the forward position and the rearward position, the driving part abuts against the side end wall corresponding to the first stroke groove, and when the rider rotates to the other direction, the driving part can drive the actuating member to rotate by pushing the side end wall corresponding to the first stroke groove, and the torsion spring is twisted due to the rotation of the actuating member; when the rider rotates from the other direction position to one of the direction positions, the driving part disengages from the push on the side end wall corresponding to the first stroke groove, and under the action of the torsion force of the torsion spring, the actuating member rotates in the opposite direction; preferably, when the stroller is folded and the rider rotates downward, the driving part rotates and moves in the first stroke groove, and disengages from the push on any side end wall of the first stroke groove.

[0016] When the rider is in the rearward position, the driving portion abuts against the rear end wall of the first stroke groove, and when the rider rotates to the forward position, the driving portion drives the actuator to rotate by pushing the rear end wall; preferably, the stroller is configured so that when the rider is in the rearward position, the stroller can be folded and the rider rotates rearward and downward.

[0017] The upper bracket is recessed with an arc-shaped limit groove which is not connected end to end, and the action member is at least partially rotatably placed in the arc-shaped limit groove; preferably, when the rider is in one of the forward position and the rearward position, under the action of the torsion spring, the portion of the action member located in the arc-shaped limit groove abuts against the groove wall on one side of the arc-shaped limit groove; preferably, when the rider rotates to the other direction position, the action member rotates until the portion thereof located in the arc-shaped limit groove abuts against the groove wall on the other side of the arc-shaped limit groove; preferably, when the rider is in the rearward position, under the action of the torsion spring, the portion of the action member located in the arc-shaped limit groove abuts against the groove wall on one side of the arc-shaped limit groove; when the rider rotates to the forward position, the portion of the action member located in the arc-shaped limit groove abuts against the groove wall on the other side of the arc-shaped limit groove.

[0018] The acting member includes a main body and an acting part arranged on one side of the main body, the acting part can be relatively rotatably placed in the arc-shaped limit groove, and the first travel groove is arranged on the side of the main body away from the acting part; preferably, the first connecting member and the second connecting member are both connected to the acting part, and correspondingly, the upper bracket is recessed with a first channel and a second channel connected to the arc-shaped limit groove on the side where the arc-shaped limit groove is arranged, and the first channel and the second channel are respectively used for routing the first connecting member and the second connecting member.

[0019] The upper bracket is also recessed with a receiving groove, the torsion spring is placed in the receiving groove, and one end of the torsion spring is connected to the side wall or bottom wall of the receiving groove, and the other end is connected to the acting member; preferably, the arc-shaped limiting groove is recessed on the outer edge of the receiving groove facing one end of the acting member, and the arc-shaped groove is connected to the receiving groove; preferably, the receiving groove and the arc-shaped limiting groove are coaxially arranged.

[0020] The driving member includes a main body and the driving portion protruding from the main body toward the side of the working member, and the main body is located on the side of the working member away from the upper bracket; preferably, the rider and the working member are respectively pivotally connected to the two sides of the upper bracket away from each other, and the upper bracket is provided with a through hole penetrating the bottom wall of the accommodating groove on the left and right sides, and the working member is also provided with a connecting hole penetrating on the left and right sides, and the through hole and the connecting hole are coaxially arranged.

[0021] The lower bracket includes a front foot and a rear foot, and the rear side of the front foot is pivotally connected to the front side of the rear foot; the front wheel group is connected to the front lower side of the front foot in a relatively horizontally rotatable manner, and the front wheel orientation device is arranged between the lower side of the front foot and the front wheel group; the rear wheel group is connected to the front lower side of the rear foot in a relatively horizontally rotatable manner, and the rear wheel orientation device is arranged between the lower side of the rear foot and the rear wheel group.

[0022] The rear-wheel orientation mechanism includes a rear-wheel orientation piece which can be relatively movably connected to the lower side of the rear foot, a second matching portion which can match with the rear-wheel orientation piece and is arranged on the rear wheel assembly, and a rear elastic piece is arranged between the rear-wheel orientation piece and the rear foot, and the lower side of the second connecting piece is connected to the rear-wheel orientation piece; preferably, the rear-wheel orientation piece is arranged to be connected to the lower side of the rear foot so as to be relatively movably up and down, and the second matching portion is arranged as an orientation hole 2 which opens upward; preferably, the front-wheel orientation mechanism includes a front-wheel orientation piece which can be relatively movably connected to the lower side of the front foot, a first matching portion which can match with the front-wheel orientation piece and is arranged on the front wheel assembly, and a front elastic piece is arranged between the front-wheel orientation piece and the front lower side of the lower bracket, and the lower side of the first connecting piece is connected to the front-wheel orientation piece; preferably, the front-wheel orientation piece is arranged to be connected to the lower side of the front foot so as to be relatively movably up and down, and the first matching portion is arranged as an orientation hole 1 which opens upward.

[0023] The lower side of the rider is pivotally connected to the front foot and / or the rear foot, and correspondingly, the action member is relatively rotatably connected to the upper side of the front foot and / or the rear foot.

[0024] Because the present invention adopts the above technical solution, it has the following beneficial effects:

[0025] 1. When the rider rotates to the forward position, the front wheel set can be linked to switch to a state where it cannot rotate horizontally relative to each other, and the rear wheel set can be linked to switch to a state where it can rotate horizontally relative to each other; when the rider rotates to the backward position, the front wheels can be linked to switch to a state where they can rotate horizontally relative to each other, and the rear wheel set can be linked to switch to a state where it cannot rotate horizontally relative to each other. In this way, the orientation of the front wheel set and the rear wheel set can be automatically switched with the rotation of the rider without additional operations, so the operation of the orientation of the front wheel set and the rear wheel set is very simple;

[0026] 2. Whether the rider is in the forward position or the backward position, when the parents push the stroller forward through the rider, the wheel set on the front side in the forward direction of the stroller can rotate horizontally, and the wheel set on the rear side can only go straight. Therefore, when the 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 keeps its original moving direction, which can make the movement of the stroller smoother and safer;

