Baby carriage

Abstract

To provide a baby carriage tha suppresses the change in operability when a position of a handle is switched, in order to solve the problem that the operability of the baby carriage differs between a case where the handle is located at a back depression position and a case where the handle is located at an opposite depression position and the baby carriage becomes hard to operate.SOLUTION: A baby carriage 10 includes a baby carriage body 11. The baby carriage body 11 includes: a body frame 12; a handle 30 attached to the body frame 12 so as to be swingable in a fore-and-aft direction; and a seat support unit 40 retained by the body frame 12. The seat support unit 40 includes a seat support body 41. A position in a fore-and-aft direction of the seat support body 41 in the body frame 12 varies depending on the swinging of the handle 30.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a baby stroller.

Background Art

[0002] Baby strollers used when taking infants out are widely popular. A baby stroller has a seat support unit that supports a seat on which an infant sits, a main body frame that supports the seat support unit, and a handle attached to the main body frame. An operator (such as a caregiver) of the baby stroller can adjust the traveling direction of the baby stroller by operating the handle, and can also change the inclination of the baby stroller to cross a step. JP2018 - 202982A discloses a baby stroller in which the position of the handle can be switched between a rear - pushing position and a face - to - face pushing position.

[0003] In a baby stroller in which the position of the handle can be switched between a rear - pushing position and a face - to - face pushing position, generally, the distance between the gripping portion of the handle and the center of gravity of the infant on the baby stroller is different when the handle is arranged in the rear - pushing position and when it is arranged in the face - to - face pushing position. For this reason, the operability of the baby stroller is different when the handle is arranged in the rear - pushing position and when it is arranged in the face - to - face pushing position, and in one case, it may be difficult to operate the baby stroller.

Disclosure of the Invention

[0004] The present invention has been made in consideration of the above points, and an object thereof is to suppress a change in the operability of a baby stroller when the position of the handle is switched.

[0005] The baby stroller according to the present embodiment is a baby stroller including a baby stroller main body, wherein the baby stroller main body includes a main body frame, a handle swingably attached to the main body frame in the front - rear direction, and a seat support unit held by the main body frame, and The seat support unit includes a seat portion support, The front-back direction position of the seat portion support in the main body frame changes according to the swing of the handle.

[0006] According to the present invention, it is possible to suppress a change in the operability of the baby carriage when the position of the handle is switched.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Mode for Carrying Out the Invention

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

[0009] FIGS. 1 to 8 are views for explaining an embodiment of a stroller according to the present invention. Among these, FIGS. 1 to 4 show the overall configuration of a specific example of the stroller.

[0010] The stroller 10 of the present embodiment includes a stroller body 11. As shown in FIG. 1, the illustrated stroller body 11 generally has a substantially symmetric configuration centered on a plane along the front-rear direction and the up-down direction. The stroller body 11 has a main body frame 12 having front legs 14 and rear legs 16, a handle 30 attached to the main body frame 12, and a seat support unit 40 supported by the main body frame 12.

[0011] The handle 30 is swingable in the front-rear direction with respect to the main body frame 12. The position of the handle 30 can be changed between a rear-push position shown in FIG. 2 and a face-to-face push position shown in FIG. 3. When the handle 30 is arranged at the rear-push position, the operator (guardian) holds the handle 30 from the back side of the infant and steers the stroller 10. At this time, the side of the front legs 14 of the stroller 10 is the front in the traveling direction. When the handle 30 is arranged at the face-to-face push position, the operator holds the handle 30 from the side facing the infant and steers the stroller 10. At this time, the side of the rear legs 16 of the stroller 10 is the front in the traveling direction.

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

[0013] In the stroller 10 of the present embodiment, a device is provided to suppress a change in the operability of the stroller 10 when the position of the handle 30 is switched. Specifically, the position of the seat support body 41 in the front-rear direction on the main body frame 12 changes according to the swing of the handle 30. Thereby, it is suppressed that the distance between the grip portion of the handle 30 (an intermediate portion 33 described later) and the center of gravity of the infant on the seat support body 41 changes when the handle 30 is switched, and the operability of the stroller 10 changes.

[0014] Incidentally, in this specification, the terms "front", "rear", "upper", "lower", "front-rear direction", and "vertical direction" for the stroller and its components mean "front", "rear", "upper", "lower", "front-rear direction", and "vertical direction" based on the stroller in the deployed state and the infant riding on its components, unless otherwise specified. More specifically, the "front-rear direction" is the direction connecting the lower left and upper right of the paper surface in FIG. 1, and corresponds to the left-right direction of the paper surface in FIGS. 2 and 3. And, unless otherwise specified, "front" is the side that the riding infant faces, and the lower left side of the paper surface in FIG. 1 and the left side of the paper surface in FIGS. 2 and 3 are the front sides. On the other hand, the "vertical direction" is the direction orthogonal to the traveling surface of the stroller. Therefore, when the traveling surface is a horizontal plane, the "vertical direction" refers to the vertical direction. Also, the "lateral direction" is the width direction, which is a direction orthogonal to both the "front-rear direction" and the "vertical direction". Furthermore, the "back side" means the side opposite to the side facing the infant riding in the stroller 10. Therefore, the "back side" is usually the rear side.

[0015] Also, in this specification, the inner side in the width direction means the side approaching the center of the stroller body 11 in the width direction. On the other hand, the outer side in the width direction means the side separated from the center of the stroller body 11 in the width direction.

[0016] In a specific example shown in FIGS. 1 to 8, the stroller main 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. Also, in a specific example shown in FIGS. 1 to 8, the stroller main body 11 is foldable. Hereinafter, each element constituting the stroller main body 11 will be described in further detail.

[0017] (Main Body Frame) As shown in FIG. 1, the main body frame 12 has a pair of front legs 14 arranged on the left and right respectively, and a pair of rear legs 16 arranged on the left and right respectively. 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 configure the main body frame 12 to be foldable and deployable. In the illustrated example, the first link member L1 also functions as an armrest. That is, the first link member L1 is constituted by the armrest.

