Baby stroller

Abstract

The utility model discloses a child stroller which comprises a stroller frame and a seat mechanism arranged on the stroller frame, the seat mechanism comprises a seat part and a backrest part, the seat part is rotationally connected with the stroller frame, and the seat part can be arranged in a sliding mode relative to the stroller frame; the seat mechanism further comprises a linkage structure, the linkage structure comprises a linkage connecting piece and a connecting sliding piece, one end of the linkage connecting piece is rotationally connected with the seat part, and the other end of the linkage connecting piece is rotationally connected with the backrest part. The connecting sliding piece is rotatably mounted on the seat part or the connecting sliding piece is rotatably mounted on the stroller frame; the linkage connecting piece and the connecting sliding piece are arranged in a sliding mode. The baby stroller is compact in structure and small in size after being folded; and the backrest part can be of an integral structure, so that the production process is simple, the production cost is low, and the structural strength is high when the stroller is unfolded for use.

Description

TECHNICAL FIELD

[0001] The utility model relates to children's products technical field, specifically relate to a children's pushchair. BACKGROUND

[0002] The children's pushchair generally includes a pushchair frame and a seat mechanism arranged on the pushchair frame, to facilitate folding of the children's pushchair, the seat mechanism of part of the children's pushchair can be folded with the pushchair frame. The seat mechanism includes a seat and a backrest, and the seat and the backrest can rotate relative to each other when the children's pushchair is folded. When the children's pushchair is folded, part of the children's pushchair has the problem that the backrest extends downward below the wheels after folding, thereby making the structure of the folded children's pushchair relatively large.

[0003] Therefore, in the prior art, part of the children's pushchair is designed as two parts, and the two parts are rotationally connected, so that when the children's pushchair is folded, the backrest can be brought together by relative rotation between the two parts to reduce its length. The structure of the backrest has relatively poor structural strength when the children's pushchair is unfolded for use, thereby reducing the safety performance of the children's pushchair; at the same time, the production cost of the backrest is relatively high, which is not conducive to mass production of the children's pushchair. SUMMARY

[0004] The utility model aims at the deficiency in the prior art, and provides a children's pushchair with good structural strength and low production cost.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] A children's pushchair includes a pushchair frame and a seat mechanism arranged on the pushchair frame, the seat mechanism includes a seat part and a backrest part, the seat part is rotationally connected with the pushchair frame, and the seat part is slidably arranged relative to the pushchair frame.

[0007] The seat mechanism further includes a linkage structure, the linkage structure includes a linkage connecting piece and a connecting sliding piece, one end of the linkage connecting piece is rotationally connected with the seat part, the other end of the linkage connecting piece is rotationally connected with the backrest part, and the connecting sliding piece is rotationally installed on the seat part or the connecting sliding piece is rotationally installed on the pushchair frame; the linkage connecting piece and the connecting sliding piece are slidably arranged.

[0008] In some embodiments, when the children's pushchair is folded, the front end of the seat part is lifted upward, the linkage structure drives the backrest part to move upward and in a direction of approaching the seat part, and the linkage structure is folded between the seat part; after the children's pushchair is folded, the upper surface of the seat part is opposite to the back surface position of the backrest part.

[0009] In some embodiments, the seat part comprises a seat plate and seat rods arranged on opposite sides of the seat plate, the stroller frame is provided with seat rod sliders slidingly arranged with the seat rods, the seat rod sliders are rotationally mounted on the stroller frame;

[0010] The stroller frame is further provided with a driving rod movably mounted on the rear end of the seat rod, when the stroller is folded, the driving rod is flipped in the clockwise direction and drives the seat rod to slide along the seat rod sliders rearward and downward, meanwhile, the seat rod sliders rotate relative to the stroller frame.

[0011] In some embodiments, the seat rod sliders comprise first sliding sleeves slidingly arranged on the seat rods, the seat part is further provided with a seat plate support rod extending parallel to the seat rods, a gap space for the first sliding sleeves to slide is arranged between the seat plate support rod and the seat rods, and the seat plate is fixed on the seat plate support rod.

[0012] In some embodiments, the linkage connector comprises a linkage rod, both ends of the linkage rod are rotationally connected with the backrest part and the seat part respectively, the connecting slider comprises a second sliding sleeve rotationally mounted on the seat rod slider, the second sliding sleeve is slidingly arranged on the linkage rod, and the seat plate support rod is located between the connecting slider and the seat rod slider.

