Cart

Abstract

A stroller includes a chassis and a seat supported by the chassis, the seat including a first panel and a second panel joined at respective first ends by a hinge having a hinge axis so as to define an angle between the first panel and the second panel about the hinge axis; the stroller has: an uncollapsed position in which the first panel forms at least a portion of the base of the seat and the second panel forms at least a portion of the backrest of the seat, the angle being less than 180 degrees; and a collapsed position wherein the space occupied by the cart is reduced relative to the non-collapsed position; wherein the stroller transitions from an uncollapsed state to a collapsed state by rotating the second leg and the fourth leg in a first direction about the first rotational coupling and the second rotational coupling towards the first handle strut and the second handle strut, rotation of the second and fourth legs toward the first and second handle struts causes the first panel to pivot about the hinge in a first direction such that an angle between the first panel and the second panel increases.

Description

Technical Field

[0001] This utility model relates to a trolley. Background Technology

[0002] Many strollers need to be folded down or collapsed into a convenient small size for easy storage at home or in transportation, especially in the small spaces available on airplanes.

[0003] Advantageously, folding the cart is easy and preferably can be done with only one hand, while avoiding unintentional operation. Finally, the mechanism for performing these functions should be compact and robust. Summary of the Invention

[0004] According to a first aspect of the present invention, a trolley is provided, the trolley comprising a base frame and a seat supported by the base frame.

[0005] The seat includes a first panel and a second panel, each having a first end and a second end. The first panel and the second panel are joined at their respective first ends by a hinge having a hinge axis, so as to define an angle between the first panel and the second panel about the hinge axis.

[0006] The base frame includes a first leg, a second leg, a third leg, and a fourth leg, as well as a first handle support and a second handle support, wherein:

[0007] The first leg, the second leg, and the first handle support are joined by a first rotary coupling, so that the first leg, the second leg, and the first handle support can rotate about a common axis.

[0008] The third and fourth legs and the second handle support are engaged by a second rotary coupling spaced apart from the first rotary coupling, such that the third and fourth legs and the second handle support can rotate about a common axis.

[0009] The seat includes a shaft mounted at the second end of a first panel and connected between a first rotary coupling member and a second rotary coupling member. The shaft is coaxial with a common axis, and the second end of the first panel is pivotally coupled to the shaft, allowing the second end of the first panel to pivot about the common axis.

[0010] The cart is arranged to have:

[0011] Uncollapsed positions, where:

[0012] The first panel forms at least a portion of the base of the seat, on which a occupant can sit, and the second panel forms at least a portion of the backrest of the seat; and

[0013] The angle between the first panel and the second panel is a first angle less than 180 degrees; and

[0014] The collapse position, where:

[0015] The space occupied by the trolley is reduced relative to its unfolded position; and

[0016] Specifically, by rotating the second and fourth legs in a first direction (in a first sense) around the first and second rotary couplers toward the first and second handle posts, the trolley is arranged to transition from an unfolded state to a folded state. The rotation of the second and fourth legs toward the first and second handle posts causes the first panel to pivot about the hinge in the first direction, thereby increasing the angle between the first and second panels.

[0017] Therefore, when the trolley is folded, the occupant moves a portion of the seat base from its unfolded position closer to being coplanar with at least a portion of the backrest. This allows the folded form of the trolley to fit between the handleposts in the folded state, thus occupying less space than in other cases.

[0018] In the folded state, the angle between the first panel and the second panel will be a second angle that is closer to 180 degrees than the first angle. The second angle can be 180 degrees, typically in which the first panel and the second panel are coplanar.

[0019] There may be at least one coupling linkage that engages the first panel to at least one of the second and fourth legs; there may be two coupling linkages, one engaging the first panel to the second leg and the other engaging the second panel to the fourth leg. Each coupling linkage can cause the first panel to rotate together with the first and second handle supports.

[0020] The base may further include a handle, the handle including a U-shaped member having a first end and a second end, the first end of the U-shaped member being coupled to the first handle post at an end of the first handle post away from the first rotary coupling member, and the second end of the U-shaped member being coupled to the second handle post at an end of the second handle post away from the second rotary coupling member.

