JP2001212270A - Iron club head - Google Patents
Iron club headInfo
- Publication number
- JP2001212270A JP2001212270A JP2000025849A JP2000025849A JP2001212270A JP 2001212270 A JP2001212270 A JP 2001212270A JP 2000025849 A JP2000025849 A JP 2000025849A JP 2000025849 A JP2000025849 A JP 2000025849A JP 2001212270 A JP2001212270 A JP 2001212270A
- Authority
- JP
- Japan
- Prior art keywords
- gravity
- center
- head
- specific gravity
- club head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Landscapes
- Golf Clubs (AREA)
Abstract
Description
【０００１】[0001]
【発明が属する技術分野】比重の異なる複数の異種材料
を組み合わせて構成されるアイアンクラブヘッドについ
て、ヘッド重心の適正な設定に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a proper setting of the center of gravity of an iron club head constituted by combining a plurality of different materials having different specific gravities.
【０００２】[0002]
【従来の技術】クラブヘッドの性能を向上する設計要素
として、ヘッドの重心がある。特に、アイアンクラブの
場合では、打球が高く上がり易くなるように、また強い
打球で飛距離が伸びるように、ヘッド重心を低く設定す
るための工夫が、従来より、種々提案されている。例え
ば、ソールなどのヘッドの低い位置にヘッド本体よりも
出来るだけ比重の大きな材料を配置又は付加したり、シ
ャフトを挿着するホーゼルの長さを短くしたり、またヘ
ッド上部の肉厚を減少して減少した重量をソール側に配
分したりする手段が行われている。2. Description of the Related Art A design factor for improving the performance of a club head is the center of gravity of the head. In particular, in the case of an iron club, various devices have been proposed for setting the center of gravity of the head low so that the hit ball can be easily raised and the flight distance can be increased with a strong hit ball. For example, a material with a higher specific gravity than the head body is placed or added to the lower position of the head such as the sole, the length of the hosel for inserting the shaft is shortened, and the thickness of the upper part of the head is reduced. Means of distributing the reduced weight to the sole side have been taken.
【０００３】[0003]
【発明が解決しようとする課題】しかるに、従来の重心
設定の方法では、単に、出来るだけ比重の重い部材を、
出来るだけヘッドのソ−ル側に近い位置に配置するだけ
であって、どれくらい重いものをヘッドのソ−ル部にど
れだけ近づけて配置するかなどの定量的な把握が十分に
為されていない状況であった。特に、前記比重の重い部
材の重さ及びそれが配置される位置と打球の飛距離又は
弾道との関係については定量的な解明が未だ為されてお
らず、またこのような解明を基にして設計された製品が
実用化され市場に提供されていないのが実情である。However, in the conventional method of setting the center of gravity, a member having a specific gravity as large as possible is simply used.
It is only located as close as possible to the head side of the head, and quantitative understanding of how close a heavy object is to the head part of the head is not sufficiently made. It was a situation. In particular, the relationship between the weight of the heavy member and the position at which it is disposed and the flight distance or trajectory of the hit ball has not yet been quantitatively elucidated, and based on such elucidation. The fact is that the designed products have not been put to practical use and are not offered to the market.
【０００４】このため、ヘッドが低重心化されたと謳わ
れた製品であっても、実際は打球が思った程に高く上が
らず飛距離のバラツキが大きくて飛距離が期待した程出
ない結果となっていたり、またヘッド重量が過剰に増加
してクラブのスイングバランスを不良にしてスイングし
憎いクラブとなっていることが屡々発生している。従っ
て、このような実情に鑑みて本発明の目的とするところ
は、ヘッドの重心位置を移動する構成材料の重量と配置
を最適化して、打球の飛距離のバラツキを少なくすると
共に飛距離が延びるアイアンクラブヘッドを提供するこ
とである。[0004] For this reason, even if the head is claimed to have a low center of gravity, the hit ball does not actually rise as high as expected and the flight distance varies widely, so that the flight distance does not come out as expected. In some cases, the club weight is excessively increased, and the swing balance of the club is degraded due to an excessive increase in the head weight. Therefore, in view of such circumstances, it is an object of the present invention to optimize the weight and arrangement of the constituent materials for moving the position of the center of gravity of the head, thereby reducing the variation in the flight distance of the hit ball and extending the flight distance. It is to provide an iron club head.
【０００５】[0005]
【課題を解決するための手段】前記の目的を達成するた
めに、本発明に係わるアイアンクラブヘドでは、請求項
１に記載されるように、少なくとも２種以上の金属材料
から成るアイアンクラブヘッドであって、ヘッド総重量
に対して５％以上の重量を有する同一材料から成る部材
に関して、比重の最も軽い材料から成る部材を第１の部
材とし、第１の部材よりも比重の重い少なくとも一種以
上の部材を第2の部材として、ヘッド総重量に対する第2
の部材の重量比率Ｒ（％）と、第1の部材の重心と第2の
部材の重心との間をフェース面に平行に測定した距離と
される重心間距離Ｌ（ｍｍ）との関係が次式、 Ｌ>０．０１１３×Ｒ2−１．１３×Ｒ＋３６．８２ を満足するようにされている。In order to achieve the above object, an iron club head according to the present invention comprises an iron club head made of at least two kinds of metallic materials. With respect to a member made of the same material having a weight of 5% or more with respect to the total weight of the head, a member made of a material having the lightest specific gravity is used as a first member, and at least one member having a specific gravity heavier than the first member is used. Of the head as the second member,
The relationship between the weight ratio R (%) of the member and the distance L (mm) between the centers of gravity, which is the distance measured between the center of gravity of the first member and the center of gravity of the second member in parallel with the face surface, is as follows. The following formula is satisfied: L> 0.0113 × R 2 −1.13 × R + 36.82.
