Stroller frame

Abstract

The utility model discloses a stroller frame which comprises a locking device, a first connecting seat is arranged at the upper end of a first supporting leg, a second connecting seat is arranged at the upper end of a second supporting leg, the first connecting seat is rotatably connected with the second connecting seat, a third connecting seat is rotatably connected to the second connecting seat, and a push rod assembly is connected to the third connecting seat. A transmission piece is arranged between the third connecting base and the first connecting base, the locking device comprises a locking rod rotationally connected to the second connecting base, one end of the locking rod is provided with a first clamping and locking part, the other end of the locking rod is provided with a second clamping and locking part, and the first connecting base is provided with a first clamping position capable of being clamped with the first clamping and locking part. The third connecting base is provided with a second clamping position capable of being clamped with the second clamping and locking part, the second connecting base is further provided with an unlocking linkage piece capable of triggering the locking rod to rotate, and the locking device further comprises a first reset spring connected to the second connecting base. The folding chair is simple in structure, convenient to fold, safe and stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of child stroller frame. BACKGROUND

[0002] Child stroller frame is common product in the growth process of children, and general child stroller can be unfolded or folded. In unfolded state, it is convenient for children to ride, and in folded state, it is convenient for carrying or storing.

[0003] Child stroller frame is generally composed of connecting rod mechanism, and connecting rod structure of child stroller frame on the market is various at present, and folding action principle is not the same. Therefore, the utility model provides a new type of child stroller frame different from existing child stroller frame. CONTENT OF UTILITY MODEL

[0004] The utility model aims at overcoming the insufficient of prior art, and provides a kind of child stroller frame, which is simple in structure, easy to fold and safe and stable.

[0005] The utility model is realized by the following technical solutions:

[0006] A child stroller frame can be moved from an unfolded position to a folded position after unlocking a locking device, comprising a first leg and a second leg with wheels, a first connecting seat is fixedly arranged at the upper end of the first leg, a second connecting seat is fixedly arranged at the upper end of the second leg, the first connecting seat is rotatably connected with the second connecting seat, a third connecting seat is rotatably connected with the second connecting seat, a push rod assembly is fixedly connected with the third connecting seat, a transmission member is arranged between the third connecting seat and the first connecting seat, which can drive the first leg to rotate and close to the second leg when the push rod assembly rotates and closes to the second leg, the locking device comprises a locking rod rotatably connected with the second connecting seat, a first locking part is arranged at one end of the locking rod, a second locking part is arranged at the other end of the locking rod, a first clamping site capable of clamping the first locking part is arranged on the first connecting seat, a second clamping site capable of clamping the second locking part when the first locking part and the first clamping site are clamped is arranged on the third connecting seat, an unlocking linkage capable of triggering the locking rod to rotate to make the first clamping site and the first locking part disengage and the second clamping site and the second locking part disengage is further arranged on the second connecting seat, and the locking device further comprises a first reset spring connected with the second connecting seat and capable of pushing the locking rod to rotate and reset.

[0007] The second connecting seat is provided with a seat connecting part, and a seat component is detachably connected to the seat connecting part.

[0008] The seat part is provided with a backrest part rotatable relative to the seat part, and a second clamping assembly is arranged between the backrest part and the seat part.

[0009] The first clamping assembly comprises a first clamping groove arranged on the seat part in a circumferential direction, and a second clamping groove is arranged on the seat connecting seat in a circumferential direction. A clamping piece capable of moving horizontally and capable of being clamped in the first clamping groove and the second clamping groove at the same time is arranged between the seat part and the seat connecting seat. A first inclined surface is arranged on the clamping piece in a circumferential direction. The backrest part is arranged between the seat part and the seat connecting seat. A protruding block is arranged at the lower end of the backrest part, and the protruding block is capable of pushing the first inclined surface when the backrest part is folded relative to the seat part. A second reset spring is arranged between the seat part and the clamping piece, and the second reset spring is capable of pushing the clamping piece to move and reset. A front handrail is arranged between the backrest part and the seat connecting seat. A plurality of third clamping grooves are arranged on the front handrail in a circumferential direction. Claws capable of being clamped in or separated from the third clamping grooves are arranged on the clamping piece. When the clamping piece is separated from the second clamping groove, the claws are separated from the third clamping grooves.

