Stroller

Abstract

The present application discloses a kind of baby carriage, it can be converted between unfolded state and folding state, baby carriage includes car handle, front leg, rear leg, linkage, car handle lower side is pivotally connected with the different position of rear leg in rear side of front leg, linkage can be relatively linearly mobile with rear leg connection;Car handle lower side is also relatively mobile with the side of linkage pivotally connected, and the side of linkage is pivotally connected with rear leg in different position of car handle lower side;Rear side of front leg is also relatively mobile with the other side of linkage pivotally connected, and the other side of linkage is pivotally connected with rear leg in different position of rear side of front leg;Car handle upper side rotates towards the direction of rear leg, can pull linkage relatively linearly mobile with rear leg, to drive the front side of front leg also rotates towards the direction of rear leg, until car handle, front leg, rear leg mutually close, baby carriage is folded, thus, the folding operation of the present application baby carriage is convenient, and after folding, small volume.

Description

Technical Field

[0001] This invention relates to the field of infant and toddler products, and more particularly to a stroller. Background Technology

[0002] Strollers are widely used by parents when taking their children out. Strollers are generally designed to switch between an unfolded and folded state. When needed, the stroller can be unfolded for the child to sit or lie down, and the parents can push the stroller to move it, thus replacing the traditional way of parents carrying the child. When taking the stroller out, carrying it up or down stairs, or leaving it at home, the stroller can be folded up. Because a folded stroller takes up less space than an unfolded stroller, it is more convenient to carry and move, and it takes up less space when carried out or placed indoors.

[0003] For many parents, the performance requirements for a stroller are that it should be easy to fold; another requirement is that it should be as small as possible after folding, because the smaller the size, the easier it is to carry when going out (sometimes it needs to be placed in the car, and if the stroller is still relatively large after folding, it will take up too much space), easy to move, and it should take up as little space as possible when stored at home. Summary of the Invention

[0004] The purpose of this invention is to provide a stroller that is easy to fold and has a small size when folded.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A stroller that can switch between an unfolded state and a folded state includes a handlebar, a front leg, a rear leg, and a linkage. The lower side of the handlebar is pivotally connected to the rear side of the front leg at different positions. The linkage is movably connected to the rear leg. The lower side of the handlebar can also be pivotally connected to one side of the linkage, and one side of the linkage is pivotally connected to the rear leg at different positions on the lower side of the handlebar. The rear side of the front leg can also be pivotally connected to the other side of the linkage, and the other side of the linkage is pivotally connected to the rear leg at different positions on the rear side of the front leg. When the upper side of the handlebar rotates towards the rear leg, it can pull the linkage to move linearly relative to the rear leg, thereby driving the front side of the front leg to rotate towards the rear leg as well.

[0007] The linkage can move vertically relative to the rear foot, the lower side of the stroller can be pivotally connected to the upper side of the linkage, and the rear side of the front foot can be pivotally connected to the lower side of the linkage. When the stroller is in the unfolded state, the pivot position between the lower side of the stroller and the rear foot is located above the pivot position between the rear side of the front foot and the rear foot.

[0008] When the stroller is in the unfolded state, the pivot point between the lower side of the rider and the rear foot is located on the upper side of the first drive member.

[0009] When the stroller is in the unfolded state, the first drive member is located behind the first elongated hole.

[0010] A first driving member is provided on the lower side of the rider. The first driving member is pivotally connected to the upper side of the linkage member and can be moved relative to it. The pivot position between the lower side of the rider and the rear foot is spaced apart from the first driving member. Preferably, when the stroller is in the unfolded state, the pivot position between the rear side of the front foot and the rear foot is located in front of the second driving member.

[0011] The linkage component has a first elongated hole extending forward and backward on its upper side. The first driving component extends into the first elongated hole and can move along the first elongated hole and rotate relative to the first elongated hole. The second driving component is located behind the second elongated hole.

[0012] A second driving member is provided on the rear side of the front foot. The second driving member is pivotally connected to the lower side of the linkage member in a relatively movable manner. The pivot position between the rear side of the front foot and the rear foot is spaced apart from the second driving member. Preferably, the pivot position between the rear side of the front foot and the rear foot is located on the front side of the second driving member.

[0013] The linkage component has a second elongated hole extending forward and backward on its lower side. The second driving component extends into the second elongated hole and can move along the second elongated hole and rotate relative to it. Preferably, when the stroller is in the unfolded state, the second driving component is located behind the second elongated hole.

