Baby carriage

Abstract

A frame of the baby carriage comprises an upper support, a front support and a rear support, the rear side of the front support and the front side of the rear support are pivoted to different positions of the upper support respectively, and a first locking device used for locking the front side of the rear support and the upper support in an unfolded state is arranged between the front side of the rear support and the upper support. A second locking device for locking the front bracket and the upper bracket in an unfolded state is arranged between the rear side of the front bracket and the upper bracket; a linkage device is arranged between the first locking device and the second locking device, and when the first locking device is unlocked, the second locking device can be unlocked through the linkage device; or, the frame further comprises an unlocking device, the first locking device and the second locking device are both connected with the unlocking device in a matched mode, and the unlocking device can be driven to unlock the two locking devices together. In the unfolded state, the baby carriage is locked by the two locking devices, so that the baby carriage is more stable; and the two locking devices and the second locking device can be unlocked together, so that the unlocking operation is very simple 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] Baby carriages are widely used as carriers for infants to sit / lie on. For more convenient use, they generally include a carriage frame that can be switched between an unfolded state and a folded state, and a seat connected to the carriage frame.

[0003] The carriage frame of a conventional baby carriage generally includes pivotally connected components, and there is only a locking device between two pivotally connected components for locking the two in the unfolded state. After unlocking the locking device, the carriage frame can be folded. However, the setting of only one locking device on the entire carriage frame poses certain potential safety hazards to the stability when the carriage frame is in the unfolded state. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned drawbacks and provide a baby carriage which is provided with two locking devices, so that when in the unfolded state, the baby carriage is locked more stably, and thus the use safety is higher; and the two unlocking devices can be unlocked together, so that the unlocking operation of the baby carriage of the present invention is also very simple.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A baby carriage, which includes a carriage frame that can be switched between an unfolded state and a folded state. The carriage frame includes an upper bracket, a front bracket, and a rear bracket. The rear side of the front bracket and the front side of the rear bracket are respectively pivotally connected to different positions of the upper bracket. A first locking device for locking the two in the unfolded state is provided between the front side of the rear bracket and the upper bracket, and a second locking device for locking the two in the unfolded state is provided between the rear side of the front bracket and the upper bracket; a linkage device is provided between the first locking device and the second locking device. When the first locking device is unlocked, the second locking device can be unlocked through the linkage device; or, the carriage frame further includes an unlocking device, and the first locking device and the second locking device are both cooperatively connected to the unlocking device. Driving the unlocking device can unlock the first locking device and the second locking device.

[0007] A first pivot seat is provided at the lower end of the upper bracket, and a second pivot seat is provided at the upper end of the rear bracket. The rear side of the front bracket and the second pivot seat are respectively pivotally connected to different positions of the first pivot seat; the first locking device is provided between the first pivot seat and the second pivot seat, and the second locking device is provided between the rear bracket and the first pivot seat; preferably, the first locking device is located above the second locking device.

[0008] The unlocking device includes an unlocking member movably connected to the upper bracket and a driving member movably connected to the first pivot seat, and the driving member is cooperatively arranged with the first locking device.

[0009] The unlocking device further includes a first traction member, the upper end of the first traction member is connected to the unlocking member, and the lower end is connected to the driving member; by driving the unlocking member, the driving member can be pulled to move through the first traction member to unlock the first locking device.

[0010] The unlocking device further includes a second traction member, the upper end of the second traction member is connected to the driving member, and the lower end is connected to the second locking device; or, the linkage device is arranged as a second traction member, the upper end of the second traction member is connected to the first locking device, and the lower end is connected to the second locking device.

[0011] The unlocking device further includes a third traction member, the upper end of the third traction member is connected to the unlocking member, and the lower end is connected to the second locking device, and the driving member is also connected to the third traction member; or, the lower side of the third traction member bifurcates into two branches, and the lower ends of the two branches are respectively connected to the driving member and the second locking device.

[0012] The driving member can be rotatably and relatively movably connected to the first pivot seat, and a first mating portion and a second mating portion are respectively arranged on the opposite sides of the first pivot seat and the driving member; when the driving member is pulled to rotate, under the cooperation of the first mating portion and the second mating portion, the driving member moves in the direction towards the second pivot seat to unlock the first locking device.

