Baby stroller with foldable seat

Abstract

The present invention belongs to the technical field of baby carriages, and in particular to a baby carriage with a seat that can be folded in linkage. The baby carriage comprises a lower front frame, a lower rear frame that is hinged on the lower front frame and can rotate relative to the lower front frame, an upper frame that is arranged on the lower front frame and can slide along the lower front frame, and a seat that is arranged on the lower front frame or the upper frame and can slide along the lower front frame with the upper frame, wherein the seat comprises a seat frame and a backrest frame that is hinged to the seat frame; the frame adopts a folding method in which the upper frame can slide relative to the lower front frame, which is equivalent to embedding most of the upper frame in the lower front frame, so that the volume of the folded frame is smaller, especially in terms of thickness, and the folded frame is more flexible and convenient for transportation and storage.

Description

[Technical field]

[0002] The invention belongs to the technical field of baby carriages, and in particular relates to a baby carriage with a seat capable of being linked and folded. [Background technology]

[0004] A baby stroller is a "vehicle" for babies, which requires someone to help push or pull it. It is an essential means of transportation for parents to take their babies to the street or for a walk. With the development of baby strollers, their portability has been valued by parents. Since baby strollers are large in size when unfolded, they are usually folded and folded with a foldable frame for easy transportation or storage. Therefore, the folding method and folding operation of baby stroller products have become one of the selling points to attract consumers.

[0005] The existing baby strollers are generally folded by rotating the frame hinge to fold it in half. However, for the rotating folding method, firstly, the thickness of the baby stroller will be very large after it is rotated and folded in half. Secondly, the seat cannot be folded. Generally, it just rotates with the frame to become a vertical state. Then, by releasing the backrest frame, the seat is changed to a vertical state with the backrest on the top and the seat on the bottom, so that it can be folded together with the baby stroller, but the backrest is in a free state. In the folded state, the backrest can still swing freely, and a fixed folded state cannot be formed, resulting in inconvenience in transportation. [Summary of the invention]

[0007] In order to solve the problem in the prior art that a baby carriage frame is hinged and rotated to be folded, resulting in a large volume after folding, the present invention provides a baby carriage with a seat that can be folded in a linked manner.

[0008] The present invention is achieved through the following technical solutions:

[0009] A baby carriage with a seat that can be folded in linkage, comprising a lower front frame, a lower rear frame hinged on the lower front frame and rotatable relative to the lower front frame, an upper frame arranged on the lower front frame and slidable along the lower front frame, and a seat arranged on the lower front frame or the upper frame and slidable along the lower front frame along with the upper frame, wherein the seat comprises a seat frame and a backrest frame hinged to the seat frame;

[0010] A frame locking mechanism is provided at the connection between the upper frame and the lower front frame to limit the sliding of the upper frame relative to the lower front frame and to limit the relative rotation of the lower rear frame and the lower front frame; a seat locking mechanism is provided at the hinge between the seat frame and the backrest frame to limit the relative rotation of the seat frame relative to the backrest frame; and an unlocking mechanism for unlocking the frame locking mechanism is also provided on the upper frame;

[0011] After the unlocking mechanism unlocks the frame locking mechanism, the upper frame can drive the seat to slide downward along the lower front frame, and the lower rear frame can be rotated and folded along the hinge to the lower front frame, and the seat locking mechanism is unlocked when it slides to the lowest point or during the sliding process, and the seat frame can be rotated and folded relative to the backrest frame.

[0012] As described above, the baby carriage with a foldable seat is provided with a top fork at the lower side of the seat. After the seat slides downward along the lower front frame along with the upper frame, the lower front frame presses the top fork to unlock the seat locking mechanism.

[0013] As described above, the baby carriage with a seat that can be linked and folded, the upper frame is also provided with an armrest frame that can slide along the upper frame, and the armrest frame is also provided with an armrest locking mechanism that limits the armrest frame from sliding relative to the upper frame, the unlocking mechanism is provided at the upper end of the upper frame and can unlock the armrest locking mechanism, and when the armrest frame slides along the upper frame to the lowest point, it presses the frame locking mechanism to unlock it.

