Baby carriage

Abstract

The utility model 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 utility model relates to the field of infant products, 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. Utility Model Content

[0003] The purpose of the utility model is to overcome the above disadvantages and provide a baby stroller, wherein the seat backrest can be unlocked in linkage when the baby stroller is folded, so that the overall folding operation of the baby stroller is very simple.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model 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 utility model 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 utility model is very simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the baby stroller of the utility model in an unfolded state;

[0009] Figure 2 is a schematic diagram of the baby stroller of the utility model in the unfolded state from another angle;

[0010] Figure 3 Based on Figure 2 A magnified schematic diagram of part A;

[0011] Figure 4 Based on Figure 3 A magnified diagram of the explosion;

[0012] Figure 5 Based on Figure 3 Further exploded diagram;

[0013] Figure 6 It is an enlarged schematic diagram of the baby carriage adapter of the utility model;

[0014] Figure 7 Based on Figure 5 A schematic diagram of a part of the components from another angle;

[0015] Figure 8 It is an enlarged schematic diagram of the combination of the connecting member and the first unlocking member movable member of the baby carriage of the present invention;

[0016] Fig. 9 It is an enlarged schematic diagram of the combination of the connecting member and the first unlocking member movable member of the baby carriage of the present invention from another angle;

[0017] Fig.10 Based on Figure 3 A schematic diagram of the cross section enlarged along the BB direction;

[0018] Fig.11 It is an enlarged schematic diagram of the driving component of the baby carriage of the present utility model;

[0019] Fig.12 It is an exploded and enlarged schematic diagram of the backrest lower side, the locking member and the connecting member in another embodiment;

[0020] Fig.13 Based on Fig.12 An enlarged schematic diagram from another angle;

[0021] Fig.14 Based on Fig.12 An enlarged schematic diagram of the middle locking member at another angle;

[0022] Fig.15 It is an enlarged schematic diagram of one embodiment of the locking member of the utility model;

[0023] Fig.16 This is a schematic diagram of the baby stroller of the utility model after being folded;

[0024] Fig.17This is a schematic diagram of the baby stroller of the present invention when the push handle is in the rearward position. DETAILED DESCRIPTION

[0025] like Figures 1 to 10 As shown, the utility model discloses a baby stroller, which can be converted between an unfolded state and a folded state, the baby stroller comprising a frame and a seat connected to the frame; the frame comprising a rear support 1, a front support 6, and an upper support 2, the rear side of the front support 6, the front side of the rear support 1 and the lower side of the upper support 2 are coaxially pivoted, or two of them are pivoted, and the third is pivoted to any one of the two; the seat comprises a backrest 3, the lower side of the backrest 3 is pivoted to the rear support 1, and a locking mechanism is provided between the backrest 3 and the rear support 1 to limit the relative rotation of the two; the baby stroller also comprises a first unlocking device movably connected to the rear support 1, the upper side of the first unlocking device is cooperated with the upper support 2, and the lower side is cooperated with the locking mechanism; when the baby stroller is folded, the rotating upper support 2 can drive the first unlocking device to move relative to the rear support 1 and unlock the locking mechanism in linkage, so that the backrest 3 can rotate relative to the rear support 1.

[0026] The first unlocking device includes a first unlocking member 41 connected to the rear bracket 1 and can be moved up and down relatively. The upper side of the first unlocking member 41 is cooperated with the upper bracket 2, and the lower side is cooperated with the locking mechanism; when the upper bracket 2 rotates rearward and downward, the first unlocking member 41 can be driven to move downward to unlock the locking mechanism.

[0027] The upper bracket 2 is provided with a driving groove 21 on one side facing the first unlocking member 41, and the upper side of the first unlocking member 41 extends into the driving groove 21; at least one of the upper end surface 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 first unlocking member 41 is provided with a first inclined surface 411, and correspondingly, the groove wall of the driving groove 21 facing the first inclined surface 411 is provided with a second inclined surface 211 matching the first inclined surface. When the baby carriage of the utility model is in the unfolded state, under the action of the first elastic member 43, the upper side of the first unlocking member 41 extends into the driving groove 21, and the first inclined surface 411 on the upper side 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, the first unlocking member 41 can be driven to move downward relative to the rear bracket 1 through the cooperation of the first inclined surface 411 and the second inclined surface 211. 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 (such as a first elastic member 43) is provided between the first unlocking member 41 and the rear bracket 1 to drive the first unlocking member to move upward. Fig.10 As shown). Thus, when the driving groove 21 is aligned with the upper side of the first unlocking member 41, the first unlocking member 41 can move upwards relatively under the action of the first elastic member 43, and the upper side extends into the driving groove 21. With such a configuration, when the baby carriage in the folded state is converted to the unfolded state, the first unlocking member 41 can automatically reset under the action of the first elastic member 43, thereby facilitating the next folding operation.

[0029] Combination Figure 7 , 9 As shown in Figures 10 and 10, in this embodiment, the first elastic member 43 is also configured as a compression spring. A first long hole 412 extending up and down is provided in the first unlocking member 41. The rear bracket 1 is provided with a protruding 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. In order to prevent the first elastic member 43 from being easily displaced, the top wall of the first long hole 412 and the abutting member 11 are respectively provided with corresponding spring seats 4121 and 111. The upper side of the first elastic member 43 is sleeved outside the spring seat 4121 of 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 folded, the downward movement of the movable member of the first unlocking member 41 will compress the first elastic member 43.

[0030] In other embodiments, the first elastic member 43 may also be configured as other known and feasible elastic members. When configured as other elastic members, the relevant settings are also changed accordingly.

[0031] The rear support 1 is provided with a first connection seat 12 , and the lower end of the backrest 3 is provided with a second connection seat 31 . The first connection seat 12 is pivotally connected to the second connection seat 31 , so as to achieve the purpose of pivoting the backrest 3 and the rear support 1 .

[0032] A first receiving groove 121 is disposed on one side of the first connecting seat 12 facing the second connecting seat 31 , and the lower side of the first unlocking member 41 extends into the first receiving groove 121 to cooperate 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, and a connecting shaft (not shown) passes through the first connecting seat 12, the second long hole 414, and the second connecting seat 31 to connect the three. Furthermore, a third long hole 415 is also provided on the upper side of the first unlocking member 41, and 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 of the two settings, it can be ensured that the first unlocking member 41 moves up and down smoothly and is not easily misaligned. In other embodiments, the first unlocking member 41 can also be connected to the rear bracket at any other suitable position through the connecting shaft to achieve relative upward and downward movement.

[0034] The rear bracket 1 is relatively fixedly connected with a connecting member 13, and the lower side of the connecting member 13 is provided with the first connecting seat 12; an accommodating cavity is provided between the connecting member 13 and the rear bracket 1, and the movable member of the first unlocking member 41 can move up and down in the accommodating cavity, and the upper side of the movable member of the first unlocking member 41 extends out of the upper side of the connecting member 13 to cooperate with the upper bracket 2. The connecting member 13 is arranged as above, and the first unlocking member 41 can be covered to prevent it from being affected by foreign objects and affecting the linkage unlocking of the locking mechanism. When connected, the one connecting shaft not only connects the first unlocking member 41 and the rear bracket 1, but also connects the connecting member 13.

[0035] The abutting member 11 may also extend from the inner wall of the connecting member 13 toward a side facing the rear bracket 1 .

[0036] In this embodiment, the locking mechanism includes a locking piece 51, one side of which is connected to the second connecting seat 31 so as to be relatively movable left and right, and 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 piece 51; when the first locking portion 122 cooperates with the second locking portion 511, the locking piece 51 and the first connecting seat 12 cannot rotate relative to each other, the backrest 3 cannot rotate relative to the rear bracket 1, and the locking mechanism is in a locked state; the cooperation between the locking piece 51 and the first unlocking piece 41 is arranged so that when the first unlocking piece 41 moves downward, the locking piece 51 can be driven to move in the direction away from the rear bracket 1, so that the first locking portion 122 and the second locking portion 511 are disengaged, the locking mechanism is unlocked, and the backrest 3 can rotate relative to the rear bracket 1.

[0037] The locking mechanism further includes a second elastic member 52 (such as a second elastic member 52) disposed between the locking member 51 and the second connecting seat 31 and capable of driving the locking member 51 to move toward the rear bracket. Fig.10 As shown), under the action of the second elastic member 52, the locking member 51 can automatically move toward the rear bracket so that the first locking portion 122 cooperates with the second locking portion 511.

