Automatic folding stroller

Abstract

The present application discloses an automatically folding stroller for children, comprising a frame and a seat detachably mounted on the frame. The frame comprises two side frames arranged opposite to each other, each side frame comprising a front foot rod and a rear foot rod hinged to each other, an upper push handle rod and a lower push handle rod hinged to each other, the lower push handle rod also hinged to the rear foot rod, a side rod hinged between the upper push handle rod and the rear foot rod, the upper push handle rod, the side rod, the rear foot rod, and the lower push handle rod forming a first link mechanism that can switch between a folded state and an unfolded state; the seat comprises a seat plate and a backrest plate hinged to the seat plate, the backrest plate having a folded state and a riding state, the self-weight of the seat in the folded state can drive the unlocked first link mechanism to enter the folded state and keep the frame standing. The technical solution disclosed in the present application achieves automatic folding of the frame by optimizing the relationship between the frame rods, and can maintain the frame in a standing state after the folding action is completed, which provides a good user experience.

Description

Technical Field

[0001] The present application relates to the field of children's products, and in particular to an automatically folding children's stroller. Background Art

[0002] With the widespread use of strollers, people have higher and higher requirements for the functionality of strollers. Not only do they hope that strollers can keep babies safe during riding, but they also hope that strollers can make babies ride comfortably and be more convenient to operate.

[0003] For example, Chinese patent document CN109720395A discloses a baby carriage frame with one-button automatic folding function, wherein the front seat group includes a front seat rod rotatably connected to the front leg group, and the rear seat group includes a rear seat rod rotatably connected to the rear leg group, and a second elastic member is connected between the front seat rod and the rear seat rod.

[0004] Similar to the above technical solution, although the existing technology solves the problem of automatic folding, the body of the bicycle will tilt forward or backward during the folding process, and it is impossible to achieve automatic standing, which easily makes the cloth cover dirty. Summary of the Invention

[0005] In order to solve the above technical problems, the present application discloses an automatically folding child stroller, comprising a frame and a seat detachably mounted on the frame, the frame comprising two side frames arranged opposite to each other, each side frame comprising a front leg rod and a rear leg rod hinged to each other, an upper push handle rod and a lower push handle rod hinged to each other, the lower push handle rod being further hinged to the rear leg rod, a side rod being hinged between the upper push handle rod and the rear leg rod, the upper push handle rod, the side rods, the rear leg rod and the lower push handle rod constituting a first linkage mechanism switchable between a folded state and an unfolded state, the first linkage mechanism being provided with a first locking mechanism;

[0006] The seat includes a seat plate and a backrest plate hinged to the seat plate, the backrest plate has a folded state rotated to a preset angle relative to the seat plate and a relative sitting state, the self-weight of the seat in the folded state can drive the unlocked first link mechanism to enter the folded state and keep the frame standing, and during the process of the first link mechanism entering the folded state, the front foot rod and the rear foot rod move closer to each other to enable the frame to stand.

[0007] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution. They are merely further supplements or optimizations. Under the premise that there are no technical or logical contradictions, each optional method can be combined separately for the above-mentioned overall solution, or multiple optional methods can be combined.

[0008] Optionally, each of the vehicle side frames includes:

[0009] The front foot rod and the rear foot rod are hinged at their top ends and are respectively provided with front rollers and rear rollers at their bottom ends;

[0010] The upper push handle and the lower push handle, the middle portion of the lower push handle is hinged to the middle portion of the rear foot rod, and the bottom portion of the lower push handle extends beyond the rear foot rod toward the front foot rod;

[0011] The side rods are hinged at both ends to the upper push handle rod and the rear foot rod respectively;

[0012] A linkage rod, both ends of which are hinged to the bottom of the push-down handle rod and the middle of the front foot rod respectively;

[0013] The rear foot rod, the front foot rod, the push-down hand rod and the linkage rod constitute a second connecting rod mechanism.

[0014] Optionally, the front portion of the base is hinged to the front foot rod, the rear portion is hinged to the push handle rod, and the seat plate is rotatably connected to the base, so that the seat has two orientations.

