Basket framework

Abstract

The basket framework comprises an upper frame body, a lower frame body and a traction assembly, the upper frame body comprises a first upper frame body and a second upper frame body which can be rotationally unfolded or folded relative to the first upper frame body, the lower frame body comprises a connecting base, and one end of the connecting base is rotationally connected with a first lower frame body around a ninth axis; the traction assembly comprises a first traction piece and a second traction piece, the first traction piece is movably connected among the first upper frame body, the first lower frame body and the connecting base, and the second traction piece is movably connected among the second upper frame body and the connecting base. The second traction piece is movably connected among the second upper frame body, the second lower frame body and the connecting seat, and when the first upper frame body and the second upper frame body rotate relatively to be closed or unfolded, the first traction piece and the second traction piece pull the first lower frame body and the second lower frame body to be closed or unfolded. The folding chair is simple in structure, convenient to fold, high in bearing capacity and small in size after being folded.

Description

TECHNICAL FIELD

[0001] The present application relates to a basket framework. BACKGROUND

[0002] Basket is a common product in daily life. For example, baby basket, pet basket, etc. The basket generally includes a basket framework and a cloth cover sleeved on the basket framework.

[0003] Chinese patent publication No. (CN221214076U) discloses a basket, the framework of which includes an upper support and a bottom support, the upper support is connected with a plurality of support rods capable of rotating and unfolding or folding relative to the upper support, and the bottom support is provided with a card hole capable of allowing the support rods to be clamped in when unfolded. However, the foregoing basket framework has the following disadvantages: first, the unfolded basket is supported by two U-shaped support rods, and the carrying capacity is low; in addition, when the basket needs to be folded, it is not convenient to operate to pry out the lower end of the support rod from the card hole with fingers; and the basket can only be folded in the up-down direction, and the volume after folding is still large.

[0004] Therefore, the present application is generated based on the above disadvantages. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a basket framework with simple structure, convenient folding, strong carrying capacity, and small volume after folding.

[0006] The present application is achieved by the following technical solutions:

[0007] A basket framework capable of being converted from an unfolded state to a folded state after the locking device is unlocked, comprising an upper frame, a lower frame, and a traction assembly, the upper frame comprises a first upper frame body and a second upper frame body capable of rotating and unfolding or folding relative to the first upper frame body, the lower frame comprises a connecting seat, one end of the connecting seat is rotatably connected with a first lower frame body around a ninth axis, the other end of the connecting seat is rotatably connected with a second lower frame body around a tenth axis, the traction assembly comprises a first traction member and a second traction member, the first traction member is movably connected between the first upper frame body, the first lower frame body, and the connecting seat, and the second traction member is movably connected between the second upper frame body, the second lower frame body, and the connecting seat, when the first upper frame body and the second upper frame body rotate relative to each other to close or unfold, the first traction member and the second traction member pull the first lower frame body and the second lower frame body to close or unfold.

[0008] The first traction component includes a first traction rod, the upper end of which is rotatably connected to the first upper frame about a first axis, and the lower end of which is rotatably connected to the middle of the connecting seat about a second axis. The first traction component also includes a second traction rod, the upper end of which is rotatably connected to the middle of the first traction rod about a third axis, and the lower end of which is rotatably connected to the first lower frame about a fourth axis.

[0009] The second traction component includes a third traction rod, the upper end of which is rotatably connected to the second upper frame about a fifth axis, and the lower end of which is rotatably connected to the middle of the connecting seat about a sixth axis. The second traction component also includes a fourth traction rod, the upper end of which is rotatably connected to the middle of the third traction rod about a seventh axis, and the lower end of which is rotatably connected to the second lower frame about an eighth axis.

[0010] The second axis and the sixth axis are collinear and coaxial.

[0011] A linkage rod is provided between the first lower frame and the second lower frame, with one end of the linkage rod rotatably connected to the first lower frame around the eleventh axis and offset from the ninth axis, and the other end of the linkage rod rotatably connected to the second lower frame around the twelfth axis and offset from the tenth axis.