【０００６】先ず、ヘッドが複数の比重の異なる部材で
構成されている場合に、重心の移動がどのような要素に
よって説明出来るかについて考察を行った。この際、ヘ
ッドは、考察を容易にするために、比重の小さな部材と
大きな部材の２種類の部材から構成されている場合とさ
れた。即ち、図４に示すような２種の部材から成る単純
なモデルにおける重心の移動が考察された。First, when the head is composed of a plurality of members having different specific gravities, consideration was given to what factors can explain the movement of the center of gravity. At this time, the head is assumed to be composed of two kinds of members, a member having a small specific gravity and a member having a large specific gravity, for easy consideration. That is, the shift of the center of gravity in a simple model including two types of members as shown in FIG. 4 was considered.
【０００７】同図において、Ａ点に重量Ｗａの比重の小
さな第１の部材の重心があり、これよりＬだけ離れた位
置Ｂ点に重量Ｗｂの比重の大きな第２の部材の重心があ
るとし、また両部材によって合成された重心をＧ点とす
ると、比重の小さな第１の部材の重心Ａ点から前記Ｇ点
までの距離とされる重心の移動量Ｉｘは、次式， Ｉｘ＝Ｌ×Ｗｂ／（Ｗａ＋Ｗｂ） で決定されることになる。即ち、重心の移動量Ｉｘは、
異種部材間の重心間距離であるＬと比重の大きな第２の
部材の重量比率（Ｗｂ／Ｗａ＋Ｗｂ）の二つの要素によ
って決定されると考えることが出来る。In FIG. 1, it is assumed that a point A has a center of gravity of the first member having a small specific gravity of the weight Wa, and a point B which is further away by L has a center of gravity of the second member having a large specific gravity of the weight Wb. Also, assuming that the center of gravity synthesized by both members is point G, the amount of movement Ix of the center of gravity, which is the distance from the point A of center of gravity of the first member having a small specific gravity to the point G, is represented by the following equation: Ix = L × Wb / (Wa + Wb) will be determined. That is, the movement amount Ix of the center of gravity is
It can be considered that it is determined by two factors: L, which is the distance between the centers of gravity between different kinds of members, and the weight ratio (Wb / Wa + Wb) of the second member having a large specific gravity.
【０００８】次に、発明者は、この二つの要素に着目し
てこれらの要素が重心の移動に及ぼす影響について実際
のアイアンクラブヘッドを用いてコンピューターシュミ
レーション実験により下記の様に定量的な検討を行っ
た。即ち、図５（ａ）に示される全体が軟鉄製のごく一
般的な５番アイアンクラブを基準クラブとして、この基
準クラブのヘッドとヘッド体積を同一とした上で、図
５、（ｂ）〜（ｄ）の各図に示すように、比重の大きな
第２の部材（例えば、タングステン）をヘッドのソール
最下端から順次上方に配置し、また残りのヘッド部分に
は比重の小さな第１の部材（例えば、チタニウム合金）
を配置して、異種部材間の重心間距離Ｌを順次変化させ
た試験クラブヘッドを設定し、しかもこれらの試験クラ
ブヘッドについて第２の部材の重量比率（Ｒ）を５８．
５％、６８％，８２％の３段階に変更した場合につい
て、重心の移動量（Ｉｘ）を求め、更に、この移動量か
ら「前記基準クラブの重心位置から各試験クラブヘッド
の重心位置への重心移動量」即ち低重心化量（Ｅ）が計
算された。Next, the inventor paid attention to these two factors, and conducted a computer simulation experiment using an actual iron club head to examine the effects of these factors on the shift of the center of gravity, as described below. went. In other words, a very common 5 iron club made entirely of soft iron as shown in FIG. 5A is used as a reference club, and the head and the head volume of this reference club are made the same. As shown in each figure of (d), a second member (for example, tungsten) having a large specific gravity is sequentially arranged upward from the lowermost end of the sole of the head, and a first member having a small specific gravity is provided on the remaining head portion. (For example, titanium alloy)
Are arranged to set test club heads in which the distance L between the centers of gravity between different types of members is sequentially changed, and the weight ratio (R) of the second member to these test club heads is 58.
With respect to the case of changing to three stages of 5%, 68%, and 82%, the movement amount (Ix) of the center of gravity is obtained, and based on this movement amount, "from the center of gravity of the reference club to the center of gravity of each test club head" The "center of gravity shift", that is, the low center of gravity (E) was calculated.
