Stroller frame

Abstract

A connecting base is fixedly arranged at the upper end of a rear supporting rod, a first connecting part is fixedly arranged at the upper end of a front supporting rod, a second connecting part is fixedly arranged at the lower end of a push rod assembly, a connector is arranged on the inner side of the connecting base, the first connecting part is in pivot joint with the connecting base, and the second connecting part is in pivot joint with the connecting base. A linkage rod is arranged between the first connecting part and the second connecting part, a clamping and locking piece is arranged in the connecting base, and clamping positions capable of being clamped with or separated from the clamping and locking piece are arranged on the first connecting part and the second connecting part. The clamping and locking piece is provided with an unlocking block which is exposed out of the connecting base and can be pushed by the seat portion of the seat assembly to enable the clamping and locking piece to be separated from the clamping position when the seat assembly rotates and is folded relative to the front supporting rod, and the rear supporting rod is further provided with an exposed handle which can pull the clamping and locking piece to be separated from the clamping position when the seat assembly is separated from the connector. A first reset spring capable of pushing the clamping and locking piece to reset is arranged between the clamping and locking piece and the connecting base. The infant sleeping bag is simple in structure and can be used for committing or comforting infants.

Description

Technical Field

[0001] The utility model relates to a frame of a baby stroller.

Background Art

[0002] Baby strollers are common products in the growth process of infants and young children. Currently, general baby strollers can be unfolded or folded. In the unfolded state, they are used for children to ride and travel, and in the folded state, they are convenient for storage or carrying.

[0003] The Chinese utility model patent with the publication number CN221188720U is a prior patent applied by the applicant in 2023. This patent discloses a baby stroller. Its main technical solution is that when the seat rotates and folds relative to the mounting seat, it can drive the locking components between the front legs, rear legs, and struts to unlock, making the folding operation of the baby stroller convenient. However, the structure of this baby stroller has the following deficiencies: that is, it is not convenient to unlock the locking components after the seat is removed from the mounting seat because the exposed part of the unlocking piece that cooperates with the seat to unlock is very small and not large enough for an adult's finger to easily move. Moreover, in order to avoid interference or smoothness during the rotation and unfolding or rotation and folding of the seat, the size of this unlocking piece cannot be made large enough for an adult's finger to easily move. Therefore, this solution cannot meet the requirement of folding the front legs, rear legs, and struts separately and conveniently after the seat is removed. In fact, for infants, they are placed flat in the bassinet at birth. When traveling, the bassinet is installed on the frame and an adult pushes them. As the infants grow to a certain age, the bassinet is no longer suitable for children to travel, and a seat can be selected to be installed on the frame when traveling, and the child sits in the seat. However, when connecting the baby bassinet to the mounting seat in the aforementioned prior patent technical solution, since the baby bassinet cannot drive the locking components between the front legs, rear legs, and struts to unlock, and there are no other unlocking components that can operate the locking components to unlock separately, the aforementioned prior patent application technical solution is not suitable for connecting the baby bassinet to the frame, resulting in a small product application range.

[0004] Therefore, the present utility model is precisely generated based on the above deficiencies.

Content of the Utility Model

[0005] The purpose of the present utility model is to overcome the deficiencies of the prior art and provide a frame of a baby stroller with convenient unlocking and folding operations and a wide application range.

[0006] The present utility model is realized through the following technical solutions:

[0007] A stroller frame for children, comprising a push rod assembly, a front support rod and a rear support rod both connected with wheels. A connecting seat is fixedly provided at the upper end of the rear support rod. A first connecting part is fixedly provided at the upper end of the front support rod. A second connecting part is fixedly provided at the lower end of the push rod assembly. A connector capable of detachably connecting with a seat assembly is provided inside the connecting seat. The first connecting part is pivotally connected with the connecting seat. The second connecting part is pivotally connected with the connecting seat. A linkage rod pivotally connected with both of them and capable of driving the front support rod to rotate and fold towards the rear support rod when the push rod assembly rotates and folds relative to the rear support rod is provided between the first connecting part and the second connecting part. A locking member capable of sliding inside it is provided inside the connecting seat. Positioning slots capable of engaging with or disengaging from the locking member are provided on the first connecting part and the second connecting part. An unlocking block exposed outside the connecting seat and capable of being pushed by the seat part of the seat assembly to disengage the locking member from the positioning slot when the seat assembly rotates and folds relative to the front support rod is provided on the locking member. A handle exposed outside and capable of pulling the locking member to disengage from the positioning slot when the seat assembly is disengaged from the connector is further provided on the rear support rod. A first return spring capable of pushing the locking member to reset is provided between the locking member and the connecting seat.

