CN115783023A - a stroller for children - Google Patents

Abstract

The invention discloses a children's stroller, comprising a stroller frame and a seat assembly, the stroller frame includes a strut, the seat assembly includes a seat plate and a backrest assembly slidably arranged on the strut, the backrest assembly includes a lower backrest and an upper and lower backrest Sliding the upper backrest arranged on the lower backrest, the stroller also includes a driving mechanism that makes the upper backrest slide relative to the lower backrest when the seat plate slides relative to the support rod, and the driving mechanism includes driving the upper backrest toward The first strap that slides down and the second strap that drives the upper backrest to slide upward when the seat board of the child stroller slides in the opposite direction relative to the support rod, and one end of the first strap and the second strap is fixed on the upper backrest above, the first strap and the second strap slide through the lower backrest, the seat plate and the support bar respectively, and the other ends of the first strap and the second strap are fixed on the seat plate, or the first strap and the second straps slide through the lower backrest and the seat board respectively, and the other ends of the first straps and the second straps are fixed on the struts.

Description

a stroller for children

technical field

The invention relates to the technical field of children's products, in particular to a baby stroller.

Background technique

Children's strollers generally include a stroller frame and a seat assembly arranged on the stroller frame. The seat assembly includes a seat board and a backrest. In order to make the children's stroller easy to carry and store, the children's stroller can generally be folded, that is, The stroller frame is foldable, as is the seat unit.

In order to make the stroller smaller when folded, and to enable the seat assembly and the stroller frame to be more tightly packed together, some strollers have the upper and lower backrests, which are slidably connected to each other. When the stroller is unfolded and used, the upper and lower parts of the backrest slide relatively away from each other. When the stroller is folded, the upper and lower parts of the backrest slide relatively close together. But in the prior art, when the children's stroller of this structure is folded, the upper and lower parts of the backrest need to be operated separately so that the upper and lower parts of the backrest slide relatively close together before the stroller frame can be operated to fold the stroller frame. Or, conversely, after the cart frame is folded, it needs to be operated separately so that the upper and lower parts of the backrest slide relatively close together. Regardless of the folding method, the stroller frame and the backrest need to be operated separately, and the same is true when the stroller is unfolded from the folded state, which makes the folding and unfolding operations of the stroller inconvenient and inconvenient for the use of the stroller .

Contents of the invention

The object of the present invention is to address the deficiencies in the prior art and provide a baby stroller. When the stroller frame is folded, the upper backrest can be driven to slide down relative to the lower backrest through the first belt to make the backrest assembly Synchronous folding, and when the stroller frame is unfolded, the upper backrest can be driven to slide upward relative to the lower backrest through the second belt so that the backrest assembly is unfolded synchronously.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A stroller for children, comprising a stroller frame with an unfolded state and a folded state, and a seat assembly arranged on the stroller frame, the stroller frame includes a strut, and the seat assembly includes a The seat board which is slidably arranged on the support bar and the backrest assembly which is arranged at the rear of the seat board, the backrest assembly includes a lower backrest which is connected to the rear of the seat board and can move in the up and down direction The upper backrest is slidably arranged on the lower backrest. When the baby stroller is unfolded and folded, the seat plate slides relative to the support bar. A driving mechanism that drives the upper backrest to slide relative to the lower backrest when the bar slides, the driving mechanism includes driving the upper backrest to move relative to the lower backrest when the stroller is folded and the seat board slides relative to the support rod. the first belt for the backrest to slide downwards and the second belt for driving the upper backrest to slide upwards relative to the lower backrest when the seat plate is reversely slid relative to the support bar when the stroller is unfolded; Both ends of the first strap and the second strap are fixed on the upper backrest, and the first strap and the second strap slide through the lower backrest and the seat board respectively. and the strut, the other ends of the first strap and the second strap are fixed on the seat plate, or the first strap and the second strap are respectively Sliding through the lower backrest and the seat board, the other ends of the first strap and the second strap are fixedly arranged on the support rod.

Preferably, the lower backrest is provided with a first perforation, the seat plate is provided with a second perforation, and the first strap slides downwards through the first perforation and the second perforation sequentially from one end thereof. Two perforations, and the other end of which slides around the support rod and is fixedly arranged on the seat plate, or the first strap slides sequentially from one end down through the first perforation and the After the second perforation, the other end is fixedly arranged on the support rod.

