Stroller frame

Abstract

The utility model discloses a child's shallow frame, is fixed with the connecting seat on rear support rod upper end, is fixed with the first connecting part on front support rod upper end, is fixed with the second connecting part at push rod subassembly lower extreme, is equipped with the clamping seat in the connecting seat inboard, is connected with the seat subassembly on the clamping seat, and the seat subassembly includes the mounting seat, is connected with the seat part on the mounting seat, the first connecting part is rotatively connected with the connecting seat, the second connecting part is rotatively connected with the connecting seat, and the first connecting part is equipped with the linkage lever between the second connecting part, is equipped with the locking groove on the second connecting part, rotatively connected with the rotary sheet on the connecting seat, and the rotary sheet one end is equipped with the locking hook, and the other end is equipped with the first reset spring between the connecting seat, still be connected with the unlocking piece of the rotary sheet when can drive the rotary sheet rotation unlocking when sliding down, is equipped with the jacking part of the seat part to push the unlocking piece sliding. The utility model discloses simple structure, and the nimble folding.

Description

[Technical Field]

[0001] This utility model relates to a children's stroller frame. [Background Technology]

[0002] Strollers are a common product during a child's growth. Most current strollers can be unfolded or folded; when unfolded, they provide a comfortable ride for children, while when folded, they are easy to carry or store. However, the structures and folding principles of stroller frames vary widely on the market. Therefore, this invention provides a novel stroller frame that differs from existing ones. [Utility Model Content]

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a child stroller frame that is simple in structure and flexible in folding.

[0004] This utility model is achieved through the following technical solution:

[0005] A stroller frame includes a push rod assembly and front and rear support rods, each connected to a wheel. A connecting seat is fixedly mounted on the upper end of the rear support rod, a first connecting part is fixedly mounted on the upper end of the front support rod, and a second connecting part is fixedly mounted on the lower end of the push rod assembly. A snap-fit ​​seat is provided inside the connecting seat, and a seat assembly is connected to the snap-fit ​​seat. The seat assembly includes a mounting base detachably connected to the snap-fit ​​seat, and a seat portion rotatable relative to the mounting base. The first connecting part is rotatably connected to the connecting base about a first axis, and the second connecting part is rotatably connected to the connecting base about a second axis. The first connecting part and the second connecting part are connected... The device is equipped with a linkage rod that is rotatably connected to both of the two components and can drive the front support rod to rotate towards the rear support rod when the push rod assembly rotates and approaches relative to the rear support rod. The second connecting part is provided with a locking groove, and a rotating plate is rotatably connected to the connecting seat. One end of the rotating plate is provided with a locking hook that can engage or disengage with the locking groove. The other end of the rotating plate is provided with a first return spring that can drive the rotating plate to reset between the two ends and the connecting seat. The rotating plate is also connected with an unlocking component that is exposed to the connecting seat and can drive the rotating plate to rotate and unlock when sliding downward. The seat part is provided with a push part that can push the unlocking component to slide when it rotates downward relative to the mounting seat.

[0006] The unlocking component includes a body, with a locking pin at the upper end that engages with a locking hole on the rotating plate, and a mating block at the lower end that protrudes from the connecting seat and engages with the pushing part. A second return spring is provided between the connecting seat and the unlocking component to push the unlocking component upwards to reset.

[0007] The front support rod has a front crossbar at its lower end, and the rear support rod has a rear crossbar at its lower end. The front crossbar has a rotating rod that can rotate relative to it. There is a flexible band between the rotating rod and the rear crossbar that can pull the rotating rod up when the stroller frame is in the unfolded state. There is also a torsion spring between the rotating rod and the front crossbar that can push the rotating rod to unfold when the stroller frame is folded up. When the stroller frame is in the folded state, the rotating rod rests against the ground and together with the wheels, keeps the folded stroller frame in an upright position.

[0008] An auxiliary spring is provided between the front support rod and the rear support rod to provide assistance in their relative rotation and bringing them closer together. When the stroller frame is unfolded, the auxiliary spring is in a deformed and elongated state.

[0009] The seat assembly also includes a backrest and armrests that are rotatably connected to the rear end of the seat. A locking mechanism is provided between the mounting base, the seat, the backrest and the armrests to lock the seat assembly in the unfolded state.

