Trolley

Abstract

The utility model discloses a cart which comprises a foldable cart frame (7), a locking assembly (8) used for locking the cart frame (7) in an unfolded state is arranged on the cart frame (7), a basket framework (10) capable of being unfolded or folded is further detachably connected to the cart frame (7), and a connecting part (78) is fixedly arranged on the cart frame (7). The basket framework (10) is detachably connected with the connecting part (78) through a clamping seat (13) arranged on the basket framework (10), an unlocking part (14) is arranged on the basket framework (10), and in the process that the basket framework (10) moves from an unfolded state to a folded state, the unlocking part (14) drives the locking assembly (8) to be unlocked so that the frame (7) can be folded. The folding chair is convenient to fold and operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cart. BACKGROUND

[0002] The cart is a common product in the growth process of infants and young children, generally comprising a foldable frame, and a basket detachably connected to the frame. The basket is also a common baby product. For infants under six months old, the basket is generally used for care. After the infant is placed in the basket, the basket can be installed on the frame of the cart for travel, or directly carried for travel. However, the traditional cart with a basket is relatively troublesome to fold. The basket needs to be unlocked and folded first, and then the locking assembly of the frame is unlocked. Therefore, the two locking mechanisms of the basket and the frame are unlocked separately, making the folding operation of the cart inconvenient.

[0003] Therefore, the utility model is just based on the above deficiencies. SUMMARY

[0004] The utility model discloses a cart which overcomes the defects of the prior art and is convenient to fold.

[0005] The utility model discloses the following technical scheme:

[0006] A cart comprises a foldable frame, a locking assembly for locking the frame in an unfolded state, and a basket frame which is detachably connected to the frame and can be unfolded or folded. The frame is provided with a connecting portion, the basket frame is detachably connected to the connecting portion through a clamping seat provided thereon, and the basket frame is provided with an unlocking portion. During movement of the basket frame from the unfolded state to the folded state, the unlocking portion drives the locking assembly to be unlocked so that the frame can be folded.

[0007] The basket frame comprises a first support rod, a second support rod which is slidably connected to the first support rod, a second connecting seat provided at the upper end of the second support rod, a first support frame and a second support frame which are rotatably connected to the two sides of the second connecting seat, a clamping seat provided on the first support rod, and an unlocking portion provided on the second support rod. During movement of the basket frame from the unfolded state to the folded state, the first support frame and the second support frame are folded and moved towards each other relative to the second connecting seat, and the second support rod is slidably retracted relative to the first support rod so that the unlocking portion drives the locking assembly to be unlocked.

[0008] The lower end of the first supporting rod is provided with a first connecting seat, and the first connecting seat is rotatably connected with a first supporting frame and a second supporting frame on both sides.

[0009] The first supporting frame and the first supporting rod are provided with a first linkage member movably connected with both of them, and the second supporting frame and the second supporting rod are provided with a second linkage member movably connected with both of them.

[0010] A handle is connected to the first supporting frame or the second connecting seat, and the handle comprises a fixed seat fixed to the first supporting frame or the second connecting seat, a U-shaped rod body, and a rod body sleeve slidably connected with the rod body.

[0011] The locking device of the basket framework comprises a first locking assembly arranged between the first supporting frame and the second connecting seat, the first supporting frame is provided with a first unlocking assembly for unlocking the first locking assembly, the second supporting frame and the second connecting seat are provided with a second locking assembly, the first supporting frame and the second locking assembly are provided with a second unlocking assembly capable of driving the second locking assembly to be unlocked when the first supporting frame is folded relative to the second connecting seat, the second supporting rod and the first supporting rod are provided with a third locking assembly for locking both of them, and the second connecting seat is provided with a third unlocking assembly capable of being driven by the second unlocking assembly to unlock the third locking assembly when the second unlocking assembly unlocks the second locking assembly.

[0012] The first locking assembly comprises a first locking hole arranged on the second connecting base, the first supporting frame is internally arranged with a first locking rod capable of sliding relative to the first supporting frame to be engaged with or disengaged from the first locking hole, the first locking rod and the first supporting frame are further arranged with a third reset spring capable of pushing the first locking rod to slide and reset, the first unlocking assembly comprises an unlocking base fixed on the first supporting frame, the unlocking base is rotatably connected with an operating block, the operating block and the first locking rod are arranged with a first pull rope capable of pulling the first locking rod to disengage from the first locking hole when the operating block rotates, the operating block and the unlocking base form a space therebetween, the operating block is internally arranged with a pressing block capable of sliding in the operating block to be engaged in or disengaged from the space, when the pressing block is in the space, the pressing block prevents the operating block from rotating relative to the unlocking base, when the pressing block is disengaged from the space, the pressing block leaves a position for the rotating action of the operating block, the operating block is arranged with a button capable of pushing the pressing block to disengage from the space, the pressing block and the operating block are arranged with a fourth reset spring capable of pushing the pressing block to reset.

