Baby carriage

Abstract

To suppress operability of a baby carriage from being varied due to reclining operation.SOLUTION: A baby carriage 10 comprises a baby carriage body 11. The baby carriage body 11 has a body frame 12, and a seat support unit 40 held by the body frame. The seat support unit includes a seat support body 41 supported by the body frame and a back part support body 45 that can be reclined with respect to the seat support body. Either of the body frame or the seat support unit has a rail part 60 that guides the seat support body and the body frame to move relatively. The seat support body moves relatively with respect to the body frame while being guided by the rail part, in interlock with reclining operation of the back part support body.SELECTED DRAWING: Figure 8A

Description

[Technical field]

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

[0002] Strollers used for taking babies and small children out are widely used (for example, see Patent Document 1). The stroller includes a main body frame and a seat support unit. The main body frame supports the seat support unit. The seat support unit supports a cushion seat.

[0003] The seat support unit includes a seat support and a back support. The back support is capable of swinging relative to the seat support. The back support performs a reclining motion by swinging relative to the seat support. When the back support is raised up from the seat support, the baby sits on a cushion seat supported by the seat support unit. When the back support is lowered from the seat support, the baby lies on the cushion seat.

[0004] The center of gravity of the baby in the stroller shifts as the back support is reclined. This change in maneuverability of the stroller can make it difficult for the user to operate the stroller. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-202982 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above points, and has an object to suppress changes in the operability of a stroller that accompany the reclining operation. [Means for solving the problem]

[0007] [1] Equipped with a stroller body, The stroller body includes a body frame and a seat support unit supported by the body frame, The seat support unit has a seat support supported by the main body frame and a back support capable of reclining relative to the seat support, One of the main body frame and the seat support unit has a rail portion that guides relative movement between the seat support body and the main body frame, The seat support moves relatively to the main body frame while being guided by the rail portion in conjunction with the reclining movement of the back support.

[0008] [2] The rail portion guides the movement of the seat support in the forward and backward directions.

[0009] [3] The seat support comprises: When the back support is in an upright state, the back support is located at the rear in the front-rear direction, The stroller described in [1] or [2], wherein the back support is positioned forward in the fore-and-aft direction when in a reclined position.

[0010] [4] The stroller according to any one of [1] to [3], wherein the rail portion guides the movement of the seat support in the up and down direction.

[0011] [5] The seat support comprises: When the back support is in an upright position, the back support is located at a lower position in the up-down direction, The stroller described in [4], wherein the back support is positioned at the top in the vertical direction when in a reclined state.

[0012] [6] The stroller body has a guide portion provided on the body frame, The stroller according to any one of [1] to [5], wherein the back support is supported by the guide portion during the reclining operation.

[0013] [7] The stroller described in [6], wherein the guide portion is attached to the main body frame so as to be rotatable around an axis along the width direction.

[0014] [8] The stroller described in [6] or [7], wherein the guide portion has a recess for receiving the back support.

[0015] [9] The back support has a concave or convex portion, The guide portion has a protrusion inserted into the recess of the back support or a recess that receives the protrusion of the back support, The stroller according to any one of [6] to [8], wherein the guide portion slides on the back support during the reclining movement.

[0016]

[10] The guide portion has a protrusion protruding from the main body frame, The stroller according to any one of [6] to [9], wherein the convex portion of the guide portion slides on the back support during the reclining operation.

[0017]

[11] The main body frame has a link member that configures the main body frame to be foldable and unfoldable, The stroller according to any one of [1] to

[10] , wherein any one of the link members constitutes the rail portion.

[0018]

[12] 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; and 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, The stroller according to any one of [1] to

[11] , wherein the third link member constitutes the rail portion.

[0019]

[13] 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; and 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, The stroller according to any one of [6] to

[10] , wherein the guide portion is provided on the second link member.

[0020]

[14] The seat support unit has a top support, The stroller according to any one of [1] to

[13] , wherein the top support moves together with the seat support relative to the main body frame.

[0021]

[15] The seat support unit has a guard material, The stroller according to any one of [1] to

[14] , wherein the guard material moves together with the seat support relative to the main body frame. Effect of the Invention

[0022] According to the present invention, it is possible to suppress changes in the operability of the stroller that occur during the reclining operation. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a diagram for explaining an embodiment of the present invention, and is a perspective view for explaining the overall configuration of a stroller. [Diagram 2] FIG. 2 is a side view of the stroller shown in FIG. 1 with the handle disposed in a facing push position. [Diagram 3] FIG. 3 is a side view showing the stroller shown in FIG. 1 in a folded state. [Figure 4] FIG. 4 is a vertical cross-sectional view of the right half of the stroller shown in FIG. 1, seen from the inside in the width direction. [Diagram 5] FIG. 5 is an enlarged perspective view showing an example of a guide portion that can be included in the stroller shown in FIG. [Figure 6] FIG. 6 is a diagram for explaining the action of the guide portion and the back support member shown in FIG. 5, and is a partially enlarged view showing an example of a stroller. [Figure 7A] FIG. 7A is a view corresponding to FIG. 6 and showing another example of the guide portion and the back support body. [Figure 7B] FIG. 7B is a view corresponding to FIG. 6 and showing another example of the guide portion and the back support body. [Figure 8A] FIG. 8A is a diagram for explaining the operation of the stroller shown in FIG. 1, and is a side view that shows the stroller in a schematic manner. [Figure 8B] FIG. 8B is a diagram for explaining the operation of the stroller shown in FIG. 1, and is a side view that shows the stroller in a schematic manner. [Figure 8C] FIG. 8C corresponds to FIG. 8A and shows a modified example of the stroller. [Figure 8D] FIG. 9B is a view corresponding to FIG. 8B, showing the stroller shown in FIG. 8C. [Figure 9A] FIG. 9A corresponds to FIG. 8A and shows another modified example of the stroller. [Figure 9B]FIG. 9B is a view corresponding to FIG. 8B, showing the stroller shown in FIG. 9A. [Figure 9C] FIG. 9C corresponds to FIG. 9C and shows yet another modified example of the stroller. [Figure 9D] FIG. 9D is a view corresponding to FIG. 9D, showing the stroller shown in FIG. 9C. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] An embodiment of the present invention will be described with reference to the drawings.

[0025] 1 to 9D are diagrams for explaining an embodiment of a stroller according to the present invention, of which Figs. 1 to 4 show the overall configuration of one specific example of the stroller.

[0026] The stroller 10 of this embodiment includes a stroller body 11. As shown in Fig. 1, the stroller body 11 shown in the figure has a configuration that is generally symmetrical overall with respect to planes along the front-rear and up-down directions. The stroller body 11 has a main body frame 12 and a seat support unit 40 supported by the main body frame 12. The seat support unit 40 has a seat support 41 supported by the main body frame 12, and a back support 45 that can recline relative to the seat support 41.