[0010] A protruding shaft capable of rotating relative to the seat connecting seat is arranged on the seat part. A pushing surface capable of pushing the linkage block to move is arranged on the protruding shaft.

[0011] The unlocking linkage piece comprises a sliding block capable of sliding relative to the seat connecting part and capable of being pushed by the linkage block. A protruding shaft is arranged on the sliding block. A connecting hole is arranged on the locking rod and movably connected with the protruding shaft. When the sliding block slides downward, the protruding shaft pushes the wall of the connecting hole to make the locking rod rotate.

[0012] The connecting hole is a non-circular hole. When the protruding shaft pushes the wall of the connecting hole, the protruding shaft can slide relative to the wall of the connecting hole.

[0013] The transmission piece comprises a transmission sheet. One end of the transmission sheet is pivotally connected to the first connecting seat. The rotation axis of the transmission sheet and the first connecting seat deviates from the rotation axis of the first connecting seat and the second connecting seat. The other end of the transmission sheet is pivotally connected to the third connecting seat. The rotation axis of the transmission sheet and the third connecting seat deviates from the rotation axis of the third connecting seat and the second connecting seat.

[0014] The locking rod comprises a curved body, the first clamping part is a clamping hook arranged at one end of the body and bent downward, the second clamping part is a protruding block arranged at the other end of the body and bent upward, and the first clamping position and the second clamping position are clamping grooves arranged on the outer circumferential surfaces of the first connecting seat and the third connecting seat.

[0015] The backrest part comprises a U-shaped backrest rod, the open end of the backrest rod is rotatably connected with the seat part, a rear side frame protruding rearward is arranged on the backrest rod, a support plate capable of sliding upward and downward relative to the rear side frame is arranged on the rear side frame, a mounting hole for passing through a safety belt is arranged on the support plate, and a positioning structure capable of positioning the position of the support plate is arranged between the support plate and the rear side frame.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] 1、the utility model discloses a child stroller frame when the child stroller is unfolded, the first clamping part of one end of the locking rod is clamped with the first clamping position on the first connecting seat, and at the same time, the second clamping part of the other end of the locking rod is clamped with the second clamping position on the third connecting seat, therefore, the locking rod locks the first connecting seat and the third connecting seat simultaneously, can reduce the shaking of the child stroller frame, and ensure safety and stability.

[0018] 2、the utility model discloses that the second connecting seat is provided with the seat connecting part for detachably connecting the seat part, and when the seat part is folded to the first support leg relative to the seat connecting seat, the linkage block in the seat connecting seat can trigger the unlocking linkage to move, so that the locking device is unlocked, therefore, only need to make the seat part rotate and fold to link the locking device and unlock, so that the unlocking operation of the child stroller frame is more convenient and fast.

[0019] 3、the utility model discloses that the support plate on the backrest part can be adjusted up and down, therefore, the height of the safety belt can be adjusted, so that children of different heights can wear the safety belt, and the wearing is comfortable.

DRAWINGS

[0020] Figure 1 It is the utility model's unfolded state perspective view;

[0021] Figure 2 It is the utility model's unfolded state side view.

[0022] Figure 3 is the perspective view of the utility model without seat component;

[0023] Figure 4 is Figure 3 the enlarged view of A in the middle;

[0024] Figure 5 is the side view of the utility model without seat component;

[0025] Figure 6 is one of the exploded view of the utility model parts;

[0026] Figure 7 is the second exploded view of the utility model parts;

[0027] Figure 8 is the sectional view of the utility model parts;

[0028] Figure 9 is the perspective view of the seat component of the utility model;

[0029] Figure 10 is the third exploded view of the utility model parts;

[0030] Figure 11 is the fourth exploded view of the utility model parts;

