Golf club head
First Claim
1. A golf club head, comprising:
- a face member made of a metal material;
wherein the face member includes a ball-striking face, and an oval thick portion positioned in a central portion of the ball-striking face;
the oval thick portion has an oval shape viewed in a direction crossing the ball-striking face, the oval shape having recesses formed by recessing both sides of the oval shape in a major axis direction thereof along the face member in an arc-shaped fashion;
the oval thick portion is formed on the face member such that the recesses are directed to a toe-side upper portion and a heel-side lower portion, respectively;
the oval thick portion has a thickness that becomes thickest at a central portion of the oval thick portion and is gradually reduced from the central portion towards a periphery of the oval thick portion;
the face member is formed such that a portion which lies outside the thick portion is thinner than the oval thick portion; and
an occupancy rate of the oval thick portion in the ball-striking face is in a range of 25 to 45%,wherein an occupancy rate of the toe-side upper portion and the heel-side lower portion in a portion of the ball-striking face which excludes the oval thick portion is 60% or more.
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Accused Products
Abstract
A golf club head includes a face member having a ball-striking face and an oval thick portion positioned in a central portion of the ball-striking face. The oval thick portion has an oval shape having recesses formed by recessing both sides in a major axis direction in an arc-shaped fashion. The recesses are directed to a toe-side upper portion and a heel-side lower portion. The thickness of the thick portion becomes thickest at a central portion and is gradually reduced from the central portion towards the periphery. The face member is formed such that a portion outside the thick portion is thinner than the thick portion. An occupancy rate of the oval thick portion in the ball-striking face is in a range of 25 to 45%.
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Citations
17 Claims
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1. A golf club head, comprising:
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a face member made of a metal material; wherein the face member includes a ball-striking face, and an oval thick portion positioned in a central portion of the ball-striking face; the oval thick portion has an oval shape viewed in a direction crossing the ball-striking face, the oval shape having recesses formed by recessing both sides of the oval shape in a major axis direction thereof along the face member in an arc-shaped fashion; the oval thick portion is formed on the face member such that the recesses are directed to a toe-side upper portion and a heel-side lower portion, respectively; the oval thick portion has a thickness that becomes thickest at a central portion of the oval thick portion and is gradually reduced from the central portion towards a periphery of the oval thick portion; the face member is formed such that a portion which lies outside the thick portion is thinner than the oval thick portion; and an occupancy rate of the oval thick portion in the ball-striking face is in a range of 25 to 45%, wherein an occupancy rate of the toe-side upper portion and the heel-side lower portion in a portion of the ball-striking face which excludes the oval thick portion is 60% or more. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A golf club head, comprising:
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a face member made of a metal material; wherein the face member includes a ball-striking face, and an oval thick portion positioned in a central portion of the ball-striking face; the oval thick portion has an oval shape viewed in a direction crossing the ball-striking face, the oval shape having recesses formed by recessing both sides in a major axis direction in an arc-shaped fashion; the oval thick portion is formed on the face member such that the recesses are directed to a toe-side upper portion and a heel-side lower portion, respectively; the oval thick portion has a thickness that becomes thickest at a central portion of the oval thick portion and is gradually reduced from the central portion towards a periphery of the oval thick portion; the face member is formed such that a portion which lies outside the thick portion is thinner than the oval thick portion; and an occupancy rate of the oval thick portion in the ball-striking face is in a range of 25 to 45%, wherein the recesses in the oval thick portion viewed in the direction crossing the ball-striking face are concave relative to a location outside of the oval thick portion. - View Dependent Claims (8, 9, 10, 11)
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12. A golf club head, comprising:
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a face member made of a metal material; wherein the face member includes a ball-striking face, and an oval thick portion positioned in a central portion of the ball-striking face; the oval thick portion has an oval shape viewed in a direction crossing the ball-striking face, the oval shape having recesses formed by recessing both sides in a major axis direction in an arc-shaped fashion; the oval thick portion is formed on the face member such that the recesses are directed to a toe-side upper portion and a heel-side lower portion, respectively; the oval thick portion has a thickness that becomes thickest at a central portion of the oval thick portion and is gradually reduced from the central portion towards a periphery of the oval thick portion; the face member is formed such that a portion which lies outside the thick portion is thinner than the oval thick portion; and an occupancy rate of the oval thick portion in the ball-striking face is in a range of 25 to 45%, wherein a radius of curvature of the recesses is from 12 mm to 25 mm; and
a radius of curvature of arcs of crown and sole sides of the oval thick portion is from 35 mm to 60 mm. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification