Golf club head

a golf club and head technology, applied in the field of golf club head, can solve the problems of inability to anticipate the spring effect and the tendency to increase the weight of the head, and achieve the effects of small thickness, small weight of the face portion, and small thickness

Inactive Publication Date: 2011-12-29
BRIDGESTONE SPORTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]In view of the above-described problems, an object of the present invention is to provide a golf club head maintaining a low weight of the face member and suppressing dispersion of CT values of the face member so that the CT values at hitting points other than a sweet spot are substantially equal to the CT value at the sweet spot.
[0017]The golf club head of the present invention has a face portion formed of metallic material, and the face portion includes a thick-walled portion located in the center of the face portion and an outer peripheral portion located on an outer periphery of the thick-walled portion. The thick-walled portion has a shape depressed substantially circularly toward the center of the face portion on two sides opposing each other of a substantially circular shape or a substantially elliptical shape. The thick-walled portion includes a central portion of the face portion having a largest thickness, a first ridge which surrounds the central portion and has a smaller thickness than the central portion, and a first valley which is located between the central portion and the first ridge and has a smaller thickness than the first ridge. Consequently, a low weight of the face portion is maintained and dispersion of the CT values at each hitting point is suppressed, so that the CT values at hitting points other than a sweet spot are substantially equal to the CT value at the sweet spot. Thus, even if a ball is hit at a position off the sweet spot, the carry can be increased.

Problems solved by technology

However, even if a highly resilient head is used, when a ball is hit by a face portion other than the sweet area, that is, at the time of off-center hitting, a spring effect cannot be anticipated, and the carry tends to decrease extremely.
Furthermore, there is another problem in that a value indicating the resilience performance of a ball, called the CT value (Contact Time Value), may vary depending on a hitting point of the ball.

Method used

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Examples

Experimental program
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examples

[0056]A CT value (Contact Time Value) of a face member of the present invention was calculated through a simulation using a computer (Example 1). The face member was constructed in the structure shown in FIG. 3 and FIG. 4. As a design condition of the face member, the thickness T1 of the central portion 17 was set to 3.7 mm, the thickness T2 of the first ridge 18 was set to 3.5 mm, the thickness T3 of the first valley 19 was set to 3.0 mm and the thickness T4 of the outer peripheral portion 12 was set to 2.4 mm. The height H1 of the face member 10 was set to 50 mm, the length H2 from the upper side to the lower side of the first ridge 18 was set to 30 mm, the height H3 from the upper side to the lower side of the first valley 19 was set to 20 mm and the length H4 from the upper side to the lower side of the central portion 17 was set to 14 mm. Furthermore, the length of the long axis of the ellipse was set to 64 mm, the length of the short axis was set to 40 mm and an angle θ of the...

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PUM

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Abstract

A golf club head has a face portion with a thick-walled portion located in the center of the face portion and an outer peripheral portion located on an outer periphery of the thick-walled portion. The thick-walled portion has a central portion of the face portion having a largest thickness, a first ridge which surrounds the central portion and has a smaller thickness than the central portion, and a first valley which is located between the central portion and the first ridge and has a smaller thickness than the first ridge. The golf club head maintains a low weight of a face portion and suppresses dispersion of CT values at each hitting point so that the CT values at hitting points other than a sweet spot are substantially equal to the CT value at the sweet spot.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a golf club head, and more particularly, relates to a golf club head having a thick-walled portion of which the thickness varies depending on positions thereof, provided on the back surface of a face member.[0003]2. Description of Related Art[0004]Most recent wood club heads are configured so that at least a face portion is formed of a metallic material. The wall thickness of the face portion must be increased so as to maintain a strength capable of withstanding a shock of impact by a ball. The increase in head size continues, but on the other hand, the rules specify that the volume of a club head must be less than 460 cm3 plus an allowable error of 10 cm3. Therefore, the head volumes of most drivers are very close to the upper 460 cm3 limit. When the head size is increased, the sweet area expands, the peripheral weight distribution is emphasized, and the transverse and vertical moment o...

Claims

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Application Information

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IPC IPC(8): A63B53/04A63B102/32
CPCA63B53/0466A63B2053/0408A63B2053/0462A63B2053/0458A63B53/0458A63B53/0462A63B53/0408
InventorWADA, KOZUEMATSUNAGA, HIDEO
OwnerBRIDGESTONE SPORTS