[0008] The positioning slots include a first bayonet provided on the first connecting part and a second bayonet provided on the second connecting part. The locking member includes a body capable of sliding inside the connecting seat. A locking block capable of engaging with or disengaging from the first bayonet and the second bayonet is provided at the upper end of the body. An arc-shaped part extending towards one side of the body and protruding outside the connecting seat is provided on the body. The unlocking block is provided at one end of the arc-shaped part and is located below the connector. The handle includes a sliding seat capable of sliding along the rear support rod. A handle protruding towards one side is provided at the lower end of the sliding seat. A hook capable of being clamped with the arc-shaped part is provided at the upper end of the sliding seat.

[0009] A locking hole is provided on the arc-shaped part. The hook is clamped in the locking hole.

[0010] A sliding groove is provided on the rear support rod. A strip-shaped hole is provided on the sliding seat along its sliding direction. A limiting shaft passing through the strip-shaped hole and the groove wall of the sliding groove is provided on the rear support rod.

[0011] The seat assembly includes a mounting seat detachably connected with the connector. A seat part is rotatably connected to the mounting seat. A backrest part and an armrest part capable of rotating relative to it are provided on the seat part. A locking assembly capable of locking the seat assembly in the unfolded state is provided between the mounting seat, the seat part, the backrest part and the armrest part.

[0012] The seat portion includes a seat plate and an unlocking portion which is arranged on the seat plate and can push an unlocking block when the seat portion rotates relative to the mounting seat to cause the locking piece to disengage from the locking position. The unlocking portion includes an unlocking slider which is slidably connected to the seat plate and can push the unlocking block to slide when the seat portion rotates and is folded relative to the mounting seat. A resetting element which can push the unlocking slider to reset is also arranged between the unlocking slider and the seat plate. A first inclined surface is arranged on the unlocking slider, and a pushing surface is arranged on the unlocking block which can push the first inclined surface when the seat assembly is unfolded to cause the unlocking slider to retract into the seat plate.

[0013] A locking assembly capable of locking the two is provided between the mounting seat and the connector, the locking assembly includes a locking position provided on the connector, the mounting seat is provided with a locking block capable of sliding laterally relative to the locking block to engage in or disengage from the locking position, the mounting seat is also connected to an operating member capable of sliding vertically relative to the locking block to push the locking block to slide laterally, a first elastic element capable of pushing the locking block to return to its original position is provided between the locking block and the mounting seat, and a second elastic element capable of pushing the operating member to return to its original position is provided between the operating member and the mounting seat.

[0014] A position adjustment structure capable of adjusting the inclination position of the backrest relative to the seat portion is provided between the seat portion and the backrest portion, the position adjustment structure comprising a plurality of adjustment positions provided on the seat portion, a sliding member capable of sliding relative to the backrest portion is provided on the backrest portion, a snap-in portion capable of being snapped into the adjustment position is provided on the sliding member, an unlocking member capable of rotating relative thereto is provided on the backrest portion, a cable capable of connecting the unlocking member and the sliding member is provided between the unlocking member and the sliding member, and a second return spring capable of pushing the sliding member to return to its original position is provided between the sliding member and the backrest portion.

[0015] The seat portion is also provided with a stopper capable of preventing the sliding member from rotating forward, a two-way locking assembly is provided between the unlocking member and the backrest portion, the two-way locking assembly includes an unlocking button provided on the unlocking member, a protrusion is provided on the unlocking button, a making way groove is provided on the backrest portion for making way for the protrusion so that the cable pulls the sliding member out of the stopper, an elastic element capable of pushing the protrusion on the unlocking button to be misaligned with the making way groove is provided between the unlocking button and the backrest portion, and a movable space is provided between the protrusion and the backrest portion so that the cable can be pulled when the unlocking member rotates to unlock the gear adjustment structure.

