Stroller framework

Abstract

The utility model discloses a stroller framework which comprises a frame connected with a seat and wheels, the frame comprises a bottom supporting frame, the lower end of an inclined supporting rod is hinged to the rear portion of the bottom supporting frame around a first axis, and the lower end of a supporting rod is hinged to the upper end of the inclined supporting rod around a second axis. The position, close to the lower end of the hand push rod, of the hand push rod is hinged to the upper end of the supporting rod around a third axis, the upper end of the transmission rod is hinged to the lower end of the hand push rod around a fourth axis, and the lower portion of the transmission rod is hinged to the inclined supporting rod around a fifth axis. When the stroller framework is moved from the unfolding position to the folding position, the upper end of the hand push rod and the connecting position of the supporting rod and the inclined supporting rod are moved to the position close to the front end of the bottom supporting frame, and the connecting position of the transmission rod and the hand push rod is moved to the position close to the rear end of the bottom supporting frame. The folding chair is simple in structure and convenient to fold.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of children's pushchair framework. BACKGROUND

[0002] Children's pushchair is the common product in the growth process of infant, and its main components generally include frame, seat and wheels. In order to carry or store conveniently, the current children's pushchair framework can generally be folded. For example, a kind of children's pushchair (publication number CN220884521U) discloses a foldable children's pushchair, which needs to slide the support sleeve upward along the support frame when folding. The support sleeve can drive the front leg assembly and the rear leg assembly to fold towards the direction of the hand push frame during the upward sliding process. The front leg assembly and the rear leg assembly can drive the front leg support rod and the front leg assembly to fold with each other during the folding process, and can also drive the rear leg support rod and the rear leg assembly to fold with each other, so that the hand push frame, the front leg assembly, the rear leg assembly, the front leg support rod and the rear leg support rod are all folded in one place. Although the children's pushchair can be folded, it needs to hold the support frame with one hand and push the support sleeve to slide with the other hand when folding. Therefore, the folding operation needs to be performed with both hands, cannot be operated with one hand, is not convenient to operate, and the structure is also relatively complex.

[0003] Therefore, the utility model is just based on the above deficiencies. CONTENT OF UTILITY MODEL

[0004] The utility model aims at overcoming the deficiencies of prior art, and provides a children's pushchair framework with simple structure and convenient folding operation.

[0005] The utility model is implemented through the following technical solutions:

[0006] A children's pushchair framework can be moved from an unfolded position to a folded position after the locking device is unlocked, and includes a frame connected with a seat and wheels. The frame includes:

[0007] A bottom support frame;

[0008] An inclined support rod is hinged at the rear of the bottom support frame at the lower end around a first axis A;

[0009] A support rod is hinged at the upper end of the inclined support rod around a second axis B at the lower end;

[0010] A hand push rod is hinged at the upper end of the support rod around a third axis C near the lower end position;

[0011] A transmission rod is hinged at the lower end of the hand push rod around a fourth axis D at the upper end, and is hinged at the lower part of the inclined support rod around a fifth axis E;

[0012] A linkage is movably connected between the bottom support frame and the transmission rod;

[0013] When the child stroller frame is moved from its unfolded position to its folded position, the upper end of the handle bar and the joint between the support rod and the diagonal rod are moved to a position close to the front end of the bottom support frame, and the joint between the transmission rod and the handle bar is moved to a position close to the rear end of the bottom support frame.

[0014] The upper end of the transmission rod is hingedly connected to the diagonal rod around the fifth axis E, and the linkage comprises a linkage rod, one end of which is hingedly connected to the lower end of the transmission rod around the sixth axis F, and the other end of which is hingedly connected to the middle part of the bottom support frame around the seventh axis G. In the unfolded position, the projections of the support rod, the upper part of the diagonal rod, the transmission rod and the lower part of the handle bar on a vertical plane form a triangle, and the projections of the lower part of the diagonal rod, the lower part of the transmission rod, the linkage rod and the rear part of the bottom support frame on a vertical plane form a triangle.