[0018] Front wheels 18 and rear wheels 19 are rotatably provided at the lower ends of the front legs 14 and the rear legs 16 respectively. The front wheels 18 and the rear wheels 19 are held by a front wheel holding member 18a and a rear wheel holding member 19a connected to the lower ends of the front wheels 18 and the rear wheels 19 respectively. The front wheel holding member 18a and the front wheel 18 constitute a caster, and the front wheel 18 is rotatable around a front wheel rotation axis 18b extending in the horizontal direction and is also swiveling around a front wheel swivel axis 18c extending in the vertical direction. Also, the rear wheel holding member 19a and the rear wheel 19 also constitute a caster, and the rear wheel 19 is rotatable around a rear wheel rotation axis 19b extending in the horizontal direction and is also swiveling around a rear wheel swivel axis 19c extending in the vertical direction.

[0019] As shown in FIG. 2, the upper end portion of the front leg 14 is rotatably (rockably) connected to the front portion of the first link member L1 disposed on the corresponding side (left or right). The upper end portion of the rear leg 16 is rotatably (rockably) connected to the front portion of the first link member L1 disposed on the corresponding side (left or right). Further, as shown in FIG. 1, the upper portion of the second link member L2 is rotatably (rockably) connected to the rear portion of the first link member L1 disposed on the corresponding side (left or right). The second link member L2 is supported by the rear leg 16 when the main body frame 12 is deployed.

[0020] The third link member L3 is provided between the front leg 14 and the second link member L2. The third link member L3 is connected to the middle portion of the front leg 14 at its front portion. The third link member L3 is rotatable with respect to the front leg 14 about a rotation axis extending in the width direction. Further, the third link member L3 is connected to the lower portion of the second link member L2 at its rear portion. The third link member L3 is rotatable with respect to the second link member L2 about a rotation axis extending in the width direction.

[0021] As shown in FIGS. 2 and 3, the third link member L3 is connected to the second link member L2 via a shaft member 20 extending in the width direction. The third link member L3 is also connected to the front leg 14 via a shaft member (not shown) extending in the width direction. Therefore, the pair of third link members L3 rotate synchronously with respect to the front leg 14 and the second link member L2. In the illustrated example, the third link member L3 extends linearly in the front-rear direction substantially in the deployed state of the stroller 10.

[0022] As shown in FIG. 1, in the illustrated example, the fourth link member L4 is rotatably connected to the rear leg 16. The fourth link member L4 is rotatably connected to the middle portion of the rear leg 16 at its lower portion. 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 each other using the same shaft member 20. This shaft member 20 passes through 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 are rotatable with respect to each other about an axis that coincides with the central axis of the shaft member 20.

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

[0024] (Handle) As described above, the handle 30 is swingable back and forth with respect to the main body frame 12. The handle 30 is swingable between a back-pushing position (see FIG. 2) and a face-pushing position (see FIG. 3). In the illustrated example, the handle 30 is inclined with respect to the vertical direction and extends upward and rearward at the back-pushing position. The handle 30 is inclined with respect to the vertical direction and extends upward and forward at the face-pushing position.

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

[0026] As shown in FIG. 1, the handle body 31 has a generally U-shaped configuration as a whole. 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 extension portions 32 that extend substantially parallel to each other, and an intermediate portion 33 that connects between the pair of handle extension portions 32. The pair of handle extension portions 32 are disposed outside the main body frame 12 in the width direction. Each handle extension portion 32 is rotatably connected to the main body frame 12 at its lower end portion. The intermediate portion 33 is a gripping portion that an operator (guardian) grips.

[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 each other about the same axis defined by the shaft member 20. The handle 30 can be maintained in the rear push position shown in FIG. 2 by the engagement of the holding body 35 provided on the handle 30 with the first holding member 36 (see FIG. 3) of the main body frame 12. The handle 30 can be maintained in the face-to-face push position shown in FIG. 3 by the engagement of the holding body 35 provided on the handle 30 with the second holding member 37 (see FIG. 2) of the main body frame 12.

[0028] The stroller body 11 having the above configuration can be folded by relatively rotating each component member. Specifically, by using the handle 30 disposed at the rear push position to first pull up the second link member L2 rearward and upward, and then pushing it downward, the fourth link member L4 is rotated clockwise with respect to the rear leg 16 in FIG. 2. Along with this operation, the first link member L1 and the third link member L3 are rotated clockwise with respect to the second link member L2 in FIG. 2. By such an operation, while maintaining the arrangement in which the second link member L2 and the front leg 14 are substantially parallel in side view, they approach each other, and the position of the handle 30 with respect to the main body frame 12 is lowered. In the above manner, as shown in FIG. 4, the stroller body 11 can be folded. In the folded state of FIG. 4, the dimensions along the front-rear direction and the vertical direction of the stroller 10 can be reduced. On the other hand, to deploy the stroller body 11 from the folded state, the reverse procedure of the above-described folding operation may be followed.

[0029] Note that the stroller body 11 has a state maintaining mechanism (not shown) that restricts the relative rotation of two component members. By operating this state maintaining mechanism, the folding operation of the stroller body 11 becomes possible. In the illustrated example, the handle 30 has a remote operation device 38 connected to the state maintaining mechanism. As shown in FIG. 1, the remote operation device 38 is provided at the intermediate portion 33 of the handle main body 31. By operating the remote operation device 38, the state maintaining mechanism operates, and the folding operation of the stroller body 11 becomes possible.

[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 part of the guard material 55 is cut away for clarity of illustration. As shown in FIG. 5, the seat support unit 40 includes a seat portion support 41 and a backrest support 45. The seat portion support 41 faces the buttocks of the infant riding in the stroller 10. The backrest support 45 faces the back of the infant. As shown in FIG. 1, the seat support unit 40 is disposed inside the main body frame 12 in the width direction. More specifically, the seat support unit 40 is disposed between the left and right front legs 14 and the rear legs 16.

[0031] As shown in FIG. 5, the seat portion support 41 has a front frame member 42. The front frame member 42 is a frame member formed in a substantially 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 end portions of the pair of side portions 43. The seat portion support 41 includes a fabric (not shown) stretched over the front frame member 42 and defining a seat surface. Alternatively, the seat portion support 41 includes a seat plate (not shown) supported from below by the front frame member 42 and defining a seat surface. The seat plate is a plate-like member formed using resin or metal. Note that when the seat portion support 41 includes a seat plate, the seat portion support 41 may not include the front frame member 42.

[0032] As will be described later, the seat portion support 41 is held by the third link member L3 via the interlocking member 60. Thereby, when folding the stroller main body 11, the seat portion support 41 can be rotated as the third link member L3 rotates. When folding the stroller main body 11, the angle of the seat portion support 41 with respect to the second link member L2 can be automatically reduced, and the front-rear dimension of the folded stroller 10 can be reduced. In other words, in a side view of the folded stroller 10, it is possible to suppress the seat portion support 41 from protruding forward of the main body frame 12.

