A child stroller frame

Abstract

The utility model discloses a child stroller frame, comprising a front leg connected with a front wheel, a rear leg connected with a rear wheel and a push rod assembly, wherein a front leg seat is fixedly provided at the upper end of the front leg, a rear leg seat is fixedly provided at the upper end of the rear leg, the push rod assembly comprises a lower push rod and an upper push rod which can be movably unfolded or folded relative to the lower push rod, a push rod seat is fixedly provided at the lower end of the lower push rod, the push rod seat is rotatably connected to the rear leg seat around a first axis, the front leg seat and the rear leg seat are rotatably connected around a second axis, a locking device is arranged between the rear leg seat and the push rod seat, a transverse locking shaft is arranged on the push rod seat, a locking piece which can be rotated relative to the rear leg seat around a fourth axis is arranged on the rear leg seat, a locking groove which can be engaged with or disengaged from the locking shaft during rotation is arranged on the locking piece between the rear leg seat and the locking piece, and a locking piece which can keep the locking groove and the locking shaft locked when the child stroller frame is in an unfolded state is arranged, and an unlocking piece which can drive the locking piece to unlock is arranged in the push rod seat. The utility model has a simple structure and stable locking.

Description

[Technical field]

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

[0002] Strollers are common products for infants and young children to grow up. Currently, strollers on the market can generally be unfolded or folded. In the unfolded state, they are used by infants and young children, and in the folded state, they are easy to carry or store. In addition, the structures of the frames of current strollers are also various. Many strollers are prone to shaking after being locked in the unfolded state, and the locking is not secure. Therefore, the utility model also provides a new implementation scheme. [Contents of the utility model]

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a child stroller frame with a simple structure and stable locking.

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

[0005] A child stroller frame, which can be moved from an unfolded position to a folded position after a locking device is unlocked, comprises a front leg 1 connected to a front wheel 1a, a rear leg 2 connected to a rear wheel 2a and a push rod assembly 3, wherein the upper end of the front leg 1 is fixedly provided with a front leg seat 11, the upper end of the rear leg 2 is fixedly provided with a rear leg seat 21, the push rod assembly 3 comprises a lower push rod 31 and an upper push rod 32 which can be movably unfolded or folded relative to the lower push rod 31, the lower end of the lower push rod 31 is fixedly provided with a push rod seat 33, the push rod seat 33 is rotatably connected to the rear leg seat 21 around a first axis A, and the front leg seat 11 is rotatably connected to the rear leg seat 21 around a first axis A. The second axis B is rotatably connected, and the locking device is arranged between the rear leg seat 21 and the push rod seat 33. The push rod seat 33 is provided with a transverse locking shaft 61, and the rear leg seat 21 is provided with a locking plate 62 which can rotate relative to it around the fourth axis D. The locking plate 62 is provided with a locking groove 63 which can engage or disengage with the locking shaft 61 when rotating. A locking member 64 is provided between the rear leg seat 21 and the locking plate 62, which can keep the locking groove 63 and the locking shaft 61 locked when the stroller frame is in the unfolded state, and an unlocking member 65 which can drive the locking member 64 to unlock is provided in the push rod seat 33.

[0006] The locking member 64 includes a locking block 641 that can slide in the rear leg seat 21, the locking plate 62 is provided with a locking groove 642 that can engage with or disengage from the locking block 641, and a first return spring 643 that can push the locking block 641 to slide and return is provided between the locking block 641 and the rear leg seat 21.

[0007] The locking block 641 includes a main body 6411, a clearance groove 6412 is formed on the main body 6411, the locking piece 62 is located in the clearance groove 6412, and a protrusion 6413 protruding from the other side of the locking piece 62 is formed on the main body 6411, and the protrusion 6413 is abutted against the unlocking piece 65.

[0008] The unlocking member 65 includes an unlocking block 651 that can slide in the push rod seat 33 and push the protrusion 6413 to disengage the locking block 641 from the locking groove 642. The upper push rod 32 is provided with a pushing portion 652 that can drive the unlocking block 651 to slide when it is retracted relative to the lower push rod 31.

[0009] The lower push rod 31 is tubular, the unlocking block 651 extends into the tube, the upper push rod 32 is slidably connected to the lower push rod 31, and the pushing portion 652 is arranged at the lower end of the upper push rod 32.

