baby carriage

Abstract

The stroller 10 comprises a stroller body 11. The stroller body 11 includes a body frame 12, a handle 30 attached to the body frame 12 so as to be swingable in the front-rear direction, and a seat support unit 40 held by the body frame 12. The seat support unit 40 includes a seat support 41. The position of the seat support 41 in the front-rear direction on the body frame 12 changes in response to the swinging of the handle 30.

Description

[Technical Field]

[0001] The present invention relates to a stroller. [Background technology]

[0002] Strollers used for taking babies and small children out are widely used. Strollers have a seat support unit that supports a seat on which the baby sits, a main frame that supports the seat support unit, and a handle attached to the main frame. By operating the handle, the operator of the stroller (parent, etc.) can adjust the direction of travel of the stroller and change the inclination of the stroller to overcome steps. JP2018-202982A discloses a stroller in which the position of the handle can be switched between a back-pushing position and a front-pushing position.

[0003] In strollers where the handle position can be switched between a rear-pushing position and a forward-pushing position, the distance between the grip of the handle and the center of gravity of the baby in the stroller generally differs when the handle is in the rear-pushing position and when it is in the forward-pushing position. This results in different operability of the stroller when the handle is in the rear-pushing position and when it is in the forward-pushing position, and in one case it can be difficult to operate the stroller. DISCLOSURE OF THE INVENTION

[0004] The present invention has been made in consideration of the above points, and has as its object to suppress changes in the operability of a stroller when the handle position is changed.

[0005] The stroller according to this embodiment is A stroller comprising a stroller body, The stroller body is The body frame and a handle attached to the main body frame so as to be swingable in the front-rear direction; a seat support unit held by the main body frame; Including, the seat support unit includes a seat support; The position of the seat support in the front-rear direction on the main body frame changes in accordance with the swinging of the handle.

[0006] According to the present invention, it is possible to suppress changes in the operability of the stroller when the handle position is changed. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram for explaining an embodiment of the present invention, and is a perspective view for explaining the overall configuration of a stroller. [Figure 2] FIG. 2 is a side view showing the stroller of FIG. 1 with the handle positioned in the back pushing position. [Figure 3] FIG. 3 is a side view showing the stroller of FIG. 1 with the handle in the facing-pushing position. [Figure 4] FIG. 4 is a side view showing the stroller of FIG. 1 in a folded state. [Figure 5] FIG. 5 is a perspective view showing the seat support unit together with the handle and the third link member. [Figure 6] FIG. 6 is a perspective view of the right half of the stroller as seen from the inside and rear. [Figure 7] FIG. 7 is a view of the right half of the stroller as seen from the inside, showing the state in which the handle is positioned in the back pushing position. [Figure 8] FIG. 8 is a view corresponding to FIG. 7, showing the state in which the handle is disposed at the facing-pushing position. [Figure 9] FIG. 9 is a diagram showing a modified example of the stroller, and is a perspective view of the right half of the stroller as seen from the inside. [Figure 10] FIG. 10 corresponds to FIG. 9 and shows the state in which the handle is disposed at the facing-pushing position. [Figure 11] FIG. 11 is a view showing another modified example of the stroller, and is a perspective view of the left half of the stroller as seen from the outside and front. [Figure 12]FIG. 12 shows yet another modified example of the stroller, and is a perspective view of the left half of the stroller as seen from the outside and front. [Figure 13] FIG. 13 shows yet another modified example of the stroller, and is a perspective view of the right half of the stroller as seen from the inside. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will now be described with reference to a specific example shown in the drawings.

[0009] 1 to 8 are diagrams for explaining an embodiment of a stroller according to the present invention, of which Fig. 1 to Fig. 4 show the overall structure of one specific example of the stroller.

[0010] The stroller 10 of this embodiment includes a stroller body 11. As shown in Figure 1, the stroller body 11 shown in the figure has a configuration that is generally symmetrical overall about planes along the front-to-rear and up-to-down directions. The stroller body 11 has a body frame 12 having front legs 14 and rear legs 16, a handle 30 attached to the body frame 12, and a seat support unit 40 supported by the body frame 12.

[0011] The handle 30 can swing back and forth relative to the main frame 12. The position of the handle 30 can be changed between a rear-pushing position shown in FIG. 2 and a forward-pushing position shown in FIG. 3. When the handle 30 is positioned in the rear-pushing position, the operator (guardian) grips the handle 30 from behind the baby to steer the stroller 10. At this time, the front legs 14 side of the stroller 10 is forward in the direction of travel. When the handle 30 is positioned in the forward-pushing position, the operator grips the handle 30 from the side facing the baby to steer the stroller 10. At this time, the rear legs 16 side of the stroller 10 is forward in the direction of travel.

[0012] The seat support unit 40 supports a cushion seat on which an infant riding in the stroller 10 sits. The seat support unit 40 includes a seat support 41 that supports the buttocks of an infant seated in the stroller body 11 from below.

[0013] The stroller 10 of this embodiment is devised to suppress changes in operability of the stroller 10 when the position of the handle 30 is changed. Specifically, the position of the seat support 41 in the front-to-rear direction on the main frame 12 changes in accordance with the swing of the handle 30. This prevents changes in operability of the stroller 10 caused by changes in the distance between the gripping portion of the handle 30 (a middle portion 33 described below) and the center of gravity of the baby on the seat support 41 when the handle 30 is switched.

[0014] In this specification, the terms "front," "rear," "up," "down," "front-to-back direction," and "vertical direction" used with respect to a stroller and its components refer to the "front," "rear," "up," "down," "front-to-back direction," and "vertical direction" relative to an infant riding in the stroller and its components in an unfolded state, unless otherwise specified. More specifically, the "front-to-back direction" refers to the direction connecting the lower left and upper right of the page in FIG. 1, which corresponds to the left-to-right direction of the page in FIGS. 2 and 3. Unless otherwise specified, "front" refers to the side facing an infant riding in the stroller, with the lower left side of the page in FIG. 1 and the left side of the page in FIGS. 2 and 3 being the front side. Meanwhile, the "vertical direction" refers to the direction perpendicular to the running surface of the stroller. Therefore, when the running surface is horizontal, the "vertical direction" refers to the vertical direction. Furthermore, the "lateral direction" refers to the width direction, which is perpendicular to both the "front-to-back direction" and the "vertical direction." Furthermore, the "rear side" refers to the side opposite the side facing an infant riding in the stroller 10. Therefore, the "rear side" usually means the rear side.

[0015] In this specification, the inner side in the width direction refers to the side closer to the center of the stroller body 11 in the width direction, while the outer side in the width direction refers to the side farther away from the center of the stroller body 11 in the width direction.

[0016] 1 to 8, the stroller body 11 further includes an interlocking member 60. The interlocking member 60 moves the seat support 41 of the seat support unit 40 in conjunction with the handle 30. In addition, in the embodiment shown in FIGS. 1 to 8, the stroller body 11 is foldable. Each element constituting the stroller body 11 will be described in further detail below.

[0017] (Main frame) As shown in FIG. 1, the main body frame 12 has a pair of front legs 14 arranged on the left and right, and a pair of rear legs 16 arranged on the left and right. The main body frame 12 further has a first link member L1, a second link member L2, a third link member L3, and a fourth link member L4 arranged on the left and right, respectively. The front legs 14, the rear legs 16, and the first to fourth link members L1 to L4 function as link members that make the main body frame 12 foldable and unfoldable. In the illustrated example, the first link member L1 also functions as an armrest. That is, the armrest constitutes the first link member L1.

[0018] Front wheels 18 and rear wheels 19 are rotatably mounted on the lower ends of the front legs 14 and rear legs 16, respectively. The front wheels 18 and rear wheels 19 are held by front wheel holding members 18a and rear wheel holding members 19a connected to the lower ends of the front wheels 18 and rear wheels 19, respectively. The front wheel holding members 18a and the front wheels 18 form casters, and the front wheels 18 are rotatable around front wheel rotation shafts 18b extending horizontally and swivel around front wheel pivot shafts 18c extending vertically. The rear wheel holding members 19a and the rear wheels 19 also form casters, and the rear wheels 19 are rotatable around rear wheel rotation shafts 19b extending horizontally and swivel around rear wheel pivot shafts 19c extending vertically.

[0019] As shown in FIG. 2, the upper end portions of the front legs 14 are rotatably (swingably) connected to the front portion of the first link member L1 arranged on the corresponding side (left or right). The upper end portions of the rear legs 16 are rotatably (swingably) connected to the front portion of the first link member L1 arranged on the corresponding side (left or right). Also, as shown in FIG. 1, the upper portion of the second link member L2 is rotatably (swingably) connected to the rear portion of the first link member L1 arranged on the corresponding side (left or right). The second link member L2 is supported by the rear legs 16 when the main body frame 12 is unfolded.

[0020] The third link member L3 is provided between the front leg 14 and the second link member L2. The front portion of the third link member L3 is connected to the middle portion of the front leg 14. The third link member L3 is rotatable relative to the front leg 14 around a rotation axis extending in the width direction. Furthermore, the rear portion of the third link member L3 is connected to a lower portion of the second link member L2. The third link member L3 is rotatable relative to the second link member L2 around the rotation axis extending in the width direction.

[0021] 2 and 3, the third link member L3 is connected to the second link member L2 via a shaft member 20 that extends in the width direction. The third link member L3 is also connected to the front legs 14 via a shaft member (not shown) that extends in the width direction. Therefore, the pair of third link members L3 rotate synchronously with each other relative to the front legs 14 and the second link member L2. In the illustrated example, the third link member L3 extends generally linearly in the front-to-rear direction when the stroller 10 is in the unfolded state.

[0022] As shown in FIG. 1 , in the illustrated example, the fourth link member L4 is rotatably connected to the rear leg 16. A lower portion of the fourth link member L4 is rotatably connected to a middle portion of the rear leg 16. The fourth link member L4 is rotatably connected to the second link member L2 and the third link member L3. In the illustrated example, the second link member L2, the third link member L3, and the fourth link member L4 are rotatably connected to one another using the same shaft member 20. This shaft member 20 penetrates the second link member L2, the fourth link member L4, and the third link member L3. With this configuration, the second link member L2, the third link member L3, and the fourth link member L4 can rotate relative to one another about an axis that coincides with the central axis of the shaft member 20.

[0023] As shown in FIG. 1, the main frame 12 has, as laterally extending components, a front connector 15 that connects the pair of front legs 14 and a rear connector 17 that connects the pair of rear legs 16. The front connector 15 functions as a footrest. A central connector 21 is provided between the pair of third link members L3. The front connector 15, rear connector 17, and central connector 21 can suppress lateral deformation of the stroller 10.

[0024] (handle) As described above, the handle 30 can swing back and forth relative to the main body frame 12. The handle 30 can swing between a rear-pushing position (see FIG. 2) and a front-pushing position (see FIG. 3). In the illustrated example, the handle 30 is inclined relative to the vertical and extends upward backward in the rear-pushing position. In the front-pushing position, the handle 30 is inclined relative to the vertical and extends upward forward.

[0025] In the illustrated example, the handle 30 has a handle body 31 swingably attached to the body frame 12 and a holder 35 provided on the handle body 31 .

[0026] As shown in FIG. 1, the handle body 31 has a generally U-shape overall. The handle body 31 is rotatably (swingably) connected to the main body frame 12 at both ends of the U-shape. The handle body 31 includes a pair of handle extensions 32 extending generally parallel to each other, and an intermediate portion 33 connecting the pair of handle extensions 32. The pair of handle extensions 32 are disposed on the outer sides of the main body frame 12 in the width direction. Each handle extension 32 is rotatably connected to the main body frame 12 at its lower end. The intermediate portion 33 is a grip portion that is gripped by the operator (guardian).

[0027] In the illustrated example, the handle body 31 is rotatably connected to the main body frame 12 using the shaft member 20. That is, the second link member L2, the third link member L3, the fourth link member L4, and the handle 30 are rotatable relative to one another about the same axis defined by the shaft member 20. A retainer 35 provided on the handle 30 engages with a first retainer 36 (see FIG. 3) of the main body frame 12, thereby maintaining the handle 30 in the back-pushing position shown in FIG. 2. A retainer 35 provided on the handle 30 engages with a second retainer 37 (see FIG. 2) of the main body frame 12, thereby maintaining the handle 30 in the face-to-face pushing position shown in FIG. 3.

[0028] The stroller body 11 configured as described above can be folded by rotating each component relative to the other. Specifically, the second link member L2 is first pulled upward and rearward using the handle 30 positioned in the rear pushing position, and then pushed downward, thereby rotating the fourth link member L4 clockwise in FIG. 2 relative to the rear legs 16. This operation causes the first link member L1 and the third link member L3 to rotate clockwise in FIG. 2 relative to the second link member L2. This operation moves the second link member L2 and the front legs 14 closer to each other while maintaining a substantially parallel arrangement in a side view, and also lowers the position of the handle 30 relative to the main body frame 12. In this manner, the stroller body 11 can be folded as shown in FIG. 4. In the folded state shown in FIG. 4, the stroller 10 can be reduced in size in the front-to-rear and up-to-down directions. To unfold the stroller body 11 from the folded state, the above-described folding procedure can be reversed.

[0029] The stroller body 11 has a state maintaining mechanism (not shown) that restricts the relative rotation of the two components. By operating this state maintaining mechanism, the stroller body 11 can be folded. In the example shown, the handle 30 has a remote control device 38 connected to the state maintaining mechanism. As shown in FIG. 1, the remote control device 38 is provided on the middle part 33 of the handle body 31. By operating the remote control device 38, the state maintaining mechanism is activated, and the stroller body 11 can be folded.

[0030] (Seat support unit) The seat support unit 40 supports a cushion seat (not shown) on which an infant sits. FIG. 5 is a perspective view showing the seat support unit 40 together with the handle 30, the third link member L3, and the interlocking member 60. In FIG. 5, a portion of the guard material 55 has been cut away for clarity. As shown in FIG. 5, the seat support unit 40 includes a seat support 41 and a back support 45. The seat support 41 faces the buttocks of an infant riding in the stroller 10. The back support 45 faces the back of the infant. As shown in FIG. 1, the seat support unit 40 is disposed inside the main frame 12 in the width direction. More specifically, the seat support unit 40 is disposed between the left and right front legs 14 and rear legs 16.

[0031] As shown in FIG. 5 , the seat support 41 has a front frame member 42. The front frame member 42 is a frame member formed in a generally U-shape. The front frame member 42 has a pair of side portions 43 extending in the front-rear direction and a front end portion 44 extending in the width direction and connecting the front ends of the pair of side portions 43. The seat support 41 includes a fabric (not shown) stretched across the front frame member 42 and defining the seat surface. Alternatively, the seat support 41 includes a seat panel (not shown) supported from below by the front frame member 42 and defining the seat surface. The seat panel is a plate-like member made of resin or metal. Note that if the seat support 41 includes a seat panel, the seat support 41 does not necessarily have to include the front frame member 42.

[0032] As will be described later, the seat support 41 is held by the third link member L3 via the interlocking member 60. This allows the seat support 41 to rotate in conjunction with the rotation of the third link member L3 when folding the stroller body 11. When folding the stroller body 11, the angle of the seat support 41 relative to the second link member L2 can be automatically reduced, allowing the front-to-rear dimension of the stroller 10 in the folded state to be reduced. In other words, when viewed from the side of the stroller 10 in the folded state, the seat support 41 can be prevented from protruding forward of the main body frame 12.

[0033] The back support 45 has a rear frame member 46. The rear frame member 46 is a frame member formed in a substantially U-shape. The rear frame member 46 has a pair of side portions 47 extending in the front-rear and / or up-down directions, and a rear end portion 48 extending in the width direction and connecting the rear ends of the pair of side portions 47. In the illustrated example, the back support 45 is connected to the seat support 41. More specifically, the rear frame member 46 extends upward and rearward from the rear end of the front frame member 42. The back support 45 is rotatable relative to the seat support 41 about a rotation axis X40 extending in the width direction. More specifically, the front end of the rear frame member 46 is connected to the rear end of the front frame member 42 so as to be rotatable about the rotation axis X40 extending in the width direction. By rotating the back support 45 relative to the seat support 41, the back support 45 can be reclined relative to the seat support 41. The back support 45 may further include a fabric or plate-like material supported by the rear frame member 46 .

[0034] The back support 45 is supported from behind by a reclining belt 49, both ends of which are connected to the main frame 12. This prevents the back support 45 from falling backward. The length of the reclining belt 49 is adjustable. By adjusting the length of the reclining belt 49, the back support 45 can be reclined. The reclining belt 49 is shown only in Figures 2 and 3. The reclining belt 49 is not shown in the other figures.