[0033] The backrest 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 direction and / or the vertical direction, and a rear end portion 48 extending in the width direction and connecting the rear end portions of the pair of side portions 47. In the illustrated example, the backrest 45 is connected to the seat support 41. More specifically, the rear frame member 46 extends upward or rearward from the rear end portion of the front frame member 42. The backrest 45 is rotatable relative to the seat support 41 about a rotation axis X40 extending in the width direction. More specifically, the front end portion of the rear frame member 46 is rotatably connected to the rear end portion of the front frame member 42 about a rotation axis X40 extending in the width direction. By rotating the backrest 45 relative to the seat support 41, the backrest 45 can be reclined relative to the seat support 41. The backrest 45 may further have a cloth-like material or a plate-like material supported by the rear frame member 46.

[0034] The backrest 45 is supported from behind by a reclining belt 49 whose both ends are connected to the main body frame 12. Thereby, it is possible to prevent the backrest 45 from falling backward. The length of the reclining belt 49 is variable. By adjusting the length of the reclining belt 49, the backrest 45 can be reclined. Note that the reclining belt 49 is shown only in FIGS. 2 and 3. In other figures, the illustration of the reclining belt 49 is omitted.

[0035] In the illustrated example, both ends of the reclining belt 49 are connected to the first link member L1. Since the reclining belt 49 is disposed on the back side of the back support 45 at its central portion and is connected to the first link member L1 at both ends, when the main body frame 12 is folded, the back support 45 can be rotated with respect to the second link member L2 as the first link member L1 rotates. When the stroller 10 is folded, the angle of the back support 45 with respect to the second link member L2 can be automatically reduced, and the front-rear dimension of the stroller 10 in the folded state can be reduced. In other words, in a side view of the stroller 10 in the folded state, it is possible to suppress the back support 45 from protruding rearward of the second link member L2.

[0036] Furthermore, as shown in FIG. 5, the seat support unit 40 has a pair of side support portions 50 and side frame members 51 extending in the vertical direction. The side support portion 50 is located above the side portion 47 of the back support 45. In the illustrated example, the lower end portion of the side support portion 50 is fixed to the seat support 41 via an interlocking member 60 described later.

[0037] The side frame member 51 is a frame member formed in a substantially U shape. The side frame member 51 is connected to the upper end portions of the side support portions 50 at both ends of the U shape. The side frame member 51 is connected to the side support portion 50 so as to be rotatable about a rotation axis parallel to the width direction.

[0038] A pair of connecting frame members 52 are provided between the side frame member 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 member 52 is rotatable with respect to the rear frame member 46 and the side frame member 51. The connecting frame member 52 functions as a link member and swings the other as one of the rear frame member 46 and the side frame member 51 swings. Further, the connecting frame member 52 forms a wall portion that is located behind the head of the infant when the back support 45 is lying down and a wall portion that is located behind the head of the infant when the back support 45 is raised, between the rear portion of the rear frame member 46 and the rear portion of the side frame member 51.

[0039] In addition, the seat support unit 40 has a pair of guard supports 54 connected to the left and right side portions of the seat portion support 41, and a guard member 55 extending between the pair of guard supports 54. The left and right end portions of the guard member 55 are detachably connected to the left and right guard supports 54, respectively. Further, the seat support unit 40 has a canopy support 57 for supporting a canopy cloth (not shown). The canopy support 57 includes a pair of canopy support members 58 fixed to both end portions of the side frame member 51, respectively, and a canopy frame 59 extending between the pair of canopy support members 58. The canopy cloth is attached to the canopy frame 59 to form a canopy. The canopy covers the infant seated on the seat support unit 40 from above and provides a sunshade environment for the infant.

[0040] (Interlocking member) As shown in FIG. 6, the interlocking member 60 is connected to the seat portion support 41 and the handle 30, and transmits the swing of the handle 30 to the seat portion support 41. FIG. 6 is a view showing a part of the right half portion of the baby stroller body 11 shown in FIG. 2 from the inside and the rear. By the interlocking member 60, the seat portion support 41 moves in conjunction with the swing of the handle 30. More specifically, as can be understood by comparing FIGS. 2 and 3 or FIGS. 7 and 8, the position of the seat portion support 41 in the front-rear direction in the main body frame 12 changes with the swing of the handle 30 by the interlocking member 60. Note that FIG. 7 is a view showing a part of the right half portion of the baby stroller body 11 shown in FIG. 2 from the inside in the width direction. Further, FIG. 8 is a view showing a part of the right half portion of the baby stroller body shown in FIG. 3 from the inside in the width direction. In FIG. 7, the front end portion 44 of the seat portion support 41 when the handle 30 is disposed at the face-pushing position is shown by a broken line.

[0041] As shown in FIGS. 2 and 7, when the handle 30 is disposed at the back-pushing position, the seat portion support 41 is positioned at the first position. Further, as shown in FIGS. 3 and 8, when the handle 30 is disposed at the face-pushing position, the seat portion support 41 is positioned at the second position in front of the first position. In the illustrated example, the interlocking member 60 further connects the seat portion support 41 to the main body 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 formed to change the rotational movement of the handle 30 into the 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 body 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 slidably attached to the third link member L3 in the front-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 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 is swung about the shaft member 20, the first interlocking element 61 rotates about the shaft member 20 together with the handle 30. When the first interlocking element 61 swings the handle 30 forward (in the direction from the back-pushing position to the face-pushing position), it rotates in the first rotation direction (counterclockwise direction in FIGS. 7 and 8). Also, when the handle 30 is swung backward (in the direction from the face-pushing position to the back-pushing position), it rotates in the second rotation direction opposite to the first rotation direction (clockwise direction in FIGS. 7 and 8).

[0044] As well 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 32 outside the width direction of the main body frame 12. The first rotating element 62 is connected to the handle 30 using the shaft member 20. The second rotating element 65 is disposed inside the width direction 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 width direction and is fixed to the first rotating element 62 and the second rotating element 65 at both ends thereof. The rotation of the first rotating element 62 is transmitted to the second rotating element 65 by the connecting element 69.

