Baby carriage

Abstract

The invention discloses a baby carriage which comprises a carriage frame and a seat connected with the carriage frame. The frame comprises an upper support, a front support and a rear support, the rear side of the front support, the front side of the rear support and the lower side of the upper support are coaxially pivoted or two of the front support, the front side of the rear support and the lower side of the upper support are pivoted, the third support is pivoted with any one of the two of the front support and the rear support, the seat comprises a backrest, and the lower side of the backrest is pivoted to the rear support. A locking mechanism for limiting relative rotation of the backrest and the rear bracket is arranged between the backrest and the rear bracket; the baby carriage further comprises a first unlocking device movably connected to the rear support, the upper side of the first unlocking device is matched with the upper support, and the lower side of the first unlocking device is matched with the locking mechanism. When the baby carriage is folded, the rotating upper support can drive the first unlocking device to move relative to the rear support to unlock the locking mechanism in a linkage mode, the locking mechanism does not need to be additionally and independently unlocked to fold the backrest, and therefore folding operation of the baby carriage is very easy and convenient.

Description

Technical Field

[0001] The present invention relates to the field of infant products, and in particular to a baby carriage. Background Art

[0002] A baby stroller generally includes a frame and a seat connected to the frame, and the seat generally includes a backrest. To make the use more convenient, the baby stroller is configured to be switchable between an unfolded state and a folded state, so that the frame can be folded, and the backrest is generally pivotally connected to the frame or to the seat portion of the seat. However, in the traditional design, the folding operation of the frame and the unlocking operation of the backrest are two separate operations and cannot be linked, so the folding operation of the baby stroller is relatively cumbersome. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned disadvantages and to provide a baby stroller, wherein the seat backrest can be unlocked in conjunction with the seat backrest when the baby stroller is folded, thereby making the overall folding operation of the baby stroller very simple and convenient.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A baby stroller that can be converted between an expanded state and a folded state, the baby stroller comprising a frame and a seat connected to the frame; the frame comprising an upper bracket, a front bracket, and a rear bracket, the rear side of the front bracket, the front side of the rear bracket and the lower side of the upper bracket being coaxially pivoted, or two of them being pivoted, and the third being pivoted to any one of the two, the seat comprising a backrest, the lower side of the backrest being pivoted to the rear bracket, and a locking mechanism that limits relative rotation between the backrest and the rear bracket being provided; the baby stroller also comprising a first unlocking device movably connected to the rear bracket, the upper side of the first unlocking device being provided in cooperation with the upper bracket, and the lower side being provided in cooperation with the locking mechanism; when the baby stroller is folded, the rotating upper bracket can drive the first unlocking device to move relative to the rear bracket to unlock the locking mechanism in linkage, so that the backrest can rotate relative to the rear bracket.

[0006] Because the present invention adopts the above technical solution, it has the following beneficial effects:

[0007] When folding the baby stroller, the upper bracket is rotated backward and downward to drive the first unlocking device to move relative to the rear bracket and unlock the locking mechanism in conjunction with it. That is, when the frame is folded, the locking mechanism of the seat backrest can be unlocked in conjunction with it, so there is no need to unlock the locking mechanism separately to fold the backrest. Therefore, the folding operation of the baby stroller of the present invention is very simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic diagram of the baby carriage of the present invention in an unfolded state;

[0009] Figure 2 Schematic diagram of another angle of the stroller of the present invention in the unfolded state;

[0010] Figure 3 According to Figure 2 Enlarged schematic diagram of part A;

[0011] Figure 4 According to Figure 3 Exploded enlarged schematic diagram;

[0012] Figure 5 According to Figure 3 Further exploded enlarged schematic diagram;

[0013] Figure 6 Enlarged schematic diagram of the adapter of the stroller of the present invention;

[0014] Figure 7 According to Figure 5 Schematic diagram of another angle of some components;

[0015] Figure 8 Enlarged schematic diagram of the combination of the connecting piece and the first unlocking piece moving part of the stroller of the present invention;

[0016] Figure 9 Enlarged schematic diagram of another angle of the combination of the connecting piece and the first unlocking piece moving part of the stroller of the present invention;

[0017] Figure 10 According to Figure 3 Enlarged sectional schematic diagram in the B-B direction;

[0018] Figure 11 Enlarged schematic diagram of the driving part of the stroller of the present invention;

[0019] Figure 12 Exploded enlarged schematic diagram of the lower side of the backrest, the locking piece and the connecting piece in another embodiment;

[0020] Figure 13 According to Figure 12 Enlarged schematic diagram of another angle;

[0021] Figure 14 According to Figure 12 Enlarged schematic diagram of another angle of the locking piece;

[0022] Figure 15 Enlarged schematic diagram of one embodiment of the locking piece of the present invention;

[0023] Figure 16 Schematic diagram of the stroller of the present invention after being folded;

[0024] Figure 17 Schematic diagram of the stroller of the present invention when the push handle is in the backward position. Detailed implementation manner

[0025] As Figures 1 to 10 shown, the present invention discloses a baby stroller that can be switched between an unfolded state and a folded state. The baby stroller includes a frame and a seat connected to the frame. The frame includes a rear bracket 1, a front bracket 6, and an upper bracket 2. The rear side of the front bracket 6, the front side of the rear bracket 1, and the lower side of the upper bracket 2 are coaxially pivotally connected, or two of them are pivotally connected, and the third is pivotally connected to any one of the two. The seat includes a backrest 3. The lower side of the backrest 3 is pivotally connected to the rear bracket 1, and a locking mechanism for restricting relative rotation between the backrest 3 and the rear bracket 1 is provided therebetween. The baby stroller further includes a first unlocking device movably connected to the rear bracket 1. The upper side of the first unlocking device is cooperatively arranged with the upper bracket 2, and the lower side is cooperatively arranged with the locking mechanism. When folding the baby stroller, the rotating upper bracket 2 can drive the first unlocking device to move relative to the rear bracket 1 to unlock the locking mechanism in linkage, so that the backrest 3 can rotate relative to the rear bracket 1.