[0010] The pusher includes a pusher block that is slidably connected to the seat and can push the unlocking member to slide when the seat is downward relative to the mounting seat. An elastic reset element that can push the pusher block to reset is provided between the pusher block and the seat. The pusher block is provided with a first inclined surface. The mating block is provided with a pusher surface that can push the first inclined surface when the seat is rotated upward and unfolded, so that the pusher block retracts into the seat.

[0011] A locking assembly is provided between the mounting base and the snap-fit ​​base to lock the two together. The locking assembly includes a snap-fit ​​position on the snap-fit ​​base, a snap-fit ​​block on the mounting base that can slide laterally relative to it and snap into or out of the snap-fit ​​position, and an operating member connected to the mounting base that can slide vertically relative to it and push the snap-fit ​​block to slide laterally. A first elastic element is provided between the snap-fit ​​block and the mounting base to push the snap-fit ​​block to reset, and a second elastic element is provided between the operating member and the mounting base to push the operating member to reset.

[0012] The operating components include a button exposed on the mounting base, a vertical rod connected to the button that can push the locking block to move, an elastic hook on one side of the lower end of the vertical rod, and a locking hook on the other side of the lower end of the vertical rod. A boss is provided on the locking base and below the locking position. When the locking block is engaged with the locking position, the elastic hook and the locking hook are squeezed by the outer surface of the mounting base and the boss and are in an elastic deformation state. When the vertical rod moves downward and the locking block is disengaged from the locking position, the elastic hook elastically returns and pushes the locking hook to hook the lower surface of the boss so that the disengaged state of the locking block and the locking position is maintained.

[0013] The seat has a left connecting shell, and the mounting base has a right connecting shell. The locking assembly includes spline grooves on the left and right connecting shells. A spline is provided between the left and right connecting shells that can engage with the spline grooves on the left and right connecting shells simultaneously. A third return spring is also provided between the spline and the right connecting shell. The backrest has a protruding open ring. The inner wall of the open ring has a push protrusion that can push the spline out of the spline groove on the left connecting shell when the backrest is rotated and folded. The spline is partially embedded in the open ring and has a helical surface that can be pushed by the push protrusion. The spline also has a protruding bump. The armrest has a locking groove that can engage or disengage with the bump. The sliding distance of the spline is set to ensure that when the push protrusion pushes the spline to a position that can disengage the bump from the locking groove, the spline remains engaged with the spline groove on the left connecting shell.

[0014] Compared with existing technologies, this invention has the following advantages: When folding, the seat part is first rotated downwards relative to the mounting base. During this rotation, the pusher on the seat part pushes the unlocking component downwards, which in turn pulls the rotating piece to rotate relative to the connecting base, causing the locking hook to disengage from the locking groove. Once disengaged, the second connecting part and its push rod assembly can rotate relative to the connecting base and move towards the rear support rod. During this process, the second connecting part pulls the first connecting part to rotate relative to the connecting base via a linkage rod, causing the front support rod on the first connecting part to rotate towards the rear support rod. Therefore, simply rotating the seat part downwards disengages the locking hook from the locking groove, making the folding operation of the stroller frame convenient and quick, and the overall stroller frame structure is also very simple. [Attached Image Description]

[0015] Figure 1 This is a perspective view of the utility model;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is an exploded view of the present invention;

[0018] Figure 4 yes Figure 3 Enlarged view at point C;

[0019] Figure 5 yes Figure 3 Enlarged view at point D;

[0020] Figure 6 This is one of the exploded views of the component of this utility model;

[0021] Figure 7 yes Figure 6 Enlarged view at point E in the middle;

[0022] Figure 8 This is the second exploded view of a component of this utility model;

[0023] Figure 9 This is the third exploded view of the component of this utility model;

[0024] Figure 10 This is a side view of the present invention during the folding process;

[0025] Figure 11 This is a side view of the folded state of this utility model;

[0026] Figure 12 This is the fourth exploded view of the component of this utility model;

[0027] Figure 13 This is the fifth exploded view of the component of this utility model;

[0028] Figure 14 It is a 3D diagram of a spline;

[0029] Figure 15 This is a partial diagram of the backrest;

[0030] Figure 16 This is a partial schematic diagram of the operating component;

[0031] Figure 17 This is a perspective view of a component of this utility model;

[0032] Figure 18 This is the sixth exploded view of the component of this utility model.

