Baby stroller convenient to brake

Abstract

The invention discloses a baby stroller convenient to brake, which comprises a rear leg, a front leg and a handlebar which are pivoted, and the handlebar can be reversed between a backward position and a forward position; the lower sides of the front feet and the rear feet are respectively connected with a front wheel set and a rear wheel set which can rotate horizontally, brake mechanisms are arranged on the front wheel set and the rear wheel set, and brake driving devices are arranged on the front feet and the rear feet; when the handlebar rotates to the backward position, the rear wheel set is located at a first angle position and is oriented; at the moment, the brake mechanism on the rear wheel set is in a state of being matched with the brake driving device on the rear foot, and the brake driving device on the rear foot can be driven to brake; when the handlebar rotates to the forward position, the front wheel set is located at the second angle position relative to the front foot and is oriented, and at the moment, the brake mechanism on the front wheel set is in the state of being capable of being matched with the brake driving device on the front wheel to drive the brake driving device on the front foot to brake; therefore, the brake operation is very convenient.

Description

Technical Field

[0001] The present invention relates to the field of baby products, and in particular to a baby stroller with convenient braking. Background Art

[0002] A baby stroller 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 handle of some baby strollers is set to be rotatable and convertible between a forward position and a backward position. When the handle rotates from the forward position, the baby in the stroller faces the parents; when the handle rotates to the backward position, the baby in the stroller faces forward just like the parents. Such a setting can make it more convenient for parents to take care of the baby.

[0004] For use requirements, a corresponding braking device is generally provided on the front feet or the rear feet of a baby stroller. However, for a general baby stroller, the braking device is only provided on one of the front feet and the rear feet. When braking, one can only brake on the side where the braking device is provided, and the wheel seat on the lower side of the front foot or the rear foot where the braking device is provided needs to be rotated to a position where braking is possible first, so the braking operation is not convenient. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned drawbacks and provide a baby stroller with convenient braking. Braking mechanisms and brake unlocking devices are provided both at the front and the rear, and regardless of whether the handle is in the forward position or the backward position, the braking mechanism on the side of the operator is exactly in a state where it can cooperate with the corresponding brake driving device. Therefore, only by operating the brake driving device can braking be performed, without the need to additionally operate to rotate the front wheel set / rear wheel set to a just-matching state, thus making the braking operation extremely convenient.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is:

[0007] A baby stroller with convenient braking, which includes rear feet, a stroller body, and front feet pivotally connected to the rear feet at the rear side. The lower side of the stroller body is pivotally connected to the rear feet or / and the front feet, and the stroller body is arranged to be rotatable and convertible between a rearward position and a forward position; horizontally rotatable front wheel sets and rear wheel sets are respectively connected to the lower sides of the front feet and the rear feet. When the stroller body rotates to the rearward position, the rear wheel sets are linked to be converted to a fixed state, and the rear wheel sets are in a first angular position relative to the rear feet; when the stroller body rotates to the forward position, the front wheel sets are linked to be converted to a fixed state, and the front wheel sets are in a second angular position relative to the front feet; braking mechanisms are arranged on both the front wheel sets and the rear wheel sets, and braking driving devices are arranged on both the front feet and the rear feet; when the rear wheel sets are in the first angular position relative to the rear feet, the braking mechanisms on the rear wheel sets are in a state that can cooperate with the braking driving devices on the rear feet, and driving the braking driving devices on the rear feet can make the braking mechanisms on the rear wheel sets be in a braking state; when the front wheel sets are in the second angular position relative to the front feet, the braking mechanisms on the front wheel sets are in a state that can cooperate with the braking driving devices on the front feet, and driving the braking driving devices on the front feet can make the braking mechanisms be in a braking state.

[0008] Since the present invention adopts the above technical solutions, the following beneficial effects are achieved:

[0009] 1. Braking mechanisms and braking unlocking devices are provided at both the front and the rear. Moreover, regardless of whether the stroller body is in the forward position or the rearward position, the braking mechanisms on the side of the operator are exactly in a state that can cooperate with the corresponding braking driving devices. Therefore, only by operating the braking driving devices can braking be performed, without the need to additionally operate to rotate the front wheel sets / rear wheel sets to a just-matching state; thus, the braking operation is extremely convenient.

[0010] 2. Regardless of whether the stroller body is in the forward position or the rearward position, when parents push the baby stroller forward through the stroller body, the wheel sets on the front side in the forward direction of the baby stroller can rotate horizontally, while the wheel sets on the rear side cannot rotate horizontally. Therefore, when the baby stroller is moving forward, if there are slight obstacles on the road, the front wheel sets can rotate horizontally to avoid them, while the rear wheel sets maintain their original traveling direction, which can make the progress of the baby stroller smoother and safer. Description of the Drawings

[0011] Figure 1 Stereo schematic of the baby stroller of the present invention in the deployed state when the stroller body is in the rearward position Figure 1 ;

[0012] Figure 2 Stereo schematic of the baby stroller of the present invention in the deployed state when the stroller body is in the rearward position Figure 2 ;

[0013] Figure 3This is a schematic plan view of the stroller of the present invention in the unfolded state when the rider is in the forward position;

[0014] Figure 4 This is an exploded enlarged schematic view of some functional components of the stroller of the present invention when the rider is in the rearward position;

[0015] Figure 5 This is an enlarged schematic view of the rear wheel set and the rear wheel orienting member of the stroller of the present invention;

[0016] Figure 6 It is a Figure 2 Enlarged sectional view taken along the C-C direction in;

[0017] Figure 7 It is a Figure 1 Exploded enlarged schematic view of part A in;

[0018] Figure 8 It is a Figure 7 Exploded enlarged schematic view of some components in;

[0019] Figure 9 It is an exploded enlarged schematic view of the mating part and the second brake transmission part;

[0020] Figure 10 It is an enlarged perspective view from below of the rear foot part;

[0021] Figure 11 It is a Figure 1 Enlarged sectional view taken along the B-B direction in;

[0022] Figure 12 It is a Figure 11 Enlarged view of part H in;

[0023] Figure 13 It is a Figure 11 Enlarged view of part I in.

[0024] Figure 14 It is an exploded enlarged schematic view of the front foot part, the front wheel seat and the brake mechanism;

[0025] Figure 15 It is a Figure 2 Enlarged sectional view taken along the F-F direction in;

[0026] Figure 16 It is a Figure 4 Enlarged plan view of part G in when the rider is in the rearward position;

[0027] Figure 17 It is an enlarged view from another angle of the acting part, the front wheel actuating part and the rear wheel actuating part when the rider is in the rearward position;

[0028] Figure 18 Another enlarged schematic view of the actuating member, front wheel actuating member, and rear wheel actuating member at another angle when in the rear-facing position of the rider;

[0029] Figure 19 When in the forward-facing position of the rider according to Figure 4 An enlarged plan view of part D in

[0030] Figure 20 Another enlarged schematic view of the actuating member, front wheel actuating member, and rear wheel actuating member at another angle when in the rear-facing position of the rider;

[0031] Figure 21 When the stroller is in the folded state according to Figure 4 An enlarged plan view of part D in

[0032] Figure 22 Another enlarged schematic view of the actuating member, front wheel actuating member, and rear wheel actuating member at another angle when the stroller is in the folded state;

[0033] Figure 23 According to Figure 1 An enlarged sectional view taken along the E-E direction in

[0034] Figure 24 According to Figure 1 An exploded enlarged view of part D in

[0035] Figure 25 An enlarged schematic view of the second driving member;