[0026] The first unlocking device includes a first unlocking member 41 that is connected to the rear bracket 1 so as to be relatively movable up and down. The upper side of the first unlocking member 41 is cooperatively arranged with the upper bracket 2, and the lower side is cooperatively arranged with the locking mechanism. When the upper bracket 2 rotates backward and downward, it can drive the first unlocking member 41 to move downward to unlock the locking mechanism.

[0027] A driving groove 21 is provided on one side of the upper bracket 2 facing the moving member of the first unlocking member 41. The upper side of the moving member of the first unlocking member 41 extends into the driving groove 21. At least one of the upper end surface of the moving member of the first unlocking member 41 and the groove wall of the driving groove 21 facing the first unlocking member 41 is provided with an inclined surface. In this embodiment, preferably, the upper end surface of the moving member of the first unlocking member 41 is provided with a first inclined surface 411. Correspondingly, the groove wall of the driving groove 21 facing the first inclined surface 411 is provided with a second inclined surface 211 that cooperates with the first inclined surface. When the baby stroller of the present invention is in the unfolded state, under the action of the first elastic member 43, the upper side of the moving member of the first unlocking member 41 extends into the driving groove 21, and the first inclined surface 411 on the upper side of the moving member of the first unlocking member 41 contacts the second inclined surface 211 of the driving groove 21. When the upper bracket 2 rotates backward and downward, through the cooperation of the first inclined surface 411 and the second inclined surface 211, the first unlocking member 41 can be driven to move downward relative to the rear bracket 1. When only one of them is provided with an inclined surface, that is, only the first inclined surface or the second inclined surface is provided, when the upper bracket 2 rotates backward and downward, the first unlocking member 41 can also be driven to move downward relative to the rear bracket 1.

[0028] A first elastic member 43 for driving the first unlocking member to move upward is provided between the first unlocking member 41 and the rear bracket 1 (asFigure 10 As shown). Thus, when the driving groove 21 is aligned with the upper side of the moving member of the first unlocking member 41, under the action of the first elastic member 43, the moving member of the first unlocking member 41 can move upward relatively and its upper side extends into the driving groove 21. With such a setting, when the stroller in the folded state is converted to the unfolded state, under the action of the first elastic member 43, the moving member of the first unlocking member 41 can automatically reset, thus facilitating the subsequent folding operation.

[0029] Combined with Figure 7 、 9 As shown in FIGS. 8 and 10, in this embodiment, the first elastic member 43 is also set as a compression spring. A first long hole 412 extending vertically is provided in the first unlocking member 41. The rear bracket 1 protrudes with a abutting member 11, and the abutting member 11 extends into the first long hole 412. The upper side of the first elastic member 43 is connected to the top wall of the first long hole 412, and the lower side is connected to the abutting member 11. To prevent the first elastic member 43 from shifting easily, corresponding spring seats 4121 and 111 are respectively provided on the top wall of the first long hole 412 and the abutting member 11. The upper side of the first elastic member 43 is sleeved outside the spring seat 4121 on the top wall of the first long hole, and the lower side is sleeved outside the spring seat 111 of the abutting member 11. When folding, the downward movement of the moving member of the first unlocking member 41 will compress the first elastic member 43.

[0030] In other embodiments, the first elastic member 43 can also be set as other known and feasible elastic members. When set as other elastic members, the relevant settings will change accordingly.

[0031] A first connecting seat 12 is provided on the rear bracket 1, and a second connecting seat 31 is provided at the lower end of the backrest 3. The first connecting seat 12 and the second connecting seat 31 are pivotally connected, so as to achieve the purpose of pivotally connecting the backrest 3 and the rear bracket 1.

[0032] A first receiving groove 121 is provided on one side of the first connecting seat 12 facing the second connecting seat 31. The lower side of the first unlocking member 41 extends into the first receiving groove 121 and is cooperatively arranged with the locking mechanism.

[0033] In this embodiment, preferably, a second long hole 414 is provided on the lower side of the first unlocking member 41. A connecting shaft (not shown in the figure) passes through the first connecting seat 12, the second long hole 414, and the second connecting seat 31 to connect the three. Further, a third long hole 415 is also provided on the upper side of the first unlocking member 41. Another connecting shaft passes through the third long hole 415 and the rear bracket 1 to connect the first unlocking member 41 and the rear bracket 1. In this way, through the connection provided in these two places, it can be ensured that the first unlocking member 41 moves smoothly up and down and is not easily displaced. In other embodiments, the first unlocking member 41 can also be connected to the rear bracket through a connecting shaft at any other suitable position to be relatively movable up and down.

[0034] A connecting member 13 is fixedly connected to the rear support 1. A first connecting seat 12 is arranged on the lower side of the connecting member 13. A receiving cavity is arranged between the connecting member 13 and the rear support 1. The moving member of the first unlocking member 41 can move up and down in the receiving cavity, and the upper side of the moving member of the first unlocking member 41 extends out of the upper side of the connecting member 13 to cooperate with the upper support 2. With the connecting member 13 arranged as above, the first unlocking member 41 can be covered to prevent it from being affected by external objects and affecting the linkage unlocking of the locking mechanism. During connection, in addition to connecting the first unlocking member 41 and the rear support 1, the connecting shaft also connects the connecting member 13.

[0035] The abutting member 11 can also extend from the inner wall of the connecting member 13 towards the side of the rear support 1.

[0036] In this embodiment, the locking mechanism includes a locking member 51 that is connected to the second connecting seat 31 so as to be relatively movable left and right on one side. A first locking portion 122 and a second locking portion 511 that cooperate with each other are arranged between the first connecting seat 12 and the other side of the locking member 51. When the first locking portion 122 and the second locking portion 511 cooperate, the locking member 51 and the first connecting seat 12 cannot rotate relative to each other, and the backrest 3 cannot rotate relative to the rear support 1, and the locking mechanism is in a locked state. The cooperation between the locking member 51 and the first unlocking member 41 is set such that when the first unlocking member 41 moves downward, it can drive the locking member 51 to move in a direction away from the rear support 1, so that the first locking portion 122 and the second locking portion 511 are disengaged, and the locking mechanism is unlocked, and the backrest 3 can rotate relative to the rear support 1.

