A stroller frame and a stroller having the same

Abstract

The present application belongs to the technical field of children's products, and relates to a stroller frame and a stroller with the same. A driving assembly is arranged in a backrest support, a first folding joint is arranged between the front leg support and the backrest support, a second folding joint is arranged between the front leg support and the rear leg support, and a first follower is connected between the first folding joint and the second folding joint. The inside width of the rear leg support is greater than the outside width of the backrest support and the front leg support. The driving assembly is used for unlocking the first folding joint, the backrest support can be rotated towards the front leg support, the backrest support is rotated from a backrest unfolded position to a backrest folded position, the second folding joint is further unlocked through the first follower, the rear leg support can be rotated towards the front leg support, the rear leg support is rotated from a rear leg unfolded position to a rear leg folded position, and the stroller frame can be folded as much as possible, so that the folded volume is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of children's products, and more particularly to a stroller frame and a stroller having the stroller frame. Background Technology

[0002] Strollers are a baby's "transportation tool," requiring someone to push or pull them along. In the market, strollers can be broadly categorized by function into luxury models suitable for general home use and extended outings, lightweight models suitable for frequent outings, and tricycles designed for caregivers' outdoor activities.

[0003] A stroller frame typically consists of a backrest and a base connected to the backrest. Wheels are mounted on the base. Existing stroller frames are generally stored by folding the backrest relative to the base. However, even after folding the backrest and base, the overall size of the frame is still quite large and takes up a lot of space. When a guardian needs to carry the stroller, they usually need to store the folded support frame in the trunk of their car. However, existing stroller frames are still quite bulky when folded, making them inconvenient for guardians to carry and use when going out.

[0004] This invention was proposed in response to the shortcomings of existing technologies. Summary of the Invention

[0005] This invention addresses the problem that existing stroller support frames, as mentioned above, are generally folded and stored by folding back against the base. However, even after folding back against the base, the overall size of the support frame is still large and occupies a lot of space. This invention proposes a stroller frame and a stroller with the stroller frame.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A stroller frame includes: a backrest support with a drive assembly, the backrest support having an extended backrest position and a retracted backrest position; a rear leg support located below the backrest support, the rear leg support having an extended rear leg position and a retracted rear leg position; and a front leg support with a first folding joint between the front leg support and the backrest support, and a second folding joint between the front leg support and the rear leg support, the first folding joint and the second folding joint being connected by a first follower; the inner width of the rear leg support is greater than the outer width of the backrest support and the front leg support; the drive assembly is used to unlock the first folding joint, the backrest support can rotate relative to the front leg support via the first folding joint to rotate from the extended backrest position to the retracted backrest position, and the second folding joint is further unlocked via the first follower, the rear leg support can rotate relative to the front leg support via the second folding joint to rotate from the extended rear leg position to the retracted rear leg position.

[0008] As described above, in a stroller frame, when the backrest support is in the extended backrest position and the rear leg support is in the extended rear leg position, there is an angle between the backrest support and the rear leg support; when the backrest support is in the folded backrest position and the rear leg support is in the folded rear leg position, the backrest support and the rear leg support are approximately parallel.

[0009] As described above, in a stroller frame, the first folding joint includes a first connecting bracket connected to the backrest bracket, a second connecting bracket connected to the front leg bracket, and a first transmission assembly disposed between the first and second connecting brackets. A first rotating part is provided between the first and second connecting brackets. The first transmission assembly is connected to the driving assembly and the first driven member respectively. The first transmission assembly is unlocked by the driving assembly, and the first connecting bracket can rotate relative to the second connecting bracket to drive the backrest bracket to rotate and fold towards the front leg bracket. At the same time, the first transmission assembly drives the first driven member to move, thereby further unlocking the second folding joint through the first driven member.

[0010] As described above, in a children's stroller frame, the first transmission assembly includes a fixed slider slidably mounted in a first connecting bracket and a rotating slider rotatably mounted in a second connecting bracket. One end of the fixed slider has a boss, and the other end is connected to the rotating slider. A first driven member is connected to the rotating slider. The first connecting bracket has a first slot and a first rotating groove adapted to the boss, and a second rotating groove located on one side of the first rotating groove and adapted to the rotating slider. The first rotating groove communicates with the first slot. The fixed slider moves within the first connecting bracket via the driving assembly, causing the boss to move relative to the first slot, so that the boss inserts into or disengages from the first slot. When the boss disengages from the first slot, it enters the first rotating groove and rotates along the first rotating groove via the driving assembly. The fixed slider drives the rotating slider to rotate within the second rotating groove, thereby moving the first driven member.