[0031] Figure 12 is the fifth exploded view of the utility model parts;

[0032] Figure 13 is the perspective view of the utility model locking piece;

[0033] Figure 14 is the sixth exploded view of the utility model parts;

[0034] Figure 15 is the perspective view of the utility model parts;

[0035] Figure 16 is the seventh exploded view of the utility model parts;

[0036] Figure 17 is the partial perspective view of the backrest rod of the utility model;

[0037] Figure 18 is the folding process side view of the seat component of the utility model in the forward position;

[0038] Figure 19 is the folded state perspective view of the seat component of the utility model in the forward position;

[0039] Figure 20is the side view of the unfolded state of the seat assembly of the utility model in the reverse position;

[0040] Figure 21 is the side view of the folding process of the seat assembly of the utility model in the reverse position;

[0041] Figure 22 is the perspective view of the folded state of the seat assembly of the utility model in the reverse position.

CONCRETE IMPLEMENTATIONS

[0042] The utility model will be further described in connection with the drawings:

[0043] As Figures 3 to 8 , and Figures 18 to 22 A child stroller frame can be moved from an unfolded position to a folded position after the locking device is unlocked, comprising a first supporting leg 11 and a second supporting leg 12 with wheels 10, the first supporting leg 11 is fixedly provided with a first connecting seat 21 at the upper end, the second supporting leg 12 is fixedly provided with a second connecting seat 22 at the upper end, the first connecting seat 21 and the second connecting seat 22 are rotatably connected, the second connecting seat 22 is rotatably connected with a third connecting seat 23, the third connecting seat 23 is fixedly connected with a push rod assembly 13, the push rod assembly 13 comprises a lower push rod 131 fixedly connected with the third connecting seat 23, the lower push rod 131 is provided with an upper push rod 132 capable of sliding relative thereto, the upper push rod 132 is provided with a hand push handle 133 at the upper end, the third connecting seat 23 and the first connecting seat 21 are provided with a transmission member 3 capable of driving the first supporting leg 11 to rotate and close to the second supporting leg 12 when the push rod assembly 13 rotates and closes to the second supporting leg 12, the transmission member 3 comprises a transmission sheet 31, one end of the transmission sheet 31 is pivoted on the first connecting seat 21, the transmission axis of the transmission sheet 31 and the first connecting seat 21 deviates from the transmission axis of the first connecting seat 21 and the second connecting seat 22, the other end of the transmission sheet 31 is pivoted on the third connecting seat 23, the transmission axis of the transmission sheet 31 and the third connecting seat 23 deviates from the transmission axis of the third connecting seat 23 and the second connecting seat 22. In the process of rotating the push rod assembly 13 to the second supporting leg 12, the third connecting seat 23 rotates relative to the second connecting seat 22 and rotates relative to the transmission sheet 31 at the eccentric position, thereby pulling the upper end of the transmission sheet 31, the transmission sheet 31 rotates relative to the first connecting seat 21 and pulls the first supporting leg 11 in the movement process, so that the first supporting leg 11 rotates relative to the second connecting seat 22, so that the push rod assembly 13 and the first supporting leg 11 are both closed to the second supporting leg 12, and the folding is flexible and reliable. The seat for children to ride can be a seat pocket connected to the push rod assembly 13, or a seat assembly 5 detachably connected to the second connecting seat 22 as in the embodiment.

[0044] As Figures 1 to 4 ,Figure 9 As shown in the figure, the second connecting seat 22 is provided with a seat connecting part 24, and the seat connecting part 24 is detachably connected with the seat assembly 5. The seat assembly 5 comprises a seat connecting seat 51 which is detachably connected with the seat connecting part 24. The seat connecting seat 51 is connected with a seat part 52 which is rotatable relative to the seat connecting seat 51. The seat part 52 and the seat connecting seat 51 are provided with a first locking assembly 53. The rear side of the seat part 52 is provided with a backrest part 55 which is rotatable relative to the seat part 52. The seat part 52 and the backrest part 55 are provided with a second locking assembly 56. The front side of the seat part 52 is further provided with a leg support frame 59 which is rotatable. When the child is riding, the child is seated on the seat part 52, and the backrest part 55 supports the back of the child.

