Stroller framework

Abstract

The framework comprises a foldable bottom supporting frame, the bottom supporting frame comprises front legs and rear legs rotatably connected with the front legs around a first axis, front wheels are arranged at the lower ends of the front legs, and rear wheels are arranged at the lower ends of the rear legs; a push rod assembly is rotatably connected to the bottom supporting frame around a second axis, a traction assembly capable of pulling the front legs to rotate and draw close to the rear legs when the push rod assembly rotates and draws close to the rear legs is arranged between the push rod assembly and the bottom supporting frame, and a seat frame is further rotatably connected to the bottom supporting frame around a third axis. A linkage assembly is further arranged between the seat frame and the bottom supporting frame, and the linkage assembly can slide downwards relative to the front legs to drive the seat frame to be close to the bottom supporting frame when the front legs rotate to be close to the rear legs. The folding chair is simple in structure and flexible to fold.

Description

[Technical field]

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

[0002] With the development of society, strollers have become a must-have tool for infants and young children to travel. In addition to the basic requirements of safety and stability of strollers, parents pay more and more attention to the characteristics of strollers such as easy folding, small size, and easy storage. In view of this, at present, strollers generally have a foldable function. When in use, the stroller is unfolded, and when not in use, the stroller is folded to facilitate carrying and reduce space occupied. Moreover, there are many different types of strollers on the market, and the folding principles are different.

[0003] The present invention provides a new embodiment which is different from the prior art. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a child stroller frame with a simple structure and flexible folding.

[0005] The present invention is achieved through the following technical solutions:

[0006] A child stroller frame can be moved from an unfolded position to a folded position after a locking device is unlocked, comprising a foldable bottom support frame, the bottom support frame comprising front legs and rear legs rotatably connected to the front legs around a first axis, the front legs are provided with front wheels at the lower ends, the rear legs are provided with rear wheels at the lower ends, a push rod assembly is rotatably connected to the bottom support frame around a second axis, a traction assembly is provided between the push rod assembly and the bottom support frame which can pull the front legs to rotate toward the rear legs when the push rod assembly rotates toward the rear legs, a seat frame is also rotatably connected to the bottom support frame around a third axis, and a linkage assembly is provided between the seat frame and the bottom support frame which can slide downward relative to the front legs to drive the seat frame to move closer to the bottom support frame when the front legs rotate relative to the rear legs.

[0007] The linkage assembly includes a first linkage rod and a second linkage rod. The upper end of the first linkage rod is rotatably connected to the front side of the seat frame around a fourth axis, the second linkage rod is rotatably connected to the rear leg around a fifth axis, and the second linkage rod is hinged to the lower part of the first linkage rod and can slide up and down along the front leg.

[0008] The seat frame includes a front side frame and a rear side frame rotatably connected to the front side frame around a sixth axis, the rear side frame is rotatably connected to the upper end of the rear leg around the third axis, and the upper end of the first linkage rod is rotatably connected to the front part of the front side frame around the fourth axis.

[0009] A slide groove is provided on the front leg, a sliding block capable of sliding is provided in the slide groove, and the lower end of the first linkage rod is rotatably connected to the sliding block around the seventh axis.

[0010] A convex block is provided at the lower end of the push rod assembly and a positioning block is provided at the rear side of the seat frame for abutting against the convex block when the frame of the child stroller is in an unfolded state.

[0011] The push rod assembly includes a lower push rod and an upper push rod, the lower end of the lower push rod is rotatably connected to the hind leg around the second axis, the upper end of the lower push rod is rotatably connected to the upper push rod around the eighth axis and is close to the lower end of the upper push rod, the traction assembly includes a traction rod, the upper end of the traction rod is rotatably connected to the lower end of the upper push rod around the ninth axis, the upper end of the traction rod is rotatably connected to the hind leg around the tenth axis near its lower end, and a transmission member is provided between the lower end of the traction rod and the front leg and the hind leg, which can pull the front leg and the hind leg to rotate closer when the traction rod rotates relative to the hind leg.

[0012] The transmission member includes a first transmission rod, a second transmission rod and a third transmission rod. The front end of the first transmission rod is rotatably connected to the front leg around an eleventh axis, the rear end of the first transmission rod is rotatably connected to the front end of the second transmission rod around a twelfth axis, the rear end of the second transmission rod is rotatably connected to the rear leg around a thirteenth axis, the upper end of the third transmission rod is rotatably connected to the traction rod around a fourteenth axis, and the lower end of the third transmission rod is rotatably connected to the first transmission rod or the second transmission rod around a fifteenth axis.

[0013] The child stroller frame also includes an armrest assembly, which includes a sliding sleeve rotatably connected to the lower push rod around a sixteenth axis, a handrail rod that can slide therein is inserted into the sliding sleeve, a handrail handle is provided at the front end of the handrail rod, and the rear end of the handrail rod is rotatably connected to the traction rod around a seventeenth axis.

[0014] The front end of the seat frame can also be rotatably connected with a leg supporting plate.

[0015] An elastic band is also arranged between the lower ends of the front legs and the rear legs.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. During the folding process of the stroller frame of the present invention, the push rod assembly rotates toward the rear legs and simultaneously causes the front legs to rotate toward the rear legs through the traction assembly. At the same time, the front legs cause the linkage assembly to slide along them to drive the seat frame to fold and move toward the front legs. The entire structure is simple and compact, flexible to fold, and small in size after folding, which is suitable for promotion and application.

[0018] 2. The lower push rod of the present invention is rotatably connected with a sliding sleeve. When the stroller frame is folded, the armrest rod slides backward in the sliding sleeve, so that the armrest does not extend too long when the stroller frame is in the folded state, further reducing the volume of the stroller frame in the folded state, making it easy to carry or store.

[0019] 3. The invention has a simple and compact structure, is flexible to fold, and has a small volume after folding. It can be carried in an airplane luggage rack or placed in a car trunk for travel, and is very convenient to carry.

Brief Description of the Drawings

[0020] Figure 1 It is a stereogram of the present invention;

[0021] Figure 2 is a side view of the present invention;

[0022] Figure 3 is a cross-sectional view of the present invention in an expanded state;

[0023] Figure 4 is a side view of the present invention during the folding process;

[0024] Figure 5 is a cross-sectional view of the present invention during the folding process;

[0025] Figure 6 is a side view of the present invention in a folded state;

[0026] Figure 7 It is one of the three-dimensional views of the components of the present invention;

[0027] Figure 8 It is the second stereogram of the components of the present invention. [Specific implementation method]

[0028] The present invention will be further described below in conjunction with the accompanying drawings:

[0029] like Figures 1 to 6 As shown, a child stroller frame can be moved from an unfolded position to a folded position after a locking device is unlocked. In the unfolded position, the child stroller frame can be used for riding, while in the folded position, it is convenient for storage or carrying. The child stroller frame has a multi-link linkage folding structure, which can achieve rapid folding through the coordinated movement of various components, significantly reducing the storage volume.

[0030] like Figures 1 to 6As shown, the child stroller frame includes a foldable bottom support frame 1, the bottom support frame 1 includes a front leg 11 and a rear leg 12 rotatably connected to the front leg 1 around a first axis A, a front wheel 13 is provided at the lower end of the front leg 11, and a rear wheel 14 is provided at the lower end of the rear leg 12. A push rod assembly 2 is rotatably connected to the bottom support frame 1 around a second axis B, and a traction assembly 3 is provided between the push rod assembly 2 and the bottom support frame 1. When the push rod assembly 2 rotates and folds toward the rear leg 12, the front leg 11 is synchronously rotated and brought closer to the rear leg 12 through the traction of the traction assembly 3, so that the front leg 11 and the rear leg 12 are folded in coordination. The bottom support frame 1 is also rotatably connected to a seat frame 4 around a third axis C, and the seat frame 4 can be used for children to sit on. The front end of the seat frame 4 is rotatably connected to a leg support plate 44 that can support the legs. A linkage assembly 5 is also provided between the seat frame 4 and the bottom support frame 1, which can slide downward relative to the front leg 11 and drive the seat frame 4 to move closer to the bottom support frame 1 when the front leg 11 moves closer to the rear leg 12. When the front leg 11 moves closer to the rear leg 12, the linkage assembly 5 slides along the front leg 11 and drives the seat frame 4 to rotate relative to the bottom support frame 1, so that the seat frame 4 is automatically folded into the folding space formed by the front leg 11 and the rear leg 12. The folding of the child stroller frame of the present invention can achieve the linkage action of moving the front leg 11 closer to the rear leg 12 and folding the seat frame 4 between the front leg 11 and the rear leg 12 as long as the push rod assembly 2 moves closer relative to the rear leg 12. The entire folding process is flexible, and the folded volume is small, so it can be placed in the luggage rack of an airplane for travel, which is very convenient to carry.

