Abstract: A supporting projection is formed on a resin base plate on which a seat winding portion of a coil spring is fitted. The supporting projection has such rigidity that a distal end portion does not deflect against a spring force applied radially inwards from the seat winding portion of the coil spring. On the other hand, an elastic deflectable area which deflects elastically by the spring force applied radially outwards from the seat winding portion of the coil spring is formed in an area which extends from a proximal end to the distal end portion of the supporting projection.

Abstract: A spring assembly includes a substrate, an inner coil spring, and an outer coil spring arranged outside the inner coil spring. One of the inner coil spring and the outer coil spring includes an end turn portion, the end turn portion forming a support wall for an other of the inner coil spring and the outer coil spring.

Abstract: A spring assembly includes a substrate, an inner coil spring, and an outer coil spring arranged outside the inner coil spring. One of the inner coil spring and the outer coil spring includes an end turn portion, the end turn portion forming a support wall for an other of the inner coil spring and the outer coil spring.

Abstract: According to one embodiment, a spring assembly includes: a substrate; a coil spring having an end turn portion fixed to the substrate; an inner wall provided at an inner peripheral side of the coil spring; and an outer wall provided at an outer peripheral side of the coil spring, wherein one of the inner wall and the outer wall forms a spring fixing wall configured to prevent the end turn portion of the coil spring from coming off in an axial direction of the coil spring, and wherein the other of the inner wall and the outer wall forms a support wall configured to prevent the end turn portion of the coil spring from moving in a radial direction of the coil spring.

Abstract: A supporting projection is formed on a resin base plate on which a seat winding portion of a coil spring is fitted. The supporting projection has such rigidity that a distal end portion does not deflect against a spring force applied radially inwards from the seat winding portion of the coil spring. On the other hand, an elastic deflectable area which deflects elastically by the spring force applied radially outwards from the seat winding portion of the coil spring is formed in an area which extends from a proximal end to the distal end portion of the supporting projection.

Abstract: According to one embodiment, a spring assembly includes: a substrate; a coil spring having an end turn portion fixed to the substrate; an inner wall provided at an inner peripheral side of the coil spring; and an outer wall provided at an outer peripheral side of the coil spring, wherein one of the inner wall and the outer wall forms a spring fixing wall configured to prevent the end turn portion of the coil spring from coming off in an axial direction of the coil spring, and wherein the other of the inner wall and the outer wall forms a support wall configured to prevent the end turn portion of the coil spring from moving in a radial direction of the coil spring.

Abstract: A manufacturing method of a spring assembly, assembles an annular plate and a compression coil spring. The method includes forming a protrusion having a tapered portion on the annular plate, and inserting a punch including a first portion having a larger diameter than an inner diameter of a tip end of the tapered portion from the tip end side into the protrusion to expand the tip end of the tapered portion. The expansion of the tip end of the tapered portion involves expanding a base portion of the protrusion, which extends the tapered portion and has a larger inner diameter than that of the tip end of the tapered portion, along a surface of an end turn of the compression coil spring.

Abstract: Large-diameter projection portions and small-diameter projection portions are formed in each of the two annular plates, while large-diameter end turn portions, which are respectively associated with large-diameter projection portions, and small-diameter end turn portions, which are respectively associated with small-diameter projection portions, are formed in the compression coil springs. Then, a punch having a diameter portion, whose diameter is larger than the inside diameter of the large-diameter projection portion, is inserted thereinto and increases the diameter thereof. Consequently, the large-diameter end turn portions of the compression coil springs are assembled to each of the annular plates.

Abstract: A method of manufacturing a spring assembly, which includes two annular plates and compression coil springs, and which is adapted so that the compression coil springs are assembled to the annular plates by caulking projection portions formed on the two annular plates, respectively. Projection portions are formed at the side of the annular plates. Plural large-diameter walls and plural small-diameter walls are alternately provided in the circumferential direction of each of the projection portions. A punch having a portion, whose diameter is larger than the inside diameter of a space between the small-diameter walls, is inserted into an inner space among the large-diameter walls and the small-diameter walls of each of the projection portions. As the small-diameter walls of each of the projection portions are enlarged in diameter, the large-diameter walls adjoining each of these small-diameter walls are easily enlarged in diameter.

Abstract: Large-diameter projection portions and small-diameter projection portions are formed in each of the two annular plates, while large-diameter end turn portions, which are respectively associated with large-diameter projection portions, and small-diameter end turn portions, which are respectively associated with small-diameter projection portions, are formed in the compression coil springs. Then, a punch having a diameter portion, whose diameter is larger than the inside diameter of the large-diameter projection portion, is inserted thereinto and increases the diameter thereof. Consequently, the large-diameter end turn portions of the compression coil springs are assembled to each of the annular plates.

Abstract: It is a method of manufacturing a spring assembly, which includes two annular plates and compression coil springs, and which is adapted so that the compression coil springs are assembled to the annular plates by caulking projection portions formed on the two annular plates, respectively. Projection portions are formed at the side of the annular plates. Plural large-diameter walls and plural small-diameter walls are alternately provided in the circumferential direction of each of the projection portions. A punch having a portion, whose diameter is larger than the inside diameter of a space between the small-diameter walls, is inserted into an inner space among the large-diameter walls and the small-diameter walls of each of the projection portions. As the small-diameter walls of each of the projection portions are enlarged in diameter, the large-diameter walls adjoining each of these small-diameter walls are easily enlarged in diameter.

Abstract: A manufacturing method of a spring assembly, assembles an annular plate and a compression coil spring. The method includes forming a protrusion having a tapered portion on the annular plate, and inserting a punch including a first portion having a larger diameter than an inner diameter of a tip end of the tapered portion from the tip end side into the protrusion to expand the tip end of the tapered portion. The expansion of the tip end of the tapered portion involves expanding a base portion of the protrusion, which extends the tapered portion and has a larger inner diameter than that of the tip end of the tapered portion, along a surface of an end turn of the compression coil spring.