CN215971711U - Automatic folding children's cart - Google Patents

Abstract

The application discloses an automatically-folded children stroller, which comprises a frame and a seat detachably mounted on the frame, wherein the frame comprises two oppositely-arranged side frames, each side frame comprises a front foot bar and a rear foot bar which are hinged with each other, an upper push hand bar and a lower push hand bar which are hinged with each other, the lower push hand bar is also hinged with the rear foot bar, a side bar is hinged between the upper push hand bar and the rear foot bar, and the upper push hand bar, the side bar, the rear foot bar and the lower push hand bar form a first connecting rod mechanism capable of being switched between a folded state and an unfolded state; the seat comprises a seat board and a back board hinged with the seat board, the back board has a folding state and a sitting state, and the self gravity of the seat in the folding state can drive the first link mechanism of the release lock to enter the folding state and keep the frame standing. The technical scheme disclosed in the application optimizes the relation of the frame rods, realizes automatic folding of the frame, can keep in a standing state after the folding action is completed, and is good for users to feel.

Description

Automatic folding children's cart

Technical Field

The application relates to the field of children products, in particular to an automatically folded children stroller.

Background

With the wide use of the stroller, the functional requirements of people on the stroller are higher and higher. Not only hope children's shallow can make the baby safe at the in-process of taking, hope children's shallow simultaneously and enable the baby to take comfortable and agreeing, it is more convenient in the operation use.

For example, chinese patent publication No. CN109720395A discloses a stroller frame for a one-key automatic folding stroller, wherein a front seat rod is rotatably connected to a front leg assembly at the front of a seat assembly, a rear seat rod is rotatably connected to a rear leg assembly at the rear of the seat assembly, and a second elastic member is connected between the front seat rod and the rear seat rod.

Similar with above-mentioned technical scheme, automatic folding problem has been solved to prior art, but folding in-process automobile body can be forward or toppled over backward, can't realize automatic standing, makes dirty with the cloth cover easily.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application discloses an automatic folding stroller, including frame and demountable installation seat on the frame, the frame is including the relative two car side bearer that set up, and each car side bearer all includes mutual articulated preceding foot bar and back foot bar, mutual articulated push-up hand lever and push-down hand lever, push-down hand lever still articulates in back foot bar, push-up hand lever with it has the side lever to articulate between the back foot bar, push-up hand lever, side lever, back foot bar and push-down hand lever constitute the first link mechanism that can switch between fold condition and expansion state, first link mechanism disposes first locking mechanism;

the seat includes bedplate and articulated back board with the bedplate, the back board have for the bedplate rotates to the folding state and the relative state of taking of presetting the angle, and the self gravity of the seat under the folding state can drive the lock release first link mechanism gets into fold condition and keep the frame stands, first link mechanism gets into fold condition in-process, preceding foot bar with back foot bar draws close each other in order to realize the frame stands.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, each of the side frames includes:

the top ends of the front foot rod and the rear foot rod are hinged with 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;

the middle part of the lower push hand rod is hinged with the middle part of the rear foot rod, and the bottom of the lower push hand rod extends to the front foot rod beyond the rear foot rod;

the two ends of the side rod are respectively hinged with the upper push handle rod and the rear foot rod;

two ends of the linkage rod are respectively hinged with the bottom of the lower push handle rod and the middle of the front foot rod;

the rear foot rod, the front foot rod, the lower push hand rod and the linkage rod form a second connecting rod mechanism.

Optionally, the front part of the base is hinged with the front foot rod, the rear part of the base is hinged with the lower push handle rod, and the seat board is rotatably connected with the base, so that the seat has two orientations.

Optionally, the seat has a forward direction facing away from the frame and a reverse direction facing toward the frame, and in the unfolded state, the center of gravity of the seat in the forward direction is close to the hinge joint between the base and the lower push rod.

Optionally, in the unfolded state, the hinged position between the base and the lower pushing hand lever and the hinged position between the rear foot lever and the lower pushing hand lever are arranged in a staggered manner in the gravity direction.

Optionally, the base and the front foot bar are hinged to each other through a swing rod, and when the side frame enters the folded state from the unfolded state, the height of the hinged position of the base and the swing rod in the gravity direction is basically kept unchanged.