[0015] The wheels comprise front wheels connected to the front side of the bottom support frame, and rear wheels connected to the rear side of the bottom support frame or the lower end of the diagonal rod, and the outer side of the upper end of the support rod is provided with a roof support rod which can rotate relative thereto.

[0016] The seat comprises a seat frame rod, the rear side of which is hingedly connected to the transmission rod around the eighth axis H, and a connecting rod is provided between the front side of the seat frame rod and the diagonal rod and hingedly connected thereto. Of course, the seat can also be a flexible seat pocket hung on the frame.

[0017] The child stroller frame further comprises a handrail assembly, which comprises a U-shaped handrail rod, the rear end of which is hingedly connected to the transmission rod around the ninth axis I, and a hinge rod is provided between the handrail rod and the front side of the seat frame rod and hingedly connected thereto.

[0018] The front end of the seat frame rod is connected to a leg support plate which can rotate relative thereto, and an adjusting device is provided between the leg support plate and the seat frame rod for adjusting the inclination angle of the leg support plate, the adjusting device comprising a fixed seat fixedly connected to the seat frame rod, a plurality of clamping grooves being provided on the fixed seat in the circumferential direction, a clamping block being provided in the leg support plate and being capable of sliding relative thereto and being capable of being clamped or disengaged from the clamping grooves, a handle being provided on the leg support plate and being connected to the clamping block and being capable of pulling the clamping block out of the clamping grooves, and a first reset spring being provided between the leg support plate and the clamping block and being capable of pushing the clamping block to slide and reset.

[0019] The locking device comprises a locking slot arranged at the upper end of the supporting rod, a clamping pin arranged in the hand pushing rod and capable of sliding in the hand pushing rod and capable of being clamped with or separated from the locking slot, an operating switch arranged at the upper end of the hand pushing rod, a pull rope arranged between the operating switch and the clamping pin and capable of pulling the clamping pin to separate from the locking slot, and a second reset spring arranged in the hand pushing rod and capable of pushing the clamping pin to slide and reset.

[0020] The oblique supporting rod is provided with an elastic sheet, the elastic sheet is provided with a clamping hole, and the hand pushing rod is provided with a clamping column capable of being clamped with the clamping hole when the child stroller framework is in the folded position.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] 1、The child stroller framework is folded, the locking device is unlocked first, then the hand pushing rod is pushed forward and pressed down, the supporting rod and the transmission rod rotate relative to the hand pushing rod, the lower part of the supporting rod and the transmission rod rotates relative to the oblique supporting rod, the transmission rod makes the linkage between the transmission rod and the bottom support frame movable, the lower end of the supporting rod also exerts pressure on the upper end of the oblique supporting rod, so that the oblique supporting rod rotates relative to the bottom support frame, finally the upper end of the hand pushing rod and the position where the supporting rod and the oblique supporting rod are connected move to the position close to the front end of the bottom support frame, the position where the transmission rod and the hand pushing rod are connected moves to the position close to the rear end of the bottom support frame, the hand pushing rod, the supporting rod, the transmission rod and the oblique supporting rod are all close to the bottom support frame to complete folding, the whole child stroller framework structure is simple, folding is flexible, only one hand is needed to operate when folding, folding operation is very convenient and fast.

[0023] 2、The transmission rod is hinged to the oblique supporting rod at the position close to the lower end, one end of the linkage rod is hinged to the lower end of the transmission rod, and the other end is hinged to the middle part of the bottom support frame, the linkage rod plays a supporting role when the child stroller framework is in the unfolded state, and the child stroller framework has sufficient bearing strength, when the child stroller framework is folded, the lower end of the transmission rod props up the upper end of the linkage rod when the transmission rod rotates relative to the oblique supporting rod, so that the linkage rod rotates relative to the transmission rod and the bottom support frame, thereby driving the oblique supporting rod to rotate relative to the bottom support frame and close to each other, the child stroller framework folding operation can be performed by one hand, and the child stroller framework folding is flexible.

