GB2535632A

GB2535632A - Stroller

Info

Publication number: GB2535632A
Application number: GB1600769.2A
Authority: GB
Inventors: Yi Xiaolong
Original assignee: Wonderland Nurserygoods Co Ltd Hong Kong
Current assignee: Wonderland Nurserygoods Co Ltd Hong Kong
Priority date: 2015-01-16
Filing date: 2016-01-15
Publication date: 2016-08-24
Anticipated expiration: 2036-01-15
Also published as: GB201600761D0; CN105835932A; DE102016200437B4; DE102016200437A1; GB201600754D0; GB201600769D0; CN105835932B; GB2535632B

Abstract

A stroller (100, fig 1) includes a frame folding mechanism (2). The frame folding mechanism includes a folding seat 21, bottom pipes 22 pivoted between the folding seat and two lateral frames (1) of the stroller respectively, an engaging component 28, a recovering component (29), a grip 23 pivoted to the folding seat, a pushing component 24 slidably disposed inside the folding seat and a driving component 25 pivoted to the folding seat. The engaging component and the recovering component are disposed on one end of the bottom pipes pivoted to the folding seat. The recovering component drives the engaging component to stretch into the folding seat. The driving component abuts between the engaging component and the pushing component. When the grip drives the engaging component to retract into the corresponding bottom pipe by cooperation of the pushing component and the driving component, the bottom pipes and the folding seat are released for folding the stroller easily.

Description

STROLLER

Background of the Invention

1. Field of the Invention

The present invention relates to a stroller, and more particularly, to a stroller with easy operation and capable of being folded by one hand.

2. Description of the Prior Art

In order to satisfy various consumers' demands for practicability and convenience, strollers are usually designed to be foldable. In such a way, the strollers can be unfolded when the strollers are in use, and the strollers can be folded for easy storage and transportation when the strollers are not in use.

When it is desired to fold a conventional stroller, it requires two hands to fold front feet, rear feet and lateral handles, which are pivoted to one another. However, it is difficult and dangerous for a parent to carry an infant and to fold the stroller at the same time.

Therefore, there is a need to design a stroller with easy operation and capable of being folded by one hand.

Summary of the Invention

In order to solve the aforementioned drawbacks, the present invention is to provide a stroller with easy operation and capable of being folded by one hand.

According to the claimed invention, a stroller includes two lateral frames and a frame folding mechanism. Each of the two lateral frames includes a front foot and a rear foot. The frame folding mechanism is connected between the two lateral frames. The frame folding mechanism includes a folding seat, a plurality of bottom pipes, at least one engaging component, at least one recovering component, a grip, a pushing component and at least one driving component. A chamber is formed inside the folding seat. The plurality of bottom pipes is radially disposed on a periphery of the folding seat. Ends of the plurality of bottom pipes are pivoted to the folding seat. The other ends of the plurality of bottom pipes are pivoted to the two front feet and the two rear feet of the two lateral frames respectively. The at least one engaging component is disposed on at least one of the ends of the plurality of bottom pipes pivoted to the folding seat. The at least one recovering component is disposed on the at least one of the ends of the plurality of bottom pipes pivoted to the folding seat. The at least one recovering component drives the at least one engaging component to stretch into the chamber. The grip is pivoted to the folding seat. The pushing component is slidably disposed inside the folding seat. The at least one driving component is pivoted to the folding seat. Two ends of the at least one driving component abut against the at least one engaging component and the pushing component respectively. When the grip rotates to drive the pushing component to move, the pushing component drives the at least one driving component to push the at least one engaging component to retract into the at least one corresponding bottom pipe, such that the plurality of bottom pipes and the folding seat are released to be foldable.

Preferably, a pivoting axis of the grip is parallel to a moving direction of the pushing component. A screw surface is formed on the grip, and the grip rotates to drive the pushing component by the screw surface. When the grip rotates, the pushing component is driven by the screw surface, which simplifies a folding process and brings convenience.

Preferably, the frame folding mechanism further includes a recovering extension spring disposed between the pushing component and the folding seat.

Preferably, an inclined surface is formed on the pushing component for pushing the at least one driving component to rotate when the pushing component moves.

Preferably, the frame folding mechanism further includes a recovering torsion spring disposed between the grip and the folding seat for folding the grip relative to the folding seat.

Preferably, a first abutting surface is formed on a top surface of the chamber. A second abutting surface is formed on a top surface of a protruding end of the at least one engaging component, and the first abutting surface abuts against the second abutting surface.

Specifically, a first curved surface is formed on an end of the at least one driving component. A second curved surface is formed on a bottom surface of a protruding end of the at least one engaging component, and the first curved surface abuts against the second curved surface.

Preferably, each of the two lateral frames includes a handle. Two upper ends of the two front feet are pivoted to two ends of the two handles, and two upper ends of the two rear feet are pivoted to the two handles, which reduces a volume of the stroller after the stroller is folded.

Specifically, the stroller further includes at least one quick detachable assembly and a canopy installed on one of the two handles via the at least one quick detachable assembly.

More specifically, the at least one quick detachable assembly includes a connecting portion, a fixing portion and an engaging hook. The connecting portion is connected to the canopy. The fixing portion is fixed on the one of the two handles where the canopy is installed. A middle portion of the engaging hook is pivoted to the fixing portion. An engaging slot is formed on the one of the two handles where the canopy is installed, and an engaging end of the engaging hook engages with the engaging slot, which is more convenient and more flexible to install the canopy.

More specifically, the stroller further includes an engaging seat disposed on the one of the two handles where the canopy is installed. The engaging slot is formed on the engaging seat, and the fixing portion is slidably sleeved on the engaging seat.

More specifically, the at least one quick detachable assembly further includes a pressing portion and a compressed spring. The pressing portion is disposed on the other end of the engaging hook. The compressed spring is disposed between the pressing portion and the fixing portion, which effectively enhances stability and safety of the connection of the canopy.

Specifically, one of the two lateral frames further includes a folding hook fixed on the handle of the one of the two lateral frames. The folding hook includes an engaging rib. A sliding slot is formed on the rear foot of the one of the two lateral frames. When the stroller is folded completely, the two handles are adjacent to the two rear feet, and the engaging rib engages with the sliding slot for locking the stroller at a folding position. Therefore, the two handles and the two rear feet can be positioned, which prevents the stroller from being unfolded accidentally.

More specifically, the stroller further includes an engaging protrusion, a cup holder and an engaging portion. The engaging protrusion is disposed on the folding hook. The engaging portion is disposed on the cup holder and cooperates with the engaging protrusion.

More specifically, the frame folding mechanism includes four bottom pipes, two engaging components, two recovering components and two driving components. The four bottom pipes are radially disposed on the periphery the folding seat. Ends of the four bottom pipes are pivoted to the folding seat. The other ends of the four bottom pipes are pivoted to the two front feet and the two rear feet of the two lateral frames respectively. The two engaging components are disposed on two opposite ends of the four bottom pipes pivoted to the folding seat. The two recovering components are disposed on the two opposite ends of the four bottom pipes pivoted to the folding seat. The two recovering components drive the two engaging components to stretch into the chamber. The two driving components are pivoted to the folding seat. Two ends of each of the two driving components abut against the corresponding engaging component and the pushing component respectively. When the grip rotates to drive the pushing component to move, the pushing component drives the two driving components to push the two engaging components to retract into the two corresponding bottom pipes, such that the four bottom pipes and the folding seat are released to be foldable.

More specifically, the stroller further includes two quick detachable assemblies and a canopy installed on the two handles via the two quick detachable assemblies.

In summary, the pushing component is slidably disposed inside the folding seat. The driving component is pivoted to the inner side of the folding seat. The two ends of the driving component abut against the engaging component disposed on the corresponding bottom pipe and the pushing component. The grip is pivoted to the outer side of the folding seat. In such a way, the stroller of the present invention utilizes the grip for rotatably driving the pushing component to drive the driving component to rotate, so that the engaging component is driven to retract into the corresponding bottom pipe by the driving component, which releases the bottom pipes and the folding seat. The bottom pipes can be folded relative to the folding seat by pulling folding seat upwardly. Furthermore, the stroller further utilizes the recovering extension spring and the recovering torsion spring for recovering the driving component and the pushing component, which allows the stroller to be locked automatically after the stroller is unfolded. In other words, the stroller of the present invention can be folded or unfolded by operating the folding seat with only one hand easily. Therefore, the present invention has an advantage of easy operation.

