Abstract: A suspension coil spring includes a lower end turn portion, an upper end turn portion, and a helical effective portion formed between the end turn portions. The lower end turn portion includes a first portion which contacts a lower spring seat irrespective of a load, and a second portion which contacts the lower spring seat or is separated from the same according to the load. The wire diameter of the second portion is greater than that of the first portion and an average wire diameter of the effective portion. The upper end turn portion includes a third portion which contacts an upper spring seat, and a fourth portion. The wire diameter of the fourth portion is greater that of the third portion and the average wire diameter of the effective portion.

Abstract: A strut-type suspension includes a compression coil spring, a lower spring seat, an upper spring seat, and a shock absorber. The compression coil spring is disposed at a position offset to the outer side of a vehicle with respect to the shock absorber. The compression coil spring is mounted in a vehicle body in such a state that it is compressed between spring seats. The compression coil spring includes a large-diameter wire portion and a small-diameter wire portion. The large-diameter wire portion is provided in a vehicle inner-side portion of the compression coil spring. The small-diameter wire portion is provided in a vehicle outer-side portion. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.

Abstract: A knee-action-type suspension is provided with an arm member, a compression coil spring, and a shock absorber. The coil spring is extended and retracted between a full-rebound state and a full-bump state in accordance with the magnitude of a load applied to a vehicle body. A wire of the coil spring includes a large-diameter wire portion, a small-diameter wire portion, and a wire diameter varying portion. The large-diameter wire portion is provided in a first portion of the coil spring, which is on the side near to a pivot. The small-diameter wire portion is provided in a second portion of the coil spring, which is on the side far from the pivot. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.

Abstract: A suspension coil spring includes a lower end turn portion, an upper end turn portion, and a helical effective portion formed between the end turn portions. The lower end turn portion includes a first portion which contacts a lower spring seat irrespective of a load, and a second portion which contacts the lower spring seat or is separated from the same according to the load. The wire diameter of the second portion is greater than that of the first portion and an average wire diameter of the effective portion. The upper end turn portion includes a third portion which contacts an upper spring seat, and a fourth portion. The wire diameter of the fourth portion is greater that of the third portion and the average wire diameter of the effective portion.

Abstract: A strut-type suspension includes a compression coil spring, a lower spring seat, an upper spring seat, and a shock absorber. The compression coil spring is disposed at a position offset to the outer side of a vehicle with respect to the shock absorber. The compression coil spring is mounted in a vehicle body in such a state that it is compressed between spring seats. The compression coil spring includes a large-diameter wire portion and a small-diameter wire portion. The large-diameter wire portion is provided in a vehicle inner-side portion of the compression coil spring. The small-diameter wire portion is provided in a vehicle outer-side portion. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.

Abstract: A knee-action-type suspension is provided with an arm member, a compression coil spring, and a shock absorber. The coil spring is extended and retracted between a full-rebound state and a full-bump state in accordance with the magnitude of a load applied to a vehicle body. A wire of the coil spring includes a large-diameter wire portion, a small-diameter wire portion, and a wire diameter varying portion. The large-diameter wire portion is provided in a first portion of the coil spring, which is on the side near to a pivot. The small-diameter wire portion is provided in a second portion of the coil spring, which is on the side far from the pivot. A wire diameter of the large-diameter wire portion is greater than a wire diameter of the small-diameter wire portion.

Abstract: A guide structure of a vehicle seatbelt includes a belt guide. The belt guide is provided at one of a left corner and a right corner defined by a left side frame, a right side frame, and an upper frame. The one corner faces a belt pulled out from a seatbelt device. The left side frame and the right side frame extend vertically. The upper frame connects an upper end of the left side frame to an upper end of the right side frame. The belt guide protrudes upwardly with respect to the upper frame and forwardly with respect to the left side frame and the right side frame so that when the belt is placed on an occupant who sits on the seat, a portion of the belt that is placed on a shoulder of the occupant is guided by the belt guide.

Abstract: An arrangement structure for a duct is provided, enabling formation of an air intake opening of the duct such as to be widely open on the side of a seatback and improvement in strength of a striker holding the seatback. The arrangement structure includes a vehicle seat with a seatback and a lock mechanism provided on the seatback and engaging with a striker supported on a vehicle sidewall to lock the seatback at a standing position; and the duct provided on the side of the seatback, extending in the up and down direction and flowing air. The striker has an inclined portion extending from the engaging position of the seatback and the lock mechanism toward outside with respect to a vehicle lateral direction and toward the vehicle rear side. The duct is disposed on the side of the seatback and on the front side of the inclined portion.

Abstract: A compression coil spring device suitable for use in a strut wheel suspension system. The device includes a coil wire wound into a coil having an end turn. The end turn of the coil, and only the end turn of the coil, is provided with a plurality of projections along the length thereof, with the remainder of the coil wire being substantially free of projections.

Abstract: A guide structure of a vehicle seatbelt includes a belt guide. The belt guide is provided at one of a left corner and a right corner defined by a left side frame, a right side frame, and an upper frame. The one corner faces a belt pulled out from a seatbelt device. The left side frame and the right side frame extend vertically. The upper frame connects an upper end of the left side frame to an upper end of the right side frame. The belt guide protrudes upwardly with respect to the upper frame and forwardly with respect to the left side frame and the right side frame so that when the belt is placed on an occupant who sits on the seat, a portion of the belt that is placed on a shoulder of the occupant is guided by the belt guide.

Abstract: An arrangement structure for a duct is provided, enabling formation of an air intake opening of the duct such as to be widely open on the side of a seatback and improvement in strength of a striker holding the seatback. The arrangement structure includes a vehicle seat with a seatback and a lock mechanism provided on the seatback and engaging with a striker supported on a vehicle sidewall to lock the seatback at a standing position; and the duct provided on the side of the seatback, extending in the up and down direction and flowing air. The striker has an inclined portion extending from the engaging position of the seatback and the lock mechanism toward outside with respect to a vehicle lateral direction and toward the vehicle rear side. The duct is disposed on the side of the seatback and on the front side of the inclined portion.

Abstract: In a compression coil spring device, suitable for use in a strut wheel suspension system, including a coil wire wound into a coil having an end turn, the end turn is adapted to be supported by a spring seat at one or a plurality of discrete points. This can be accomplished either by providing a plurality of projections on the coil wire along the length of the coil wire of the end turn, with the remainder of the coil wire being substantially free of projections, or by providing a plurality of projections for supporting the end turn at one or a plurality of discrete points of the spring seat. Thus, the spring demonstrates the same property with regard to the centroid of contact pressure or line of action of the spring force, and the spring constant, without regard to the spring load as long as the spring end is supported by the same discrete contact point or points.

Abstract: In a compression coil spring device, suitable for use in a strut wheel suspension system, including a coil wire wound into a coil having an end turn, the end turn is adapted to be supported by a spring seat at one or a plurality of discrete points. This can be accomplished either by providing a plurality of projections on the coil wire along the length of the coil wire of the end turn or by providing a plurality of projections for supporting the end turn at one or a plurality of discrete points of the spring seat. Thus, the spring demonstrates a same property with regard to the centroid of contact pressure or line of action of the spring force, and the spring constant without regard to the spring load as long as the spring end is supported by the same discrete contact point or points.