[0045] In the illustrated example, the first rotating element 62 has a base 63 connected to the handle 30 and a rear extension 64 extending rearward or downward from the base 63. A recess for receiving the lower end of the handle extension 32 is formed in the base 63. 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 upper extension 67 extending upward from the base 66, and a rear extension 68 extending rearward or downward from the base 66. The upper extension 67 is connected to the second interlocking element 70. Specifically, at the upper end of the upper extension 67, 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 are formed. The pair of wall portions 67a receive the second interlocking element 70 therebetween.

[0047] The connecting element 69 connects the first rotating element 62 and the second rotating element 65 behind the main body frame 12. One end of the connecting element 69 is connected to the rear extension 64 of the first rotating element 62. The other end of the connecting element 69 is connected to the rear extension 68 of the second rotating element 65. As shown in FIG. 6, the first interlocking element 61 extends from the outside in the width direction of the main body frame 12, passes behind the rear leg 16, and extends to the inside in the width direction of the main body frame 12. Thereby, the risk that the interlocking member 60 interferes with the components of the main body frame 12 and inhibits the folding operation or the unfolding operation of the stroller main body 11 is suppressed.

[0048] As shown well in FIGS. 7 and 8, the second interlocking element 70 is disposed between the seat support 41 and the first interlocking element 61. The second interlocking element 70 has a base portion 71 fixed to the rear end portion of the seat support 41, a downward extending portion 72 extending downward from the base portion 71, and a rearward extending portion 73 extending rearward from the base portion 71. An annular portion 72a through which the third link member L3 is inserted is formed at the lower end portion of the downward extending portion 72. The downward extending portion 72 is slidably connected to the third link member L3 in the front-rear direction. Accordingly, 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 portion of the rearward extending portion 73 is connected to the first interlocking element 61. More specifically, a shaft insertion hole 73a is formed at the rear end portion of the rearward extending portion 73. The shaft insertion hole 73a is a long hole extending in the vertical direction. The rear end portion of the rearward extending portion 73 extends into the space between a 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 shaft insertion hole 73a which is a long hole.

[0049] Also, in the illustrated example, the side support portion 50 is connected to the rearward extending portion 73. Accordingly, the side support portion 50 is indirectly connected to the seat support 41 via the second interlocking element 70. Further, the awning support member 58 is indirectly connected to the seat support 41 via the side support portion 50 and the second interlocking element 70.

[0050] In the illustrated example, the interlocking member 60 further has 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 41 and the third link member L3. The third interlocking element 75 has a base portion 76 fixed to a side portion 43 of a front frame member 42 of the seat support 41, and a downward extending portion 77 extending downward from the base portion 76. An annular portion 77a through which the third link member L3 is inserted is formed at a lower end portion of the downward extending portion 77. The downward extending portion 77 is slidably connected to the third link member L3 in the front-rear direction. Therefore, the third interlocking element 75 is guided by the third link member L3 and is movable in the front-rear direction. Stated another way, the third link member L3 also functions as a rail member that guides the front-rear movement of the third interlocking element 75. Since 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 body frame 12, the third interlocking element 75 moves relative to the main body frame 12 together with the seat support 41. In the illustrated example, a guard support 54 is connected to the base portion 76 of the third interlocking element 75.

[0051] The stroller body 11 having the above configuration can automatically change the position of the seat support 41 in the front-rear direction on the main body frame 12 by swinging the handle 30. Specifically, when the handle 30 is swung forward, the first interlocking element 61 rotates in the first rotation direction, and the upward extension 67 of the second rotation element 65 swings forward. Along with this, the shaft portion 67b pushes the second interlocking element 70 forward while moving in the vertical direction within the shaft insertion hole 73a which is a long hole. The second interlocking element 70 moves forward together with the seat support 41 and the third interlocking element 75. Also, when the handle 30 is swung backward, the first interlocking element 61 rotates in the second rotation direction, and the upward extension 67 of the second rotation element 65 swings backward. Along with this, the shaft portion 67b pulls the second interlocking element 70 backward while moving in the vertical direction within the shaft insertion hole 73a. Thereby, the second interlocking element 70 moves backward together with the seat support 41 and the third interlocking element 75. When the seat support 41 moves in the front-rear direction with respect to the main body 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 41. For this reason, the seat support 41 moves stably in the front-rear direction on the main body frame 12.

[0052] In this way, as the position of the seat support 41 in the front-rear direction on the main body frame 12 changes according to the swing of the handle 30, the position of the center of gravity of the infant supported by the seat support 41 also changes in the front-rear direction. For this reason, the change in the distance in the front-rear direction between the gripping portion (intermediate portion 33) of the handle 30 and the center of gravity of the infant when the position of the handle 30 is switched is suppressed, and the change in the operability of the stroller 10 is suppressed.

[0053] As described above, in the illustrated example, the backrest support 45, the guard member 55, and the awning support 57 are connected to the seat support 41. Therefore, when the handle 30 is swung back and forth, the front-rear position of the backrest support 45, the guard member 55, and the awning support 57 with respect to the main body frame 12 automatically changes. In other words, when the handle 30 is swung forward, the backrest support 45, the guard member 55, and the awning support 57 move forward together with the seat support 41. Also, when the handle 30 is swung backward, the backrest support 45, the guard member 55, and the awning support 57 move backward together with the seat support 41. For this reason, even if the front-rear position of the seat support 41 with respect to the main body frame 12 changes, the positional relationship between the seat support 41 and the backrest support 45, the guard member 55, and the awning support 57 is maintained. Therefore, when the seat support 41 moves with respect to the main body frame 12, the dimensions of the living space of the seat support unit 40 do not change, and the positions of the guard member 55 and the awning with respect to the infant on the seat support 41 do not change. Therefore, it is possible to suppress a change in the riding comfort of the stroller 10 before and after changing the front-rear position of the seat support 41. Also, even if the front-rear position of the seat support 41 is changed, it is possible to appropriately provide a sunshade environment. Furthermore, as the front-rear position of the backrest support 45, the guard member 55, and the awning support 57 in the main body frame 12 changes according to the swing of the handle 30, a change in the front-rear distance between the grip portion (intermediate portion 33) of the handle 30 and the center of gravity of the seat support unit 40 when the position of the handle 30 is switched is suppressed, and a change in the operability of the stroller 10 is more effectively suppressed.

