Stroller frame

Abstract

The stroller frame comprises a push rod assembly, a front supporting rod and a rear supporting rod, a connecting base is fixedly arranged at the upper end of the rear supporting rod, a first connecting part is fixedly arranged at the upper end of the front supporting rod, and a second connecting part is fixedly arranged at the lower end of the push rod assembly. A linkage rod pivoted with the first connecting part and the second connecting part is arranged between the first connecting part and the second connecting part, clamping and locking positions are arranged on the first connecting part and the second connecting part, and the connecting seat is further provided with a clamping and locking piece which can slide relative to the connecting seat to be clamped and locked with or separated from the clamping and locking positions at the same time. The clamping and locking piece is provided with a first unlocking part which is exposed out of the connecting base and can be pushed by the seat part of the seat assembly to enable the clamping and locking piece to be separated from the clamping and locking position when the seat assembly rotates and is folded towards the front supporting rod, and 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 children's pushchair frame.

BACKGROUND

[0002] Children's pushchairs are common products in the growth process of infants and young children. The current children's pushchairs can generally be unfolded or folded, and in the unfolded state, children can ride and travel, and in the folded state, it is convenient for storage or carrying.

[0003] The Chinese utility model patent with publication number CN221188720U is a prior patent applied for by the applicant in 2023, which discloses a children's pushchair. The main technical solution is that when the seat is folded relative to the mounting seat, the locking assembly between the front legs, rear legs and support rods can be unlocked, making the folding operation of the children's pushchair convenient. However, the children's pushchair structure has the following disadvantages: after the seat is removed from the mounting seat, the locking assembly is not convenient to unlock, because the exposed part of the unlocking piece cooperating with the seat for unlocking is too small to facilitate the adult's finger to push, and in order to avoid interference or not smooth during the seat rotating unfolding or rotating folding process, the unlocking piece cannot be made to the size sufficient for the adult's finger to push, therefore, the scheme cannot satisfy the separate convenient folding of the front legs, rear legs and support rods after the seat is removed. In fact, for infants and young children, when they are born, they are placed flat in a sleeping basket, and when they travel, the sleeping basket is installed on the frame, and adults push them to travel, and as the infants and young children grow up to a certain age, the sleeping basket is no longer suitable for children to travel, and when they travel, they can choose to install a seat on the frame and ride in the seat. However, the prior patent technical solution connects the baby sleeping basket to the mounting seat, and since the baby sleeping basket cannot drive the locking assembly between the front legs, rear legs and support rods to unlock, and there is no other unlocking component that can operate the locking assembly to unlock, therefore, the prior patent application technical solution is not suitable for connecting the baby sleeping basket to the frame, resulting in a small product application range.

[0004] Therefore, the utility model is generated based on the above disadvantages.

UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the defects of the prior art, and provides a children's pushchair frame which is convenient to unlock and fold and has a wide application range.

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

[0007] A child stroller frame, comprising a push rod assembly, front and rear support rods each connected with wheels, a connecting seat fixedly arranged on the upper end of the rear support rod, a first connecting part fixedly arranged on the upper end of the front support rod, a second connecting part fixedly arranged on the lower end of the push rod assembly, a connector arranged in the inner side of the connecting seat and capable of detachably connecting with a seat assembly, the first connecting part and the connecting seat being pivotally connected around a first axis, the second connecting part and the connecting seat being pivotally connected around a second axis, a linkage rod being arranged between the first connecting part and the second connecting part and being pivotally connected with both of them and capable of driving the front support rod to pivotally fold towards the rear support rod when the push rod assembly is pivoted to fold relative to the rear support rod, one end of the linkage rod being pivotally connected to the first connecting part around a third axis, the other end of the linkage rod being pivotally connected to the second connecting part around a fourth axis, the first connecting part and the second connecting part each being provided with a locking position, the connecting seat further being provided with a locking member capable of sliding relative to the connecting seat and simultaneously locking or disengaging with each locking position, the locking member being provided with a first unlocking part exposed to the connecting seat and capable of being pushed by a seat part of the seat assembly to make the locking member disengage with the locking position when the seat assembly is pivoted to fold towards the front support rod, a first reset spring being arranged between the locking member and the connecting seat and capable of pushing the locking member to reset.

[0008] The locking member comprises a sliding seat slidingly connected to the connecting seat, the sliding seat being provided with a locking pin capable of being locked into the locking position.

[0009] The connecting seat is provided with a sliding groove capable of guiding the sliding of the locking pin.

[0010] The lower end of the front support rod is provided with a front cross rod, the lower end of the rear support rod is provided with a rear cross rod, the front cross rod is provided with a rotating rod capable of rotating relative to the front cross rod, a flexible belt is arranged between the rotating rod and the rear cross rod and capable of pulling up the rotating rod when the child stroller frame is in an unfolded state, a torsional spring is further arranged between the rotating rod and the front cross rod and capable of pushing the rotating rod to unfold when the child stroller frame is folded.

