Baby carriage

Abstract

The invention provides a baby carriage (10). The baby carriage (10) is provided with a baby carriage main body (11). The baby carriage main body (11) has a main body frame (12) and a seat support unit (40) supported by the main body frame. The seat support unit has a seat support body (41) supported by the main body frame, and a back support body (45) tiltable with respect to the seat support body. One of the main body frame and the seat support unit has a rail portion (60) that guides relative movement between the seat support body and the main body frame. The seat support moves relative to the main body frame while being guided by the rail section in conjunction with the tilting operation of the back support.

Description

Technical Field

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

[0002] A baby stroller used for taking infants and young children out is becoming widely popular (for example, Patent Document 1). The baby stroller includes a main frame and a seat support unit. The main frame supports the seat support unit. The seat support unit supports a cushion.

[0003] The seat support unit includes a seat support body and a back support body. The back support body can swing relative to the seat support body. The back support body tilts relative to the seat support body. When the back support body is erected from the seat support body, the infant sits on the cushion supported by the seat support unit. When the back support body is fallen from the seat support body, the infant lies horizontally on the cushion.

[0004] In response to the tilting movement of the back support body, the center of gravity of the infant on the baby stroller moves. Therefore, the operability of the baby stroller also changes with the tilting movement of the back support body. In this way, if the operability changes, the user may feel that it is difficult to operate the baby stroller.

[0005] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Publication No. 2018-202982 Summary of the invention

[0006] Technical issues The present invention has been made in view of the above problems, and an object of the present invention is to suppress changes in operability of a baby stroller due to a tilting operation.

[0007] Technical Solution [1] The baby stroller comprises a baby stroller main body, The baby carriage body includes a main body frame and a seat support unit supported by the main body frame. The seat support unit includes a seat support body supported by the main frame and a back support body that is tiltable relative to the seat support body. One of the main frame and the seat support unit has a rail portion for guiding relative movement between the seat support body and the main frame. The seat support body is linked with the tilting movement of the back support body, and moves relatively with respect to the main body frame while being guided by the rail portion.

[0008] [2] According to the stroller described in [1], the rail portion guides the seat support body to move in the front-rear direction.

[0009] [3] According to the stroller described in [1] or [2], when the back support body is in an upright state, the seat support body is located rearward in the front-rear direction. When the back support body is in a fallen state, the seat support body is located forward in the front-rear direction.

[0010] [4] According to the baby stroller described in any one of [1] to [3], the rail portion guides the seat support body to move in the vertical direction.

[0011] [5] According to the stroller described in [4], when the back support body is in an upright state, the seat support body is located at the lower side in the vertical direction. When the back support body is in a fallen state, the seat support body is located upward in the up-down direction.

[0012] [6] According to any one of [1] to [5], the stroller body has a guide portion provided on the body frame. During the tilting operation, the back support body is supported by the guide portion.

[0013] [7] According to the baby carriage described in [6], the guide portion is mounted on the main frame in a manner that allows rotation around an axis line along the width direction.

[0014] [8] According to the stroller described in [6] or [7], the guide portion has a recessed portion for accommodating the back support body.

[0015] [9] According to any one of [6] to [8], the baby stroller, wherein the back support body has a concave portion or a convex portion, The guide portion has a convex portion inserted into the concave portion of the back support body or a concave portion that accommodates the convex portion of the back support body. During the tilting motion, the guide portion slides on the back support body.

[0016]

[10] According to the baby stroller described in any one of [6] to [9], the guide portion has a convex portion protruding from the main frame, During the tilting operation, the convex portion of the guide portion slides on the back support body.

[0017]

[11] According to the baby stroller described in any one of [1] to

[10] , the main frame has a link member that allows the main frame to be foldable and unfoldable. Any one of the link members constitutes the rail portion.

[0018]

[12] According to any one of [1] to

[11] , the baby carriage, the main frame has: a first connecting rod 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, which is disposed between the front leg and the second link member and is rotatable relative to the front leg and the second link member, The third link member constitutes the rail portion.

[0019]

[13] According to any one of [6] to

[10] , the baby carriage, the main frame has: a first connecting rod 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, which is disposed between the front leg and the second link member and is rotatable relative to the front leg and the second link member, The guide portion is provided on the second link member.

[0020]

[14] According to any one of [1] to

[13] , the baby stroller, wherein the seat support unit has a canopy support body. The canopy support body moves relatively to the main body frame together with the seat support body.

[0021]

[15] According to any one of [1] to

[14] , the baby stroller, wherein the seat support unit has a guard member. The guard moves relatively to the main frame together with the seat support.

[0022] According to the present invention, it is possible to suppress a change in operability of the baby stroller due to a tilting motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a diagram for explaining one embodiment of the present invention and is a perspective view for explaining the overall structure of a baby stroller.

[0024] Figure 2 The handle is shown in the state of facing the push position. Figure 1 A side view of the stroller is shown.

[0025] Figure 3 is shown in the folded state Figure 1 A side view of the stroller is shown.

[0026] Figure 4 Viewed from the inside in the width direction Figure 1 A longitudinal section through the right half of the stroller is shown.

[0027] Figure 5 It is shown that it can be included in Figure 1 An enlarged perspective view of an example of a guide portion in the baby stroller shown.

[0028] Figure 6 It is used to illustrate Figure 5 The diagram showing the functions of the guide portion and the back support body is a partially enlarged diagram showing an example of a baby stroller.

[0029] Fig. 7A is with Figure 6 The corresponding drawings are drawings showing another example of the guide portion and the back support body.

[0030] Figure 7B is with Figure 6 The corresponding drawings are drawings showing another example of the guide portion and the back support body.

[0031] Fig. 8A It is used to illustrate Figure 1 The figure showing the function of the baby carriage is a side view schematically showing the baby carriage.

[0032] Figure 8B It is used to illustrate Figure 1 The figure showing the function of the baby carriage is a side view schematically showing the baby carriage.

[0033] Figure 8C is with Fig. 8A The corresponding figure shows a modified example of the baby carriage.

[0034] Fig.8D is with Figure 8B The corresponding figure shows Figure 8C Figure of the stroller shown.

[0035] Fig.9A is with Fig. 8A The corresponding drawings show another modified example of the baby carriage.

[0036] Fig. 9B is with Figure 8B The corresponding figure shows Fig.9A Figure of the stroller shown.

[0037] Fig. 9C is with Figure 8C The corresponding drawings show still another modified example of the baby stroller.

[0038] Fig.9D is with Fig.8D The corresponding figure shows Fig. 9C Figure of the stroller shown.

[0039] Explanation of symbols 10: Stroller, 11: Stroller body, 12: Main body frame, 14: Front legs, 16: Rear legs, 18: Front wheels, 18a: Front wheel holding member, 18b: Front wheel rotation axis, 18c: Front wheel rotation axis, 19: Rear wheel, 19a: Rear wheel holding member, 19b: Rear wheel rotation axis, 19c: Rear wheel rotation axis, 20: Axis member, 30: Handle, 32: Handle extension, 40: Seat support unit, 41: Seat support body, 42: Front frame member, 43: Side portion, 44: Front end portion, 45: Back support body, 46: Rear frame member, 47: Side portion, 48: Rear end portion, 49: Tilt belt, 50: Side support portion, 51: Side frame member, 52: Connecting frame member, 54: Guard support body, 55: Guard , 57: canopy support body, 58: canopy support member, 59: canopy frame, 60: rail portion, 61: running portion, 63: first support member, 63a: first base portion, 63b: first connecting portion, 63c: first connecting portion, 64: second support member, 64a: second base portion, 64b: second connecting portion, 64c: second connecting portion, 70: guide portion, 71: guide wall portion, 72: guide recessed portion, 73: guide protrusion, 73a: base end portion, 73b: front end portion, 76: connecting arm portion, 77: linear guide member, 78: back protrusion, 79: back concave portion, L1: first link member, L2: second link member, L3: third link member, L4: fourth link member, X40: rotation axis, X70: rotation axis, W70: width DETAILED DESCRIPTION

[0040] An embodiment of the present invention will be described with reference to the drawings.

