TONGUE AND SEAT BELT DEVICE USING THE SAME

摘要

[Object] Smooth sliding against a seat belt is allowed in a normal state, and effectiveness of suppressing extension of a lap belt is increased in an emergency state.;[Solution] A seat belt slide portion 17 has a recess portion 20 provided in a seat belt slide surface 18 and a specified number of projections 27 provided in the recess portion 20. The seat belt slide surface 18 has a shoulder belt-side seat belt slide surface 22 that is disposed on a shoulder belt 9 side and extends in a longitudinal direction of a seat belt insertion hole 16. Relative to a position where the distance in a direction perpendicular to or substantially perpendicular to the longitudinal direction of the seat belt insertion hole 16 is a minimum, the shoulder belt-side seat belt slide surface 22 extends from the shoulder belt 9 side to a lap belt 10 side, and the distance of a part 22a of the shoulder belt-side seat belt slide surface 22 is positioned on the lap belt 10 side relative to the position of a virtual line α.

主权项

1. A tongue that is slidably supported by a seat belt, separates the seat belt into a shoulder belt and a lap belt, and has an engagement portion engageable with a buckle, the tongue has
a seat belt insertion hole that is provided so as to be elongated in a direction perpendicular to or substantially perpendicular to the engagement portion and allows the seat belt to be inserted therethrough; and a seat belt slide portion that forms part of the seat belt insertion hole and has a seat belt slide surface against which the seat belt slides, wherein the seat belt slide portion has a specified number of recess portions provided in the seat belt slide surface, and a specified number of projections are separately provided in the recess portions, wherein the seat belt slide surface at least has a shoulder belt-side seat belt slide surface that is disposed on a shoulder belt side and extends in a longitudinal direction of the seat belt insertion hole, and wherein, relative to a position where the distance in a direction perpendicular to or substantially perpendicular to the longitudinal direction of the seat belt insertion hole is a minimum, the shoulder belt-side seat belt slide surface extends from the shoulder belt side to a lap belt side, and part of the shoulder belt-side seat belt slide surface is positioned on the lap belt side relative to the position where the distance is the minimum.