[0035] In the illustrated example, both ends of the reclining belt 49 are connected to the first link member L1. The reclining belt 49 is disposed at its center on the back side of the back support 45 and is connected at both ends to the first link member L1. This allows the back support 45 to rotate relative to the second link member L2 as the first link member L1 rotates when the main frame 12 is folded. When the stroller 10 is folded, the angle of the back support 45 relative to the second link member L2 can be automatically reduced, thereby reducing the longitudinal dimension of the stroller 10 in the folded state. In other words, when the stroller 10 is viewed from the side in the folded state, the back support 45 can be prevented from protruding rearward beyond the second link member L2.

[0036] 5, the seat support unit 40 further includes a pair of side support portions 50 and side frame members 51 extending in the vertical direction. The side support portions 50 are located above the side portions 47 of the back support 45. In the illustrated example, the lower ends of the side support portions 50 are fixed to the seat support 41 via interlocking members 60, which will be described later.

[0037] The side frame members 51 are frame members formed in a substantially U-shape. The side frame members 51 are connected at both ends of the U to the upper ends of the side support parts 50. The side frame members 51 are connected to the side support parts 50 so as to be rotatable about a rotation axis parallel to the width direction.

[0038] A pair of connecting frame members 52 is provided between the side frame members 51 and the rear frame member 46. The pair of connecting frame members 52 are arranged spaced apart from each other in the width direction. The connecting frame members 52 are rotatable relative to the rear frame member 46 and the side frame member 51. The connecting frame member 52 functions as a link member, and causes one of the rear frame member 46 and the side frame member 51 to swing in conjunction with the swinging of the other. The connecting frame member 52 also forms a wall portion between the rear portion of the rear frame member 46 and the rear portion of the side frame member 51 that is located behind the baby's head when the back support member 45 is lying down, and also forms a wall portion that is located behind the baby's head when the back support member 45 is upright.

[0039] The seat support unit 40 also has a pair of guard supports 54 connected to the left and right side portions of the seat support 41, and a guard material 55 extending between the pair of guard supports 54. The left and right ends of the guard material 55 are detachably connected to the left and right guard supports 54, respectively. The seat support unit 40 also has a canopy support 57 that supports a canopy cloth (not shown). The canopy support 57 includes a pair of canopy support members 58 fixed to both ends of the side frame member 51, respectively, and canopy ribs 59 extending between the pair of canopy support members 58. The canopy cloth is attached to the canopy ribs 59 to form the canopy. The canopy covers an infant seated on the seat support unit 40 from above, providing the infant with a sunshade environment.

[0040] (Interlocking parts) As shown in FIG. 6, the interlocking member 60 is connected to the seat support 41 and the handle 30 and transmits the swinging of the handle 30 to the seat support 41. FIG. 6 is a view showing a portion of the right half of the stroller body 11 shown in FIG. 2 from the inside and rear. The interlocking member 60 causes the seat support 41 to move in conjunction with the swinging of the handle 30. More specifically, as can be understood by comparing FIGS. 2 and 3 or FIGS. 7 and 8, the interlocking member 60 causes the front-to-rear position of the seat support 41 on the body frame 12 to change in accordance with the swinging of the handle 30. FIG. 7 is a view showing a portion of the right half of the stroller body 11 shown in FIG. 2 from the inside in the width direction. FIG. 8 is a view showing a portion of the right half of the stroller body shown in FIG. 3 from the inside in the width direction. In FIG. 7, the front end portion 44 of the seat support 41 when the handle 30 is in the facing-pushing position is indicated by a dashed line.

[0041] 2 and 7, when the handle 30 is placed in the back-pushing position, the seat support 41 is located in a first position. Also, when the handle 30 is placed in the face-to-face pushing position, as shown in Figures 3 and 8, the seat support 41 is located in a second position that is further forward than the first position. In the illustrated example, the interlocking member 60 further connects the seat support 41 to the main frame 12.

[0042] In the illustrated example, the interlocking member 60 includes a first interlocking element 61 and a second interlocking element 70. The interlocking member 60 is configured to convert rotational movement of the handle 30 into linear movement of the seat support 41. The first interlocking element 61 is attached to the handle 30. The second interlocking element 70 holds the seat support 41 on the main frame 12. The second interlocking element 70 is connected to the first interlocking element 61. In the illustrated example, the second interlocking element 70 is attached to the third link member L3 so as to be slidable in the front-to-rear direction.

[0043] The first interlocking element 61 rotates about an axis extending in the width direction as the handle 30 swings. The first interlocking element 61 is fixed to the lower end of the handle extension portion 32. In the illustrated example, the first interlocking element 61 is rotatably connected to the main body frame 12 using the shaft member 20. When the handle 30 swings about the shaft member 20, the first interlocking element 61 swings together with the handle 30 about the shaft member 20. When the handle 30 swings forward (from the back-pushing position toward the front-pushing position), the first interlocking element 61 swings in a first swing direction (counterclockwise in FIGS. 7 and 8). When the handle 30 swings backward (from the front-pushing position toward the back-pushing position), the first interlocking element 61 swings in a second swing direction (clockwise in FIGS. 7 and 8) opposite to the first swing direction.

[0044] As clearly shown in FIG. 6 , the first interlocking element 61 includes a first rotating element 62, a second rotating element 65, and a connecting element 69. The first rotating element 62 is fixed to the lower end of the handle extension portion 32 on the widthwise outer side of the main body frame 12. The first rotating element 62 is connected to the handle 30 using a shaft member 20. The second rotating element 65 is disposed on the widthwise inner side of the main body frame 12. The second rotating element 65 is connected to the main body frame 12 using the shaft member 20. The connecting element 69 is disposed between the first rotating element 62 and the second rotating element 65. The connecting element 69 extends in the widthwise direction and is fixed at both ends to the first rotating element 62 and the second rotating element 65. The connecting element 69 transmits the rotation of the first rotating element 62 to the second rotating element 65.

[0045] In the illustrated example, the first rotating element 62 has a base 63 that connects to the handle 30, and a rearward extending portion 64 that extends rearward or downward from the base 63. A recess is formed in the base 63 to receive the lower end of the handle extending portion 32. The shaft member 20 passes through the base 63.

[0046] In the illustrated example, the second rotating element 65 has a base 66 through which the shaft member 20 passes, an upward extending portion 67 extending upward from the base 66, and a rearward extending portion 68 extending rearward or downward from the base 66. The upward extending portion 67 is connected to the second interlocking element 70. Specifically, the upper end of the upward extending portion 67 is formed with a pair of wall portions 67a spaced apart from each other in the width direction, and a shaft portion 67b extending in the width direction between the pair of wall portions 67a. The pair of wall portions 67a receive the second interlocking element 70 therebetween.

[0047] The connecting element 69 connects the first pivoting element 62 and the second pivoting element 65 at the rear of the main body frame 12. One end of the connecting element 69 is connected to the rearward extending portion 64 of the first pivoting element 62. The other end of the connecting element 69 is connected to the rearward extending portion 68 of the second pivoting element 65. As shown in FIG. 6 , the first interlocking element 61 extends from the outer side in the width direction of the main body frame 12, passing behind the rear legs 16, to the inner side in the width direction of the main body frame 12. This reduces the risk that the interlocking member 60 will interfere with the components of the main body frame 12 and hinder the folding or unfolding operation of the stroller main body 11.

[0048] As clearly shown in FIGS. 7 and 8 , the second interlocking element 70 is disposed between the seat support body 41 and the first interlocking element 61. The second interlocking element 70 includes a base 71 fixed to the rear end of the seat support body 41, a downward extension 72 extending downward from the base 71, and a rearward extension 73 extending rearward from the base 71. The lower end of the downward extension 72 is formed with an annular portion 72a through which the third link member L3 is inserted. The downward extension 72 is connected to the third link member L3 so as to be slidable in the front-rear direction. Therefore, the second interlocking element 70 is guided by the third link member L3 and is movable in the front-rear direction. In other words, the third link member L3 functions as a rail member that guides the movement of the second interlocking element 70 in the front-rear direction. The rear end of the rearward extension 73 is connected to the first interlocking element 61. More specifically, a shaft insertion hole 73a is formed in the rear end of the rearward extension 73. The shaft insertion hole 73a is an elongated hole extending in the vertical direction. The rear end of the rearward extending portion 73 extends between the pair of wall portions 67a of the second rotating element 65. The shaft portion 67b of the second rotating element 65 is inserted into the shaft insertion hole 73a of the rearward extending portion 73. The shaft portion 67b is rotatable and movable in the vertical direction within the elongated shaft insertion hole 73a.

