Golf club head

Abstract

A golf club head comprises a head main body being provided with at least one hole having a helical groove on its inner surface, and a damper having a thread on its outer surface and screwed to the hole of the head main body, the damper being made of elastic material at least partially for absorbing vibration of the head main body.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view of an iron type club head showing the present embodiment;

FIG. 2 is a front elevational view of FIG. 1;

FIG. 3 is a back elevational view of FIG. 2;

FIG. 4 is a cross sectional view along a line A-A in FIG. 3;

FIGS. 5(A) to 5(C) are cross sectional views showing an embodiment of a damper;

FIG. 6 is a cross sectional view along a line A-A in FIG. 3 showing another embodiment;

FIG. 7 is a back elevational view of a club head showing another embodiment in accordance with the present invention;

FIG. 8 is a back elevational view of a club head showing another embodiment in accordance with the present invention;

FIG. 9 is a cross sectional view along a line C-C in FIG. 8;

FIG. 10(A) is a bottom view of a wood type club head showing the other embodiment; and

FIG. 10(B) is a cross sectional view along a line D-D in FIG. 10(A).

Claims

1. A golf club head comprising a head main body being provided with at least one hole having a helical groove on its inner surface, anda damper having a thread on its outer surface and screwed to the hole,the damper being made of elastic material at least partially for absorbing vibration of the head main body.

2. The golf club head according to claim 1, wherein the hole is opened on an outer surface of the head main body, andthe damper is screwed in the hole from outside of the head main body.

3. The golf club head according to claim 1, wherein the head main body comprisesa face portion whose front face defines a club face for hitting a ball and a gap being provided behind the face portion, andthe damper comprises a protruding portion extending from the hole into the gap.

4. The golf club head according to claim 3, wherein an axial length of the protruding portion is in a range of from 1.0 to 30.0 mm.

5. The golf club head according to claim 1, wherein an axial length screwing the damper in the hole of the head main body is in the range of from 2 to 20 mm, anda height of the thread of the damper is from 0.30 to 3.0 mm.

6. The golf club head according to claim 1, wherein the damper comprises a head and a shank being formed with the thread,the shank has an outer diameter smaller than that of the head, andthe hole comprises a socket portion receiving the head of the damper without protruding the head to the outside thereof and a main portion in which the shank of the damper is screwed.

7. The golf club head according to claim 1, wherein the head main body comprisesa face portion whose front face defines a club face for hitting a balla sole portion extending from a lower edge of the club face toward a back face of the club head anda turnup wall turned up at a rear side of the sole portion so as to form a gap behind the face portion, andthe hole is provided in the sole portion or the turnup wall.

8. The golf club head according to claim 7, wherein the damper is screwed in the hole so as to come into contact with a back surface of the face portion through the gap.