Optionally, the first locking mechanism is used for keeping the corresponding vehicle side frame in the unfolded state; under the folded state, the side lever of each side frame paste lean on in back foot bar, a side frame or each side frame be equipped with on the back foot bar with side lever complex second locking mechanical system, second locking mechanical system is used for keeping the car side frame that corresponds at folded state.

Optionally, the second locking mechanism includes a lock tongue and a lock catch which are matched with each other, and guide structures which are matched with each other are arranged on the lock tongue and the lock catch; when the side frame enters a folded state, the side rods and the rear foot rods are close to each other, and the lock tongue and the lock catch are locked with each other through the guide structure.

Optionally, in a folded state, each car side frame is arranged as follows:

the side rods and the front foot rods are respectively attached to the rear foot rods from two sides;

the push-up handspike, the side rods, the rear foot rods and the front foot rods are sequentially attached;

the lower push hand rod, the side rods and the front foot rod are respectively attached to the rear foot rod from three directions.

Optionally, the top of push down the handspike is provided with the gyro wheel of folding up, under fold condition, fold up the gyro wheel with preceding gyro wheel is located respectively the both sides of back gyro wheel, the back gyro wheel with preceding gyro wheel is realized standing or the back gyro wheel with fold up the gyro wheel and realize standing.

Optionally, the front roller is a universal wheel, and in a folded state, the center of gravity of the seat is located on one side of the rear roller, which faces the folding roller.

Optionally, the seat comprises a folding bracket and a seat cover mounted on the folding bracket, the folding bracket comprises two seat side frames arranged symmetrically, and each seat side frame comprises:

a seat plate cooperating with the base;

the lower end of the front seat rod is hinged with the front side of the seat plate;

the lower end of the backseat rod is hinged with the rear side of the seat plate;

one end of the first connecting rod is hinged with the middle part of the front seat rod, and the other end of the first connecting rod is hinged with the upper end of the rear seat rod;

the lower end of the handle rod is hinged with the upper end of the front seat rod;

one end of the second connecting rod is hinged with the upper end of the backseat rod, and the other end of the second connecting rod is hinged with the lower end of the handle rod;

the bottom of the backrest plate is hinged with the rear side of the seat plate;

the seat board the front seat rod, first connecting rod and the back seat rod constitute and can follow the third link mechanism of folding support deformation, the front seat rod the handle pole first connecting rod and the second connecting rod constitute and can follow the fourth link mechanism of folding support deformation.

The technical scheme disclosed in the application optimizes the relation of the frame rods, realizes automatic folding of the frame, can keep in a standing state after the folding action is completed, and is good for users to feel.

Specific advantageous technical effects will be further explained in conjunction with specific structures or steps in the detailed description.

Drawings

Fig. 1a to 1b are schematic views illustrating different states of a stroller according to an embodiment;

FIGS. 2 a-2 d are schematic views of another embodiment of a stroller seat in different states;

fig. 3a to 3b are schematic views illustrating a folding process of the stroller in fig. 2a to 2d (omitting the backrest plate);

fig. 4a to 4c are schematic views of the folding process of the stroller in fig. 2a to 2d (the backrest plate is omitted);

fig. 5a and 5b are schematic views of different states of the seat (the backrest plate is omitted) in one embodiment.

The reference numerals in the figures are illustrated as follows:

1. a frame; 11. a vehicle side frame; 111. pushing up the hand lever; 112. pushing down the hand lever; 1121. folding the roller; 113. A side lever; 114. a rear foot bar; 1141. a rear roller; 115. a front foot bar; 1151. a front roller; 116. a base; 117. a linkage rod; 118. a swing lever; 12. a second locking mechanism; 121. a latch bolt; 122. locking;

2. a seat; 21. a seat plate; 22. folding the bracket; 221. a seat side frame; 222. a front seat post; 2221. a lower joint seat; 223. a recoil rod; 224. a first link; 225. a handle bar; 2251. an extension; 2252. an upper joint seat; 226. a second link; 227. a revolute joint; 228. a back board; 23. a third locking mechanism.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the art, the rod is made of a pipe for reducing weight or building a pipeline, but the core purpose of the rod is to transmit torque and support the relationship of the frame 1, so that the rod in the present disclosure can have various implementation forms, and components such as a hollow pipe and the like capable of supporting multidirectional torque so as to resist tension, compression and bending are facilitated.