[0049] In the illustrated example, the side support parts 50 are connected to the rearward extending parts 73. Therefore, the side support parts 50 are indirectly connected to the seat support parts 41 via the second interlocking elements 70. In addition, the hood support material 58 is indirectly connected to the seat support parts 41 via the side support parts 50 and the second interlocking elements 70.

[0050] In the illustrated example, the interlocking member 60 further includes a third interlocking element 75. The third interlocking element 75 is disposed in front of the second interlocking element 70. The third interlocking element 75 connects the seat support body 41 and the third link member L3. The third interlocking element 75 includes a base 76 fixed to the side portion 43 of the front frame member 42 of the seat support body 41 and a downward extension 77 extending downward from the base 76. The lower end of the downward extension 77 is formed with an annular portion 77a through which the third link member L3 is inserted. The downward extension 77 is connected to the third link member L3 so as to be slidable in the front-rear direction. Therefore, the third interlocking element 75 is guided by the third link member L3 and can move in the front-rear direction. In other words, the third link member L3 also functions as a rail member that guides the movement of the third interlocking element 75 in the front-rear direction. Because the third interlocking element 75 is fixed to the seat support 41, the movement of the second interlocking element 70 is transmitted to the third interlocking element 75 via the seat support 41. Therefore, when the second interlocking element 70 moves relative to the main frame 12, the third interlocking element 75 moves together with the seat support 41 relative to the main frame 12. In the illustrated example, the guard support 54 is connected to a base 76 of the third interlocking element 75.

[0051] The stroller body 11 having the above configuration can automatically change the front-to-rear position of the seat support 41 on the body frame 12 by swinging the handle 30. Specifically, when the handle 30 is swung forward, the first interlocking element 61 rotates in a first rotation direction, and the upward extension 67 of the second pivoting element 65 swings forward. Accordingly, the shaft 67b moves up and down within the elongated shaft insertion hole 73a, pushing the second interlocking element 70 forward. The second interlocking element 70 moves forward together with the seat support 41 and the third interlocking element 75. Furthermore, when the handle 30 is swung backward, the first interlocking element 61 rotates in a second rotation direction, and the upward extension 67 of the second pivoting element 65 swings backward. Accordingly, the shaft 67b moves up and down within the shaft insertion hole 73a, pulling the second interlocking element 70 backward. As a result, the second interlocking element 70 moves rearward together with the seat support body 41 and the third interlocking element 75. When the seat support body 41 moves in the front-to-rear direction relative to the main frame 12, the second interlocking element 70 and the third interlocking element 75 slide on the third link member L3 while supporting the seat support body 41. As a result, the seat support body 41 moves stably in the front-to-rear direction on the main frame 12.

[0052] In this way, the front-to-rear position of the seat support 41 on the main frame 12 changes in response to the swinging of the handle 30, which also changes the front-to-rear position of the center of gravity of the baby supported by the seat support 41. This limits the change in the front-to-rear distance between the gripping portion (middle portion 33) of the handle 30 and the center of gravity of the baby when the position of the handle 30 is changed, thereby limiting changes in the operability of the stroller 10.

[0053] As described above, in the illustrated example, the back support 45, the guard material 55, and the canopy support 57 are connected to the seat support 41. Therefore, when the handle 30 is swung forward or backward, the positions of the back support 45, the guard material 55, and the canopy support 57 relative to the main frame 12 automatically change. In other words, when the handle 30 is swung forward, the back support 45, the guard material 55, and the canopy support 57 move forward together with the seat support 41. On the other hand, when the handle 30 is swung backward, the back support 45, the guard material 55, and the canopy support 57 move backward together with the seat support 41. Therefore, even if the position of the seat support 41 relative to the main frame 12 changes in the forward or backward direction, the positional relationship between the seat support 41 and the back support 45, the guard material 55, and the canopy support 57 is maintained. Therefore, movement of the seat support 41 relative to the main frame 12 does not change the dimensions of the living space of the seat support unit 40, nor does it change the positions of the guard material 55 and the canopy relative to the baby on the seat support 41. This prevents changes in the ride comfort of the stroller before and after changing the fore-and-aft position of the seat support 41. Even when the fore-and-aft position of the seat support 41 is changed, an appropriate sunshade environment can be provided. Furthermore, because the fore-and-aft positions of the back support 45, guard material 55, and canopy support 57 on the main frame 12 change in response to the swinging of the handle 30, changes in the fore-and-aft distance between the grip portion (middle portion 33) of the handle 30 and the center of gravity of the seat support unit 40 are prevented, which further effectively prevents changes in the operability of the stroller 10.

[0054] In the illustrated example, the seat support 41 is supported from below by the second interlocking element 70 and the third interlocking element 75 attached to the main body frame 12. In other words, the seat support 41 is positioned higher than the connection portion (the third link member L3 in the illustrated example) between the main body frame 12 and the second interlocking element 70 and the third interlocking element 75. This allows the height position of the seat support 41 to be higher relative to the main body frame 12. By raising the height position of the seat support 41, the operator of the stroller 10 can easily look after a baby in the stroller 10.

[0055] The amount of change in the front-to-rear position of the seat support 41 relative to the main frame 12 can be adjusted by adjusting the length D1 (see FIG. 7) of the upward extension 67 of the second pivoting element 65 (more specifically, the distance between the shaft member 20 and the shaft 67b). In the example shown, the length D1 of the second pivoting element 65 is determined so that the connection portion (rotation axis X40 in the example shown) between the second interlocking element 70 and the seat support 41 is located behind the rear legs 16 when the handle 30 is positioned in the back-to-back pushing position, and is located in front of the rear legs 16 when the handle 30 is positioned in the forward-to-back pushing position. This effectively prevents change in the front-to-rear distance between the position of the center of gravity of the baby on the stroller 10 and the grip portion 33 of the handle 30 when the position of the handle 30 is changed, and effectively prevents changes in the operability of the stroller 10.

[0056] Furthermore, in the illustrated example, the length D1 of the second rotating element 65 is determined so that the distance D2 in the front-to-rear direction between the first position and the second position of the seat support 41 (for example, the distance moved in the front-to-rear direction by the front end portion 44 of the seat support 41 when the handle 30 is switched from the back-pushing position to the face-to-face pushing position) is at least one-fourth of the distance D3 in the front-to-rear direction between the front legs 14 and the rear legs 16 at the height position of the seat support 41 in the first position. This effectively prevents changes in the distance in the front-to-rear direction between the position of the center of gravity of the baby on the stroller 10 and the grip portion 33 of the handle 30 when the position of the handle 30 is switched, and effectively prevents changes in the operability of the stroller 10.

[0057] Furthermore, in the illustrated example, the length D1 of the second pivoting element 65 is determined as follows: In other words, the length D1 is determined so that, in a side view of the stroller body 11, when the seat support 41 is disposed in the second position, the connection portion (the pivot axis X40 in the illustrated example) of the seat support 41 and the back support 45 is at least one-fourth of the front-to-rear distance D4 (see FIG. 3) between the connection portion of the rear leg 16 and the rear wheel holding member 19a and the connection portion of the front leg 14 and the front wheel holding member 18a, and is located further forward than the connection portion of the rear leg 16 and the rear wheel holding member 19a (in other words, when the handle 30 is disposed in the facing-pushing position, the front-to-rear distance D5 (see FIG. 3) between the pivot axis X40 and the connection portion of the rear leg 16 and the rear wheel holding member 19a is at least one-fourth of the distance D4). This more effectively prevents changes in the front-to-back distance between the center of gravity of the baby on the stroller 10 and the grip portion 33 of the handle 30 when the position of the handle 30 is changed, and more effectively prevents changes in the operability of the stroller 10.

