GOLF CLUB HEAD

• US 20140187347A1
• Filed: 12/23/2013
• Published: 07/03/2014
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Dunlop Sports Co. Ltd. (Sumitomo Rubber Industries Limited)
• Inventors: YAMAMOTO, Akio
• Granted Patent: US 9,358,431 B2
• Time in Patent Office: Days
• US Class Current: 473/335
• CPC Class Codes: A63B 2053/0491 with added weights, e.g. changeable, replaceable
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: A63B 53/0487 for putters A63B53/065 takes precedence
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/02 Ballast means for adjusting the centre of mass A63B60/24, A63B60/54 take precedence

Abstract

A head body h1 includes a recess part 14 for a socket. A socket 10 is attached to the recess part 14 for a socket. A weight body 12 is detachably attached to the socket 10. The weight body 12 can be secured by relative rotation of an angle +θ°. The weight body 12 can be detached by relative rotation of an angle-θ°. The weight body 12 includes an engaging part 32. The socket 10 includes a first hole part 18 and a second hole part 20. The engaging part 32 can take an engaging position EP and a non-engaging position NP at the second hole part 20 by the relative rotations. A sectional shape of the engaging part 32 has N-fold rotation symmetry. N is an integer of 1 or greater and 3 or less.

Claims

1. A golf club head comprising:

a head body including a recess part for a socket;

a socket attached to the recess part for a socket; and

a weight body detachably attached to the socket,

wherein the weight body can be secured by relative rotation of an angle +θ

°

to the socket;

the secured weight body can be detached by relative rotation of an angle −

θ

°

to the socket;

the weight body includes an engaging part;

the socket includes a first hole part and a second hole part positioned on a deeper side than the first hole part;

the engaging part can take an engaging position EP and a non-engaging position NP at the second hole part by the relative rotations;

rotation of the weight body in the relative rotations is rotation about an axis line Z;

a sectional shape of the engaging part has N-fold rotation symmetry with the axis line Z as a rotation axis; and

N is an integer of 1 or greater and 3 or less.

2. The golf club head according to claim 1, wherein N is 2.

3. The golf club head according to claim 2, wherein the sectional shape of the engaging part is a substantially rectangle.

4. The golf club head according to claim 1, wherein if the longest rotation radius of the engaging part is defined as R1 and the shortest rotation radius of the engaging part is defined as R2, R1/R2 is 1.30 or greater and 1.70 or less.

5. The golf club head according to claim 1, wherein the recess part for a socket includes an undercut part;

the socket includes an engaging projection part; and

the undercut part and the engaging projection part are engaged with each other.

6. The golf club head according to claim 5, wherein the recess part for a socket includes a polygonal inner surface, and the undercut part is provided on the polygonal inner surface.

7. The golf club head according to claim 5, wherein the socket includes a wall-like part;

the wall-like part forms an upper end part of the socket; and

the wall-like part includes the engaging projection part.

8. The golf club head according to claim 7, wherein the wall-like part includes a lack part.

9. The golf club head according to claim 6, wherein if an engaging width between the undercut part and the engaging projection part is defined as W1, and a clearance distance between the wall-like part and the weight body is defined as W2, the clearance distance W2 is less than the engaging width W1.

10. The golf club head according to claim 9, wherein the engaging width W1 is 0.2 mm or greater and 1.0 mm or less.