Stroller

Abstract

The stroller comprises rear feet, a handlebar and front feet, the rear sides of the front feet are pivoted to the rear feet, the lower sides of the handlebar are pivoted to the rear feet or / and the front feet, and the lower sides of the front feet and the lower sides of the rear feet are connected with a front wheel set and a rear wheel set respectively, a front wheel orientation mechanism and a rear wheel orientation mechanism capable of limiting relative horizontal rotation of the front foot and the front wheel group and the rear foot and the rear wheel group are respectively arranged between the front foot and the front wheel group and between the rear foot and the rear wheel group; the lower side of the handlebar is connected with an acting piece capable of rotating together with the handlebar, and a front wheel linkage device and a rear wheel linkage device are arranged between the front wheel orientation mechanism and the acting piece and between the rear wheel orientation mechanism and the acting piece respectively. The acting piece comprises a cam-shaped body, and one side of the front wheel linkage device and one side of the rear wheel linkage device make contact with the outer surface of the body. In the rotating reversing process of the handlebar, the contact positions of the front wheel linkage device and the rear wheel linkage device and the outer surface of the cam-shaped body are changed in a rotating mode, so that the unlocking state or the locking state of the front wheel orientation mechanism and the rear wheel orientation mechanism is changed in a linkage mode, and operation is very easy and convenient.

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 hardship of the parents holding the baby. Therefore, baby strollers are widely used in families with children.

[0003] In order to make it more convenient to take care of the baby, the handlebars of some baby strollers are set to be rotatable back and forth between the forward position and the backward position. When the handlebars rotate from the forward position, the baby in the stroller faces the parents; when the handlebars rotate to the backward position, the baby in the stroller faces forward just like the parents. With such a setting, it is more convenient for the parents to take care of the baby.

[0004] However, for traditional baby strollers, although some have both the front and rear wheels set to be horizontally rotatable, a vertically movable orienting member is provided on the wheel seat. Then, to make the front and rear wheels oriented and not horizontally rotatable or to release the orientation, it is necessary to vertically move the orienting member up and down before or after the handlebars are reversed so that it engages with or disengages from the corresponding orienting grooves on the front and rear feet. Such a setting makes the operations of orienting and unlocking the front and rear wheels rather troublesome.

[0005] There are also some baby strollers where only the front wheels are set to be horizontally rotatable when the handlebars are in the backward position, and the rear wheels cannot be horizontally rotated. Thus, after the handlebars are reversed to the forward position, the front wheels (the original rear wheels) in the forward direction of the baby stroller cannot be horizontally rotated. In this way, when moving forward, 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. Moreover, to adjust the orientation of the front wheel set (the original front wheels) on the front side of the baby stroller when moving forward, it is still necessary to vertically move the orienting member up and down before or after the handlebars are reversed so that it engages with or disengages from the corresponding orienting grooves on the front feet, so the operation is also not simple. Summary of the Invention

[0006] The object of the present invention is to overcome the above-mentioned drawbacks and provide a baby stroller in which both the front and rear wheels are set to be horizontally rotatable, and when the handlebars are reversed, relevant components can be automatically linked to change the state of whether the front wheel set and the rear wheel set can be horizontally rotated.

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

[0008] A stroller for children, which can be switched between an unfolded state and a folded state, comprises a rear foot, a rider and a front foot, wherein the rear side of the front foot and the lower side of the rider are pivotally connected to the rear foot, and the rider is arranged to be rotatable between a rearward position and a forward position, and the lower sides of the front foot and the rear foot are respectively connected to a front wheel group and a rear wheel group that can rotate horizontally; 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 front foot and the front wheel group and between the rear foot and the rear wheel group; a rear wheel orientation mechanism that can rotate together with the rear wheel group is connected to the lower side of the rider A front wheel linkage device and a rear wheel linkage device are respectively arranged between the front wheel orientation mechanism, the rear wheel orientation mechanism and the orientation mechanism and the orientation member; the orientation member comprises a body, and the body is arranged in a cam shape, and the front wheel linkage device and the rear wheel linkage device are in contact with the outer surface of the cam-shaped body on one side facing the orientation member; during the rotation and reversing process of the rider, the contact positions of the front wheel linkage device and the rear wheel linkage device with the outer surface of the cam-shaped body change in rotation, thereby changing the unlocking state or locking state of the front wheel orientation mechanism and the rear wheel orientation mechanism in linkage.

[0009] When the rider rotates to the rearward position, the rear wheel orientation mechanism is linked to the locked state through the rear wheel linkage device, and the front wheel orientation mechanism is linked to the unlocked state through the front wheel linkage device; when the rider rotates to the forward position, the rear wheel orientation mechanism is linked to the unlocked state through the rear wheel linkage device, and the front wheel orientation mechanism is linked to the locked state through the front wheel linkage device.

[0010] The radius of the base circle of the cam-shaped body is smaller than the straight-line distance between the center of the base circle and the outer surface of the non-base circle part. When the rider is in a rearward position, one side of the front wheel linkage device contacts the outer surface of the base circle of the cam-shaped body, and the rear wheel linkage device contacts the outer surface of the non-base circle of the cam-shaped body; when the rider rotates to a forward position, the rear wheel linkage device contacts the outer surface of the base circle of the cam-shaped body, and the front wheel linkage device contacts the outer surface of the non-base circle of the cam-shaped body.

[0011] The cooperation between the cam-shaped body and the front wheel linkage device, the rear wheel linkage device, the front wheel orientation mechanism and the rear wheel orientation mechanism is configured so that when the rider rotates relative to the front foot and the rear foot during the folding process of the stroller, the rear wheel orientation mechanism remains in a locked state and the front wheel orientation mechanism remains in an unlocked state.

[0012] The rear foot is provided with a limiting structure which cooperates with the action member, and the limiting structure is arranged so that when the rider rotates from the rearward position to the forward position, the cooperation between the action member and the limiting structure prevents the rider from rotating forward any further.

[0013] The rear foot is provided with a receiving cavity, the main body of the action member is placed in the receiving cavity, and the front wheel guide member and the rear wheel guide member extend into the receiving cavity toward one side of the action member and contact the outer surface of the cam-shaped main body.

[0014] The accommodating chamber is arranged on the side of the rear foot away from the rider, and a through hole is arranged on the bottom wall of the accommodating chamber to communicate with the rider, and the lower side of the rider is connected with the action member through the through hole.

[0015] A second locking mechanism for limiting relative rotation between the lower side of the rider and the opposite side of the rear foot is provided.

[0016] Because the present invention adopts the above technical solution, it has the following beneficial effects:

[0017] 1. During the rotation and reversing process, the driver can automatically link related components to change the state of whether the front and rear wheels can rotate horizontally, without additional operation, so the operation is very simple;

[0018] 2. Regardless of whether the rider is in the forward or rearward position, when the parents push the stroller forward through the rider, the front wheels in the forward direction of the stroller can rotate horizontally, while the rear wheels cannot rotate horizontally. Therefore, when the stroller is moving forward, if there is a slight obstruction on the road, the front wheels can rotate horizontally to avoid it, while the rear wheels maintain the original direction of travel, making the stroller move more smoothly and safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a plan view of the child stroller of the present invention in an unfolded state when the rider is in a rearward position;

[0020] Figure 2 It is a three-dimensional schematic diagram of the child stroller of the present invention in an unfolded state when the rider is in a rearward position;

[0021] Figure 3 It is a plan view of the child stroller of the present invention in an unfolded state when the rider is in a forward position;

[0022] Figure 4 It is an exploded and enlarged schematic diagram of some active components of the child stroller of the present invention when the rider is in the rearward position;

[0023] Figure 5 It is an enlarged schematic diagram of the rear wheel assembly and the rear wheel directional member of the child stroller of the present invention;

[0024] Figure 6 Based on Figure 2 A schematic diagram of the cross section enlarged along the BB direction;

[0025] Figure 7 For the rearward position of the driver, Figure 4Schematic enlarged plan view of part D;

[0026] Figure 8 Another enlarged view at an angle of the actuating member, front wheel actuating member, and rear wheel actuating member when the rider is in the rearward position;

[0027] Figure 9 Another further enlarged view at an angle of the actuating member, front wheel actuating member, and rear wheel actuating member when the rider is in the rearward position;