[0021] The handle may be provided with a first handle coupling and a second handle coupling, wherein the handle is rotatably coupled to a first handle post via the first handle coupling, and wherein the handle is rotatably coupled to a second handle post via the second handle coupling. Typically, the first and second handle couplings will allow the handle to rotate about the first and second handle couplings about a common handle axis.

[0022] Typically, the handle may be provided with at least one drive coupling member, through which the handle is coupled to at least one of a second leg and a fourth leg; typically there are a first drive coupling member and a second drive coupling member, the first drive coupling member coupling the handle to the second leg and the second drive coupling member coupling the handle to the fourth leg. Each drive coupling member may be arranged such that when the handle rotates relative to the first handle post and the second handle post in a first direction, it drives the second leg and / or the fourth leg to rotate about a common axis in the first direction.

[0023] Therefore, by rotating the handle relative to the handle post in the first direction, the user of the cart can cause the cart to change from a non-folded state to a folded state, as the second and fourth legs will move toward the handle post that is moving in the first state.

[0024] Each drive coupling may include a short post fixed to the handle and extending from the handle through a first handle coupling or a second handle coupling, and an arm connecting the short post to a second leg or a fourth leg.

[0025] Each of the second and fourth legs may be provided with an additional drive linkage that couples the second leg to the first leg and the fourth leg to the third leg, respectively. Each additional drive linkage may be arranged such that when the handle rotates relative to the first and second handle supports in a first direction, the first leg and / or the third leg is driven to rotate about a common axis in the first direction. Thus, the movement of the handle can be transmitted to all four legs, causing them to rotate toward the handle supports.

[0026] Each additional drive linkage may include: a short column rigidly coupled to a second or fourth leg; and an arm rotatably coupled to the short column at a first end and rotatably coupled to a first or third leg at a second end.

[0027] The effect of all the described movements is to fold the cart from a shape (which can be described as an approximately straight line from the handle to the first and third legs) into a compressed Z-shaped fold, where the handle forms the top horizontal stroke of the Z, the handle posts form the diagonal strokes of the Z, and the four legs overlap with the bottom horizontal stroke of the Z. This saves a significant amount of space compared to the unfolded position.

[0028] The seat may be equipped with a seat extension panel, which is pivotally mounted on an axle at a first end and is coplanar with the first panel in its unfolded state. The seat extension panel may be provided with at least one drive linkage, each drive linkage being coupled to each or one of additional drive linkages, and arranged such that movement of the additional drive linkages caused by movement of the handle relative to the handle post in a first direction causes the seat extension panel to rotate about the axis in that first direction. Thus, the seat extension panel can provide a large seat base for the occupant to sit on, but still folds neatly downwards along with the rest of the trolley via a hinge about the axis.

[0029] The trolley may be equipped with a carrying strap comprising a flexible elongated member having a first end and a second end, wherein the first end is connected at a first point to one of a first leg and a third leg, and the second end is connected at a second point to one of a second leg and a fourth leg. The strap will have a length that is approximately the same as (e.g., within 1%, 2%, or 5%) the distance between the first and second points in the unfolded state. Therefore, in the unfolded state, the strap will be taut or nearly taut, and thus, the strap will not pose a tripping or suffocation hazard when the trolley is used.

[0030] The distance between the first and second points in the collapsed state will typically be less than the length (i.e., 25% or 10% of the maximum value of the carrying strip), thereby allowing the carrying strip to become slack and usable as a carrying strip.

[0031] The strap can be elastic and has a length that is measured without a load applied to it. When using this strap to suspend a trolley, the strap can have an extended length that is at least 5% or 10% greater than the original length. The elasticity of the strap makes it easier to tighten when not folded and provides greater comfort for the user when carrying the trolley in the folded state.

