JP2011234749A - Golf club head - Google Patents

Golf club head Download PDF

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JP2011234749A
JP2011234749A JP2010105955A JP2010105955A JP2011234749A JP 2011234749 A JP2011234749 A JP 2011234749A JP 2010105955 A JP2010105955 A JP 2010105955A JP 2010105955 A JP2010105955 A JP 2010105955A JP 2011234749 A JP2011234749 A JP 2011234749A
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narrow
golf club
narrow groove
club head
grooves
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JP5485780B2 (en
JP2011234749A5 (en
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Ko Saka
航 坂
Masaomi Hiruta
正臣 蛭田
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Bridgestone Sports Co Ltd
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Bridgestone Sports Co Ltd
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Priority to US13/050,392 priority patent/US20110269567A1/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/047—Heads iron-type
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0445—Details of grooves or the like on the impact surface
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0466—Heads wood-type

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve an effect of suppressing a decrease in back spin amount by grooves finer than scorelines.SOLUTION: This invention provides a golf club head in which a plurality of scorelines are formed in its face surface. The golf club head includes a first fine groove formed in the face surface to extend parallel to the scorelines, and a second fine groove formed in the face surface to intersect with the first fine groove.

Description

本発明はゴルフクラブヘッドに関するものである。   The present invention relates to a golf club head.

一般に、ゴルフクラブヘッドのフェース面にはトウ−ヒール方向に互いに平行な複数の直線状の溝が形成されている。この溝はスコアライン、マーキングライン、フェースライン等と呼ばれている（本書においてはスコアラインと称する。）。このスコアラインは、打球のバックスピン量を増大させたり、或いは、雨天時やラフからのショットの場合に、打球のバックスピン量が著しく低減することを抑制する効果がある。   Generally, a plurality of linear grooves parallel to each other in the toe-heel direction are formed on the face surface of a golf club head. This groove is called a score line, a marking line, a face line, etc. (referred to as a score line in this document). This score line has an effect of increasing the backspin amount of the hit ball or suppressing the backspin amount of the hit ball from being remarkably reduced in the case of a rainy day or a shot from the rough.

しかし、スコアラインのみではバックスピン量の増大効果や雨天時等におけるバックスピン量の低減抑制効果に限界がある。そこで、スコアラインよりも細かい溝をフェース面に形成することが（例えば、特許文献１に記載）、打球のバックスピン量の低減の防止に有効である。   However, the score line alone has a limit to the effect of increasing the backspin amount and the effect of suppressing the reduction of the backspin amount during rainy weather. Therefore, forming a groove finer than the score line on the face surface (for example, described in Patent Document 1) is effective in preventing reduction of the backspin amount of the hit ball.

特開２００７−２０２６３３号公報JP 2007-202633 A

しかし、スコアラインよりも細かい溝は、スコアラインと比べて細かいことから直ぐに水滴で満たされてしまう。このため、雨天時やラフからのショットの場合に、バックスピン量の低減抑制効果が十分に発揮されない場合がある。   However, the grooves that are finer than the score line are filled with water droplets immediately because they are finer than the score line. For this reason, in the case of a rainy day or a shot from the rough, the effect of suppressing the reduction of the backspin amount may not be sufficiently exhibited.

本発明の目的は、スコアラインよりも細かい溝による、バックスピン量の低減抑制効果を向上することにある。   An object of the present invention is to improve the effect of suppressing the reduction of the backspin amount due to the grooves smaller than the score line.

本発明によれば、フェース面に複数本のスコアラインが形成されたゴルフクラブヘッドにおいて、前記フェース面に形成され、前記スコアラインと平行な第１細溝と、前記フェース面に形成され、前記第１細溝と交差する第２細溝と、を備えたことを特徴とするゴルフクラブヘッドが提供される。   According to the present invention, in the golf club head in which a plurality of score lines are formed on the face surface, the first narrow groove formed on the face surface, parallel to the score line, and formed on the face surface, A golf club head comprising a second narrow groove intersecting with the first narrow groove is provided.