【０００９】結果を、図６の表１〜３に示す。これらの
表から、異種部材間の重心間距離（Ｌ）が大きくなるに
つれ、また第２部材の重量比率（Ｒ）が小さくなるにつ
れて、前記の低重心化量（Ｅ）が大きくなる関係にある
ことが判る。この関係をグラフ化したものを図７に示
す。尚、本発明において、異種部材間の重心間距離
（Ｌ）及び前記重心の移動量（Ｉｘ）は、ヘッドの側面
図に投影された重心間の距離をフェース面に平行に計測
するものとする。The results are shown in Tables 1 to 3 in FIG. From these tables, it can be seen that the lowering of the center of gravity (E) increases as the distance (L) between the centers of gravity between the different members increases and as the weight ratio (R) of the second member decreases. You can see that. FIG. 7 shows a graph of this relationship. In the present invention, the distance (L) between the centers of gravity between the different types of members and the movement amount (Ix) of the center of gravity are measured by measuring the distance between the centers of gravity projected on a side view of the head in parallel with the face surface. .
【００１０】一方これとは別に、重心移動量と打球の飛
距離の関係について、同様にコンピューターシュミレー
ション実験によって、検討を実施した。一般に、フェア
ウエイ上にあるボールをアイアンクラブで打撃する場
合、理想的な打撃が為された際には、ボールとフェース
面との接触点ＨＰとヘッドのフェース面上の重心位置Ｆ
Ｇとの関係は、図８の５番アイアンの例に示すように、
通常は、接触点に対して重心位置が高い位置関係となっ
ている。On the other hand, the relationship between the amount of movement of the center of gravity and the flight distance of the hit ball was separately examined by computer simulation experiments. Generally, when hitting a ball on the fairway with an iron club, when an ideal hit is made, the contact point HP between the ball and the face and the center of gravity F on the face of the head
The relationship with G is as shown in the example of the 5-iron in FIG.
Usually, the position of the center of gravity is high relative to the contact point.
【００１１】そこで、前記接触点ＨＰで理想的な打撃が
行われた際のボールの飛距離（キャリー）が、ヘッドの
重心位置が下方へ移動された場合に、どのように変化す
るかをコンピューターシュミレーションで確認した。そ
の結果を図９に曲線Ａで示す。しかして、一般技量のア
ベレージゴルファーが打撃した際にフェース面上の打点
のバラツキは、発明者の研究によれば、５ｍｍ程度であ
ることから、前記のフェアウエイ上のボールを打撃する
場合に打点が前記接触点ＨＰの下方に最大５ｍｍずれた
場合における飛距離（キャリー）を、同様に、ヘッドの
重心位置を下方へ移動しながら確認した結果を同図に曲
線Ｂで示す。Therefore, it is determined how the flight distance (carry) of the ball when an ideal hit is made at the contact point HP changes when the center of gravity of the head is moved downward. Confirmed by simulation. The result is shown by curve A in FIG. However, according to a study by the inventor, the variation of the hit point on the face surface when an average golfer of general skill hits the ball is about 5 mm. The curve B shows the result of confirming the flight distance (carry) when the head is shifted by a maximum of 5 mm below the contact point HP while similarly moving the center of gravity of the head downward.
【００１２】これらの結果から明らかのように、重心位
置が下がるにつれて飛距離が増加している。また、前記
曲線Ａと曲線Ｂとに挟まれる領域が、アベレージゴルフ
ァーの飛距離のバラツキ範囲である。更に、この図から
アベレージゴルファーの飛距離のバラツキを半減するに
は、重心移動量即ち前記低重心化量を約３ｍｍ以上とす
れば良いことがわかる。尚又、同様なシュミレーション
実験を同一銘柄の９番アイアンで実施した結果、矢張り
前記低重心化量を約３ｍｍ以上とすれば良いことが確認
された（データ省略）。従って、アベレージゴルファー
の飛距離のバラツキを半減するには、前記の低重心化量
即ち基準としたクラブヘッドの重心位置からの重心移動
量を少なくとも３ｍｍとすれば良いとの結論を導くこと
が出来る。As apparent from these results, the flight distance increases as the position of the center of gravity decreases. The area between the curves A and B is the range of variation of the average golfer's flight distance. Further, from this figure, it can be seen that in order to reduce the variation in the flight distance of the average golfer to half, the amount of movement of the center of gravity, that is, the amount of lowering the center of gravity, should be about 3 mm or more. In addition, as a result of conducting a similar simulation experiment with the same brand of 9 iron, it was confirmed that the lowering of the center of gravity should be about 3 mm or more (data omitted). Accordingly, it can be concluded that in order to reduce the variation in the flight distance of the average golfer by half, it is sufficient to set the above-mentioned amount of lowering of the center of gravity, that is, the amount of movement of the center of gravity from the center of gravity of the club head at least 3 mm. .