[0014] As described above, the baby carriage with a seat that can be linked and folded, the frame locking mechanism includes a locking seat arranged in the lower front frame, a pressing plug-in arranged in the locking seat and movable relative to the locking seat, and a locking pin arranged on the pressing plug-in and extending from one side of the locking seat, the upper end of the pressing plug-in extends into the upper frame, and the lower front frame is provided with a slot for the locking pin to pass through, when the pressing plug-in is pressed and moved downward relative to the locking seat, the locking pin can move inwardly to disengage from the slot, and the upper frame can slide along the lower front frame.

[0015] As described above, the baby carriage with a seat that can be linked and folded, a long groove extending along the length direction of the lower front frame is provided on the inner outer surface of the lower front frame, and a seat connecting block extending from the long groove to the outer side of the lower front frame is provided on one side of the locking seat, and the seat is detachably connected to the seat connecting block.

[0016] As described above, the baby carriage with a seat that can be linked and folded, an articulated seat is provided at the upper end of the lower rear frame, and the frame locking mechanism also includes a linked locking piece arranged in the articulated seat, one side of the linked locking piece extends into the lower rear frame and is opposite to the locking seat, and a locking opening for the linked locking piece to pass through is provided on the lower front frame, and the locking seat presses the linked locking piece during the downward movement so that the linked locking piece moves toward the articulated seat and disengages from the locking opening, so that the lower rear frame can rotate relative to the lower front frame.

[0017] As described above, the baby carriage with a seat that can be linked and folded, the linked locking component includes a first cross plate arranged in the hinge seat, and locking columns arranged at both ends of the first cross plate and extending into the lower front frame. The side surface of the locking seat is provided with a guide groove for the locking column to extend into, the inner side of the guide groove is a guiding inclined surface that gradually reduces the groove depth from bottom to top, and a return spring is also provided between the first cross plate and the hinge seat.

[0018] In the baby carriage with a foldable seat as described above, the armrest locking mechanism includes an elastic protrusion arranged on the rear side of the armrest frame, the upper frame is provided with a locking opening for the elastic protrusion to pass through, and the unlocking mechanism includes a ring buckle arranged on the locking opening, and the elastic protrusion can be pressed by pulling the ring buckle to disengage from the locking opening.

[0019] In the baby carriage with a foldable seat as described above, a folding lock seat is further connected to the lower end of the armrest frame, and the folding lock seat is provided with a folding protrusion extending to one side of the armrest frame. The upper frame is provided with a folding positioning opening for the folding protrusion to pass through when the armrest frame moves down to the lowest point. The armrest frame is also provided with an unlocking button, and by pressing the unlocking button, the folding protrusion can be moved toward the folding lock seat to disengage from the folding positioning opening.

[0020] The foldable stroller according to the present invention has a seat that can be folded in a linked manner, wherein the backrest frame is provided with a backrest hinge seat, the seat frame is provided with a seat hinge seat hinged with the backrest hinge seat, the seat hinge seat is provided with a cavity on one side of the seat hinge seat opposite to the backrest hinge seat, the lower side of the backrest hinge seat is provided with an opening for the top fork to extend out, and the backrest hinge seat is also provided with an arc opening, and the backrest hinge seat is also provided with a limit end located at one end of the backrest hinge seat and provided with an arc groove for the limit end to extend into the cavity of the seat hinge seat through the arc opening, and a locking position opened to one side at the end of the arc groove is provided in the cavity of the seat hinge seat. When the top fork is located in the locking position, the seat hinge seat is restricted from rotating relative to the backrest hinge seat, and the top fork moves upward after being pressed, and the limit end of the top fork disengages from the locking position and enters into the arc groove, so that the seat hinge seat can rotate relative to the backrest hinge seat.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The present invention provides a baby carriage with a seat that can be folded in linkage. The frame adopts a folding method in which the upper frame can slide relative to the lower front frame, which is equivalent to embedding most of the upper frame in the lower front frame, so that the volume of the folded frame is smaller, especially in terms of thickness, and it is more flexible after folding, which is convenient for carrying and storage. After sliding, the frame locking mechanism and the seat locking mechanism can be unlocked, so that the lower rear frame can be rotated and folded toward the lower front frame, and the seat frame can be rotated and folded relative to the backrest frame, forming a linkage folding, so that after the frame is folded, the seat can also be kept in a stable folded state.