[0013] The second locking assembly comprises a second locking hole arranged on the second connecting base, the second supporting frame is internally arranged with a second locking rod capable of sliding relative to the second supporting frame to be engaged with or disengaged from the second locking hole, the second locking rod and the second supporting frame are arranged with a fifth reset spring capable of pushing the second locking rod to slide and reset, the second connecting base is arranged with a sliding groove communicated with the second locking hole, the second unlocking assembly comprises a pushing rod capable of sliding in the sliding groove and capable of pushing the second locking rod out of the second locking hole when sliding, the first supporting frame is arranged with a driving wall capable of pushing the pushing rod to slide when the first supporting frame rotates relative to the second connecting base to be folded, the pushing rod and the second connecting base are arranged with a sixth reset spring capable of pushing the pushing rod to slide and reset.

[0014] The third locking assembly comprises a third locking hole arranged on the side wall of the first supporting rod, the second supporting rod comprises a sliding rod capable of sliding in the first supporting rod and a third connecting base fixed in the sliding rod, the third connecting base is internally arranged with a locking block capable of moving transversely in the third connecting base and capable of passing out of the side wall of the second supporting rod to be engaged with or disengaged from the third locking hole, the third connecting base is further arranged with a seventh reset spring capable of pushing the locking block to slide and reset, the third unlocking assembly comprises a sliding base capable of sliding up and down in the third connecting base and capable of driving the locking block to disengage from the third locking hole when sliding upwards, the third unlocking assembly further comprises a moving block arranged in the second connecting base and capable of being driven by the pushing rod to move upwards when the pushing rod pushes the second locking rod, the moving block and the sliding base are arranged with a second pull rope connecting the two, the third connecting base and the sliding base are further arranged with an eighth reset spring capable of pushing the sliding base to slide and reset.

[0015] The frame comprises rear legs, the lower end of the rear legs is provided with rear wheels a, the upper end of the rear legs is provided with a rear leg seat, the rear leg seat is rotatably connected with a first connecting plate, the first connecting plate is fixedly connected with front legs, the lower end of the front legs is provided with front wheels b, the rear leg seat is also rotatably connected with a second connecting plate, the second connecting plate is fixedly connected with a push rod assembly, a linkage plate is arranged between the first connecting plate and the second connecting plate, the linkage plate is hinged to the first connecting plate and the second connecting plate and can drive the first connecting plate and the front legs to rotate and fold relative to the rear legs when the second connecting plate and the push rod assembly rotate and fold relative to the rear leg seat, the connecting part is arranged on the rear leg seat, the locking assembly comprises a locking part arranged on the second connecting plate, the rear leg seat is provided with a clamping block capable of sliding relative to the rear leg seat and being clamped or separated from the locking part, the clamping block and the rear leg seat are provided with a ninth reset spring capable of sliding and resetting the clamping block, and the clamping block is provided with a protruding block exposed to the rear leg seat and capable of being pushed by the unlocking part when the basket framework is folded.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] 1、The cart only needs to fold the basket framework first when folding, the basket framework drives the locking assembly of the frame to be unlocked through the unlocking part thereon in the folding process, the frame can be folded after the locking assembly is unlocked, thereby completing the folding operation of the whole cart.

[0018] 2、The basket framework of the utility model is folded, the first support frame and the second support frame rotate downward relative to the second connecting seat and approach each other, the second support rod slides downward relative to the first support rod to make the second support rod and the first support rod shrink relative to each other, the first support frame and the second support frame rotate downward relative to the first connecting seat to approach each other, and finally realize the overall folding of the basket framework, so that the volume of the folded basket framework is small, and the basket framework is convenient to store or carry, and the whole basket framework structure is very simple, and the basket can be used after the cloth cover is connected on the basket framework, and the baby is placed in the space surrounded by the cloth cover.

[0019] 3、The first linkage part movably connected between the first support frame and the first support bracket and the second linkage part movably connected between the second support frame and the second support bracket can exert force on the first support bracket and the second support bracket in the unfolded state of the basket framework, so as to enhance the bearing capacity of the first support bracket and the second support bracket, and make the basket framework more firm and reliable in the unfolded state.