[0011] The locking member further comprises a sliding block connected to the sliding seat, the sliding block extending partially out of the connecting seat, the first unlocking part being arranged on the sliding block, the sliding block being further provided with a second unlocking part exposed to the connecting seat and capable of being operated to make the locking member disengage with the locking position.

[0012] The seat assembly comprises a mounting seat detachably connected with the connector, the mounting seat being rotatably connected with the seat part, the seat part being provided with a backrest part and a handrail part capable of rotating relative to the seat part, a locking assembly being arranged between the mounting seat, the seat part, the backrest part and the handrail part and capable of locking the seat assembly in an unfolded state.

[0013] The seat part comprises a seat plate and an unlocking part arranged on the seat plate and capable of pushing the first unlocking part to make the locking part and the locking position separate when the seat part rotates relative to the mounting base, the unlocking part comprises an unlocking slider slidingly connected to the seat plate and capable of pushing the first unlocking part to slide when the seat part rotates to fold, a reset element capable of pushing the unlocking slider to reset is arranged between the unlocking slider and the seat plate, a first inclined surface is arranged on the unlocking slider, and a pushing surface capable of pushing the first inclined surface to make the unlocking slider retract into the seat plate when the seat assembly is unfolded is arranged on the first unlocking part.

[0014] The mounting base and the connector are provided with a locking assembly capable of locking the two, the locking assembly comprises a locking position arranged on the connector, a locking block capable of sliding transversely relative to the mounting base to lock into or separate from the locking position is arranged on the mounting base, an operating part capable of pushing the locking block to slide transversely relative to the mounting base is connected to the mounting base, a first elastic element capable of pushing the locking block to reset is arranged between the locking block and the mounting base, and a second elastic element capable of pushing the operating part to reset is arranged between the operating part and the mounting base.

[0015] The seat part and the backrest part are provided with a position adjusting structure capable of adjusting the inclination position of the backrest part relative to the seat part, the position adjusting structure comprises a plurality of adjusting positions arranged on the seat part, a sliding part capable of sliding relative to the backrest part is arranged on the backrest part, a clamping part capable of locking into the adjusting position is arranged on the sliding part, an unlocking part capable of rotating relative to the backrest part is arranged on the backrest part, a first pull rope capable of connecting the two is arranged between the unlocking part and the sliding part, and a second reset spring capable of pushing the sliding part to reset is arranged between the sliding part and the backrest part.

[0016] The seat part is further provided with a stop part capable of preventing the sliding part from rotating forward, the unlocking part and the backrest part are provided with a two-way locking assembly, the two-way locking assembly comprises an unlocking knob arranged on the unlocking part, a protrusion is arranged on the unlocking knob, a clearance groove capable of providing a clearance for the protrusion to make the first pull rope pull the sliding part to separate from the stop part is arranged on the backrest part, an elastic element capable of pushing the protrusion on the unlocking knob and the clearance groove out of position is arranged between the unlocking knob and the backrest part, and an activity space capable of pulling the first pull rope to make the position adjusting structure unlock when the unlocking part rotates is arranged between the protrusion and the backrest part.

[0017] The seat assembly further comprises a leg rest plate rotatably connected to the seat part, and an adjusting assembly is arranged between the leg rest plate and the seat part to adjust the angle of the leg rest plate relative to the seat part, the adjusting assembly comprises a left rotating shell arranged on the seat part and a right rotating shell arranged on the leg rest plate, the left rotating shell and the right rotating shell are both provided with a clamping groove, the left rotating shell and the right rotating shell enclose a movable space, the movable space is provided with a second spline capable of moving transversely in the movable space and capable of being clamped in the clamping grooves of the left rotating shell and the right rotating shell at the same time, the second spline and the left rotating shell are further provided with an elastic component, the second spline and the right rotating shell are provided with a rotating part capable of rotating relative to the second spline and the right rotating shell, the right rotating shell is provided with a pushing protrusion capable of pushing the rotating part to slide transversely when the rotating part rotates, and the second spline can be separated from the clamping groove on the right rotating shell when the rotating part slides transversely, the leg rest plate is further provided with an operating element capable of sliding relative to the leg rest plate, the operating element and the rotating part are provided with a second cable capable of driving the rotating part to move when the operating element is operated, and the operating element and the leg rest plate are provided with an elastic reset component capable of pushing the operating element to reset.

