WO2020218304A1 - 乳母車 - Google Patents

乳母車 Download PDF

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Publication number
WO2020218304A1
WO2020218304A1 PCT/JP2020/017225 JP2020017225W WO2020218304A1 WO 2020218304 A1 WO2020218304 A1 WO 2020218304A1 JP 2020017225 W JP2020017225 W JP 2020017225W WO 2020218304 A1 WO2020218304 A1 WO 2020218304A1
Authority
WO
WIPO (PCT)
Prior art keywords
baby carriage
caster
rotating body
link
pair
Prior art date
Application number
PCT/JP2020/017225
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
清水　直
陽子 三井
Original Assignee
コンビ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コンビ株式会社 filed Critical コンビ株式会社
Priority to CN202080005998.8A priority Critical patent/CN112969625B/zh
Priority to JP2021516141A priority patent/JP6915935B2/ja
Priority to CN202110958988.2A priority patent/CN113501044B/zh
Publication of WO2020218304A1 publication Critical patent/WO2020218304A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/042—Steering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B62B7/08—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis
    • B62B7/083—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis the wheel axes being moved from each other during folding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
    • B62B9/20—Handle bars; Handles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
    • B62B9/20—Handle bars; Handles
    • B62B9/203—Handle bars; Handles movable from front end to rear end position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
    • B62B2301/04—Wheel arrangements; Steering; Stability; Wheel suspension comprising a wheel pivotable about a substantially vertical axis, e.g. swivelling castors
    • B62B2301/046—Wheel arrangements; Steering; Stability; Wheel suspension comprising a wheel pivotable about a substantially vertical axis, e.g. swivelling castors with means restricting the rotation about that axis

Definitions

  • the present invention relates to a baby carriage in which the handle can swing between the first position and the second position.
  • Patent Document 1 JP2017-81252A
  • a baby carriage with a swingable handle is known.
  • the handle can swing between the back push position and the face-to-face push position.
  • the handle In the back push position, the handle is located on the back side of the baby, and the guardian pushes the baby carriage from the back side of the baby to advance the baby carriage.
  • the handle In the face-to-face push position, the handle is located on the side facing the baby, and the guardian pushes the baby carriage from the side facing the baby to advance the baby carriage.
  • the handle When the handle is in the back push position, the infant can face forward in the running direction.
  • the steering wheel When the steering wheel is in the face-to-face push position, the guardian can drive the baby carriage while checking the baby. For this reason, when a young infant is placed on the baby carriage, the handle is often placed in the face-to-face push position. For example, when the baby after sitting down is placed on the baby carriage, the handle is placed in the back push position. Tend to do.
  • the position of the handle tends to change according to the age of the infant.
  • the conventional baby carriage has not been devised to change its characteristics according to the steering wheel position.
  • the stability of the stroller can be improved when the handle is placed in a face-to-face push position, which tends to be applied to younger infants, while infants older than the face-to-face push position. It would be convenient if the maneuverability of the stroller could be improved when the steering wheel is located at the back push position, which tends to be applied to.
  • the present invention has been made in consideration of the above points, and an object of the present invention is to change the characteristics of a baby carriage according to the arrangement of swingable handles.
  • the baby carriage according to the present invention A body frame with front and rear legs, A handle connected to the main body frame so as to be swingable between the first position and the second position, A first fixed body fixed to the front leg, a first rotating body rotatably supported by the first fixed body about the first caster axis, and a single rotatably supported by the first rotating body.
  • a first fixed body fixed to the front leg a first rotating body rotatably supported by the first fixed body about the first caster axis
  • a single rotatably supported by the first rotating body With one front wheel, with the first caster, A second fixed body fixed to the hind legs, a second rotating body rotatably supported by the second fixed body about the second caster axis, and rotatably supported by the second rotating body.
  • the main body frame A first link rotatably connected to the front leg and the rear leg, A second link rotatably connected to the first link, A third link rotatably connected to the front leg, It has a fourth link that is rotatably connected to the hind legs.
  • the second link is rotatably connected to at least one of the third link and the fourth link.
  • the third link is rotatably connected to at least one of the fourth link and the second link.
  • the fourth link may be rotatably connected to at least one of the second link and the third link.
  • connection position of the third link and the fourth link may be located behind the front leg in the side view.
  • connection position of the third link and the second link may be located behind the front leg in the side view.
  • connection position of the frame material and the base frame may be located behind the front leg in the side view.
  • the main body frame has a pair of front legs provided apart in the width direction and a pair of rear legs provided apart in the width direction.
  • the first caster is provided on each of the pair of front legs.
  • the second casters are provided on each of the pair of hind legs.
  • the rear wheel located outside the width direction of the pair of rear wheels of each second caster is outside the width direction of the front wheel of the first caster located on the same side in the width direction as the second caster. It may be located in the direction.
  • the main body frame has a pair of front legs provided apart in the width direction and a pair of rear legs provided apart in the width direction.
  • the first caster is provided on each of the pair of front legs.
  • the second casters are provided on each of the pair of hind legs.
  • the front wheels of each first caster may be located between the pair of rear wheels of the first caster and the second caster located on the same side in the width direction.
  • the front wheels of each first caster are located at the center of the pair of rear wheels of the second caster located on the same side as the first caster in the width direction. You may.
  • the distance between the pair of rear wheels may be larger than the width of the front wheels in the width direction.
  • the distance between the pair of rear wheels may be larger than the width of the first fixed body in the width direction.
  • the first rotating body has a first rotating body base rotatably connected to the first fixed body about the first caster axis, and the front wheels connected to the first rotating body base and rotating the front wheels via an axle.
  • the handle may be foldable with the handle arranged at the first position.
  • the diameter of the front wheel may be smaller than the diameter of the rear wheel.
  • the width of the rear wheels may be narrower than the width of the front wheels.
  • the main body frame has a pair of front legs provided apart in the width direction and a pair of rear legs provided apart in the width direction.
  • the first caster is provided on each of the pair of front legs.