[0031] like Figures 1 to 5 As shown, the linkage assembly 5 includes a first linkage rod 51 and a second linkage rod 52. The upper end of the first linkage rod 51 is rotatably connected to the front side of the seat frame 4 around the fourth axis D, and the second linkage rod 52 is rotatably connected to the rear leg 12 around the fifth axis E. The second linkage rod 52 is hinged to the lower part of the first linkage rod 51 and can slide up and down along the front leg 11. In the process of the front leg 11 rotating and approaching the rear leg 12, the front leg 11 applies a force to the lower end of the first linkage rod 51, so that the lower ends of the first linkage rod 51 and the second linkage rod 52 slide downward along the front leg 11, and the first linkage rod 51 pulls the seat frame 4 to rotate relative to the bottom support frame 1, so that the seat frame 4 is folded and folded onto the bottom support frame 1. The second linkage rod 52 cooperates with the first linkage rod 51 to ensure smooth folding and enhance the bearing strength of the seat frame 4 when the child stroller frame is in the unfolded state.

[0032] like Figure 3 and Figure 5As shown, the front leg 11 is provided with a slide groove 15, and a sliding block 53 is provided in the slide groove 15. The lower end of the first linkage rod 51 is rotatably connected to the slider 53 around the seventh axis G, ensuring that the child stroller frame can be folded flexibly and smoothly.

[0033] like Figures 1 to 5 As shown, the seat frame 4 includes a front frame 41 and a rear frame 42 rotatably connected to the front frame 41 around the sixth axis F. The seat frame 4 adopts a two-section structure of the front frame 41 and the rear frame 42. After the child stroller frame is folded, the folded volume can be further reduced, the occupied space can be reduced, and the user can carry it more conveniently. The rear frame 42 is rotatably connected to the upper end of the rear leg 12 around the third axis C, and the upper end of the first linkage rod 51 is rotatably connected to the front of the front frame 41 around the fourth axis D. Figure 6 As shown, after the child stroller frame is folded, the front side frame 41 is close to the front leg 11, and the rear side frame 42 extends roughly along the thickness direction of the child stroller frame in the folded state, which ensures that the volume of the child stroller frame in the folded state is small and that it can be folded smoothly.

[0034] like Figure 7 and Figure 8 As shown, the lower end of the push rod assembly 2 is provided with a laterally protruding protrusion 21, and the rear side of the seat frame 4 is provided with a positioning block 43 that abuts against the protrusion 21 when the child stroller frame is in the unfolded state. Through the abutment between the positioning block 43 and the protrusion 21, the child stroller frame can be made more stable and secure in the unfolded state.

[0035] like Figures 1 to 5 As shown, the push rod assembly 2 includes a lower push rod 22 and an upper push rod 23, the lower end of the lower push rod 22 is rotatably connected to the rear leg 12 around the second axis B, the upper end of the lower push rod 22 is rotatably connected to the upper push rod 23 around the eighth axis H and is close to the lower end of the upper push rod 23, the traction assembly 3 includes a traction rod 31, the upper end of the traction rod 31 is rotatably connected to the lower end of the upper push rod 23 around the ninth axis I, the upper end of the traction rod 31 and the rear leg 12 are rotatably connected around the tenth axis J near its lower end, and a transmission member 32 is provided between the lower end of the traction rod 31 and the front leg 11 and the rear leg 12, which can pull the front leg 11 and the rear leg 12 to rotate closer when the traction rod 31 rotates relative to the rear leg 12. When the frame of the child stroller is folded, the upper push rod 23 is rotated forward and pressed downward, and the lower end of the upper push rod 23 pushes the traction rod 31 to rotate relative to the rear leg 12, and the lower end of the traction rod 31 tilts upward to pull the transmission member 32 to move, and the transmission member 32 drives the front leg 11 to rotate and move closer to the rear leg 12. At this time, the slider 53 slides downward along the front leg 11, and the first linkage rod 51 pulls the seat frame 4 to fold accordingly. Therefore, the entire folding operation can be achieved by simply rotating the upper push rod 23 forward and pressing it downward, and the folding operation is very convenient.