[0014] The stroller also includes a connecting seat, and the linkage is linearly movable vertically to the connecting seat; the front side of the rear foot is fixedly connected to the connecting seat, and the lower side of the stroller and the rear side of the front foot are both pivotally connected to the connecting seat, with the pivot position of the lower side of the stroller and the connecting seat located above the pivot position of the rear side of the front foot and the connecting seat.

[0015] The connecting seat includes a first connecting member and a second connecting member that are fixedly connected to each other, and the linkage member is connected between the first connecting member and the second connecting member that can move linearly up and down relative to each other.

[0016] A vertically extending receiving groove is provided between the first connector and the second connector, and the linkage can be linearly moved vertically within the receiving groove; preferably, the first connector has a vertically extending first receiving groove on the side facing the second connector, and the second connector has a vertically extending second receiving groove on the side facing the first connector, and the first receiving groove and the second receiving groove together form the receiving groove.

[0017] A portion of the upper side of the second connector protrudes beyond the upper end of the first connector, and the lower side of the stroller is pivotally connected to this portion of the second connector; when the stroller is in the unfolded state, the upper side of the linkage protrudes beyond the first connector; preferably, the upper end face of the first connector is set as a concave arc surface, and correspondingly, the lower side of the stroller is set as an arc shape, so that when the stroller is in the unfolded state, the outer periphery of the lower side of the stroller matches the shape of the upper end face of the first connector.

[0018] A portion of the lower front side of the first connector protrudes beyond the front side of the second connector, and the rear side of the front foot is pivotally connected to this portion of the first connector; when the stroller is in the unfolded state, the lower side of the linkage protrudes beyond the second connector; preferably, the lower front end face of the second connector is set as a concave arc-shaped surface, and correspondingly, the rear side of the front foot is also set as an arc shape, so that when the stroller is in the unfolded state, the rear side of the front foot matches the arc-shaped surface of the second connector.

[0019] The stroller of the present invention, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0020] 1. When folding, simply rotate the upper part of the stroller towards the rear foot, and the linear movement of the linkage will drive the front foot to rotate and move backward towards the rear foot until the stroller is folded. Thus, the stroller folding operation of this invention is convenient.

[0021] 2. When the stroller is folded, the hand, front feet, and back feet are close together, making the overall size of the stroller small and easy to carry and transport. It is suitable for carrying out or storing indoors.

[0022] 3. The linkage only moves back and forth in a straight line relative to the rear leg / connecting seat. Therefore, when the stroller is folded, the space required for the relative movement and rotation of the underside of the stroller, the linkage, and the rear side of the front leg is relatively small. As a result, this part of the stroller can be made relatively flat, and this part is also relatively flat after the stroller is folded. This makes the stroller lighter when unfolded and smaller when folded.

[0023] 4. The connection method of the handrail, front legs, back legs, linkage parts and connecting seat makes the overall structure of this part of the stroller more compact and flatter in the left and right directions. This makes the stroller lighter when unfolded and smaller when folded. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the stroller of the present invention in its unfolded state;

[0025] Figure 2 This is a plan view of the stroller of the present invention in its unfolded state;

[0026] Figure 3 According to Figure 1 Enlarged diagram of the explosion in section A Figure 1 ;

[0027] Figure 4 According to Figure 1 Enlarged diagram of the explosion in section A Figure 2 ;

[0028] Figure 5 This is an enlarged schematic diagram of the connection between the linkage and the rear leg of the stroller in the unfolded state of the present invention.

[0029] Figure 6 According to Figure 5 A diagram from another angle;

[0030] Figure 7 This is a three-dimensional schematic diagram of the stroller of the present invention in the process of being folded up;

[0031] Figure 8 This is a plan view of the stroller of the present invention in the process of being folded up;

[0032] Figure 9 This is a three-dimensional schematic diagram of the stroller of the present invention in its folded state;

[0033] Figure 10 This is a plan view of the stroller of the present invention in its folded state. Detailed Implementation