[0027] The stroller 10 according to this embodiment is devised to suppress changes in operability of the stroller accompanying the reclining operation. Specifically, one of the main frame 12 and the seat support unit 40 includes a rail portion 60 that guides the relative movement of the seat support 41 and the main frame 12. The seat support 41 moves relative to the main frame 12 while being guided by the rail portion 60 in conjunction with the reclining operation of the back support 45. This reduces changes in the position of the center of gravity of the baby in the stroller 10 accompanying the reclining operation, suppressing changes in the operability of the stroller 10.

[0028] 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, 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 are the front side. Meanwhile, 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.

[0029] In this specification, the inside or 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 outside or inner side in the width direction refers to the side that is farther from the center of the stroller body 11 in the width direction.

[0030] Hereinafter, the present embodiment will be described with reference to the specific examples shown in the drawings.

[0031] The stroller 10 has a stroller body 11 and a cushion seat supported on a seat support unit 40. A baby riding in the stroller 10 sits on the cushion seat.

[0032] In the illustrated stroller 10, the stroller body 11 further has a handle 30 attached to the body frame 12. The handle 30 may be able to swing back and forth relative to the body frame 12. The position of the handle 30 can be changed between a rear-pushing position shown in FIG. 1 and a front-pushing position shown in FIG. 2. When the handle 30 is located at the rear-pushing position, an operator (guardian) grips the handle 30 from behind the baby to operate 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 located at the front-pushing position, an operator grips the handle 30 from the side facing the baby to operate the stroller 10. At this time, the rear legs 16 side of the stroller 10 is the front in the direction of travel.

[0033] In the illustrated embodiment, the stroller body 11 is foldable. Each element constituting the stroller body 11 will be described in further detail below.

[0034] As shown in FIG. 1, the main body frame 12 has a pair of front legs 14 arranged on the left and right, and a pair of rear legs 16 arranged on the left and right. The main body frame 12 further has a first link member L1, a second link member L2, a third link member L3, and a fourth link member L4 arranged on the left and right. 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 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.

[0035] A front wheel 18 and a rear wheel 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 wheels 18 form a caster, and are rotatable around a front wheel rotation shaft 18b extending in the horizontal direction and are rotatable around a front wheel pivot shaft 18c extending in the vertical direction. The rear wheel holding member 19a and the rear wheels 19 also form a caster, and are rotatable around a rear wheel rotation shaft 19b extending in the horizontal direction and are rotatable around a rear wheel pivot shaft 19c extending in the vertical direction.

[0036] As shown in FIG. 2, the upper end portion of the front leg 14 is rotatably (swingably) connected to the front portion of the first link member L1 arranged on the corresponding side (left or right). The upper end portion of the rear leg 16 is 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). In the illustrated example, the second link member L2 is rotatably (swingably) connected to the rear portion of the first link member L1 at its upper portion. The second link member L2 is supported by the rear leg 16 when the main frame 12 is unfolded.

[0037] 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 a middle portion of the front leg 14. The third link member L3 is rotatable relative to the front leg 14 about 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 about a rotation axis extending in the width direction.

[0038] As shown in Fig. 2, 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 legs 14 via a shaft 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 linearly in the longitudinal direction approximately when the stroller 10 is in the unfolded state.

[0039] As shown in FIG. 1, in the illustrated example, the fourth link member L4 is rotatably connected to the rear leg 16. The lower part of the fourth link member L4 is rotatably connected to the middle part 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 line that coincides with the central axis line of the shaft member 20.

[0040] As shown in Fig. 1, the main frame 12 has, as laterally extending components, a front connector 15 that connects the pair of front legs 14 and a rear connector 17 that connects the pair of rear legs 16. The front connector 15 functions as a footrest. A central connector 21 is provided between the pair of third link members L3. The front connector 15, the rear connector 17 and the central connector 21 can suppress lateral deformation of the stroller 10.

[0041] In the illustrated example, the handle 30 can swing back and forth relative to the main body frame 12, as described above. The handle 30 can swing between a rear pushing position (see FIG. 1) and a front pushing position (see FIG. 2). In the illustrated example, the handle 30 is inclined relative to the vertical direction and extends upward backward in the rear pushing position. In the front pushing position, the handle 30 is inclined relative to the vertical direction and extends upward forward.

[0042] In the illustrated example, the handle 30 has a handle body 31 pivotally attached to the body frame 12 and a holder 35 provided on the handle body 31 .

[0043] 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 extending generally parallel to each other, and an intermediate portion 33 connecting the pair of handle extensions 32. The pair of handle extensions 32 are disposed on the outer sides of the body frame 12 in the width direction. 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).

[0044] In the illustrated example, the handle body 31 is rotatably connected to the main body frame 12 by 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 handle 30 can be maintained in the back pressing position shown in FIG. 1 by engaging the holder 35 provided on the handle 30 with the first holding member 36 (see FIG. 2) of the main body frame 12. The handle 30 can be maintained in the face-to-face pressing position shown in FIG. 2 by engaging the holder 35 provided on the handle 30 with the second holding member 37 (see FIG. 1) of the main body frame 12.

[0045] The stroller body 11 having the above configuration can be folded by rotating each component relative to the other. Specifically, the handle 30 arranged at the back pressing position is used to pull the second link member L2 upward and rearward once, and then push it downward, thereby rotating the fourth link member L4 in a clockwise direction relative to the rear leg 16 in a side view similar to that of FIG. 2. With this operation, the first link member L1 and the third link member L3 rotate in a clockwise direction relative to the second link member L2 in a side view similar to that of FIG. 2. 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 body frame 12 is lowered. In this manner, the stroller body 11 can be folded as shown in FIG. 3. In the folded state of FIG. 3, 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.

[0046] The stroller body 11 may have a state maintaining mechanism (not shown) that restricts the relative rotation of the two components. By operating this state maintaining mechanism, the stroller body 11 can be folded. In the illustrated example, the handle 30 has a remote control device 38 connected to the state maintaining mechanism. As shown in FIG. 1, the remote control device 38 is provided on the middle part 33 of the handle body 31. By operating the remote control device 38, the state maintaining mechanism is operated, and the stroller body 11 can be folded.

[0047] The seat support unit 40 supports a cushion seat (not shown) on which an infant sits. As shown in Figs. 1 and 4, the seat support unit 40 has 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 inside 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.

[0048] As shown in FIG. 1, the seat 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 ends of the pair of side portions 43. The seat support 41 may have a fabric (not shown) stretched over the front frame member 42 and defining the seat surface. Alternatively, the seat support 41 may have a seat plate (not shown) supported from below by the front frame member 42 and defining 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.

[0049] As described below, the seat support 41 is held by the third link member L3. 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 dimension of the stroller 10 in the folded state in the front-rear direction 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 beyond the main body frame 12.

[0050] As shown in FIG. 1, the back support 45 has a rear frame member 46. The rear frame member 46 is a frame member formed in a substantially U-shape. The rear frame member 46 has a pair of side portions 47 extending in the front-rear 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 45 is connected to the seat support 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 45 is rotatable relative to the seat support 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. The back support 45 rotates relative to the seat support 41, so that the back support 45 can be reclined relative to the seat support 41. The back support 45 may further include a fabric or plate-like material supported by the rear frame member 46 .

