A child's pushchair

Abstract

The utility model discloses a kind of children's pushchairs, which can be converted between unfolded state and folding state, the children's pushchair includes upper support, front support, rear support, first linkage, second linkage, third linkage, the connecting seat of fixed connection with second linkage front side, the supporting seat fixedly connected in first linkage, front support rear side, rear support front side and upper support downside are pivotally connected with each other;Supporting seat includes a support part, connecting seat front side is pivotally connected with supporting seat, third linkage downside is pivotally connected with second linkage or / and connecting seat;When children's pushchair is in unfolded state, connecting seat downside is abutted with the upper end of support part.Such, even if front support is impacted, because first linkage rear side does not rotate downward, the tendency of first linkage rear side rotating upward is prevented by connecting seat blocking support part;So the tendency of front support rotating backward is eliminated, and the stability of the utility model children's pushchair in unfolded state is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of infant and toddler products, and in particular to a children's stroller. Background Technology

[0002] With economic development, more and more products are available on the market to make caring for infants and toddlers more convenient, and strollers are one of the most important products. Infants and toddlers sit or lie in strollers while parents push them, reducing the burden of carrying the child. Therefore, strollers are widely used in families with children.

[0003] To enhance ease of use, strollers are typically designed to switch between an unfolded and folded configuration. This allows them to be folded when not in use or when transporting the stroller, as the folded size is smaller than the unfolded state. For the average user, the simpler the folding and unfolding operation, the better, as it makes operation easier. Furthermore, since strollers are intended for children, ensuring stability in the unfolded state is crucial; the more stable the stroller is in this state, the safer the child inside is.

[0004] However, some strollers on the market are not well designed, which means that when the front frame of the stroller is hit, the front frame will rotate slightly backward, making the stroller unstable when it is unfolded; and the folding operation is cumbersome and laborious. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a children's stroller that can ensure the stability of the frame when unfolded, and whose folding operation is relatively simple and labor-saving.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A stroller is available that can switch between an unfolded state and a folded state. The stroller includes an upper support, a front support, and a rear support. The rear side of the front support, the front side of the rear support, and the lower side of the upper support are coaxially pivotally connected, or two of them are pivotally connected, and the third is pivotally connected to any one of the other two. The stroller also includes a first linkage, a second linkage, and a third linkage. The front side of the first linkage is pivotally connected to the front support, the rear side of the second linkage is pivotally connected to the rear support, and the upper side of the third linkage is pivotally connected to the upper support. The first linkage is fixedly connected to a support base, the support base including components connected to the first... The stroller includes a main body fixedly connected by a linkage, a support extending to one side from the main body, and the support is located behind the pivot point of the first linkage and the front bracket; the stroller also includes a connecting seat, the connecting seat being pivotally connected to the main body and / or the first linkage, the front side of the second linkage being fixedly connected to the connecting seat, and the lower side of the third linkage being pivotally connected to the second linkage and / or the connecting seat, or the lower side of the third linkage being fixedly connected to the connecting seat, and the front side of the second linkage being pivotally connected to the third linkage and / or the connecting seat; when the stroller is in the unfolded state, the lower side of the connecting seat abuts against the upper end of the support.

[0008] The front side of the connecting seat is pivotally connected to the front side of the main body around a pivot axle one. When the lower side of the third linkage is pivotally connected to the second linkage or / and the connecting seat around a pivot axle two, the pivot axle two is located behind the pivot axle one when the stroller is in the unfolded state; or, when the lower side of the third linkage is fixedly connected to the connecting seat and the front side of the second linkage is pivotally connected to the connecting seat, the position where the front side of the second linkage is pivotally connected to the connecting seat is also located behind the pivot axle one.

[0009] The support extends from the lower side of the body to one side.

[0010] The first linkage is configured as the seating portion of a seat, or the first linkage is configured to be connected to the seating portion of a seat; or the first linkage is configured to be connectable to a seat.

[0011] The stroller also includes a handle and a fourth linkage. The rear side of the handle is pivotally connected to the rear support, the upper support, or the front support, or the rear side of the handle is coaxially pivotally connected to the lower side of the upper support to the rear support or the front support. One side of the fourth linkage is pivotally connected to the handle and the other side is pivotally connected to the third linkage. The pivot position of the fourth linkage and the third linkage is located between the upper and lower sides of the third linkage.