[0024] 3、The projections of the supporting rod, the upper part of the oblique supporting rod, the transmission rod and the lower part of the hand pushing rod on the vertical plane enclose a triangle, and the projections of the lower part of the oblique supporting rod, the lower part of the transmission rod, the linkage rod and the rear part of the bottom support frame on the vertical plane also enclose a triangle, therefore, the whole child stroller framework has high stability and strong bearing capacity in the unfolded state.

DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a perspective view of the embodiment 1 of the utility model;

[0026] Figure 2 This is a side view of Embodiment 1 of this utility model in the unfolded position;

[0027] Figure 3 This is a side view of Embodiment 1 of this utility model during the folding process;

[0028] Figure 4 This is a side view of Embodiment 1 of this utility model in the folded position;

[0029] Figure 5 This is one of the exploded views of the components of Embodiment 1 of this utility model;

[0030] Figure 6 This is a perspective view of the component of Embodiment 1 of this utility model;

[0031] Figure 7 This is the second exploded view of a component of Embodiment 1 of this utility model;

[0032] Figure 8 This is a cross-sectional view of a component of Embodiment 1 of this utility model;

[0033] Figure 9 This is a perspective view of Embodiment 2 of this utility model;

[0034] Figure 10 This is a side view of Embodiment 2 of this utility model in the unfolded position;

[0035] Figure 11 This is a side view of Embodiment 2 of this utility model during the folding process;

[0036] Figure 12 This is a side view of Embodiment 3 of this utility model in the unfolded position;

[0037] Figure 13 This is a side view of Embodiment 3 of this utility model during the folding process.

Detailed Implementation Methods

[0038] The present invention will be further described below with reference to the accompanying drawings:

[0039] Example 1:

[0040] like Figures 1 to 4 As shown, a stroller frame can be moved from an unfolded position to a folded position after the locking device is unlocked. It includes a frame 3 connected to a seat 1 and wheels 2. The frame 3 includes:

[0041] Bottom support frame 31;

[0042] Diagonal brace 32, the lower end of which is hinged around the first axis A to the rear of the bottom support frame 31;

[0043] a support rod 33, the lower end of which is hinged to the upper end of the diagonal rod 32 about a second axis B, and the upper end of which is provided with a roof support rod 37 rotatable relative thereto;

[0044] a hand pushing rod 34, the upper end of which is hinged to the upper end of the support rod 33 about a third axis C;

[0045] a transmission rod 35, the upper end of which is hinged to the lower end of the hand pushing rod 34 about a fourth axis D, and the lower part of which is hinged to the diagonal rod 32 about a fifth axis E;

[0046] a linkage 36 movably connected between the bottom support frame 31 and the transmission rod 35;

[0047] When the child stroller frame is moved from its unfolded position to its folded position, the upper end of the hand pushing rod 34 and the position where the support rod 33 meets the diagonal rod 32 are moved to a position close to the front end of the bottom support frame 31, and the position where the transmission rod 35 meets the hand pushing rod 34 is moved to a position close to the rear end of the bottom support frame 31.

[0048] As shown in Figures 1 to 4 the child stroller frame is folded, the locking device is first unlocked, then the hand pushing rod 34 is pushed forward and pressed down, the support rod 33 and the transmission rod 35 rotate relative to the hand pushing rod 34, the lower part of the support rod 33 and the transmission rod 35 rotate relative to the diagonal rod 32, the transmission rod 35 moves the linkage 36 between it and the bottom support frame 31, and the lower end of the support rod 33 also exerts pressure on the upper end of the diagonal rod 32, thereby causing the diagonal rod 32 to rotate relative to the bottom support frame 31, and finally the upper end of the hand pushing rod 34 and the position where the support rod 33 meets the diagonal rod 32 are moved to a position close to the front end of the bottom support frame 31, and the position where the transmission rod 35 meets the hand pushing rod 34 is moved to a position close to the rear end of the bottom support frame 31, achieving the folding of the hand pushing rod 34, the support rod 33, the transmission rod 35 and the diagonal rod 32 all close to the bottom support frame 31. The entire child stroller frame structure is simple and flexible to fold, and only one hand is needed to operate when folding, making the folding operation very convenient and fast.