Further, when the stroller is in the unfolded state, the part of the first strap between one end and the first hole is located behind the backrest assembly, and the first strap is located at the The portion between the first through hole and the second through hole is located above the seat plate and in front of the backrest assembly, and the first strap is located between the second through hole and the other end thereof The part is located below the seat plate.

Further, the fixing point of the first strap on the upper backrest is located on the upper part of the upper backrest and above the first perforation, and the fixing point of the first strap on the seat plate The point is at the rear of the seat pan and behind the strut.

Further, when the seat plate of the stroller is folded and slides relative to the support rod, the length of the part of the first strap located between the second through hole and the other end thereof increases, and the first belt A portion of a strap between one end thereof and the first perforation is reduced in length such that the first strap pulls the upper backrest to slide downward relative to the lower backrest.

Preferably, a third perforation is provided on the lower backrest, a fourth perforation is provided on the seat plate, and the second strap slides downward from one end thereof around the lower end of the upper backrest or through The lower part of the upper backrest slides upward through the third through hole and slides down through the fourth through hole, then slides around the support rod so that the other end is fixedly arranged on the seat plate, Alternatively, the second strap slides from one end down around or through the lower portion of the upper backrest and up through the third through hole and down through the lower end of the upper backrest. After the fourth perforation, the other end is fixedly arranged on the strut.

Further, when the stroller is in the unfolded state, the part of the second belt between one end and the lower end of the upper backrest is located behind the upper backrest, and the second belt is located at the rear of the upper backrest. The part between the lower end of the upper backrest and the third perforation is located in front of the upper backrest and behind the lower backrest, and the second belt is located at the third perforation and the fourth perforation. The part between is located above the seat board and in front of the backrest assembly, and the part of the second strap located between the fourth through hole and its other end is located below the seat board.

Further, the fixing point of the second strap on the upper backrest is located at the lower part of the upper backrest and below the third perforation, and the fixing point of the second strap on the seat plate The point is located at the front of the seat pan and in front of the struts.

Furthermore, when the baby stroller is unfolded and the seat plate slides in reverse relative to the support rod, the length of the part of the second strap located between the fourth through hole and the other end thereof increases, so that The length of the portion of the second strap located between the lower end of the upper backrest and the third perforation is reduced, so that the second strap pulls the upper backrest to slide upward relative to the lower backrest.

Preferably, the first strap and the second strap are respectively arranged on the left and right sides.

Preferably, the seat assembly further includes cloth covers respectively covering the outside of the seat board and the backrest assembly, and both the first strap and the second strap are located in the cloth covers.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: when the children's stroller of the present invention is folded, the seat plate slides backward relative to the support bar, and the upper backrest can be driven to be opposite to the lower backrest through the first belt Sliding downwards makes the backrest assembly fold synchronously, and when the stroller frame is unfolded, the seat plate slides forward relative to the struts, and the upper backrest can be driven to slide upwards relative to the lower backrest through the second belt so that the backrest assembly is unfolded synchronously. In this way, when the stroller is unfolded and folded, as long as the stroller frame is operated to make it move, the upper backrest can be driven to slide relative to the lower backrest synchronously, thereby realizing the synchronous folding and unfolding operation of the stroller frame and the backrest assembly, so that children The folding and unfolding operations of the stroller are very convenient, and the use of the stroller is convenient.

Description of drawings

Accompanying drawing 1 is the three-dimensional schematic diagram (viewed from front to back) when the children's stroller of the present embodiment is in an unfolded state;

Accompanying drawing 2 is the three-dimensional schematic diagram when the children's stroller of the present embodiment is in the unfolded state (looking from the back to the front, part of the stroller frame is removed);

Accompanying drawing 3 is the side view schematic diagram when the stroller of this embodiment is in the unfolded state;

Accompanying drawing 4 is the three-dimensional schematic view (viewed from front to back) of the seat assembly of the present embodiment when the backrest assembly is in the unfolded state;

Accompanying drawing 5 is the three-dimensional schematic diagram (viewed from the rear) of the seat assembly of the present embodiment when the backrest assembly is in an unfolded state;

Accompanying drawing 6 is the three-dimensional schematic view (viewed from front to back) of the seat assembly of the present embodiment when the backrest assembly is in a folded state;

Accompanying drawing 7 is the three-dimensional schematic view (viewed from the rear) of the seat assembly of the present embodiment when the backrest assembly is in a folded state;

Accompanying drawing 8 is the schematic side view of the stroller of this embodiment in a folded state.