[0032] The strap can be elastic and has a length that is measured without a load applied to it. When using this strap to suspend a trolley, the strap can have an extended length that is at least 5% or 10% greater than the original length. The elasticity of the strap makes it easier to tighten when not folded and provides greater comfort for the user when carrying the trolley in the folded state.

[0033] The first point can be close to the first or second rotary coupling (e.g., within 10 cm or 5 cm of it), and the second point can be close to the distal end of the second or fourth leg relative to the rotary coupling (e.g., within 10 cm or 5 cm of it). This keeps the carrying strap away from the ground when using the trolley to prevent it from obstructing items on the ground.

[0034] The trolley may be equipped with a fabric cover that covers both the first and second panels; this provides comfort for the rider. The fabric cover can couple the movement of the second panel to the first and second handle supports.

[0035] The reverse of the aforementioned motion that causes the transition from the uncollapsed state to the collapsed state can cause the transition from the collapsed state to the uncollapsed state.

[0036] Each of the first, second, third, and fourth legs may have a wheel rotatably mounted thereon at an end remote from the first or second rotatable coupling member. The wheels of the first and second legs may be spaced further apart (or vice versa) from the wheels of the third and fourth legs parallel to a common axis, such that, in the folded state, the wheels of the third and fourth legs may be positioned inward parallel to the common axis of the wheels of the first and second legs (or vice versa).

[0037] According to a second aspect of the present invention, we provide a trolley comprising a base frame and a seat supported by the base frame.

[0038] The base frame includes a first leg, a second leg, a third leg, and a fourth leg, as well as a first handle support and a second handle support, wherein:

[0039] The first leg, the second leg, and the first handle support are joined by a first rotary coupling, so that the first leg, the second leg, and the first handle support can rotate about a common axis.

[0040] The third and fourth legs and the second handle support are engaged by a second rotary coupling spaced apart from the first rotary coupling, such that the third and fourth legs and the second handle support can rotate about a common axis.

[0041] The trolley is arranged to have an unfolded position and a folded position, wherein the space occupied by the trolley in the folded position is reduced relative to the unfolded position;

[0042] The trolley is equipped with a carrying strap, which includes a flexible elongated member having a first end and a second end. The first end is connected at a first point to one of a first leg and a second leg, and the second end is connected at a second point to one of a third leg and a fourth leg.

[0043] Therefore, this provides a convenient carrying strap that is unlikely to pose a tripping or suffocation hazard when not folded up.

[0044] The strip will have a length that is approximately the same as the distance between the first and second points in the unfolded state (e.g., within 1%, 2%, or 5%). Therefore, in the unfolded state, the strip will be taut or nearly taut, and thus will not pose a tripping or suffocation hazard when using the cart.

[0045] The distance between the first and second points in the collapsed state will typically be less than the length (i.e., 25% or 10% of the maximum value of the carrying strip), thereby allowing the carrying strip to become slack and usable as a carrying strip.

[0046] The first point can be close to the first or second rotary coupling (e.g., within 10 cm or 5 cm of it), and the second point can be close to the distal end of the second or fourth leg relative to the rotary coupling (e.g., within 10 cm or 5 cm of it). This keeps the carrying strap away from the ground when using the trolley to prevent it from obstructing items on the ground.

[0047] The carrying strap is particularly useful when the trolley is arranged to transition from a non-folded state to a folded state by rotating the second and fourth legs about the first and second rotary couplers toward the handle support in a first direction, so that the second and fourth legs, as well as the first and third legs, all move closer together, thereby reducing the distance between the first and second points.

[0048] The trolley can be according to the first aspect of this utility model. Attached Figure Description

[0049] Embodiments of the present invention will now be described by way of example only with reference to the accompanying drawings, in which:

[0050] Figure 1 A perspective view of a trolley in an unfolded state according to an embodiment of the present invention is shown;

[0051] Figure 2 Shown without fabric covering Figure 1 A perspective view of the cart;

[0052] Figure 3 Shown without fabric covering Figure 1 Side view of the cart;

[0053] Figure 4 , Figure 6 and Figure 8 The image shows an uncovered structure in a gradually folded-down state. Figure 1 Perspective view of the cart;

[0054] Figure 5 , Figure 7 and Figure 9It shows that in relation to Figure 4 , Figure 6 and Figure 8 The same type of fabric covering is in a gradually folded-over state. Figure 1 Side view of the cart. Detailed Implementation

[0055] The accompanying drawings show a trolley 1 according to an embodiment of the present invention. The trolley 1 includes a base frame 2 supporting a seat 3. The seat 3 has... Figure 1 Fabric covering 4 is shown in the image.