These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.

Brief Description of the Drawings

FIG. 1 is a schematic diagram of a stroller according to an embodiment of the present invention.

FIG. 2 is a diagram of a frame folding mechanism according to the embodiment of the present invention.

FIG. 3 is an exploded diagram of the frame folding mechanism according to the embodiment of the present invention.

FIG. 4 is an exploded diagram of the frame folding mechanism without illustrating a folding seat at another view according to the embodiment cf the present invention.

FIG. 5 is a sectional diagram of the frame folding mechanism according to the embodiment of the present invention.

FIG. 6 is a diagram of a grip according to the embodiment of the present invention.

FIG. 7 is a diagram of the grip at another view according to the embodiment of the present invention.

FIG. 8 is an enlarged diagram of an A portion of the stroller shown in FIG. 1 according to the embodiment of the present invention.

FIG. 9 is a diagram of one quick detachable assembly and one handle according to the embodiment of the present invention.

FIG. 10 is a sectional diagram of the quick detachable assembly according to the embodiment of the present invention.

FIG. 11 is a sectional diagram of the frame folding mechanism at a releasing position according to the embodiment of the present invention.

FIG. 12 is a diagram of the stroller in a folding status according to the embodiment of the present invention.

FIG. 13 is an enlarged diagram of a B portion of the stroller shown in FIG. 12 according to the embodiment of the present invention.

Detailed Description

In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, directional terminology, such as "top," "bottom," "front," "back," etc., is used with reference to the orientation of the Figure (s) being described. The components of the present invention can be positioned in a number of different orientations. As such, the directional terminology is used for purposes of illustration and is in no way limiting. Accordingly, the drawings and descriptions will be regarded as illustrative in nature and not as restrictive.

Please refer to FIG. 1 to FIG. 5. FIG. 1 is a schematic diagram of a stroller 100 according to an embodiment of the present invention. FIG. 2 is a diagram of a frame folding mechanism 2 according to the embodiment of the present invention. FIG. 3 is an exploded diagram of the frame folding mechanism 2 according to the embodiment of the present invention. FIG. 4 is an exploded diagram of the frame folding mechanism 2 without illustrating a folding seat 21 at another view according to the embodiment of the present invention. FIG. 5 is a sectional diagram of the frame folding mechanism 2 according to the embodiment of the present invention. As shown in FIG. 1 to FIG. 5, the stroller 100 of the present invention includes two lateral frames 1 and a frame folding mechanism 2 connected between the two lateral frames 1. Each of the two lateral frames 1 includes a front foot 11 and a rear foot 12. The frame folding mechanism 2 includes a folding seat 21, four bottom pipes 22, a grip 23, a pushing component 24, two driving components 25, a recovering extension spring 26, a recovering torsion spring 27, two engaging components 28 and two recovering components 29. The four bottom pipes 22 are radially disposed on a periphery of the folding seat 21. Ends of the four bottom pipes 22 are pivoted to the folding seat 21 by four pivoting shafts 221. The other ends of the four bottom pipes 22 are pivoted to the two front feet 11 and the two rear feet 12 of the two lateral frames 1 respectively. In this embodiment, the bottom pipes 22, the engaging components 28, and the recovering components 29 are disposed symmetrically. The numbers of the bottom pipes 22, the engaging components 28, and the recovering components 29 are not limited to this embodiment, and it depends on the actual design demand.