[0034] like Figures 1 to 10 As shown, this invention discloses a stroller that can switch between an unfolded state and a folded state. The stroller includes a handlebar 1, front legs 2, rear legs 3, and a linkage 4. The lower side of the handlebar 1 is pivotally connected to the rear side of the front legs 2 at different positions on the rear legs 3. The linkage 4 is movably connected to the rear legs 3. The lower side of the handlebar 1 can also be pivotally connected to one side of the linkage 4, meaning that the lower side of the handlebar 1 is pivotally connected to one side of the linkage 4, and the lower side of the handlebar 1 can also move relative to the linkage 4. The other side of component 4 is pivotally connected to the rear foot 3 at different positions on the underside of the rider 1; the rear side of the front foot 2 can also be pivotally connected to the other side of the linkage component 4 relatively movable, that is, the rear side of the front foot 2 is rotatably connected to the lower side of the linkage component 4, and the rear side of the front foot 2 can also move relative to the linkage component 4, and the lower side of the linkage component 4 is pivotally connected to the rear foot 3 at different positions on the rear side of the front foot 2; when the upper side of the rider 1 rotates towards the rear foot 3, it can pull the linkage component 4 to move linearly relative to the rear foot 3, thereby driving the front side of the front foot 2 to also rotate towards the rear foot 3.

[0035] In this embodiment, the linkage 4 can move vertically relative to the rear foot 3, the lower side of the stroller 1 can be pivotally connected to the upper side of the linkage 4, and the rear side of the front foot 2 can be pivotally connected to the lower side of the linkage 4. When the stroller is in the unfolded state, the pivot position between the lower side of the stroller 1 and the rear foot 3 is located above the pivot position between the rear side of the front foot 2 and the rear foot 3.

[0036] The rider 1 is pivotally connected to the rear foot 3 on its lower side around the first pivot 10. A first drive member 11 is provided on the side of the rider 1 facing the rear foot 3. The first drive member 11 is pivotally connected to the upper side of the linkage member 4. The first drive member 11 is spaced apart from the first pivot 10, that is, the pivot position of the lower side of the rider 1 and the rear foot 3 is spaced apart from the first pivot 10, thereby achieving the purpose of pivoting the upper side of the linkage member 4 and the rear foot 3 at different positions on the lower side of the rider 1.

[0037] In this embodiment, the upper side of the linkage 4 is provided with a first elongated hole 41 extending back and forth. The first driving member 11 extends into the first elongated hole 41, and the first driving member 11 can move along the first elongated hole 41 and rotate relative to the first elongated hole 41, thereby achieving the purpose that the lower side of the rider 1 can also be pivotally connected to the upper side of the linkage 4 in a relatively movable manner.

[0038] The rear side of the front foot 2 can be pivotally connected to the rear foot 3 around the second pivot 20. A second driving member 21 is provided on the side of the rear side of the front foot 2 facing the rear foot 3. The second driving member 21 can be pivotally connected to the lower side of the linkage member 4. The second driving member 21 and the second pivot 20 are spaced apart, that is, the pivot position of the rear side of the front foot 2 and the rear foot 3 is spaced apart from the second driving member 21, thereby achieving the purpose of pivoting the upper side of the linkage member 4 and the rear foot 3 to different positions on the lower side of the rider 1.

[0039] The lower side of the linkage 4 is provided with a second elongated hole 42 extending forward and backward. The second driving member 21 extends into the second elongated hole 42 and can move along the second elongated hole 42 and rotate relative to the second elongated hole 42, thereby achieving the purpose that the rear side of the front foot 2 can also be pivotally connected to the lower side of the linkage 4.

[0040] In this embodiment, when the stroller is in the unfolded state, the first drive member 11 is located below the first pivot 10, that is, the pivot position between the lower side of the stroller 1 and the rear foot 3 is located above the first drive member 11, and the pivot position between the lower side of the stroller 1 and the rear foot 3 can be located at the upper rear side, the upper front side, or the upper rear side of the first drive member 11.

[0041] Preferably, when the stroller is in the unfolded state, the first drive member 11 is located behind the first elongated hole 41.

[0042] In this embodiment, when the stroller is in the unfolded state, the second drive member 21 is located on the rear side of the second pivot 20, that is, the pivot position between the rear side of the front leg 2 and the rear leg 3 is located on the front side of the second drive member 21. Preferably, the second drive member 21 is located on the rear side of the second elongated hole 42.

[0043] In this embodiment, the stroller further includes a connecting seat 5, and the linkage 4 is linearly movable vertically to the connecting seat 5. The front side of the rear foot 3 is fixedly connected to the connecting seat 5, and the lower side of the stroller arm 1 and the rear side of the front foot 2 are both pivotally connected to the connecting seat 5, with the pivot position of the lower side of the stroller arm 1 and the connecting seat 5 located above the pivot position of the rear side of the front foot 2 and the connecting seat 5. This achieves the purpose of the pivot position of the lower side of the stroller arm 1 and the rear foot 3 being located above the pivot position of the rear side of the front foot 2 and the rear foot 3.