[0018] Compared with the prior art, the utility model has the advantages of:

[0019] 1、When the child stroller frame needs to be folded, the seat part can push the first unlocking part when being folded relative to the rear support rod, so that the clamping part is separated from the clamping positions at the same time, at this time, the front support rod, the rear support rod and the push rod assembly are unlocked with each other, the user operates the push rod assembly, at this time, the second connecting part rotates relative to the connecting seat around the second axis to make the push rod assembly close to the rear support rod, in the process of rotating the second connecting part, the second connecting part drives one end of the linkage rod to move, one end of the linkage rod moves around the fourth axis, the other end of the linkage rod is pulled to move relative to the first connecting part around the third axis, at this time, under the driving of the linkage rod, the first connecting part can rotate relative to the connecting seat around the first axis to close to the rear support rod, and the whole child stroller frame can be folded, the folding process is very simple, only needs to push the seat part to be folded relative to the rear support rod, and then pushes the push rod assembly to rotate and close to the rear support rod to complete the folding, the first connecting part and the second connecting part are both provided with clamping positions, and the clamping part can be locked with the clamping positions on the first connecting part and the second connecting part at the same time, so that the whole frame is safer when being unfolded, and the shaking of the frame is reduced.

[0020] 2、The clamping position is a clamping groove, and the two locking pins can be clamped into the clamping grooves of the first connecting part and the second connecting part at the same time, so that the whole frame is safer when being unfolded.

DRAWINGS

[0021] Figure 1 is one of the perspective views of the child stroller frame of the utility model after the seat assembly is removed;

[0022] Figure 2 is the second perspective view of the child stroller frame after the seat assembly is removed according to the utility model;

[0023] Figure 3 is Figure 2 the enlarged view of E area in figure 1;

[0024] Figure 4 is one of the sectional views of the components of the utility model;

[0025] Figure 5 is the second sectional view of the components of the utility model;

[0026] Figure 6 is one of the exploded views of the components of the utility model;

[0027] Figure 7 is the second exploded view of the components of the utility model;

[0028] Figure 8 is the side view of the utility model in the unfolded state;

[0029] Figure 9 is the side view of the utility model in the folding process;

[0030] Figure 10 is the perspective view of the utility model when the seat assembly is configured;

[0031] Figure 11 is one of the perspective views of the seat of the utility model;

[0032] Figure 12 is one of the exploded views of the seat of the utility model;

[0033] Figure 13 is the second exploded view of the seat of the utility model;

[0034] Figure 14 is the second perspective view of the seat of the utility model;

[0035] Figure 15 is the perspective view of the spline of the utility model;

[0036] Figure 16 is one of the perspective views of the backrest part of the utility model;

[0037] Figure 17 is the second perspective view of the backrest part of the utility model;

[0038] Figure 18 is one of the exploded views of the seat part and the leg rest plate of the utility model;

[0039] Figure 19 is the second exploded view of the seat part and the leg rest plate of the utility model;

[0040] Figure 20 This is a perspective view of the present invention when configured with an infant bassinet;

[0041] Figure 21 This is a perspective view of the folded state of this utility model.

Detailed Implementation Methods

[0042] The present invention will be further described below with reference to the accompanying drawings:

[0043] like Figures 1 to 20 As shown, a stroller frame includes a push rod assembly 3 and a front support rod 1 and a rear support rod 2, both connected to wheels 100. A connecting seat 21 is fixedly mounted on the upper end of the rear support rod 2. A first connecting part 11 is fixedly mounted on the upper end of the front support rod 1. A second connecting part 32 is fixedly mounted on the lower end of the push rod assembly 3. A connector 22, detachably connected to a seat assembly 4, is provided inside the connecting seat 21. The first connecting part 11 is pivotally connected to the connecting seat 21 around a first axis A, and the second connecting part 32 is pivotally connected to the connecting seat 21 around a second axis B. A pivotal connection is provided between the first connecting part 11 and the second connecting part 32, which, when the push rod assembly 3 rotates and folds relative to the rear support rod 2, drives the front support rod 1 to rotate and fold towards the rear support rod 2. The linkage rod 5 is folded, with one end of the linkage rod 5 rotating around the third axis C and connected to the first connecting part 11, and the other end of the linkage rod 5 rotating around the fourth axis D and connected to the second connecting part 32. Both the first connecting part 11 and the second connecting part 32 are provided with locking positions 61. The connecting seat 21 is also provided with locking members 62 that can slide relative to it and lock or disengage from each locking position 61 at the same time. The locking members 62 are provided with a first unlocking part 63 that is exposed on the connecting seat 21 and can be pushed by the seat part 41 of the seat assembly 4 when the seat assembly 4 rotates and folds forward support rod 1, so that the locking members 62 disengage from the locking positions 61. A first return spring 64 that can push the locking members 62 to reset is provided between the locking members 62 and the connecting seat 21.

