JP7667619B1 - baby carriage - Google Patents

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 able to swing 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 front-rear position of the seat support 41 on the body frame 12 changes in response to the swinging of the handle 30.

Description

The present invention relates to a stroller.

Strollers used for taking babies and small children out are widely used. Strollers have a seat support unit that supports a seat on which a 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 also 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.

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 on 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 may be difficult to operate the stroller.

The present invention has been made in consideration of the above points, and aims to suppress changes in the operability of a stroller when the handle position is changed.

The stroller according to this embodiment is:
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.

According to the present invention, it is possible to suppress changes in the operability of the stroller when the handle position is changed.

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. FIG. 2 is a side view showing the stroller of FIG. 1 with the handle in the rear pushing position. FIG. 3 is a side view of the stroller of FIG. 1 with the handle in the facing pushing position; FIG. 4 is a side view showing the stroller of FIG. 1 in a folded state. FIG. 5 is a perspective view showing the seat support unit together with the handle and the third link member. FIG. 6 is a perspective view of the right half of the stroller as seen from the inside and rear. FIG. 7 is a diagram showing the right half of the stroller as seen from inside, with the handle positioned in the rear pushing position. FIG. 8 corresponds to FIG. 7 and shows the state in which the handle is disposed at the facing-pushing position. 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 viewed from the inside. FIG. 10 corresponds to FIG. 9 and shows the state in which the handle is disposed at the facing-pushing position. FIG. 11 is a diagram 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. FIG. 12 is a diagram showing 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. FIG. 13 is a diagram showing yet another modified example of the stroller, and is a perspective view of the right half of the stroller as viewed from the inside.

Below, one embodiment of the present invention is described with reference to a specific example shown in the drawings.

Figures 1 to 8 are diagrams for explaining one embodiment of a stroller according to the present invention. Among these, Figures 1 to 4 show the overall configuration of one specific example of a stroller.

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 with respect to a plane along the front-rear and up-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.

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 front-pushing position shown in FIG. 3. When the handle 30 is placed 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 the front in the direction of travel. When the handle 30 is placed in the front-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 the front in the direction of travel.

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.

The stroller 10 of this embodiment is designed to suppress changes in the operability of the stroller 10 when the position of the handle 30 is switched. Specifically, 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. This suppresses changes in the operability of the stroller 10 caused by a change in the distance between the gripping portion of the handle 30 (middle portion 33 described below) and the center of gravity of the baby on the seat support 41 when the handle 30 is switched.

In this specification, the terms "front", "rear", "up", "down", "front-rear direction" and "up-down direction" for the stroller and its components mean "front", "rear", "up", "down", "front-rear direction" and "up-down direction" based on the baby riding in the stroller and its components in the unfolded state, unless otherwise specified. More specifically, the "front-rear direction" is the direction connecting the lower left and upper right of the paper in FIG. 1, which corresponds to the left-right direction of the paper in FIG. 2 and FIG. 3. And, unless otherwise specified, "front" is the side facing the baby riding in the stroller, and the lower left side of the paper in FIG. 1 and the left side of the paper in FIG. 2 and FIG. 3 are the front side. On the other hand, the "up-down direction" is the direction perpendicular to the running surface of the stroller. Therefore, when the running surface is a horizontal plane, the "up-down direction" refers to the vertical direction. Also, the "lateral direction" is the width direction, which is the direction perpendicular to both the "front-rear direction" and the "up-down direction". Furthermore, the "rear side" means the side opposite to the side facing the baby riding in the stroller 10. Therefore, the "rear side" usually means the rear side.

In this specification, the inner side in the width direction refers to the side that is closer to the center of the stroller body 11 in the width direction. On the other hand, the outer side in the width direction refers to the side that is farther away from the center of the stroller body 11 in the width direction.

In one embodiment shown in Figures 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 one embodiment shown in Figures 1 to 8, the stroller body 11 is foldable. Each element constituting the stroller body 11 will be described in further detail below.