[0045] As shown in the figure, Figures 1 to 8 , Figures 18 to 22 The locking device comprises a locking rod 40 which is rotatably connected with the second connecting seat 22. One end of the locking rod 40 is provided with a first locking part 41, and the other end of the locking rod 40 is provided with a second locking part 42. The first connecting seat 21 is provided with a first locking position 43 which is capable of being locked with the first locking part 41. The third connecting seat 23 is provided with a second locking position 44 which is capable of being locked with the second locking part 42 when the first locking part 41 and the first locking position 43 are locked. The second connecting seat 22 is further provided with an unlocking linkage 45 which is capable of triggering the rotation of the locking rod 40 so as to make the first locking position 43 and the first locking part 41 disengage, and the second locking position 44 and the second locking part 42 disengage. The locking device further comprises a first reset spring 46 which is connected with the second connecting seat 22 and is capable of pushing the locking rod 40 to rotate and reset. In this embodiment, the first reset spring 46 is a torsion spring, one end of which is connected with the locking rod 40, and the other end of which is connected with the second connecting seat 22.

[0046] As shown in the figure, Figures 1 to 8 , Figures 18 to 22As shown, the seat assembly 5 can be installed on the seat connecting part 24 in a forward direction or in a reverse direction. In the unfolded state of the stroller, the first locking part 41 at one end of the locking rod 40 is engaged with the first locking part 43 on the first connecting seat 21, while the second locking part 42 at the other end of the locking rod 40 is engaged with the second locking part 44 on the third connecting seat 23. Thus, the locking rod 40 locks the first connecting seat 21 and the third connecting seat 22 at the same time, reducing the shaking of the stroller frame due to the clearance between the rods, and ensuring safety and stability. When folding the stroller frame, the trigger locking rod 40 is driven to rotate by unlocking the linkage 45, so that the first locking part 41 is disengaged from the first locking part 43 and the second locking part 42 is disengaged from the second locking part 44. At this time, the push rod assembly 13 is driven by the transmission member 3 to rotate the first support leg 11 towards the second support leg 12 during the process of rotating the second support leg 12 towards each other, so that the push rod assembly 13 and the first support leg 11 are both folded to the second support leg 12, ensuring convenient folding operation. Therefore, the stroller frame has small shaking, is safe and reliable, and is convenient to fold and flexible to fold. Whether the seat assembly 5 is installed in the forward direction or in the reverse direction, the stroller frame can be conveniently folded.

[0047] As shown in the drawings, Figures 10 to 12 The seat connecting seat 51 is provided with a linkage block 54 that can trigger the unlocking linkage 45 to move when the seat part 52 is rotated and folded. When the stroller frame needs to be folded, first unlock the second locking assembly 56, and then the back part 55 is folded to the seat part 52, and then the first locking assembly 53 is unlocked, and the seat part 52 is rotated relative to the seat connecting seat 51. During the process of rotating and folding to the first support leg 11, the linkage block 54 in the seat connecting seat 51 pushes the trigger unlocking linkage 45 to move, so that the locking rod 40 rotates. At this time, the locking device is unlocked, and the stroller frame can be automatically folded. Therefore, the unlocking action of the locking device and the rotating action of the seat part 52 are linked to ensure that the stroller frame is convenient and fast to unlock. After the locking device is unlocked, the push rod assembly 13 can automatically rotate relative to the second support leg 12 and drive the first support leg 11 to automatically rotate and fold to the second support leg 12, realizing automatic folding, and folding is very flexible.