[0013] The first locking device includes a first tooth groove and a second tooth groove respectively arranged on the opposite sides of the first pivot seat and the second pivot seat, a gear movably placed in the first tooth groove and the second tooth groove, and a first elastic member arranged between the gear and the bottom wall of the second tooth groove. Under the action of the first elastic member, the gear meshes with the first tooth groove and the second tooth groove at the same time, so that the first pivot seat and the second pivot seat cannot rotate relative to each other; preferably, the upper end of the linkage device is connected to the gear; preferably, the driving member can be rotatably and relatively movably placed between the bottom wall of the first tooth groove and the gear, and the first mating portion is arranged on the bottom wall of the first tooth groove.

[0014] The second locking device includes a locking member movably connected to the first pivot seat in a relatively up-and-down manner, a second elastic member arranged between the locking member and the first pivot seat, and a locking hole with an upward opening arranged at the rear side of the front bracket. The lower end of the second elastic member is connected to the locking member; under the action of the second elastic member, the locking member moves downward and the lower side is caught in the locking hole; preferably, the lower end of the first traction member or the second traction member or the third traction member is connected to the locking member.

[0015] The frame further includes a linkage member, the front side of the linkage member is pivotally connected to the front bracket, and the rear side is pivotally connected to the rear bracket; preferably, the rear side of the front bracket is pivotally connected to the upper bracket through a first rotating shaft, the front side of the rear bracket is pivotally connected to the upper bracket through a second rotating shaft, the front side of the linkage member is pivotally connected to the front bracket through a third rotating shaft. When the frame is in the unfolded state, the first rotating shaft, the second rotating shaft, and the third rotating shaft are distributed in a triangle, and the first rotating shaft is located behind the third rotating shaft and below the second rotating shaft.

[0016] A connecting seat is fixedly connected to the side of the second pivot seat facing away from the first pivot seat; preferably, the stroller further includes a seat, and the seat is connected to the connecting seat; preferably, the front bracket is fixedly connected with a locking portion, the locking portion extends into the space between the connecting seat and the first pivot seat, and the locking hole is provided on the locking portion; a receiving cavity is formed between the connecting seat and the first pivot seat, and the locking member is disposed in the receiving cavity so as to be relatively movable up and down; at least a part of the locking hole is located in the receiving cavity; preferably, a through hole is provided on the bottom wall of the first tooth groove, and the first tooth groove communicates with the receiving cavity through the through hole.

[0017] Since the stroller of the present invention adopts the above technical solutions, the following beneficial effects are achieved:

[0018] 1. Locking devices are provided between the front bracket and the upper bracket and between the rear bracket and the upper bracket respectively. When in the unfolded state, the stroller is locked more stably, thus having higher safety in use;

[0019] 2. The first locking device and the second locking device can be unlocked together, without the need for two unlocking operations for the two locking devices, so that the unlocking operation of the stroller of the present invention is also very simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a perspective schematic view of the frame of the stroller of the present invention in the unfolded state;

[0021] Figure 2 is a plan schematic view of the frame of the stroller of the present invention in the unfolded state;

[0022] Figure 3 is an enlarged exploded view of part A in Figure 1 ;

[0023] Figure 4 is an enlarged exploded view of another angle of part A in Figure 1 ;

[0024] Figure 5 is an enlarged sectional view taken along line B-B in Figure 2 ;

[0025] Figure 6 An enlarged schematic view of one embodiment of the first traction member;

[0026] Figure 7 An enlarged schematic view of another embodiment of the first traction member 43;

[0027] Figure 8 A three-dimensional schematic view of the frame of the stroller of the present utility model during the folding process;

[0028] Figure 9 A plan view of the frame of the stroller of the present utility model during the folding process;

[0029] Figure 10 A plan view of the frame of the stroller of the present utility model in the folded state;

[0030] Figure 11 A three-dimensional schematic view of the frame of the stroller of the present utility model in the folded state;

[0031] Figure 12 A three-dimensional schematic view of the stroller of the present utility model with a seat installed;