[0015] Optionally, the seat has a seating space in a forward direction facing away from the vehicle frame and in a reverse direction facing the vehicle frame. In the unfolded state, the center of gravity of the seat in the forward direction is close to the hinge between the base and the push-down handle.

[0016] Optionally, in the unfolded state, the hinge between the base and the lower push handle and the hinge between the rear foot rod and the lower push handle are staggered in the direction of gravity.

[0017] Optionally, the base and the front leg rod are hinged to each other via a swing rod, and when the vehicle side frame enters the folded state from the unfolded state, the height of the hinge between the base and the swing rod in the direction of gravity remains basically unchanged.

[0018] Optionally, the first locking mechanism is used to keep the corresponding vehicle side frame in the unfolded state; in the folded state, the side rod of each vehicle side frame is abutted against the rear leg rod, and a vehicle side frame or the rear leg rod of each vehicle side frame is provided with a second locking mechanism that cooperates with the side rod, and the second locking mechanism is used to keep the corresponding vehicle side frame in the folded state.

[0019] Optionally, the second locking mechanism includes a locking tongue and a locking buckle that cooperate with each other, and the locking tongue and the locking buckle are provided with guiding structures that cooperate with each other; when the vehicle side frame enters the folding state, the side rod and the rear foot rod approach each other, and the locking tongue and the locking buckle are locked to each other through the guiding structure.

[0020] Optionally, in the folded state, each vehicle side frame is configured as follows:

[0021] The side rods and the front leg rod are respectively abutted against the rear leg rod from both sides;

[0022] The push handle, the side rod, the rear foot rod and the front foot rod are abutted in sequence;

[0023] The push-down handle bar, the side bar and the front foot bar are respectively pressed against the rear foot bar from three directions.

[0024] Optionally, a folding roller is provided at the top end of the push-down handle. In the folded state, the folding roller and the front roller are respectively located on both sides of the rear roller, and the rear roller and the front roller are able to stand or the rear roller and the folding roller are able to stand.

[0025] Optionally, the front roller is a universal wheel, and in the folded state, the center of gravity of the seat is located on the side of the rear roller facing the folding roller.

[0026] Optionally, the seat includes a folding bracket and a seat cover mounted on the folding bracket, the folding bracket includes two symmetrically arranged seat side frames, each seat side frame includes:

[0027] a seat plate, cooperating with the base;

[0028] a front seat rod, the lower end of which is hinged to the front side of the seat plate;

[0029] a recoil rod, the lower end of which is hinged to the rear side of the seat plate;

[0030] a first connecting rod, one end of which is hinged to the middle portion of the front seat rod, and the other end of which is hinged to the upper end of the rear seat rod;

[0031] A handlebar rod, the lower end of which is hinged to the upper end of the front seat rod;

[0032] a second connecting rod, one end of which is hinged to the upper end of the recoil rod and the other end of which is hinged to the lower end of the handlebar rod;

[0033] a backrest plate, the bottom of which is hinged to the rear side of the seat plate;

[0034] The seat plate, the front sitting rod, the first connecting rod and the rear sitting rod constitute a third connecting rod mechanism that can be deformed along with the folding bracket. The front sitting rod, the handlebar, the first connecting rod and the second connecting rod constitute a fourth connecting rod mechanism that can be deformed along with the folding bracket.

[0035] The technical solution disclosed in the present application realizes automatic folding of the frame by optimizing the relationship between the frame rods, and can maintain the frame in a standing state after the folding action is completed, which provides a good user experience.

[0036] The specific beneficial technical effects will be further explained in conjunction with specific structures or steps in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1a to Figure 1b Schematic diagram of different states of a child stroller in one embodiment;

[0038] Figures 2a to 2d Schematic diagram of different states of a child stroller seat in another embodiment;

[0039] Figure 3a to Figure 3b for Figures 2a to 2d Schematic diagram of the stroller folding process (backrest omitted);

[0040] Figure 4a Figure 4c is Figures 2a to 2d Schematic diagram of the stroller in folding state (backrest omitted);

[0041] Figure 5a and Figure 5b Schematic diagram of different states of the seat in one embodiment (backrest omitted).

