| 摘要 |
In a seat belt device which restrains an occupant to a seat, a tongue plate includes a belt through portion in which a webbing pass-through opening which allows a webbing to pass therethrough is formed and an engaging portion which is engaged with a buckle, and the shape of the webbing pass-through opening includes a straight line portion which is linear in the webbing width direction and has an approximately constant width in the webbing thickness direction and first and second bent portions which have the approximately same width as the width of the straight line portion and respectively extend in the oblique direction from both ends of the straight line portion toward a buckle engaging portion side.
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