[0023] 2. The baby stroller with a foldable seat of the present invention has a seat locking mechanism on the seat, so that the seat can be kept in a stable folded state compared to the seat on a traditional baby stroller, and will not loosen after folding. Moreover, the seat locking mechanism can be unlocked by pressing the top fork, so that the seat frame can be rotated relative to the backrest frame to complete folding. This structure can easily achieve folding linkage, and can achieve linkage folding by touching the top fork during the folding process of the frame, making folding easier and simpler to operate.

Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a structural schematic diagram of a baby carriage with a seat that can be folded in linkage according to the present invention;

[0027] Figure 2 Folding process of baby stroller Figure 1 ;

[0028] Figure 3 Folding process of baby stroller Figure 2 ;

[0029] Figure 4 It is a schematic diagram of the structure of the baby carriage after folding;

[0030] Figure 5 It is a structural schematic diagram of a baby carriage frame;

[0031] Figure 6 This is the structural explosion diagram of the baby carriage frame;

[0032] Figure 7 Structural explosion for the frame locking mechanism Figure 1 ;

[0033] Figure 8 Structural explosion for the frame locking mechanism Figure 2 ;

[0034] Figure 9 Structural explosion for the armrest locking mechanism Figure 1 ;

[0035] Figure 10 Structural explosion for the armrest locking mechanism Figure 2 ;

[0036] Figure 11 is a schematic diagram of the structure of the seat;

[0037] Figure 12 This is the structural exploded diagram of the seat;

[0038] Figure 13 Structural explosion of the seat locking mechanism Figure 1 ;

[0039] Figure 14 Structural explosion of the seat locking mechanism Figure 2 ;

[0040] Figure 15 This is a schematic diagram of the seat after it is folded. [Specific implementation method]

[0042] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The present invention is achieved through the following technical solutions:

[0044] like Figures 1 to 15 As shown, the baby carriage with a seat that can be linked and folded comprises a lower front frame 21, a lower rear frame 22 hinged on the lower front frame 21 and rotatable relative to the lower front frame 21, an upper frame 1 arranged on the lower front frame 21 and slidable along the lower front frame 21, and a seat 3 arranged on the lower front frame 21 or the upper frame 1 and slidable along the lower front frame 21 along with the upper frame 1, wherein the seat 3 comprises a seat frame 31 and a backrest frame 32 hinged to the seat frame 31; a mechanism is provided at the connection between the upper frame 1 and the lower front frame 21 to limit the sliding of the upper frame 1 relative to the lower front frame 21 and to limit the sliding of the lower rear frame 22 relative to the lower front frame 21. The frame locking mechanism allows the frame 21 to rotate relative to the frame 21, and the seat locking mechanism is provided at the hinge of the seat frame 31 and the backrest frame 32 to limit the rotation of the seat frame 31 relative to the backrest frame 32, and the upper frame 1 is also provided with an unlocking mechanism for unlocking the frame locking mechanism; after the unlocking mechanism unlocks the frame locking mechanism, the upper frame 1 can drive the seat 3 to slide downward along the lower front frame 21, and the lower rear frame 22 can be rotated and folded along the hinge to the lower front frame 21, and the seat locking mechanism is unlocked when sliding to the lowest point or during the sliding process, and the seat frame 31 can be rotated and folded relative to the backrest frame 32. The present invention provides a baby carriage with a seat that can be folded in linkage, and the frame adopts a folding method in which the upper frame can slide relative to the lower front frame, which is equivalent to embedding most of the upper frame in the lower front frame, so that the volume of the folded frame is smaller, especially in terms of thickness, and it is more flexible after folding, which is convenient for carrying and storage. After sliding, the frame locking mechanism and the seat locking mechanism can be unlocked, so that the lower rear frame can be rotated and folded toward the lower front frame, and the seat frame can be rotated and folded relative to the backrest frame to form a linked folding, so that after the frame is folded, the seat can also be kept in a stable folded state.