[0013] In some embodiments, in the front-rear direction, the length of the seat plate is less than the length of the seat rods, the seat plate support rod is provided with an intermediate connecting part connected with the rear end of the seat plate, and the linkage connector is rotationally connected with the intermediate connecting part.

[0014] The seat part is further provided with an extension seat plate rotationally connected between the seat plate and the backrest part, when the stroller is unfolded, the extension seat plate is located rearward of the seat plate, and the seat plate and the extension seat plate are sequentially connected; when the stroller is folded, the extension seat plate moves with the backrest part towards the seat plate, the extension seat plate is folded between the seat plate and the backrest part, and the upper surface of the extension seat plate is close to and opposite to the upper surface of the seat plate.

[0015] In some embodiments, the extension seat plate is rotationally connected with the intermediate connecting part and fixedly connected with the linkage connector.

[0016] In some embodiments, when the stroller is unfolded, the seat rod sliders are located at the rear part of the seat rods, and the connecting sliders are located at the front part of the linkage connectors; when the stroller is folded, the seat rod sliders slide forward along the seat rods, and the connecting sliders slide rearward along the linkage connectors.

[0017] In some embodiments, the trolley frame includes a front support, a rear support, an upper push rod, a lower push rod, and a drive rod; two of the front support, the rear support, and the lower push rod are rotatably connected, and the third is rotatably connected to either of the aforementioned two, or the aforementioned three are coaxially rotatably connected; the lower part of the upper push rod is rotatably connected to the upper part of the lower push rod; the upper part of the drive rod is rotatably connected to the lower part of the upper push rod, the drive rod is rotatably connected to the rear support, the seat is rotatably connected to the drive rod, and a seat plate slider is slidably disposed on the seat and rotatably connected to the connecting slider, the seat plate slider being rotatably connected to the lower push rod.

[0018] In some embodiments, the trolley frame further includes a connecting rod, one end of which is rotatably connected to the front support, and the other end of which is rotatably connected to the drive rod.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: When the stroller of this utility model is folded, as the seat rotates backward and downward under the drive of the stroller frame, the connecting sliding member causes the linkage connecting member to rotate upward around the rotating connection point with the seat, thereby causing the connection point between the linkage connecting member and the backrest to move upward, thus causing the backrest to move upward as a whole. In this way, after the stroller is folded, the lower part of the backrest will not protrude under the wheels, making the folded stroller compact and small in size. The backrest can be designed as a single structure, thus ensuring its structural strength when the stroller is unfolded and improving its safety performance. Moreover, because the backrest is a single structure, its manufacturing process is simple and the production cost is relatively low. Attached Figure Description

[0020] Appendix Figure 1 This is a three-dimensional schematic diagram of the stroller in the unfolded state according to this embodiment;

[0021] Appendix Figure 2 This is a side view of the stroller in the unfolded state according to this embodiment;

[0022] Appendix Figure 3 This is a cross-sectional view of the stroller in the unfolded state according to this embodiment.

[0023] Appendix Figure 4 This is one of the three-dimensional schematic diagrams of the stroller during the folding process in this embodiment;

[0024] Appendix Figure 5 This is one of the side view diagrams of the stroller in the folding process of this embodiment;

[0025] Appendix Figure 6 This is one of the cross-sectional schematic diagrams of the stroller in this embodiment during the folding process;

[0026] Fig. 2 is a perspective view of the child stroller of the present embodiment in a folded state; Figure 7 Fig. 3 is a side view of the child stroller of the present embodiment in a folded state;

[0027] Fig. 4 is a cross-sectional view of the child stroller of the present embodiment in a folded state; Figure 8 Fig. 5 is a perspective view of the child stroller of the present embodiment in a folded state;

[0028] Fig. 6 is a side view of the child stroller of the present embodiment in a folded state; Figure 9 Fig. 7 is a cross-sectional view of the child stroller of the present embodiment in a folded state;

[0029] Fig. 8 is a perspective view of the child stroller of the present embodiment in a folded state; Figure 10 Fig. 9 is a side view of the child stroller of the present embodiment in a folded state; Fig. 10 is a cross-sectional view of the child stroller of the present embodiment in a folded state;

[0030] Fig. 11 is an exploded view of the child stroller of the present embodiment; Figure 11 Fig. 12 is a perspective view of the seat portion of the present embodiment; Fig. 13 is a perspective view of the seat plate slide of the present embodiment;

[0031] Fig. 14 is a perspective view of the connecting slide of the present embodiment. Figure 12 Fig. 15 is a perspective view of the connecting slide of the present embodiment.