本発明によれば、スコアラインよりも細かい溝による、バックスピン量の低減抑制効果を向上することができる。   According to the present invention, it is possible to improve the effect of suppressing the reduction of the backspin amount due to the grooves smaller than the score line.

本発明の一実施形態に係るゴルフクラブヘッド１の外観図及びフェース面１０の部分拡大図。1 is an external view of a golf club head 1 according to an embodiment of the present invention and a partially enlarged view of a face surface 10. フェース面１０の部分断面斜視図。FIG. 3 is a partial cross-sectional perspective view of the face surface 10. （Ａ）はスコアライン２０の、その長手方向（トウ−ヒール方向）に直交する方向の断面図、（Ｂ）は細溝３０の、その長手方向に直交する方向の断面図、（Ｃ）は細溝３０の他の例の、その長手方向に直交する方向の断面図。(A) is a sectional view of the score line 20 in a direction perpendicular to the longitudinal direction (toe-heel direction), (B) is a sectional view of the narrow groove 30 in a direction perpendicular to the longitudinal direction, and (C) is Sectional drawing of the direction orthogonal to the longitudinal direction of the other example of the narrow groove 30. FIG. 細溝３０乃至３２を形成する前の一次成形品１'を示す断面図。Sectional drawing which shows primary molded product 1 'before forming the thin grooves 30 thru | or 32. FIG. ＮＣフライス盤による細溝３０の形成方法の説明図。Explanatory drawing of the formation method of the narrow groove 30 by NC milling machine. 細溝３１の他の例を示すフェース面１０の部分断面斜視図。FIG. 10 is a partial cross-sectional perspective view of the face surface 10 showing another example of the narrow groove 31.

＜第１実施形態＞
図１は本発明の一実施形態に係るゴルフクラブヘッド１の外観図及びフェース面１０の部分拡大図である。同図の例はアイアン型のゴルフクラブヘッドに本発明を適用した例を示す。本発明は、アイアン型のゴルフクラブヘッド、特に、ミドルアイアン、ショートアイアン、ウェッジ型のゴルフクラブヘッドに好適であり、具体的には、ロフト角が３０度以上７０度以下、ヘッド重量が２４０ｇ以上３２０ｇ以下のゴルフクラブヘッドに好適である。しかし、本発明はウッド型やユーティリティー型（ハイブリッド型）のゴルフクラブヘッドにも適用できる。 <First Embodiment>
FIG. 1 is an external view of a golf club head 1 according to an embodiment of the present invention and a partially enlarged view of a face surface 10. The example in the figure shows an example in which the present invention is applied to an iron type golf club head. The present invention is suitable for an iron type golf club head, particularly a middle iron, a short iron, and a wedge type golf club head. Specifically, the loft angle is 30 degrees or more and 70 degrees or less, and the head weight is 240 g or more. Suitable for golf club heads of 320 g or less. However, the present invention can also be applied to wood type or utility type (hybrid type) golf club heads.

ゴルフクラブヘッド１は、そのフェース面（打撃面）１０に複数本のスコアライン２０が形成されている。各々のスコアライン２０はトウ−ヒール方向に延設された、互いに平行な直線状の溝である。また、フェース面１０には、複数本の細溝３０、３１、３２が形成されている。   The golf club head 1 has a plurality of score lines 20 formed on its face surface (striking surface) 10. Each score line 20 is a linear groove extending in the toe-heel direction and parallel to each other. In addition, a plurality of narrow grooves 30, 31, 32 are formed on the face surface 10.

細溝３０は、スコアライン２０よりも幅及び深さにおいて小さい溝であって、スコアライン２０と平行にトウ−ヒール方向に延設された直線状の溝である。ここで、細溝３０とスコアライン２０とが平行とは、製造上の誤差等の理由から、これらの無限延長線の交差角が、０度以上２０度以下の場合を含む。   The narrow groove 30 is a groove that is smaller in width and depth than the score line 20, and is a linear groove that extends in the toe-heel direction in parallel with the score line 20. Here, the phrase “the narrow groove 30 and the score line 20 are parallel” includes the case where the crossing angle of these infinitely extended lines is not less than 0 degrees and not more than 20 degrees for reasons such as manufacturing errors.

本実施形態の場合、細溝３０はスコアライン２０の長手方向と直交するｄ１方向に配列されて、複数本形成されている。細溝３０の長さは、その細溝３０に最も近いスコアライン２０の長さ以上であることが好ましい。本実施形態の場合、各細溝３０は途中で途切れることの無い１本の溝であるが、細溝３０の一部又は全部が、部分的に途切れていてもよい。   In the case of the present embodiment, a plurality of narrow grooves 30 are arranged in the d1 direction orthogonal to the longitudinal direction of the score line 20 and are formed in plural. The length of the fine groove 30 is preferably equal to or longer than the length of the score line 20 closest to the fine groove 30. In the present embodiment, each narrow groove 30 is a single groove that is not interrupted in the middle, but a part or all of the narrow groove 30 may be partially interrupted.

細溝３１、３２は、スコアライン２０よりも幅及び深さにおいて小さい溝であって、細溝３０と交差する溝である。細溝３１及び３２は本実施形態の場合、直線状の溝である。   The narrow grooves 31 and 32 are grooves that are smaller in width and depth than the score line 20 and intersect the narrow groove 30. In the case of this embodiment, the narrow grooves 31 and 32 are linear grooves.

図２はフェース面１０の部分断面斜視図、図３（Ａ）はスコアライン２０の、その長手方向（トウ−ヒール方向）に直交する方向の断面図、図３（Ｂ）は細溝３０の、その長手方向に直交する方向の断面図である。まず、スコアライン２０について説明する。   2 is a partial cross-sectional perspective view of the face surface 10, FIG. 3A is a cross-sectional view of the score line 20 in a direction perpendicular to the longitudinal direction (toe-heel direction), and FIG. It is sectional drawing of the direction orthogonal to the longitudinal direction. First, the score line 20 will be described.

本実施形態において、各スコアライン２０は等ピッチで形成されており、スコアライン２０の断面形状は、その長手方向の両端部を除き、同じである。また、各々のスコアライン２０の断面形状は同じである。更に、本実施形態の場合、スコアライン２０の断面形状は、その幅方向の中心線に対して対称である。本実施形態の場合、スコアライン２０の断面形状は台形状であるが、Ｖ字形状等、他の形状でもよい。   In the present embodiment, the score lines 20 are formed at an equal pitch, and the cross-sectional shape of the score lines 20 is the same except for both ends in the longitudinal direction. Each score line 20 has the same cross-sectional shape. Furthermore, in the case of this embodiment, the cross-sectional shape of the score line 20 is symmetric with respect to the center line in the width direction. In the case of this embodiment, the cross-sectional shape of the score line 20 is trapezoidal, but other shapes such as a V shape may be used.

スコアライン２０は、一対の側壁２１及び底壁２２を有する。スコアライン２０の縁２３は側壁２１とフェース面１０との境界部分である。本実施形態では、この縁２３に丸みが形成されているが丸みを形成しない構成も採用可能である。   The score line 20 has a pair of side walls 21 and a bottom wall 22. An edge 23 of the score line 20 is a boundary portion between the side wall 21 and the face surface 10. In the present embodiment, it is possible to adopt a configuration in which the edge 23 is rounded but not rounded.