[0010] The locking piece 62 is provided with a butting portion 66 , and a second spring 67 is provided between the butting portion 66 and the rear leg seat 21 , which can push the locking piece 62 to rotate when the locking member 64 is unlocked, thereby disengaging the locking groove 63 from the locking shaft 61 .

[0011] The locking piece 62 is provided with a pushing edge 68 which can be pushed by the locking shaft 61 to rotate the locking piece 62 when the stroller frame moves from the folded position to the unfolded position.

[0012] A linkage rod 4 is provided on the push rod seat 33 and deviates from the first axis A between the front leg seat 11 or the front leg 1, which can pull the front leg 1 to rotate toward the rear leg 2 around the second axis B when the push rod assembly 3 is rotated and folded relative to the rear leg 2 around the first axis A. One end of the linkage rod 4 is rotatably connected to the push rod seat 33 around the fifth axis E, and the other end is rotatably connected to the front leg seat 11 around the sixth axis F.

[0013] The stroller frame also includes a seat support assembly 5, which includes a front support rod 51 with one end rotatably connected to the rear leg seat 21 around a three-axis line C, and a seat support seat 52 hingedly connected to the front support rod 51 and the push rod assembly 3 is provided between the front support rod 51 and the push rod assembly 3.

[0014] The push rod seat 33 is provided with an extension rod 34 extending forward, and the rear end of the seat support seat 52 is rotatably connected to the extension rod 34 .

[0015] Compared with the prior art, the utility model has the following advantages: the utility model stroller is provided with a rotatable locking piece on the rear leg seat, and the locking groove on the locking piece is engaged with the locking shaft on the push rod seat, and the locking piece and the rear leg seat are relatively locked when the stroller frame is in the unfolded state, so that the stroller frame can be less shaken in the unfolded state and more stable to use. In addition, when the stroller is folded, the upper push rod and the lower push rod are folded with each other, and then the push rod assembly is rotated backward around the first axis, and the push rod assembly rotates and approaches the rear leg. In this process, the linkage rod on the push rod seat pulls the front leg and the front leg seat to rotate and approach the rear leg around the second axis, and in the process of the push rod assembly rotating backward, the push rod assembly also pulls the seat support seat, thereby pulling the front support rod to rotate relative to the seat support seat and the rear leg seat, so that the seat support seat and the front support rod also move closer to the rear leg seat and the rear leg, thereby realizing the folding of the entire stroller frame. The entire stroller frame has a simple structure. You only need to fold and close the upper push rod first, and then rotate the push rod assembly backward to realize the linkage folding of the front legs and the seat support assembly. The folding operation is very convenient and quick, and it is easy to carry or store after folding, which is suitable for promotion and application.

Brief Description of the Drawings

[0016] Figure 1 It is a three-dimensional diagram of the utility model in the unfolded state;

[0017] Figure 2 It is a side view of the utility model in the unfolded state;

[0018] Figure 3 It is a side view of the utility model during the folding process;

[0019] Figure 4 It is a side view of the folded state of the components of the utility model;

[0020] Figure 5 It is a three-dimensional diagram of the components of the utility model;

[0021] Figure 6 It is one of the cross-sectional views of the components of the utility model;

[0022] Figure 7 This is the second cross-sectional view of the components of the utility model;

[0023] Figure 8 yes Figure 7 Enlarged view at G in the middle;

[0024] Fig. 9 It is an exploded view of the components of the utility model;

[0025] Fig.10 yes Fig. 9 Magnified view at H in the middle. [Specific implementation method]