[0041] Figure 1 to Figure 9D FIG. 1 is a diagram for explaining an embodiment of a baby carriage of the present invention. Figure 1 to Figure 4 , the overall structure of a specific example of a baby stroller is shown.

[0042] The baby carriage 10 of this embodiment includes a baby carriage body 11. Figure 1 As shown, the stroller body 11 shown in the figure has a generally symmetrical structure with the plane along the front-back direction and the up-down direction as the center. The stroller body 11 has a main frame 12 and a seat support unit 40 supported by the main frame 12. The seat support unit 40 has a seat support body 41 supported by the main frame 12 and a back support body 45 that can be tilted relative to the seat support body 41.

[0043] The stroller 10 of this embodiment has been studied to suppress the change in operability of the stroller caused by the tilting action. Specifically, one of the main frame 12 and the seat support unit 40 includes a track portion 60 that guides the relative movement between the seat support body 41 and the main frame 12. The seat support body 41 and the back support body 45 are linked to the tilting action, and are guided by the track portion 60 while moving relative to the main frame 12. As a result, the change in the center of gravity position of the infant riding in the stroller 10 caused by the tilting action is reduced, and the change in operability of the stroller 10 is suppressed.

[0044] In addition, in this specification, unless otherwise specified, the terms "front", "rear", "up", "down", "front-rear direction", and "up-down direction" with respect to the stroller and its components refer to the "front", "rear", "up", "down", "front-rear direction", and "up-down direction" based on the infant or young child riding in the stroller and its components in the unfolded state. More specifically, the "front-rear direction" refers to the direction in which the stroller and its components are placed. Figure 1 The direction connecting the lower left and upper right of the paper is equivalent to Figure 2 In addition, unless otherwise specified, "front" means the side that the infant is facing. Figure 1 The lower left side of the paper and Figure 2The left side of the paper in the figure is the front side. On the other hand, the "up and down direction" refers to the direction perpendicular to the running surface of the baby carriage. Therefore, when the running surface is a horizontal plane, the "up and down direction" refers to the vertical direction. In addition, the "lateral" refers to the width direction, and is a direction perpendicular to both the "front and rear direction" and the "up and down direction". Furthermore, the "back side" means the side opposite to the side facing the infant riding in the baby carriage 10. Therefore, the "back side" is usually the back side.

[0045] In this specification, the inner side or inner direction in the width direction refers to the side close to the center of the stroller body 11 in the width direction. On the other hand, the outer side or outer direction in the width direction refers to the side far from the center of the stroller body 11 in the width direction.

[0046] Hereinafter, the present embodiment will be described with reference to specific examples shown in the drawings.

[0047] The baby carriage 10 includes a baby carriage body 11 and a cushion seat supported by a seat support unit 40. An infant riding in the baby carriage 10 sits on the cushion seat.

[0048] In the illustrated stroller 10, the stroller body 11 further includes a handle 30 mounted on the main frame 12. The handle 30 can be swung in the front-rear direction relative to the main frame 12. Figure 1 The rear-facing push position shown is similar to Figure 2 When the handle 30 is placed in the back-to-back pushing position, the operator (guardian) holds the handle 30 from the back side of the infant to operate the stroller 10. At this time, the front leg 14 side of the stroller 10 is at the front of the travel direction. When the handle 30 is placed in the face-to-back pushing position, the operator holds the handle 30 from the side facing the infant to operate the stroller 10. At this time, the rear leg 16 side of the stroller 10 is at the front of the travel direction.

[0049] In the specific example shown in the figure, the stroller body 11 is foldable. Hereinafter, each element constituting the stroller body 11 will be described in further detail.

[0050] like Figure 1As shown, the main frame 12 has a pair of front legs 14 respectively arranged on the left and right, and a pair of rear legs 16 respectively arranged on the left and right. The main frame 12 also has a first link component L1, a second link component L2, a third link component L3, and a fourth link component L4 respectively arranged on the left and right. The front legs 14, the rear legs 16, and the first link component L1 to the fourth link component L4 function as link components that make the main frame 12 foldable and unfoldable. In the example shown in the figure, the first link component L1 also functions as an armrest. That is, the first link component L1 is constituted by an armrest.

[0051] 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 wheel 18 and the rear wheel 19 are held by a front wheel holding member 18a connected to the lower end of the front wheel 18 and a rear wheel holding member 19a connected to the lower end of the rear wheel 19, respectively. The front wheel holding member 18a and the front wheel 18 constitute a caster, and are rotatable around a front wheel rotation axis 18b extending in the horizontal direction, and are rotatable around a front wheel rotation axis 18c extending in the vertical direction. In addition, the rear wheel holding member 19a and the rear wheel 19 also constitute a caster, and are rotatable around a rear wheel rotation axis 19b extending in the horizontal direction, and are rotatable around a rear wheel rotation axis 19c extending in the vertical direction.

[0052] like Figure 2 As shown in FIG. 1 , the upper end portion of the front leg 14 is connected to the front portion of the first link member L1 disposed on the corresponding side (left or right) in a rotatable (swingable) manner. The upper end portion of the rear leg 16 is connected to the front portion of the first link member L1 disposed on the corresponding side (left or right) in a rotatable (swingable) manner. Figure 1 As shown, the upper portion of the second link member L2 is connected to the rear portion of the first link member L1 arranged on the corresponding side (left or right) in a rotatable (swingable) manner. In the example shown in the figure, the second link member L2 is connected to the rear portion of the first link member L1 in a rotatable (swingable) manner at its upper portion. The second link member L2 is supported by the rear legs 16 when the main frame 12 is deployed.

[0053] The third link component L3 is provided between the front leg 14 and the second link component L2. The third link component L3 is connected to the middle portion of the front leg 14 at its front portion. The third link component L3 can rotate relative to the front leg 14 around the rotation axis extending in the width direction. Furthermore, the third link component L3 is connected to the lower portion of the second link component L2 at its rear portion. The third link component L3 can rotate relative to the second link component L2 around the rotation axis extending in the width direction.

[0054] like Figure 2 As shown, the third link member L3 is connected to the second link member L2 via the shaft member 20 extending in the width direction. In addition, the third link member L3 is connected to the front leg 14 via the 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 leg 14 and / or the second link member L2. In the example shown in the figure, the third link member L3 extends substantially linearly in the front-rear direction in the unfolded state of the stroller 10.

[0055] like Figure 1 As shown, in the example shown in the figure, the fourth link component L4 is connected to the rear leg 16 in a rotatable manner. The fourth link component L4 is connected to the middle part of the rear leg 16 in a rotatable manner at its lower part. The fourth link component L4 is connected to the second link component L2 and the third link component L3 in a rotatable manner. In the example shown in the figure, the second link component L2, the third link component L3, and the fourth link component L4 are connected to each other in a rotatable manner using the same shaft component 20. The shaft component 20 penetrates the second link component L2, the fourth link component L4, and the third link component L3. With this structure, the second link component L2, the third link component L3, and the fourth link component L4 can rotate with each other around an axis that coincides with the central axis of the shaft component 20.

[0056] In addition, if Figure 1 As shown in FIG. 1 , the main frame 12 includes a front link 15 connecting a pair of front legs 14 and a rear link 17 connecting a pair of rear legs 16 as components extending in the lateral direction. The front link 15 functions as a footrest. In addition, a central link 21 is provided between the pair of third link members L3. The front link 15, the rear link 17, and the central link 21 can suppress the lateral deformation of the baby carriage 10.

[0057] In the example shown in the figure, the handle 30 can be swung forward and backward relative to the main frame 12 as described above. The handle 30 can be in the back-to-push position (see Figure 1 ) and facing the push position (refer to Figure 2 ). In the illustrated example, the handle 30 is tilted relative to the vertical direction and extends upwardly to the rear in the back-to-push position. The handle 30 is tilted relative to the vertical direction and extends upwardly to the front in the facing-to-push position.