  • the second casters are provided on each of the pair of hind legs.
  • the first caster axis of each first caster may be positioned at the same position as the second caster axis of the second caster located on the same side as the first caster in the width direction. Good.
  • the first rotating body has a first rotating body base rotatably connected to the first fixed body about the first caster axis, and the front wheels connected to the first rotating body base and rotating the front wheels via an axle.
  • the first rotating body base includes a first facing surface facing the first fixed body from below. In the width direction, the width of the first facing surface is smaller than the width of the first rotating body holder, and the first facing surface is located within the range in which the first rotating body holder is located. You may.
  • the first rotating body has a first facing surface facing the first fixed body from below.
  • the second rotating body has a second facing surface facing the second fixed body from below.
  • the height of the first facing surface may be higher than the height of the second facing surface.
  • the first rotating body has a first facing surface facing the first fixed body from below.
  • the height of the first facing surface may be equal to or greater than the diameter of the front wheel.
  • the first rotating body has a first facing surface facing the first fixed body from below.
  • the height of the first facing surface may be equal to or greater than the diameter of the rear wheel.
  • the second rotating body has a second facing surface facing the second fixed body from below.
  • the height of the second facing surface may be less than the diameter of the front wheel.
  • the second rotating body has a second facing surface facing the second fixed body from below.
  • the height of the second facing surface may be less than the diameter of the rear wheel.
  • the characteristics of the baby carriage can be changed according to the arrangement of the swingable handle.
  • FIG. 1 It is a figure for demonstrating one Embodiment of this invention, and is the perspective view for demonstrating the whole structure of a baby carriage.
  • the front view which shows a part of the baby carriage of FIG.
  • FIGS. 1 to 8B are diagrams for explaining an embodiment of a baby carriage according to the present invention.
  • FIGS. 1 to 4 show the overall configuration of a specific example of the baby carriage.
  • 5 and 6 are perspective views or front views partially showing the baby carriage.
  • the baby carriage 10 in the present embodiment is connected to the main body frame 12 having the front legs 14 and the rear legs 16 and the main body frame 12 so as to be swingable with respect to the main body frame 12. It has a handle 40, a first caster 50 attached to the front leg 14, and a second caster 60 attached to the rear leg 16.
  • the main body frame 12 and the handle 40 form the baby carriage main body 11.
  • the seat material 13 having a cushioning property is detachably attached to the baby carriage main body 11. Infants sit or lie down on the seating material 13.
  • the handle 40 is swingable with respect to the main body frame 12 between the first position and the second position.
  • the first position of the handle 40 is the back push position (see FIGS. 1 and 2) and the second position of the handle 40 is the face-to-face push position (see FIG. 3).
  • the handle 40 is inclined with respect to the vertical direction and extends rearward at the first position, which is the back pushing position.
  • the operator grips the handle 40 from the back side of the infant and operates the baby carriage 10. At this time, the infant can enjoy the scenery while facing the front in the traveling direction while the baby carriage 10 is running.
  • the handle 40 is inclined in the vertical direction and extends forward at the second position, which is the face-to-face pushing position.
  • the handle 40 When the handle 40 is arranged at the second position, which is the face-to-face push position, the operator grips the handle 40 from the position on the front leg side facing the baby and operates the baby carriage 10. At this time, the baby carriage 10 can be driven so that the rear leg side of the baby carriage 10 is in front of the traveling direction.
  • the illustrated baby carriage 10 (baby carriage main body 11) is configured to be foldable from the unfolded state shown in FIGS. 1 and 2 to the folded state shown in FIG. 4, as is widely used.
  • the baby carriage 10 (baby carriage main body 11) can also be unfolded from the folded state to the unfolded state.
  • the handle 40 can be swung with respect to the main body frame 12.
  • the terms “front”, “rear”, “up”, “down”, “front-back direction”, and “vertical direction” for the baby carriage and its components are not specified unless otherwise specified. It means “front”, “rear”, “up”, “down”, “front-back direction”, and “vertical direction” based on the baby carriage in the deployed state and the infant riding on its components. More specifically, the “front-back direction” is the direction connecting the lower left and upper right of the paper surface in FIG. 1, and corresponds to the left-right direction of the paper surface in FIGS. 2 and 3. Unless otherwise specified, the “front” is the side facing the baby on board, 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.
  • the "vertical direction” is a direction orthogonal to the traveling surface of the baby carriage. Therefore, when the traveling surface is a horizontal plane, the “vertical direction” refers to the vertical direction. Further, the “horizontal direction” is a width direction, which is a direction orthogonal to both the "front-back direction” and the “vertical direction”. As shown in FIG. 1, the illustrated baby carriage 10 is generally located at the center in the lateral direction and has a substantially symmetrical configuration centered on a surface along the front-rear direction and the vertical direction.
  • the baby carriage main body 11 will be described as an overall configuration of the baby carriage.
  • the baby carriage main body 11 has a main body frame 12 and a handle 40.
  • 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, respectively, as shown in FIG.
  • the main body frame 12 further has a first link L1, a second link L2, a third link L3, and a fourth link L4 arranged on the left and right, respectively.
  • the front legs 14, the rear legs 16, and the first to fourth links L1 to L4 function as links that make the baby carriage body 11 foldable and deployable.
  • the first link L1 also functions as an armrest 21. That is, the armrest 21 constitutes the first link L1.
  • the upper end portion of the front leg 14 is rotatably (swingable) connected to the front portion of the first link L1 arranged on the corresponding side (left side or right side). ..
  • the upper end portion of the rear leg 16 is rotatably (swingable) connected to the front portion of the first link L1 arranged on the corresponding side (left side or right side).
  • the upper portion of the second link L2 is rotatably (swingable) connected to the rear portion of the first link L1 arranged on the corresponding side (left side or right side).
  • the second link L2 has a main link member 22 and an upper connecting member 23 fixed to the upper end of the main link member 22.
  • the main link material 22 is made of, for example, a metal pipe.
