A child's pushchair frame and a child's pushchair

Abstract

This utility model discloses a stroller frame. A fixed base is provided at the upper end of the first leg, and a second leg is rotatably connected to the fixed base. A push rod assembly includes a push rod seat rotatably connected to the fixed base, and a push rod is fixedly connected to the push rod seat. The push rod assembly can stop in three positions: a forward push position, a reverse push position, and a folded position. A first locking mechanism is provided between the push rod seat and the fixed base to lock the push rod assembly in the forward push position or the reverse push position. A linkage assembly is provided between the first leg and the second leg. The linkage assembly includes a front connecting rod rotatably connected to the second leg at its front end and a rear connecting rod rotatably connected to the first leg at its rear end. The rear end of the front connecting rod is rotatably connected to the front end of the rear connecting rod. An upper connecting rod is rotatably connected to the rear connecting rod, and a linkage rod is provided between the upper end of the upper connecting rod and the fixed base. A second locking mechanism is provided inside the fixed base. This utility model also includes a stroller using the aforementioned stroller frame. This utility model has a simple structure and is easy to fold.

Description

[Technical Field]

[0001] This utility model relates to a stroller frame. This utility model also relates to a stroller. [Background Technology]

[0002] Strollers are common products used during an infant's and toddler's growth. A stroller generally consists of a stroller frame and a seat assembly attached to the frame. To facilitate interaction between adults and children while pushing the stroller, the push handle assembly of most strollers on the market can rotate and reverse direction. When the push handle assembly is in the forward-facing position, the adult and child in the seat assembly face each other; when the push handle assembly is rotated to the reverse-facing position, the adult and child in the seat assembly face the same direction. Furthermore, these strollers can be folded for easy carrying or storage. Currently, there are various stroller frame structures and folding principles. This utility model provides a stroller frame and stroller that differ from existing technologies. [Utility Model Content]

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a new type of children's stroller frame that is simple in structure and easy to fold.

[0004] This utility model also provides a new type of children's stroller with a simple structure and easy folding.

[0005] This utility model is achieved through the following technical solution:

[0006] A stroller frame capable of switching between an unfolded and folded state includes a first leg with a fixed base at its upper end. A second leg is rotatably connected to the fixed base about a first axis A. Wheels are provided at the lower ends of both the first and second legs. The stroller frame also includes a push rod assembly, comprising a push rod seat rotatably connected to the fixed base about a second axis B. A push rod is fixedly connected to the push rod seat. The push rod assembly has several positions, including a forward-pushing position for pushing the stroller frame forward and a reverse-pushing position for pushing the stroller frame backward after rotating a set angle relative to the fixed base. The push rod assembly also has a position where it rotates closer to the second leg. In the folding position of the legs, a first locking mechanism is provided between the push rod seat and the fixed seat to lock the push rod assembly in the forward push position or the reverse push position. A linkage assembly is provided between the first leg and the second leg to enable them to rotate relative to each other and move closer together. The linkage assembly includes a front connecting rod whose front end is rotatably connected to the second leg about a third axis C and a rear connecting rod whose rear end is rotatably connected to the first leg about a fourth axis D. The rear end of the front connecting rod is rotatably connected to the front end of the rear connecting rod about a fifth axis E. An upper connecting rod is rotatably connected to the rear connecting rod about a sixth axis F. A linkage rod is provided between the upper end of the upper connecting rod and the fixed seat to rotatably connect the two. A second locking mechanism is provided inside the fixed seat to lock the first leg and the second leg.

[0007] One end of the linkage rod is rotatably connected to the upper connecting rod around the seventh axis G, and the other end is rotatably connected to the fixed base around the first axis A.

[0008] When the stroller frame is in the unfolded state, the upper part of the linkage rod and the upper connecting rod are stored in the fixed seat. When the stroller frame is folded, the upper part of the upper connecting rod and the linkage rod move out of the fixed seat.

[0009] The push rod seat is provided with a push part that can drive the second locking mechanism to unlock when the push rod assembly moves from the forward push position to the folding position.