細溝３０はスコアライン２０と平行に形成されているため、打球のバックスピン量を向上させる。本実施形態の場合、細溝３０は、図３（Ｂ）に示すようにその断面形状が半円状となっているが、台形状、Ｖ字形状等、他の形状でもよい。細溝３０の幅Ｗは、細溝３０の幅Ｗは、例えば、３０μｍ以上６００μｍ以下であることが好ましい。細溝３０の深さＤは、浅すぎるとバックスピン量の向上が低く、深すぎるとボールに傷が付き易くなる。また、競技用ゴルフクラブヘッドでは、フェース面の表面粗さについて一定の制約があり、最大高さ（Ｒｙ）が２５μｍ以下である。したがって、ゴルフクラブヘッド１を競技用とする場合、深さＤは５μｍ以上２５μｍ以下であることが好ましい。   Since the narrow groove 30 is formed in parallel with the score line 20, the backspin amount of the hit ball is improved. In the present embodiment, the narrow groove 30 has a semicircular cross section as shown in FIG. 3B, but may have other shapes such as a trapezoidal shape or a V shape. The width W of the narrow groove 30 is preferably 30 μm or more and 600 μm or less, for example. If the depth D of the narrow groove 30 is too shallow, the improvement in the backspin amount is low, and if it is too deep, the ball is easily damaged. In the golf club head for competition, there is a certain restriction on the surface roughness of the face surface, and the maximum height (Ry) is 25 μm or less. Therefore, when the golf club head 1 is used for competition, the depth D is preferably 5 μm or more and 25 μm or less.

細溝３１及び３２は、細溝３０と交差しており、細溝３０内に溜まる水を排水する水路として機能する。よって、細溝３０に溜まった水は、細溝３１及び３２に排水されるか、或いは、細溝３１及び３２を介して、水が溜まっていない別の細溝３０に排水される。細溝３０に溜まる水が排水されることで、細溝３０による打球のバックスピン量向上の効果が維持される。このため、雨天時等において、バックスピン量の低減抑制効果が向上する。   The narrow grooves 31 and 32 intersect with the narrow groove 30 and function as a water channel for draining water accumulated in the narrow groove 30. Therefore, the water accumulated in the narrow groove 30 is drained into the narrow grooves 31 and 32, or is drained through the narrow grooves 31 and 32 into another narrow groove 30 in which water is not accumulated. By draining the water accumulated in the narrow groove 30, the effect of improving the backspin amount of the hit ball by the narrow groove 30 is maintained. For this reason, the effect of suppressing the reduction of the backspin amount is improved in rainy weather.

細溝３０に溜まる水は、打撃時のボールからの圧力によって細溝３１及び３２へ流れ出て排水される。なお、打撃時以外にも水の自重で排水させる観点から、細溝３１及び３２は上下方向を向いている方が好ましい。ショット時には、細溝３０は水平方向に延びていることから、排水性の観点から細溝３１及び３２と、細溝３０との交差角度は９０度前後、例えば、７５度以上１０５度以下であることが好ましい。   The water accumulated in the narrow groove 30 flows out into the narrow grooves 31 and 32 and is drained by the pressure from the ball at the time of hitting. In addition, it is preferable that the narrow grooves 31 and 32 are directed in the vertical direction from the viewpoint of draining by the weight of water other than at the time of impact. At the time of a shot, since the narrow groove 30 extends in the horizontal direction, the intersection angle between the narrow grooves 31 and 32 and the narrow groove 30 is about 90 degrees, for example, 75 degrees or more and 105 degrees or less from the viewpoint of drainage. It is preferable.

一方、細溝３１及び３２には、排水路としての機能のほか、打球のバックスピン量を向上させる機能も発揮させることができる。細溝３１及び３２は、細溝３０と平行に近い方がバックスピン量が向上する。したがって、バックスピン量の観点から細溝３１及び３２と、細溝３０との交差角度は２０度前後、例えば、５度以上３５度以下であることが好ましい。   On the other hand, in addition to the function as a drainage channel, the narrow grooves 31 and 32 can also exhibit a function of improving the backspin amount of the hit ball. In the narrow grooves 31 and 32, the backspin amount is improved in the direction closer to the parallel with the narrow groove 30. Therefore, from the viewpoint of the backspin amount, the crossing angle between the narrow grooves 31 and 32 and the narrow groove 30 is preferably around 20 degrees, for example, 5 degrees or more and 35 degrees or less.