Detailed Implementation Methods

[0033] like Figures 1 to 6 As shown, the stroller frame mainly includes a push rod assembly 1, a front support rod 2, a rear support rod 3, and a seat assembly 4. A second connecting part 11 is fixedly provided at the lower end of the push rod assembly 1. A wheel 10 is provided at the lower end of the front support rod 2, a first connecting part 21 is fixedly provided at its upper end, and a front crossbar 22 is also provided at its lower end. Similarly, a wheel 10 is provided at the lower end of the rear support rod 3, a connecting seat 31 is fixedly provided at its upper end, and a rear crossbar 33 is provided at its lower end. A snap-fit ​​seat 32 is provided on the inner side of the connecting seat 31, which is used to connect the seat assembly 4.

[0034] like Figure 2 ,as well as Figures 7 to 9 As shown, the first connecting part 21 is rotatably connected to the connecting seat 31 around the first axis A, and the second connecting part 11 is rotatably connected to the connecting seat 31 around the second axis B. To achieve the coordinated folding of the stroller frame, a linkage rod 5 is provided between the first connecting part 21 and the second connecting part 11, with both ends of the linkage rod 5 rotatably connected to the first connecting part 21 and the second connecting part 11, respectively. When the push rod assembly 1 is rotated towards the rear support rod 3, the front support rod 2 can be synchronously rotated towards the rear support rod 3 through the transmission of the linkage rod 5, thereby achieving folding.

[0035] like Figures 7 to 9 As shown, to lock the stroller frame in the unfolded state, a locking groove 61 is provided on the second connecting part 11. A rotating plate 62 is rotatably connected to the connecting seat 31. One end of the rotating plate 62 is provided with a locking hook 63 that can engage or disengage from the locking groove 61, and the other end is provided with a first return spring 64 between it and the connecting seat 31. The first return spring 64 provides a driving force, causing the rotating plate 62 to rotate and tend to engage the locking hook 63 into the locking groove 61, thereby achieving locking. In this embodiment, the first return spring 64 is a tension spring. When the locking hook engages with the locking groove 61, the tension spring is in its initial state. When the locking hook 63 disengages from the locking groove 61, the tension spring is stretched and deformed. An unlocking member 65 is also connected to the rotating plate 62, and part of the unlocking member 65 is exposed outside the connecting seat 31. When the unlocking member 65 is slid downward, it can drive the rotating plate 62 to rotate, thereby disengaging the locking hook 63 from the locking groove 61 and achieving unlocking. A second return spring 66 is also provided between the connecting seat 31 and the unlocking member 65, which is used to push the unlocking member 65 upward to reset when there is no external force. Specifically, the unlocking member 65 includes a body 651, and a locking post 652 is provided at the upper end of the body 651. The locking post 652 is engaged with the locking hole 621 on the rotating plate 62. A mating block 653 is provided at the lower end of the body 651. The mating block 653 is exposed outside the connecting seat 31 and is used to cooperate with the pushing part 44 described later.

[0036] like Figure 3 , Figure 12 and Figure 13 As shown, the seat assembly 4 is detachably connected to the latching seat 32. The seat assembly 4 includes a mounting base 41, a seat portion 42, a backrest 43, and an armrest portion 45. The mounting base 41 is detachably connected to the latching seat 32. The seat portion 42 is rotatably connected to the mounting base 41. The backrest 43 is connected to the rear end of the seat portion 42 and can rotate relative to the seat portion 42. The armrest portion 45 is rotatably connected to the rear end of the seat portion 42. To lock the seat assembly 4 in the unfolded state, a locking assembly 46 is provided between the mounting base 41, the seat portion 42, the backrest 43, and the armrest portion 45.

