Stroller

Abstract

The stroller comprises a stroller frame with an unfolded state and a folded state, the stroller frame comprises a front support, a rear support and a push rod assembly, the upper portion of the front support is rotatably connected with the upper portion of the rear support, and the lower portion of the push rod assembly is slidably connected with the upper portion of the front support. The stroller further comprises a seat assembly arranged on the stroller frame, the seat assembly comprises a seat frame, a pull rope and a cloth cover, in the unfolded state, the pull rope is supported between the seat frame and the push rod assembly, the cloth cover is arranged between the pull rope and the seat frame, and a bearing space with a forward opening is defined by the cloth cover and the seat frame. The front support and the push rod assembly are integrally in an arc shape and are arched in the direction away from the seat frame, and the curvature radius of the arc shape is 0.3-5 m. When the baby stroller is unfolded for use, the gravity center of the baby stroller can be close to the center of the baby stroller, so that the baby stroller is good in stability in the unfolded state and not prone to turning backwards. And moreover, the sitting comfort of the seat assembly is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to children's articles technical field, concretely relates to a children's pushchair. BACKGROUND

[0002] Children's pushchair is generally used when adults take children out. Children's pushchair generally includes pushchair frame, and pushchair frame includes front support, rear support and push rod. In the prior art, the front support and the push rod of most children's pushchairs are straight rod structures, and the front support and the push rod extend along the same straight line direction when the children's pushchair is in the unfolded state. When the angle between the front support and the rear support of the children's pushchair with this structure is large, the inclination degree of the front support and the push rod relative to the vertical plane is large, which easily makes the center of gravity of the children's pushchair move backward and easily causes the children's pushchair to overturn. Moreover, for the cloth children's pushchair, the pull rope is arranged between the seat and the upper part of the push rod, and when the front support and the push rod are straight rod structures, the inclination degree of the pull rope is large, thereby making the comfort of the children's pushchair when being ridden poor. SUMMARY

[0003] The utility model aims at the deficiency in the prior art, and provides a children's pushchair with good stability and high comfort.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0005] A children's pushchair includes a pushchair frame with an unfolded state and a folded state, the pushchair frame includes a front support, a rear support and a push rod assembly, the upper part of the front support is rotationally connected with the upper part of the rear support, the lower part of the push rod assembly is slidingly connected with the upper part of the front support, the children's pushchair further includes a seat assembly arranged on the pushchair frame, the seat assembly includes a seat frame, a pull rope and a cloth cover, in the unfolded state, the pull rope is supported between the seat frame and the push rod assembly, the cloth cover is arranged between the pull rope and the seat frame, and the cloth cover and the seat frame enclose a load-bearing space with a forward opening; the front support and the push rod assembly as a whole are arc-shaped and arch upward in a direction away from the seat frame, and the curvature radius of the arc shape is 0.3-5m.

[0006] In some embodiments, the seat frame is movably arranged on the front support, and the seat assembly further has a linkage mechanism arranged between the seat frame and the rear support, and the linkage mechanism is movably connected with the rear support and the seat frame respectively;

[0007] When the rear support is folded toward the front support, the rear support drives the seat frame to fold toward the front support through the linkage mechanism;

[0008] When the rear support rotates towards the unfolded position, the rear support drives the seat support to move towards the unfolded position through the linkage mechanism.

[0009] In some embodiments, when the stroller is in the unfolded state, the height of the center of the seat support from the ground is 0.25-0.55 m.

[0010] In some embodiments, the greater the height of the center of the seat support from the ground, the greater the radius of curvature of the arc.

[0011] In some embodiments, when the stroller is in the unfolded state, the height of the center of the seat support from the ground is 0.3-0.45 m.

[0012] In some embodiments, the linkage mechanism comprises a connecting rod, one end of the connecting rod being rotatably connected to the front part of the seat support, and the other end of the connecting rod being rotatably connected to the upper part of the rear support.

[0013] The rear support is rotatably connected to the front support around a first axis, and part of the rear support extends to the other side of the first axis to form an extension part, and the connecting rod is rotatably installed on the extension part.

[0014] In some embodiments, the front support has a lumen adapted to the push rod assembly, and part of the push rod assembly is accommodated in the lumen in the folded state.

[0015] The push rod assembly comprises a push handle and a telescopic rod body, the push handle extends in the left-right direction as a whole, and one end of the telescopic rod body is fixedly arranged at the middle position of the push handle.

[0016] In some embodiments, the first end of the pull rope is fixedly arranged on the seat support, and the second end of the pull rope is arranged around the upper part of the push rod assembly and then fixedly arranged on the rear support, so that the pull rope is moved and tensioned when the rear support moves towards the unfolded position.

[0017] The upper part of the rear support is provided with a support winding part around which the pull rope can slide, and the second end of the pull rope is fixedly arranged on the seat support after being arranged around the support winding part.

[0018] Alternatively, the second end of the pull rope is fixedly arranged on the upper part of the rear support.

[0019] In some embodiments, the radius of curvature of the arc is 0.4-1 m.

[0020] In some embodiments, when the stroller is in the unfolded state, the included angle between the front support and the rear support is greater than 90 degrees.

[0021] In some embodiments, the front support comprises a front support rod and a first connecting piece fixedly arranged at an upper portion of the front support rod, the rear supports are respectively arranged at left and right sides, and upper portions of the rear supports on each side are respectively rotationally connected with corresponding side portions of the first connecting piece; the push rod assembly comprises an upper push rod and a lower push rod, a lower portion of the upper push rod is slidingly connected with an upper portion of the lower push rod, and a lower portion of the lower push rod is slidingly connected with an upper portion of the front support rod, and the front support rod, the lower push rod and the upper push rod all present an arc shape which is arched in a direction away from the seat frame.

