Baby stroller

Abstract

A front leg joint seat is arranged at the upper end of a front leg rod, a push rod joint seat rotatably connected with the front leg joint seat around a first axis A is arranged at the lower end of a lower push rod, and a rear leg assembly comprises a first supporting rod and a second supporting rod. The upper end of the first supporting rod is rotatably connected to the front leg assembly around a second axis B and close to the upper end of the front leg assembly, the upper end of the second supporting rod is rotatably connected to the push rod assembly around a third axis C and close to the lower end of the push rod assembly, the lower ends of the first supporting rod and the second supporting rod are rotatably connected with a rear wheel frame, and the rear wheel frame is connected with a rear wheel. The stroller further comprises a seat supporting piece, the rear end of the seat supporting piece is rotatably connected to the front leg assembly around a fourth axis D, and a transmission assembly capable of pulling the seat supporting piece to be close to the front leg assembly when the push rod assembly rotates to be close to the rear leg assembly is arranged among the front end of the seat supporting piece, the front leg assembly and the push rod assembly. The folding chair is simple in structure and convenient to fold.

Description

[Technical field]

[0001] The utility model relates to a baby stroller. [Background technology]

[0002] A child stroller is a common product for infants and young children to grow up. Current child strollers can generally be folded or unfolded. When unfolded, they are used to push children, and when folded, they are easy to store or carry. There are various folding mechanisms of child strollers on the market. The utility model provides a folding mechanism that is different from the existing design of child strollers. [Contents of the utility model]

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a child stroller with a simple structure and convenient folding operation.

[0004] The utility model is realized by the following technical solutions:

[0005] A stroller for children, which can be moved from an unfolded position to a folded position after a locking device is unlocked, and is characterized in that: it comprises a front leg assembly 1, a rear leg assembly 2 and a push rod assembly 3, the front leg assembly 1 comprises a front leg rod 11, the lower end of the front leg rod 11 is connected to a front wheel 12, the upper end of the front leg rod 11 is provided with a front leg joint seat 13, the push rod assembly 3 comprises a lower push rod 31 and an upper push rod 32 which can be unfolded or folded relative to the lower push rod 31, the lower end of the lower push rod 31 is provided with a push rod joint seat 33 which is rotatably connected to the front leg joint seat 13 around a first axis A, the rear leg assembly 2 comprises a first support rod 21 and a second support rod 22, the upper end of the first support rod 21 is rotatable around a second axis B The stroller is rotatably connected to the front leg assembly 1 and is close to the upper end of the front leg assembly 1. The upper end of the second support rod 22 is rotatably connected to the push rod assembly 3 around the third axis C and is close to the lower end of the push rod assembly 3. The lower ends of the first support rod 21 and the second support rod 22 are rotatably connected to the rear wheel frame 23, and the rear wheel frame 23 is connected to the rear wheel 24. The child stroller also includes a seat support 4, and the rear end of the seat support 4 is rotatably connected to the front leg assembly 1 around the fourth axis D. A transmission assembly 5 is provided between the front end of the seat support 4, the front leg assembly 1 and the push rod assembly 3, which can pull the seat support 4 closer to the front leg assembly 1 when the push rod assembly 3 rotates closer to the rear leg assembly 2.

[0006] The front leg assembly 1 also includes a connecting seat 14 connected to the front leg rod 11, the upper end of the first support rod 21 is rotatably connected to the connecting seat 14 around the second axis B, the upper end of the second support rod 22 is rotatably connected to the push rod joint seat 33 around the third axis C, and the rear end of the seat support member 4 is rotatably connected to the eccentric position of the front leg joint seat 13 around the fourth axis D.

[0007] The transmission assembly 5 includes a first transmission rod 51 rotatably connected to the front end of the seat support 4 around a fifth axis E and a second transmission rod 52 rotatably connected to the front leg rod 11 around a sixth axis F, and the second transmission rod 52 is hinged to the first transmission rod 51 around a seventh axis G, and a third transmission rod 53 hinged to the first transmission rod 51 or the second transmission rod 52 and the eccentric position of the push rod joint seat 33 is also provided between the two.