[0012] The first upper frame includes a first upper frame rod and a first joint seat fixedly connected to the first upper frame rod. The second upper frame includes a second upper frame rod and a second joint seat fixedly connected to the second upper frame rod. The first joint seat and the second joint seat are rotatably connected around the thirteenth axis. The locking device is disposed between the first joint seat and the second joint seat. The first upper frame rod is provided with an unlocking component that can drive the locking device to unlock.

[0013] The locking device includes a locking notch on the outer circumferential surface of the second joint seat. A locking rod slidably disposed within the first joint seat, capable of engaging or disengaging from the locking notch, is also present. The unlocking component is connected to the locking rod and can pull the locking rod away from the locking notch. A first return spring is also provided within the first joint seat to drive the locking rod to slide back to its original position. A fixed seat is provided on the first upper frame rod. The unlocking component includes a handle rotatably connected to the fixed seat. A pull rope is provided between the handle and the locking rod, which, when the handle is rotated, can pull the locking rod away from the locking notch. The fixed seat... The handle has a protruding protrusion in the middle, and a rotating block is rotatably connected to the handle. The rotating block has a blocking block that can abut against the protrusion. The rotating block also has a clearance groove that can make way for the protrusion after it rotates. When the blocking block is opposite to the protrusion, the protrusion prevents the handle from rotating relative to the fixed seat. When the rotating block rotates to the point where the clearance groove is opposite to the protrusion, the handle can rotate relative to the fixed seat and pull the pull rope. A first torsion spring that can push the rotating block to reset is provided between the rotating block and the handle, and a second torsion spring that can push the handle to reset is provided between the handle and the fixed seat.

[0014] The connecting seat is also connected to a snap-fit ​​seat that can connect the basket frame to the stroller frame. The snap-fit ​​seat is rotatably connected to the connecting seat and a locking structure is provided between them. The locking structure includes multiple locking grooves on the connecting seat and the snap-fit ​​seat. A locking gear that can engage with the locking grooves on the connecting seat and the snap-fit ​​seat is slidably provided in the space enclosed by the connecting seat and the snap-fit ​​seat. Two pushers that can push the locking gears to disengage from the locking grooves on the connecting seat are slidably provided in the connecting seat. The first lower frame and the second lower frame are provided with push-pull inclined surfaces that can push the corresponding pushers to slide when they rotate and fold relative to the connecting seat. A third return spring that can push the locking gears to reset is provided between the snap-fit ​​seat and the locking gears.

[0015] The first joint seat is provided with a insertion groove, the second joint seat is inserted into the insertion groove and rotatably connected to the first joint seat, and the two sides of the second joint seat are in contact with the side wall of the insertion groove.

[0016] The upper frame is also rotatably connected to a handle, which includes a handle rod and a handle joint located at the lower end of the handle rod. The handle joint is rotatably connected to a first joint seat. A locking structure is provided between the handle joint and the first joint seat. The locking structure includes multiple first locking grooves on the first joint seat and multiple second locking grooves on the handle joint. A spline that can simultaneously engage with the first and second locking grooves is slidably provided between the handle joint and the first joint seat. A connecting part is provided on the first joint seat at a position offset from its thirteenth axis. A flexible cable that can pull the spline away from the second locking groove is provided between the connecting part and the spline. A second return spring that can push the spline to slide back to its original position is also provided between the spline and the first joint seat. A button that can push the spline away from the second locking groove is also provided on the handle joint when the upper frame is in the unfolded state.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The first and second upper frames of this invention can rotate relative to each other to unfold or fold. During unfolding or folding, the first and second lower frames can be pulled to rotate relative to the connecting seat via the first and second traction members, thereby causing the first and second lower frames to also unfold or fold, achieving linkage between the upper and lower frames. This ensures convenient folding of the basket frame, and the basket frame reduces in both height and length after folding, ensuring a small volume for easy carrying and storage. Furthermore, the first and second traction members not only provide linkage for the unfolding or folding movement but also provide support when the basket frame is unfolded, possessing sufficient support strength, resulting in a strong load-bearing capacity and a stable structure.