[0044] like Figures 3 to 7As shown, when the stroller frame needs to be folded, the seat part 41 can push the first unlocking part 63 when rotating and folding relative to the rear support rod 2, so that the locking piece 62 is simultaneously separated from each locking position 61, at this time the front support rod 1, the rear support rod 2 and the push rod assembly 3 are unlocked with each other, the user operates the push rod assembly 3, at this time the second connecting part 32 rotates relative to the connecting seat 21 around the second axis B so that the push rod assembly 3 approaches the rear support rod 2, in the process of rotating the second connecting part 32, one end of the linkage rod 5 is driven by the second connecting part 32 to move, one end of the linkage rod 5 moves around the fourth axis D, the other end of the linkage rod 5 is pulled to move relative to the first connecting part 21 around the third axis C, at this time, under the driving of the linkage rod 5, the first connecting part 11 can rotate relative to the connecting seat 21 around the first axis A to approach the rear support rod 2, and the whole stroller frame can be folded, the folding process is very simple, only need to push the seat part 41 to rotate and fold relative to the rear support rod 2 to realize the unlocking of the whole vehicle, then push the push rod assembly 3 to rotate to approach the rear support rod 2 to complete the folding, the first connecting part 11 and the second connecting part 32 are provided with the locking position 61, the locking piece 62 can be locked with the locking position 61 on the first connecting part 11 and the second connecting part 32 at the same time, which can reduce the shaking and make the whole frame more safe when unfolded.

[0045] As shown in Figures 6 to 7 The locking piece 62 includes a sliding seat 621 slidingly connected to the connecting seat 21, and the sliding seat 621 is provided with a locking pin 622 capable of being locked into the locking position 61. The locking position 61 is a locking groove, and the two locking pins 622 can be simultaneously locked into the locking grooves of the first connecting part 11 and the second connecting part 32, so that the whole frame is safer when unfolded.

[0046] As shown in Figures 6 to 7 The connecting seat 21 is provided with a sliding groove 211 capable of guiding the sliding of the locking pin 622. The sliding groove 211 is provided for guiding the sliding of the locking pin 622 and controlling the stroke of the sliding of the locking piece 62.

[0047] As shown in Figure 1 and Figure 21As shown, the lower end of the front support rod 1 is provided with a front crossbar 12, and the lower end of the rear support rod 2 is provided with a rear crossbar 23. A rotating rod 24, which can rotate relative to the front crossbar 23, is provided between the rotating rod 24 and the rear crossbar 23. A flexible strap (not shown in the figure) is provided between the rotating rod 24 and the rear crossbar 23 to pull the rotating rod 24 up when the stroller frame is in the unfolded state. A torsion spring (not shown in the figure) is also provided between the rotating rod 24 and the front crossbar 12 to push the rotating rod 24 to unfold when the stroller frame is folded. In the unfolded state of the stroller, the flexible strap pulls up the rotating rod 24, the torsion spring is in a deformed state, and the rotating rod 24 is lifted off the ground. During the folding process of the stroller, the flexible strap releases the rotating rod 24, the torsion spring elastically returns to its original position, and pushes the rotating rod 24 to rotate and unfold. At this time, the rotating rod 24 can be supported on the ground. Through the support of the rotating rod 24 and the wheel 100 at the lower end of the rear support rod 2, the folded stroller frame can stand upright on the ground for easy storage.

[0048] like Figures 6 to 7 As shown, the locking member 62 also includes a sliding block 623 connected to the sliding seat 621. The sliding block 623 extends out of the connecting seat 21. The first unlocking part 63 is disposed on the sliding block 623. The sliding block 623 is also provided with a second unlocking part 65 exposed to the connecting seat 21 and operable to disengage the locking member 62 from the locking position 61.

[0049] After the seat assembly 4 is detached from the connector 22, the user can also pull the sliding block 623 by pulling the second unlocking part 65, thereby causing the locking pin 622 on the sliding seat 621 to disengage from the locking position 61. At this time, without the seat assembly 41 driving, the front support rod 1, the rear support rod 2, and the push rod assembly 3 are also unlocked. Then, rotating the push rod assembly 3 will drive the front support rod 1 to rotate and move closer to the rear support rod 2 via the linkage rod 5, which can also realize the independent folding of the frame without the seat assembly 4. Therefore, when the baby bassinet 200 is connected to the connector 22, if... Figure 18 To fold the stroller frame, the bassinet 200 can be removed first, and then the front support rod 1, rear support rod 2, and push rod assembly 3 can be unlocked via the second unlocking part 65, allowing the frame without the seat assembly 4 to fold for easy storage and transport. Therefore, the entire stroller can be folded when the seat assembly 4 is connected, and the front support rod 1, rear support rod 2, and push rod assembly 3 can also be folded when the bassinet 200 is connected, making it widely applicable and offering a very convenient and quick unlocking and folding operation.

[0050] like Figures 11 to 14As shown, the seat assembly 4 comprises a mounting base 42 detachably connected with the connector 22, the seat part 41 is rotatably connected on the mounting base 42, the back part 43 and the armrest part 44 are arranged on the seat part 41 and can rotate relative to the seat part 41, and the mounting base 42, the seat part 41, the back part 43 and the armrest part 44 are provided with a locking assembly 45 for locking the seat assembly 4 in the unfolded state.