Meanwhile, the hinge, the rotational connection, and the like mentioned in the present application are realized by means of a common technical means in the art without being particularly described, for example, the components are stacked in sequence in the axial direction at the position of the pivot shaft and are rotationally matched by the pivot shaft, and the pivot shaft may be a separate component or may be an integral structure with one of the components. Without specific emphasis, the foregoing concepts should be understood as the positive direction of the stroller in the normal pushing direction, and not being affected by the orientation of the seat. Similarly, a forward seat orientation is understood to mean that the seat is oriented in the same direction as the normal direction of travel of the stroller.

Referring to fig. 1a to 1b, the present application discloses an automatically foldable stroller, which includes a frame 1 and a seat 2 detachably mounted on the frame 1, the frame 1 includes two opposing side frames 11, each side frame 11 includes a front leg 115 and a rear leg 114 hinged to each other, an upper push rod 111 and a lower push rod 112 hinged to each other, the lower push rod 112 is further hinged to the rear leg 114, a side rod 113 is hinged between the upper push rod 111 and the rear leg 114, the upper push rod 112, the side rod 113, the rear leg 114 and the lower push rod 112 form a first link mechanism switchable between a folded state and an unfolded state, and the first link mechanism is configured with a first locking mechanism (not shown);

the seat 2 comprises a seat plate 21 and a back plate 228 hinged with the seat plate 21, the back plate 228 has a folding state and an opposite sitting state, the folding state is rotated to a preset angle relative to the seat plate 21, the self-gravity of the seat 2 in the folding state can drive the first linkage mechanism of the release lock to enter the folding state and keep the frame 1 standing, and during the first linkage mechanism enters the folding state, the front foot rod 115 and the rear foot rod 114 are mutually close to realize the standing of the frame 1.

The variation of the first link mechanism enables the spatial expansion and folding of the side frame 11. It will be appreciated that the side frames 11 can be moved synchronously by the connecting rods to achieve the spatial deployment and folding of the frame 1. According to the technical scheme disclosed by the application, the automatic folding of the frame 1 is realized through the relation optimization of the base 116, the frame can be kept in a standing state after the folding action is completed, the operation is convenient, and the user feels good. Keeping the frame 1 standing should be understood as the frame 1 being able to achieve a stable contact with the support surface avoiding falling, shaking etc.

In the illustrated embodiment, the gravity of the seat 2 acts on the lower push lever 112, and the movement of the lower push lever 112 enables the overall change of the first link mechanism, thereby achieving the overall folding of the side frame 11.

The folding state of the seat 2 has different settings according to the variation of the frame rod relationship, for example, in the embodiment shown in the drawings, the backrest plate 228 is drawn toward the seat plate 21 to enter the folding state; in another embodiment, the back board 228 is moved away from the seat board 21 to be folded. In principle, the back board 228 is moved relative to the seat board 21 to form a space structure to form a seating space, and the seating state is understood; when the back board 228 moves relative to the seat board 21 to destroy the three-dimensional structure of the seating space, it should be understood as a folding state to achieve a more regular folding effect.

The first connecting rod mechanism realizes the state switching of the main body of the side frame 11, and other rod pieces can be arranged on the frame 1. In order to achieve a synchronous movement of the individual rods, a corresponding transmission can be provided. Referring to an embodiment, each of the side frames 11 includes:

the top ends of the front foot rod 115 and the rear foot rod 114 are hinged with each other, and the bottom ends of the front foot rod and the rear foot rod are respectively provided with a front roller 1151 and a rear roller 1141;

an upper push hand rod 111 and a lower push hand rod 112, wherein the middle part of the lower push hand rod 112 is hinged with the middle part of the rear foot rod 114, and the bottom of the lower push hand rod 112 extends to the front foot rod 115 beyond the rear foot rod 114;

the two ends of the side rod 113 are respectively hinged with the upper pushing handle rod 111 and the rear foot rod 114;

a base 116 for mounting the seat 2 and having two ends respectively hinged to the lower push rod 112 and the front foot rod 115;

two ends of the linkage rod 117 are respectively hinged with the bottom of the lower push handle rod 112 and the middle part of the front foot rod 115;

the rear foot rod 114, the front foot rod 115, the lower push hand rod 112 and the linkage rod 117 form a second link mechanism;

in the deployed state, the center of gravity of the seat 2 is located near the hinge between the base 116 and the lower push lever 112.

The second link mechanism is used to realize the linkage of the front leg bar 115 and the first link mechanism, wherein the first link mechanism and the second link mechanism share the rear leg bar 114, so that the two link mechanisms can easily realize the linkage.

