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Golf club head

a golf club and head technology, applied in the field of golf club head, can solve the problems of poor resonance and high likelihood of low loudness of impact sound, and achieve the effect of louder impact sound and high pitch

Inactive Publication Date: 2012-12-20
BRIDGESTONE SPORTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]An objective of the present invention is to provide a golf club head which generates a higher-pitched, louder impact sound even when its head volume increases.

Problems solved by technology

However, as the degree of constraint of the sole portion increases, an impact sound is more likely to have low loudness and poor resonance.

Method used

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Examples

Experimental program
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example

[0040]Models of a plurality of golf club heads were designed on a computer, and vibration analysis was performed for each model on the computer. All these models are driver heads with the same shape and the same volume of 460 cc, and are different only in the specifications of a rib 20 and a weight portion 21. Note that these golf club heads are made of a titanium alloy (Ti-6Al-4V).

[0041]Each model has the same arrangement as the golf club head 10 shown in FIGS. 1, 2A, and 2B, and includes a rib 20, a weight portion 21, and a sole / side portion 13 which includes a thick region S1 on the side of a face portion 11, a thin region S2, and a thick region S3 on the back side in turn from the side of the face portion 11 to the back side. The thin region S2 has a dimension of 65 mm in the face-to-back direction, and a thickness of 0.6 mm. A distance LW of the weight portion 21 from an intersection point PF is 50 mm, and a distance LR of the rib 20 from the intersection point PF is 35 mm.

[004...

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PUM

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Abstract

A hollow golf club head according to this invention includes a face portion, a crown portion, and a sole / side portion which includes a sole portion and a side portion. This golf club head includes a rib which extends from the toe side to the heel side in the sole portion, and a weight portion which is provided in the sole portion on the back side with respect to the rib, and increases the amplitude of vibration of the sole portion. The natural frequency of the first-order vibration mode of the sole portion is 2,500 Hz or more. A mass m (g) of the weight portion satisfies 1≦m<6. The rib has a quadrangular cross-sectional shape with a width b (mm) and a height h (mm), and 0.20≦b·h3 / m4<8.00.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a golf club head and, more particularly, to a technique for improving an impact sound.[0003]2. Description of the Related Art[0004]In hollow golf club heads typified by a driver head, techniques for improving an impact sound by appropriately designing the hollow body construction have been proposed. For example, Japanese Patent Laid-Open Nos. 11-155982 and 2003-275345 disclose techniques for improving an impact sound by partially varying the thickness of a sole portion. Also, Japanese Patent Laid-Open Nos. 2002-186691 and 2003-102877 disclose techniques for improving an impact sound by providing a rib in a sole portion.[0005]The volume of a hollow golf club head is increasing every year, so its crown portion and sole portion are getting thinner, and their areas are increasing along with this trend. Therefore, a low-pitched impact sound is more likely to be generated at the time of striki...

Claims

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Application Information

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IPC IPC(8): A63B53/04A63B102/32
CPCA63B53/04A63B53/06A63B53/0466A63B60/00A63B2053/0412A63B2053/0408A63B2053/045A63B2053/0433A63B53/0412A63B53/045A63B53/0408A63B53/0433A63B60/002
Inventor WADA, KOZUEBAN, WATARU
Owner BRIDGESTONE SPORTS