[0011] As described above, in a stroller frame, the second folding joint includes a third connecting bracket connected to the rear leg support, a fourth connecting bracket connected to the front leg support, and a second transmission assembly disposed between the third and fourth connecting brackets. A second rotating part is provided between the third and fourth connecting brackets. A first driven member is connected to the second transmission assembly. The first folding joint is unlocked by the driving assembly to drive the first driven member to move, thereby further unlocking the second transmission assembly by the first driven member, so that the third connecting bracket can rotate relative to the fourth connecting bracket and drive the rear leg support to rotate and fold towards the front leg support.

[0012] In the stroller frame described above, the second transmission assembly includes a first locking pin slidably connected to a third connecting bracket and a second locking pin retractably connected to the third connecting bracket. The third connecting bracket has a second locking groove adapted to the first locking pin, and the fourth connecting bracket has a third locking groove adapted to the second locking pin. The first locking pin is driven by a first driven member to insert or disengage from the second locking groove. When the first locking pin disengages from the second locking groove, the third connecting bracket can rotate relative to the fourth connecting bracket via a second rotating part, thereby causing the rear leg bracket to rotate and retract relative to the front leg bracket. The second locking pin rotates through the third connecting bracket to insert into the third locking groove, thereby fixing the rear leg bracket in the retracted rear leg position.

[0013] As described above, in a stroller frame, the third slot is provided with a first guide portion. The first guide portion is used to guide the second locking pin to disengage from the third slot, so that the third connecting bracket can rotate relative to the second connecting bracket, and drive the rear leg bracket to rotate relative to the front leg bracket from the rear leg folded position to the rear leg unfolded position.

[0014] As described above, in a stroller frame, the drive assembly includes an operating member and a second driven member. The operating member is slidably mounted on the backrest support, and the second driven member is connected between the operating member and the first folding joint. The operating member drives the second driven member to move along the backrest support, thereby unlocking the first folding joint.

[0015] As described above, in a children's stroller frame, the fixed slider has a relief groove adapted to the first rotating part. The relief groove extends toward the boss. When the fixed slider moves within the first connecting bracket via the driving assembly, it causes the relief groove to slide or rotate relative to the first rotating part.

[0016] A children's vehicle with a frame includes a main body, the main body of which includes the frame as described above.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The stroller frame is used in strollers. The back support can be folded and folded relative to the front support, and the rear support can also be folded and folded relative to the front support. By setting the inner width of the rear support to be greater than the outer width of the back support and the front support, the stroller frame can be folded and folded as much as possible, thereby reducing the overall folded size of the stroller frame and further saving storage space for users. This makes it easier for users to store the folded stroller frame in their car, making it convenient for users to take the stroller frame with them when going out, thus optimizing the user experience.

[0019] 2. The first folding joint is unlocked and driven by the drive component, which in turn drives the driven component to unlock and drive the second folding joint, so that the back support and the rear leg support can rotate and fold toward the rear leg support. The above structure has strong linkage, is simple to operate, and is easy for users to use.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the stroller frame of the present invention when unfolded;

[0022] Figure 2 This is a schematic diagram of the stroller frame of the present invention when folded and stowed.

[0023] Figure 3 This is a side view of the stroller frame of the present invention when unfolded;

[0024] Figure 4 This is a side view of the stroller frame of the present invention when folded and stowed.

[0025] Figure 5 This is a front view of the stroller frame of the present invention when unfolded;

[0026] Figure 6 This is a schematic diagram showing the connection of the drive assembly and the first folding joint in the stroller frame of the present invention.