[0038] Preferably, a second receiving groove 311 is provided on a side of the second connecting seat 31 facing the first connecting seat 12 , and one side of the locking member 51 is disposed in the second receiving groove 311 so as to be relatively movable leftward and rightward.

[0039] The second elastic member 52 can also be configured as a compression spring, which is located in the second receiving groove 311, with one side abutting against the wall of the second receiving groove 311 and the other side abutting against the first unlocking member 41. Under the action of the second elastic member 52, the locking member 51 moves toward the rear bracket 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 stroller of the utility model 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 Fig.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 utility model is very simple.

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

[0048] The seat also includes a seating portion 30, and the seating portion 30 is connected to the frame. In the present embodiment, the frame also includes a first linkage member 71, the upper side of the first linkage member 71 is pivotally connected to the upper bracket 2; the front side of the seating portion 30 is pivotally connected to the front bracket 6, the lower side of the first linkage member 71 is pivotally connected to the seating portion 30, and the pivot position of the first linkage member 71 and the seating portion 30 is located at the rear side of the pivot position of the seating portion 30 and the front bracket 6. Preferably, the lower side of the upper bracket 2 is pivotally connected to the rear bracket 1 around the first rotation axis, the first linkage member 71 is pivotally connected to the rear bracket 1 around the second rotation axis, and when the baby carriage is in the unfolded state, the second rotation axis is located at the upper side of the first rotation axis. With such an arrangement, when the upper bracket 2 is rotated rearward and downward when the baby carriage is folded, the second linkage rod is also driven to rotate downward, so that the rear side of the seating portion 30 of the seat is driven to rotate rearward and downward until the baby carriage is fully folded (such as Fig.12 That is, when the baby carriage is folded, 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.

[0049] Furthermore, the frame further includes a second linkage member 72, the rear side of which is pivotally connected to the rear support 1, and the front side of which is pivotally connected to the lower side of the first linkage member 71 or / and the seating portion 30. Thus, when the baby stroller is folded, as the first linkage member 71 and / or the seating portion 30 rotate downward, the front side of the second linkage member 72 also rotates downward until the baby stroller is completely folded.

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

[0051] Preferably, the front side of the first linkage member 71 and the lower side of the first linkage member 71 are coaxially pivoted to the seat portion 30, thereby making assembly easier. Further, the rear side of the first linkage member 71 and the lower side of the backrest 3 are coaxially pivoted to the rear bracket 1, thereby making assembly easier. In this embodiment, the rear side of the first linkage member 71 is located between the first connecting seat 12 and the rear bracket 1.

[0052] In this embodiment, the adapter 42 is also configured to be rotatable relative to the first connecting seat 12, and the adapter 42 and the locking member 51 are respectively provided with a matching first matching portion 420 and a second matching portion 510 on opposite sides thereof. The adapter 42 is rotated, and under the cooperation of the first matching portion 420 and the second matching portion 510, the locking member 51 is driven to move toward the backrest, that is, to move into the second accommodating 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, so that the backrest 3 can rotate relative to the rear bracket 1.

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

[0054] In other embodiments, the third receiving groove may not be provided on the side of the locking member 51 facing the rear bracket 1, but the first matching portion and the second matching portion may be provided on the end surface opposite to the adapter.

[0055] The backrest 3 is also provided with a second unlocking device for unlocking the locking mechanism, the second unlocking device comprises an operating member 32 movably connected to the backrest 3, and a linkage structure (not shown) connected to the operating member 32 on the upper side, the linkage structure is connected to the adapter 42 on the lower side, drives the operating member 32 to move relative to the backrest 3, and can rotate the adapter 42 by pulling the steel wire. The linkage structure can be a steel wire.

[0056] Specifically, in this embodiment, the lower side of the steel wire is inserted into the second receiving groove 311 and then into the third receiving groove 513 to connect with 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 can be relatively rotatably connected to the backrest 3. The operating member 32 can also be movably connected to the backrest 3 in other forms, as long as it can be pulled by the steel wire to rotate when it moves relative to the backrest 3.

[0057] When the baby carriage is in the unfolded state, when the backrest 3 is to be adjusted in angle, the operating member 32 is rotated to pull the upper side of the steel wire upward, so that the lower side of the steel wire pulls the adapter 42 to rotate, and the fifth inclined surface 4201 on the adapter 42 interacts with the sixth inclined surface on the matching 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 be rotated relative to the rear support 1. At this time, the backrest 3 can be rotated forward and backward, and when it is rotated to the desired angle, the operating member 32 is released, and under the action of the first elastic member 43, the locking member 51 moves in the direction toward the rear support 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 angle position. And this single operation of adjusting the backrest angle will not affect the first unlocking member 41.