[0027] 3. Because when the stroller is in the unfolded state and the rider rotates to the middle position between the forward position and the backward position, both the first connecting piece and the second connecting piece are in a state of being pulled upward by the acting piece, so the front wheel orientation mechanism and the rear wheel orientation mechanism are both in an unlocked state, and further, both the front wheel set and the rear wheel set are in a state where they can rotate horizontally. At this time, the entire stroller can also be rotated 180 degrees, so that the original action of rotating the rider forward becomes rotating the rider in the direction of oneself, making the child in the stroller face oneself; with such a setting, it also avoids the trouble that the caregiver of the child has to run to change positions with the change of the direction of the rider, thus making the operation more convenient. Brief Description of the Drawings

[0028] Figure 1 It is a three-dimensional schematic diagram of the stroller of the present invention in the unfolded state when the rider is in the backward position;

[0029] Figure 2 It is a plan schematic diagram of the stroller of the present invention in the unfolded state when the rider is in the forward position;

[0030] Figure 3 It is a partially exploded enlarged schematic diagram of the rear wheel set of the stroller of the present invention and the lower side of the rear foot;

[0031] Figure 4 It is according to Figure 2 The enlarged sectional view in the B-B direction in;

[0032] Figure 5 It is according to Figure 1 The enlarged view of part A in;

[0033] Figure 6 It is according to Figure 1 The exploded enlarged view of part A in;

[0034] Figure 7 is a schematic enlarged view of a cross-section in the C-C direction in Figure 5 ;

[0035] Figure 8 is an enlarged schematic view of an acting member of the baby stroller of the present invention;

[0036] Figure 9 is an enlarged schematic view of another angle of the combination of the acting member, the first connecting member and the second connecting member of the baby stroller of the present invention;

[0037] Figure 10 is an enlarged schematic view of a driving member of the baby stroller of the present invention;

[0038] Figure 11 is according to Figure 5 exploded enlarged schematic view;

[0039] Figure 12 is according to Figure 5 exploded enlarged schematic view of another angle;

[0040] Figure 13 is an enlarged schematic view of a cross-section of the combination of the rider, the front foot, the rear foot, the acting member and the driving member of the baby stroller of the present invention when the rider is in the rear-facing position;

[0041] Figure 14 is an enlarged schematic view of a cross-section of the combination of the rider, the front foot, the rear foot, the acting member and the driving member of the baby stroller of the present invention when the rider is in the forward-facing position;

[0042] Figure 15 is a schematic view during the folding process of the baby stroller of the present invention;

[0043] Figure 16 is an enlarged schematic view of a cross-section of the combination of the rider, the front foot, the rear foot, the acting member and the driving member during the folding process of the baby stroller of the present invention. Detailed embodiments

[0044] Such as Figures 1 to 16As shown, the present invention discloses a baby stroller that can be switched 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 arranged to be rotatable and reversible between a rear-facing position and a forward-facing position; the baby stroller further includes a front wheel set 3 and a rear wheel set 4 that are respectively rotatably connected to the front lower side and 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 of 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, 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, 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 for restricting the relative horizontal rotation of the two is provided between the front lower side of the lower bracket 1 and the front wheel set 3, and a rear wheel orientation mechanism for restricting the relative horizontal rotation of the two is provided between the rear lower side of the lower bracket 1 and the rear wheel set 4;

[0045] The baby stroller further includes an acting member 5 connected to the lower bracket 1, a torsion spring 50 connected between the acting member 5 and the lower bracket 1, a first connecting member 51 connected to the upper side of the acting member 5, and a second connecting member 52. The lower side of the first connecting member 51 is connected to the front wheel orientation mechanism, and the lower side of the second connecting member 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 arranged in cooperation with the acting member 5; under the cooperation of the acting member 5, the torsion spring 50 and the driving member 6, when the stroller body 2 rotates and reverses between the forward-facing position and the rear-facing position, the acting member 5 also rotates, and the rotation of the acting member 5 will drive the first connecting member and the second connecting member;

[0046] When the stroller body 2 rotates from the rear-facing position to the forward-facing position, the second connecting member 52 is in a state of being pulled upward by the acting member, and the acting member 5 releases the upward pull on the first connecting member 51, so that the front wheel orientation mechanism can be in a locked state, the rear wheel orientation mechanism is in an unlocked state, the rear wheel set can rotate horizontally relative to the front lower side of the lower bracket, and the front wheel set is in an oriented state and cannot rotate horizontally relative to the front lower side of the lower bracket; when the stroller body 2 rotates from the forward-facing position to the rear-facing position, the first connecting member 51 is in a state of being pulled upward by the acting member, and the acting member 5 releases the upward pull on the second connecting member 52, so that the rear wheel orientation mechanism can be in a locked state, and the front wheel orientation mechanism is in an unlocked state, so that the rear wheel set is in an oriented state and cannot rotate horizontally relative to the front lower side of the lower bracket, and the front wheel set can rotate horizontally relative to the front lower side of the lower bracket.

[0047] Preferably, the actuator 5, the first connecting member 51 and the second connecting member 52 are further arranged such that when the stroller is in the unfolded state and the rider 2 rotates to an intermediate position between the forward position and the backward position, both the first connecting member 51 and the second connecting member 52 are in a state of being pulled upward by the actuator, so that both the front wheel orientation mechanism and the rear wheel orientation mechanism are in an unlocked state, and further both the front wheel set and the rear wheel set are in a state where they can be respectively horizontal relative to the front lower side and the rear lower side of the lower bracket.

[0048] Further, the cooperation of the rider 2, the driving member 6, the torsion spring 50 and the actuator 5 is also arranged such that when the stroller is folded and the rider 2 rotates downward, the actuator 5 does not rotate, so that the first connecting member 51 and the second connecting member 52 remain in the state before the stroller is folded, and the front wheel orientation mechanism and the rear wheel orientation mechanism also remain in the state before the stroller is folded.