[0058] In the illustrated example, the length D1 of the second rotating element 65 is determined as follows. That is, the length D1 is determined so that the longitudinal distance D2 (see FIG. 7) between the first position and the second position is at least twice the horizontal distance D6 (see FIG. 3) between the front wheel pivot shaft 18c and the front wheel pivot shaft 18b in a plane perpendicular to the front wheel pivot shaft 18b. When the front wheel holding member 18a pivots around the front wheel pivot shaft 18c, the position of the front wheel pivot shaft 18b relative to the front wheel pivot shaft 18c changes depending on whether the stroller 10 is operated with the handle 30 in the rear-to-rear pushing position or the stroller 10 with the handle 30 in the forward-to-rear pushing position, as shown in FIGS. 2 and 3. In the illustrated example, when the stroller 10 is operated with the handle 30 in the rear-to-rear pushing position, the front wheel pivot shaft 18b is located behind the front wheel pivot shaft 18c. In contrast, when the stroller 10 is operated with the handle 30 in the forward-pushing position, the front wheel rotation shaft 18b is located in front of the front wheel swivel shaft 18c. When operating the stroller 10 with the handle 30 in the forward-pushing position, the operator of the stroller 10 operates the stroller 10 using the front wheel rotation shaft 18b as a fulcrum. In such a stroller with swivelable front wheels 18, if the front-to-rear position of the seat support 41 does not change as the handle 30 swings, the front-to-rear distance between the front wheel rotation shaft 18b and the seat support 41 when the stroller is operated with the handle 30 in the forward-to-rear pushing position is twice the distance D6. Therefore, in the illustrated example, the distance D2 in the front-to-rear direction between the first position and the second position of the seat support 41 is set to at least twice the distance D6, thereby canceling out the change in the distance in the front-to-rear direction between the front wheel rotation shaft 18b and the seat support 41 caused by turning of the front wheel 18. This makes it possible to suppress changes in the operability of the stroller 10 caused by turning of the front wheel 18.

[0059] Furthermore, when the stroller body 11 having the above configuration is folded, the seat support 41 moves forward relative to the body frame 12. In the illustrated example, when the stroller body 11 is folded, the handle 30 swings relative to the third link member L3, and the first interlocking element 61 rotates relative to the third link member L3. This pushes the second interlocking element 70, along with the seat support 41 and the third interlocking element 75, toward the front end of the third link member L3. As a result, the seat support 41 moves forward relative to the body frame 12. When the stroller body 11 is folded, the seat support 41 moves forward relative to the body frame 12, which shifts the center of gravity of the stroller body 11 forward. This reduces the risk of the stroller body 11 tipping backward in the folded state. In other words, the stroller body 11 can be stably stood up in the folded state.

[0060] In the above example, the first interlocking element 61 has the shaft 67b and the second interlocking element 70 has the shaft insertion hole 73a, but this is not limited to this. The first interlocking element 61 may have an elongated hole corresponding to the shaft insertion hole 73a, and the second interlocking element 70 may have an axle corresponding to the shaft 67b. Furthermore, the handle 30 is connected to the second interlocking element 70 via the first interlocking element 61, but this is not limited to this. The handle 30 may be directly connected to the second interlocking element 70. In other words, the interlocking member 60 does not have to include the first interlocking element 61. In this case, the handle 30 may have a protrusion corresponding to the shaft 67b. Alternatively, the second interlocking element 70 may have a protrusion corresponding to the shaft 67b, and the handle 30 may have an elongated hole corresponding to the shaft insertion hole 73a. Furthermore, the handle 30 may be directly connected to the seat support 40. In other words, the stroller body 11 does not have to include the interlocking member 60. In this case, a protrusion corresponding to the shaft 67b may be formed on one of the handle 30 and the seat support 40, and an elongated hole corresponding to the shaft insertion hole 73a may be formed on the other of the handle 30 and the seat support 40.

[0061] <<Modifications>> Next, various modifications of this embodiment will be described with reference to Figures 9 to 13. In Figures 9 to 13, the same parts as those in the embodiment shown in Figures 1 to 8 are given the same reference numerals, and detailed description thereof will be omitted.

[0062] <Variation 1> The interlocking member 60 may be configured to swing the seat support 41 in the front-to-rear direction in accordance with the front-to-rear swing of the handle 30. In other words, the interlocking member 60 does not have to be configured to convert the rotational movement of the handle 30 into the linear movement of the seat support 41 in the front-to-rear direction.

[0063] In the example shown in FIGS. 9 and 10 , the shaft insertion hole 73a at the rear end of the second interlocking element 70 of the interlocking member 60 is a round hole, and the shaft portion 67b of the first interlocking element 61 cannot move up and down relative to the first interlocking element 61. Therefore, the second interlocking element 70 swings in conjunction with the swing of the first interlocking element 61. Also, in the example shown in FIGS. 9 and 10 , the third interlocking element 75 is a link member. The third interlocking element 75 is pivotally connected to the main frame 12 and the seat support body 41. In the illustrated example, the third interlocking element 75 is pivotally connected at its lower end to the third link member L3 about a pivot axis extending in the width direction. Also, the third interlocking element 75 is pivotally connected at its upper end to the side portion 43 of the seat support body 41 about a pivot axis extending in the width direction. The swing of the second interlocking element 70 is transmitted to the third interlocking element 75 via the seat support body 41. Therefore, the third interlocking element 75 swings in conjunction with the swing of the second interlocking element 70. In other words, the second interlocking element 70 and the third interlocking element 75 swing in conjunction with the swing of the handlebars 30. As a result, the seat support body 41 swings in the front-to-rear direction in conjunction with the swing of the handlebars 30.

[0064] In the examples shown in FIGS. 9 and 10 , the first rotating element 62 of the first interlocking element 61 is connected to the second interlocking element 70 via the second rotating element 65, but this is not limiting. As shown in FIG. 11 , the first rotating element 62 may be directly connected to the second interlocking element 70. Alternatively, the first rotating element 62 may be directly connected to the seat support 41. For example, the first rotating element 62 shown in FIG. 11 may also serve as an axis member that rotatably connects the seat support 41 and the back support 45 with respect to each other. Furthermore, the handle 30 may be directly connected to the seat support 41. In these cases, too, the seat support 41 can be swung in the front-to-rear direction in conjunction with the swinging of the handle 30. Note that FIG. 11 is a view of the left half of the stroller body 11 as seen from the front and outside.

[0065] In an example in which the handle 30 is connected to the seat support 41 directly or via the first interlocking element 61, a long hole extending in the front-rear direction may be formed in the side of the seat support 41. The shaft 67b or a corresponding protrusion of the handle 30 is inserted into the long hole. In this case, too, if the length of the long hole is shorter than the length of the path of the shaft 67b or the corresponding protrusion of the handle 30 when the handle 30 is moved from the back-pushing position to the face-pushing position, the front-rear position of the seat support 41 on the main frame 12 can be changed in accordance with the swing of the handle 30. Note that when a long hole is formed in the side of the seat support 41, the seat support 41 may have a side wall in which the long hole is formed. For example, the side wall may be attached to each of the pair of side portions 43 of the front frame member 42.

[0066] 9 to 11, the main body frame 12 may have a swing restriction portion (not shown) that restricts the swing range of the seat support body 41 and the interlocking member 60. The swing restriction portion may come into contact with or engage with the seat support body 41 or the interlocking member 60 when the handle 30 is in the back-pushing position, thereby restricting the seat support body 41 and the interlocking member 60 from swinging further backward and / or downward. The swing restriction portion may also come into contact with or engage with the seat support body 41 or the interlocking member 60 when the handle 30 is in the face-to-face pushing position, thereby restricting the seat support body 41 and the interlocking member 60 from swinging further forward and / or downward.

[0067] <Variation 2> As shown in FIG. 12 , the shaft member 20 may be directly or indirectly connected to the seat support member 41, allowing the seat support member 41 to move in the front-rear direction relative to the main frame 12. In this case, the shaft member 20 is connected to the handle 30 and the main frame 12 so as to rotate relative to the main frame 12 as the handle 30 swings. The shaft member 20 rotates about a rotation axis X20 extending in the width direction. In the example shown in FIG. 12 , the shaft member 20 has a first portion 20a that passes through the handle 30 and the main frame 12 and a second portion 20b that extends from an inner end of the first portion 20a in the width direction. The first portion 20a extends in the width direction. The second portion 20b includes a portion that extends in the radial direction of a circle centered on the rotation axis X20. As a result, when the first portion 20a swings as the handle 30 swings, the position of the end of the second portion 20b connected to the seat support member 41 relative to the main frame 12 in the front-rear direction changes. In this case as well, the seat support 41 can be swung in the front-rear direction in conjunction with the swinging of the handle 30.

[0068] 12, the main frame 12 may have a swing restriction portion (not shown) that restricts the swing range of the seat support 41 and the shaft member 20. The swing restriction portion may come into contact with or engage with the seat support 41 or the shaft member 20 when the handle 30 is in the back-pushing position, thereby restricting the seat support 41 and the shaft member 20 from swinging further backward and / or downward. The swing restriction portion may also come into contact with or engage with the seat support 41 or the shaft member 20 when the handle 30 is in the face-to-face pushing position, thereby restricting the seat support 41 and the shaft member 20 from swinging further forward and / or downward.