[0037] like Figures 4 to 12As shown, a pushing part 44 is provided on the seat portion 42. When the seat portion 42 rotates downward relative to the mounting base 41, the pushing part 44 can push the unlocking member 65 downward, thereby disengaging the locking hook 63 from the locking groove 61. Specifically, the pushing part 44 includes a pushing block 441 slidably connected to the seat portion 42, and an elastic reset element 442 is provided between the pushing block 441 and the seat portion 42. A first inclined surface 443 is formed on the pushing block 441. Correspondingly, a pushing surface 654 is formed on the mating block 653 at the lower end of the unlocking member 65. When the stroller frame moves from the unfolded position to the folded position, the push block 441 moves from the front side of the mating block 653 to the rear side of the mating block. Therefore, when the seat part 42 rotates upward from the folded position to unfold, the push surface 654 pushes against the first inclined surface 443, causing the push block 441 to retract into the seat part 42, avoiding interference during the unfolding process. When the seat part 42 rotates upward and the push part 44 passes the mating block 653, the push block 441 extends under the action of the elastic reset element 442. When folded again, the push block 441 pushes against the mating block 653 as it rotates downward with the seat part 42, causing the unlocking member 65 to slide down.

[0038] like Figure 4 , Figure 5 and Figure 12 As shown, a locking assembly is provided to lock and unlock the mounting base 41 and the latching seat 32. The locking assembly includes a latching position 71 on the latching seat 32. A latching block 72 that can slide laterally relative to the mounting base 41 is provided, which can engage or disengage from the latching position 71. An operating member 73 that can slide vertically relative to the mounting base 41 is also connected to the mounting base 41. A first elastic element 74 is provided between the latching block 72 and the mounting base 41 for pushing the latching block 72 back to the latching position. A second elastic element 75 is provided between the operating member 73 and the mounting base 41 for pushing the operating member 73 back to its original position. Pressing the operating member 73 can push the latching block 72 away from the latching position 71, so that the seat assembly 4 can be disassembled.

[0039] like Figure 12 , 13 and Figure 16As shown, the operating component 73 includes a button 731 exposed on the mounting base 41, with a vertical rod 732 connected to the button 731. A resilient hook 733 is provided on one side of the lower end of the vertical rod 732, and a latching hook 734 is provided on the other side. A boss 76 is provided on the locking base 32 and below the locking position 71. When the locking block 72 engages with the locking position 71, the resilient hook 733 and the latching hook 734 are elastically deformed by the outer surfaces of the mounting base 41 and the boss 76. When the button 731 is pressed, causing the locking block 72 to disengage from the locking position 71, the resilient hook 733 elastically returns to its original position and pushes the latching hook 734, causing it to hook onto the lower surface of the boss 76. This maintains the disengaged state of the locking block 72 from the locking position 71, allowing the user to release the button 731 and free their hand to remove the entire seat assembly 4. Because the elastic hook 733 is elastic, when the seat assembly 4 is lifted upward and an external force is applied, the position of the latch 734 and the elastic hook 733 will be elastically deformed under the force, thereby causing the latch 734 to slide relative to the lower surface of the boss 76 and disengage.

[0040] like Figure 1 , Figure 12 and Figure 13 As shown, a gear adjustment structure is provided to adjust the tilt angle of the backrest 43. This gear adjustment structure includes multiple adjustment slots 81 symmetrically arranged on the seat portion 42. A sliding block 82 is provided on the backrest 43, which can slide relative to it. The sliding block 82 has a locking block 821 that can engage with the adjustment slot 81. A handle 83 is also provided on the backrest 43, which can rotate relative to it. A pull rope 84 connects the handle 83 and the sliding block 82. When the handle 83 is rotated, the pull rope 84 pulls the sliding block 82 upwards, causing the locking block 821 to disengage from the current adjustment slot 81. A second return spring 85 is provided between the sliding block 82 and the backrest 43. When the handle 83 is released, under the action of the second return spring 85, the sliding block 82 slides downwards, causing the locking block 821 to engage with another adjustment slot 81, thus achieving gear adjustment. When it is necessary to fold the backrest 43, simply turn the handle 83 to disengage the locking block 821 from the adjustment slot 81, and then turn the backrest 43 forward.