[0028] Figure 10 For when the rider is in the forward position according to Figure 4 Schematic enlarged plan view of part D;

[0029] Figure 11 Another enlarged view at an angle of the actuating member, front wheel actuating member, and rear wheel actuating member when the rider is in the rearward position;

[0030] Figure 12 For the schematic enlarged plan view of part E according to Figure 4 when the stroller is in the folded state;

[0031] Figure 13 Another enlarged view at an angle of the actuating member, front wheel actuating member, and rear wheel actuating member when the stroller is in the folded state;

[0032] Figure 14 Schematic enlarged view of the actuating member;

[0033] Figure 15 For the schematic enlarged sectional view in the A - A direction according to Figure 2 ;

[0034] Figure 16 For the schematic enlarged exploded view of part B according to Figure 2 ;

[0035] Figure 17 Schematic enlarged view of the second driving member;

[0036] Figure 18 For the schematic enlarged exploded view of another angle of part B according to Figure 2 ;

[0037] Figure 19 Schematic enlarged exploded view of the seat backrest tube, first locking mechanism, first unlocking device, and rider;

[0038] Figure 20 Schematic enlarged exploded view of the first unlocking device and the third driving member;

[0039] Figure 21 For the schematic enlarged exploded view of part D according to Figure 2 ;

[0040] Figure 22 It is a plan view of the child stroller of the present invention in the process of being folded;

[0041] Figure 23 It is a three-dimensional schematic diagram of the child stroller of the present invention in the process of being folded;

[0042] Figure 24 The figure is a plan view of the baby stroller of the present invention in a folded state. DETAILED DESCRIPTION

[0043] like Figures 1 to 15 As shown, the present invention discloses a baby stroller, which can be converted between an unfolded state and a folded state. The baby stroller comprises a rear leg 1, a rider 2, and a front leg 3 pivotally connected to the rear leg 1 at the rear side. The lower side of the rider 2 is pivotally connected to the rear leg 1 or / and the front leg 3, and the rider 2 is arranged to be rotatable and changeable between a rearward position and a forward position; the lower sides of the front leg 3 and the rear leg 1 are respectively connected to a front wheel group and a rear wheel group that can rotate horizontally; a front wheel orientation mechanism and a rear wheel orientation mechanism that can limit the relative horizontal rotation of the corresponding two are respectively arranged between the front leg 3 and the front wheel group and between the rear leg 1 and the rear wheel group, that is, a front wheel orientation mechanism that can limit the relative horizontal rotation of the two is arranged between the front leg 3 and the front wheel group, and the rear leg 1 and the rear wheel group are respectively arranged. A rear wheel orientation mechanism is arranged between the front wheel orientation mechanism and the rear wheel orientation mechanism to limit the relative horizontal rotation of the two; an action member 8 is connected to the lower side of the rider 2 and can rotate with the front wheel orientation mechanism; a front wheel linkage device and a rear wheel linkage device are arranged between the front wheel orientation mechanism, the rear wheel orientation mechanism and the action member 8 respectively; the action member 8 includes a body 81, and the body 81 is arranged in a cam shape, and the front wheel linkage device and the rear wheel linkage device are in contact with the outer surface of the cam-shaped body 81 on one side facing the action member 8. During the rotation and reversing process of the rider 2, the contact position of the front wheel linkage device and the rear wheel linkage device with the outer surface of the cam-shaped body 81 changes in rotation, thereby changing the unlocking state or locking state of the front wheel orientation mechanism and the rear wheel orientation mechanism in linkage. That is, if the front wheel orientation mechanism and the rear wheel orientation mechanism are in a locked state before the rider changes direction, they will be changed to an unlocked state, and if they are in an unlocked state before the rider changes direction, they will be changed to a locked state, thereby changing the state of whether the front wheel group and the rear wheel group can rotate horizontally.

[0044] Preferably, when the rider 2 rotates to the backward position, the rear wheel linkage drives the rear wheel orientation mechanism to switch to the locked state, and the front wheel linkage drives the front wheel orientation mechanism to switch to the unlocked state, so that the rear wheel set cannot rotate horizontally relative to the rear foot 1, and the front wheel set can rotate horizontally relative to the front foot 3; when the rider 2 rotates to the forward position, the rear wheel linkage drives the rear wheel orientation mechanism to be in the unlocked state, and the front wheel linkage drives the front wheel orientation mechanism to be in the locked state, so that the rear wheel set can rotate horizontally relative to the rear foot 1, and the front wheel set cannot rotate horizontally relative to the front foot 3.

[0045] The front wheel linkage includes a front wheel actuator 34 that can move relative to the front foot 3 or / and the rear foot 1, a fifth elastic member 35 disposed between the front wheel actuator 34 and the front foot 3 and capable of driving the front wheel actuator 34 to move toward the actuator 8, and a fourth connecting member 36 having an upper side connected to the front wheel actuator 34. The lower side of the fourth connecting member 36 is connected to the front wheel orientation mechanism, and the front wheel actuator 34 contacts the outer surface of the cam-shaped body 81.

[0046] The rear wheel linkage includes a rear wheel actuator 16 that can move up and down relative to the front foot 3 or / and the rear foot 1, a seventh elastic member 17 disposed between the rear wheel actuator 16 and the rear foot 1 and capable of driving the rear wheel actuator 16 to move toward the actuator 8, and a fifth connecting member 18 having an upper side connected to the rear wheel actuator 16. The lower side of the fifth connecting member 18 is connected to the rear wheel orientation mechanism; the rear wheel actuator 16 contacts the outer surface of the cam-shaped body 81.

[0047] Under the action of the fifth elastic member 35 and the seventh elastic member 17, the front wheel actuator 34 and the rear wheel actuator 16 always maintain a state of contacting the outer surface of the cam-shaped body 81. Thus, when the rider 2 rotates between the forward position and the backward position to drive the cam-shaped body 81 to rotate, the contact positions of the outer surface of the cam-shaped body 81 with the front wheel actuator 34 and the rear wheel actuator 16 change, and the front wheel actuator 34 and the rear wheel actuator 16 move.

[0048] In this embodiment, the radius of the base circle of the cam-shaped body 81 is smaller than the straight-line distance between the center of the base circle and the outer surface of the non-base circle part. As Figures 7 to 9As shown, when the rider 2 is in the backward position, one side of the front-wheel linkage device (specifically, the front-wheel driving member 34) contacts the outer surface of the base circle of the cam-shaped body 81 of the acting member, the rear-wheel linkage device (specifically, the rear-wheel driving member 16) contacts the outer surface of the non-base circle of the cam body 81, and the seventh elastic member 17 is in a compressed state. When the rider rotates to the forward position, the rear-wheel linkage device (the rear-wheel driving member 16) contacts the outer surface of the base circle of the cam-shaped body, and the front-wheel linkage device (i.e., the front-wheel driving member 34) contacts the outer surface of the non-base circle of the cam-shaped body, and the fifth elastic member is in a compressed state.

[0049] When the contact position of the front-wheel driving member 34 or the rear-wheel driving member 16 with the outer surface of the body 81 rotates from the outer surface of the non-base circle to the outer surface of the base circle, the front-wheel driving member or the rear-wheel driving member moves in the direction of the acting member 8, thereby pulling the corresponding fourth connecting member or fifth connecting member to link and unlock the corresponding front-wheel orientation mechanism or rear-wheel orientation mechanism; when the contact position of the front-wheel driving member 34 or the rear-wheel driving member 16 with the outer surface of the body 81 rotates from the outer surface of the base circle to the outer surface of the non-base circle, the front-wheel driving member 34 or the rear-wheel driving member 81 moves in the direction away from the acting member 8, thereby releasing the pull on the corresponding fourth connecting member or fifth connecting member, and the corresponding front-wheel orientation mechanism or rear-wheel orientation mechanism can be in a locked state.

[0050] In this embodiment, the front-wheel orientation mechanism includes a front-wheel orientation member 33 that is connected to the lower side of the front foot 3 so as to be movable up and down relatively, a first engaging portion provided on the front-wheel group and capable of cooperating with the front-wheel orientation member 33, and a sixth elastic member 37 provided between the front-wheel orientation member 33 and the front foot 3 and capable of driving the front-wheel orientation member 33 to move downward; the lower side of the fourth connecting member is connected to the front-wheel orientation member 33; when the front-wheel driving member 34 releases the pull on the fourth connecting member 36, under the action of the sixth elastic member 37, the front-wheel orientation member 33 moves downward to cooperate with the first engaging portion, so that the front-wheel orientation mechanism is in a locked state and the front-wheel group cannot rotate horizontally relative to the front foot 3; when the front-wheel driving member pulls the fourth connecting member, the fourth connecting member pulls the front-wheel orientation member 33 to move upward to disengage from the first engaging portion, and the front-wheel orientation mechanism is unlocked, and the front-wheel group can rotate horizontally relative to the front foot 3.