[0069] <Variation 3> In the above-described embodiment and modified example, the interlocking member 60 includes a first interlocking element 61 and a second interlocking element 70 that form a link mechanism, but this is not limited to this. In the example shown in FIG. 13 , the interlocking member 60 includes a rack 80 fixed to the seat support 41 and a gear 85 that rotates in response to the pivoting of the handle 30. The rack 80 has an engagement surface 81 extending in the front-rear direction. The gear 85 is rotatable around a rotation axis extending in the width direction. In the illustrated example, the gear 85 is rotatable around the shaft member 20. The gear 85 engages with the engagement surface 81 of the rack 80. This interlocking member 60 can also change the front-rear position of the seat support 41 on the main frame 12 in response to the pivoting of the handle 30. This interlocking member 60 can also convert the pivoting of the handle 30 into linear motion in the front-rear direction of the seat support 41.

[0070] <Variation 4> In the above-described embodiment and modified examples, the swinging of the handle 30 is transmitted to the seat support 41 both when the handle 30 swings from the back-pushing position to the facing-pushing position and when the handle 30 swings from the facing-pushing position to the back-pushing position, but this is not limited to this. The swinging of the handle 30 may be transmitted to the seat support 41 only when the handle 30 swings from the back-pushing position to the facing-pushing position, and may not be transmitted to the seat support 41 when the handle 30 swings from the facing-pushing position to the back-pushing position. Alternatively, the swinging of the handle 30 may be transmitted to the seat support 41 only when the handle 30 swings from the facing-pushing position to the back-pushing position, and may not be transmitted to the seat support 41 when the handle 30 swings from the back-pushing position to the facing-pushing position. In this case, the handle 30 and the seat support 41 may be connected by a flexible traction member. Examples of the flexible traction member that can be used include a wire, a string, and a chain. In this case, the pulling member may pull the seat support 41 only in either the direction from the first position to the second position or the direction from the second position to the first position as the handle 30 swings. In this case, a biasing member that biases the seat support 41 may be provided between the main frame 12 and the seat support 41. The biasing member may bias the seat support 41 in the direction opposite to the pulling direction by the pulling member. The biasing member may be, for example, a spring.

[0071] In an example using a pulling member and a biasing member, when the handle 30 is disposed in the back-pushing position, the seat support 41 may be disposed in the first position by the biasing force of the biasing member. Then, when the handle 30 pivots from the back-pushing position to the forward-pushing position, the seat support 41 may be pulled by the pulling member and move from the first position to the second position against the biasing force of the biasing member. While the handle 30 is disposed in the forward-pushing position, the seat support 41 may remain in the second position by the pulling force of the pulling member. When the handle 30 pivots from the forward-pushing position to the back-pushing position, the seat support 41 may move from the second position to the first position by the biasing force of the biasing member.

[0072] Alternatively, in an example using a pulling member and a biasing member, when the handle 30 is disposed in the forward-pushing position, the seat support 41 may be disposed in the second position by the biasing force of the biasing member. Then, when the handle 30 pivots from the forward-pushing position to the back-pushing position, the seat support 41 may be pulled by the pulling member and move from the second position to the first position against the biasing force of the biasing member. While the handle 30 is disposed in the back-pushing position, the seat support 41 may remain in the first position by the pulling force of the pulling member. When the handle 30 pivots from the back-pushing position to the forward-pushing position, the seat support 41 may move from the first position to the second position by the biasing force of the biasing member.

[0073] <Variation 5> In the above-described embodiment and some of the modified examples, the seat support 41 moves in the front-rear direction while being guided by the third link member L3, but this is not limited to this. The seat support 41 may also move in the front-rear direction while being guided by another member of the main frame 12 (for example, the first link member L1). In this case, the seat support 41 may be supported by the other member (for example, the first link member L1). When the seat support 41 is supported by the first link member L1, the seat support 41 may be disposed between the first link members L1 or above the first link member L1.

[0074] <Variation 6> In the above-described embodiment and modified examples, the seat support body 41 is movable together with the back support body 45, the canopy support body 57, and the guard material 55, but is not limited to this. The seat support body 41 does not have to be movable together with at least one of the back support body 45, the canopy support body 57, and the guard material 55. For example, at least one of the back support body 45, the canopy support body 57, and the guard material 55 may be immovable in the front-rear direction relative to the main frame 12.

[0075] The stroller 10 of the embodiment and its modified examples described above includes a stroller body 11. The stroller body 11 includes a body frame 12, a handle 30, and a seat support unit 40. The handle 30 is attached to the body frame 12 so as to be able to swing in the front-to-rear direction. The seat support unit 40 is held by the body frame 12. The seat support unit 40 includes a seat support 41. The front-to-rear position of the seat support 41 on the body frame 12 changes in response to the swinging of the handle 30. With this stroller 10, when the position of the handle 30 is changed, it is possible to prevent change in the front-to-rear distance between the position of the center of gravity of an infant on the stroller 10 and the grip portion 33 of the handle 30, and it is possible to prevent change in the operability of the stroller 10.

[0076] In the embodiment and its variations described above, the stroller body 11 further includes an interlocking member 60 connected to the seat support 41 and the handle 30. The interlocking member 60 moves the seat support 41 in conjunction with the handle 30. With this stroller 10, the seat support 41 can be moved automatically in response to the swinging of the handle 30.

[0077] In the embodiment and its modified example described above, the interlocking member 60 includes a first interlocking element 61 that swings back and forth together with the swing of the handle 30. The first interlocking element 61 is directly or indirectly connected to the seat support 41.

[0078] In the embodiment and its modified examples described above, the main body frame 12 includes the front legs 14 and rear legs 16. The seat support unit 40 is disposed on the inside of the main body frame 12 in the width direction. The handle 30 is connected to the outside of the main body frame 12 in the width direction. The first interlocking element 61 passes behind the rear legs 16 and extends inside the main body frame 12. This stroller 10 reduces the risk that the interlocking member 60 will interfere with the components of the main body frame 12 and hinder the folding or unfolding operation of the stroller main body 11.

[0079] In the embodiment and its modified example described above, the interlocking member 60 includes a first interlocking element 61 and a second interlocking element 70 connected to the seat support 41. The second interlocking element 70 converts the rocking movement of the first interlocking element 61 into linear movement in the front-to-rear direction of the seat support 41. With this stroller 10, the seat support 41 can be moved in the front-to-rear direction without moving it up and down.

[0080] In the embodiment and its modified examples described above, the main body frame 12 guides the movement of the seat support 41 in accordance with the swinging of the handle 30. With this stroller 10, the seat support 41 can be moved stably.

[0081] In the embodiment described above, the main body frame 12 includes a first link member L1, front legs 14, rear legs 16, a second link member L2, and a third link member L3. The front legs 14 are connected to the first link member L1 and are rotatable relative to the first link member L1. The rear legs 16 are connected to the first link member L1 and are rotatable relative to the first link member L1. The second link member L2 is connected to the first link member L1 and is rotatable relative to the first link member L1. The third link member L3 is provided between the front legs 14 and the second link member L2 and is rotatable relative to the front legs 14 and the second link member L2. The third link member L3 guides the movement of the seat support 41 in accordance with the swinging of the handle 30. With this stroller 10, part of the link mechanism that enables the folding of the main body frame 12 can be used as a rail member that guides the movement of the seat support 41.

[0082] In the modified example described above, the interlocking member 60 includes a rack 80 and a gear 85. The rack 80 extends in the front-rear direction and is connected to the seat support 41. The gear 85 meshes with the meshing surface 81 of the rack 80 and rotates in conjunction with the swing of the handle 30. This interlocking member 60 also allows the seat support 41 to move in the front-rear direction relative to the main frame 12. This interlocking member 60 also allows the swing of the handle 30 to be converted into linear movement of the seat support 41 in the front-rear direction.

[0083] In the embodiment and its modified example described above, the interlocking member 60 converts the swinging motion of the handle 30 into linear motion in the front-to-rear direction of the seat support 41. With this stroller 10, the seat support 41 can be moved in the front-to-rear direction without moving it up and down.

[0084] In the embodiment and its variations described above, the handle 30 can swing back and forth between a back-pushing position and a forward-pushing position. The seat support 41 is positioned at a first position when the handle 30 is in the back-pushing position, and is positioned at a second position forward of the first position when the handle 30 is in the forward-pushing position. With this stroller 10, when the position of the handle 30 is changed, it is possible to effectively prevent changes in the front-to-back distance between the center of gravity of an infant on the stroller 10 and the grip portion 33 of the handle 30, and it is possible to effectively prevent changes in the operability of the stroller 10.

