JP2016026557A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head which is favorable in hitting feeling while extending a flying distance.SOLUTION: There is provided a golf club head having a cup face 1. The cup face includes a face part 11 for hitting a ball, and an erecting part 12 extending from a circumference of the face part toward a back face side of the face part. The circumference of the face part includes a top-side top line extending between a toe-side terminal point at a most-toe side on the circumference of the face part and a heel-side terminal point at a most-heel side, and a sole line at a sole side extending between the toe-side terminal point and the heel-side terminal point. The face part has a center region and a peripheral region. The center region includes a face center, extends from the sole line up to the top line so as to be inclined from the sole side toward the top side along a direction from the heel side toward the toe side, and does not reach the toe-side terminal point. The peripheral region is thinner in thickness than the center region, and surrounds the toe side and the heel side in the center region.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a golf club head having a cup face.

  Conventionally, a golf club head having a cup face is known (see Patent Document 1). Conventionally, various designs have been made on the design of the thickness of the face of the golf club head from the viewpoint of strength, the viewpoint of extending the flight distance, and the like.

Special table 2010-530783

  By the way, according to the study of the present inventor, if the area with a thin wall and a high coefficient of restitution (hereinafter referred to as “high repulsion area”) is widened, there is a risk that the hit feeling of the golf club is impaired. That is, when a ball is captured in a thin, high repulsion area, the hit feeling is lightened, and particularly advanced users dislike such a light hit feeling. However, if you try to improve the hit feeling by making it thick, you will face the problem that the high repulsion area becomes narrow and the flight distance does not increase.

  An object of the present invention is to provide a golf club head having a good hit feeling while extending a flight distance.

  A golf club head according to a first aspect of the present invention is a golf club head including a cup face. The cup face includes a face portion for hitting a ball, and a rising portion extending from the periphery of the face portion to the back side of the face portion. The peripheral edge of the face portion includes a top side top line extending between the toe side end point and the heel side end point, and a sole side sole line extending between the toe side end point and the heel side end point. The toe side end point is the point on the most toe side on the periphery of the face portion, and the heel side end point is the point on the most heel side on the periphery of the face portion. The face portion has a central region and a peripheral region. The central region includes a face center and extends from the sole line to the top line so as to incline from the sole side to the top side along a direction from the heel side to the toe side. Not reached. The peripheral region is thinner than the central region and surrounds the toe side and the heel side of the central region.

  A golf club head according to a second aspect of the present invention is the golf club head according to the first aspect, wherein the central region includes a thick part including the face center, the thick part, and the peripheral region. And a transition portion located therebetween. The transition portion is thinner than the thick portion and thicker than the peripheral region.

  A golf club head according to a third aspect of the present invention is the golf club head according to the second aspect, wherein the transition portion gradually decreases in thickness from the thick portion toward the peripheral region. .

  A golf club head according to a fourth aspect of the present invention is the golf club head according to the second aspect or the third aspect, wherein the transition portion surrounds the entire circumference of the thick portion.

  A golf club head according to a fifth aspect of the present invention is the golf club head according to any one of the second to fourth aspects, wherein the transition portion is continuous with the top line and the sole line.

  A golf club head according to a sixth aspect of the present invention is the golf club head according to any one of the first to fifth aspects, wherein the central region is I-shaped.

  A golf club head according to a seventh aspect of the present invention is the golf club head according to the sixth aspect, wherein the central region is I-shaped having a bulge on at least one of the toe side and the heel side.

  A golf club head according to an eighth aspect of the present invention is the golf club head according to any one of the second to fifth aspects, wherein the thick portion is I-shaped.

  A golf club head according to a ninth aspect of the present invention is the golf club head according to the eighth aspect, wherein the thick portion has an I shape having a bulge on at least one of the toe side and the heel side.

  A golf club head according to a tenth aspect of the present invention is the golf club head according to any one of the first to ninth aspects, wherein the central region passes through the geometric center of the central region or the thick portion, and the central region 5 ° ≦ θ1 <90 °, where θ1 is the angle between the line segment that overlaps with the line segment having the maximum length and the toe-heel direction.

  A golf club head according to an eleventh aspect of the present invention is the golf club head according to the tenth aspect, wherein the golf club head is a line segment that passes through the geometric center of the central region or the thick portion and overlaps the central region. When the angle between the line segment having the maximum length and the toe-heel direction is θ1, 30 ° ≦ θ1 ≦ 50 °.