[0051] As shown in the figures, Figures 11 to 14 As shown, the seat part 41 comprises a seat plate 411 and an unlocking part 412 arranged on the seat plate 411 and capable of pushing the first unlocking part 63 to make the locking piece 62 disengage from the locking position 61 when the seat part 41 rotates relative to the mounting base 42, the unlocking part 412 comprises an unlocking slider 4121 slidably connected on the seat plate 411 and capable of pushing the first unlocking part 63 to slide when the seat part 41 rotates to fold relative to the mounting base 42, the unlocking slider 4121 and the seat plate 411 are further provided with a reset element 4122 capable of pushing the unlocking slider 4121 to reset, the unlocking slider 4121 is provided with a first inclined surface 4123, and the first unlocking part 63 is provided with a pushing surface 631 capable of pushing the first inclined surface 4123 to make the unlocking slider 4121 retract into the seat plate 411 when the seat assembly 4 is unfolded. When the seat assembly 4 rotates to fold relative to the mounting base 42, the unlocking slider 4121 rotates with the seat plate 411, the unlocking slider 4121 gradually abuts against and pushes the first unlocking part 63 to slide downward, thereby making the locking pin 622 disengage from the locking position 61; when the seat assembly 4 needs to be unfolded, the seat plate 411 is unfolded reversely, at this time, the first inclined surface 4123 on the unlocking slider 4121 gradually contacts the pushing surface 631 on the first unlocking part 63 and retracts into the seat plate 411 under the pushing of the pushing surface 631, thereby giving the first unlocking part 63 room and avoiding the first unlocking part 63 from being stuck with the unlocking slider 4121.

[0052] As shown in the figures, Figures 11 to 13As shown, the mounting base 42 and the connector 22 are provided with a locking assembly capable of locking the two, the locking assembly comprises a clamping position 71 provided on the connector 22, the mounting base 42 is provided with a clamping block 72 capable of sliding transversely relative to the mounting base 42 to clamp into or disengage from the clamping position 71, the mounting base 42 is further connected with an operating member 73 capable of sliding vertically relative to the mounting base 42 to push the clamping block 72 to slide transversely, the clamping block 72 and the mounting base 42 are provided with a first elastic element 74 capable of pushing the clamping block 72 to reset, the operating member 73 and the mounting base 42 are provided with a second elastic element 75 capable of pushing the operating member 73 to reset. The mounting base 42 and the connector 22 are locked by the locking assembly, which facilitates the mounting base 42 to be quickly mounted on the connector 22, and when it is needed to take down and separate the seat assembly 4, only the operating member 73 needs to be pressed, the operating member 73 is pressed to slide vertically relative to the mounting base 42, thereby pushing the clamping block 72 to slide transversely relative to the mounting base 42, at this time the clamping block 72 gradually disengages from the clamping position 71, and the seat assembly 4 can be taken down from the connector 22.

[0053] As Figures 12 to 17As shown, the seat part 41 and the backrest part 43 are provided with a gear adjusting structure capable of adjusting the inclination angle of the backrest part 43 relative to the seat part 41, the gear adjusting structure comprises a plurality of adjusting positions 81 provided on the seat part 41, the backrest part 43 is provided with a sliding member 82 capable of sliding relative thereto, the sliding member 82 is provided with a clamping portion 821 capable of being clamped into the adjusting position 81, the backrest part 43 is provided with an unlocking member 83 capable of rotating relative thereto, the unlocking member 83 and the sliding member 82 are provided with a pull cable 84 capable of connecting the two, the sliding member 82 and the backrest part 43 are provided with a second reset spring 85 capable of pushing the sliding member 82 to reset, the seat part 41 is further provided with a stop portion 413 capable of preventing the sliding member 82 from rotating forward, the unlocking member 83 and the backrest part 43 are provided with a two-way locking assembly 9, the two-way locking assembly 9 comprises an unlocking knob 91 provided on the unlocking member 83, the unlocking knob 91 is provided with a protrusion 92, the backrest part 43 is provided with a clearance groove 93 capable of providing clearance for the protrusion 92 to make the pull cable 84 pull the sliding member 82 to disengage from the stop portion 413, the unlocking knob 91 and the backrest part 43 are provided with an elastic element 94 capable of pushing the protrusion 92 on the unlocking knob 91 out of the clearance groove 93, the protrusion 92 and the backrest part 43 are provided with a movement space capable of pulling the pull cable 84 to unlock the gear adjusting structure when the unlocking member 83 rotates. In order to avoid adults from mistakenly folding the backrest part 43 towards the seat part 41 when adjusting the inclination angle of the backrest part 43 relative to the seat part 41, the two-way locking assembly 9 is provided to avoid adult misoperation. When the two-way locking assembly 9 is not unlocked, the unlocking member 83 can still rotate relative to the backrest part 43 to unlock the gear adjusting structure, but at this time the position of the sliding member 82 is stopped by the stop portion 413, and the clamping portion 821 will be stopped by the stop portion 413 when rotating to prevent the backrest part 43 from rotating forward relative to the seat part 41 to fold. The movement space between the protrusion 92 and the backrest part 43 makes the unlocking member 83 have enough position to unlock the gear adjusting structure. When it is necessary to fold the seat assembly 4, the unlocking knob 91 is pushed transversely and the protrusion 92 on the unlocking knob 91 is aligned with the clearance groove 93, at this time the unlocking member 83 has enough rotating distance to pull the pull cable 84 and make the clamping portion 821 on the sliding member 82 separate from the stop portion 413, at this time the backrest part 43 can be rotated to fold towards the seat part 41. And when the backrest part 43 rotates to fold, the drive locking assembly 45 is unlocked, the seat part 41 can rotate relative to the mounting seat 42, at this time the seat part 41 pushes the first unlocking portion 63 to act, thereby realizing linkage unlocking to ensure that the front support rod 1, the rear support rod 2 and the push rod assembly 3 are unlocked, facilitating folding operation.