[0042] The reference numerals in the figures are described as follows:

[0043] 1. Frame; 11. Side frame; 111. Upper handlebar; 112. Lower handlebar; 1121. Folding roller; 113. Sidebar; 114. Rear footbar; 1141. Rear roller; 115. Front footbar; 1151. Front roller; 116. Base; 117. Linking rod; 118. Swing lever; 12. Second locking mechanism; 121. Lock tongue; 122. Lock catch;

[0044] 2. Seat; 21. Seat plate; 22. Folding bracket; 221. Seat side frame; 222. Front seat rod; 2221. Lower joint seat; 223. Rear seat rod; 224. First connecting rod; 225. Handlebar rod; 2251. Extension portion; 2252. Upper joint seat; 226. Second connecting rod; 227. Rotating joint; 228. Backrest board; 23. Third locking mechanism. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be an intermediate component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be an intermediate component.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] In this field, pipes are used as rods for reasons such as reducing weight or having built-in pipelines. However, regardless of whether they are pipes or rods, the core purpose is to transmit torque and support the frame 1. Therefore, the rods in this article can also have multiple implementation forms, which are conducive to hollow pipes and other components that can support multi-directional torque and thus resist tension, compression, and bending.

[0049] At the same time, the hinges, rotational connections, etc. mentioned in this application are realized by common technical means in the field unless otherwise specified. For example, the components are stacked axially in sequence at the pivot position and rotated together through the pivot. The pivot can be a separate component or an integral structure with one of the components. Unless otherwise specified in this document, the concept of "front" should be understood as the positive direction of the stroller in the normal pushing direction and is not affected by the orientation of the seat. Similarly, the positive direction of the seat should be understood as the orientation of the seat being consistent with the normal pushing direction of the stroller.

[0050] Reference Attachment Figure 1a To the attached Figure 1b The present application discloses an automatically folding child stroller, comprising a frame 1 and a seat 2 detachably mounted on the frame 1. The frame 1 comprises two side frames 11 arranged opposite to each other, each side frame 11 comprising a front foot rod 115 and a rear foot rod 114 hinged to each other, an upper push handle rod 111 and a lower push handle rod 112 hinged to each other, the lower push handle rod 112 further hinged to the rear foot rod 114, a side rod 113 hinged between the upper push handle rod 111 and the rear foot rod 114, the upper push handle rod 112, the side rod 113, the rear foot rod 114 and the lower push handle rod 112 forming a first linkage mechanism switchable between a folded state and an unfolded state, the first linkage mechanism being further provided with a first locking mechanism (not shown).

[0051] The seat 2 includes a seat plate 21 and a backrest plate 228 hinged to the seat plate 21. The backrest plate 228 has a folded state in which it is rotated to a preset angle relative to the seat plate 21, and a relative sitting state. The self-gravity of the seat 2 in the folded state can drive the unlocked first link mechanism to enter the folded state and keep the frame 1 standing. During the process of the first link mechanism entering the folded state, the front foot rod 115 and the rear foot rod 114 move closer to each other to enable the frame 1 to stand.

[0052] Changes to the first linkage mechanism enable the vehicle side frames 11 to expand and fold in space. It's easy to understand that the two vehicle side frames 11 can move synchronously via the linkage to achieve spatial expansion and folding of the vehicle frame 1. The technical solution disclosed in this application optimizes the relationship between the frame members, achieving automatic folding of the vehicle frame 1 and maintaining it in an upright position after folding, providing easy operation and a pleasant user experience. Maintaining the frame 1 in an upright position should be understood as ensuring that the frame 1 maintains stable contact with the support surface, preventing falls, shaking, and other situations.

[0053] In the illustrated embodiment, the gravity of the seat 2 acts on the push-down handle 112 , and the movement of the push-down handle 112 can achieve the overall change of the first link mechanism, thereby achieving the overall folding of the vehicle side frame 11 .