  In general, on the face surface, hit points are distributed along a straight line that passes through the face center and inclines from the sole side to the top side along the direction from the heel side to the toe side. More specifically, the region in which the hit points are distributed extends relatively over the entire face surface in the top-sole direction, and is relatively concentrated in the central portion of the face surface in the toe-heel direction.

  In the golf club head according to the first aspect, the region (central region) along such a hit point distribution is designed to be thicker than the peripheral region. Therefore, the hit feeling is prevented from being lowered. Further, since the cup face structure is adopted, a sufficient flight distance can be maintained.

It is a perspective view in the standard state of the golf club head concerning this embodiment. It is a top view in the standard state of a golf club head. It is the sectional view on the AA line of FIG. The rear view of the cup face in a reference state. The rear view of the cup face in the reference state concerning a modification. The rear view of the cup face in the reference state concerning another modification. The rear view of the cup face in the reference | standard state which concerns on another modification. The rear view of the cup face in the reference | standard state which concerns on another modification.

  Hereinafter, a golf club head according to an embodiment of the present invention will be described with reference to the drawings.

<1. Overview of golf club head>
FIG. 1 is a perspective view of a golf club head (hereinafter, simply referred to as “head”) 100 according to the present embodiment in a reference state, and FIG. 2 is a plan view of the head 100 in a reference state. . The reference state of the golf club head will be described later. The head 100 has a hollow structure, and a wall surface is formed by the cup face 1, the crown portion 2, the sole portion 3, the side portion 4, and the hosel portion 5.

  The cup face 1 constitutes a front portion of the head 100 which is a surface for hitting a ball. The crown portion 2 is adjacent to the cup face 1 and constitutes the upper surface of the head 100. The sole portion 3 constitutes the bottom surface of the head 100 and is adjacent to the cup face 1 and the side portion 4. The side part 4 is a part between the crown part 2 and the sole part 3 and extends from the toe side of the cup face 1 to the heel side of the cup face 1 through the back side of the head 100. Further, the hosel portion 5 is a portion provided adjacent to the heel side of the crown portion 2 and has an insertion hole 51 into which a golf club shaft (not shown) is inserted. The central axis Z of the insertion hole 51 coincides with the axis of the shaft. The head 100 described here is a wood type such as a driver (# 1) or a fairway wood, but the type is not limited and may be a so-called utility type or hybrid type.

  Here, the reference state described above will be described. As shown in FIGS. 1 and 2, the central axis Z is included in a plane P (hereinafter referred to as a reference vertical plane P) perpendicular to the horizontal plane H (see FIG. 3), and has a predetermined lie angle and real loft angle. The state where the head is placed on the horizontal plane H is defined as the reference state. Further, as shown in FIG. 2, the direction of the line of intersection between the reference vertical plane P and the horizontal plane H is referred to as the toe-heel direction, and the direction is perpendicular to the toe-heel direction and parallel to the horizontal plane H. Is referred to as the face-back direction. A direction perpendicular to the horizontal plane H is referred to as a sole-top direction.

  The head 100 can be formed of, for example, a titanium alloy (for example, Ti-6Al-4V) having a specific gravity of about 4.4 to 5.0. In addition to the titanium alloy, it can be formed using one or more of stainless steel, maraging steel, aluminum alloy, magnesium alloy, amorphous alloy, and the like. Moreover, not only a metal material but a fiber reinforced plastic etc. can also form.

  Incidentally, the head 100 according to the present embodiment is configured by assembling the head body 6 having the crown portion 2, the sole portion 3, the side portion 4, and the hosel portion 5, and the cup face 1. The head body 6 and the cup face 1 are joined by, for example, welding (plasma welding, laser welding, brazing, etc.). The head main body 6 has an opening surrounded by the crown part 2, the sole part 3, and the side part 4, and the cup face 1 is attached so as to close the opening. The head body 6 can be assembled from a plurality of parts, or can be integrally formed. Such a head body 6 and the cup face 1 can be manufactured by various methods. For example, the head body 6 can be manufactured by casting such as a known lost wax precision casting method. The cup face 1 can be manufactured by, for example, a forging method or flat plate pressing. Hereinafter, the structure of the cup face 1 will be described in detail.