[0010] The linkage rod is provided with a protrusion integrally formed therewith. The second locking mechanism includes a slot on the protrusion. The fixed seat is provided with a locking rod that can slide therein. The locking rod is provided with a locking pin that can engage or disengage with the slot. The protrusion is provided with an arc-shaped groove that communicates with the slot and allows the locking pin to move relative to it. A first return spring is provided between the fixed seat and the locking rod that can push the locking rod to reset.

[0011] The locking rod is provided with a guide shaft, the fixed seat is provided with a guide hole that cooperates with the guide shaft, and the pushing part causes the locking rod to slide by pushing the guide shaft. The push rod seat is provided with an insertion groove for the guide shaft to be inserted. The pushing part is the outer peripheral surface of the push rod seat, and the bottom a of the insertion groove and the pushing part are provided with an inclined surface connecting the two.

[0012] The first locking mechanism includes a first locking groove and a second locking groove on a fixed base. A sliding rod is slidably provided inside the push rod base. The sliding rod has a locking block that protrudes outward and can engage or disengage with the first locking groove and the second locking groove. When the locking block engages with the first locking groove, the push rod assembly is locked in the forward pushing position. When the locking block engages with the second locking groove, the push rod assembly is locked in the reverse pushing position. A first clearance groove is provided between the first locking groove and the second locking groove, which allows the locking block to move within when the push rod assembly rotates between the forward pushing position and the reverse pushing position. The fixed base also has a second clearance groove, which allows the locking block to move within when the push rod assembly rotates between the forward pushing position and the folding position. The push rod has an unlocking component that can pull the sliding rod to slide. A second return spring is also provided between the push rod base and the sliding rod, which can push the sliding rod to reset.

[0013] The unlocking component includes a sliding sleeve that is fitted onto the push rod and can slide along the push rod, and a pull rope that can pull the sliding rod to slide is provided between the sliding sleeve and the sliding rod.

[0014] The fixed base is also provided with a first locking groove opposite to the first locking groove and a second locking groove opposite to the second locking groove. The sliding rod is provided with a protruding locking block on one side. When the locking block engages or disengages with the first locking groove, the locking block engages or disengages with the first locking groove accordingly. When the locking block engages or disengages with the second locking groove, the locking block engages or disengages with the second locking groove accordingly. The fixed base is provided with a third clearance groove that allows the locking block to move within when the push rod assembly rotates between the forward push position, the reverse push position, and the folding position.

[0015] A stroller includes a stroller frame as described above, wherein a connecting seat is provided on the fixed seat, and a seat assembly that can be unfolded or folded is detachably connected to the connecting seat.

[0016] Compared with existing technologies, this utility model has the following advantages: When folding the stroller frame of this utility model, the first locking mechanism is unlocked first, allowing the push rod assembly to move to the folding position. During the process of the push rod assembly rotating towards the first leg, the push rod seat drives the second locking mechanism to unlock. Then, the stroller frame is lifted, and under the action of gravity, the first and second legs rotate relative to each other and move closer. During this specific moving-close process, the linkage rod rotates relative to the fixed seat and the upper connecting rod, the upper connecting rod rotates relative to the rear connecting rod, the rear connecting rod rotates relative to the front connecting rod and the first leg, and the front connecting rod rotates relative to the second leg. The connection position of the front and rear connecting rods moves downwards, ultimately achieving the rearward movement of the first and second legs, and the push rod assembly also moves towards the first leg to reach its folding position. The entire stroller frame has a simple structure, convenient folding operation, and flexible storage. The stroller itself has a foldable seat assembly connected to the aforementioned stroller frame. When folding the stroller, the seat assembly is folded first, and then the stroller frame is folded. When unfolding, first rotate the unfolding push rod assembly to the forward push position and lock it, then move the first leg and the second leg to unfold relative to each other until the second locking mechanism locks again. [Attached Image Description]

[0017] Figure 1 This is a three-dimensional view of the children's stroller frame of this utility model;

[0018] Figure 2 This is a side view of the stroller frame of this utility model;

[0019] Figure 3 This is an exploded view of the children's stroller frame of this utility model;

[0020] Figure 4 yes Figure 3 A magnified view at point H in the middle;

[0021] Figure 5 This is one of the exploded views of the components of the children's stroller frame of this utility model;

[0022] Figure 6 This is the second exploded view of the components of the children's stroller frame of this utility model;

