Abstract: In the vehicle seat, rear suspension members are provided at two positions spaced away from each other in a lateral direction on an edge of a seat cushion near a seatback, and support the seat cushion while the seat cushion is suspended from a seat cushion support frame so that the seat cushion is movable in the lateral direction. A front suspension member is provided at one position or two positions spaced away from each other in the lateral direction on ahead of the rear suspension members, and supports the seat cushion while the seat cushion is suspended from the seat cushion support frame so that the seat cushion is movable in the lateral direction.

Abstract: Provided is a vertebral spacer including a columnar main-body portion attached to individual cut end portions of the cut vertebral arch by screws, wherein the main-body portion is provided with two accommodating holes formed inside the main-body portion at positions spaced in a longitudinal direction of the main-body portion, and individually accommodating head portions of the screws, the individual accommodating holes are provided with openings through which the head portions are inserted into the accommodating holes from outside the main-body portion, and the openings have diameters greater than diameters of shaft portions of the screws, smaller than diameters of the head portions, and increased to a size that is greater than the diameters of the head portions.

Abstract: A headrest is supported by an upper lateral member and a lower lateral member of a seat frame. A headrest stay is inserted through each of guide slots, both of which are formed in both the upper lateral member and the lower lateral member, and an extension wire is hooked on a lower end of the headrest stay. In a rear-collision, a seat back is retreated by a force received from a seated passenger, and a tension of the tension wire is accordingly loosened, which causes the headrest to be tilted forward by an urging force of tilt springs.

Abstract: A headrest is supported by an upper lateral member and a lower lateral member of a seat frame. A headrest stay is inserted through each of guide slots, both of which are formed in both the upper lateral member and the lower lateral member, and an extension wire is hooked on a lower end of the headrest stay. In a rear-collision, a seat back is retreated by a force received from a seated passenger, and a tension of the tension wire is accordingly loosened, which causes the headrest to be tilted forward by an urging force of tilt springs.

Abstract: In the vehicle seat, rear suspension members are provided at two positions spaced away from each other in a lateral direction on an edge of a seat cushion near a seatback, and support the seat cushion while the seat cushion is suspended from a seat cushion support frame so that the seat cushion is movable in the lateral direction. A front suspension member is provided at one position or two positions spaced away from each other in the lateral direction on ahead of the rear suspension members, and supports the seat cushion while the seat cushion is suspended from the seat cushion support frame so that the seat cushion is movable in the lateral direction.

Abstract: Provided is a vertebral spacer including a columnar main-body portion attached to individual cut end portions of the cut vertebral arch by screws, wherein the main-body portion is provided with two accommodating holes formed inside the main-body portion at positions spaced in a longitudinal direction of the main-body portion, and individually accommodating head portions of the screws, the individual accommodating holes are provided with openings through which the head portions are inserted into the accommodating holes from outside the main-body portion, and the openings have diameters greater than diameters of shaft portions of the screws, smaller than diameters of the head portions, and increased to a size that is greater than the diameters of the head portions.