【００１３】次に、この結論を基にして、前記図７のグ
ラフにおいて、各々の重量比率（Ｒ）に対して、低重心
化量（Ｅ）が３ｍｍとなる異種部材間の重心間距離
（Ｌ）を求め、重量比率（Ｒ）と前記重心間距離（Ｌ）
との関係をグラフ化すると図１０に示す通りとなり、こ
れより下記の近似式、Ｌ>０．０１１３×Ｒ2−１．１３
×Ｒ＋３６．８２が得られ、これを満足すれば、前記し
た本発明の目的が達成されることとなる。Next, based on this conclusion, in the graph of FIG. 7 described above, for each weight ratio (R), the distance between the centers of gravity between the dissimilar members in which the amount of reduction in the center of gravity (E) is 3 mm (3) L), and the weight ratio (R) and the distance between the centers of gravity (L)
FIG. 10 is a graph showing the relationship between the above equation and the following approximate expression: L> 0.0113 × R 2 −1.13
× R + 36.82 was obtained, and if this was satisfied, the above-mentioned object of the present invention would be achieved.
【００１４】尚また、本発明においては、フェース面の
背面がキャビティ構造とされないことが望ましい。キャ
ビティ構造では、ヘッドの慣性モーメントを増加する目
的で、ヘッドの背面にキャビティ（大きな窪み）を穿設
してこれにより減少した重量がヘッドの周囲に分散され
るために重心が効果的に下がり難い特徴があるからであ
る。加えて、第2の部材を配置するスペースが狭くなり
勝ちであって前記低重心化量が意図通りに達成され難い
ことがあるからである。Further, in the present invention, it is desirable that the back surface of the face surface does not have a cavity structure. In the cavity structure, in order to increase the moment of inertia of the head, a cavity (a large depression) is formed in the back surface of the head, whereby the reduced weight is dispersed around the head, so that the center of gravity is hardly lowered effectively. Because there is a characteristic. In addition, the space for arranging the second member is likely to be narrowed, and it is difficult to achieve the lowering of the center of gravity as intended.
【００１５】更に、本発明では、従来より多用されてき
た全体が鉄製とされたアイアンクラブヘッドからの改良
即ち打球性能の向上を主目的としているので、前記第2
の部材の材質の選定に当たっては、鉄の比重（７．８ｇ
／ｍｌ）よりも著しく大きな比重を持つ材料を選択する
のが好ましい、例えば、比重が８．２ｇ／ｍｌ程度の銅
合金では、意図する前記低重心化量が容易に達成できな
い惧れがあるので、第2の部材の材質としては、その部
材の比重を１０ｇ／ｍｌ以上に成し易いタングステン合
金などを選定することが好ましい。Further, in the present invention, the main object of the present invention is to improve the iron club head, which has been frequently used, and is made of iron, so that the hitting performance is improved.
In selecting the material of the member, the specific gravity of iron (7.8 g
/ Ml), it is preferable to select a material having a specific gravity significantly larger than the specific gravity of, for example, a copper alloy having a specific gravity of about 8.2 g / ml. As a material of the second member, it is preferable to select a tungsten alloy or the like which can easily achieve a specific gravity of the member of 10 g / ml or more.
【００１６】[0016]
【発明の実施の形態】図１〜３に基づいて、本発明に係
わる実施例を説明する。図１は、本発明に係わる実施例
１の５番アイアンクラブヘッドを示すもので、図１
（ａ）は、その正面図を、また図（ｂ）は、側面図を示
す。図１（ａ）及び（ｂ）に示されるように、本実施例
では、比重の小さな第１の部材２は、ヘッド１の上部
（リーディングエッジ３から１５ｍｍより上の領域）と
下部（リーディングエッジ３から上６ｍｍ迄の領域）に
配置されていて、その材質を比重４．４ｇ／ｍｌのチタ
ニウム合金とされ、全重量を１０８．８ｇ（１．０７
Ｎ）、またヘッドに占める全体積を２４．７ｍｌとされ
ている。また、この第１の部材２の重心位置は、図２の
側面図で、ソール４の前方端とされるヘッド１のリーデ
ィングエッジ３からフェース面に平行に２７．６ｍｍの
位置に設定されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to FIGS. FIG. 1 shows a No. 5 iron club head according to a first embodiment of the present invention.
(A) shows the front view and FIG. (B) shows the side view. As shown in FIGS. 1A and 1B, in the present embodiment, the first member 2 having a small specific gravity includes an upper portion (a region above 15 mm from the leading edge 3) and a lower portion (a leading edge 3) of the head 1. 3 to 6 mm above), the material is a titanium alloy having a specific gravity of 4.4 g / ml, and the total weight is 108.8 g (1.07 g).
N), and the total volume occupying the head is set to 24.7 ml. The position of the center of gravity of the first member 2 is set at a position 27.6 mm parallel to the face surface from the leading edge 3 of the head 1 which is the front end of the sole 4 in the side view of FIG. .