[0056] In the attached diagram Figures 2 to 9 The diagram shows a trolley 1 without the fabric cover 4. The base 2 includes four legs: a first leg 5 and a second leg 6 located at the front and rear of the left side of the trolley, respectively, and a third leg 7 and a fourth leg 8 located at the front and rear of the right side, respectively. The base 2 also includes a first handle support 9 located on the left side and a second handle support 10 located on the right side.

[0057] A first rotary coupling 51 and a second rotary coupling 52 are provided such that the first rotary coupling 51 couples the first leg 5 and the second leg 6 to the first handle post 9, while the second rotary coupling 52 couples the third leg 7 and the fourth leg 8 to the second handle post 10. The first rotary coupling 51 allows the first leg 5 and the second leg 6, as well as the first handle post 10, to rotate about a common axis 21, while the second rotary coupling 52 allows the third leg 7 and the fourth leg 8, as well as the second handle post, to rotate about the common axis 21.

[0058] Wheels 39 are disposed at the end of each of the first leg 5, the second leg 6, the third leg 7, and the fourth leg 8. The wheels 39 on the first leg 5 and the third leg 7 are spaced further apart from the wheels 39 on the second leg 6 and the fourth leg 8, parallel to the common axis 21.

[0059] The base frame further includes a handle 26 in the form of a U-shaped member, which engages at the ends of the first handle post 9 and the second handle post 10 away from the first rotary coupling 51 and the second rotary coupling 52. The handle 26 is coupled to the first handle post 9 via a first handle coupling 27 and to the second handle post 10 via a second handle coupling 28, wherein the first handle coupling 27 and the second handle coupling 28 allow the handle 26 to rotate relative to the first handle post 9 and the second handle post 10 about a common handle axis 29 parallel to a common axis 21.

[0060] The seat comprises multiple panels covered by a fabric covering 4 for occupant comfort. These include a first panel 11 and a second panel 12, which are joined together at a first end 17 of the first panel 11 and a first end 18 of the second panel by a hinge 13 defining a hinge axis 14 parallel to a common axis 21. (See attached figures.) Figures 1 to 3 In the unfolded state shown, the first panel 11 forms part of the seat base 15 on which a occupant can sit, and the second panel 12 forms the backrest 16 for the seat 3. The angle between the first panel 11 and the second panel 12 is slightly more than 90 degrees, typically around 115 to 165 degrees (which can be selected by the user for occupant comfort).

[0061] The first panel 11 is engaged at its second end 19 to a shaft 20, which extends between a first rotary coupler 51 and a second rotary coupler 52. Thus, the first panel 11 can rotate about a common axis 21 at its second end 19.

[0062] The seat also features a seat extension panel 22, in Figures 1 to 3 In the unfolded position shown, the seat extension panel 22 is coplanar with the first panel 11 and thus forms part of the seat base 15 on which a occupant can sit. The seat extension panel 22 is also pivotally connected to the shaft 20 at its first end 23. The seat extension panel 22 is provided with a leg rest ring 24, which includes a U-shaped member pivotally connected to the seat extension panel 22 at its second end 25 opposite to the first end 23, when... Figure 1 When the fabric covering shown covers the U-shaped component, the U-shaped component will serve as a leg rest for the rider.

[0063] The trolley is also equipped with several linkage components, which drive the parts of seat 3 and base frame 2. Figures 1 to 3 The uncollapsed state and Figures 8 to 9 The movement between the folded and collapsed states. These linkages include:

[0064] • The first coupling link 30 and the second coupling link (the second coupling link is not visible in the figure, but is a mirror image of the first coupling link) connect the first end 17 of the first panel 11 to the second leg 6 and the fourth leg 8 respectively, so that the first panel 11 will tend to rotate together with the second leg 6 and the fourth leg 6.