(Main frame)
As shown in Fig. 1, the main 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 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. 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 frame 12 to be foldable and unfoldable. In the illustrated example, the first link member L1 also functions as an armrest. That is, the first link member L1 is configured by the armrest.

Front and rear wheels 18 and 19 are rotatably provided at the lower ends of the front and rear legs 14 and 16, respectively. The front and rear wheels 18 and 19 are held by front and rear wheel holding members 18a and 19a, respectively, which are connected to the lower ends of the front and rear wheels 18 and 19. The front and rear wheel holding members 18a and 19a form casters, and the front wheels 18 can rotate around the front wheel rotation shaft 18b extending horizontally and can rotate around the front wheel swivel shaft 18c extending vertically. The rear wheel holding members 19a and 19 also form casters, and the rear wheels 19 can rotate around the rear wheel rotation shaft 19b extending horizontally and can rotate around the rear wheel swivel shaft 19c extending vertically.

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 frame 12 is unfolded.

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 at its front portion 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 third link member L3 is connected at its rear portion 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 a rotation axis extending in the width direction.

2 and 3, the third link member L3 is connected to the second link member L2 via an axle member 20 extending in the width direction. The third link member L3 is also connected to the front legs 14 via an axle member (not shown) extending 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 fore-aft direction when the stroller 10 is in the unfolded state.

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 at its lower portion to the 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 each other 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 are rotatable with each other around an axis that coincides with the central axis of the shaft member 20.

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

(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 backward at the rear pushing position. The handle 30 is inclined relative to the vertical and extends forward at the front pushing position.

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

As shown in FIG. 1, the handle body 31 has a generally U-shaped configuration. The handle body 31 is rotatably (swingably) connected to the body frame 12 at both ends of the U-shape. The handle body 31 includes a pair of handle extensions 32 that extend generally parallel to each other, and an intermediate portion 33 that connects the pair of handle extensions 32. The pair of handle extensions 32 are disposed on the outside in the width direction of the body frame 12. Each handle extension 32 is rotatably connected to the body frame 12 at its lower end. The intermediate portion 33 is a gripping portion that is gripped by the operator (guardian).

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 around the same axis defined by the shaft member 20. The retainer 35 provided on the handle 30 engages with the first retainer 36 (see FIG. 3) of the main body frame 12, thereby maintaining the handle 30 in the back pressing position shown in FIG. 2. The retainer 35 provided on the handle 30 engages with the second retainer 37 (see FIG. 2) of the main body frame 12, thereby maintaining the handle 30 in the face-to-face pressing position shown in FIG. 3.

The stroller body 11 having the above configuration can be folded by rotating each component relative to the other. Specifically, the second link member L2 is once pulled upward and rearward using the handle 30 arranged at the rear pushing position, and then pushed downward to rotate the fourth link member L4 in the clockwise direction in FIG. 2 relative to the rear leg 16. With this operation, the first link member L1 and the third link member L3 rotate in the clockwise direction in FIG. 2 relative to the second link member L2. With this operation, the second link member L2 and the front leg 14 approach each other while maintaining a substantially parallel arrangement in a side view, and the position of the handle 30 relative to the main frame 12 is lowered. In this way, the stroller body 11 can be folded as shown in FIG. 4. In the folded state of FIG. 4, the dimensions of the stroller 10 in the front-rear and up-down directions can be reduced. On the other hand, in order to unfold the stroller body 11 from the folded state, the above-mentioned folding operations are carried out in reverse order.

The stroller body 11 has a state maintenance mechanism (not shown) that regulates the relative rotation of the two components. By operating this state maintenance mechanism, the stroller body 11 can be folded. In the illustrated example, the handle 30 has a remote control device 38 connected to the state maintenance mechanism. As shown in Figure 1, the remote control device 38 is provided in the middle part 33 of the handle body 31. By operating the remote control device 38, the state maintenance mechanism is operated, and the stroller body 11 can be folded.

(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 out for clarity of illustration. 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 on the inner side in the width direction of the main body frame 12. More specifically, the seat support unit 40 is disposed between the left and right front legs 14 and rear legs 16.