また、排水性、バックスピン量を総合すると、細溝３１及び３２と、細溝３０との交差角度は２０度以上９０度以下であることが好ましい。   In addition, when the drainage property and the backspin amount are combined, the crossing angle between the narrow grooves 31 and 32 and the narrow groove 30 is preferably 20 degrees or more and 90 degrees or less.

本実施形態の場合、細溝３１と細溝３２とは長さが異なり、細溝３１は４本の細溝３０と交差し、細溝３２は２本の細溝３０と交差している。本実施形態では、このように細溝３０と交差する細溝として、長さが異なる細溝３１及び３２の２種類の細溝を形成したが、１種類の細溝であってもよく、逆に３種類以上であってもよい。いずれの場合においても、各々の細溝３０が、少なくとも１つの細溝と交差することが好ましい。また、本実施形態のように、１つの細溝３１、３２が複数の細溝３０と交差することで、細溝３０に溜まった水は、細溝３１又は３２を介して、水が溜まっていない別の細溝３０に排水することができ、排水効率を高められる。よって、細溝３０と交差する少なくとも１つの細溝が、複数の細溝３０と交差することが好ましい。   In the present embodiment, the narrow groove 31 and the narrow groove 32 have different lengths, the narrow groove 31 intersects with the four narrow grooves 30, and the narrow groove 32 intersects with the two narrow grooves 30. In the present embodiment, the two types of narrow grooves 31 and 32 having different lengths are formed as the narrow grooves intersecting with the narrow grooves 30 in this way. There may be three or more types. In any case, it is preferable that each narrow groove 30 intersects with at least one narrow groove. Further, as in the present embodiment, when one narrow groove 31, 32 intersects with the plurality of narrow grooves 30, the water accumulated in the narrow groove 30 is accumulated through the narrow grooves 31 or 32. It is possible to drain to another narrow groove 30 that is not present, and the drainage efficiency can be increased. Therefore, it is preferable that at least one narrow groove that intersects the narrow groove 30 intersects the plurality of narrow grooves 30.

細溝３１及び３２の断面形状、幅、及び、深さは、細溝３０と同じとしても異なっていてもよい。特に、目的に応じて、細溝３１及び３２と、細溝３０とで、その深さを異ならせることができる。例えば、バックスピン量の増大を重視する場合は、細溝３０を細溝３１及び３２よりも深くしてボールの食い込みをよくする。また、晴天時と雨天時とで水滴に起因するバックスピン量の差を少なくすることを目的とする場合は、細溝３１及び３２を細溝３０よりも深くして排水性を高める。   The cross-sectional shape, width, and depth of the narrow grooves 31 and 32 may be the same as or different from those of the narrow grooves 30. In particular, depending on the purpose, the depths of the narrow grooves 31 and 32 and the narrow groove 30 can be made different. For example, when importance is attached to an increase in the backspin amount, the narrow groove 30 is made deeper than the narrow grooves 31 and 32 to improve the bite of the ball. In addition, when it is intended to reduce the difference in backspin amount caused by water droplets during fine weather and rainy weather, the narrow grooves 31 and 32 are deeper than the narrow grooves 30 to enhance drainage.