[0065] • A first drive coupling 31 and a second drive coupling 32, wherein the first drive coupling 31 couples the handle 26 to the second leg 6 and the second drive coupling 32 couples the handle 26 to the fourth leg 8. Each of the first drive coupling 31 and the second drive coupling 32 includes: a short post 33 rigidly attached to the handle 26 and extending from the handle 25 through the first handle coupling 27 or the second handle coupling 28; and an arm 34 pivotally coupled at one end to the short post 33 and to the corresponding second leg 6 or fourth leg 8.

[0066] • A first additional drive linkage 35 and a second additional drive linkage 36, wherein the first additional drive linkage couples the second leg 6 to the first leg 5, and the second additional drive linkage 36 couples the fourth leg 8 to the third leg 7. Each of the first additional drive linkage 35 and the second additional drive linkage 36 includes a short post 37 rigidly coupled to the second leg 6 or the fourth leg 7, respectively, and an arm 38 pivotally mounted at one end on the short post 37 and pivotally mounted at the other end on the corresponding first leg 5 or third leg 7.

[0067] • A first extension drive linkage 43 and a second extension drive linkage 44, each extension drive linkage including an arm 45, which is pivotally connected at one end to the seat extension panel 22 and to an arm 38 connected to the first leg 5 or the third leg 7.

[0068] The stroller is also equipped with a carrying strap 42 (in Figure 1 As shown in the diagram, the carrying strip 42 is formed as a strip of elastic webbing material or the like. One end of the carrying strip is attached to a first point 40 near the wheel 39 on the second leg 6, and the other end is attached to a second point 41 near the first rotary coupling member 51 on the first leg 5. In the uncollapsed state, the distance between the first point 40 and the second point 41 is approximately the same as the length of the carrying strip 42, so the carrying strip remains taut due to its elastic properties.

[0069] The function of the linkage can be seen in the attached diagram. As mentioned above, the linkage in the attached diagram... Figures 1 to 3 The stroller is shown in its unfolded state, providing a convenient seat for passengers such as children. However, sometimes it is desirable to fold the stroller to store it in a smaller space than when it is unfolded. Thus, via... Figure 4 and Figure 5 as well as Figure 6 and 7 The intermediate states shown in the diagram indicate that the cart can be moved from... Figures 1 to 3 The non-collapsed state shown in the figure is converted to the attached figure. Figures 8 to 9 The collapsed state is shown in the figure.

[0070] This conversion is caused by rotating the handle 26 forward about the first handle coupler 27 and the second handle coupler 28, causing the handle 26 to rotate about the handle axis 29 in a first direction (counterclockwise as shown in the figure). This causes the first drive coupler 31 and the second drive coupler 32 to pull backward on the second leg 6 and the fourth leg 8, and then rotate about the first rotation coupler 51 and the second rotation coupler 52 in the same first direction (counterclockwise as shown in the figure), thereby pulling the second leg 6 and the fourth leg 8 toward the first handle post 9 and the second handle post 10.

[0071] Therefore, the first drive coupling 30 and the second drive coupling cause the first panel 11 to rotate about the axis 20 and the hinge 13, increasing the angle between the first panel 11 and the second panel 12 to nearly 180 degrees. As a result, the first panel 11 and the second panel 12 together become flatter.

[0072] When the second leg 6 and the fourth leg 8 rotate about the first rotary coupler 51 and the second rotary coupler 52, the first additional drive linkage 35 and the second additional drive linkage 36 also couple the movement of the handle. The first additional drive linkage 35 and the second additional drive linkage 36 cause the first leg 5 and the third leg 7 to rotate about the first rotary coupler 51 and the second rotary coupler 52 in a first direction.