[0054] As Figures 12 to 16As shown, the locking assembly 45 comprises a left connecting shell 451 arranged on the seat part 41 and a right connecting shell 452 arranged on the mounting base 42, and a spline groove 453 is arranged in each of the left connecting shell 451 and the right connecting shell 452. The left connecting shell 451 and the right connecting shell 452 enclose a sealed space, and a first spline 454 is arranged in the sealed space and can move laterally in the sealed space and can be engaged with the spline groove 453 of the left connecting shell 451 and the right connecting shell 452. A third return spring 455 is arranged between the first spline 454 and the right connecting shell 452. The backrest part 43 is provided with a pushing protrusion 456 which can push the first spline 454 to slide laterally and disengage from the spline groove 453 of the left connecting shell 451 when the backrest part 43 is folded. The first spline 454 is provided with a space 457 which can accommodate the pushing protrusion 456. The space 457 of the first spline 454 is further provided with a first pushing surface 458 which can be pushed by the pushing protrusion 456. When the locking assembly 45 needs to be unlocked, the two locking assemblies 9 are unlocked first, and then the gear adjusting structure is unlocked, and the backrest part 43 is rotated forward, and the backrest part 43 is folded to the seat part 41. At this time, the pushing protrusion 456 on the backrest part 43 gradually pushes the first pushing surface 458 on the spline 444 by following the rotation, so as to push the first spline 454 to slide laterally. At this time, the first spline 454 gradually disengages from the spline groove 453 of the left connecting shell 451 and enters the right connecting shell 452. At this time, the seat part 41 can be folded relative to the mounting base 42.

[0055] As shown in Figure 12 and Figure 13 The first spline 454 is further provided with a protruding block 459, and the armrest part 44 is provided with a clamping groove 450 which can clamp the block 459 to prevent the armrest part 44 from being folded. When the first spline 454 slides, the block 459 on the first spline 454 also disengages from the clamping groove 450 on the armrest part 44. At this time, the armrest part 44 can be folded relative to the seat part 41.

[0056] As shown in Figure 18 and Figure 19As shown, the seat assembly 4 further comprises a leg rest 46 rotatably connected to the seat part 41, and an adjusting assembly 47 arranged between the leg rest 46 and the seat part 41 to adjust the angle of the leg rest 46 relative to the seat part 41. The adjusting assembly 47 comprises a left rotating shell 471 arranged on the seat part 41 and a right rotating shell 472 arranged on the leg rest 46. The left rotating shell 471 and the right rotating shell 472 are both provided with a clamping groove 473. The left rotating shell 471 and the right rotating shell 472 enclose an activity space, and the activity space is provided with a second spline 474 which can move laterally in the activity space and can be clamped in the clamping grooves 473 of the left rotating shell 471 and the right rotating shell 472. The second spline 474 and the left rotating shell 471 are further provided with an elastic member 475. The second spline 474 and the right rotating shell 472 are further provided with a rotating member 476 which can rotate relative to the second spline 474 and the right rotating shell 472. The right rotating shell 472 is provided with a pushing protrusion 4721 which can push the rotating member 476 to slide laterally when the rotating member 476 rotates, and the pushing protrusion 4721 can make the second spline 474 disengage from the clamping groove 473 on the right rotating shell 472 when the rotating member 476 slides laterally. The leg rest 46 is further provided with an operating element 477 which can slide relative to the leg rest 46. The operating element 477 and the rotating member 476 are further provided with a second pull cable 478 which can drive the rotating member 476 to move when the operating element 477 is operated. The operating element 477 and the leg rest 46 are further provided with an elastic reset member 479 which can push the operating element to reset. When it is needed to adjust the position of the leg rest 46 relative to the seat part 41, the operating element 477 is operated, the operating element 477 slides relative to the seat part 41, and the second pull cable 478 is pulled. The second pull cable 478 is pulled to drive the rotating member 476 to rotate, the rotating member 476 rotates relative to the second spline 474 and the right rotating shell 472, and the rotating member 476 is pushed by the pushing protrusion 4721 to move laterally relative to the right rotating shell 472 when the rotating member 476 rotates. At this time, the second spline 474 is pushed to slide laterally in the activity space and gradually disengages from the clamping groove 473 on the right rotating shell 472 and enters the left rotating shell 471. The adjusting assembly 47 is unlocked, and the leg rest 46 can rotate relative to the seat part 41 to adjust the position. When the position adjustment is completed, the operating element 477 is released, and the elastic reset member 479 pushes the second spline 474 and the rotating member 476 to reset. The second spline 474 is clamped in the clamping grooves 473 of the left rotating shell 471 and the right rotating shell 472 again. In an embodiment, the two sides of the leg rest 46 and the seat part 41 are both provided with the adjusting assembly 47, and two adjusting assemblies 47 can be unlocked by operating one operating element 477, which is more convenient. Compared with the pressing type adjusting assembly 47, a user can complete the operation with one hand, which is more convenient.