[0019] 2. The first lower frame and the second lower frame of the present invention are rotatably connected by a linkage rod. The connection position of the linkage rod to the first lower frame is offset from the connection position of the first lower frame and the connecting seat, and the connection position of the linkage rod to the second lower frame is also offset from the connection position of the second lower frame and the connecting seat. This makes the rotation of the first lower frame and the second lower frame relative to the connecting seat more synchronized, ensuring smooth folding or unfolding of the basket frame.

[0020] 3. The present invention has a simple structure, unfolds or folds smoothly and flexibly, and has a small volume after folding, making it suitable for widespread application. Attached Figure Description

[0021] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0022] Figure 2 yes Figure 1 A magnified view at point N;

[0023] Figure 3This is a side view of the unfolded state of Embodiment 1 of the present invention;

[0024] Figure 4 This is one of the side views during the folding process of Embodiment 1 of the present invention;

[0025] Figure 5 This is a perspective view of the folding process in Embodiment 1 of the present invention;

[0026] Figure 6 This is a second side view of the folding process in Embodiment 1 of the present invention;

[0027] Figure 7 This is a side view of the folded state of Embodiment 1 of the present invention;

[0028] Figure 8 This is a perspective view of Embodiment 2 of the present invention;

[0029] Figure 9 This is a side view during the folding process of Embodiment 2 of the present invention;

[0030] Figure 10 This is a side view of the folded state of Embodiment 2 of the present invention;

[0031] Figure 11 This is an exploded view of the components of Embodiment 1 of the present invention;

[0032] Figure 12 This is a perspective view of Embodiment 3 of the present invention;

[0033] Figure 13 This is one of the exploded views of the components in Embodiment 3 of the present invention;

[0034] Figure 14 This is a partial cross-sectional view of Embodiment 3 of the present invention;

[0035] Figure 15 This is the second exploded view of the components in Embodiment 3 of the present invention;

[0036] Figure 16 This is the third exploded view of the components in Embodiment 3 of the present invention;

[0037] Figure 17 This is the fourth exploded view of the components of Embodiment 3 of the present invention. Detailed Implementation

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

[0039] Example 1:

[0040] like Figures 1 to 7As shown, a basket frame can be converted from an unfolded state to a folded state after the locking device 5 is unlocked. After a cloth cover is put on the basket frame, it can be used as a baby basket, pet basket or other basket for holding items. The basket frame includes an upper frame 1, a lower frame 2, and a traction assembly 3. The upper frame 1 includes a first upper frame 11 and a second upper frame 12 that can rotate and unfold or fold relative to the first upper frame 11. The lower frame 2 includes a connecting seat 21. One end of the connecting seat 21 is rotatably connected to the first lower frame 22 around the ninth axis I, and the other end of the connecting seat 21 is rotatably connected to the second lower frame 23 around the tenth axis J. The traction assembly 3 includes a first traction member 31 and a second traction member 32. The first traction member 31 is movably connected between the first upper frame 11, the first lower frame 22, and the connecting seat 21. The second traction member 32 is movably connected between the second upper frame 12, the second lower frame 23, and the connecting seat 21. When the first upper frame 11 and the second upper frame 12 rotate relative to each other and move closer or unfold, the first traction member 31 and the second traction member 32 pull the first lower frame 22 and the second lower frame 23 closer or unfold. In the unfolded state, the upper frame 1 and lower frame 2 are relatively far apart, and the traction component 3 provides support. When folding is required, the locking device 5 is first unlocked, and then the first upper frame 11 and the second upper frame 12 are rotated relative to each other and brought closer together. At this time, the first traction component 31 pulls the first lower frame 22 to rotate relative to the connecting seat 21, and the second traction component 32 pulls the second lower frame 23 to rotate relative to the connecting seat 21, so that the first lower frame 22 and the second lower frame 23 also rotate relative to each other and bring closer together, thereby realizing the folding of the basket frame. The entire folding operation only requires the first upper frame 11 and the second upper frame 12 to come closer together to achieve the linkage folding of the lower frame 2. The folding operation is very convenient and quick, and the folded size is also very small, making it easy to carry or store. The locking device 5 can adopt a variety of different locking structures, and a specific locking structure will be introduced in the following sections of this article.