[0049] Combined with Figure 3 、 4 As shown, the rear wheel orientation mechanism includes a rear wheel orientation member 11 movably connected to the rear lower side of the lower bracket 1, a second mating portion 43 provided on the rear wheel set 4 and capable of mating with the rear wheel orientation member 11, and a rear elastic member 44 is provided between the rear wheel orientation member 11 and the rear lower side of the lower bracket 1, and the lower side of the second connecting member 52 is connected to the rear wheel orientation member 11. When the actuator 5 releases the upward pull on the second connecting member 52, under the action of the rear elastic member 44, when the rear wheel orientation member 11 moves relative to the rear lower side of the lower bracket 1 and mates with the second mating portion 43, the rear wheel orientation mechanism is in a locked state, and the rear wheel set 4 is in an oriented state and cannot rotate horizontally relative to the rear lower side of the lower bracket 1; when the second connecting member 52 is pulled upward by the actuator 5, the rear wheel orientation member 11 is pulled by the second connecting member 52 to move relative to the rear lower side of the lower bracket 1 and disengages from the second mating portion 43, and the rear wheel orientation mechanism is unlocked, and the rear wheel set 4 can rotate horizontally relative to the rear lower side of the lower bracket 1.

[0050] In this embodiment, the rear wheel orientation member 11 is arranged to be movably connected to the rear lower side of the lower bracket 1 in a vertically movable manner, and the second mating portion 43 is arranged as an upwardly open orientation hole two 43. The rear wheel set 4 includes a rear wheel seat 41 rotatably connected to the rear lower side of the lower bracket 1 horizontally and a rear wheel 42 connected to the rear wheel seat 41; the orientation hole two 43 is provided on the rear wheel seat 41.

[0051] Similarly, the front wheel orientation mechanism includes a front wheel orientation member movably connected to the front lower side of the lower bracket 1, and a first mating portion (not shown in the figure) provided on the front wheel set 3 and adapted to cooperate with the front wheel orientation member. An elastic member is provided between the front wheel orientation member and the front lower side of the lower bracket 1, and the lower side of the first connecting member 51 is connected to the front wheel orientation member. When the actuator 5 releases the upward pulling force on the first connecting member 51, under the action of the elastic member, the front wheel orientation member moves relative to the front lower side of the lower bracket 1 and cooperates with the first mating portion, and the front wheel orientation mechanism is in a locked state, and the front wheel set 3 is in an oriented state and cannot horizontally rotate relative to the front lower side of the lower bracket 1. When the first connecting member 51 moves upward and pulls the front wheel orientation member to move relative to the front lower side of the lower bracket 1 and disengages from the first mating portion, the front wheel orientation mechanism is unlocked, and the front wheel set 3 can horizontally rotate relative to the front lower side of the lower bracket 1.

[0052] The front wheel orientation member is configured to be movably connected to the front lower side of the lower bracket 1 in a vertically movable manner, and the first mating portion is configured as an upwardly opening orientation hole one (not shown in the figure). The front wheel set 3 includes a front wheel seat 31 rotatably connected to the front lower side of the lower bracket 1 in a horizontally rotatable manner and a front wheel 32 connected to the front wheel seat 31; the orientation hole one is provided on the front wheel seat 31.

[0053] A downwardly opening receiving hole 10 is provided on the rear lower side of the lower bracket 1, and the upper side of the rear wheel orientation member 11 is movably placed in the receiving hole 10 in a vertically movable manner, so that the lower side of the rear wheel orientation member 11 can extend downward outside the lower side of the receiving hole and extend into the orientation hole two 43. The rear elastic member 44 is placed between the top wall of the receiving hole and the rear wheel orientation member 11. Similarly, the front lower side of the lower bracket 1 and the front wheel orientation member and the front elastic member can also adopt this setting.

[0054] Preferably, the actuator 5 and the rider 2 are coaxially pivotally connected to the lower bracket 1. In other embodiments, the rider 2 can also be rotatably connected to the lower bracket 1 about a first rotation axis, and the rider 2 can be rotatably connected to the lower bracket 1 about a second rotation axis, and the two rotation axes are arranged on the same straight line or in parallel.

[0055] In this embodiment, the driving member 6 is arranged to rotate in the same direction as the rider 2. A first stroke groove 53 is provided on the acting member 5, and a driving portion 61 is provided on the driving member 6. The driving portion 61 rotatably extends into the first stroke groove 53. Preferably, the cooperation between the driving portion 61 and the first stroke groove 53 is arranged such that when the rider 2 is in one of the forward position and the backward position, the driving portion 61 abuts against the corresponding side end wall of the first stroke groove 53. When the rider 2 rotates in the other direction, the driving portion 61 can drive the acting member 5 to rotate by pushing the corresponding side end wall of the first stroke groove 53, and the torsion spring 50 is twisted due to the rotation of the acting member 5. With such an arrangement, when the rider 2 rotates from the other direction position to one of the direction positions, the driving portion 61 rotates in a direction away from the end wall, that is, the driving portion 61 disengages from the push on the corresponding side end wall of the first stroke groove, and thus no longer forms a thrust on the end wall. At this time, under the restoring force of the torsion spring 50, the acting member 5 will automatically rotate in the reverse direction, so that the driving portion 61 will still contact the end wall.

[0056] Further, when the baby stroller is folded and the rider 2 rotates downward, the driving portion 61 rotates and moves in the first stroke groove 53 and disengages from the push on any side end wall of the first stroke groove 53

[0057] In this embodiment, the cooperation between the driving portion 61 and the first stroke groove 53 is arranged such that when the rider 2 is in the backward position, the driving portion 61 abuts against the rear end wall 530 of the first stroke groove 53 (as Figure 13 shown), so that as long as the rider 2 rotates forward, the driving portion 61 can immediately drive the acting member 5 to rotate by pushing the rear end wall, resulting in a faster response. In other embodiments, it may also be that when the rider 2 is in the backward position, the driving portion 61 may not abut against the rear end wall of the first stroke groove 53, but there is a certain distance between the two. Thus, 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. This method is essentially the same as the technical solution in which the driving portion 61 abuts against the rear end wall of the first stroke groove 53.

[0058] Preferably, an arc-shaped limiting groove 12 with non-connected head and tail is concavely provided on one side of the lower bracket 1, and at least a part of the acting member 5 is rotatably disposed in the arc-shaped limiting groove 12; when the rider 2 is in one of the forward position and the backward position, under the action of the torsion spring 50, the part of the acting member 5 located in the arc-shaped limiting groove 12 abuts against the groove wall on one side of the arc-shaped limiting groove 12; when the rider 2 rotates to the other facing position, the acting member 5 rotates to make the part of it located in the arc-shaped limiting groove 12 abut against the groove wall on the other side of the arc-shaped limiting groove 12. In this way, the front-back commutation operation of the rider is more intuitive, and the rotation of the acting member can also be made smoother.