Among them: 11, support rod; 12, front bracket; 13, rear bracket; 14, upper push rod; 15, lower push rod; 16, upper link; 17, front link; 18, rear link; 19, sliding 2, seat assembly; 21, seat plate; 211, the second perforation; 212, the fourth perforation; 221, the upper backrest; 222, the lower backrest; 222a, the first perforation; 222b, the third perforation; 3, the first Drawstring; 31, the first end; 32, the second end; 4, the second drawstring; 41, the third end; 42, the fourth end.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIGS. 1 to 3 and 8 , the children's stroller of the present invention includes a stroller frame in an unfolded state and a folded state, and a seat assembly 2 arranged on the stroller frame.

The stroller frame includes a strut 11, and the seat assembly 2 includes a seat board 21 and a backrest assembly. The seat plate 21 is located above the strut 11 , and the seat plate 21 is slidably disposed on the strut 11 along the front-rear direction. The backrest assembly includes an upper backrest 221 and a lower backrest 222 , the lower part of the lower backrest 222 is connected to the rear part of the seat plate 21 , and the upper backrest 221 is disposed on the lower backrest 222 so as to be slidable in an up-down direction.

The backrest assembly has an expanded state and a folded state. When the backrest assembly is in the unfolded state, the upper backrest 222 is far away from the seat board 21 , and the upper backrest 221 protrudes upward from the lower backrest 221 by a relatively large distance, as shown in FIGS. 4 and 5 . When the backrest assembly is in the folded state, the upper backrest 222 is close to the seat plate 21, and the height of the upper backrest 222 does not exceed the height of the lower backrest 221, or slightly higher than the height of the lower backrest 222, as shown in FIGS. 6 and 7 . The upper backrest 221 slides up and down relative to the lower backrest 222, so that the backrest assembly can be switched between an unfolded state and a folded state.

Preferably, the lower portion of the lower backrest 222 is rotatably connected with the rear portion of the seat plate 21 . In this way, the backrest assembly 2 can rotate relative to the seat panel 21 as a whole, so that the backrest assembly 2 is away from the seat panel 21, and the seat assembly 2 is unfolded; or the backrest assembly 2 is close to the seat panel 21, so that the seat assembly 2 is folded.

The stroller also includes a drive mechanism. When the stroller frame is folded from the unfolded state, the driving mechanism can drive the backrest assembly to be folded from the unfolded state synchronously. When the stroller frame is unfolded from the folded state, the backrest assembly can be driven to unfold from the folded state synchronously through the driving mechanism.

The driving mechanism includes a first belt 3 and a second belt 4 . When the stroller frame is folded from the unfolded state, the seat plate 21 slides backward relative to the strut 11 , and the upper backrest 221 is driven to slide downward relative to the lower backrest 222 through the first strap 3 , so that the backrest assembly is folded. When the stroller is unfolded from the folded state, the seat board 21 slides forward relative to the strut 11 , and the upper backrest 221 is driven to slide upward relative to the lower backrest 222 through the second belt 4 , so that the backrest assembly is unfolded.

Specifically, the two ends of the first belt 3 are respectively marked as the first end 31 and the second end 32, the lower backrest 222 is provided with a first perforation 222a penetrating through its front and rear two ends, and the seat plate 21 is provided with a penetrating hole 222a penetrating its upper and lower sides. Second through holes 211 on both ends.

The first end 31 of the first strap 3 is fixedly arranged on the upper backrest 221, and the fixed point of the first end 31 on the upper backrest 221 is above the first perforation 222a, and the first strap 3 extends from the first end 31 to After sliding through the first through hole 222a and the second through hole 211 in sequence, slide around the strut 11 so that the second end 32 is fixedly arranged on the seat plate 21, and the fixed point of the second end 32 on the seat plate 21 is located on the support rod 11. Rear of rod 11.

Alternatively, after the first strap 3 slides through the second through hole 211 , the second end 32 thereof is fixedly arranged on the pole 11 .