[0022] Due to the use of the above technical solutions, the utility model has the following advantages compared with the prior art: the front support and the push rod assembly of the utility model are both arc-shaped, and the curvature radius of the arc shape is 0.3-5m, so that when the child stroller is unfolded and used, the center of gravity of the child stroller can be close to the center of the child stroller, the stability of the child stroller in the unfolded state is good, and the child stroller is not prone to overturning. Moreover, the inclination degree of the pull rope can be reduced, so that the comfort of the seat assembly when being ridden is improved. In addition, the length of the push rod assembly does not need to be too long to meet the requirement of the pushing height, and the structural volume of the child stroller can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] FIG. 1 is a perspective view of a child stroller according to the embodiment of the utility model in a folded state (with a cover and a handle removed, viewed from the front); Figure 1 FIG. 2 is a perspective view of the child stroller according to the embodiment of the utility model in the folded state (with the cover and the handle removed, viewed from the rear);

[0024] FIG. 3 is a front view of the child stroller according to the embodiment of the utility model in the folded state (with the cover and the handle removed); Figure 2 FIG. 4 is a perspective view of the child stroller according to the embodiment of the utility model in an unfolded state (with the cover and the handle removed, viewed from the front);

[0025] FIG. 5 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolded state (with the cover and the handle removed, viewed from the rear); Figure 3 FIG. 6 is a front view of the child stroller according to the embodiment of the utility model in the unfolded state (with the cover and the handle removed);

[0026] FIG. 7 is a sectional view of the child stroller according to the embodiment of the utility model along line A-A; Figure 4 FIG. 8 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolding process (with the cover and the handle removed, viewed from the front, and the pull rope in a pre-pulling state); Figure 3 FIG. 9 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolding process (with the cover and the handle removed, viewed from the rear, and the pull rope in the pre-pulling state);

[0027] FIG. 10 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolding process (with the cover and the handle removed, viewed from the front, and the pull rope in a pulling state); Figure 5 FIG. 11 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolding process (with the cover and the handle removed, viewed from the rear, and the pull rope in the pulling state);

[0028] FIG. 12 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolding process (with the cover and the handle removed, viewed from the front, and the pull rope in a post-pulling state); Figure 6 FIG. 13 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolding process (with the cover and the handle removed, viewed from the rear, and the pull rope in the post-pulling state);

[0029] FIG. 14 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolding process (with the cover and the handle removed, viewed from the front, and the pull rope in a post-pulling state); Figure 7 FIG. 15 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolding process (with the cover and the handle removed, viewed from the rear, and the pull rope in the post-pulling state);

[0030] FIG. 16 is a perspective view of the child stroller according to the embodiment of the utility model in the unfolding process (with the cover and the handle removed, viewed from the front, and the pull rope in a post-pulling state); Figure 8Front view of the stroller of the present embodiment during unfolding (the pull cord is in a pre-pulled state, the cover and the handle are removed);

[0031] Figure 2 is a perspective view of the stroller of the present embodiment during unfolding (the pull cord is in a pre-pulled state, the cover and the handle are removed); Figure 9 Figure 3 is a cross-sectional view along line A-A of the stroller of the present embodiment during unfolding; Figure 8 Figure 4 is a partial enlarged view of part A of the stroller of the present embodiment during unfolding;

[0032] Figure 5 is a perspective view of the stroller of the present embodiment during unfolding (the pull cord is in a natural state, the cover and the handle are removed, the first transition piece can slide relative to the side rods); Figure 10 Figure 6 is a cross-sectional view along line A-A of the stroller of the present embodiment during unfolding;

[0033] Figure 7 is a partial enlarged view of part A of the stroller of the present embodiment during unfolding; Figure 11 Figure 8 is a perspective view of the stroller of the present embodiment during unfolding (the pull cord is in a tensioned state, the cover and the handle are removed, the first transition piece can slide relative to the side rods); Figure 10 Figure 9 is a cross-sectional view along line A-A of the stroller of the present embodiment during unfolding;

[0034] Figure 10 is a partial enlarged view of part A of the stroller of the present embodiment during unfolding. Figure 12 Figure 11 is a perspective view of the stroller of the present embodiment after the handle is removed from the cover;

[0035] Figure 13 Figure 12 is a side view of the stroller of the present embodiment after the handle is removed from the cover; Figure 12 Figure 13 is a partial enlarged view of part A of the stroller of the present embodiment after the handle is removed from the cover;

[0036] Figure 14 is a perspective view of the stroller of the present embodiment after the handle is installed on the cover; Figure 14 Figure 15 is a side view of the stroller of the present embodiment after the handle is installed on the cover; Figure 13 Figure 16 is a partial enlarged view of part A of the stroller of the present embodiment after the handle is installed on the cover.

[0037] Figure 15

[0038] Figure 16 Figure 15

[0039] Figure 17 Figure 16

[0040] Figure 18

[0041] Figure 19 Figure 18

[0042] Figure 20

[0043] Figure 21

[0044] ​​​​​​​​​​​​​​​​​​​Figure 22 This is a three-dimensional schematic diagram (enlarged view) of the handrail in this embodiment;

[0045] Appendix Figure 23 This is a three-dimensional diagram of the stroller in this embodiment during the folding process (with the fabric cover, pull rope, and handlebars removed).

[0046] Appendix Figure 24 This is a side view of the stroller in this embodiment during the folding process (with the fabric cover, pull cord, and handlebars removed).

[0047] Appendix Figure 25 This is a three-dimensional schematic diagram of the stroller in the folded state of this embodiment (with the fabric cover, pull rope, and handlebars removed).

[0048] Appendix Figure 26 This is a side view of the stroller in the folded state of this embodiment (without the fabric cover, pull rope, and handle).