[0059] In this embodiment, when the rider 2 is in the backward position, under the action of the torsion spring 50, the part of the acting member 5 located in the arc-shaped limiting groove 12 abuts against the groove wall 121 on one side of the arc-shaped limiting groove 12; when the rider 2 rotates to the forward position, the part of the acting member 5 located in the arc-shaped limiting groove abuts against the groove wall 122 on the other side in the arc-shaped limiting groove 12.

[0060] The arc-shaped groove communicates with the receiving groove 11 at the outer edge of one end of the receiving groove 11.

[0061] A receiving groove 11 is further concavely provided on one side of the lower bracket 1. The torsion spring 50 is disposed in the receiving groove 11, and one end of the torsion spring 50 is connected to the side wall or the bottom wall of the receiving groove 11, and the other end 501 is connected to the acting member 5. In this way, the acting member 5 is equivalent to blocking the torsion spring 50 in the receiving groove 11, which not only facilitates installation, but also can prevent the connection of the torsion spring 50 from falling off, thus better ensuring the function of the torsion spring 50, that is, ensuring the rotation of the acting member as required, and further ensuring the unlocking and locking of the front-wheel orientation mechanism and the rear-wheel orientation mechanism.

[0062] In this embodiment, the arc-shaped limiting groove 12 is concavely provided on the outer edge of the receiving groove 11 facing the acting member 5, and the arc-shaped groove 12 communicates with the receiving groove 11, so that a part of the acting member 5 is not blocked by the bottom wall of the arc-shaped groove 12 and is exposed in front of the receiving groove 11, which is convenient for connecting the other end 501 of the torsion spring.

[0063] Preferably, the arc-shaped limiting groove 12 and the receiving groove 11 are coaxially arranged, so that the rotation of the acting member 5 and the torsion of the torsion spring 50 will not be misaligned.

[0064] In this embodiment, the action member 5 includes a body 54 and an action portion 55 disposed on one side of the body 54, the action portion 55 can be relatively rotatably disposed in the arc-shaped limiting groove 12, and the first travel groove 53 is disposed on the side of the body 54 away from the action portion 55. Preferably, the first connecting member 51 and the second connecting member 52 are both connected to the action portion 55, and correspondingly, the lower bracket 1 is provided with a first channel 13 and a second channel 14 connected to the arc-shaped limiting groove 12 on the side provided with the arc-shaped limiting groove 12, and the first channel 13 and the second channel 14 are respectively provided for the first connecting member 51 and the second connecting member 52 to be routed, so that the first connecting member 51 and the second connecting member 52 connected to the action 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 11) through the first channel 13 and the second channel 14 respectively. With such arrangement, the portions of the first connecting member 51 and the second connecting member 52 extending outside the front channel and the rear channel will only move within the arc-shaped limiting groove 12, the first channel 13, and the second channel 14, so that when the actuator 5 rotates, it will not interfere with the first connecting member 51 and the second connecting member 52 to affect the upward movement and release of the first connecting member 51 and the second connecting member 52.

[0065] The driving member 6 comprises a main body 62 and a driving portion 61 protruding from the main body 62 on a side facing the action member. The main body 62 is located on a side of the action member 5 facing away from the upper bracket 1 .

[0066] The lower bracket 1 is provided with a receiving cavity 15 (such as Figure 7 As shown in the figure, the arc-shaped limiting groove 12 and the receiving groove 11, the first channel 13 and the second channel 14 are all recessed from the bottom wall of the receiving chamber 15, and the main body 62 and the driving part 61 of the driving member 6 and the action member body 54 are all located in the receiving chamber 15. In this way, there is installation space, which makes it more convenient to assemble the various components.

[0067] In this embodiment, the rider 2 and the action member 5 are connected to opposite sides of the lower bracket 1, respectively, and the main body 62 of the driving member 6 and the driving part 61 and the action member 5 are located on the same side of the lower bracket 1. The lower bracket 1 is provided with a through hole 110 that penetrates the bottom wall of the receiving groove 11 from left to right, and the action member 5 is also provided with a connecting hole 55 that penetrates from left to right, and the through hole 110 is coaxially arranged with the connecting hole 55, and a connecting member 25 is connected to the rider 2 and then passes through the through hole 110 and the connecting hole 55 to be connected to the driving member 6.

[0068] Further, the driving member 6 further includes a mating table 63 extending from the main body 62 towards the side of the rider. On the side of the rider 2 facing the acting member 5, an assembling portion 22 is provided. Among the assembling portion 22 and the mating table 63, a mating square hole 221 is recessed on one side facing the other, the other is square, and the other passes through the through hole 110 and the connecting hole 55 and then extends into the mating square hole 221. Preferably, a limiting groove 222 is provided on the inner wall of the mating square hole 221, and a corresponding limiting protrusion 64 is protruded on the outer wall of the other. The limiting protrusion 64 extends into the limiting groove 222. With such a setting, not only can the rider 2 drive the rotation of the acting member 5 more synchronously when rotating, but also the assembly positioning of the rider 2 and the acting member 5 is facilitated.

[0069] The driving member 6 is provided with a hole 65 penetrating left and right, and the hole 65 penetrates through the main body 62 and the mating table 63; the connecting member 25 penetrates into the rider 2, passes through the mating square hole 221 and then into the hole 65, and then is locked into the connecting member 25 from the other side of the hole 65 by a screw 26, thereby connecting the rider 2, the lower bracket 1 and the acting member 5 and the driving member 6. In other embodiments, the connection between the rider 2 and the driving member 6 can also adopt other known and feasible structures as long as they can rotate in the same direction together and do not interfere with other parts.

[0070] The driving portion 61 is located outside the mating table 63, so that interference will not occur.

[0071] In other embodiments, it may be that the rider 2, the driving member 6 and the acting member 5 are all connected to the same side of the lower bracket 1, and the connection method is adaptively modified. When set in this way, the driving member can also be integrally formed on the lower side of the rider 2.

[0072] 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 front wheel set 3 is rotatably connected to the front lower side of the front foot 16 relative to the horizontal. The front wheel orientation device is arranged between the lower side of the front foot and the front wheel set 3. The rear wheel set 4 is rotatably connected to the front lower side of the rear foot 17 relative to the horizontal. The rear wheel orientation device is arranged between the lower side of the rear foot and the rear wheel set 4. The front wheel orientation member is movably (vertically movable relative to) connected to the lower side of the front foot 16, and the rear wheel orientation member 11 is movably (vertically movable relative to) connected to the lower side of the rear foot 17.