[0051] The front-wheel group includes a front-wheel seat 31 that is connected to the front foot 3 so as to be rotatable horizontally relatively and a front wheel 32 that is connected to the front-wheel seat 31; the first engaging portion is an upward-opening orientation hole 311 provided on the front-wheel seat 31 (such as Figure 4As shown, the orientation hole 311 is the first mating part. When the lower side of the front-wheel orientation member 33 extends into the first orientation hole 311, the front-wheel orientation mechanism is in a locked state, and the front-wheel seat 31 cannot rotate horizontally relative to the front foot 3. When the front-wheel orientation member 33 moves upward and disengages from the first orientation hole 311, the front-wheel orientation mechanism is unlocked, and the front-wheel seat 31 can rotate horizontally relative to the front foot 3.

[0052] The rear-wheel orientation mechanism includes a rear-wheel orientation member 15 that is connected to the lower side of the rear foot 1 so as to be movable up and down relative thereto, a second mating part provided on the rear-wheel group and capable of cooperating with the rear-wheel orientation member 15, and an eighth elastic member 19 provided between the rear-wheel orientation member 15 and the rear foot and capable of driving the rear-wheel orientation member 15 to move downward. The lower side of the seventh connecting member is connected to the rear-wheel orientation member 15. When the rear-wheel driving member releases the pulling force on the fifth connecting member, under the action of the eighth elastic member, when the rear-wheel orientation member 15 moves downward and cooperates with the second mating part, the rear-wheel orientation mechanism is in a locked state, and the rear-wheel group cannot rotate horizontally relative to the front foot 3. When the rear-wheel driving member pulls the seventh connecting member, and the seventh connecting member pulls the rear-wheel orientation member 15 to move upward and disengage from the second mating part, the rear-wheel orientation mechanism is unlocked, and the rear-wheel group can rotate horizontally relative to the rear foot 1.

[0053] The rear-wheel group includes a rear-wheel seat 13 that is connected to the rear foot 1 so as to be rotatable horizontally relative thereto, and a rear wheel 14 connected to the rear-wheel seat 13. The second mating part is an upwardly opening orientation hole two 131 provided on the rear-wheel seat 13, and the orientation hole two 131 is provided as the second mating part. When the lower side of the rear-wheel orientation member 15 extends into the orientation hole two 131, the rear-wheel orientation mechanism is in a locked state, and the rear-wheel seat 13 cannot rotate horizontally relative to the rear foot 1 (as shown in Figure 4 、 5 、6), when the rear-wheel orientation member 15 moves upward and disengages from the orientation hole two 131, the rear-wheel orientation mechanism is unlocked, and the rear-wheel seat 13 can rotate horizontally relative to the rear foot 1.

[0054] A downwardly opening accommodation hole 100 is provided on the lower side of the rear foot 1. The upper side of the rear-wheel orientation member 15 is disposed in the accommodation hole 100 so as to be movable up and down relative thereto, and the eighth elastic member 19 is disposed between the top wall of the accommodation hole 100 and the rear-wheel orientation member 15. Similarly, the front foot 3, the front-wheel orientation member 33, and the sixth elastic member 37 can also adopt this setting.

[0055] In the process of rotating the rider 2 in the rearward position forward, the contact surface between the cam-shaped body 81 and the front wheel guide member 34 rotates from the outer surface of the base circle to the outer surface of the non-base circle part, and the contact surface between the cam-shaped body 81 and the rear wheel guide member 16 rotates from the outer surface of the non-base circle part to the outer surface of the base circle. In this way, the front wheel guide member 34 is driven by the action member 8 to move downward, thereby releasing the pull on the fourth connecting member 36. At this time, under the action of the sixth elastic member 27, when the directional hole 1 311 is aligned with the front wheel directional member 33, the front wheel directional member 33 moves downward, and its lower side moves into the directional hole 1 311 of the front wheel seat 31, so that the front wheel directional mechanism is in a locked state; similarly, as the contact surface between the cam-shaped body 81 and the rear wheel guide member 16 changes from the outer surface of the non-base circle to the outer surface of the base circle part, under the action of the seventh elastic member 17, the rear wheel guide member 16 moves upward relative to the rear foot, so that the rear wheel directional member 15 can be pulled upward from the directional hole 2 131 of the rear wheel seat 13 through the fifth connecting member 18. When the rider 2 rotates to the forward position, as shown in FIG. Figure 10 , 11 As shown, the rear wheel driving member 16 contacts the outer surface of the base circle of the cam-shaped body 81, and the front wheel directional member 33 contacts the outer surface of the non-base circle of the cam-shaped body 81. In this state, the lower side of the rear wheel directional member 15 is completely separated from the directional hole 2 131 of the rear wheel seat 13, the rear wheel directional mechanism is unlocked, and the rear wheel group can rotate horizontally, that is, the rear wheel 14 can rotate horizontally; while the rear side of the front wheel directional member 33 extends into the directional hole 1 311 of the front wheel seat 31, the front wheel directional mechanism is unlocked, and the front wheel group cannot rotate horizontally, that is, the front wheel 32 cannot rotate horizontally.

[0056] When the driver 2 wants to rotate backward from the forward position to the rearward position, the above-mentioned actions are performed in reverse, and the principle is the same.

[0057] 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 14 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 14 can rotate horizontally. 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.

[0058] Further, such asFigure 12 , 13 As shown, the cam-shaped body 81, the front-wheel linkage, and the rear-wheel linkage are arranged such that during the folding process of the stroller of the present invention, when the seat rotates relative to the front legs and the rear legs, the front-wheel orientation mechanism and the rear-wheel orientation mechanism always maintain the state when the seat 2 is in the rearward position, that is, the rear-wheel set always maintains the state of not being horizontally rotatable relative to the rear legs 1, and the front-wheel set seat 31 always maintains the state of being horizontally rotatable relative to the front legs 3. During the folding process of the stroller, the seat rotates backward from the rearward position.

[0059] To achieve the above object, in this embodiment, the body 81 includes a first cam 811 and a second cam 812 coaxially disposed on one side of the first cam 811. The second cam 812 has the same base circle diameter as the first cam 811; and the base circle portions of the first cam 811 and the second cam 812 overlap left and right (as shown at 810 in Figure 14 ), and the non-base circle portions of the first cam 811 and the second cam 812 extending forward from the overlapping base circle portions also overlap left and right (as shown at 8100 in Figure 14 ), the portion of the first cam 811 extending rearward from the overlapping base circle portion is a non-base circle (as shown at 8101 in Figure 14 ), the portion of the second cam 812 extending rearward from the overlapping base circle portion is a base circle, and this base circle portion of the second cam 812 is located on the non-base circle portion of the first cam 811; when the seat 3 is in the rearward position, the front-wheel orientation member 34 only contacts the outer surface of the base circle of the second cam 812, and the rear-wheel orientation member 16 only contacts the outer surface of the non-base circle of the first cam 811 (as shown in Figures 7 to 9 ).

[0060] As shown in Figure 12 , 13As shown, due to the above settings, when the stroller of the present invention is folded, as the rider 2 and the actuator 8 rotate backward from the rearward position, the change in the contact surface between the actuator body 81 and the front wheel actuator 34 is only the rotational change of the specific position on the outer surface of the base circle of the second cam 812. Specifically, it rotates from the outer surface of the overlapping part of the base circle of the first cam 811 and the base circle of the second cam 812 to the outer surface of the base circle of the first cam 811 located on the non-base circle part of the second cam 812. That is, the side of the front wheel actuator 34 facing the actuator 8 also moves to the side of the non-base circle part of the second cam 812. In this way, the front wheel actuator 34 will not move up and down relative to the front or rear feet, so that the front wheel orientation mechanism always remains in the unlocked state, that is, the front wheel always remains in a state where it can rotate relative to the front foot 3. The change in the contact surface between the actuator body 81 and the rear wheel actuator 16 is also only the rotational change of the specific position on the outer surface of the non-base circle part of the first cam 811. Therefore, the rear wheel actuator 16 will not move up and down relative to the front or rear feet, so that the rear wheel orientation mechanism always remains in the locked state, that is, the rear wheel always remains in a state where it cannot rotate horizontally relative to the rear foot 1.