[0032] Fig. 16 is a perspective view of the child stroller of the present embodiment in a folded state; Figure 13 Fig. 17 is an exploded view of the child stroller of the present embodiment;

[0033] Fig. 18 is a perspective view of the seat portion of the present embodiment; Figure 14 Fig. 19 is a perspective view of the seat plate slide of the present embodiment; Fig. 20 is a perspective view of the connecting slide of the present embodiment.

[0034] Fig. 21 is a perspective view of the connecting slide of the present embodiment. Figure 15 Fig. 22 is a perspective view of the child stroller of the present embodiment in a folded state;

[0035] Fig. 23 is an exploded view of the child stroller of the present embodiment; Figure 16 Fig. 24 is a perspective view of the seat portion of the present embodiment; Fig. 25 is a perspective view of the seat plate slide of the present embodiment;

[0036] Fig. 26 is a perspective view of the connecting slide of the present embodiment. DETAILED DESCRIPTION

[0037] The technical scheme of the utility model will be further described below with reference to the drawings and specific embodiments.

[0038] In the following description, the directions such as "front", "back", "left", "right", "up", "down" are all according to Figure 2 the left direction in the drawing is "front", the right direction is "back", the upper direction is "up" and the lower direction is "down". The directions are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0039] As shown in Figures 1-13 the utility model discloses a child stroller which comprises a stroller frame and a seat mechanism arranged on the stroller frame.

[0040] The seat mechanism comprises a seat part 21, a backrest part 22 and a linkage structure, and the linkage structure comprises a linkage connecting piece 23 and a connecting sliding piece 24.

[0041] The seat part 21 is rotationally connected to the stroller frame, and the seat part 21 can also slide relative to the stroller frame.

[0042] The linkage connecting piece 23 is arranged between the seat part 21 and the backrest part 22, one end of the linkage connecting piece 23 is rotationally connected to the seat part 21 through a first rotation shaft 301, and the other end is rotationally connected to the backrest part 22 through a second rotation shaft 302.

[0043] The connecting sliding piece 24 is slidingly arranged on the linkage connecting piece 23, and the connecting sliding piece 24 is rotationally installed on the seat part 21 or the stroller frame.

[0044] In this embodiment, a seat plate sliding piece 25 is slidingly arranged on the seat part 21, and the seat plate sliding piece 25 is rotationally connected to the stroller frame. The seat plate sliding piece 25 is rotationally connected to the connecting sliding piece 24 through a third rotation shaft 303.

[0045] In this embodiment, when the child stroller is folded, the front end of the seat part 21 is lifted upward, the linkage structure drives the backrest part 22 to move upward and in the direction of approaching the seat part 21, and the linkage structure is folded between the seat part 21 and the backrest part 22. After the child stroller is folded, the upper surface of the seat part 21 is opposite to the back surface position of the backrest part 22. In this way, the lower part of the backrest part 22 does not extend below the wheels after the child stroller is folded, so that the structure of the child stroller after being folded is compact and small in size, and the backrest part 22 can be arranged as an integral structure to improve the structural strength of the child stroller in the unfolded state.

[0046] Of course, in other embodiments, the front end of the seat portion 21 can also be moved downward when the stroller is folded, so that the back portion 22 can also be moved upward, so that the lower part of the back portion 22 does not extend below the wheels when the stroller is folded, and the lower surface of the seat portion 21 is opposite the back surface of the back portion 22 when the stroller is folded.

[0047] In this embodiment, the seat portion 21 includes seat rods 211 respectively arranged on the left and right sides. The seat plate sliding members 25 are respectively slidingly arranged on the seat rods 211 on the left and right sides. Each seat plate sliding member 25 includes a first sliding sleeve 251, which is respectively sleeved on the seat rod 211 on the corresponding side and is slidingly arranged along the length extension direction of the seat rod 211. When the stroller is in the unfolded state, the seat rod 211 extends in the front-rear direction, and the first sliding sleeve 251 is located at the rear part of the seat rod 211 on the seat rod 211, as shown in Figures 1-3 .

[0048] The linkage connecting member 23 and the connecting sliding member 24 are also respectively arranged on the left and right sides. Each connecting sliding member 24 includes a second sliding sleeve 241, which is respectively sleeved on the linkage connecting member 23 on the corresponding side and is slidingly arranged along the length extension direction of the linkage connecting member 23. When the stroller is in the unfolded state, the linkage connecting member 23 extends in the front-rear direction, and the second sliding sleeve 241 is located at the front part of the linkage connecting member 23 on the linkage connecting member 23, as shown in Figures 1-3 .