[0054] The folding state of the seat 2 can be configured differently depending on the relationship between the frame members. For example, in the embodiment shown in the accompanying drawings, the backrest 228 moves toward the seat panel 21 to enter the folded state; in another embodiment, the backrest 228 moves away from the seat panel 21 to enter the folded state. In principle, the backrest 228 moves relative to the seat panel 21 to form a spatial structure and a seating space, which should be understood as the seating state. The folding state should be understood as the backrest 228 moving relative to the seat panel 21 to disrupt the three-dimensional seating space, thus achieving a more regular folding effect.

[0055] The first link mechanism realizes the state switching of the vehicle side frame 11 body. Other rods can also be set on the vehicle frame 1. In order to synchronize the movement of each rod, a corresponding transmission mechanism can be set. Referring to one embodiment, each vehicle side frame 11 includes:

[0056] The front foot rod 115 and the rear foot rod 114 are hinged at their top ends and are respectively provided with a front roller 1151 and a rear roller 1141 at their bottom ends;

[0057] An upper push handle 111 and a lower push handle 112, wherein the middle portion of the lower push handle 112 is hinged to the middle portion of the rear foot rod 114, and the bottom portion of the lower push handle 112 extends over the rear foot rod 114 toward the front foot rod 115;

[0058] The side rod 113 has two ends hinged to the upper push handle rod 111 and the rear foot rod 114 respectively;

[0059] The base 116 is used to install the seat 2 and has two ends hinged to the push handle 112 and the front foot rod 115 respectively;

[0060] The linkage rod 117 has two ends hinged to the bottom of the push handle 112 and the middle of the front foot rod 115 respectively;

[0061] The rear foot rod 114, the front foot rod 115, the push-down handle rod 112 and the linkage rod 117 constitute a second connecting rod mechanism;

[0062] In the unfolded state, the center of gravity of the seat 2 is close to the hinge between the base 116 and the push-down handle 112.

[0063] The second link mechanism is used to realize the linkage between the front foot rod 115 and the first link mechanism, wherein the first link mechanism and the second link mechanism share the rear foot rod 114, so the two link mechanisms can easily realize linkage.

[0064] In terms of base drive, the front portion of the base 116 is hinged to the front foot rod 115, and the rear portion is hinged to the push handle 112. The seat plate 21 is rotatably connected to the base 116, allowing the seat to have two orientations. As is readily understood, the seat has a forward orientation with the seating space facing away from the vehicle frame and a reverse orientation facing the vehicle frame. In the unfolded state, the center of gravity of the forward-facing seat is close to the hinge between the base and the push handle.

[0065] As shown in the accompanying drawings, the two ends of the base 116 are respectively hinged to the push handle 112 and the front foot rod 115. In order to better realize the driving of the first link mechanism by the gravity of the seat 2, this embodiment is achieved by setting the center of gravity of the seat 2. In actual products, the center of gravity setting of the seat 2 can be achieved by setting components, such as setting the backrest board 228 and the rod of the seat 2 on the side of the seat 2 close to the push handle 112. Figure 2b and attached Figure 2d The seat 2 in this application can also be reversed, and the center of gravity of the seat 2 after the reversal will change, thereby providing a structural basis for other functions. Figure 2d In the embodiment, after the seat 2 is reversed, the center of gravity is close to the hinge between the base 116 and the front leg rod 115. At this time, the gravity of the seat 2 can drive the unlocked first link mechanism to enter the deployed state, thereby maintaining stability.

[0066] The key point of this application is that when the seat 2 is in the forward position, the first link mechanism can be folded by gravity, so the gravity setting is very critical. Referring to one embodiment, in the unfolded state, the hinge between the base 116 and the lower push handle 112 and the hinge between the rear foot rod 114 and the lower push handle 112 are staggered in the direction of gravity.

[0067] The staggered hinges can realize torque. This is reflected in the push handle 112. The hinge between the base 116 and the push handle 112 is subjected to a vertical downward driving force due to the gravity of the seat 2. The hinge between the rear foot rod 114 and the push handle 112 is relatively stable due to the support of the rear foot rod 114 and the front foot rod 115. Therefore, the push handle 112 will generate a torque. Figure 1b The movement trend of clockwise rotation in the middle realizes the folding of the first connecting rod mechanism. The distance between the hinge between the base 116 and the lower push handle 112 and the hinge between the rear foot rod 114 and the lower push handle 112 is the driving force arm length, and the specific length can be adjusted according to the specific proportion of the frame 1.