本実施形態では、隣接するスコアライン２０間毎に、同じパターンで細溝３０乃至３２が形成されている。これは、打点の位置によってバックスピン量にばらつきが生じることを低減する効果がある。なお、競技用ゴルフクラブヘッドでは、フェース面の表面粗さについて一定の制約があり、最大高さ（Ｒｙ）が２５μｍ以下、算術平均粗さが４．５７μｍ以下である。よって、ゴルフクラブヘッド１を競技用とする場合は、このような表面粗さのルールを満たすように細溝３０乃至３２を設計する。   In the present embodiment, narrow grooves 30 to 32 are formed in the same pattern between adjacent score lines 20. This has the effect of reducing variations in the backspin amount depending on the position of the hit point. In the golf club head for competition, there are certain restrictions on the surface roughness of the face surface, the maximum height (Ry) is 25 μm or less, and the arithmetic average roughness is 4.57 μm or less. Therefore, when the golf club head 1 is used for competition, the narrow grooves 30 to 32 are designed so as to satisfy such a rule of surface roughness.

次に、スコアライン２０及び細溝３０乃至３２の形成方法について説明する。スコアライン２０は、例えば、鍛造、鋳造、切削加工、レーザ加工により形成することができる。細溝３０乃至３２は、例えば、切削加工、レーザー加工により形成することができる。なお、細溝３０と、これと交差する細溝３１及び３２とでは、異なる加工方法を採用してもよい。   Next, a method for forming the score line 20 and the narrow grooves 30 to 32 will be described. The score line 20 can be formed by, for example, forging, casting, cutting, or laser processing. The narrow grooves 30 to 32 can be formed by, for example, cutting or laser processing. In addition, you may employ | adopt a different processing method with the fine groove 30 and the fine grooves 31 and 32 which cross | intersect this.

ここでは、スコアライン２０を鍛造により形成し、細溝３０乃至３２をミーリング加工により形成する場合を図４及び図５を参照して説明する。図４は細溝３０を形成する前の一次成形品１'を示す断面図であり、図５はＮＣフライス盤による細溝３０乃至３２の形成方法の説明図である。   Here, the case where the score line 20 is formed by forging and the narrow grooves 30 to 32 are formed by milling will be described with reference to FIGS. 4 and 5. FIG. 4 is a cross-sectional view showing the primary molded product 1 ′ before forming the narrow groove 30, and FIG. 5 is an explanatory view of a method for forming the narrow grooves 30 to 32 using an NC milling machine.

まず、図４に示すように、スコアライン２０が鍛造により形成されたゴルフクラブヘッド１の一次成形品１'を作成する。一次成形品１'においては、フェース面１０に相当する面１０'に細溝３０乃至３２が未加工である。   First, as shown in FIG. 4, a primary molded product 1 ′ of the golf club head 1 in which the score line 20 is formed by forging is created. In the primary molded product 1 ′, the narrow grooves 30 to 32 are not processed on the surface 10 ′ corresponding to the face surface 10.

次に、細溝３０をミーリング加工により形成する。図５に示すように、細溝３０が未加工の一次成形品１'はＮＣフライス盤に治具２を介して固定される。なお、本実施形態の場合、フェース面１０がゴルフクラブヘッドに一体成形された場合について説明するが、フェース面１０を構成するフェース部材と、ヘッド本体とを別部材として接合してもよい。   Next, the narrow groove 30 is formed by milling. As shown in FIG. 5, the primary molded product 1 ′ in which the narrow groove 30 is not processed is fixed to an NC milling machine via a jig 2. In the present embodiment, the case where the face surface 10 is integrally formed with the golf club head will be described. However, the face member constituting the face surface 10 and the head body may be joined as separate members.

ＮＣフライス盤は、Ｚ軸回りに回転駆動されるスピンドル４を有し、スピンドル４の下端には切削ツール（エンドミル）５が取り付けられている。切削ツール５の先端形状は細溝３０の断面形状に応じたものを使用する。   The NC milling machine has a spindle 4 that is driven to rotate about the Z axis, and a cutting tool (end mill) 5 is attached to the lower end of the spindle 4. The tip shape of the cutting tool 5 is in accordance with the cross-sectional shape of the narrow groove 30.