[0051] As shown in Fig. 3, 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 Fig. 2. The reclining belt 49 is omitted from the other figures.

[0052] 1 and 4, 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 extend above the side parts 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.

[0053] 1, the side frame member 51 is a frame member formed in a substantially U-shape. Both ends of the side frame member 51 are connected to the upper ends of the side support parts 50. The side frame member 51 is connected to the side support parts 50 so as to be rotatable about a rotation axis parallel to the width direction.

[0054] As shown in Figs. 1 and 4, 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 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 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 standing up.

[0055] As shown in Figs. 1 and 4, the seat support unit 40 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 an infant seated on the seat support unit 40 from above, providing an environment that is shaded from the sun for the infant.

[0056] As shown in Fig. 4, in this embodiment, one of the main body frame 12 and the seat support unit 40 has a rail portion 60 that guides the relative movement of the main body frame 12 and the seat support unit 40. The other of the main body frame 12 and the seat support unit 40 may have a running portion 61 that moves on the rail portion 60. Fig. 4 shows a cross section passing through the center in the width direction and along the front-rear and up-down directions, from the inside in the width direction.

[0057] 4, in the illustrated example, the main body frame 12 has a rail portion 60. The third link member L3 of the main body frame 12 constitutes the rail portion 60. The main body frame 12 includes a left rail portion 60 and a right rail portion 60. When the stroller 10 is in an unfolded state, the third link member L3 extends in the front-rear direction.

[0058] As shown in FIG. 4 , in the illustrated example, the seat support unit 40 has a running portion 61. The seat support unit 40 has two running portions 61 spaced apart in the front-rear direction on the right rail portion 60. The seat support unit 40 has two running portions 61 spaced apart in the front-rear direction on the left rail portion 60. In the illustrated example, the seat support unit 40 has a total of four running portions 61. The running portions 61 arranged on the rail portions 60 are movable along the rail portions 60.

[0059] In the illustrated example, the seat support unit 40 has a first support member 63 and a second support member 64 fixed to the seat support member 41. The first support member 63 and the second support member 64 constitute the running portion 61. The first support member 63 and the second support member 64 are fixed to each side portion 43 of the front frame member 42. The first support member 63 and the second support member 64 are attached to the right side portion 43 at a distance from each other in the front-rear direction. The first support member 63 and the second support member 64 are attached to the left side portion 43 at a distance from each other in the front-rear direction. The first support member 63 is located forward of the second support member 64 in the front-rear direction. The second support member 64 is located rearward of the first support member 63 in the front-rear direction. The seat support unit 40 has two first support members 63 spaced apart in the width direction. The seat support unit 40 has two second support members 64 spaced apart in the width direction.

[0060] As shown in Fig. 4, the first support member 63 is fixed to a middle portion of each side portion 43. The first support member 63 has a first base portion 63a, a first coupling portion 63b, and a first connecting portion 63c. The first base portion 63a is attached to the side portion 43. The first connecting portion 63c is located on the rail portion 60 so as to be movable relative to the rail portion 60. The first connecting portion 63c may slide on the rail portion 60.

[0061] The illustrated first connection portion 63c of the first support member 63 is cylindrical. The third link member L3 constituting the rail portion 60 passes through the cylindrical first support member 63. The first coupling portion 63b couples the first base portion 63a and the first coupling portion 63c. The first support member 63 extends downward in the up-down direction from the seat support unit 40. The first base portion 63a, the first coupling portion 63b, and the first coupling portion 63c may be components integrally molded from resin.

[0062] In the illustrated example, the first support member 63 has the above-mentioned guard support 54. The guard support 54 may be integrally molded from resin together with the first base portion 63a, the first coupling portion 63b, and the first connecting portion 63c.

[0063] As shown in Fig. 4, the second support 64 is fixed to a middle portion of each side portion 43. The second support 64 has a second base portion 64a, a second coupling portion 64b, and a second connecting portion 64c. The second base portion 64a is attached to the side portion 43. The second connecting portion 64c is located on the rail portion 60 so as to be movable relative to the rail portion 60. The second connecting portion 64c may slide on the rail portion 60.

[0064] The illustrated second connection portion 64c of the second support member 64 is cylindrical. The third link member L3 constituting the rail portion 60 passes through the cylindrical second connection portion 64c. The second coupling portion 64b couples the second base portion 64a and the second connection portion 64c. The second support member 64 extends downward in the up-down direction from the seat support unit 40. The second base portion 64a, the second coupling portion 64b, and the second connection portion 64c may be parts integrally molded from resin.

[0065] In the illustrated example, the second support material 64 has the above-mentioned side support portion 50. The side support portion 50 may be integrally molded from resin together with the second base portion 64a, the second coupling portion 64b, and the second connecting portion 64c.

[0066] In the illustrated example, as shown in FIG. 4, the seat support unit 40 is located above the third link member L3 in the up-down direction by a first support member 63 and a second support member 64 extending downward from the seat support body 41.

[0067] As the running portion 61 moves on the rail portion 60, the seat support unit 40 moves relative to the main body frame 12 in a direction along the rail portion 60. In the illustrated specific example, the rail portion 60 extends in the front-rear direction. The seat support unit 40 is movable relative to the main body frame 12 in the front-rear direction. In Fig. 4 and Fig. 8A, the seat support unit 40 is located at a first position relative to the main body frame 12. In the first position, the seat support unit 40 is located forward in the front-rear direction. In Fig. 8B, the seat support unit 40 is located at a second position relative to the main body frame 12. In the second position, the seat support unit 40 is located rearward in the front-rear direction. In the illustrated example, the seat support unit 40 moves relative to the main body frame 12 between the first position and the second position.

[0068] As described above, the back support 45 can swing (rotate) relative to the seat support 41. The back support 45 reclines by swinging relative to the seat support 41. In this embodiment, the seat support 41 moves relative to the main frame 12 while being guided by the rail portion 60 together with the back support 45 in conjunction with the reclining movement of the back support 45.

[0069] Fig. 8A shows a state in which the back support 45 is reclined relative to the seat support 41. When the back support 45 is reclined relative to the seat support 41, the seat support unit 40 is located forward. In the state shown in Fig. 8A, the seat support 41 is located in the first position.

[0070] Fig. 8B shows a state in which the rear frame member 46 stands up relative to the seat support member 41. When the rear frame member 46 stands up relative to the seat support member 41, the seat support unit 40 is positioned rearward. In the state shown in Fig. 8B, the seat support member 41 is positioned in the second position.

[0071] As shown in Fig. 4, the illustrated stroller body 11 further has a guide portion 70 provided on the body frame 12. As shown in Figs. 8A and 8B, the back support 45 may be supported by the guide portion 70 during the reclining operation of the back support 45.

[0072] 8A and 8B, the guide portion 70 is held at a fixed position in the up-down direction and the front-rear direction by the main frame 12. Therefore, the portion of the back support 45 supported by the guide portion 70 passes through the fixed position in the up-down direction and the front-rear direction where the guide portion 70 is disposed during the reclining movement of the back support 45. As a result, the seat support 41 moves relative to the main frame 12 while being guided by the rail portion 60 together with the back support 45 in conjunction with the reclining movement of the back support 45.