DRAWINGS

[0020] Figure 1 This is a three-dimensional view of the basket frame of this utility model;

[0021] Figure 2 This is a side view of the basket frame of this utility model during the folding process;

[0022] Figure 3 This is one of the exploded views of the components of the basket frame of this utility model;

[0023] Figure 4 This is the second exploded view of the components of the basket frame of this utility model;

[0024] Figure 5 This is the third exploded view of the components of the basket frame of this utility model;

[0025] Figure 6 This is a cross-sectional view of the basket frame of this utility model;

[0026] Figure 7 yes Figure 6 Enlarged view at point A in the middle;

[0027] Figure 8 This is the fourth exploded view of the components of the basket frame of this utility model;

[0028] Figure 9 This is the fifth exploded view of the components of the basket frame of this utility model;

[0029] Figure 10 This is the sixth exploded view of the components of the basket frame of this utility model;

[0030] Figure 11 This is a cross-sectional view of the components of the basket frame of this utility model;

[0031] Figure 12 This is a perspective view of the trolley of this utility model;

[0032] Figure 13 This is a perspective view of the components of the trolley of this utility model;

[0033] Figure 14 This is an exploded view of the components of the trolley of this utility model;

[0034] Figure 15 This is one of the side views of the trolley during the folding process of this utility model;

[0035] Figure 16 This is the second side view of the folding process of the trolley of this utility model;

[0036] Figure 17 This is the third side view of the folding process of the trolley of this utility model.

Detailed Implementation Methods

[0037] The present invention will be further described below with reference to the accompanying drawings:

[0038] like Figure 1 , Figures 12 to 17 As shown, a stroller includes a foldable frame 7. The frame 7 has a locking assembly 8 for locking it in an unfolded state. A basket frame 10, capable of unfolding or folding, is detachably connected to the frame 7. A connecting part 78 is fixedly provided on the frame 7. The basket frame 10 is detachably connected to the connecting part 78 via a snap-fit ​​seat 13. The basket frame 10 has an unlocking part 14. During the movement of the basket frame 10 from the unfolded state to the folded state, the unlocking part 14 drives the locking assembly 8 to unlock, allowing the frame 7 to fold. When the stroller needs to be folded, simply fold the basket frame 10 first. During the folding process, the basket frame 10 unlocks the locking assembly 8 of the frame 7 via the unlocking part 14. Once the locking assembly 8 is unlocked, the frame 7 can be folded, thus completing the folding operation of the stroller. Therefore, the unlocking of the frame 7 and the folding action of the carrier frame 10 are linked. The folding action of the carrier frame 10 directly drives the unlocking of the frame 7, eliminating the need for the user to separately operate the locking component 8 of the frame 7, thus making the stroller folding operation more convenient and quick. In this embodiment, a cloth cover is attached to the carrier frame 10 during actual use, and the baby is placed inside the cloth cover. Moreover, the carrier frame 10 can be detached from the frame 7, allowing the user to carry the baby by the carrier, for example, in places where it is inconvenient to bring a stroller, such as in a park or on a grassy area, where the baby can be cared for using the carrier.

[0039] like Figure 1 , Figure 2 , Figure 6 and Figure 12As shown, the basket frame 10 includes a first support rod 11, to which a second support rod 12 is connected and can slide up and down relative to it. The upper end of the second support rod 12 is provided with a second connecting seat 22. A first support frame 31 and a second support frame 32 are rotatably connected to both sides of the second connecting seat 22. The lower end of the first support rod 11 is provided with a first connecting seat 21, to which a first support frame 41 and a second support frame 42 are rotatably connected to both sides. A snap-fit ​​seat 13 is provided on the first support rod 11, and an unlocking part 14 is provided on the second support rod 12. During the process of the basket frame 10 moving from an unfolded state to a folded state, the first support frame 31 and the second support frame 32 rotate and fold relative to the second connecting seat 22, bringing them closer together. The first support frame 41 and the second support frame 42 rotate relative to the first connecting seat 21, bringing them closer together. Furthermore, the second support rod 12 slides and retracts relative to the first support rod 11, causing the unlocking part 14 to drive the locking assembly 8 to unlock. When folded, the first support frame 31 and the second support frame 32 rotate downward relative to the second connecting seat 22 and move closer to each other. The first support frame 41 and the second support frame 42 rotate downward relative to the first connecting seat 21 and move closer to each other. The second support rod 12 slides downward relative to the first support rod 11, causing the second support rod 12 and the first support rod 11 to retract relative to each other. During the retraction process, the unlocking part 14 drives the locking assembly 8 of the frame 7 to unlock, ultimately realizing that the carrier frame 10 unlocks the frame 7 in conjunction with the folding process. This makes the stroller's unlocking and folding operation simple, and the carrier frame is small in size after folding, making it easy to store or carry. In actual use, a cloth cover is connected to the carrier frame 10. The upper end of the cloth cover is connected to the first support frame 31 and the second support frame 32, and the lower end of the cloth cover is connected to the first support frame 41 and the second support frame 42. Therefore, in the unfolded state, the baby is placed in the space enclosed by the cloth cover, with the bottom supported by the first support frame 41 and the second support frame 42. The upper end of the flexible fabric cover is connected to the first support frame 31 and the second support frame 32, which can apply an upward pulling force to the first support frame 41 and the second support frame 42, thereby enabling the first support frame 41 and the second support frame 42 of the carrier to have supporting capacity. Of course, this carrier frame structure can be used not only for infant carrier frames but also for pet carrier frames.