しかして、ＮＣフライス盤において、フェース面１０の平面座標を設定した後、スピンドル４を回転駆動し、フェース面１０（一次成形品１'）又は切削ツール５を細溝３０の形成方向に相対的に移動しながら、フェース面１０を切削する。一つの細溝３０を形成すると、切削ツール５をフェース面１０から離間させた後、細溝３０の配列方向に切削ツール５を相対的に移動し、次の細溝３０を形成することで、順次細溝３０が形成される。細溝３１及び３２も同様の方式で形成することができる。   Thus, in the NC milling machine, after setting the plane coordinates of the face surface 10, the spindle 4 is rotated and the face surface 10 (primary molded product 1 ′) or the cutting tool 5 is relatively moved in the direction in which the narrow grooves 30 are formed. The face surface 10 is cut while moving. When one narrow groove 30 is formed, after the cutting tool 5 is separated from the face surface 10, the cutting tool 5 is relatively moved in the arrangement direction of the narrow grooves 30 to form the next narrow groove 30. Sequentially narrow grooves 30 are formed. The narrow grooves 31 and 32 can also be formed in the same manner.

フェース面１０に細溝３０乃至３２を形成すると、フェース面１０が磨耗し易くなる場合がある。そのため、細溝３０乃至３２の形成後、フェース面１０の硬度を硬くする表面処理を行うことが好ましい。このような表面処理としては、浸炭処理、窒化処理、軟窒化処理、ＰＶＤ（Physical Vepor Deposition）処理、イオンプレーティング、ＤＬＣ（ダイヤモンド ライク カーボン）処理、めっき処理等が挙げられる。特に、浸炭処理や窒化処理といった、表面に別の金属層を形成せず、表面を改質する表面処理が好ましい。   If the narrow grooves 30 to 32 are formed on the face surface 10, the face surface 10 may be easily worn. Therefore, it is preferable to perform a surface treatment for increasing the hardness of the face surface 10 after forming the narrow grooves 30 to 32. Examples of such surface treatment include carburizing treatment, nitriding treatment, soft nitriding treatment, PVD (Physical Vepor Deposition) treatment, ion plating, DLC (diamond-like carbon) treatment, and plating treatment. In particular, surface treatment that modifies the surface without forming another metal layer on the surface, such as carburizing treatment or nitriding treatment, is preferable.

＜第２実施形態＞
細溝３０の縁を盛り上げることで、バックスピン量を更に向上できる。図３（Ｃ）は本実施形態における細溝３０の断面図である。細溝３０の縁は、隆起部３０ａが形成されて盛り上がっており、ボールとの食い込みがよくなってバックスピン量を更に向上できる。隆起部３０ａは、例えば、細溝３０をレーザー加工で形成する場合は、レーザ加工によって自然に形成できる。また、細溝３０を切削加工で形成する場合は、切削を粗めにすることで、バリとして形成できる。 Second Embodiment
Raising the edge of the narrow groove 30 can further improve the backspin amount. FIG. 3C is a cross-sectional view of the narrow groove 30 in the present embodiment. The edge of the narrow groove 30 is raised with a raised portion 30a, so that the bite with the ball is improved and the backspin amount can be further improved. For example, when the narrow groove 30 is formed by laser processing, the raised portion 30a can be naturally formed by laser processing. Moreover, when forming the fine groove 30 by cutting, it can form as a burr | flash by roughening cutting.

＜第３実施形態＞
細溝３０と交差する細溝は、スコアライン２０の縁２３から形成されていてもよい。図６は細溝３１の他の例を示すフェース面１０の部分断面斜視図である。同図の例の場合、細溝３１がスコアライン２１の縁２３から形成されている。縁２３から細溝３１を形成することで、スコアライン２１と細溝３１とが連通する。このため、細溝３１内の水をスコアライン２１に排水することができ、細溝３０の排水性を更に向上できる。 <Third Embodiment>
The narrow groove intersecting with the narrow groove 30 may be formed from the edge 23 of the score line 20. FIG. 6 is a partial sectional perspective view of the face surface 10 showing another example of the narrow groove 31. In the case of the example shown in the figure, the narrow groove 31 is formed from the edge 23 of the score line 21. By forming the narrow groove 31 from the edge 23, the score line 21 and the narrow groove 31 communicate with each other. For this reason, the water in the narrow groove 31 can be drained to the score line 21, and the drainage of the narrow groove 30 can be further improved.

