JP3352315B2 - Golf club head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a golf club head formed of a metal material.

[0002]

2. Description of the Related Art In a conventional golf club head formed of a metal material, for example, a wood-based head (metal head) formed of stainless steel, the face portion has a wall thickness sufficient to withstand impact with a ball. Since it requires strength, it has to be thicker than the thickness of the crown portion, the sole portion, the side peripheral portion, and the like. Even with a stainless steel metal head, it is necessary to increase the size of the sweet area by expanding the sweet area, increasing the moment of inertia, increasing the depth of the center of gravity, and seeking ease of hitting. Stainless steel metal heads with a head volume exceeding 200 cc have also been developed. In order to increase the size of the head, it is necessary to reduce the thickness to suppress an increase in weight. However, due to the strength of stainless steel, the thickness of the face portion was required to be about 3 mm. Moreover, in order to make the thickness of the entire face portion uniform, the thickness of the portion other than the face portion was made as thin as possible to increase the size of the head.

[0003]

When the thickness of the entire face portion is made substantially uniform to about 3 mm, the weight occupied by the face portion is large, which is disadvantageous in reducing the weight and increasing the size.

Accordingly, the present invention reduces the weight while maintaining the strength of the face portion, and enables the reduced weight to be redistributed in order to increase the size, thereby increasing the size without changing the head weight. It is an object of the present invention to provide a golf club head that can be achieved.

[0005]

To achieve the above object, according to an aspect of this invention, Chi in Taniumu golf club head of wood system formed of an alloy, the center point comprising the sweet spot of the portion forming a face meat Thick thickness
And T _1, of adjacent peripheral locations adjacent to the center point thickness of
Thickness T ₂ and the outer periphery that extends outward from this neighboring area
The relationship between the thickness of the peripheral part and the thickness T ₃ is 3 mm ≧ T ₁ > T
_2> T ₃ is formed on ≧ 2 mm, the thickness of the part forming the face as the distance from the center point in a stepwise manner
Change the thickness so that the face has springiness and maintain the strength of the part forming the face.
The size can be increased without changing the weight .

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0007] In the first embodiment shown in FIG. 1, a titanium coupling
Face portion 2 of golf club head 1 formed of gold
Of to the thickness of the center point 3 comprising a sweet spot withstand impact with the ball is formed to have a thickness T ₁ to maintain a sufficient strength, the wall thickness of the locations other than the center point 3 of the face part 2 than the center point 3 Is also thin. In this embodiment, an adjacent peripheral portion 4 adjacent to the center portion 3 and an outer peripheral peripheral portion 5 extending outward from the adjacent peripheral portion are formed, and the thickness is changed in a stepwise manner as the distance from the center decreases. It is. It indicates the thickness of the adjacent edge points 4 at T _2, showing the thickness of the outer peripheral surrounding points 5 at T _3.

FIG. 2 is a cross-sectional view taken along the line AA of FIG. The area of the center part 3 of the face part 2 is about 3.7 cm ² ,
Area (excluding the area of center 3) is 10.2cm ²
It is about. The thickness T ₁ of the center point 3 is set to 3 mm, wall thickness T ₃ of the wall thickness T ₂ of the adjacent edge points 4 2.5 mm, the outer circumferential periphery point 5 was 2 mm. The total volume of the head 1 is 220c
It was possible to increase the size of c. In addition, by setting the thickness T ₃ of the outer peripheral portion 5 to 2 mm, the thin portion is more easily deformed than the center portion 3 and the adjacent peripheral portion 4, and the spring effect of the entire face portion 2 is reduced. As a result, when the ball collides with the face portion 2, the portion of the outer peripheral portion 5 is bent, and thereafter a spring action to return to the original position is performed, so that the repulsion to the ball is improved.

[0009] Center point 3 may, if there is the thickness to maintain a sufficient strength in the need, do not need to be thicker than necessary. For example, in the above-described embodiment, the adjacent peripheral location 4
If the entire face portion 2 is formed with a thickness equal to or less than the thickness of the peripheral portion 5, there is a concern about the strength,
Is thick enough to withstand the impact of the ball, so that the face portion 2 as a whole can repeatedly withstand the impact of the ball even if the other portions are thinner than the thickness of the center portion 3. When the head 1 is formed of a titanium alloy and the center portion 3 has a thickness of 2.5 mm and can withstand an impact with a ball, the center portion 3 may be slightly thickened to 3 mm. If the strength is not very thin, but has a margin, a good hit feeling can be obtained when the ball is hit at the center 3.

[0010]

As described in the foregoing, according to the present invention, Chi in Taniumu golf club head of wood system formed of an alloy, the thickness T of the wall thickness of the center point, including the sweet spot of the portion forming a face ₁ and Sen
The thickness T ₂ of the wall thickness of the adjacent edge point adjacent to the coater location,
Meat around the outer periphery that extends outward from this adjacent periphery
The relation between the thickness and the thickness T3 is ₃ mm ≧ T ₁ > T ₂ > T ₃ ≧ 2
It formed in mm, as the distance from the center point
Reduce the thickness of the part forming the face in a stepwise manner
Is changed to, to have a spring characteristic to the whole face, and Fe
Change the head weight while maintaining the strength of the part forming the base
Since the size can be increased without increasing the size of the head, the size of the head can be increased while maintaining the strength of the face portion.
In addition, the resilience of the ball is improved by reducing the thickness of the peripheral portion of the face portion so that the entire face has a spring property.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Head 2 Face part 3 Center 4 Adjacent peripheral (peripheral) 5 Peripheral peripheral (peripheral)

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-168613 (JP, A) JP-A-8-308967 (JP, A) JP-A-60-88963 (JP, U) JP-A-4-16863 128771 (JP, U)

Claims (3)

(57) [Claims] (1)HFormed of a titanium alloyWasWood-based
Golf club head(1)Including the sweet spot of the portion (2) forming the face
Center part (3) thicknessThickness T ₁ And the center piece
Thickness T of adjacent peripheral portion (4) adjacent to location (3)
_Two And the outer periphery extending outward from the adjacent peripheral point (4)
Thickness T of peripheral part (5) _Three Relationship with 3mm ≧ T ₁ > T _Two > T _Three ≧ 2mm Formed intoSaid As you move away from the center (3)Fe
So that the thickness of the part (2) that forms the
Change to  Give the entire face spring propertiesAnd form the face
Large without changing the head weight while maintaining the strength of the part (2)
To be able to typeWood-based
Golf club head. 2. The area of the center part (3) is 3.7.
cm ^2, the area of the adjacent edge location (4) 10.2 cm
The wood according to claim 1, wherein the number is about ^2.
System golf club head. 3. The thickness of the center part (3)
3. The method according to claim 1, wherein the distance is 2.5 mm.
Wood-based golf club head.