[0027] Figure 7 The explosion of the drive assembly and the first folding joint in the stroller frame of the present invention Figure 1 ;

[0028] Figure 8 The explosion of the drive assembly and the first folding joint in the stroller frame of the present invention Figure 2 ;

[0029] Figure 9 Explosion of the second folding joint in the stroller frame of the present invention Figure 1 ;

[0030] Figure 10 Explosion of the second folding joint in the stroller frame of the present invention Figure 2 ;

[0031] Figure 11 This is a schematic diagram of the main body of the stroller of the present invention when unfolded (including the child carrier);

[0032] Figure 12 This is a schematic diagram of the main body of the stroller of the present invention when folded and stowed (including the child carrier). Detailed Implementation

[0033] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0034] like Figure 1 As shown in Figure 12, the stroller frame provided by the present invention includes a backrest support 1, in which a drive assembly 11 is provided, and the backrest support 1 has a backrest extended position and a backrest folded position; a rear leg support 2, located below the backrest support 1, and having a rear leg extended position and a rear leg folded position; and a front leg support 3, with a first folding joint 4 between the front leg support 3 and the backrest support 1, and a second folding joint 5 between the front leg support 3 and the rear leg support 2, wherein a first folding joint 4 is connected to the second folding joint 5. Follower 6; the inner width of the rear foot support 2 is greater than the outer width of the back support 1 and the front foot support 3; the drive assembly 11 is used to unlock the first folding joint 4, the back support 1 can rotate relative to the front foot support 3 through the first folding joint 4, so that the back support 1 can rotate from the back-open position to the back-closed position, and further unlock the second folding joint 5 through the first follower 6, the rear foot support 2 can rotate relative to the front foot support 3 through the second folding joint 5, so that the rear foot support 2 can rotate from the rear foot open position to the rear foot closed position.

[0035] In this embodiment, the stroller frame is mainly used in strollers. The stroller frame can be fitted with carriers such as child seats and cradles for children's use. The stroller frame is generally divided into a backrest support 1, a rear leg support 2, and a front leg support 3. The front leg support 3 is connected to both the backrest support 1 and the rear leg support 2. After assembly, the backrest support 1 is positioned above the rear leg support 2. Figure 1 As shown in Figure 4, Figure 1 The backrest support 1 is in the backrest extended position and the rear leg support 2 is in the rear leg extended position. Figure 2The backrest support 1 is in the folded position and the rear leg support 2 is in the folded position. When the backrest support 1 is in the unfolded position and the rear leg support 2 is in the unfolded position, both the first folding joint 4 and the second folding joint 5 are locked, restricting the rotation of the backrest support 1 and the rear leg support 2 relative to the front leg support 3. This ensures the stability of the stroller frame during use and prevents the backrest support 1 and the rear leg support 2 from being accidentally folded or folded due to misoperation, thus ensuring the safety of children. When the user needs to fold and store the stroller frame, the user can manually drive the drive assembly 11 to unlock the first folding joint 4. Through manual drive, the backrest support 1 rotates downward relative to the front leg support 3 via the first folding joint 4, thereby allowing the backrest support 1 to move from the unfolded position. When the backrest support 1 is rotated to the folded position, it is close to the front leg support 3 and located above it. During the folding process of the backrest support 1, the first driven member 6 is driven by the first folding joint 4 to move among the backrest support 1, the front leg support 3, and the rear leg support 2, so that the second folding joint 5 is unlocked. The user can manually drive the rear leg support 2 to rotate upward relative to the front leg support 3 through the second folding joint 5, thereby rotating the rear leg support 2 from the rear leg extended position to the rear leg folded position. When the rear leg support 2 is in the rear leg folded position, it is close to the front leg support 3 and located below it, so that the entire stroller frame is completely folded and folded. Figure 3 As shown, Figure 3 In the diagram, H1 represents the rotation direction when the back support 1 is folded and folded, and H2 represents the rotation direction when the rear support 2 is folded and folded. The back support 1 can be folded and folded relative to the front support 3, and the rear support 2 can be folded and folded relative to the front support 3. Figure 5As shown, by setting the inner width S1 of the rear leg support 2 to be greater than the outer width S2 of the backrest support 1 and the outer width S3 of the front leg support 3, and more preferably, the inner width S4 of the backrest support 1 to be greater than the outer width S3 of the front leg support 3, the stroller frame can be folded and folded as much as possible, thereby reducing the overall folded volume of the stroller frame and further saving storage space for the user. This makes it easier for the user to store the folded stroller frame in the car, allowing the user to carry the stroller frame out for use at any time, thus optimizing the user experience. Moreover, by unlocking the first folding joint 4 through the drive component 11, the first folding joint 4 drives the first driven member 6 to further unlock the second folding joint 5, allowing the backrest support 1 and the rear leg support 2 to rotate and fold towards the front leg support 3 respectively. The operation is simple and convenient for the user. In addition, preferably, the first driven member 6 is a pull rope, and the pull rope is preferably a steel rope. Steel rope is a common transmission structure in stroller frames, which is safe, reliable, and durable.

