An improved folding frame of a baby stroller

Abstract

The present invention discloses an improved folding frame of a baby stroller, comprising a front foot group, a rear foot group, a handle group and a rotating joint, etc. The handle group of the folding frame can ensure that the wheel group close to the side of itself can roll in a directional manner and the wheel group far from the side of itself can rotate in a universal direction, no matter it is pushed forward close to the front foot group or the rear foot group, so the use process is more comfortable; at the same time, the front wheel group and the rear wheel group after the baby stroller frame is folded will be locked in a directional rolling state, so that the folded frame can stand stably, making it more convenient to store and place the folding frame. In addition, no matter the handle group is rotated to the same side as the front foot group or the same side as the rear foot group, it can be directly folded, and it is obvious that the entire folding operation process is simpler and provides a better experience for users.

Description

Technical Field

[0001] The invention relates to a folding frame, in particular to an improved folding frame for a baby stroller. Background Art

[0002] At present, some baby stroller folding frames are designed with a handlebar group that can be switched forward and backward for ease of use, that is, the handlebar group can be rotated to the same side as the rear foot group or the same side as the front foot group; however, for a baby stroller, when pushing forward with the handlebar group, the wheel group close to the side must be able to roll in a directional manner, and the wheel group far from the side must be able to rotate in a universal direction, which is the most comfortable to use. For the current baby stroller with a handlebar group that can be switched forward and backward, only when the handlebar group is pushed forward close to the rear foot group can the rear wheel group be directional and the front wheel group be universal. Once the handlebar group is pushed forward close to the front foot group, the rear wheel group is still directional and the front wheel group is universal, which will inevitably bring extremely uncomfortable use effects. At the same time, after the entire frame is folded, the front and rear wheel groups will be in a universal rotation state, which will cause the folded frame to be unable to stand stably, affecting storage and placement. In addition, the existing baby stroller folding frame that can switch the handlebar group between front and rear can only be folded when the handlebar group is rotated to the same side as the rear leg group. Therefore, if the handlebar group is rotated to the same side as the front leg group during actual use, it is necessary to take the trouble to rotate it back to the same side as the rear leg group. Therefore, its structural design has major defects, the folding process is troublesome, and the experience is poor. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an improved baby stroller folding frame which is simple to fold, comfortable to use, stable to stand when stored, and provides a good user experience.

[0004] The technical problem of the present invention is achieved through the following technical solutions:

[0005] An improved folding frame of a baby stroller comprises a front foot group, a rear foot group and a handle group, wherein the upper end of the front foot group, the upper end of the rear foot group and the lower end of the handle group are coaxially hinged to form a rotating joint; the lower end of the front foot group is provided with a front wheel group and a front wheel lock, the lower end of the rear foot group is provided with a rear wheel group and a rear wheel lock, and a joint lock is provided in the rotating joint to connect the front wheel lock and the rear wheel lock respectively. When the baby stroller frame is unfolded, the handle group is rotated to the same side as the rear foot group, the front wheel lock is unlocked by the joint lock and the rear wheel lock is locked by the joint lock, and the corresponding front wheel group rotates universally and the rear wheel lock The handlebar group rolls in a directional manner; the handlebar group rotates to the same side as the front foot group, the front wheel lock is locked by the joint lock and the rear wheel lock is unlocked by the joint lock, the corresponding front wheel group rolls in a directional manner and the rear wheel group rotates in a universal direction; the handlebar group rotates between the front foot group and the rear foot group, the front wheel lock and the rear wheel lock are unlocked by the joint lock, and the corresponding front wheel group and the rear wheel group rotate in a universal direction; when the baby stroller frame is folded, the handlebar group, the front foot group and the rear foot group are folded and closed together, the front wheel lock and the rear wheel lock are locked by the joint lock, and the corresponding front wheel group and the rear wheel group roll in a directional manner.

[0006] The rotating joint is formed by coaxially rotating and articulating a front rotating disk at the upper end of the front foot group, a rear rotating disk at the upper end of the rear foot group, and a lower rotating disk at the lower end of the handle group.