[0044] Preferably, the lower side of the stroller 1 is pivotally connected to the upper side of the connecting seat 5, the rear side of the front foot 2 is pivotally connected to the lower front side of the connecting seat 5, and the rear foot 3 is fixedly connected to the lower rear side of the connecting seat 5, so that the structure of the entire stroller is more compact.

[0045] The connecting base 5 includes a first connecting member 51 and a second connecting member 52 that are fixedly connected to each other. The linkage member 4 is linearly movable vertically between the first connecting member 51 and the second connecting member 52. Preferably, a vertically extending receiving groove is provided between the first connecting member 51 and the second connecting member 52. The linkage member 4 is linearly movable vertically within the receiving groove, thereby playing a guiding role and ensuring that the linkage member 4 does not shift during vertical reciprocating movement, thus ensuring the accuracy of the stroller folding and unfolding operation.

[0046] Preferably, the first connector 51 is provided with a vertically extending first receiving groove 11 on the side facing the second connector 52 (e.g., Figure 3 , 6 As shown), the second connector 52 has a vertically extending second receiving groove 521 on the side facing the first connector 51 (as shown). Figure 4 , 5 As shown), the first receiving groove 11 and the second receiving groove 521 together form the receiving groove.

[0047] In this embodiment, a portion of the upper side of the second connector 52 protrudes beyond the upper end of the first connector 51, and the lower side of the stroller 1 is pivotally connected to this portion of the second connector 52. When the stroller is in the unfolded state, the upper side of the linkage 4 protrudes beyond the first connector 51, that is, the first elongated hole 41 protrudes beyond the upper end of the first connector 51, thereby facilitating the connection between the second connector 52 and the second elongated hole 42. Correspondingly, the upper side of the second receiving groove 521 protrudes beyond the first connector 51.

[0048] Preferably, the upper end face of the first connector 51 is configured as a concave arc-shaped surface 512 (e.g., Figure 5 As shown), correspondingly, the lower side of the stroller 1 is set in an arc shape. When the stroller is in the unfolded state, the outer perimeter of the lower side of the stroller 1 matches the shape of the upper surface of the first connecting member 51 (as shown). Figure 1 As shown in the figure, this design makes the stroller look more integrated and the structure more compact. Moreover, when the rider 1 rotates backward and downward, there will be no interference between the two, and there will be no hand-clamping gap between the curved surface 512 and the outer surface of the rider 1, making the folding operation safer.

[0049] A portion of the lower front side of the first connector 51 protrudes beyond the front side of the second connector 52, and the rear side of the front leg 2 is pivotally connected to this portion of the first connector 51. When the stroller is in the unfolded state, the lower side of the linkage 4 protrudes beyond the second connector 52, that is, the lower side of the second elongated hole 42 protrudes beyond the second connector 52, thereby facilitating the connection between the second elongated hole 42 and the second connector 52 on the rear side of the front leg 2. Correspondingly, the lower side of the second receiving groove 521 protrudes beyond the second connector 52.

[0050] In this embodiment, the lower front end face of the second connector 52 is configured as a recessed arc-shaped surface 522 (e.g., Figure 3 As shown in the diagram, the rear side 22 of the front leg 2 is also designed to be arc-shaped. When the stroller is in the unfolded state, the shape of the rear side 22 of the front leg 2 matches the arc-shaped surface 522 of the second connecting member 52. Similarly, this design makes the stroller look more integrated and compact. Moreover, when the rear leg 3 rotates, there will be no interference between the rear side 22 of the front leg 2 and the arc-shaped surface 522 of the second connecting member 52, and there will be no gap between the two surfaces that could pinch the hand.

[0051] The front foot 2 is connected to the front wheel 6 at its lower front part, and the rear foot 3 is connected to the rear wheel 7 at its lower rear part.

[0052] The stroller includes two side supports 100, each side support 100 including the handle 1, front legs 2, rear legs 3, linkage 4, and connecting seat 5. A crossbar connects the two side supports 100 to maintain the stability of the stroller in its unfolded state. In this embodiment, a first crossbar connects the two connecting seats 5, a second crossbar connects the two front legs 2, and a third crossbar connects the two rear legs 3.