[0036] Preferred, such as Figure 1 As shown in Figure 4, when the backrest support 1 is in the extended backrest position and the rear leg support 2 is in the extended rear leg position, there is an angle 7 between the backrest support 1 and the rear leg support 2; when the backrest support 1 is in the retracted backrest position and the rear leg support 2 is in the retracted rear leg position, the backrest support 1 and the rear leg support 2 are approximately parallel. In this embodiment, Figure 3 and Figure 4 In the diagram, dashed line L1 represents the support axis L1 of the backrest bracket 1, and dashed line L2 represents the support axis L2 of the rear leg bracket 2. When the backrest bracket 1 is in the backrest extended position and the rear leg bracket 2 is in the rear leg extended position, the entire stroller frame is usable by the user. Figure 3 As shown, there is an angle 7 between the support axis L1 of the backrest 1 and the support axis L2 of the rear leg support 2. The angle 7 is designed according to ergonomic principles to make it more comfortable for the user to hold the backrest 1 and push the stroller. In this embodiment, the angle 7 is preferably an acute angle. Figure 3 In some embodiments, the backrest 1 or rear leg support 2 and the front leg support 3 form an obtuse angle. In other embodiments, the top of the backrest 1 may be provided with a handle 12 for the user to grip. A soft covering layer may be installed on the handle 12 to further enhance the user's comfort when gripping the backrest 1, thereby optimizing the user experience. Figure 2 and Figure 4As shown, when the backrest support 1 is in the folded backrest position and the rear leg support 2 is in the folded rear leg position, the backrest support 1 rotates towards the front leg support 3 via the first folding joint 4 to the folded backrest position. At this time, the backrest support 1 is folded up on the upper side of the front leg support 3 and close to the front leg support 3. The rear leg support 2 rotates towards the front leg support 3 via the second folding joint 5 to the folded rear leg position. At this time, the rear leg support 2 is folded up on the lower side of the front leg support 3 and close to the front leg support 3. Figure 4 As shown, the stroller frame is completely folded and stowed. At this time, the backrest support 1 is approximately parallel to the rear leg support 2. Figure 4 L1 and L2 are roughly parallel; through the above arrangement, the back support 1 and the rear foot support 2 can be folded and folded as much as possible, which improves the foldability of the stroller frame, so as to reduce the volume of the stroller frame after folding, thereby saving the user's storage space.

[0037] In some embodiments, such as Figure 6 As shown in Figure 8, the driving assembly 11 includes an operating member 111 and a second driven member 112. The operating member 111 is slidably mounted on the backrest bracket 1, and the second driven member 112 is connected between the operating member 111 and the first folding joint 4. The operating member 111 drives the second driven member 112 to move along the backrest bracket 1, thereby unlocking the first folding joint 4. In this embodiment, the backrest bracket 1 includes a handle 12 and connecting rods 13 connected to both sides of the handle 12. The operating member 111 is slidably sleeved in the connecting rod, and the second driven member 112 is slidably mounted along the length of the connecting rod 13. Limiting portions 131 can be provided on the upper and lower sides of the operating member 111. The operating member 111 can slide up and down relative to the connecting rod 13 under external force, and drive the second driven member 112 to slide up and down in the connecting rod 13, thereby unlocking and driving the first folding joint 4 through the second driven member 112. Further optimization Optionally, the operating component 111 is configured as a handle with an operating part, and the operating component 111 is located between the two limiting parts 131. The limiting parts 131 are used to limit the distance that the operating component 111 slides up and down relative to the connecting rod 13. The second driven component 112 is configured as a locking strip fixedly connected to the handle. The connecting rod 13 is provided with a groove that matches the locking strip. The moving direction of the locking strip is consistent with the moving direction of the handle. With the above-mentioned configuration of the driving component 11, the overall structure of the driving component 11 is simple, easy to manufacture and implement, and has a low production cost.