[0040] like Figure 1 , Figure 2 and Figures 12 to 15As shown, a first linkage member 51 is provided between the first support frame 31 and the first support frame 41, and a second linkage member 52 is provided between the second support frame 32 and the second support frame 42, both of which are movably connected. When the basket is unfolded, the first linkage member 51 and the second linkage member 52 can apply an upward force to the first support frame 41 and the second support frame 42, ensuring that the first support frame 41 and the second support frame 42 are not solely pulled by the fabric cover, thus enhancing their load-bearing capacity and making the basket frame more robust and reliable in the unfolded state. Furthermore, when the basket is folded, the first linkage member 51 can move relative to the first support frame 31 and the first support frame 41, and the second linkage member 52 can move relative to the second support frame 32 and the second support frame 42, achieving coordinated folding and making the entire basket frame folding convenient and quick.

[0041] like Figure 1 , Figure 2 and Figures 12 to 15 As shown, the first linkage 51 includes a U-shaped first linkage rod 511, the upper end of which is hinged to the first support frame 31, and the lower end of which is hinged to the first support frame 41. The second linkage 52 includes a U-shaped second linkage rod 521, the upper end of which is hinged to the second support frame 32, and the lower end of which is hinged to the second support frame 42. When the basket frame is folded, the second support rod 12 slides downward and retracts relative to the first support rod 11, the first linkage rod 511 rotates relative to the first support frame 31 and the first support frame 41, and the second linkage rod 521 rotates relative to the second support frame 32 and the second support frame 42. The first linkage rod 511 and the second linkage rod 521 can come closer to each other, which makes the folding operation of the basket frame convenient and the folded size small.

[0042] like Figure 1 and Figure 3As shown, a handle 33 is connected to the first support frame 31 or the second connecting seat 22, allowing the user to easily carry the basket. The handle 33 includes a fixed seat 331 fixed to the first support frame 31 or the second connecting seat 22, a U-shaped rod 332, and a rod sleeve 333 slidably connected to the rod 332. The rod sleeve 333 is rotatably connected to the fixed seat 331. A locking assembly is provided between the rod sleeve 333 and the fixed seat 331 to lock them together. The locking assembly includes a locking groove 341 arranged circumferentially on the fixed seat 331 and the rod sleeve 333. Within the space enclosed by the fixed seat 331 and the rod sleeve 333, a locking element 342 is provided that can move laterally and simultaneously engage with the locking groove 341 on the fixed seat 331 and the rod sleeve 333. A radially sliding connection is provided between the locking element 342 and the rod sleeve 333. Furthermore, during sliding, a sliding block 343 is provided that can push the engaging member 342 to disengage from the engaging groove 341 on the rod sleeve 333. The rod 332 is provided with a pusher block 344 that can push the sliding block 343 to slide when it slides relative to the rod sleeve 333. The sliding block 343 is provided with a first inclined surface 345. The rod sleeve 333 is provided with a second inclined surface 346 that cooperates with the first inclined surface 345 and can push the first inclined surface 345 to move the engaging member 342 laterally when the sliding block 343 slides. A first return spring 347 that can push the engaging member 342 to return to its lateral position is provided between the engaging member 342 and the fixed seat 331. A second return spring 348 that can push the rod 332 to return to its sliding position is provided between the pusher block 344 and the rod sleeve 333. When the basket frame needs to be folded, push the rod 332 downward, and the push block 344 will push the sliding block 343. When the sliding block 343 slides, the cooperation of the first inclined surface 345 and the second inclined surface 346 will cause the sliding block 343 to push the locking piece 342 out of the locking groove 341 on the rod sleeve 333. At this time, the rod 332 and the rod sleeve 333 can be rotated to fold the handle 33.