【００１７】また、図１（ａ）にて、ヘッド１のリーデ
ィングエッジ３から６．２ｍｍ〜１５ｍｍの領域に、比
重の大きな第２の部材５がトウ６からヒール７まで帯状
に配置されている。第２の部材５は、その材質を比重１
７．３ｇ／ｍｌのタングステン合金とされ、ヘッド１に
占める体積を８．９ｍｌ、その重量を１５３．２ｇ
（１．５０１Ｎ）とされている。また、第２の部材５の
重心位置は、図１（ｂ）に示されるように、ヘッド１の
リーディングエッジ３からフェース面に平行に１５．５
ｍｍの位置に設定されている。このように２種類の異種
材料が配置されたヘッド全体の重心は、図１（ｂ）に
て、リーディングエッジ３からフェース面に平行に２
０．５ｍｍの位置となっている。In FIG. 1A, a second member 5 having a large specific gravity is arranged in a band from the toe 6 to the heel 7 in a region of 6.2 mm to 15 mm from the leading edge 3 of the head 1. . The second member 5 has a specific gravity of 1
It is a tungsten alloy of 7.3 g / ml, occupies a volume of 8.9 ml in the head 1 and weighs 153.2 g.
(1.501N). As shown in FIG. 1B, the center of gravity of the second member 5 extends from the leading edge 3 of the head 1 to 15.5 parallel to the face surface.
mm. As shown in FIG. 1B, the center of gravity of the entire head on which the two kinds of different materials are arranged is 2 parallel from the leading edge 3 to the face surface.
The position is 0.5 mm.
【００１８】一方、実施例のクラブヘッドの基準とされ
た従来品の一般的な５番アイアンクラブヘッドを図３に
示す。この基準クラブのヘッド１は、その材質を比重
７，８２ｇ/mlの軟鉄とされ、図に示される長さのホー
ゼル８を含む体積を３３．５９ｍｌ、重量を各実施例と
略同等の２６４．４ｇ（２．５９１Ｎ）とされている。
また、重心の位置は、リーディングエッジ３からフェー
ス面に平行に２４．４ｍｍの位置に設定されている。On the other hand, FIG. 3 shows a general 5-iron club head of a conventional product used as a reference for the club head of the embodiment. The head 1 of this reference club is made of soft iron having a specific gravity of 7,82 g / ml, has a volume of 33.59 ml including a hosel 8 having a length shown in the figure, and has a weight of 264. 4 g (2.591 N).
The position of the center of gravity is set at a position of 24.4 mm from the leading edge 3 in parallel with the face surface.
【００１９】従って、実施例１の場合に、低重心化量即
ち基準としたクラブヘッドの重心位置からの重心移動量
は３．９ｍｍとなり、本発明が要求する３ｍｍ以上の移
動量が確保されている。また、実施例では、第１の部材
２の重心と前記第２の部材５の重心との間でフェース面
９に平行に測られた距離である重心間距離（Ｌ）が、１
２．１ｍｍ、また第２の部材５の重量比率（Ｒ）が、５
８．５％となっており、この結果を、図１０にプロット
してみると、同図内に二重丸印で示した通り本発明の請
求項に記載する関係式に適合する関係が成立しているこ
とが判る。従って、本実施例のクラブヘッドによれば、
本発明の目的としたバラツキが少なく大きな飛距離を実
現することが出来る。Therefore, in the case of the first embodiment, the amount of lowering of the center of gravity, that is, the amount of movement of the center of gravity of the club head from the center of gravity of the club head is 3.9 mm, and the amount of movement of 3 mm or more required by the present invention is secured. I have. In the embodiment, the distance (L) between the centers of gravity (L), which is a distance measured parallel to the face surface 9, between the center of gravity of the first member 2 and the center of gravity of the second member 5 is 1
2.1 mm, and the weight ratio (R) of the second member 5 is 5
When this result is plotted in FIG. 10, a relationship that meets the relational expression described in the claims of the present invention is established as shown by a double circle in FIG. 10. You can see that it is. Therefore, according to the club head of the present embodiment,
It is possible to realize a large flight distance with little variation aimed at by the present invention.
【００２０】次に、本発明に係わる実施例２について以
下に説明する。図２は、本発明に係わる実施例２の５番
アイアンクラブヘッドを示すもので、図２（ａ）は、そ
の正面図を、また図（ｂ）は、側面図を示す。図２
（ａ）及び（ｂ）に示されるように、本実施例では、比
重の小さな第１の部材２は、ヘッド１の上部（リーディ
ングエッジ３から１８．５ｍｍより上の領域）に配置さ
れていて、その材質を比重４．４ｇ／ｍｌのチタニウム
合金とされ、全重量を７４ｇ（０．７２５Ｎ）、またヘ
ッド１に占める全体積を１６．８ｍｌとされている。ま
た、この第１の部材２の重心位置は、図２の側面図で、
ヘッド１のリーディングエッジ３からフェース面に平行
に３３．５ｍｍの位置に設定されている。Next, a second embodiment according to the present invention will be described below. FIG. 2 shows a No. 5 iron club head according to a second embodiment of the present invention. FIG. 2 (a) is a front view and FIG. 2 (b) is a side view. FIG.