[0061] With the above settings, when the stroller of the present invention is folded, the front wheel 32 can rotate relative to the front foot 3 to an angle that does not interfere with the rear foot 1 and the rear wheel 14, so that the stroller can be made flatter and smaller in volume after being folded.

[0062] A receiving cavity 10 is provided on the rear foot 1, and the body 81 of the actuator 8 is placed in the receiving cavity 10. The sides of the front wheel actuator 34 and the rear wheel actuator 16 facing the actuator 8 extend into the receiving cavity 100 and contact the outer surface of the cam-shaped body 81.

[0063] In this embodiment, a first chute and a second chute (not shown in the figure) with one end communicating with the receiving cavity 10 are provided inside the rear foot 1. The first chute and the second chute are respectively for the front wheel actuator 16 and the rear wheel actuator 34 to be movably placed relative to each other. A cover plate 12 is connected to the rear foot 1, and the cover plate 12 and the rear foot 1 together form the first chute. During installation, first open the cover plate 12, and after assembling the front wheel actuator 16 and the rear wheel actuator 34, then fixedly connect the cover plate 12 to the rear foot 1.

[0064] The front wheel actuator 34 includes a first section 341 and a second section 342 extending from the first section 341 toward the actuator 8. The thickness of the second section 342 is thinner than that of the first section 341, and the second section 342 faces the outer surface of the second cam 812. Preferably, a blocking portion 340 protrudes from the side wall of the second chute. One side of the first section 341 contacts the side wall of the second chute, and the same side of the second section 342 contacts the blocking portion 340. In this way, it can further ensure that the second section 342 only contacts the outer surface of the second cam 812.

[0065] The rear foot 1 is provided with a limiting structure that cooperates with the operating member 8, and the limiting structure is configured so that when the rider 2 rotates forward from the rearward position to the forward position, the cooperation between the operating member 8 and the limiting structure prevents the rider 2 from rotating forward any further. In this way, the operating member 8 can not only drive the front and rear wheels to change their horizontal rotation state, but also can be used to locate the forward position of the rider 2.

[0066] The bottom wall of the accommodating cavity 10 is provided with an arc-shaped limiting groove 101 which is not connected at the head and tail, and the limiting groove 101 is set as the limiting structure; the action member 8 also includes a limiting portion 82 extending from the body 81 to the side of the bottom wall of the accommodating cavity, that is, the limiting portion 82 is arranged on the side of the second cam 812 facing the bottom wall of the accommodating cavity; the limiting portion 82 can be relatively rotatably placed in the arc-shaped limiting groove 101, when the rider 2 is in the forward position, the limiting portion 82 abuts against one end of the limiting groove 101, so that the rider 2 can no longer rotate forward. The limiting groove 101 is not connected at the head and tail, that is, the limiting groove 101 is not arranged in a full circle.

[0067] Because the body 21 is placed in the accommodating cavity 10, and the base circle of the second cam 812 is located on the non-base circle portion of the first cam 811, a portion of the first cam 811 facing the second cam 812 is exposed outside the second cam 812, so that a gap 813 is formed between the portion of the first cam 811 exposed outside the second cam 812 and the bottom wall of the accommodating cavity 10. During the folding process of the child stroller, the side of the front wheel guide member 34 facing the action member 8 (i.e., the side of the second section 342 facing the action member 8) extends into the gap 813 and contacts the outer surface of the base circle of the second cam 812.

[0068] The accommodating chamber 10 is arranged on the side of the rear foot 1 away from the rider 2, and a through hole is arranged on the bottom wall of the accommodating chamber 10 to communicate with the rider 2. The through hole is arranged coaxially with the base circle of the cam-shaped body 81, and the lower side of the rider 2 is connected to the action member 8 through the through hole. The limiting groove 101 is arranged around the outside of the through hole, so that when the rider 2 rotates, the limiting part can always rotate in the limiting groove 101.

[0069] The outer surface of the stopper 82 is configured not to extend beyond the outer surface of the base circle of the second cam 812. In this configuration, the stopper 82 and the cam-shaped body 81 do not interfere with each other, so that the front and rear rotation orientation of the rider 2 and the rotation locking and unlocking of the front wheel seat 31 and the rear wheel seat 13 do not interfere with each other; and the assembly of the action member 8 and the accommodating chamber 10 is more convenient. In this embodiment, preferably, the outer surface of the stopper 82 and the outer surface of the base circle of the second cam 812 are on the same outer diameter.

[0070] On one side of the rider facing the acting member 8, there is a first assembling portion 222. The acting member 8 further has a mating platform 83 on the side of the body facing the rider. Among the first assembling portion 222 and the mating platform 8, a mating square hole is recessed on one side of one of them facing the other, and the other is square and extends into the mating square hole. In this embodiment, on one side of the rider facing the acting member 8, there is a first assembling portion 222, and a mating square hole 223 is recessed on the side of the first assembling portion 222 facing the acting member 8; correspondingly, the acting member 8 further has a square mating platform 83 on the side of the body 81 facing the rider 2, and the square mating platform 83 extends into the mating square hole 223. Thus, when the rider 2 rotates, the limiting member can rotate synchronously with the rider 2.

[0071] Preferably, a limiting groove 224 is provided on the inner wall of the mating square hole 223, and a corresponding limiting protrusion 831 protrudes from the outer wall of the square mating platform 83, and the limiting protrusion 831 extends into the limiting groove 224. With such a setting, not only can the rider 2 drive the rotation of the acting member 8 more synchronously when rotating, but also it is convenient for the assembly and positioning of the rider 2 and the acting member 8.

[0072] Furthermore, the acting member 8 further includes a main body 84 extending from the second cam 812 towards the side of the rider 2. The main body 84 is coaxially arranged with the base circle of the body 81. The limiting portion 82 protrudes from the outer circle of the main body 84, and the main body 84 passes through the through hole; the square mating platform 83 extends from the main body 84 towards the rider. In this embodiment, the diameter of the main body 84 is adapted to the diameter of the through hole, so that the relative rotation of the acting member 8 and the rider 2 with respect to the rear foot 1 can be smoother.

[0073] Combined Figure 16 、 17 As shown, between the lower side of the rider 2 and the opposite side of the rear foot 1, there is a second locking mechanism for restricting their relative rotation. In this embodiment, the second locking mechanism includes a first tooth groove 22, a second tooth groove 12 respectively provided on the opposite sides of the rider 2 and the rear foot 1, a gear 71 movably arranged left and right in the first tooth groove 22 and the second tooth groove 12, and a second elastic member arranged between the bottom wall of the second tooth groove 12 and the gear 71; under the action of the second elastic member, the gear 71 meshes with the first tooth groove 22 and the second tooth groove 12 at the same time, and the second locking mechanism is in a locked state, and the rider 2 cannot rotate relative to the rear foot 1.

[0074] The second tooth groove 12 is provided on the side of the rear foot facing away from the accommodating cavity, and the base circle of the through hole is coaxially arranged with the second tooth groove 12. Since the accommodating cavity 10 and the second tooth groove 12 are respectively arranged on different sides of the rear foot 1, the interference of the second locking mechanism on the cooperation of the acting member, the front wheel driving member 34, and the rear wheel driving member 16 can be avoided.

[0075] The first assembling part 222 extends from the bottom wall of the first tooth groove 22 towards the side facing the acting part. In this embodiment, a hollow assembling part 121 coaxial with the through hole protrudes from the bottom wall of the second tooth groove 12 of the rear leg 1 towards the direction of the rider 2, and the through hole 11 and the hollow assembling part 121 together form an installation space 122; the side of the first assembling part 222 facing the acting part 8 extends into the installation space 122 and is connected to the square fitting platform 83. Such a setting makes the assembly of the rider 1 and the acting part 8 more stable and can completely avoid interference with the gear 71. The main body 84 and the square fitting platform 83 extend into the installation space 122, and the side of the first assembling part 222 facing the acting part 8 also extends into the installation space 122 and is connected to the square fitting platform 83

[0076] The acting part 8 is also provided with a connecting hole 80 coaxial with the base circle and penetrating through; during assembly, the square fitting platform 83 extends into the fitting square hole 223 of the first assembling part 222, and a connecting shaft 120 passes through the rider 2 and the acting part 8, so that the rider 2, the rear leg 1 and the acting part 8 are connected, and the rider 2 and the acting part 8 can rotate synchronously relative to the rear leg together.