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 an approximately 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) that is stretched over the front frame member 42 and defines the seat surface. Alternatively, the seat support 41 includes a seat plate (not shown) that is supported from below by the front frame member 42 and defines the seat surface. The seat plate is a plate-shaped member formed using resin or metal. In addition, when the seat support 41 includes a seat plate, the seat support 41 does not need to include the front frame member 42.

As described below, 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, and the front-to-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, the seat support 41 can be prevented from protruding forward from the main body frame 12.

The back support 45 has a rear frame member 46. The rear frame member 46 is a frame member formed in an approximately U-shape. The rear frame member 46 has a pair of side portions 47 extending in the front-rear direction and/or the up-down direction, 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 member 45 is connected to the seat support member 41. More specifically, the rear frame member 46 extends upward and backward from the rear end of the front frame member 42. The back support member 45 is rotatable relative to the seat support member 41 around 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 around the rotation axis X40 extending in the width direction. By rotating the back support member 45 relative to the seat support member 41, the back support member 45 can be reclined relative to the seat support member 41. The back support 45 may further include a fabric or plate-like material supported by the rear frame 46 .

The back support 45 is supported from the rear 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 variable. By adjusting the length of the reclining belt 49, the back support 45 can be reclined. The reclining belt 49 is only shown in Figures 2 and 3. The reclining belt 49 is omitted in the other figures.

In the illustrated example, both ends of the reclining belt 49 are connected to the first link member L1. The reclining belt 49 is arranged at its center on the back side of the back support 45 and connected to the first link member L1 at both ends, so that when the main frame 12 is folded, the back support 45 can be rotated relative to the second link member L2 in accordance with the rotation of the first link member L1. When the stroller 10 is folded, the angle of the back support 45 relative to the second link member L2 can be automatically reduced, and the dimensions of the stroller 10 in the folded state in the front-to-rear direction can be reduced. In other words, in a side view of the stroller 10 in the folded state, the back support 45 can be prevented from protruding rearward from the second link member L2.

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

The side frame material 51 is a frame material formed in a substantially U-shape. The side frame material 51 is connected to the upper end of the side support part 50 at both ends of the U. The side frame material 51 is connected to the side support part 50 so as to be rotatable about a rotation axis parallel to the width direction.

A pair of connecting frame members 52 is 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 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 head of the infant when the back support member 45 is lying down, and forms a wall portion that is located behind the head of the infant when the back support member 45 is upright.

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 hood support 57 that supports a hood cloth (not shown). The hood support 57 includes a pair of hood support members 58 fixed to both ends of the side frame member 51, respectively, and a hood bone 59 extending between the pair of hood support members 58. The hood cloth is attached to the hood bone 59 to form a hood. The hood covers the infant seated on the seat support unit 40 from above, providing the infant with a sun-shaded environment.

(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 part 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 position of the seat support 41 in the front-rear direction on the body frame 12 to change with the swinging of the handle 30. Fig. 7 is a view showing a part 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 part 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 placed in the facing-pushing position is shown by a broken line.

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

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 motion of the handle 30 into linear motion 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 attached to the third link member L3 so as to be slidable in the front-rear direction.

The first interlocking element 61 rotates around 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 frame 12 using the shaft member 20. When the handle 30 swings around the shaft member 20, the first interlocking element 61 swings around the shaft member 20 together with the handle 30. When the handle 30 swings forward (from the back pressing position toward the face pressing position), the first interlocking element 61 swings in a first swing direction (counterclockwise direction in FIGS. 7 and 8). When the handle 30 swings backward (from the face pressing position toward the back pressing position), the first interlocking element 61 swings in a second swing direction (clockwise direction in FIGS. 7 and 8) opposite to the first swing direction.

As 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 the 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 width 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.

In the illustrated example, the first pivot element 62 has a base 63 that connects to the handle 30 and a rearward or downward extension 64 that extends rearward or downward from the base 63. The base 63 has a recess that receives the lower end of the handle extension 32. The shaft member 20 passes through the base 63.