[0032] Figure 13 A plan view of the stroller of the present utility model with a seat installed. Detailed implementation manners

[0033] As Figures 1 to 5 shown, the present utility model discloses a stroller, which includes a frame 100 that can be switched between an unfolded state and a folded state. The frame 100 includes an upper bracket 1, a front bracket 2, and a rear bracket 3. The rear side of the front bracket 2 and the front side of the rear bracket 3 are respectively pivotally connected to different positions of the upper bracket 1. A first locking device for locking the two to the unfolded state is provided between the front side of the rear bracket 3 and the upper bracket 1, and a second locking device for locking the two to the unfolded state is provided between the rear side of the front bracket 2 and the upper bracket 1. And the first locking device is located above the second locking device; the frame 100 further includes an unlocking device, and both the first locking device and the second locking device are cooperatively connected to the unlocking device. Driving the unlocking device can unlock the first locking device and the second locking device.

[0034] The pivotal connection position between the front side of the rear bracket 3 and the upper bracket 1 is located below the pivotal connection position between the rear side of the front bracket 2 and the upper bracket 1, so as to achieve the purpose that the first locking device is located above the second locking device.

[0035] Preferably, a first pivot seat 11 is provided at the lower end of the upper bracket 1, and a second pivot seat 31 is provided at the upper end of the rear bracket 3. The rear side of the front bracket 2 and the second pivot seat 31 are respectively pivotally connected to different positions of the first pivot seat 11, so as to achieve the purpose of pivotally connecting the rear bracket 3, the front bracket 2 and the upper bracket 1. The first locking device is arranged between the first pivot seat 11 and the second pivot seat 31, and the second locking device is arranged between the rear bracket 3 and the first pivot seat 11.

[0036] The unlocking device includes an unlocking member 41 movably connected to the upper bracket 1 and a driving member 42 movably connected to the first pivot seat 11, and the driving member 42 is arranged in cooperation with the first locking device; the unlocking device further includes a first traction member 43 and a second traction member 44. The upper end of the first traction member 43 is connected to the unlocking member 41, and the lower end is connected to the driving member 42; the upper end of the second traction member 44 is connected to the driving member 42, and the lower end is connected to the second locking device; driving the unlocking member 41, the driving member 42 can be pulled to move by the first traction member 43 to unlock the first locking device, and when the driving member 42 moves, the second locking device can be pulled to unlock by the second traction member 44.

[0037] In this embodiment, the driving member 42 can rotate relative to and move relative to the first pivot seat 11 and is connected to the first pivot seat 11. A first matching portion 111 and a second matching portion 421 are respectively arranged on the opposite sides of the first pivot seat 11 and the driving member 42. When the driving member 42 is pulled to rotate, under the cooperation of the first matching portion 111 and the second matching portion 421, the driving member 42 moves in the direction towards the second pivot seat 31 to unlock the first locking device.

[0038] In this embodiment, an arc-shaped protrusion 111 and an arc-shaped groove 421 are respectively arranged on the opposite sides of the first pivot seat 11 and the driving member 42. The arc-shaped protrusion 111 extends into the arc-shaped groove 421, and first inclined surfaces 112 and second inclined surfaces 422 which are in cooperation with each other are respectively arranged on the opposite side surfaces of the arc-shaped protrusion 111 and the arc-shaped groove 421; the arc-shaped protrusion 111 and the arc-shaped groove 421 are respectively set as the first matching portion 111 and the second matching portion 421. The first matching portion 111 and the second matching portion 421 can also be set as any other known and feasible structures as long as the above functions can be achieved.

[0039] The first locking device includes a first tooth groove 110 and a second tooth groove 310 respectively disposed on opposite sides of the first pivot seat 11 and the second pivot seat 31, a gear 51 movably disposed in the first tooth groove 110 and the second tooth groove 310, and a first elastic member 52 disposed between the gear 51 and the bottom wall of the second tooth groove 310. Under the action of the first elastic member 52, the gear 51 meshes with the first tooth groove 110 and the second tooth groove 310 simultaneously, and the first locking device is in a locked state, and the first pivot seat 11 and the second pivot seat 31 cannot rotate relative to each other, that is, the rear bracket 3 and the upper bracket 1 cannot rotate relative to each other, and the two are locked in the unfolded state.