[0041] like Figure 17 and Figure 18 As shown, to ensure safety and prevent misoperation, a double-locking structure 9 is provided between the handle 83 and the backrest 43, including an unlocking button 91 slidably mounted on the handle 83. The unlocking button 91 has a protrusion 92. The backrest 43 has a blocking surface 47 that abuts against the protrusion 92, and a clearance groove 48 that makes way for the protrusion 92. In the initial state, the blocking surface 47 abuts against the protrusion 92, preventing the handle 83 from rotating. Only when the unlocking button 91 is slid to align the protrusion 92 with the clearance groove 48 can the handle 83 be rotated to disengage the locking block 821 from the adjusting groove 81. An elastic element 93 is provided between the unlocking button 91 and the handle 83 to push the unlocking button 91 back to its original position.

[0042] like Figure 1 , Figure 3 and Figure 11 As shown, a rotating rod 23 is provided on the front crossbar 22, which can rotate relative to it. A flexible belt 24 is provided between the rotating rod 23 and the rear crossbar 33. When the stroller frame is in the unfolded state, the flexible belt 24 pulls up the rotating rod 23. A torsion spring 25 is also provided between the rotating rod 23 and the front crossbar 22. When the stroller frame is folded, under the elastic force of the torsion spring 25, the rotating rod 23 unfolds and rests against the ground 101, forming a support together with the wheels 10, so that the stroller frame can maintain an upright posture in the folded state.

[0043] like Figure 1 and Figure 2 As shown, an auxiliary spring 7 is also provided between the front support rod 2 and the rear support rod 3. When the stroller frame is in the unfolded state, the auxiliary spring 7 is in a deformed and extended state, and its elasticity can provide auxiliary force when the front support rod 2 and the rear support rod 3 rotate relative to each other and come together, so as to make the folding and closing smooth.

[0044] like Figures 12 to 15As shown, the seat portion 42 has a left connecting shell 461, the mounting base 41 has a right connecting shell 462, the locking assembly 46 includes a spline groove 463 provided on the left connecting shell 461 and the right connecting shell 462, a spline 464 is provided between the left connecting shell 461 and the right connecting shell 462, which can move laterally within it and can simultaneously engage with the spline groove 463 on the left connecting shell 461 and the right connecting shell 462, a third return spring 465 is also provided between the spline 464 and the right connecting shell 462, and a protruding open ring 460 is provided on the backrest 43, the inner wall of the open ring 460 is provided with a spline that can push when the backrest 43 is rotated and folded. 464 disengages from the push protrusion 466 of the spline groove 463 on the left connecting shell 461. The spline 464 is partially embedded in the open ring 460 and has a spiral surface 467 that can be pushed by the push protrusion 466. The spline 464 also has a protruding bump 468. The armrest part 45 has a locking groove 469 that can engage or disengage with the bump 468. The sliding distance of the spline 464 is set to ensure that when the push protrusion 466 pushes the spline 464 to slide to a position that allows the bump 468 to disengage from the locking groove 469, the spline 464 remains engaged with the spline groove 463 on the left connecting shell 461. Specifically, as the backrest 43 rotates towards the seat 42, the push protrusion 466 pushes the helical surface 467 on the spline 464, thereby pushing the spline 464 to slide laterally. After the spline 464 slides a certain distance, the protrusion 468 on it disengages from the locking groove 469, and the armrest 45 rotates downwards and approaches the seat 42. At this time, the spline 464 and the spline groove 463 on the left connecting shell 461 are still engaged, and the seat 42 and the mounting base 41 are still locked. If the backrest 43 continues to rotate, the push protrusion 466 will continue to push the spline 464 to slide. After the spline 464 continues to slide a certain distance, the spline 464 disengages from the spline groove 463 on the left connecting shell 461. At this time, the seat 42 can rotate relative to the mounting base 41 and approach the front support rod 1, and the third return spring 465 is compressed.