[0045] Further, a top fork 301 is provided on the lower side of the seat 3. After the seat 3 slides downward along the upper frame 1 along the lower front frame 21, the lower front frame 21 presses against the top fork 301 to unlock the seat locking mechanism. By simply pressing the top fork, the seat locking mechanism can be unlocked, enabling the seat frame to rotate relative to the backrest frame to complete folding. This structure can easily achieve folding linkage, and can be linked and folded by touching the top fork during the folding process of the frame, making the folding easier and the operation simpler.

[0046] Still further, an armrest frame 101 that can slide along the upper frame 1 is provided on the upper frame 1, and an armrest locking mechanism for restricting the relative sliding of the armrest frame 101 with respect to the upper frame 1 is also provided on the armrest frame 101. The unlocking mechanism is provided at the upper end of the upper frame 1 and can unlock the armrest locking mechanism, and when the armrest frame 101 slides along the upper frame 1 to the lowest point, it presses against the frame locking mechanism to unlock it. Since the upper frame needs to adapt to the height of the parent, it is generally also made in two sections. The existing upper frame and armrest frame both use a hinged method for rotational folding. However, in this solution, a sliding folding method is also adopted, which is equivalent to most of the armrest frame being embedded in the upper frame, and it slides downward along the lower front frame together with the upper frame after folding, making the volume after folding smaller.

[0047] The specific structure of the frame locking mechanism is as follows: As Figure 7 、 Figure 8 shown, the frame locking mechanism includes a lock seat 41 provided in the lower front frame 21, a top pressure plug-in 42 that can move relative to the lock seat 41 provided in the lock seat 41, and a lock pin 43 provided on the top pressure plug-in 42 and extending from one side of the lock seat 41. The upper end of the top pressure plug-in 42 extends into the upper frame 1, and a bayonet 43a for the lock pin 43 to pass through is provided on the lower front frame 21. When the top pressure plug-in 42 is pressed and moves downward relative to the lock seat 41, the lock pin 43 can move inward to disengage from the bayonet 43a, and the upper frame 1 can then slide along the lower front frame 21. It also uses a pressing method for unlocking. When the lower end of the armrest frame moves to the lowest point, it can press against the top pressure plug-in 42 to make the top pressure plug-in 42 move downward. During the downward movement, the lock pin 43 cooperates with the transverse groove of the lock seat 41 through the inclined groove of the top pressure plug-in 42, forcing the lock pin to move horizontally during the downward movement, so that it can disengage from the bayonet and complete the unlocking of the upper frame and the lower front frame. Moreover, a return spring is provided between the lower end of the lock seat 41 and the lock seat 41, which facilitates automatic reset during release and keeps the lock pin on the bayonet.

[0048] Further, a plurality of rollers 41b that contact the inner wall surface of the lower front frame are provided on the outer surface of the lock seat 41 to make its relative sliding with the lower front frame smoother.

[0049] Furthermore, the upper end of the lower rear frame 22 is provided with an articulated seat 221, and the frame locking mechanism also includes a linkage locking member 44 provided in the articulated seat 221, one side of the linkage locking member 44 extends into the lower rear frame 22 and is opposite to the locking seat 41, and the lower front frame 21 is provided with a locking opening for the linkage locking member 44 to pass through, and the locking seat 41 presses the linkage locking member 44 during the downward movement so that the linkage locking member 44 moves toward the articulated seat 221 and disengages from the locking opening, and the lower rear frame 22 can rotate relative to the lower front frame 21. Through a simple structure, the locking seat can unlock the restriction of the lower rear frame while sliding downward. During sliding, the linkage locking member 44 is located in the locking opening, and since the depth of the locking opening gradually decreases from bottom to top, the linkage locking member 44 is gradually pressed to move toward the articulated seat 221, and finally disengages from the lower front frame, and the lower rear frame can rotate relative to the lower front frame.