<2. Cup face structure>
Hereinafter, the cup face 1 will be described with reference to FIGS. FIG. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is a view of the cup face 1 in the reference state as viewed from the back side. As shown in FIG. 3, the cup face 1 is formed in a cup shape having a flat face portion 11 for hitting a ball and a rising portion 12 extending from the periphery of the face portion 11 to the back side of the face portion 11. Yes.

  As described above, the cup face 1 having the rising portion 12 has a larger area of the area to be bent by the rising portion 12 than the face having no rising portion. Therefore, the cup face 1 is easily bent and has a high coefficient of restitution. Yes. That is, such a cup face 1 contributes to an increase in flight distance.

  A front surface (hereinafter referred to as a “face surface”) side that is a ball striking surface in the face portion 11 is formed flat. On the other hand, irregularities are formed on the back side of the face portion 11. That is, the face portion 11 is composed of a plurality of regions having different thicknesses. More specifically, a thick central region 20 is formed in the face portion 11, and thin peripheral regions 30 a and 30 b are formed so as to surround the central region 20. A peripheral region 30 a is adjacent to the heel side of the central region 20. A peripheral region 30 b is adjacent to the toe side of the central region 20. The central region 20 surrounds the thickest thick portion 21 located on the inner side and the thick portion 21, and is thicker than the peripheral regions 30 a and 30 b, but thinner than the thick portion 21. Transition portion 22. In this embodiment, the transition part 22 is comprised so that thickness may become thin gradually as it goes to the peripheral region 30a, 30b from the thick part 21, and the change of the said thickness is continuous. However, the thickness of the transition part 22 may be constant, or may change discontinuously in a stepped manner even if it changes.

  In the present embodiment, the thickness w1 of the thick portion 21 is substantially constant, for example, 2.0 mm ≦ w1 ≦ 4.5 mm, more preferably 3.0 mm ≦ w1 ≦ 4.0 mm. be able to. In the present embodiment, the thickness w2 of the peripheral regions 30a and 30b is also substantially constant, for example, 1.5 mm ≦ w2 ≦ 3.0 mm, more preferably 1.8 mm ≦ w2 ≦ 2. It can be 6 mm. Accordingly, the central region 20, particularly the thick portion 21, is a low repulsion area having a relatively low restitution coefficient, and the peripheral regions 30a and 30b are high repulsion areas having a relatively high restitution coefficient.

  Hereinafter, for convenience of explanation, when the head 100 is arranged in the reference state, the point P1 closest to the toe side on the periphery of the face portion 11 is referred to as a toe side end point, and the point P2 closest to the heel side is referred to as a heel side end point ( (See FIG. 4). On the periphery of the face portion 11, the top line extending between the toe side end point P1 and the heel side end point P2 is referred to as a top line L1, and the sole extending between the toe side end point P1 and the heel side end point P2 is referred to as a top line L1. The side line is referred to as a sole line L2.

  As shown in FIG. 4, the thick portion 21 includes a face center Pc and a sweet spot located in the vicinity thereof, is generally oval in shape, and is top from the sole side along the direction from the heel side to the toe side. It extends in an I shape so as to incline to the side. Note that the sweet spot is a perpendicular foot drawn from the center of gravity of the golf club head 100 to the face portion 11. Further, the thick portion 21 is relatively spread over the entire face portion 11 in the top-sole direction, but is relatively concentrated in the central portion of the face portion 11 in the toe-heel direction, and the toe side end point P1. Not reached. In the present embodiment, the face center Pc is specified as follows. That is, first, the maximum width Wx in the toe-heel direction is determined on the face surface, and the center position Px in the toe-heel direction in the maximum width Wx is determined. At this position Px, the center point Py in the vertical direction of the face surface is determined, and this point Py is defined as the face center Pc.

  On the other hand, the transition portion 22 surrounds the entire periphery of the thick portion 21 and has a substantially uniform width along the circumferential direction except for the portion surrounding the top portion of the thick portion 21 and the vicinity of the end portion on the sole side. . In the present embodiment, the portion of the transition portion 22 that surrounds the vicinity of the end portion on the top side and the sole side of the thick portion 21 is narrower than the portion that surrounds the toe side and the heel side of the thick portion 21. is there. As a result, the central region 20 composed of the thick portion 21 and the transition portion 22 is also generally elliptical as a whole, and is inclined from the sole side to the top side along the direction from the heel side to the toe side. It extends in an I shape. Moreover, the transition part 22 has reached the top line L1 and the sole line L2. That is, the I-shaped central region 20 intersects the top line L1 and the sole line L2 at one place. The central region 20 extends over the entire face portion 11 in the top-sole direction, but is relatively concentrated in the central portion of the face portion 11 in the toe-heel direction, and does not reach the toe side end point P1.