[0041] like Figures 1 to 7As shown, the first traction member 31 includes a first traction rod 311, the upper end of which is rotatably connected to the first upper frame 11 about a first axis A, and the lower end of which is rotatably connected to the middle of the connecting seat 21 about a second axis B. The first traction member 31 also includes a second traction rod 312, the upper end of which is rotatably connected to the middle of the first traction rod 311 about a third axis C, and the lower end of which is rotatably connected to the first lower frame 22 about a fourth axis D. The second traction member 32 includes a third traction rod 321, the upper end of which is rotatably connected to the second upper frame 12 about the fifth axis E, and the lower end of which is rotatably connected to the middle of the connecting seat 21 about the sixth axis F. The second traction member 32 also includes a fourth traction rod 322, the upper end of which is rotatably connected to the middle of the third traction rod 321 about the seventh axis G, and the lower end of which is rotatably connected to the second lower frame 23 about the eighth axis H. When the first upper frame 11 rotates relative to the second upper frame 12 and moves closer to each other, the first upper frame 11 pulls the upper end of the first traction rod 311 and rotates relative to it. The lower end of the first traction rod 311 rotates relative to the connecting seat 21, and the first traction rod 311 pulls the upper end of the second traction rod 312 and rotates relative to it. The lower end of the second traction rod 312 then pulls the first lower frame 22, causing the first lower frame 22 to rotate relative to the connecting seat 21. During this process, the second upper frame 12 pulls the upper end of the third traction rod 321 and rotates relative to it. The lower end of the third traction rod 321 rotates relative to the connecting seat 21. The rotation of the third traction rod 321 pulls the upper end of the fourth traction rod 322, causing it to rotate relative to the first lower frame 21. The lower end of the fourth traction rod 322 then pulls the second lower frame 23, causing it to rotate relative to the connecting seat 21. This brings the second lower frame 23 and the first lower frame 21 closer together, achieving the folding of the entire basket frame. The folding process is smooth and flexible. After folding, the first upper frame 11, second upper frame 12, first lower frame 22, second lower frame 23, first traction member 31, and second traction member 32 all come together, ensuring the basket frame is compact when folded, making it easy to carry or store. Furthermore, in the unfolded state, the upper frame 1 and lower frame 2 are supported by the first traction rod 311, second traction rod 312, third traction rod 321, and fourth traction rod 322, ensuring a robust basket frame structure and strong load-bearing capacity. In this embodiment, the second axis B and the sixth axis F are collinear and coaxial, ensuring the symmetry and stability of the traction action. In addition, a handle 6 is rotatably connected to the upper frame 1 for easy carrying.

[0042] like Figure 3 , Figure 5 and Figure 11As shown, the first upper frame 11 includes a first upper frame rod 111 and a first joint seat 112 fixedly connected to the first upper frame rod 111. The second upper frame 12 includes a second upper frame rod 121 and a second joint seat 122 fixedly connected to the second upper frame rod 121. The first joint seat 112 and the second joint seat 122 are rotatably connected around the thirteenth axis M. The aforementioned handle 6 is also rotatably connected to the first joint seat 112 around the thirteenth axis M. When folding the basket frame, the handle 6 is first rotated to a position close to the first upper frame 11 or the second upper frame 12. The first joint seat 112 is provided with an insertion groove 113. The second joint seat 122 is inserted into the insertion groove 113 and rotatably connected to the first joint seat 112. The two sides of the second joint seat 122 are in contact with the side walls of the insertion groove 113. When the first upper frame 11 and the second upper frame 12 rotate relative to each other, the two sides of the second joint seat 122 slide in surface contact with the side wall of the insertion groove 113, which plays a guiding role and makes the first upper frame 11 and the second upper frame 12 rotate relatively smoothly.