[0057] The embodiment is described in detail above in combination with the drawings, but the utility model is not limited to the above embodiment, and various changes can be made within the knowledge range possessed by those skilled in the art in the technical field without departing from the purpose.

Claims

1. A child's pushchair frame characterised in that: The utility model relates to a child stroller frame, which comprises a push rod assembly (3) and a front support rod (1) and a rear support rod (2) each connected with a wheel (100), the upper end of the rear support rod (2) is fixedly provided with a connecting seat (21), the upper end of the front support rod (1) is fixedly provided with a first connecting part (11), the lower end of the push rod assembly (3) is fixedly provided with a second connecting part (32), the inner side of the connecting seat (21) is provided with a connector (22) capable of detachably connecting with a seat assembly (4), the first connecting part (11) and the connecting seat (21) are pivotally connected around a first axis (A), the second connecting part (32) and the connecting seat (21) are pivotally connected around a second axis (B), a linkage rod (5) is arranged between the first connecting part (11) and the second connecting part (32) and 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), one end of the linkage rod (5) is pivotally connected to the first connecting part (11) around a third axis (C), the other end of the linkage rod (5) is pivotally connected to the second connecting part (32) around a fourth axis (D), the first connecting part (11) and the second connecting part (32) are each provided with a locking position (61), the connecting seat (21) is further provided with a locking piece (62) capable of sliding relative to the connecting seat (21) and simultaneously locking or disengaging from each locking position (61), the locking piece (62) is provided with a first unlocking part (63) exposed to the connecting seat (21) and capable of being pushed by a seat part (41) of the seat assembly (4) to disengage the locking piece (62) from the locking position (61) when the seat assembly (4) rotates and folds towards the front support rod (1), a first reset spring (64) is arranged between the locking piece (62) and the connecting seat (21) and capable of pushing the locking piece (62) to reset.

2. The child's pushchair frame of claim 1, wherein: The locking piece (62) comprises a sliding seat (621) slidably connected to the connecting seat (21), the sliding seat (621) is provided with a locking pin (622) capable of being locked into the locking position (61), the connecting seat (21) is provided with a sliding groove (211) capable of guiding the sliding of the locking pin (622).

3. The child's buggy frame of claim 1, wherein: The lower end of the front support rod (1) is provided with a front cross rod (12), the lower end of the rear support rod (2) is provided with a rear cross rod (23), the front cross rod (12) is provided with a rotating rod (24) capable of rotating relative to the front cross rod (12), the rotating rod (24) and the rear cross rod (23) are provided with a flexible belt capable of pulling up the rotating rod (24) when the child stroller frame is in an unfolded state, the rotating rod (24) and the front cross rod (12) are further provided with a torsional spring capable of pushing the rotating rod (24) to unfold when the child stroller frame is folded.

4. The child's buggy frame of claim 2, wherein: The locking piece (62) further comprises a sliding block (623) connected to the sliding seat (621), the sliding block (623) extends partially out of the connecting seat (21), the first unlocking part (63) is arranged on the sliding block (623), and the sliding block (623) is further provided with a second unlocking part (65) exposed to the connecting seat (21) and capable of being operated to separate the locking piece (62) from the locking position (61).

5. A child's pushchair frame according to any one of claims 1 to 4, wherein: The seat assembly (4) comprises a mounting seat (42) detachably connected with the connector (22), the mounting seat (42) is rotatably connected with the seat part (41), the seat part (41) is provided with a backrest part (43) and an armrest part (44) capable of rotating relative to the seat part (41), and the mounting seat (42), the seat part (41), the backrest part (43) and the armrest part (44) are provided with a locking assembly (45) capable of locking the seat assembly (4) in an unfolded state.