[0049] As shown in Figure 1 and Figure 5As shown, in this embodiment, the locking device includes a locking slot 71 provided at the upper end of the support rod 33, the hand push rod 34 is internally provided with a locking pin 72 which can slide therein and can be engaged with or disengaged from the locking slot 71, the upper end of the hand push rod 34 is provided with an operation switch 73, the operation switch 73 and the locking pin 72 are provided with a pull rope 74 which can pull the locking pin 72 to disengage from the locking slot 71, and the hand push rod 34 is further internally provided with a second reset spring 75 which can push the locking pin 72 to slide and reset. When unlocking, press the operation switch 73, and the operation switch 73 pulls the locking pin 72 to slide through the pull rope 74, and the locking pin 72 exits the locking slot 71 at the upper end of the support rod 33, at this time the hand push rod 34 can be rotated forward, and the user can realize one-handed unlocking and one-handed folding operation, which is very convenient and fast. Of course, the locking device can also use other locking structures in the traditional technology, which will not be described here.

[0050] As shown, Figures 1 to 4 the transmission rod 35 is hinged to the diagonal support rod 32 near the lower end thereof about the fifth axis E, the linkage 36 includes a linkage rod 361, one end of the linkage rod 361 is hinged to the lower end of the transmission rod 35 about the sixth axis F, and the other end is hinged to the middle of the bottom support frame 31 about the seventh axis G. When the child stroller framework is in the unfolded state, the linkage rod 361 plays a supporting role to ensure that the child stroller framework has sufficient load bearing strength, and when the child stroller framework is folded, the lower end of the transmission rod 35 pries the upper end of the linkage rod 361 to make the linkage rod 361 relatively rotate with respect to the transmission rod 35 and the bottom support frame 31 when the transmission rod 35 rotates with respect to the diagonal support rod 32, thereby driving the diagonal support rod 32 to rotate with respect to the bottom support frame 31 to close, so that the child stroller framework folding operation can be performed by one hand, and the child stroller framework folding is flexible.

[0051] As shown, Figure 1 and Figure 2 when the child stroller is in the unfolded position, the projections of the support rod 33, the upper part of the diagonal support rod 32, the transmission rod 35 and the lower part of the hand push rod 34 on the vertical plane form a triangle, and the projections of the lower part of the diagonal support rod 32, the lower part of the transmission rod 35, the linkage rod 361 and the rear part of the bottom support frame 31 on the vertical plane also form a triangle, therefore, the entire child stroller framework has high stability and strong load bearing capacity in the unfolded state.

[0052] As shown, Figures 1 to 4 the wheel 2 includes a front wheel 21 connected to the front side of the bottom support frame 31, and the wheel 2 further includes a rear wheel 22 connected to the lower end of the diagonal support rod 32, and the rear wheel 22 moves with the diagonal support rod 32 when the diagonal support rod 32 rotates with respect to the bottom support frame 31 to close. Of course, the rear wheel 22 can also be connected to the rear side of the bottom support frame 31, and the rear wheel 22 does not move with the diagonal support rod 32 when the diagonal support rod 32 rotates with respect to the bottom support frame 31 to close.

[0053] As shown in Figures 1 to 4 , the seat 1 comprises a seat frame rod 11, the rear side of which is hinged to the transmission rod 35 around the eighth axis H, and the front side of which is provided with a connecting rod 12 hinged to the seat frame rod 11 and the diagonal support rod 32. When the child stroller frame is folded, the transmission rod 35 pulls the rear side of the seat frame rod 11 and rotates relative to the diagonal support rod 32, and the connecting rod 12 rotates relative to the seat frame rod 11 and the diagonal support rod 32, so that the seat frame rod 11 can also follow the movement and approach the bottom support frame 31, realizing the linkage folding of the seat 1.