[0050] Among them, the specific structure of the linkage locking member is as follows: the linkage locking member 44 includes a first transverse plate 441 arranged in the hinge seat 221, and locking columns 4411 arranged at both ends of the first transverse plate 441 and extending into the lower front frame 21, and a guide groove 410 for the locking column 4411 to extend into the side of the locking seat 41 is provided, and the inner side of the guide groove 410 is a guiding inclined surface that gradually reduces the groove depth from bottom to top, and a return spring is also provided between the first transverse plate 441 and the hinge seat 221. Moreover, a second cross plate 442 located on one side of the first cross plate 441 is also provided in the articulated seat 221, and second clamping columns 4421 extending toward the lower front frame are also provided at both ends of the second cross plate 442. In addition, a mounting shell is provided at the lower front frame, and a through hole is provided on the mounting shell for the locking column 4411 and the second locking column 4421 to pass through, and an arc-shaped guide groove is provided in the articulated seat 221, and the locking column 4411 is located in the guide groove and passes out. When the locking column 4411 is pressed toward the articulated seat 221, it is separated from the lower front frame, but is still located in the through hole of the mounting shell. In this way, the articulated seat 221 can rotate under the arc-shaped guide groove structure, and the linkage locking member does not move during the rotation, and the position of the structural connection can be kept unchanged, that is, the locking column 4411 remains in the through hole and does not move. Moreover, by adding the second locking column 4421, the connection is made more stable. When the locking column 4411 is pressed and moved, the first cross plate 441 is also pressed, and at the same time, the second cross plate located on one side thereof is driven to move, which is equivalent to linking the second locking column 4421 to move together.

[0051] The specific structure of the armrest locking mechanism is as follows: Figure 9 , Figure 10As shown, the armrest locking mechanism includes an elastic protrusion 51 arranged on the rear side of the armrest frame 101, and the upper frame 1 is provided with a locking opening 511 for the elastic protrusion 51 to pass through, and the structure is simple and unlocking is convenient. The elastic protrusion can be realized by using a movable protrusion and a spring structure. There are many ways to make the elastic protrusion movable, such as using a combination structure of a button and a steel rope commonly used in baby carriages.

[0052] In this solution, the unlocking method adopts the following structure: the unlocking mechanism includes a buckle 512 provided on the locking opening 511, and the buckle 512 can be pulled to press the elastic protrusion 51 to make it disengage from the locking opening 511. By pulling up the buckle, the elastic protrusion can be pressed to unlock the restriction of the armrest.

[0053] In addition, in order to facilitate the maintenance of a fixed state after folding, the present invention also provides the following structure: Figure 10 As shown, the lower end of the armrest frame 101 is also connected to a folding card lock seat 61, and the folding card lock seat 61 is provided with a folding card protrusion 62 extending to one side of the armrest frame 101. The upper frame 1 is provided with a folding positioning opening 63 for the folding card protrusion 62 to pass through when the armrest frame 101 moves down to the lowest point. The armrest frame 101 is also provided with an unlocking button 64, and by pressing the unlocking button 64, the folding card protrusion 62 can be moved toward the folding card lock seat 61 to be separated from the folding positioning opening 63. The unlocking button is connected to the folding card protrusion 62 of the folding card lock seat 61 through a steel rope (not shown in the figure), so that the folding card protrusion can be pulled by pressing the button.

[0054] In this scheme, if Figures 11 to 15 As shown, the specific structure of the seat is as follows: as described above, it includes a seat 3 arranged on the baby carriage frame and can slide along the frame, the seat 3 includes a seat frame 31 and a backrest frame 32 hinged to the seat frame 31, and a seat locking mechanism is provided at the hinge between the seat frame 31 and the backrest frame 32 to limit the rotation of the seat frame 31 relative to the backrest frame 32, and a top fork 301 is provided on the lower side of the seat 3. After the seat 3 slides downward along the baby carriage frame, the top fork 301 is pressed to unlock the seat locking mechanism, and the seat frame 31 can be rotated and folded relative to the backrest frame 32. The seat locking mechanism is provided on the seat, so that the seat can be kept in a stable folded state compared with the seat on the traditional baby carriage, and will not loosen after folding. Moreover, the seat locking mechanism can be unlocked by pressing the top fork, so that the seat frame can be rotated relative to the backrest frame to complete folding. This structure can easily realize folding linkage, and can realize linkage folding by touching the top fork during the folding of the frame, making folding easier and simpler to operate.