＜他の実施形態＞
以上、本発明の複数の実施形態を説明したが、これらの実施形態は互いに組合せることが可能であることは言うまでもない。 <Other embodiments>
Although a plurality of embodiments of the present invention have been described above, it goes without saying that these embodiments can be combined with each other.

Claims (9)

フェース面に複数本のスコアラインが形成されたゴルフクラブヘッドにおいて、
前記フェース面に形成され、前記スコアラインと平行な第１細溝と、
前記フェース面に形成され、前記第１細溝と交差する第２細溝と、
を備えたことを特徴とするゴルフクラブヘッド。 In a golf club head having a plurality of score lines formed on the face surface,
A first narrow groove formed on the face surface and parallel to the score line;
A second narrow groove formed on the face surface and intersecting the first narrow groove;
A golf club head comprising: 隣接する前記スコアライン間に、前記第１細溝が前記スコアラインと直交する方向に配列されて複数形成され、
前記第２細溝が複数形成され、
隣接する前記スコアライン間に形成された各々の前記第１細溝は、少なくともいずれか１つの前記第２細溝と交差していることを特徴とする請求項１に記載のゴルフクラブヘッド。 Between the adjacent score lines, a plurality of the first narrow grooves are arranged in a direction orthogonal to the score lines,
A plurality of the second narrow grooves are formed;
2. The golf club head according to claim 1, wherein each of the first narrow grooves formed between the adjacent score lines intersects with at least one of the second narrow grooves. 隣接する前記スコアライン間に、前記第１細溝が前記スコアラインと直交する方向に配列されて複数形成され、
前記第２細溝が複数形成され、
少なくともいずれか１つの前記第２細溝が、隣接する前記スコアライン間に形成された２以上の前記第１細溝と交差していることを特徴とする請求項１に記載のゴルフクラブヘッド。 Between the adjacent score lines, a plurality of the first narrow grooves are arranged in a direction orthogonal to the score lines,
A plurality of the second narrow grooves are formed;
2. The golf club head according to claim 1, wherein at least one of the second narrow grooves intersects with two or more first narrow grooves formed between the adjacent score lines. 前記第２細溝は、前記スコアラインの縁から形成されていることを特徴とする請求項１に記載のゴルフクラブヘッド。   The golf club head according to claim 1, wherein the second narrow groove is formed from an edge of the score line. 前記第１及び第２細溝が、切削加工又はレーザ加工により形成されたことを特徴とする請求項１に記載のゴルフクラブヘッド。   The golf club head according to claim 1, wherein the first and second narrow grooves are formed by cutting or laser processing. 前記第１細溝の縁が盛り上がっていることを特徴とする請求項１に記載のゴルフクラブヘッド。   The golf club head according to claim 1, wherein an edge of the first narrow groove is raised. 前記第１細溝と前記第２細溝との交差角度が、２０度以上９０度以下であることを特徴とする請求項１に記載のゴルフクラブヘッド。   2. The golf club head according to claim 1, wherein an intersection angle between the first narrow groove and the second narrow groove is 20 degrees or more and 90 degrees or less. 前記第１細溝と前記第２細溝とは、深さが異なることを特徴とする請求項１に記載のゴルフクラブヘッド。   The golf club head according to claim 1, wherein the first narrow groove and the second narrow groove have different depths. 前記第１及び第２細溝の深さが、５μｍ以上２５μｍ以下であることを特徴とする請求項１に記載のゴルフクラブヘッド。   2. The golf club head according to claim 1, wherein a depth of the first and second narrow grooves is 5 μm or more and 25 μm or less.
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