[0073] The first extension drive linkage 43 and the second extension drive linkage 44 couple the movement of the first leg 5 and the third leg 7 to the seat extension panel, such that the seat extension panel will rotate or hinge around the axis 20 in the same direction as the first leg 5 and the third leg 7.

[0074] Therefore, when the user rotates the handle 26 around the first handle coupling 27 and the second handle coupling 28, the linkage will:

[0075] • This causes the first panel 11 and the second panel 12 to become flatter together;

[0076] • This causes the second leg 6 and the fourth leg 8 to rotate toward the first handle support 9 and the second handle support 10;

[0077] • This causes the first leg 5 and the third leg 7 to rotate toward the first handle support 9 and the second handle support 10;

[0078] • This causes the seat extension panel 22 to rotate together with the first leg 5 and the third leg 7.

[0079] This sport can be seen in Figure 4 and Figure 5 as well as Figure 5 and Figure 6 Because the parts come from Figures 1 to 3The non-collapsed positions shown and discussed Figures 8 to 9 The folded position shown gradually moves. In the folded position, the cart occupies much less space and has folded into a roughly Z-shape. If they are not coplanar, the various parts of the cart have become roughly parallel:

[0080] • The top horizontal stroke forming the Z: handle 26

[0081] • Diagonal strokes forming the Z: First handle support 9 and second handle support 10, first panel 51 and second panel 52

[0082] • The bottom horizontal strokes forming the Z: legs 5, 6, 7, 8 and seat extension panel 22

[0083] Although the seat base 15 is formed by the first panel 11 and the seat extension panel 22 in an unfolded state, it can be seen that the two panels 11, 22 are hinged relative to each other around the axis 20 so as to fold downward into a compact form.

[0084] It can also be seen that the distance between the first point 40 and the second point 41 in the folded state is much smaller than the distance between the first point 40 and the second point 41 in the unfolded state. The elastic properties of the carrying strap 42 will allow the carrying strap 42 to extend when used to suspend the trolley 1, and provide the user with a certain degree of shock absorption when carrying the trolley 1.

Claims

1. A cart characterized by, comprising a chassis and a seat supported by the chassis, wherein the seat comprises a first panel and a second panel, the first and second panels each having a first end and a second end, the first and second panels being hingedly joined at their respective first ends by a hinge having a hinge axis so as to define an angle between the first and second panels about the hinge axis; wherein the chassis comprises a first leg, a second leg, a third leg, and a fourth leg, and a first handle post and a second handle post, wherein: the first and second legs and the first handle post are joined by a first rotational coupling such that the first and second legs and the first handle post are rotatable about a common axis; the third and fourth legs and the second handle post are joined by a second rotational coupling spaced apart from the first rotational coupling such that the third and fourth legs and the second handle post are rotatable about a common axis; wherein the seat comprises a shaft mounted at the second end of the first panel and connected between the first and second rotational couplings, the shaft being coaxial with the common axes, the second end of the first panel being pivotally coupled to the shaft such that the second end of the first panel is pivotable about the common axis; wherein the stroller is arranged to have: an uncollapsed position in which: the first panel forms at least a portion of a seat of the seat upon which a rider can sit, and the second panel forms at least a portion of a backrest of the seat; and the angle between the first and second panels is a first angle that is less than 180 degrees; and a collapsed position in which: a space occupied by the stroller is reduced relative to the uncollapsed position; and wherein the stroller is arranged to transition from the uncollapsed state to the collapsed state by rotating the second and fourth legs in a first direction about the first and second rotational couplings toward the first and second handle posts, the rotation of the second and fourth legs toward the first and second handle posts causing the first panel to pivot about the hinge in the first direction such that the angle between the first and second panels increases.

2. The cart of claim 1, wherein, In the collapsed state, the angle between the first and second panels will be a second angle that is closer to 180 degrees than the first angle, the second angle typically being 180 degrees.

3. The cart of claim 1, wherein, the stroller comprises at least one coupling linkage joining the first panel to at least one of the second and fourth legs.

4. The cart of claim 3, wherein, Each coupling linkage causes the first panel to rotate with the first and second handle posts.