[0037] The locking mechanism further includes a second elastic member 52 (as shown) arranged between the locking member 51 and the second connecting seat 31 and capable of driving the locking member 51 to move towards the rear support, so that under the action of the second elastic member 52, the locking member 51 can automatically move towards the rear support to make the first locking portion 122 and the second locking portion 511 cooperate. Figure 10 shown) so that under the action of the second elastic member 52, the locking member 51 can automatically move towards the rear support to make the first locking portion 122 and the second locking portion 511 cooperate.

[0038] Preferably, a second receiving groove 311 is arranged on the side of the second connecting seat 31 facing the first connecting seat 12. One side of the locking member 51 is placed in the second receiving groove 311 so as to be relatively movable left and right.

[0039] The second elastic member 52 can also be set as a compression spring. It is located in the second receiving groove 311, and one side abuts against the wall of the second receiving groove 311, and the other side abuts against the first unlocking member 41. Under the action of the second elastic member 52, the locking member 51 moves towards the rear support 1.

[0040] In this embodiment, the first unlocking member 41 is arranged in cooperation with the locking mechanism through an adapter 42, and the adapter 42 can be connected to the rear bracket 1 so as to be relatively movable left and right; and the adapter 42 is arranged in cooperation with the lower side of the first unlocking member 41 on one side facing the rear bracket, and is arranged in cooperation with the locking member 51 on the other side; the first unlocking member 41 moving downward can drive the adapter 42 to move in the direction toward the back-leaning, and when the adapter 42 moves in the direction toward the back-leaning, it can push the locking member 51 to move away from one side of the rear bracket 1, thereby unlocking the locking mechanism.

[0041] The adapter 42 is provided with a third inclined surface 421 on the side facing the rear support 1, and a matching fourth inclined surface 413 is provided on the lower side of the first unlocking member 41 facing the third inclined surface 421. When the first unlocking member 41 moves downward relative to the rear support 1, the adapter 42 is driven to move in the direction of the backrest (i.e., in the direction of the backrest 3) through the matching of the third inclined surface 421 and the fourth inclined surface 413.

[0042] The adapter 42 is at least partially disposed in the first receiving groove 121 so as to be relatively movable leftward and rightward, and the side of the adapter 42 facing away from the rear bracket 1 is matched with the locking member. When the adapter 42 moves toward the back, it can push the locking member 51 to move away from the side of the rear bracket 1, and further, it can push the locking member 51 to move into the second receiving groove 311, thereby unlocking the locking mechanism. In this embodiment, the side of the adapter 42 facing away from the rear bracket 1 is connected to the locking member.

[0043] In this embodiment, the locking member 51 is provided with a third receiving groove 513 on the side facing the rear bracket 1, and the adapter 42 extends into the third receiving groove 513 on the side facing away from the rear bracket 1 and abuts against the opposite side of the third receiving groove 513. Therefore, as long as the adapter 42 moves toward the side facing away from the rear bracket 1, the locking member 51 can be pushed to move toward the second receiving groove 311, so that the locking mechanism is unlocked faster. That is, the end face of the locking member 51 facing the rear bracket 1 is provided with a circle of second end face ratchet teeth 511, and the third receiving groove is provided in the middle.

[0044] In other embodiments, the adapter 42 may be completely located in the first receiving groove, and an extension portion (not shown) may be extended from the middle of the unlocking member 51 toward the rear bracket, and the extension portion may extend into the first receiving groove and be connected to the adapter 42, and the connection may be abutting connection, fixed connection, etc. In the above, the adapter and the locking member 51 are provided as two separate components.

[0045] In this embodiment, the first locking portion 122 and the second locking portion 511 are first end face ratchet teeth 122 and second end face ratchet teeth 511 respectively arranged on the opposite sides of the first connecting seat 12 and the locking member 51, which can mesh with each other, that is, the second end face ratchet teeth 511 are arranged on the side of the locking member 51 facing the rear bracket 1, and the first end face ratchet teeth 122 are arranged on the side of the first connecting seat 12 facing the second connecting seat 31, and the first end face ratchet teeth mesh with the second end face ratchet teeth. Under the action of the second elastic member 52, the first end face ratchet teeth 122 of the first connecting seat 12 mesh with the second end face ratchet teeth 511 of the locking member 51, the backrest 3 cannot rotate relative to the rear bracket 1, and the locking mechanism is in a locked state.

[0046] When the baby carriage of the present invention is folded, the upper bracket 2 is rotated backward and downward, and the second inclined surface 211 of the driving groove 21 pushes the first inclined surface 411, thereby driving the first unlocking member 41 to move downward relative to the rear bracket 1, so that the fourth inclined surface 413 on the lower side of the first unlocking member 41 pushes the third inclined surface 421 of the adapter 42, and then pushes the adapter 42 to move toward the side of the backrest 3, and the adapter 42 moved in this way pushes the locking member 51 to move into the second receiving groove 311, so that the second end face ratchet teeth 513 of the locking member 51 are disengaged from the second end face ratchet teeth 122 of the first connecting seat 12, that is, the first locking portion 122 is disengaged from the second locking portion 511, and the locking mechanism is unlocked, and the backrest 3 can rotate relative to the rear bracket 1. Under the action of gravity, the backrest 3 will directly rotate downward until it can no longer rotate, and at this time the backrest 3 has also rotated to the folded state. When the upper bracket 2 can no longer rotate downward, it means that the upper bracket 2 has also rotated to the folded state (such as Figure 16 That is, when the baby stroller is folded, the locking mechanism of the seat backrest 3 can be unlocked in conjunction with the seat backrest 3, and there is no need to unlock the locking mechanism separately to fold the backrest 3, so that the folding operation of the baby stroller of the present invention is very simple.