[0043] like Figure 1 , Figure 3 , Figure 6 and Figure 11 As shown, the locking device 5 is disposed between the first joint seat 112 and the second joint seat 122, and the first upper frame rod 111 is provided with an unlocking member 4 that can drive the locking device 5 to unlock. Specifically, the locking device 5 includes a locking notch 51 disposed on the outer peripheral surface of the second joint seat 122, and a locking rod 52 that can engage or disengage from the locking notch 51 is slidably disposed in the first joint seat 112. The unlocking member 4 is connected to the locking rod 52 and can pull the locking rod 52 to disengage from the locking notch 51. The first joint seat 112 is also provided with a first return spring 53 that drives the locking rod 52 to slide back to its original position. The unlocking member 4 includes a handle 41 that is connected to the first upper frame rod 111 and can rotate relative to the first upper frame rod 111. A pull rope 42 is provided between the handle 41 and the locking rod 52, which can pull the locking rod 52 to slide when the handle 41 is rotated. When unlocking is required, the handle 41 is turned, and the handle 41 pulls the pull rope 42 during the rotation. The pull rope 42 pulls the locking rod 52, causing the locking rod 52 to disengage from the locking notch 51 on the second joint seat 122. At this time, the locking device 5 is unlocked, and the first upper frame 11 and the second upper frame 12 can be rotated relative to each other to achieve the folding of the basket frame.

[0044] Example 2:

[0045] like Figures 8 to 10As shown, the difference between Embodiment 2 and Embodiment 1 is that a linkage rod 24 is added between the first lower frame 22 and the second lower frame 23, connecting them. One end of the linkage rod 24 is rotatably connected to the first lower frame 22 around the eleventh axis K and offset from the ninth axis I. The other end of the linkage rod 24 is rotatably connected to the second lower frame 23 around the twelfth axis L and offset from the tenth axis J. The linkage rod 24 allows the first lower frame 22 and the second lower frame 23 to rotate more synchronously relative to the connecting seat 21. After unlocking the locking device 5, only one of the first upper frame 11 or the second upper frame 12 needs to be rotated to fold or unfold the entire basket frame, making the folding or unfolding of the basket frame more convenient and smooth.

[0046] Example 3:

[0047] like Figures 11 to 16 As shown, the difference between Example 3 and Example 2 is that:

[0048] The first upper frame rod 111 is also provided with a fixed seat 114. The unlocking component 4 includes a handle 41 rotatably connected to the fixed seat 114. A pull rope 42 is provided between the handle 41 and the locking rod 52, which can pull the locking rod 52 out of the locking notch 51 when the handle 41 is rotated. The fixed seat 114 has a protruding protrusion 115 in the middle. A rotating block 43 is rotatably connected to the handle 41. The rotating block 43 has a blocking block 44 that can abut against the protrusion 115. The rotating block 43 also has a clearance groove 45 that can make way for the protrusion 115 after it rotates. When the blocking block 44 is opposite to the protrusion 115, the protrusion 115 prevents the handle 41 from rotating relative to the fixed seat 114. At this time, turning the handle 41 cannot unlock it. When the rotating block 43 is pressed and rotated, causing the recessed groove 45 to align with the protrusion 115, rotating the handle 41 will cause the protrusion 115 to enter the recessed groove 45. This allows the handle 41 to rotate relative to the fixed base 115, pulling the pull rope 42 and unlocking the locking device 5. Therefore, during the unlocking operation, the rotating block 43 must be pressed first, and the handle 41 must be rotated simultaneously. This design avoids accidental contact with the handle 41, preventing accidental locking and ensuring safety. In this embodiment, a first torsion spring 46 is provided between the rotating block 43 and the handle 41 to push the rotating block 43 back to its original position, and a second torsion spring 47 is provided between the handle 41 and the fixed base 114 to push the handle 41 back to its original position.