[0077] Combined Figures 18 to 20 As shown, a second unlocking device for unlocking the second locking mechanism is provided between the rider 2 and the second locking mechanism. The second unlocking device includes a second driving part 73 rotatably and relatively movably left and right between the bottom wall of the first tooth groove 22 and the gear 71; a mating active part and driven part are respectively arranged on the opposite sides of the bottom wall of the first tooth groove 22 and the second driving part 73. When the second driving part 73 rotates, through the cooperation of the active part and the driven part, the second driving part 73 moves towards the gear 71 while rotating.

[0078] In this embodiment, the active part and the driven part are respectively a boss 221 and a groove 731 arranged on the opposite sides of the bottom wall of the first tooth groove 22 and the second driving part 73, and a mating active inclined surface 2211 and a driven inclined surface 7311 are respectively arranged on the boss 221 and in the groove 731.

[0079] The gear 71 is movably around the periphery of the hollow assembling part 121 left and right, the second driving part 73 is wound around the periphery of the first assembling part 222, and the boss 221 is surrounded by the first assembling part 222, so as to avoid interference with each other. In other embodiments, the hollow assembling part 121 may not be provided, and the accommodation cavity and the second tooth groove 12 are directly communicated through the through hole to facilitate the connection between the rider and the acting part 8.

[0080] The second unlocking device further includes a third driving member 74 that is disposed on the rider 2 so as to be movable up and down relatively, and a second connecting member 75 whose upper end is connected to the third driving member 74. The lower end of the second connecting member 75 is connected to the second driving member 73. When the third driving member 74 moves upward, the second driving member 73 can be pulled to rotate through the second connecting member 75.

[0081] The rider 2 is further provided with a second driving device that can drive the second unlocking device to unlock the second locking mechanism. The second driving device includes a second driving group 76 that is movably connected to the rider 2, and a third connecting member 77 whose upper end is connected to the second driving group 76. The lower end of the third connecting member 77 is connected to the third driving member 74. Driving the second driving group 76 to move, the third driving member 74 can be pulled to move upward through the third connecting member 77, and then the second driving member 73 can be pulled to rotate through the second connecting member 75. When the second driving member 73 rotates, through the cooperation of the active inclined surface 2211 and the driven inclined surface 7311, the second driving member 73 moves in the direction of the gear 71 at the same time, so as to push the gear 71 to move in the direction of the second tooth groove 12. When the gear 71 disengages from the first tooth groove 22 and only meshes with the second tooth groove 12, the second locking mechanism is unlocked, and the rider 2 can rotate relative to the hind foot 1. When the third driving member 74 is released, under the action of the second elastic member, the gear 71 and the second driving member 73 move in the direction of the first tooth groove 22, and through the cooperation of the active inclined surface 2211 and the driven inclined surface 7311, the second driving member 73 rotates in the reverse direction, so as to pull the third driving member 74 to move downward through the third connecting member 77.

[0082] In this embodiment, the second driving group 76 is arranged as an unlocking member that is connected to the rider 2 so as to be movable up and down relatively. Moving the unlocking member 76 upward can pull the third driving member 74 to move upward through the third connecting member 77. In other embodiments, the second driving group 76 can also adopt any other well-known and feasible technologies. Since it is not the focus of the present invention, it will not be elaborated here.

[0083] When the rider 2 in the rearward position needs to be rotated to the forward position, the second locking mechanism is unlocked through the second driving device, and then the rider 2 is rotated forward. The acting member 8 rotates together with the rider 2, and the limiting portion 82 on the acting member 8 rotates in the arc-shaped limiting groove 101. When the limiting portion 82 rotates to contact one end of the arc-shaped limiting groove 101, the limiting portion 82 can no longer rotate forward, that is, the acting member 8 and the rider 2 can no longer rotate forward, that is, the rider 2 rotates to the forward position. At this time, the gear 71 moves under the action of the second elastic member and meshes with the first tooth groove 22 and the second tooth groove 12 again, so that the rider 2 is locked in this forward position.

[0084] Similarly, when the rider 2 in the forward position needs to be rotated to the backward position, the second locking mechanism is unlocked by the second driving device, and then the rider is rotated backward to the backward position.

[0085] In this embodiment, the third driving member 74 is disposed inside the rider 2. In other embodiments, a part of the third driving member 74 is located inside the rider, and a part extends outside the rider 2. Thus, by directly moving upward the part of the third driving member 74 exposed outside the rider, the entire third driving member 74 can be moved upward, thereby unlocking the second locking mechanism.

[0086] The stroller further includes a connecting pipe 45, and the lower side of the connecting pipe 45 is also pivotally connected to the rear foot 1. Preferably, the lower side of the connecting pipe 45 is pivotally connected to the rear foot 1 rotatably about a first rotating shaft, the lower side of the rider 2 is pivotally connected to the rear foot 1 rotatably about a second rotating shaft, the first rotating shaft and the second rotating shaft are arranged in parallel, or the first rotating shaft and the second rotating shaft are the same rotating shaft, or the first rotating shaft and the second rotating shaft are on the same straight line. Thus, during the folding process of the stroller of the present invention, the rider 2 and the connecting pipe 45 can rotate at the same angle, so that the folding operation is smoother.

[0087] Preferably, the lower side of the connecting pipe 45 is pivotally connected to the side of the rear foot 1 away from the rider 2. In this embodiment, the lower side of the rider 2 is located on the side of the acting member 8 away from the rider 2, and the lower side of the connecting pipe 45, the acting member 8, the rear foot 1, and the rider 2 are coaxially arranged through the rotating shaft 120. Thus, the assembly is more convenient and the overall structure is more compact.

[0088] A first adapter 64 is provided on the rider 2, and a second adapter 65 is provided on the connecting pipe 45. The first adapter 64 and the second adapter 65 are detachably connected; when the rider 2 is in the backward position, the first adapter 64 and the second adapter 65 are connected, and when the rider 2 rotates forward from the backward position, the first adapter 64 is disengaged from the second adapter 65. With such a setting, when the stroller of the present invention is in the unfolded state, the rider 2 can be rotated forward and backward; when the rider 2 is in the backward position, since the first adapter 64 and the second adapter 65 are connected, the rider 2 is positioned at the backward position, and when the first adapter 64 moves upward, it can drive the second adapter 65 to move upward together; during folding, when the rider 2 rotates backward, the first adapter 64 can push the connecting pipe 45 to move backward and downward together through the second adapter 65.

[0089] In this embodiment, the second adapter 65 is at least partially located outside the connecting tube 45, and the part of the second adapter 65 located outside the connecting tube 45 is provided with a contact groove 651 that opens forward, and when the rider 2 is in the rearward position, the other side of the first adapter 64 is placed in the contact groove 651. In this way, when the child stroller is in the unfolded state, the rear side of the first adapter 64 is blocked by the rear wall of the contact groove 651, so that the rider 2 is positioned in the rearward position and cannot continue to rotate backward and downward; when the child stroller is folded, the rider 2 can push the rear wall of the contact groove 651 when rotating backward, thereby driving the seat backrest tube to rotate together. However, when the child stroller of the present invention is in the unfolded state, when the rider 2 rotates forward from the rearward position, the first adapter 64 can be separated from the second adapter 65 from the opening, so that the forward rotation of the rider 2 will not be blocked, that is, as long as the second locking mechanism is unlocked, the rider 2 can be directly adjusted to the forward position by rotating the rider 2 forward.

[0090] Preferably, the connecting tube 45 is further provided with a contact member 46 extending toward the driver 2, and the unlocking member 76 is further provided with a contact portion 761 (such as Figure 21 As shown in FIG. 1 , when the rider 2 is in the rearward position, the rear side of the contact portion 761 contacts the contact member 46. With this arrangement, when the child stroller is in the unfolded state, the rider 2 is more stable when in the rearward position.