[0007] The joint lock includes a driving arc groove and a reset arc groove which are arranged on the lower turntable with the rotation axis as the center of the circle, and also includes a front slider which is arranged on the front turntable and slides up and down and a rear slider which is arranged on the rear turntable and slides up and down; the outer diameter of the driving arc groove is smaller than the outer diameter of the reset arc groove, and a connected climbing slope is arranged between the driving arc groove and the reset arc groove; the front slider is connected to the front wheel lock, and the rear slider is connected to the rear wheel lock.

[0008] When the baby stroller frame is unfolded, the handlebar group rotates to the same side as the rear foot group, and drives the front slider to slide along the driving arc groove and the rear slider to slide along the reset arc groove, the front slider rises and moves to unlock the front wheel lock and the rear slider moves down and locks the rear wheel lock, the corresponding front wheel group rotates universally and the rear wheel group rolls in a directional manner; the handlebar group rotates to the same side as the front foot group, and drives the front slider to slide along the reset arc groove and the rear slider to slide along the driving arc groove, the front slider moves down and locks the front wheel lock and the rear slider moves up and unlocks the rear wheel lock, the corresponding front wheel group rolls in a directional manner and the rear wheel group rotates universally; the handlebar group rotates to between the front foot group and the rear foot group, and drives the front slider and the rear slider to slide along the driving arc groove, the front slider and the rear slider both rise and move to unlock the front wheel lock and the rear wheel lock, and the corresponding front wheel group and the rear wheel group both rotate universally.

[0009] When the baby stroller frame is folded, the handlebar group, the front foot group and the rear foot group are folded together, and the front slider and the rear slider are driven to slide along the reset arc groove. The front slider and the rear slider are moved downward to lock the front wheel lock and the rear wheel lock, and the corresponding front wheel group and the rear wheel group are directional and roll.

[0010] The front sliding block is provided with a front sliding column passing through the rear rotating disk and cooperating with the driving arc groove or the reset arc groove, the rear sliding block is provided with a rear sliding column cooperating with the driving arc groove or the reset arc groove, the rear rotating disk is provided with a travel groove for the front sliding column to pass through, and the unfolding or folding of the stroller frame can drive the front sliding column to reciprocate in the travel groove.

[0011] The front turntable is provided with a front slide groove extending along the diameter line of the front turntable, and the front slider is installed in the front slide groove and slides up and down; the rear turntable is provided with a rear slide groove extending along the diameter line of the rear turntable, and the rear slider is installed in the rear slide groove and slides up and down.

[0012] A locking tooth is arranged between the lower rotating disk and the rear rotating disk. When the stroller frame is unfolded, the locking tooth is elastically pushed and clamped between the lower rotating disk and the rear rotating disk to form a lock. A handle for driving the locking tooth to disengage from the lower rotating disk is arranged on the handle assembly.

[0013] A locking block is provided between the rear rotating disk and the front rotating disk. When the stroller frame is unfolded, the locking block is elastically pushed and clamped between the rear rotating disk and the front rotating disk to form a lock. When the stroller frame is folded, the handle group is folded and closed relative to the front leg group or the rear leg group, and drives the locking block to slide along the driving arc groove, and the locking block is separated from the front rotating disk, and the rear rotating disk and the front rotating disk are unlocked.

[0014] The front wheel lock comprises a front locking rod which is arranged at the lower end of the front foot group and is elastically pushed to move downward, and a front locking hole which is arranged on the front wheel group and is matched with the front locking rod, and a front pull rope connected between the front locking rod and the front slider; the rear wheel lock comprises a rear locking rod which is arranged at the lower end of the rear foot group and is elastically pushed to move downward, and a rear locking hole which is arranged on the rear wheel group and is matched with the rear locking rod, and a rear pull rope connected between the rear locking rod and the rear slider.

[0015] Compared with the prior art, the present invention mainly designs a folding frame of a baby stroller with an improved structure. No matter the handlebar group of the folding frame is pushed forward close to the front foot group or the rear foot group, it can ensure that the wheel group close to the side of itself can roll in a directional manner, and the wheel group far from the side of itself can rotate in a universal direction, so the use process is more comfortable; at the same time, after the baby stroller frame is folded, the front wheel group and the rear wheel group will be locked in a directional rolling state, which better ensures that the folded frame can stand stably, making the storage and placement of the folding frame more convenient. In addition, no matter the handlebar group is rotated to the same side as the front foot group or the same side as the rear foot group, it can be folded directly. Obviously, the entire folding operation process is simpler and provides users with a better experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the handlebar assembly of the present invention rotated to the same side as the rear foot assembly.