[0016] The locking assembly includes a left connecting shell arranged on the seat portion and a right connecting shell arranged on the mounting seat, the left connecting shell and the right connecting shell both being provided with spline grooves, the left connecting shell and the right connecting shell forming a sealed space, the sealed space being provided with a spline which can move laterally therein and can simultaneously engage with the spline grooves on the left connecting shell and the right connecting shell, a third return spring is also provided between the spline and the right connecting shell, a pushing protrusion is provided on the backrest portion which can push the spline to slide laterally and disengage from the spline groove on the left connecting shell when the backrest portion is rotated and folded, a yield space which can accommodate the pushing protrusion is provided on the spline, a first pushing surface which can be pushed by the pushing protrusion is also provided in the yield space on the spline, a protruding bump is also provided on the spline, and a clamping groove which can be engaged with the bump to prevent the armrest portion from rotating and folding is provided on the armrest portion.

[0017] Compared with the prior art, the utility model has the following advantages: when the seat assembly is connected to the connector of the child stroller frame, the seat part can push the unlocking block when rotating and folding relative to the front support rod, so that the locking piece is separated from the locking position, and the front support rod, the rear support rod and the push rod assembly are mutually unlocked, and the child stroller frame can be folded as a whole. When the seat assembly is removed from the connector, the locking piece can also be unlocked from the locking position by pulling the handle, and the front support rod, the rear support rod and the push rod assembly are also mutually unlocked without the seat part driving, and the frame without the seat assembly can also be folded separately. Therefore, after the baby sleeping basket is connected to the connector, if the child stroller frame is to be folded, the baby sleeping basket can be removed first, and then the front support rod, the rear support rod and the push rod assembly can be unlocked by the handle, so that the frame without the seat assembly can be folded, which is convenient for storage and carrying. Therefore, the utility model can be folded as a whole when the seat assembly is connected, and the front support rod, the rear support rod and the push rod assembly can also be folded when the baby sleeping basket is connected, and the application range is wide, and the unlocking and folding operation is also very convenient and quick.

Brief Description of the Drawings

[0018] Figure 1 This is one of the three-dimensional images of the child stroller frame of the utility model after the seat assembly is removed;

[0019] Figure 2 This is the second stereoscopic view of the child stroller frame of the utility model after the seat assembly is removed;

[0020] Figure 3 yes Figure 2 Enlarged view of the middle E area;

[0021] Figure 4 It is one of the cross-sectional views of the components of the utility model;

[0022] Figure 5 This is the second cross-sectional view of the components of the utility model;

[0023] Figure 6 is one of the exploded views of the components of the present utility model;

[0024] Figure 7 is the second exploded view of the components of the present utility model;

[0025] Figure 8 is the side view of the present utility model in the unfolded state;

[0026] Figure 9 is the side view during the folding process of the present utility model;

[0027] Figure 10 is the perspective view of the present utility model when configuring the seat assembly;

[0028] Figure 11 is the first perspective view of the seat of the present utility model;

[0029] Figure 12 is the first exploded view of the seat of the present utility model;

[0030] Figure 13 is the second exploded view of the seat of the present utility model;

[0031] Figure 14 is the second perspective view of the seat of the present utility model;

[0032] Figure 15 is the perspective view of the spline of the present utility model;

[0033] Figure 16 is the first perspective view of the backrest of the present utility model;

[0034] Figure 17 is the second perspective view of the backrest of the present utility model;

[0035] Figure 18 is the perspective view of the present utility model when configuring the baby bassinet.

Detailed implementation manners

[0036] The present utility model will be further described below in conjunction with the accompanying drawings:

