| 摘要 |
PROBLEM TO BE SOLVED: To provide a dovetail structure for increasing an amount of absorbing seat displacement and hardly dropping out while fitting. SOLUTION: A bracket 51 of a seat leg 31 is provided with a dovetail male 61 extended toward a front wall surface 52 of a swivel upper 23. A position on the front wall surface 52 opposing to the dovetail male 61 in a storing state 41 is provided with a dovetail female 62. An upper side surface 101 of the dovetail male 61 is composed of a base end side upper side surface 102 forming a holding part 91 and a tip side upper side surface 103 forming an introduction part 92. A taper value at the holding part 91 is set to be different from a taper value at the introduction part 92 in the dovetail male 61. The taper value at the holding part 91 is set to be smaller than the taper value at the introduction part 92. COPYRIGHT: (C)2009,JPO&INPIT
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