  • the upper connecting material 23 is made of, for example, a resin molded product.
  • the second link L2 is rotatably (swingable) connected to the rear end portion of the armrest 21 in the upper connecting member 23.
  • the third link L3 is rotatably (swingable) connected to the front leg 14.
  • the fourth link L4 is rotatably (swingable) connected to the rear leg 16.
  • the third link L3 is rotatably (swingable) connected to at least one of the second link L2 and the fourth link L4.
  • the fourth link L4 is rotatably (swingable) connected to at least one of the second link L2 and the third link L3.
  • the second link L2 is rotatably (swingable) connected to at least one of the third link L3 and the fourth link L4.
  • a frame material 24 and a front connecting material 25 and a rear connecting material 26 fixed to the frame material 24 are provided as members forming the third link L3. ing.
  • the frame material 24 is made of, for example, a bent metal pipe.
  • the front connecting material 25 and the rear connecting material 26 are made of, for example, a resin molded product.
  • the frame material 24 has a U-shape having a pair of side portions 24a extending in the front-rear direction and a connecting portion 24b connecting the pair of side portions 24a in the front direction.
  • One end of the front connecting member 25 is rotatably connected to the front leg 14, and the other end is fixed to the front portion of the side portion 24a.
  • the rear connecting member 26 is fixed to the rear end portion of the side portion 24a.
  • the right third link L3 is formed by the side portion 24a of the frame member 24 located on the right side and the right front connecting member 25 and the rear connecting member 26 fixed to the right side portion 24a.
  • the left third link L3 is formed by the side portion 24a of the frame member 24 located on the left side and the left front connecting member 25 and the rear connecting member 26 fixed to the left side portion 24a.
  • the fourth link L4 includes a spindle member 28 rotatably connected to the rear leg 16 and an end member 29 fixed to the upper end portion of the spindle member 28.
  • the spindle member 28 is made of, for example, a metal pipe.
  • the end member 29 is made of, for example, a resin molded product.
  • the spindle member 28 is rotatably connected to the intermediate portion of the rear leg 16 at the lower end portion.
  • the end member 29 is rotatably connected to the second link L2 and the third link L3.
  • the second link L2, the third link L3, and the fourth link L4 are rotatably connected to each other by using the same shaft member 30.
  • the shaft member 30 penetrates the main link member 22 of the second link L2, the end member 29 of the fourth link L4, and the rear connecting member 26 forming the third link L3.
  • the second link L2, the third link L3, and the fourth link L4 are rotatable about each other about an axis that coincides with the central axis of the shaft member 30.
  • the main body frame 12 of the illustrated baby carriage 10 further includes a base frame 31 and an upper frame 32, and a connecting frame 33 connecting the base frame 31 and the upper frame 32.
  • Both the base frame 31 and the upper frame 32 are formed in a U shape.
  • the base cloth material 34 (shown only in FIG. 2) is stretched on the frame material 24 and the base frame 31.
  • the base cloth material 34 supports the cushioning seat material 13 (shown by a two-dot chain line only in FIG. 2) together with the frame material 24, the base frame 31, the upper frame 32, and the connecting frame 33.
  • the base frame 31, the upper frame 32, and the connecting frame 33 are not shown.
  • the frame material 24, the base frame 31, the upper frame 32, the connecting frame 33, and the base cloth material 34 form a seat support and support the seat material 13.
  • a part of the base cloth material 34 and the frame material 24 form a seat support that supports the buttocks of the baby.
  • a part of the base cloth material 34 and the base frame 31 form a back support that supports the back of the baby.
  • the base frame 31 is penetrated by the shaft member 30 at both ends thereof (see FIG. 5).
  • the base frame 31 is rotatable (swingable) with respect to the frame material 24 and other components. By swinging the base frame 31 with respect to the frame material 24, the seat material 13 can be reclined.
  • the upper frame 32 is rotatably (swingable) connected to the rear end portion of the first link L1 at both ends thereof.
  • the rotation axis of the upper frame 32 with respect to the first link L1 is located on the same line as the rotation axis of the second link L2 with respect to the first link L1.
  • a pair of connecting frames 33 are provided between the base frame 31 and the upper frame 32 so as to be laterally spaced apart from each other.
  • the connecting frame 33 is rotatably connected to the base frame 31 and the upper frame 32 at both ends thereof.
  • the main body frame 12 includes a front connecting member 15 that connects a pair of front legs 14 and a rear connecting member 17 that connects a pair of rear legs 16 as components extending in the lateral direction.
  • the front connecting member 15 extends between the pair of first casters 50
  • the rear connecting member 17 extends between the pair of second casters 60.
  • the front connecting member 15 functions as a footrest.
  • a central connecting member 27 is provided between the pair of rear connecting members 26.
  • the front connecting member 15, the rear connecting member 17, and the central connecting member 27 can suppress the lateral deformation of the baby carriage 10.
  • a flexible guard member 38 is detachably provided between the pair of first links L1.
  • the handle 40 is swingably connected to the main body frame 12 described above.
  • the handle 40 has a handle body 41 swingably attached to the body frame 12 and a holding body 42 provided on the handle body 41.
  • the handle 40 has a first position (rear push position) that is tilted rearward from the vertical axis and a second position (face-to-face push position) that is tilted forward from the vertical axis. It is possible to swing between.
  • the handle body 41 includes a pair of shaft portions 41a extending substantially parallel to each other and an intermediate portion 41b connecting the pair of shaft portions 41a.
  • the handle body 41 has a substantially U-shaped shape as a whole.
  • the handle 40 is rotatably (swingable) connected to the main body frame 12 at both ends of the U-shape.
  • the handle body 41 is rotatably connected to the body frame 12 by using the shaft member 30. Therefore, the second link L2, the third link L3, the fourth link L4, the base frame 31, and the handle 40 are rotatable with respect to each other about the same axis defined by the shaft member 30. ..
  • the holding body 42 is provided on the shaft portion 41a of the handle body 41.
  • the holding body 42 is movable on the shaft portion 41a along the longitudinal direction of the shaft portion 41a.