[0049] As shown in Figure 14 , the seat portion 21 further includes a seat plate support rod 212, which is arranged in parallel with the seat rod 211. A gap space for the first sliding sleeve 251 to slide is arranged between the seat plate support rod 212 and the seat rod 211. In this embodiment, the seat plate support rod 212 is respectively fixedly arranged on the left side or the right side of each seat rod 211 and is located on the inner side of the seat rod 211. The seat plate support rod 212 is provided with an intermediate connecting portion 212a, and one end of the linkage connecting member 23 is rotationally connected to the intermediate connecting portion 212a through a first rotating shaft 301. In this way, the rotating connection between the linkage connecting member 23 and the seat portion 21 is arranged on the seat plate support rod 212, so as not to affect the sliding stroke of the first sliding sleeve 251 along the seat rod 211, thereby not affecting the folding and unfolding operations of the stroller. When the stroller is in the unfolded state, in the left-right direction, the second sliding sleeve 241 is located on the inner side of the first sliding sleeve 251, and the seat plate support rod 212 is located between the first sliding sleeve 251 and the second sliding sleeve 241, as shown in Figures 1-3 .

[0050] As shown in Figure 14As shown, the seat part 21 further comprises a seat plate 213, the left and right sides of which are fixedly connected with the seat rod 211 and / or the seat plate support rod 212 of the corresponding side respectively. In this embodiment, in the front-rear direction, the length of the seat plate 213 is less than the length of the seat rod 211, and the rear part of the seat plate 213 is fixedly connected with the middle connecting part 212a.

[0051] The seat mechanism further comprises an extension seat plate 26, which is rotatably connected between the seat plate 213 and the backrest part 22. In this embodiment, the left and right sides of the extension seat plate 26 are fixedly connected with the linkage connecting part 23 of the corresponding side respectively, and the extension seat plate 26 is rotatably connected with the middle connecting part 212a.

[0052] In this embodiment, the front part of the seat rod 211, the front part of the seat plate support rod 212 and the front part of the seat plate 213 are fixedly connected by the first pin shaft 27, and the rear part of the seat rod 211 and the rear part of the seat plate support rod 212 are fixedly connected by the second pin shaft 28. The middle connecting part 212a, the front part of the linkage connecting part 23, the rear part of the seat plate 213 and the front part of the extension seat plate 26 are connected by the first rotating shaft 301, wherein the middle connecting part 212a and the seat plate 213 are fixed relative to each other, and the linkage connecting part 23 and the extension seat plate 26 are fixed relative to each other. The rear part of the linkage connecting part 23, the lower part of the backrest part 22 and the rear part of the extension seat plate 26 are connected by the second rotating shaft 302, wherein the linkage connecting part 23 and the extension seat plate 26 are fixed relative to each other.

[0053] When the stroller is in the unfolded state, the extension seat plate 26 is located behind the seat plate 213, the seat plate 213 and the extension seat plate 26 are sequentially connected, and the upper end faces of the seat plate 213 and the extension seat plate 26 are located in the same plane. In this way, the seating space for the child can be increased, thereby increasing the comfort of the seat.

[0054] When the stroller is folded, the extension seat plate 26 moves with the linkage connecting part 23 towards the seat plate 213, the extension seat plate 26 is folded between the seat plate 213 and the backrest part 22, and the upper surface of the extension seat plate 26 is close to and opposite to the upper surface of the seat plate 213.

[0055] In other embodiments, the seat plate 213 and the extension seat plate 26 can be replaced by cloth covers. Of course, the extension seat plate 26 can also not be provided, and the seat plate 213 can also be extended to a certain distance in the area between the linkage connecting parts 23 on the left and right sides to increase the seating space.

[0056] In this embodiment, the backrest part 22 is a whole backrest plate, and the backrest part 22 can also be provided as a whole frame, and a cloth cover is provided on the frame for the child to lean against. This makes the overall structural strength of the seat mechanism of the stroller better when the stroller is unfolded for use, and the processing technology of the seat mechanism is simple and the production cost is low.