[0036] Figure 26 An enlarged schematic view of the actuating member;

[0037] Figure 27 According to Figure 2 Another exploded enlarged view of part C in

[0038] Figure 28 A three-dimensional schematic view of another embodiment of the present invention. Detailed implementation manner

[0039] Such as Figures 1 to 15As shown, the present invention discloses a baby stroller with convenient braking, which can be switched between an unfolded state and a folded state. The baby stroller includes a rear foot 1, a stroller body 2, and a front foot 3 pivotally connected to the rear foot 1 at the rear side. The lower side of the stroller body 2 is pivotally connected to the rear foot 1 or / and the front foot 3, and the stroller body 2 is arranged to be rotatable and convertible between a rearward position and a forward position; the lower sides of the front foot 3 and the rear foot 1 are respectively connected with a horizontally rotatable front wheel set and a rear wheel set; when the stroller body rotates to the rearward position, the rear wheel set is linked to be switched to a fixed state, and the rear wheel set cannot rotate horizontally relative to the rear foot, and the rear wheel set is in a first angular position relative to the rear foot; when the stroller body rotates to the forward position, the front wheel set is linked to be switched to a fixed state, and the front wheel set cannot rotate horizontally relative to the front foot, and the front wheel set is in a second angular position relative to the front foot; braking mechanisms are arranged on both the front wheel set and the rear wheel set, and braking driving devices are arranged on both the front foot and the rear foot; when the rear wheel set is in the first angular position relative to the rear foot, the braking mechanism on the rear wheel set is in a state that can cooperate with the braking driving device on the rear foot, and driving the braking driving device on the rear foot can make the braking mechanism on the rear wheel set in a braking state; when the front wheel set is in the second angular position relative to the front foot, the braking mechanism on the front wheel set is in a state that can cooperate with the braking driving device on the front foot, and driving the braking driving device on the front foot can make the braking mechanism in a braking state.

[0040] The front wheel set includes a front wheel seat 31 rotatably connected to the front foot 3 horizontally and a front wheel 32 connected to the front wheel seat 31. The rear wheel set includes a rear wheel seat 13 rotatably connected to the rear foot 1 horizontally and a rear wheel 14 connected to the rear wheel seat 13. The braking mechanism on the front wheel set or the rear wheel set includes a braking hole 141, 321 arranged on the front wheel 32 or the rear wheel 14, a first functional cavity 130 with an upward opening arranged on the front wheel seat 31 or the rear wheel seat 13, a braking member 132 movably connected in the first functional cavity 130, and a braking elastic member 133 arranged between the braking member 132 and the front wheel seat 31 or the rear wheel seat 13. The lower side of the braking member 132 is provided with a braking pin (not shown in the figure) on the side facing the front wheel 32 or the rear wheel 14; a through hole (not shown in the figure) is arranged on the side wall of the first functional cavity facing the front wheel 32 or the rear wheel 14. Under the action of the braking elastic members 312, 140, the braking member 132 moves relative to the front wheel seat 31 or the rear wheel seat 13, and the braking pin disengages from the braking hole; driving the upper side of the braking member 132 to move relative to the front wheel seat 31 or the rear wheel seat 13 can link the braking pin on the lower side of the braking member 132 to pass through the through hole and extend into the braking hole for braking.

[0041] When the rider 3 is in the backward position, the first functional cavity 130 on the rear wheel seat 13 is vertically opposite to the lower side of the brake driving device on the rear foot 1, so that the brake driving device can be driven downward into the first accommodation cavity 130 to drive the upper side of the brake member 132 to move relative to the rear wheel seat 13, thereby linking the brake pin to relatively pass through the through hole and extend into the brake hole 141 of the rear wheel 14 to achieve braking. Similarly, when the rider 3 is in the forward position, the first functional cavity on the front wheel seat 31 is vertically opposite to the lower side of the brake driving device on the front foot 3, so that the brake driving device can be driven downward into the first accommodation cavity 130 to drive the upper side of the brake member 132 to move relative to the front wheel seat 31, thereby linking the brake pin to relatively pass through the through hole and snap into the brake hole 321 of the front wheel to achieve braking.

[0042] The brake device on the front foot 3 or the rear foot 1 includes a brake driving member 300, 133 movably connected to the front foot 3 or the rear foot 1, a first brake transmission member 301, 134 connected to the front foot 3 or the rear foot 1 so as to be relatively movable left and right, and a second brake transmission member 135 connected to the front foot 3 or the rear foot 1 so as to be relatively movable up and down. The opposite sides of the brake driving member and the first brake transmission member are cooperatively arranged, and the upper side of the second brake transmission member 135 is cooperatively arranged with the side of the first brake transmission member facing away from the brake driving member; only when the rear wheel set is in the first angular position relative to the rear foot 1, the lower side of the second brake transmission member 135 of the brake device on the rear foot 1 faces the first functional cavity of the rear wheel seat. Thus, when the brake driving member 133 on the rear foot 1 is driven to move relative to the rear foot 1, the first brake transmission member 134 connected to the rear foot 1 is pushed to move in the direction towards the second brake transmission member 135, thereby driving the second brake transmission member 135 to move downward and extend into the first functional cavity 130 to drive the upper side of the brake member 132 to move relative to the wheel seat, and further linking the brake pin on the lower side of the brake member 132 to pass through the through hole and extend into the brake hole 141 of the rear wheel 14 to brake; only when the front wheel set is in the second angular position relative to the front foot 3, the lower side of the second brake transmission member 135 of the brake device on the front foot 3 faces the first functional cavity of the front wheel seat 32. Thus, when the brake driving member 300 on the front foot 3 is driven to move relative to the front foot 3, the first brake transmission member 133 on the front foot 3 is pushed to move in the direction towards the first brake transmission member 134, thereby driving the second brake transmission member 135 to move downward and extend into the first functional cavity 130 to drive the upper side of the brake member 132 to move relative to the front wheel seat 13, and further linking the brake pin on the lower side of the brake member 132 to pass through the through hole and snap into the brake hole of the front wheel 32 to brake. Only when the rear wheel set rotates horizontally relative to the rear foot 1 to a non-first angular position, the lower side of the second brake transmission member 135 of the brake device on the rear foot 1 is misaligned with the first functional cavity of the rear wheel seat, so that the second brake transmission member 135 cannot extend into the first functional cavity, that is, the braking operation cannot be performed.

[0043] In this embodiment, the brake member 132 is pivotally connected within the first functional cavity 130, and the upper and lower sides of the brake member 132 are in a seesaw-like linkage with respect to the corresponding wheel seat. That is to say, under the action of the brake elastic member 312, the upper side of the brake member 132 rotates towards the corresponding front wheel 32 or rear wheel 14, and the lower side of the brake member 132 rotates and moves away from the front wheel 32 or rear wheel 14, thus disengaging from the brake hole; driving the upper side of the brake member 132 to move away from the front wheel 32 or rear wheel 14, the lower side of the brake member 132 will rotate and move towards the front wheel 32 or rear wheel 14, and the brake pin will insert into the brake hole of the front wheel 32 or rear wheel 14 after passing through the through hole, causing the brake mechanism to be in a braking state.