In the implementation of the base drive, the front part of the base 116 is hinged with the front foot bar 115, the rear part is hinged with the lower handspike 112, and the seat plate 21 is rotatably connected with the base 116, so that the seat has two orientations. It will be appreciated that the seat has a forward direction with a seating space facing away from the frame and a reverse direction towards the frame, and that in the deployed state the centre of gravity of the seat in the forward direction is located close to the hinge between the base and the push down lever.

Referring to the drawings, the two ends of the base 116 are respectively hinged and connected with the lower push handle bar 112 and the front foot bar 115, and in order to better realize the driving of the first linkage mechanism by the weight of the seat 2, the driving is realized by the gravity center arrangement of the seat 2 in the embodiment. In an actual product, the center of gravity of the seat 2 may be set by setting components, such as the back board 228 and the lever of the seat 2 on the side of the seat 2 close to the lower push lever 112. Referring to fig. 2b and 2d, the seat 2 of the present application can also be reversed, and the center of gravity of the seat 2 after the reversal can be changed, thereby providing a structural basis for other functions. For example, in figure 2d, the seat 2 is shifted rearward with the center of gravity near the hinge between the base 116 and the front leg 115, where the weight of the seat 2 can drive the unlocked first linkage into the deployed state, thereby maintaining stability.

The key point of this application is when seat 2 is forward, can realize through self gravity that first link mechanism gets into fold condition, therefore the setting of gravity is very crucial. In one embodiment, the hinge between the base 116 and the lower handspike 112 and the hinge between the rear foot bar 114 and the lower handspike 112 are offset in the direction of gravity in the unfolded state.

The hinge joint arranged in a staggered way can realize torque. Embodied on the lower handspike 112, the hinge joint between the base 116 and the lower handspike 112 receives a vertical downward driving force due to the gravity of the seat 2, the hinge joint between the rear foot bar 114 and the lower handspike 112 is relatively stable due to the support of the rear foot bar 114 and the front foot bar 115, so that the lower handspike 112 will generate a movement trend of clockwise rotation in fig. 1b, thereby realizing the folding of the first link mechanism, the distance between the hinge joint between the base 116 and the lower handspike 112 and the hinge joint between the rear foot bar 114 and the lower handspike 112 is the length of the driving force arm, and the specific length can be adjusted according to the specific proportion of the frame 1.

As described above, the driving effect of the weight of the seat 2 is multidimensional, for example, the weight of the seat 2 at the hinge between the base 116 and the lower handspike 112 can drive the first link mechanism into the folded state, and the weight of the seat 2 at the hinge between the base 116 and the front foot bar 115 can cause the front foot bar 115 and the rear foot bar 114 to have a tendency to move away from each other, i.e., maintain the first link mechanism in the unfolded state. In addition to the technical approach of avoiding the problem by the center of gravity being set as described above, the base 116 and the front leg link 115 are hinged to each other by the swing link 118 in the embodiment disclosed in fig. 2a, and the height of the hinge of the base 116 and the swing link 118 in the direction of gravity is substantially constant when the side frame 11 is brought from the unfolded state to the folded state.

When the frame 1 is kept in the unfolded state, the rear end of the base 116 is positioned with the lower push lever 112, and the swing lever 118 has a stable spatial position, thereby achieving the stability of the base 116; when the frame 1 is brought from the unfolded state to the folded state, the swing lever 118 can release the movement stroke between the front foot bar 115 and the push lever by its own movement. From the practical working effect, because of the arrangement of the swing rod 118, the height of the front end of the base 116 in the gravity direction can be kept basically constant, so that the gravity applied by the seat 2 is prevented from doing work, and the moment effect that the gravity of the seat 2 keeps the frame 1 in the unfolding state is avoided. In cooperation with the arrangement that the gravity center of the seat 2 is close to the rear end of the base 116, the automatic folding of the frame 1 can be realized.

In maintaining the respective states of the vehicle frame 1, with reference to an embodiment, the first locking mechanism is used to maintain the corresponding side frame 11 in the deployed state; in the folded state, the side bars 113 of the respective side frames 11 abut on the rear foot bars 114, and the second lock mechanisms 12 that engage with the side bars 113 are provided on the side frames 11 or the rear foot bars 114 of the respective side frames 11, and the second lock mechanisms 12 are used to hold the corresponding side frames 11 in the folded state.

