Patent ID: 9205768
Filing Date: 2015-12-08
Classification: B60N

Abstract:
1. A seat in a means of transportation, comprising a lower part for supporting a posterior and thighs of an occupant, and a rear part for supporting the posterior, back and head of the occupant, the lower part having a rigid seat cushion structure and padding, the rear part having a rigid seat back structure and padding, the seat back structure being die cast to define a unitary member, a lower end region of the seat back structure being mounted in the seat cushion structure, the rigid seat back structure having first and second side parts having front surfaces disposed in a common plane, each of the side parts having opposite upper and lower end regions, the lower end regions of the side parts being connected to the rigid seat cushion structure of the lower part, the side parts converging toward one another from the lower end regions toward the upper end regions, rigid upper and lower crosspieces connecting the side parts, the upper crosspiece connecting the upper end regions of the two side parts to each other, and the lower crosspiece connecting the two side parts at a distance from the lower ends thereof at positions approximately within a range of ¼ to ⅓ of a length of the respective side part, as calculated from the lower end thereof, a head restraint mounted above the upper crosspiece for supporting the head of the occupant, the upper and lower crosspieces having front surfaces extending continuously from the first side part to the second side part and all of the front surfaces of the upper and lower cross pieces between the first and second side parts being arranged in the common plane with front surfaces of the first and second side parts, the lower crosspiece being arranged sufficiently above a region of the rear part that supports the posterior of the occupant to define a space of substantially trapezoidal shape that permits the posterior of the occupant to be wedged between the converging side parts, the lower cross piece and the rigid seat cushion structure of the lower part in the event of a rear end collision so that a position of the head of the occupant does not move up beyond the head restraint for substantially preventing whiplash injuries in the event of the rear end collision.