[0037] As Figures 1 to 18As shown in the figure, a stroller frame includes a push rod assembly 3, a front support rod 1 and a rear support rod 2 both connected with wheels 100. A connecting seat 21 is fixedly provided at the upper end of the rear support rod 2. A first connecting portion 11 is fixedly provided at the upper end of the front support rod 1. A second connecting portion 32 is fixedly provided at the lower end of the push rod assembly 3. A connector 22 capable of detachably connecting with a seat assembly 4 is provided inside the connecting seat 21. The first connecting portion 11 is pivotally connected with the connecting seat 21. The second connecting portion 32 is pivotally connected with the connecting seat 21. A linkage rod 5 pivotally connected with both of them and capable of driving the front support rod 1 to rotate and fold towards the rear support rod 2 when the push rod assembly 3 rotates and folds relative to the rear support rod 2 is provided between the first connecting portion 11 and the second connecting portion 32. A locking member 61 capable of sliding inside the connecting seat 21 is provided inside the connecting seat 21. Positioning slots 62 capable of engaging or disengaging with the locking member 61 are provided on the first connecting portion 11 and the second connecting portion 32. An unlocking block 63 exposed outside the connecting seat 21 and capable of being pushed by a seat portion 41 of the seat assembly 4 to disengage the locking member 61 from the positioning slot 62 when the seat assembly 4 rotates and folds relative to the front support rod 1 is provided on the locking member 61. An exposed handle 64 capable of pulling the locking member 61 to disengage from the positioning slot 62 when the seat assembly 4 is disengaged from the connector 22 is further provided on the rear support rod 2. A first return spring 65 capable of pushing the locking member 61 to reset is provided between the locking member 61 and the connecting seat 21.

[0038] As Figures 3 to 7 shown, when the stroller frame needs to be folded, the seat portion 41 can push the unlocking block 63 when rotating and folding relative to the front support rod 1, so that the locking member 61 is disengaged from the positioning slot 62. At this time, the front support rod 1, the rear support rod 2 and the push rod assembly 3 are unlocked from each other. When the user operates the push handle assembly 3 to rotate and approach the rear support 2, the front support rod 3 can be driven by the linkage rod 5 to rotate and approach the rear support rod 2, and the whole stroller frame can be folded. When the seat assembly 4 is detached from the connector 22, the user can also pull the handle 64 to unlock the locking member 661 from the positioning slot 62. At this time, without the drive of the seat portion 41, the front support rod 1, the rear support rod 2 and the push rod assembly 3 are also unlocked from each other. Then, by rotating the push rod assembly 3, the front support rod 1 can be driven by the linkage rod 5 to rotate and approach the rear support rod 2, and the frame without the seat assembly 4 can also be folded alone. Therefore, after connecting a baby bassinet 200 to the connector 22 (as Figure 18 ), if the stroller frame needs to be folded, the baby bassinet 200 can be removed first, and then the front support rod 1, the rear support rod 2 and the push rod assembly 3 can be unlocked by pulling the handle 64, so that the frame without the seat assembly 4 can be folded, which is convenient for storage and carrying. Therefore, it can be folded as a whole when connecting the seat assembly 4, and the front support rod 1, the rear support rod 2 and the push rod assembly 3 can also be folded when connecting the baby bassinet 200. It has a wide range of applications, and the unlocking and folding operations are very convenient and fast.

[0039] AsFigures 3 to 7 As shown, the card slot 62 includes a first bayonet 621 provided on the first connecting portion 11 and a second bayonet 622 provided on the second connecting portion 32. The locking member 61 includes a body 611 that can slide within the connecting seat 21. An upper end of the body 611 is provided with a locking block 612 that can engage with or disengage from the first bayonet 621 and the second bayonet 622. The body 611 is provided with an arc portion 613 that extends to one side thereof and protrudes outside the connecting seat 21. The unlocking block 63 is provided at one end of the arc portion 613 and is located below the connector 22. The handle 64 includes a sliding seat 641 that can slide along the rear support rod 2. A lower end of the sliding seat 641 is provided with a handle 642 that protrudes to one side thereof. An upper end of the sliding seat 641 is provided with a hook 643 that can be engaged with the arc portion 613. When there is no seat assembly 4 connected to the connector 22, a user can push the handle 642, and the handle 642 drives the sliding seat 641 to slide. The hook 643 on the sliding seat 641 pulls the arc portion 613, and the arc portion 613 drives the body 611 to move downward, thereby driving the locking block 612 to disengage from the first bayonet 621 and the second bayonet 622. The whole operation is very convenient and fast, and unlocking can be achieved just by pulling the handle 642 once.

[0040] As Figure 3 and Figure 7 shown, the arc portion 613 is provided with a card hole 614, and the hook 643 is stuck in the card hole 614, with a simple structure and convenient assembly.

[0041] As Figure 7 shown, the rear support rod 2 is provided with a sliding groove 23. The sliding seat 641 is provided with a strip hole 644 along its sliding direction. The rear support rod 2 is provided with a limiting shaft 24 that passes through the strip hole 644 and the groove wall of the sliding groove 23. The sliding seat 641 slides within the sliding groove 23, and the groove wall of the sliding groove 23 plays a guiding role. Moreover, the limiting shaft 24 is inserted into the strip hole 644 of the sliding seat 641, which can limit the sliding stroke of the sliding seat 641, facilitating the user to recognize that unlocking has been achieved when the sliding seat 641 is blocked and cannot slide further.