  • the handle 40 has an urging member (for example, a spring) (not shown), and the urging member pushes the holding body 42 downward.
  • the holding body 42 can be engaged with the first position holding member 36 and the second position holding member 37 provided on the main body frame 12. As shown in FIG. 3, the first position holding member 36 is provided on the second link L2.
  • the second position holding member 37 is provided on the first link L1.
  • the swing of the handle 40 with respect to the main body frame 12 is restricted, and the handle 40 can be maintained in the second position as shown in FIG.
  • the holding body 42 that has moved upward against the urging force of the urging member moves downward so as to cover the first position holding member 36 or the second position holding member 37, thereby moving the holding body 42. It can be engaged with the first position holding member 36 or the second position holding member 37.
  • the baby carriage body 11 having the above configuration can be folded by rotating each component relative to each other. Specifically, the handle 40 arranged at the first position is once pulled up backward and upward, and then pushed downward to rotate the fourth link L4 clockwise with respect to the rear leg 16 in FIG. Along with this operation, the first link L1 and the third link L3 rotate clockwise with respect to the second link L2 in FIG. By such an operation, the handle 40 and the front leg 14 are brought close to each other while maintaining a substantially parallel arrangement in the side view, and the position of the handle 40 can be lowered. As described above, the baby carriage main body 11 can be folded as shown in FIG. In the folded state of FIG. 4, the dimensions of the baby carriage 10 along the front-rear direction and the up-down direction can be reduced. On the other hand, in order to unfold the baby carriage main body 11 from the folded state, the procedure reverse to the above-mentioned folding operation may be performed.
  • the baby carriage main body 11 has a state maintenance mechanism (not shown) that regulates the relative rotation of the two constituent members. By operating this state maintenance mechanism, the baby carriage main body 11 can be folded.
  • the handle 40 has a remote control device 43 connected to a state maintenance mechanism. As shown in FIG. 1, the remote control device 43 is provided in the intermediate portion 41b of the handle main body 41. By operating the remote control device 43, the state maintenance mechanism operates, and the baby carriage main body 11 can be folded.
  • the baby carriage main body 11 has a pair of front legs 14, and the first caster 50 is held by each front leg 14.
  • the pair of first casters 50 have the same configuration or a configuration that is located at the center in the lateral direction and is substantially symmetrical with respect to the planes along the front-rear direction and the vertical direction.
  • the baby carriage main body 11 has a pair of rear legs 16, and a second caster 60 is held on each rear leg 16.
  • the pair of second casters 60 have the same configuration or a configuration that is located at the center in the lateral direction and is substantially symmetrical with respect to the planes along the front-rear direction and the vertical direction.
  • the first caster 50 and the second caster 60 located on the left side in the lateral direction shown in FIGS. 1 to 6 will be described.
  • the first caster 50 includes a first fixed body 51 attached to the lower end portion of the front leg 14, a first rotating body 52 rotatably supported by the first fixed body 51, and a first. It has a front wheel 56 rotatably supported by the rotating body 52.
  • the first rotating body 52 is connected to the first fixed body 51.
  • the first rotating body 52 is rotatable with respect to the first fixed body 51 about the first caster axis C1 (see FIG. 2) extending in the vertical direction.
  • the first rotating body 52 has a first facing surface SS1 facing the first fixed body 51 from below. In particular, in the illustrated example, the first rotating body 52 comes into contact with the first fixed body 51 from below on the first facing surface SS1.
  • the first fixed body 51 slides relative to the first facing surface SS1 of the first rotating body 52. ..
  • the first rotating body 52 includes a first rotating body base 53 connected to the first fixed body 51, a first rotating body holder 54 connected to the first rotating body base 53, and a first rotation. It has a first axle 55 supported by a body holder 54.
  • the first rotating body base 53 includes the first facing surface SS1.
  • the first rotating body base 53 is rotatable with respect to the first fixed body 51 about the first caster axis C1.
  • the first rotating body holder 54 may be connected to the first rotating body base 53, for example, via a cushioning material for shock absorption.
  • the illustrated first rotating body holder 54 has a connecting portion 54a connected to the first rotating body base 53 and a pair of arm portions 54b extending from the connecting portion 54a.
  • a hole into which a shaft portion extending downward from the first fixed body 51 is inserted is provided in the connecting portion 54a, and the shaft portion of the first fixed body 51 is restricted from coming out of the hole portion of the connecting portion 54a.
  • the arm portion 54b has a longitudinal direction.
  • the pair of arm portions 54b extend from the connecting portion 54a so as to be parallel to each other in the longitudinal direction and separated from each other in the direction orthogonal to the longitudinal direction.
  • the first axle 55 is supported by an end portion of the pair of arm portions 54b on the side separated from the connecting portion 54a.
  • the first axle 55 extends parallel to the traveling surface.
  • the front wheels 56 are supported on the first axle 55. Therefore, the front wheels 56 are rotatably arranged between the pair of arm portions 54b. That is, each first caster 50 has only one front wheel 56.
  • the width of the first facing surface SS1 is smaller than the width W54 of the rotating body holder 54, and the rotating body holder 54 is in the first facing surface SS1. It is located within the range where it is located. According to such an example, in the vertical projection, the first facing surface SS1 is located on the rotating body holder 54 that holds the front wheel 56. Then, the front wheel 56 is located on the first caster axis C1 of the first caster 50 in the width direction of the baby carriage 10 in the straight-ahead state. Therefore, the first rotating body 52 can stably support the first fixed body 51 via the first facing surface SS1, and thereby the running of the baby carriage can be stabilized. In the illustrated example, the width of the first facing surface SS1 coincides with the maximum width W53 of the first rotating body base.
  • the first caster 50 further has a braking member 57 operably provided on the first rotating body holder 54 that supports the front wheels 56.
  • the braking member 57 can come into contact with the front wheels 56 to regulate the rotation of the front wheels 56.