[0048] As shown in the drawings, Figures 10 to 12As shown, the seat part 52 is provided with a convex shaft 521 capable of rotating with the relative seat connecting seat 51, and the convex shaft 521 is provided with a pushing surface 522 capable of pushing the linkage block 54 to move when the convex shaft 521 rotates. When the seat part 52 rotates relative to the seat connecting seat 51, the convex shaft 521 rotates together, and the pushing surface 522 on the convex shaft 521 pushes the linkage block 54 to move downward, and the linkage block 54 pushes the unlocking linkage 45, so that the locking device is unlocked. Only the rotation of the seat part 52 to fold can achieve the unlocking of the locking device, and the user does not need to additionally operate the locking device to unlock, so that the folding of the stroller frame is convenient and fast.

[0049] As shown in Figure 6 and Figure 7 The unlocking linkage 45 includes a sliding block 451 capable of sliding relative to the seat connecting part 24 and capable of being pushed by the linkage block 54, the sliding block 451 is provided with a convex shaft 452, and the locking rod 40 is provided with a connecting hole 453 movably connected with the convex shaft 452. When the sliding block 451 slides downward, the convex shaft 452 pushes the wall of the connecting hole 453 to make the locking rod 40 rotate. The connecting hole 453 is a non-circular hole, and when the convex shaft 452 pushes the wall of the connecting hole 453, the convex shaft 452 can slide relative to the wall of the connecting hole 453. When the linkage block 54 pushes the sliding block 451 to slide downward, the convex shaft 452 pushes the wall of the connecting hole 453 and slides relative to the wall, so that the locking rod 40 can rotate relative to the second connecting seat 22, thereby achieving unlocking. Moreover, the linear motion of the sliding block 451 is converted into the rotary motion of the locking rod 40 through the cooperation of the convex shaft 452 and the connecting hole 453, which is a clever design.

[0050] As shown in Figures 6 to 8 The locking rod 40 includes a curved body 401, the first locking part 41 is a hook provided on one end of the body 401 and bent downward, the second locking part 42 is a protruding block provided on the other end of the body 401 and bent upward, and the first locking position 43 and the second locking position 44 are clamping grooves provided on the outer circumferential surfaces of the first connecting seat 21 and the third connecting seat 23. The hook clamps the clamping groove on the first connecting seat 21 downward, and the protruding block clamps the clamping groove on the third connecting seat 23 upward, so that the stroller frame is locked very firmly in the unfolded state, and the shaking of the stroller frame is reduced, which is safe and reliable.

[0051] As shown in Figure 11 and Figure 12As shown, the second locking assembly 56 comprises a locking groove (not shown) provided on the seat part 52, a locking shaft 561 provided in the backrest part 55 and slidable in the backrest part 55 to engage with or disengage from the locking groove, a switch 562 provided on the backrest part 55, a pull rope 563 provided between the switch 562 and the locking shaft 561 and capable of pulling the locking shaft 561 to disengage from the locking groove, and a fourth reset spring 564 provided in the backrest part 55 and capable of pushing the locking shaft 561 to slide and reset. Pulling the pull rope 563 by operating the switch 562 can disengage the locking shaft 561 from the locking groove, thus unlocking the second locking assembly 56, and the folding backrest part 55 can be rotated at this time. The locking groove can be multiple and provided on the seat part 52 in the circumferential direction, thus further adjusting different inclination positions of the backrest part 55.

[0052] As shown in Figures 11 to 13 , the first locking assembly 53 comprises a first locking groove 531 provided on the seat part 52 in the circumferential direction, a second locking groove 532 provided on the seat connecting base 51 in the circumferential direction, a locking piece 533 provided between the seat part 52 and the seat connecting base 51 and capable of moving horizontally and engaging with the first locking groove 531 and the second locking groove 532 at the same time, a first inclined surface 534 provided on the locking piece 533 in the circumferential direction, the backrest part 55 provided between the seat part 52 and the seat connecting base 51, a protrusion 57 provided at the lower end of the backrest part 55 and capable of pushing the first inclined surface 534 when the backrest part 55 is rotated and folded relative to the seat part 52, thus making the locking piece 533 disengage from the second locking groove 532, and a second reset spring 535 provided between the seat part 52 and the locking piece 533 and capable of pushing the locking piece 533 to move and reset. When the backrest part 55 is rotated and folded, the protrusion 57 on the backrest part 55 pushes the first inclined surface 534, thus making the locking piece 533 disengage from the second locking groove 532, at this time the first locking assembly 53 is unlocked, and the seat part 52 can be rotated relative to the seat connecting base 51 to move towards the first leg 11. In this disengaging process, the linkage block 54 can trigger the unlocking linkage 45, thus unlocking the locking device.

