公开(公告)号：US20130217513A1

公开(公告)日：2013-08-22

申请号：US13773107

申请日：2013-02-21

Applicant: K.K. Endo Seisakusho

Inventor： Junichi AMANO ,  Toru TAMAKI

IPC: A63B53/04

CPC classification number: A63B53/04 ,  A63B53/047 ,  A63B60/00 ,  A63B2053/0445 ,  A63B2225/60 ,  B41M5/24

Abstract: There is provided a golf club head capable of reliably preventing a backspin rate from varying in rainfall. A plurality of fine grooves are formed on a face surface 2. When observing a cross-sectional surface perpendicular to the face surface 2 involving a vertical line passing through the center G of gravity of the golf club head 1 with the golf club head 1 set at preset loft and lie angles, an average width of the fine grooves 4 in the cross-sectional surface is 100 μm or less and an average pitch thereof in the cross-sectional surface is 100 μm or less. Hence, the discharge of water can be accelerated by a capillary phenomenon, making it possible to reliably prevent a backspin rate of a golf ball from varying in rainfall.

Abstract translation: 提供了一种可以可靠地防止降雨量变化的后倾率的高尔夫球杆头。 在表面2上形成多个细槽。当观察到垂直于表面2的横截面垂直于穿过高尔夫球杆头1的重心中心G的垂直线时，高尔夫球杆头1设置 在预定的放样角度和倾斜角度下，细槽4的横截面中的平均宽度为100μm以下，截面中的平均间距为100μm以下。 因此，可以通过毛细管现象来加速水的排出，从而可以可靠地防止高尔夫球的回转速度在降雨中变化。