[0042] As Figures 11 to 14 shown, the seat assembly 4 includes a mounting seat 42 that is detachably connected to the connector 22. A seat portion 41 is rotatably connected to the mounting seat 42. A backrest portion 43 and an armrest portion 44 that can rotate relative thereto are provided on the seat portion 41. A locking assembly 45 that can lock the seat assembly 4 in the unfolded state is provided between the mounting seat 42, the seat portion 41, the backrest portion 43, and the armrest portion 44.

[0043] As Figures 11 to 14As shown, the seat portion 41 includes a seat board 411 and an unlocking portion 412 that is provided on the seat board 411 and can push against the unlocking block 63 when the seat portion 41 rotates relative to the mounting seat 42, so that the locking member 61 disengages from the engaging position 62. The unlocking portion 412 includes an unlocking slider 4121 that is slidably connected to the seat board 411 and can push the unlocking block 63 to slide when the seat portion 41 rotates and folds relative to the mounting seat 42. A reset element 4122 that can push the unlocking slider 4121 to reset is further provided between the unlocking slider 4121 and the seat board 411. A first inclined surface 4123 is provided on the unlocking slider 4121, and a pushing surface 631 that can push the first inclined surface 4123 when the seat assembly 4 is unfolded so that the unlocking slider 4121 retracts into the seat board 411 is provided on the unlocking block 63. When the seat assembly 4 rotates and folds relative to the mounting seat 42, the unlocking slider 4121 rotates with the seat board 411. The unlocking slider 4121 gradually abuts against the unlocking block 63 and pushes the unlocking block 63 to slide downward, so that the locking block 612 disengages from the first engaging opening 621 and the second engaging opening 622. When the seat assembly 4 needs to be rotated and unfolded, the seat board 411 is unfolded in the reverse direction. At this time, the first inclined surface 4123 on the unlocking slider 4121 gradually contacts the pushing surface 631 on the unlocking block 63, and retracts into the seat board 411 under the pushing of the pushing surface 631, giving way to the unlocking block 63 to avoid jamming between the unlocking block 63 and the unlocking slider 4121.

[0044] As Figures 11 to 13 shown, a locking assembly that can lock the mounting seat 42 and the connector 22 is provided between the mounting seat 42 and the connector 22. The locking assembly includes an engaging position 71 provided on the connector 22, and an engaging block 72 provided on the mounting seat 42 that can slide horizontally relative to it to engage with or disengage from the engaging position 71. An operating member 73 that can slide vertically relative to the mounting seat 42 to push the engaging block 72 to slide horizontally is further connected to the mounting seat 42. A first elastic element 74 that can push the engaging block 72 to reset is provided between the engaging block 72 and the mounting seat 42, and a second elastic element 75 that can push the operating member 73 to reset is provided between the operating member 73 and the mounting seat 42. The mounting seat 42 and the connector 22 are locked by the locking assembly, which facilitates the quick installation of the mounting seat 42 onto the connector 22. At the same time, when it is necessary to remove and separate the seat assembly 4, only the operating member 73 needs to be pressed. When the operating member 73 is pressed, it slides vertically relative to the mounting seat 42, thereby pushing the engaging block 72 to slide horizontally relative to the mounting seat 42. At this time, the engaging block 72 gradually disengages from the engaging position 71, and the seat assembly 4 can be removed from the connector 22.