  By the way, when the thickness of the face part 11 is drastically reduced in the vicinity of the boundary line between the face part 11 and the rising part 12, there is a possibility that stress is concentrated on the thin part and the durability of the face part 11 is affected. However, in the present embodiment, as described above, the transition portion 22 is continuous with the top line L1 and the sole line L2. That is, the thick portion 21 suddenly ends in the vicinity of the rising portion 12, and the thickness of the face portion 11 does not suddenly decrease. Therefore, the strength of the cup face 1 is ensured.

  Further, if a line segment that passes through the center Pw (geometric center) of the thick portion 21 and overlaps the central region 20 and has the maximum length is L3, the line segment L3 and the toe-heel direction For example, the angle θ1 can be 5 ° ≦ θ1 <90 °, and more preferably 30 ° ≦ θ1 ≦ 50 °. In the present embodiment, for ease of explanation, the center Pw of the thick portion 21 coincides with the center (geometric center) of the central region 20 and coincides with the face center Pc. It will be explained as a thing. However, even if they match, it does not indicate only perfect match. For example, the center Pw of the thick portion 21 and the face center Pc match with a short range deviation of about 5 mm at most. There is also.

  If the intersections of the line segment L3 and the outline of the thick portion 21 are P3 and P4 (point P3 is on the top side and point P4 is on the sole side), the length t1 of the line segment L3 and the point P3 , P4 and the length t2 can be, for example, 0.2 ≦ t2 / t1 ≦ 1, more preferably 0.5 ≦ t2 / t1 ≦ 0.95. A straight line passing through the center Pw of the thick part 21 and extending in the toe-heel direction is L4, and intersections of the straight line L4 and the outline of the thick part 21 are P5 and P6 (point P5 is on the toe side). If the point P6 is the heel side), the distance t3 between the points Pw and P5 can be, for example, 5 mm ≦ t3 ≦ 20 mm, and more preferably 7 mm ≦ t3 ≦ 15 mm. The same applies to the distance t4 between the points Pw and P6, and t3 and t4 are substantially equal. If the intersections of the straight line L4 and the outer contour line of the transition portion 22 are P7 and P8 (point P7 is on the toe side and point P8 is on the heel side), the distance t5 between the points Pw and P7 is For example, 15 mm ≦ t5 ≦ 35 mm, more preferably 20 mm ≦ t5 ≦ 25 mm. The same applies to the distance t6 between the points Pw and P8, and t5 and t6 are substantially equal.

  By the way, generally, on the face surface, hit points are distributed along a straight line that passes through the face center and inclines from the sole side to the top side along the direction from the heel side to the toe side. More specifically, the region in which the hit points are distributed extends relatively over the entire face surface in the top-sole direction, and is relatively concentrated in the central portion of the face surface in the toe-heel direction. Therefore, it can be said that the thick central region 20, particularly the thick portion 21, spreads along the hit point distribution in the face portion 11. As a result, the cup face 1 can provide a heavy and comfortable hit feeling, and such hit feeling is particularly preferred by golfers.

<3. Features>
In the golf club head 100, the region (central region 20, particularly the thick portion 21) along the hit point distribution is designed to be thicker than the peripheral regions 30a and 30b. Therefore, it is possible to obtain a heavy and comfortable hit feeling particularly preferred by golf experts. In addition, since the golf club head 100 employs a cup face structure, a sufficient flight distance can be maintained.

<4. Modification>
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible unless it deviates from the meaning. For example, the following changes can be made. Moreover, the gist of the following modifications can be combined as appropriate.

<4-1>
In the above embodiment, the transition part 22 is provided around the thick part 21, but the transition part 22 may be omitted, and the thin peripheral areas 30 a and 30 b may be provided directly around the thick part 21. However, in this case, from the viewpoint of securing the strength of the cup face 1, it is preferable to extend the thick portion 21 to the top line L1 and the sole line L2. Moreover, you may extend the thick part 21 to at least one of the top line L1 and the sole line L2, leaving the transition part 22 adjacent to the toe side and heel side of the thick part 21.