[0049] Wherein: 11. Front bracket; 111. Front support rod; 112. First connecting piece; 113. Second connecting piece; 113a. Protrusion; 114. Limiting part; 12. Rear bracket; 13. Push rod assembly; 131. Upper push rod; 132. Lower push rod; 133. Push handle; 1331. Crossbar; 1332. Side rod; 1332a. Third through hole; 1332b. Guide groove; 14. Connecting rod; 15. Rear crossbar; 16. First shaft; 2. Seat frame; 21. Third connecting piece; 22. Fourth connecting piece; 23. First through hole; 24. Second through hole; 25. Second shaft; 31. Front wheel assembly; 32. Rear wheel assembly; 41. Fabric sleeve; 411. Side; 411a. Bottom edge; 411b. Top; 411c. Bevel; 42. Pull rope; 51. Push rod winding part; 511. Slot; 52. Bracket winding part; 53. Seat frame winding part; 61. Drive component; 62. Nut; 7. Handrail; 71. Insertion part; 711. Chamfered part; 8. Mounting part; 81. Insertion slot; 9. Locking component; 91. Recess. Detailed Implementation

[0050] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0051] In the following description, the directions "front," "back," "left," "right," "up," and "down" all refer to... Figure 4In the drawings, the left side direction is "front", the right side direction is "rear", the upper side direction is "up", the lower side direction is "down", and the vertical paper plane direction is "left" and "right". The above-mentioned direction definitions are merely for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] As shown in Figures 1-26 The stroller comprises a stroller frame, a seat assembly arranged on the stroller frame, a front wheel assembly 31 arranged at the bottom front part of the stroller frame, and a rear wheel assembly 32 arranged at the bottom rear part of the stroller frame.

[0053] The stroller frame comprises a front support 11, a rear support 12, and a push rod assembly 13. The front wheel assembly 31 is arranged at the lower part of the front support 11, and the rear wheel assembly 32 is arranged at the lower part of the rear support 12. The upper part of the rear support 12 is rotationally connected to the upper part of the front support 11 about a first shaft 16. The lower part of the push rod assembly 13 is slidingly connected to the upper part of the front support 11, so that the push rod assembly 13 is slidingly arranged relative to the front support 11 along the length extension direction of the front support 11.

[0054] In the embodiment, the front support 11 comprises a front support rod 111 and a first connecting piece 112. The front support rod 111 is located at the middle part in the left-right direction of the stroller, and extends upward from front to back when the stroller frame is in the unfolded state. The front wheel assembly 31 is arranged at the lower part of the front support rod 111. The first connecting piece 112 is fixedly arranged at the upper part of the front support rod 111. The rear support 12 is arranged at the left and right sides of the first connecting piece 112 respectively. The upper part of each side of the rear support 12 is rotationally connected to the corresponding side of the first connecting piece 112 about the first shaft 16. The rear wheel assembly 32 is arranged at the lower part of each side of the rear support 12.

[0055] Preferably, the front support rod 111 has a lumen extending along the length direction thereof, and the push rod assembly 13 is slidingly arranged in the lumen of the front support rod 111 along the length extension direction of the lumen. The upper and lower ends of the lumen of the front support rod 111 are both open, so that the upper part of the push rod assembly 13 extends out of the upper part of the lumen, and the lower part of the push rod assembly 13 can be retracted into the lumen or extend out of the lower part of the lumen.

[0056] The push rod assembly 13 can comprise one rod member, or a telescopic rod body composed of a plurality of sequentially slidingly connected rod members.

[0057] In the embodiment, the telescopic rod body includes an upper push rod 131 and a lower push rod 132. The lower push rod 132 has a lumen extending along the length direction thereof, and the upper push rod 131 is slidably arranged in the lumen of the lower push rod 132 along the length direction of the lumen. The lower push rod 132 is slidably arranged in the lumen of the front support rod 111 along the length direction of the lumen, and the lower part of the lower push rod 132 can extend out of the lumen to the outside of the lumen from the lower part of the lumen of the front support rod 111.

[0058] The push rod assembly 13 further includes a push handle 133, and the upper end of the telescopic rod body is fixedly arranged at the middle part of the push handle 133. Specifically, the push handle 133 includes a cross rod 1331 extending along the left-right direction and side rods 1332 respectively extending forward from the left and right ends of the cross rod 1331. The upper end of the upper push rod 131 is fixedly arranged at the middle part of the cross rod 1331.

[0059] The seat assembly is for a child to sit on, and includes a seat frame 2 for the child to sit on, which is movably arranged on the front support 11. The seat assembly further includes a linkage mechanism arranged between the seat frame 2 and the rear support 12, and the linkage mechanism is movably connected with the rear support 12 and the seat frame 2 respectively. When the rear support 12 is folded towards the front support 11, the rear support 12 drives the seat frame 2 to fold towards the front support 11 through the linkage mechanism. When the rear support 12 is rotated to the unfolded position, the rear support 12 drives the seat frame 12 to move to the unfolded position through the linkage mechanism. In this way, when the stroller is unfolded or folded, the rotation of the rear support 12 can be linked to rotate the seat frame 2 relative to the front support 11, and the seat frame 2 does not need to be separately operated to rotate relative to the front support 11, so that the folding and unfolding operations of the stroller are convenient.

[0060] Specifically, the linkage mechanism includes a connecting rod 14. The rear part of the seat frame 2 is rotationally connected with the upper part of the front support 11 about the second shaft 25. One end of the connecting rod 14 is rotationally connected with the upper part of the rear support 12, and specifically, part of the rear support 12 extends upward to the other side of the first shaft 16 to form an extension, and one end of the connecting rod 14 is rotationally connected with the extension of the rear support 12. The other end of the connecting rod 14 is rotationally connected with the front part of the seat frame 2. In this way, a four-bar linkage mechanism is formed between the front support 11, the seat frame 2, the connecting rod 14 and the rear support 12, and when the rear support 12 is rotated relative to the front support 11, the seat frame 2 can be synchronously rotated relative to the front support 11.

[0061] In the embodiment, the upper portion of the front support rod 111 is further provided with a second connecting piece 113, which is located above the first connecting piece 112. The connecting rods 14 are arranged on the left and right sides respectively. The front portion of the seat frame 2 is provided with third connecting pieces 21 extending downward from the bottom of the seat frame 2 on the left and right sides respectively, and the middle portion of the rear portion of the seat frame 2 is provided with a fourth connecting piece 22 extending downward from the bottom of the seat frame 2. The second connecting piece 113 is rotationally connected with the fourth connecting piece 22 about a second axis 25, one end of each connecting rod 14 is rotationally connected with the upper portion of the corresponding rear support 12, and the other end of the connecting rod 14 is rotationally connected with the corresponding third connecting piece 21.