[0058] Preferably, when the first locking portion and the second locking portion are respectively configured 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 configured such that when the two are engaged, the backrest 3 can rotate forward without driving the second unlocking device to unlock the locking mechanism, while rotating the backrest backward requires driving the second unlocking device to unlock the locking mechanism. In this way, the utility model makes full use of the characteristics of the end face ratchet teeth to make the operation of adjusting the backrest angle easier.

[0059] Preferably, the outer ring of the adapter 42 on the side facing the rear bracket 1 is provided with a full circle of inclined surfaces, and the full circle of inclined surfaces is set as the third inclined surface 421, so that no matter to which angle the backrest 3 is adjusted, the inclined surface contacts the third inclined surface 421 on the lower side of the first unlocking member 41, that is, no matter to which angle the backrest 3 is rotated, when the stroller is folded, the unlocking device can be linked to unlock the locking mechanism.

[0060] In other embodiments, the adapter can only move relative to the rear bracket, that is, there is no need to set the driving groove 420 and the driving block 510, and the operating member 32 can be driven to move relative to the backrest 3, and the adapter 42 can be pulled by the steel wire to move away from the rear bracket, thereby driving the locking member to move together and unlocking 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 toward the backrest to unlock the locking mechanism.

[0061] Regardless of whether 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, the connection method between it and the backrest 3 and the steel wire, and the connection between the lower side of the steel wire and the adapter 42 / locking member can all be any known and feasible structure, and are not the inventive point of the present utility model, so they will not be repeated here.

[0062] Preferably, the rear support 1 is provided with a first stopper 14, and the outer side of the second connection seat 31 is provided with a second stopper 312 in the direction toward the rear support 1. When the backrest 3 is rotated forward to a set angle, the first stopper 14 abuts against the second stopper 312, so that the backrest 3 cannot be rotated forward any further. In this way, the backrest 3 of the seat will not be rotated forward beyond the set angle position, thereby preventing the child sitting on the seat from being crushed by an erroneous operation when adjusting the angle of the backrest 3, thereby further ensuring the safety of the child. The set angle can be set according to relevant safety regulations combined with special requirements.

[0063] Preferably, the outer ring of the locking member 51 is provided with gear teeth 515, and correspondingly, the second receiving groove 311 is configured as a tooth groove meshing with the gear teeth. With such a configuration, when the adapter 42 is pulled to rotate, the locking member 51 can only move but not rotate, thereby 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 teeth 515 are arranged on the outer ring of the locking member 51, and the second locking portion 511, i.e., the second end face ratchet teeth, are arranged at the end of the locking member 51 facing the rear bracket 1 (such as Figure 7 as shown).

[0065] At least one limiting groove 423 (such as Figure 6 As shown), correspondingly, the third receiving groove 513 (as shown Figure 7 The third stopper 516 is arranged in the stopper groove 423, and the third stopper 516 extends into the stopper groove 423 and can rotate relative to the stopper groove 423. The stopper groove 423 and the third stopper 516 are arranged so that during the rotation of the adapter 42, the fifth inclined surface 4201 and the sixth inclined surface always maintain a state of at least partial contact with each other. Such arrangement can prevent the adapter 42 from rotating without restriction and causing the driving block 510 to completely disengage from the driving groove 420, so as to ensure that the fifth inclined surface 4201 and the sixth inclined surface will not completely disengage from the contact, so that after the operating member 32 is released, the adapter 42 can also be reset under the action of the second elastic member 52.