[0055] Moreover, the specific structure of the top fork is as follows: a U-shaped fork opening is provided at its lower end. Among them, a cross bar 210 connecting both sides is provided at the lower end of the lower front frame. When the seat moves downward, the fork opening of the top fork is inserted onto the cross bar for cooperation, thereby forming a top pressure.

[0056] In addition, a backrest adjustment mechanism for adjusting the angle between the adjustable backrest frame 32 and the seat frame 31 is further provided on the seat 3. It is convenient to adjust the inclination angle of the seat backrest, making it more convenient and comfortable for children to use.

[0057] Moreover, an armrest 33 is further included on the seat 3 and is arranged between the seat frame 31 and the backrest frame 32. And the armrest 33 is hinged at the hinge joint of the seat frame 31 and the backrest frame 32. When the seat frame 31 rotates and folds relative to the backrest frame 32, the armrest 33 rotates and folds towards the backrest frame 32 together with the seat frame 31. The armrest 33 is provided on general seats. In this solution, the armrest can also be folded together with the seat, making the volume of the seat smaller after folding and more convenient for storage.

[0058] Specifically, the specific structure of the seat locking mechanism is as follows: a backrest hinge seat 321 is provided on the backrest frame 32, a seat hinge seat 311 hinged to the backrest hinge seat 321 is provided on the seat frame 31. A cavity is provided on one side of the seat hinge seat 311 relative to the backrest hinge seat 321. An opening for the top fork 301 to extend out is provided on the lower side of the backrest hinge seat 321. An arc-shaped opening 321a is further provided inside the backrest hinge seat 321. A limiting end that passes through the arc-shaped opening 321a and extends into the cavity of the seat hinge seat 311 is provided at one end of the top fork 301 located in the backrest hinge seat 321. An arc-shaped groove 311a for the limiting end to extend into and a locking position 311b opened to one side at the end of the arc-shaped groove 311a are provided in the cavity of the seat hinge seat 311. When the top fork 301 is located in the locking position 311b, the rotation of the seat hinge seat 311 relative to the backrest hinge seat 321 is restricted. And when the top fork 301 is pressed upward, the limiting end of the top fork 301 disengages from the locking position 311b and enters the arc-shaped groove 311a, and the seat hinge seat 311 can rotate relative to the backrest hinge seat 321. Its structure is simple, and through the cooperation of the arc-shaped groove and the locking position 311b, the locking and unlocking of the top fork can be realized.

[0059] In addition, in order to increase the locking stability and automatic reset after unlocking, a return spring is further provided between the top fork 301 and the backrest hinge seat 321. When the top fork rotates to the locking position again (i.e., the unfolded state), the top fork is reset by the spring pressing, realizing locking.

[0060] More specifically, the armrest 33 is hinged to the seat hinge seat 311 through an insert 331, and the insert 331 is provided with an arc-shaped notch 331a that can limit its rotation angle. By providing a convex column extending into the arc-shaped notch 331a on the hinge seat, when the armrest rotates, its rotation range can only be limited to the length of the arc-shaped notch until the side walls at both ends of the armrest abut against the convex column, thereby limiting its further rotation.

[0061] Furthermore, the specific structure of the backrest adjustment mechanism is that the backrest hinge seat 321 is provided with a second cavity on the side facing away from the seat hinge seat 311, and the backrest hinge seat 321 is provided with a seat mounting seat 34 embedded in the second cavity. The backrest adjustment mechanism includes an elastic clamping protrusion 35 provided on the backrest frame 32 and extending into the second cavity, a plurality of backrest adjustment positions 36 provided on the seat mounting seat 34 for the elastic clamping protrusion 35 to be clamped, and a backrest adjustment button 37 provided on the backrest frame 32 for pulling the elastic clamping protrusion 35 so that it can be separated from the backrest adjustment position 36. After the elastic clamping protrusion 35 is separated from the backrest adjustment position 36, the backrest frame 32 can rotate relative to the seat mounting seat 34 and the seat frame 31. By clamping the elastic clamping protrusion 35 in different backrest adjustment positions 36, the seat back can be changed to different angles. The structure is simple and the adjustment operation is convenient.