[0047] A frame locking mechanism is also provided between the upper support 2 and the rear support 1 to limit the relative rotation of the two. After unlocking the frame locking mechanism, the upper support 2 can be rotated backward and downward to fold the baby stroller of the present invention. The specific structure and unlocking method of the frame locking mechanism can be any feasible structure, which is not the inventive point of the present invention and will not be described in detail here.

[0048] The seat further includes a seating part 30, and the seating part 30 is connected to the vehicle frame. In this embodiment, the vehicle frame further includes a first linkage 71, and the upper side of the first linkage 71 is pivotally connected to the upper bracket 2; the front side of the seating part 30 is pivotally connected to the front bracket 6, the lower side of the first linkage 71 is pivotally connected to the seating part 30, and the pivotal connection position of the first linkage 71 and the seating part 30 is located at the rear side of the pivotal connection position of the seating part 30 and the front bracket 6. Preferably, the lower side of the upper bracket 2 is pivotally connected to the rear bracket 1 rotatably about a first rotating shaft, the first linkage 71 is pivotally connected to the rear bracket 1 rotatably about a second rotating shaft, and when the stroller is in the unfolded state, the second rotating shaft is located above the first rotating shaft. With such a setting, when folding the stroller, when the upper bracket 2 is rotated downward and backward, the second linkage rod is also driven to rotate downward and move, so that the rear side of the seating part 30 of the seat is driven to rotate downward and backward until the stroller is completely folded (as Figure 12 shown). That is to say, when folding the stroller, the upper bracket 2 will rotate, and the rotating upper bracket will drive the first unlocking device to move relative to the rear bracket to unlock the locking mechanism in a linkage manner.

[0049] Further, the vehicle frame further includes a second linkage 72, the rear side of the second linkage 72 is pivotally connected to the rear bracket 1, and the front side is pivotally connected to the lower side of the first linkage 71 and / or the seating part 30. Thus, when folding the stroller, as the first linkage 71 and / or the seating part 30 rotate downward and move, the front side of the second linkage 72 also rotates downward and moves until the stroller is completely folded.

[0050] As described above, when folding the stroller of the present invention, rotating the upper bracket 2 downward and backward can drive the components of the vehicle frame and the seat to rotate and move to fold, so the folding operation of the stroller of the present invention is very simple.

[0051] Preferably, the front side of the first linkage 71 and the lower side of the first linkage 71 are coaxially pivotally connected to the seating part 30, so that the assembly is simple. Further, the rear side of the first linkage 71 and the lower side of the backrest 3 are coaxially pivotally connected to the rear bracket 1, so that the assembly is more simple. In this embodiment, the rear side of the first linkage 71 is located between the first connecting seat 12 and the rear bracket 1.

[0052] In this embodiment, the adapter 42 is further arranged to be rotatable relative to the first connecting seat 12, and the opposite sides of the adapter 42 and the locking member 51 are respectively provided with a matching first engaging portion 420 and a second engaging portion 510. When the adapter 42 is rotated, under the cooperation of the first engaging portion 420 and the second engaging portion 510, the locking member 51 is driven to move towards the backrest, that is, to move into the second receiving groove 311, so that the first end face ratchet teeth are disengaged from the second end face ratchet teeth, that is, the first locking portion 122 is disengaged from the second locking portion 511, and the locking mechanism is unlocked, and the backrest 3 can rotate relative to the rear bracket 1.

[0053] Specifically, the opposite sides of the adapter 42 and the third receiving groove 513 are respectively provided with the matching first engaging portion 420 and the second engaging portion 510. One side of the adapter 42 facing the bottom wall of the third receiving groove 513 is provided with a driving groove 420, and one side wall of the driving groove 420 is provided with a fifth inclined surface 4201; the locking member 51 extends from the bottom wall of the third receiving groove 513 towards the side of the adapter 42 and is provided with a driving block 510, the driving block 510 extends into the driving groove 420, and the side surface of the driving block 510 facing the fifth inclined surface 4201 is provided with a corresponding sixth inclined surface (not shown in the figure); the driving groove 420 and the driving block 510 are respectively provided as the first engaging portion 420 and the second engaging portion 510.

[0054] In other embodiments, it may also be that the side of the locking member 51 facing the rear bracket 1 is not provided with the third receiving groove, but the first engaging portion and the second engaging portion are respectively provided on the opposite end faces of the locking member 51 and the adapter.

[0055] The backrest 3 is further provided with a second unlocking device for unlocking the locking mechanism. The second unlocking device includes an operating member 32 movably connected to the backrest 3 and a linkage structure (not shown in the figure) connected to the upper side of the operating member 32. The lower side of the linkage structure is connected to the adapter 42. Driving the operating member 32 to move relative to the backrest 3 can pull the adapter 42 to rotate through a steel wire. The linkage structure can be a steel wire.

[0056] Specifically, in this embodiment, the lower side of the steel wire penetrates into the second receiving groove 311 and then penetrates into the third receiving groove 513 to be connected to the adapter 42. The locking member 51 is provided with a through hole 514 for the lower side of the steel wire to pass through. The operating member 32 is rotatably connected to the backrest 3, and the operating member 32 can also be movably connected to the backrest 3 in other forms, as long as it can pull the adapter 42 to rotate through the steel wire when it can move relative to the backrest 3.

[0057] When the stroller is in the unfolded state and the backrest 3 angle needs to be adjusted, rotate the operating member 32, thereby pulling the upper side of the steel wire upward. In this way, the lower side of the steel wire pulls the adapter 42 to rotate. The fifth inclined surface 4201 on the adapter 42 interacts with the sixth inclined surface on the engaging member of the locking member 51, and can also drive the locking member 51 to move into the second receiving groove 311, so that the second end face ratchet teeth of the locking member 51 are disengaged from the first end face ratchet teeth of the connecting member 13, thereby unlocking the locking mechanism, and the backrest 3 can rotate relative to the rear bracket 1. At this time, the backrest 3 can be rotated forward and backward. When it is rotated to the desired angle, release the operating member 32. Under the action of the first elastic member 43, the locking member 51 moves in the direction towards the rear bracket 1, and the second end face ratchet teeth of the locking member 51 are engaged with the first end face ratchet teeth of the connecting member 13 again, thereby locking the backrest 3 at this angular position. And this operation of adjusting the backrest angle alone will not affect the first unlocking member 41.