[0045] When unfolding the stroller frame, the push rod assembly 1 is first rotated relative to the rear support rod 3 to unfold. During this process, the front support rod 2 is driven to unfold relative to the rear support rod 3 via the linkage rod 5. When unfolded to the set position, the originally deformed first return spring 64 drives the rotating plate 62 to reset, so that the locking hook 63 engages with the locking groove 61 again. Next, the seat assembly 4 is unfolded. The backrest 43 is first rotated upward to unfold. When the locking block 821 is aligned with the adjustment groove 81, the second return spring 85 pushes the sliding block 82 to move, so that the locking block 821 engages with the adjustment groove 81. Next, continue to pull the backrest 43 upward. The backrest 43 will then drive the seat 42 to rotate upward relative to the mounting base 41. When the seat 42 rotates upward until the spline 464 aligns with the spline groove 463 on it, the third return spring 465 pushes the spline 464 to return to its original position. The spline 464 engages with the spline groove 463 on the seat 42, and the seat 42 unfolds and locks. However, at this time, the protrusion 468 and the side of the armrest 45 are still abutting. Then, operate the armrest 45 to rotate upward until the protrusion 468 aligns with the locking groove 469. At this time, the third return spring 465 rebounds further, causing the protrusion 468 to engage with the locking groove 469, and also causing the spline 464 to engage more deeply with the spline groove 463 on the seat 42. Therefore, the specific setting of the aforementioned sliding distance of the spline 464 avoids the inconvenience caused by having to operate the seat 42 and the armrest 45 to rotate simultaneously when the stroller frame unfolds. This demonstrates that the entire stroller frame folds and unfolds smoothly and flexibly, making it suitable for widespread application.

Claims

1. A stroller frame, characterized in that: The assembly includes a push rod assembly (1) and a front support rod (2) and a rear support rod (3), both connected to wheels (10). A connecting seat (31) is fixedly provided at the upper end of the rear support rod (3). A first connecting part (21) is fixedly provided at the upper end of the front support rod (2). A second connecting part (11) is fixedly provided at the lower end of the push rod assembly (1). A snap-fit ​​seat (32) is provided inside the connecting seat (31). A seat assembly (4) is connected to the snap-fit ​​seat (32). The seat assembly (4) includes a mounting seat (41) detachably connected to the snap-fit ​​seat (32). A seat part (42) rotatably connected to the mounting seat (41) is connected to the mounting seat (41). The first connecting part (21) is rotatably connected to the connecting seat (31) around a first axis (A). The second connecting part (11) is rotatably connected to the connecting seat (31) around a second axis (B). The first connecting part (21) and the second connecting part (11) are connected... A linkage rod (5) is provided that is rotatably connected to both of them and can drive the front support rod (2) to rotate and move closer to the rear support rod (3) when the push rod assembly (1) rotates and moves closer to the rear support rod (3). A locking groove (61) is provided on the second connecting part (11). A rotating piece (62) is rotatably connected to the connecting seat (31). A locking hook (63) is provided at one end of the rotating piece (62) that can engage or disengage with the locking groove (61). A first reset spring (64) that can drive the rotating piece (62) to reset is provided between the other end of the rotating piece (62) and the connecting seat (31). An unlocking piece (65) that is exposed on the connecting seat (31) and can drive the rotating piece (62) to rotate and unlock when sliding downward is also connected to the rotating piece (62). A push part (44) is provided on the seat part (42) that can push the unlocking piece (65) to slide when it rotates downward relative to the mounting seat (41).

2. The stroller frame according to claim 1, characterized in that: The unlocking component (65) includes a body (651), the upper end of the body (651) is provided with a locking post (652) that engages with the locking hole (621) on the rotating piece (62), and the lower end of the body (651) is provided with a mating block (653) that is exposed to the connecting seat (31) and can engage with the pushing part (44).

3. The stroller frame according to claim 1, characterized in that: The front support rod (2) has a front crossbar (22) at its lower end, and the rear support rod (3) has a rear crossbar (33) at its lower end. The front crossbar (22) has a rotating rod (23) that can rotate relative to it. A flexible band (24) is provided between the rotating rod (23) and the rear crossbar (33) to pull up the rotating rod (23) when the stroller frame is in the unfolded state. A torsion spring (25) is also provided between the rotating rod (23) and the front crossbar (22) to push the rotating rod (23) to unfold when the stroller frame is folded. When the stroller frame is in the folded state, the rotating rod (23) rests against the ground and together with the wheels (10) keeps the folded stroller frame in an upright position.