[0058] In the example shown in the drawings, the handle 30 includes a handle body 31 swingably mounted on the main body frame 12 , and a holding body 35 provided on the handle body 31 .

[0059] like Figure 1As shown, the handle body 31 has a generally U-shaped shape. The handle body 31 is connected to the main frame 12 at both ends of the U-shape in a rotatable (swingable) manner. The handle body 31 includes a pair of handle extensions 32 extending approximately parallel to each other, and an intermediate portion 33 connecting the pair of handle extensions 32. The pair of handle extensions 32 are arranged on the outside of the main frame 12 in the width direction. Each handle extension 32 is rotatably connected to the main frame 12 at its lower end. The intermediate portion 33 is a grip held by the operator (guardian).

[0060] In the example shown in the figure, the handle body 31 is connected to the main frame 12 in a rotatable manner 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 can rotate relative to each other around the same axis formed by the shaft member 20. By making the holding body 35 provided on the handle 30 and the first holding member 36 (see FIG. 2 ) of the main frame 12 rotate, the handle body 31 can rotate relative to each other. Figure 2 ) is engaged, so that the handle 30 can be kept Figure 1 By making the holding body 35 provided on the handle 30 and the second holding member 37 (refer to Figure 1 ) is engaged, so that the handle 30 can be kept Figure 2 Shown facing push position.

[0061] The stroller body 11 having the above structure can be folded by relatively rotating the components. Specifically, the second link member L2 is temporarily lifted upward and backward using the handle 30 disposed at the back-to-push position, and then pressed downward to fold the second link member L2 in the same direction as the stroller body 11. Figure 2 Similarly, when viewed from the side, the fourth link member L4 is rotated clockwise relative to the rear leg 16. Figure 2 Similarly, when viewed from the side, the first link member L1 and the third link member L3 rotate clockwise relative to the second link member L2. By doing so, the second link member L2 and the front leg 14 are brought closer to each other while being kept substantially parallel to each other when viewed from the side, and the position of the handle 30 relative to the main frame 12 is lowered. As described above, Figure 3 As shown, the stroller body 11 can be folded. Figure 3 In the folded state, the dimensions of the stroller 10 along the front-rear direction and the up-down direction can be made compact. On the other hand, to unfold the stroller body 11 from the folded state, the procedure is reversed from the folding operation described above.

[0062] The stroller body 11 may have a state-holding mechanism (not shown) for limiting the relative rotation of the two components. By operating the state-holding mechanism, the stroller body 11 can be folded. In the example shown in the figure, the handle 30 has a remote control device 38 connected to the state-holding mechanism. Figure 1 As shown, the remote control device 38 is provided in the middle portion 33 of the handle body 31. By operating the remote control device 38, the state holding mechanism is actuated, and the stroller body 11 can be folded.

[0063] The seat support unit 40 supports a cushion (not shown) for the infant to sit on. Figure 1 and Figure 4 As shown in FIG. 1 , the seat support unit 40 includes a seat support 41 and a back support 45. The seat support 41 faces the buttocks of the infant riding in the stroller 10. The back support 45 faces the back of the infant. Figure 1 As shown, the seat support unit 40 is arranged inside the width direction of the main body frame 12. More specifically, the seat support unit 40 is arranged between the left and right front legs 14 and the rear legs 16.

[0064] like Figure 1 As shown, the seat support body 41 has a front frame member 42. The front frame member 42 is a frame member formed in a roughly U-shape. The front frame member 42 has a pair of side portions 43 extending in the front-to-back 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 body 41 may have a cloth (not shown) stretched on the front frame member 42 and dividing the seat surface. Alternatively, the seat support body 41 may have a seat plate (not shown) supported from below by the front frame member 42 and dividing the seat surface. The seat plate is a plate-shaped member formed using resin and / or metal. It should be noted that when the seat support body 41 includes a seat plate, the seat support body 41 may not include the front frame member 42.

[0065] As described later, the seat support 41 is held by the third link member L3. Thus, when the stroller body 11 is folded, the seat support 41 can be rotated along with the rotation of the third link member L3. When the stroller body 11 is folded, the angle of the seat support 41 relative to the second link member L2 can be automatically reduced, and the front-to-back dimension of the stroller 10 in the folded state can be reduced. In other words, when the stroller 10 in the folded state is viewed from the side, the seat support 41 can be prevented from protruding further forward than the main frame 12.

[0066] like Figure 1As shown, the back support body 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 example shown in the figure, the back support body 45 is connected to the seat support body 41. More specifically, the rear frame member 46 extends upward or backward from the rear end of the front frame member 42. The back support body 45 can rotate relative to the seat support body 41 around the 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 in a manner that can rotate around the rotation axis X40 extending in the width direction. By rotating the back support body 45 relative to the seat support body 41, the back support body 45 can be tilted relative to the seat support body 41. The back support body 45 may further include a cloth-like member and / or a plate-like member supported by the rear frame member 46 .

[0067] like Figure 2 As shown in FIG. 1 , the back support body 45 is supported from behind by an inclined belt 49, and both ends of the inclined belt 49 are connected to the main frame 12. This prevents the back support body 45 from falling backward. The length of the inclined belt 49 is variable. By adjusting the length of the inclined belt 49, the back support body 45 can be tilted. It should be noted that the inclined belt 49 is only shown in FIG. Figure 2 In other figures, the illustration of the inclined belt 49 is omitted.

[0068] Furthermore, if Figure 1 and Figure 4 As shown, the seat support unit 40 includes a pair of side support portions 50 extending in the vertical direction and a side frame member 51. The side support portions 50 extend upward above the side portions 47 of the back support body 45. In the example shown in the figure, the lower end portions of the side support portions 50 are fixed to the seat support body 41.

[0069] like Figure 1 As shown, the side frame member 51 is a frame member formed in a substantially U-shape. The side frame member 51 is connected to the upper end of the side support portion 50 at both ends of the U. The side frame member 51 is connected to the side support portion 50 so as to be rotatable around a rotation axis parallel to the width direction.

[0070] like Figure 1 and Figure 4As shown, a pair of connecting frame members 52 are provided between the side frame member 51 and the rear frame member 46. The pair of connecting frame members 52 are arranged to be separated from each other in the width direction. The connecting frame member 52 can rotate relative to the rear frame member 46 and the side frame member 51. The connecting frame member 52 functions as a link member, and swings the other one along with the swing of one of the rear frame member 46 and the side frame member 51. In addition, the connecting frame member 52 forms a wall portion located behind the head of the infant when the back support body 45 is laid down between the rear portion of the rear frame member 46 and the rear portion of the side frame member 51, and forms a wall portion located behind the head of the infant when the back support body 45 is erected.

[0071] like Figure 1 and Figure 4 As shown, the seat support unit 40 has a pair of protection support bodies 54 connected to the left and right side parts of the seat support body 41, and a protection member 55 extending between the pair of protection support bodies 54. The left and right ends of the protection member 55 are respectively connected to the left and right protection support bodies 54 in a detachable manner. In addition, the seat support unit 40 has a canopy support body 57 that supports a canopy cloth (not shown). The canopy support body 57 includes a pair of canopy support members 58 respectively fixed to the two ends of the side frame member 51, and a canopy frame 59 extending between the pair of canopy support members 58. A canopy cloth is installed on the canopy frame 59 to form a canopy. The canopy covers the infant sitting on the seat support unit 40 from above and provides a sunshade environment for the infant.

[0072] like Figure 4 As shown, in this embodiment, one of the main frame 12 and the seat support unit 40 has a rail portion 60 that guides relative movement between the main frame 12 and the seat support unit 40. The other of the main frame 12 and the seat support unit 40 may have a travel portion 61 that moves the rail portion 60. Figure 4 A cross section along the front-rear direction and the up-down direction passing through the center in the width direction is shown from the inside in the width direction.

[0073] like Figure 4 As shown, in the example shown in the figure, the main frame 12 has a rail portion 60. The third link member L3 of the main frame 12 constitutes the rail portion 60. The main frame 12 includes a left rail portion 60 and a right rail portion 60. In the baby carriage 10 in the expanded state, the third link member L3 extends in the front-rear direction.

[0074] like Figure 4As shown, in the example shown in the figure, the seat support unit 40 has a travel portion 61. On the right rail portion 60, the seat support unit 40 has two travel portions 61 separated in the front-rear direction. On the left rail portion 60, the seat support unit 40 has two travel portions 61 separated in the front-rear direction. In the example shown in the figure, the seat support unit 40 has a total of four travel portions 61. The travel portion 61 arranged on the rail portion 60 can move along the rail portion 60.

[0075] In the example shown in the figure, the seat support unit 40 includes a first support 63 and a second support 64 fixed to the seat support body 41. The first support 63 and the second support 64 constitute the travel portion 61. The first support 63 and the second support 64 are fixed to the side portions 43 of the front frame member 42. The first support 63 and the second support 64 are installed in the right side portion 43 in the front-rear direction in a manner separated from each other. The first support 63 and the second support 64 are installed in the left side portion 43 in a manner separated from each other in the front-rear direction. The first support 63 is located at a position further forward in the front-rear direction than the second support 64. The second support 64 is located at a position further rearward in the front-rear direction than the first support 63. The seat support unit 40 includes two first supports 63 separated in the width direction. The seat support unit 40 includes two second supports 64 separated in the width direction.

[0076] like Figure 4 As shown, the first support member 63 is fixed to the middle part of each side portion 43. The first support member 63 has a first base portion 63a, a first connecting portion 63b, and a first connecting portion 63c. The first base portion 63a is installed on the side portion 43. The first connecting portion 63c is located on the rail portion 60 in a manner that can move relative to the rail portion 60. The first connecting portion 63c can slide on the rail portion 60.

[0077] The first connecting portion 63c of the first support member 63 shown in the figure is cylindrical. The third link member L3 constituting the rail portion 60 passes through the cylindrical first support member 63. The first connecting portion 63b connects the first base portion 63a and the first connecting portion 63c. The first support member 63 extends downward in the vertical direction from the seat support unit 40. The first base portion 63a, the first connecting portion 63b, and the first connecting portion 63c may be components integrally molded from resin.

[0078] In the example shown in the figure, the first support member 63 has the above-mentioned guard support body 54. The guard support body 54 may be integrally molded with the first base portion 63a, the first coupling portion 63b, and the first connecting portion 63c by resin.

[0079] like Figure 4As shown, the second support member 64 is fixed to the middle part of each side portion 43. The second support member 64 has a second base portion 64a, a second connecting portion 64b, and a second connecting portion 64c. The second base portion 64a is installed on the side portion 43. The second connecting portion 64c is located on the rail portion 60 in a manner that can move relative to the rail portion 60. The second connecting portion 64c can slide on the rail portion 60.

[0080] The second connecting portion 64c of the second support member 64 shown in the figure is cylindrical. The third link member L3 constituting the rail portion 60 passes through the cylindrical second connecting portion 64c. The second connecting portion 64b connects the second base portion 64a and the second connecting portion 64c. The second support member 64 extends downward in the vertical direction from the seat support unit 40. The second base portion 64a, the second connecting portion 64b, and the second connecting portion 64c may be components integrally molded from resin.

[0081] In the example shown in the figure, the second support member 64 has the above-mentioned side support portion 50. The side support portion 50 may be integrally molded with the second base portion 64a, the second coupling portion 64b, and the second connecting portion 64c by resin.

[0082] In the example shown in the figure, Figure 4 As shown, the seat support unit 40 is located above the third link member L3 in the up-down direction via the first support member 63 and the second support member 64 extending downward from the seat support body 41 .

[0083] By moving the travel portion 61 on the rail portion 60, the seat support unit 40 is relatively moved along the rail portion 60 with respect to the main frame 12. In a specific example shown in the figure, the rail portion 60 extends in the front-rear direction. The seat support unit 40 is relatively movable in the front-rear direction with respect to the main frame 12. Figure 4 and Fig. 8A In the embodiment, the seat support unit 40 is located at a first position relative to the main frame 12. In the first position, the seat support unit 40 is located forward in the front-rear direction. Figure 8B In the example shown in the figure, the seat support unit 40 moves relative to the main frame 12 between the first position and the second position.

[0084] As described above, the back support body 45 can swing (rotate) relative to the seat support body 41. The back support body 45 tilts by swinging relative to the seat support body 41. In the present embodiment, the seat support body 41 is linked to the tilting action of the back support body 45, and moves relative to the main frame 12 while being guided by the rail part 60 together with the back support body 45.

[0085] Fig. 8A The state in which the back support body 45 is collapsed with respect to the seat support body 41 is shown. In the state in which the back support body 45 is collapsed with respect to the seat support body 41, the seat support unit 40 is located in the front. Fig. 8A In the illustrated state, the seat support body 41 is located in the first position.

[0086] Figure 8B The rear frame member 46 is shown in a state where it stands with respect to the seat support body 41. When the rear frame member 46 is in a state where it stands with respect to the seat support body 41, the seat support unit 40 is located at the rear. Figure 8B In the illustrated state, the seat support 41 is located in the second position.

[0087] like Figure 4 As shown, the baby carriage body 11 shown in the figure also has a guide portion 70 provided on the main frame 12. Fig. 8A and Figure 8B As shown, during the tilting action of the back support body 45 , the back support body 45 can be supported by the guide portion 70 .

[0088] like Fig. 8A and Figure 8B As shown, the guide portion 70 is held at a constant position in the vertical direction and the front-rear direction by the main frame 12. Therefore, during the tilting movement of the back support body 45, the portion supported by the guide portion 70 of the back support body 45 passes through a constant position in the vertical direction and the front-rear direction arranged at the guide portion 70. As a result, the seat support body 41 is linked to the tilting movement of the back support body 45, and moves relative to the main frame 12 while being guided by the rail portion 60 together with the back support body 45.

[0089] Specifically, when the back support 45 falls down, the height of the back support 45 is relatively lowered, so the back support 45 moves forward in the front-rear direction. When the back support 45 stands up, the height of the back support 45 is relatively increased, so the back support 45 moves backward in the front-rear direction.

[0090] The back support body 45 is connected to the seat support body 41. The seat support body 41 is supported by the main frame 12 via the rail portion 60 so as to be relatively movable. Therefore, along with the movement of the back support body 45, the seat support body 41 connected to the back support body 45 moves relatively with respect to the main frame 12 while being guided by the rail portion 60. If the back support body 45 falls down relative to the seat support body 41, the seat support body 41 moves forward along the rail portion 60 together with the back support body 45 in the front-rear direction. If the back support body 45 stands up relative to the seat support body 41, the seat support body 41 moves backward along the rail portion 60 together with the back support body 45 in the front-rear direction.

[0091] Figure 4 He Ru Figure 5 As shown, in the example shown in the figure, the guide portion 70 is supported by the second link member L2 of the main frame 12. The guide portion 70 is provided on the inner side surface of the second link member L2 in the width direction. The guide portion 70 faces the back support body 45 of the seat support unit 40 in the width direction.

[0092] If available from Fig. 8A and Figure 8B As can be understood, the guide portion 70 is rotatable (rotatable) around the rotation axis X70 along the width direction. The back support body 45 changes its tilting angle by tilting. The guide portion 70 rotates as the direction of the back support body 45 changes during the tilting operation. Thus, during the tilting operation of the back support body 45, the state in which the back support body 45 is supported by the guide portion 70 can be stably maintained. During the tilting operation of the back support body 45, the guide portion 70 slides on the side portion 47 of the back support body 45. By making the guide portion 70 rotatable, the relative movement between the guide portion 70 and the back support body 45 can be made smoother.