[0054] In order to ensure safety, in this embodiment, the child stroller frame further comprises a handrail assembly 4, which comprises a U-shaped handrail rod 41, the rear end of which is hinged to the transmission rod 35 around the ninth axis I, and the front side of which is provided with a hinged rod 42 hinged to the seat frame rod 11 and the handrail rod 41. When the child stroller frame is folded, the transmission rod 35 pulls the rear side of the handrail rod 41 and rotates relative to the diagonal support rod 32, and the hinged rod 42 rotates relative to the seat frame rod 11 and the handrail rod 42, so that the handrail assembly 4 can also follow the movement and approach the bottom support frame 31, realizing the linkage folding of the handrail assembly 4

[0055] As shown in Figure 1 , Figures 6 to 8 , the front end of the seat frame rod 11 is connected with a leg support plate 5 which can rotate relative to it, and the leg support plate 5 and the seat frame rod 11 are provided with an adjusting device for adjusting the inclination angle of the leg support plate 5. The leg support plate 5 is used to support the legs of a child, which can make the child ride comfortably, and when the leg support plate 5 is adjusted to be flush with the seat frame rod 11, it can also extend the length of the seat 1 in front and back, which can be used for a child to sleep in the child stroller. The adjusting device comprises a fixed seat 61 fixedly connected to the seat frame rod 11, a plurality of clamping grooves 62 are provided on the fixed seat 61 in the circumferential direction, a clamping block 63 is provided in the leg support plate 5 which can slide relative to it and can be clamped or separated from the clamping grooves 62, a handle 64 is provided on the leg support plate 5 which is connected with the clamping block 63 and can pull the clamping block 63 away from the clamping grooves 62, and a first reset spring 65 is further provided between the leg support plate 5 and the clamping block 63 which can push the clamping block 63 to slide and reset. When it is necessary to adjust the inclination angle of the leg support plate 5, the handle 64 is pulled, so that the clamping block 63 is separated from the clamping grooves 62, and then the leg support plate 5 is rotated, and when it is rotated to the appropriate position, the handle 64 is released, and the clamping block 63 is clamped into another clamping groove 62 under the action of the first reset spring 65.

[0056] As shown in Figure 4As shown, the diagonal brace 32 is provided with an elastic plate 81, the elastic plate 81 is provided with a locking hole 82, and the push rod 34 is provided with a locking post 83 that can engage with the locking hole 82 when the stroller frame is in the folded position, thereby ensuring that the stroller frame is maintained in the folded position and will not be accidentally unfolded.

[0057] Example 2:

[0058] like Figures 9 to 11 As shown, the difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 does not have the armrest assembly 4 in Embodiment 1. In Embodiment 2, the child can be restrained in the seat 1 by a flexible restraint strap (not shown in the figure).

[0059] Example 3:

[0060] like Figure 12 and Figure 13 As shown, the difference between Embodiment 3 and Embodiment 2 is that Embodiment 3 does not have the specific structure of the seat 1 in Embodiment 2. In Embodiment 3, the seat 1 can be a flexible seat 13 that can be attached to the frame 3, and the child can sit in the seat 13. The seat 13 can be made of fabric.