[0073] Specifically, when the back support 45 is reclined, the height of the back support 45 decreases relatively, so that the back support 45 moves forward in the front-to-rear direction. When the back support 45 is raised, the height of the back support 45 increases relatively, so that the back support 45 moves backward in the front-to-rear direction.

[0074] The back support 45 is connected to the seat support 41. The seat support 41 is supported by the main frame 12 via the rail portion 60 so as to be relatively movable. Therefore, as the back support 45 moves, the seat support 41 connected to the back support 45 moves relatively to the main frame 12 while being guided by the rail portion 60. When the back support 45 falls relative to the seat support 41, the seat support 41 moves forward in the front-rear direction together with the back support 45 along the rail portion 60. When the back support 45 stands up relative to the seat support 41, the seat support 41 moves backward in the front-rear direction together with the back support 45 along the rail portion 60.

[0075] 4 and 5, in the illustrated example, the guide portion 70 is supported by the second link member L2 of the main body frame 12. The guide portion 70 is provided on the inner surface in the width direction of the second link member L2. The guide portion 70 faces the back support body 45 of the seat support unit 40 in the width direction.

[0076] As can be seen from FIG. 8A and FIG. 8B, the guide portion 70 is rotatable (rotatable) around an axis X70 along the width direction. The back support 45 changes its inclination angle by reclining. The guide portion 70 can rotate in response to a change in the orientation of the back support 45 during reclining. This allows the back support 45 to be stably maintained in a state in which it is supported by the guide portion 70 during the reclining operation of the back support 45. During the reclining operation of the back support 45, the guide portion 70 slides on the side portion 47 of the back support 45. By making the guide portion 70 rotatable, the relative movement of the guide portion 70 and the back support 45 can be made smoother.

[0077] In addition, when the guide portion 70 slides on the back support 45, this does not only mean that the guide portion 70 moves on the fixed back support 45, but also that the guide portion 70, which remains in a predetermined position, slides relatively on the moving back support 45.

[0078] FIG. 5 shows one specific example of the guide portion 70. In the example shown in FIG. 5, the guide portion 70 has two guide walls 71. The two guide walls 71 protrude toward the inside in the width direction. The two guide walls 71 protrude toward the back support 45. The guide portion 70 has a guide recess 72 formed between the two guide walls 71. The guide recess 72 opens toward the inside in the width direction. The guide recess 72 opens toward the back support 45.

[0079] The guide recess 72 can receive the back support 45. In the example shown in Fig. 5, the side portion 47 of the back support 45 shown by the two-dot chain line, and the linear guide 77 and back protrusion 78 described later are at least partially located in the guide recess 72. One guide wall portion 71 is located above the side portion 47, the linear guide 77, and the back protrusion 78. The other guide wall portion 71 is located below the side portion 47, the linear guide 77, and the back protrusion 78. The side portion 47, the linear guide 77, and the back protrusion 78 are restricted from coming out of the guide recess 72 by contacting the guide wall portion 71.

[0080] During the reclining operation of the back support 45, the side portions 47, etc. move within the guide recesses 72 in accordance with the movement of the seat support 41 and the back support 45. This allows the back support 45 to be stably maintained in a state in which it is supported by the guide portions 70 during the reclining operation of the back support 45. During the reclining operation of the back support 45, the side portions 47, etc. slide on the guide portions 70.

[0081] In the example shown in FIG. 5, the guide portion 70, the guide wall portion 71, and the guide recess 72 have a longitudinal direction. The guide wall portion 71 and the guide recess 72 are elongated. The guide wall portion 71 and the guide recess 72 extend along the side portion 47. According to this specific example, the back support 45 can be stably maintained in a state in which it is supported by the guide portion 70 during the reclining operation of the back support 45. The side portion 47 and the guide portion 70 can move relatively more smoothly along the axial direction of the side portion 47.

[0082] In the example shown in FIG. 5, the side portion 47 is accommodated in the guide recess 72 of the guide portion 70. However, this embodiment is not limited to this example. As shown in FIG. 6, the back support 45 may have a linear guide 77 and a connecting arm portion 76 that connects the linear guide 77 and the side portion 47. The linear guide 77 extends linearly in parallel with the side portion 47. The linear guide 77 constitutes a back protrusion 78 that protrudes toward the outside in the width direction. The linear guide 77 constitutes a back protrusion 78 that protrudes toward the guide portion 70. The linear guide 77 as the back protrusion 78 may be disposed in the guide recess 72 of the guide portion 70.

[0083] A cloth-like material or the like may be attached to the side portion 47. In the example shown in Fig. 6, the side portion 47 is separated from the guide portion 70, so that the cloth-like material or the like can be prevented from interfering with the relative movement between the back support 45 and the guide portion 70. Therefore, the relative movement between the guide portion 70 and the back support 45 can be made smoother during the reclining operation of the back support 45.

[0084] In the example shown in Fig. 6, the connecting arm portion 76 extends downward from the side portion 47. The linear guide 77 is located lower than the side portion 47 in the up-down direction. The linear guide 77 is located outward in the width direction than the side portion 47. However, the present embodiment is not limited to this example. The linear guide 77 may be located inward in the width direction than the side portion 47. The linear guide 77 may be located higher in the up-down direction than the side portion 47.

[0085] In the example shown in Fig. 5, the width W70 of the guide recess 72 of the guide portion 70 is constant. However, the present embodiment is not limited to this example. As shown in Fig. 7A, the width of the guide recess 72 does not have to be constant. The width of the guide recess 72 means the inner dimension of the guide recess 72 along a direction perpendicular to the width direction.

[0086] The back support 45 shown in Fig. 7A may be configured similarly to the back support 45 shown in Fig. 6. The back support 45 shown in Fig. 7A has a rear frame member 46, a linear guide 77, and a connecting arm portion 76 that connects the rear frame member 46 and the linear guide 77. The linear guide 77 constitutes a back protrusion 78.

[0087] In the example shown in FIG. 7A, the width of the guide recess 72 may be narrowed at the opening on the inside in the width direction. The width of the guide recess 72 at the opening may be smaller than the maximum width of the guide recess 72. The width of the guide recess 72 at the opening may be smaller than the maximum width of the part of the back support 45 that is accommodated in the guide recess 72. The width of the guide recess 72 at the opening may be smaller than the width of the side portion 47 of the back support 45. The width of the guide recess 72 at the opening may be smaller than the width of the linear guide 77 of the back support 45. The width of the guide recess 72 at the opening may be smaller than the width of the back protrusion 78 of the back support 45. According to these examples, the state in which the side portion 47, the linear guide 77, and the back protrusion 78 of the back support 45 are accommodated in the guide recess 72 can be stably maintained. The state in which the side portion 47, the linear guide 77, and the back protrusion 78 are supported by the guide recess 72 can be stably maintained. This allows the seat support 41 to move stably relative to the main frame 12 in conjunction with the reclining movement of the back support 45.