[0093] The guide portion 70 sliding on the back support 45 includes not only moving on the back support 45 to which the guide portion 70 is fixed, but also relatively sliding on the back support 45 to which the guide portion 70 staying at a predetermined position is moved.

[0094] Figure 5 A specific example of the guide portion 70 is shown. Figure 5 In the example shown, the guide portion 70 has two guide wall portions 71. The two guide wall portions 71 protrude toward the inner side in the width direction. The two guide wall portions 71 protrude toward the back support body 45. The guide portion 70 has a guide recess 72 formed between the two guide wall portions 71. The guide recess 72 opens toward the inner side in the width direction. The guide recess 72 opens toward the back support body 45.

[0095] The guide recess 72 can accommodate the back support body 45. Figure 5 In the example shown, the side portion 47 of the back support body 45 indicated by the two-dot chain line, and / or the linear guide 77 and the back convex portion 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 convex portion 78. The other guide wall portion 71 is located below the side portion 47, the linear guide 77, and the back convex portion 78. The side portion 47, the linear guide 77, and the back convex portion 78 are restricted from being pulled out of the guide recess 72 by contacting the guide wall portion 71.

[0096] During the tilting operation of the back support body 45, the side portions 47 and the like move in the guide recess 72 along with the movement of the seat support body 41 and the back support body 45. Thus, during the tilting operation of the back support body 45, the state in which the back support body 45 is supported by the guide portion 70 can be stably maintained. During the tilting operation of the back support body 45, the side portions 47 and the like slide on the guide portion 70.

[0097] exist Figure 5 In the example shown, 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 extend slenderly. The guide wall portion 71 and the guide recess 72 extend along the side portion 47. According to this specific example, during the tilting action of the back support body 45, the state in which the back support body 45 is supported by the guide portion 70 can be stably maintained. The side portion 47 and the guide portion 70 can relatively move more smoothly along the axial direction of the side portion 47.

[0098] exist Figure 5 In the example shown, the side portion 47 is received in the guide recess 72 of the guide portion 70. However, the present embodiment is not limited to this example. Figure 6 As shown, the back support body 45 may include a linear guide 77 and a connecting arm portion 76 connecting 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 forms a back convex portion 78 protruding toward the outside in the width direction. The linear guide 77 forms a back convex portion 78 protruding toward the guide portion 70. The linear guide 77 as the back convex portion 78 may be arranged in the guide recess 72 of the guide portion 70.

[0099] A cloth-like member or the like may be installed on the side portion 47. Figure 6In the example shown, the side portion 47 is away from the guide portion 70, so that it is possible to suppress the cloth-like member or the like from hindering the relative movement between the back support body 45 and the guide portion 70. Therefore, during the tilting operation of the back support body 45, the relative movement between the guide portion 70 and the back support body 45 can be made smoother.

[0100] exist Figure 6 In the example shown, the connecting arm 76 extends downward from the side portion 47. The linear guide 77 is located below the side portion 47 in the vertical direction. The linear guide 77 is located outside the side portion 47 in the width direction. However, the present embodiment is not limited to this example. The linear guide 77 may be located inside the side portion 47 in the width direction. The linear guide 77 may be located above the side portion 47 in the vertical direction.

[0101] exist Figure 5 In the example shown, 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. Fig. 7A As shown, the width of the guide recess 72 may not be constant. The width of the guide recess 72 means the inner dimension of the guide recess 72 along the direction orthogonal to the width direction.

[0102] Fig. 7A The back support 45 shown can be used with Figure 6 The back support 45 shown is designed in the same way. Fig. 7A The back support body 45 shown has the rear frame member 46, the linear guide 77, and the connection arm part 76 which connects the rear frame member 46 and the linear guide 77. The linear guide 77 forms the back convex part 78.

[0103] exist Fig. 7AIn the example shown, the width of the guide recess 72 may be narrowed at the opening portion that becomes the inner side in the width direction. The width at the opening portion of the guide recess 72 may be smaller than the maximum width of the guide recess 72. The width at the opening portion of the guide recess 72 may be smaller than the maximum width of the portion of the back support body 45 that is accommodated in the guide recess 72. The width at the opening portion of the guide recess 72 may be smaller than the width of the side portion 47 of the back support body 45. The width at the opening portion of the guide recess 72 may be smaller than the width of the linear guide 77 of the back support body 45. The width at the opening portion of the guide recess 72 may be smaller than the width of the back convex portion 78 of the back support body 45. According to these examples, the state in which the side portion 47 of the back support body 45, the linear guide 77, and the back convex portion 78 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 convex portion 78 are supported by the guide recess 72 can be stably maintained. Thereby, the seat support body 41 can be stably moved relative to the main body frame 12 in conjunction with the tilting operation of the back support body 45 .

[0104] exist Figure 6 and Fig. 7A In the example shown, the back support body 45 has a convex portion (back convex portion 78), and the guide portion 70 includes a concave portion (guide concave portion 72) that accommodates the convex portion (back convex portion 78) of the back support body 45. However, the present embodiment is not limited to this example. The back support body 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 body 45 or a concave portion (guide concave portion 72) that accommodates the convex portion (back convex portion 78) of the back support body 45.

[0105] exist Figure 7B In the example shown, the back support body 45 includes a rear frame member 46, a linear guide 77, and a connecting arm portion 76 connecting the side portion 47 and the linear guide 77. The linear guide 77 forms a back recess 79. The back recess 79 is open outward in the width direction. The back recess 79 is open toward the guide portion 70. In addition to the linear guide 77 forming the back recess 79, Figure 7B The back support 45 shown may also be used with Figure 6 , Fig. 7A The back support 45 shown is designed in the same way.

[0106] exist Figure 7BIn the example shown, the guide portion 70 includes a guide protrusion 73 protruding from the main frame 12. The guide protrusion 73 can be provided on the second link member L2. The guide protrusion 73 can have a base end 73a and a front end 73b. The base end 73a extends from the main frame 12. The base end 73a can also be in a rod shape. The front end 73b is connected to the base end 73a. The front end 73b is away from the main frame 12. The front end 73b is accommodated in the back recess 79. The front end 73b constitutes the front end of the guide protrusion 73. The front end 73b can have a curved surface. The front end 73b can also have a spherical shape. The front end 73b can be wider than the base end 73a. Figure 7B The guide portion 70 shown may also extend linearly along the side portion 47 . Figure 7B The guide portion 70 shown may be a columnar or rod-shaped portion that protrudes from a specific position of the main frame 12 toward the back support 45 .

[0107] The guide portion 70 as the guide protrusion 73 can reduce the contact area with the back support body 45. Therefore, the guide protrusion 73 and the back support body 45 can slide more smoothly. The front end portion 73b having a curved surface or the front end portion 73b having a spherical shape contacts the back support body 45, so that the friction when the guide portion 70 contacts the back support body 45 can be reduced. As a result, the guide protrusion 73 and the back support body 45 can slide more smoothly. Therefore, the seat support body 41 can be stably moved relative to the main frame 12 in conjunction with the tilting action of the back support body 45.

[0108] Figure 7B The width of the back recess 79 shown is Fig. 7A The width of the guide recess 72 shown is also narrowed at the opening. Fig. 7A In the example shown, the width of the guide recess 72 becomes narrower at the opening portion that becomes the inner side in the width direction. The width at the opening portion of the back recess 79 is smaller than the maximum width of the guide protrusion 73. The width at the opening portion of the back recess 79 may be smaller than the maximum width of the portion of the guide portion 70 that is accommodated in the back recess 79. The width at the opening portion of the back recess 79 may also be smaller than the width of the front end portion 73b of the guide protrusion 73. According to these examples, the state in which the guide protrusion 73 of the guide portion 70 is accommodated in the guide recess 72 can be stably maintained. The state in which the back support body 45 is supported by the guide portion 70 can be stably maintained. As a result, the seat support body 41 can be stably moved relative to the main frame 12 in conjunction with the tilting action of the back support body 45.