[0044] Preferably, a third inclined surface and a fourth inclined surface 1351 are respectively provided on the side of the first brake transmission member facing away from the brake driving member and the upper side of the second brake transmission member. The upper side of the brake member 132 is provided with a sixth inclined surface 1320 towards the corresponding front wheel 32 or rear wheel 14. Correspondingly, the lower side of the second brake transmission member 135 is provided with a fifth inclined surface 1352 that can cooperate with the sixth inclined surface 1320.

[0045] A second functional cavity 1360 with an opening facing downwards is provided inside the lower sides of both the front foot 3 and the rear foot 1. The second brake transmission member 135 is connected to be relatively movable up and down within the second functional cavity 1360; the second functional cavity 1360 is provided with a first notch 1361 at a position facing the first brake transmission member for the first brake transmission member to insert therein; only when the front wheel group is in a second angular position relative to the front foot 3, the second functional cavity 1360 on the front foot 3 is vertically communicated with the first functional cavity of the front wheel seat 31; when the rear wheel group is in a second angular position relative to the rear foot 1, the second functional cavity 1360 on the rear foot 1 is vertically communicated with the first functional cavity of the rear wheel group seat. Similarly, when the front wheel group rotates horizontally relative to the front foot 3 to a non-second angular position, the second functional cavity 1360 on the front foot 3 is misaligned with the first functional cavity of the front wheel seat 31, so that the second brake transmission member cannot extend into the first functional cavity, that is, the braking operation cannot be performed.

[0046] In this embodiment, a receiving cavity 137 with an opening facing downwards is provided on the lower sides of both the front foot 3 and the rear foot 1. A receiving seat 136 is connected within the receiving cavity 137, and the second functional cavity 1360 is provided within the receiving seat 136. The wall of the receiving cavity 137 is provided with a second notch 1371 at a position facing the first brake transmission member.

[0047] Preferably, a first transmission elastic member capable of driving the first brake transmission member to move toward the brake driving member is disposed between the front feet 3, the rear feet 1 and the first brake transmission member connected thereto, so as to facilitate the reset of the first brake transmission member. A second transmission elastic member capable of driving the second brake transmission member 302 to move upward is disposed between the front feet 3, the rear feet 1 and the second brake transmission member 135 connected thereto, so as to facilitate the reset of the first brake transmission member.

[0048] In this embodiment, the stroller includes two left and right 1000, each of which includes the front feet 3, the rider 3, the rear feet 1, the front wheel set, and the rear wheel set, and the brake mechanism is disposed on the front wheel set and the rear wheel set of each 1000, and the receiving seats 136 and the second brake transmission devices are disposed on the front feet 3 and the rear feet 1 of each 1000. Preferably, the lower sides of the rear feet 1 of the two 1000 are connected by a rear connecting member 1330, the brake driving member is movably connected to the rear connecting member 1330, and two left and right first brake transmission members are provided, which are movably connected to the rear connecting member 1330 relatively left and right and are respectively located on both sides of the brake driving member. Correspondingly, the lower sides of the front feet 3 of the two 1000 are connected by a front connecting member 30, the brake driving member on the front feet 3 is movably connected to the front connecting member 30, and two left and right first brake transmission members are provided, which are movably connected to the front connecting member 30 relatively left and right and are respectively located on both sides of the brake driving member. Thus, when the braking operation can be performed, the two front wheels 32 or the two rear wheels 14 can be braked or unlocked by the brake driving device at one time.

[0049] In one embodiment, in combination with Figures 7 to 13 As shown, the brake driving member 133 is disposed to be movably connected to the front feet 3 or the rear feet 1 relatively up and down, and a first inclined surface and a second inclined surface 1341 are respectively disposed on the opposite sides of the brake driving member 133 and the first brake transmission member 134. Preferably, an elastic reset member (not shown in the figure) is disposed between the brake driving member 133 and the front feet 3 or the rear feet 1, so as to facilitate the elastic reset of the brake driving member 133.

[0050] For more convenient installation, the rear connecting member 1330 is provided with a connecting cavity 1333 extending left and right with a downward opening, and both sides of the connecting cavity communicate with the second notches 1371 on the two rear feet 1 respectively; a reinforcing member 1332 is fixedly connected in the connecting cavity 1333, and the first brake transmission member 134 is movably connected in the reinforcing member 1332. The brake driving member 133 is movably connected to the rear connecting member 1330 and the reinforcing member 1332 relatively up and down, and a hole 1331 is formed in the top wall of the connecting cavity for the brake driving member 133 to extend upward, so as to facilitate stepping on the brake driving member 133.

[0051] In another embodiment, asFigure 14 , 15 As shown in 15 , the brake driving member 300 is arranged to be rotatably connected to the front foot 3 or the rear foot 1 relatively up and down. An arc-shaped driving portion 302 is arranged on one side of the brake driving member 300. The upper end surface of the driving portion 301 is arranged as a driving inclined surface 303, and a clamping groove 304 is arranged at one end of the driving portion 301 facing the second brake transmission member. A second inclined surface 3011 that cooperates with the driving inclined surface 303 is arranged on one side of the first brake transmission member facing away from the second brake transmission member 135, and the top wall of the clamping groove 304 is also arranged as an inclined surface.

[0052] When the brake mechanism is in the unlocked state, the second inclined surface 3011 abuts against the driving inclined surface 303, so as to achieve the purpose of the second inclined surface cooperating with the driving inclined surface 303.

[0053] The driving portion 301 is designed in an arc shape. Thus, when the brake driving member rotates downward, before the brake mechanism brakes, the second inclined surface always remains in a state of abutting against the driving inclined surface 303, that is, the two do not separate, so as to ensure that the rotating brake driving member can indeed push the first brake transmission member 301 to move in the direction towards the second brake transmission member 135.

[0054] The clamping groove 304 is arranged such that when the brake mechanism is in the braking state, one end of the first brake transmission member 301 facing away from the second brake transmission member 135 is inserted into the clamping groove 304. In this way, the brake driving member 300 cannot rotate, so that the brake mechanism can maintain the braking state.

[0055] In this embodiment, preferably, a matching space 3001 is arranged on one side of the brake driving member 300. The arc-shaped driving portion 302 is arranged in the matching space 3001. One side of the first brake transmission member 301 facing away from the second brake transmission member 135 extends into the matching space to cooperate with the driving inclined surface 303 on the upper end surface of the arc-shaped driving portion 302. Corresponding to the left and right first brake transmission members 301, two opposite matching spaces 3001 are arranged on one side of the brake driving member 300.

[0056] In this embodiment, a receiving member 305 is fixedly connected to the lower part of the front connecting member 30. The middle part of the receiving member 305 is disposed in a connecting space 3051. One side of the brake driving member 300 is pivotally connected to the inside of the connecting space 3051 in a relatively rotatable manner up and down. And on both sides of the connecting space provided on one side of the receiving member 305, cavities 306 are respectively provided for movably connecting two first brake transmission members 301. On both sides of the connecting space 3051 on the other side of the receiving member 305, pivot spaces 307 are respectively provided. Both sides of a transfer pipe 308 are fixedly connected to the inside of the pivot space, and the brake driving member 300 is pivotally connected to the transfer pipe 308.

[0057] The brake driving member on the front foot 3 of the present invention adopts a design such as Figure 14 , 15 , that is, a design in which the brake driving member is rotatably connected to the rear foot 1 in a relatively rotatable manner up and down. The brake driving member on the rear foot 1 adopts a design that is movably connected to the rear foot 1 in a relatively movable manner up and down. In other embodiments, they can be interchanged or the same design can be adopted.