[0061] 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 that can move from an unfolded position to a folded position after the locking device is unlocked, comprising a frame (3) connected to a seat (1) and wheels (2), characterized in that: The frame (3) includes: Bottom support frame (31); The lower end of the diagonal brace (32) is hinged around the first axis (A) to the rear of the bottom support frame (31); The lower end of the support rod (33) is hinged to the upper end of the diagonal brace (32) around the second axis (B); A push rod (34) is hinged to the upper end of a support rod (33) about a third axis (C) near its lower end. The transmission rod (35) has its upper end hinged to the lower end of the push rod (34) around the fourth axis (D), and its lower part hinged to the diagonal brace (32) around the fifth axis (E). Linkage component (36), wherein the linkage component (36) is movably connected between the bottom support frame (31) and the transmission rod (35); Furthermore, when the stroller frame is moved from its unfolded position to its folded position, the upper end of the push rod (34) and the position where the support rod (33) connects with the diagonal brace (32) move to a position close to the front end of the bottom support frame (31), and the position where the transmission rod (35) connects with the push rod (34) moves to a position close to the rear end of the bottom support frame (31).

2. The stroller frame according to claim 1, characterized in that: The transmission rod (35) is hinged to the diagonal brace (32) around the fifth axis (E) near its lower end. The linkage (36) includes a linkage rod (361), one end of which is hinged to the lower end of the transmission rod (35) around the sixth axis (F), and the other end is hinged to the middle of the bottom support frame (31) around the seventh axis (G).

3. The stroller frame according to claim 1, characterized in that: The wheel (2) includes a front wheel (21) connected to the front side of the bottom support frame (31), and the wheel (2) also includes a rear wheel (22) connected to the rear side of the bottom support frame (31) or the lower end of the diagonal brace (32).

4. The stroller frame according to claim 1, characterized in that: The seat (1) includes a seat frame rod (11), the rear side of which is hinged to the transmission rod (35) around the eighth axis (H), and a connecting rod (12) is provided between the front side of the seat frame rod (11) and the diagonal brace (32) and is hinged to both.

5. The stroller frame according to claim 4, characterized in that: It also includes a handrail assembly (4), which includes a U-shaped handrail bar (41), the rear end of which is hinged to the transmission rod (35) around the ninth axis (I), and a hinge rod (42) is provided between the handrail bar (41) and the front side of the seat frame rod (11) for hinge connection.

6. The stroller frame according to claim 4, characterized in that: The front end of the seat frame rod (11) is connected to a leg support plate (5) that can rotate relative to it. An adjustment device for adjusting the tilt angle of the leg support plate (5) is provided between the leg support plate (5) and the seat frame rod (11). The adjustment device includes a fixed seat (61) fixedly connected to the seat frame rod (11). The fixed seat (61) is provided with multiple slots (62) along the circumferential direction. The leg support plate (5) is provided with a locking block (63) that can slide relative to it and can engage or disengage from the slot (62). The leg support plate (5) is provided with a handle (64) that is connected to the locking block (63) and can pull the locking block (63) to disengage from the slot (62). A first return spring (65) that can push the locking block (63) to slide back to its original position is also provided between the leg support plate (5) and the locking block (63).

7. The stroller frame according to claim 1, characterized in that: The locking device includes a locking groove (71) on the upper end of the support rod (33), a locking pin (72) that can slide inside the push rod (34) and engage or disengage from the locking groove (71), an operating switch (73) on the upper end of the push rod (34), a pull rope (74) that can pull the locking pin (72) away from the locking groove (71) between the operating switch (73) and the locking pin (72), and a second return spring (75) that can push the locking pin (72) to slide back to its original position inside the push rod (34).

8. The trolley frame according to claim 1, characterized in that: The diagonal brace (32) is provided with an elastic plate (81), the elastic plate (81) is provided with a locking hole (82), and the push rod (34) is provided with a locking post (83) that can engage with the locking hole (82) when the stroller frame is in the folded position.

9. The trolley frame according to claim 2, characterized in that: In the unfolded position, the projections of the support rod (33), the upper part of the diagonal brace (32), the transmission rod (35), and the lower part of the push rod (34) on the vertical plane form a triangle.

10. The trolley frame according to claim 2 or 9, characterized in that: In the unfolded position, the projections of the lower part of the diagonal brace (32), the lower part of the transmission rod (35), the linkage rod (361), and the rear part of the bottom support frame (31) on the vertical plane form a triangle.

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