[0109] According to the stroller 10 having the above structure, the main frame 12 has a rail portion 60 for guiding the relative movement between the seat support 41 and the main frame 12. The seat support 41 is linked to the tilting movement of the back support 45, and moves relative to the main frame 12 while being guided by the rail portion 60 together with the back support 45.

[0110] The position of the center of gravity of an infant riding in a baby stroller changes with the tilting movement of the back support body. For example, by raising the back support body relative to the seat support body, the position of the head and upper body of the infant moves upward and forward. Therefore, when the back support body is raised relative to the seat support body, the center of gravity of the infant is located upward and forward. On the other hand, by falling the back support body relative to the seat support body, the position of the head and upper body of the infant moves downward and backward. Therefore, when the back support body is raised relative to the seat support body, the center of gravity of the infant is located downward and backward. As a result, the position of the center of gravity of the entire baby stroller as the baby in the stroller also changes with the tilting movement of the back support body.

[0111] If the center of gravity of the baby stroller changes, the operability also changes. Due to the change in operability, the guardian who operates the baby stroller may feel uncomfortable when operating the baby stroller. In addition, if the center of gravity is extremely close to the front, rear, or top, it becomes difficult to operate the baby stroller, such as turning the baby stroller and / or driving up stairs.

[0112] According to the present embodiment, as described above, the seat support 41 and the back support 45 are linked to each other in the tilting motion, and the seat support 41 and the back support 45 are relatively moved with respect to the main frame 12. Therefore, it is possible to reduce the change in the center of gravity position of the infant riding in the baby carriage 10 caused by the tilting motion of the back support 45. Thus, it is possible to suppress the change in the operability of the baby carriage 10 caused by the tilting motion of the back support 45, and further improve the operability of the baby carriage 10 when turning and / or riding on stairs.

[0113] In addition, the relative movement of the seat support body 41 with respect to the main frame 12 is automatically performed in conjunction with the tilting action. Therefore, it is possible to suppress the discomfort felt by the guardian who operates the baby stroller 10. In addition, the baby stroller main body 11 has a rail portion 60, and the relative movement between the seat support unit 40 and the main frame 12 can be smoothly guided by the rail portion 60. According to this point, it is also possible to greatly suppress the discomfort felt by the guardian who operates the baby stroller 10.

[0114] In the specific example shown in the figure, the main body frame 12 has the rail portion 60 and has the running portion 61 on which the seat support body 41 of the seat support unit 40 moves on the rail portion 60. However, the present embodiment is not limited to this example.

[0115] The back support 45 may include at least a portion of the running portion 61 . For example, the second support 64 constituting the running portion 61 may be attached to the back support 45 .

[0116] In addition, if Figure 8C and Fig.8D As shown, the seat support unit 40 may include a rail portion 60, and the main frame 12 may include a travel portion 61 that moves relative to the rail portion 60 along the longitudinal direction of the rail portion 60. Figure 8C and Fig.8D In the example shown, the side portion 43 of the front frame member 42 of the seat support body 41 can constitute the rail portion 60. The first support member 63 and the second support member 64 constituting the travel portion 61 can 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 body 41. According to such a modified example, Figure 8C As shown in FIG. 1 , if the back support body 45 is laid down relative to the seat support body 41, the seat support body 41 and the back support body 45 also move forward in the front-rear direction. Fig.8D As shown in the figure, if 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. According to this modified example, the above-mentioned effect can be achieved, that is, the change in the center of gravity position caused by the tilting action of the back support 45 can be reduced, thereby improving the operability of the baby carriage 10.

[0117] exist Figure 8C and Fig.8D In the stroller 10 shown in the figure, the components other than the rail portion 60 and the travel portion 61 are similar to those of the stroller 10 shown in the figure. Figure 1 to Figure 8B The same as the above-mentioned stroller 10.

[0118] Reference at the edge Figure 1 to Figure 8B In the specific example of the stroller 10 described above, the rail portion 60 extends in the front-rear direction. According to this example, the change in the center of gravity position in the front-rear direction caused by the tilting movement of the back support body 45 can be reduced. As a result, the operability of the stroller 10 when turning and / or riding up stairs can be improved.

[0119] In the specific example of the above-mentioned baby carriage 10, Figure 8B As shown in FIG. 1 , when the back support body 45 is erected relative to the seat support body 41, the seat support body 41 is located at the rear in the front-rear direction. Fig. 8AAs shown, the seat support 41 is located forward in the front-rear direction when the back support 45 is fallen relative to the seat support 41. According to this example, the change in the center of gravity position of the infant in the front-rear direction caused by the tilting movement can be effectively reduced.

[0120] For example, when the back support 45 is upright relative to the seat support 41, the center of gravity of the infant can be brought closer to the center of the stroller 10 in the front-rear direction, thereby improving the operability of the stroller 10 when turning and / or walking over steps.

[0121] When the back support 45 is folded down relative to the seat support 41, the center of gravity of the infant can be brought closer to the center of the stroller 10 in the front-rear direction, and the operability of the stroller 10 when turning and / or walking over steps can be improved. In addition, there is a tendency for young infants to use the stroller 10 with the back support 45 folded down. When the back support 45 is folded down, the seat support 41 and the back support 45 are located forward in the front-rear direction, so that the infant can be easily placed on the seat support unit 40 or taken away from the seat support unit 40.

[0122] It should be noted that, in the above-mentioned embodiment, an example is shown in which the rail portion 60 extends in the front-rear direction, but the present embodiment is not limited to this example. Fig.9A and Fig. 9B As shown, the rail portion 60 may also extend in the up-down direction. Fig.9A and Fig. 9B In the example shown, the main frame 12 has a rail portion 60 extending in the up-down direction. For example, two rail portions 60 may be mounted separately in the front-rear direction on each third link member L3. Fig.9A and Fig. 9B In the example shown, the seat support unit 40 has a running part 61 that moves on the rail part 60. For example, two running parts 61 may be mounted separately in the front-rear direction on each side portion 43 of the seat support body 41. The running part 61 may have a cylindrical part through which the rail part 60 penetrates.

[0123] By moving the travel portion 61 on the rail portion 60, the seat support unit 40 moves relative to the main frame 12 in the up-down direction along the rail portion 60. Fig.9A In the embodiment, the seat support unit 40 is located at a first position relative to the main frame 12. In the first position, the seat support unit 40 is located at an upper position in the vertical direction. Fig. 9BIn the example shown in the figure, the seat support unit 40 moves relative to the main frame 12 between the first position and the second position.

[0124] exist Fig.9A and Fig. 9B In the example shown, the guide portion 70 described above may be provided. The configuration of the guide portion 70 and the back support body 45 interacting with the guide portion 70 may be the same as the configuration described above. Fig.9A and Fig. 9B In the example shown, the guide portion 70 is also held at a constant position in the vertical direction and the front-rear direction. Therefore, during the tilting movement of the back support body 45, the portion supported by the guide portion 70 of the back support body 45 passes through a constant position in the vertical direction and the front-rear direction where the guide portion 70 is arranged. As a result, the seat support body 41 is linked to the tilting movement of the back support body 45, and while being guided by the rail portion 60 together with the back support body 45, it moves relative to the main frame 12 in the vertical direction.

[0125] exist Fig.9A and Fig. 9B In the stroller 10 shown in the figure, the components other than the rail portion 60 and the travel portion 61 can be similar to those described in the accompanying drawings. Figure 1 to Figure 8B The same as the above-mentioned stroller 10.

[0126] exist Fig.9A and Fig. 9B In the specific example shown, the rail portion 60 extends in the vertical direction. According to this example, the change in the center of gravity position in the vertical direction caused by the tilting movement of the back support body 45 can be reduced. As a result, the operability of the baby carriage 10 when turning and / or riding up stairs can be improved.