[0068] As described above, the driving effect brought by the gravity of the seat 2 is multi-dimensional. For example, the gravity of the seat 2 at the hinge between the base 116 and the push handle 112 can drive the first link mechanism into the folded state, and the gravity of the seat 2 at the hinge between the base 116 and the front leg rod 115 can cause the front leg rod 115 and the rear leg rod 114 to move away from each other, that is, to keep the first link mechanism in the unfolded state. In addition to the technical route of avoiding this problem by setting the center of gravity as described above, you can also refer to the attached Figure 2a In the disclosed embodiment, the base 116 and the front leg rod 115 are hinged to each other via a swing rod 118. When the vehicle side frame 11 changes from the unfolded state to the folded state, the height of the hinge between the base 116 and the swing rod 118 in the direction of gravity remains basically unchanged.

[0069] When the vehicle frame 1 is maintained in the unfolded state, the rear end of the base 116 is positioned relative to the lower push handle 112, and the swing arm 118 has a stable spatial position, thereby achieving stability of the base 116. When the vehicle frame 1 enters the folded state from the unfolded state, the swing arm 118 can release the motion stroke between the front leg rod 115 and the push handle by its own movement. From the actual working effect, due to the setting of the swing arm 118, the front end of the base 116 can remain basically unchanged in the height in the direction of gravity, avoiding the gravity work applied by the seat 2 at this point, thereby avoiding the torque effect of the gravity of the seat 2 that keeps the vehicle frame 1 in the unfolded state. The setting of the center of gravity of the coordinated seat 2 close to the rear end of the base 116 can achieve automatic folding of the vehicle frame 1.

[0070] With respect to maintaining the vehicle frame 1 in various states, referring to one embodiment, a first locking mechanism is used to maintain the corresponding vehicle side frame 11 in the unfolded state; in the folded state, the side rod 113 of each vehicle side frame 11 is abutted against the rear foot rod 114, and a vehicle side frame 11 or the rear foot rod 114 of each vehicle side frame 11 is provided with a second locking mechanism 12 that cooperates with the side rod 113, and the second locking mechanism 12 is used to maintain the corresponding vehicle side frame 11 in the folded state.

[0071] The first locking mechanism can stabilize the frame 1 in the unfolded state, so that children can sit comfortably and users can push the bicycle. The second locking mechanism 12 can stabilize the frame 1 in the folded state, so that users can easily carry and store the automatically folded frame 1.

[0072] The second locking mechanism 12 can be configured as a standalone locking mechanism or as an automatically locking mechanism to further enhance the convenience of automatic folding. In one embodiment, the second locking mechanism 12 includes a locking tongue 121 and a locking catch 122 that cooperate with each other. The locking tongue 121 and the locking catch 122 are provided with cooperating guide structures. When the side frame 11 enters the folded state, the side rod 113 and the rear leg rod 114 approach each other, and the locking tongue 121 and the locking catch 122 are locked together via the guide structure.

[0073] In a specific product, the lock tongue 121 is configured as an elastic component that can be deformed under the action of the guide structure to avoid the lock buckle 122 from locking. The lock release process can release the lock buckle 122 through the deformation of the lock tongue 121.

[0074] Regarding the specific configuration of the vehicle frame 1 in the folded state, referring to one embodiment, in the folded state, each vehicle side frame 11 is configured as follows:

[0075] The side bars 113 and the front foot bars 115 are respectively abutted against the rear foot bars 114 from both sides;

[0076] The upper push handle 111, the side rod 113, the rear foot rod 114 and the front foot rod 115 are abutted in sequence;

[0077] The push-down handle bar 112 , the side bar 113 and the front foot bar 115 are respectively pressed against the rear foot bar 114 from three directions.