<4-2>
The shape of the thick part 21 and the transition part 22 is not restricted to what was mentioned above, It can change suitably. For example, as shown in FIG. 4, the thick portion 21 (central region 20) of the above embodiment has not changed much along the line segment L <b> 3, but the shape of the thick portion 21 (central region 20) As shown in FIG. 5, an I shape may be used in which the vicinity of the center becomes wider along the line segment L <b> 3 and becomes narrower as it approaches the top side and the sole side. In the example of FIG. 5, compared with the example of FIG. 4, the thick portion 21 (central region 20) is expanded outward on both the toe side and the heel side in the vicinity of the center Pw. In addition, as shown in FIG. 6, the thick portion 21 (the central region 20) has an I-shape that has a bulge on at least one of the toe side and the heel side at the center. If it has, it can also be said to be φ-shaped). Further, as shown in FIG. 7, at least one of the bulges on the toe side and the heel side can be formed at a position shifted from the center. In this case, not only during a normal shot in which the ball is captured at the face center Pc, but also in a shot in which the ball is captured with the face center Pc removed in order to change the ball muscles, the ball is moved by the thick portion 21 or the transition portion 22. The ball can be hit and the hit feeling can be kept good.

  In the above embodiment, the center (the center of the central region 20) Pw of the thick portion 21 and the face center Pc coincide with each other, but the center Pw is shifted to the toe side from the face center Pc. In this case, that is, when the thick portion 21 (central region 20) is shifted to the toe side, the thick portion 21 (central region 20) can be shaped as shown in FIG. That is, in the example of FIG. 8, compared with the example of FIG. 4, the thick portion 21 (central region 20) is expanded outward only on the heel side in the vicinity of the center Pw. On the contrary, when the center Pw is shifted to the heel side from the face center Pc, that is, when the thick portion 21 (central region 20) is shifted to the heel side, the thick portion 21 (central region). 20) may be enlarged outward only on the toe side in the vicinity of the center Pw.

DESCRIPTION OF SYMBOLS 1 Cup face 11 Face part 12 Rising part 20 Center area 21 Thick part 22 Transition part 30a, 30b Peripheral area 100 Golf club head L1 Top line L2 Sole line P1 Toe side end point P2 Heel side end point Pc Face center

Claims (11)

A golf club head comprising a cup face,
The cup face is
A face part for hitting the ball,
A rising portion extending from the periphery of the face portion to the back side of the face portion,
The peripheral edge of the face portion includes a top side top line extending between a toe side end point that is the most toe side point and a heel side end point that is the most heel side point, the toe side end point, and the heel side end point. Including a sole side sole line extending between
The face portion is
A central region that includes a face center and extends from the sole line to the top line so as to incline from the sole side to the top side along a direction from the heel side to the toe side, and does not reach the toe side end point When,
It is thinner than the central region, and has a peripheral region surrounding the toe side and the heel side of the central region,
Golf club head. The central region is
A thick part including the face center;
Located between the thick portion and the peripheral region, and having a transition portion that is thinner than the thick portion and thicker than the peripheral region,
The golf club head according to claim 1. The transition portion gradually decreases in thickness as it goes from the thick portion to the peripheral region.
The golf club head according to claim 2. The transition part surrounds the entire circumference of the thick part,
The golf club head according to claim 2 or 3. The transition portion is continuous with the top line and the sole line,
The golf club head according to claim 2. The central region is I-shaped,
The golf club head according to claim 1. The central region is I-shaped having a bulge on at least one of the toe side and the heel side.
The golf club head according to claim 6. The thick part is I-shaped,
The golf club head according to claim 2. The thick part is I-shaped having a bulge on at least one of the toe side and the heel side.
The golf club head according to claim 8. When the angle between the line segment that passes through the geometric center of the central region or the thick part and overlaps the central region and has the maximum length and the toe-heel direction is θ1, 5 ° ≦ θ1 <90 °,
The golf club head according to claim 1. When the angle between the line segment that passes through the geometric center of the central region or the thick part and overlaps the central region and has the maximum length and the toe-heel direction is θ1, 30 ° ≦ θ1 ≦ 50 °,
The golf club head according to claim 10.

Images