[0038] In some embodiments, such as Figure 6As shown in Figure 8, the first folding joint 4 includes a first connecting bracket 41 connected to the back support bracket 1, a second connecting bracket 42 connected to the front foot bracket 3, and a first transmission component 43 disposed between the first connecting bracket 41 and the second connecting bracket 42. A first rotating part 44 is provided between the first connecting bracket 41 and the second connecting bracket 42. The first transmission component 43 is connected to the driving component 11 and the first driven member 6 respectively. The first transmission component 43 is unlocked through the driving component 11, and the first connecting bracket 41 can rotate relative to the second connecting bracket 42 to drive the back support bracket 1 to rotate and retract toward the front foot bracket 3. At the same time, the first transmission component 43 drives the first driven member 6 to move, thereby further unlocking the second folding joint 5 through the first driven member 6. Furthermore, the first transmission assembly 43 includes a fixed slider 431 slidably mounted in the first connecting bracket 41 and a rotating slider 432 rotatably mounted in the second connecting bracket 42. One end of the fixed slider 431 has a boss 4311, and the other end is connected to the rotating slider 432. The first driven member 6 is connected to the rotating slider 432. The first connecting bracket 41 has a first slot 411 and a first rotating groove 412 adapted to the boss 4311, and a second rotating groove 413 located on one side of the first rotating groove 412 and adapted to the rotating slider 432. The rotating groove 412 communicates with the first slot 411. The fixed slider 431 moves within the first connecting bracket 41 via the driving assembly 11, thereby causing the boss 4311 to move relative to the first slot 411, so that the boss 4311 can be inserted into or disengaged from the first slot 411. When the boss 4311 disengages from the first slot 411, it enters the first rotating groove 412 and rotates along the first rotating groove 412 via the driving assembly 11. The fixed slider 431 drives the rotating slider 432 to rotate within the second rotating groove 413, thereby causing the first driven member 6 to move. Furthermore, the fixed slider 431 is provided with a clearance groove 4312 adapted to the first rotating part 44. The clearance groove 4312 extends toward the boss 4311. When the fixed slider 431 moves within the first connecting bracket 41 via the driving assembly 11, it causes the clearance groove 4312 to slide or rotate relative to the first rotating part 44.

[0039] In this embodiment, the first connecting bracket 41 and the second connecting bracket 42 are detachably connected to the backrest bracket 1 and the front leg bracket 3, respectively. After assembly, the first connecting bracket 41 and the second connecting bracket 42 have an inner cavity to accommodate the fixed slider 431 and the rotating slider 432. When the backrest bracket 1 is in the backrest unfolded position, the boss 4311 is inserted into the first slot 411, fixing the fixed slider 431 and restricting the backrest bracket 1 from rotating and retracting towards the front leg bracket 3 via the drive assembly 11, thus ensuring the unfolding of the backrest bracket 1 and ensuring the safety of children. When the drive assembly 11 drives the fixed slider 431 to move upward in the inner cavity, the fixed slider 431 is fixed. The slider 431 drives the boss 4311 to move upward within the first slot 411, and simultaneously drives the clearance groove 4312 to move upward relative to the first rotating part 44, so that the boss 4311 disengages from the first slot 411 and enters the first rotating groove 412. At this time, the driving assembly 11 continues to drive the fixed slider 431 to move upward, so that the boss 4311 rotates along the first sliding groove toward the rotating part 44, and simultaneously drives the clearance groove 4312 to rotate relative to the first rotating part 44 toward the rotating slider 432, so that the fixed slider 431 can drive the rotating slider 432 to rotate within the second rotating groove 413, and through the rotation and sliding, drive the first driven member 6 relative to the rear foot. The bracket 2 moves upward so that the second folding joint 5 can be unlocked and driven by the first follower 6; when the boss 4311 disengages from the first slot 411 and enters the first rotating slot 412, the back support bracket 1 can rotate and retract relative to the front leg bracket 3 under external force through the first rotating part 44; when the back support bracket 1 is in the back-retracted position, the back support bracket 1 can rotate away from the front leg bracket 3 to the back-open position under external force. During this rotation, the first connecting bracket 41 rotates relative to the second connecting bracket 42, and the clearance slot 4312 rotates relative to the first rotating part 44 in the same direction, so as to drive the fixed slider 431 in the first rotating slot 412. Rotate in the same direction until aligned with the first slot 411, and insert the boss 4311 into the first slot 411 to fix the backrest bracket 1. With the above configuration, the first folding joint 4 has a simple structure, is easy to manufacture and implement, and has strong linkage. It is connected to the first driven member 6 through the rotating slider 432 to drive the second folding joint 5. The design associates the unlocking structure of the backrest bracket 1 and the rear foot bracket 2, which simplifies the overall structure of the backrest bracket 1 and the rear foot bracket 2. The design is ingenious. Users only need to manually drive the drive component 11 to fold and retract the backrest bracket 1 and the rear foot bracket 2 through the first folding joint 4 and the second folding joint 5. The operation is simple and further optimizes the user experience.In some embodiments, the fixed slider 431 is connected to the second follower 112, so that the fixed slider 431 can move between the first connecting bracket 41 and the second connecting bracket 42 through the second follower 112; in some embodiments, the first rotating part 44 includes a rotating column provided in the first connecting bracket 41 and a rotating hole provided in the second connecting bracket 42, and the rotating column and the rotating hole are rotatably connected to each other, so that the first connecting bracket 41 can rotate relative to the second connecting bracket 42.