[0043] like Figures 4 to 11As shown, the locking device of the basket frame 10 includes a first locking assembly 61 disposed between the first support frame 31 and the second connecting seat 22. The first support frame 31 is provided with a first unlocking assembly 62 for unlocking the first locking assembly 61. The second support frame 32 and the second connecting seat 22 are provided with a second locking assembly 63. The first support frame 31 and the second locking assembly 63 are provided with a second unlocking assembly 64 that can drive the second locking assembly 63 to unlock when the first support frame 31 rotates and folds relative to the second connecting seat 22. The second support rod 12 and the first support rod 11 are provided with a third locking assembly 65 for locking the two. The second connecting seat 22 is provided with a third unlocking assembly 66 that can be driven by the second unlocking assembly 64 to unlock the third locking assembly 65 when the second unlocking assembly 64 unlocks the second locking assembly 63. In this embodiment, the first unlocking component 62 is used to unlock the first locking component 61. After the first locking component 61 is unlocked and the first support frame 31 rotates and folds relative to the second connecting seat 22, the second unlocking component 64 drives the third locking component 63 to unlock, allowing the second support frame 32 to rotate and fold relative to the second connecting seat 22. Furthermore, when the second unlocking component 64 drives the third locking component 63 to unlock, the third unlocking component 66 is driven by the second unlocking component 64 and drives the third locking component 65 to unlock, allowing the second support rod 12 to slide and retract relative to the first support rod 11. Therefore, the unlocking operation of the entire basket frame's locking device is linked, making the folding operation of the basket frame very convenient.

[0044] like Figures 4 to 10As shown, the first locking assembly 61 includes a first locking hole (not shown) on the second connecting seat 22. The first support frame 31 has a first locking rod 611 that can slide relative to it and engage or disengage from the first locking hole. A third return spring 612 is also provided between the first locking rod 611 and the first support frame 31 to push the first locking rod 611 to slide back to its original position. The first unlocking assembly 62 includes an unlocking seat 621 fixed on the first support frame 31. An operating block 622 is rotatably connected to the unlocking seat 621. An operation block 622 is provided between the operation block 622 and the first locking rod 611, which can pull the first locking rod 611 away from the first locking hole when the operation block 622 rotates. The first pull cord 623, the operation block 622 and the unlocking seat 621 form a gap 624, the operation block 622 is provided with a pressing block 625 that can slide in and get into or out of the gap 624. When the pressing block 625 is in the gap 624, the pressing block 625 prevents the operation block 622 from rotating relative to the unlocking seat 621. When the pressing block 625 is out of the gap 624, the pressing block 625 makes way for the rotation of the operation block 622. The operation block 622 is provided with a button 626 that can push the pressing block 625 out of the gap 624. A fourth return spring 627 that can push the pressing block 625 to reset is provided between the pressing block 625 and the operation block 622. When the basket frame 10 is in the unfolded state, the first locking lever 611 is inserted into the first locking hole. When the basket frame needs to be folded, the button 626 is pressed first. The button 626 pushes the pressing block 625 out of the gap 624 between the unlocking seat 621 and the operating block 622. Once the pressing block 625 is out of the gap 624, the operating block 622 can rotate relative to the unlocking seat 621. During the rotation, the first pulling rope 623 pulls the first locking lever 611 out of the first locking hole. At this time, the first locking assembly 61 is unlocked, and the first support frame 31 can rotate and fold relative to the second connecting seat 22. The setting of the pressing block 625 and the gap 624 serves as a double lock, which can prevent accidental locking caused by the operation block 622 being accidentally activated. Therefore, the operation block 622 can only be rotated after the button 626 is pressed, which further ensures safety. Button 626 and pressing block 625 can be engaged by inclined contact. When button 626 is pressed, pressing block 625 is disengaged from gap 624 by pushing against it through the inclined surface.

[0045] like Figure 9 and Figure 10As shown, the second locking assembly 63 includes a second locking hole 631 provided on the second connecting seat 22. The second support frame 32 is provided with a second locking rod 632 that can slide relative to it and engage or disengage from the second locking hole 631. A fifth return spring 633 is provided between the second locking rod 632 and the second support frame 32 to push the second locking rod 632 to slide back to its original position. The second connecting seat 22 is provided with a sliding groove 221 that communicates with the second locking hole 631. The second unlocking assembly 64 includes a push rod 641 that can slide within the sliding groove 221 and push the second locking rod 632 out of the second locking hole 631 when sliding. The first support frame 31 is provided with a drive wall 642 that can push the push rod 641 to slide when it rotates and folds relative to the second connecting seat 22. A sixth return spring 643 is provided between the push rod 641 and the second connecting seat 22 to push the push rod 641 to slide back to its original position. When the basket frame 10 is in the unfolded state, the second locking rod 632 is inserted into the second locking hole 631. During the unlocking of the first locking assembly 61 and the rotation and folding of the first support frame 31, the drive wall 642 on the first support frame 31 pushes the push rod 641 to slide in the second connecting seat 22. During the sliding process, the push rod 641 pushes the second locking rod 632 out of the second locking hole 631, thereby unlocking the second locking assembly 63. Therefore, the unlocking of the second locking assembly 63 is driven by the first support frame 31 during the rotation and folding process, and the unlocking operation is convenient.