[0008] The first transmission rod 51 , the second transmission rod 52 and the third transmission rod 53 are coaxially hinged around the seventh axis G, and the third transmission rod 53 is rotatably connected to the push rod joint seat 33 around the ninth axis H.

[0009] The seat support 4 is provided with a foldable seat assembly 6, and the seat assembly 6 includes a seat plate 61 connected to the seat support 4, a backrest 62 which can be rotated, folded or unfolded relative to the seat plate 61 is provided at the rear side of the seat plate 61, an armrest 63 which can be rotated, unfolded or folded relative to the seat plate 61 is connected to the backrest 62, and a leg support frame 64 which can be rotated relative to the seat plate 61 is provided at the front end of the seat plate 61.

[0010] The lower end of the front leg rod 11 is fixedly connected to a transverse front wheel frame 15 , and the front wheel 12 is connected to the front wheel frame 15 .

[0011] There are two front leg rods 11 that form an eight-shape with each other, there are two front leg joint seats 13, there are one upper push rod 32 and one lower push rod 31, and the push rod joint seat 33 is arranged between the two front leg joint seats 13. There are two first support rods 21 that form an eight-shape with each other, and there are two second support rods 22 that form a V-shape with each other.

[0012] The upper push rod 32 is slidably connected to the lower push rod 31 , and a locking component 34 is provided between the upper push rod 32 and the lower push rod 31 to lock the relative positions of the two.

[0013] The locking device includes a first slot 71 arranged on the front leg joint seat 13 along the circumferential direction and a second slot 72 arranged on the push rod joint seat 33 along the circumferential direction. A gear 73 is provided in the space enclosed by the front leg joint seat 13 and the push rod joint seat 33, which can move laterally therein and can simultaneously engage with the first slot 71 and the second slot 72. A movable block 74 is provided between the gear 73 and the push rod joint seat 33, which can rotate relative to the push rod joint seat 33 and can push the gear 73 to disengage from the second slot 72 when rotating. A driving member 75 is provided in the push rod joint seat 33, which can push the movable block 74 to rotate. A reset spring 76 is provided between the front leg joint seat 13 and the gear 73, which can push the gear 73 to reset.

[0014] The driving member 75 includes a sliding plate 751 that can slide up and down in the push rod joint seat 33, the movable block 74 is provided with a step 752 that can contact the lower end of the sliding plate 751, the lower end of the upper push rod 32 is provided with a pushing portion that can push the sliding plate 751 to slide when it is retracted in the downward push rod 31, the push rod joint seat 33 is provided with a plurality of inclined bosses 81 along the circumferential direction, and the movable block 74 is provided with an inclined groove 82 that matches the inclined boss 81 and can be pushed by the inclined boss 81 when the movable block 74 rotates.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1. When the child stroller of the utility model is folded, the push rod assembly rotates relative to the front leg assembly, the push rod assembly approaches the second support rod, the front leg assembly rotates and approaches the first support rod, and the first support rod and the second support rod also rotate relative to the rear wheel frame, and the second support rod and the first support rod also approach each other. In addition, in the process of the push rod assembly approaching the rear leg assembly, the push rod assembly pulls the seat support member to rotate and approach the front leg assembly through the transmission assembly, and the seat support member is folded. At this point, the entire child stroller can be completely folded. To fold, it only needs to rotate the push rod assembly backward, and the seat support member can be linked to fold. The folding operation is very convenient, and the entire child stroller has a simple structure.

[0017] 2. When the push rod assembly of the utility model rotates backward, the push rod joint seat rotates relative to the front leg joint seat, and the push rod joint seat pulls the third transmission rod, and the third transmission rod pulls the connection position of the first transmission rod and the second transmission rod, thereby pulling the front end of the seat support member through the first transmission rod, so that the seat support member rotates closer to the front leg rod. Therefore, when the push rod assembly rotates and folds, the seat support member is linked to fold, ensuring that the folding operation of the child stroller is convenient.

[0018] 3. The utility model has a simple structure and is easy to fold and operate, and is suitable for popularization and application.