[0088] In the example shown in Fig. 6 and Fig. 7A, the back support 45 has a convex portion (back convex portion 78), and the guide portion 70 includes a concave portion (guide concave portion 72) that receives the convex portion (back convex portion 78) of the back support 45. However, this embodiment is not limited to this example. The back support 45 may include a concave portion (back concave portion) 79 or a convex portion (back convex portion) 78, and the guide portion 70 may include a convex portion (guide convex portion) 73 inserted into the concave portion (back concave portion) 79 of the back support 45, or a concave portion (guide concave portion) 72 that receives the convex portion (back convex portion) 78 of the back support 45.

[0089] In the example shown in Fig. 7B, the back support 45 has a rear frame member 46, a linear guide 77, and a connecting arm portion 76 that connects the side portion 47 and the linear guide 77. The linear guide 77 forms a back recess 79. The back recess 79 opens outward in the width direction. The back recess 79 opens toward the guide portion 70. Except for the fact that the linear guide 77 forms the back recess 79, the back support 45 shown in Fig. 7B can be configured similarly to the back support 45 shown in Fig. 6 or Fig. 7A.

[0090] In the example shown in FIG. 7B, the guide portion 70 includes a guide protrusion 73 protruding from the main body frame 12. The guide protrusion 73 may be provided on the second link member L2. The guide protrusion 73 may have a base end 73a and a tip end 73b. The base end 73a extends from the main body frame 12. The base end 73a may be rod-shaped. The tip end 73b is connected to the base end 73a. The tip end 73b is separated from the main body frame 12. The tip end 73b is accommodated in the back recess 79. The tip end 73b constitutes the tip of the guide protrusion 73. The tip end 73b may have a curved surface. The tip end 73b may have a spherical shape. The tip end 73b may be wider than the base end 73a. The guide portion 70 shown in FIG. 7B does not extend linearly along the side portion 47. The guide portion 70 shown in FIG. 7B may be a column-like or rod-like portion that protrudes from a specific position of the main body frame 12 toward the back support 45.

[0091] The guide portion 70 as the guide protrusion 73 can reduce the contact area with the back support 45. Therefore, the guide protrusion 73 and the back support 45 can slide more smoothly. The curved tip 73b or the spherical tip 73b contacts the back support 45, thereby reducing friction when the guide portion 70 and the back support 45 contact each other. This allows the guide protrusion 73 and the back support 45 to slide more smoothly. Therefore, the seat support 41 can be stably moved relative to the main frame 12 in conjunction with the reclining movement of the back support 45.

[0092] The width of the back recess 79 shown in FIG. 7B is narrowed at the opening, similar to the width of the guide recess 72 shown in FIG. 7A. In the example shown in FIG. 7A, the width of the guide recess 72 is narrowed at the opening, which is the inner side in the width direction. The width of the opening of the back recess 79 is smaller than the maximum width of the guide protrusion 73. The width of the opening of the back recess 79 may be smaller than the maximum width of the part of the guide part 70 that is accommodated in the back recess 79. The width of the opening of the back recess 79 may be smaller than the width of the tip part 73b of the guide protrusion 73. According to these examples, the state in which the guide protrusion 73 of the guide part 70 is accommodated in the guide recess 72 can be stably maintained. The state in which the back support 45 is supported by the guide part 70 can be stably maintained. As a result, the seat support 41 can be stably moved relative to the main frame 12 in conjunction with the reclining operation of the back support 45.

[0093] According to the stroller 10 having the above-mentioned configuration, the main frame 12 has a rail portion 60 that guides the relative movement of the seat support 41 and the main frame 12. The seat support 41 moves relative to the main frame 12 while being guided by the rail portion 60 together with the back support 45 in conjunction with the reclining movement of the back support 45.

[0094] As the back support is reclined, the position of the center of gravity of the baby in the stroller changes. For example, as the back support rises up against the seat support, the positions of the baby's head and upper body move upward and forward. Therefore, when the back support is raised up against the seat support, the baby's center of gravity is located upward and forward. On the other hand, as the back support falls down against the seat support, the positions of the baby's head and upper body move downward and backward. Therefore, when the back support is raised up against the seat support, the baby's center of gravity is located downward and backward. As a result, the position of the center of gravity of the entire stroller with the baby in it also changes as the back support is reclined.

[0095] When the center of gravity of a stroller changes, the maneuverability also changes. Due to the change in maneuverability, the parent operating the stroller may feel uncomfortable operating the stroller. Furthermore, if the center of gravity is too far forward, too far backward, or too far upward, it becomes difficult to turn the stroller or climb up a step.

[0096] According to this embodiment, as described above, the seat support 41 moves together with the back support 45 relative to the main body frame 12 in conjunction with the reclining movement of the back support 45. This reduces the change in the center of gravity of the baby in the stroller 10 that occurs when the back support 45 is reclined. This reduces the change in the operability of the stroller 10 that occurs when the back support 45 is reclined, and further improves the operability of the stroller 10 when turning or climbing up a step.

[0097] Furthermore, the relative movement of the seat support 41 with respect to the main body frame 12 is performed automatically in conjunction with the reclining operation. This can therefore reduce any discomfort felt by the parent operating the stroller 10. In addition, the stroller body 11 has a rail section 60, which can smoothly guide the relative movement between the seat support unit 40 and the main body frame 12. This also makes it possible to significantly reduce any discomfort felt by the parent operating the stroller 10.

[0098] In the illustrated example, the main frame 12 has a rail portion 60, and the seat support body 41 of the seat support unit 40 has a running portion 61 that moves on the rail portion 60. However, the present embodiment is not limited to this example.

[0099] The back support 45 may have at least a part of the running portion 61. For example, the second support member 64 constituting the running portion 61 may be attached to the back support 45.

[0100] Also, as shown in Figs. 8C and 8D, the seat support unit 40 may have a rail portion 60, and the main frame 12 may have a running portion 61 that moves relative to the rail portion 60 along the longitudinal direction of the rail portion 60. As shown in Figs. 8C and 8D, the side portion 43 of the front frame member 42 of the seat support 41 may constitute the rail portion 60. The first support member 63 and the second support member 64 that constitute the running portion 61 may be fixed to the third link member L3 and slide relative to the side portion 43 of the front frame member 42 of the seat support 41. Even with this modification, as shown in Fig. 8C, when the back support 45 is tilted relative to the seat support 41, the seat support 41 and the back support 45 move forward in the front-rear direction. As shown in Fig. 8D, when the back support 45 is raised relative to the seat support 41, the seat support 41 and the back support 45 move backward in the front-rear direction. This modified example also has the above-mentioned operational effect, that is, it is possible to reduce the change in the center of gravity position that occurs when the back support 45 is reclined, thereby improving the maneuverability of the stroller 10.

[0101] In the stroller 10 shown in Figs. 8C and 8D, the configuration other than the rail portion 60 and the running portion 61 may be the same as that of the stroller 10 described above with reference to Figs. 1 to 8B.