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] like Figures 1 to 8 , Figures 6 to 10 As shown, a child stroller frame can be moved from an unfolded position to a folded position after a locking device is unlocked, comprising a front leg 1 connected to a front wheel 1a, a rear leg 2 connected to a rear wheel 2a and a push rod assembly 3, wherein the upper end of the front leg 1 is fixedly provided with a front leg seat 11, the upper end of the rear leg 2 is fixedly provided with a rear leg seat 21, the push rod assembly 3 comprises a lower push rod 31 and an upper push rod 32 which can be movably unfolded or folded relative to the lower push rod 31, the lower end of the lower push rod 31 is fixedly provided with a push rod seat 33, the push rod seat 33 is rotatably connected to the rear leg seat 21 around a first axis A, the push rod seat 33 is rotatably connected to the rear leg seat 21 via a connecting shaft 22, and the The front leg seat 11 and the rear leg seat 21 are rotatably connected around the second axis B, the locking device is arranged between the rear leg seat 21 and the push rod seat 33, the push rod seat 33 is provided with a transverse locking shaft 61, the rear leg seat 21 is provided with a locking piece 62 which can rotate relative to it around the fourth axis D, the locking piece 62 is provided with a locking groove 63 which can engage or disengage with the locking shaft 61 when rotating, a locking member 64 is provided between the rear leg seat 21 and the locking piece 62 which can keep the locking groove 63 and the locking shaft 61 locked when the stroller frame is in the unfolded state, and an unlocking member 65 which can drive the locking member 64 to unlock is provided in the push rod seat 33. Figures 6 to 10 As shown, when the locking groove 63 is engaged with the locking shaft 61 and the locking member 64 locks the relative position of the locking piece 62 and the rear leg seat 21, the push rod assembly 3 cannot rotate backward relative to the rear leg 2, and the child stroller frame remains in the unfolded state, and the swing is small and very stable in the unfolded state. When the child stroller frame needs to be folded, the locking member 64 is first unlocked by the unlocking member 65, and the locking piece 62 can rotate relative to the rear leg seat 21. At this time, the push rod assembly 3 can be directly rotated backward, thereby realizing the folding of the child stroller frame.

[0028] like Figures 1 to 8As shown, a linkage rod 4 is provided on the push rod seat 33 and deviates from the first axis A between the front leg seat 11 or the front leg 1, which can pull the front leg 1 to rotate around the second axis B toward the rear leg 2 when the push rod assembly 3 is rotated and folded relative to the rear leg 2 around the first axis A. The child stroller frame also includes a seat support assembly 5, and the seat support assembly 5 includes a front strut 51 at one end rotatably connected to the rear leg seat 21 around the three-axis line C, and a seat support seat 52 is provided between the front strut 51 and the push rod assembly 3 to be hinged to the two. When folding, first unlock the locking device, then fold the upper push rod 32 and the lower push rod 31 together, then rotate the push rod assembly 3 backward around the first axis A, and the push rod assembly 3 rotates and approaches the rear leg 2. In this process, the linkage rod 4 on the push rod seat 33 pulls the front leg 1 and the front leg seat 11 to rotate and approach the rear leg 2 around the second axis B. In addition, during the backward rotation of the push rod assembly 3, the push rod assembly 3 also pulls the seat support seat 52, thereby pulling the front support rod 51 and the seat support seat 52 and the rear leg seat 21 to rotate relative to each other, so that the seat support seat 52 and the front support rod 51 also move closer to the rear leg seat 21 and the rear leg 2, thereby realizing the folding of the entire child stroller frame. The entire child stroller frame has a simple structure, and only needs to fold and fold the upper push rod 32 first, and then rotate the push rod assembly 3 backward to realize the linkage folding of the front leg 2 and the seat support assembly 5. The folding operation is very convenient and quick, and it is easy to carry or store after folding. In the present embodiment, the seat support assembly 5 is connected with a foldable seat assembly 7 that can be rotated back and forth relative to the seat support assembly 5. Specifically, the foldable seat assembly 7 includes a seat plate 71 connected to the seat support seat 52. The front end of the seat plate 71 is provided with a front stopper 72 that can rotate relative to the seat plate. The rear side of the seat plate 71 is provided with a backrest rod 73 that can rotate relative to the seat plate. A flexible cushion 75 is sleeved on the backrest rod 73. A surrounding frame 74 that can rotate relative to the backrest rod 73 is provided between the middle of the backrest rod 73 and the upper end of the front stopper 72. When folding the stroller frame, the foldable seat assembly 7 is folded first, that is, the backrest rod 72 is rotated relative to the seat plate, so that the backrest rod 72, the surrounding frame 74 and the front stopper 72 are all rotated and close to the seat plate 71. In order to further reduce the occupied space of the stroller frame after folding, the stroller frame of the present embodiment is first adjusted to a rearward position (such as the left side) when folding the stroller frame. Figure 3 Of course, the foldable seat assembly 7 may not be provided, but the shape and structure of the seat support seat 52 may be changed so that the child can sit directly on the seat support seat 52.

[0029] like Figures 6 to 10As shown, the locking member 64 includes a locking block 641 that can slide in the rear leg seat 21, a locking groove 642 that can engage with or disengage from the locking block 641 is provided on the locking sheet 62, and a first return spring 643 that can push the locking block 641 to slide and return is provided between the locking block 641 and the rear leg seat 21. When the locking block 641 is engaged with the locking groove 642 on the locking sheet 62, the locking sheet 62 cannot rotate relative to the rear leg seat 21, and the locking groove 63 is kept engaged with the locking shaft 61, so that the child stroller frame remains in the unfolded state, and the shaking between the front leg 1 and the rear leg 2 of the child stroller frame is small, ensuring that the unfolded state of the child stroller frame is more stable and safe. When folding is required, the unlocking member 65 drives the locking member 64 to unlock.

[0030] like Figure 6 , Figure 8 and Fig.10 As shown, the locking block 641 includes a body 6411, a clearance groove 6412 is provided on the body 6411, the locking piece 62 is located in the clearance groove 6412, and a protrusion 6413 protruding from the other side of the locking piece 62 is provided on the body 6411, and the protrusion 6413 abuts against the unlocking piece 65. The locking piece 62 is arranged in the clearance groove 6412 and can rotate in the clearance groove 6412, and one end of the locking block 641 abuts against the first return spring 643, and the protrusion 6413 at the other end abuts against the unlocking piece 65. When the unlocking piece 65 pushes the protrusion 6413, the body 6411 retreats to compress the first return spring 643, and the locking block 641 is disengaged from the locking groove 642 on the locking piece 62. The whole structure is compact, and multiple components with a relatively active relationship are arranged in a narrow space, and the design is very clever.

[0031] like Figure 6 , Figure 8 and Fig.10 As shown, the unlocking member 65 includes an unlocking block 651 that can slide in the push rod seat 33 and can push the protrusion 6413 to disengage the locking block 641 from the locking groove 642. The upper push rod 32 is provided with a pushing portion 652 that can drive the unlocking block 651 to slide when it is retracted relative to the lower push rod 31. The lower push rod 31 is tubular, and the unlocking block 651 extends into the tube. The upper push rod 32 is slidably connected to the lower push rod 31, and the pushing portion 652 is provided at the lower end of the upper push rod 32. In this embodiment, the upper push rod 32 is slidably connected to the lower push rod 31. When the upper push rod 32 slides backward and retracts into the lower push rod 31, the pushing portion 652 at the lower end of the upper push rod 32 pushes the unlocking block 651 to slide, and the unlocking block 651 pushes the protrusion 6413, thereby disengaging the locking block 641 from the locking groove 642 on the locking plate 62. At this time, the push rod assembly 3 can be rotated around the first axis A, thereby realizing the folding of the child stroller frame.

[0032] like Figure 8 and Fig.10 As shown, the locking piece 62 is provided with a butting portion 66, and a second spring 67 is provided between the butting portion 66 and the rear leg seat 21, which can push the locking piece 62 to rotate when the locking piece 64 is unlocked, thereby disengaging the locking groove 63 from the locking shaft 61. When the child stroller frame is in an unfolded state, the second spring 67 is in a compressed state, so when the locking block 641 is disengaged from the locking groove 62 on the locking piece 62, the second spring 67 elastically recovers and pushes the butting portion 66, which can push the locking piece 62 to rotate and ensure that the locking groove 63 is quickly disengaged from the locking shaft 61, making it more convenient and smooth to unlock the locking device.

[0033] like Figure 8 and Fig.10 As shown, the locking piece 62 is provided with a pushing edge 68 which can be pushed by the locking shaft 61 to rotate the locking piece 62 when the child stroller frame moves from the folded position to the unfolded position. During the unfolding process of the child stroller frame, the locking shaft 61 pushes the pushing edge 68 to rotate the locking piece 62 relative to the rear leg seat 21. When the locking piece 62 rotates until the locking groove 642 is aligned with the locking block 641, the first return spring 643 pushes the locking block 641 to engage with the locking groove 642. At this time, the locking groove 63 is also engaged with the locking shaft 61, and the unfolded state of the child stroller frame is locked again.

[0034] In this embodiment, if Figure 3 , Figure 6 and Fig. 9 As shown, the push rod seat 33 is provided with an extension rod 34 extending forward, the rear end of the seat support seat 52 is rotatably connected to the extension rod 34, one end of the linkage rod 4 is rotatably connected to the push rod seat 33 around the fifth axis E, and the other end is rotatably connected to the front leg seat 11 around the sixth axis F, ensuring that the child stroller frame is smooth during the unfolding or folding process, and making the child stroller frame structure simple and compact.