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

The connection element 69 connects the first pivot element 62 and the second pivot element 65 at the rear of the main body frame 12. One end of the connection element 69 is connected to the rear extension 64 of the first pivot element 62. The other end of the connection element 69 is connected to the rear extension 68 of the second pivot 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, passing behind the rear leg 16, to the inside 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 impede the folding or unfolding operation of the stroller body 11.

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 71 fixed to the rear end of the seat support 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 can move 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 at the rear end of the rear extension 73. The shaft insertion hole 73a is an elongated hole extending in the vertical direction. The rear end of the rear extension 73 extends between a pair of walls 67a of the second rotating element 65. The shaft 67b of the second rotating element 65 is inserted into the shaft insertion hole 73a of the rear extension 73. The shaft 67b is rotatable within the elongated shaft insertion hole 73a and is movable in the vertical direction.

In the illustrated example, the side support portion 50 is connected to the rear extension portion 73. Therefore, the side support portion 50 is indirectly connected to the seat support body 41 via the second interlocking element 70. The hood support material 58 is indirectly connected to the seat support body 41 via the side support portion 50 and the second interlocking element 70.

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 76 fixed to the side portion 43 of the front frame material 42 of the seat support 41, and a downward extension portion 77 extending downward from the base 76. An annular portion 77a through which the third link member L3 is inserted is formed at the lower end of the downward extension portion 77. The downward extension portion 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 relative to the main frame 12 together with the seat support 41. In the illustrated example, the guard support 54 is connected to a base 76 of the third interlocking element 75.

The stroller body 11 having the above configuration can automatically change the front-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 the first rotation direction, and the upper extension 67 of the second rotation element 65 swings forward. In response to this, the shaft 67b moves up and down within the shaft insertion hole 73a, which is an elongated hole, and pushes 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. When the handle 30 is swung backward, the first interlocking element 61 rotates in the second rotation direction, and the upper extension 67 of the second rotation element 65 swings backward. Accordingly, the shaft portion 67b moves up and down inside the shaft insertion hole 73a, pulling the second interlocking element 70 rearward. 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-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. Therefore, the seat support body 41 moves stably in the front-rear direction on the main frame 12.

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

As described above, in the illustrated example, the back support 45, the guard material 55, and the hood support 57 are connected to the seat support 41. Therefore, when the handle 30 is swung in the front-rear direction, the front-rear positions of the back support 45, the guard material 55, and the hood 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 hood support 57 move forward together with the seat support 41. Also, when the handle 30 is swung backward, the back support 45, the guard material 55, and the hood support 57 move backward together with the seat support 41. Therefore, even if the front-rear position of the seat support 41 relative to the main frame 12 changes, the positional relationship between the seat support 41 and the back support 45, the guard material 55, and the hood support 57 is maintained. Therefore, the seat support 41 moves relative to the main frame 12, which does not change the dimensions of the living space of the seat support unit 40, or change the positions of the guard material 55 and the hood relative to the baby on the seat support 41. This prevents the change in the ride comfort of the stroller before and after changing the position of the seat support 41 in the front-rear direction. In addition, even if the position of the seat support 41 in the front-rear direction is changed, a sunshade environment can be appropriately provided. Furthermore, by changing the positions of the back support 45, the guard material 55, and the hood support 57 in the front-rear direction on the main frame 12 in response to the swinging of the handle 30, the change in the distance in the front-rear direction between the grip part (middle part 33) of the handle 30 and the center of gravity of the seat support unit 40 when the position of the handle 30 is changed is prevented, and the change in the operability of the stroller 10 is further effectively prevented.

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 above 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 the baby on the stroller 10.