[0062] The seat assembly further comprises a cloth cover 41 and a pull rope 42. In the unfolded state of the stroller, the pull rope 42 is supported between the seat frame 2 and the push rod assembly 13. The cloth cover 42 is arranged between the pull rope 41 and the seat frame 2 and forms a load-bearing space with the seat frame 2, which is arranged with a forward opening. When the stroller is in the unfolded state, the pull rope 42 is in a taut state, so that the cloth cover 41 can be straightened without wrinkles, making the appearance of the stroller beautiful.

[0063] Specifically, the pull rope 42 is arranged between the seat frame 2 and the side rod 1332 of the push handle 133, one end of the pull rope 42 is fixedly arranged on the seat frame 2, and the other end of the pull rope 42 is arranged in cooperation with the rear support 12 after passing through the side rod 1332. When the stroller is unfolded from the folded state, when the push rod assembly 13 slides relative to the front support 11 to the unfolded position, the pull rope 42 is in a pre-tightened state, as shown in Figures 4-9 , which makes the unfolding operation of the push rod assembly 13 labor-saving and can be operated by one hand; when the push rod assembly 13 is unfolded, the rear support 12 and the front support 11 are relatively rotated when the push rod assembly 13 is pressed down, and when the rear support 12 is in the unfolded position, the pull rope 42 is in a tensioned state, as shown in Figures 1-5 , which makes it more labor-saving to unfold the stroller from the folded state.

[0064] In the embodiment, a setting mode of the pull rope 42 is given, but the setting mode of the pull rope 42 is not limited to the embodiment. The specific setting mode of the pull rope 42 in the embodiment is as follows:

[0065] As shown in Figure 2 , Figure 4 , Figure 7 and Figure 9As shown, one end of the pull cord 42 is fixedly mounted on the bottom front of the seat frame 2. The pull cord 42 extends upward from the bottom front of the seat frame 2, moves around the upper part of the side rod 1332, and then extends downward. The pull cord 42 then moves around the upper part of the rear support 12, and the other end of the pull cord 42 is fixedly mounted on the bottom rear of the seat frame 2. Alternatively, after the pull cord 42 moves around the upper part of the side rod 1332 and extends downward, it can remain stationary around the upper part of the rear support 12, with the other end directly fixed to the upper part of the rear support 12. The former solution is preferred, as it increases the travel distance of the pull cord 42 when the stroller is unfolded, making the unfolding operation of the stroller easier.

[0066] like Figure 4 and Figure 9 As shown, the stroller also includes a push rod winding part 51 and a bracket winding part 52. The push rod winding part 51 is provided on the side rod 1332. The bracket winding part 52 is provided on the upper part of the rear bracket 12, specifically, the bracket winding part 52 is provided on the extension of the rear bracket 12. The pull rope 42 extends upward from the bottom of the seat frame 2, and then sequentially moves around the push rod winding part 51 and the bracket winding part 52 before being fixed to the seat frame 2.

[0067] Preferably, the push rod winding portion 51 is rotatably connected to the side rod 1332, and the bracket winding portion 52 is rotatably connected to the upper part of the rear bracket 12. The push rod winding portion 51 and the bracket winding portion 52 can be rollers or rotating shafts, etc. Figure 4 and Figure 9 As shown. During the unfolding of the stroller, when the pull rope 42 moves relative to the side rod 1332 and the rear support 12, the push rod winding part 51 rotates relative to the side rod 1332, and the support winding part 52 rotates relative to the rear support 12. In this way, there is rolling contact between the pull rope 42 and the push rod winding part 51, and between the pull rope 42 and the support winding part 52. This reduces the friction between the two, reduces the wear of the pull rope 42, and makes the movement of the pull rope 42 smoother and less prone to jamming, making the unfolding operation of the stroller easier.

[0068] After the pull rope 42 extends downwards by moving around the upper part of the side rod 1332, it can also first move around the seat 2, and then move around the upper part of the rear support 12 or be fixedly set on the upper part of the rear support 12. This can guide the direction of the pull rope 42 and make the movement of the pull rope 42 smoother.

[0069] Specifically, such as Figure 2 and Figure 7As shown in the figure, the stroller also comprises a seat frame winding part 53. The seat frame winding part 53 is arranged at the rear of the seat frame 2, and the pull rope 42 is movably wound through the seat frame winding part 53. Preferably, the seat frame winding part 53 is rotationally connected with the seat frame 2, and the seat frame winding part 53 can also be a roller or a rotating shaft, etc. During the unfolding of the stroller, when the pull rope 42 moves relative to the seat frame 2, the seat frame winding part 53 can rotate relative to the seat frame 2, so that the pull rope 42 and the seat frame winding part 53 are also in rolling contact, which can also reduce the friction therebetween.

[0070] When the stroller is in the unfolded state, the second shaft 25 is arranged between the seat frame winding part 53 and the support winding part 52.

[0071] As shown in the figure, Figure 2 and Figure 7 , the front of the seat frame 2 is also provided with a first through hole 23, which penetrates the upper and lower end faces of the seat frame 2. The pull rope 42 extends leftward or rightward and outward from the fixing point at the bottom of the seat frame 2, passes through the first through hole 23, then extends upward, movably winds through the side rod 1332, and then extends downward. By arranging the first through hole 23 on the seat frame 2 and passing the pull rope 42 through the first through hole 23, the direction of the pull rope 42 can be guided.

[0072] As shown in the figure, Figure 1 and Figure 2 , the bottom of the rear of the seat frame 2 is also provided with a second through hole 24. The pull rope 42 extends downward from the side rod 1332, passes through the second through hole 24, and then extends rearward and movably winds through the rear of the seat frame 2. By arranging the second through hole 24 on the seat frame 2 and passing the pull rope 42 through the second through hole 24, the direction of the pull rope 42 can also be guided.