[0073] The lower side of the rider 2 is pivotally connected to the front foot 16 or / and the rear foot 17, and the actuating member 5 is rotatably connected to the upper side of the front foot 16 or / and the rear foot 17. In this embodiment, the lower side of the rider 2 is pivotally connected to the rear foot 17, and the actuating member 5 is also rotatably connected to the rear foot 17. The receiving groove 11, the arc-shaped limiting groove 12, the first channel 13, and the second channel 14 are provided on the rear foot. Similarly, the same applies to the front foot. Correspondingly, the locking mechanism is provided between the rider 2 and the front foot 16 or the rear foot 17.

[0074] Combined Figure 6 , 8 , as shown in FIGS. 13, when the stroller is in the unfolded state and the rider 2 is in the rear-facing state, the driving portion 61 of the driving member 6 abuts against the rear end wall of the first stroke groove 53 of the actuating member 5, and one end of the acting portion 55 abuts against the groove wall 121 on one side of the arc-shaped limiting groove 12. The first connecting member 51 is in a state of being pulled upward, and the second connecting member 52 is in a released state. Thus, the first connecting member 51 pulls the front wheel orienting member upward so that it disengages from the first orienting hole on the front wheel seat, and the front wheel orienting mechanism is in an unlocked state. The front wheel set 3 can rotate horizontally relative to the front foot, that is, the front wheel 32 can rotate horizontally relative to the front foot, and the front elastic member is in a compressed state. And because the second connecting member 52 is in a released state, under the action of the rear elastic member 44, when the rear wheel orienting member 11 aligns with the second orienting hole 43 on the rear wheel seat 41, the rear wheel orienting member moves downward and the lower side extends into the second orienting hole 43 on the rear wheel seat 41 (as shown in Figure 4 ), the rear wheel orienting mechanism is in a locked state, and the rear wheel set 4 cannot rotate horizontally relative to the rear foot, that is, the rear wheel 42 cannot rotate horizontally relative to the rear foot. 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 rotate horizontally. Therefore, when pushing the rider 2 to move the stroller forward, if there are slight obstacles on the road, the front wheel 32 can rotate horizontally to avoid them, while the rear wheel maintains its original traveling direction, which can make the traveling of the stroller smoother and safer.

[0075] Assume that the caregiver stands behind the stroller. When changing the orientation of the rider 2, rotate the rider 2 forward, and the driving member 6 is driven to rotate in the same direction. Thus, the driving portion 61 drives the actuating member 5 to rotate together by pushing the rear end wall 530 of the first stroke groove 53 of the actuating member 5. As the actuating member 5 rotates, the torsion spring 50 is twisted, and the acting portion 55 of the actuating member 5 rotates in the arc-shaped limiting groove 12. And as the actuating member 5 rotates, the first connecting member 51 is gradually released, and the second connecting member 52 is gradually pulled upward. Thus, the rear wheel orienting member 11 is pulled to move upward, and under the action of the front elastic member, the front wheel orienting member always maintains a downward moving tendency.

[0076] When the rider 2 rotates to the middle position between the backward position and the forward position, the second connecting member is in a state of being pulled upward by the acting member. Although the first connecting member is in the process of being released, it is not completely released, so its overall state is still in a state of being pulled upward. As a result, both the front-wheel orientation mechanism and the rear-wheel orientation mechanism are in an unlocked state, and then both the front-wheel set and the rear-wheel set can rotate horizontally by 360 degrees. At this time, the entire stroller can be rotated by 180 degrees; after rotation, the original action of rotating the rider 2 forward before becomes rotating the rider 2 in the direction of the caregiver himself, so that the child in the stroller faces the caregiver face to face; with such a setting, it avoids the trouble that the caregiver himself has to run to change positions with the change of the direction of the rider 2, making the operation more convenient.

[0077] When the rider 2 rotates to the forward position, the rear-wheel orientation member 11 moves upward so that the lower side of it completely disengages from the second orientation hole 43 of the rear-wheel seat 41, thus unlocking the rear-wheel orientation mechanism, and the rear wheel 42 can rotate horizontally relative to the rear foot 17; when the front-wheel seat 31 rotates to align the first orientation hole on it with the front-wheel orientation member, the front-wheel orientation member moves downward and the lower side extends into the first orientation hole of the front-wheel seat 31, and the front-wheel orientation mechanism is in an unlocked state, that is, the front wheel 3 is in an oriented state and cannot rotate horizontally relative to the front foot 16.

[0078] In this way, when the rider 2 is in the forward position and the parents push the stroller forward by pushing the rider 2, it is equivalent to the rear wheel 42 being in the front and being able to rotate horizontally relative to the lower side of the rear part of the lower bracket 1, while the front wheel 32 is in the rear and can only go straight. If there are some slight obstacles on the road, the rear wheel 42 on the front side can rotate horizontally to avoid them, while the front wheel 32 on the rear side maintains the original traveling direction, which can make the stroller travel more smoothly and safely.

[0079] And during the process of the rider 3 rotating from the backward position to the forward position, the driving part 61 of the driving part 6 always abuts against the rear end wall 530 of the first stroke groove 53.

[0080] When the rider 2 in the forward position needs to be rotated backward to the backward position, rotate the rider 2 in the direction of the rear wheel 40 (from the perspective of the caregiver pushing the rider 2, it is still the forward direction), driving the driving part 61 of the driving part 6 to rotate in the same direction, so that the driving part 61 no longer exerts a pushing force on the rear wall 530 of the first stroke groove 53 of the acting member 5. In this way, under the restoring force of the torsion spring 50, the acting member 5 is driven to rotate in the reverse direction. Because the acting member 5 rotates in this way, the first connecting member 51 is pulled upward, and the second connecting member 52 is gradually released, thereby driving the front-wheel orientation member to move upward, so that the rear-wheel orientation member 11 always maintains a downward movement trend. Until the rider 2 rotates to the backward position, the rear-wheel orientation mechanism is locked again, and the front-wheel orientation mechanism is unlocked again.