[0127] In this specific example, Fig. 9B As shown in FIG. 1 , when the back support body 45 is erected relative to the seat support body 41, the seat support body 41 is located below in the vertical direction. Fig.9A As shown, the seat support 41 is located vertically upward when the back support 45 is tilted relative to the seat support 41. According to this example, the change in the center of gravity of the infant in the vertical direction caused by the tilting movement can be effectively reduced.

[0128] For example, when the back support 45 is upright relative to the seat support 41, the head and upper body of the infant riding in the stroller 10 are located at the upper side in the vertical direction. Fig. 9BAs shown, when the back support 45 is erected, the center of gravity of the infant can be lowered by lowering the seat support 41 and the back support 45 downward in the vertical direction. This improves the operability of the stroller 10 when turning and / or crossing steps.

[0129] When the back support 45 is in a state in which it is fallen down relative to the seat support 41, the head and upper body of the infant riding in the stroller 10 are located at the bottom in the vertical direction and close to the running surface of the stroller 10. Fig.9A As shown in the figure, when the back support 45 is in the fallen state, the position of the infant can be raised by raising the seat support 41 and the back support 45 upward in the vertical direction. In this way, the infant can be kept away from the running surface of the baby carriage 10, and the influence of heat and / or dust from the running surface on the infant can be alleviated.

[0130] In addition, for infants of young age, there is a tendency to use the stroller 10 with the back support 45 laid down. When the back support 45 is laid down, the seat support 41 and the back support 45 are located at the upper side in the vertical direction, so that the infant can be easily placed on the seat support unit 40 or taken away from the seat support unit 40.

[0131] It should be noted that Fig.9A and Fig. 9B In the specific example shown, the main frame 12 has a rail portion 60 and a running portion 61 on which the seat support 41 of the seat support unit 40 moves. However, the present embodiment is not limited to this example. The back support 45 may also have at least a portion of the running portion 61.

[0132] In addition, if Fig. 9C and Fig.9D As shown, the seat support unit 40 may include a rail portion 60, and the main frame 12 may include a travel portion 61 that moves relative to the rail portion 60 along the longitudinal direction of the rail portion 60. Fig. 9C and Fig.9D In the example shown in FIG. 1 , a rail portion 60 may be installed on the side portion 43 of the front frame member 42 of the seat support body 41. The travel portion 61 may be fixed to the third link member L3 and slide on the rail portion 60 hanging from the side portion 43 of the seat support body 41. According to such a modified example, Fig. 9C As shown in FIG. 1 , if the back support body 45 is laid down relative to the seat support body 41, the seat support body 41 and the back support body 45 also move upward in the vertical direction. Fig.9DAs shown in the figure, if 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. According to this modified example, the above-mentioned effect can be achieved, that is, the change in the center of gravity position caused by the tilting action of the back support 45 can be reduced, thereby improving the operability of the baby carriage 10.

[0133] exist Fig. 9C and Fig.9D In the stroller 10 shown in the figure, the components other than the rail portion 60 and the travel portion 61 are similar to those of the stroller 10 shown in the figure. Figure 1 to Figure 8B The same as the above-mentioned stroller 10.

[0134] As another modification, the rail portion 60 may also be tilted relative to the front-rear direction and the up-down direction. Fig. 8A and Figure 8B In the example shown, the rail portion 60 (third link member L3) can be tilted with respect to the front-rear direction so that the front in the front-rear direction is located above in the vertical direction and the rear in the front-rear direction is located below in the vertical direction. Fig.9A and Fig. 9B In the examples shown, the rail portion 60 can be tilted relative to the vertical direction in such a manner that the upper portion in the vertical direction is located forward in the front-rear direction and the lower portion in the vertical direction is located rearward in the front-rear direction. According to these examples, when the back support body 45 is erected relative to the seat support body 41, the seat support body 41 and the back support body 45 are located downward in the vertical direction and rearward in the front-rear direction. When the back support body 45 is tilted relative to the seat support body 41, the seat support body 41 and the back support body 45 are located upward in the vertical direction and forward in the front-rear direction. According to these examples, the above-mentioned effects can be made more significant. For example, the change in the center of gravity position caused by the tilting action of the back support body 45 can be more effectively reduced, thereby improving the operability of the stroller 10.

[0135] In one embodiment described above, the baby carriage 10 has a baby carriage body 11. The baby carriage body 11 has a main frame 12 and a seat support unit 40 supported by the main frame 12. The seat support unit 40 has a seat support body 41 supported by the main frame 12 and a back support body 45 that can be tilted relative to the seat support body 41. One of the main frame 12 and the seat support unit 40 has a rail portion 60 that guides the relative movement between the seat support body 41 and the main frame 12. The seat support body 41 is linked to the tilting movement of the back support body 45, and moves relative to the main frame 12 while being guided by the rail portion 60. According to this embodiment, the change in the center of gravity position of the infant riding in the baby carriage 10 caused by the tilting movement of the back support body 45 can be reduced. As a result, the change in the operability of the baby carriage 10 can be suppressed.

[0136] In the specific example of the above-mentioned embodiment, the rail portion 60 guides the seat support body 41 to move in the front-back direction. According to this specific example, by reducing the change in the center of gravity position in the front-back direction caused by the tilting action of the back support body 45, it is possible to suppress the change in the operability of the baby stroller 10. As a result, it is possible to improve the operability of the baby stroller 10 when turning and / or riding up stairs.

[0137] In the specific example of the above-mentioned embodiment, when the back support body 45 is in an upright state, the seat support body 41 is located at the rear in the front-to-back direction. When the back support body 45 is in a down state, the seat support body 41 is located at the front in the front-to-back direction. According to this specific example, by reducing the change in the center of gravity position in the front-to-back direction caused by the tilting action of the back support body 45, it is possible to suppress the change in the operability of the baby carriage 10. In particular, when the back support body 45 is in an upright state, the seat support body 41 is located at the rear in the front-to-back direction, so that the operability of the baby carriage 10 can be improved. When the back support body 45 is in a down state, the seat support body 41 is located at the front in the front-to-back direction, so that the operability of the baby carriage 10 can be improved, and the infant can be easily placed in the baby carriage 10 or taken away from the baby carriage 10.

[0138] In the specific example of the above-mentioned embodiment, the rail portion 60 guides the seat support body 41 to move in the vertical direction. According to this specific example, by reducing the change in the center of gravity position in the vertical direction caused by the tilting action of the back support body 45, it is possible to suppress the change in the operability of the baby stroller 10. As a result, it is possible to improve the operability of the baby stroller 10 when turning and / or riding up stairs.

[0139] In the specific example of the above-mentioned embodiment, when the back support body 45 is in an upright state, the seat support body 41 is located at a lower position in the vertical direction. When the back support body 45 is in a down position, the seat support body 41 is located at an upper position in the vertical direction. According to this specific example, by reducing the change in the position of the center of gravity in the up-down direction caused by the tilting action of the back support body 45, the change in the operability of the baby carriage 10 can be suppressed. In particular, when the back support body 45 is in an upright state, the seat support body 41 is located at a lower position in the vertical direction, so that the operability of the baby carriage 10 can be improved. When the back support body 45 is in a down position, the seat support body 41 is located at an upper position in the vertical direction, so that it is easy to put an infant into the baby carriage 10 or take the infant away from the baby carriage 10, and the influence of heat and / or dust from the running surface on the infant can be alleviated.

[0140] In the specific example of the above-mentioned embodiment, the stroller body 11 further includes a guide portion 70 provided on the main frame 12. During the tilting operation, the back support 45 is supported by the guide portion 70, and the seat support 41 is supported by the main frame 12 via the rail portion 60. According to this specific example, the seat support 41 can be stably moved in conjunction with the tilting operation of the back support 45 by using a simple configuration of the guide portion 70.

[0141] In the specific example of the above-mentioned embodiment, the guide portion 70 is mounted on the main frame 12 in a manner that allows rotation around an axis line along the width direction. According to this specific example, the state in which the back support body 45 is supported by the guide portion 70 can be stably maintained during the tilting action of the back support body 45. In addition, the back support body 45 and the guide portion 70 can be smoothly moved relative to each other. By this, the seat support body 41 can be stably moved in conjunction with the tilting action of the back support body 45.