[0053] As shown in Figure 1 , Figure 9 , Figure 11 , and Figure 12 , the backrest part 55 and the seat connecting base 51 are provided with a front armrest 58, the front armrest 58 is provided with a plurality of third locking grooves 536 in the circumferential direction, the locking piece 533 is provided with a locking tooth 537 capable of engaging with or disengaging from the third locking groove 536, and when the locking piece 533 disengages from the second locking groove 532, the locking tooth 537 disengages from the third locking groove 536. Therefore, when the backrest part 55 is rotated and folded to push the locking piece 533 to disengage from the second locking groove 532, the locking tooth 537 also disengages from the third locking groove 536, so that the front armrest 58 can also be rotated and folded.

[0054] As shown in Figures 10 to 12 , the seat connecting seat 51 is connected with the seat connecting part 24 by plug-in connection, the seat connecting part 24 is provided with a slot 241 for the insertion of the seat connecting seat 51, and the seat connecting part 24 is further provided with a transverse clamping hole 242, the seat connecting seat 51 is provided with a clamping block 511 which can move transversely to be clamped with or separated from the clamping hole 242, and the seat connecting seat 51 is further provided with a button 512 which is exposed and can push the clamping block 511 to separate from the clamping hole 242 when pressed, and the seat connecting seat 51 and the clamping block 511 are provided with a third reset spring 513 which can push the clamping block 511 to slide and reset.

[0055] As shown in Figure 9 , Figures 14 to 16 , the backrest part 55 includes a U-shaped backrest rod 551, the backrest rod 551 is provided with a rotatable ceiling support frame 555, the open end of the backrest rod 551 is rotatably connected with the seat part 52, the backrest rod 551 is provided with a rear side frame 552 which protrudes backward, the rear side frame 552 is provided with a support plate 553 which can slide up and down relative thereto, the support plate 553 is provided with a mounting hole 554 for the threading of a safety belt, and the support plate 553 and the rear side frame 552 are provided with a positioning structure which can position the support plate 553. The support plate 553 can be adjusted in height, so that the threading of the safety belt can also be adjusted in height, which can ensure that children of different heights can comfortably wear the safety belt when riding, for example, the support plate 553 is adjusted to be high when a child of high stature rides, and the support plate 553 is adjusted to be low when a child of small stature rides.

[0056] As shown in Figures 14 to 16 , the positioning structure includes an extension slot 501 which extends up and down along the rear side frame 552, the two side walls of the extension slot 501 are provided with a plurality of mutually spaced positioning slots 502, the support plate 553 is provided with a protruding seat 503 which is inserted into the extension slot 501 and can slide up and down in the extension slot 501, and the protruding seat 503 is provided with a protrusion 504 which can be positioned with the positioning slots 502. When the protrusion 504 is clamped with one of the positioning slots 502, the height of the support plate 553 is positioned, and when adjustment is needed, the support plate 553 is only slightly pulled up and down with force, so that the protrusion 504 exits from one positioning slot 502 and enters another positioning slot 502, which is convenient for adjustment.

[0057] As shown in Figure 9 , Figure 14 and Figure 16As shown, the rear frame 552 comprises an extension frame 5521 extending upward and downward, the extension frame 5521 is provided with a left side frame 5522 and a right side frame 5523 extending to both sides at the lower end, the left side frame 5522 and the right side frame 5523 are connected to the lower side of the backrest rod 551, the upper end of the extension frame 5521 is connected to the upper end of the backrest rod 551, and the extension slot 501 is arranged on the extension frame 5521.