[0023] Figure 7 This is the third exploded view of the components of the children's stroller frame of this utility model;

[0024] Figure 8 This is a partial sectional view of the children's stroller frame of this utility model;

[0025] Figure 9 This is a side view of the children's stroller frame during the folding process of this utility model;

[0026] Figure 10 This is a three-dimensional view of the folding process of the children's stroller frame of this utility model;

[0027] Figure 11 yes Figure 10 A magnified view at point I in the middle;

[0028] Figure 12 This is a three-dimensional view of the folded stroller frame of this utility model;

[0029] Figure 13 This is a side view of the children's stroller of this utility model when the push rod assembly is in the forward pushing position;

[0030] Figure 14 This is a side view of the children's stroller of this utility model when the push rod assembly is in the reverse push position;

[0031] Figure 15 This is a side view of the folding process of the children's stroller of this utility model;

[0032] Figure 16 This is a side view of the folded stroller of this utility model.

Detailed Implementation Methods

[0033] The present invention will be further described below with reference to the accompanying drawings:

[0034] like Figures 1 to 12 As shown, this embodiment provides a stroller frame that can switch between an unfolded state and a folded state. It mainly includes a first leg 1, a second leg 2, and a push rod assembly 4. The upper end of the first leg 1 is provided with a fixed seat 11. The second leg 2 is rotatably connected to the fixed seat 11 around a first axis A. Both the first leg 1 and the second leg 2 are provided with wheels 3 at their lower ends. The push rod assembly 4 can be positioned in several ways: a forward-pushing position (allowing the stroller frame to be pushed forward), a reverse-pushing position (allowing the stroller frame to be pushed backward after rotating a set angle relative to the fixed seat 11), and a folded position (rotating and closing onto the second leg 2). The push rod assembly 4 includes a push rod seat 41 and a push rod 42. The push rod seat 41 is rotatably connected to the fixed seat 11 around a second axis B, allowing the push rod assembly 4 to switch between the forward-pushing position, the reverse-pushing position, and the folded position (closed to the second leg 2). A first locking mechanism 5 is provided between the push rod seat 41 and the fixed seat 11 to lock the push rod assembly 4 in the forward-pushing position or the reverse-pushing position. When the push rod assembly 4 is in the forward push position, the adult can interact face-to-face with the child inside the stroller while pushing it. When the push rod assembly 4 is rotated to the reverse push position, the adult and the child inside the stroller push in the same direction.

[0035] like Figures 1 to 12As shown, a linkage assembly 6 is provided between the first leg 1 and the second leg 2. The linkage assembly 6 connects the first leg 1 and the second leg 2 and is used to link their relative rotation and bring them closer together to achieve folding. The linkage assembly 6 includes a front link 61 and a rear link 62. The front end of the front link 61 is rotatably connected to the second leg 2 about a third axis C, and the rear end of the rear link 62 is rotatably connected to the first leg 1 about a fourth axis D. The rear end of the front link 61 is rotatably connected to the front end of the rear link 62 about a fifth axis E. An upper link 63 is rotatably connected to the rear link 62 about a sixth axis F. The upper end of the upper link 63 is movably connected to the fixed base 11 through a linkage rod 64. Specifically, one end of the linkage rod 64 is rotatably connected to the upper link 63 about a seventh axis G, and the other end is rotatably connected to the fixed base 11 about the first axis A. When the stroller frame needs to be folded, first unlock the first locking mechanism 5, then rotate the push rod assembly 4 to the folding position and unlock the second locking mechanism 7. Then lift the stroller frame; under gravity, the first leg 1 and the second leg 2 rotate relative to each other and move closer. During this movement, the linkage rod 64 rotates relative to the fixed seat 11 and the upper connecting rod 63; the upper connecting rod 63 rotates relative to the rear connecting rod 62; the rear connecting rod 62 rotates relative to the front connecting rod 61 and the first leg 1; and the front connecting rod 61 rotates relative to the second leg 2. The connection point between the front connecting rod 61 and the rear connecting rod 62 moves downwards, ultimately bringing the first leg 1 and the second leg 2 together. The entire stroller frame has a simple structure, is easy to fold, and is flexible in its operation. When unfolding, first rotate the unfolding push rod assembly 4 to the forward push position and lock it. Then, move the first leg 1 and the second leg 2 relative to each other until the second locking mechanism 7 locks again. In this embodiment, the push rod seat 41 is provided with a push part 45 that can drive the second locking mechanism 7 to unlock when the push rod assembly 4 moves from the forward push position to the folding position, so that the push rod assembly 4 can be linked to the second locking mechanism 7 to unlock when it rotates and folds, making the folding operation of the stroller frame more convenient and quick.