[0054] Also, in the illustrated example, the seat support 41 is supported from below by a second interlocking element 70 and a third interlocking element 75 attached to the main body frame 12. In other words, the seat support 41 is disposed above the connection portion (in the illustrated example, the third link member L3) between the main body frame 12 and the second interlocking element 70 and the third interlocking element 75. Thereby, the height position of the seat support 41 with respect to the main body frame 12 can be increased. By increasing the height position of the seat support 41, an operator of the stroller 10 can easily take care of an infant on the stroller 10.

[0055] The amount of change in the front - rear direction position of the seat support body 41 with respect to the main body frame 12 is adjustable by adjusting the length D1 (more specifically, the distance between the shaft member 20 and the shaft portion 67b) of the upward extending portion 67 of the second rotating element 65 (see FIG. 7). In the illustrated example, the connection portion (in the illustrated example, the rotation axis X40) of the second interlocking element 70 and the seat support body 41 is located behind the rear leg 16 when the handle 30 is arranged at the rear - pushing position, and is located in front of the rear leg 16 when the handle 30 is arranged at the face - pushing position. Thus, the length D1 of the second rotating element 65 is determined. Thereby, when the position of the handle 30 is switched, the change in the front - rear direction distance between the position of the center of gravity of the infant on the stroller 10 and the gripping portion 33 of the handle 30 is effectively suppressed, and the change in the operability of the stroller 10 is effectively suppressed.

[0056] Also, in the illustrated example, the front - rear direction distance D2 (for example, the front - rear direction movement distance of the front end portion 44 of the seat support body 41 when the handle 30 is switched from the rear - pushing position to the face - pushing position) between the first position and the second position of the seat support body 41 is such that it is not less than one - fourth of the front - rear direction distance D3 between the front leg 14 and the rear leg 16 at the height position of the seat support body 41 in the first position. Thus, the length D1 of the second rotating element 65 is determined. Thereby, when the position of the handle 30 is switched, the change in the front - rear direction distance between the position of the center of gravity of the infant on the stroller 10 and the gripping portion 33 of the handle 30 is effectively suppressed, and the change in the operability of the stroller 10 is effectively suppressed.

[0057] Also, in the illustrated example, the length D1 of the second moving element 65 is determined as follows. That is, in a side view of the stroller body 11, when the seat support 41 is disposed at the second position, the connecting portion of the seat support 41 and the back support 45 (in the illustrated example, the rotation axis X40) is located at least one-fourth of the front-rear distance D4 (see FIG. 3) between the connecting portion of the rear legs 16 and the rear wheel holding member 19a and the connecting portion of the front legs 14 and the front wheel holding member 18a, and is in front of the connecting portion of the rear legs 16 and the rear wheel holding member 19a (in other words, when the handle 30 is disposed at the face-pushing position, the front-rear distance D5 (see FIG. 3) between the rotation axis X40 and the connecting portion of the rear legs 16 and the rear wheel holding member 19a is at least one-fourth of the distance D4), the length D1 is determined. Thereby, when the position of the handle 30 is switched, the change in the front-rear distance between the position of the center of gravity of the infant on the stroller 10 and the gripping portion 33 of the handle 30 is more effectively suppressed, and the change in the operability of the stroller 10 is more effectively suppressed.

[0058] Also, in the illustrated example, the length D1 of the second moving element 65 is determined as follows. That is, the length D1 is determined such that the front-rear direction distance D2 (see FIG. 7) between the first position and the second position is not less than twice the horizontal direction distance D6 (see FIG. 3) between the front wheel turning axis 18c and the front wheel rotation axis 18b in a plane perpendicular to the front wheel rotation axis 18b. Here, when the front wheel holding member 18a turns about the front wheel turning axis 18c, as shown in FIGS. 2 and 3, the position of the front wheel rotation axis 18b relative to the front wheel turning axis 18c changes depending on whether the stroller 10 is operated with the handle 30 placed at the back-pushing position or with the handle 30 placed at the face-pushing position. In the illustrated example, when the stroller 10 is operated with the handle 30 placed at the back-pushing position, the front wheel rotation axis 18b is located behind the front wheel turning axis 18c. In contrast, when the stroller 10 is operated with the handle 30 placed at the face-pushing position, the front wheel rotation axis 18b is located in front of the front wheel turning axis 18c. When operating the stroller 10 with the handle 30 placed at the face-pushing position, the operator of the stroller 10 operates the stroller 10 with the front wheel rotation axis 18b as a fulcrum. In such a stroller in which the front wheels 18 turn, when the front-rear direction position of the seat support 41 does not change with the swinging of the handle 30, the front-rear direction distance between the front wheel rotation axis 18b and the seat support 41 when operating the stroller with the handle 30 placed at the face-pushing position is twice as large as the front-rear direction distance between the front wheel rotation axis 18b and the seat support 41 when operating the stroller with the handle 30 placed at the back-pushing position, as compared therewith. Therefore, in the illustrated example, by setting the front-rear direction distance D2 between the first position and the second position of the seat support 41 to be not less than twice the distance D6, the change in the front-rear direction distance between the front wheel rotation axis 18b and the seat support 41 due to the turning of the front wheels 18 is canceled out. Thereby, it is possible to suppress the change in the operability of the stroller 10 due to the turning of the front wheels 18.

[0059] Furthermore, when the stroller body 11 having the above configuration is folded, the seat support 41 moves forward with respect to the main body frame 12. In the illustrated example, when the stroller body 11 is folded, the handle 30 swings with respect to the third link member L3, and the first interlocking element 61 rotates with respect to the third link member L3. As a result, the second interlocking element 70, together with the seat support 41 and the third interlocking element 75, is pushed toward the front end side of the third link member L3. As a result, the seat support 41 moves forward with respect to the main body frame 12. When the seat support 41 moves forward with respect to the main body frame 12 when the stroller body 11 is folded, the center of gravity of the stroller body 11 moves forward. As a result, the risk of the folded stroller body 11 falling backward is suppressed. In other words, the folded stroller body 11 can be stably erected.