[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 frame, which 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 (1) connected to a front wheel (1a), a rear leg (2) connected to a rear wheel (2a) and a push rod assembly (3); the upper end of the front leg (1) is fixedly provided with a front leg seat (11); the upper end of the rear leg (2) is fixedly provided with a rear leg seat (21); the push rod assembly (3) comprises a lower push rod (31) and an upper push rod (32) which can be movably unfolded or folded relative to the lower push rod (31); the lower end of the lower push rod (31) is fixedly provided with a push rod seat (33); the push rod seat (33) is rotatably connected to the rear leg seat (21) around a first axis (A); the front leg seat (11) is rotatably connected to the rear leg seat (21) around a second axis (B); The locking device is arranged between the rear leg seat (21) and the push rod seat (33), the push rod seat (33) is provided with a transverse locking shaft (61), the rear leg seat (21) is provided with a locking plate (62) which can rotate relative to the rear leg seat (21) around a fourth axis (D), the locking plate (62) is provided with a locking groove (63) which can engage with or disengage from the locking shaft (61) when rotating, a locking member (64) is provided between the rear leg seat (21) and the locking plate (62) which can keep the locking groove (63) and the locking shaft (61) locked when the child stroller frame is in an unfolded state, and an unlocking member (65) which can drive the locking member (64) to unlock is provided in the push rod seat (33).

2. The child stroller frame according to claim 1, characterized in that: The locking member (64) comprises a locking block (641) which can slide in the rear leg seat (21); the locking plate (62) is provided with a locking groove (642) which can engage with or disengage from the locking block (641); and a first return spring (643) which can push the locking block (641) to slide and return is provided between the locking block (641) and the rear leg seat (21).

3. The child stroller frame according to claim 2, characterized in that: The locking block (641) includes a main body (6411), a clearance groove (6412) is provided on the main body (6411), the locking piece (62) is located in the clearance groove (6412), and a protruding portion (6413) is provided on the main body (6411) protruding from the other side of the locking piece (62), and the protruding portion (6413) is abutted against the unlocking piece (65).

4. The child stroller frame according to claim 3, characterized in that: The unlocking member (65) includes an unlocking block (651) that can slide in the push rod seat (33) and can push the protrusion (6413) to disengage the locking block (641) from the locking groove (642), and the upper push rod (32) is provided with a pushing portion (652) that can drive the unlocking block (651) to slide when the upper push rod (32) is retracted relative to the lower push rod (31).

5. The child stroller frame according to claim 4, characterized in that: The lower push rod (31) is tubular, the unlocking block (651) extends into the tube, the upper push rod (32) is slidably connected to the lower push rod (31), and the pushing portion (652) is arranged at the lower end of the upper push rod (32).

6. The child stroller frame according to claim 1, characterized in that: The locking piece (62) is provided with a supporting portion (66), and a second spring (67) is provided between the supporting portion (66) and the rear leg seat (21) so as to push the locking piece (62) to rotate when the locking member (64) is unlocked, thereby disengaging the locking groove (63) from the locking shaft (61).

7. The child stroller frame according to claim 1, characterized in that: The locking piece (62) is provided with a pushing edge (68) which can be pushed by the locking shaft (61) to rotate the locking piece (62) when the child stroller frame moves from the folding position to the unfolding position.

8. The child stroller frame according to claim 1, characterized in that: A linkage rod (4) is provided on the push rod seat (33) and between the front leg seat (11) or the front leg (1) and a position deviating from the first axis (A). The linkage rod (4) can pull the front leg (1) to rotate and move closer to the rear leg (2) around the second axis (B) when the push rod assembly (3) rotates and folds relative to the rear leg (2) around the first axis (A). One end of the linkage rod (4) is rotatably connected to the push rod seat (33) around a fifth axis (E), and the other end is rotatably connected to the front leg seat (11) around a sixth axis (F).

9. The child stroller frame according to claim 1, characterized in that: The child stroller frame also includes a seat support assembly (5), the seat support assembly (5) includes a front support rod (51) one end of which is rotatably connected to the rear leg seat (21) around a three-axis line (C), and a seat support seat (52) is provided between the front support rod (51) and the push rod assembly (3) and is hinged to the two.

10. The child stroller frame according to claim 9, characterized in that: The push rod seat (33) is provided with an extension rod (34) extending forward, and the rear end of the seat support seat (52) is rotatably connected to the extension rod (34).

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