[0045] As Figures 12 to 17As shown, a gear adjustment structure capable of adjusting the tilting gear of the backrest 43 relative to the seat portion 41 is provided between the seat portion 41 and the backrest portion 43, and the gear adjustment structure includes a plurality of adjustment positions 81 provided on the seat portion 41, a sliding member 82 capable of sliding relative to the backrest 43 is provided on the backrest portion 43, a clamping portion 821 capable of being snapped into the adjustment position 81 is provided on the sliding member 82, an unlocking member 83 capable of rotating relative to the backrest portion 43 is provided on the backrest portion 43, a cable 84 capable of connecting the unlocking member 83 and the sliding member 82 is provided between the unlocking member 83 and the sliding member 82, a second return spring 85 capable of pushing the sliding member 82 to return to its original position is provided between the sliding member 82 and the backrest portion 43, and a locking member 83 capable of locking the locking member 83 to the backrest portion 43 is provided on the seat portion 41. A stopper 413 is provided to prevent the sliding member 82 from rotating forward. A two-way locking assembly 9 is provided between the unlocking member 83 and the backrest 43. The two-way locking assembly 9 includes an unlocking button 91 provided on the unlocking member 83. The unlocking button 91 is provided with a protrusion 92. The backrest 43 is provided with a groove 93 that can make way for the protrusion 92 so that the cable 84 pulls the sliding member 82 away from the stopper 413. An elastic element 94 is provided between the unlocking button 91 and the backrest 43 to push the protrusion 92 on the unlocking button 91 and the groove 93 to be misaligned. A movable space is provided between the protrusion 92 and the backrest 43 so that the cable 84 can be pulled when the unlocking member 83 rotates to unlock the gear adjustment structure. In order to prevent adults from accidentally rotating and folding the backrest 43 toward the seat 41 when adjusting the tilting gear of the backrest 43 and the seat 41, a two-way locking assembly 9 is provided to prevent adults from operating it incorrectly. When the adult does not unlock the second locking assembly 9, the unlocking member 83 can still rotate relative to the backrest 43 to unlock the gear adjustment structure, but at this time the position of the sliding member 82 is supported by the stopper 413, and the clamping portion 821 will be pressed against the stopper 413 when rotating to prevent the backrest 43 from rotating forward relative to the seat 41. There is a movable space between the protrusion 92 and the backrest 43, so that the unlocking member 83 has enough position to unlock the gear adjustment structure. When the seat assembly 4 needs to be folded, the unlocking button 91 is pushed horizontally to align the protrusion 92 on the unlocking button 91 with the clearance groove 93. At this time, the unlocking member 83 has enough rotation distance to pull the cable 84, and the clamping portion 821 on the sliding member 82 is separated from the stopper 413, and the backrest 43 can be rotated to fold toward the seat 41. Furthermore, when the backrest portion 43 is rotated and folded, it drives the locking assembly 45 to unlock, and the seat portion 41 can be rotated relative to the mounting seat 42. At this time, the seat portion 41 pushes the unlocking block 63 to achieve linked unlocking, ensuring that the front support rod 1, the rear support rod 2 and the push rod assembly 3 are unlocked, facilitating the folding operation.

[0046] like Figures 12 to 16As shown, the locking assembly 45 includes a left connecting shell 451 disposed on the seat portion 41 and a right connecting shell 452 disposed on the mounting seat 42, wherein the left connecting shell 451 and the right connecting shell 452 are both provided with a spline groove 453, and the left connecting shell 451 and the right connecting shell 452 enclose a sealed space, wherein the sealed space is provided with a spline 454 which can move laterally therein and can be engaged with the spline grooves 453 on the left connecting shell 451 and the right connecting shell 452 at the same time, A third return spring 455 is also provided between the spline 454 and the right connecting shell 452, and a pushing protrusion 456 is provided on the backrest portion 43, which can push the spline 454 to slide horizontally and disengage from the spline groove 453 on the left connecting shell 451 when the backrest 43 is rotated and folded, and a clearance space 457 is provided on the spline 454 to accommodate the pushing protrusion 456, and a first pushing surface 458 that can be pushed by the pushing protrusion 456 is also provided in the clearance space 457 on the spline 454. When it is necessary to unlock the locking assembly 45, first unlock the second locking assembly 9, then unlock the gear adjustment structure, rotate the backrest 43 forward, and the backrest 43 will be rotated and folded toward the seat portion 41. At this time, the pushing protrusion 456 on the backrest 43 will gradually push the first pushing surface 458 on the spline 444 along with the rotation, thereby pushing the spline 454 to slide laterally. At this time, the spline 454 will gradually detach from the spline groove 453 on the left connecting shell 451 and enter into the right connecting shell 452. At this time, the seat portion 41 can be rotated and folded relative to the mounting seat 42.