The change in the position of the seat support 41 in the front-rear direction relative to the main frame 12 can be adjusted by adjusting the length of the upper extension 67 of the second pivot element 65 (more specifically, the distance between the shaft member 20 and the shaft portion 67b) D1 (see FIG. 7). In the illustrated example, the length D1 of the second pivot element 65 is determined so that the connection portion (rotation axis X40 in the illustrated example) between the second interlocking element 70 and the seat support 41 is located behind the rear leg 16 when the handle 30 is placed in the back-pushing position, and is located in front of the rear leg 16 when the handle 30 is placed in the face-to-face pushing position. This effectively prevents the change in the front-to-back 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 switched, and effectively prevents changes in the operability of the stroller 10.

In the illustrated example, the length D1 of the second pivot element 65 is determined so that the front-to-rear distance D2 between the first and second positions of the seat support 41 (for example, the front-to-rear movement distance of 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 the front-to-rear 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. This effectively prevents 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 from changing when the position of the handle 30 is switched, and effectively prevents changes in the operability of the stroller 10.

In the illustrated example, the length D1 of the second pivot 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, the connection portion (rotation axis X40 in the illustrated example) of the seat support 41 and the back support 45 when the seat support 41 is disposed in the second position is at least one-quarter 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 forward of the connection portion of the rear leg 16 and the rear wheel holding member 19a (in other words, the front-to-rear distance D5 (see FIG. 3) between the rotation axis X40 and the connection portion of the rear leg 16 and the rear wheel holding member 19a when the handle 30 is disposed in the facing-pushing position is at least one-quarter of the distance D4). This more effectively prevents changes in the fore-and-aft 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 more effectively prevents changes in the operability of the stroller 10.

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 front-rear 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. Here, 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 between the case where the stroller 10 is operated with the handle 30 in the rear push position and the case where the stroller 10 is operated with the handle 30 in the front push position, as shown in FIG. 2 and FIG. 3. In the illustrated example, when the stroller 10 is operated with the handle 30 in the rear push 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 facing-to-pushing position, the front wheel rotation shaft 18b is located in front of the front wheel swivel shaft 18c. When the operator of the stroller 10 operates the stroller 10 with the handle 30 in the facing-to-pushing position, the operator operates the stroller 10 with the front wheel rotation shaft 18b as a fulcrum. In such a stroller in which the front wheels 18 swivel, if the front-to-rear position of the seat support 41 does not change with the swinging of the handle 30, 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 facing-to-pushing position is twice the distance D6 described above, compared to 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 back pushing position. Therefore, in the illustrated example, the distance D2 in the front-rear direction between the first position and the second position of the seat support 41 is set to at least twice the distance D6 described above, thereby canceling out the change in the front-rear distance between the front wheel rotation shaft 18b and the seat support 41 caused by turning of the front wheels 18. This makes it possible to suppress changes in the operability of the stroller 10 caused by turning of the front wheels 18.

Furthermore, when the stroller body 11 having the above configuration is folded, the seat support 41 moves forward relative to the main 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. As a result, the second interlocking element 70 is pushed toward the front end side of the third link member L3 together with the seat support 41 and the third interlocking element 75. As a result, the seat support 41 moves forward relative to the main body frame 12. When the stroller body 11 is folded, the seat support 41 moves forward relative to the main body frame 12, and the center of gravity of the stroller body 11 moves forward. As a result, the risk of the stroller body 11 in the folded state falling backward is suppressed. In other words, the stroller body 11 in the folded state can be stably raised.

In the above example, the first interlocking element 61 is formed with the shaft portion 67b, and the second interlocking element 70 is formed with the shaft insertion hole 73a, but this is not limited to this. The first interlocking element 61 may be formed with a long hole corresponding to the shaft insertion hole 73a, and the second interlocking element 70 may be formed with a shaft portion corresponding to the shaft portion 67b. In addition, 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 may not include the first interlocking element 61. In this case, the handle 30 may be formed with a protrusion corresponding to the shaft portion 67b. Alternatively, in this case, the second interlocking element 70 may be formed with a protrusion corresponding to the shaft portion 67b, and the handle 30 may be formed with a long 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 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 body 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 body 40.