[0058] As shown in the drawings, Figure 17 Figure 18 The backrest rod 551 is provided with a T-shaped insertion seat 5511, the left side frame 5522 and the right side frame 5523 are provided with an insertion slot (not shown in the figure) capable of being inserted and matched with the insertion seat 5511, the upper end of the extension frame 5521 is provided with a curved portion 5525, when the left side frame 5522 and the right side frame 5523 are inserted with the insertion seat 5511, the lower side of the curved portion 5525 is attached to the upper end surface of the backrest rod 551, the whole structure is firm and convenient to assemble, and when the curved portion 5525 is attached to the upper end surface of the backrest rod 551, it can be locked by a screw.

[0059] In this embodiment, when the stroller frame needs to be folded, the upper push rod 132 is first slid to make the upper push rod 132 retract into the lower push rod 131, and then the switch 562 is operated to make the second locking assembly 56 unlocked and rotate the folding backrest 55 forward, the backrest 55 drives the first locking assembly 53 to be unlocked during the rotating and folding process, at this time, the seat 52 rotates relative to the seat connecting seat 51, and the seat 52 moves the linkage block 54 by pushing the top pushing surface 522 during the rotating process, the linkage block 54 pushes the unlocking linkage 45 to move, so that the locking device of the stroller frame is unlocked, and after the locking device is unlocked, the push rod assembly 13 rotates relative to the second leg 12 under the action of its own gravity, in this process, the first leg 11 is brought closer to the second leg 12 by the transmission piece 31, and finally the wheels 10 and the hand push handle 133 are abutted on the ground, so that the folded stroller frame is kept standing. Only by sliding the upper push rod 132 and rotating the backrest 55 forward to fold can the stroller frame be automatically folded and kept standing, and the whole folding process is very simple.

[0060] The above embodiment is described in detail 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 ordinary skilled persons in the technical field without departing from the purpose of the utility model.

Claims

1. A child's pushchair frame which is movable from an unfolded position to a folded position after unlocking of a locking device, characterised in that: The utility model provides a kind of foldable seat, including first leg (11) and second leg (12) with wheel (10), the upper end of first leg (11) is fixed with first connecting seat (21), the upper end of second leg (12) is fixed with second connecting seat (22), first connecting seat (21) is rotatably connected with second connecting seat (22), third connecting seat (23) is rotatably connected on second connecting seat (22), third connecting seat (23) is fixedly connected with push rod assembly (13), transmission member (3) is arranged between third connecting seat (23) and first connecting seat (21) and can drive first leg (11) to rotate and close to second leg (12) when push rod assembly (13) rotates and closes to second leg (12), the locking device includes the locking rod (40) rotatably connected in second connecting seat (22), the one end of locking rod (40) is equipped with first locking part (41), the other end of locking rod (40) is equipped with second locking part (42), first connecting seat (21) is equipped with the first clamping position (43) that can be engaged with first locking part (41), third connecting seat (23) is equipped with the second clamping position (44) that can be engaged with second locking part (42) when first locking part (41) and first clamping position (43) are engaged, second connecting seat (22) is further equipped with the unlocking linkage (45) that can trigger the rotation of locking rod (40) to make first clamping position (43) and first locking part (41) disengage and second clamping position (44) and second locking part (42) disengage, the locking device further includes first reset spring (46) connected on second connecting seat (22) and can push locking rod (40) to rotate reset.

2. The child's pushchair frame of claim 1, wherein: Second connecting seat (22) is equipped with seat connecting portion (24), seat connecting portion (24) is detachably connected with seat assembly (5), seat assembly (5) includes seat connecting seat (51) detachably connected with seat connecting portion (24), seat connecting seat (51) is connected with seat part (52) that can rotate relative thereto, first locking assembly (53) is arranged between seat part (52) and seat connecting seat (51), linkage block (54) is arranged in seat connecting seat (51) and can trigger unlocking linkage (45) to move when seat part (52) rotates and folds.

3. The stroller frame of claim 2, wherein: The rear side of seat part (52) is equipped with backrest part (55) that can rotate relative thereto, second locking assembly (56) is arranged between backrest part (55) and seat part (52).