[0058] The brake holes 141 and 321 of the front wheel 32 and the rear wheel 14 can be disposed on the wheel hub. This is a conventional design, so it will not be described in detail here.

[0059] When there is no external force, under the action of the brake elastic member 312, the lower sides of the brake members 132 rotate in a direction away from the front wheel 32 or the rear wheel 14, the brake pins disengage from the brake holes of the wheel hub, and the brake mechanism is in an unlocked state. Thus, the front wheel 32 or the rear wheel 14 can rotate, and the baby stroller of the present invention can move forward.

[0060] When the rider 3 rotates to the backward position, the linkage causes the rear wheel set to be in the oriented state, and the rear wheel set is in the second angular position relative to the rear foot 1. At this time, the second functional cavity 1360 in the rear foot 1 is vertically aligned and communicated with the first functional cavity on the rear wheel seat. At this time, the brake driving member 133 on the rear foot 1 can be stepped on downward. Through the interaction between the first inclined surfaces on both sides of the brake driving member 133 and the second inclined surfaces 1341 of the two first brake transmission members 134, the two first brake transmission members 134 move relatively away from each other, that is, both move in the direction towards the second brake transmission 135. As the first brake transmission member 134 moves in this way, the third inclined surface 1342 on the side away from the brake driving member 133 interacts with the fourth inclined surface 1351 on the upper side of the second brake transmission member 135, so that the second brake transmission member 135 moves downward. The lower side of the second brake transmission member 135 extends from the second functional cavity 1360 into the first functional cavity 130. As the second brake member 132 moves downward, the fifth inclined surface 1352 on its lower side contacts and interacts with the sixth inclined surface 1320 on the upper side of the brake member 132, so as to push the upper side of the brake member 132 to rotate in the direction away from the rear wheel 14, so that the lower side of the brake member 132 rotates towards the side where the rear wheel 14 is located. When any brake hole 141 on the hub of the rear wheel 14 is aligned with the brake pin on the lower side of the brake member 132, the brake pin is inserted into the brake hole, the brake mechanism is in the braking state, the rear wheel 14 is braked and cannot rotate, and thus the baby stroller of the present invention cannot move forward. When the brake mechanism is in the braking state, the brake driving member is also in the positioned state and cannot move up and down, so that the braking state of the brake mechanism can be maintained.

[0061] When unlocking the brake mechanism, continue to step on the brake driving member downward so that the brake driving member moves upward in the reverse direction. In this way, under the action of the brake elastic member 312, the first transmission elastic member, and the second transmission elastic member 137, the brake member 132, the first brake transmission member 134, and the second brake transmission member 135 move in the reverse direction, that is, the second brake transmission member 135 moves upward, the first brake transmission member 134 moves in the direction towards the brake driving member 133, the upper side of the brake member 132 moves in the direction towards the rear wheel 14, and the lower side moves away from the rear wheel 14, so that the brake pin disengages from the brake hole 141, the brake mechanism is unlocked, the rear wheel 14 can rotate freely, and the baby stroller of the present invention can move forward.

[0062] The brake driving member can be connected to the rear foot 1 or the front foot 3 so as to be relatively movable up and down. The specific connection method for realizing the above operation function can be any well-known and feasible structure. Since it is not the invention point of the present invention, it will not be elaborated here.

[0063] When the rider 3 rotates to the forward position, the linked front wheel set switches to the positioning state, and the front wheel set is in the second angular position relative to the front foot 3. At this time, the second functional cavity 1360 in the front foot 3 is vertically aligned with the first functional cavity on the front wheel seat 31 and is vertically connected. Rotate the brake driving member 300 downward. Through the interaction between the second inclined surface 3011 and the driving inclined surface 303, the first brake transmission member 301 moves in the direction towards the second brake transmission member 135. Through the interaction between the third inclined surface 3012 of the first brake transmission member and the fourth inclined surface on the upper side of the second brake transmission member, the second brake transmission member 135 moves downward, and the lower side of the second brake member 132 extends from the second functional cavity 1360 into the first functional cavity. By contacting and interacting with the fifth inclined surface on the upper side of the brake member 132 through the fourth inclined surface on its lower side, the upper side of the brake member 132 is pushed to rotate in the direction away from the front wheel 32, so that the lower side of the brake member 132 rotates towards the side where the front wheel 32 is located. When any brake hole 321 on the hub of the front wheel 32 aligns with the brake pin on the lower side of the brake member 132, the brake pin is inserted into the brake hole, and the braking mechanism is in the braking state. The front wheel 32 is braked and cannot rotate, so the baby stroller of the present invention cannot move forward. When the brake driving member rotates to the braking mechanism being in the braking state, the opposite sides of the two first brake transmission members 301 also respectively cross the driving inclined surface 303 on the upper side of the driving portion 301 on the brake driving member and align with the clamping groove 304 of the driving portion 301. Under the action of the first transmission elastic member, the two first brake transmission members 301 will move towards each other, so that the opposite sides of the two first brake transmission members 301 will respectively insert into the clamping grooves 304 of the driving portions 301 on both sides of the brake driving member. Thus, the brake driving member 300 is also in the positioning state and cannot rotate up and down. Because the distance that the two first brake transmission members 3011 move towards each other and insert into the corresponding clamping grooves 304 is relatively short, basically only the ends of the first brake transmission members are inserted into the clamping grooves 304. Thus, even if the second brake transmission member 134 also moves upward a certain distance due to the movement of the first brake transmission member 3011, the brake pin still remains in the state of being inserted into the brake hole 321, that is, the braking mechanism is still in the braking state.

[0064] When the brake mechanism is to be unlocked, rotate the brake driving member upward. The first brake transmission member 301 is pushed by the inclined surface of the top wall of the positioning slot 304 to move in the direction towards the second brake transmission member 135. After the first brake transmission member moves out of the positioning slot 304, under the action of the first elastic member, the two first brake transmission members 301 move relatively. Under the action of the second elastic member and the third elastic member, the brake member 132, the first brake transmission member and the second brake transmission member move in the reverse direction, that is, the second brake transmission member moves upward, the upper side of the brake member 132 moves towards the direction where the front wheel 32 is located, and the lower side moves away from the front wheel 32. As a result, the brake pin disengages from the brake hole, the brake mechanism is unlocked, and the front wheel 32 can rotate freely, and the baby stroller of the present invention can move forward.

[0065] Since the caregiver generally pushes the baby stroller forward by pushing the stroller body 3, and the brake mechanism and the brake unlocking device are provided at both the front and the back of the baby stroller of the present invention. When the stroller body 3 is in the backward position, the caregiver stands on one side of the rear wheel 14, and the second functional cavity in the rear foot 1 is vertically aligned and communicated with the first functional cavity on the corresponding side wheel seat; when the stroller body 3 is in the forward position, the caregiver stands on one side of the front wheel 32, and the second functional cavity in the front foot 3 is vertically aligned and communicated with the first functional cavity on the corresponding side wheel seat. Thus, regardless of whether the stroller body 3 is in the forward position or the backward position, the brake mechanism on the side of the operator is exactly in a state where it can cooperate with the corresponding brake driving device. Therefore, the brake can be applied as long as the brake driving device is operated, without the need to additionally operate to rotate the front wheel set / rear wheel set to a state where they can cooperate. In this way, the brake operation is particularly convenient.

