Foldable stroller frame and foldable stroller

This application claims priority to Chinese patent application No. 201710174861.5 filed on Mar. 22, 2017 and Chinese patent application No. 201611111214.1 filed on Dec. 6, 2016, titled “Foldable Stroller Frame and Foldable Stroller”, which are incorporated herein by reference in their entirety.

The present disclosure relates to the technical field of strollers and, more particularly, to a foldable stroller frame and a foldable stroller.

Strollers are a tool commonly found in daily life, such as a stroller for shopping, a stroller suitable for lying and sitting of babies, or the like. In order to facilitate carrying and storage when not in use, a baby stroller, for example, is generally configured to be foldable. Space occupied by the stroller is reduced by folding of the stroller.

There are a wide variety of kinds of frames of the existing foldable stroller, but either its structure is complex and structural strength is not high, or it is very inconvenient to be folded. Moreover, the foldable strollers are bulky after being folded, inconvenient for storage and placement, and cannot be adapted to the user's space for holding. These drawbacks may cause inconvenience to the users, make the user experience poor, and not conducive to market promotion.

It is an object of the present disclosure to provide a foldable stroller frame and a foldable stroller to solve the existing problems of the foldable stroller, such as the structure is complicated and the folding is not convenient.

In order to achieve the propose, the present disclosure adopts the following technical solutions:

A foldable stroller frame includes a front wheel bracket and a rear wheel bracket rotatably connected to the front wheel bracket. An upper end of the rear wheel bracket is rotatably connected to a side handrail, and a rear end thereof is rotatably connected to a rear supporting bar. The side handrail and the rear supporting bar are rotatably connected to a push bar ( 4 ) from different shafts. The rear wheel bracket is provided with a slidable sleeve to which a front wheel bracket link and a side handrail link are rotatable connected, respectively. An end of the front wheel bracket link that is not connected to the slidable sleeve is rotatably connected to the front wheel bracket, and an end of the side handrail link that is not connected to the slidable sleeve is rotatably connected to the side handrail.

The present disclosure further provides a foldable stroller comprising the foldable stroller frame described above.

According to the configuration described above, the foldable stroller frame of the present disclosure can be folded more conveniently and quickly, and has a small volume and is convenient to carry and store after being folded, thus bring great convenience for the user. Furthermore, with the above configuration, it is possible to make the whole structure of stroller more stable as the stroller is unfolded.

FIG. 1 is a perspective structural schematic view illustrating a foldable stroller frame according to a first embodiment.

FIG. 2 is a side view illustrating the foldable stroller frame according to the first embodiment.

FIG. 3 is a schematic view illustrating a state of the foldable stroller frame according to the first embodiment with the upper half thereof being concealed.

FIG. 4 is a schematic view illustrating another state of the foldable stroller frame according to the first embodiment with the upper half thereof being concealed.

FIG. 5 is a schematic view illustrating a half-folded state of the foldable stroller frame according to the first embodiment.

FIG. 6 is a side view illustrating a half-folded state of the foldable stroller frame according to the first embodiment.

FIG. 7 is a schematic view illustrating a full-folded state of the foldable stroller frame according to the first embodiment.

FIG. 8 is a perspective structural schematic view illustrating a foldable stroller frame according to a second embodiment.

FIG. 9 is a side view illustrating the foldable stroller frame according to the second embodiment.

FIG. 10 is a schematic view illustrating a half-folded state of the foldable stroller frame according to the second embodiment.

FIG. 11 is a side view illustrating a half-folded state of the foldable stroller frame according to the second embodiment.

FIG. 12 is a schematic view illustrating a full-folded state of the foldable stroller frame according to the second embodiment.

Various embodiments will be further described below with reference to the drawings and by way of specific embodiments.

First Embodiment

The present embodiment provides a foldable stroller frame, and in the present embodiment, the directions such as “front”, “rear”, “left”, “right”, “upper” and “lower” as involved herein shall be illustrated as the direction toward which the user faces as he/she pushes the stroller. Namely, the front means the direction toward which the user faces directly as he/she pushes the stroller, based on this, each of the directions will be illustrated.

As shown in FIGS. 1-7 , the foldable stroller frame includes a front wheel bracket 1 , a rear wheel bracket 2 , a side handrail 3 , a push bar 4 , a rear supporting bar 5 , a front wheel bracket link 6 , a side handrail link 7 , a slidable sleeve 8 , a front wheel assembly 11 and a rear wheel assembly 12 .

The front wheel assembly 11 is mounted on the front wheel bracket 1 , and the rear wheel assembly 12 is mounted on the rear wheel bracket 2 .