[0036] like Figure 6 and Figure 10 As shown, in order to make the stroller frame structure more compact and the folding and closing more flexible, the linkage 64 and the upper linkage 63 are configured such that when the stroller frame is in the unfolded state, the upper parts of the linkage 64 and the upper linkage 63 are stored in the fixed seat 11; during the folding process, the upper parts of the upper linkage 63 and the linkage 64 move out of the fixed seat 11.

[0037] like Figure 5 , Figure 7 and Figure 8As shown, the second locking mechanism 7 is used to lock the first leg 1 and the second leg 2 in their deployed state. A protrusion 65 is integrally formed on the linkage rod 64. The second locking mechanism 7 includes a slot 71 on the protrusion 65, and a slidable locking rod 72 within the fixed base 11. The locking rod 72 has a locking pin 73, which can engage or disengage from the slot 71. The protrusion 65 also has an arc-shaped groove 74 communicating with the slot 71, allowing the locking pin 73 to move relative to the slot after being pushed out of it. A first return spring 75 is provided between the fixed base 11 and the locking rod 72. A guide shaft 76 is provided on the locking rod 72, and a guide hole 12 that mates with the guide shaft 76 is provided on the fixed base 11. When the push rod assembly 4 moves from the forward push position to the folded position, the push part 45 drives the locking rod 72 to slide downward through the push guide shaft 76. The downward sliding of the locking rod 72 causes the locking pin 73 to disengage from the locking groove 71, realizing the linkage unlocking of the second locking mechanism 7. In addition, the arc-shaped groove 74 on the protrusion 65 avoids interference between the linkage rod 64 and the locking pin 73 when it rotates relative to the fixed seat 11. The push rod seat 41 is also provided with an insertion groove 43 for the guide shaft 76 to be inserted. The bottom 43a of the insertion groove 43 is connected to the push part 45 through an inclined surface 44. The push part 45 is the outer peripheral surface of the push rod seat 41. When the push rod assembly 4 rotates and folds, the inclined surface 44 on the push rod seat 41 first abuts against the guide shaft 76, and then gradually pushes the guide shaft 76 from the outer peripheral surface of the push rod seat 41 to move the locking rod 72. When the stroller frame is unfolded, the first leg 1 and the second leg 2 rotate relative to each other and unfold. The upper part of the linkage rod 64 and the upper connecting rod 63 rotate into the fixed seat 11. The first return spring 75 pushes the locking rod 72 to slide back to its original position, so that the locking pin 73 can be locked into the slot 71 again, thereby achieving locking.

[0038] like Figures 4 to 8As shown, the first locking mechanism 5 includes a first locking groove 51 and a second locking groove 52 disposed on the fixed base 11. A sliding rod 53 is slidably disposed within the push rod seat 41, and a locking block 54 protrudes from one side of the sliding rod 53. The locking block 54 can engage with either the first locking groove 51 or the second locking groove 52. When the locking block 54 engages with the first locking groove 51, the push rod assembly 4 is locked in the forward pushing position; when the locking block 54 engages with the second locking groove 52, the push rod assembly 4 is locked in the reverse pushing position. A first clearance groove 55 is provided between the first locking groove 51 and the second locking groove 52. When the push rod assembly 4 rotates between the forward pushing position and the reverse pushing position, the first clearance groove 55 allows the locking block 54 to move within it. The fixed base 11 is also provided with a second clearance groove 56. When the push rod assembly 4 rotates between the forward pushing position and the folding position, the second clearance groove 56 allows the locking block 54 to move within it. The push rod 42 is equipped with an unlocking component 57 for pulling the sliding rod 53 to slide and unlock. The unlocking component 57 includes a sliding sleeve 571 sleeved on the push rod 42 and a pull rope 572 connecting the sliding sleeve 571 and the sliding rod 53. A second return spring 58 is provided between the push rod seat 41 and the sliding rod 53 for pushing the sliding rod 53 to return to its original position. The fixed seat 11 and the push rod seat 41 are rotatably connected by a connecting shaft 8. The sliding rod 53 is provided with a clearance hole 59 for clearing the connecting shaft 8 during sliding. When it is necessary to adjust the position of the push rod assembly 4, the sliding sleeve 571 is slid, and the sliding rod 53 is pulled by the pull rope 572, thereby disengaging the locking block 54 from the first locking groove 51 or the second locking groove 52. Then, the push rod assembly 4 is rotated. When it is rotated to the desired position, the sliding sleeve 571 is released, and the second return spring 58 pushes the sliding rod 53 to return to its original position, so that the locking block 54 engages with the second locking groove 52 or the first locking groove 51.