[0040] The driving member 42 is rotatable relative to and movably disposed between the bottom wall of the first tooth groove 110 and the gear 51, and the first engaging portion 111 is disposed on the bottom wall of the first tooth groove 110.

[0041] The second locking device includes a locking member 61 movably connected to the first pivot seat 11 in a vertically movable manner, a second elastic member 62 disposed between the locking member 61 and the first pivot seat 11, and an upwardly opening locking hole 21 disposed at the rear side of the front bracket 2. The lower end of the second elastic member 62 is connected to the locking member 61; under the action of the second elastic member 62, the locking member 61 moves downward and the lower side is engaged in the locking hole 21, and the second locking device is in a locked state, and the front bracket 2 and the first pivot seat 11 cannot rotate relative to each other, that is, the front bracket 2 and the upper bracket 1 cannot rotate relative to each other.

[0042] In this embodiment, the locking member 61 is configured to be movably connected to the upper bracket 1 in a vertically movable manner. When unlocking the first locking device and the second locking device, pull up the unlocking member 41 to drive the first traction member to move upward, thereby pulling the driving member 42 to rotate. Under the interaction of the first inclined surface 112 of the first engaging portion 111 and the second inclined surface 422 of the second engaging portion 421, the driving member 42 moves toward the gear 51, thereby pushing the gear 51 to move toward the second tooth groove 310. When the gear 51 disengages from the first tooth groove 110 and only meshes with the second tooth groove 310, the first locking device is unlocked, and the rear bracket 3 can rotate relative to the upper bracket 1; during the rotation and movement of the driving member 42, the second traction member 44 is pulled upward, thereby pulling the locking member 61 upward, so that the lower end of the locking member 61 disengages from the locking hole 21 at the rear side of the front bracket 2, thereby unlocking the second locking device. In this way, the first locking device and the second locking device are unlocked together without two separate operations. In another embodiment, the unlocking member 41 can also be movably connected to the upper bracket 1 in other ways, and its connection with the first traction member 43 can also be any known and feasible structure, which is not the inventive point of the present invention, so it will not be elaborated here.

[0043] In other embodiments, it may also be that the unlocking device includes the above-mentioned unlocking member 41 and driving member 42, and further includes a third traction member 45 (not shown in the figure). The upper end of the third traction member 45 is connected to the unlocking member 41, and the lower end is connected to the unlocking member 41, that is, connected to the second locking device, and the driving member 42 is also connected to the third traction member 45. Driving the unlocking member 41 can pull the driving member 42 to move through the third traction member 45 to unlock the first locking device, and the movement of the driving member 42 or / and the driving of the unlocking member 41 can also pull the lower end of the third traction member 45 to move upward to unlock the second locking device. That is to say, the third traction member 45 is connected to both the driving member 42 and the locking member 61. The third traction member 45 can be one, and two connection positions 451, 452 are arranged at intervals thereon (as Figure 6 shown). The driving member 42 and the locking member 61 are connected to different positions of the one third traction member 45. Moving the unlocking member 41 upward drives the third traction member 45 to move upward as well. The driving member 42 is pulled to rotate, and the driving member 42 rotates and moves as described above to unlock the first locking device. During the rotation and movement of the driving member 42, the locking member 61 is pulled to move upward through a section of the third traction member 45 that connects the driving member 42 and the locking member 61 respectively to unlock the second locking device, thereby realizing the unlocking of the first locking device and the second locking device together. In another embodiment, it may also be that the lower side of the third traction member 45 bifurcates into two branches 453, 454 (as Figure 7 shown). The lower ends of the two branches are respectively connected to the driving member 42 and the locking member 61 (that is, connected to the second locking device). Thus, moving the unlocking member 41 upward drives the third traction member 45 to move upward as well. One branch pulls the driving member 42 to rotate, and the driving member 42 moves upward as described above to unlock the first locking device. The other branch pulls the locking member 61 to move upward to unlock the second locking device. In this way, the unlocking of the first locking device and the second locking device together can also be realized.