Like this, the first perforation 222a and the second perforation 211 divide the first band 3 into three sections sequentially, the first section is located between the first end 31 and the first perforation 222a, and the second section is located between the first perforation 222a and the second Between the through holes 211 , the third section is located between the second through holes 211 and the second end 32 .

In this embodiment, the first section of the first strap 3 is located behind the upper backrest 221 and the lower backrest 222, the second section is located above the seat plate 21 and in front of the upper backrest 221 and the lower backrest 222, and the third section Located below the seat plate 21.

When the stroller frame is folded from the unfolded state, the seat plate 21 slides backward relative to the strut 11, and since the positions of the first perforation 222a and the second perforation 211 remain unchanged, in the first strap 3, the third section The length gradually increases, the length of the second section remains constant, and the length of the first section gradually decreases, so that the first end 31 gradually approaches the first perforation 222a downwards, and the upper backrest 221 gradually slides downward relative to the lower backrest 222. This causes the backrest assembly to collapse.

In this embodiment, the fixed point of the first end 31 of the first strap 3 on the upper backrest 221 is located on the upper part of the upper backrest 221, and the second end 32 of the first strap 3 is fixedly arranged on the seat plate 21. The fixing point of the second end 32 of the strap 3 on the seat plate 21 is located at the rear of the seat plate 21 .

The two ends of the second belt 4 are respectively marked as the third end 41 and the fourth end 42. The lower backrest 222 is also provided with a third perforation 222b that runs through its front and rear ends, and the seat plate 21 is also provided with a hole 222b that runs through its upper and lower ends. The fourth through hole 212 on the end face.

The third end 41 of the second strap 4 is fixedly arranged on the upper backrest 221, and the fixed point of the third end 41 on the upper backrest 221 is located below the third perforation 222b, and the second strap 4 extends from the third end 41 to Slide down to go around the lower end of the upper backrest 221, or slide through the perforation provided at the lower part of the upper backrest 221, then slide up through the third perforation 222b, then slide down through the fourth perforation 212, and slide around the support rod 11, so that the fourth end 42 is fixedly arranged on the seat plate 21 , and the fixed point of the fourth end 42 on the seat plate 21 is located in front of the strut 11 . .

Alternatively, after the second strap 4 slides through the fourth through hole 212 , the fourth end 42 thereof is fixedly arranged on the pole 11 .

In this way, the lower end of the upper backrest 221 or the perforation, the third perforation 222b and the fourth perforation 212 arranged on the lower part of the upper backrest 221 divide the second belt 4 into four sections in sequence, and the first section is located at the third end 41 and the upper backrest 221. The lower end of the upper backrest 221 is arranged between the lower end of the upper backrest 221, the second section is located at the lower end of the upper backrest 221 or is arranged between the lower end of the upper backrest 221 and the third throughhole 222b, and the third section is located between the third throughhole 222b and the third throughhole 222b. Between the four through holes 212 , the fourth section is located between the fourth through holes 212 and the fourth end 42 .

In this embodiment, the first section of the second strap 4 is located behind the upper backrest 221, the second section is located in front of the upper backrest 221 and behind the lower backrest 222, the third section is located above the seat plate 21, and Located in front of the lower backrest 222 , the fourth segment is located below the seat plate 21 .

When the stroller frame is unfolded from the folded state, the seat plate 21 slides forward relative to the strut 11, and since the positions of the third perforation 222b and the fourth perforation 212 remain unchanged, in the second strap 4, the fourth section The length increases gradually, and the length of the third section remains constant. On the upper backrest 221, the relative position between the lower end of the upper backrest 221 or the perforation arranged at the bottom of the upper backrest 221 and the third end 41 is always fixed, so that the first The length of the section also remains unchanged, and the length of the second section gradually decreases, so that the lower end of the upper backrest 221 or the perforation arranged at the bottom of the upper backrest 221 gradually approach the third perforation 222b upwards, and the upper backrest 221 gradually moves up relative to the lower backrest 222. Slide so that the backrest assembly unfolds.

In this embodiment, the fixed point of the third end 41 of the second strap 4 on the upper backrest 221 is located at the lower part of the upper backrest 221, and the fourth end 42 of the second strap 4 is fixedly arranged on the seat plate 21. The fixing point of the fourth end 32 of the strap 4 on the seat plate 21 is located at the front of the seat plate 21 .