[0073] In this embodiment, as shown in the figure, Figures 5-7 , Figure 10 , Figure 11 , the pull ropes 42 are arranged on the left and right sides respectively, and the push rod winding parts 51 are rotationally arranged on the side rods 1332 on the left and right sides respectively. The support winding parts 52 are rotationally arranged on the upper parts of the rear supports 12 on each side. The seat frame winding parts 53 are rotationally arranged on the left and right sides of the rear of the seat frame 2 respectively. One end of each side of the pull rope 42 is fixedly arranged on the corresponding side of the seat frame 2, extends upward after passing through the first through hole 23, extends downward after movably winding through the corresponding push rod winding part 51, extends rearward after passing through the second through hole 24, extends forward after movably winding through the corresponding seat frame winding part 53, and extends forward after movably winding through the corresponding support winding part 52, and the other end of the pull rope 42 is fixedly arranged on the corresponding side of the seat frame 2. Alternatively, the pull rope 42 extends forward after movably winding through the corresponding seat frame winding part 51, and the other end thereof is directly fixedly arranged on the upper part of the corresponding rear support 12.

[0074] Preferably, one or more of the push rod winding part 51, the support winding part 52 and the seat frame winding part 53 can slide relative to the part provided thereon to adjust the position, so that the pull rope 42 can be moved synchronously to change the length of the pull rope 42, thereby adjusting the tightness of the pull rope 42.

[0075] The following describes an example in which the push rod winding part 51 can slide relative to the side rod 1332. Specifically, as shown in Figure 13 、 Figure 14 、 Figure 16 、 Figure 17 、 Figure 13 and Figure 14 , the side rod 1332 is provided with a third through hole 1332a, and after the pull rope 42 is sleeved on the push rod winding part 51, the two end portions thereof extend downward from the third through hole 1332a respectively. When the push rod winding part 51 moves relative to the side rod 1332, the length of the pull rope 42 between the third through hole 1332a and the push rod winding part 51 can be changed, thereby achieving the effect of adjusting the tightness of the pull rope 42.

[0076] The push rod winding part 51 cooperates with the pull rope 42 in the following manner: the push rod winding part 51 is provided with a slot 511, and the pull rope 42 is movably arranged in the slot 511, as shown in Figure 16 、 Figure 17 、 Figure 13 and Figure 14 . Such a cooperation manner makes the pull rope 42 not easy to come out of the slot 511, so as to ensure that the push rod winding part 51 moves relative to the stroller frame to drive the pull rope 42 to move synchronously.

[0077] The side rod 1332 is further provided with a guide groove 1332b cooperating with the push rod winding part 51, the guide groove 1332b extends along the sliding direction of the push rod winding part 51, i.e., extends along the front-rear direction, and the push rod winding part 51 is slidably arranged in the guide groove 1332b along the length extension direction of the guide groove 1332b, as shown in Figure 16 、 Figure 17 、 Figure 13 and Figure 14 .

[0078] The third through hole 1332a communicates with the guide groove 1332b, and the third through hole 1332a can be close to the front end portion of the guide groove 1332b, as shown in Figure 16 、 Figure 17 、 Figure 13 and Figure 14As shown. Thus, when the push rod winding portion 51 slides backward along the guide groove 1332b, the length of the pull rope 42 between the third through hole 1332a and the push rod winding portion 51 increases, causing the pull rope 42 to tighten. Conversely, when the push rod winding portion 51 slides forward along the guide groove 1332b, the length of the pull rope 42 between the third through hole 1332a and the push rod winding portion 51 decreases, causing the pull rope 42 to slack.

[0079] Of course, the third through hole 1332a can also be set near the rear end of the guide groove 1332b. In this way, when the push rod winding part 51 slides forward along the guide groove 1332b, the pull rope 42 is tensioned; when the push rod winding part 51 slides backward along the guide groove 1332b, the pull rope 42 is relaxed.

[0080] The stroller also includes a drive unit 61, which is rotatably or slidably mounted on the side rod 1332. The drive unit 61 cooperates with the push rod winding part 51. When the drive unit 61 rotates or slides relative to the side rod 1332, the push rod winding part 51 is driven to slide and adjust its position relative to the side rod 1332 through the cooperation between the drive unit 61 and the push rod winding part 51.

[0081] The drive member 61 is rotatably mounted on the side rod 1332. By rotating the drive member 61 relative to the side rod 1332, the push rod moves around the mounting part 51 relative to the side rod 1332.

[0082] Specifically, such as Figure 16 , Figure 17 , Figure 18 and Figure 20 As shown, the driving component 61 can be a screw, which is rotatably mounted on the side rod 1332 around its own axis. A nut 62 is fixedly mounted inside the push rod winding part 51, and the screw and the nut 62 are connected by a threaded connection. When the screw is operated to rotate around its own axis, the nut 62 is driven to move along the axis of the screw, thereby driving the push rod winding part 51 to move in the same direction to adjust its position.

[0083] In other embodiments, the drive member 61 may also be slidably mounted on the trolley frame, and the drive member 61 and the push rod winding part 51 are engaged by an inclined surface.

[0084] like Figure 21 , Figure 18 and Figure 19 As shown, the stroller may also include a handle 7, which is detachably mounted on the fabric cover 41.

[0085] By installing armrests 7 on the fabric cover 41, children can be prevented from sliding out of the seating space when they are sitting in it, thus providing safety protection for children through the armrests 7.

[0086] In addition, the armrest 7 is detachably connected with the cover 41, and when the armrest 7 is not needed, the armrest 7 can be detached from the cover 41, so that the appearance of the stroller is simple and beautiful, and the problem that the connection of the armrest 7 with the cover 41 affects the use of the stroller can be avoided.

[0087] The armrest 7 is made of hard material, which can prevent the child from sliding out of the seat and protect the child, and can also make the child sleep when the child is tired and sleepy, so that the comfort is improved, and the overall appearance of the stroller is better. The armrest 7 is preferably a hard plastic part.