[0057] As shown in Figure 15 The seat plate sliding member 25 further comprises a first connecting part 252 extending upward from the upper portion of the first sliding sleeve 251. As shown in Figure 16 The connecting sliding member 24 further comprises a second connecting part 242 extending upward from the upper portion of the second sliding sleeve 241, and the first connecting part 252 is rotationally connected with the second connecting part 242. In this embodiment, the second connecting part 242 extends upward and simultaneously extends outward of the second sliding sleeve 241, so that the positions of the first sliding sleeve 251 and the second sliding sleeve 242 in the front-rear direction correspond to each other when the stroller is in the unfolded state, so that the appearance of the stroller is beautiful, and the structural strength of the seat mechanism is better.

[0058] As shown in Figure 15 The seat plate sliding member 25 further comprises a third connecting part 253 extending downward from the lower portion of the first sliding sleeve 251 and extending outward of the first sliding sleeve 251, and the third connecting part 253 is rotationally connected with the stroller frame.

[0059] In this embodiment, a structure of a stroller frame is provided, which is as follows:

[0060] The stroller frame comprises a front support 11, a rear support 12, an upper push rod 13, a lower push rod 14 and a driving rod 15.

[0061] Two of the upper portion of the front support 11, the upper portion of the rear support 12 and the lower portion of the lower push rod 14 are rotationally connected, the third one is rotationally connected with any one of the aforementioned two, or the aforementioned three are coaxially rotationally connected. In this embodiment, the upper portion of the front support 11 is rotationally connected with the upper portion of the rear support 12 through a fourth rotation shaft 304, and the upper portion of the rear support 12 is rotationally connected with the lower portion of the lower push rod 14 through a fifth rotation shaft 305. When the stroller is in the unfolded state, the fifth rotation shaft 305 is located above the fourth rotation shaft 304 on the rear support 12, as shown in Figures 1-3 .

[0062] The lower portion of the upper push rod 13 is rotationally connected with the upper portion of the lower push rod 14 through a sixth rotation shaft 306. The lower portion of the lower push rod 14 is provided with a fourth connecting part 141 extending leftward or rightward and inward of the stroller, and the third connecting part 253 is rotationally connected with the fourth connecting part 141 through a seventh rotation shaft 307. When the stroller is in the unfolded state, the seventh rotation shaft 307 is located above the fifth rotation shaft 305 and below the sixth rotation shaft 306 on the lower push rod 14, as shown in Figures 1-3 .

[0063] The upper part of the driving rod 15 is rotationally connected with the lower part of the upper push rod 13 through an eighth rotating shaft 308, the driving rod 15 is rotationally connected with the rear support 12 through a ninth rotating shaft 309, and the rear part of the seat rod 211 is rotationally connected with the driving rod 15 through a tenth rotating shaft 310. When the stroller is in the unfolded state, the eighth rotating shaft 308, the tenth rotating shaft 310 and the ninth rotating shaft 309 are sequentially arranged from top to bottom on the driving rod 15, as shown in Figures 1-3 .

[0064] The stroller frame further comprises a connecting rod 16, the lower part of the driving rod 15 extends forward from the connection with the rear support 12 to form an extension 151, one end of the connecting rod 16 is rotationally connected with the front support 11, and the other end of the connecting rod 16 is rotationally connected with the extension 151.

[0065] The structure of the stroller frame is not limited to that in the embodiment, and other structures can also be adopted.

[0066] When the stroller is folded from the unfolded state, the upper push rod 13 is rotated forward and downward, the lower push rod 14 is rotated downward around the fifth rotating shaft 305 to approach the rear support 12, and the driving rod 15 is rotated downward around the ninth rotating shaft 309 to approach the rear support 12. When the driving rod 15 rotates, the front support 11 is pulled backward and rotated around the connecting rod 16 to approach the rear support 12. At the same time, the seat part 21 is moved backward and downward under the driving of the driving rod 15, the seat plate sliding member 25 is slid forward along the seat rod 211 and is rotated relative to the lower push rod 14, and the connecting sliding member 24 is slid backward along the linkage connecting member 23. At the same time, the linkage connecting member 23 is rotated upward around the first rotating shaft 301 under the action of the seat plate sliding member 25 and the connecting sliding member 24, the extended seat plate 26 approaches the seat plate 213, which makes the second rotating shaft 302 move upward, i.e. the backrest part 22 is pulled upward as a whole, and the backrest part 22 is gradually retracted into the stroller frame, and the folding process is as shown in Figures 4-9 . Until the various rod members and the seat mechanism constituting the stroller frame are closely approached together, and the final folding is as shown in Figures 10-12 . In the folded stroller, the lower part of the backrest part 22 is located above the wheel assembly, so that the structure of the stroller is compact, flat and small in volume, and is convenient to carry and store.