[0049] like Figure 11 As shown, the connecting seat 21 is also connected to a snap-fit ​​seat 25 that allows the basket frame to be attached to the stroller frame. The snap-fit ​​seat 25 allows the basket frame to be attached to the stroller frame, and the basket frame can be used as a bassinet. Figure 17As shown, the snap-fit ​​seat 25 and the connecting seat 21 are rotatably connected, and a locking structure 8 is provided between them. When the snap-fit ​​seat 25 is snapped into the stroller frame, the snap-fit ​​seat 25 is fixed relative to the stroller frame. When the stroller needs to be folded, the upper frame 1, the lower frame 2, and the traction component 3 are folded first, and then the connecting seat 21 is rotated relative to the snap-fit ​​seat 25, so that the folded basket frame can be brought closer to the stroller frame. This design allows the stroller to be folded as a whole without disassembling the basket frame. The locking structure 8 includes multiple locking grooves 81 provided on the connecting seat 21 and the snap-fit ​​seat 25. A locking gear 82 is slidably provided in the space enclosed by the connecting seat 21 and the snap-fit ​​seat 25, which can simultaneously engage with the locking grooves 81 on the connecting seat 21 and the snap-fit ​​seat 25. Two pushers 83 are slidably provided in the connecting seat 21, which can push the locking gear 82 to disengage from the locking grooves 81 on the connecting seat 21. The first lower frame 22 and the second lower frame 23 are provided with pusher slopes 84 that can push the corresponding pushers 83 to slide when they rotate and fold relative to the connecting seat 21. A third return spring 85 is provided between the snap-fit ​​seat 25 and the locking gear 82, which can push the locking gear 82 to return to its original position. The specific folding operation is as follows: the locking device 5 is unlocked by the unlocking component 4, the first upper frame 11 is rotated relative to the second upper frame 12, and the first lower frame 22 is pulled to rotate relative to the connecting seat 21 by the first traction component 31. During this process, the second lower frame 23 is pulled to rotate relative to the connecting seat 21 by the linkage rod 24, and the first upper frame 12 and the first upper frame 11 are rotated to move closer together by the second traction component 32. When the first lower frame 22 and the second lower frame 23 rotate relative to the connecting seat 21, the pushing inclined surface 84 on both pushes the pushing push 83 to slide, and the pushing push 83 pushes the locking gear 82 to disengage from the locking groove 81 on the connecting seat 21. At this time, the locking structure 8 is unlocked, the connecting seat 21 can rotate relative to the locking seat 25, and the folded basket frame can rotate to move closer to the folding position on the stroller frame, so as to realize the overall folding of the stroller without disassembling the basket frame. The structure of the stroller frame can be a traditional frame, such as unlocking and folding the stroller frame after the basket frame is folded, or unlocking and folding the stroller frame during the folding process of the basket frame.

[0050] like Figure 15 and Figure 16As shown, the handle 6 includes a handle rod 61 and a handle joint 62 located at the lower end of the handle rod 61. The handle joint 62 is rotatably connected to a first joint seat 112. A locking structure 7 is provided between the handle joint 62 and the first joint seat 112. The locking structure 7 includes multiple first locking grooves 71 on the first joint seat 112 and multiple second locking grooves 72 on the handle joint 62. The handle joint 62 and the first joint seat 112 are slidably connected to engage with the first locking grooves 71 and the second locking grooves. The spline 73 engages simultaneously with the first joint seat 112, which is located offset from its thirteenth axis M by a connecting part 116. A flexible cable 74 is provided between the connecting part 116 and the spline 73, capable of pulling the spline 73 away from the second locking groove 72. A second return spring 75 is also provided between the spline 73 and the first joint seat 112, capable of pushing the spline 73 to slide back to its original position. The handle joint 62 is also provided with a button 76 that can push the spline 73 away from the second locking groove 72 when the upper frame 1 is in the unfolded state. When the basket frame is in the unfolded state, if the handle 6 is to be folded, the button 76 is pressed, which pushes the spline 73 away from the second locking groove 72, allowing the handle 6 to be rotated and folded onto the upper frame 1. When the basket frame needs to be folded as a whole, the locking device 5 is unlocked by unlocking component 4, and then the first upper frame rod 111 is rotated. The first joint seat 112 rotates relative to the second joint seat 122. The first joint seat 112 then pulls the spline 73 out of the second locking groove 72 through the flexible cable 74, thereby unlocking the locking structure 7. During the folding process of the first upper frame rod 111 continuing to rotate, the first upper frame rod 111 will push the handle 6 to rotate and fold. Therefore, when the basket frame is folded as a whole, only the first upper frame rod 111 needs to be rotated to unlock the locking structure 7, making the folding operation of the entire basket frame convenient and quick.