As shown in (a) and (b), in the present embodiment, the first member 2 having a low specific gravity is disposed above the head 1 (an area higher than the leading edge 3 by 18.5 mm). The material is a titanium alloy having a specific gravity of 4.4 g / ml, the total weight is 74 g (0.725 N), and the total volume occupying the head 1 is 16.8 ml. The position of the center of gravity of the first member 2 is shown in a side view of FIG.
It is set at a position of 33.5 mm from the leading edge 3 of the head 1 parallel to the face surface.
【００２１】また、図２（ａ）にて、ヘッド１のリーデ
ィングエッジ３から６．０ｍｍ〜１８．５ｍｍの領域
に、比重８．２６ｇ／ｍｌのＢｅ−Ｃｕ合金を材質とし
た高比重部材がトウ６からヒール７まで帯状に配置され
ている。また、このＢｅ−Ｃｕ合金の高比重部材のヘッ
ドに占める体積を１２．４ｍｌ、その重量を１０２．４
ｇ（１．００４Ｎ）とされている。更に、ヘッド１のリ
ーディングエッジ３から６．０ｍｍより下方の領域に、
比重１７．３ｇ／ｍｌのタングステン合金を材質とした
別の高比重部材がトウ６からヒール７まで帯状に配置さ
れている。また、このタングステン合金の高比重部材の
ヘッド１に占める体積を４．６３ｍｌ、その重量を８
０．１ｇ（０．７８５Ｎ）とされている。従って、これ
ら二つの高比重部材を組み合わせたものとされる本発明
の第２の部材５としての重心の位置は、リーディングエ
ッジ３からフェース面に平行に１２．５ｍｍの所に設定
されている。また、この第２の部材５のヘッド１に占め
る体積は１７ｍｌ、またその重量は１８２．５ｇ（１．
７８９Ｎ）とされている。In FIG. 2A, a high specific gravity member made of a Be-Cu alloy having a specific gravity of 8.26 g / ml is provided in a region of 6.0 mm to 18.5 mm from the leading edge 3 of the head 1. The toe 6 to the heel 7 are arranged in a belt shape. Further, the volume of the Be-Cu alloy occupying the high specific gravity member in the head is 12.4 ml, and the weight thereof is 102.4.
g (1.004 N). Further, in a region below 6.0 mm from the leading edge 3 of the head 1,
Another high specific gravity member made of a tungsten alloy having a specific gravity of 17.3 g / ml is arranged in a belt shape from the toe 6 to the heel 7. Further, the volume of the tungsten alloy high specific gravity member occupying the head 1 is 4.63 ml, and the weight thereof is 8
It is 0.1 g (0.785 N). Therefore, the position of the center of gravity as the second member 5 of the present invention, which is a combination of these two high specific gravity members, is set at 12.5 mm from the leading edge 3 parallel to the face surface. The volume of the second member 5 occupying the head 1 is 17 ml, and its weight is 182.5 g (1.
789N).
【００２２】従って、前記のチタン合金からなる第１の
部材２とこのようにして組み合わされた第２の部材５と
が配置されたヘッドにおける全体の重心位置は、図２
（ｂ）にて、リーディングエッジ３からフェース面に平
行に１８．６ｍｍの位置となっている。この重心の位置
を図３の従来品と比較すると、重心移動量即ち低重心化
量は、５．８ｍｍとなり、本発明が要求する３ｍｍ以上
の移動量が達成されている。また、図２（ｂ）にて、第
１の部材２の重心と前記第２の部材５の重心との間でフ
ェース面９に平行に測られた距離である重心間距離
（Ｌ）は、３３．５−１２．５＝２１ｍｍとされ、ま
た、第２の部材５の重量比率（Ｒ）は、１８２．５／
（７４＋１８２．５）＝Ｏ．７１１即ち７１．１％とな
っており、この結果を、図１０にプロットしてみると、
同図内に二重丸で示した通り本発明の請求項１に記載す
る関係式に適合する関係が成立していることが判る。Therefore, the position of the center of gravity of the entire head in which the first member 2 made of the titanium alloy and the second member 5 combined in this way are arranged is shown in FIG.
In (b), the position is 18.6 mm from the leading edge 3 parallel to the face surface. Comparing the position of the center of gravity with the conventional product of FIG. 3, the amount of movement of the center of gravity, that is, the amount of reduction in the center of gravity, is 5.8 mm, and the amount of movement of 3 mm or more required by the present invention has been achieved. In FIG. 2B, a distance (L) between the centers of gravity, which is a distance measured in parallel with the face surface 9 between the center of gravity of the first member 2 and the center of gravity of the second member 5, is: 33.5-12.5 = 21 mm, and the weight ratio (R) of the second member 5 is 182.5 /
(74 + 182.5) = O. 711, that is, 71.1%. The results are plotted in FIG.
As shown by the double circles in the figure, it can be seen that a relationship that meets the relational expression described in claim 1 of the present invention is established.