[0012] The stroller also includes a mounting base. Of the three components—the lower side of the upper bracket, the rear side of the front bracket, and the front side of the rear bracket—one is fixedly connected to the mounting base, while the other two are pivotally connected to the mounting base.

[0013] The elastic element is configured as an elastic band, with buckles on both the front and rear sides of the elastic band. The front and rear supports are respectively provided with locking pins, and the buckles on the front and rear sides of the elastic band are respectively secured to the locking pins on the front and rear supports.

[0014] The elastic element is configured as a compression spring or a tension spring.

[0015] The stroller also includes a basket, the front and rear sides of which are connected to the front and rear supports respectively; all the elastic elements are located outside the basket, or the front and rear sides of the basket are provided with perforations, the part of the elastic element located between the front and rear sides is located inside the basket, and the front and rear sides of the elastic element pass through the perforations on the front and rear sides of the basket respectively and are connected to the front and rear supports.

[0016] Because this utility model adopts the above-mentioned technical solution, it has the following beneficial effects:

[0017] 1. When the stroller is in the unfolded state, even if the front support is impacted or hits an object during pushing and tends to rotate backward, the upward rotation tendency of the rear side of the first linkage is prevented by the connection seat blocking the support due to the lower side of the connecting seat abutting against the upper end of the support. In other words, the rear side of the first linkage cannot rotate upward; in addition, the upper support does not rotate downward, so the third linkage does not rotate downward, and thus the rear side of the first linkage and the front side of the second linkage do not rotate downward. That is, the rotation tendency of the first linkage, whether upward or downward, is blocked. Thus, the tendency of the front support to rotate backward is eliminated, thereby ensuring the stability of the stroller in the unfolded state and ensuring the safety of the child inside the stroller.

[0018] 2. To fold this practical children's stroller, simply rotate the upper support downwards and backwards. This will drive the third linkage to rotate downwards, causing the rear of the first linkage and the front of the second linkage to also rotate downwards. In this way, the front and rear supports will rotate towards each other until the components can no longer rotate relative to each other, at which point the stroller will be fully folded. Thus, the folding and closing operation of this practical children's stroller is simple and effortless.

[0019] 3. Because an elastic element is provided between the front and rear supports, during the folding process of the stroller, the elastic element can automatically pull the front and rear supports to rotate towards each other due to its elastic restoring force. In this way, the elastic element provides an additional force for folding the stroller, making the folding operation of this stroller more effortless. Moreover, because the elastic element can also make the front and rear supports rotate towards each other more quickly, the stroller can be folded up even faster.

[0020] 4. When the frame is in the unfolded state, even if the elastic restoring force of the elastic element causes the front and rear supports to be subjected to opposing tensions, the above-mentioned design prevents the first linkage from rotating either upwards or downwards. In other words, the tendency of the front support to rotate backwards is eliminated, and the stability of the frame in the unfolded state is still guaranteed. Attached Figure Description

[0021] Figure 1 This is a plan view of the practical children's stroller in its unfolded state;

[0022] Figure 2 This is a three-dimensional diagram of the practical children's stroller in its unfolded state;

[0023] Figure 3 According to Figure 1 A cross-sectional view along the AA direction;

[0024] Figure 4 According to Figure 1 Enlarged schematic diagram of part B;

[0025] Figure 5 According to Figure 2 An enlarged view of part C from another angle;

[0026] Figure 6 According to Figure 5 Exploded and magnified schematic diagram of the middle component;

[0027] Figure 7 This is a plan view of the folding process of this practical children's stroller;

[0028] Figure 8 according to Figure 7 A diagram showing the flexible components is hidden.

[0029] Figure 9 According to Figure 8 An enlarged schematic diagram of section D in the middle;

[0030] Figure 10 According to Figure 3 A planar diagram illustrating the closing process;

[0031] Figure 11 This is a plan view of the practical children's stroller in its folded state;

[0032] Figure 12 According to Figure 3 A planar diagram of the folded state;

[0033] Figure 13 This is a diagram illustrating the configuration of a vegetable basket for this practical children's stroller. Detailed Implementation