[0066] A front wheel orientation mechanism and a rear wheel orientation mechanism for restricting the relative horizontal rotation of the corresponding two are respectively provided between the front foot 3 and the front wheel set and between the rear foot 1 and the rear wheel set, that is, a front wheel orientation mechanism for restricting the relative horizontal rotation of the corresponding two is provided between the front foot 3 and the front wheel set, and a rear wheel orientation mechanism for restricting the relative horizontal rotation of the two is provided between the rear foot 1 and the rear wheel set; when the stroller body rotates to the backward position, the rear wheel orientation mechanism can be linked to be switched to the locked state, and the front wheel orientation mechanism is linked to be switched to the unlocked state, so that the rear wheel set is in the oriented state and the rear wheel set cannot rotate horizontally relative to the rear foot, and the front wheel can rotate horizontally relative to the front foot; when the stroller body rotates to the forward position, the front wheel orientation mechanism is linked to be switched to the locked state, and the rear wheel orientation mechanism is linked to be switched to the unlocked state, so that the front wheel set is in the oriented state and the front wheel set cannot rotate horizontally relative to the front foot, and the rear wheel set can rotate horizontally relative to the rear foot 1.

[0067] 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 relatively movable up and down, and a first engaging portion provided on the front wheel seat 31 and capable of cooperating with the front wheel orientation member 33. There is a sixth elastic member 37 between the front wheel orientation member 33 and the front foot 3 that can drive the front wheel orientation member 33 to move downward. When the front wheel orientation member 33 moves downward and cooperates with the first engaging portion, the front wheel orientation mechanism is in a locked state, and the front wheel set cannot rotate horizontally relative to the front foot 3. When the front wheel orientation member 33 disengages from the first engaging portion, the front wheel orientation mechanism is unlocked, and the front wheel set can rotate horizontally relative to the front foot 3.

[0068] In this embodiment, the first engaging portion is an upwardly opening first orientation hole 311 provided on the front wheel seat 31 (as Figure 4 , 5 shown). The orientation hole 311 is the first engaging portion. 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.

[0069] 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 relatively movable up and down, and a second engaging portion provided on the rear wheel set and capable of cooperating with the rear wheel orientation member 15. The lower side of the seventh connecting member is connected to the rear wheel orientation member 15, and there is an eighth elastic member 19 between the rear wheel orientation member 15 and the rear foot 1 that can drive the rear wheel orientation member 15 to move downward. When the rear wheel orientation member 15 moves downward and cooperates with the second engaging portion, the rear wheel orientation mechanism is in a locked state, and the rear wheel set cannot rotate horizontally relative to the front foot 3. When the rear wheel orientation member 15 moves upward and disengages from the second engaging portion, the rear wheel orientation mechanism is unlocked, and the rear wheel set can rotate horizontally relative to the rear foot 1.

[0070] The second engaging portion is an upwardly opening second orientation hole 131 provided on the rear wheel seat 13, and the second orientation hole 131 is set as the second engaging portion. When the lower side of the rear wheel orientation member 15 extends into the second orientation hole 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 Figure 4 , 5 , 6 shown). When the rear wheel orientation member 15 moves upward and disengages from the second orientation hole 131, the rear wheel orientation mechanism is unlocked, and the rear wheel seat 13 can rotate horizontally relative to the rear foot 1.

[0071] The lower side of the rear foot 1 is provided with a receiving hole 100 which opens downwards, and the upper side of the rear wheel orientation member 15 can be relatively moved up and down in the receiving hole 100. Specifically, the receiving hole 100 is provided in the receiving seat 136, and the eighth elastic member 19 is placed between the top wall of the receiving cavity 137 and the rear wheel orientation member 15. Similarly, the front foot 3 and the front wheel orientation member 33 and the sixth elastic member 37 can also adopt this setting. The front foot and the rear foot adopt the design of connecting the receiving seat in the receiving cavity, which is more convenient for assembling the rear wheel orientation member 15, the eighth elastic member 19, the front wheel orientation member 33, the sixth elastic member 37, the second brake transmission member and the second elastic.

[0072] Combination Figures 16 to 22 As shown, in this embodiment, the driver 2 is connected to a working member 8 that can rotate with the driver 2, 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 working member 8; the working 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 working member 8. During the rotation and reversing process of the driver 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 driver changes, they are changed to an unlocked state, and if they are in an unlocked state before the driver changes, they are changed to a locked state, thereby changing the state of whether the front wheel group and the rear wheel group can rotate horizontally.

[0073] When the rider 2 rotates to a rearward position, the rear wheel orientation mechanism can be linked to a locked state through a rear wheel linkage device, and the front wheel orientation mechanism can be linked to an unlocked state through a front wheel linkage device, so that the rear wheel group cannot rotate horizontally relative to the rear foot 1, and the front wheel group can rotate horizontally relative to the front foot 3; when the rider 2 rotates to a forward position, the rear wheel orientation mechanism can be linked to an unlocked state through a rear wheel linkage device, and the front wheel orientation mechanism can be linked to a locked state through a front wheel linkage device, so that the rear wheel group can rotate horizontally relative to the rear foot 1, and the front wheel group cannot rotate horizontally relative to the front foot 3.

[0074] The front wheel linkage device includes a front wheel driving member 34 that can move relative to the front foot and / or the rear foot 1, a fifth elastic member 35 arranged between the front wheel driving member 34 and the front foot 3 and capable of driving the rear front wheel driving member 34 to move toward the direction of the action member 8, and a fourth connecting member 36 connected to the front wheel driving member 34 on the upper side, the fourth connecting member 36 is connected to the front wheel directing member 33 on the lower side, and the front wheel driving member 34 is in contact with the outer surface of the cam-shaped body 81.

[0075] The rear-wheel linkage device includes a rear-wheel driving member 16 that can move up and down relative to the rear foot 1, a seventh elastic member 17 disposed between the rear-wheel driving member 16 and the rear foot 1 and capable of driving the rear-wheel driving member 16 to move toward the acting member 8, and a fifth connecting member 18 connected to the upper side of the rear-wheel driving member 16. The lower side of the fifth connecting member 18 is connected to a rear-wheel orientation member 15; the rear-wheel driving member 16 contacts the outer surface of the cam-shaped body 81.

[0076] Under the action of the fifth elastic member 35 and the seventh elastic member 17, the front-wheel driving member 34 and the rear-wheel driving member 16 are always in contact with 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 driving member 34 and the rear-wheel driving member 16 rotate and change, and the front-wheel driving member 34 and the rear-wheel driving member 16 move.

[0077] 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 16 to 18 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 acting member cam-shaped body 81, 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.

[0078] 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 away from the corresponding front wheel or rear wheel, thereby pulling the corresponding fourth connecting member or fifth connecting member to 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 toward the corresponding front wheel or rear wheel, 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.

[0079] 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 19 , 20 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.

[0080] 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.

[0081] 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.

[0082] Further, such asFigure 21 , 22 As shown, the cam-shaped body 81, the front-wheel linkage device, the rear-wheel linkage device, the front-wheel orientation mechanism, and the rear-wheel orientation mechanism are arranged such that during the folding process of the baby stroller of the present invention, the front-wheel orientation mechanism and the rear-wheel orientation mechanism always remain in the state when the rider 2 is in the rear-facing position, that is, the rear-wheel group always remains in a state where it cannot rotate horizontally relative to the rear foot 1, and the front-wheel group seat 31 can rotate horizontally relative to the front foot 3. During the folding process of the baby stroller, the rider rotates backward from the rear-facing position.