[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. And the cooperation between the adapter and the first unlocking member is configured so that when the first unlocking member moves downward, the adapter can be driven to rotate, and 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 invention point of the utility model, 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'. The outer ring of the locking member 51' facing away from the rear bracket 1 is also provided with gear teeth 515', and correspondingly, the second receiving groove 311 is provided as a tooth groove meshing with the gear teeth. Alternatively, the side of the gear teeth 515' facing the rear bracket is provided with end face ratchet teeth. 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 provided on the end face of the gear. That is to say, in combination with the aforementioned embodiment, it is acceptable to provide 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 utility model 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 second end face ratchet teeth 515' and disengages 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 locking mechanism is unlocked by driving the locking member to move away from the rear bracket. In another embodiment, the locking mechanism includes a locking member 51-1 (such as a locking member 51-1) connected to the first connecting seat 12 (i.e., one side is connected to the first receiving groove) so as to be relatively movable left and right. Fig.15 As shown), a first locking portion and a second locking portion that cooperate with each other are arranged between the second connecting seat 31-1 and the other side of the locking member 51-1; when the first locking portion cooperates with the second locking portion, the locking member and the first connecting seat cannot rotate relative to each other, 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 arranged so that when the first unlocking member 41 moves downward, the locking member 51-1 can be driven to move in the direction toward the rear bracket, so that the first locking portion and the second locking portion are disengaged, the locking mechanism is unlocked, and the backrest 3 can rotate relative to the rear bracket 1.

[0078] The locking mechanism also includes a second elastic member arranged between the locking member 51-1 and the first connecting seat 12, which can drive the locking member 51 to move in the back-to-back direction, so that under the action of the second elastic member, the locking member can automatically move in the back-to-back direction to make the first locking part cooperate with the second locking part.

[0079] The arrangement principle of the first locking portion and the second locking portion is the same as that of the aforementioned embodiment, and thus will not be described in detail here.

[0080] In order to achieve the purpose of driving the locking member to move toward the rear bracket by moving the first unlocking member downward, an adapter 42-1 can be fixedly connected or integrally formed on the side of the locking member 51-1 facing the rear bracket, and the adapter 42-1 is provided with a mating groove 422-1 opening upward on the side facing the rear bracket, and one side wall of the mating groove 422-1 is provided with a third inclined surface (not shown in the figure), and a matching fourth inclined surface is provided on the lower side of the first unlocking member facing the third inclined surface; the first unlocking member can move downward and extend into the mating groove 422-1, and through the cooperation between the third inclined surface and the fourth inclined surface, the locking member 51-1 is driven to move toward the rear bracket, thereby causing the first locking portion to disengage from the second locking portion, thereby unlocking the locking mechanism.

[0081] When the first unlocking member and the locking member / adapter / adapter are in the above-mentioned different matching modes, the connection mode between the lower side and the rear bracket can be adaptively structurally changed, and the structural change can be any known and feasible mode, so it will not be described here.

[0082] When the locking piece is arranged in this way, a relatively rotatable adapter can be arranged in the second accommodating groove, and the adapter is arranged between the bottom wall of the second accommodating groove and the unlocking piece, and the opposite sides of the adapter and the unlocking piece are respectively provided with a first matching portion and a second matching portion that can cooperate with each other; the lower end of the steel wire is connected to the adapter, and when the steel wire pulls the adapter to rotate, the locking piece is driven to move in the direction toward the back under the cooperation of the first matching portion and the second matching portion.

[0083] In the above embodiments, the front lower portion of the front bracket 6 is provided with a front wheel 60 , and the rear lower portion of the rear bracket 1 is provided with a rear wheel 10 .

[0084] A driving member 20 is disposed on the lower side of the upper bracket 2 , and the driving groove 21 is disposed 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 be in a forward position (such as Figure 1 Position as shown) and backward position (as shown) Fig.17 The front periphery of the seat fabric is connected to the connecting tube 24, and the rear side of the seat fabric is connected to the backrest 3 (not shown); the driving member 20 is arranged at the lower side of the connecting tube 24. The upper side of the first linkage member 71 is pivotally connected to the connecting tube 24. When the push handle 23 is in the rear position, it can be rotated backward and downward together with the connecting tube 24 to be folded.

[0086] The connection between the seat fabric and the connecting tube 24 and the backrest 3 as well as the reversal of the push handle 23 and its connection with the connecting tube can be any known and feasible structure, and are not the inventive point of the utility model, so they will not be described here.

[0087] In other embodiments, the upper bracket may not be provided with the connecting tube 24, but may be directly provided with the push handle 23, the driving member may be provided at the lower side of the push handle 23, and the push handle may not be reversed, and the first linkage rod 71 may be pivotally connected to the push handle 23. Alternatively, the push handle 23 may be relatively fixedly connected to the connecting tube 24, and the push handle may not be reversed, and the driving member 20 may be provided at the lower side of either the push handle 23 or the connecting tube 24.

