公开(公告)号：US12230300B2

公开(公告)日：2025-02-18

申请号：US17335472

申请日：2021-06-01

Applicant: NHK SPRING CO., LTD.

Inventor： Sosuke Kurebayashi ,  Yohei Mitsumori ,  Naoki Iwamoto

IPC: G11B5/48

Abstract: A load beam includes a pair of flange bending parts including first bending parts, and a second bending part extending in a width direction. A first cross-section part extends in the width direction of the load beam passing through welding parts. The first cross-section part is warped up toward the flange parts. A second cross-section part extends in the width direction passing through a different position from that of the welding parts. The second cross-section part has a lesser height difference as compared to the first cross-section part. A die is used when bending the second bending part. The die includes a first relief part including a first inclined surface and a second relief part including a second inclined surface in both sides of the supporting surface.