[0081] Similarly, when the rider 2 rotates from the forward position to the middle position between the backward position and the forward position, both the first connecting member and the second connecting member are in a state of being pulled upward by the actuating member 5. As a result, both the front wheel orientation mechanism and the rear wheel orientation mechanism are in an unlocked state, and further, both the front wheel set and the rear wheel set are in a state where they can rotate horizontally. At this time, the entire stroller can also be rotated 180 degrees, so that the original action of rotating the rider 2 forward becomes rotating the rider 2 in the direction of oneself, making the child in the stroller face oneself. With such a setting, it also avoids the trouble that the caregiver of the child has to run and change positions along with the reversal of the rider 2, thus making the operation more convenient.

[0082] As described above, when the rider 2 is in the backward position, the front wheel orientation mechanism is in an unlocked state and the rear wheel orientation mechanism is in a 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 a locked state and the rear wheel orientation mechanism is in an unlocked state, so that the original front wheel 32 cannot rotate horizontally and the original rear wheel 42 can only move straight forward. That is to say, no matter what direction the rider 2 is in, when the parents push the stroller forward through the rider 2, the wheel set on the front side in the forward direction of the stroller can rotate horizontally, and the wheel set on the rear side cannot rotate horizontally. With such a setting, when the stroller is moving forward, if there are some slight obstacles on the road, such as small stones, etc., the front wheel set can rotate horizontally to avoid them, while the rear wheel set maintains the original traveling direction, which can make the traveling of the stroller smoother and safer. Moreover, to achieve the above functions, no additional operation is required. With the cooperation of the rider, the driving member, the actuating member, and the torsion spring 50, as long as the rider 2 is rotated, the relevant components can be automatically linked to achieve it, so the operation is very simple; and because when the rider 2 rotates to the middle position between the forward position and the backward position, both the first connecting member 51 and the second connecting member 52 are in a state of being pulled upward by the actuating member, the caregiver of the child can complete the reversal of the rider 2 without running and changing positions, thus making the operation more convenient.

[0083] The stroller of the present invention is also set such that when the rider 2 is in the backward position, the stroller can be folded, and when folding, the rider 2 rotates backward and downward. And because the driving part of the driving member 6 and the first stroke groove 53 of the actuating member are arranged in the above-mentioned cooperation, when the rider 2 rotates backward and downward during the folding process (as Figure 15 shown), the driving member 6 rotates in the same direction accordingly, and the driving part 61 of the driving member 6 rotates along the first stroke groove 53 of the actuating member 5 (as Figure 16 shown). And because one end of the actuating part 55 of the actuating member abuts against the groove wall on the corresponding side of the arc-shaped limiting groove, the actuating member 5 remains stationary. That is to say, only the rider 2 and the driving member 6 rotate until the rider 2 can no longer rotate, and the stroller is completely folded (not shown in the figure).

[0084] The setting that allows the stroller to be folded when the rider 2 is in the rearward position can be implemented using any known and feasible structure.

[0085] When unfolding the folded stroller, rotate the rider 2 forward and upward, thereby driving the driving member 6 to rotate together. The driving member 6 of the driving member 6 rotates within the first stroke groove 53. When the rider 2 rotates to the rearward position, the driving member 6 abuts against the rear end wall of the first stroke groove 53. During this process, the acting member 5 still does not rotate.

[0086] The first connecting member and the second connecting member can be set as steel wires or similar structures.

[0087] In the above setting, the stroller of the present invention is set such that when the rider is in the rearward position, the driving part abuts against the rear end wall of the first stroke groove; when the rider is in the rearward position, under the action of the torsion spring, the part of the acting member located within the arc-shaped limiting groove abuts against the groove wall on one side of the arc-shaped limiting groove; when the rider 2 is in the rearward position, the stroller can be folded, and during folding, the rider 2 rotates backward and downward, and also during this folding process, the acting member does not rotate; in other embodiments, it can be reversed, that is, set such that when the rider is in the forward position, the driving part abuts against the front end wall of the first stroke groove; when the rider is in the forward position, under the action of the torsion spring, the part of the acting member located within the arc-shaped limiting groove abuts against the groove wall on one side of the arc-shaped limiting groove; when the rider 2 is in the forward position, the stroller can be folded, and during folding, the rider 2 rotates forward and downward, and also during this folding process, the acting member does not rotate. Appropriate modifications can be made to other related structures, and these are two technically equivalent solutions.

[0088] The specific structures of the front wheel orientation mechanism and the rear wheel orientation mechanism can also be other known and feasible structures, as long as in the above various states, when the first connecting member and the second connecting member can be pulled upward to be unlocked, or after the first connecting member and the second connecting member are released, they can be in the locked state under the action of the front elastic member / rear elastic member, that is, as long as the foregoing functions are satisfied.

[0089] The stroller further includes a linkage device disposed between the front feet 16, the rear feet 17, and the rider 2. The linkage device is configured such that when the rider 2 rotates backward and downward from the rearward position, the front feet 16 and the rear feet 17 can be driven to rotate relatively closer through the linkage folding device; when the folded stroller is rotated upward, the front feet 16 and the rear feet 17 can be driven to rotate relatively and unfold through the linkage folding device. That is, when the rider 2 folds and unfolds, the front feet 16 and the rear feet 17 can be folded and unfolded through the linkage folding device.

[0090] The linkage folding device can be any known and feasible structure, which is not the inventive point of the present invention, so it will not be elaborated here.

[0091] In this embodiment, 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. Referring to 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 in the first tooth groove 21 and the second tooth groove 15, and a return spring 72 disposed 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.

[0092] A driven member 73 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 relative to the rider 2 is provided on the rider 2. The lower end of an unlocking wire is connected to the driven member 73, and the upper end is connected to the operating member 24. A fitting member 211 is further protruded on the bottom wall 21 of the first tooth groove. One side of the fitting member 211 is provided as an inclined surface 212; correspondingly, a fitting groove 731 is recessed on the side of the driven member 73 facing the bottom wall of the first tooth groove, and the bottom wall of the fitting groove 731 is also provided as an inclined surface 732. Under the action of the return spring 72, the fitting member 211 extends into the fitting groove 731, and the inclined surface 212 of the fitting member 211 cooperates with the inclined surface 732 of the fitting groove 731. When the rider locking mechanism needs to be unlocked, the operating member 24 is driven to pull the unlocking wire upward, thereby pulling the driven member 73 to rotate. Under the cooperation of the inclined surface 212 of the fitting member 211 and the inclined surface 732 of the fitting groove 731, the driven member 73 moves in the direction of the gear 71 while rotating, and further pushes 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.