[0047] like Figure 12 and Figure 13 As shown, the spline 454 is also provided with a protruding block 459, and the armrest portion 44 is provided with a snap-in groove 450 that can be snapped by the block 459 to prevent the armrest portion 44 from rotating and folding. When the spline 454 slides, the block 459 on the spline 454 also disengages from the snap-in groove 450 on the armrest portion 44, and the armrest portion 44 can be rotated relative to the seat portion 41 and folded.

[0048] The embodiment is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the present purpose.

Claims

1. A child stroller frame, characterized in that: The invention comprises a push rod assembly (3) and a front support rod (1) and a rear support rod (2) both of which are connected to wheels (100); a connecting seat (21) is fixedly provided at the upper end of the rear support rod (2); a first connecting portion (11) is fixedly provided at the upper end of the front support rod (1); a second connecting portion (32) is fixedly provided at the lower end of the push rod assembly (3); a connector (22) which can be detachably connected to a seat assembly (4) is provided on the inner side of the connecting seat (21); the first connecting portion (11) is pivotally connected to the connecting seat (21); the second connecting portion (32) is pivotally connected to the connecting seat (21); a linkage rod (5) is pivotally connected to the first connecting portion (11) and the second connecting portion (32) and can drive the front support rod (1) to rotate and fold toward the rear support rod (2) when the push rod assembly (3) is rotated and folded relative to the rear support rod (2); The connecting seat (21) is provided with a locking member (61) which can slide therein, and the first connecting portion (11) and the second connecting portion (32) are provided with a locking position (62) which can engage with or disengage from the locking member (61). The locking member (61) is provided with an unlocking block (63) which is exposed from the connecting seat (21) and can be pushed by the seat portion (41) of the seat assembly (4) when the seat assembly (4) is rotated and folded relative to the front support rod (1) so that the locking member (61) is disengaged from the locking position (62). The rear support rod (2) is also provided with a handle (64) which is exposed and can pull the locking member (61) and the locking position (62) to disengage when the seat assembly (4) is disengaged from the connector (22). A first return spring (65) which can push the locking member (61) to return to its original position is provided between the locking member (61) and the connecting seat (21).

2. The child stroller frame according to claim 1, characterized in that: The locking position (62) comprises a first locking port (621) provided on the first connecting portion (11) and a second locking port (622) provided on the second connecting portion (32); the locking member (61) comprises a body (611) which can slide in the connecting seat (21); a locking block (612) which can be engaged with or disengaged from the first locking port (621) and the second locking port (622) is provided on the upper end of the body (611); and a locking member (612) which can be engaged with or disengaged from the first locking port (621) and the second locking port (622) is provided on one side of the body (611). An arc-shaped portion (613) extends and protrudes out of the connecting seat (21), the unlocking block (63) is arranged at one end of the arc-shaped portion (613) and is located below the connector (22), the handle (64) includes a sliding seat (641) that can slide along the rear support rod (2), the lower end of the sliding seat (641) is provided with a handle (642) protruding to one side thereof, and the upper end of the sliding seat (641) is provided with a hook (643) that can be engaged with the arc-shaped portion (613).

3. The child stroller frame according to claim 2, characterized in that: The arc-shaped portion (613) is provided with a locking hole (614), and the locking hook (643) is locked in the locking hole (614).

4. The child stroller frame according to claim 2, characterized in that: The rear support rod (2) is provided with a sliding groove (23), the sliding seat (641) is provided with a strip hole (644) along its sliding direction, and the rear support rod (2) is provided with a limiting shaft (24) passing through the strip hole (644) and the groove wall of the sliding groove (23).

5. The child stroller frame according to any one of claims 1 to 4, characterized in that: The seat assembly (4) comprises a mounting seat (42) detachably connected to the connector (22); the seat portion (41) is rotatably connected to the mounting seat (42); the seat portion (41) is provided with a backrest portion (43) and an armrest portion (44) which are rotatable relative to the seat portion (41); and a locking assembly (45) which is capable of locking the seat assembly (4) in an unfolded state is provided between the mounting seat (42), the seat portion (41), the backrest portion (43) and the armrest portion (44).