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

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

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 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. In addition, in the example shown in FIG. 9 and FIG. 10, the third interlocking element 75 is a link material. The third interlocking element 75 is rotatably connected to the main frame 12 and the seat support 41. In the illustrated example, the third interlocking element 75 is connected at its lower end to the third link member L3 so as to be rotatable about a swing axis extending in the width direction. In addition, the third interlocking element 75 is connected at its upper end to the side portion 43 of the seat support 41 so as to be rotatable about a swing 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. Therefore, the third interlocking element 75 swings in association 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 association with the swing of the handle 30. As a result, the seat support body 41 swings in the front-rear direction in association with the swing of the handle 30.

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 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 an axis member that rotatably connects the seat support 41 and the back support 45 to each other. Furthermore, the handle 30 may be directly connected to the seat support 41. In these cases, the seat support 41 can be swung in the front-rear direction in accordance with the swinging of the handle 30. Note that FIG. 11 is a view of the left half of the stroller body 11 from the front and outside.

In an example in which 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 of the seat support 41. The shaft 67b or the corresponding protrusion of the handle 30 is inserted into the long hole. In this case, if the length of the long hole is shorter than the length of the trajectory 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 with the swing of the handle 30. In addition, when a long hole is provided on the side 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 the pair of side portions 43 of the front frame member 42, for example.

9 to 11, the main frame 12 may have a swing restriction portion (not shown) that restricts the swing range of the seat support 41 and the interlocking member 60. The swing restriction portion may abut or engage with the seat support 41 or the interlocking member 60 when the handle 30 is in the back pressing position to restrict the seat support 41 and the interlocking member 60 from swinging further backward and/or downward. The swing restriction portion may abut or engage with the seat support 41 or the interlocking member 60 when the handle 30 is in the face-to-face pressing position to restrict the seat support 41 and the interlocking member 60 from swinging further forward and/or downward.

<Modification 2>
As shown in FIG. 12, the shaft member 20 may be directly or indirectly connected to the seat support 41, so that the seat support 41 may 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 passing through the handle 30 and the main frame 12, and a second portion 20b extending from an end portion on the inner side in 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. As a result, when the first portion 20a swings in accordance with the swing of the handle 30, the position of the end portion of the second portion 20b connected to the seat support 41 in the front-rear direction relative to the main frame 12 changes. In this case as well, the seat support 41 can be swung in the front-rear direction in association with the swinging of the handle 30.

In the example shown in Fig. 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 abut or engage with the seat support 41 or the shaft member 20 when the handle 30 is in the back pressing position, restricting the seat support 41 and the shaft member 20 from swinging further backward and/or downward. The swing restriction portion may abut or engage with the seat support 41 or the shaft member 20 when the handle 30 is in the face-to-face pressing position, restricting the seat support 41 and the shaft member 20 from swinging further forward and/or downward.

<Modification 3>
In the above-described embodiment and modified example, the interlocking member 60 includes the first interlocking element 61 and the second interlocking element 70 that constitute a link mechanism, but 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 with the swing of the handle 30. The rack 80 has an engagement surface 81 that extends in the front-rear direction. The gear 85 can rotate around a rotation axis that extends in the width direction. In the illustrated example, the gear 85 can rotate around the shaft member 20. The gear 85 meshes with the engagement surface 81 of the rack 80. Such an interlocking member 60 can also change the front-rear position of the seat support 41 in the main frame 12 with the swing of the handle 30. In addition, such an interlocking member 60 can also change the swing of the handle 30 into a linear motion in the front-rear direction of the seat support 41.

<Modification 4>
In the above-described embodiment and modified example, the swinging of the handle 30 is transmitted to the seat support 41 both when the handle 30 swings from the back pressing position to the facing pressing position and when the handle 30 swings from the facing pressing position to the back pressing position, but this is not limited to the above. The swinging of the handle 30 may be transmitted to the seat support 41 only when the handle 30 swings from the back pressing position to the facing pressing position, and may not be transmitted to the seat support 41 when the handle 30 swings from the facing pressing position to the back pressing 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 pressing position to the back pressing position, and may not be transmitted to the seat support 41 when the handle 30 swings from the back pressing position to the facing pressing position. In this case, the handle 30 and the seat support 41 may be connected by a flexible pulling member. As the flexible pulling member, a wire, a string, a chain, or the like can be used. In this case, the towing member may tow 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 in association with the swinging of the handle 30. In this case, a biasing member for biasing 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 direction of pulling by the towing member. The biasing member may be, for example, a spring.