[0093] The specific structure of the operating member 23, its connection with the rider 2, and its connection with the unlocking wire can all be any known and feasible technologies, which are not the inventive points of the present invention, so they will not be elaborated here. In other embodiments, the specific structure and unlocking method of the rider locking mechanism can be any other 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, because it is not the inventive point of the present invention, so it will not be elaborated.

[0094] In this embodiment, the baby stroller further includes a connecting pipe 27 whose lower side is connected to the lower bracket 1. The connecting pipe 27 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).

[0095] The lower side of the connecting pipe 27 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 27. The connecting member 25 passes through the rider 2, passes through the mating square hole and hole 65, and then passes through 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, so as to connect the rider, the lower bracket, the acting member, the driving member and the connecting pipe. That is, the rider, the lower bracket 1, the acting member, the driving member and the connecting pipe 27 are pivotally connected coaxially. In this way, it is equivalent to that the connecting pipe 27 is connected outside the receiving cavity 15 of the lower bracket 1, so as to cover the driving member 6 and the acting member 5 and not expose them outside.

[0096] The connecting pipe 27 is arranged in cooperation with the rider 2, and the connecting pipe 27 is arranged such that when the baby stroller is folded, when the rider 2 rotates backward from the rearward position, it can drive the connecting pipe 27 to also rotate backward and downward for folding. When the rider rotates from the rearward position to the forward position, the connecting pipe 27 is not linked, that is, the connecting pipe 27 remains in place. This function can be achieved by any known and feasible structure, and since it is not the inventive point of the present invention, it will not be elaborated here.

[0097] The connection mode between the connecting pipe 27 and the lower bracket 1, its connection mode with the seat fabric, and the cooperation mode with the rider 2 can be any known and feasible structure, and since it is not the inventive point of the present invention, it will not be elaborated here.

[0098] In other embodiments, the connecting pipe 27 may not be provided, but instead a shielding cover (not shown in the figure) may be directly provided. The shielding cover is placed on the side of the driving member away from the rider, and a connecting hole is provided thereon. The connecting member 25 passes through the rider 2, passes through the mating square hole and hole 65, and then passes through the connecting hole on the shielding cover, and then is locked into the connecting member 25 from the other side of the connecting hole by a screw 26, so as to connect the rider, the lower bracket, the acting member, the driving member and the connecting pipe. In this way, it is equivalent to that the shielding cover is connected outside the receiving cavity 15 of the lower bracket 1, so as to cover the driving member and the acting member and not expose them outside. Correspondingly, in this setting, when the rider 2 is in the rearward position, the rider locking mechanism can be directly unlocked to make the rider 2 rotate backward and downward to fold the baby stroller.

[0099] The baby stroller of the present invention further includes an armrest 8, and the rear side of the armrest 8 is connected to the upper side of the lower bracket 1. And the armrest 8 can be arranged to be detachably connected, relatively rotatably connected or fixedly connected to the lower bracket 1. Since it is not the inventive point of the present invention, it will not be elaborated here.

[0100] Those skilled in the art should understand that the orientation or positional relationship indicated by the above terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. In the above description, the position where the front wheel 32 is located is the front, the position where the rear wheel 42 is located is the rear, the position where the rider 2 is located is the upper, and the positions where the front wheel 32 and the rear wheel 42 are located are the lower. 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 vision 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 child stroller that can be converted between an unfolded state and a folded state. The child stroller includes a lower bracket and a rider pivotally connected to the lower bracket at the lower side, and the rider is configured to be rotatable and reversed between a rearward position and a forward position; characterized in that: The child stroller further includes a front wheel set and a rear wheel set that are respectively rotatably connected to the front lower side and the rear lower side of the lower bracket relative to the horizontal, and 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 and the front wheel set and the rear wheel set respectively; The child stroller further includes an acting member rotatably connected to the lower bracket, a torsion spring connected between the acting member and the lower bracket, a first connecting member and a second connecting member connected to the upper side of the acting member. The lower side of the first connecting member is connected to the front wheel orientation mechanism, and the lower side of the second connecting member is connected to the rear wheel orientation mechanism; A driving member is connected to the lower side of the rider. The driving member is cooperatively arranged with the acting member. And under the cooperation of the rider, the driving member, the torsion spring and the acting member, when the rider rotates and reverses between the forward position and the rearward position, the acting member also rotates, and the rotation of the acting member will drive the first connecting member and the second connecting member; when the rider rotates from the rearward position to the forward position, the second connecting member is in a state of being pulled upward by the acting member, and the acting member releases the upward pull on the first connecting member, so that the front wheel orientation mechanism can be in a locked state and the rear wheel orientation mechanism is in an unlocked state; When the rider rotates from the forward position to the rearward position, the first connecting member is in a state of being pulled upward by the acting member, and the acting member releases the upward pull on the second connecting member, so that the rear wheel orientation mechanism can be in a locked state and the front wheel orientation mechanism is in an unlocked state.

2. The stroller for children according to claim 1, characterized in that: The acting member, the first connecting member and the second connecting member are further arranged such that when the child stroller is in the unfolded state and the rider rotates to an intermediate position between the forward position and the rearward position, both the first connecting member and the second connecting member are in a state of being pulled upward by the acting member, so that both the front wheel orientation mechanism and the rear wheel orientation mechanism are in an unlocked state, and the front wheel set and the rear wheel set can both rotate horizontally.

3. The stroller for children according to claim 1 or 2, characterized in that: The cooperation of the rider, the driving member, the torsion spring and the acting member is further arranged such that when the child stroller is folded and the rider rotates downward, the acting member does not rotate, so that the first connecting member and the second connecting member remain in the state before the child stroller is folded, and the front wheel orientation mechanism and the rear wheel orientation mechanism also remain in the state before the child stroller is folded.

4. The stroller for children according to any one of claims 1 to 3, characterized in that: The driving member is arranged to be rotatable in the same direction as the rider; preferably, a first stroke groove is provided on the acting member, and a driving portion is provided on the driving member, and the driving portion is rotatably inserted into the first stroke groove.