[0060] In the above-described example, the shaft portion 67b is formed on the first interlocking element 61, and the shaft insertion hole 73a is formed on the second interlocking element 70, but the present invention is not limited thereto. A long hole corresponding to the shaft insertion hole 73a may be formed on the first interlocking element 61, and a shaft portion corresponding to the shaft portion 67b may be formed on the second interlocking element 70. Further, the handle 30 is connected to the second interlocking element 70 via the first interlocking element 61, but the present invention is not limited thereto. The handle 30 may be directly connected to the second interlocking element 70. In other words, the interlocking member 60 may not include the first interlocking element 61. In this case, a protrusion corresponding to the shaft portion 67b may be formed on the handle 30. Alternatively, in this case, a protrusion corresponding to the shaft portion 67b may be formed on the second interlocking element 70, and a long hole corresponding to the shaft insertion hole 73a may be formed on the handle 30. Furthermore, the handle 30 may be directly connected to the seat support 40. In other words, the stroller body 11 may not include the interlocking member 60. In this case, a protrusion corresponding to the shaft portion 67b may be formed on one of the handle 30 and the seat support 40, and a long hole corresponding to the shaft insertion hole 73a may be formed on the other of the handle 30 and the seat support 40.

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

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

[0063] In the examples 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 in the vertical direction with respect to the first interlocking element 61. Therefore, the second interlocking element 70 swings as the first interlocking element 61 swings. Also, in the examples shown in FIGS. 9 and 10, the third interlocking element 75 is a link member. The third interlocking element 75 is rotatably connected to the main body frame 12 and the seat support 41. In the illustrated example, the third interlocking element 75 is rotatably connected to the third link member L3 at its lower end about a rotation axis extending in the width direction. Also, the third interlocking element 75 is rotatably connected to the side portion 43 of the seat support 41 at its upper end about a rotation axis extending in the width direction. The swing of the second interlocking element 70 is transmitted to the third interlocking element 75 through the seat support 41. For this reason, the third interlocking element 75 swings as the second interlocking element 70 swings. In other words, the second interlocking element 70 and the third interlocking element 75 swing as the handle 30 swings. As a result, the seat support 41 swings in the front-rear direction as the handle 30 swings.

[0064] In the example 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 is not limited thereto. 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 a shaft member that rotatably connects the seat support 41 and the back support 45 to each other. Further, the handle 30 may be directly connected to the seat support 41. Also in these cases, the seat support 41 can be swung back and forth as the handle 30 swings. 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 where the handle 30 is connected to the seat support 41 via the first interlocking element 61 or directly, a long hole extending in the front-rear direction may be formed on the side surface of the seat support 41. A shaft portion 67b or a protrusion of the handle 30 corresponding thereto is inserted into the long hole. Also in this case, if the length of the long hole is shorter than the length of the locus of the shaft portion 67b or the protrusion of the handle 30 corresponding thereto when moving the handle 30 from the back-pushing position to the face-pushing position, the front-rear position of the seat support 41 in the main body frame 12 can be changed as the handle 30 swings. When providing a long hole on the side surface of the seat support 41, the seat support 41 may have a side wall in which the long hole is formed. The side wall may be attached to each of a pair of side portions 43 of the front frame member 42, for example.

[0066] In the examples shown in FIGS. 9 to 11, the main body frame 12 may have a swing restricting portion (not shown) that restricts the swing ranges of the seat support 41 and the interlocking member 60. The swing restricting portion may be configured to contact or engage with the seat support 41 or the interlocking member 60 when the handle 30 is in the back-pushing position, thereby restricting the seat support 41 and the interlocking member 60 from swinging further rearward and / or downward. Further, the swing restricting portion may be configured to contact or engage with the seat support 41 or the interlocking member 60 when the handle 30 is in the face-pushing position, thereby restricting the seat support 41 and the interlocking member 60 from swinging further forward and / or downward.

[0067] <Modification Example 2> As shown in FIG. 12, when the shaft member 20 is directly or indirectly connected to the seat support 41, the seat support 41 may move in the front-rear direction with respect to the main body frame 12. In this case, the shaft member 20 is connected to the handle 30 and the main body frame 12 so as to rotate with respect to the main body 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 passing through the handle 30 and the main body frame 12, and a second portion 20b extending from an end portion inside the width direction of the first portion 20a. The first portion 20a extends in the width direction. The second portion 20b includes a portion extending in the radial direction of a circle centered on the rotation axis X20. Thereby, when the first portion 20a rotates as the handle 30 swings, the front-rear position of the end portion of the second portion 20b connected to the seat support 41 with respect to the main body frame 12 changes. Also in this case, the seat support 41 can be swung in the front-rear direction as the handle 30 swings.

[0068] In the example shown in FIG. 12, the main body frame 12 may have a swing restricting portion (not shown) that restricts the swing ranges of the seat support 41 and the shaft member 20. The swing restricting portion may be configured to contact 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 rearward and / or downward. Further, the swing restricting portion may be configured to contact or engage with the seat support 41 or the shaft member 20 when the handle 30 is in the face-pushing position, thereby restricting the seat support 41 and the shaft member 20 from swinging further forward and / or downward.

[0069] <Modification Example 3> In the above-described embodiments and modification examples, the interlocking member 60 is such that the first interlocking element 61 and the second interlocking element 70 constitute a link mechanism, but it is not limited thereto. 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 as the handle 30 swings. The rack 80 has a meshing surface 81 extending in the front-rear direction. The gear 85 is rotatable about a rotation axis extending in the width direction. In the illustrated example, the gear 85 is rotatable about the shaft member 20. The gear 85 meshes with the meshing surface 81 of the rack 80. Even with such an interlocking member 60, the position of the seat support 41 in the front-rear direction in the main body frame 12 can be changed as the handle 30 swings. Further, even with such an interlocking member 60, the swing of the handle 30 can be changed to a linear motion in the front-rear direction of the seat support 41.

[0070] <Modification Example 4> In the above-described embodiments and modifications, the swing of the handle 30 is transmitted to the seat support 41 both when the handle 30 swings from the back-push position to the face-push position and when it swings from the face-push position to the back-push position, but it is not limited to this. The swing of the handle 30 may be transmitted to the seat support 41 only when the handle 30 swings from the back-push position to the face-push position, and may not be transmitted to the seat support 41 when it swings from the face-push position to the back-push position. Alternatively, the swing of the handle 30 may be transmitted to the seat support 41 only when the handle 30 swings from the face-push position to the back-push position, and may not be transmitted to the seat support 41 when it swings from the back-push position to the face-push position. In this case, the handle 30 and the seat support 41 may be connected by a flexible traction member. As the flexible traction member, a wire, a string, a chain, etc. can be adopted. In this case, the traction 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 for biasing the seat support 41 may be provided between the main body frame 12 and the seat support 41. The biasing member may bias the seat support 41 in a direction opposite to the pulling direction by the traction member. The biasing member may be, for example, a spring.