[0044] In another embodiment, a linkage device may also be provided between the first locking device and the second locking device. When the first locking device is unlocked, the second locking device can be unlocked through the linkage device. The linkage device is provided as a second traction member (not shown in the figure). The upper end of the second traction member is connected to the gear 51, and the lower end is connected to a locking member 61 (not shown in the figure). That is to say, in the foregoing embodiment, the upper end of the second traction member is connected to the driving member 42, while in this embodiment, the upper end of the second traction member is connected to the first locking device. In this embodiment, the unlocking device also includes the above-mentioned unlocking member 41, driving member 42, and a first traction member 43 with its upper and lower ends respectively connected to the unlocking member 41 and the driving member 42. Thus, when the first locking device is unlocked and the gear 51 is pushed by the driving member 42 that rotates and moves towards the second tooth groove 310, the locking member 61 can be pulled upwards by the second traction member, so that the lower end of the locking member 61 disengages from the locking hole 21 at the rear side of the front bracket 2, thereby unlocking the second locking device. Thus, the first locking device and the second locking device can also be unlocked together.

[0045] A through hole 113 is provided on the bottom wall of the first tooth groove 110, so as to facilitate the lower end of the first traction member or the second traction member or the third traction member 45 to pass through the through hole 113 and be connected to the locking member 61.

[0046] In this embodiment, each traction member can be provided as a steel wire or a similar structure. Its connection with the relevant components is a well-known technology and not the inventive point of the present utility model, so it will not be elaborated here.

[0047] In this embodiment, the vehicle frame 100 further includes a linkage member 7. The front side of the linkage member 7 is pivotally connected to the front bracket 2, and the rear side is pivotally connected to the rear bracket 3. Preferably, the rear side of the front bracket 2 is pivotally connected to the upper bracket 1 through a first rotating shaft 20, the front side of the rear bracket 3 is pivotally connected to the upper bracket 1 through a second rotating shaft 30, and the front side of the linkage member 7 is pivotally connected to the front bracket 2 through a third rotating shaft 70. When the stroller is in the unfolded state, the first rotating shaft 20, the second rotating shaft 30, and the third rotating shaft 70 are distributed in a triangle, and the first rotating shaft 20 is located behind the third rotating shaft 70 and below the second rotating shaft 30.

[0048] The linkage member 7 is pivotally connected to the rear bracket 3 through a fourth rotating shaft 71. When the stroller is in the unfolded state, the fourth rotating shaft 71 is located at the lower rear side of the second rotating shaft 30.

[0049] Combined Figure 8 、 9As shown, when the baby stroller of the present utility model is to be folded, first unlock the first locking device and the second locking device, and then rotate the upper bracket 1 backward and downward. The upper bracket 1 rotates around the front bracket 2 with the second rotating shaft 30 as the rotation point. As a result, the lower side of the upper bracket 1 will rotate upward and move, driving the rear side of the front bracket 2 to rotate upward. At this time, the front side of the linkage 7 will pull the front bracket 2 to rotate backward until the components can no longer rotate relative to each other, and the baby stroller is folded. And when the baby stroller is in the folded state, the upper bracket 1, the front bracket 2, the rear bracket 3 and the linkage 7 are all relatively close to each other (as shown in Figure 10 , 11 ).

[0050] And because the first rotating shaft 20, the second rotating shaft 30, and the third rotating shaft 70 are arranged as described above, with the front end position of the front bracket 2 unchanged, the length of the front bracket 2 is relatively long enough. And when the front bracket 2 is long enough, during the folding process, the whole baby stroller will not fall forward onto the ground as a whole. Instead, like the baby stroller of the present utility model, when folding, the whole baby stroller will be in a standing state, making the operation more convenient. If the first rotating shaft 20, the second rotating shaft 30, and the third rotating shaft 70 are in the same straight line as in the conventional design, with the front end position of the front bracket 2 unchanged, the length of the front bracket 2 will be relatively short. As a result, when the rear side of the front bracket 2 is driven to rotate upward during folding, the front lower side of the front bracket 2 will be suspended, which will cause the whole baby stroller to fall forward onto the ground.