[0040] In some embodiments, such as Figure 9 and Figure 10 As shown, the second folding joint 5 includes a third connecting bracket 51 connected to the rear leg bracket 2, a fourth connecting bracket 52 connected to the front leg bracket 3, and a second transmission assembly 53 disposed between the third connecting bracket 51 and the fourth connecting bracket 52. A second rotating part 54 is provided between the third connecting bracket 51 and the fourth connecting bracket 52. The first driven member 6 is connected to the second transmission assembly 53. The first folding joint 4 is unlocked by the driving assembly 11 to drive the first driven member 6 to move, thereby further unlocking the second transmission assembly 53 by the first driven member 6, so that the third connecting bracket 51 can rotate relative to the fourth connecting bracket 52, and drive the rear leg bracket 2 to rotate and fold towards the front leg bracket 3. Furthermore, the second transmission assembly 53 includes a first locking pin 531 slidably connected in the third connecting bracket 51 and a second locking pin 532 telescopically connected in the third connecting bracket 51. The third connecting bracket 51 has a second locking groove 511 adapted to the first locking pin 531, and the fourth connecting bracket 52 has a third locking groove 521 adapted to the second locking pin 532. The first locking pin 531 is driven by the first driven member 6, causing the first locking pin 531 to insert into or disengage from the second locking groove 511. When the first locking pin 531 disengages from the second locking groove 511, the third connecting bracket 51 can rotate relative to the fourth connecting bracket 52 via the second rotating part 54, thereby driving the rear leg bracket 2 to rotate and retract relative to the front leg bracket 3. The second locking pin 532 rotates through the third connecting bracket 51 to insert into the third locking groove 521, thereby fixing the rear leg bracket 2 in the rear leg retracted position.

[0041] In this embodiment, the third connecting bracket 51 and the fourth connecting bracket 52 are detachably connected to the rear foot bracket 2 and the front foot bracket 3. One end of the first follower 6 is connected to the rotating slider 432, and the other end is connected to the first locking pin 531. When the rear foot bracket 2 is in the rear foot unfolded position, the first locking pin 531 is inserted into the second locking groove 511 to lock the second folding joint 5, thereby restricting the third connecting bracket 51 from rotating relative to the fourth connecting bracket 52 through the second rotating part 54, so that the rear foot... The bracket 2 is fixed at the unfolded position of the rear leg to ensure the normal use of the stroller frame. When the first driven member 6 moves upward in the rear leg bracket 2 via the rotating slider 432, the first driven member 6 drives the first locking pin 531 to move away from the third connecting bracket 51 in the second locking groove 511, so that the first locking pin 531 disengages from the second locking groove 511 and unlocks the second folding joint 5. At this time, the rear leg bracket 2 is subjected to external force, which can drive the third connecting bracket 51 to move relative to the fourth connecting bracket 5 via the second rotating part 54. 2. Rotate to make the rear foot support 2 rotate toward the front foot support 3 to the rear foot folded position, thereby realizing the folding and folding of the rear foot support 2 relative to the front foot support 3. The second folding joint 5 has a simple overall structure and is easy to operate. The second folding joint 5 is connected to the first folding joint 4 through the first follower 6. By associating the unlocking structure in the back support 1 and the rear foot support 2, the linkage between the first folding joint 4 and the second folding joint 5 is strong and cleverly designed. The user only needs to manually drive the drive component 11 to fold and fold the back support 1 and the rear foot support 2 through the first folding joint 4 and the second folding joint 5. The operation is simple and further optimizes the user experience. During the folding and folding process of the rear foot support 2, the third connecting bracket 51 drives the second locking pin 532 to rotate and engage with the third locking slot 521, thereby fixing the third connecting bracket 51 relative to the fourth connecting bracket 52, so that the folded and folded rear foot support 2 is fixed in the rear foot folded position, preventing the rear foot support 2 from being unstable when folded and folded and easily unfolded, which would cause inconvenience to the user during transportation. In other embodiments, the second rotating part 54 includes a rotating cavity disposed in the third connecting bracket 51 and a rotating shaft disposed in the fourth connecting bracket 52. The rotating shaft is rotatably connected to the rotating cavity. More preferably, the fourth connecting bracket 52 is provided with a limiting block 5212, which is used to limit the rotation angle of the third connecting bracket 51 relative to the fourth connecting bracket 52.