[0053] When folding the stroller of this invention, the upper side of the stroller 1 rotates downwards and backwards towards the rear foot 3, causing the lower side of the stroller 1 to rotate upwards. Because the linkage 4 can only move linearly up and down relative to the connecting seat 5, the first connecting member 51 moves forward along the first elongated hole 41 and rotates relative to the first elongated hole 41, thus pulling the linkage 4 upwards linearly. When the linkage 4 moves upwards linearly, it pulls the second connecting member 52 on the front foot 2 upwards, that is, pulls the rear side of the front foot 2 to rotate upwards. Thus, the second connecting member 52 moves along the second elongated hole 42 and rotates relative to it, and the front side of the front foot 2 also rotates backwards, that is, rotates backwards towards the rear foot 3 (as shown). Figure 7 , 8 As shown), until the stroller 1 and front foot 2 can no longer rotate relative to the rear foot 3, at which point the stroller folds; that is, simply rotating the upper side of the stroller 1 towards the rear foot downwards will cause the linkage 4 to move linearly, driving the front foot 2 to also rotate towards the rear foot 3, thereby folding the stroller of the present invention. Thus, the folding operation of the present invention is very convenient; moreover, after the stroller is folded, the stroller 1, front foot 2 and rear foot 3 are relatively close to each other (as shown). Figure 9 , 10 As shown, strollers are relatively small, making them easy to store, carry, and move.

[0054] When you want to unfold the folded stroller, rotate the handle 1 upwards. The components will then rotate and move in the opposite direction until the stroller unfolds again.

[0055] Because during the unfolding and folding of the stroller, the linkage 4 only moves back and forth in a straight line relative to the rear leg 3 / connecting seat 5, the space required for the relative movement and rotation of the underside of the stroller 1, the linkage, and the rear side of the front leg 2 is relatively small when the stroller is folded. Therefore, this part of the stroller can be made relatively flat, and this part is also relatively flat after the stroller is folded. This makes the stroller lighter when unfolded and smaller when folded.

[0056] Furthermore, the connection method between the lower side of the rider 1, the linkage 4, the rear side of the front leg 2, and the connecting seat 5 is equivalent to setting an empty space on the upper side of one side of the connecting seat 5 for the lower side of the rider 1 to pivot, and setting an empty space on the lower side of the other side of the connecting seat 5 for the rear side of the front leg 2 to pivot, while the linkage 4 is still connected inside the connecting seat 5. This makes the overall structure of this part of the stroller more compact, and the rider 1, linkage 4, connecting seat 5, and front leg 2 appear flatter in the left and right directions after they are connected. In this way, the stroller is lighter when unfolded and smaller when folded.

[0057] Furthermore, the first connecting member 51 is located on the lower front side of the first rotating shaft 10, that is, the first connecting member 51 is located on the lower front side of the position where the handlebar 1 is pivotally connected to the rear foot 3. Thus, rotating the handlebar 1 downwards and backwards allows for faster upward linear movement of the linkage 4, thereby enabling faster folding of the stroller of the present invention.

[0058] The stroller also includes a locking mechanism for locking it in the unfolded state. The locking mechanism can be located between any two of the following components: the handlebars 1, front legs 2, rear legs 3, linkage 4, and connecting seat 5. Unlocking the locking mechanism allows for folding. The locking mechanism and unlocking mechanism can be any known and feasible structure, and are not the inventive point of this invention; therefore, they will not be described in detail here.

[0059] In the above description of relative orientations, the location of the rider 1 is considered above, the location of the front wheel 6 and rear wheel 7 is considered below, the location of the front wheel 6 is considered in front, the location of the rear wheel 7 is considered behind, and the locations of the side supports 100 are considered left and right. Those skilled in the art should understand that the above definitions of orientation are only for the convenience of describing the embodiments of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention; furthermore, the relative orientations described above will change accordingly with changes in the viewing angle.