4. The stroller frame of claim 3, wherein: The first clamping assembly (53) comprises a first clamping groove (531) arranged on the seat part (52) in the circumferential direction, the seat connecting base (51) is arranged with a second clamping groove (532) in the circumferential direction, the seat part (52) and the seat connecting base (51) are arranged with a clamping piece (533) capable of moving transversely and capable of being clamped with the first clamping groove (531) and the second clamping groove (532) at the same time, the clamping piece (533) is arranged with a first inclined surface (534) in the circumferential direction, the backrest part (55) is arranged between the seat part (52) and the seat connecting base (51), the lower end of the backrest part (55) is arranged with a protruding block (57) capable of pushing the first inclined surface (534) when the seat part (52) is rotated and folded, so as to make the clamping piece (533) and the second clamping groove (532) disengage, the seat part (52) and the clamping piece (533) are further arranged with a second reset spring (535) capable of pushing the clamping piece (533) to move and reset, the backrest part (55) and the seat connecting base (51) are arranged with a front handrail (58), the front handrail (58) is arranged with a plurality of third clamping grooves (536) in the circumferential direction, the clamping piece (533) is arranged with a clamping tooth (537) capable of being clamped with or disengaged from the third clamping groove (536), and when the clamping piece (533) and the second clamping groove (532) disengage, the clamping tooth (537) and the third clamping groove (536) disengage.

5. The child's buggy frame of claim 2, wherein: The seat part (52) is arranged with a convex shaft (521) capable of rotating relative to the seat connecting base (51), and the convex shaft (521) is arranged with a pushing surface (522) capable of pushing the linkage block (54) to move when the convex shaft (521) rotates.

6. The child's buggy frame of claim 2, wherein: The unlocking linkage (45) comprises a sliding block (451) capable of sliding relative to the seat connecting part (24) and capable of being pushed by the linkage block (54), the sliding block (451) is arranged with a convex shaft (452), the locking rod (40) is arranged with a connecting hole (453) movably connected with the convex shaft (452), when the sliding block (451) slides downward, the convex shaft (452) pushes the hole wall of the connecting hole (453) to make the locking rod (40) rotate.

7. The stroller frame of claim 6, wherein: The connecting hole (453) is a non-circular hole, and when the convex shaft (452) pushes the hole wall of the connecting hole (453), the convex shaft (452) can slide relative to the hole wall of the connecting hole (453).

8. The child's vehicle frame according to any one of claims 1 to 7, characterized in that: The transmission member (3) comprises a transmission piece (31), one end of the transmission piece (31) is pivoted on the first connecting base (21), the rotation axis of the transmission piece (31) and the first connecting base (21) deviates from the rotation axis of the first connecting base (21) and the second connecting base (22), the other end of the transmission piece (31) is pivoted on the third connecting base (23), the rotation axis of the transmission piece (31) and the third connecting base (23) deviates from the rotation axis of the third connecting base (23) and the second connecting base (22).

9. The child's vehicle frame according to any one of claims 1 to 7, characterized in that: The locking rod (40) comprises a bent body (401), the first locking part (41) is a hook arranged at one end of the body (401) and bent downward, the second locking part (42) is a protruding block arranged at the other end of the body (401) and bent upward, and the first clamping position (43) and the second clamping position (44) are clamping grooves arranged on the outer circumferential surfaces of the first connecting seat (21) and the third connecting seat (23).

10. The child's buggy frame of claim 3, wherein: The backrest part (55) comprises a U-shaped backrest rod (551), the open end of the backrest rod (551) is rotatably connected with the seat part (52), a rear side frame (552) protruding rearward is arranged on the backrest rod (551), a support plate (553) capable of sliding upward and downward relative to the rear side frame (552) is arranged on the rear side frame (552), a mounting hole (554) for passing a safety belt is arranged on the support plate (553), and a positioning structure capable of positioning the position of the support plate (553) is arranged between the support plate (553) and the rear side frame (552).

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