  • the illustrated braking member 57 is swingably supported by an arm portion 54b located inside the first rotating body holder 54 in the width direction.
  • the inside (inside) in the width direction is the side close to the center of the baby carriage 10 in the width direction.
  • the outer side (outer side) in the width direction is a side separated from the center of the baby carriage 10 in the width direction.
  • the second caster 60 includes a second fixed body 61 attached to the lower end portion of the rear leg 16, a second rotating body 62 rotatably supported by the second fixed body 61, and a second rotating body 62. It has a rear wheel 66 rotatably supported by a two-rotating body 62.
  • the second rotating body 62 is connected to the second fixed body 61.
  • the second rotating body 62 is rotatable with respect to the second fixed body 61 about the second caster axis C2 (see FIG. 2) extending in the vertical direction.
  • the second rotating body 62 has a second facing surface SS2 facing the second fixed body 61 from below.
  • the second rotating body 62 comes into contact with the second fixed body 61 from below on the second facing surface SS2.
  • the second fixed body 61 relatively slides on the second facing surface SS2 of the second rotating body 62. ..
  • the second rotating body 62 has a second rotating body base 63 connected to the second fixed body 61 and a second axle 65 supported by the second rotating body base 63.
  • the second rotating body base 63 includes the second facing surface SS2.
  • the second axle 65 penetrates the second rotating body base 63 and extends to both sides of the second rotating body base 63.
  • the second axle 65 extends parallel to the traveling surface.
  • the rear wheel 66 is rotatably supported by each of the portions extending from the second rotating body base 63 of the second axle 65 to both sides. That is, each first caster 50 has a pair of rear wheels 66.
  • the second rotating body base 63 is located between the pair of rear wheels 66.
  • the second caster 60 further has a braking member 67 operably provided on the second rotating body base 63 that supports the rear wheels 66.
  • the braking member 67 can come into contact with the rear wheels 66 to regulate the rotation of the rear wheels 66.
  • the illustrated braking member 67 is swingably supported by the second rotating body base 63.
  • the first caster 50 has a lock member 58 that regulates the rotation of the first rotating body 52 with respect to the first fixed body 51.
  • the lock member 58 is movable between a regulated position and a non-regulated position.
  • the lock member 58 at the regulated position protrudes from the first fixed body 51 and comes into contact with the first rotating body 52, so that the first caster axis C1 with respect to the first fixed body 51 of the first rotating body 52 is centered. It is possible to regulate the rotation.
  • the lock member 58 in the non-regulated position is separated from the first rotating body 52 and does not interfere with the rotational operation of the first rotating body 52 with respect to the first fixed body 51.
  • the second caster 60 has a lock member 68 that regulates the rotation of the second rotating body 62 with respect to the second fixed body 61.
  • the lock member 68 is movable between a regulated position and a non-regulated position.
  • the lock member 68 at the regulated position protrudes from the second fixed body 61 and comes into contact with the second rotating body 62, so that the second caster axis C2 with respect to the second fixed body 61 of the second rotating body 62 is centered. It is possible to regulate the rotation.
  • the lock member 68 in the non-regulated position is separated from the second rotating body 62 and does not interfere with the rotational operation of the second rotating body 62 with respect to the second fixed body 61.
  • the baby carriage main body 11 has a switching mechanism 45 for moving the lock members 58 and 68 between the regulated position and the non-regulated position according to the position of the handle 40.
  • the switching mechanism 45 includes a switching member 46 operably supported by the rear legs 16 and a transmission means 47 connecting between the switching member 46 and the lock members 58 and 68. ..
  • the switching member 46 comes into contact with the handle 40 as the handle 40 swings. The contact with the handle 40 can cause a relative motion such as a linear motion or a rotational motion of the switching member 46 with respect to the rear leg 16, and a relative rocking motion as a specific example.
  • the lock members 58 and 68 can be operated via the transmission means 47.
  • the rotation of the first rotating body 52 with respect to the first fixed body 51 in the first caster 50 is restricted when the handle 40 is in the second position.
  • the rotation of the second rotating body 62 with respect to the second fixed body 61 on the second caster 60 is restricted when the handle 40 is in the first position.
  • the handle 40 when the handle 40 is in the first position (the position of the handle 40 shown in FIG. 2) which is the back push position, the rotation of the first rotating body 52 of the first caster 50 is allowed, and the first The rotation of the second rotating body 62 of the 2 casters 60 is restricted.
  • the handle 40 is in the second position (the position of the handle 40 shown in FIG. 3) which is the face-to-face pushing position, the rotation of the first rotating body 52 of the first caster 50 is restricted, and the second caster 60 The rotation of the second rotating body 62 is allowed.
  • the switching mechanism 45 and the lock members 58 and 68 have various known configurations, for example, the configurations disclosed in JP-A-2008-254688, JP-A-2008-254693, JP-A-2010-234988, and the like. Can be adopted.
  • the handle 40 is swingable between the first position and the second position with respect to the main body frame 12.
  • the operator grasps the handle 40 from the back side of the infant and operates the baby carriage 10, and the infant advances.
  • the baby carriage 10 can be driven so as to face forward in the direction.
  • the front leg 14 is located in front of the baby carriage 10 in the traveling direction
  • the rear leg 16 is located behind in the traveling direction of the baby carriage 10.
  • the first rotating body 52 can rotate about the first caster axis C1 with respect to the first fixed body 51.
  • the second rotating body 62 cannot rotate with respect to the second fixed body 61 about the second caster axis C2.
  • the operator grips the handle 40 from the position on the front leg 14 side facing the baby and operates the baby carriage 10 to operate the baby carriage 10.
  • the baby carriage 10 can be driven so that the rear leg side is in front of the traveling direction.
  • the rear leg 16 is located in front of the baby carriage 10 in the traveling direction
  • the front leg 14 is located behind in the traveling direction of the baby carriage 10.
  • the first rotating body 52 cannot rotate with respect to the first fixed body 51 about the first caster axis C1.
  • the second rotating body 62 can rotate about the second caster axis C2 with respect to the second fixed body 61.