[0085] In the embodiment and its variations described above, the main body frame 12 includes the front legs 14 and the rear legs 16. The seat support unit 40 includes a back support 45 connected to the seat support 41. In a side view of the stroller main body 11, the connection between the seat support 41 and the back support 45 is behind the rear legs 16 when the seat support 41 is in the first position, and is in front of the rear legs 16 when the seat support 41 is in the second position. With this stroller 10, when the position of the handle 30 is changed, it is possible to effectively prevent change in the front-to-rear distance between the position of the center of gravity of an infant on the stroller 10 and the grip portion 33 of the handle 30, and it is possible to effectively prevent change in the operability of the stroller 10.

[0086] In the embodiment and its variations described above, when viewed from the side of the stroller body 11, the distance D2 in the front-to-rear direction between the first position and the second position is at least one-fourth the distance D3 between the front legs 14 and the rear legs 16 at the height position of the seat support 41 in the first position. With this stroller 10, when the position of the handle 30 is changed, it is possible to effectively prevent changes in the distance in the front-to-rear direction between the position of the center of gravity of the baby on the stroller 10 and the grip portion 33 of the handle 30, and it is possible to effectively prevent changes in the operability of the stroller 10.

[0087] In the embodiment and its modified examples described above, the main body frame 12 includes a front wheel holding member 18a, a front wheel 18, a rear wheel holding member 19a, and a rear wheel 19. The front wheel holding member 18a is connected to the front leg 14. The front wheel 18 is held by the front wheel holding member 18a so as to be rotatable around a front wheel rotation shaft 18b extending horizontally. The rear wheel holding member 19a is connected to the rear leg 16. The rear wheel 19 is held by the rear wheel holding member 19a so as to be rotatable around a rear wheel rotation shaft 19b extending horizontally. In a side view of the stroller body 11, when the seat support 41 is in the second position, the front-to-rear position of the connection between the seat support 41 and the back support 45 is more than one-fourth the front-to-rear distance D4 between the connection between the front legs 14 and the front wheel holding members 18a and the connection between the rear legs 16 and the rear wheel holding members 19a, and is further forward than the connection between the rear legs 16 and the rear wheel holding members 19a. With this stroller 10, when the position of the handle 30 is changed, it is possible to effectively prevent change in the front-to-rear distance between the position of the center of gravity of the baby on the stroller 10 and the grip portion 33 of the handle 30, and to effectively prevent change in the operability of the stroller 10.

[0088] In the embodiment and its modified examples described above, the main body frame 12 includes a front wheel holding member 18a, a front wheel 18, a rear wheel holding member 19a, and a rear wheel 19. The front wheel holding member 18a is connected to the front leg 14. The front wheel 18 is held by the front wheel holding member 18a so as to be rotatable around a front wheel rotation shaft 18b extending horizontally. The front wheel holding member 18a is rotatable around a front wheel pivot shaft 18c extending vertically. The front-to-rear distance D2 between the first position and the second position is at least twice the horizontal distance D6 between the front wheel pivot shaft 18c and the front wheel rotation shaft 18b in a plane perpendicular to the front wheel rotation shaft 18b. With this stroller 10, it is possible to cancel out changes in the front-to-rear distance between the front wheel rotation shaft 18b and the center of gravity of the baby on the seat support 41 caused by the rotation of the front wheel 18. This makes it possible to suppress changes in the operability of the stroller 10 caused by the front wheels 18 turning.

[0089] In the embodiment and its modified examples described above, the seat support unit 40 includes a back support 45. The back support 45 is movable together with the seat support 41. With this stroller 10, even if the position of the seat support 41 relative to the main frame 12 changes in the fore-and-aft direction, the positional relationship between the seat support 41 and the back support 45 is maintained. This prevents changes in the riding comfort of the stroller 10 before and after changing the fore-and-aft direction position of the seat support 41. Furthermore, when the position of the handle 30 is changed, changes in the fore-and-aft direction distance between the position of the center of gravity of the seat support unit 40 and the grip portion 33 of the handle 30 can be effectively prevented, and changes in the operability of the stroller 10 can be effectively prevented.

[0090] In the embodiment and its modified examples described above, the seat support unit 40 includes a canopy support 57. The canopy support 57 is movable together with the seat support 41. With this stroller 10, even if the position of the seat support 41 relative to the main frame 12 changes in the front-to-rear direction, the positional relationship between the seat support 41 and the canopy support 57 (and therefore the canopy) is maintained. Even if the position of the seat support 41 changes in the front-to-rear direction, an appropriate sunshade environment can be provided for the baby on the seat support unit 40. Furthermore, when the position of the handle 30 is changed, it is possible to effectively prevent changes in the front-to-rear direction distance between the position of the center of gravity of the seat support unit 40 and the grip portion 33 of the handle 30, and thus it is possible to effectively prevent changes in the operability of the stroller 10.

[0091] In the embodiment and its modified examples described above, the seat support unit 40 includes a guard material 55. The guard material 55 is movable together with the seat support 41. With this stroller 10, even if the position of the seat support 41 relative to the main frame 12 in the front-to-rear direction changes, the positional relationship between the seat support 41 and the guard material 55 is maintained. Therefore, even if the position of the seat support 41 in the front-to-rear direction changes, the guard material 55 can appropriately guard the baby on the seat support unit 40.

[0092] In the embodiment and its modified examples described above, the main body frame 12 includes link members L1 to L4 that configure the main body frame 12 to be foldable and unfoldable. Any of the link members L1 to L4 guides the movement of the seat support body 41 in accordance with the swinging of the handle 30.

[0093] Although several modifications of the above-described embodiment have been described, it is of course possible to combine a plurality of modifications as appropriate. [Explanation of symbols]

[0094] 10: stroller, 11: stroller body, 12: body frame, 14: front legs, 16: rear legs, 18: front wheels, 18b: front wheel rotation shaft, 18c: front wheel swivel shaft, 19: rear wheels, 19b: rear wheel rotation shaft, 19c: rear wheel swivel shaft, 20: shaft member, 30: handle, 32: handle extension, 40: seat support unit, 41: seat support, 45: back support, 60: interlocking member, 61: first interlocking element, 70: second interlocking element, 80: rack, 85: gear, L1: first link member, L2: second link member, L3: third link member, L4: fourth link member

Claims

1. A stroller including a stroller body, The stroller body is A body frame, A handle attached to the main body frame so as to be swingable in the front-rear direction; a seat support unit held by the main body frame; Including, The seat support unit includes a seat support; The position of the seat support in the front-rear direction on the main body frame changes in response to the swinging of the handle, The handle can be pivoted forward and backward between a rear-pushing position and a front-pushing position, The seat support is positioned at a first position when the handle is in the rear pushing position, and is positioned at a second position forward of the first position when the handle is in the forward pushing position, The stroller body further includes an interlocking member connected to the seat support and the handle, the interlocking member moving the seat support in conjunction with the handle; The interlocking member is A first interlocking element that swings in the front-rear direction together with the swinging of the handle, the first interlocking element being directly or indirectly connected to the seat support; A second interlocking element connected to the first interlocking element and the seat support, the second interlocking element converting the rocking motion of the first interlocking element into a linear motion in the front-rear direction of the seat support; Including, baby carriage.

2. The body frame includes front legs and rear legs, The seat support unit is disposed on the inner side of the main body frame in a width direction, The handle is connected to an outer side of the main body frame in a width direction, The stroller according to claim 1 , wherein the first interlocking element passes behind the rear legs and extends inside the main body frame.

3. The stroller according to claim 1 , wherein the main body frame guides the movement of the seat support in association with the swinging of the handle.

4. The main body frame includes: A first link member; a front leg connected to the first link member and rotatable relative to the first link member; a rear leg connected to the first link member and rotatable relative to the first link member; a second link member connected to the first link member and rotatable relative to the first link member; a third link member provided between the front leg and the second link member and rotatable relative to the front leg and the second link member; having 2. The stroller according to claim 1, wherein the third link member guides the movement of the seat support in association with the swinging of the handle.

5. A stroller including a stroller body, The stroller body is A body frame, A handle attached to the main body frame so as to be swingable in the front-rear direction; a seat support unit held by the main body frame; Including, The seat support unit includes a seat support; The position of the seat support in the front-rear direction on the main body frame changes in response to the swinging of the handle, The handle can be pivoted forward and backward between a rear-pushing position and a front-pushing position, The seat support is positioned at a first position when the handle is in the rear pushing position, and is positioned at a second position forward of the first position when the handle is in the forward pushing position, The main body frame includes: A first link member; a front leg connected to the first link member and rotatable relative to the first link member; a rear leg connected to the first link member and rotatable relative to the first link member; a second link member connected to the first link member and rotatable relative to the first link member; a third link member provided between the front leg and the second link member and rotatable relative to the front leg and the second link member; having The third link member guides the movement of the seat support in accordance with the pivoting of the handle. baby carriage.