The first locking mechanism enables the frame 1 to be stabilized in the deployed state, thereby providing comfortable seating for the child and pushing by the user. The second locking mechanism 12 can stabilize the frame 1 in the folded state, thereby facilitating the transportation and storage of the automatically folded frame 1 by a user.

The second locking mechanism 12 may be configured as a single-operated locking mechanism, or may be configured as an automatic locking mechanism to further improve the operational convenience of automatic folding. In an embodiment, the second locking mechanism 12 includes a lock tongue 121 and a lock catch 122 that are engaged with each other, and guide structures that are engaged with each other are disposed on the lock tongue 121 and the lock catch 122; when the side frame 11 is folded, the side rods 113 and the rear foot rods 114 are close to each other, and the latch tongue 121 and the latch catch 122 are locked to each other by a guide structure.

In a specific product, the latch bolt 121 is an elastic component, and can deform under the action of the guiding structure to avoid the lock catch 122 to realize locking. The release process may release the shackle 122 by deformation of the locking tongue 121.

In the specific form of the frame 1 in the folded state, with reference to one embodiment, each side frame 11 is arranged in the folded state as follows:

the side rods 113 and the front foot rods 115 respectively abut against the rear foot rods 114 from both sides;

the push-up handle bar 111, the side bar 113, the rear foot bar 114 and the front foot bar 115 are attached in sequence;

the lower push lever 112, the side lever 113, and the front leg lever 115 are respectively abutted against the rear leg lever 114 from three directions.

The sequential attachment of the rods can optimize the overall appearance and volume of the frame 1 in a folded state, and is convenient to store and transport. It should be noted that the rods on each side frame 11 may be disposed out of plane, thereby avoiding interference between the rods in space. For example, in the present embodiment, the lower handspike 112, the side stick 113 and the front foot stick 115 respectively abut against the rear foot stick 114 from three directions, which refer to three mutually non-intersecting surfaces in the space of the rear foot stick 114. This setting can be abundant utilize the interrelation of member to realize more reasonable storage volume performance.

In the folded state, the folding roller 1121 and the front roller 1151 are respectively located at two sides of the rear roller 1141, and the rear roller 1141 and the front roller 1151 realize standing or the rear roller 1141 and the folding roller 1121 realize standing.

The rear roller 1141 and the front roller 1151 can realize a group of supporting structures, and the rear roller 1141 and the folding roller 1121 can also realize a group of supporting structures, and the arrangement mode in the embodiment provides a structural foundation for the automatic folding and standing of the frame 1, and can flexibly set the rod relationship of the frame 1 according to different conditions.

Referring to an embodiment, the front rollers 1151 are universal wheels, and in the folded state, the center of gravity of the seat 2 is located on a side of the rear rollers 1141 facing the folding rollers 1121.

When the front roller 1151 is a universal wheel or the front foot bar 115 is short, the frame 1 in the folded state cannot stably stand through the front roller 1151 and the rear roller 1141, and in this embodiment, the center of gravity of the seat 2 is set to ensure that the frame 1 in the folded state stably stands through the rear roller 1141 and the folding roller 1121. Particularly, the frame 1 may be disturbed due to the action of the rod of the frame 1 during the automatic folding process, and the gravity center of the seat 2 can well restrain the movement trend, so that the stable automatic folding of the frame 1 is realized.

Referring to fig. 5a to 5b, in one embodiment, the seat 2 comprises a folding bracket 22 and a seat cover mounted on the folding bracket 22, the folding bracket 22 comprises two symmetrically arranged side frames of the seat 2, each side frame of the seat 2 comprises:

a seat plate 21 fitted with the base 116;

a front seat bar 222, the lower end of which is hinged with the front side of the seat plate 21;

a rear seat rod 223 with the lower end hinged with the rear side of the seat plate 21;

a first link 224 having one end hinged to the middle of the front seat link 222 and the other end hinged to the upper end of the rear seat link 223;

a handle bar 225, the lower end of which is hinged with the upper end of the front seat bar 222;

a second link 226 having one end hinged to the upper end of the recoil rod 223 and the other end hinged to the lower end of the handle bar 225;

a back board 228 whose bottom is hinged to the rear side of the seat board 21;

the seat plate 21, the front seat lever 222, the first link 224, and the rear seat lever 223 constitute a third link mechanism deformable with the folding bracket 22, and the front seat lever 222, the handle lever 225, the first link 224, and the second link 226 constitute a fourth link mechanism deformable with the folding bracket 22.