[0083] 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 in 810 in Figure 26 ), and the non-base circle portions of the first cam 811 and the second cam 812 that extend forward from the overlapping base circle portions also overlap left and right (as shown in 8100 in Figure 26 ), the portion of the first cam 811 that extends backward from the overlapping base circle portion is a non-base circle (as shown in 8101 in Figure 26 ), the portion of the second cam 812 that extends backward 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 rider 3 is in the rear-facing 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 ).

[0084] As shown in Figure 21 , 22As shown in the figure, because of the above settings, when the stroller of the present invention is folded, as the rider 2 and the actuating member 8 rotate backward from the rearward position, the change in the contact surface between the actuating member body 81 and the front wheel actuating member 34 is only the rotation change of the specific position of 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 actuating member 34 facing the actuating member 8 also moves to the side of the non-base circle part of the second cam 812. In this way, the front wheel actuating member 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. And the change in the contact surface between the actuating member body 81 and the rear wheel actuating member 16 is also only the rotation change of the specific position of the outer surface of the non-base circle part of the first cam 811. Therefore, the rear wheel actuating member 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.

[0085] 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.

[0086] A receiving cavity 10 is provided on the rear foot 1, and the body 81 of the actuating member 8 is placed in the receiving cavity 10. The sides of the front wheel actuating member 34 and the rear wheel actuating member 16 facing the actuating member 8 extend into the receiving cavity 10 and contact the outer surface of the cam-shaped body 81.

[0087] In this embodiment, a first chute and a second chute (not shown in the figure) are provided in the rear foot 1, one end of which communicates with the receiving cavity 10. The first chute and the second chute are respectively for the front wheel actuating member 16 and the rear wheel actuating member 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 actuating member 16 and the rear wheel actuating member 34, then fixedly connect the cover plate 12 to the rear foot 1.

[0088] The front wheel actuating member 34 includes a first section 341 and a second section 342 extending from the first section 341 toward the actuating member 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 be further ensured that the second section 342 only contacts the outer surface of the second cam 812.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] The first assembly part 222 is provided on the side of the rider facing the action member 8, and the action member 8 is also provided with a matching platform 83 on the side of the main body facing the rider. One of the first assembly part 222 and the matching platform 8 has a matching square hole recessed on the side facing the other, and the other is set in a square shape, and the other extends into the matching square hole. In this embodiment, the first assembly part 222 is provided on the side of the rider facing the action member 8, and the first assembly part 222 has a matching square hole recessed on the side facing the action member 8; correspondingly, the action member 8 is also provided with a square matching platform 83 on the side of the main body 81 facing the rider 2, and the square matching platform 83 extends into the matching square hole 223. In this way, when the rider 2 rotates, the limiter can rotate synchronously with the rider 2.

[0095] Preferably, a limiting groove 224 is provided on the inner wall of the matching square hole 223, and a corresponding limiting protrusion 831 is provided on the outer wall of the square matching platform 83, and the limiting protrusion 831 extends into the limiting groove 224. Such a configuration not only enables the rotation of the driver 2 to drive the action member 8 more synchronously when the driver 2 rotates, but also facilitates the assembly and positioning of the driver 2 and the action member 8.

[0096] Furthermore, the action member 8 further includes a main body 84 extending from the second cam 812 toward 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 is convexly arranged on the outer circle of the main body 84, and the main body 84 penetrates the through hole; the square matching platform 83 extends from the main body 84 toward the rider. In this test, the diameter of the main body 84 is adapted to the diameter of the through hole, so that the action member 8 and the rider 2 can rotate more smoothly relative to the rear foot 1.

[0097] Combination Figures 23 to 27 As shown, a second locking mechanism for limiting the relative rotation between the lower side of the rider 2 and the opposite side of the rear foot 1 is provided. In this embodiment, the second locking mechanism comprises a first tooth groove 22 and a second tooth groove 12 respectively provided on the opposite side of the rider 2 and the rear foot 1, a gear 71 provided in the first tooth groove 22 and the second tooth groove 12 so as to be relatively movable left and right, and a second elastic member provided 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 is meshed with the first tooth groove 22 and the second tooth groove 12 at the same time, the second locking mechanism is in a locked state, and the rider 2 cannot rotate relative to the rear foot 1.

[0098] The second tooth groove 12 is arranged on the side of the rear foot away from the accommodating cavity, and the base circle of the through hole is arranged coaxially with the second tooth groove 12. Because 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 action member, the front wheel guide member 34, and the rear wheel guide member 16 can be avoided.

[0099] The first assembly part 222 extends from the bottom wall of the first tooth groove 22 towards the side facing the acting part. In this embodiment, the rear leg 1 protrudes from the bottom wall of the second tooth groove 12 towards the direction of the rider 2 with a hollow assembly part 121 coaxially arranged with the through hole. The through hole 11 and the hollow assembly part 121 together form an installation space 122. The side of the first assembly part 222 facing the acting part 8 extends into the installation space 122 and is connected to the square fitting platform 83. With such a setting, the assembly of the rider 1 and the acting part 8 is more stable, and the interference with the gear 71 can be completely avoided. The main body 84 and the square fitting platform 83 extend into the installation space 122, and the side of the first assembly part 222 facing the acting part 8 also extends into the installation space 122 and is connected to the square fitting platform 83.

[0100] The acting part 8 is also provided with a connection hole 80 coaxially arranged with the base circle and penetrating through. During assembly, the square fitting platform 83 extends into the fitting square hole 223 of the first assembly 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 together, and the rider 2 and the acting part 8 can rotate synchronously relative to the rear leg.

[0101] Combined Figures 18 to 20 As shown, a second unlocking device for unlocking the second locking mechanism is arranged 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. Matching active and driven parts 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 direction of the gear 71 while rotating.

[0102] In this embodiment, the active part and the driven part are respectively a convex platform 221 and a concave groove 731 arranged on the opposite sides of the bottom wall of the first tooth groove 22 and the second driving part 73. Matching active inclined surfaces 2211 and driven inclined surfaces 7311 are respectively arranged on the convex platform 221 and in the concave groove 731.

[0103] The gear 71 is movably left and right around the periphery of the hollow assembly part 121, the second driving part 73 is wound around the periphery of the first assembly part 222, and the convex platform 221 is surrounded by the first assembly part 222, so that they do not interfere with each other. In other embodiments, the hollow assembly 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.

[0104] The second unlocking device further includes a second driving group 76 movably connected to the rider 2, and the second driving group 76 is connected to the second driving member 73. Driving the second driving group 76 to move, pulling the second driving member 73 to rotate. 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 simultaneously moves in the direction of the gear 71, thereby pushing 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 rear 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. 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, thereby pulling the third driving member 74 to move downward through the third connecting member 77.

[0105] In this embodiment, the second driving group 76 is arranged as an unlocking member that can be connected to the rider 2 in a relatively vertically movable manner. Moving the unlocking member 76 upward can pull the third driving member 74 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, and the connection between the second driving group 76 and the second driving member 73 can also be any well-known and feasible structure. Since it is not the focus of the present invention, it will not be elaborated here.

[0106] When the rider 2 in the rearward position needs to be rotated to the forward position, the second locking mechanism is unlocked by the second driving device, and then the rider 2 is rotated forward. The acting member 8 rotates together with the rider 2. 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.

[0107] Similarly, when the rider 2 in the forward position needs to be rotated to the rearward position, the second locking mechanism is still unlocked by the second driving device, and then the rider is rotated backward to the rearward position.