[0017] Figure 2 for Figure 1 Stereoscopic diagram.

[0018] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the joint lock in the state.

[0019] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the front wheel lock in the state.

[0020] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure of the rear wheel lock in the state.

[0021] Figure 6 It is a schematic structural diagram of the handlebar assembly of the present invention rotated to the same side as the front foot assembly.

[0022] Figure 7 for Figure 6 Stereoscopic diagram.

[0023] Figure 8 for Figure 6 Schematic diagram of the cross-sectional structure of the joint lock in the state.

[0024] Fig. 9 for Figure 6 Schematic diagram of the cross-sectional structure of the front wheel lock in the state.

[0025] Fig.10 for Figure 6 Schematic diagram of the cross-sectional structure of the rear wheel lock in the state.

[0026] Fig.11 It is a schematic diagram of the structure of the handlebar assembly of the present invention rotating between the front foot assembly and the rear foot assembly.

[0027] Fig.12 for Fig.11 Schematic diagram of the cross-sectional structure of the joint lock in the state.

[0028] Fig.13 This is a schematic diagram of the structure of the handlebar assembly after folding.

[0029] Fig.14 for Fig.13 Schematic diagram of the cross-sectional structure of the joint lock in the state.

[0030] Fig.15 It is a schematic diagram of the cross-sectional structure of the joint lock when the stroller frame is unfolded.

[0031] Fig.16 This is a three-dimensional exploded view of the front foot group.

[0032] Fig.17 This is a three-dimensional exploded view of the hind leg group.

[0033] Fig.18 It is a schematic diagram of the structure of the lower turntable.

[0034] Fig.19 It is a schematic diagram of the structure of the foot group after the handle group is folded and closed.

[0035] Fig. 20 for Fig.19 A schematic diagram of the structure in which the middle handlebar assembly drives the rear foot assembly and the front foot assembly to fold and close together.

[0036] Fig.21 It is a schematic diagram of the structure of the handlebar group folded and the front foot group closed.

[0037] Fig. 22 for Fig.21 A schematic diagram of the structure in which the middle handlebar assembly drives the front foot assembly and the rear foot assembly to fold and close together. DETAILED DESCRIPTION

[0038] The embodiments of the present invention will be described in detail below with reference to the above-mentioned drawings.

[0039] like Figure 1 to Figure 22 As shown, 1. front foot group, 11. front wheel group, 2. rear foot group, 21. rear wheel group, 3. handle group, 31. handle, 32. knob, 4. rotating joint, 41. front turntable, 411. front slide, 42. rear turntable, 421. travel groove, 422. rear slide, 43. lower turntable, 44. lock tooth, 441. lock tooth spring, 45. lock block, 451. lock block spring, 5. Joint lock, 51. Driving arc groove, 52. Reset arc groove, 53. Climbing ramp, 54. Front slider, 541. Front slide column, 55. Rear slider, 551. Rear slide column, 6. Front wheel lock, 61. Front locking rod, 62. Front locking spring, 63. Front pull rope, 64. Front locking hole, 7. Rear wheel lock, 71. Rear locking rod, 72. Rear locking spring, 73. Rear pull rope, 74. Rear locking hole.

[0040] An improved folding frame for a baby stroller, such as Figure 1 , Figure 2 As shown, it relates to a foldable frame of a baby stroller for babies to ride when going out. Its structure includes a front leg group 1, a rear leg group 2 and a handlebar group 3, etc. The lower end of the front leg group 1 is provided with a front wheel group 11 and a front wheel lock 6, and the lower end of the rear leg group 2 is provided with a rear wheel group 21 and a rear wheel lock 7; the upper end of the front leg group 1, the upper end of the rear leg group 2 and the lower end of the handlebar group 3 are coaxially hinged to form a rotating joint 4, and the rotating joints are respectively arranged on both sides of the foldable frame in this embodiment. Since the rotating joints 4 on both sides and the structures arranged therein are exactly the same, this embodiment only takes one of the rotating joints 4 as an example for structural description.