A chamber 211 is formed inside the folding seat 21. The two engaging components 28 and the two recovering components 29 are disposed on two opposite ends of the four bottom pipes 22 pivoted to the folding seat 21. The two engaging components 28 are placed inside the two opposite ends of the four bottom pipe 22 pivoted to the folding seat 21. The two recovering components 29 are disposed between the two engaging components 28 and the two pivoting shafts 221 corresponding to the two engaging components 28. In this embodiment, the two recovering components 29 can be two compressed springs for driving the two engaging components 28 to stretch out of the two opposite ends of the four bottom pipes 22 and into the chamber 211 slidably. A first abutting surface 21a is formed on a top surface of the chamber 211. A second abutting surface 28a is formed on a top surface of a protruding end of each of the two engaging components 28. When the two engaging components 28 stretch into the chamber 211, the first abutting surface 21a abuts against the two second abutting surfaces 28a for maintaining the four bottom pipes 22 at an unfolding position.

Please refer to FIG. 6 and FIG. 7. FIG. 6 is a diagram of the grip 23 according to the embodiment of the present invention. FIG. 7 is a diagram of the grip 23 at another view according to the embodiment of the present invention. As shown in FIG. 4 to FIG. 7, the grip 23 is pivoted an outer side of the folding seat 21. Specifically, the grip 23 has two pivoting lugs 231 disposed on two ends of the grip 23. The grip 23 is pivoted to the folding seat 21 by the two pivoting lugs 231. The pushing component 24 is slidably disposed inside the folding seat 21. A pivoting axis of the grip 23 is parallel to a moving direction of the pushing component 24. A screw surface 232 is disposed on one of the two pivoting lugs 231 of the grip 23. The recovering extension spring 26 is disposed between the pushing component 24 and the folding seat 21 for driving a pushing portion 242 of the pushing component 24 to abut against the screw surface 232 at a lowest position of the screw surface 232. When the grip 23 rotates, the pushing component 24 is driven to move by the screw surface 232.

A middle portion of each of the two driving components 25 is pivoted to an inner side of the folding seat 21. Two ends of each of the two driving components 25 abut against the corresponding engaging component 28 and the pushing component 24 respectively. Specifically, a first curved surface 25a is formed on an end of each of the two driving components 25 facing to the corresponding engaging component 28. A second curved surface 28b is formed on a bottom surface of the protruding end of each of the two engaging components 28. The two first curved surfaces 25a abut against the two second curved surfaces 28b. An inclined surface 241 is formed on the pushing component 24 for pushing the driving component 25 to rotate when the pushing component 24 moves. When it is desired to fold the stroller 1CO3 the grip 23 rotates to drive the pushing component 24 to push the two driving components 25, so that the two driving components 25 rotate to push the two engaging components 28 to retract into the two corresponding bottom pipes 22 by abutting action of the first curved surface 25a and the two second curved surfaces 28b until the two second abutting surfaces 28a does not abut against the first abutting surface 21a anymore. In such a way, the four bottom pipes 22 and the folding seat 21 are released, and the four bottom pipes 22 can be rotatably folded around the four pivoting shafts 221. In other words, the grip 23 can drive the pushing component 24 by disposal of the screw surface 232 when the grip 23 rotates. Therefore, rotating the grip 23 is an essential process when folding the stroller 100. It not only simplifies a folding process of the stroller 100 but also brings convenience for operation.

Furthermore, the recovering extension spring 26 is for driving the pushing component 24 to recover. The recovering torsion spring 27 is disposed between the grip 23 and the folding seat 21 and is located at the other pivoting lug 231 opposite to the screw surface 232 for driving the grip 23 to move toward the folding seat 21, i.e., the grip 23 can recover and move close to the folding seat 21 by the recovering torsion spring 27. When the grip 23 recovers, the pushing portion 242 of the pushing component 24 is located at the lowest position of the screw surface 232.