[0051] 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 basket frame that can be converted from an unfolded state to a folded state after the locking device (5) is unlocked, characterized in that: The system includes an upper frame (1), a lower frame (2), and a traction assembly (3). The upper frame (1) includes a first upper frame (11) and a second upper frame (12) that can rotate and unfold or fold relative to the first upper frame (11). The lower frame (2) includes a connecting seat (21). One end of the connecting seat (21) is rotatably connected to the first lower frame (22) around the ninth axis (I), and the other end of the connecting seat (21) is rotatably connected to the second lower frame (23) around the tenth axis (J). The traction assembly (3) includes a first traction member (31). The first traction member (31) is movably connected between the first upper frame (11), the first lower frame (22) and the connecting seat (21), and the second traction member (32) is movably connected between the second upper frame (12), the second lower frame (23) and the connecting seat (21). When the first upper frame (11) and the second upper frame (12) rotate relative to each other and move closer or unfold, the first traction member (31) and the second traction member (32) pull the first lower frame (22) and the second lower frame (23) to move closer or unfold.

2. The basket frame according to claim 1, characterized in that: The first traction member (31) includes a first traction rod (311), the upper end of which is rotatably connected to the first upper frame (11) around the first axis (A), and the lower end of which is rotatably connected to the middle of the connecting seat (21) around the second axis (B). The first traction member (31) also includes a second traction rod (312), the upper end of which is rotatably connected to the middle of the first traction rod (311) around the third axis (C), and the lower end of which is rotatably connected to the first lower frame (22) around the fourth axis (D).

3. The basket frame according to claim 2, characterized in that: The second traction member (32) includes a third traction rod (321), the upper end of which is rotatably connected to the second upper frame (12) around the fifth axis (E), and the lower end of which is rotatably connected to the middle of the connecting seat (21) around the sixth axis (F). The second traction member (32) also includes a fourth traction rod (322), the upper end of which is rotatably connected to the middle of the third traction rod (321) around the seventh axis (G), and the lower end of which is rotatably connected to the second lower frame (23) around the eighth axis (H).

4. The basket frame according to claim 3, characterized in that: The second axis (B) and the sixth axis (F) are collinear and coaxial.

5. The basket frame according to any one of claims 1 to 4, characterized in that: A linkage rod (24) is provided between the first lower frame (22) and the second lower frame (23) to connect the two. One end of the linkage rod (24) is rotatably connected to the first lower frame (22) around the eleventh axis (K) and is offset from the ninth axis (I). The other end of the linkage rod (24) is rotatably connected to the second lower frame (23) around the twelfth axis (L) and is offset from the tenth axis (J).

6. The basket frame according to claim 5, characterized in that: The first upper frame (11) includes a first upper frame rod (111) and a first joint seat (112) fixedly connected to the first upper frame rod (111). The second upper frame (12) includes a second upper frame rod (121) and a second joint seat (122) fixedly connected to the second upper frame rod (121). The first joint seat (112) and the second joint seat (122) are rotatably connected around the thirteenth axis (M). The locking device (5) is disposed between the first joint seat (112) and the second joint seat (122). The first upper frame rod (111) is provided with an unlocking component (4) that can drive the locking device (5) to unlock.