[0046] like Figures 8 to 11As shown, the third locking assembly 65 includes a third locking hole 651 provided on the side wall of the first support rod 11. The second support rod 12 includes a sliding rod 121 that can slide within the first support rod 11 and a third connecting seat 122 fixed within the sliding rod 121. The unlocking part 14 is the lower end of the third connecting seat 122. The third connecting seat 122 is provided with a locking block 652 that can move laterally within it and can pass through the side wall of the second support rod 12 to engage or disengage with the third locking hole 651. The third connecting seat 122 is also provided with a seventh return spring 653 that can push the locking block 652 to slide back to its original position. The third unlocking component 66 includes a sliding seat 661 that can slide up and down within the third connecting seat 122 and can drive the locking block 652 to disengage from the third locking hole 651 when sliding upward. The third unlocking component 66 also includes a moving block 662 disposed within the second connecting seat 22 and which can be driven upward by the pushing rod 641 when the pushing rod 641 pushes the second locking rod 632. A second pull rope 663 is provided between the moving block 662 and the sliding seat 661 to connect the two. An eighth return spring 664 is also provided between the third connecting seat 122 and the sliding seat 661 to push the sliding seat 661 to slide back to its original position. When the basket frame 10 is in the unfolded state, the locking block 652 engages with the third locking hole 651. When the first support frame 31 rotates, driving the second unlocking component 64, the sliding push rod 641 pushes the moving block 662 upwards. The moving block 662 then pulls the sliding seat 661 upwards via the second pull rope 663. The sliding seat 661 then drives the locking block 652 to disengage from the third locking hole 651, thereby unlocking the third locking component 65. The sliding seat 661 and the drive block 652 can be engaged with an inclined surface, thus converting the vertical movement of the sliding seat 661 into the lateral movement of the locking block 652. Similarly, the push rod 641 and the moving block 662 can also be engaged with an inclined surface. Therefore, during the rotation of the first support frame 31 and the pushing rod 641, both the second locking component 63 and the third locking component 65 are simultaneously unlocked, making the folding operation of the basket frame 10 very convenient and quick. When the third locking assembly 65 is unlocked, causing the second support rod 12 to slide downward relative to the first support rod 11, the lower end of the third connecting seat 122 pushes against the locking assembly 8, thereby unlocking the frame 7.

[0047] like Figures 12 to 17As shown, the frame 7 includes a rear leg 71, with a rear wheel 7a at the lower end of the rear leg 71 and a rear leg seat 72 at the upper end of the rear leg 71. A first connecting piece 73 is rotatably connected to the rear leg seat 72, and a front leg 74 is fixedly connected to the first connecting piece 73. A front wheel 7b is located at the lower end of the front leg 74. A second connecting piece 75 is also rotatably connected to the rear leg seat 72, and a push rod assembly 76 is fixedly connected to the second connecting piece 75. The first connecting piece 73 and the second connecting piece 75 are hinged together, and the second connecting piece 75 and the push rod assembly 76 are positioned relative to each other. When the leg seat 72 rotates and folds, it can drive the first connecting piece 73 and the front leg 74 to rotate and fold relative to the rear leg 71. The connecting part 78 is provided on the rear leg seat 72. The locking assembly 8 includes a locking part 81 provided on the second connecting piece 75. The rear leg seat 72 is provided with a locking block 82 that can slide relative to it and engage or disengage with the locking part 81. A ninth return spring 83 is provided between the locking block 82 and the rear leg seat 72 to push the locking block 82 to slide back to its original position. The locking block 82 is provided with a protruding block 84 that is exposed on the rear leg seat 72 and can be pushed by the unlocking part 14 when the basket frame 10 is folded. During the folding process of the basket frame 10, the unlocking part 14 of the second support rod 12 pushes the protruding block 84, causing the locking block 82 to slide and disengage from the locking part 81. At this time, the locking assembly 8 is unlocked. Then, the push rod assembly 76 can be pulled backward to rotate relative to the rear leg seat 72. As the push rod assembly 76 rotates and moves closer to the rear leg 71, the second connecting piece 75 pulls the first connecting piece 73 to rotate relative to the rear leg seat 72 through the linkage piece 77, thereby causing the front leg 74 to rotate and move closer to the rear leg 71, thus realizing the folding operation of the trolley.

[0048] When the stroller needs to be folded, simply press button 626 and rotate operating block 622 to unlock the first locking assembly 61. During the folding process, the second locking assembly 63 and the third locking assembly 65 of the first support frame 31 are unlocked. The second support frame 32 then folds and the second support rod 12 slides and retracts relative to the first support rod 11. During the sliding process, the unlocking part 14 at the lower end of the second support rod 12 pushes the protrusion 84 to unlock the locking assembly 8 of the frame 7. Then, rotating the push rod assembly 76 will fold the frame 7. The entire stroller folding operation is very convenient and quick.