Please refer to FIG. 8 to FIG. 10. FIG. 8 is an enlarged diagram of an A portion of the stroller 100 shown in FIG. 1 according to the embodiment of the present invention. FIG. 9 is a diagram of one quick detachable assembly 5 and one handle 3 according to the embodiment of the present invention. FIG. is a sectional diagram of the quick detachable assembly 5 according to the embodiment of the present invention. As shown in FIG. 1 and FIG. 8 to FIG. 10, the stroller 100 further Includes two quick detachable assemblies 5 and a canopy 4. In this embodiment, the quick detachable assemblies 5 are disposed symmetrically. The number of the quick detachable assembly is not limited to this embodiment, and it depends on the actual design demand. Each of the two lateral frames 1 includes a handle 3. Upper ends of the two front feet 11 are pivoted to ends of the two handles 3, and upper ends of the two rear feet 12 are pivoted to the two handles 3, such that the stroller 100 can be folded into a smaller size. The canopy 4 is installed on the two handles 3 by the two quick detachable assemblies 5. Each of the two quick detachable assemblies 5 includes a connecting portion 51, a fixing portion 52 and an engaging hook 53. The two connecting portions 51 are connected to the canopy 4. Middle portions of the two engaging hooks 53 are pivoted to the two fixing portions 52. An engaging slot 31 is formed on each of the two handles 3. The two fixing portions 52 are slidably connected to the two engaging slots 31, such that the two quick detachable assemblies 5 can slide relative to the two handles 3 when the two quick detachable assemblies 5 and two handles 3 are unlocked.

Specifically, the stroller 100 further includes an engaging seat 3a disposed on each of the two handles 3. The two engaging slots 31 are formed on the two engaging seats 3a. The two fixing portions 52 are slidably sleeved on the two engaging seats 3a. When the two fixing portions 52 are fixed on the two handles 3, two engaging ends 531 of the two engaging hooks 53 engage with the two engaging slots 31, such that the two quick detachable assemblies 5 and the two handles 3 are locked to each other. In other words, by engagement of the two engaging hooks 53 and the two engaging slots 31, the two quick detachable assemblies 5 can be engaged with the two handles 3 quickly, which is convenient and flexible for operation of the canopy 4.

Each of the two quick detachable assemblies 5 further includes a pressing portion 532 and a compressed spring 54.

The two pressing portions 532 are disposed on the other end of the two engaging hooks 53. The two compressed springs 54 are disposed between the two pressing portions 532 and the two fixing portions 52. The two compressed springs 54 drive the two engaging ends 531 of the two engaging hooks 53 to engage with the two engaging slots 31, which ensures connections between the two quick detachable assemblies 5 and the two handles 3 and effectively enhances stability and safety of connection of the canopy 4.

Please refer to FIG. 12 and FIG. 13. FIG. 12 is a diagram of the stroller 100 in a folding status according to the embodiment of the present invention. FIG. 13 is an enlarged diagram of a B portion of the stroller 100 shown in FIG. 12 according to the embodiment of the present invention. As shown in FIG. 12 and FIG. 13, one of the two lateral frames 1 further includes a folding hook 32 fixed on the handle 3 of the one of the two lateral frames 1. The folding hook 32 includes an engaging rib 321. A sliding slot 121 is formed on the rear foot 12 of the one of the two lateral frames 1.When the stroller 100 is folded completely, the two handles 3 are adjacent to the two rear feet 12, and the engaging rib 321 engages with the sliding slot 121 for locking the stroller 100 in the folding status. In other words, by cooperation of the folding hook 32 and the sliding slot 121, the two handles 3 and the two rear feet 12 are locked to each other, such that the stroller 100 can be folded and positioned in the folding status stably, which effectively prevents the stroller 100 from being unfolded accidentally. Furthermore, the stroller 100 further Includes an engaging protrusion 322, a cup holder 6 and an engaging portion 61. The engaging protrusion 322 is disposed on the folding hook 32. The engaging portion 61 is disposed on the cup holder 6 and cooperates with the engaging protrusion 322. By cooperation of the engaging portion 61 and the engaging protrusion 322, the cup holder 6 can be installed on the handle Operational principle illustrating a folding process of the stroller 100 of the present invention is described as follows. Please refer to FIG. 11. FIG. 11 is a sectional diagram of the frame folding mechanism 2 at a releasing position according to the embodiment of the present invention. As shown in FIG. 5, FIG. 11 and FIG. 12, when it is desired to fold the stroller 100, it only requires one hand to rotate the grip 23 to compress the recovering torsion spring 27 firstly. The screw surface 232 of the grip 23 drives the pushing component 24 to move from the lowest position to a highest position of the screw surface 232. When the pushing component 24 moves inside the folding seat 21 and compresses the recovering extension spring 26, the inclined surface 241 of the pushing component 24 pushes ends of the two driving components 25 to rotate downwardly, such that the other ends of the two driving components 25 rotate upwardly to push the two engaging components 28 to retract into the two corresponding bottom pipes 22. When the two engaging components 28 retract into the two corresponding bottom pipes 22, the two second abutting surfaces 28a disengage from the first abutting surface 21a, such that the two engaging components 28 do not abut against the folding seat 21 anymore. Therefore, the four bottom pipes 22 and the folding seat 21 are released to be foldable. Afterwards, it has to lift the grip 23 upwardly by the same hand, so that the folding seat 21 drives the ends of the four bottom pipes 22 pivoted to the folding seat to move upwardly and drives the other ends of the four bottom pipes 22 to move close to one another downwardly. Therefore, the two handles 3 are driven to rotate close to the two front feet 11, and the two lateral frames 1 are driven to move close to each other until the stroller 100 is folded completely.