Brief Description of the Drawings

[0019] Figure 1 It is one of the three-dimensional diagrams of the utility model;

[0020] Figure 2 This is the second stereogram of the utility model;

[0021] Figure 3 It is a side view of the utility model in the unfolded state;

[0022] Figure 4 It is one of the exploded views of the components of the utility model;

[0023] Figure 5 This is the second exploded view of the components of the utility model;

[0024] Figure 6 It is a three-dimensional diagram of the push rod joint seat of the utility model;

[0025] Figure 7 It is a side view of the utility model in a folded state;

[0026] Figure 8 yes Figure 7 Magnified view at point I in the middle. [Specific implementation method]

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] like Figures 1 to 3 , Figure 7 and Figure 8 As shown, a child stroller can be moved from an unfolded position to a folded position after a locking device is unlocked, comprising a front leg assembly 1, a rear leg assembly 2 and a push rod assembly 3, wherein the front leg assembly 1 comprises a front leg rod 11, the lower end of the front leg rod 11 is fixedly connected to a transverse front wheel frame 15, the front wheel frame 15 is connected to a front wheel 12, the upper end of the front leg rod 11 is provided with a front leg joint seat 13, the push rod assembly 3 comprises a lower push rod 31 and an upper push rod 32 which can be unfolded or folded relative to the lower push rod 31, the lower end of the lower push rod 31 is provided with a push rod joint seat 33 which is rotatably connected to the front leg joint seat 13 around a first axis A, the rear leg assembly 2 comprises a first support rod 21 and a second support rod 22, the first support rod 21 The upper end is rotatably connected to the front leg assembly 1 around the second axis B and is close to the upper end of the front leg assembly 1. The upper end of the second support rod 22 is rotatably connected to the push rod assembly 3 around the third axis C and is close to the lower end of the push rod assembly 3. The lower ends of the first support rod 21 and the second support rod 22 are rotatably connected to the rear wheel frame 23, and the rear wheel frame 23 is connected to the rear wheel 24. The child stroller also includes a seat support 4, and the rear end of the seat support 4 is rotatably connected to the front leg assembly 1 around the fourth axis D. A transmission assembly 5 is provided between the front end of the seat support 4, the front leg assembly 1 and the push rod assembly 3, which can pull the seat support 4 closer to the front leg assembly 1 when the push rod assembly 3 rotates closer to the rear leg assembly 2. When the child stroller is folded, the push rod assembly 3 rotates relative to the front leg assembly 1, the push rod assembly 3 moves closer to the second support rod 22, the front leg assembly 1 rotates and moves closer to the first support rod 21, and the first support rod 21 and the second support rod 22 also rotate relative to the rear wheel frame 23, the second support rod 22 and the first support rod 21 also move closer to each other, and in the process of the push rod assembly 3 moving closer to the rear leg assembly 2, the push rod assembly 3 pulls the seat support 4 to rotate and move closer to the front leg assembly 1 through the transmission assembly 5, and the seat support 4 is also folded. At this point, the entire child stroller can be completely folded. To fold it, you only need to rotate the push rod assembly 3 backward, and realize the linked folding of the seat support 4. The folding operation is very convenient, and the entire child stroller has a simple structure.

[0029] like Figures 1 to 3 As shown, in this embodiment, the seat support 4 is provided with a foldable seat assembly 6, and the seat assembly 6 includes a seat board 61 connected to the seat support 4, and the back side of the seat board 61 is provided with a backrest 62 that can be rotated, folded or unfolded relative to the seat board 61, and the backrest 62 is connected to an armrest 63 that can be rotated, unfolded or folded relative to the seat board 61, and the front end of the seat board 61 is provided with a leg support frame 64 that can be rotated relative to the seat board 61. When the child stroller is folded, the seat assembly 6 is folded first, and the leg support frame 64 is rotated to a position flush with the seat board 61, and then the backrest 62 and the armrest 63 are rotated to be close to the seat board 61, and finally the push rod assembly 3 is rotated backward, so as to realize the folding of the child stroller. The seat assembly 6 can make children ride more comfortably and safely, and the leg support frame 64 is used to support the legs, and when the leg support frame 64 is rotated to a position flush with the seat board 61, the front and rear length of the seat can be extended, and the child can lie down and sleep. Of course, the seat assembly 6 may not be provided, for example, the shape of the seat support 4 may be changed, and the child may also sit directly on the seat support 4 .