[0091] A first locking mechanism for restricting the connection tube 45 and the rear leg 1 is provided between the lower side of the connection tube 45 and the rear leg 1. In this embodiment, the first locking mechanism comprises a first locking member 61 connected to the backrest tube and movable up and down relatively, a first elastic member 62 provided between the first locking member 61 and the connection tube 45, and a first locking groove 11 provided on the rear leg 1 and opening upward; when the child stroller is in the unfolded state, under the action of the first elastic member 62, the first locking member 61 moves downward and the lower side extends into the first locking groove 11, the first locking mechanism is in the locked state, the connection tube 45 cannot rotate relative to the rear leg 1, and the child stroller of the present invention cannot be folded.

[0092] The handle 2 is provided with a first unlocking device, and the first unlocking device is arranged in cooperation with the first locking mechanism; the first unlocking device can be driven to unlock the first locking mechanism, and the handle is rotated to drive the connecting pipe to rotate in the same direction, so as to fold the stroller. Preferably, the second unlocking device is connected to the first unlocking device, and the two are arranged so that when the first unlocking device is driven to unlock the first locking device, the second unlocking device can be linked to unlock the second locking mechanism; when the second unlocking device is driven to unlock the second locking device, the first unlocking device is not linked to unlock the first locking device.

[0093] The first unlocking device includes the first adapter 64 and a first driving member 63 movably connected up and down relative to the carriage body 2. One side of the first adapter 64 is connected to the first driving member 63 and can move up and down therewith. The second adapter 65 is connected to the first locking member 61. Thus, when the first adapter 64 is connected to the second adapter 65, by moving the first driving member 63 upward, the second adapter 65 can be driven to move upward through the first adapter 64, so as to drive the first locking member 61 to move upward and disengage from the first locking groove 11, and the first locking mechanism is unlocked, and the connecting pipe 45 and the rear foot 1 can rotate relative to each other.

[0094] A third elastic member 66 for driving the first driving member 63 to move downward is arranged between the first driving member 63 and the carriage body 2, so as to facilitate the automatic reset of the second adapter 65 and the first locking member 61.

[0095] The upper side of the first locking member 61 is movably placed in the connecting pipe 45 up and down. On the side of the side wall of the connecting pipe 45 facing the rear of the carriage 2, a second elongated hole 451 extending up and down is provided for the connecting part of the second adapter 65 and the first locking member 61 to move up and down. Similarly, on the side of the side wall of the carriage body 2 facing the connecting pipe 45, a first elongated hole 21 extending up and down is provided for the other side of the first adapter 64 to extend out and move up and down.

[0096] In this embodiment, a mounting member 67 is fixedly connected to the inside of the carriage body 2, and the mounting member 67 is provided with a receiving groove 671 opening in the direction of the connecting pipe 45. The first driving member 63 is movably placed in the receiving groove 671, and the third elastic member 66 is arranged between the top of the first driving member 63 and the top wall of the receiving groove 671. Preferably, when the baby stroller is in the unfolded state, under the action of the third elastic member 66, the lower end of the first driving member 63 contacts the bottom wall of the receiving groove 671. Such a setting makes the structure more stable, that is, the baby stroller of the present invention is more stable when in the unfolded state, so as to be safer to use.

[0097] The carriage body 2 is provided with a first driving device for driving the first unlocking device to unlock the first locking mechanism. In this embodiment, the first driving device includes a first driving group movably arranged on the upper side of the carriage body 2 and a first connecting member 69 connected to the upper side of the first driving group. The lower side of the first connecting member 69 is connected to the first driving member 63. By operating the first driving group, the first driving member 63 can be pulled upward through the first connecting member 69.

[0098] Preferably, the top wall of the mounting member 67 is provided with a first avoiding hole 672, and the lower end of the first connecting member 69 passes downward through the first avoiding hole 672 and then is connected to the first driving member 63.

[0099] In other embodiments, the first driving device may not be provided, and the first driving member 63 is arranged such that a part thereof extends out of the carriage (not shown in the figure). By directly moving upward the part of the first driving member 63 that extends out of the carriage, the first driving member 63 can be moved upward, thereby unlocking the first locking mechanism.

[0100] The third driving member 74 is connected to the first driving member 63 so as to be relatively movable up and down, and the first driving member 63 and the third driving member 74 are arranged such that when the third driving member 74 moves upward, the first driving member 63 can be driven to move upward together; when the third driving member 74 moves upward, the first driving member 63 is not driven to move upward.

[0101] The third driving member 74 is provided with a long hole 741 extending up and down, and a part of the first driving member 63 or / and the first adapter 64 passes through the long hole 741. Under the action of the second elastic member, a part of the first driving member 63 or / and the first adapter 64 contacts the top wall of the long hole 741 of the third driving member 74. With such an arrangement, whether the carriage 2 is in the rearward position or the forward position, when the third driving member 74 moves upward, the first driving member 63 and the first adapter 64 will not be driven to move upward; however, when the first driving member 63 moves upward, the third driving member 74 will be driven to move upward together. With such an arrangement, when the baby carriage is in the unfolded state, not only can the second locking mechanism be unlocked separately without affecting the first unlocking device, and then the carriage 2 can be rotated forward and backward to realize the forward and backward commutation function of the carriage 2, that is, to ensure the safety of the baby carriage of the present invention during use; moreover, when the carriage 2 is in the rearward position, the second locking mechanism can be unlocked by operating to unlock the first locking mechanism, that is, the first locking device and the second locking mechanism can be unlocked at one time without performing different operations to unlock, thereby making the unlocking operation of the baby carriage of the present invention simpler.

[0102] The first driving member 63 protrudes with a mounting boss 634 on the side facing the connecting pipe 45. The mounting boss 634 is provided with a hole 6341. One side of the first adapter 64 is inserted into the hole 6341 of the mounting boss 634, thereby realizing the connection between the first adapter 64 and the first driving member 63; the mounting boss 634 passes through the long hole 741 and contacts the top wall of the long hole 741 of the third driving member 74. In this way, the structure is more stable. In other embodiments, it may also be that the vertical portion 631 is provided with a concave hole, and one end of the first adapter 64 extends into the concave hole; correspondingly, the first adapter 64 contacts the top wall of the long hole 741 of the third driving member 74.

[0103] In this embodiment, the first driving member 63 includes a vertical portion 631, an upper wall portion 632 and a lower wall portion 633 respectively connected to the upper and lower ends of the vertical portion 631. The third driving member 74 is disposed between the upper wall portion 632 and the lower wall portion 633 so as to be movable relatively up and down. The mounting boss 634 is disposed on the vertical portion 631. Under the action of the second elastic member, the lower end of the third driving member 74 contacts the lower wall portion 633. With such a setting, the connection between the third driving member 74 and the first driving member 63 and the mounting member 67 is more stable, so that the baby stroller is more stable in the unfolded state and safer to use.

[0104] A second avoidance hole 674 is further provided on the top wall of the mounting member 67, and the first avoidance hole 672 and the second avoidance hole 674 are spaced apart; a corresponding third avoidance hole 630 is also provided on the upper wall portion 632 of the first driving member 63. The lower end of the third connecting member 77 passes downward through the first avoidance hole 672 and the third avoidance hole 630 and then is connected to the third driving member 74. With such a setting, the first connecting member 69 and the third connecting member 77 can be made not to interfere with each other, so as to further ensure that when the second driving device is operated, the first unlocking device will not be driven to act.

[0105] The baby stroller further includes an interlocking folding device disposed between the rear legs 1, the front legs 3 and the connecting pipe 45. The interlocking folding device is configured such that when the stroller body 2 rotates backward and downward from the rearward position, the front legs 3 and the rear legs 1 can be driven to rotate relatively closer through the interlocking folding device.

[0106] In this embodiment, the interlocking folding device includes a first interlocking member 41, a second interlocking member 42, and a third interlocking member 5. The front side of the first interlocking member 41 is pivotally connected to the front legs 3, the rear side of the second interlocking member 42 is pivotally connected to the rear legs 1, the upper side of the third interlocking member 5 is pivotally connected to the connecting pipe 45, and the lower side is coaxially pivotally connected to the rear side of the first interlocking member 41 and the front side of the second interlocking member 42, or pivotally connected to two of them, and the third one is pivotally connected to any one of the two.