5. The cart of claim 1, wherein, The chassis includes a handle including a U-shaped member having a first end and a second end, the first end of the U-shaped member being coupled to the first handle strut at an end of the first handle strut distal from the first rotational coupling, and the second end of the U-shaped member being coupled to the second handle strut at an end of the second handle strut distal from the second rotational coupling; wherein the handle is provided with a first handle coupling and a second handle coupling, wherein the handle is rotatably coupled to the first handle strut by the first handle coupling, and wherein the handle is rotatably coupled to the second handle strut by the second handle coupling, wherein the first handle coupling and the second handle coupling allow the handle to rotate about a common handle axis about the first handle coupling and the second handle coupling.

6. The cart of claim 5, wherein, The handle is provided with at least one drive coupling by which the handle couples at least one of the second leg and the fourth leg.

7. The cart of claim 6, wherein, Each drive coupling is arranged such that, when the handle is rotated in the first direction relative to the first handle strut and the second handle strut, the second leg and / or the fourth leg is driven to rotate in the first direction about the common axis.

8. The cart of claim 6, wherein, Each drive coupling includes a stub fixed to the handle and extending from the handle past the first handle coupling or the second handle coupling, and an arm connecting the stub to the second leg or the fourth leg.

9. The cart of claim 1, wherein, Each of the second leg and the fourth leg is provided with an additional drive linkage coupling the second leg to the first leg, and the fourth leg to the third leg, respectively.

10. The cart of claim 9, wherein, Each additional drive linkage is arranged such that, when the handle is rotated in the first direction relative to the first handle strut and the second handle strut, the first leg and / or the third leg is driven to rotate in the first direction about the common axis.

11. The cart of claim 9, wherein, Each additional drive linkage includes a stub rigidly coupled to the second leg or the fourth leg, and an arm rotatably coupled at a first end to the stub and at a second end to the first leg or the third leg.

12. The cart of claim 9, wherein, The seat is provided with a seat extension panel pivotally mounted on the shaft at a first end of the seat extension panel, and co-planar with the first panel in the un-retracted state.

13. The cart of claim 12, wherein, The seat extension panel is provided with at least one drive linkage, each drive linkage being coupled to each of the additional drive linkages or one of the additional drive linkages, and each drive linkage being arranged such that movement of the additional drive linkages caused by movement of the handle in the first direction relative to the handle struts causes the seat extension panel to rotate in the first direction about the shaft.

14. The cart of claim 1, wherein, The stroller is provided with a carry strap comprising a flexible elongate member having a first end and a second end, the first end of the flexible elongate member being connected to one of the first leg and the third leg at a first point and the second end of the flexible elongate member being connected to one of the second leg and the fourth leg at a second point.

15. A cart characterized by, comprising a chassis and a seat supported by the chassis, wherein the chassis comprises a first leg, a second leg, a third leg and a fourth leg and a first handle post and a second handle post, wherein: the first leg and the second leg and the first handle post are joined by a first rotational coupling such that the first leg and the second leg and the first handle post are rotatable about a common axis; the third leg and the fourth leg and the second handle post are joined by a second rotational coupling spaced apart from the first rotational coupling such that the third leg and the fourth leg and the second handle post are rotatable about a common axis; wherein the stroller is arranged to have an uncollapsed position and a collapsed position, wherein in the collapsed position the stroller occupies a reduced amount of space relative to the uncollapsed position; wherein the stroller is provided with a carry strap comprising a flexible elongate member having a first end and a second end, the first end of the flexible elongate member being connected to one of the first leg and the second leg at a first point and the second end of the flexible elongate member being connected to one of the third leg and the fourth leg at a second point.

16. The cart of claim 14 or claim 15, wherein, The length of the strap is approximately the same as the distance between the first point and the second point in the uncollapsed state.

17. The cart of claim 16, wherein, The distance between the first point and the second point in the collapsed state is less than the length.

18. The cart of claim 14 or claim 15, wherein, The strap is elastic.

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