[0102] In the specific example of the stroller 10 described above with reference to Figures 1 to 8B, the rail section 60 extends in the front-rear direction. This example can reduce the change in the center of gravity in the front-rear direction that accompanies the reclining operation of the back support 45. This can improve the maneuverability of the stroller 10 when turning or climbing up a step.

[0103] In the specific example of the stroller 10 described above, as shown in Fig. 8B, when the back support 45 is raised relative to the seat support 41, the seat support 41 is located rearward in the front-rear direction. As shown in Fig. 8A, when the back support 45 is reclined relative to the seat support 41, the seat support 41 is located forward in the front-rear direction. According to this example, it is possible to effectively reduce the change in the position of the center of gravity of the baby in the front-rear direction that accompanies the reclining operation.

[0104] For example, when the back support 45 is raised relative to the seat support 41, the center of gravity of the baby can be brought closer to the center of the stroller 10 in the fore-and-aft direction, thereby improving the maneuverability of the stroller 10 when turning or going over steps.

[0105] When the back support 45 is reclined relative to the seat support 41, the center of gravity of the baby can be brought closer to the center of the stroller 10 in the front-to-rear direction, improving the maneuverability of the stroller 10 when turning or going over steps. Also, for young babies, there is a tendency to use the stroller 10 with the back support 45 reclined. With the back support 45 reclined, the seat support 41 and the back support 45 are located forward in the front-to-rear direction, making it easy to load and unload the baby onto the seat support unit 40.

[0106] In the above-described embodiment, the rail portion 60 extends in the front-rear direction, but the present embodiment is not limited to this example. For example, as shown in Figs. 9A and 9B, the rail portion 60 may extend in the up-down direction. In the example shown in Figs. 9A and 9B, the main frame 12 has a rail portion 60 extending in the up-down direction. For example, two rail portions 60 may be attached to each third link member L3 with a space between them in the front-rear direction. In the example shown in Figs. 9A and 9B, the seat support unit 40 has a running portion 61 that moves on the rail portion 60. For example, two running portions 61 may be attached to each side portion 43 of the seat support 41 with a space between them in the front-rear direction. The running portion 61 may have a cylindrical portion that is penetrated by the rail portion 60.

[0107] As the running portion 61 moves on the rail portion 60, the seat support unit 40 moves relative to the main body frame 12 in the up-down direction along the rail portion 60. In FIG. 9A, the seat support unit 40 is located at a first position relative to the main body frame 12. In the first position, the seat support unit 40 is located at an upper position in the up-down direction. In FIG. 9B, the seat support unit 40 is located at a second position relative to the main body frame 12. In the second position, the seat support unit 40 is located at a lower position in the up-down direction. In the illustrated example, the seat support unit 40 moves relative to the main body frame 12 between the first position and the second position.

[0108] The above-mentioned guide portion 70 may be provided in the example shown in Fig. 9A and Fig. 9B. The configuration of the guide portion 70 and the back support 45 interacting with the guide portion 70 may be the same as that described above. That is, in the example shown in Fig. 9A and Fig. 9B, the guide portion 70 is held at a fixed position in the vertical and front-rear directions. Therefore, the portion of the back support 45 supported by the guide portion 70 passes through a fixed position in the vertical and front-rear directions where the guide portion 70 is disposed during the reclining operation of the back support 45. As a result, the seat support 41 moves in the vertical direction relative to the main frame 12 while being guided by the rail portion 60 together with the back support 45 in conjunction with the reclining operation of the back support 45.

[0109] In the stroller 10 shown in Figs. 9A and 9B, the configuration other than the rail portion 60 and the running portion 61 may be the same as that of the stroller 10 described above with reference to Figs. 1 to 8B.

[0110] 9A and 9B, the rails 60 extend in the vertical direction. This reduces the vertical shift in the center of gravity caused by the reclining action of the back support 45. This improves the maneuverability of the stroller 10 when turning or climbing up a step.

[0111] In this specific example, as shown in Fig. 9A and Fig. 9B, when the back support 45 is raised relative to the seat support 41, the seat support 41 is located lower in the vertical direction. As shown in Fig. 9A, when the back support 45 is reclined relative to the seat support 41, the seat support 41 is located upper in the vertical direction. According to this example, it is possible to effectively reduce the change in the position of the center of gravity of the baby in the vertical direction that accompanies the reclining action.

[0112] For example, when the back support 45 is raised up relative to the seat support 41, the head and upper body of the baby riding in the stroller 10 are located upward in the vertical direction. As shown in Fig. 9B, when the back support 45 is raised up, the seat support 41 and the back support 45 can be lowered downward in the vertical direction to lower the center of gravity of the baby. This improves the maneuverability of the stroller 10 when turning or climbing over a step.

[0113] When the back support 45 is reclined relative to the seat support 41, the head and upper body of the baby riding in the stroller 10 are positioned downward in the vertical direction and are close to the running surface of the stroller 10. As shown in Fig. 9A, when the back support 45 is reclined, the position of the baby can be raised by raising the seat support 41 and the back support 45 upward in the vertical direction. This allows the baby to be separated from the running surface of the stroller 10 and reduces the effects of heat, dust, etc. from the running surface on the baby.

[0114] Furthermore, for infants who are still a few months old, there is a tendency to use the stroller 10 with the back support 45 reclined. With the back support 45 reclined, the seat support 41 and the back support 45 are positioned at the top in the vertical direction, so that it is easy to load and unload an infant onto and from the seat support unit 40.

[0115] 9A and 9B, the main frame 12 has a rail portion 60, and the seat support body 41 of the seat support unit 40 has a running portion 61 that moves on the rail portion 60. However, the present embodiment is not limited to this example. The back support body 45 may have at least a part of the running portion 61.

[0116] 9C and 9D, the seat support unit 40 may have a rail portion 60, and the main frame 12 may have a running portion 61 that moves relative to the rail portion 60 along the longitudinal direction of the rail portion 60. As an example shown in FIG. 9C and FIG. 9D, the rail portion 60 may be attached to the side portion 43 of the front frame member 42 of the seat support 41. The running portion 61 may be fixed to the third link member L3 and slide on the rail portion 60 that hangs down from the side portion 43 of the seat support 41. Even with this modification, as shown in FIG. 9C, when the back support 45 is tilted relative to the seat support 41, the seat support 41 and the back support 45 move upward in the vertical direction. As shown in FIG. 9D, when the back support 45 is raised relative to the seat support 41, the seat support 41 and the back support 45 move downward in the vertical direction. This modified example also has the above-mentioned operational effect, that is, it is possible to reduce the change in the center of gravity position that occurs when the back support 45 is reclined, thereby improving the maneuverability of the stroller 10.

[0117] In the stroller 10 shown in Figs. 9C and 9D, the configuration other than the rail portion 60 and the running portion 61 may be the same as that of the stroller 10 described above with reference to Figs. 1 to 8B.