In an example using a towing member and a biasing member, when the handle 30 is disposed in the back pressing 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 swings from the back pressing position to the face-to-face pressing position, the seat support 41 may be pulled by the towing 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 face-to-face pressing position, the seat support 41 may remain in the second position by the towing force of the towing member. When the handle 30 swings from the face-to-face pressing position to the back pressing position, the seat support 41 may move from the second position to the first position by the biasing force of the biasing member.

Alternatively, in an example using a towing member and a biasing member, when the handle 30 is disposed in the facing-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 swings from the facing-pushing position to the back-pushing position, the seat support 41 may be pulled by the towing 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 towing force of the towing member. When the handle 30 swings from the back-pushing position to the facing-pushing position, the seat support 41 may move from the first position to the second position by the biasing force of the biasing member.

<Modification 5>
In the above-described embodiment and some 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 thereto. The seat support 41 may move in the front-rear direction while being guided by another member of the main frame 12 (e.g., the first link member L1). In this case, the seat support 41 may be supported by the other member (e.g., 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.

<Modification 6>
In the above-described embodiment and modified example, the seat support body 41 is movable together with the back support body 45, the top 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 top support body 57, and the guard material 55. For example, at least one of the back support body 45, the top support body 57, and the guard material 55 may be immovable in the front-rear direction relative to the main body frame 12.

The stroller 10 of the embodiment and its modified example 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-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-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 switched, the change in the front-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 can be suppressed, and the change in the operability of the stroller 10 can be suppressed.

In the embodiment and its modified example 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 rocking of the handle 30.

In the embodiment and the modified example thereof described above, the interlocking member 60 includes a first interlocking element 61 that swings forward and backward together with the swinging of the handle 30. The first interlocking element 61 is directly or indirectly connected to the seat support 41.

In the embodiment and its modified example described above, the main body frame 12 includes the front legs 14 and the 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 to the inside of the main body frame 12. With this stroller 10, the risk that the interlocking member 60 will interfere with the components of the main body frame 12 and impede the folding or unfolding operation of the stroller body 11 is reduced.

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 motion of the first interlocking element 61 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 the seat support 41 in the up-down direction.

In the embodiment and its modified example described above, the main frame 12 guides the movement of the seat support 41 in accordance with the swinging of the handle 30. With such a stroller 10, the seat support 41 can be moved stably.

In the embodiment described above, the main 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 can rotate relative to the first link member L1. The rear leg 16 is connected to the first link member L1 and can rotate relative to the first link member L1. The second link member L2 is connected to the first link member L1 and can rotate relative 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 can rotate relative to the front leg 14 and the second link member L2. The third link member L3 guides the movement of the seat support 41 associated with the swinging of the handle 30. According to such a stroller 10, a part of the link mechanism that realizes the folding of the main frame 12 can be used as a rail member that guides the movement of the seat support 41.

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 association with the swinging of the handle 30. Such an interlocking member 60 can also move the seat support 41 in the front-rear direction relative to the main frame 12. Moreover, such an interlocking member 60 can also change the swinging of the handle 30 into linear motion in the front-rear direction of the seat support 41.

In the embodiment and its modified example described above, the interlocking member 60 converts the rocking 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.

In the embodiment and its modified example described above, the handle 30 can swing in the front-rear direction between a rear-pushing position and a front-pushing position. The seat support 41 is positioned in a first position when the handle 30 is in the rear-pushing position, and is positioned in a second position forward of the first position when the handle 30 is in the front-pushing position. With this stroller 10, when the position of the handle 30 is switched, it is possible to effectively prevent the change in the front-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 it is possible to effectively prevent the change in the operability of the stroller 10.