Conversely, when the stroller frame is folded from the unfolded state, the upper backrest 221 slides downward under the action of the first strap 3, so that the length of the second section of the second strap 4 gradually increases, and the second strap 4 gradually increases. The length of the fourth segment of the band 4 is gradually reduced. When the stroller frame is unfolded from the folded state, the upper backrest 221 is slid upwards under the action of the second strap 4, so that the length of the first section of the first strap 3 is gradually increased, and the second strap of the first strap 4 is gradually increased. The length of the three segments gradually decreases.

Preferably, the first strap 3 and the second strap 4 are respectively arranged on the left and right sides. In this way, the force acting on the upper backrest 221 by the first strap 3 and the second strap 4 can be made more uniform, so that the upper backrest 221 can slide upward or downward relative to the lower backrest 222 in a stable state.

The seat assembly 2 also includes a cloth cover, and the cloth cover covers the outside of the seat plate 21 and the backrest assembly respectively. Both the first strap 3 and the second strap 4 are located in the cloth cover, and are respectively located between the cloth cover and the seat board 21 , and between the cloth cover and the backrest assembly. Like this, the setting of the first strap 3 and the second strap 4 can not affect the seating space of the seat assembly 2, and the setting of the first strap 3 and the second strap 4 can not affect the comfort of the seat assembly 2 when riding. sex affects.

A specific structure of the cart frame is provided in the present embodiment, but the cart frame is not limited to the structure provided in the present embodiment, and the cart frame structure is as follows:

The stroller frame also includes a front support 12, a rear support 13, an upper push rod 14, a lower push rod 15, an upper link 16, a front link 17, a rear link 18 and a slide 19. The upper part of the front bracket 12, the upper part of the rear bracket rod 13 and the lower part of the lower push rod 15 are rotationally connected, and the third is rotationally connected with any one of the above two, or the above three coaxially rotate connect. The bottom of the upper push rod 14 is rotatably connected with the top of the lower push rod 15 . The slider 19 is provided on the rear link 18 so as to be slidable along the longitudinal extension direction of the rear link 18 . The upper end of the upper link 16 is rotatably connected with the lower part of the upper push rod 14 , and the lower end of the upper link 16 is rotatably connected with the slider 19 . The struts 11 are arranged between the upper part of the front bracket 12 , or the upper part of the rear bracket 13 , or the lower part of the push rod 14 on the left and right sides. The rear portion of the seat plate 21 is rotatably and slidably provided on the upper link 16 .

In this way, when the cart frame is folded, the upper push rod 14 is rotated forward and moved closer to the lower push rod 15, so that the lower push rod 15 is rotated downward to move closer to the rear bracket 13, and the upper connecting rod 16 Rotate downward and move closer to the rear bracket 13, drive the seat plate 21 to slide backward relative to the strut 11, and simultaneously make the front connecting rod 17 and the rear connecting rod 18 relatively rotate closer, so that the front bracket 12 rotates backward and moves closer to the rear bracket 13 until The components that make up the cart frame are close together, as shown in Figure 8. When the seat plate 21 slides backward relative to the support rod 11 , the upper backrest 221 slides downward and moves closer to the lower backrest 222 through the action of the first belt 3 , so that the backrest assembly is folded synchronously.

When the stroller is unfolded from the folded state, the upper push rod 14 is rotated upward and backward away from the rear bracket 13 and the lower push rod 15, and the upper link 16 is rotated upward and away from the rear bracket 13, so that the seat plate 21 is driven relative to the support rod 11 Sliding forward, the front link 17 and the rear link 18 are relatively rotated away at the same time, so that the front bracket 12 is rotated forward and away from the rear bracket 13 until the cart frame is in an unfolded state. When the seat board 21 slides forward relative to the support rod 11 , the upper backrest 221 slides upwards due to the action of the second belt 4 , so that the backrest assembly is unfolded.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (11)