[0058] Preferably, when the first locking portion and the second locking portion are respectively provided as the first end face ratchet teeth 122 and the second end face ratchet teeth 511, the first end face ratchet teeth 122 and the second end face ratchet teeth 511 are arranged such that when the two are engaged, the backrest 3 can be rotated forward without driving the second unlocking device to unlock the locking mechanism, while when rotating the backrest backward, it is necessary to first drive the second unlocking device to unlock the locking mechanism. In this way, the present invention makes full use of the characteristics of the end face ratchet teeth, making the operation of adjusting the backrest angle more convenient.

[0059] Preferably, a whole circle of inclined surfaces is provided on the outer circumference of the side of the adapter 42 facing the rear bracket 1, and this whole circle of inclined surfaces is set as the third inclined surface 421, so that no matter what angular position the backrest 3 is adjusted to, the surface in contact with the third inclined surface 421 on the lower side of the first unlocking member 41 is an inclined surface, that is, no matter what angular position the backrest 3 rotates to, when folding the stroller, the unlocking device can be linked to unlock the locking mechanism.

[0060] In other embodiments, it may also be that the adapter can only move relative to the rear bracket, that is, there is no need to provide the driving groove 420 and the driving block 510. Driving the operating member 32 to move relative to the backrest 3, the adapter 42 can be pulled by the steel wire to move in a direction away from the rear bracket, thereby driving the locking member to move together to unlock the locking mechanism. The steel wire is also directly connected to the locking member, and the steel wire directly pulls the locking member to move in the direction towards the backrest to unlock the locking mechanism.

[0061] Regardless of whether the above is that the steel wire pulls the adapter to rotate or directly pulls the adapter / locking member to move, the specific structure of the operating member 32, its connection manner with the backrest 3 and the steel wire, and the connection of the lower side of the steel wire with the adapter 42 / locking member can all be any well-known and feasible structures, and they are not the invention points of the present invention, so they will not be elaborated here.

[0062] Preferably, a first limiting member 14 protrudes from the rear bracket 1. A second limiting member 312 protrudes from the outer side of the second connecting seat 31 towards the rear bracket 1. When the backrest 3 rotates forward to a set angle, the first limiting member 14 abuts against the second limiting member 312, so that the backrest 3 cannot rotate forward any further. This arrangement ensures that the backrest 3 of the seat does not rotate forward beyond the set angle position, thus avoiding the accidental operation of pressing down on a child sitting on the seat when adjusting the angle of the backrest 3, further ensuring the safety of the child. The set angle can be set according to relevant safety regulations and special requirements.

[0063] Preferably, a gear tooth 515 is provided on the outer ring of the locking member 51. Correspondingly, the second receiving groove 311 is configured as a tooth groove meshing with the gear tooth. With this arrangement, when pulling the adapter 42 to rotate, the locking member 51 can only move but not rotate, thus ensuring that the locking member 51 can move to disengage the first end face ratchet teeth from the second end face ratchet teeth, that is, ensuring that the locking mechanism can be unlocked, and when the backrest rotates, the locking member can rotate together.

[0064] In this embodiment, the gear tooth 515 is provided on the outer ring of the locking member 51, and the second locking portion 511, that is, the second end face ratchet teeth, is provided at the end of the locking member 51 on the side facing the rear bracket 1 (as Figure 7 shown).

[0065] At least one limiting groove 423 is provided on the outer ring of the side of the adapter 42 facing the backrest 3 (as Figure 6 shown). Correspondingly, a third limiting member 516 is provided in the third receiving groove 513 (as Figure 7 shown). The third limiting member 516 extends into the limiting groove 423 and can rotate relative to the limiting groove 423. The limiting groove 423 and the third limiting member 516 are arranged such that during the rotation of the adapter 42, the fifth inclined surface 4201 and the sixth inclined surface always remain in a state of at least partial contact with each other. This arrangement can prevent the adapter 42 from rotating without limit, resulting in the complete separation of the driving block 510 from the driving groove 420, that is, ensuring that the fifth inclined surface 4201 and the sixth inclined surface will not be completely separated from contact. In this way, after releasing the operating member 32, under the action of the second elastic member 52, the adapter 42 can also be reset.

[0066] Based on another implementation of the above embodiment (not shown), the adapter can also be configured to be immovable relative to the first connection seat and the second connection seat, but rotatable relative to the first connection seat, that is, the adapter can be connected to the first connection seat in a relatively rotatable manner. The adapter and the first unlocking member are configured to cooperate with each other so that when the first unlocking member moves downward, the adapter can be driven to rotate. Through the cooperation of the first matching portion 420 and the second matching portion 510 respectively arranged on the opposite sides of the adapter and the locking member, the locking member is driven to move in the direction of back-to-back, so that the first locking portion and the second locking portion are disengaged, thereby unlocking the locking mechanism.

[0067] In this embodiment, the arrangement principle of the first locking part and the second locking part, the first matching part and the second matching part is the same as the above embodiment, so it is not repeated here. The connection method of the first unlocking member and the adapter member can be any known and feasible method, and it is not the inventive point of the present invention, so it is not repeated here.

[0068] Preferably, in this embodiment, a torsion spring may be provided between the adapter and the first connecting seat to facilitate resetting of the adapter.

[0069] The lower side of the steel wire is also connected to the adapter, which can pull the adapter to rotate and drive the locking member to move to unlock the locking mechanism.

[0070] In this embodiment, the lower side of the upper bracket 2 is pivotally connected to the rear bracket 1 , so as to facilitate its cooperation with the first unlocking device. The front bracket 6 is also pivotally connected to the rear bracket 1 .