[0062] In addition, a connection position 34a that can be mounted on the baby carriage frame connection block 41a is provided on the outer surface of the seat mounting seat 34. Moreover, a long groove 21a extending along the length direction of the lower front frame 21 is provided on the inner outer surface of the lower front frame 21, and a seat connection block 41a extending from the long groove 21a to the outer side of the lower front frame 21 is provided on one side of the locking seat 41. The seat 3 is detachably connected to the seat connection block 41a. A quick connection structure is formed by connecting the seat connection block 41a, which is convenient for installation and removal.

[0063] The present invention provides a baby carriage with a seat that can be folded in linkage. The frame adopts a folding method in which the upper frame can slide relative to the lower front frame, which is equivalent to embedding most of the upper frame in the lower front frame, so that the volume of the folded frame is smaller, especially in terms of thickness, and it is more flexible after folding, which is convenient for carrying and storage. After sliding, the frame locking mechanism and the seat locking mechanism can be unlocked, so that the lower rear frame can be rotated and folded toward the lower front frame, and the seat frame can be rotated and folded relative to the backrest frame, forming a linkage folding, so that after the frame is folded, the seat can also be kept in a stable folded state.

[0064] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the present invention is not limited to these descriptions. Any similarity or similarity with the method, structure, etc. of the present invention, or some technical deductions or replacements made under the premise of the concept of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A baby stroller with a seat that can be folded in a linked manner, characterized in that: It includes a lower front frame (21), a lower rear frame (22) hinged to the lower front frame (21) and rotatable relative to the lower front frame (21), an upper frame (1) provided on the lower front frame (21) and slidable along the lower front frame (21), and a seat (3) provided on the lower front frame (21) or the upper frame (1) and slidable along the lower front frame (21) with the upper frame (1). The seat (3) includes a seat frame (31) and a backrest frame (32) hinged to the seat frame (31). A frame locking mechanism is provided at the connection between the upper frame (1) and the lower front frame (21) to restrict the sliding of the upper frame (1) relative to the lower front frame (21) and the relative rotation between the lower rear frame (22) and the lower front frame (21). A seat locking mechanism is provided at the hinge between the seat frame (31) and the backrest frame (32) to restrict the rotation of the seat frame (31) relative to the backrest frame (32). And an unlocking mechanism for unlocking the frame locking mechanism is also provided on the upper frame (1). After the unlocking mechanism unlocks the frame locking mechanism, the upper frame (1) can drive the seat (3) to slide downward along the lower front frame (21), the lower rear frame (22) can rotate and fold downward relative to the lower front frame (21) along the hinge, and when sliding to the lowest point or during the sliding process, the seat locking mechanism is unlocked, and the seat frame (31) can rotate and fold relative to the backrest frame (32). A top fork (301) is provided on the lower side of the seat (3). After the seat (3) slides downward along the lower front frame (21) with the upper frame (1), the lower front frame (21) presses against the top fork (301) to unlock the seat locking mechanism. A backrest hinge seat (321) is provided on the backrest frame (32), a seat hinge seat (311) hinged to the backrest hinge seat (321) is provided on the seat frame (31). A cavity is provided on one side of the seat hinge seat (311) relative to the backrest hinge seat (321). An opening for the top fork (301) to extend out is provided on the lower side of the backrest hinge seat (321). An arc-shaped opening (321a) is also provided inside the backrest hinge seat (321). A limiting end of the top fork (301) located at one end of the backrest hinge seat (321) extends into the cavity of the seat hinge seat (311) through the arc-shaped opening (321a). An arc-shaped groove (311a) for the limiting end to extend into is provided in the cavity of the seat hinge seat (311), and a locking position (311b) opened to one side is provided at the end of the arc-shaped groove (311a). When the top fork (301) is located in the locking position (311b), the rotation of the seat hinge seat (311) relative to the backrest hinge seat (321) is restricted. And when the top fork (301) is pressed and moves upward, the limiting end of the top fork (301) disengages from the locking position (311b) and enters the arc-shaped groove (311a), and the seat hinge seat (311) can rotate relative to the backrest hinge seat (321).