5. The stroller for children according to claim 4, characterized in that: The cooperation between the driving portion and the first stroke groove is configured such that when the rider is in one of the forward position and the rearward position, the driving portion abuts against the side end wall corresponding to the first stroke groove, and when the rider rotates to the other direction, the driving portion can drive the actuating member to rotate by pushing the side end wall corresponding to the first stroke groove, and the torsion spring is twisted due to the rotation of the actuating member; preferably, when the rider rotates from the other direction position to one of the direction positions, the driving portion disengages from the push on the side end wall corresponding to the first stroke groove, and under the action of the torsion force of the torsion spring, the actuating member rotates in the opposite direction; preferably, when the stroller is folded and the rider rotates downward, the driving portion rotates and moves in the first stroke groove, and disengages from the push on any side end wall of the first stroke groove.

6. The stroller for children according to claim 5, wherein: When the rider is in the rearward position, the driving portion abuts against the rear end wall of the first stroke groove, and when the rider rotates to the forward position, the driving portion drives the actuator to rotate by pushing the rear end wall; preferably, the stroller is configured so that when the rider is in the rearward position, the stroller can be folded and the rider rotates rearward and downward.

7. The stroller for children according to any one of claims 1 to 6, characterized in that: One side of the upper bracket is concavely provided with an arc-shaped limiting groove which is not connected end to end, and the action member is at least partially rotatably placed in the arc-shaped limiting groove; preferably, when the rider is in one of the forward position and the rearward position, under the action of the torsion spring, the part of the action member located in the arc-shaped limiting groove abuts against the groove wall on one side of the arc-shaped limiting groove; preferably, when the rider rotates to the other direction position, the action member rotates until the part of the action member located in the arc-shaped limiting groove abuts against the groove wall on the other side of the arc-shaped limiting groove; preferably, when the rider is in the rearward position, under the action of the torsion spring, the part of the action member located in the arc-shaped limiting groove abuts against the groove wall on one side of the arc-shaped limiting groove; When the rider rotates to the forward position, the portion of the action member located in the arc-shaped limiting groove abuts against the groove wall on the other side of the arc-shaped limiting groove.

8. The stroller for children according to claim 7, characterized in that: The acting member includes a main body and an acting part arranged on one side of the main body, the acting part can be relatively rotatably placed in the arc-shaped limit groove, and the first travel groove is arranged on the side of the main body away from the acting part; preferably, the first connecting member and the second connecting member are both connected to the acting part, and correspondingly, the upper bracket is recessed with a first channel and a second channel connected to the arc-shaped limit groove on the side where the arc-shaped limit groove is arranged, and the first channel and the second channel are respectively used for routing the first connecting member and the second connecting member.

9. The stroller according to claim 7 or 8, characterized in that: The upper bracket is also recessed with a receiving groove, the torsion spring is placed in the receiving groove, and one end of the torsion spring is connected to the side wall or bottom wall of the receiving groove, and the other end is connected to the acting member; preferably, the arc-shaped limiting groove is recessed on the outer edge of the receiving groove facing one end of the acting member, and the arc-shaped groove is connected to the receiving groove; preferably, the receiving groove and the arc-shaped limiting groove are coaxially arranged.

10. The stroller for children according to any one of claims 4 to 9, characterized in that: The driving member includes a main body and the driving portion protruding from the main body toward the side of the working member, and the main body is located on the side of the working member away from the upper bracket; preferably, the rider and the working member are respectively pivotally connected to the two sides of the upper bracket away from each other, and the upper bracket is provided with a through hole penetrating the bottom wall of the accommodating groove on the left and right sides, and the working member is also provided with a connecting hole penetrating on the left and right sides, and the through hole and the connecting hole are coaxially arranged.

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, and the rear side of the front foot is pivotally connected to the front side of the rear foot; the front wheel group is connected to the front lower side of the front foot in a relatively horizontally rotatable manner, and the front wheel orientation device is arranged between the lower side of the front foot and the front wheel group; the rear wheel group is connected to the front lower side of the rear foot in a relatively horizontally rotatable manner, and the rear wheel orientation device is arranged between the lower side of the rear foot and the rear wheel group; preferably, the lower side of the rider is pivotally connected to the front foot and / or the rear foot, and correspondingly, the action member is connected to the upper side of the front foot and / or the rear foot in a relatively rotatable manner.

12. The stroller for children according to claim 11, characterized in that: The rear-wheel orientation mechanism comprises a rear-wheel orientation piece which is relatively movably connected to the lower side of the rear foot, a second matching part which is arranged on the rear wheel assembly and can match with the rear-wheel orientation piece, and a rear elastic piece is arranged between the rear-wheel orientation piece and the rear foot, and the lower side of the second connecting piece is connected to the rear-wheel orientation piece; preferably, when the action piece releases the upward pulling of the second connecting piece, under the action of the rear elastic piece, when the rear-wheel orientation piece moves relative to the rear lower side of the lower bracket and matches with the second matching part, the rear-wheel orientation mechanism is in a locked state; preferably, the rear-wheel orientation piece is arranged to be relatively movably connected to the lower side of the rear foot, and the second matching part is arranged as a second directional hole which opens upward, and when the rear-wheel orientation piece moves downward and the lower side extends into the second directional hole, the rear-wheel orientation mechanism is in a locked state; preferably The front wheel orientation mechanism includes a front wheel orientation piece which is relatively movably connected to the lower side of the front foot, a first matching portion which is arranged on the front wheel assembly and can match with the front wheel orientation piece, and a front elastic piece is arranged between the front wheel orientation piece and the front lower side of the lower bracket, and the lower side of the first connecting piece is connected to the front wheel orientation piece; preferably, when the action piece releases the upward pull on the first connecting piece, under the action of the front elastic piece, when the front wheel orientation piece moves relative to the front lower side of the lower bracket and matches with the first matching portion, the front wheel orientation mechanism is in a locked state; preferably, the front wheel orientation piece is arranged to be relatively movably connected to the lower side of the front foot, and the first matching portion is arranged as an orientation hole one which opens upward, and when the front wheel orientation piece moves downward and the lower side extends into the orientation hole one, the front wheel orientation mechanism is in a locked state.

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