[0036] like Figures 1 to 5 As shown, the transmission member 32 includes a first transmission rod 321, a second transmission rod 322 and a third transmission rod 323. The front end of the first transmission rod 321 is rotatably connected to the front leg 11 around the eleventh axis K, the rear end of the first transmission rod 321 is rotatably connected to the front end of the second transmission rod 322 around the twelfth axis L, the rear end of the second transmission rod 322 is rotatably connected to the rear leg 12 around the thirteenth axis M, the upper end of the third transmission rod 323 is rotatably connected to the traction rod 31 around the fourteenth axis N, and the lower end of the third transmission rod 323 is rotatably connected to the first transmission rod 321 or the second transmission rod 322 around the fifteenth axis P. When the traction rod 31 rotates upward relative to the rear leg 12 and tilts up, the lower end of the traction rod 31 pulls the third transmission rod 323, the third transmission rod 323 lifts the second transmission rod 322 upward, and the second transmission rod 322 pulls the first transmission rod 321, so that the front leg 11 rotates closer to the rear leg 12. In this embodiment, the lower end of the third transmission rod 323 is connected to the second transmission rod 322, so as to make the frame structure of the child stroller more compact and ensure more flexible folding.

[0037] like Figures 1 to 6 As shown, the child stroller frame also includes an armrest assembly 6, which includes a sliding sleeve 61 rotatably connected to the lower push rod 22 around the sixteenth axis Q, and a handrail rod 62 that can slide therein is inserted into the sliding sleeve 61, and a handrail handle 63 is provided at the front end of the handrail rod 62, and the rear end of the handrail rod 62 is rotatably connected to the traction rod 31 around the seventeenth axis R. During the rotation of the traction rod 3 relative to the rear leg 12, the traction rod 31 pulls the rear end of the handrail rod 62, so that the handrail rod 62 slides backward in the sliding sleeve 61, thereby moving the handrail 6 that originally extends forward for a long time backward. When the child stroller is in the folded state, the front end of the handrail 6 moves to a position close to the upper end of the rear leg 12, ensuring that the volume of the child stroller frame is small in the folded state.

[0038] An elastic band (not shown in the figure) may also be provided between the lower ends of the front legs 11 and the rear legs 12. When the stroller is unfolded, the elastic band is in a tensioned state. When the stroller is folded, the upper push rod 23 only needs to be slightly turned forward after the locking device is unlocked, and the elastic band will elastically recover and pull the front legs 11 and the rear legs 12, so that the stroller frame can be automatically folded and folded, making it easier and faster for the user to fold the stroller frame. In the present invention, the locking device may adopt a conventional locking structure, such as a gear locking structure and a bayonet and bayonet hole engagement structure, which will not be described in detail here.

[0039] The child stroller frame of the present invention can be folded quickly by the linkage of multiple rods, and is flexible to fold and easy to operate. After the locking device is unlocked, the push rod assembly 2 rotates and folds toward the rear leg 12, and the traction assembly 3 pulls the front leg 11 toward the rear leg 12 simultaneously, and the linkage assembly 5 drives the seat frame 4 to slide down along the front leg 11, so that the components are compactly folded. After folding, the front and rear wheels 13 and 14 are aligned side by side, and the lower end of the upper push rod 23 can be against the ground and form a common support with the rear wheel 14 to keep the child stroller frame in the folded state standing, which is convenient for carrying and storage. The overall volume of the child stroller frame in the folded state is significantly reduced, and the size meets the standards for aviation carry-on luggage, and can be easily placed in the luggage rack of the aircraft. When folding, you only need to push the upper push rod 23 slightly to automatically complete the folding, which is convenient for one-handed operation and carrying, very convenient to use, and suitable for promotion and application.

[0040] The present 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 foldable bottom support frame (1), wherein the bottom support frame (1) comprises a front leg (11) and a rear leg (12) rotatably connected to the front leg (1) around a first axis (A), a front wheel (13) is provided at the lower end of the front leg (11), and a rear wheel (14) is provided at the lower end of the rear leg (12), a push rod assembly (2) is rotatably connected to the bottom support frame (1) around a second axis (B), and a push rod assembly (2) is provided between the push rod assembly (2) and the bottom support frame (1). (2) a traction assembly (3) capable of pulling the front legs (11) to rotate and move toward the rear legs (12); the bottom support frame (1) is also rotatably connected to a seat frame (4) around a third axis (C); a linkage assembly (5) is also provided between the seat frame (4) and the bottom support frame (1) and capable of sliding downward relative to the front legs (11) and driving the seat frame (4) to move toward the bottom support frame (1) when the front legs (11) rotate and move toward the rear legs (12).