6. The child stroller frame according to claim 5, characterized in that: The seat portion (41) comprises a seat plate (411) and an unlocking block (63) which is arranged on the seat plate (411) and can push the unlocking block (63) when the seat portion (41) rotates relative to the mounting seat (42) so that the locking member (61) and the locking position (62) are separated from the unlocking block (412); the unlocking block (412) comprises an unlocking slider (412) which is slidably connected to the seat plate (411) and can push the unlocking block (63) to slide when the seat portion (41) rotates and folds relative to the mounting seat (42). 121), a reset element (4122) capable of pushing the unlocking slider (4121) to reset is further provided between the unlocking slider (4121) and the seat plate (411), a first inclined surface (4123) is provided on the unlocking slider (4121), and a pushing surface (631) capable of pushing the first inclined surface (4123) to retract the unlocking slider (4121) into the seat plate (411) when the seat assembly (4) is unfolded is provided on the unlocking block (63).

7. The child stroller frame according to claim 5, characterized in that: A locking assembly capable of locking the mounting seat (42) and the connector (22) is provided between the mounting seat (42) and the connector (22), the locking assembly comprising a locking position (71) provided on the connector (22), a locking block (72) capable of sliding laterally relative to the mounting seat (42) and engaging in or disengaging from the locking position (71), the mounting seat (42) is also connected to an operating member (73) capable of sliding vertically relative to the mounting seat and pushing the locking block (72) to slide laterally, a first elastic member (74) capable of pushing the locking block (72) to reset is provided between the locking block (72) and the mounting seat (42), and a second elastic member (75) capable of pushing the operating member (73) to reset is provided between the operating member (73) and the mounting seat (42).

8. The child stroller frame according to claim 5, characterized in that: A gear adjustment structure capable of adjusting the tilting gear of the backrest (43) relative to the seat portion (41) is provided between the seat portion (41) and the backrest portion (43), the gear adjustment structure comprising a plurality of adjustment positions (81) provided on the seat portion (41), a sliding member (82) capable of sliding relative to the backrest (43), a snap-in portion (821) capable of snapping into the adjustment position (81) is provided on the sliding member (82), an unlocking member (83) capable of rotating relative to the backrest (43), a cable (84) capable of connecting the unlocking member (83) and the sliding member (82) is provided between the unlocking member (83) and the sliding member (82), and a second return spring (85) capable of pushing the sliding member (82) to return to its original position is provided between the sliding member (82) and the backrest portion (43).

9. The child stroller frame according to claim 8, characterized in that: The seat portion (41) is also provided with a stopper (413) capable of preventing the sliding member (82) from rotating forward; a two-way locking assembly (9) is provided between the unlocking member (83) and the backrest portion (43); the two-way locking assembly (9) comprises an unlocking button (91) provided on the unlocking member (83); a protrusion (92) is provided on the unlocking button (91); a making way groove (93) is provided on the backrest portion (43) capable of making way for the protrusion (92) so that the cable (84) pulls the sliding member (82) away from the stopper (413); an elastic element (94) is provided between the unlocking button (91) and the backrest portion (43) capable of pushing the protrusion (92) on the unlocking button (91) and the making way groove (93) to be misaligned; and a movable space is provided between the protrusion (92) and the backrest portion (43) so that the cable (84) can be pulled when the unlocking member (83) rotates to unlock the gear adjustment structure.

10. The child stroller frame according to claim 5, characterized in that: The locking assembly (45) comprises a left connecting shell (451) arranged on the seat portion (41) and a right connecting shell (452) arranged on the mounting seat (42), wherein the left connecting shell (451) and the right connecting shell (452) are both provided with a spline groove (453), wherein the left connecting shell (451) and the right connecting shell (452) enclose a sealed space, wherein the sealed space is provided with a spline (454) which can move laterally therein and can be simultaneously engaged with the spline grooves (453) on the left connecting shell (451) and the right connecting shell (452), wherein a third return spring (455) is further provided between the spline (454) and the right connecting shell (452), wherein the backrest The armrest portion (43) is provided with a pushing protrusion (456) which can push the spline (454) to slide horizontally and disengage from the spline groove (453) on the left connecting shell (451) when the armrest portion (43) is rotated and folded; the spline (454) is provided with a clearance space (457) which can accommodate the pushing protrusion (456); the clearance space (457) on the spline (454) is also provided with a first pushing surface (458) which can be pushed by the pushing protrusion (456); the spline (454) is also provided with a protruding convex block (459); and the armrest portion (44) is provided with a clamping groove (450) which can be clamped by the convex block (459) to prevent the armrest portion (44) from rotating and folding.

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