[0142] In the specific example of the above-mentioned embodiment, the guide portion 70 has a recess (guide recess 72) for accommodating the back support body 45. According to this specific example, during the tilting operation of the back support body 45, the state in which the back support body 45 is supported by the guide portion 70 can be stably maintained. In addition, the back support body 45 and the guide portion 70 can be smoothly moved relative to each other. By this, the seat support body 41 can be stably moved in conjunction with the tilting operation of the back support body 45.

[0143] In the specific example of the above-mentioned embodiment, the back support body 45 has a concave portion (back concave portion 79) or a convex portion (back convex portion 78). The guide portion 70 has a convex portion (guide convex portion 73) inserted into the concave portion (back concave portion 79) of the back support body 45 or a concave portion (guide concave portion 72) that accommodates the convex portion (back convex portion 78) of the back support body 45. During the tilting operation of the back support body 45, the guide portion 70 slides on the back support body 45. According to this specific example, during the tilting operation of the back support body 45, the state in which the back support body 45 is supported by the guide portion 70 can be stably maintained. In addition, the back support body 45 and the guide portion 70 can be smoothly moved relative to each other. By this, the seat support body 41 can be stably moved in conjunction with the tilting operation of the back support body 45.

[0144] In the specific example of the above-mentioned embodiment, the guide portion 70 has a convex portion (guide convex portion 73) protruding from the main frame 12. During the tilting operation of the back support body 45, the convex portion (guide convex portion 73) of the guide portion 70 slides on the back support body 45. According to this specific example, during the tilting operation of the back support body 45, the state in which the back support body 45 is supported by the guide portion 70 can be stably maintained. In addition, the back support body 45 and the guide portion 70 can be smoothly moved relative to each other. These are linked to the tilting operation of the back support body 45, and the seat support body 41 is stably moved.

[0145] In the specific example of the above-mentioned embodiment, the main frame 12 has a link member that allows the main frame 12 to be foldable and unfoldable. Any of the link members constitutes the track portion 60. According to this specific example, the link member of the foldable main frame 12 can be used as the track portion 60 for guiding the relative movement between the seat support body 41 and the main frame 12. It is possible to avoid using a dedicated component constituting the track portion 60, thereby preventing the baby carriage 10 from becoming complicated, large, and heavy.

[0146] In the specific example of the above-mentioned embodiment, the main 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 of the foldable main frame 12 can be used as the rail portion 60 for guiding the relative movement between the seat support body 41 and the main frame 12. It is possible to avoid using a dedicated member constituting the rail portion 60, so that the baby carriage 10 can be prevented from becoming complicated, large, and heavy.

[0147] In the specific example of the above-mentioned embodiment, the main frame 12 includes: 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 provided near the back support body 45 using the link member of the foldable main frame 12. Therefore, the size of the guide portion 70 can be suppressed. In addition, the use of a dedicated component for connecting the guide portion 70 to the main frame 12 can be avoided. By this, the complexity, size and weight of the baby carriage can be suppressed.

[0148] In the specific example of the above-mentioned embodiment, the seat support unit 40 has a canopy support body 57. The canopy support body 57 moves relatively with the seat support body 41 relative to the main frame 12. According to this specific example, even if the relative position of the seat support body 41 relative to the main frame 12 changes, the positional relationship between the seat support body 41 and the canopy support body 57 (and therefore, the canopy) can be maintained. Therefore, even if the relative position of the seat support body 41 relative to the main frame 12 changes, the canopy can be maintained at an appropriate position relative to the infant on the seat support unit 40.

[0149] In the specific example of the above-mentioned embodiment, the seat support unit 40 has a guard 55. The guard 55 moves relatively with the seat support body 41 relative to the main frame 12. According to this specific example, even if the relative position between the seat support body 41 and the main frame 12 changes, the relative position between the seat support body 41 and the guard 55 can be maintained. Therefore, even if the relative position of the seat support body 41 with respect to the main frame 12 changes, the guard 55 can be maintained at an appropriate position relative to the infant on the seat support unit 40.

[0150] In the specific example of the above-mentioned embodiment, the back support 45 can move relative to the main frame 12 together with the seat support 41. According to such a stroller 10, even if the relative position of the seat support 41 with respect to the main frame 12 changes, the relative position between the seat support 41 and the back support 45 can be maintained.

[0151] While one embodiment is described with reference to specific examples, the above-mentioned specific examples do not limit one embodiment. The above-mentioned one embodiment can be implemented with various other specific examples, and various omissions, substitutions, changes, additions, etc. can be made without departing from the scope of the gist.

[0152] In the above-mentioned embodiment, an example is shown in which the handle 30 can swing relative to the main frame 12. However, the present embodiment is not limited to this example. The handle can also be formed by extending the member constituting the second link member L2 upward. That is, the handle separately provided relative to the second link member L2 can also be omitted. The second link member L2 can also be configured as a part of the handle.

Claims

1. A baby stroller, characterized in that: The invention has a baby stroller body, The baby carriage body includes a main body frame and a seat support unit supported by the main body frame. The seat support unit includes a seat support body supported by the main frame and a back support body that is tiltable relative to the seat support body. One of the main frame and the seat support unit has a rail portion for guiding relative movement between the seat support body and the main frame. The seat support body is linked with the tilting movement of the back support body, and moves relatively with respect to the main body frame while being guided by the rail portion.

2. The baby stroller according to claim 1, characterized in that: The rail portion guides the seat support body to move in the front-rear direction.

3. The baby stroller according to claim 2, characterized in that: When the back support body is in an upright state, the seat support body is located at the rear in the front-rear direction. When the back support body is in a fallen state, the seat support body is located forward in the front-rear direction.

4. The baby stroller according to claim 1, characterized in that: The rail portion guides the seat support body to move in the vertical direction.

5. The baby stroller according to claim 4, characterized in that: When the back support body is in an upright state, the seat support body is located at a lower position in the up-down direction. When the back support body is in a fallen state, the seat support body is located upward in the up-down direction.

6. The baby stroller according to claim 1, characterized in that: The baby carriage body has a guide portion arranged on the main frame. During the tilting operation of the back support body, the back support body is supported by the guide portion.

7. The baby stroller according to claim 6, characterized in that: The guide portion is mounted to the main frame so as to be rotatable around an axis line along the width direction.

8. The baby stroller according to claim 6, characterized in that: The guide portion has a recess for accommodating the back support body.

9. The baby stroller according to claim 6, characterized in that: The back support has a concave portion or a convex portion, The guide portion has a convex portion inserted into the concave portion of the back support body or a concave portion that accommodates the convex portion of the back support body. During the tilting motion, the guide portion slides on the back support body.

10. The baby stroller according to claim 6, characterized in that: The guide portion has a convex portion protruding from the main frame, During the tilting operation, the convex portion of the guide portion slides on the back support body.

11. The baby stroller according to claim 1, characterized in that: The main frame has a link member that allows the main frame to be foldable and unfoldable. Any one of the link members constitutes the rail portion.

12. The baby stroller according to claim 1, characterized in that: The main frame has: a first connecting rod 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; as well as a third link member, which is disposed between the front leg and the second link member and is rotatable relative to the front leg and the second link member, The third link member constitutes the rail portion.

13. The baby stroller according to claim 6, characterized in that: The main frame has: a first connecting rod 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; as well as a third link member, which is disposed between the front leg and the second link member and is rotatable relative to the front leg and the second link member, The guide portion is provided on the second link member.

14. The baby stroller according to claim 1, characterized in that: The seat support unit has a canopy support body. The canopy support body moves relatively to the main body frame together with the seat support body.

15. The baby stroller according to claim 1, characterized in that: The seat support unit has a protection element, The guard moves relatively to the main frame together with the seat support.

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