[0041] The rotating joint 4 is formed by coaxially rotating and hingedly connecting a front rotating disk 41 with a circular shape at the upper end of the front leg group 1, a rear rotating disk 42 with a circular shape at the upper end of the rear leg group 2, and a lower rotating disk 43 with a circular shape at the lower end of the handle group 3, that is, the coaxially hinged front rotating disk 41, rear rotating disk 42 and lower rotating disk 43 can rotate with each other, thereby forming the unfolding or folding of the baby stroller frame.

[0042] The rotating joint 4 is provided with a joint lock 5 which is respectively connected to the front wheel lock 6 and the rear wheel lock 7. The joint lock includes a driving arc groove 51 and a reset arc groove 52 which are arranged on the lower turntable 43 with the rotation axis as the center. The driving arc groove 51 and the reset arc groove 52 are connected by a climbing slope 53 to form a circular closed track. The outer diameter of the driving arc groove 51 needs to be smaller than the outer diameter of the reset arc groove 52, that is, the driving arc groove 51 is more convex and closer to the rotation axis, and the reset arc groove 52 is more concave and farther away from the rotation axis.

[0043] The joint lock 5 also includes a front slider 54 arranged on the front turntable 41 and a rear slider 55 arranged on the rear turntable 42. The specific structure is: the front turntable 41 is provided with a front slide groove 411 extending along the diameter line of the front turntable, and the front slider 54 is installed in the front slide groove 411 and can be lifted and slid, that is, it can be linearly reciprocated along the diameter line of the front turntable; the rear turntable 42 is provided with a rear slide groove 422 extending along the diameter line of the rear turntable, and the rear slider 55 is installed in the rear slide groove 422 and can be lifted and slid, that is, it can be linearly reciprocated along the diameter line of the rear turntable, and the joint lock 5 is respectively connected to the front wheel lock 6 and the rear wheel lock 7. In fact, the front slider 54 is connected to the front wheel lock 6, and the rear slider 55 is connected to the rear wheel lock 7.

[0044] At the same time, since the front turntable 41, the rear turntable 42 and the lower turntable 43 are hinged by overlapping and coaxially rotating, the front slider 54 needs to be provided with a front slide post 541 that passes through the rear turntable 42, and the front slide post cooperates with the driving arc groove 51 or the reset arc groove 52. Accordingly, the rear turntable 42 needs to be provided with a travel groove 421 for the front slide post 541 to pass through, and the front slide post 541 needs to be able to reciprocate in the travel groove 421 when the baby stroller frame is unfolded or folded. Since the rear slider 55 is designed adjacent to the lower turntable 43, it only needs to be provided with a rear slide post 551 that cooperates with the driving arc groove 51 or the reset arc groove 52.

[0045] The front wheel lock 6 includes a front locking rod 61 which is arranged in a mounting seat at the lower end of the front leg group 1 and is elastically pushed downward by a front locking spring 62, and a front locking hole 64 which is arranged on the front wheel group 11 and is fitted with the front locking rod 61. The front locking rod 61 is connected to the front slider 54 by a front pull rope 63.

[0046] The rear wheel lock 7 includes a rear locking rod 71 which is arranged in a mounting seat at the lower end of the rear foot group 2 and is elastically pushed downward by a rear locking spring 72, and a rear locking hole 74 which is arranged on the rear wheel group 21 and is fitted with the rear locking rod 71. The rear locking rod 71 is connected to the rear slider 55 by a rear pull rope 73.

[0047] In this way, when the stroller frame is unfolded, the handlebar group 3 can be rotated to the same side as the rear foot group 2, which will drive the front slider 54 to slide along the driving arc groove 51 and the rear slider 55 to slide along the reset arc groove 52. Since there is a difference in the outer diameters of the driving arc groove 51 and the reset arc groove 52, the front slider 54 sliding along the driving arc groove 51 with a smaller outer diameter will move upward in the front slide groove 411, and then the front lock rod 61 is pulled by the front pull rope 63 to overcome the downward pushing elastic force of the front lock spring 62 and disengage from the front lock hole 64, that is, the front wheel lock 6 is unlocked by the joint lock 5, and the front wheel group 11 can form a universal rotation.

