초록 ▼

The folding baby carriage is foldable so that four wheels approach each other back and forth and from side to side. The baby carriage includes a lower frame structure that is positioned above the four wheels to form a seating surface portion of a seat and that is foldable so as to approach back and

The folding baby carriage is foldable so that four wheels approach each other back and forth and from side to side. The baby carriage includes a lower frame structure that is positioned above the four wheels to form a seating surface portion of a seat and that is foldable so as to approach back and forth and from side to side with the four wheels, and an inverted U-shaped member extending to rise upward from both sides of the seating surface portion. The inverted U-shaped member remains on a single plane in both the folded state and the opened state without bending out of this plane, but lower ends of the inverted U-shaped member come closer together in the folded state.

대표청구항 ▼

What is claimed is: 1. A folding baby carriage that comprises four wheels and that is foldable from an unfolded opened state to a folded state whereby the four wheels thereof approach each other back and forth and from side to side, further comprising: a lower frame structure that is positioned ove

What is claimed is: 1. A folding baby carriage that comprises four wheels and that is foldable from an unfolded opened state to a folded state whereby the four wheels thereof approach each other back and forth and from side to side, further comprising: a lower frame structure that is positioned over the four wheels to form a seating surface portion of a seat, and that is foldable from said opened state to said folded state so as to approach back and forth and from side to side with said four wheels; and an inverted U-shaped member that comprises two upwardly extending bars which extend upward from two sides of said seating surface portion; wherein said inverted U-shaped member remains on a single plane both in said opened state and in said folded state without being bent out of said plane, said two upwardly extending bars respectively have two upper ends that remain a same distance apart from one another in both said opened state and said folded state, and said two upwardly extending bars respectively have two lower ends that are arranged and adapted to be closer together to one another in said folded state and farther apart from one another in said opened state. 2. The folding baby carriage according to claim 1, wherein said inverted U-shaped member further comprises a middle bar member to which said upper ends of said upwardly extending bars are connected in a state in which a three-dimensional relative movement thereof is restricted. 3. The folding baby carriage according to claim 2, wherein said middle bar member has a respective peripheral wall receiving an edge of a respective one of said upper ends and restricting back-and-forth and up-and-down movements thereof. 4. The folding baby carriage according to claim 3, further comprising a pin extending in a back-and-forth direction and connecting said middle bar member and a respective one of said upper ends. 5. The folding baby carriage according to claim 2, wherein in said opened state, said two upwardly extending bars include lower regions extending parallel to each other from said lower ends to a predetermined height, upper regions extending upwardly from said predetermined height and slanting closer together toward said upper ends, and horizontal regions extending inward from upper portions of said upper regions in a width direction and terminating at said upper ends, and said middle bar member connects said inner ends of said horizontal regions. 6. The folding baby carriage according to claim 5, wherein said inverted U-shaped member is a push bar for moving the baby carriage, said inverted U-shaped member further includes cover members covering respective bar portions extending from said horizontal regions to said upper regions, and said cover members respectively have projections protruding outward. 7. The folding baby carriage according to claim 6, wherein a distance between said projections positioned at right and left sides is almost the same as a length between outer sides of right and left wheels of said four wheels in the folded state. 8. The folding baby carriage according to claim 1, wherein said inverted U-shaped member further comprises an upper end lateral bar connecting together said upper ends of said upwardly extending bars, and wherein said upper end lateral bar allows a slight deflection of said upwardly extending bars so that said two lower ends come closer together in said folded state than in said opened state while always remaining in said plane. 9. The folding baby carriage according to claim 8, wherein in said opened state, said two upwardly extending bars include lower regions extending parallel to each other from said lower ends to a predetermined height and upper regions extending upwardly from said predetermined height and slanting closer together toward said upper ends. 10. The folding baby carriage according to claim 9, wherein a length of a part of said upper end lateral bar connecting said upper ends of said upwardly extending bars is almost the same as a length between outer sides of right and left wheels of said four wheels in said folded state. 