[0071] In an example using a traction member and a biasing member, when the handle 30 is disposed at the back-push position, the seat support 41 may be disposed at the first position by the biasing force of the biasing member. Then, when the handle 30 swings from the back-push position to the face-push position, the seat support 41 may be pulled by the traction 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 at the face-push position, the seat support 41 may remain at the second position by the pulling force of the traction member. When the handle 30 swings from the face-push position to the back-push 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 traction member and a biasing member, when the handle 30 is disposed at the face-pushing position, the seat support 41 may be disposed at the second position by the biasing force of the biasing member. Then, when the handle 30 swings from the face-pushing position to the back-pushing position, the seat support 41 may be pulled by the traction 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 at the back-pushing position, the seat support 41 may remain at the first position by the pulling force of the traction member. When the handle 30 swings from the back-pushing position to the face-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] <Modification Example 5> In the above-described embodiments and several modification examples, the seat support 41 is guided by the third link member L3 and moves in the front-rear direction, but it is not limited thereto. The seat support 41 may be guided by another member (for example, the first link member L1) of the main body frame 12 and move in the front-rear direction. In this case, the seat support 41 may be supported by the above-described 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] <Modification Example 6> In the above-described embodiments and modification examples, the seat support 41 is movable together with the back support 45, the awning support 57, and the guard member 55, but it is not limited thereto. The seat support 41 may not be movable together with at least one of the back support 45, the awning support 57, and the guard member 55. For example, at least one of the back support 45, the awning support 57, and the guard member 55 may be immovable in the front-rear direction with respect to the main body frame 12.

[0075] The baby stroller 10 of the embodiment and its modification 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 swingable in the front-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 position of the seat support 41 in the front-rear direction on the body frame 12 changes according to the swing of the handle 30. According to such a baby stroller 10, when the position of the handle 30 is switched, it is possible to suppress a change in the distance in the front-rear direction between the position of the center of gravity of the infant on the baby stroller 10 and the gripping portion 33 of the handle 30, and it is possible to suppress a change in the operability of the baby stroller 10.

[0076] In the embodiment and its modification 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. According to such a baby stroller 10, the seat support 41 can be automatically moved according to the swing of the handle 30.

[0077] In the embodiment and its modification described above, the interlocking member 60 includes a first interlocking element 61 that swings in the front-rear direction 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 modification described above, the body frame 12 includes front legs 14 and rear legs 16. The seat support unit 40 is disposed inside the body frame 12 in the width direction. The handle 30 is connected to the outside of the body frame 12 in the width direction. The first interlocking element 61 extends inside the body frame 12 by passing behind the rear legs 16. According to such a baby stroller 10, the possibility that the interlocking member 60 interferes with the components of the body frame 12 and inhibits the folding operation or unfolding operation of the stroller body 11 is suppressed.

[0079] In the embodiment and its modification 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 changes the swinging motion of the first interlocking element 61 into a linear motion in the front-rear direction of the seat support 41. According to such a baby stroller 10, the seat support 41 can be moved in the front-rear direction without moving the seat support 41 in the vertical direction.

[0080] In the embodiment and its modification described above, the main body frame 12 guides the movement of the seat support 41 accompanying the swinging of the handle 30. According to such a baby stroller 10, the seat support 41 can be stably moved.

[0081] In the embodiment described above, the main body frame 12 includes a first link member L1, a front leg 14, a rear leg 16, a second link member L2, and a third link member L3. The front leg 14 is connected to the first link member L1 and is rotatable with respect to the first link member L1. The rear leg 16 is connected to the first link member L1 and is rotatable with respect to the first link member L1. The second link member L2 is connected to the first link member L1 and is rotatable with respect to the first link member L1. The third link member L3 is provided between the front leg 14 and the second link member L2 and is rotatable with respect to the front leg 14 and the second link member L2. The third link member L3 guides the movement of the seat support 41 accompanying the swinging of the handle 30. According to such a baby stroller 10, a part of the link mechanism for realizing the folding of the main body frame 12 can be used as a rail member for guiding the movement of the seat support 41.

[0082] In the modification 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 as the handle 30 swings. Even with such an interlocking member 60, the seat support 41 can be moved in the front-rear direction with respect to the main body frame 12. Also, even with such an interlocking member 60, the swinging of the handle 30 can be changed to a linear motion in the front-rear direction of the seat support 41.

[0083] In the above-described embodiment and its modification, the interlocking member 60 changes the swinging of the handle 30 to a linear motion in the front-rear direction of the seat support 41. According to such a baby stroller 10, the seat support 41 can be moved in the front-rear direction without moving the seat support 41 in the vertical direction.

[0084] In the above-described embodiment and its modification, the handle 30 is swingable in the front-rear direction between a rear-pushing position and a face-to-face pushing position. The seat support 41 is positioned at the first position when the handle 30 is at the rear-pushing position, and is positioned at the second position in front of the first position when the handle 30 is at the face-to-face pushing position. According to such a baby stroller 10, when the position of the handle 30 is switched, it is possible to effectively suppress a change in the distance in the front-rear direction between the position of the center of gravity of the infant on the baby stroller 10 and the gripping portion 33 of the handle 30, and it is possible to effectively suppress a change in the operability of the baby stroller 10.

[0085] In the embodiment and its modification described above, the main body frame 12 includes a front leg 14 and a rear leg 16. The seat support unit 40 includes a backrest support 45 connected to the seat support 41. In a side view of the stroller main body 11, the connection portion between the seat support 41 and the backrest support 45 is behind the rear leg 16 when the seat support 41 is in the first position, and in front of the rear leg 16 when the seat support 41 is in the second position. According to such a stroller 10, when the position of the handle 30 is switched, it is possible to effectively suppress a change in the distance in the front-rear direction between the position of the center of gravity of the infant on the stroller 10 and the grip portion 33 of the handle 30, and it is possible to effectively suppress a change in the operability of the stroller 10.

[0086] In the embodiment and its modification described above, in a side view of the stroller main body 11, the distance D2 in the front-rear direction between the first position and the second position is ¼ or more of the distance D3 between the front leg 14 and the rear leg 16 at the height position of the seat support 41 in the first position. According to such a stroller 10, when the position of the handle 30 is switched, it is possible to effectively suppress a change in the distance in the front-rear direction between the position of the center of gravity of the infant on the stroller 10 and the grip portion 33 of the handle 30, and it is possible to effectively suppress a change in the operability of the stroller 10.