[0048] The rear slider 55 sliding along the reset arc groove 52 with a larger outer diameter will be in a downward moving position relative to the front slider 54 in the rear slide groove 422. This is because the rear locking spring 72 pushes the rear locking rod 71 to move downward into the rear locking hole 74 of the rear wheel group 21, and the downward movement of the rear locking rod 71 will pull the rear slider 55 through the rear pull rope 73 to form a synchronous downward movement trend. This synchronous downward movement trend is just achieved through the reset arc groove 52 with a larger outer diameter. The rear locking rod 71 enters the rear locking hole 74 to lock the rear wheel lock 7, that is, the rear wheel lock 7 is locked by the joint lock 5, and the rear wheel group 21 forms a front and rear directional rolling.

[0049] The handlebar assembly 3 can also be rotated to the same side as the front foot assembly 1, which will drive the rear slider 55 to slide along the driving arc groove 51 and the front slider 54 to slide along the reset arc groove 52. The action process and structural coordination relationship are just opposite to the handlebar assembly 3 rotating to the same side as the rear foot assembly 2, that is, the front slider 54 will move downward through the front locking rod 61 and enter the front locking hole 64, so that the front wheel lock 6 is locked by the joint lock 5, and the front wheel assembly 11 forms a forward and backward directional rolling. The rear slider 55 will move upward, and the rear locking rod 71 will be pulled out of the rear locking hole 74 by the rear pull rope 73, so that the rear wheel lock 7 is unlocked by the joint lock 5, and the rear wheel assembly 21 forms a universal rotation.

[0050] The handlebar group 3 can also be rotated between the front foot group 1 and the rear foot group 2, and drive the front slider 54 and the rear slider 55 to slide along the driving arc groove 51. At this time, the front slider 54 moves up in the front slide groove 411 and pulls the front locking rod 61 out of the front locking hole 64 through the front pull rope 63, and the rear slider 55 moves up in the rear slide groove 422 and pulls the rear locking rod 71 out of the rear locking hole 74 through the rear pull rope 73. Then, the joint lock 5 simultaneously unlocks the front wheel lock 6 and the rear wheel lock 7, and the corresponding front wheel group 11 and rear wheel group 21 can rotate in all directions.

[0051] When the stroller frame is folded, the handlebar group 3, the front leg group 1 and the rear leg group 2 are folded and closed together. In actual use, the handlebar group 3 can be folded and closed relative to the front leg group 1 or the rear leg group 2, and drives the front slider 54 and the rear slider 55 to slide along the reset arc groove 52. At this time, the front slider 54 moves downward in the front slide groove 411 so that the front locking rod 61 enters the front locking hole 64, and the rear slider 55 moves downward in the rear slide groove 422 so that the rear locking rod 71 enters the rear locking hole 74. Then, the joint lock 5 locks the front wheel lock 6 and the rear wheel lock 7 at the same time, and the corresponding front wheel group 11 and the rear wheel group 21 both roll in the front and rear directions.

[0052] In addition, the unfolding or folding structure of the frame mainly comprises a locking tooth 44 provided between the lower rotating disk 43 and the rear rotating disk 42, and a locking block 45 provided between the rear rotating disk 42 and the front rotating disk 41. When the baby stroller frame is unfolded, the locking tooth 44 is elastically pushed by the locking tooth spring 441 to be locked between the lower rotating disk 43 and the rear rotating disk 42, and the locking block 45 is elastically pushed by the locking block spring 451 to be locked between the rear rotating disk 42 and the front rotating disk 41. At this time, the front rotating disk 41, the rear rotating disk 42 and the lower rotating disk 43 cannot rotate relative to each other, so that the baby stroller frame can be unfolded for use.