The third and fourth linkages structurally share the first link 224 and the front seat lever 222, so that the spatial configuration change of the third linkage is synchronized to the fourth linkage, thereby achieving the folding and unfolding of the seat 2. The front seat lever 222 and the rear seat lever 223 need to be eccentrically hinged when being hinged with the seat plate 21, that is, a single side edge of the seat plate 21 is provided with a first hinge point and a second hinge point at different positions, the lower end of the front seat lever 222 is hinged with the first hinge point, and the lower end of the rear seat lever 223 is hinged with the second hinge point.

The seat plate 21 is used for realizing the front and back rotation of the seat 2 relative to the frame 1, and the folding bracket 22 is used as a framework and is mainly used for supporting a cloth cover and a sunshade, and has two states of folding and unfolding.

In one embodiment, the first link 224, the upper end of the recoil rod 223 and the second link 226 are coaxially hinged; the handle bar 225 is provided with an extension 2251 extending in the direction of the sit-forward bar 222, and the second link 226 is hinged to the handle bar 225 through the extension 2251.

Since the two link mechanisms share the first link 224, the first link 224 comes into a connected relationship with two components, and in the present embodiment, a coaxial hinge is adopted for the sake of simplification of the structure and ease of assembly. The arrangement order of the specific components can be adjusted according to the folding requirements of the folding bracket 22.

The extension 2251 is actually part of the handle bar 225, and in order to avoid pinching, in one embodiment, the extension 2251 abuts the seatpost 222 when the folding bracket 22 is in the unfolded state.

In the cooperative relationship of the members, in one embodiment, the folding bracket 22 is in the folded state, and the handle bar 225 and the recoil bar 223 are respectively abutted against both sides of the recoil bar 222.

The folding state of the above form can obtain more regular folding performance, and is convenient for users to use under different conditions.

The articulation between the rods can be achieved by a simple rotating shaft or by providing a rotating joint 227. In one embodiment, the bottom of the handle bar 225 is provided with an upper joint seat 2252, the top of the front seat bar 222 is provided with a lower joint seat 2221, and the upper joint seat 2252 and the lower joint seat 2221 are engaged with each other with the first rotation axis as the rotation center to form a rotation joint 227; the rotary joint 227 is provided with a third locking mechanism 23 for restricting the rotation of the two.

In this embodiment, the revolute joint 227 enables articulation of the sidebar 113 and the forefoot bar 115. The advantage of the articulated seat is that it avoids the occurrence of grip gaps, while accommodating more components, such as the third locking mechanism 23. In order to avoid the influence of the bulky joint seat on the motion relationship of the rod, in an embodiment, the extending path of the second link 226 is curved, and the folding bracket 22 is in the folded state, and the second link 226 fits the outer peripheral surface of the rotating joint 227. The provision of the second link 226 as an arcuate bar also provides some assistance in the folding effect of the folding bracket 22, which may result in a more orderly folded appearance.

Referring to fig. 1a to 4c, the present application further discloses an automatic folding method of a stroller, comprising:

unlocking the first locking mechanism;

the rear end of the base 116 moves downward in the gravity direction under the action of the gravity of the seat 2 until the side bars 113 and the rear foot bars 114 of each frame 1 abut against each other, and the frame 1 in the folded state stands by itself in any one of the following ways:

the front roller 1151 at the bottom of the front foot bar 115 and the rear roller 1141 at the bottom of the rear foot bar 114 are abutted against the supporting surface; or

The rear roller 1141 at the bottom of the rear foot rod 114 and the folding roller 1121 at the top of the lower push rod 112 are abutted against the supporting surface.