[0078] The sequential alignment of the rods optimizes the overall appearance and volume of the folded frame 1, facilitating storage and transportation. Notably, the rods on the side frames 11 do not need to be coplanar, thereby avoiding spatial interference between the rods. For example, in this embodiment, the push-down handle 112, side rod 113, and front leg rod 115 abut against the rear leg rod 114 from three different directions, representing three non-intersecting spatial surfaces of the rear leg rod 114. This arrangement fully utilizes the interrelationships between the rods to achieve a more optimal storage volume.

[0079] With regard to the realization of the standing state of the frame 1 in the folded state, referring to one embodiment, a folding roller 1121 is provided at the top end of the push-down handle 112. In the folded state, the folding roller 1121 and the front roller 1151 are respectively located on both sides of the rear roller 1141. The rear roller 1141 and the front roller 1151 realize standing or the rear roller 1141 and the folding roller 1121 realize standing.

[0080] The rear roller 1141 and the front roller 1151 can realize a set of support structures, and the rear roller 1141 and the folding roller 1121 can also realize a set of support structures. The setting method in this embodiment provides a structural basis for the frame 1 to automatically stand after folding, and can flexibly set the rod relationship of the frame 1 according to different situations.

[0081] Referring to one embodiment, the front roller 1151 is a universal wheel. In the folded state, the center of gravity of the seat 2 is located on the side of the rear roller 1141 facing the folding roller.

[0082] When front rollers 1151 are universal wheels or front leg rods 115 are short, the folded frame 1 cannot achieve stable standing using the front rollers 1151 and rear rollers 1141. This embodiment ensures that the folded frame 1 achieves stable standing using the rear rollers 1141 and the folding rollers by positioning the center of gravity of the seat 2. In particular, during the automatic folding process, the frame 1 may experience disturbances due to the movement of its rods. The positioning of the center of gravity of the seat 2 effectively curbs this tendency, ensuring stable automatic folding of the frame 1.

[0083] refer to Figure 5a to Figure 5b In one embodiment, the seat 2 includes a folding bracket 22 and a seat cover mounted on the folding bracket 22. The folding bracket 22 includes two symmetrically arranged seat side frames 221. Each seat side frame 221 includes:

[0084] Seat plate 21, mating with base 116;

[0085] A front seat rod 222, the lower end of which is hinged to the front side of the seat plate 21;

[0086] A rear seat rod 223, the lower end of which is hinged to the rear side of the seat plate 21;

[0087] A first connecting rod 224 has one end hinged to the middle portion of the front seat rod 222 and the other end hinged to the upper end of the rear seat rod 223;

[0088] The handlebar rod 225 has its lower end hinged to the upper end of the front seat rod 222;

[0089] A second connecting rod 226 has one end hinged to the upper end of the recoil rod 223 and the other end hinged to the lower end of the handlebar rod 225;

[0090] The backrest plate 228 has a bottom hinged to the rear side of the seat plate 21;

[0091] The seat plate 21 , the front seat rod 222 , the first link 224 and the rear seat rod 223 constitute a third link mechanism that can be deformed along with the folding bracket 22 . The front seat rod 222 , the handlebar 225 , the first link 224 and the second link 226 constitute a fourth link mechanism that can be deformed along with the folding bracket 22 .

[0092] The third and fourth linkages share the same structure as the first link 224 and the front seat link 222. Therefore, changes in the third linkage's spatial configuration are synchronized with those of the fourth linkage, enabling the folding and unfolding of the seat 2. The front seat link 222 and the rear seat link 223 are articulated with the seat pan 21 using off-axis hinges. Specifically, a first hinge point and a second hinge point are provided at different locations on a single side of the seat pan 21. The lower end of the front seat link 222 is articulated to the first hinge point, while the lower end of the rear seat link 223 is articulated to the second hinge point.

[0093] The seat plate 21 is used to realize the front and rear rotation of the seat 2 relative to the frame 1. The folding bracket 22 serves as a skeleton, mainly used to support the cloth cover and the awning, and has two states: folded and unfolded.