[0051] When the folded baby stroller is to be unfolded, rotate the upper bracket 1 in the reverse direction. In this embodiment, preferably, the first tooth groove 110 extends from the bottom wall in the direction towards the second tooth groove 310 with a first limiting portion 114, and the second tooth groove 310 extends from the bottom wall in the direction towards the first tooth groove 110 with a second limiting portion 311 (as shown in Figure 3 , 4 ), and the first limiting portion 114 extends into the second tooth groove 310. During the process of unfolding the folded frame 100, when the upper bracket 1 rotates to the point where the second limiting portion 311 abuts against one side of the first limiting portion 114 and cannot continue to rotate in this direction, it indicates that the frame 100 has rotated to the unfolded state. In this way, the unfolding operation of the frame 100 is made more intuitive.

[0052] Preferably, the upper bracket 1 includes a first bracket 13 and a second bracket 14. The rear side of the front bracket 2 and the front side of the rear bracket 3 are pivotally connected to the first bracket 13, and the lower side of the second bracket 14 is connected to the upper side of the first bracket 13 in a relatively vertically movable manner. When the stroller is in the unfolded state, the first bracket 13 and the second bracket 14 are in the unfolded state, so that the overall length of the upper bracket 1 is longer and the upper end is at a relatively high position, which is convenient for the caregiver to push the stroller; when it is to be folded, the second bracket 14 can be moved downward relative to the first bracket 13 to shorten the overall length of the entire upper bracket 1, thereby reducing the overall volume of the folded stroller. In other embodiments, it is also possible that the lower side of the second bracket 14 is pivotally connected to the upper side of the first bracket 13, so that when folding, the second bracket 14 is rotated downward, and the overall length of the entire upper bracket 1 can also be shortened.

[0053] In this embodiment, a connecting seat 8 is fixedly connected to a side of the second pivot seat 31 away from the first pivot seat 11. The stroller further includes a seat 200, and the seat 200 is connected to the connecting seat 8 (as Figure 12 、 13 shown). The structure of the seat 200 and its connection manner with the connecting seat 8 can be any well-known technology, and since it is not the inventive point of the present invention, it will not be elaborated here.

[0054] Non-circular protrusions 115 and grooves 81 are respectively provided on opposite sides of the first pivot seat 11 and the connecting seat 8. The protrusions 115 are fitted into the grooves 81, which not only facilitates the connection and positioning of the first pivot seat 11 and the connecting seat 8, but also makes it not easy to rotate relative to each other after the two are fixedly connected, so that the seat 200 is more stable and safer to use. The protrusions 115 and the grooves 81 can be set as quadrilateral, triangular, polygonal or other irregular shapes.

[0055] The front bracket 2 is fixedly connected with a locking portion 22. The locking portion 22 extends into the space between the connecting seat 8 and the first pivot seat 11, and a locking hole 21 is provided on the locking portion 22; an accommodation cavity 80 is formed between the connecting seat 8 and the first pivot seat 11; the locking member 61 is disposed in the accommodation cavity 80 in a relatively vertically movable manner; at least a part of the locking hole 21 is located in the accommodation cavity 80. The second elastic member 62 is provided as a compression spring, which is located in the accommodation cavity 80, and its upper end contacts the top wall of the accommodation cavity 80, and its lower end is connected to the locking member 61.

[0056] In this embodiment, opposite first cavities 116 and second cavities 82 are respectively provided on opposite sides of the first pivot seat 11 and the connecting seat 8, and the first cavities 116 and the second cavities 82 form the accommodation cavity. In other embodiments, it is also possible that the first pivot seat 11 or the connecting seat 8 is provided with the accommodation cavity alone.

[0057] The first tooth groove 110 communicates with the accommodation cavity 80 through the through hole 113. The lower end of the first traction member 43 or the lower end of the second traction member 44 passes through the through hole 113 and enters the accommodation cavity 80 to be connected to the locking member 61.

[0058] With the above arrangement, not only the cooperation between the locking member 61 and the locking hole 21 is not contacted by external objects and is more stable, but also the function of connecting the seat 200 is taken into account, making the most of one thing. As a result, not only does the structure of the entire stroller look more compact, but also the manufacturing cost is saved.

