公开(公告)号：US20220347531A1

公开(公告)日：2022-11-03

申请号：US17776634

申请日：2021-10-27

Applicant: NHK SPRING CO., LTD.

Inventor： Akihisa INOUE

IPC: A63B53/12 ,  C25D5/00 ,  C25D5/14 ,  C25D7/04 ,  C25D3/04 ,  C25D3/12

Abstract: Provided is a golf shaft, capable of ensuring peeling resistance of a colored layer to endure a bending process and the like. The golf shaft has a metal element tube, and a colored plating layer being a colored layer formed on a surface of the element tube, wherein the colored plating layer has a first strike plating layer on the element tube side, a satin-like plating layer layered on a surface of the first strike plating layer, a second strike plating layer layered on a surface of the stain-like plating layer, and a decorative plating layer layered on a surface of the second strike plating layer and colored according to a color of the colored plating layer.

公开(公告)号：US20220111271A1

公开(公告)日：2022-04-14

申请号：US17298179

申请日：2019-10-18

Applicant: NHK SPRING CO., LTD.

Inventor： Kosuke FUJIWARA ,  Akihisa INOUE

IPC: A63B53/10

Abstract: Provided is a golf shaft, capable of ensuring bending rigidity required for a golf club and providing good hit feeling in a composite shaft with 50 g-130 g. The golf shaft comprises an element tube made of metal, an outer layer made of a fiber reinforced plastic and covering an outer periphery of the element tube over an entire length of the element tube in an axial direction, an adhesive layer interposed between the element tube and the outer layer to bond between the element tube and the outer layer, wherein weight of a whole including the element tube, the outer layer, and the adhesive layer is 50 g-130 g, and weight of the element tube is 50%-90% of the weight of the whole.