[0108] The child stroller further comprises a connecting tube 45, the lower side of which is also pivotally connected to the rear leg 1. Preferably, the lower side of the connecting tube 45 is pivotally connected to the rear leg 1 around the first rotation axis, and the lower side of the rider 2 is pivotally connected to the rear leg 1 around the second rotation axis, and the first rotation axis is arranged in parallel with the second rotation axis, or the first rotation axis and the second rotation axis are the same rotation axis, or the first rotation axis and the second rotation axis are on the same straight line. In this way, during the folding process of the child stroller of the present invention, the rider 2 and the connecting tube 45 can rotate at the same angle, so that the folding operation is smoother.

[0109] In this embodiment, the lower side of the rider 2 is located on the side of the action member 8 away from the rider 2, and the lower side of the connecting tube 45, the action member 8, the rear foot 1, and the rider 2 are coaxially arranged through the rotating shaft 120. In this way, assembly is more convenient and the overall structure is more compact.

[0110] The child stroller also includes a linkage folding device arranged between the rear foot 1, the front foot 3, and the connecting tube 45. The linkage folding device is configured so that when the rider 2 rotates backward and downward from the rear position, the linkage folding device can drive the front foot 3 and the rear foot 1 to rotate relative to each other.

[0111] In this embodiment, the linkage folding device includes a first linkage member 41, a second linkage member 42, and a third linkage member 5. The front side of the first linkage member 41 is pivoted to the front foot 3, and the rear side of the second linkage member 42 is pivoted to the rear foot 1. The upper side of the third linkage member 5 is pivoted to the connecting tube 45, and the lower side is coaxially pivoted to the rear side of the first linkage member 41 and the front side of the second linkage member 42, or two of them are pivoted, and the third is pivoted to any one of the two.

[0112] When the stroller of the present invention is in the unfolded state, the pivotal position between the upper side of the third linkage member 5 and the connecting tube 45 is located on the upper side of the pivotal position between the connecting tube 45 and the rear leg 1; the pivotal position between the front side of the first linkage member 41 and the front leg 3 is located on the lower side of the pivotal position between the front leg 3 and the rear leg 1; the pivotal position between the rear side of the second linkage member 42 and the rear leg 1 is located on the lower side of the pivotal position between the rear leg 1 and the rider 2 or / and the front leg 3.

[0113] In this embodiment, the first linking member 41 is a front seat portion of a seat, and the second linking member 42 is a rear seat portion of the seat, that is, the first linking member 41 and the second linking member 42 are both part of the seat portion of a seat. Figure 28 As shown in FIG. 1 , the first linkage member 41-1 can be set as a seat portion of a seat, that is, the first linkage member 41 is a seat portion of a seat. The connecting pipe 45 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 seat portion of the seat. The connection method of the seat fabric, the connecting pipe, and the seat can be any known and feasible structure, which is not the invention point of the present invention and will not be described here.

[0114] The first linkage member 41 and the second linkage member 42 together form a seating portion of a chair for supporting a child to sit. Therefore, when the stroller of the present invention is folded, the seat is folded together, making the overall folding operation simpler and more convenient.

[0115] Those skilled in the art should understand that the above terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. In the above description, the front is where the front wheels are located, the rear is where the rear wheels are located, the upper is where the rider is located, the lower is where the front and rear wheels are located, and the rider and the seat backrest tube are respectively located on the left and right sides of the rear legs. 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 viewing angle changes, the above orientation or positional relationship will also change accordingly. Therefore, it should not be construed as a limitation of the present invention.

Claims

1. A baby stroller with convenient braking, which includes rear legs, a stroller body, and front legs pivotally connected to the rear legs at the rear side. The lower side of the stroller body is pivotally connected to the rear legs or / and the front legs, and the stroller body is arranged to be rotatable and convertible between a rearward position and a forward position; a horizontally rotatable front wheel set and a rear wheel set are respectively connected to the lower sides of the front legs and the rear legs, and it is characterized in that: When the rider rotates to the backward position, the rear wheel set is linked to switch to the directional state, and the rear wheel set is in the first angular position relative to the rear foot; when the rider rotates to the forward position, the front wheel set is linked to switch to the directional state, and the front wheel set is in the second angular position relative to the front foot; braking mechanisms are provided on both the front wheel set and the rear wheel set, and braking drive devices are provided on both the front foot and the rear foot; the braking drive device and the braking mechanism are arranged such that when the front wheel set is in the directional state and the front wheel set is in the second angular position relative to the front foot, the braking mechanism on the front wheel set is in a state where it can cooperate with the braking drive device on the front wheel, and driving the braking drive device on the front foot can make the braking mechanism in the braking state; when the rear wheel set is in the directional state and the rear wheel set is in the first angular position relative to the rear foot, the braking mechanism on the rear wheel set is in a state where it can cooperate with the braking drive device on the rear foot, and driving the braking drive device on the rear foot can make the braking mechanism on the rear wheel set in the braking state.

2. The child stroller with convenient braking according to claim 1, wherein: The front wheel set includes a front wheel seat rotatably connected to the front foot relative to the horizontal and a front wheel connected to the front wheel seat, and the rear wheel set includes a rear wheel seat rotatably connected to the rear foot relative to the horizontal and a rear wheel connected to the rear wheel seat; the braking mechanism on the front wheel set or the rear wheel set includes a braking hole provided on the front wheel or the rear wheel, a first functional cavity with an upward opening provided on the front wheel seat or the rear wheel seat, a braking member movably connected in the first functional cavity, a braking elastic member provided between the braking member and the front wheel seat or the rear wheel seat, and a braking pin provided on the lower side of the braking member on the side facing the front wheel or the rear wheel; a through hole is provided on the side wall of the first functional cavity facing the front wheel or the rear wheel, and under the action of the braking elastic member, the braking member moves relative to the front wheel seat or the rear wheel seat, and the braking pin disengages from the braking hole; driving the upper side of the braking member to move it relative to the front wheel seat or the rear wheel seat can link the braking pin on the lower side of the braking member to pass through the through hole and extend into the braking hole for braking.

3. The child stroller with convenient braking according to claim 2, wherein: When the rider is in the backward position, the first functional cavity on the rear wheel seat is vertically opposite to the lower side of the braking drive device on the rear foot, so that the braking drive device can be driven to extend downward into the first accommodation cavity to drive the upper side of the braking member to move relative to the rear wheel seat for braking; When the rider is in the forward position, the first functional cavity on the front wheel seat is vertically opposite to the lower side of the braking drive device on the front foot, so that the braking drive device can be driven to extend downward into the first accommodation cavity to drive the upper side of the braking member to move relative to the front wheel seat, thereby achieving braking.

4. The baby stroller with convenient braking according to claim 3, wherein: The braking device on the front foot or the rear foot includes a braking drive member movably connected to the front foot or the rear foot, a first braking transmission member connected to the front foot or the rear foot so as to be movable relatively left and right, and a second braking transmission member connected to the front foot or the rear foot so as to be movable relatively up and down. The opposite side of the braking drive member is arranged in cooperation with the first braking transmission member, and the upper side of the second braking transmission member is arranged in cooperation with the side of the first braking transmission member facing away from the braking drive member; only when the rear wheel set is in the first angular position relative to the rear foot, the lower side of the second braking transmission member of the braking device on the rear foot faces the first functional cavity of the rear wheel seat; only when the front wheel set is in the second angular position relative to the front foot, the lower side of the second braking transmission member of the braking device on the front foot faces the first functional cavity of the front wheel seat.