When the stroller 100 is folded completely, the two handles 3 and the two rear feet 12 are adjacent to each other. The engaging rib 321 of the folding hook 32 can engage with the sliding slot 121 for positioning the two handles 3 and the two rear feet 12, such that the stroller 100 is locked at the folding status. When it is desired to unfold the stroller 100, it has to disengage the engaging rib 321 from the sliding slot 121 and push the folding seat 21 to move downwardly by one hand. The folding seat 21 drives the four bottom pipes 22 to be unfolded. During a process of unfolding the four bottom pipes 22, the four bottom pipes 22 drive the two lateral frames 1 to move away from each other. When the four bottom pipes 22 are fully unfolded, the two engaging components 28 are driven to stretch out of the two corresponding bottom pipes 22 and pass through two side walls 21b of the folding seat 21 by the two recovering components 29, so that the two second abutting surfaces 28a abut against the first abutting surface 21a. At this moment, the frame folding mechanism 2 is locked, i.e., the stroller 100 is locked at an unfolding status.

In contrast to the prior art, the pushing component is slidably disposed inside the folding seat. The driving component is pivoted to the inner side of the folding seat. The two ends of the driving component abut against the engaging component disposed on the corresponding bottom pipe and the pushing component. The grip is pivoted to the outer side of the folding seat. In such a way, the stroller of the present invention utilizes the grip for rotatably driving the pushing component to drive the driving component to rotate, so that the engaging component is driven to retract into the corresponding bottom pipe by the driving component, which releases the bottom pipes and the folding seat. The bottom pipes can be folded relative to the folding seat by pulling folding seat upwardly. Furthermore, the stroller further utilizes the recovering extension spring and the recovering torsion spring for recovering the driving component and the pushing component, which allows the stroller to be locked automatically after the stroller is unfolded. In other words, the stroller of the present invention can be folded or unfolded by operating the folding seat with only one hand easily. It has an advantage of easy operation.

Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while rezaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.