[0118] As another modified example, the rail portion 60 may be inclined in the front-rear direction and the up-down direction. For example, in the example shown in Fig. 8A and Fig. 8B, the rail portion 60 (third link member L3) may be inclined in the front-rear direction so that it is located in the front in the front-rear direction, upper in the up-down direction, and located in the rear in the front-rear direction, lower in the up-down direction. Similarly, in the example shown in Fig. 9A and Fig. 9B, the rail portion 60 may be inclined in the up-down direction so that it is located in the front in the front-rear direction, upper in the up-down direction, and located in the rear in the up-down direction, lower in the up-down direction. According to these examples, when the seat support 45 stands up relative to the seat support 41, the seat support 41 and the back support 45 are located lower in the up-down direction and rear in the front-rear direction. When the seat support 45 is in a state where it is reclined relative to the seat support 41, the seat support 41 and the back support 45 are located upper in the up-down direction and forward in the front-rear direction. According to these examples, the above-mentioned operational effects can be made more remarkable. For example, the change in the center of gravity position that accompanies the reclining movement of the back support 45 can be more effectively reduced, improving the maneuverability of the stroller 10.

[0119] In the embodiment described above, the stroller 10 has a stroller body 11. The stroller body 11 has a body frame 12 and a seat support unit 40 supported by the body frame 12. The seat support unit 40 has a seat support 41 supported by the body frame 12 and a back support 45 that can be reclined relative to the seat support 41. One of the body frame 12 and the seat support unit 40 has a rail portion 60 that guides the relative movement of the seat support 41 and the body frame 45. The seat support 41 moves relative to the body frame 12 while being guided by the rail portion 60 in conjunction with the reclining movement of the back support 45. According to this embodiment, it is possible to reduce the change in the center of gravity of the baby riding in the stroller 10 that accompanies the reclining movement of the back support 45. This makes it possible to suppress the change in the operability of the stroller 10.

[0120] In the specific example of the embodiment described above, the rail portion 60 guides the movement in the front-rear direction of the seat support 41. According to this specific example, the change in the center of gravity position in the front-rear direction that accompanies the reclining movement of the back support 45 is reduced, thereby suppressing the change in the maneuverability of the stroller 10. This improves the maneuverability of the stroller 10 when turning, climbing up a step, etc.

[0121] In the specific example of the embodiment described above, when the back support 45 is in an upright position, the seat support 41 is located rearward in the front-rear direction. When the back support 45 is in a reclined position, the seat support 41 is located forward in the front-rear direction. According to this specific example, the change in the center of gravity in the front-rear direction caused by the reclining action of the back support 45 is reduced, thereby suppressing the change in the operability of the stroller 10. In particular, when the back support 45 is in an upright position, the seat support 41 is located rearward in the front-rear direction, thereby improving the operability of the stroller 10. When the back support 45 is in a reclined position, the seat support 41 is located forward in the front-rear direction, thereby improving the operability of the stroller 10 and allowing the baby to be easily loaded and unloaded from the stroller 10.

[0122] In the specific example of the embodiment described above, the rail portion 60 guides the vertical movement of the seat support 41. According to this specific example, the change in the vertical center of gravity position that accompanies the reclining movement of the back support 45 can be reduced, thereby suppressing changes in the maneuverability of the stroller 10. This can improve the maneuverability of the stroller 10 when turning, climbing up steps, etc.

[0123] In the specific example of the embodiment described above, when the back support 45 is in an upright position, the seat support 41 is located at a lower position in the vertical direction. When the back support 45 is in a reclined position, the seat support 41 is located at a higher position in the vertical direction. According to this specific example, the change in the center of gravity in the vertical direction caused by the reclining action of the back support 45 is reduced, thereby suppressing the change in the operability of the stroller 10. In particular, when the back support 45 is in an upright position, the seat support 41 is located at a lower position in the vertical direction, thereby improving the operability of the stroller 10. When the back support 45 is in a reclined position, the seat support 41 is located at an upper position in the vertical direction, thereby making it easy to load and unload an infant on the stroller 10, and reducing the effects of heat, dust, etc., from the running surface on the infant.

[0124] In the specific example of the embodiment described above, the stroller body 11 further has a guide portion 70 provided on the body frame 12. During the reclining operation, the back support 45 is supported by the guide portion 70, and the seat support 41 is supported by the body frame 12 via the rail portion 60. According to this specific example, the simple configuration using the guide portion 70 allows the seat support 41 to be moved stably in conjunction with the reclining operation of the back support 45.

[0125] In the specific example of the embodiment described above, the guide portion 70 is attached to the main body frame 12 so as to be rotatable about an axis along the width direction. According to this specific example, the state in which the back support 45 is supported by the guide portion 70 can be stably maintained during the reclining motion of the back support 45. In addition, the back support 45 and the guide portion 70 can be smoothly moved relative to each other. As a result, the seat support 41 can be stably moved in conjunction with the reclining motion of the back support 45.

[0126] In the specific example of the embodiment described above, the guide portion 70 has a recess (guide recess) 72 that receives the back support 45. According to this specific example, the back support 45 can be stably maintained in a state where it is supported by the guide portion 70 during the reclining motion of the back support 45. In addition, the back support 45 and the guide portion 70 can be smoothly moved relative to each other. As a result, the seat support 41 can be stably moved in conjunction with the reclining motion of the back support 45.

[0127] In the specific example of the embodiment described above, the back support 45 has a recess (back recess) 79 or a protrusion (back protrusion) 78. The guide portion 70 has a protrusion (guide protrusion) 73 inserted into the recess (back recess) 79 of the back support 45 or a recess (guide recess) 72 that receives the protrusion (back protrusion) 78 of the back support 45. During the reclining operation of the back support 45, the guide portion 70 slides on the back support 45. According to this specific example, the back support 45 can be stably maintained in a state in which it is supported by the guide portion 70 during the reclining operation of the back support 45. In addition, the back support 45 and the guide portion 70 can be smoothly moved relative to each other. As a result, the seat support 41 can be stably moved in conjunction with the reclining operation of the back support 45.

[0128] In the specific example of the embodiment described above, the guide portion 70 has a convex portion (guide convex portion) 73 protruding from the main body frame 12. During the reclining operation of the back support 45, the convex portion (guide convex portion) 73 of the guide portion 70 slides on the back support 45. According to this specific example, the state in which the back support 45 is supported by the guide portion 70 can be stably maintained during the reclining operation of the back support 45. In addition, the back support 45 and the guide portion 70 can be smoothly moved relative to each other. As a result, the seat support 41 can be stably moved in conjunction with the reclining operation of the back support 45.

[0129] In the specific example of the embodiment described above, the main body frame 12 has link members that configure the main body frame 12 to be foldable and unfoldable. One of the link members configures the rail portion 60. According to this specific example, the link members that configure the main body frame 12 to be foldable can be used as the rail member 60 that guides the relative movement of the seat support body 41 and the main body frame 12. Since it is possible to avoid using a dedicated member that configures the rail portion 60, it is possible to prevent the stroller 10 from becoming complicated and large and heavy.