[0039] like Figures 4 to 8 As shown, the fixed base 11 is also provided with a first locking groove 501 and a second locking groove 502, and a locking block 503 protrudes from one side of the sliding rod 53. When the locking block 54 engages or disengages with the first locking groove 51, the locking block 503 engages or disengages with the first locking groove 501 accordingly; when the locking block 54 engages or disengages with the second locking groove 52, the locking block 503 engages or disengages with the second locking groove 502 accordingly, thereby making the position of the push rod assembly 4 more securely locked. The fixed base 11 is provided with a third clearance groove 504, which allows the locking block 503 to move within when the push rod assembly 4 rotates between the forward push position, the reverse push position, and the folding position.

[0040] like Figures 1 to 16As shown, this embodiment also provides a stroller, including the stroller frame described above. A connecting seat 13 is provided on the fixed base 11, and a seat assembly 9 that can be unfolded or folded is detachably connected to the connecting seat 13. When the stroller needs to be folded, the seat assembly 9 is folded first, and then the stroller frame is folded. The seat assembly 9 can adopt a seat assembly structure from the prior art, which will not be described in detail here. When the stroller needs to be unfolded, the unfolding push rod assembly 4 is rotated and locked first, then the first leg 1 and the second leg 2 are opened and locked, and finally the seat assembly 9 is unfolded.

[0041] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A stroller frame for children, capable of switching between an unfolded state and a folded state, characterized in that: The stroller frame includes a first leg (1), with a fixed seat (11) at its upper end. A second leg (2) is rotatably connected to the fixed seat (11) around a first axis (A). Both the second leg (2) and the first leg (1) have wheels (3) at their lower ends. The stroller frame also includes a push rod assembly (4), which includes a push rod seat (41) rotatably connected to the fixed seat (11) around a second axis (B). A push rod (42) is fixedly connected to the push rod seat (41). The push rod assembly (4) can be positioned in two ways: a forward push position for pushing the stroller frame forward and a reverse push position for pushing the stroller frame backward after rotating a set angle relative to the fixed seat (11). The push rod assembly (4) can also be positioned in a folded position where it rotates closer to the second leg (2). The push rod seat (41) and the fixed seat (11) are connected in two ways. A first locking mechanism (5) is provided to lock the push rod assembly (4) in the forward push position or the reverse push position. A linkage assembly (6) is provided between the first leg (1) and the second leg (2) to enable them to rotate relative to each other and move closer together. The linkage assembly (6) includes a front connecting rod (61) whose front end is rotatably connected to the second leg (2) around the third axis (C) and a rear connecting rod (62) whose rear end is rotatably connected to the first leg (1) around the fourth axis (D). The rear end of the front connecting rod (61) is rotatably connected to the front end of the rear connecting rod (62) around the fifth axis (E). An upper connecting rod (63) is rotatably connected to the rear connecting rod (62) around the sixth axis (F). A linkage rod (64) is provided between the upper end of the upper connecting rod (63) and the fixed seat (11) to rotatably connect the two. A second locking mechanism (7) is provided in the fixed seat (11) to lock the first leg (1) and the second leg (2).

2. The stroller frame according to claim 1, characterized in that: One end of the linkage rod (64) is rotatably connected to the upper connecting rod (63) around the seventh axis (G), and the other end is rotatably connected to the fixed base (11) around the first axis (A).