4. The stroller frame according to claim 1, characterized in that: An auxiliary spring (7) is provided between the front support rod (2) and the rear support rod (3) to provide auxiliary force for their relative rotation and approach. When the stroller frame is unfolded, the auxiliary spring (7) is in a deformed and elongated state.

5. The stroller frame according to any one of claims 2 to 4, characterized in that: The seat assembly (4) also includes a backrest (43) and an armrest (45) rotatably connected to the rear end of the seat (42). A locking component (46) is provided between the mounting base (41), the seat (42), the backrest (43) and the armrest (45) to lock the seat assembly (4) in the unfolded state.

6. The stroller frame according to claim 5, characterized in that: The push-up part (44) includes a push-up block (441) that is slidably connected to the seat part (42) and can push the unlocking member (65) to slide when the seat part (42) is downward relative to the mounting base (41). An elastic reset element (442) that can push the push-up block (441) to reset is provided between the push-up block (441) and the seat part (42). The push-up block (441) is provided with a first inclined surface (443). The mating block (653) is provided with a push-up surface (654) that can push the first inclined surface (443) to retract the push-up block (441) into the seat part (42) when the seat part (42) is rotated upward and unfolded.

7. The stroller frame according to claim 5, characterized in that: A locking assembly is provided between the mounting base (41) and the locking seat (32) to lock the two together. The locking assembly includes a locking position (71) on the locking seat (32). The mounting base (41) is provided with a locking block (72) that can slide laterally relative to it and lock into or disengage from the locking position (71). The mounting base (41) is also connected to an operating member (73) that can slide vertically relative to it and push the locking block (72) to slide laterally. A first elastic element (74) is provided between the locking block (72) and the mounting base (41) to push the locking block (72) back to its original position. A second elastic element (75) is provided between the operating member (73) and the mounting base (41) to push the operating member (73) back to its original position.

8. The stroller frame according to claim 7, characterized in that: The operating component (73) includes a button (731) exposed on the mounting base (41). A vertical rod (732) that can push the locking block (72) to move is connected to the button (731). An elastic hook (733) is provided on one side of the lower end of the vertical rod (732), and a locking hook (734) is provided on the other side of the lower end of the vertical rod (732). A boss (76) is provided on the locking base (32) and below the locking position (71). At the locking block (72) and the locking position (734), a boss (76) is provided. 1) When engaged, the elastic hook (733) and the latch (734) are squeezed by the mounting base (41) and the outer side of the boss (76) and are in an elastic deformation state. When the vertical rod (732) moves downward and causes the engaging block (72) to disengage from the engaging position (71), the elastic hook (733) elastically recovers and pushes the latch (734) to hook the lower surface of the boss (76) so that the disengaged state of the engaging block (72) and the engaging position (71) can be maintained.

9. The stroller frame according to claim 5, characterized in that: The seat (42) has a left connecting shell (461), the mounting base (41) has a right connecting shell (462), the locking assembly (46) includes a spline groove (463) provided on the left connecting shell (461) and the right connecting shell (462), a spline (464) is provided between the left connecting shell (461) and the right connecting shell (462) that can engage with the spline groove (463) on the left connecting shell (461) and the right connecting shell (462) at the same time, a third return spring (465) is also provided between the spline (464) and the right connecting shell (462), and a protruding opening ring (460) is provided on the backrest (43), the inner wall of the opening ring (460) is provided so that the spline (464) can be pushed out when the backrest (43) is rotated and folded. The spline groove (463) on the left connecting shell (461) has a push-up protrusion (466), the spline (464) is partially embedded in the open ring (460), and the spline (464) is provided with a spiral surface (467) that can be pushed by the push-up protrusion (466). The spline (464) is also provided with a protruding bump (468). The armrest part (45) is provided with a snap-fit ​​groove (469) that can engage or disengage with the bump (468). Furthermore, the sliding distance of the spline (464) is set to ensure that when the push-up protrusion (466) pushes the spline (464) to slide to a position that allows the bump (468) to disengage from the snap-fit ​​groove (469), the spline (464) remains engaged with the spline groove (463) on the left connecting shell (461).

10. The stroller frame according to claim 1, characterized in that: A second reset spring (66) is provided between the connecting seat (31) and the unlocking member (65) to push the unlocking member (65) upward to reset.

Images