[0030] like Figures 1 to 3 As shown, the front leg assembly 1 also includes a connecting seat 14 connected to the front leg rod 11, the upper end of the first support rod 21 is rotatably connected to the connecting seat 14 around the second axis B, the upper end of the second support rod 22 is rotatably connected to the push rod joint seat 33 around the third axis C, and the rear end of the seat support member 4 is rotatably connected to the eccentric position of the front leg joint seat 13 around the fourth axis D.

[0031] like Figures 1 to 3 , Figures 7 and 8As shown, the transmission assembly 5 includes a first transmission rod 51 rotatably connected to the front end of the seat support 4 around a fifth axis E and a second transmission rod 52 rotatably connected to the front leg rod 11 around a sixth axis F, and the second transmission rod 52 is hinged with the first transmission rod 51 around a seventh axis G, and a third transmission rod 53 hinged with the first transmission rod 51 or the second transmission rod 52 and the push rod joint seat 33 is also provided between the eccentric position of the first transmission rod 51 or the second transmission rod 52 and the push rod joint seat 33. In this embodiment, in order to fold flexibly and smoothly, the first transmission rod 51, the second transmission rod 52 and the third transmission rod 53 are coaxially hinged around the seventh axis G, and the third transmission rod 53 is rotatably connected with the push rod joint seat 33 around the ninth axis H. When the push rod assembly 3 rotates relative to the front leg assembly 1, the push rod joint seat 33 rotates relative to the front leg joint seat 13 around the first axis A, the lower push rod 31 rotates relative to the second support rod 22 around the third axis C, and the front leg rod 11 rotates relative to the first support rod 21 around the second axis B. At the same time, the lower ends of the first support rod 21 and the second support rod 22 rotate relative to the rear wheel frame 23 at the same time. During this process, the lower push rod 31, the front leg rod 11, the first support rod 21 and the second support rod 22 move closer to each other, and during the rotation of the push rod joint seat 33, the push rod joint seat 33 pulls the third transmission rod 5 3 moves and rotates relatively with the third transmission rod 53, and the third transmission rod 53 pulls the connecting position of the first transmission rod 51 and the second transmission rod 52 backward, so that the first transmission rod 51 rotates relative to the seat support 4, and the second transmission rod 52 rotates relative to the front leg rod 11. During the rotation of the first transmission rod 51 relative to the seat support 4, the rear end of the seat support 4 can be pulled to rotate relative to the front leg assembly 1 and the front end of the seat support 4 is moved closer to the front leg rod 11, so that the child stroller is folded. The entire folding operation only needs to rotate the leg rod assembly 3 backward, which is very convenient and quick to operate.

[0032] like Figure 1 and Figure 2 As shown, the front leg rods 11 have two and mutually form an eight-shaped shape, the front leg joint seats 13 have two, the upper push rod 32 and the lower push rod 31 have one each, the push rod joint seat 33 is arranged between the two front leg joint seats 13, the first support rods 21 have two and mutually form an eight-shaped shape, and the second support rods 22 have two and mutually form a V-shape. Therefore, the lower part of the entire child stroller is supported by six support rods, namely, two second support rods 22, two first support rods 21 and two front leg rods 11. Compared with the lower support structure of most of the current market with only two rear legs and one front leg, the child stroller of this embodiment has a stronger bearing capacity, is more stable, is not easy to tip over, and has better safety.

[0033] like Figures 1 to 3As shown, the upper push rod 32 is slidably connected to the lower push rod 31, and a locking component 34 is provided between the upper push rod 32 and the lower push rod 31 to lock the relative position of the two. In this embodiment, the upper push rod 32 is for adults to grasp and push the child stroller. When the child stroller is folded, the upper push rod 32 is first retracted into the lower push rod 31, and the locking component 34 can adopt a traditional locking structure of a tongue and a hole, which will not be repeated here. Of course, the upper push rod 32 can also be rotatably connected to the upper end of the lower push rod 31. When the child stroller needs to be folded, the upper push rod 32 is first rotated to be close to the lower push rod 31.

