| 摘要 |
A seat core (20) continuously comprises a backrest surface portion (21) supporting a back of a child from behind, a seating surface portion (22) supporting buttocks of the child from beneath, a leg-supporting surface portion (23) supporting legs of the child in a state of bed, a first hinge portion (24) positioned between the backrest surface portion (21) and the seating surface portion (22), and a second hinge portion (25) positioned between the seating surface portion (22) and the leg-supporting surface portion (23). <IMAGE>
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