[0088] The cover 41 is provided with a mounting portion 8, and the armrest 7 is detachably arranged on the mounting portion 8. Specifically, as shown in Figure 22 、 Figure 22 and Figure 20 , the mounting portion 8 is provided with a plug-in groove 81, and the armrest 7 has a plug-in portion 71, which cooperates with the plug-in groove 81, and the plug-in portion 71 can be inserted into or detached from the plug-in groove 81.

[0089] As shown in Figure 21 , the opposite sides of the end of the plug-in portion 71 are provided with chamfered portions 711, so that the plug-in portion 71 is easily inserted into the plug-in groove 81.

[0090] The cover 41 has a pair of side surfaces 411 arranged on the left and right sides of the seating space respectively, and the mounting portion 8 is arranged on each side surface 411. The armrest 7 has a U-shaped structure with an opening facing backward, and the plug-in portion 71 is arranged at each end of the armrest 7. When the armrest 7 is mounted on the cover 41, each plug-in portion 71 is inserted into the plug-in groove 81 on the corresponding side, as shown in Figure 18 and Figure 20 .

[0091] As shown in Figure 21 、 Figure 18 and Figure 20 , each side surface 411 of the cover 41 has a bottom edge 411a and a top portion 411b. The bottom edge 411a of the cover 41 is arranged at the position of the seat frame 2, and the top portion 411b of the side surface 411 is arranged at the position of the side rod 1332 of the push handle 133.

[0092] The length of the bottom edge 411a of the side surface 411 extending in the front-rear direction is approximately equal to the length of the seat frame 2 extending in the front-rear direction, and the approximately equal herein means that the two are exactly the same, or the length of the bottom edge 411a extending in the front-rear direction is slightly smaller than the length of the seat frame 2 extending in the front-rear direction.

[0093] The side surface 411 on each side gradually decreases in length from the bottom edge 411a to the top edge 411b in the front-rear direction. The mounting portion 8 is arranged at a position close to the bottom edge 411a of the side surface 411, and the mounting portion 8 extends in a direction that is obliquely intersected with the bottom edge 411a, and one end of the mounting portion 8 extends towards a direction close to the rear end of the seat frame 2. In this way, the length of the mounting portion 8 can be increased, and the fitting length between the insertion portion 71 and the insertion slot 81 can be increased, so that the stability of the armrest 7 when mounted on the cover 41 is better, and the child can be better supported and protected.

[0094] As shown in Figure 21 , Figure 2 and Figure 4 , the side surface 411 on each side also has an oblique edge 411c extending from the side rod 1332 to the front end of the seat frame 2, and at least the oblique edge 411c is arranged on the pull rope 42. The other end of the mounting portion 8 extends to the position of the oblique edge 411c and is arranged on the pull rope 42, so that the rigidity and stability of the armrest 7 after being mounted on the mounting portion 8 are better.

[0095] In a specific embodiment, the mounting portion 8 is a hard material piece fixedly arranged on the side surface 411 on each side. The mounting portion 8 in the form of a hard material piece makes the rigidity and stability of the armrest 7 and the mounting portion 8 better. The mounting portion 8 is preferably a hard plastic piece.

[0096] Preferably, the mounting portion 8 is arranged on the side of the side surface 411 facing the seating space, so that the appearance of the child stroller is neat and beautiful.

[0097] In another embodiment, the mounting portion 8 can also be made of the same material as the cover 41. At this time, the mounting portion 8 can be integrally made with the cover 41, or the mounting portion 8 can also be sewn on the side of the cover 41 facing the seating space. The mounting portion 8 made of the same material as the cover 41 has a simple manufacturing process and low cost.

[0098] The child stroller also includes a locking structure for locking the relative positions between the armrest 7 and the mounting portion 8 when the armrest 7 is mounted on the mounting portion 8, and the locking structure is arranged between the mounting portion 8 and the insertion portion 71 on each side. When the locking structures on both sides are unlocked, the armrest 7 can be removed from the mounting portion 8.

[0099] Preferably, the locking structure is arranged at the position of the oblique edge 411c of the side surface 411 of the mounting portion 8 close to the cover 41, so that the locking structure is convenient to operate to be locked or unlocked.

[0100] The locking structure can adopt the structure forms of large white buckles, buckles and the like that cooperate with each other.

[0101] The push rod assembly 13 also includes a locking member 9, which is used to lock the relative positions of the upper push rod 131 and the lower push rod 132. In this embodiment, the locking member 9 is rotatably disposed on the lower push rod 132. When the locking member 9 is in the locked state, it abuts against the upper push rod 131, thereby offsetting the radial clearance between the upper push rod 131 and the lower push rod 132 and preventing wobbling between them. Figure 25 and Figure 26 As shown.

[0102] The push rod assembly 13 can also lock the axial position between the upper push rod 131 and the lower push rod 132 via an additional locking element, preventing them from sliding relative to each other. Only after the locking element 9 is unlocked can the additional locking element be unlocked, allowing the upper push rod 131 and the lower push rod 132 to slide relative to each other. This improves the safety performance of the stroller and prevents accidental unlocking of the lock between the upper push rod 131 and the lower push rod 132, thus preventing relative sliding between them.

[0103] When the stroller is folded, the locking element 9 engages with the front support 11, thereby locking the positions of the front support 11 and the lower push rod 132, ensuring the stroller remains stably folded and does not unfold automatically. Figure 1 and Figure 2 As shown.

[0104] Specifically, the front bracket 11 is provided with a protrusion 113a, and the locking member 9 is provided with a recess 91 that mates with the protrusion 113a, such as... Figures 5-7 , Figure 25 , Figure 26 As shown. When the stroller is in the folded state, the locking element 9 is locked, at which point the protrusion 113a engages with the recess 91, thereby locking the positions of the front support 11 and the lower push rod 132, as shown. Figure 5 and Figures 1-5 As shown. When the locking member 9 rotates relative to the lower push rod 132 to unlock the locking member 9, the protrusion 113a can disengage from the recess 91. When the locking member 9 rotates relative to the lower push rod 132 to lock the locking member 9, the protrusion 113a can engage with the recess 91.