[0042] Furthermore, the third slot 521 is provided with a first guide portion 5211, which guides the second locking pin 532 to disengage from the third slot 521, so that the third connecting bracket 51 can rotate relative to the second connecting bracket 42, and drive the rear leg bracket 2 to rotate relative to the front leg bracket 3 from the rear leg folded position to the rear leg unfolded position. Figure 9 and Figure 10 As shown, in this embodiment, the first guide portion 5211 is preferably configured as an annular inner chamfer portion located in the third slot 521, and the third connecting bracket 51 is provided with a return spring connected to the second locking pin 532. When the second locking pin 532 is engaged and fixed with the third slot 521, the rear leg bracket 2 can be driven by external force to rotate the second locking pin 532 away from the front leg bracket 3, and the first guide portion 5211 pushes the second locking pin 532 away from the third slot 521. At the same time, the second locking pin 532 squeezes the return spring so that the second locking pin 532 can disengage from the third slot 521, thereby realizing the rotation of the rear leg bracket 2 to the rear leg unfolded position for user use; further preferably, the end of the second locking pin 532 can also be provided with an annular outer chamfer portion corresponding to the first guide portion 5211 to enhance the guiding movement effect of the first guide portion 5211 on the second locking pin 532.

[0043] The present invention also provides a stroller with a stroller frame, including a stroller body 8, wherein the stroller body 8 includes the stroller frame as described above. Figure 1 , 11 As shown in Figures 1 and 12, in this embodiment, front feet bracket 3 is provided with front feet wheels 82 on both sides, and rear feet bracket 2 is provided with rear feet wheels 83 on both sides. The stroller body 8 is detachably equipped with a child carrier 81 for carrying children, such as a child seat or a child carrier, to facilitate users to take children out.

[0044] The above examples are merely illustrative of the technical content of the present invention to facilitate easier understanding by the reader, but do not imply that the implementation of the present invention is limited to these examples. Any technical extensions or re-creations made based on the present invention are protected by the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A children's stroller frame, characterized in that, include: A backrest support (1) is provided with a drive assembly (11), and the backrest support (1) has a backrest unfolded position and a backrest folded position; The rear foot support (2) is located below the back support (1) and has a rear foot extended position and a rear foot retracted position. A front foot support (3) is provided with a first folding joint (4) between the front foot support (3) and the back support (1), and a second folding joint (5) is provided between the front foot support (3) and the rear foot support (2). A first follower (6) is connected between the first folding joint (4) and the second folding joint (5). The inner width of the rear foot bracket (2) is greater than the outer width of the back support bracket (1) and the front foot bracket (3); The drive assembly (11) is used to unlock the first folding joint (4). The back support (1) can rotate relative to the front foot support (3) through the first folding joint (4) so ​​that the back support (1) rotates from the back-open position to the back-closed position. The second folding joint (5) is further unlocked through the first follower (6). The rear foot support (2) can rotate relative to the front foot support (3) through the second folding joint (5) so that the rear foot support (2) rotates from the rear foot open position to the rear foot closed position. The second folding joint (5) includes a third connecting bracket (51) connected to the rear foot bracket (2), a fourth connecting bracket (52) connected to the front foot bracket (3), and a second transmission component (53) disposed between the third connecting bracket (51) and the fourth connecting bracket (52). The first driven member (6) is connected to the second transmission component (53). The first folding joint (4) is unlocked by the drive component (11) to drive the first driven member (6) to move, thereby further unlocking the second transmission component (53) by the first driven member (6) so that the third connecting bracket (51) can rotate relative to the fourth connecting bracket (52) and drive the rear foot bracket (2) to rotate and fold towards the front foot bracket (3). The second transmission assembly (53) includes a first locking pin (531) slidably connected in a third connecting bracket (51). The third connecting bracket (51) is provided with a second locking groove (511) adapted to the first locking pin (531). The first locking pin (531) is driven by the first follower (6) to insert or disengage the first locking pin (531) from the second locking groove (511). A second rotating part (54) is provided between the third connecting bracket (51) and the fourth connecting bracket (52). When the first locking pin (531) disengages from the second locking groove (511), the third connecting bracket (51) can rotate relative to the fourth connecting bracket (52) through the second rotating part (54) to drive the rear leg bracket (2) to rotate and retract relative to the front leg bracket (3).