[0034] like Figures 1 to 6 As shown, this utility model discloses a stroller that can switch between an unfolded state and a folded state. The stroller includes an upper support 1, a front support 2, and a rear support 3. The rear side of the front support 2, the front side of the rear support 3, and the lower side of the upper support 1 are coaxially pivotally connected, or two of them are pivotally connected, and the third is pivotally connected to any one of the two. The stroller also includes a first linkage 51, a second linkage 52, and a third linkage 53. The front side of the first linkage 51 is pivotally connected to the front support 2, the rear side of the second linkage 52 is pivotally connected to the rear support 3, and the upper side of the third linkage 53 is pivotally connected to the upper support 1. The lower side is coaxially pivotally connected to the front side of the first linkage 51 and the second linkage 52, or two of them are pivotally connected, and the third is pivotally connected to any one of the two. The first linkage 51 is fixed with... A support base 54 is fixedly connected to the stroller. The support base 54 includes a body 541 fixedly connected to the first linkage member 51 and a support portion 542 extending to one side from the body 541. The support portion 542 is located behind the pivot position of the first linkage member 51 and the front bracket 2. The stroller also includes a connecting seat 55. The front side of the connecting seat 55 is pivotally connected to the front side of the body 541. The front side of the second linkage member 52 is fixedly connected to the connecting seat 55. The lower side of the third linkage member 53 is pivotally connected to the second linkage member 52 and / or the connecting seat 55. Alternatively, the lower side of the third linkage member 53 is fixedly connected to the connecting seat 55, and the front end of the second linkage member 52 is pivotally connected to the third linkage member 53 and / or the connecting seat 55. When the stroller is in the unfolded state, the lower side of the connecting seat 55 abuts against the upper end of the support portion 542.

[0035] The front side of the connecting seat 55 is pivotally connected to the front side of the main body 541 and / or the first linkage member 51 around the first pivot 543. When the lower side of the third linkage member 53 is pivotally connected to the second linkage member 52 and / or the connecting seat 55 around the second pivot 530, the second pivot 530 is located behind the first pivot 543 when the stroller is in the unfolded state; or, when the lower side of the third linkage member 53 is fixedly connected to the connecting seat 55 and the front side of the second linkage member is pivotally connected to the connecting seat, the second pivot is also located behind the first pivot. The pivot position of the first linkage member 51 and the front bracket is located in front of the first pivot 543; the pivot position of the rear side of the second linkage member 52 and the rear bracket is located behind the second pivot.

[0036] Because this utility model adopts the above-mentioned configuration, when the stroller is in the unfolded state, if the front support 2 is impacted or if the front support 2 hits an object during pushing, the front support 2 will tend to rotate backward due to the impact, and the first linkage 51 pivotally connected to the front support 2 will also tend to rotate accordingly; however, because the lower side of the connecting seat 55 abuts against the upper end of the support 542, the potential upward rotation of the rear side of the first linkage 51 is prevented by the connecting seat 55 blocking the support 542; furthermore Since the upper support 1 will not rotate downwards, the third linkage 53 will not rotate downwards, and consequently the rear side of the first linkage 51 and the front side of the second linkage 52 will not rotate downwards either. That is, the rotational tendency of the first linkage 51, whether upwards or downwards, is blocked. Therefore, even if the front support 2 is impacted, its tendency to rotate backwards will be eliminated, that is, the front support 2 will not rotate backwards, thereby ensuring the stability of this practical stroller in the unfolded state. In this way, the safety of this practical stroller is protected during the process of being pushed forward, that is, the safety of the child in the stroller is protected.

[0037] In this embodiment, the front side of the connecting seat 55 is pivotally connected to the support seat body 54 and / or the first linkage member. Therefore, when the stroller is in the unfolded state, the larger the contact area between the connecting seat 55 and the body 54, the better the blocking effect of the connecting seat 55 on the upward rotation of the body 54, and the more stable the stroller is in the unfolded state.

[0038] Combination Figures 7 to 10 As shown, when folding this practical children's stroller, simply rotate the upper support 1 downwards and backwards. This will drive the third linkage 53 to rotate downwards, causing the rear of the first linkage 51 and the front of the second linkage 52 to also rotate downwards. This allows the front support 2 and the rear support 3 to rotate towards each other until the components can no longer rotate relative to each other, at which point the stroller is in a fully folded state (as shown). Figure 11 , 12 (As shown). Thus, the folding and closing operation of this practical children's stroller is simple and effortless.

[0039] During the folding and unfolding of the stroller, as the rear side of the first linkage 51 and the front side of the second linkage 52 rotate downwards, the rear side of the connecting seat 55 rotates upwards relative to the support seat 54 and disengages from the upper end of the support part 542 (e.g., Figure 9 (As shown).