【００２３】[0023]
【発明の効果】本発明に係わるアイアンクラブヘッドに
おいては、少なくとの２種以上の金属材料から構成され
たヘッドにおいて、比重の最も軽いものを第１の部材と
し、またこの第１の部材よりも比重の重いものを第２の
部材として、ヘッドの総重量に対する第２の部材の重量
比率Ｒ（％）と、第１の部材の重心と第２の部材の重心
間の距離とされる重心間距離Ｌ（ｍｍ）との間で、請求
項１に記載された式を満足する関係が設定されているの
で、打球の飛距離のバラツキを極めて少なくし、しかも
飛距離を最大限に増加出来る低重心化を達成する事が出
来る。また、重量の無駄な増加が防止出来ることもあり
スイングし易いアベレージゴルファーにやさしいクラブ
を提供する事が出来る。In the iron club head according to the present invention, the head having the lightest specific gravity is used as the first member in the head made of at least two or more metal materials. A material having a higher specific gravity is used as a second member, and the weight ratio R (%) of the second member to the total weight of the head, and the center of gravity is defined as the distance between the center of gravity of the first member and the center of gravity of the second member. Since the relation satisfying the expression described in claim 1 is set between the distance L (mm) and the distance L (mm), the variation in the flight distance of the hit ball can be extremely reduced, and the flight distance can be maximized. A low center of gravity can be achieved. In addition, it is possible to prevent a wasteful increase in weight, and to provide an average golfer-friendly club that is easy to swing.
【図１】実施例１の正面図及び側面図を示す。FIG. 1 shows a front view and a side view of a first embodiment.
【図２】実施例２の正面図及び側面図を示す。FIG. 2 shows a front view and a side view of a second embodiment.
【図３】従来例の正面図及び側面図を示す。FIG. 3 shows a front view and a side view of a conventional example.
【図４】比重の異なる２種部材での重心移動を説明する
図である。FIG. 4 is a diagram illustrating the movement of the center of gravity of two members having different specific gravities.
【図５】重心移動に重要な要素を調査する試験に用いた
クラブヘッドを示す。FIG. 5 shows a club head used in a test for investigating an important factor for shifting the center of gravity.
【図６】図５のヘッドに対する試験結果を示す表であ
る。FIG. 6 is a table showing test results for the head of FIG. 5;
【図７】図６の結果を図示したものである。FIG. 7 illustrates the results of FIG.
【図８】フェアウエイ上のボールを打撃する際の打点と
重心の位置を示す図である。FIG. 8 is a diagram showing positions of hit points and a center of gravity when a ball is hit on the fairway.
【図９】打球の飛距離と重心移動量との関係を示す図で
ある。FIG. 9 is a diagram illustrating a relationship between a flight distance of a hit ball and a moving amount of a center of gravity.
【図１０】重量比率（Ｒ）と重心間距離（Ｌ）との関係
を示す図である。FIG. 10 is a diagram showing a relationship between a weight ratio (R) and a distance between centers of gravity (L).
１ ヘッド ２ 第１の部材 ３ リーディングエッジ ４ ソール ５ 第２の部材 ６ トウ ７ ヒール ８ ホーゼル ９ フェース面 Reference Signs List 1 head 2 first member 3 leading edge 4 sole 5 second member 6 toe 7 heel 8 hosel 9 face surface
Claims (3)
アイアンクラブヘッドであって、ヘッド総重量に対して
５％以上の重量を有する同一材料から成る部材に関し
て、比重の最も軽い材料から成る部材を第１の部材と
し、第１の部材よりも比重の重い少なくとも一種以上の
部材を第2の部材として、ヘッド総重量に対する第2の部
材の重量比率Ｒ（％）と、第1の部材の重心と第2の部材
の重心との間をフェース面に平行に測定した距離とされ
る重心間距離Ｌ（ｍｍ）との関係が次式、 Ｌ>０．０１１３×Ｒ2−１．１３×Ｒ＋３６．８２ を満足することを特徴とするアイアンクラブヘッド。1. An iron club head made of at least two kinds of metal materials, wherein the member made of the same material having a weight of 5% or more with respect to the total weight of the head is made of a material made of a material having the lightest specific gravity. As a first member, at least one or more members having a specific gravity heavier than the first member as a second member, a weight ratio R (%) of the second member to the total weight of the head, and a center of gravity of the first member The relationship between the distance L (mm) between the center of gravity and the center of gravity of the second member measured in parallel with the face surface is as follows: L> 0.0113 × R 2 −1.13 × R + 36 .82, wherein the iron club head satisfies the following.
れていないことを特徴とする請求項１に記載のアイアン
クラブヘッド。2. The iron club head according to claim 1, wherein the back surface of the face surface is not formed with a cavity structure.