3. The stroller frame according to claim 2, characterized in that: When the stroller frame is in the unfolded state, the upper parts of the linkage rod (64) and the upper connecting rod (63) are stored in the fixed seat (11). When the stroller frame is folded, the upper parts of the upper connecting rod (63) and the linkage rod (64) move outside the fixed seat (11).

4. The stroller frame according to claim 1, characterized in that: The push rod seat (41) is provided with a push part (45) that can drive the second locking mechanism (7) to unlock when the push rod assembly (4) moves from the forward push position to the folding position.

5. The stroller frame according to claim 4, characterized in that: The linkage rod (64) is provided with a protrusion (65) integrally formed therewith. The second locking mechanism (7) includes a slot (71) provided on the protrusion (65). The fixed base (11) is provided with a locking rod (72) that can slide therein. The locking rod (72) is provided with a locking pin (73) that can engage or disengage with the slot (71). The protrusion (65) is provided with an arc-shaped groove (74) that communicates with the slot (71) and allows the locking pin (73) to move relative to it. A first return spring (75) that can push the locking rod (72) to reset is provided between the fixed base (11) and the locking rod (72).

6. The stroller frame according to claim 5, characterized in that: The locking rod (72) is provided with a guide shaft (76), the fixed seat (11) is provided with a guide hole (12) that cooperates with the guide shaft (76), and the pushing part (45) causes the locking rod (72) to slide by pushing the guide shaft (76). The push rod seat (41) is provided with an insertion groove (43) for the guide shaft (76) to be inserted. The pushing part (45) is the outer peripheral surface of the push rod seat (41). The bottom (43a) of the insertion groove (43) and the pushing part (45) are provided with an inclined surface (44) connecting the two.

7. The stroller frame according to claim 1, characterized in that: The first locking mechanism (5) includes a first locking groove (51) and a second locking groove (52) provided on the fixed base (11). A sliding rod (53) is slidably provided in the push rod seat (41). The sliding rod (53) is provided with a locking block (54) that protrudes outward and can engage or disengage with the first locking groove (51) and the second locking groove (52). When the locking block (54) engages with the first locking groove (51), the push rod assembly (4) is locked in the forward pushing position. When the locking block (54) engages with the second locking groove (52), the push rod assembly (4) is locked in the reverse pushing position. A first clearance groove (55) is provided between the locking groove (51) and the second locking groove (52) so that the locking block (54) can move within it when the push rod assembly (4) rotates between the forward push position and the reverse push position. The fixed base (11) is also provided with a second clearance groove (56) so that the locking block (54) can move within it when the push rod assembly (4) rotates between the forward push position and the folding position. The push rod (42) is provided with an unlocking member (57) that can pull the sliding rod (53) to slide. A second return spring (58) is also provided between the push rod base (41) and the sliding rod (53) so as to push the sliding rod (53) to reset.

8. The stroller frame according to claim 7, characterized in that: The unlocking component (57) includes a sliding sleeve (571) that is sleeved on the push rod (42) and can slide along the push rod (42). A pull rope (572) that can pull the sliding rod (53) to slide is provided between the sliding sleeve (571) and the sliding rod (53).

9. The stroller frame according to claim 7, characterized in that: The fixed base (11) is also provided with a first locking groove (501) opposite to the first locking groove (51) and a second locking groove (502) opposite to the second locking groove (52). The sliding rod (53) is provided with a protruding locking block (503) on one side. When the locking block (54) engages or disengages from the first locking groove (51), the locking block (503) engages or disengages from the first locking groove (501) accordingly. When the locking block (54) engages or disengages from the second locking groove (52), the locking block (503) engages or disengages from the second locking groove (502) accordingly. The fixed base (11) is provided with a third clearance groove (504) that allows the locking block (503) to move within when the push rod assembly (4) rotates between the forward push position, the reverse push position and the folding position.

10. A child stroller, characterized in that: The stroller frame includes any one of claims 1 to 9, wherein the fixed seat (11) is provided with a connecting seat (13), and the connecting seat (13) is detachably connected to a seat assembly (9) that can be unfolded or folded.

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