  • the possibility of switching is switched.
  • the casters 50 and 60 located in front of the baby carriage 10 in the moving direction function as casters, and the rotating bodies 52 and 62 supporting the wheels 56 and 66 rotate around the caster axes C1 and C2.
  • the casters 50 and 60 located rearward in the moving direction of the baby carriage 10 do not function as casters, and the rotation of the rotating bodies 52 and 62 supporting the wheels 56 and 66 around the caster axes C1 and C2 is restricted. Will be done.
  • the maneuverability of the baby carriage 10 of the operator can be improved.
  • the handle 40 when the handle 40 is in the first position, which is the back push position, the infant can face forward in the traveling direction. Therefore, while the baby carriage 10 is running, the infant can observe the scenery and enjoy the scenery.
  • the handle 40 When the handle 40 is in the second position, which is the face-to-face pushing position, the guardian can run the baby carriage 10 while checking the condition of the baby. For this reason, when a young infant is placed on the baby carriage 10, the handle 40 is often arranged at the second position, which is the face-to-face pushing position. For example, when the infant after sitting down is placed on the baby carriage 10. , The handle 40 tends to be arranged in the first position, which is the back push position.
  • the baby carriage 10 When a young baby is placed on the baby carriage 10, the baby carriage 10 is required to have running stability.
  • the hind legs 16 are located forward in the direction of movement.
  • the second caster 60 attached to the rear leg 16 has a twin-wheel structure and includes a pair of rear wheels 66.
  • the second caster 60 has features such as a wide ground contact area, high strength, and excellent load capacity. Therefore, when the second caster 60 is located forward in the moving direction and functions as a caster, excellent running stability is realized due to the twin-wheel structure of the second caster 60.
  • the second caster 60 having a twin-wheel structure has a pair of rear wheels 66 separated in a direction orthogonal to the traveling direction. Therefore, it is possible to effectively prevent the entire second caster 60, that is, both of the pair of rear wheels 66, from being fitted into a recess such as a groove formed on the traveling surface. That is, even if one of the rear wheels 66 of one second caster 60 is located on the recess, the other rear wheel 66 is maintained on the traveling surface so that the second caster 60 fits into the recess. Can be effectively prevented. As a result, the generation of an unintended impact can be effectively suppressed, and the running stability can be improved in this respect as well.
  • the running stability required for a certain low-monthly infant can be conveniently obtained.
  • the baby carriage 10 is required to have maneuverability (steerability, running operability). Further, as described above, the baby carriage 10 is used in a state where the handle 40 is arranged at the first position, which is the back pushing position, as the baby grows, so that the baby can enjoy going out using the baby carriage 10. Will be done.
  • the front legs 14 are located forward in the moving direction in a state where the handle 40 is arranged at the first position which is the back pushing position.
  • the first caster 50 attached to the front leg 14 has a single-wheel structure and includes only one front wheel 56.
  • the front wheel 56 can be easily rotated with respect to the first fixed body 51 together with the first rotating body 52 by the force applied to the handle 40, so that excellent maneuverability can be exhibited.
  • the second caster 60 functions as a caster located forward in the moving direction, and as a result, it tends to be mounted on the baby carriage 10.
  • the running stability required for low-monthly infants is imparted to the baby carriage 10.
  • the first caster 50 functions as a caster located forward in the moving direction, and the growth that tends to be mounted on the baby carriage 10 has progressed.
  • the maneuverability required for infants is imparted to the baby carriage 10. That is, the characteristics of the baby carriage 10 can be changed according to the arrangement of the swingable handle 40, and in particular, the required characteristics can be imparted to the baby carriage 10 according to the position of the handle 40.
  • the main body frame 12 of the illustrated baby carriage 10 has a first link L1 rotatably connected to the front legs 14 and the rear legs 16 and a second link rotatably connected to the rear end portion of the first link L1. It has a link L2, a third link L3 rotatably connected to the front leg 14, and a fourth link L4 rotatably connected to the intermediate portion of the rear leg 16.
  • the second link L2 is rotatably connected to at least one of the third link L3 and the fourth link L4.
  • the third link L3 is rotatably connected to at least one of the fourth link L4 and the second link L2.
  • the fourth link L4 is rotatably connected to at least one of the second link L2 and the third link L3.
  • the center of gravity of the baby mounted on the baby carriage 10 comes closer to the rear leg 16 than the front leg 14 in the front-rear direction.
  • the connection position (position of the shaft member 30) between the third link L3 and the fourth link L4 and the second link L2 is rearward. It is located behind the leg 16, and in particular, in such a baby carriage 10, the center of gravity of the baby is more likely to approach the rear leg 16 than the front leg 14 in the front-rear direction. Therefore, in the illustrated baby carriage 10, the weight of the infant is mainly supported by the rear legs 16 and the second casters 60 fixed to the lower ends of the rear legs 16.
  • the second caster 60 has a pair of rear wheels 66 spaced apart in the width direction. Therefore, the second caster 60 has features such as a wide ground contact area, high strength, and excellent load capacity. As a result, according to the illustrated baby carriage 10, the weight of the infant can be stably supported.
  • the position of the center of gravity of the baby placed on the baby carriage is located on the rear part of the seat support that supports the buttocks of the baby, although it depends on the reclining angle.
  • the position of the center of gravity of the baby on the baby carriage tends to be located near the connection position between the seat support and the back support that supports the back of the baby.
  • the base cloth material 34 and the frame material 24 adjusted by the base cloth material 34 form a seat support that supports the buttocks of the baby via the seat material 13.
  • the base cloth material 34 and the base frame 31 in which the base cloth material 34 is adjusted form a back support that supports the back of the infant via the seat material 13.