[0107] When the baby stroller of the present invention is in the unfolded state, the pivotal connection position between the upper side of the third interlocking member 5 and the connecting pipe 45 is located above the pivotal connection position between the connecting pipe 45 and the rear legs 1; the pivotal connection position between the front side of the first interlocking member 41 and the front legs 3 is located below the pivotal connection position between the front legs 3 and the rear legs 1; the pivotal connection position between the rear side of the second interlocking member 42 and the rear legs 1 is located below the pivotal connection position between the rear legs 1 and the stroller body 2 or / and the front legs 3.

[0108] The first linkage member 41 can be set as the seating part of a seat, that is, the first linkage member 41 is the seating part of the seat. Or the first linkage member 41 can be the front seating part of a seat, and the second linkage member 42 is the rear seating part of the seat, that is, both the first linkage member 41 and the second linkage member 42 are parts of the seating part of a seat. The connecting pipe 45 can be used to connect with the periphery of the front side of the seat cloth of a seat, and the seat cloth is also connected to the seating part of the seat. The connection modes of the seat cloth with the connecting pipe and the seat can be any well-known and feasible structures. Since it is not the inventive point of the present invention, it will not be elaborated here.

[0109] The baby stroller of the present invention further includes a calf support 43. The upper side of the calf support 43 is pivotally connected to the front foot 2, and a device for adjusting the rotation angle of the calf support 43 relative to the front foot 2 is provided between the upper side of the calf support 43 and the front foot 2. Through this device, the rotation angle of the calf support 43 relative to the front foot 2 can be adjusted, that is, the inclination angle of the calf support 43 relative to the front seat part 41 can be adjusted, so as to adapt to the different usage requirements of different children. This device can be any well-known and feasible structure, and it is not the inventive point of the present invention, so it will not be elaborated here.

[0110] Furthermore, the baby stroller of the present invention further includes a coupling member 44. The coupling member 44 is fixedly connected to the front foot 3 relatively. The upper side of the calf support 43 is pivotally connected to the front foot 2 by pivotally connecting to the front side of the coupling member 44. In this embodiment, in addition to being separately connected to the front foot 3, the rear side of the coupling member 44 is also pivotally connected to the front side of the first linkage member 41 and the front foot 3 coaxially, so as to realize the relative fixed connection of the connecting member and the front foot 3 and at the same time realize the pivotal connection of the first linkage member 41 and the front foot 3. In this way, the overall assembly is more convenient, and the overall layout of the structure is more compact.

[0111] Because the baby crib of the present invention adopts the above arrangement, when the rear 2 of the stroller is in the forward position, the first adapter 64 is disconnected from the second adapter 65, so that the first unlocking device cannot be operated to unlock the first locking mechanism, and the stroller cannot be folded. The stroller of the present invention can only be folded when the rider 2 is in the backward position. Specifically, the first driving group is driven to pull the first driving member 63 upward through the first connecting member 69, and then pull the third driving member 74 and the first adapter 64 upward together. When the first adapter 64 moves upward, it will push against the top wall of the contact groove 651 to drive the second adapter 65 to move upward, thereby driving the first locking member 61 to move upward, so that the lower side of the first locking member 61 is disengaged from the engagement with the first locking groove 11, and the first locking mechanism is unlocked; and as mentioned above, the upward movement of the third driving member 74 can make the second driving member 73 move in the direction of the gear 71 to unlock the second locking mechanism. At this time, when the rider 2 rotates downward and backward, the first adapter 64 can push the rear wall of the contact groove 651, thereby driving the connecting tube 45 to rotate downward and backward, so that the third linkage member 5 rotates relative to the connecting tube 45 and rotates downward and backward along with the connecting tube 45. In this way, the lower side of the third linkage member 5 will push the rear side of the first linkage member 41 and the front side of the second linkage member 42 to move downward and rotate, so that the front side of the first linkage member 41 and the rear side of the second linkage member 42 can pull the front foot 3 and the rear foot 1 to rotate relative to each other. If the rear foot 1 is used as a support point and does not move, the front foot 3 rotates backward. If the front foot 3 is used as a support point and does not move, the rear foot 1 rotates forward. In short, the front foot 3 and the rear foot 1 are relatively close to each other, and the angle between the two becomes smaller. Figure 22 , 23 Until the above components can no longer rotate relative to each other, at this time, they are in the folded state (such as Figure 24 That is to say, when the first locking mechanism is unlocked, the second locking mechanism can also be unlocked in conjunction, so that the folding operation of the stroller of the present invention is very simple; and by rotating the handle 2 backward and downward, the other components can be rotated and moved together to fold, so that the folding operation of the stroller of the present invention is very simple.

[0112] The first linking member 41 and the second linking member 42 together form a seat portion for supporting a child to sit on. Therefore, when the stroller of the present invention is folded, the seat is folded together, making the folding operation simpler and more convenient as a whole.

[0113] The first connecting member 69, the second connecting member 75, the third connecting member 77, the fourth connecting member 36, and the fifth connecting member 18 can all be configured as steel wires or similar structures.

[0114] In this embodiment, the stroller includes a push handle 68 pivotally connected to the upper side of the stroller body 2. The push handle 68 is set as the first driving group. By rotating the push handle 68 downward, the first connecting member 69 can be pulled upward, thereby pulling the first driving member 63 upward. With such a setting, when the stroller is folded, the push handle 68 is also folded at the same time, thereby reducing the overall height of the folded stroller of the present invention, and further reducing the overall volume of the folded stroller.

[0115] The specific structure and its operating principle for the push handle 68 to drive the first connecting member 69 to move upward can adopt any known and feasible technology. Since it is not the focus of the present invention, it will not be elaborated here.

[0116] In other embodiments, the first driving group can also be set on any other known and feasible structure on the stroller body, as long as the first unlocking device can be driven to unlock the first locking mechanism by operating the first driving group. For example, the first driving group can also be set as a component that is connected to the stroller body 2 and can move relatively up and down. By moving this component upward, the first connecting member can be pulled upward, thereby pulling the first driving member upward to unlock the first locking mechanism. Also, for example, the first driving group can also be set as a component that is connected to the stroller body 2 and can rotate relatively. By rotating this component relative to the stroller body, the first connecting member can be pulled upward, thereby pulling the first driving member upward to unlock the first locking mechanism. Another example is that the first driving group can also be set as a button that is connected to the stroller body 2 and can move relatively. By pressing this component, the first connecting member can be pulled upward, thereby pulling the first driving member upward to unlock the first locking mechanism. These are not listed one by one here.

[0117] 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 rear foot 1. And the armrest 9 can be set to be detachably connected or rotatably connected relative to the rear foot 1. When it is detachably connected, the armrest can be removed after the stroller is folded. When it is rotatably connected relative to the rear foot 1, when the stroller is folded, the armrest can be rotated to approach the front foot 3 or the rear foot 1. With the above settings, the overall height of the folded stroller of the present invention can be reduced, that is, the overall volume can be reduced. The rear side of the armrest 9 can also be set to be fixedly connected to the rear foot 1.

[0118] 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 is located is regarded as the front, the position where the rear wheel is located is regarded as the rear, the position where the rider is located is regarded as the upper, the positions where the front wheel and the rear wheel are located are regarded as the lower, and the rider and the seat backrest tube are respectively located on the left and right sides of the rear foot. 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 baby stroller that can be switched between an unfolded state and a folded state, the baby stroller includes rear legs, a seat, and front legs pivotally connected to the rear legs at the rear side. The lower side of the seat is pivotally connected to the rear legs or / and the front legs, and the seat is configured to be rotatable and switchable between a rear-facing position and a forward-facing position. It is characterized in that: The lower sides of the front foot and the rear foot are respectively connected to a front wheel group and a rear wheel group that can rotate horizontally; a front wheel orientation mechanism and a rear wheel orientation mechanism that can limit the relative horizontal rotation of the corresponding two are respectively arranged between the front foot and the front wheel group and between the rear foot and the rear wheel group; an acting member that can rotate together with the driver is connected to the lower side of the driver, and a front wheel linkage device and a rear wheel linkage device are respectively arranged between the front wheel orientation mechanism, the rear wheel orientation mechanism and the acting member; the acting member includes a body, and the body is configured to be cam-shaped, and the sides of the front wheel linkage device and the rear wheel linkage device facing the acting member are both in contact with the outer surface of the cam-shaped body; during the rotation and reversing process of the driver, the contact positions of the front wheel linkage device and the rear wheel linkage device with the outer surface of the cam-shaped body rotate and change, thereby linking and changing the unlocking state or locking state of the front wheel orientation mechanism and the rear wheel orientation mechanism.