[0067] The above embodiment is only for illustrating the technical concept and characteristics of the utility model, and its purpose is to enable those skilled in the art to understand the content of the utility model and to implement it, and it cannot limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.

Claims

1. A children's stroller, characterized in that: The invention includes a trolley frame and a seating mechanism disposed on the trolley frame. The seating mechanism includes a seat and a backrest. The seat is rotatably connected to the trolley frame and is slidably disposed relative to the trolley frame. The seating mechanism further includes a linkage structure, which includes a linkage connector and a connecting slide. One end of the linkage connector is rotatably connected to the seat portion, and the other end of the linkage connector is rotatably connected to the backrest. The connecting slide is rotatably mounted on the seat portion or on the trolley frame. The linkage connector and the connecting slide are slidably disposed.

2. The stroller according to claim 1, characterized in that: When the stroller is folded, the front end of the seat is raised, and the linkage structure drives the backrest to move upward and toward the seat. The linkage structure is folded between the seat and the backrest. After the stroller is folded, the upper surface of the seat is opposite to the back of the backrest.

3. The stroller according to claim 2, characterized in that: The seat includes a seat plate and seat rods disposed on opposite sides of the seat plate. The trolley frame is provided with a seat rod sliding member that is slidably disposed with the seat rods. The seat rod sliding member is rotatably mounted on the trolley frame. The stroller frame also has a drive rod movably mounted at the rear end of the seat post. When the stroller is folded, the drive rod rotates clockwise and drives the seat post to slide backward and downward along the seat post slider. At the same time, the seat post slider rotates relative to the stroller frame.

4. The stroller according to claim 3, characterized in that: The seat post sliding member includes a first sliding sleeve that is slidably sleeved outside the seat post. The seat portion also has a seat plate support rod that extends parallel to the seat post. A gap space is provided between the seat plate support rod and the seat post for the first sliding sleeve to slide. The seat plate is fixed on the seat plate support rod.

5. The stroller according to claim 4, characterized in that: The linkage connector includes a linkage rod, the two ends of which are rotatably connected to the backrest and the seat, respectively. The connecting sliding member includes a second sliding sleeve rotatably mounted on the seat rod sliding member. The second sliding sleeve is slidably sleeved on the linkage rod. The seat plate support rod is located between the connecting sliding member and the seat rod sliding member.

6. The stroller according to claim 4, characterized in that: In the front-to-back direction, the length of the seat plate is less than the length of the seat rod, and the seat plate support rod is provided with an intermediate connecting part that connects to the rear end of the seat plate. The linkage connector is rotatably connected to the intermediate connecting part. The seat portion also has an extension seat plate rotatably connected between the seat plate and the backrest. When the stroller is in the unfolded state, the extension seat plate is located behind the seat plate, and the seat plate and the extension seat plate are connected in sequence. When the stroller is folded, the extended seat plate moves toward the seat plate along with the linkage connector, and the extended seat plate is folded between the seat plate and the backrest. The upper surface of the extended seat plate is close to and opposite to the upper surface of the seat plate.

7. The stroller according to claim 6, characterized in that: The extended seat plate is rotatably connected to the intermediate connecting part and is fixedly connected to the linkage connecting member.

8. The stroller according to claim 3, characterized in that: When the stroller is in the unfolded state, the seat post slider is located at the rear of the seat post, and the connecting slider is located at the front of the linkage connector; when the stroller is folded, the seat post slider slides forward along the seat post, and the connecting slider slides backward along the linkage connector.

9. The stroller according to any one of claims 1 to 8, characterized in that: The trolley frame includes a front support, a rear support, an upper push rod, a lower push rod, and a drive rod; two of the front support, the rear support, and the lower push rod are rotatably connected, and the third is rotatably connected to either of the aforementioned two, or the aforementioned three are coaxially rotatably connected; the lower part of the upper push rod is rotatably connected to the upper part of the lower push rod; the upper part of the drive rod is rotatably connected to the lower part of the upper push rod, the drive rod is rotatably connected to the rear support, the seat is rotatably connected to the drive rod, and a seat plate slider is slidably disposed on the seat and rotatably connected to the connecting slider; the seat plate slider is rotatably connected to the lower push rod.

10. The stroller according to claim 9, characterized in that: The trolley frame also includes a connecting rod, one end of which is rotatably connected to the front support, and the other end of which is rotatably connected to the drive rod.

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