[0071] In other embodiments, the front side of the rear support 1 may be pivotally connected to the rear side of the front support 6, and the lower side of the upper support 2 may also be pivotally connected to the front support 6; or the front side of the rear support 1, the rear side of the front support 6 and the lower side of the upper support may be coaxially pivotally connected, as long as the rotating upper support 2 when the baby carriage is folded can drive the first unlocking device to move relative to the rear support 1 and unlock the locking mechanism in a linked manner. The specific settings may be adaptively modified according to the above structure.

[0072] like Figures 12 to 14 As shown, in another embodiment, the adapter 42' and the locking member 51' are integrally formed. Specifically, the adapter 42' is integrally formed on the side of the locking member 51' facing the rear bracket 1; the whole formed by the locking member 51' and the adapter 42' can only move left and right relative to the first connecting seat 12 and the second connecting seat 31 but cannot rotate. When the first unlocking member moves downward, the adapter can be driven to move in the direction toward the back, thereby driving the locking member to move together and unlocking the locking mechanism. Because the two are integrally formed, there is no need to set the above-mentioned third accommodating groove and the first matching portion and the second matching portion.

[0073] In this embodiment, the second locking portion 511' is arranged on the outer ring of the locking member 51'. Gear teeth 515' are also arranged on the outer ring of the locking member 51' facing away from the rear bracket 1, and correspondingly, the second accommodating groove 311 is arranged as a tooth groove meshing with the gear teeth. Alternatively, the gear teeth 515' are arranged as end face ratchet teeth on the side facing the rear bracket. Alternatively, the size of the end of the adapter facing the locking member is smaller than the diameter of the end face of the gear (locking member), so that the second end face ratchet teeth can be arranged on the end face of the gear. That is to say, in combination with the aforementioned embodiment, it is acceptable to arrange the second locking member on the end face or the outer ring of the locking member.

[0074] In the above-mentioned embodiments, the first locking portion 122 and the second locking portion 511' can also be respectively set as the first end face tooth and the second end face tooth; or, the locking member can also be directly set as a gear, and the part of the teeth on the gear facing the rear bracket is set as the second locking portion, and the first receiving groove is set as a tooth groove, and the tooth groove is set as the first locking portion. Under the action of the second elastic member, the gear is engaged with the second receiving groove and the first receiving groove which are set as tooth grooves at the same time. After driving the locking member to move and disengage from the first receiving groove 121, the locking member can rotate together with the backrest relative to the rear bracket 1.

[0075] In this embodiment, because the locking member and the adapter are integrally formed, the lower end of the steel wire is directly connected to the locking member and the adapter to form an integral body, that is, the lower end of the steel wire is inserted into the second accommodating groove and then connected to the integral body. The connection between the steel wire and the integral body can be any known and feasible method. When the baby carriage is in the unfolded state, when the backrest inclination angle is to be adjusted, the operating member 32 is driven to move relative to the backrest 3, and the integral body can be pulled into the second accommodating groove 311 by the steel wire, so that the second end face ratchet teeth 511' on the locking member 51' are disengaged from the meshing with the first end face ratchet teeth 122, and the locking mechanism is unlocked, and the integral body and the backrest 3 can be rotated relative to the rear bracket 1 together. At this time, the backrest can be rotated forward / backward to achieve the adjustment of the backrest inclination angle. When it is rotated to the required angle position, the operating member 32 can be released. Under the action of the second elastic member, the locking mechanism is in a locked state again.

[0076] When the baby stroller of the present invention is folded, the upper bracket is rotated backward and downward to drive the first unlocking member 41 to move downward. Through the cooperation of the fourth inclined surface and the third inclined surface 511', the whole is driven to move in the direction of the backrest, that is, to move into the second receiving groove. When the locking member 51' moves to the point where the second end face ratchet teeth 515' are disengaged from the first end face ratchet teeth 122', the locking mechanism is unlocked and the backrest 3 can rotate relative to the rear bracket 1.

[0077] In the above embodiments, the driving locking member moves away from the rear bracket to unlock the locking mechanism. In another embodiment, the locking mechanism includes a locking member 51-1 (such as Figure 15 shown) that is connected to the first connecting seat 12 so as to be movable relatively left and right on one side (i.e., connected to the first receiving groove on one side), and a first locking portion and a second locking portion that cooperate with each other are provided between the second connecting seat 31-1 and the other side of the locking member 51-1; when the first locking portion and the second locking portion cooperate with each other, the locking member and the first connecting seat cannot rotate relative to each other, and the backrest cannot rotate relative to the rear bracket, and the locking mechanism is in a locked state; the cooperation between the locking member 51-1 and the first unlocking member is set such that when the first unlocking member 41 moves downward, the locking member 51-1 can be driven to move toward the rear bracket, so that the first locking portion and the second locking portion are disengaged from each other, and the locking mechanism is unlocked, and the backrest 3 can rotate relative to the rear bracket 1.

[0078] The locking mechanism further includes a second elastic member disposed between the locking member 51-1 and the first connecting seat 12 and capable of driving the locking member 51 to move toward the backrest direction, so that under the action of the second elastic member, the locking member can automatically move toward the backrest direction to make the first locking portion and the second locking portion cooperate with each other.

[0079] The setting principle of the first locking portion and the second locking portion is the same as that of the foregoing embodiments, so it will not be elaborated here.

[0080] To achieve the purpose that the downward movement of the first unlocking member can drive the locking member to move toward the rear bracket direction, an adapter 42-1 can be fixedly connected or integrally formed on the side of the locking member 51-1 facing the rear bracket. The adapter 42-1 is provided with a mating groove 422-1 with an upward opening on the side facing the rear bracket. One side wall of the mating groove 422-1 is set as a third inclined surface (not shown in the figure), and a mating fourth inclined surface is provided on the side of the lower side of the first unlocking member facing the third inclined surface; when the first unlocking member moves downward, it can extend into the driving groove 422-1, and through the cooperation of the third inclined surface and the fourth inclined surface, the locking member 51-1 is driven to move toward the rear bracket direction, so that the first locking portion and the second locking portion are disengaged from each other, and then the locking mechanism is unlocked.