As shown in FIG. 2 , the front wheel bracket 1 is rotatably connected to the rear wheel bracket 2 by means of a pin 27 . In particularly, the rear wheel bracket 2 includes a left rear wheel bracket 2 a and a right rear wheel bracket 2 b that are rotatably connected to two sides of the front wheel bracket 1 by means of the pin 27 , respectively.

An upper end of the rear wheel bracket 2 is rotatably connected to the side handrail 3 by means of a pin 29 , and a rear end thereof is rotatably connected to the rear supporting bar 5 by means of a pin 33 . The side handrail 3 is rotatably connected to the push bar 4 by means of a pin 30 , and the push bar 4 is also connected with a front hood bar 19 . In other words, the side handrails 3 , the push bar 4 and the front hood bar 19 are rotatably connected to one another by the pin 30 in a coaxial manner, and the push bar 4 and the rear supporting bar 5 are rotatably connected to each other by means of a pin 32 . In the present embodiment, a lower end of the push bar 4 is rotatably connected to the rear supporting bar 5 by means of the pin 32 .

The rear wheel bracket 2 is provided with a slidable sleeve 8 which is rotatably connected to a front wheel bracket link 6 by a pin 36 and which is rotatably connected to a side handrail link 7 by a pin 35 . One end of the front wheel bracket link 6 that is not connected to the slidable sleeve 8 is rotatably connected to the front wheel bracket 1 by means of a pin 28 , and one end of the side handrail link 7 that is not connected to the slidable sleeve 8 is rotatably connected to the side handrail 3 by a pin 31 . In particular, the slidable sleeve 8 may includes a slidable sleeve 8 a and a slidable sleeve 8 b in the present embodiment.

According to the present embodiment, as illustrated in FIGS. 3 and 4 , the foldable baby stroller may further include left and right rear supporting bars 23 , 22 which are rotatably connected to each other and intersect at their middle portion by a pin 49 . One end of the left rear supporting bar 23 is rotatably connected to a left front supporting bar 25 by a pin 44 , and the other end thereof is rotatably connected to a right front wheel bracket link 6 b of the front wheel bracket link 6 by means of a pin 48 . One end of the right rear supporting bar 22 is rotatably connected to a right front supporting bar 24 by a pin 45 , and the other end thereof is rotatably connected to a left front wheel bracket link 6 a of the front wheel bracket link 6 by means of a pin 47 . An end of the left front supporting bar 25 that is not connected to the left rear supporting bar 23 is rotatably connected to an end of the left front wheel bracket link 6 a that is not connected to the right rear supporting bar 22 , and an end of the right front supporting bar 24 that is not connected to the right rear supporting bar 22 is rotatably connected to an end of the right front wheel bracket link 6 b that is not connected the left rear supporting bar 23 by a pin 46 .

In the present embodiment, the foldable baby stroller as described above may further include upper and lower cross supporting bars 20 , 21 which are rotatably connected to each other and intersect at their middle portion by a pin 42 . Optionally, an end of the upper cross supporting bar 20 is rotatably connected to a right rear wheel bracket 2 b of the rear wheel bracket 2 by means of a pin 40 b , and the other end thereof is rotatably connected to a left U-shaped member 26 a by a pin 41 a . The left U-shaped member 26 a is rotatably connected to the left front wheel bracket link 6 a by a pin 36 , and a rotation center of the left U-shaped member 26 a is coaxial with that of the left front wheel bracket link 6 a and the slidable sleeve 8 .

One end of the lower cross supporting bar 21 is rotatably connected to the left rear wheel bracket 2 a of the rear wheel bracket 2 by a pin 40 a , and the other end thereof is rotatably connected to a right U-shaped member 26 b by a pin 41 b . The right U-shaped member 26 b is rotatably connected to the right front wheel bracket link 6 b by another pin 36 , and a rotation center of the right U-shaped member 26 b is coaxial with that of the right front wheel bracket link 6 b and the slidable sleeve 8 .

In the present embodiment, the foldable baby stroller described above may further include a front handrail. In particular, the front handrail may include a front handrail middle rod 16 , and two front handrail links, which include left and right front handrail link 15 a , 15 b , arranged symmetrically and rotatably connected to two ends of the front handrail middle rod 16 . An end of each front handrail link that is not connected to the front handrail middle rod 16 is rotatably connected to a front handrail plug that may include a left front handrail plug 14 a connected to the left front handrail link 15 a and a right front handrail plug 14 b connected to the right front handrail link 15 b . After the front handrail middle rod 16 , the front handrail link and the front handrail plug are assembled together, the assembled configuration may be inserted into the side handrail link 7 by means of the front handrail plug.