1. A child stroller, comprising a stroller frame with an unfolded state and a folded state and a seat assembly arranged on the stroller frame, the stroller frame includes a strut, and the seat assembly includes a A seat plate slidably arranged on the struts in the front-rear direction and a backrest assembly arranged at the rear of the seat plate, the backrest assembly includes a lower backrest connected to the rear of the seat plate and a backrest that can be moved along the The upper backrest is slidably arranged on the lower backrest in the up and down direction. When the baby stroller is unfolded and folded, the seat plate slides relative to the support bar. It is characterized in that: the baby stroller also includes When the seat board slides relative to the support rod, the driving mechanism drives the upper backrest to slide relative to the lower backrest, and the driving mechanism includes driving the seat board to slide relative to the support rod when the stroller is folded The first strap for the upper backrest to slide downward relative to the lower backrest and the second belt for driving the upper backrest to slide upward relative to the lower backrest when the stroller is unfolded and the seat plate slides in reverse relative to the support rod Two straps, one end of the first strap and the second strap are fixed on the upper backrest, and the first strap and the second strap slide through the lower backrest respectively. The backrest, the seat board and the support rod, the other ends of the first strap and the second strap are all fixedly arranged on the seat board, or, the first strap and the The second straps slide through the lower backrest and the seat board respectively, and the other ends of the first strap and the second strap are fixedly arranged on the support rod. 2. The baby stroller according to claim 1, characterized in that: the lower backrest is provided with a first perforation, the seat plate is provided with a second perforation, and the first strap extends from one end to Sliding through the first through hole and the second through hole in sequence, and sliding around the support bar, the other end thereof is fixedly arranged on the seat plate, or, the first strap is connected from one end The other end of the part slides downwards sequentially through the first through hole and the second through hole and is fixedly arranged on the support rod. 3. The stroller according to claim 2, characterized in that: when the stroller is in the unfolded state, the part of the first strap between one end and the first hole is located at the first hole. The back of the backrest assembly, the part of the first belt between the first through hole and the second through hole is located above the seat plate and in front of the backrest assembly, the first belt A portion of the strap between the second perforation and the other end thereof is located below the seat plate. 4. The stroller according to claim 2, wherein the fixing point of the first strap on the upper backrest is located at the upper part of the upper backrest and above the first perforation, The fixing point of the first strap on the seat plate is located at the rear of the seat plate and behind the strut. 5. The baby stroller according to claim 2, wherein when the baby stroller is folded and the seat plate slides relative to the support rod, the first belt is located between the second perforation and its The length of the portion between the other end increases, and the length of the portion of the first strap located between one end and the first perforation decreases, so that the first strap pulls the upper backrest relative to the The lower backrest slides down. 6. The stroller according to claim 1, characterized in that: the lower backrest is provided with a third perforation, the seat plate is provided with a fourth perforation, and the second strap extends from one end to Slide down around the lower end of the upper backrest or slide through the lower part of the upper backrest, and slide up through the third through-hole and slide down through the fourth through-hole, then slide around through the strut The other end is fixedly arranged on the seat plate, or the second strap slides downward from one end around the lower end of the upper backrest or slides through the lower part of the upper backrest, and upwards After sliding through the third through hole and sliding down through the fourth through hole, the other end thereof is fixedly arranged on the support rod. 7. The stroller according to claim 6, wherein when the stroller is in the unfolded state, the part of the second belt between one end and the lower end of the upper backrest is located at Behind the upper backrest, the part of the second belt located between the lower end of the upper backrest and the third perforation is located in front of the upper backrest and behind the lower backrest, the second The part of the belt located between the third through hole and the fourth through hole is located above the seat plate and in front of the backrest assembly, and the second belt is located between the fourth through hole and the other part thereof. A portion between the one ends is located below the seat plate. 8. The stroller according to claim 6, wherein the fixing point of the second strap on the upper backrest is located at the lower part of the upper backrest and below the third perforation, The fixing point of the second strap on the seat plate is located at the front of the seat plate and in front of the strut. 9. The stroller according to claim 6, wherein when the stroller is unfolded and the seat plate slides in reverse relative to the support rod, the second belt is located at the fourth hole. The length of the portion between the upper backrest and the other end increases, and the length of the portion between the lower end of the upper backrest and the third perforation of the second drawstring decreases, so that the second drawstring pulls the The upper backrest slides upward relative to the lower backrest. 10. The stroller for children according to claim 1, characterized in that: the first strap and the second strap are respectively arranged on the left and right sides. 11. The stroller according to claim 1, characterized in that: the seat assembly further comprises cloth covers covering the seat board and the backrest assembly respectively, the first belt and the The second drawstrings are located in the cloth cover.

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