[0059] A front wheel 91 is connected to the front lower side of the front bracket 2, and a rear wheel 92 is connected to the rear lower side of the rear bracket 3. Preferably, the front wheel 91 is arranged to be rotatable relative to the front bracket 2 about a vertical axis. Thus, before folding, the angle of the front wheel 91 can be adjusted by rotation to avoid premature interference between the front wheel 91 and related components during each rotation process, and further enable the front bracket 2 to be closer to the rear bracket 3, that is, to make the volume of the folded frame 100 smaller.

[0060] The structure for the rotation adjustment of the front wheel 91 can be any well-known structure, and since it is not the inventive point of the present invention, it will not be elaborated here.

[0061] Those skilled in the art should understand that the orientation or positional relationship indicated by the above front, rear, left, right, up, down, etc. is based on the orientation or positional relationship shown in the drawings, and 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, and therefore should not be construed as a limitation to the present invention; and when the visual perspective changes, the orientation will change accordingly.

[0062] The above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made in accordance with the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A baby carriage, which includes a carriage frame that can be switched between an unfolded state and a folded state, characterized in that: The frame includes an upper bracket, a front bracket, and a rear bracket. The rear side of the front bracket and the front side of the rear bracket are respectively pivotally connected to different positions of the upper bracket. A first locking device is provided between the front side of the rear bracket and the upper bracket for locking the two in the unfolded state, and a second locking device is provided between the rear side of the front bracket and the upper bracket for locking the two in the unfolded state. A linkage device is provided between the first locking device and the second locking device. When the first locking device is unlocked, the second locking device can be unlocked through the linkage device. Alternatively, the frame further includes an unlocking device. The first locking device and the second locking device are both cooperatively connected to the unlocking device. Driving the unlocking device can unlock the first locking device and the second locking device.

2. The stroller according to claim 1, wherein: A first pivot seat is provided at the lower end of the upper bracket, and a second pivot seat is provided at the upper end of the rear bracket. The rear side of the front bracket and the second pivot seat are respectively pivotally connected to different positions of the first pivot seat. The first locking device is provided between the first pivot seat and the second pivot seat, and the second locking device is provided between the rear bracket and the first pivot seat.

3. The baby stroller according to claim 2, wherein: The first locking device is located above the second locking device.

4. The stroller according to claim 2 or 3, characterized in that: The unlocking device includes an unlocking member movably connected to the upper bracket and a driving member movably connected to the first pivot seat, and the driving member is cooperatively arranged with the first locking device.

5. The stroller according to claim 4, wherein: The unlocking device further includes a first traction member. The upper end of the first traction member is connected to the unlocking member, and the lower end is connected to the driving member. Driving the unlocking member can pull the driving member to move through the first traction member to unlock the first locking device.

6. The stroller according to claim 5, characterized in that: The unlocking device further includes a second traction member. The upper end of the second traction member is connected to the driving member, and the lower end is connected to the second locking device. Alternatively, the linkage device is provided as a second traction member. The upper end of the second traction member is connected to the first locking device, and the lower end is connected to the second locking device.

7. The stroller according to claim 4, characterized in that: The unlocking device further includes a third traction member. The upper end of the third traction member is connected to the unlocking member, and the lower end is connected to the second locking device, and the driving member is also connected to the third traction member. Alternatively, the lower side of the third traction member branches into two branches, and the lower ends of the two branches are respectively connected to the driving member and the second locking device.

8. The stroller according to any one of claims 5 to 7, characterized in that: The driving member can be rotatably and relatively moved and connected to the first pivot seat, and a first mating portion and a second mating portion are respectively provided on the opposite sides of the first pivot seat and the driving member. When the driving member is pulled to rotate, under the cooperation of the first mating portion and the second mating portion, the driving member moves in the direction towards the second pivot seat to unlock the first locking device.