[0088] Those skilled in the art should understand that the directions or positional relationships indicated by the above-mentioned terms "up", "down", "left", "right", "front", "rear", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. As described above, the front wheel 60 is located at the front, the rear wheel 10 is located at the rear, the upper bracket 2 is located at the top, the front wheel 60 and the rear wheel 10 are located at the bottom, and the relative positions of the rear bracket 1 and the seat back 3 are left and right, respectively. The above description is only for the convenience of describing the embodiments of the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. When the visual observation changes, the above-mentioned direction or positional relationship will also change accordingly, and therefore cannot be understood as a limitation on the utility model.

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 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, 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 baby 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 backward and downward, the first unlocking member movable member can be driven to move downward to unlock the locking mechanism.

3. The baby stroller according to claim 2, characterized in that: A first elastic member capable of driving the first unlocking member to move upward is arranged between the first unlocking member and the rear bracket.

4. The baby stroller according to claim 3, characterized in that: A driving groove is provided on one 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.

5. The baby stroller according to claim 2, 3 or 4, characterized in that: A first connecting seat is arranged on the rear bracket, a second connecting seat is arranged at the lower end of the backrest, and the first connecting seat is pivotally connected to the second connecting seat.

6. The baby stroller according to claim 5, characterized in that: A first receiving groove is provided on one side of the first connecting seat facing the second connecting seat, and the lower side of the first unlocking member extends into the first receiving groove.

7. The baby stroller according to claim 6, characterized in that: A connecting piece is relatively fixedly connected to the rear bracket, and the first connecting seat is arranged on the lower side of the connecting piece; an accommodating cavity is arranged between the connecting piece and the rear bracket, and the first unlocking piece movable piece can move up and down in the accommodating cavity, and the upper side of the first unlocking piece movable piece extends out of the upper side of the connecting piece and cooperates with the upper bracket.

8. The baby stroller according to claim 6 or 7, characterized in that: The locking mechanism includes a locking piece whose one side is connected to the second connecting seat so as to be relatively movable left and right, and a first locking portion and a second locking portion that cooperate with each other are arranged between the first connecting seat and the other side of the locking piece. When the first locking portion cooperates with the second locking portion, the locking mechanism is in a locked state.

9. The baby stroller according to claim 8, characterized in that: The locking mechanism also includes a second elastic member arranged between the locking member and the second connecting seat, which can drive the locking member to move toward the rear bracket. Under the action of the second elastic member, the locking member can move toward the rear bracket to make the first locking part cooperate with the second locking part.

10. The baby stroller according to claim 9, characterized in that: The first locking portion and the second locking portion are first end face ratchet teeth and second end face ratchet teeth respectively arranged on opposite sides of the first connecting seat and the locking member and capable of meshing with each other.

11. The baby stroller according to claim 10, characterized in that: The first end face ratchet teeth and the second end face ratchet teeth are arranged such 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.

12. The baby stroller according to any one of claims 9 to 11, characterized in that: 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.

13. The baby stroller according to claim 12, characterized in that: The first unlocking member is cooperated with the locking member through an adapter, and the adapter is integrally formed on the side of the locking member facing the rear bracket, and the side of the adapter facing the rear bracket is cooperated with the lower side of the first unlocking member; when the first unlocking member moves downward, the adapter can be driven to move in the direction toward the back-resting, thereby driving the unlocking member to move together; or, the adapter can be connected to the rear bracket so as to be relatively movable left and right, and the side of the adapter facing the rear bracket is cooperated with the lower side of the first unlocking member, and the other side is cooperated with the locking member; the first unlocking member moving downward can drive the adapter to move in the direction toward the back-resting, and when the adapter moves in the direction toward the back-resting, it can push the locking member to move to the side away from the rear bracket, thereby unlocking the locking mechanism.

14. The baby stroller according to claim 13, characterized in that: The adapter is also configured to be rotatable relative to the first connecting seat, and the adapter and the locking member are respectively provided with a matching first matching portion and a second matching portion on opposite sides; when the adapter is rotated, the locking member is driven to move in the direction of back-to-back under the cooperation of the first matching portion and the second matching portion.

15. The baby stroller according to claim 13 or 14, characterized in that: A third inclined surface is arranged on a side of the adapter member facing the rear bracket, and a matching fourth inclined surface is arranged on a side of the lower side of the first unlocking member facing the third inclined surface.