[0053] When the stroller frame is folded, the handle group 3 is first shortened by the knob 32 on the top of the handle group 3, and then the handle 31 on the side of the handle group 3 is pulled up to drive the locking teeth 44 to disengage from the lower turntable 43. At this time, the handle group 3 can be folded and closed relative to the front leg group 1 or the rear leg group 2. As the handle group 3 continues to rotate during the folding operation, the lower turntable 43 drives the locking block 45 to slide along the driving arc groove 51 and disengage the locking block 45 from the front turntable 41, so that the rear turntable 42 is unlocked from the front turntable 41, and the front turntable 41 and the rear turntable 42 can be folded and closed to each other.

[0054] The handlebar group 3 of the folding frame of the present invention can ensure that the wheel group close to the side of the stroller can roll in a directional manner and the wheel group far from the side of the stroller can rotate in a universal direction, no matter it is pushed forward near the front foot group 1 or the rear foot group 2, so the use process is more comfortable; at the same time, the front wheel group 1 and the rear wheel group 2 will be locked in a directional rolling state after the stroller frame is folded, which better ensures that the folded frame can stand stably, making the storage and placement of the folded frame more convenient. In addition, no matter the handlebar group 3 is rotated to the same side as the front foot group 1 or the rear foot group 2, it can be folded directly, which obviously makes the whole folding operation process simpler and provides users with a better experience.

[0055] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design similar to this embodiment should be included in the protection scope of the present invention.

Claims

1. An improved folding frame of a baby stroller, comprising a front foot group (1), a rear foot group (2) and a handle group (3), wherein the upper end of the front foot group (1), the upper end of the rear foot group (2) and the lower end of the handle group (3) are coaxially hinged to form a rotating joint (4); the lower end of the front foot group (1) is provided with a front wheel group (11) and a front wheel lock (6), the lower end of the rear foot group (2) is provided with a rear wheel group (21) and a rear wheel lock (7), and a joint lock (5) is provided in the rotating joint (4) to connect the front wheel lock (6) and the rear wheel lock (7), respectively, and characterized in that: a. When the stroller frame is unfolded, the handlebar assembly (3) is rotated to the same side as the rear foot assembly (2), the front wheel lock (6) is unlocked by the joint lock (5) and the rear wheel lock (7) is locked by the joint lock (5), the corresponding front wheel assembly (11) rotates in a universal direction and the rear wheel assembly (21) rolls in a directional manner; the handlebar assembly (3) is rotated to the same side as the front foot assembly (1), the front wheel lock (6) is locked by the joint lock (5) and the rear wheel lock (7) is unlocked by the joint lock (5), the corresponding front wheel assembly (11) rolls in a directional manner and the rear wheel assembly (21) rotates in a universal direction; the handlebar assembly (3) is rotated between the front foot assembly (1) and the rear foot assembly (2), the front wheel lock (6) and the rear wheel lock (7) are both unlocked by the joint lock (5), and the corresponding front wheel assembly (11) and the rear wheel assembly (21) both rotate in a universal direction; b. When the stroller frame is folded, the handlebar assembly (3), the front foot assembly (1) and the rear foot assembly (2) are folded and put together, the front wheel lock (6) and the rear wheel lock (7) are both locked by the joint lock (5), and the corresponding front wheel assembly (11) and the rear wheel assembly (21) are both directional and roll; c. The rotating joint (4) is formed by coaxially rotating and articulating a front rotating disk (41) at the upper end of the front foot group (1), a rear rotating disk (42) at the upper end of the rear foot group (2), and a lower rotating disk (43) at the lower end of the handle group (3); the joint lock (5) comprises a driving arc groove (51) and a reset arc groove (52) arranged on the lower rotating disk (43) with the rotating axis as the center of the circle, and also comprises a front slider (54) arranged on the front rotating disk (41) and sliding for lifting and lowering, and a rear slider (55) arranged on the rear rotating disk (42) and sliding for lifting and lowering; the outer diameter of the driving arc groove (51) is smaller than the outer diameter of the reset arc groove (52), and a climbing slope (53) connected to the driving arc groove (51) and the reset arc groove (52) is arranged between them; the front slider (54) is connected to the front wheel lock (6), and the rear slider (55) is connected to the rear wheel lock (7); the front slider (54) is provided with a The rear turntable (42) and the driving arc groove (51) or the reset arc groove (52) form a front slide column (541) that cooperates with the driving arc groove (51) or the reset arc groove (52); the rear slide block (55) is provided with a rear slide column (551) that cooperates with the driving arc groove (51) or the reset arc groove (52); the rear turntable (42) is provided with a travel groove (422) for the front slide column (541) to pass through, and the front slide column (541) can be driven to and fro in the travel groove (422) when the baby stroller frame is unfolded or folded; the front turntable (41) is provided with a front slide groove (411) extending along the diameter line of the front turntable; the front slide block (54) is mounted in the front slide groove (411) and can be lifted and slid; the rear turntable (42) is provided with a rear slide groove (421) extending along the diameter line of the rear turntable; the rear slide block (55) is mounted in the rear slide groove (421) and can be lifted and slid; A locking tooth (44) is provided between the lower rotating disk (43) and the rear rotating disk (42). When the baby stroller frame is unfolded, the locking tooth (44) is elastically pushed and inserted between the lower rotating disk (43) and the rear rotating disk (42) to form a lock. A handle (31) for driving the locking tooth (44) to separate from the lower rotating disk (43) is provided on the handle assembly (3). A locking block (45) is provided between the rear rotating disk (42) and the front rotating disk (41). When the baby stroller frame is unfolded, the locking block (45) is elastically pushed and inserted between the rear rotating disk (42) and the front rotating disk (41) to form a lock. When the baby stroller frame is folded, the handle assembly (3) is folded and closed relative to the front foot assembly (1) or the rear foot assembly (2), and drives the locking block (45) to slide along the driving arc groove (51). The locking block (45) separates from the front rotating disk (41), and the rear rotating disk (42) and the front rotating disk (41) are unlocked.