Claims

Claims What is claimed is: 1. A stroller comprising: two lateral frames, each of the two lateral frames comprising a front foot and a rear foot; and a frame folding mechanism connected between the two lateral frames, the frame folding mechanism comprising: a folding seat, a chamber being formed inside the folding seat; a plurality of bottom pipes radially disposed on a periphery of the folding seat, ends of the plurality of bottom pipes being pivoted to the folding seat, the other ends of the plurality of bottom pipes being pivoted to the two front feet and the two rear feet of the two lateral frames respectively; at least one engaging component disposed on at least one of the ends of the plurality of bottom pipes pivoted to the folding seat; at least one recovering component disposed on the at least one of the ends of the plurality of bottom pipes pivoted to the folding seat, the at least one recovering component driving the at least one engaging component to stretch into the chamber; a grip pivoted to the folding seat; a pushing component slidably disposed inside the folding seat; and at least one driving component pivoted to the folding seat, two ends of the at least one driving component abutting against the at least one engaging component and the pushing component respectively; wherein when the grip rotates to drive the pushing component to move, the pushing component drives the at least one driving component to push the at least one engaging component to retract into the at least one corresponding bottom pipe, such that the plurality of bottom pipes and the folding seat are released to be foldable.
2. The stroller of claim 1, wherein a pivoting axis of the grip is parallel to a moving direction of the pushing component, a screw surface is formed on the grip, and the grip rotates to drive the pushing component by the screw surface.
3. The stroller of claim 1, wherein the frame folding mechanism further comprises a recovering extension spring disposed between the pushing component and the folding seat.
4. The stroller of claim 1, wherein an inclined surface is formed on the pushing component for pushing the at least one driving component to rotate when the pushing component moves.
5. The stroller of claim 1, wherein the frame folding mechanism further comprises a recovering torsion spring disposed between the grip and the folding seat for folding the grip relative to the folding seat.
6. The stroller of claim 1, wherein a first abutting surface is formed on a top surface of the chamber, a second abutting surface is formed on a top surface of a protruding end of the at least one engaging component, and the first abutting surface abuts against the second abutting surface.
7. The stroller of claim 6, wherein a first curved surface is formed on an end of the at least one driving component, a second curved surface is formed on a bottom surface of a protruding end of the at least one engaging component, and the first curved surface abuts against the second curved surface.
8. The stroller of claim 1, wherein each of the two lateral frames comprises a handle, two upper ends of the two front feet are pivoted to two ends of the two handles, and two upper ends of the two rear feet are pivoted to the two handles.
9. The stroller of claim 8, further comprising at least one quick detachable assembly and a canopy installed on one of the two handles via the at least one quick detachable assembly.
10. The stroller of claim 9, wherein the at least one quick detachable assembly comprises: a connecting portion connected to the canopy; a fixing portion fixed on the one of the two handles where the canopy is installed; and an engaging hook, a middle portion of the engaging hook being pivoted to the fixing portion; wherein an engaging slot is formed on the one of the two handles where the canopy is installed, and an engaging end of the engaging hook engages with the engaging slot.
11. The stroller of claim 10, further comprising an engaging seat disposed on the one of the two handles where the canopy is installed, the engaging slot being formed on the engaging seat, and the fixing portion being slidably sleeved on the engaging seat.
12. The stroller of claim 10, wherein the at least one quick detachable assembly further comprises: a pressing portion disposed on the other end of the engaging hook; and a compressed spring disposed between the pressing portion and the fixing portion.
13. The stroller of claim 8, wherein one of the two lateral frames further comprises a folding hook fixed on the handle of the one of the two lateral frames, the folding hook comprises an engaging rib, a sliding slot is formed on the rear foot of the one of the two lateral frames, and when the stroller is folded completely, the two handles are adjacent to the two rear feet, and the engaging rib engages with the sliding slot for locking the stroller at a folding position.
14. The stroller of claim 13, further comprising: an engaging protrusion disposed on the folding hook; a cup holder; and an engaging portion disposed on the cup holder and cooperating with the engaging protrusion.
15. The stroller of claim 1, wherein the frame folding mechanism comprises: four bottom pipes radially disposed on the periphery the folding seat, ends of the four bottom pipes being pivoted to the folding seat, the other ends of the four bottom pipes being pivoted to the two front feet and the two rear feet of the two lateral frames respectively; two engaging components disposed on two opposite ends of the four bottom pipes pivoted to the folding seat; two recovering components disposed on the two opposite ends of the four bottom pipes pivoted to the folding seat, the two recovering components driving the two engaging components to stretch into the chamber; and two driving components pivoted to the folding seat, two ends of each of the two driving components abutting against the corresponding engaging component and the pushing component respectively; wherein when the grip rotates to drive the pushing component to move, the pushing component drives the two driving components to push the two engaging components to retract into the two corresponding bottom pipes, such that the four bottom pipes and the folding seat are released to be foldable.
16. The stroller of claim 15, further comprising two quick detachable assemblies and a canopy installed on the two handles via the two quick detachable assemblies.