2. The child stroller frame according to claim 1, characterized in that: The linkage assembly (5) comprises a first linkage rod (51) and a second linkage rod (52), wherein the upper end of the first linkage rod (51) is rotatably connected to the front side of the seat frame (4) around a fourth axis (D), and the second linkage rod (52) is rotatably connected to the rear leg (12) around a fifth axis (E), and the second linkage rod (52) and the lower part of the first linkage rod (51) are hinged to each other and can slide up and down along the front leg (11).

3. The child stroller frame according to claim 2, characterized in that: The seat frame (4) comprises a front side frame (41) and a rear side frame (42) rotatably connected to the front side frame (41) around a sixth axis (F); the rear side frame (42) is rotatably connected to the upper end of the rear leg (12) around the third axis (C); and the upper end of the first linkage rod (51) is rotatably connected to the front part of the front side frame (41) around the fourth axis (D).

4. The child stroller frame according to claim 2, characterized in that: The front leg (11) is provided with a slide groove (15), a sliding block (53) is provided in the slide groove (15), and the lower end of the first linkage rod (51) is rotatably connected to the sliding block (53) around the seventh axis (G).

5. The child stroller frame according to claim 1, characterized in that: The lower end of the push rod assembly (2) is provided with a laterally protruding bump (21), and the rear side of the seat frame (4) is provided with a positioning block (43) which abuts against the bump (21) when the child stroller frame is in an unfolded state.

6. The child stroller frame according to any one of claims 1 to 5, characterized in that: The push rod assembly (2) comprises a lower push rod (22) and an upper push rod (23), the lower end of the lower push rod (22) is rotatably connected to the rear leg (12) around the second axis (B), the upper end of the lower push rod (22) is rotatably connected to the upper push rod (23) around the eighth axis (H) and is close to the lower end of the upper push rod (23), the traction assembly (3) comprises a traction rod (31), the upper end of the traction rod (31) is rotatably connected to the lower end of the upper push rod (23) around the ninth axis (I), the upper end of the traction rod (31) is rotatably connected to the rear leg (12) around the tenth axis (J) near its lower end, and a transmission member (32) is provided between the lower end of the traction rod (31) and the front leg (11) and the rear leg (12), which can pull the front leg (11) and the rear leg (12) to rotate closer when the traction rod (31) rotates relative to the rear leg (12).

7. The child stroller frame according to claim 6, characterized in that: The transmission member (32) comprises a first transmission rod (321), a second transmission rod (322) and a third transmission rod (323); the front end of the first transmission rod (321) is rotatably connected to the front leg (11) around an eleventh axis (K); the rear end of the first transmission rod (321) is rotatably connected to the front end of the second transmission rod (322) around a twelfth axis (L); the rear end of the second transmission rod (322) is rotatably connected to the rear leg (12) around a thirteenth axis (M); the upper end of the third transmission rod (323) is rotatably connected to the traction rod (31) around a fourteenth axis (N); and the lower end of the third transmission rod (323) is rotatably connected to the first transmission rod (321) or the second transmission rod (322) around a fifteenth axis (P).

8. The child stroller frame according to claim 6, characterized in that: The child stroller frame also includes an armrest assembly (6), the armrest assembly (6) includes a sliding sleeve (61) rotatably connected to the lower push rod (22) around a sixteenth axis (Q), a handrail rod (62) capable of sliding therein is inserted into the sliding sleeve (61), a handrail handle (63) is provided at the front end of the handrail rod (62), and the rear end of the handrail rod (62) is rotatably connected to the traction rod (31) around a seventeenth axis (R).

9. The child stroller frame according to claim 1, characterized in that: The front end of the seat frame (4) is also rotatably connected to a leg support plate (44).

10. The child stroller frame according to claim 1, characterized in that: An elastic band is also provided between the lower ends of the front legs (11) and the rear legs (12).

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