上となることを特徴とする請求項1又は２に記載のアイ
アンクラブヘッド。3. The iron club head according to claim 1, wherein the specific gravity of the second member is 10 g / ml or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000025849A JP2001212270A (en) | 2000-02-03 | 2000-02-03 | Iron club head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000025849A JP2001212270A (en) | 2000-02-03 | 2000-02-03 | Iron club head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001212270A true JP2001212270A (en) | 2001-08-07 |
Family
ID=18551647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000025849A Pending JP2001212270A (en) | 2000-02-03 | 2000-02-03 | Iron club head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001212270A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005028038A1 (en) * | 2003-09-22 | 2005-03-31 | The Yokohama Rubber Co., Ltd. | Golf club head and golf club |
| US7229362B2 (en) * | 2004-12-14 | 2007-06-12 | Nike, Inc. | Golf club head or other ball striking device with discrete regions of different density |
| JP2007151851A (en) * | 2005-12-06 | 2007-06-21 | Bridgestone Sports Co Ltd | Iron golf club head |
| US7670236B2 (en) | 2006-12-27 | 2010-03-02 | Bridgestone Sports Co., Ltd. | Club head for iron golf club |
| JP2010051618A (en) * | 2008-08-29 | 2010-03-11 | Globeride Inc | Golf club having iron head |
| US20100261540A1 (en) * | 2006-07-21 | 2010-10-14 | Cobra Golf, Incorporated | Multi-material golf club head |
| US8007373B2 (en) * | 2009-05-19 | 2011-08-30 | Cobra Golf, Inc. | Method of making golf clubs |
| US20120231897A1 (en) * | 2011-03-09 | 2012-09-13 | Hettinger Ronald K | Multi-material iron type golf club head |
| US20150111665A1 (en) * | 2011-03-09 | 2015-04-23 | Acushnet Company | Multi-material iron type golf club head |
| US9330406B2 (en) | 2009-05-19 | 2016-05-03 | Cobra Golf Incorporated | Method and system for sales of golf equipment |
| US9586104B2 (en) | 2006-07-21 | 2017-03-07 | Cobra Golf Incorporated | Multi-material golf club head |
| US9884231B2 (en) | 2011-03-09 | 2018-02-06 | Acushnet Company | Multi-material iron type golf club head |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09154986A (en) * | 1995-12-12 | 1997-06-17 | Sumitomo Rubber Ind Ltd | Iron club head |
-
2000
- 2000-02-03 JP JP2000025849A patent/JP2001212270A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09154986A (en) * | 1995-12-12 | 1997-06-17 | Sumitomo Rubber Ind Ltd | Iron club head |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005028038A1 (en) * | 2003-09-22 | 2005-03-31 | The Yokohama Rubber Co., Ltd. | Golf club head and golf club |
| CN102284180B (en) * | 2004-12-14 | 2013-07-17 | 耐克国际有限公司 | Golf club head or other ball striking device with discrete regions of different density |
| US7229362B2 (en) * | 2004-12-14 | 2007-06-12 | Nike, Inc. | Golf club head or other ball striking device with discrete regions of different density |
| US7481720B2 (en) * | 2004-12-14 | 2009-01-27 | Nike, Inc. | Golf club head or other ball striking device with discrete regions of different density |
| US7628713B2 (en) | 2004-12-14 | 2009-12-08 | Nike, Inc. | Golf club head or other ball striking device with discrete regions of different density |
| CN102284180A (en) * | 2004-12-14 | 2011-12-21 | 耐克国际有限公司 | Golf club head or other ball striking device with discrete regions of different density |
| JP2007151851A (en) * | 2005-12-06 | 2007-06-21 | Bridgestone Sports Co Ltd | Iron golf club head |
| US9586104B2 (en) | 2006-07-21 | 2017-03-07 | Cobra Golf Incorporated | Multi-material golf club head |
| US20100261540A1 (en) * | 2006-07-21 | 2010-10-14 | Cobra Golf, Incorporated | Multi-material golf club head |
| US8870682B2 (en) * | 2006-07-21 | 2014-10-28 | Cobra Golf Incorporated | Multi-material golf club head |
| US7670236B2 (en) | 2006-12-27 | 2010-03-02 | Bridgestone Sports Co., Ltd. | Club head for iron golf club |
| JP2010051618A (en) * | 2008-08-29 | 2010-03-11 | Globeride Inc | Golf club having iron head |
| US8323122B2 (en) * | 2009-05-19 | 2012-12-04 | Cobra Golf Incorporated | Method of making golf clubs |
| US8007373B2 (en) * | 2009-05-19 | 2011-08-30 | Cobra Golf, Inc. | Method of making golf clubs |
| US9330406B2 (en) | 2009-05-19 | 2016-05-03 | Cobra Golf Incorporated | Method and system for sales of golf equipment |
| US8454453B2 (en) * | 2011-03-09 | 2013-06-04 | Acushnet Company | Multi-material iron type golf club head |
| US20120231897A1 (en) * | 2011-03-09 | 2012-09-13 | Hettinger Ronald K | Multi-material iron type golf club head |
| US8870683B2 (en) | 2011-03-09 | 2014-10-28 | Acushnet Company | Multi-material iron type golf club head |
| US20150111665A1 (en) * | 2011-03-09 | 2015-04-23 | Acushnet Company | Multi-material iron type golf club head |
| US9504887B2 (en) | 2011-03-09 | 2016-11-29 | Acushnet Company | Multi-material iron type golf club head |
| US9616305B2 (en) | 2011-03-09 | 2017-04-11 | Acushnet Company | Method of forming multi-material iron type golf club head |
| US9884231B2 (en) | 2011-03-09 | 2018-02-06 | Acushnet Company | Multi-material iron type golf club head |
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