9. The stroller according to any one of claims 5 to 7, characterized in that: The first locking device includes a first tooth groove, a second tooth groove respectively provided on the opposite sides of the first pivot seat and the second pivot seat, a gear movably placed in the first tooth groove and the second tooth groove, and a first elastic member provided between the gear and the bottom wall of the second tooth groove. Under the action of the first elastic member, the gear meshes with the first tooth groove and the second tooth groove at the same time, so that the first pivot seat and the second pivot seat cannot rotate relatively. The upper end of the linkage device is connected to the gear.

10. The stroller according to claim 8, wherein: The first locking device includes a first tooth groove and a second tooth groove respectively arranged on opposite sides of the first pivot seat and the second pivot seat, a gear movably disposed in the first tooth groove and the second tooth groove, and a first elastic member disposed between the gear and the bottom wall of the second tooth groove. Under the action of the first elastic member, the gear meshes with the first tooth groove and the second tooth groove simultaneously, so that the first pivot seat and the second pivot seat cannot rotate relative to each other; The upper end of the linkage device is connected to the gear.

11. The baby carriage according to claim 10, characterized in that: The driving member is rotatable relative to and movably disposed between the bottom wall of the first tooth groove and the gear, and the first engaging portion is disposed on the bottom wall of the first tooth groove.

12. The stroller according to any one of claims 2 to 3, 5 to 7, characterized in that: The second locking device includes a locking member movably connected to the first pivot seat in a vertical direction, a second elastic member disposed between the locking member and the first pivot seat, and an upwardly opening locking hole disposed on the rear side of the front bracket. The lower end of the second elastic member is connected to the locking member; under the action of the second elastic member, the locking member moves downward and the lower side is engaged in the locking hole.

13. The stroller according to claim 10 or 11, characterized in that: The second locking device includes a locking member movably connected to the first pivot seat in a vertical direction, a second elastic member disposed between the locking member and the first pivot seat, and an upwardly opening locking hole disposed on the rear side of the front bracket. The lower end of the second elastic member is connected to the locking member; under the action of the second elastic member, the locking member moves downward and the lower side is engaged in the locking hole.

14. The stroller according to any one of claims 1 to 3, 5 to 7, and 10 to 11, characterized in that: The frame further includes a linkage member, the front side of the linkage member is pivotally connected to the front bracket, and the rear side is pivotally connected to the rear bracket.

15. The stroller according to claim 14, wherein: The rear side of the front bracket is pivotally connected to the upper bracket through a first rotating shaft, the front side of the rear bracket is pivotally connected to the upper bracket through a second rotating shaft, and the front side of the linkage member is pivotally connected to the front bracket through a third rotating shaft. When the stroller is in the unfolded state, the first rotating shaft, the second rotating shaft, and the third rotating shaft are distributed in a triangle, and the first rotating shaft is located behind the third rotating shaft and below the second rotating shaft.

16. The stroller according to claim 13, wherein: The frame further includes a linkage member, the front side of the linkage member is pivotally connected to the front bracket, and the rear side is pivotally connected to the rear bracket.

17. The stroller according to claim 16, characterized in that: The rear side of the front bracket is pivotally connected to the upper bracket through a first rotating shaft, the front side of the rear bracket is pivotally connected to the upper bracket through a second rotating shaft, and the front side of the linkage member is pivotally connected to the front bracket through a third rotating shaft. When the stroller is in the unfolded state, the first rotating shaft, the second rotating shaft, and the third rotating shaft are distributed in a triangle, and the first rotating shaft is located behind the third rotating shaft and below the second rotating shaft.

18. The baby carriage according to claim 16 or 17, characterized in that: A connecting seat is fixedly connected to the side of the second pivot seat facing away from the first pivot seat.

19. The stroller according to claim 18, wherein: The stroller further includes a seat, and the seat is connected to the connecting seat.

20. The stroller according to claim 19, wherein: The front bracket is fixedly connected with a locking portion, the locking portion extends into the space between the connecting seat and the first pivot seat, and the locking hole is provided on the locking portion; a receiving cavity is formed between the connecting seat and the first pivot seat, and the locking member is movably disposed in the receiving cavity in a vertical direction; at least a part of the locking hole is located in the receiving cavity.

21. The stroller according to claim 20, wherein: A through hole is provided on the bottom wall of the first tooth groove, and the first tooth groove communicates with the receiving cavity through the through hole.

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