Claims

1. A stroller, convertible between an unfolded state and a folded state, characterized in that: The stroller comprises a handle, a front leg, a rear leg, a linkage, the lower side of the handle is pivotally connected to the rear side of the front leg at different positions of the rear leg, the linkage is linearly movably connected to the rear leg, the lower side of the handle is pivotally connected to the upper side of the linkage, the upper side of the linkage is pivotally connected to the rear leg at different positions of the lower side of the handle, the rear side of the front leg is pivotally connected to the lower side of the linkage, the lower side of the linkage is pivotally connected to the rear leg at different positions of the rear side of the front leg, when the stroller is in an unfolded state, the pivotally connected position of the lower side of the handle to the rear leg is above the pivotally connected position of the rear side of the front leg to the rear leg, when the upper side of the handle rotates towards the rear leg, the linkage is linearly moved relative to the rear leg, thereby driving the front side of the front leg to rotate towards the rear leg. The lower side of the handle is provided with a first driving member, the upper side of the linkage is provided with a first long hole extending in front and back directions, the first driving member extends into the first long hole and is linearly movable and rotatable relative to the first long hole. The rear side of the front leg is provided with a second driving member, the lower side of the linkage is provided with a second long hole extending in front and back directions, the second driving member extends into the second long hole and is linearly movable and rotatable relative to the second long hole. The front lower part of the front leg is connected with a front wheel, and the rear lower part of the rear leg is connected with a rear wheel.

2. The stroller of claim 1, wherein: The pivotally connected position of the lower side of the handle to the rear leg is spaced apart from the first driving member.

3. The stroller of claim 2, wherein: When the stroller is in the unfolded state, the pivotally connected position of the lower side of the handle to the rear leg is above the upper side of the first driving member.

4. The stroller of claim 3, wherein: When the stroller is in the unfolded state, the first driving member is located at the rear side of the first long hole.

5. The pram of claim 1 or 2 or 3 or 4, characterized by: The pivotally connected position of the rear side of the front leg to the rear leg is spaced apart from the second driving member, and when the stroller is in the unfolded state, the pivotally connected position of the rear side of the front leg to the rear leg is located at the front side of the second driving member.

6. The stroller of claim 5, wherein: When the stroller is in the unfolded state, the second driving member is located at the rear side of the second long hole.

7. The stroller according to any of claims 1 to 4, 6, characterized in that: The linkage is linearly movably connected to a connecting seat, the front side of the rear leg is fixedly connected to the connecting seat, the lower side of the handle and the rear side of the front leg are both pivotally connected to the connecting seat, and the pivotally connected position of the lower side of the handle to the connecting seat is above the pivotally connected position of the rear side of the front leg to the connecting seat.

8. The stroller of claim 7, wherein: The connecting seat comprises a first connecting member and a second connecting member which are fixedly connected relative to each other, and the linkage is linearly movably connected between the first connecting member and the second connecting member.

9. The stroller of claim 8, wherein: An accommodation groove extending in up and down directions is arranged between the first connecting member and the second connecting member, and the linkage is linearly movably located in the accommodation groove.

10. The stroller of claim 9, wherein: A first accommodation groove extending in up and down directions is arranged on the side of the first connecting member facing the second connecting member, a second accommodation groove extending in up and down directions is arranged on the side of the second connecting member facing the first connecting member, and the first accommodation groove and the second accommodation groove together form the accommodation groove.

11. The stroller of any one of claims 8 to 10, wherein: A part of the upper side of the second connecting member is exposed outside the upper end of the first connecting member, and the lower side of the handle is pivotally connected to the part of the second connecting member, and when the stroller is in the unfolded state, the upper side of the linkage is exposed outside the first connecting member.

12. The stroller of claim 11, wherein: The upper end surface of the first connecting piece is set as a downward concave arc surface, and correspondingly, the lower side of the handle is set as a circular arc, and the peripheral surface of the lower side of the handle matches the shape of the upper end surface of the first connecting piece when the baby carriage is in the unfolded state.

13. The stroller of claim 11, wherein: A part of the lower side of the front of the first connecting piece is exposed outside the front side of the second connecting piece, and the rear side of the front leg is pivoted to the part of the first connecting piece; the lower side of the linkage is exposed outside the second connecting piece when the baby carriage is in the unfolded state.

14. The stroller of claim 12, wherein: A part of the lower side of the front of the first connecting piece is exposed outside the front side of the second connecting piece, and the rear side of the front leg is pivoted to the part of the first connecting piece; the lower side of the linkage is exposed outside the second connecting piece when the baby carriage is in the unfolded state.

15. The pram of claim 13 or 14, characterized in that: The lower side end surface of the front of the second connecting piece is set as a concave arc surface, and correspondingly, the rear surface of the front leg is also set as a circular arc, and the rear surface of the front leg matches the shape of the arc surface of the second connecting piece when the baby carriage is in the unfolded state.

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