  • the center of gravity CG of the infant mounted on the illustrated baby carriage 10 does not depend on the position where the swingable handle 40 is held as shown in FIGS. 7A and 7B, and the frame is in the front-rear direction. It is located on the rear portion of the member 24, more precisely on the rotatable connection position between the base frame 31 and the frame member 24, that is, on the periphery of the shaft member 30. Therefore, the center of gravity CG of the infant mounted on the baby carriage 10 is closer to the rear leg 16 than the front leg 14 in the front-rear direction. Therefore, the weight of the infant can be stably supported by the second caster 60 which is attached to the rear leg 16 and includes the pair of rear wheels 66.
  • the distance LY along the front-rear direction from the center of gravity CG of the infant to the ground contact position of the rear wheel 66 is along the front-rear direction from the center of gravity CG of the infant to the ground contact position of the front wheel 56. It is shorter than the distance LX.
  • the stability of the baby carriage 10 against shaking, distortion, deformation, tilting (tilt), etc. in the width direction tends to depend on the position of the rear wheel 66 in the width direction.
  • the rear wheel 66 located outside in the width direction is on the same side (left side or right side) as the second caster 60 in the width direction. It is located outward in the width direction from the front wheel 56 of the first caster 50 located at. Therefore, the tilt angle ⁇ 2 (see FIG. 8A) of the baby carriage 10 such that the center of gravity CG of the baby is located outside the rear wheel 66 in the width direction is such that the center of gravity CG of the baby is outside the front wheel 56 in the width direction. It becomes larger than the tilt angle ⁇ 1 (see FIG. 8B) of the baby carriage 10 to be positioned. Therefore, in the illustrated baby carriage 10, the second caster 60 including the pair of rear wheels 66 exhibits excellent stability against lateral shaking, distortion, deformation, tilting (tilting), and the like. Will be.
  • the front legs 14 and the rear legs 16 are located in the regions where they overlap each other in the width direction, and the front legs 14 and the front wheels 56 of the first caster 50 are also located in the regions where they overlap each other in the width direction. Then, in the width direction, the front wheels 56 of each first caster 50 are located between the pair of rear wheels 66 of the second casters 60 located on the same side as the first caster 50 in the width direction. Therefore, while ensuring excellent stability against deformation and inclination in the width direction, it is possible to suppress the increase in size of the baby carriage 10 and impart an excellent appearance.
  • the front wheels 56 of each first caster 50 are located on the same side as the first caster 50 in the width direction in the straight-ahead state. It is located in the center of a pair of 60 rear wheels 66. Therefore, the running stability can be further improved, and excellent straightness can be exhibited.
  • the first caster axis C1 of each first caster 50 is the second caster axis of the second caster 60 located on the same side as the first caster 50 in the width direction. It is located at the same position as C2. Therefore, it is possible to improve the steerability and the running operability as well as the running stability.
  • the diameter D1 of the front wheel 56 of the first caster 50 is smaller than the diameter D2 of the rear wheel 66 of the second caster 60. According to such a first caster 50, it is possible to further facilitate the rotation of the first rotating body 52 with respect to the first fixed body 51 about the first caster axis C1. As a result, the maneuverability of the baby carriage 10 when the handle 40 is located at the first position, which is the rear push position, can be further improved.
  • the illustrated baby carriage 10 can start the folding operation from the unfolded state only when the handle 40 is arranged in the first position. Then, in the folded baby carriage 10, like the baby carriage 10 in which the handle 40 is in the first position, rotation of the first rotating body 52 and the front wheel 56 with respect to the first fixed body 51 in the first caster 50 is allowed, and the second The rotation of the second rotating body 62 and the rear wheel 66 with respect to the second fixed body 61 on the caster 60 is restricted. That is, the diameter of the front wheel 56 that can rotate about the first caster axis C1 with respect to the first fixed body 51 in the folded state is relatively small. According to such a baby carriage 10, as shown in FIG. 4, the standing posture of the baby carriage 10 in the folded state can be effectively stabilized.
  • the front wheels 56 of each first caster 50 are in the width direction with the first caster 50. It is located between a pair of rear wheels 66 of the second caster 60 located on the same side in the above.
  • the outer end in the width direction of the front wheel 56 is located inward in the width direction from the inner end in the width direction of the rear wheel 66 located outside in the width direction, and the inner end in the width direction of the front wheel 56 is inward in the width direction. It is located on the outer side in the width direction from the outer end in the width direction of the rear wheel 66 located on the side.
  • the distance S2 between the pair of rear wheels 66 in the width direction is larger than the width W1 of the front wheels 56 in the width direction. According to such a baby carriage 10, tilting of the baby carriage 10 in the width direction can be effectively suppressed, and the straight running state of the baby carriage 10 can be effectively stabilized.
  • the distance S2 between the pair of rear wheels 66 is larger than the width W51 of the first fixed body 51.
  • the distance S2 between the pair of rear wheels 66 in the width direction is larger than the width W53 of the first rotating body base 53 of the first rotating body 52 in the width direction and in the width direction.
  • the width of the first rotating body holder 54 of the first rotating body 52 is larger than the width W54.
  • the baby carriage 10 has a handle frame 12 having front legs 14 and rear legs 16 and a handle connected to the main body frame 12 so as to be swingable between the first position and the second position. It has 40, a first caster 50 attached to the front leg 14, and a second caster 60 attached to the rear leg 16.
  • the first caster 50 includes a first fixed body 51 fixed to the front leg 14, a first rotating body 52 rotatably supported by the first fixed body 51 about the first caster axis C1, and a first rotating body. It has a single front wheel 56, which is rotatably supported by 52.
  • the second caster 60 includes a second fixed body 61 fixed to the rear leg 16, a second rotating body 62 rotatably supported by the second fixed body 61 about the second caster axis C2, and a second rotation. It has a pair of rear wheels 66 rotatably supported by the body 62. Then, the rotation of the first rotating body 52 with respect to the first fixed body 51 is restricted when the handle 40 is in the second position, and the rotation of the second rotating body 62 with respect to the second fixed body 61 is such that the handle 40 is the first. It is regulated when it is in position.
  • the second caster 60 functions as a caster located forward in the moving direction, and the running stability of the baby carriage 10 can be improved.