7. The basket frame according to claim 6, characterized in that: The locking device (5) includes a locking notch (51) on the outer circumferential surface of the second joint seat (122). A locking rod (52) that can engage or disengage from the locking notch (51) is slidably provided in the first joint seat (112). The unlocking component (4) is connected to the locking rod (52) and can pull the locking rod (52) away from the locking notch (51). The first joint seat (112) is also provided with a first return spring (53) that drives the locking rod (52) to slide back to its original position. A fixed seat (114) is provided on the first upper frame rod (111). The unlocking component (4) includes a handle (41) rotatably connected to the fixed seat (114). A pull rope (42) is provided between the handle (41) and the locking rod (52) that can pull the locking rod (52) away from the locking notch (51) when the handle (41) is rotated. A protruding part is provided in the middle of the fixed seat (114). The handle (41) is rotatably connected to a rotating block (43). The rotating block (43) is provided with a blocking block (44) that can abut against the protrusion (115). The rotating block (43) is also provided with a relief groove (45) that can make way for the protrusion (115) after it rotates. When the blocking block (44) is opposite to the protrusion (115), the protrusion (115) prevents the handle (41) from rotating relative to the fixed seat (114). When the rotating block (43) rotates to the point where the relief groove (45) is opposite to the protrusion (115), the handle (41) can rotate relative to the fixed seat (115) and pull the pull rope (42). A first torsion spring (46) that can push the rotating block (43) to reset is provided between the rotating block (43) and the handle (41). A second torsion spring (47) that can push the handle (41) to reset is provided between the handle (41) and the fixed seat (114).

8. The basket frame according to claim 6, characterized in that: The connecting seat (21) is also connected to a snap-fit ​​seat (25) that can connect the basket frame to the stroller frame. The snap-fit ​​seat (25) is rotatably connected to the connecting seat (21) and a locking structure (8) is provided between them. The locking structure (8) includes multiple locking grooves (81) provided on the connecting seat (21) and the snap-fit ​​seat (25). A lock that can simultaneously engage with the locking grooves (81) on the connecting seat (21) and the snap-fit ​​seat (25) is slidably provided in the space enclosed by the connecting seat (21) and the snap-fit ​​seat (25). The engaging gear (82) is provided with two pushers (83) that can push the engaging gear (82) to disengage from the locking groove (81) on the connecting seat (21). The first lower frame (22) and the second lower frame (23) are provided with pusher slopes (84) that can push the corresponding pushers (83) to slide when they rotate and fold relative to the connecting seat (21). The snap-fit ​​seat (25) and the engaging gear (82) are provided with a third return spring (85) that can push the engaging gear (82) to reset.

9. The basket frame according to claim 6, characterized in that: The first joint seat (112) is provided with a insertion groove (113), the second joint seat (122) is inserted into the insertion groove (113) and rotatably connected to the first joint seat (112), and the two sides of the second joint seat (122) are in contact with the side wall of the insertion groove (113).

10. The basket frame according to claim 6, characterized in that: The upper frame (1) is also rotatably connected to a handle (6). The handle (6) includes a handle rod (61) and a handle joint (62) located at the lower end of the handle rod (61). The handle joint (62) is rotatably connected to a first joint seat (112). A locking structure (7) is provided between the handle joint (62) and the first joint seat (112). The locking structure (7) includes multiple first locking grooves (71) on the first joint seat (112). Multiple second locking grooves (72) are provided on the handle joint (62). The handle joint (62) and the first joint seat (112) are slidably connected to the first locking grooves (71). The spline (73) engages with the second locking groove (72) simultaneously. A connecting part (116) is provided on the first joint seat (112) at a position offset from its thirteenth axis (M). A flexible cable (74) is provided between the connecting part (116) and the spline (73) to pull the spline (73) away from the second locking groove (72). A second return spring (75) is also provided between the spline (73) and the first joint seat (112) to push the spline (73) to slide back to its original position. A button (76) is also provided on the handle joint (62) to push the spline (73) away from the second locking groove (72) when the upper frame (1) is in the unfolded state.

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