[0105] The stroller also includes a first locking mechanism, which locks the relative positions of the front support 11 and the lower push rod 132 when the stroller frame is in the unfolded state. When the stroller is folded, the upper push rod 131 slides relative to the lower push rod 132, which unlocks the first locking mechanism. This makes unlocking the first locking mechanism convenient, requiring no separate operation, and facilitates the folding of the stroller. The specific structure of the first locking mechanism and the structure that unlocks it can both adopt structures from the prior art.

[0106] The child stroller further comprises a second locking mechanism for locking the relative positions of the front support 11 and the rear support 12 when the stroller frame is in the unfolded state, thereby locking the positions of the four-bar linkage formed between the front support 11, the seat frame 2, the connecting rod 14 and the rear support 12. The second locking mechanism can be unlocked when the lower push rod 132 slides relative to the front support 11 when the child stroller is folded. This makes the unlocking operation of the second locking mechanism convenient and does not need to be operated separately, facilitating the folding of the child stroller. The specific structure of the second locking mechanism and the structure for unlocking the second locking mechanism can adopt the structures in the prior art.

[0107] As shown in Figure 23 The stroller frame further comprises a rear cross rod 15 connected between the lower portions of the left and right rear supports 12, and the front wheel assembly 31 is located between the left and right rear wheel assemblies 32 and in front of the rear cross rod 15. Preferably, the front wheel assembly 31 is rotatably arranged on the front support 11 about a rotation shaft extending in the up-down direction, so that when the child stroller is folded, the front wheel assembly 31 can rotate relative to the front support 11, so that the plane in which the front wheel assembly 31 is located is approximately parallel to the central axis of the rear cross rod 15, thereby enabling the front wheel assembly 31 to be closer to the rear cross rod 15, and enabling the front support 11 to be closer to the rear support 12, thereby reducing the structural volume of the child stroller after folding.

[0108] When the child stroller is in the unfolded state, as shown in Figure 24As shown, each locking member, the first locking mechanism and the second locking mechanism on the push rod assembly 13 are in the locked state. The upper push rod 131 extends out of the lumen of the lower push rod 132 from the upper end of the lumen of the lower push rod 132, the lower push rod 132 extends out of the lumen of the front support rod 111 from the upper end of the lumen of the front support rod 111, the lower part of the lower push rod 132 is located in the lumen of the front support rod 111 and does not extend out of the lumen. The pull rope 42 is in a taut state to flatten the cover 41. The upper push rod 131, the lower push rod 132 and the front support rod 111 are all arc-shaped, which arches away from the seat frame 2, and the radius of curvature of the arc is 0.3-5m. Preferably, the radius of curvature is 0.4-1m. In this way, compared with the straight rod-shaped upper push rod 131, lower push rod 132 and front support rod 111, the inclination of the pull rope 42 can be reduced, thereby improving the comfort of the seat assembly when riding. Moreover, when the included angle between the front support 11 and the rear support 12 is large, in this embodiment, the included angle between the front support 11 and the rear support 12 is greater than 90 degrees, compared with the straight rod-shaped upper push rod 131, lower push rod 132 and front support rod 111, the angle of its backward inclination can be reduced, thereby avoiding the problem that the center of gravity of the stroller moves backward and the stroller overturns. In addition, the length of the push rod assembly 13 can also be reduced to reduce the structural volume of the stroller, while also making the stroller appearance beautiful. The center of the seat frame 2 is 0.25-0.55m above the ground, preferably 0.3-0.45m above the ground. The higher the center of the seat frame 2 is above the ground, the greater the radius of curvature of the arc of the corresponding upper push rod 131, lower push rod 132 and front support rod 111.

[0109] When the stroller is folded, after the lock between the upper push rod 131 and the lower push rod 132 is completely unlocked, the upper push rod 131 is slid downward until it is mostly retracted into the lumen of the lower push rod 132, and the first locking mechanism is unlocked; the entire push rod assembly 13 is slid downward until the upper part of the telescopic rod body is mostly retracted into the lumen of the front support rod 111, and the second locking mechanism is unlocked. The front wheel assembly 31 is rotated relative to the front support 11 about the rotation shaft extending in the up-down direction, the rear support 12 is rotated forward to gradually approach the front support 11, and the seat frame 2 is pulled downward by the connecting rod 14 to gradually approach the front support 11. During this process, the pull rope 42 gradually relaxes. As shown in Figure 25 and Figure 26 .

[0110] When the stroller is in the folded state, the plane where the front wheel assembly 31 is located is approximately parallel to the central axis of the rear crossbar 15, so that the rods constituting the stroller frame are closely close together, the lower part of the lower push rod 132 extends to the outside of the lumen of the front support rod 111, so that the lower part of the lower push rod 132, the front wheel assembly 31 and / or the rear wheel assembly 32 can be collectively supported on the ground, so that the folded stroller can stand on the ground, facilitating the carrying and storage of the stroller. In this embodiment, when the stroller is in the folded state, the lowermost end of the front wheel assembly 31 is located above the lowermost end of the rear wheel assembly 32, the lower part of the lower push rod 132 and the left and right rear wheel assemblies 32 are collectively supported on the ground, and the left and right rear wheel assemblies 32 and the lower part of the lower push rod 132 are sequentially connected to form a triangular structure, so that the stability of the folded stroller is good, and the stroller can stand on the ground without being easily tilted. As shown in Figures 4-9 and Figure 7 .