  • the first caster 50 functions as a caster located forward in the moving direction, and the maneuverability of the baby carriage 10 can be improved. That is, the characteristics of the baby carriage 10 can be changed according to the arrangement of the swingable handle 40.
  • the width W2 of the rear wheel 66 is narrower than the width W1 of the front wheel 56 in the width direction of the baby carriage 10 in the straight running state.
  • the steering wheel 40 is placed on the first position while maintaining the running stability when the steering wheel 40 is arranged in the second position and the maneuverability when the steering wheel 40 is arranged in the first position. It is possible to improve the maneuverability in the state where the steering wheel 40 is arranged in the two positions and the running stability in the state where the steering wheel 40 is arranged in the first position.
  • the positions of the front wheel 56 of the first caster 50 and the first fixed body 51 overlap in the width direction.
  • the front wheel 56 of the first caster 50 overlaps with the first caster axis C1 in the width direction.
  • the handle 40 is arranged at the first position by increasing the height H1 of the first facing surface SS1 of the first rotating body 52 of the first caster 50. It was confirmed that the first rotating body 52 can be more easily rotated with respect to the first fixed body 51 about the caster axis C1. That is, by increasing the height H1 of the first facing surface SS1, the maneuverability in the state where the handle 40 is arranged at the first position can be further improved.
  • the rear wheel 66 of the second caster 60 is located offset from the second fixed body 61 in the width direction. Therefore, the rear wheel 66 of the second caster 60 is deviated from the second caster axis C2 in the width direction.
  • the handle 40 is arranged at the second position by lowering the height H2 of the second facing surface SS2 of the second rotating body 62 of the second caster 60. It was confirmed that the second fixed body 61 can effectively regulate the unintentional rotation of the second rotating body 62 about the caster axis C1. That is, by lowering the height H2 of the second facing surface SS2, the running stability in the state where the handle 40 is arranged at the second position can be further improved.
  • the height H1 of the first facing surface SS1 is higher than the height H2 of the second facing surface S2.
  • the height H1 of the first facing surface SS1 is equal to or larger than the diameter D1 of the front wheel 56.
  • the height H1 of the first facing surface SS1 is equal to or larger than the diameter D2 of the rear wheel 66. According to such a configuration, the maneuverability in the state where the steering wheel 40 is arranged at the first position can be improved.
  • the height H1 of the first facing surface SS1 is higher than the height H2 of the second facing surface S2.
  • the height H2 of the second facing surface SS2 is less than the diameter D1 of the front wheel 56.
  • the height H2 of the second facing surface SS1 is less than the diameter D2 of the rear wheel 66. According to such a configuration, the running stability in the state where the handle 40 is arranged at the second position can be made more excellent.
  • the baby carriage 10 can start the folding operation from the unfolded state to the folded state only when the handle 40 is arranged at the first position, but the present invention is not limited to this.
  • the baby carriage 10 may be allowed to start the folding operation only when the handle 40 is placed in the second position, or the handle 40 is placed in either the first position or the second position.
  • the baby carriage 10 may be able to start the folding operation.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Carriages For Children, Sleds, And Other Hand-Operated Vehicles (AREA)
PCT/JP2020/017225 2019-04-26 2020-04-21 乳母車 WO2020218304A1 (ja)

Priority Applications (3)

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JP2021516141A JP6915935B2 (ja) 2019-04-26 2020-04-21 乳母車
CN202110958988.2A CN113501044B (zh) 2019-04-26 2020-04-21 婴儿车

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JP2008254688A (ja) * 2007-04-09 2008-10-23 Combi Corp ベビーカー
JP2011502868A (ja) * 2007-11-13 2011-01-27 欣鼎好科技（深セン）有限公司 総合ブレーキシステムを有する後輪変向型のワゴン
JP2017100496A (ja) * 2015-11-30 2017-06-08 株式会社リッチェル 手押車

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JP5944141B2 (ja) * 2011-11-07 2016-07-05 コンビ株式会社 ベビーカー
CN203391842U (zh) * 2013-03-29 2014-01-15 好孩子儿童用品有限公司 推杆能换向的童车
JP6378991B2 (ja) * 2014-09-22 2018-08-22 コンビ株式会社 乳母車
JP5913546B2 (ja) * 2014-12-16 2016-04-27 コンビ株式会社 ベビーカー
CN106672051B (zh) * 2015-11-09 2019-07-19 广东三泰隆科技有限公司 一种新型可折叠式婴儿车
JP3202222U (ja) * 2015-11-09 2016-01-28 晃一 中川 機内持ち込み可能なベビーカー
CN106672061B (zh) * 2017-02-14 2023-03-14 中山市特凯斯婴童用品有限公司 可换向推动的儿童收合伞车
US10946885B2 (en) * 2017-09-07 2021-03-16 Yuanzhen XIANG Multi-function pet stroller
CN207955752U (zh) * 2017-12-25 2018-10-12 好孩子儿童用品有限公司 一种儿童推车

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Publication number Priority date Publication date Assignee Title
JPH0467570U (zh) * 1990-10-22 1992-06-16
JPH11291917A (ja) * 1998-02-26 1999-10-26 Team Tex ベビ―カ―、その車台及び座席
JP2008254688A (ja) * 2007-04-09 2008-10-23 Combi Corp ベビーカー
JP2011502868A (ja) * 2007-11-13 2011-01-27 欣鼎好科技（深セン）有限公司 総合ブレーキシステムを有する後輪変向型のワゴン
JP2017100496A (ja) * 2015-11-30 2017-06-08 株式会社リッチェル 手押車

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JP6915935B2 (ja) 2021-08-11
JPWO2020218304A1 (ja) 2021-09-13
CN112969625B (zh) 2022-05-10
JP2021165134A (ja) 2021-10-14
JP6938071B1 (ja) 2021-09-22
CN113501044A (zh) 2021-10-15
CN112969625A (zh) 2021-06-15
TW202042716A (zh) 2020-12-01
CN113501044B (zh) 2023-08-04

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