[0049] 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 trolley, characterized in that: The vehicle includes a foldable frame (7), on which a locking assembly (8) is provided for locking it in an unfolded state. A basket frame (10) that can be unfolded or folded is also detachably connected to the frame (7). A connecting part (78) is fixedly provided on the frame (7). The basket frame (10) is detachably connected to the connecting part (78) via a snap-fit ​​seat (13) provided thereon. The basket frame (10) is provided with an unlocking part (14). During the process of the basket frame (10) moving from an unfolded state to a folded state, the unlocking part (14) drives the locking assembly (8) to unlock so that the frame (7) can be folded.

2. The trolley according to claim 1, characterized in that: The basket frame (10) includes a first support rod (11), and a second support rod (12) that can slide up and down relative to the first support rod (11) is connected to the first support rod (11). The upper end of the second support rod (12) is provided with a second connecting seat (22). The two sides of the second connecting seat (22) are rotatably connected to a first support frame (31) and a second support frame (32). The snap-fit ​​seat (13) is provided on the first support rod (11), and the unlocking part (14) is provided on the second support rod (12). During the process of the basket frame (10) moving from the unfolded state to the folded state, the first support frame (31) and the second support frame (32) rotate and fold relative to the second connecting seat (22) and move closer to each other. The second support rod (12) slides and retracts relative to the first support rod (11), so that the unlocking part (14) drives the locking assembly (8) to unlock.

3. The trolley according to claim 2, characterized in that: The lower end of the first support rod (11) is provided with a first connecting seat (21). The first connecting seat (21) is rotatably connected to a first support frame (41) and a second support frame (42). When the first support frame (31) and the second support frame (32) rotate and fold relative to the second connecting seat (22) and move closer to each other, the first support frame (41) and the second support frame (42) rotate relative to the first connecting seat (21) and move closer to each other.

4. The trolley according to claim 3, characterized in that: A first linkage member (51) is provided between the first support frame (31) and the first support frame (41) for movable connection between the two. A second linkage member (52) is provided between the second support frame (32) and the second support frame (42) for movable connection between the two. The first linkage member (51) includes a U-shaped first linkage rod (511), the upper end of which is hinged to the first support frame (31), and the lower end of which is hinged to the first support frame (41). The second linkage member (52) includes a U-shaped second linkage rod (521), the upper end of which is hinged to the second support frame (32), and the lower end of which is hinged to the second support frame (42).

5. The trolley according to claim 2, characterized in that: A handle (33) is connected to the first support frame (31) or the second connecting seat (22). The handle (33) includes a fixed seat (331) fixed to the first support frame (31) or the second connecting seat (22). The handle (33) also includes a U-shaped rod (332) and a rod sleeve (333) slidably connected to the rod (332). The rod sleeve (333) is rotatably connected to the fixed seat (331). A locking assembly for locking the fixed base (331) and the rod sleeve (333) is provided. The locking assembly includes a locking groove (341) arranged circumferentially on the fixed base (331) and the rod sleeve (333). Within the space enclosed by the fixed base (331) and the rod sleeve (333), there is a locking element (342) that can move laterally and engages simultaneously with the locking groove (341) on the fixed base (331) and the rod sleeve (333). The locking element (342) engages with the rod. A sliding block (343) is provided between the sleeves (333) to allow radial sliding and to push the engaging member (342) away from the engaging groove (341) on the rod sleeve (333) during sliding. The rod (332) is provided with a pusher block (344) that pushes the sliding block (343) to slide when it slides relative to the rod sleeve (333). The sliding block (343) is provided with a first inclined surface (345), and the rod sleeve (333) is provided with a surface that interacts with the first inclined surface (345). 345) A second inclined surface (346) is provided to cooperate with and push the first inclined surface (345) when the sliding block (343) slides, so as to move the locking member (342) laterally. A first return spring (347) is provided between the locking member (342) and the fixed seat (331) to push the locking member (342) to return to its lateral position. A second return spring (348) is provided between the pushing block (344) and the rod sleeve (333) to push the rod (332) to return to its sliding position.

6. The trolley according to claim 2 or 3, characterized in that: The locking device of the basket frame (10) includes a first locking assembly (61) disposed between the first support frame (31) and the second connecting seat (22), a first unlocking assembly (62) for unlocking the first locking assembly (61) is provided on the first support frame (31), a second locking assembly (63) is disposed between the second support frame (32) and the second connecting seat (22), a second unlocking assembly (64) is disposed between the first support frame (31) and the second locking assembly (63) that can drive the second locking assembly (63) to unlock when the first support frame (31) rotates and folds relative to the second connecting seat (22), a third locking assembly (65) for locking the two is disposed between the second support rod (12) and the first support rod (11), and a third unlocking assembly (66) is disposed in the second connecting seat (22) that can be driven by the second unlocking assembly (64) to unlock the third locking assembly (65) when the second unlocking assembly (64) unlocks the second locking assembly (63).