[0111] When the stroller is unfolded from the folded state, the push rod assembly 13 is slid upward relative to the front support rod 111 until most of it extends from the lumen of the front support rod 111, and the upper push rod 131 is slid upward relative to the lower push rod 132 until most of it extends from the lumen of the lower push rod 132. During this process, the pull rope 42 is gradually stretched. When the push rod assembly 13 is in the unfolded position, the pull rope 42 is in a pre-tightened state. During the process of stretching the pull rope 42 to the pre-tightened state, the seat frame 2 can be rotated, thereby linking the relative rotation between the rear support 12 and the front support 11, and when the push rod assembly 13 is in the unfolded position, the first included angle between the front support 11 and the rear support 12 is formed, as shown in ​ . Then the push rod assembly 13 is pressed downward, and the rear support 12 and the front support 11 continue to rotate and unfold relative to each other, and the seat frame 2 is gradually turned upward away from the front support 11 by the connecting rod 14. During this process, the pull rope 42 moves relative to the push rod assembly 13, the seat frame 2 and the rear support 12 with the rotation of the rear support 12, and the stroke still changes, so that the elasticity of the pull rope 42 does not affect the unfolding operation of the stroller, and the rear support 12 and the front support 11 can continue to rotate relative to each other until they move to the unfolded position, and the seat frame 2 can continue to rotate upward until it moves to the unfolded position. When the front support 11, the rear support 12 and the seat frame 2 all move to the unfolded position, at this time, the second included angle between the front support 11 and the rear support 12 is formed, and the second included angle is greater than the first included angle.

[0112] The front support 11 is provided with a limiting portion 114, when the stroller is unfolded from the folded state, and the rear support 12 rotates away from the front support 11, the limiting portion 114 limits the rotation of the rear support 12, thereby limiting the rear support 12 at the position where the stroller is unfolded.

[0113] As shown in ​The limiting portions 114 are respectively arranged at left and right sides of the first connecting member 112, and respectively protrude outward from left or right side surfaces of the first connecting member 112. The limiting portions 114 are located on a rotation path of the rear support 112 rotating away from the front support 11. When the stroller frame is in the unfolded state, the limiting portions 114 abut against the rear support 12 to block the rotation of the rear support 12, so that the rear support 12 cannot continue to rotate away from the front support 11, and the stroller frame is in the unfolded state.

[0114] The first shaft 16 and the limiting portions 114 are respectively located at opposite ends of the first connecting member 112, and the first shaft 16 is close to the upper end of the first connecting member 112, and the limiting portions 114 are close to the lower end of the first connecting member 112. In this way, the distance between the first shaft 16 and the limiting portions 114 is relatively large, which can improve the connection strength between the front support 11 and the rear support 12 when the stroller is in the unfolded state.

[0115] Preferably, the first shaft 16 and the limiting portions 114 are respectively located at upper and lower sides of the front support rod 111 when the stroller is in the unfolded state.

[0116] The limiting portions 114 are integrally formed with the first connecting member 112.

[0117] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A stroller, characterized by: The stroller frame comprises a front support, a rear support and a push rod assembly, the upper part of the front support is rotationally connected with the upper part of the rear support, the lower part of the push rod assembly is slidingly connected with the upper part of the front support, the stroller further comprises a seat assembly arranged on the stroller frame, the seat assembly comprises a seat frame, a pull rope and a cloth cover, in the unfolded state, the pull rope is supported between the seat frame and the push rod assembly, the cloth cover is arranged between the pull rope and the seat frame, and the cloth cover and the seat frame form a load bearing space which is open forwardly; the front support and the push rod assembly are arc-shaped as a whole and arch upwardly away from the seat frame, and the curvature radius of the arc is 0.3-5m.

2. The stroller of claim 1, wherein: The seat frame is movably arranged on the front support, and the seat assembly further comprises a linkage mechanism arranged between the seat frame and the rear support, and the linkage mechanism is movably connected with the rear support and the seat frame respectively. When the rear support is folded toward the front support, the rear support drives the seat frame to fold toward the front support through the linkage mechanism. When the rear support is rotated toward the unfolded position, the rear support drives the seat frame to move toward the unfolded position through the linkage mechanism.

3. The stroller of claim 2, wherein: When the stroller is in the unfolded state, the height of the center of the seat frame from the ground is 0.25-0.55m.

4. The stroller of claim 3, wherein: The greater the height of the center of the seat frame from the ground, the greater the curvature radius of the arc.

5. The stroller of claim 3, wherein: When the stroller is in the unfolded state, the height of the center of the seat frame from the ground is 0.3-0.45m.

6. The stroller of claim 2, wherein: The linkage mechanism comprises a connecting rod, one end of the connecting rod is rotationally connected with the front part of the seat frame, and the other end of the connecting rod is rotationally connected with the upper part of the rear support. The rear support is rotationally connected with the front support about a first shaft, and part of the rear support extends upwardly to the other side of the first shaft to form an extension part, and the connecting rod is rotationally arranged on the extension part.

7. The stroller of claim 1, wherein: The front support has a lumen which is adapted to the push rod assembly, and part of the push rod assembly is accommodated in the lumen in the folded state. The push rod assembly comprises a push handle and a telescopic rod body, the push handle extends along the left-right direction as a whole, and one end of the telescopic rod body is fixedly arranged at the middle position of the push handle.

8. The stroller of claim 1, wherein: The first end of the pull rope is fixedly arranged on the seat frame, and the second end of the pull rope is arranged around the upper part of the push rod assembly and then is arranged in cooperation with the rear support, so that the pull rope is moved and tensioned when the rear support is moved toward the unfolded position. The upper part of the rear support is provided with a support winding part which is slidable relative to the pull rope, and the second end of the pull rope is fixedly arranged on the seat frame after being arranged around the support winding part. Alternatively, the second end of the pull rope is fixedly arranged on the upper part of the rear support.

9. The stroller of claim 1, wherein: The curvature radius of the arc is 0.4-1m.

10. The stroller of claim 1, wherein: When the stroller is in the unfolded state, the included angle between the front support and the rear support is greater than 90 degrees.

11. The stroller of claim 1, wherein: The front support comprises a front support rod and a first connecting piece fixedly arranged at an upper portion of the front support rod, and the rear supports are arranged at left and right sides respectively, and upper portions of the rear supports at each side are rotationally connected with corresponding side portions of the first connecting piece respectively; the push rod assembly comprises an upper push rod and a lower push rod, a lower portion of the upper push rod is slidingly connected with an upper portion of the lower push rod, and a lower portion of the lower push rod is slidingly connected with an upper portion of the front support rod, and the front support rod, the lower push rod and the upper push rod all present an arc shape arched in a direction away from the seat frame.

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