16. The baby stroller according to claim 15, characterized in that: The outer circle of the adapter on one side facing the rear bracket is provided with a full circle of inclined surface, and the full circle of inclined surface is set as the third inclined surface.

17. The baby stroller according to claim 16, characterized in that: At least a portion of the adapter is disposed in the first accommodating groove so as to be relatively movable leftward and rightward.

18. The baby stroller according to claim 12, characterized in that: The first unlocking member is cooperated with the locking member through an adapter, and the adapter is configured to be relatively rotatably connected to the first connecting seat, and the adapter is cooperated with the lower side of the first unlocking member on one side facing the rear bracket, and is cooperated with the locking member on the other side; when the first unlocking member moves downward, the adapter can be driven to rotate, so that the locking member is driven to move to the side away from the rear bracket.

19. The baby stroller according to claim 18, characterized in that: The opposite sides of the adapter and the locking member are respectively provided with a first matching portion and a second matching portion that match each other; when the adapter rotates, the locking member is driven to move in a back-to-back direction through the matching of the first matching portion and the second matching portion.

20. The baby stroller according to claim 19, characterized in that: A torsion spring is arranged between the adapter and the first connecting seat.

21. The baby stroller according to any one of claims 9 to 11, 13 to 14, 16 to 20, characterized in that: A second receiving groove is arranged on one side of the second connection seat facing the first connection seat, and one side of the locking member can be relatively moved leftward and rightward and placed in the second receiving groove.

22. The baby stroller according to claim 21, characterized in that: The outer ring of the locking member is provided with gear teeth, and correspondingly, the second accommodating groove is configured as a tooth groove meshing with a side of the gear teeth away from the rear bracket.

23. The baby stroller according to claim 5, characterized in that: The locking mechanism includes a locking piece whose one side is connected to the first connecting seat so as to be relatively movable left and right, and a first locking portion and a second locking portion that cooperate with each other are arranged between the second connecting seat and the other side of the locking piece; when the first locking portion cooperates with the second locking portion, the locking mechanism is in a locked state.

24. The baby stroller according to claim 23, characterized in that: 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 toward the rear bracket, thereby causing the first locking portion to disengage from the second locking portion and the locking mechanism to be unlocked.

25. The baby stroller according to claim 24, characterized in that: The locking member is connected to or integrally formed with a transfer member on the side facing the rear bracket, and the transfer member is provided with a mating groove opening upward on the side facing the rear bracket, one side wall of the mating groove is provided with a third inclined surface, and a matching fourth inclined surface is provided on the lower side of the first unlocking member facing the third inclined surface; the first unlocking member can move downward and extend into the mating groove, and through the cooperation between the third inclined surface and the fourth inclined surface, the locking member is driven to move in the direction toward the rear bracket.

26. The baby stroller according to claim 25, characterized in that: A second accommodating groove is provided on the side of the second connecting seat facing the first connecting seat, and an adapter which can be relatively rotatably placed in the second accommodating groove is provided between the bottom wall of the second accommodating groove and the unlocking member, and a first matching portion and a second matching portion which can cooperate with each other are respectively provided on opposite sides of the adapter member and the unlocking member; when the adapter member rotates, the locking member is driven to move in the direction toward the rear bracket under the cooperation of the first matching portion and the second matching portion.

27. The baby stroller according to any one of claims 13 to 14, 16 to 20, 25 to 26, characterized in that: The backrest is also provided with a second unlocking device for unlocking the locking mechanism.

28. The baby stroller according to claim 27, characterized in that: The second unlocking device includes an operating member movably connected to the backrest, a linkage structure pivotally connected to the operating member on the upper side, and a lower side of the linkage structure being integrally connected to the adapter or the locking member or the adapter and the locking member formed in one piece; the operating member is driven to move relative to the backrest, and the locking mechanism can be unlocked by pulling the adapter to rotate, or pulling the adapter to move, or pulling the locking member to move, or pulling the adapter and the locking member formed in one piece to move as a whole.

29. The baby stroller according to claim 28, characterized in that: The linkage structure is configured as a steel wire.

30. The baby carriage according to any one of claims 1 to 4, 6 to 7, 9 to 11, 13 to 14, 16 to 20, 22 to 26, 28 to 29, characterized in that: The lower side of the upper bracket is pivotally connected to the rear bracket.

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