6. A stroller including a stroller body, The stroller body is A body frame, A handle attached to the main body frame so as to be swingable in the front-rear direction; a seat support unit held by the main body frame; Including, The seat support unit includes a seat support; The position of the seat support in the front-rear direction on the main body frame changes in response to the swinging of the handle, The handle can be pivoted forward and backward between a rear-pushing position and a front-pushing position, The seat support is positioned at a first position when the handle is in the rear pushing position, and is positioned at a second position forward of the first position when the handle is in the forward pushing position, The stroller body further includes an interlocking member connected to the seat support and the handle, the interlocking member moving the seat support in conjunction with the handle; The interlocking member is A rack extending in the front-rear direction and connected to the seat support; a gear that meshes with the meshing surface of the rack and rotates in response to the swinging of the handle; Including, baby carriage.

7. A stroller including a stroller body, The stroller body is A body frame, A handle attached to the main body frame so as to be swingable in the front-rear direction; a seat support unit held by the main body frame; Including, The seat support unit includes a seat support; The position of the seat support in the front-rear direction on the main body frame changes in response to the swinging of the handle, The handle can be pivoted forward and backward between a rear-pushing position and a front-pushing position, The seat support is positioned at a first position when the handle is in the rear pushing position, and is positioned at a second position forward of the first position when the handle is in the forward pushing position, The stroller body further includes an interlocking member connected to the seat support and the handle, the interlocking member moving the seat support in conjunction with the handle; The interlocking member converts the swinging motion of the handle into linear motion in the front-rear direction of the seat support.

8. The body frame includes front legs and rear legs, The seat support unit includes a back support connected to the seat support; 8. A stroller as claimed in claim 1, 5, 6 or 7, wherein, in a side view, a connection portion between the seat support and the back support is located behind the rear legs when the seat support is in the first position, and in front of the rear legs when the seat support is in the second position.

9. 9. The stroller of claim 8, wherein, in a side view, the front-to-rear distance between the first position and the second position is at least one-fourth of the distance between the front legs and the rear legs at the height position of the seat support in the first position.

10. The main body frame includes: A front wheel holding member connected to the front leg; a front wheel held by the front wheel holding member so as to be rotatable around a front wheel rotation axis extending in a horizontal direction; A rear wheel holding member connected to the rear leg; a rear wheel held by the rear wheel holding member so as to be rotatable around a rear wheel rotation axis extending in a horizontal direction; Including, 9. The stroller of claim 8, wherein, when viewed from the side, the fore-and-aft position of the connection between the seat support and the back support when the seat support is positioned in the second position is at least a quarter of the fore-and-aft distance between the connection between the front legs and the front wheel retaining member and the connection between the rear legs and the rear wheel retaining member, and is forward of the connection between the rear legs and the rear wheel retaining member.

11. The main body frame includes: A front wheel holding member connected to the front leg; a front wheel held by the front wheel holding member so as to be rotatable around a front wheel rotation axis extending in a horizontal direction; Including, The front wheel holding member is rotatable about a front wheel pivot axis extending in a vertical direction, 9. The stroller of claim 8, wherein the longitudinal distance between the first position and the second position is at least twice the horizontal distance between the front wheel pivot axis and the front wheel rotation axis in a plane perpendicular to the front wheel rotation axis.

12. A stroller including a stroller body, The stroller body is A body frame, A handle attached to the main body frame so as to be swingable in the front-rear direction; a seat support unit held by the main body frame; Including, The seat support unit includes a seat support; The position of the seat support in the front-rear direction on the main body frame changes in response to the swinging of the handle, The handle can be pivoted forward and backward between a rear-pushing position and a front-pushing position, The seat support is positioned at a first position when the handle is in the rear pushing position, and is positioned at a second position forward of the first position when the handle is in the forward pushing position, The body frame includes front legs and rear legs, The seat support unit includes a back support connected to the seat support; When viewed from the side, the connection portion between the seat support and the back support is located behind the rear legs when the seat support is in the first position, and is located in front of the rear legs when the seat support is in the second position.

13. A stroller including a stroller body, The stroller body is A body frame, A handle attached to the main body frame so as to be swingable in the front-rear direction; a seat support unit held by the main body frame; Including, The seat support unit includes a seat support; The stroller body is foldable from an unfolded state to a folded state, When the stroller body is in the unfolded state, the position of the seat support in the front-rear direction on the body frame changes in response to the swinging of the handle, The handle can be pivoted forward and backward between a rear-pushing position and a front-pushing position, When the stroller body is in the unfolded state, the seat support is positioned at a first position when the handle is in the rear pushing position, and is positioned at a second position forward of the first position when the handle is in the face-to-face pushing position, The body frame includes front legs and rear legs, A stroller in which, when viewed from the side, the front-to-rear distance between the first position and the second position is at least one-fourth of the distance between the front legs and the rear legs at the height position of the seat support in the first position.

14. A stroller including a stroller body, The stroller body is A body frame, A handle attached to the main body frame so as to be swingable in the front-rear direction; a seat support unit held by the main body frame; Including, The seat support unit includes a seat support, a back support connected to the seat support, Including, The stroller body is foldable from an unfolded state to a folded state, When the stroller body is in the unfolded state, the position of the seat support in the front-rear direction on the body frame changes in response to the swinging of the handle, The handle can be pivoted forward and backward between a rear-pushing position and a front-pushing position, When the stroller body is in the unfolded state, the seat support is positioned at a first position when the handle is in the rear pushing position, and is positioned at a second position forward of the first position when the handle is in the face-to-face pushing position, The main body frame includes: Front and rear legs, A front wheel holding member connected to the front leg; a front wheel held by the front wheel holding member so as to be rotatable around a front wheel rotation axis extending in a horizontal direction; A rear wheel holding member connected to the rear leg; a rear wheel held by the rear wheel holding member so as to be rotatable around a rear wheel rotation axis extending in a horizontal direction; Including, When viewed from the side, the stroller has a fore-and-aft position of the connection part between the seat support and the back support when the seat support is positioned in the second position that is at least one-fourth of the fore-and-aft distance between the connection part of the front legs and the front wheel retaining member and the connection part of the rear legs and the rear wheel retaining member, and is located forward of the connection part of the rear legs and the rear wheel retaining member.

15. A stroller including a stroller body, The stroller body is A body frame, A handle attached to the main body frame so as to be swingable in the front-rear direction; a seat support unit held by the main body frame; Including, The seat support unit includes a seat support; The stroller body is foldable from an unfolded state to a folded state, When the stroller body is in the unfolded state, the position of the seat support in the front-rear direction on the body frame changes in response to the swinging of the handle, The handle can be pivoted forward and backward between a rear-pushing position and a front-pushing position, When the stroller body is in the unfolded state, the seat support is positioned at a first position when the handle is in the rear pushing position, and is positioned at a second position forward of the first position when the handle is in the face-to-face pushing position, The main body frame includes: Front and rear legs, A front wheel holding member connected to the front leg; a front wheel held by the front wheel holding member so as to be rotatable around a front wheel rotation axis extending in a horizontal direction; Including, The front wheel holding member is rotatable about a front wheel pivot axis extending in a vertical direction, A stroller, wherein the front-to-rear distance between the first position and the second position is more than twice the horizontal distance between the front wheel pivot axis and the front wheel rotation axis in a plane perpendicular to the front wheel rotation axis.

16. The seat support unit includes a back support; 16. A pram as claimed in claim 1, 5, 6, 7, 12, 13, 14 or 15, wherein the back support is moveable with the seat support.

17. The seat support unit includes a top support, 16. A pram as claimed in claim 1, 5, 6, 7, 12, 13, 14 or 15, wherein the top support is moveable together with the seat support.

18. The seat support unit includes a guard material, 16. A pram as claimed in claim 1, 5, 6, 7, 12, 13, 14 or 15, wherein the guard material is moveable with the seat support.

19. The main body frame includes a link member that configures the main body frame to be foldable and unfoldable, 16. The stroller according to claim 1, 5, 6, 7, 12, 13, 14 or 15, wherein any one of the link members guides the movement of the seat support in association with the pivoting of the handle.

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