11. The folding baby carriage according to claim 8, wherein said lower frame structure has a connection structure that is connected to said lower ends and that allows inclination of said upwardly extending bars in accordance with a transition from said opened state to said folded state. 12. The folding baby carriage according to claim 8, wherein said lower frame structure comprises: a pair of handrail members positioned above two sides of the seating surface portion, and a connection axis turnably connecting a rear end of a respective one of said handrail members and a respective one of said upwardly extending bars, and wherein said handrail member includes an abutting wall surface opposed to said respective upwardly extending bar through said connection axis, said abutting wall surface passing said connection axis and abutting on said respective upwardly extending bar, and separated wall surfaces positioned above and below said abutting wall surface and forming a clearance with said respective upwardly extending bar. 13. The folding baby carriage according to claim 8, wherein said lower frame structure comprises: a rear leg having a rear wheel of said four wheels; an inverting member turnably connected to said rear leg through a connection pin, provided along said rear leg above said connection pin in said opened state, and provided along said rear leg below said connection pin in said folded state; and a connection axis turnably connecting an edge of said inverting member and a respective one of said upwardly extending bars, and wherein said inverting member includes an abutting wall surf ace opposed to said respective upwardly extending bar through said connection axis, said abutting wall surface passing said connection axis and abutting on said respective upwardly extending bar, and separated wail surfaces positioned above and below said abutting wall surface and forming a clearance with said respective upwardly extending bar. 14. The folding baby carriage according to claim 1, wherein said lower frame structure comprises a pair of seating surface supporting side bars extending in a back-and-forth direction along two sides of said seating surface portion in order to support a seating surface member from beneath, wherein each one of said seating surface supporting side bars integrally has an inward extending portion extending toward an inside so as to support said seating surface member from beneath. 15. The folding baby carriage according to claim 14, wherein said inward extending portion extends from a rear part of said seating surface supporting side bar to the inside. 16. The folding baby carriage according to claim 14, wherein said inward extending portion is formed by bending a rear end portion of said seating surface supporting side bar to the inside in a shape of a horseshoe. 17. The folding baby carriage according to claim 14, wherein said seating surface member comprises a plate-shaped seating surface core, and wherein said seating surface core is connected to said pair of seating surface supporting side bars. 18. The folding baby carriage according to claim 17, wherein said seating surface core is connected to said inward extending portions of said pair of seating surface supporting side bars. 19. The folding baby carriage according to claim 17, further comprising a bending link member connecting front portions of said pair of seating surface supporting side bars, wherein said bending link member has a center link bar and a pair of side link bars provided so as to be allowed to be bent, and said seating surface core is connected to said center link bar. 20. A folding baby carriage comprising a lower frame structure positioned over four wheels to form a seating surface portion of a seat, in which said lower frame structure is foldable from an unfolded opened state to a folded state, and further comprising: a push bar for moving said baby carriage; and an inverted U-shaped member that is separate from said pushbar, and that comprises two upwardly extending bars which extend upward from two sides of said seating surface portion; wherein said inverted U-shaped member remains on a single plane both in said opened state and in said folded state without being bent out of said plane, said two upwardly extending bars respectively have two upper ends that remain a same distance apart from one another in both said opened state and said folded state, and said two upwardly extending bars respectively have two lower ends that are arranged and adapted to be closer together to one another in said folded state and farther apart from one another in said opened state. 21. The folding baby carriage according to claim 20, wherein said push bar is provided so as to be changeable between a state pushed from behind and a state pushed face-to-face. 22. The folding baby carriage according to claim 20, wherein said lower frame structure includes a pair of handrail members positioned above two sides of said seating surface portion, and said inverted U-shaped member extends to rise upward from a rear end of said pair of handrail members. 23. The folding baby carriage according to claim 20, wherein said inverted U-shaped member is a frame for supporting a backrest portion of said seat. 24. The folding baby carriage according to claim 20, wherein said inverted U-shaped member is a part of a roof for shade.