6. The stroller frame of claim 5, wherein: The seat part (41) comprises a seat plate (411) and an unlocking part (412) arranged on the seat plate (411) and capable of pushing the first unlocking part (63) to separate the locking piece (62) from the locking position (61) when the seat part (41) rotates relative to the mounting seat (42), the unlocking part (412) comprises an unlocking sliding block (4121) slidably connected to the seat plate (411) and capable of pushing the first unlocking part (63) to slide when the seat part (41) rotates and folds relative to the mounting seat (42), the unlocking sliding block (4121) and the seat plate (411) are further provided with a reset element (4122) capable of pushing the unlocking sliding block (4121) to reset, the unlocking sliding block (4121) is provided with a first inclined surface (4123), and the first unlocking part (63) is provided with a pushing surface (631) capable of pushing the first inclined surface (4123) to make the unlocking sliding block (4121) retract into the seat plate (411) when the seat assembly (4) is unfolded.

7. The stroller frame of claim 5, wherein: The mounting seat (42) and the connector (22) are provided with a locking assembly capable of locking the mounting seat (42) and the connector (22), the locking assembly comprises a locking position (71) arranged on the connector (22), the mounting seat (42) is provided with a locking block (72) capable of sliding transversely relative to the mounting seat (42) to lock or unlock the locking position (71), the mounting seat (42) is further connected with an operating piece (73) capable of sliding vertically relative to the mounting seat (42) to push the locking block (72) to slide transversely, the locking block (72) and the mounting seat (42) are provided with a first elastic element (74) capable of pushing the locking block (72) to reset, and the operating piece (73) and the mounting seat (42) are provided with a second elastic element (75) capable of pushing the operating piece (73) to reset.

8. The stroller frame of claim 5, wherein: The seat part (41) and the backrest part (43) are provided with a gear adjusting structure capable of adjusting the inclination angle of the backrest part (43) relative to the seat part (41), the gear adjusting structure comprises a plurality of adjusting positions (81) provided on the seat part (41), the backrest part (43) is provided with a sliding piece (82) capable of sliding relative thereto, the sliding piece (82) is provided with a clamping portion (821) capable of being clamped into the adjusting position (81), the backrest part (43) is provided with an unlocking piece (83) capable of rotating relative thereto, the unlocking piece (83) and the sliding piece (82) are provided with a first pull cable (84) capable of connecting the two, the sliding piece (82) and the backrest part (43) are provided with a second reset spring (85) capable of pushing the sliding piece (82) to reset.

9. The stroller frame of claim 8, wherein: The seat part (41) is further provided with a stop portion (413) capable of preventing the sliding piece (82) from rotating forward, the unlocking piece (83) and the backrest part (43) are provided with a two-way locking assembly (9), the two-way locking assembly (9) comprises an unlocking knob (91) provided on the unlocking piece (83), the unlocking knob (91) is provided with a protrusion (92), the backrest part (43) is provided with a clearance groove (93) capable of providing clearance for the protrusion (92) to make the first pull cable (84) pull the sliding piece (82) away from the stop portion (413), the unlocking knob (91) and the backrest part (43) are provided with an elastic element (94) capable of pushing the protrusion (92) on the unlocking knob (91) out of position with the clearance groove (93), the protrusion (92) and the backrest part (43) are provided with a movement space capable of pulling the first pull cable (84) when the unlocking piece (83) rotates to unlock the gear adjusting structure.

10. The child's buggy frame of claim 5, wherein: The seat assembly (4) further comprises a leg rest (46) rotatably connected to the seat part (41), and an adjusting assembly (47) arranged between the leg rest (46) and the seat part (41) to adjust the angle of the leg rest (46) relative to the seat part (41). The adjusting assembly (47) comprises a left rotating shell (471) arranged on the seat part (41) and a right rotating shell (472) arranged on the leg rest (46). The left rotating shell (471) and the right rotating shell (472) are both provided with a clamping groove (473). The left rotating shell (471) and the right rotating shell (472) form a movable space. A second spline (474) is arranged in the movable space and can move laterally in the movable space and be clamped in the clamping grooves (473) of the left rotating shell (471) and the right rotating shell (472) at the same time. An elastic component (475) is arranged between the second spline (474) and the left rotating shell (471). A rotating member (476) is arranged between the second spline (474) and the right rotating shell (472) and can rotate relative to the second spline (474) and the right rotating shell (472). The right rotating shell (472) is provided with a pushing protrusion (4721) which can push the rotating member (476) to slide laterally when the rotating member (476) rotates, and can make the second spline (474) disengage from the clamping groove (473) on the right rotating shell (472) when the rotating member (476) slides laterally. The leg rest (46) is further provided with an operating element (477) which can slide relative to the leg rest (46). The operating element (477) and the rotating member (476) are provided with a second pull rope (478) which can drive the rotating member (476) to move when the operating element (477) is operated. The operating element (477) and the leg rest (46) are provided with an elastic reset member (479) which can reset the operating element.

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