[0034] like Figures 4 to 6 As shown, the locking device includes a first slot 71 arranged on the front leg joint seat 13 along the circumferential direction and a second slot 72 arranged on the push rod joint seat 33 along the circumferential direction. A gear 73 which can move laterally therein and can engage with the first slot 71 and the second slot 72 at the same time is provided in the space enclosed by the front leg joint seat 13 and the push rod joint seat 33. A movable block 74 which can rotate relative to the push rod joint seat 33 and can push the gear 73 to disengage from the second slot 72 when rotating is provided between the gear 73 and the push rod joint seat 33. A driving member 75 which can push the movable block 74 to rotate is provided in the push rod joint seat 33. A reset spring 76 is provided between the leg joint seat 13 and the gear 73, which can push the gear 73 to reset. The driving member 75 includes a sliding plate 751 that can slide up and down in the push rod joint seat 33. The movable block 74 is provided with a step 752 that can contact the lower end of the sliding plate 751. The lower end of the upper push rod 32 is provided with a pushing portion (not shown in the figure) that can push the sliding plate 751 to slide when it is retracted in the downward push rod 31. A plurality of inclined bosses 81 are provided on the push rod joint seat 33 along the circumferential direction. The movable block 74 is provided with an inclined groove 82 that matches the inclined boss 81 and can be pushed by the inclined boss 81 when the movable block 74 rotates. In this embodiment, when the child stroller needs to be folded, the locking component 34 is first unlocked and the upper push rod 32 is pushed downward. During the process of the upper push rod 32 retracting into the lower push rod 31, the pushing part at the lower part of the lower push rod 32 pushes the sliding piece 751 to slide downward, and the lower end of the sliding piece 751 pushes the step 752 on the movable block 74, so that the movable block 74 is selected. Since the inclined groove 82 on the movable block 74 cooperates with the inclined boss 81 on the push rod joint seat 33, during the rotation of the movable block 74, the inclined boss 81 pushes the movable block 74 to move horizontally, and the movable block 74 pushes the gear 73 to disengage from the second slot 72 on the push rod joint seat 33. At this time, the reset spring 76 is compressed, and the gear 73 enters the first slot 71 completely. The push rod joint seat 33 is unlocked from the front leg joint seat 13, and the push rod assembly 3 can be rotated backward at this time, thereby realizing the folding of the child stroller. Of course, other locking devices of different structures can also be used, such as the engaging structure of the bayonet pin and the slot, which will not be repeated here.

[0035] The embodiment is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiment, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the present purpose.

Claims

1. A child stroller that can be moved from an unfolded position to a folded position after a locking device is unlocked, characterized in that: The invention comprises a front leg assembly (1), a rear leg assembly (2) and a push rod assembly (3), wherein the front leg assembly (1) comprises a front leg rod (11), the lower end of the front leg rod (11) is connected to a front wheel (12), the upper end of the front leg rod (11) is provided with a front leg joint seat (13), the push rod assembly (3) comprises a lower push rod (31) and an upper push rod (32) which can be unfolded or folded relative to the lower push rod (31), the lower end of the lower push rod (31) is provided with a push rod joint seat (33) which is rotatably connected to the front leg joint seat (13) around a first axis (A), and the rear leg assembly (2) comprises a first support rod (21) and a second support rod (22), the upper end of the first support rod (21) is rotatably connected to the front leg assembly (1) around a second axis (B) and is close to the front leg assembly The upper end of the second support rod (22) is rotatably connected to the push rod assembly (3) around the third axis (C) and is close to the lower end of the push rod assembly (3). The lower ends of the first support rod (21) and the second support rod (22) are rotatably connected to the rear wheel frame (23). The rear wheel frame (23) is connected to the rear wheel (24). The child stroller also includes a seat support member (4). The rear end of the seat support member (4) is rotatably connected to the front leg assembly (1) around the fourth axis (D). A transmission member (5) is provided between the front end of the seat support member (4), the front leg assembly (1) and the push rod assembly (3). When the push rod assembly (3) rotates toward the rear leg assembly (2), the seat support member (4) is moved toward the front leg assembly (1).