[0130] In the specific example of the embodiment described above, the main body frame 12 has a first link member L1, a front leg 14 connected to the first link member L1 and rotatable relative to the first link member L1, a rear leg 16 connected to the first link member L1 and rotatable relative to the first link member L1, a second link member L2 connected to the first link member L1 and rotatable relative to the first link member L1, and a third link member L3 provided between the front leg 14 and the second link member L2 and rotatable relative to the front leg 14 and the second link member L2. The third link member L3 constitutes the rail portion 60. According to this specific example, the link member that allows the main body frame 12 to be folded can be used as the rail member 60 that guides the relative movement of the seat support 41 and the main body frame 12. Since it is possible to avoid the use of a dedicated member that constitutes the rail portion 60, it is possible to suppress the complexity and weight of the stroller 10.

[0131] In the specific example of the embodiment described above, the main body frame 12 has a first link member L1, a front leg 14 connected to the first link member L1 and rotatable relative to the first link member L1, a rear leg 16 connected to the first link member L1 and rotatable relative to the first link member L1, a second link member L2 connected to the first link member L1 and rotatable relative to the first link member L1, and a third link member L3 provided between the front leg 14 and the second link member L2 and rotatable relative to the front leg 14 and the second link member L2. The guide portion 70 is provided on the second link member L2. According to this specific example, the guide portion 70 can be installed near the back support 45 using a link member that allows the main body frame 12 to be folded. Therefore, the guide portion 70 can be prevented from becoming large. In addition, the use of a dedicated member for connecting the guide portion 70 to the main body frame 12 can be avoided. As a result, the stroller can be prevented from becoming complicated and large and heavy.

[0132] In the specific example of the embodiment described above, the seat support unit 40 has a canopy support 57. The canopy support 57 moves relative to the main body frame 12 together with the seat support 41. According to this specific example, even if the relative position of the seat support 41 to the main body frame 12 changes, the positional relationship between the seat support 41 and the canopy support 57 (and therefore the canopy) can be maintained. Therefore, even if the relative position of the seat support 41 to the main body frame 12 changes, the canopy can be maintained in an appropriate position with respect to the baby on the seat support unit 40.

[0133] In the specific example of the embodiment described above, the seat support unit 40 has a guard material 55. The guard material 55 moves relative to the main body frame 12 together with the seat support 41. According to this specific example, even if the relative position between the seat support 41 and the main body frame 12 changes, the relative position between the seat support 41 and the guard material 55 can be maintained. Therefore, even if the relative position of the seat support 41 with respect to the main body frame 12 changes, the guard material 55 can be maintained in an appropriate position with respect to the baby on the seat support unit 40.

[0134] In the specific example of the embodiment described above, the back support 45 is movable together with the seat support 41 relative to the main body frame 12. According to such a stroller 10, even if the relative position of the seat support 41 to the main body frame 12 changes, the relative positions of the seat support 41 and the back support 45 can be maintained.

[0135] Although one embodiment has been described with reference to a specific example, the above-mentioned specific example does not limit the embodiment. The above-mentioned embodiment can be embodied in various other specific examples, and various omissions, substitutions, changes, additions, etc. can be made without departing from the spirit of the embodiment.

[0136] In the above-described embodiment, an example has been shown in which the handle 30 is swingable relative to the main body frame 12. However, this embodiment is not limited to this example. The member constituting the second link member L2 may extend upward to form the handle. In other words, a handle separate from the second link member L2 may be omitted. The second link member L2 may be formed as a part of the handle. [Explanation of symbols]

[0137] 10: stroller, 11: stroller body, 12: body frame, 14: front legs, 16: rear legs, 18: front wheels, 18a: front wheel holding member, 18b: front wheel rotation shaft, 18c: front wheel swivel shaft, 19: rear wheels, 19a: rear wheel holding member, 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, 42: front frame member, 43: side portion, 44: front end portion, 45: back support, 46: rear frame member, 47: side portion, 48: rear end portion, 49: reclining belt, 50: side support portion, 51: side frame member, 52: connecting frame member, 54: guard support, 55: guard material, 57: hood support, 58: hood support material, 59: hood bone, 60: rail portion, 61: running portion, 63: first support material, 63a: first base portion, 63b: first connecting portion, 63c: first connecting portion, 64: second support material, 64a: second base portion, 64b: second connecting portion, 64c: second connecting portion, 70: guide portion, 71: guide wall portion, 72: guide recess, 73: guide protrusion, 73a: base end portion, 73b: tip portion, 76: connecting arm portion, 77: linear guide, 78: back protrusion, 79: back recess, L1: first link member, L2: second link member, L3: third link member, L4: fourth link member, X40: rotation axis, X70: rotation axis, W70: width

Claims

1. Equipped with a stroller body, The stroller body includes a body frame and a seat support unit supported by the body frame, The seat support unit has a seat support supported by the main body frame and a back support capable of reclining relative to the seat support, One of the main body frame and the seat support unit has a rail portion that guides relative movement between the seat support body and the main body frame, The seat support moves relatively to the main body frame while being guided by the rail portion in conjunction with the reclining movement of the back support.

2. The stroller according to claim 1 , wherein the rail portion guides the movement of the seat support in the front-rear direction.

3. The seat support comprises: When the back support is in an upright state, the back support is located at the rear in the front-rear direction, 3. The stroller according to claim 2, wherein the back support is located forward in the front-to-rear direction when in the folded-down state.

4. The stroller according to claim 1 , wherein the rail portion guides the movement of the seat support in the up and down direction.

5. The seat support comprises: When the back support is in an upright position, the back support is located at a lower position in the up-down direction, 5. The stroller according to claim 4, wherein the back support is positioned at an upper position in the vertical direction when the stroller is in a reclined position.

6. The stroller body has a guide portion provided on the body frame, 2. The stroller of claim 1, wherein the back support is supported by the guide portion during reclining movement of the back support.

7. The stroller according to claim 6, wherein the guide portion is attached to the main body frame so as to be rotatable about an axis extending along the width direction.

8. 7. A pram as claimed in claim 6, wherein the guide portion has a recess for receiving the back support.

9. The back support has a concave or convex portion, The guide portion has a protrusion inserted into the recess of the back support or a recess that receives the protrusion of the back support, 7. The stroller of claim 6, wherein the guide portion slides on the back support during the reclining movement.

10. The guide portion has a protrusion protruding from the main body frame, 7. The stroller of claim 6, wherein the protrusion of the guide portion slides on the back support during the reclining movement.

11. The main body frame has a link member that configures the main body frame to be foldable and unfoldable, The stroller according to claim 1 , wherein any one of the link members constitutes the rail portion.

12. 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; and 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, The stroller according to claim 1 , wherein the third link member constitutes the rail portion.

13. 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; and 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, The stroller according to claim 6, wherein the guide portion is provided on the second link member.

14. The seat support unit has a top support, 2. The stroller according to claim 1, wherein the top support moves together with the seat support relative to the main body frame.

15. The seat support unit has a guard material, The stroller according to claim 1 , wherein the guard material moves together with the seat support relative to the main body frame.

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