[0094] In one embodiment, the first connecting rod 224 , the upper end of the rear seat rod 223 and the second connecting rod 226 are coaxially hinged; the handlebar rod 225 is provided with an extension portion 2251 extending toward the front seat rod 222 , and the second connecting rod 226 is hinged to the handlebar rod 225 via the extension portion 2251 .

[0095] Since the two linkage mechanisms share the first link 224, the first link 224 is connected to the two components. To simplify the structure and facilitate assembly, a coaxial hinge is used in this embodiment. The arrangement order of the specific components can be adjusted according to the folding requirements of the folding bracket 22.

[0096] The extension portion 2251 is actually a part of the handlebar rod 225 . To avoid a gap between hands, in one embodiment, when the folding bracket 22 is in the unfolded state, the extension portion 2251 is in contact with the front seat rod 222 .

[0097] Regarding the matching relationship between the rods, in one embodiment, when the folding bracket 22 is in the folded state, the handlebar rod 225 and the rear seat rod 223 are respectively abutted against two sides of the front seat rod 222 .

[0098] The above-mentioned folding state can achieve a more regular folding performance, which is convenient for users to use in different situations.

[0099] The hinged connection between the rods can be achieved by a simple rotating shaft or by providing a rotating joint 227. In one embodiment, an upper joint seat 2252 is provided at the bottom of the handlebar rod 225, and a lower joint seat 2221 is provided at the top of the front seat rod 222. The upper joint seat 2252 and the lower joint seat 2221 interlock with each other around the first rotation axis to form the rotating joint 227. A third locking mechanism 23 is provided within the rotating joint 227 to constrain the rotation of the two.

[0100] In this embodiment, the rotating joint 227 realizes the articulation of the side rod 113 and the front leg rod 115. The advantage of the joint seat is that it can avoid the occurrence of a hand-clamping gap and can accommodate more components, such as the third locking mechanism 23. To prevent the large joint seat from affecting the kinematic relationship of the rods, in one embodiment, the extension path of the second connecting rod 226 is a curve. When the folding bracket 22 is in the folded state, the second connecting rod 226 is in contact with the outer peripheral surface of the rotating joint 227. The configuration of the second connecting rod 226 as an arc rod also helps the folding effect of the folding bracket 22 to a certain extent, and can obtain a more regular folding appearance.

[0101] refer to Figure 1a As shown in FIG4c , the present application further discloses a method for automatically folding a child stroller, comprising:

[0102] unlocking the first locking mechanism;

[0103] The rear end of the base 116 tends to move downward in the direction of gravity under the action of the weight of the seat 2 until the side rods 113 and the rear leg rods 114 of each frame 1 abut against each other, and the frame 1 in the folded state stands on its own in any of the following ways:

[0104] By the front roller 1151 at the bottom of the front foot rod 115 and the rear roller 1141 at the bottom of the rear foot rod 114 abutting against the support surface; or

[0105] The rear roller 1141 at the bottom of the rear foot rod 114 and the folding roller 1121 at the top of the push-down handle rod 112 are pressed against the support surface.

[0106] This method can be implemented by the automatically folding stroller in the above technical solution. The unfolding process can be performed in the reverse order, which will not be described in detail here.

[0107] The technical features of the above-described embodiments may be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as no contradiction exists between these combinations of technical features, they should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be deemed that the drawing also discloses examples of combinations of the various embodiments involved.

[0108] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present application, and such modifications and improvements are all within the scope of protection of the present application.