[0040] Preferably, the support portion 542 extends to one side from the lower side of the body 541, thereby making the upper end of the connecting seat 55 approximately flush with the upper end of the support seat 54. This arrangement makes the overall structure at the corresponding position more compact. The support portion 542 can be integrally formed with the lower part of the body 541, or the two can be two interconnected components.

[0041] The first linkage 51 is configured as the seating portion of a seat (not shown), or the first linkage 51 is configured to interact with the seating portion 8 of a seat (e.g., Figure 12 (As shown) Connection. In this embodiment, the seating portion 8 of the seat is connected to the first linkage 51, and the lower side of the seat backrest 9 is pivotally connected to the rear support 3. In other embodiments, the lower side of the seat backrest 9 may also be pivotally connected to the rear side of the first linkage, or the first linkage may be configured to be connected to a seat (not shown), and the entire seat may be detachably connected to the first linkage.

[0042] In this embodiment, the stroller further includes a handle 6 and a fourth linkage 56. The rear side of the handle 6 is pivotally connected to the rear support 3, the front support 2, or the upper support 1; alternatively, the rear side of the handle 6 is coaxially pivotally connected to the lower side of the upper support 1 to the rear support 3 or the front support 2. One side of the fourth linkage 56 is pivotally connected to the handle 6, and the other side is pivotally connected to the third linkage 53. The pivot point between the fourth linkage 56 and the third linkage 53 is located between the upper and lower sides of the third linkage 53. When folding the stroller, rotating the upper support 1 downwards and backwards causes the fourth linkage 56 to rotate downwards as the first linkage 51 rotates downwards, thereby pulling the handle 6 forwards and downwards, thus folding the handle 6. This design makes the folding operation of the stroller simpler.

[0043] In this embodiment, the upper support 1 includes a push handle 11 and a connecting tube 12. The push handle 11 and the connecting tube 12 are pivotally connected to the rear support 3 at their lower sides, and the push handle 11 can rotate between forward and backward positions (not shown in the figure). When the push handle 11 is in the backward position, it can rotate backward and downward together with the connecting tube 12 to fold the stroller. The upper side of the third linkage 53 is pivotally connected to the connecting tube 12. The structure of the push handle 11 reversing direction can be found in Chinese Utility Model Patent CN202420289610.7 (patent title: "A Stroller", application date: 2024-02-07).

[0044] In other embodiments, the upper bracket 1 may not be provided with a connecting pipe 12, but may be directly provided as a push handle 11, and the push handle 11 may not be reversed, with the upper side of the third linkage 53 pivotally connected to the push handle 11.

[0045] The stroller also includes a mounting base 7. Of the three components—the lower side of the upper bracket 1, the rear side of the front bracket 2, and the front side of the rear bracket 3—one is fixedly connected to the mounting base 7, while the other two are pivotally connected to the mounting base 7. In this embodiment, the front side of the rear bracket 3 is fixedly connected to the mounting base 7, and the lower side of the upper bracket 1 and the rear side of the front bracket 2 are both pivotally connected to the mounting base 7. That is to say, the connecting tube 12 and the lower side of the push handle 11 are both pivotally connected to the mounting base 7.

[0046] The stroller of this utility model also includes an elastic element 4, which is connected to the front support 2 and the rear support 3 on its front and rear sides respectively. The elastic element 4 is configured such that during the folding process of the stroller, the elastic element 4 can pull the front support 2 and the rear support 3 to rotate in opposite directions.

[0047] In this embodiment, the elastic element 4 is configured as an elastic band, with buckles 41 on both its front and rear sides. The front support 2 and rear support 3 are respectively provided with locking pins 42. The buckles 41 on both sides of the elastic band are secured to the locking pins 42 on the front support 2 and rear support 3, respectively. Thus, when the stroller is in the unfolded state, the elastic band is stretched because the front support 2 and rear support 3 cannot rotate relative to each other. During the stroller's folding process, the front support 2 and rear support 3 can rotate relative to each other, allowing the elastic restoring force of the elastic band to pull the front support 2 and rear support 3 closer together more quickly. Preferably, the elastic element 4 is configured to have a certain width for better elasticity; it can also be an elastic cord. In other embodiments, the elastic band can be connected to the front and rear supports using other known and feasible methods.