[0081] When the first unlocking member and the locking member / adapter / adapter are in the above different mating manners, the connection manner between its lower side and the rear bracket can be adaptively structurally changed, and this structural change can be any known and feasible manner, so it will not be elaborated here.

[0082] When the locking member is arranged in such a manner, a rotatable adapter can be arranged in the second receiving groove. The adapter is arranged between the bottom wall of the second receiving groove and the unlocking member, and a first engaging portion and a second engaging portion which can cooperate with each other are respectively arranged on the opposite sides of the adapter and the unlocking member; the lower end of the steel wire is connected to the adapter. When the steel wire pulls the adapter to rotate, under the cooperation of the first engaging portion and the second engaging portion, the locking member is driven to move towards the direction of leaning back.

[0083] In each of the above embodiments, a front wheel 60 is arranged at the front lower part of the front bracket 6, and a rear wheel 10 is arranged at the rear lower part of the rear bracket 1.

[0084] A driving member 20 is arranged on the lower side of the upper bracket 2, and the driving groove 21 is arranged on the driving member 20.

[0085] In this embodiment, the upper bracket 2 includes a push handle 23 pivotally connected to the rear bracket 1 at the lower side and a connecting pipe 24 pivotally connected to the rear bracket 1 at the lower side. And the push handle 23 can rotate and switch between a forward position (such as Figure 1 the position shown) and a rearward position (such as Figure 17 the position shown). The front peripheral side of the seat cloth is connected to the connecting pipe 24, and the rear side of the cloth is connected to the backrest 3 (not shown in the figure); the driving member 20 is arranged on the lower side of the connecting pipe 24. The upper side of the first linkage 71 is pivotally connected to the connecting pipe 24. When the push handle 23 is in the rearward position, it can rotate and fold downward together with the connecting pipe 24.

[0086] The connection of the seat cloth to the connecting pipe 24 and the backrest 3, the commutation of the push handle 23 and its connection to the connecting pipe can be any well-known and feasible structures, and are not the inventive points of the present invention, so they will not be elaborated here.

[0087] In other embodiments, it can also be that the upper bracket does not provide the connecting pipe 24 and is directly set as the push handle 23. The driving member is arranged on the lower side of the push handle 23, and the push handle cannot be commuted forward and backward. The first linkage rod 71 is pivotally connected to the push handle 23. It can also be that the push handle 23 and the connecting pipe 24 are relatively fixedly connected, and the push handle cannot be commuted forward and backward. The driving member 20 is arranged on the lower side of any one of the push handle 23 and the connecting pipe 24.

[0088] Those skilled in the art should understand that the orientation or positional relationship indicated by the above terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. In the above description, the position where the front wheel 60 is located is the front, the position where the rear wheel 10 is located is the rear, the position where the upper bracket 2 is located is the upper, the positions where the front wheel 60 and the rear wheel 10 are located are the lower, and the relative positions of the rear bracket 1 and the seat backrest 3 are respectively left and right. 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 vision changes, the above orientation or positional relationship will also change accordingly. Therefore, it should not be construed as a limitation to the present invention.

Claims

1. A baby stroller that can be switched between an unfolded state and a folded state, the baby stroller comprising a frame and a seat connected to the frame; the frame includes an upper bracket, a front bracket, and a rear bracket, and the rear side of the front bracket, the front side of the rear bracket, and the lower side of the upper bracket are pivotally connected coaxially, or two of them are pivotally connected, and the third is pivotally connected to any one of the two, and the seat includes a backrest, and is characterized in that: The lower side of the backrest is pivotally connected to the rear bracket, and a locking mechanism is provided between the backrest and the rear bracket to limit the relative rotation of the two; the baby carriage also includes a first unlocking device movably connected to the rear bracket, the upper side of the first unlocking device is cooperated with the upper bracket, and the lower side is cooperated with the locking mechanism; when the baby carriage is folded, the rotating upper bracket can drive the first unlocking device to move relative to the rear bracket to unlock the locking mechanism in conjunction.

2. The stroller according to claim 1, characterized in that: The first unlocking device includes a first unlocking member connected to the rear bracket and can be moved up and down relatively, the upper side of the first unlocking member is cooperated with the upper bracket, and the lower side is cooperated with the locking mechanism; when the upper bracket rotates rearward and downward, the first unlocking member movable member can be driven to move downward to unlock the locking mechanism; preferably, a first elastic member that can drive the first unlocking member to move upward is provided between the first unlocking member and the rear bracket; preferably, a driving groove is provided on the side of the upper bracket facing the first unlocking member movable member, and the upper side of the first unlocking member movable member extends into the driving groove; and at least one of the upper end surface of the first unlocking member movable member and the groove wall of the driving groove facing the first unlocking member is provided with an inclined surface.

3. The baby carriage according to claim 2, characterized in that: The rear bracket is provided with a first connecting seat, and the lower end of the backrest is provided with a second connecting seat, and the first connecting seat is pivotally connected to the second connecting seat; preferably, a first accommodating groove is provided on the side of the first connecting seat facing the second connecting seat, and the lower side of the first unlocking member extends into the first accommodating groove; preferably, a connecting member is relatively fixedly connected to the rear bracket, and the first connecting seat is provided on the lower side of the connecting member; an accommodating cavity is provided between the connecting member and the rear bracket, and the first unlocking member movable member can move up and down in the accommodating cavity, and the upper side of the first unlocking member movable member extends out of the upper side of the connecting member and cooperates with the upper bracket.

4. The stroller according to claim 3, characterized in that: The locking mechanism includes a locking piece on one side which can be relatively movably connected to the second connecting seat left and right, and a first locking portion and a second locking portion that cooperate with each other are provided between the first connecting seat and the other side of the locking piece, and when the first locking portion cooperates with the second locking portion, the locking mechanism is in a locked state; preferably, the locking mechanism also includes a second elastic piece arranged between the locking piece and the second connecting seat, which can drive the locking piece to move toward the direction of the rear bracket, and under the action of the second elastic piece, the locking piece can be moved in the direction of the rear bracket so that the first locking portion cooperates with the second locking portion; preferably, the first locking portion and the second locking portion are first end face ratchet teeth and second end face ratchet teeth that can mesh with each other and are respectively arranged on the opposite sides of the first connecting seat and the locking piece; preferably, the first end face ratchet teeth and the second end face ratchet teeth are arranged so that when the two are engaged, the backrest can be rotated forward, and to rotate the backrest backward, the locking mechanism needs to be unlocked first.