2. The baby stroller according to claim 1, characterized in that: The front leg assembly (1) also includes a connecting seat (14) connected to the front leg rod (11), the upper end of the first support rod (21) is rotatably connected to the connecting seat (14) around the second axis (B), the upper end of the second support rod (22) is rotatably connected to the push rod joint seat (33) around the third axis (C), and the rear end of the seat support (4) is rotatably connected to the eccentric position of the front leg joint seat (13) around the fourth axis (D).

3. The baby stroller according to claim 1 or 2, characterized in that: The transmission assembly (5) comprises a first transmission rod (51) rotatably connected to the front end of the seat support (4) around a fifth axis (E) and a second transmission rod (52) rotatably connected to the front leg rod (11) around a sixth axis (F), and the second transmission rod (52) is hinged to the first transmission rod (51) around a seventh axis (G), and a third transmission rod (53) hinged to the first transmission rod (51) or the second transmission rod (52) and the push rod joint seat (33) is also provided between the eccentric position of the first transmission rod (51) or the second transmission rod (52) and the push rod joint seat (33).

4. The baby stroller according to claim 3, characterized in that: The first transmission rod (51), the second transmission rod (52) and the third transmission rod (53) are coaxially hinged around the seventh axis (G), and the third transmission rod (53) is rotatably connected to the push rod joint seat (33) around the ninth axis (H).

5. The baby stroller according to claim 1, characterized in that: The seat support (4) is provided with a foldable seat assembly (6), the seat assembly (6) comprising a seat plate (61) connected to the seat support (4), a backrest (62) capable of rotating, folding or unfolding relative to the seat plate (61) being provided at the rear side of the seat plate (61), an armrest (63) capable of rotating, unfolding or folding relative to the seat plate (61) being connected to the backrest (62), and a leg support frame (64) capable of rotating relative to the seat plate (61) being provided at the front end of the seat plate (61).

6. The stroller according to claim 1, characterized in that: The lower end of the front leg rod (11) is fixedly connected to a transverse front wheel frame (15), and the front wheel (12) is connected to the front wheel frame (15).

7. The stroller according to claim 6, characterized in that: There are two front leg rods (11) which form an eight-shaped shape with each other, there are two front leg joint seats (13), there is one upper push rod (32) and one lower push rod (31), and the push rod joint seat (33) is arranged between the two front leg joint seats (13), there are two first support rods (21) which form an eight-shaped shape with each other, and there are two second support rods (22) which form a V-shape with each other.

8. The stroller according to claim 7, characterized in that: The upper push rod (32) is slidably connected to the lower push rod (31), and a locking component (34) is provided between the upper push rod (32) and the lower push rod (31) for locking the relative positions of the two.

9. The stroller according to claim 8, characterized in that: The locking device comprises a first slot (71) arranged on the front leg joint seat (13) along the circumferential direction and a second slot (72) arranged on the push rod joint seat (33) along the circumferential direction; a gear (73) capable of moving laterally therein and engaging with the first slot (71) and the second slot (72) at the same time is arranged in the space enclosed by the front leg joint seat (13) and the push rod joint seat (33); a movable block (74) capable of rotating relative to the push rod joint seat (33) and pushing the gear (73) to disengage from the second slot (72) when rotating is arranged between the gear (73) and the push rod joint seat (33); a driving member (75) capable of pushing the movable block (74) to rotate is arranged in the push rod joint seat (33); and a reset spring (76) capable of pushing the gear (73) to reset is arranged between the front leg joint seat (13) and the gear (73).

10. The baby stroller according to claim 9, characterized in that: The driving member (75) includes a sliding plate (751) that can slide up and down in the push rod joint seat (33), the movable block (74) is provided with a step (752) that can contact the lower end of the sliding plate (751), the lower end of the upper push rod (32) is provided with a pushing portion that can push the sliding plate (751) to slide when it is retracted in the downward push rod (31), the push rod joint seat (33) is provided with a plurality of inclined bosses (81) along the circumferential direction, and the movable block (74) is provided with an inclined groove (82) that matches the inclined boss (81) and can be pushed by the inclined boss (81) when the movable block (74) rotates.

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