2. The improved folding frame of a baby stroller according to claim 1, characterized in that When the stroller frame is unfolded, the handlebar assembly (3) rotates to the same side as the rear foot assembly (2), and drives the front slider (54) to slide along the driving arc groove (51) and the rear slider (55) to slide along the reset arc groove (52). The front slider (54) moves upward to unlock the front wheel lock (6) and the rear slider (55) moves downward to lock the rear wheel lock (7). The corresponding front wheel assembly (11) rotates universally and the rear wheel assembly (21) rolls in a directional manner. The handlebar assembly (3) rotates to the same side as the front foot assembly (1), and drives the front slider (54) to slide along the reset arc groove (52) and the rear slider (55) to slide along the driving arc groove (52). The front slider (54) moves downward to lock the front wheel lock (6) and the rear slider (55) moves upward to unlock the rear wheel lock (7), and the corresponding front wheel group (11) rolls in a directional manner and the rear wheel group (21) rotates in a universal direction; the handlebar group (3) rotates between the front foot group (1) and the rear foot group (2) and drives the front slider (54) and the rear slider (55) to slide along the driving arc groove (51), and the front slider (54) and the rear slider (55) both move upward to unlock the front wheel lock (6) and the rear wheel lock (7), and the corresponding front wheel group (11) and the rear wheel group (21) both rotate in a universal direction.

3. The improved folding baby stroller frame according to claim 1, characterized in that When the baby stroller frame is folded, the handlebar assembly (3), the front foot assembly (1) and the rear foot assembly (2) are folded and brought together, driving the front slider (54) and the rear slider (55) to slide along the reset arc groove (52). The front slider (54) and the rear slider (55) are moved downward to lock the front wheel lock (6) and the rear wheel lock (7), and the corresponding front wheel assembly (11) and the rear wheel assembly (21) are both directed to roll.

4. The improved folding baby stroller frame according to claim 1, characterized in that The front wheel lock (6) comprises a front locking rod (61) arranged at the lower end of the front foot group (1) and elastically pushed and moved downward, and a front locking hole (64) arranged on the front wheel group (11) and matched with the front locking rod (61), and a front pull rope (63) connected to the front locking rod (61) is arranged between the front locking rod (61) and the front slider (54); the rear wheel lock (7) comprises a rear locking rod (71) arranged at the lower end of the rear foot group (2) and elastically pushed and moved downward, and a rear locking hole (74) arranged on the rear wheel group (21) and matched with the rear locking rod (71), and a rear pull rope (73) connected to the rear locking rod (71) is arranged between the rear locking rod (71) and the rear slider (55).

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