5. The child stroller with convenient braking according to claim 4, characterized in that: The braking drive member is connected to the front foot or the rear foot so as to be movable relatively up and down or relatively up and down rotationally; preferably, when the braking drive member is arranged to be connected to the front foot or the rear foot so as to be movable relatively up and down rotationally, an arc-shaped driving portion is arranged on one side of the braking drive member, the upper end surface of the driving portion is arranged as a driving inclined surface, a second inclined surface matched with the driving inclined surface is arranged on the side of the first braking transmission member facing away from the second braking transmission member, and the driving portion is designed in an arc shape, so that when the braking drive member rotates downward, before the braking mechanism brakes, the second inclined surface always remains in a state of leaning against the driving inclined surface; preferably, a clamping groove is arranged at one end of the driving portion facing the second braking transmission member, and the top wall of the clamping groove is also arranged as an inclined surface; the clamping groove is arranged such that when the braking mechanism is in a braking state, the end of the first braking transmission member facing away from the second braking transmission member is inserted into the clamping groove.

6. The child stroller with convenient braking according to claim 4 or 5, characterized in that: A first transmission elastic member for driving the first braking transmission member to move toward the braking drive member is arranged between the front foot, the rear foot and the first braking transmission member connected thereto; preferably, a second transmission elastic member for driving the second braking transmission member to move upward is arranged between the front foot, the rear foot and the second braking transmission member connected thereto; preferably, a receiving cavity with an opening downward is arranged on the lower side of each of the front foot and the rear foot, a receiving seat is connected in the receiving cavity, a second functional cavity with an opening downward is arranged in the receiving seat, and the second braking transmission member is connected to the second functional cavity so as to be movable relatively up and down; only when the front wheel set is in the second angular position relative to the front foot, the second functional cavity on the front foot is vertically communicated with the first functional cavity of the front wheel seat; when the rear wheel set is in the second angular position relative to the rear foot, the second functional cavity on the rear foot is vertically communicated with the first functional cavity of the rear wheel set seat; first notches and second notches are respectively arranged on the cavity walls of the second functional cavity and the receiving cavity at positions facing the first braking transmission member.

7. The child stroller with convenient braking according to any one of claims 1 to 6, characterized in that: A front wheel orientation mechanism and a rear wheel orientation mechanism for restricting relative horizontal rotation between the corresponding two are respectively provided between the front feet and the front wheel set and between the rear feet and the rear wheel set; when the rider rotates to the backward position, the rear wheel orientation mechanism can be linked to switch to the locked state, and the front wheel orientation mechanism is linked to switch to the unlocked state; when the rider rotates to the forward position, the front wheel orientation mechanism is linked to switch to the locked state, and the rear wheel orientation mechanism is linked to switch to the unlocked state; preferably, the front wheel orientation mechanism includes a front wheel orientation member connected to the lower side of the front foot so as to be relatively movable up and down, and a first engaging portion provided on the front wheel seat and capable of cooperating with the front wheel orientation member, and a sixth elastic member for driving the front wheel orientation member to move downward is provided between the front wheel orientation member and the front foot; when the front wheel orientation member moves downward to cooperate with the first engaging portion, the front wheel orientation mechanism is in the locked state; when the front wheel orientation member is disengaged from the first engaging portion, the front wheel orientation mechanism is unlocked; preferably, the rear wheel orientation mechanism includes a rear wheel orientation member connected to the lower side of the rear foot so as to be relatively movable up and down, and a second engaging portion provided on the rear wheel set and capable of cooperating with the rear wheel orientation member, and an eighth elastic member for driving the rear wheel orientation member to move downward is provided between the rear wheel orientation member and the rear foot; when the rear wheel orientation member moves downward to cooperate with the second engaging portion, the rear wheel orientation mechanism is in the locked state; when the rear wheel orientation member moves upward to be disengaged from the second engaging portion, the rear wheel orientation mechanism is unlocked; preferably, a receiving hole opening downward is provided in the receiving seat, and the upper sides of the rear wheel orientation member and the front wheel orientation member are respectively disposed in the corresponding receiving holes so as to be relatively movable up and down.

8. The child stroller with convenient braking according to claim 7, wherein: A working member rotatable together with the rider is connected to the lower side of the rider; a front wheel linkage device and a rear wheel linkage device are respectively provided between the front wheel orientation mechanism, the rear wheel orientation mechanism and the working member; the working member includes a body, and the body is arranged in a cam shape, and the outer surfaces of the front wheel linkage device and the rear wheel linkage device facing the working member are both in contact with the outer surface of the cam-shaped body; during the rotation and direction change 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 rotate and change, so as to link and change the unlocked state or the locked state of the front wheel orientation mechanism and the rear wheel orientation mechanism.

9. The child stroller with convenient braking according to claim 8, wherein: When the rider rotates to the backward position, the rear wheel orientation mechanism is linked to switch to the locked state through the rear wheel linkage device, and the front wheel orientation mechanism is in the unlocked state through the front wheel linkage device; when the rider rotates to the forward position, the rear wheel orientation mechanism is in the unlocked state through the rear wheel linkage device, and the front wheel orientation mechanism is in the locked state through the front wheel linkage device; preferably, the cam-shaped body, the front wheel linkage device, the rear wheel linkage device, the rear wheel linkage device and the front wheel linkage device are arranged such that during the folding process of the baby stroller, the rear wheel orientation mechanism remains in the locked state and the front wheel orientation mechanism remains in the unlocked state.

10. The child stroller with convenient braking according to claim 8 or 9, characterized in that: The radius of the base circle of the cam-shaped body is less 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 the backward 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 the 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.

11. The child stroller with convenient braking according to any one of claims 6 to 10, characterized in that: The front-wheel linkage device includes a front-wheel actuator that can move relative to the front foot or / and the rear foot, a fifth elastic member disposed between the front-wheel actuator and the front foot and capable of driving the front-wheel actuator to move toward the actuator direction, a fourth connecting member connected to the upper side of the front-wheel actuator, and a front-wheel orienting member connected to the lower side of the fourth connecting member. The front-wheel actuator contacts the outer surface of the cam-shaped body; preferably, the rear-wheel linkage device includes a rear-wheel actuator that can move up and down relative to the rear foot, a seventh elastic member disposed between the rear-wheel actuator and the rear foot and capable of driving the rear-wheel actuator to move toward the actuator direction, a fifth connecting member connected to the upper side of the rear-wheel actuator, and a rear-wheel orienting member connected to the lower side of the fourth connecting member; the rear-wheel actuator contacts the outer surface of the cam-shaped body; preferably, when the contact position of the front-wheel actuator or the rear-wheel actuator with the outer surface of the body rotates from the outer surface of the non-base circle to the outer surface of the base circle, the front-wheel actuator or the rear-wheel actuator moves away from the corresponding front wheel or rear wheel, thereby pulling the corresponding fourth connecting member or fifth connecting member to unlock the corresponding front-wheel orienting mechanism or rear-wheel orienting mechanism; when the contact position of the front-wheel actuator or the rear-wheel actuator with the outer surface of the body rotates from the outer surface of the base circle to the outer surface of the non-base circle, the front-wheel actuator or the rear-wheel actuator moves toward the corresponding front wheel or rear wheel, thereby releasing the pulling force on the corresponding fourth connecting member or fifth connecting member, and the corresponding front-wheel orienting mechanism or rear-wheel orienting mechanism can be in a locked state.

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