2. The stroller with a seat that can be linked and folded according to claim 1, characterized in that , A handrail frame (101) that can slide along the upper frame (1) is further provided on the upper frame (1), and a handrail locking mechanism for restricting the relative sliding of the handrail frame (101) with respect to the upper frame (1) is also provided on the handrail frame (101). The unlocking mechanism is provided at the upper end of the upper frame (1) and can unlock the handrail locking mechanism, and when the handrail frame (101) slides along the upper frame (1) to the lowest point, it presses against the frame locking mechanism to unlock it.

3. The stroller with a seat that can be linked and folded as claimed in claim 2, wherein , The frame locking mechanism includes a lock seat (41) provided in the lower front frame (21), a pressing plug (42) that can move relative to the lock seat (41) provided in the lock seat (41), and a lock pin (43) provided on the pressing plug (42) and extending out from one side of the lock seat (41). The upper end of the pressing plug (42) extends into the upper frame (1), and a bayonet (43a) for the lock pin (43) to pass through is provided on the lower front frame (21). When the pressing plug (42) is pressed to move downward relative to the lock seat (41), the lock pin (43) can move inward to disengage from the bayonet (43a), and the upper frame (1) can then slide along the lower front frame (21).

4. The stroller with a seat that can be linked and folded as claimed in claim 3, wherein , A long groove (21a) extending along the length direction of the lower front frame (21) is formed on the outer surface of the inner side of the lower front frame (21). A seat connecting block (41a) that extends from the long groove (21a) to the outside of the lower front frame (21) is provided on one side of the lock seat (41), and the seat (3) is detachably connected to the seat connecting block (41a).

5. The stroller with a seat that can be linked and folded according to claim 3, characterized in that , A hinge seat (221) is provided at the upper end of the lower rear frame (22). The frame locking mechanism further includes a linkage lock (44) provided in the hinge seat (221). One side of the linkage lock (44) extends into the lower rear frame (22) and faces the lock seat (41). A lock opening for the linkage lock (44) to pass through is provided on the lower front frame (21). When the lock seat (41) moves downward, it presses against the linkage lock (44) to move the linkage lock (44) away from the lock opening in the direction of the hinge seat (221), and the lower rear frame (22) can then rotate relative to the lower front frame (21).

6. The stroller with a seat that can be linked and folded according to claim 5, characterized in that , The linkage lock (44) includes a first cross plate (441) provided in the hinge seat (221), and lock columns (4411) provided at both ends of the first cross plate (441) and extending into the lower front frame (21). A guiding groove (410) for the lock columns (4411) to extend into is provided on the side surface of the lock seat (41). The inner side of the guiding groove (410) is a guiding inclined surface with a gradually decreasing groove depth from bottom to top, and a return spring is further provided between the first cross plate (441) and the hinge seat (221).

7. The baby stroller with a foldable seat according to claim 2, characterized in that , The armrest locking mechanism includes an elastic protrusion (51) provided at the rear side of the armrest frame (101). A clamping position opening (511) for the elastic protrusion (51) to pass through is provided on the upper vehicle frame (1). The unlocking mechanism includes a loop (512) provided on the clamping position opening (511). By pulling the loop (512), the elastic protrusion (51) can be pressed to disengage from the clamping position opening (511).

8. The stroller with a seat that can be linked and folded as claimed in claim 2, wherein , A folding lock seat (61) is further connected to the lower end of the armrest frame (101). A folding clamping protrusion (62) extending to one side of the armrest frame (101) is provided on the folding lock seat (61). A folding positioning opening (63) for the folding clamping protrusion (62) to pass through is provided on the upper vehicle frame (1) when the armrest frame (101) moves down to the lowest point. An unlocking button (64) is further provided on the armrest frame (101). By pressing the unlocking button (64), the folding clamping protrusion (62) can be moved towards the folding lock seat (61) to disengage from the folding positioning opening (63).

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