7. The trolley according to claim 6, characterized in that: The first locking assembly (61) includes a first locking hole on the second connecting seat (22). The first support frame (31) contains a first locking rod (611) that can slide relative to it and engage or disengage from the first locking hole. A third return spring (612) is provided between the first locking rod (611) and the first support frame (31) to push the first locking rod (611) back to its original position. The first unlocking assembly (62) includes an unlocking seat (621) fixed to the first support frame (31). An operating block (622) is rotatably connected to the unlocking seat (621). A first pull rope (623) is provided between the operating block (622) and the first locking rod (611) to pull the first locking rod (611) away from the first locking hole when the operating block (622) rotates. A gap (624) is formed between the operating block (622) and the unlocking seat (621). The operating block (622) is provided with a pressing block (625) that can slide inside and engage or disengage from the gap (624). When the pressing block (625) is in the gap (624), the pressing block (625) prevents the operating block (622) from rotating relative to the unlocking seat (621). When the pressing block (625) disengages from the gap (624), the pressing block (625) makes way for the rotation of the operating block (622). The operating block (622) is provided with a button (626) that can push the pressing block (625) out of the gap (624). A fourth return spring (627) that can push the pressing block (625) back to its original position is provided between the pressing block (625) and the operating block (622).

8. The trolley according to claim 7, characterized in that: The second locking assembly (63) includes a second locking hole (631) on the second connecting seat (22), a second locking rod (632) that can slide relative to the second supporting frame (32) and engage or disengage from the second locking hole (631), a fifth return spring (633) that can push the second locking rod (632) to slide back to its original position between the second locking rod (632) and the second supporting frame (32), and a groove communicating with the second locking hole (631) on the second connecting seat (22). 221), the second unlocking component (64) includes a push rod (641) that can slide in the slide groove (221) and push the second locking rod (632) out of the second locking hole (631) when sliding. The first support frame (31) is provided with a drive wall (642) that can push the push rod (641) to slide when it rotates and folds relative to the second connecting seat (22). A sixth return spring (643) is provided between the push rod (641) and the second connecting seat (22) to push the push rod (641) to slide and reset.

9. The trolley according to claim 8, characterized in that: The third locking assembly (65) includes a third locking hole (651) on the side wall of the first support rod (11). The second support rod (12) includes a sliding rod (121) that can slide within the first support rod (11) and a third connecting seat (122) fixed within the sliding rod (121). The third connecting seat (122) is provided with a locking block (652) that can move laterally within it and can pass through the side wall of the second support rod (12) to engage or disengage with the third locking hole (651). The third connecting seat (122) is also provided with a seventh return spring (653) that can push the locking block (652) to slide back to its original position. The third unlocking assembly (66) includes... The third unlocking assembly (66) includes a sliding seat (661) that can slide up and down within the third connecting seat (122) and can drive the locking block (652) to disengage from the third locking hole (651) when sliding upward. The third unlocking assembly (66) also includes a moving block (662) that is disposed within the second connecting seat (22) and can be driven upward by the push rod (641) when the push rod (641) pushes the second locking rod (632). A second pull rope (663) is provided between the moving block (662) and the sliding seat (661) to connect the two. An eighth return spring (664) that can push the sliding seat (661) to slide back to its original position is also provided between the third connecting seat (122) and the sliding seat (661).

10. The trolley according to claim 1, characterized in that: The frame (7) includes a rear leg (71), a rear wheel (7a) at the lower end of the rear leg (71), a rear leg seat (72) at the upper end of the rear leg (71), a first connecting piece (73) rotatably connected to the rear leg seat (72), a front leg (74) fixedly connected to the first connecting piece (73), a front wheel (7b) at the lower end of the front leg (74), a second connecting piece (75) rotatably connected to the rear leg seat (72), a push rod assembly (76) fixedly connected to the second connecting piece (75), and a hinge between the first connecting piece (73) and the second connecting piece (75) and the push rod assembly (76) relative to the rear leg seat (74). 72) When rotating and folding, a linkage piece (77) can drive the first connecting piece (73) and the front leg (74) to rotate and fold relative to the rear leg (71). The connecting part (78) is provided on the rear leg seat (72). The locking assembly (8) includes a locking part (81) provided on the second connecting piece (75). The rear leg seat (72) is provided with a locking block (82) that can slide relative to it and engage or disengage with the locking part (81). A ninth return spring (83) is provided between the locking block (82) and the rear leg seat (72) to push the locking block (82) to slide back to its original position. The locking block (82) is provided with a protruding block (84) that is exposed on the rear leg seat (72) and can be pushed by the unlocking part (14) when the basket frame (10) is folded.

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