5. The stroller according to claim 4, wherein: The cooperation between the locking member and the first unlocking member is configured such that when the first unlocking member moves downward, the locking member can be driven to move in the direction of leaning against the back, thereby causing the first locking portion to disengage from the second locking portion and the locking mechanism to be unlocked.

6. The stroller according to claim 5, characterized in that: The first unlocking member is cooperatively arranged with the locking member through an adapter. The adapter is integrally formed on one side of the locking member facing the rear bracket. The side of the adapter facing the rear bracket is cooperatively arranged with the lower side of the first unlocking member. When the first unlocking member moves downward, it can drive the adapter to move in the direction towards the backrest, thereby driving the unlocking member to move together. Or, the adapter is connected to the rear bracket in a relatively left-right movable manner, and the side of the adapter facing the rear bracket is cooperatively arranged with the lower side of the first unlocking member, and the other side is cooperatively arranged with the locking member. The first unlocking member moving downward can drive the adapter to move in the direction towards the backrest, and when the adapter moves in the direction towards the backrest, it can push the locking member to move to the side away from the rear bracket, thereby unlocking the locking mechanism.

7. The stroller according to claim 6, wherein: The adapter is further arranged to be rotatable relative to the first connection seat, and a first mating portion and a second mating portion are respectively arranged on the opposite sides of the adapter and the locking member; by rotating the adapter, the locking member is driven to move in the direction towards the backrest under the cooperation of the first mating portion and the second mating portion.

8. The stroller according to claim 6 or 7, characterized in that: A third inclined surface is arranged on the side of the adapter facing the rear bracket, and a fourth inclined surface is arranged on the side of the lower side of the first unlocking member facing the third inclined surface; preferably, a whole circle of inclined surface is arranged on the outer circle of the side of the adapter facing the rear bracket, and this whole circle of inclined surface is set as the third inclined surface; preferably, at least part of the adapter is placed in the first receiving groove in a relatively left-right movable manner.

9. The baby stroller according to claim 5, characterized in that: The first unlocking member is cooperatively arranged with the locking member through an adapter. The adapter is arranged to be rotatably connected to the first connection seat, and the side of the adapter facing the rear bracket is cooperatively arranged with the lower side of the first unlocking member, and the other side is cooperatively arranged with the locking member; when the first unlocking member moves downward, it can drive the adapter to rotate, so that the locking member is driven to move to the side away from the rear bracket; preferably, a first mating portion and a second mating portion are respectively arranged on the opposite sides of the adapter and the locking member; when the adapter rotates, the locking member is driven to move in the direction towards the backrest through the cooperation of the first mating portion and the second mating portion; preferably, a torsion spring is arranged between the adapter and the first connection seat.

10. The stroller according to any one of claims 4 to 9, characterized in that: A second receiving groove is arranged on the side of the second connection seat facing the first connection seat. One side of the locking member is placed in the second receiving groove in a relatively left-right movable manner; preferably, gear teeth are arranged on the outer circle of the locking member. Correspondingly, the second receiving groove is set as a tooth groove meshing with the side of the gear teeth away from the rear bracket.

11. The stroller according to claim 3, wherein: The locking mechanism includes a locking member that is connected to the first connecting seat so as to be movable relatively left and right on one side, and a first locking portion and a second locking portion that cooperate with each other are provided between the second connecting seat and the other side of the locking member; when the first locking portion and the second locking portion cooperate with each other, the locking mechanism is in a locked state; preferably, the cooperation between the locking member and the first unlocking member is set such that when the first unlocking member moves downward, the locking member can be driven to move in the direction towards the rear bracket, so that the first locking portion and the second locking portion are disengaged from each other, and the locking mechanism is unlocked; preferably, a transfer member is connected or integrally formed on the side of the locking member facing the rear bracket, and a mating groove with an upward opening is provided on the side of the transfer member facing the rear bracket, one side wall of the mating groove is set as a third inclined surface, and a fourth inclined surface that cooperates with the third inclined surface is provided on the side of the lower side of the first unlocking member facing the third inclined surface; when the first unlocking member moves downward, it can extend into the driving groove, and through the cooperation of the third inclined surface and the fourth inclined surface, the locking member is driven to move in the direction towards the rear bracket.

12. The stroller according to claim 11, wherein: A second receiving groove is provided on the side of the second connecting seat facing the first connecting seat, and a transfer member that is rotatable relative to the unlocking member is disposed between the bottom wall of the second receiving groove and the unlocking member, and a first mating portion and a second mating portion that can cooperate with each other are respectively provided on the opposite sides of the transfer member and the unlocking member; when the transfer member rotates, under the cooperation of the first mating portion and the second mating portion, the locking member is driven to move in the direction towards the rear bracket.

13. The stroller according to any one of claims 4 to 12, characterized in that: A second unlocking device for unlocking the locking mechanism is further provided on the backrest; preferably, the second unlocking device includes an operating member movably connected to the backrest and a linkage structure pivotally connected to the upper side of the operating member, and the lower side of the linkage structure is connected to the transfer member or the locking member or the whole formed by integrally forming the transfer member and the locking member; driving the operating member to move relative to the backrest can unlock the locking mechanism by pulling the transfer member to rotate or pulling the transfer member to move or pulling the locking member to move or pulling the whole formed by integrally forming the transfer member and the locking member through the linkage structure; preferably, the linkage structure is set as a steel wire.

14. The stroller according to any one of claims 1 to 13, characterized in that: The lower side of the upper bracket is pivotally connected to the rear bracket.

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