The method can be realized by the automatically folded stroller in the technical scheme, and the unfolding process can be reversely operated, so that the detailed description is omitted.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. The automatic folding stroller comprises a frame and a seat detachably mounted on the frame, wherein the frame comprises two side frames which are oppositely arranged, and the automatic folding stroller is characterized in that each side frame comprises a front foot bar and a rear foot bar which are hinged with each other, an upper push hand bar and a lower push hand bar which are hinged with each other, the lower push hand bar is also hinged with the rear foot bar, a side bar is hinged between the upper push hand bar and the rear foot bar, the upper push hand bar, the side bar, the rear foot bar and the lower push hand bar form a first connecting rod mechanism which can be switched between a folding state and an unfolding state, and the first connecting rod mechanism is provided with a first locking mechanism;

the seat includes bedplate and articulated back board with the bedplate, the back board have for the bedplate rotates to the folding state and the relative state of taking of presetting the angle, and the self gravity of the seat under the folding state can drive the lock release first link mechanism gets into fold condition and keep the frame stands, first link mechanism gets into fold condition in-process, preceding foot bar with back foot bar draws close each other in order to realize the frame stands.

2. The automatically collapsible stroller of claim 1, wherein each of said side frames comprises:

the top ends of the front foot rod and the rear foot rod are hinged with 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;

the middle part of the lower push hand rod is hinged with the middle part of the rear foot rod, and the bottom of the lower push hand rod extends to the front foot rod beyond the rear foot rod;

the two ends of the side rod are respectively hinged with the upper push handle rod and the rear foot rod;

two ends of the linkage rod are respectively hinged with the bottom of the lower push handle rod and the middle of the front foot rod;

the rear foot rod, the front foot rod, the lower push hand rod and the linkage rod form a second connecting rod mechanism.

3. The stroller of claim 2, wherein the top end of the lower push rod is provided with a folding roller, and in the folded state, the folding roller and the front roller are respectively located at two sides of the rear roller, and the rear roller and the front roller stand or the rear roller and the folding roller stand.

4. The stroller of claim 3, wherein the front rollers are universal wheels, and the center of gravity of the seat is located on a side of the rear rollers facing the folding rollers in the folded state.

5. The stroller of claim 1, wherein a base is disposed between the two vehicle frames, the front portion of the base is hinged to the front leg bar, the rear portion of the base is hinged to the lower handle bar, and the seat plate is pivotally connected to the base such that the seat has two orientations.

6. The stroller of claim 5, wherein the hinge joint between the base and the lower handle bar and the hinge joint between the rear foot bar and the lower handle bar are offset in the direction of gravity in the unfolded state.

7. The stroller of claim 5, wherein the base and the front leg bar are hinged to each other by a swing rod, and the height of the hinge of the base and the swing rod in the gravity direction remains substantially constant when the side frame is moved from the unfolded state to the folded state.

8. The automatically collapsible stroller of claim 5, wherein the seat comprises a folding bracket and a seat cover mounted on the folding bracket, the folding bracket comprising two symmetrically arranged seat side frames, each seat side frame comprising:

a seat plate cooperating with the base;

the lower end of the front seat rod is hinged with the front side of the seat plate;

the lower end of the backseat rod is hinged with the rear side of the seat plate;

one end of the first connecting rod is hinged with the middle part of the front seat rod, and the other end of the first connecting rod is hinged with the upper end of the rear seat rod;

the lower end of the handle rod is hinged with the upper end of the front seat rod;

one end of the second connecting rod is hinged with the upper end of the backseat rod, and the other end of the second connecting rod is hinged with the lower end of the handle rod;

the bottom of the backrest plate is hinged with the rear side of the seat plate;

the seat board the front seat rod, first connecting rod and the back seat rod constitute and can follow the third link mechanism of folding support deformation, the front seat rod the handle pole first connecting rod and the second connecting rod constitute and can follow the fourth link mechanism of folding support deformation.

9. The automatically collapsible stroller of claim 1, wherein the first locking mechanism is configured to maintain the corresponding side frame in the deployed state; in a folded state, the side rods of each side frame are attached to the rear foot rods, and a second locking mechanism matched with the side rods is arranged on the rear foot rods of one side frame or each side frame and used for keeping the corresponding side frame in the folded state;

the second locking mechanism comprises a lock tongue and a lock catch which are matched with each other, and guide structures which are matched with each other are arranged on the lock tongue and the lock catch; when the side frame enters a folded state, the side rods and the rear foot rods are close to each other, and the lock tongue and the lock catch are locked with each other through the guide structure.

10. The automatically collapsible stroller of claim 1, wherein in the collapsed position, each side frame is configured as follows:

the side rods and the front foot rods are respectively attached to the rear foot rods from two sides;

the push-up handspike, the side rods, the rear foot rods and the front foot rods are sequentially attached;

the lower push hand rod, the side rods and the front foot rod are respectively attached to the rear foot rod from three directions.

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