| 摘要 |
PROBLEM TO BE SOLVED: To achieve an effective structure making a lumbar support body part reserve soft movability even if the body part is integrally formed with a support part. SOLUTION: Two positions of the lumbar support body part 31 for resting the waist of an occupant are backed up by a back frame 1 via the support part 32 integrally formed with the body part 31. Right and left grooves 3x are provided between the parts 31 and 32 in each of two positions. Contrarily expanding/contracting each groove 3x is able to swing the body part 31. COPYRIGHT: (C)2008,JPO&INPIT
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