2. The stroller for children according to claim 1, characterized in that: When the rider rotates to the rearward position, the rear wheel orientation mechanism is linked to the locked state through the rear wheel linkage device, and the front wheel orientation mechanism is linked to the unlocked state through the front wheel linkage device; when the rider rotates to the forward position, the rear wheel orientation mechanism is linked to the unlocked state through the rear wheel linkage device, and the front wheel orientation mechanism is linked to the locked state through the front wheel linkage device.

3. The stroller for children according to claim 1 or 2, characterized in that: The radius of the base circle of the cam-shaped body is smaller than the straight-line distance between the center of the base circle and the outer surface of the non-base circle part. When the rider is in a rearward position, one side of the front wheel linkage device contacts the outer surface of the base circle of the cam-shaped body, and the rear wheel linkage device contacts the outer surface of the non-base circle of the cam-shaped body; when the rider rotates to a forward position, the rear wheel linkage device contacts the outer surface of the base circle of the cam-shaped body, and the front wheel linkage device contacts the outer surface of the non-base circle of the cam-shaped body.

4. The stroller for children according to any one of claims 1 to 3, characterized in that: The front wheel linkage device comprises a front wheel guide member that can move relative to the front foot or / and the rear foot, a fifth elastic member that is arranged between the front wheel guide member and the front foot and can drive the rear wheel guide member to move in the direction of the action member, a fourth connecting member that is connected to the front wheel guide member on the upper side, the fourth connecting member is connected to the front wheel orientation mechanism on the lower side, and the front wheel guide member is in contact with the outer surface of the cam-shaped body; preferably, under the action of the fifth elastic member, the front wheel guide member always keeps in contact with the outer surface of the cam-shaped body; preferably, the rear wheel linkage device comprises a rear wheel guide member that can move up and down relative to the rear foot, a seventh elastic member that is arranged between the rear wheel guide member and the rear foot and can drive the rear wheel guide member to move in the direction of the action member, a fifth connecting member that is connected to the rear wheel guide member on the upper side, and the fourth connecting member is connected to the rear wheel orientation mechanism on the lower side; the rear wheel guide member is in contact with the outer surface of the cam-shaped body; preferably, under the action of the seventh elastic member, the rear wheel guide member always keeps in contact with the outer surface of the cam-shaped body.

5. The stroller for children according to claim 4, characterized in that: When the contact position between the front wheel driving member or the rear wheel driving member and the outer surface of the body rotates from the non-base circle outer surface to the base circle outer surface, the front wheel driving member or the rear wheel driving member moves toward the direction of the action member, thereby pulling the corresponding fourth connecting member or the fifth connecting member to link the corresponding front wheel directional mechanism or the rear wheel directional mechanism to unlock; When the contact position between the front wheel driving member or the rear wheel driving member and the outer surface of the body rotates from the base circle outer surface to the non-base circle outer surface, the front wheel driving member or the rear wheel driving member moves in the direction away from the acting member, thereby releasing the pull on the corresponding fourth connecting member or the fifth connecting member, and the corresponding front wheel directional mechanism or the rear wheel directional mechanism may be in a locked state.

6. The stroller for children according to claim 4 or 5, characterized in that: The front-wheel orientation mechanism comprises a front-wheel orientation piece connected to the lower side of the front foot so as to be relatively movably up and down, a first matching portion arranged on the front wheel assembly and capable of matching with the front-wheel orientation piece, a sixth elastic piece arranged between the front-wheel orientation piece and the front foot and capable of driving the front-wheel orientation piece to move downward, and the lower side of the fourth connecting piece is connected to the front-wheel orientation piece; preferably, the rear-wheel orientation mechanism comprises a rear-wheel orientation piece connected to the lower side of the rear foot so as to be relatively movably up and down, a second matching portion arranged on the rear wheel assembly and capable of matching with the rear-wheel orientation piece, an eighth elastic piece arranged between the rear-wheel orientation piece and the rear foot and capable of driving the rear-wheel orientation piece to move downward, and the lower side of the seventh connecting piece is connected to the rear-wheel orientation piece.

7. The stroller for children according to any one of claims 3 to 6, characterized in that: The cooperation between the cam-shaped body and the front wheel linkage device, the rear wheel linkage device, the front wheel orientation mechanism and the rear wheel orientation mechanism is configured so that when the rider rotates relative to the front foot and the rear foot during the folding process of the stroller, the rear wheel orientation mechanism remains in a locked state and the front wheel orientation mechanism remains in an unlocked state.

8. The stroller for children according to claim 7, characterized in that: The cam-shaped body comprises a first cam and a second cam having a base circle with the same diameter as the base circle of the first cam and coaxially arranged on one side of the first cam; the base circles of the first cam and the second cam are partially overlapped left and right, and the non-base circle parts of the first cam and the second cam extending from the overlapping base circle parts to the front side are also overlapped left and right, the part of the first cam extending from the overlapping base circle parts to the rear side is the non-base circle, and the part of the second cam extending from the overlapping base circle parts to the rear side is the base circle; when the rider is in a rearward position, the front wheel directional member only contacts the outer surface of the base circle of the second cam, and the rear wheel directional member only contacts the outer surface of the non-base circle of the first cam; During the folding process of the child stroller, the rider rotates backward from the rearward position.

9. The stroller for children according to any one of claims 1 to 8, characterized in that: The rear foot is provided with a limiting structure which cooperates with the action member, and the limiting structure is arranged so that when the rider rotates from the rearward position to the forward position, the cooperation between the action member and the limiting structure prevents the rider from rotating forward any further.

10. The stroller for children according to any one of claims 1 to 9, characterized in that: A accommodating cavity is provided on the rear foot, the body of the acting member is placed in the accommodating cavity, the front wheel driving member and the rear wheel driving member extend into the accommodating cavity toward one side of the acting member and contact the outer surface of the cam-shaped body; preferably, an arc-shaped limiting groove which is not connected end to end is recessed on the bottom wall of the accommodating cavity, and the limiting groove is configured as the limiting structure; the acting member also includes a limiting portion extending from the body toward one side of the bottom wall of the accommodating cavity; the limiting portion can be relatively rotatably placed in the arc-shaped limiting groove, and when the rider is in the forward position, the limiting portion abuts against one end of the limiting groove; preferably, the limiting portion is arranged on the side of the second cam facing the bottom wall of the accommodating cavity; preferably, the outer surface of the limiting portion is configured not to extend beyond the outer surface of the second cam base circle.

11. The stroller for children according to claim 10, characterized in that: The accommodating chamber is arranged on the side of the back of the foot away from the rider, and a through hole is arranged on the bottom wall of the accommodating chamber to communicate with the rider, and the lower side of the rider is connected to the action member through the through hole; preferably, the through hole is arranged coaxially with the base circle of the cam-shaped body; preferably, a first assembling part is arranged on the side of the rider facing the action member, and the action member is also provided with a matching platform on the side of the body facing the rider, and one of the first assembling part and the matching platform is recessed with a matching square hole on the side facing the other, and the other is arranged in a square shape, and the other extends into the matching square hole; preferably, the action member also includes a main body extending from the second cam to the side facing the rider, the main body is arranged coaxially with the base circle of the main body, the limiting part is convexly arranged on the outer circle of the main body, and the main body penetrates the through hole; the square matching platform extends from the main body toward the rider.

12. The stroller for children according to claim 11, characterized in that: A second locking mechanism for limiting relative rotation between the lower side of the rider and the opposite side of the rear foot is provided; preferably, the second locking mechanism comprises a first tooth groove and a second tooth groove respectively provided on the opposite side of the rider and the rear foot, a gear relatively movable leftward and rightward in the first tooth groove and the second tooth groove, and a second elastic member provided between the bottom wall of the second tooth groove and the gear; under the action of the second elastic member, the gear is meshed with the first tooth groove and the second tooth groove at the same time; preferably, the second tooth groove is provided on the side of the rear foot away from the accommodating chamber, and the through hole is coaxially provided with the second tooth groove; preferably, the first assembling portion extends from the bottom wall of the first tooth groove toward the side facing the action member.

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