2. A stroller frame as described in claim 1, characterized in that, When the backrest support (1) is in the backrest extended position and the rear leg support (2) is in the rear leg extended position, there is an angle (7) between the backrest support (1) and the rear leg support (2); when the backrest support (1) is in the backrest closed position and the rear leg support (2) is in the rear leg closed position, the backrest support (1) and the rear leg support (2) are approximately parallel.

3. A stroller frame as described in claim 1 or 2, characterized in that, The first folding joint (4) includes a first connecting bracket (41) connected to the back support bracket (1), a second connecting bracket (42) connected to the front foot bracket (3), and a first transmission component (43) disposed between the first connecting bracket (41) and the second connecting bracket (42). A first rotating part (44) is provided between the first connecting bracket (41) and the second connecting bracket (42). The first transmission component (43) is connected to the driving component (11) and the first driven member (6) respectively. The first transmission component (43) is unlocked by the driving component (11). The first connecting bracket (41) can rotate relative to the second connecting bracket (42) to drive the back support bracket (1) to rotate and retract toward the front foot bracket (3). At the same time, the first transmission component (43) drives the first driven member (6) to move, thereby further unlocking the second folding joint (5) through the first driven member (6).

4. A stroller frame as described in claim 3, characterized in that, The first transmission assembly (43) includes a fixed slider (431) slidably mounted in the first connecting bracket (41) and a rotating slider (432) rotatably mounted in the second connecting bracket (42). One end of the fixed slider (431) has a boss (4311), and the other end is connected to the rotating slider (432). The first driven member (6) is connected to the rotating slider (432). The first connecting bracket (41) has a first slot (411) and a first rotating groove (412) adapted to the boss (4311), and a second rotating groove (413) located on one side of the first rotating groove (412) and adapted to the rotating slider (432). 412) is connected to the first slot (411). The fixed slider (431) moves in the first connecting bracket (41) through the driving component (11) to drive the boss (4311) to move relative to the first slot (411) so that the boss (4311) can be inserted into or removed from the first slot (411). When the boss (4311) is removed from the first slot (411), it enters the first rotating groove (412) and rotates along the first rotating groove (412) through the driving component (11). The fixed slider (431) drives the rotating slider (432) to rotate in the second rotating groove (413) so as to drive the first follower (6) to move.

5. A stroller frame as described in claim 1 or 2, characterized in that, The second transmission assembly (53) further includes a second locking pin (532) that is telescopically connected to the third connecting bracket (51), and the fourth connecting bracket (52) is provided with a third locking groove (521) that is adapted to the second locking pin (532); the second locking pin (532) is rotated through the third connecting bracket (51) to be inserted into the third locking groove (521) so that the rear foot bracket (2) is fixed in the rear foot retracted position.

6. A stroller frame as described in claim 5, characterized in that, The third slot (521) is provided with a first guide part (5211), which is used to guide the second locking pin (532) to disengage from the third slot (521).

7. A stroller frame as described in claim 1 or 2, characterized in that, The drive assembly (11) includes an operating member (111) and a second follower (112). The operating member (111) is slidably mounted on the back support (1), and the second follower (112) is connected between the operating member (111) and the first folding joint (4). The operating member (111) drives the second follower (112) to move along the back support (1) so that the second follower (112) unlocks the first folding joint (4).

8. A stroller frame as described in claim 4, characterized in that, The fixed slider (431) is provided with a relief groove (4312) that is adapted to the first rotating part (44). The relief groove (4312) extends toward the boss (4311). When the fixed slider (431) moves in the first connecting bracket (41) through the driving assembly (11), it drives the relief groove (4312) to slide or rotate relative to the first rotating part (44).

9. A children's vehicle with a frame, comprising a main body (8), characterized in that, The stroller body (8) includes the stroller frame as described in any one of claims 1 to 8.

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