[0048] In other embodiments, the elastic element 4 can also be configured as a compression spring. Similarly, when the stroller is in the unfolded state, the compression spring is in the stretched state; when the stroller is folded, the elastic restoring force of the compression spring can pull the front support 2 and the rear support 3 to rotate towards each other more quickly.

[0049] In another embodiment, the elastic element 4 is set as a tension spring. Similarly, when the stroller is in the unfolded state, the tension spring is in the stretched state. When the stroller is folded up, the elastic restoring force of the tension spring can pull the front support 2 and the rear support 3 to rotate towards each other more quickly.

[0050] The connection between the compression spring, tension spring and the front support 2 and rear support 3 can be any known and feasible method, as long as it can achieve the above functions and will not detach from the front support 2 and rear support 3 when the stroller is unfolded or during unfolding / folding.

[0051] That is to say, the elastic element 4 can be any feasible elastic element 4 with good elastic deformation and elastic recovery force.

[0052] Because of the aforementioned elastic element 4, during the folding process of this practical children's stroller, the elastic restoring force of the elastic element 4 can automatically pull the front support 2 and the rear support 3 to rotate in opposite directions. In this way, the elastic element 4 provides an additional force for folding the stroller, making it easier for the operator to fold the stroller. Moreover, because the elastic element 4 can also make the front support 2 and the rear support 3 rotate towards each other more quickly, the stroller can be folded up even faster.

[0053] When the stroller is in the unfolded state, because the elastic element 4 is in a tensioned state, the front support 2 and the rear support 3 are always subjected to opposing pulling forces from the elastic element 4. However, similarly, because the upper end of the support part 542 of the support seat 54 abuts against the lower side of the connecting seat 55, the potential upward rotation tendency of the rear side of the first linkage 51 is prevented by the connecting seat 55 blocking the support part 542. In addition, because the upper support 1 does not rotate downward, the rear side of the first linkage 51 and the front side of the second linkage 52 also do not rotate downward. That is, the rotation tendency of the first linkage is blocked whether it is upward or downward, so the stability of the frame in the unfolded state can still be guaranteed.

[0054] like Figure 13 As shown, in this embodiment, the child likely also includes a vegetable basket 10, with its front and rear sides connected to the front support 2 and the rear support 3, respectively. The elastic element 4 can be entirely located outside the vegetable basket 10, or it can have perforations on its front and rear sides, with the portion of the elastic element 4 located between the front and rear sides inside the vegetable basket 10. The front and rear sides of the elastic element 4 pass through the perforations on the front and rear sides of the vegetable basket and connect to the front support 2 and the rear support 3, respectively. When the elastic element is set as an elastic band and has buckles 41 connected to both its front and rear sides, the buckles on the front and rear sides pass through the perforations on the corresponding sides and connect to the front support 2 and the rear support 3, respectively.

[0055] The connection method between the vegetable basket 10 and the front support 2 and the rear support 3 can be any known and feasible technology.

[0056] The stroller also includes a locking mechanism mounted on the stroller and capable of locking the stroller in the unfolded state. The locking mechanism is located between the lower side of the connecting tube 12 and the mounting base 7. An unlocking device 121 is movably connected to the upper end of the connecting tube 12, and the unlocking device 121 is connected to the locking mechanism via a connector. Driving the unlocking device unlocks the locking mechanism through the connector. The locking mechanism may include a locking member that can move relatively vertically and is connected to the lower side of the connecting tube 12, a locking hole located at a corresponding position on the mounting base 7, and a spring located between the locking member and the connecting tube 12. Under the action of the spring, the lower side of the locking member engages in a locking groove (not shown), thus preventing relative rotation between the connecting tube 12 and the mounting base 7, and locking the stroller in the unfolded state. The connector may be a traction cable, with its lower side connected to the locking member and its upper end connected to the unlocking device 121. Driving the unlocking device causes the traction cable to pull the locking member upward, causing the locking member to move upward and disengage from the locking groove, thus unlocking the locking mechanism. The connecting tube 12 and the mounting base 7 can rotate relative to each other, thereby enabling the folding and unfolding of this practical children's stroller.

[0057] In other embodiments, the locking mechanism and unlocking mechanism can also refer to Chinese Utility Model Patent CN202420289610.7, or the locking mechanism and unlocking device can be any known and feasible structure, and the locking mechanism can also be located between any two of the upper support 1, front support 2, rear support 3, first linkage 51, second linkage 52, third linkage 53, fourth linkage 56, and handrail 6 that are pivotally connected; the unlocking device can also be adapted. Since the locking mechanism and unlocking operation are not the inventive point of this utility model, they will not be described in detail here.

