Nhk Spring Co., Ltd.

Mitsuteru Mimura

Norihiro Tajima

Toshimitsu Araki

Shuji Takahashi

Yosuke Kawai

A seat member has a seat portion, a receiving surface of which comes into contact with a bearing surface of an end turn portion, a mounting shaft portion protruded from the receiving surface of the seat portion, and an enlarged diameter portion formed at the front end of the mounting shaft portion for guiding press-fitting, in a cross section along an axial direction of a coil spring, an outer diameter of the enlarged diameter portion is set larger than an inner diameter of the end turn portion and an axial length of the enlarged diameter portion is set so that at least a maximum diagonal length of the seat member is larger than an inter-element wire distance.

Coil spring assembly

A tolerance ring includes a base formed of a strip-like member approximately wound around into a ring shape, and a plurality of projections provided along a winding direction of the base so as to protrude in a radial direction from an outer peripheral surface of the base, wherein each of the projections has edges serving as a boundary with the base and at least one of the edges in a width direction orthogonal to the winding direction has a shape intersecting the winding direction.

Tolerance ring

A tolerance ring has a ring shape formed of a plate-shaped member substantially into a circle along a predetermined direction and includes a plurality of convex portions protruding in a radial direction, and a notch portion notched in a direction orthogonal to a circumferential direction on at least one of outer edge side end portions in the direction orthogonal to the circumferential direction.

Tolerance ring, hard disk device, and method for manufacturing hard disk device

A tolerance ring is formed of a plate member, in a ring shape that is substantially circular along a predetermined direction, and provided with a plurality of protrusions projected radially in a circumferential direction, wherein an even number of the protrusions are arranged along the circumferential direction, and a plurality of straight lines that pass through a central portion of the plurality of protrusions and a center of a circle that circumscribes the tolerance ring cross one another.

Growing community of inventors

Kanagawa, Japan

Mitsuteru Mimura