According to present embodiment, left and right push handles 17 a , 17 b are rotatably connected to upper ends of the push bars 4 at two sides by means of pins 38 a , 38 b , respectively. The left push handle 17 a and the right push handle 17 b are rotatably connected to each other by a pin 39 . Moreover, a locking member is disposed between the left push handle 17 a and the right push handle 17 b and is used to lock and unlock the left push handle 17 a and the right push handle 17 b . The locking member in the present embodiment may be an unlock button 18 .

In the present embodiment, a locking mechanism for locking the whole stroller frame is further arranged between the side handrail 3 and the push bar 4 . When the locking member unlocks the left and right push handles 17 a , 17 b and presses against the push bar 4 downwardly and forwardly, the locking mechanism can automatically release the locking of the whole stroller frame, thereby completing the folding of the whole stroller frame.

According to the present embodiment, the foldable baby stroller described above may further be provided with a seat bar 9 rotatably connected to the front wheel bracket link 6 by a pin 34 . An end of the seat bar 9 that is not connected to the front wheel bracket link 6 is rotatably connected to a seat bar link 10 by a pin 50 , and an end of the seat bar link 10 that is not connected to the seat bar 9 is rotatably connected to the rear wheel bracket 2 by a pin 33 . Further, a rotation center of the seat bar link 10 is coaxial with that of the rear supporting bar 5 and the rear wheel bracket 2 . A backrest bar 13 may be rotatably connected to the seat bar 9 by means of a pin 37 .

In order to fold the foldable stroller frame of the present embodiment, firstly, the locking relation between the left push handle 17 a and the right push handle 17 b may be released by the locking member. Subsequently, the left push handle 17 a and the right push handle 17 b may be pressed downwardly and forwardly such that the locking mechanism between the side handrail 3 and the push bar 4 is automatically unlocked. Next, the push bar 4 may be pressed downward continually, and at this time the state of the foldable stroller frame is shown as in FIGS. 5 and 6 .

After that, the whole stroller frame may be further folded forwardly and downwardly. The full folding of the whole foldable stroller frame may be achieved by the interaction relation among the components described above, and the full-folded state is shown as in FIG. 7 .

A foldable stroller including the foldable stroller frame as described above may be further provided by the present disclosure. With the configuration of the foldable stroller frame as described above, the stroller frame can be folded more conveniently and quickly, and has a small volume and is convenient to carry and store after being folded, thus bring great convenience for the user. Furthermore, with the above configuration, it is possible to make the whole structure of stroller more stable as the stroller is unfolded.

Second Embodiment

The present embodiment differs from the first embodiment in that the seat bar 9 of the present embodiment is not rotatably connected to the front wheel bracket link 6 , and as shown in FIGS. 8-12 , the seat bar 9 is slidably provided within the seat bar slidable sleeve 51 . The seat bar slidable sleeve 51 is rotatably connected to the side handrail 3 by a pin 52 , an end of the seat bar 9 may be rotatably connected to the side handrail link 7 by a pin 53 , and an upper end of the side handrail link 7 is rotatably connected to a front handrail socket 55 . In particular, a connecting member is arranged on the side handrail and is rotatably connected to the front handrail socket 55 , and a rotation center of the front handrail socket 55 is coaxial with a rotation center of the front handrail link 7 and the side handrail 3 . Namely, the rotational connection among the front handrail socket 55 , a front handrail link 7 and the side handrail 3 may be achieved by a pin 54 , and then the front handrail may be inserted into the front handrail socket 55 by the front handrail plug.

In order to fold the foldable stroller frame of the present embodiment, firstly, the locking relation between the left push handle 17 a and the right push handle 17 b may be released by the locking member. Subsequently, the left push handle 17 a and the right push handle 17 b may be pressed downwardly and forwardly such that the locking mechanism between the side handrail 3 and the push bar 4 is automatically unlocked. Next, the push bar 4 may be pressed downward continually, and at this time the state of the foldable stroller frame may be illustrated as in FIGS. 10 and 11 .

After that, the whole stroller frame may be further folded forwardly and downwardly. The full folding of the whole foldable stroller frame may be achieved by the interaction relation among the components described above, and the full-folded state is shown as in FIG. 12 .

The above-described embodiments are only the examples made for illustrating the present disclosure and are not intended to limit the embodiments. Various other changes or variations may be made on the basis of the above description. It is unnecessary and impossible to exhaust all the implementations. Any modifications, equivalent substitutions and improvements that fall within the spirit and principles of the disclosure are intended to be included within the scope of the appended claims.