[0087] In the embodiment and its modifications described above, the 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 rotatably held by the front wheel holding member 18a around a front wheel rotation axis 18b extending in the horizontal direction. The rear wheel holding member 19a is connected to the rear leg 16. The rear wheel 19 is rotatably held by the rear wheel holding member 19a around a rear wheel rotation axis 19b extending in the horizontal direction. In a side view of the stroller body 11, when the seat support 41 is disposed at the second position, the position in the front-rear direction of the connection portion of the seat support 41 and the back support 45 is more than one-fourth of the distance D4 in the front-rear direction between the connection portion of the front leg 14 and the front wheel holding member 18a and the connection portion of the rear leg 16 and the rear wheel holding member 19a, and is in front of the connection portion of the rear leg 16 and the rear wheel holding member 19a. According to such a stroller 10, when the position of the handle 30 is switched, it is possible to effectively suppress a change in the distance in the front-rear direction between the position of the center of gravity of the infant on the stroller 10 and the gripping portion 33 of the handle 30, and it is possible to effectively suppress a change in the operability of the stroller 10.

[0088] In the embodiment and its modifications described above, the 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 rotatably held by the front wheel holding member 18a around a front wheel rotation axis 18b extending in the horizontal direction. The front wheel holding member 18a is pivotable about a front wheel turning axis 18c extending in the vertical direction. The distance D2 in the front-rear direction between the first position and the second position is not less than twice the horizontal distance D6 between the front wheel turning axis 18c and the front wheel rotation axis 18b in a plane perpendicular to the front wheel rotation axis 18b. According to such a stroller 10, it is possible to cancel out a change in the distance in the front-rear direction between the front wheel rotation axis 18b and the center of gravity of the infant on the seat support 41 due to the turning of the front wheel 18. Thereby, it is possible to suppress a change in the operability of the stroller 10 due to the turning of the front wheel 18.

[0089] In the embodiment and its modification described above, the seat support unit 40 includes a backrest support 45. The backrest support 45 is movable together with the seat support 41. According to such a baby carriage 10, even if the position of the seat support 41 in the front-rear direction with respect to the main body frame 12 changes, the positional relationship between the seat support 41 and the backrest support 45 is maintained. Therefore, it is suppressed that the riding comfort of the baby carriage 10 changes before and after changing the position of the seat support 41 in the front-rear direction. Further, when the position of the handle 30 is switched, it is possible to effectively suppress a change in the distance in the front-rear direction between the position of the center of gravity of the seat support unit 40 and the gripping portion 33 of the handle 30, and it is possible to effectively suppress a change in the operability of the baby carriage 10.

[0090] In the embodiment and its modification described above, the seat support unit 40 includes a canopy support 57. The canopy support 57 is movable together with the seat support 41. According to such a baby carriage 10, even if the position of the seat support 41 in the front-rear direction with respect to the main body frame 12 changes, the positional relationship between the seat support 41 and the canopy support 57 (and thus the canopy) is maintained. Even if the position of the seat support 41 in the front-rear direction is changed, it is possible to appropriately provide a sunshade environment for the infant on the seat support unit 40. Further, when the position of the handle 30 is switched, it is possible to effectively suppress a change in the distance in the front-rear direction between the position of the center of gravity of the seat support unit 40 and the gripping portion 33 of the handle 30, and it is possible to effectively suppress a change in the operability of the baby carriage 10.

[0091] In the embodiment and its modification described above, the seat support unit 40 includes a guard member 55. The guard member 55 is movable together with the seat support 41. According to such a baby carriage 10, even if the position of the seat support 41 in the front-rear direction with respect to the main body frame 12 changes, the positional relationship between the seat support 41 and the guard member 55 is maintained. Therefore, even if the position of the seat support 41 in the front-rear direction is changed, the infant on the seat support unit 40 can be appropriately guarded by the guard member 55.

[0092] In the embodiment and its modification described above, the main body frame 12 includes link members L1 to L4 configured to be foldable and deployable. Any one of the link members L1 to L4 guides the movement of the seat support 41 accompanying the swing of the handle 30.

[0093] Although several modifications to the above-described embodiment have been described, it is of course possible to appropriately combine and apply a plurality of modifications.

Explanation of Reference Numerals

[0094] 10: Stroller, 11: Stroller main body, 12: Main body frame, 14: Front leg, 16: Rear leg, 18: Front wheel, 18b: Front wheel rotation axis, 18c: Front wheel turning axis, 19: Rear wheel, 19b: Rear wheel rotation axis, 19c: Rear wheel turning axis, 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; A stroller in which 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.

2. 2. The stroller according to claim 1, wherein 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.

3. 3. The stroller according to claim 2, wherein the interlocking member includes a first interlocking element that swings forward and backward together with the swinging of the handle, the first interlocking element being directly or indirectly connected to the seat support.

4. 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 3 , wherein the first interlocking element passes behind the rear legs and extends inside the main body frame.

5. 5. A stroller as described in claim 3 or 4, wherein the interlocking member includes 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 linear motion in the fore-and-aft direction of the seat support.

6. 6. 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.

7. 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 7. 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.

8. 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; 3. The stroller of claim 2, comprising:

9. 3. The stroller according to claim 2, wherein the interlocking member converts the rocking movement of the handle into linear movement in the front-rear direction of the seat support.

10. The handle can be pivoted forward and backward between a rear-pushing position and a front-pushing position, 10. The stroller according to claim 1, wherein 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.

11. The body frame includes front legs and rear legs, The seat support unit includes a back support connected to the seat support; 11. The stroller of claim 10, 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 is located in front of the rear legs when the seat support is in the second position.

12. 12. The stroller of claim 11, wherein, in a side view, the longitudinal 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.

13. 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, A stroller as described in claim 11, 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.

14. 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, A stroller as described in any one of claims 11 to 13, wherein the fore-and-aft 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.

15. The seat support unit includes a back support; A pram as claimed in any preceding claim, wherein the back support is moveable with the seat support.

16. The seat support unit includes a top support, 16. A pram as claimed in any preceding claim, wherein the top support is moveable together with the seat support.

17. The seat support unit includes a guard material, 17. A pram as claimed in any preceding claim, wherein the guard material is moveable with the seat support.

18. The main body frame includes a link member that configures the main body frame to be foldable and unfoldable, 18. A stroller as claimed in any one of claims 1 to 17, 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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