Claims

1. An automatically folding stroller for children, comprising a frame and a seat detachably mounted on the frame, wherein the frame comprises two oppositely disposed side frames, and wherein: The folding mechanism is a series of steps which are connected to the front and rear legs of the vehicle and are pivotally connected to the chassis at the bottom and the bottom of the chassis at the bottom. The folding mechanism is a series of steps which are connected to the chassis at the bottom and the bottom of the chassis at the bottom. The folding mechanism is a series of steps which are connected to the chassis at the bottom and the bottom of the chassis at the bottom. The seat comprises a seat plate connected to the base and a backrest plate hinged to the seat plate, the backrest plate having a folded state that can be rotated to a preset angle relative to the seat plate and a relative sitting state, the seat having a sitting space facing away from the vehicle frame in a forward direction and a sitting space facing the vehicle frame in a reverse direction; when the seat is in the forward direction, the self-weight of the seat in the folded state can drive the unlocked first link mechanism to enter the folded state and keep the vehicle frame standing; when the first link mechanism enters the folded state, the front leg rod and the rear leg rod move closer to each other to achieve the standing state of the vehicle frame; In the unfolded state, the center of gravity of the forward-facing seat is close to the hinge between the base and the push-down handle, and the center of gravity of the reverse-facing seat is close to the hinge between the base and the front foot rod, so that the front foot rod and the rear foot rod tend to move apart from each other and the first connecting rod mechanism is maintained in the unfolded state.

2. The automatically folding stroller according to claim 1, characterized in that: The top ends of the front foot rod and the rear foot rod are hinged to each other, and the bottom ends of the front foot rod and the rear foot rod are respectively provided with a front roller and a rear roller.

3. The automatically folding stroller according to claim 2, characterized in that: A folding roller is provided at the top end of the push-down handle. In the folded state, the folding roller and the front roller are respectively located on both sides of the rear roller, and the rear roller and the front roller stand up or the rear roller and the folding roller stand up.

4. The automatically folding stroller according to claim 3, characterized in that: The front roller is a universal wheel. In the folded state, the center of gravity of the seat is located on the side of the rear roller facing the folding roller.

5. The automatically folding stroller according to claim 1, characterized in that: In the unfolded state, the hinge between the base and the lower push handle and the hinge between the rear leg rod and the lower push handle are staggered in the direction of gravity.

6. The automatically folding stroller according to claim 1, characterized in that: When the vehicle side frame enters the folded state from the unfolded state, the height of the hinge point between the base and the swing rod in the direction of gravity remains substantially unchanged.

7. The automatically folding stroller according to claim 1, characterized in that: The seat comprises a folding bracket and a seat cover mounted on the folding bracket, wherein the folding bracket comprises two symmetrically arranged seat side frames, each seat side frame comprising: a seat plate, cooperating with the base; a front seat rod, the lower end of which is hinged to the front side of the seat plate; a recoil rod, the lower end of which is hinged to the rear side of the seat plate; a first connecting rod, one end of which is hinged to the middle portion of the front seat rod, and the other end of which is hinged to the upper end of the rear seat rod; A handlebar rod, the lower end of which is hinged to the upper end of the front seat rod; a second connecting rod, one end of which is hinged to the upper end of the recoil rod and the other end of which is hinged to the lower end of the handlebar rod; a backrest plate, the bottom of which is hinged to the rear side of the seat plate; The seat plate, the front sitting rod, the first connecting rod and the rear sitting rod constitute a third connecting rod mechanism that can be deformed along with the folding bracket. The front sitting rod, the handlebar, the first connecting rod and the second connecting rod constitute a fourth connecting rod mechanism that can be deformed along with the folding bracket.

8. The automatically folding stroller according to claim 1, characterized in that: The first locking mechanism is used to maintain the corresponding vehicle side frame in the unfolded state; in the folded state, the side rod of each vehicle side frame is in contact with the rear leg rod, and a second locking mechanism cooperating with the side rod is provided on the rear leg rod of one or each vehicle side frame, and the second locking mechanism is used to maintain the corresponding vehicle side frame in the folded state; The second locking mechanism includes a locking tongue and a locking buckle that cooperate with each other, and the locking tongue and the locking buckle are provided with guiding structures that cooperate with each other; when the vehicle side frame enters the folding state, the side rod and the rear leg rod approach each other, and the locking tongue and the locking buckle are locked with each other through the guiding structure.

9. The automatically folding stroller according to claim 1, characterized in that: In the folded state, the side frames of each vehicle are set as follows: The side rods and the front leg rod are respectively abutted against the rear leg rod from both sides; The push handle, the side rod, the rear foot rod and the front foot rod are abutted in sequence; The push-down handle bar, the side bar and the front foot bar are respectively pressed against the rear foot bar from three directions.

Images