In the embodiment and its modified example described above, the main 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 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 switched, the change in the front-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 can be effectively suppressed, and the change in the operability of the stroller 10 can be effectively suppressed.

In the embodiment and its modified example described above, in a side view of the stroller body 11, the front-rear distance D2 between the first position and the second position is equal to or greater than one-fourth the distance D3 between the front legs 14 and the rear legs 16 at the height 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 the change in the front-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 it is possible to effectively prevent the change in the operability of the stroller 10.

In the embodiment and its modified example 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 arranged in the second position, the front-to-rear position of the connection part of the seat support 41 and the back support 45 is more than one-fourth of the front-to-rear distance D4 between the connection part of the front leg 14 and the front wheel holding member 18a and the connection part of the rear leg 16 and the rear wheel holding member 19a, and is forward of the connection part of the rear leg 16 and the rear wheel holding member 19a. With this stroller 10, when the position of the handle 30 is changed, it is possible to effectively prevent the 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 part 33 of the handle 30, and it is possible to effectively prevent the change in the operability of the stroller 10.

In the embodiment and its modified example 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 the front wheel rotation shaft 18b extending in the horizontal direction. The front wheel holding member 18a can rotate around the front wheel rotation shaft 18c extending in the vertical direction. The front-rear distance D2 between the first position and the second position is at least twice the horizontal distance D6 between the front wheel rotation shaft 18c and the front wheel rotation shaft 18b in a plane perpendicular to the front wheel rotation shaft 18b. With such a stroller 10, the change in the front-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 can be canceled out. This makes it possible to suppress changes in the maneuverability of the stroller 10 caused by the turning of the front wheels 18.

In the embodiment and its modified example 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 such a stroller 10, even if the position of the seat support 41 in the front-rear direction relative to the main frame 12 changes, the positional relationship between the seat support 41 and the back support 45 is maintained. Therefore, the change in the ride comfort of the stroller 10 before and after changing the front-rear direction position of the seat support 41 is suppressed. In addition, 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 seat support unit 40 and the grip portion 33 of the handle 30 can be effectively suppressed, and the change in the operability of the stroller 10 can be effectively suppressed.

In the embodiment and its modified example described above, the seat support unit 40 includes a hood support 57. The hood support 57 is movable together with the seat support 41. With such a stroller 10, even if the position of the seat support 41 in the front-rear direction relative to the main frame 12 changes, the positional relationship between the seat support 41 and the hood support 57 (and therefore the hood) is maintained. Even if the position of the seat support 41 in the front-rear direction is changed, a sunshade environment can be appropriately provided for the baby on the seat support unit 40. In addition, when the position of the handle 30 is switched, the 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 grip portion 33 of the handle 30 can be effectively suppressed, and the change in the operability of the stroller 10 can be effectively suppressed.

In the embodiment and its modified example 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 such a stroller 10, even if the fore-aft position of the seat support 41 relative to the main frame 12 changes, the positional relationship between the seat support 41 and the guard material 55 is maintained. Therefore, even if the fore-aft position of the seat support 41 changes, the guard material 55 can appropriately guard the baby on the seat support unit 40.

In the embodiment and its modified example described above, the main frame 12 includes link members L1 to L4 that configure the main frame 12 to be foldable and unfoldable. Any of the link members L1 to L4 guides the movement of the seat support 41 that accompanies the swinging of the handle 30.

Although several variations on the above-mentioned embodiment have been described above, it is of course possible to apply multiple variations in combination as appropriate.

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 (19)

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. 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. The stroller according to claim 1, wherein the main frame guides the movement of the seat support in accordance with the swinging of the handle. 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. 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. 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. 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. 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. The stroller according to claim 8, wherein, in a side view, the distance in the front-rear direction between the first position and the second position is equal to or greater than one-fourth the distance between the front legs and the rear legs at the height position of the seat support in the first position. 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. 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. 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. 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. 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. 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 swivel axis and the front wheel rotation axis in a plane perpendicular to the front wheel rotation axis. 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. 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 movable together with the seat support. 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. 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.