[0058] The front lower part of the front bracket 2 is connected to the front wheel 20, and the rear lower part of the rear bracket 3 is connected to the rear wheel 30.

[0059] The above definitions of up, down, front, back, left, and right directions are for reference under normal use conditions, that is, the direction where the front wheel 20 is located is front, the direction where the rear wheel 30 is located is rear, the direction where the upper bracket 1 is located is up, and the direction where the front wheel 20 and the rear wheel 30 are located is down. Those skilled in the art should understand that the above terms "up", "down", "left", "right", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. When the viewing perspective changes, the above orientation or positional relationship will also change accordingly, and therefore should not be construed as a limitation of this utility model.

[0060] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A stroller that can switch between an unfolded state and a folded state, the stroller comprising an upper support, a front support, and a rear support, wherein the rear side of the front support, the front side of the rear support, and the lower side of the upper support are coaxially pivotally connected, or two of them are pivotally connected, and the third is pivotally connected to any one of the two of them, characterized in that: The stroller further includes a first linkage, a second linkage, and a third linkage. The front side of the first linkage is pivotally connected to the front support, the rear side of the second linkage is pivotally connected to the rear support, and the upper side of the third linkage is pivotally connected to the upper support. A support seat is fixedly connected to the first linkage. The support seat includes a body fixedly connected to the first linkage and a support portion extending to one side from the body. The support portion is located behind the pivot point of the first linkage and the front support. The stroller further includes a connecting seat. The connecting seat is pivotally connected to the body and / or the first linkage. The front side of the second linkage is fixedly connected to the connecting seat, and the lower side of the third linkage is pivotally connected to the second linkage and / or the connecting seat. Alternatively, the lower side of the third linkage is fixedly connected to the connecting seat, and the front side of the second linkage is pivotally connected to the third linkage and / or the connecting seat. When the stroller is in the unfolded state, the lower side of the connecting seat abuts against the upper end of the support portion.

2. The stroller according to claim 1, characterized in that: The front side of the connecting seat is pivotally connected to the main body or / and the front side of the first linkage member around the first pivot. When the lower side of the third linkage member is pivotally connected to the second linkage member or / and the connecting seat around the second pivot, the second pivot is located behind the first pivot when the stroller is in the unfolded state; or, when the lower side of the third linkage member is fixedly connected to the connecting seat and the front side of the second linkage member is pivotally connected to the connecting seat, the position where the front side of the second linkage member is pivotally connected to the connecting seat is also located behind the first pivot.

3. The stroller according to claim 1, characterized in that: The support extends from the lower side of the body to one side.

4. The stroller according to claim 2, characterized in that: The support extends from the lower side of the body to one side.

5. The stroller according to any one of claims 1 to 4, characterized in that: The first linkage is configured as the seating portion of a seat, or the first linkage is configured to be connected to the seating portion of a seat; or the first linkage is configured to be connectable to a seat.

6. The stroller according to any one of claims 1 to 4, characterized in that: It also includes a handrail and a fourth linkage member, wherein the rear side of the handrail is pivotally connected to the rear support, the upper support, or the front support, or the rear side of the handrail is coaxially pivotally connected to the lower side of the upper support to the rear support or the front support; one side of the fourth linkage member is pivotally connected to the handrail, and the other side is pivotally connected to the third linkage member, and the pivot position of the fourth linkage member and the third linkage member is located between the upper and lower sides of the third linkage member.

7. The stroller according to claim 5, characterized in that: It also includes a handrail and a fourth linkage member, wherein the rear side of the handrail is pivotally connected to the rear support, the upper support, or the front support, or the rear side of the handrail is coaxially pivotally connected to the lower side of the upper support to the rear support or the front support; one side of the fourth linkage member is pivotally connected to the handrail, and the other side is pivotally connected to the third linkage member, and the pivot position of the fourth linkage member and the third linkage member is located between the upper and lower sides of the third linkage member.

8. The stroller according to any one of claims 1 to 4 and 7, characterized in that: It also includes a mounting base. Of the three components—the lower side of the upper bracket, the rear side of the front bracket, and the front side of the rear bracket—one is fixedly connected to the mounting base, while the other two are pivotally connected to the mounting base.

9. The stroller according to claim 5, characterized in that: It also includes a mounting base. Of the three components—the lower side of the upper bracket, the rear side of the front bracket, and the front side of the rear bracket—one is fixedly connected to the mounting base, while the other two are pivotally connected to the mounting base.

10. The stroller according to claim 6, characterized in that: It also includes a mounting base. Of the three components—the lower side of the upper bracket, the rear side of the front bracket, and the front side of the rear bracket—one is fixedly connected to the mounting base, while the other two are pivotally connected to the mounting base.

11. The stroller according to any one of claims 1 to 4, 7, 9 to 10, characterized in that: It also includes an elastic element, the front and rear ends of which are connected to the front support and the rear support, respectively. The elastic element is configured such that during the folding process of the stroller, the elastic element can pull the front support and the rear support to rotate in opposite directions.

12. The stroller according to claim 11, characterized in that: The elastic element is configured as an elastic band.

13. The stroller according to claim 5, characterized in that: It also includes an elastic element, the front and rear ends of which are connected to the front support and the rear support, respectively. The elastic element is configured such that during the folding process of the stroller, the elastic element can pull the front support and the rear support to rotate in opposite directions.

14. The stroller according to claim 13, characterized in that: The elastic element is configured as an elastic band.

15. The stroller according to claim 6, characterized in that: It also includes an elastic element, the front and rear ends of which are connected to the front support and the rear support, respectively. The elastic element is configured such that during the folding process of the stroller, the elastic element can pull the front support and the rear support to rotate in opposite directions.

16. The stroller according to claim 15, characterized in that: The elastic element is configured as an elastic band.

17. The stroller according to claim 8, characterized in that: It also includes an elastic element, the front and rear ends of which are connected to the front support and the rear support, respectively. The elastic element is configured such that during the folding process of the stroller, the elastic element can pull the front support and the rear support to rotate in opposite directions.

18. The stroller according to claim 17, characterized in that: The elastic element is configured as an elastic band.

19. The stroller according to claim 12, 14, 16, or 18, characterized in that: The elastic band is provided with buckles on both the front and rear sides, and the front and rear supports are respectively provided with locking pins. The buckles on the front and rear sides of the elastic band are respectively secured with the locking pins on the front and rear supports.

20. The stroller according to claim 11, characterized in that: The elastic element is configured as a compression spring or a tension spring.

21. The stroller according to claim 13, 15, or 17, characterized in that: The elastic element is configured as a compression spring or a tension spring.

22. The stroller according to claim 11, characterized in that: It also includes a vegetable basket, the front and rear sides of which are connected to a front support and a rear support, respectively; all the elastic elements are located outside the vegetable basket, or, the front and rear sides of the vegetable basket are provided with perforations, the part of the elastic element located between the front and rear sides is located inside the vegetable basket, and the front and rear sides of the elastic element pass through the perforations on the front and rear sides of the vegetable basket and are connected to the front support and the rear support, respectively.

23. The stroller according to any one of claims 12 to 18, 20, characterized in that: It also includes a vegetable basket, the front and rear sides of which are connected to a front support and a rear support, respectively; all the elastic elements are located outside the vegetable basket, or, the front and rear sides of the vegetable basket are provided with perforations, the part of the elastic element located between the front and rear sides is located inside the vegetable basket, and the front and rear sides of the elastic element pass through the perforations on the front and rear sides of the vegetable basket and are connected to the front support and the rear support, respectively.

24. The stroller according to claim 17, characterized in that: It also includes a vegetable basket, the front and rear sides of which are connected to a front support and a rear support, respectively; all the elastic elements are located outside the vegetable basket, or, the front and rear sides of the vegetable basket are provided with perforations, the part of the elastic element located between the front and rear sides is located inside the vegetable basket, and the front and rear sides of the elastic element pass through the perforations on the front and rear sides of the vegetable basket and are connected to the front support and the rear support, respectively.

25. The stroller according to claim 19, characterized in that: It also includes a vegetable basket, the front and rear sides of which are connected to a front support and a rear support, respectively; all the elastic elements are located outside the vegetable basket, or, the front and rear sides of the vegetable basket are provided with perforations, the part of the elastic element located between the front and rear sides is located inside the vegetable basket, and the front and rear sides of the elastic element pass through the perforations on the front and rear sides of the vegetable basket and are connected to the front support and the rear support, respectively.

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