JPH06142239A - Golf club head - Google Patents

Golf club head

Info

Publication number
JPH06142239A
JPH06142239A JP4315742A JP31574292A JPH06142239A JP H06142239 A JPH06142239 A JP H06142239A JP 4315742 A JP4315742 A JP 4315742A JP 31574292 A JP31574292 A JP 31574292A JP H06142239 A JPH06142239 A JP H06142239A
Authority
JP
Japan
Prior art keywords
young
layer
modulus
inner layer
face
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.)
Pending
Application number
JP4315742A
Other languages
Japanese (ja)
Inventor
Masashi Kobayashi
正志 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maruman Golf Co Ltd
Original Assignee
Maruman Golf Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maruman Golf Co Ltd filed Critical Maruman Golf Co Ltd
Priority to JP4315742A priority Critical patent/JPH06142239A/en
Publication of JPH06142239A publication Critical patent/JPH06142239A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0466Heads wood-type
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0416Heads having an impact surface provided by a face insert
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00Golf clubs
    • A63B53/04Heads
    • A63B53/0416Heads having an impact surface provided by a face insert
    • A63B53/042Heads having an impact surface provided by a face insert the face insert consisting of a material different from that of the head
    • A63B53/0425Heads having an impact surface provided by a face insert the face insert consisting of a material different from that of the head the face insert comprising two or more different materials
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00Characteristics of used materials
    • A63B2209/02Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Golf Clubs (AREA)

Abstract

PURPOSE:To enable a face body to elastically behave within the range of compressed deformation likely to appear due to collision with a ball, have rigidity approximately synchronized with the deformation of the ball and further to be sufficiently durable over a long term of use. CONSTITUTION:A recess 11a formed on the face section of a head body 11 is provided with a face body 13 having a double layer structure of an inner layer 14 made of a rubber type elastic body, and an outer layer 15 made of a fiber reinforced plastic with a Young's modulus larger than the inner layer 14. In this case, the external surface of the outer layer 15 is used as the face of a head. In addition, the value of the Young's modulus is changed, so that the outer layer 15 comes to have a smaller value near the Young's modulus of the inner layer 14 made of the rubber elastic body, according to an approach thereto.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はゴルフクラブヘッドに関
し、更に詳しくは、ボールの飛距離を伸ばすことができ
て耐久性に優れたフェース構造に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head, and more particularly to a face structure which can extend a flight distance of a ball and is excellent in durability.

【0002】[0002]

【従来の技術】打球時のゴルフボールの初速を高めてボ
ールの飛距離を増大させるためにはボールとクラブヘッ
ドとの反発係数をできるだけ大きくすることが重要であ
り、そのためにはヘッドのフェース部をボールの変形に
同調させて変形させることが望ましい。すなわち、ゴル
フボールの質量をmbとし、クラブヘツドの質量をmc
し、ボールの剛性をKbとし、ヘツドフェース部の有効
剛性をKcとしたとき、ヘツドとボールの衝突中におけ
る両者の変形の同調条件は次式で表すことができる。
2. Description of the Related Art In order to increase the initial velocity of a golf ball at the time of hitting the ball and increase the flight distance of the ball, it is important to make the coefficient of restitution between the ball and the club head as large as possible. It is desirable to deform in synchronization with the deformation of the ball. That is, when the mass of the golf ball is m b , the mass of the club head is m c , the rigidity of the ball is K b, and the effective rigidity of the head face portion is K c , the deformation of the head and the ball during collision The tuning condition of can be expressed by the following equation.

【数1】Kc=(mc/mb)Kb 一方、ヘツドのフェース部に設けたフェース体のヤング
係数をEとし、その有効厚みをtとし、衝突時にボール
と接触する面積をAとすると、
## EQU1 ## K c = (m c / m b ) K b On the other hand, E is the Young's modulus of the face body provided on the head face portion, t is its effective thickness, and A is the area in contact with the ball at the time of collision. Then,

【数2】E=(t/A)Kc であるから、上記同調条件を満足するためのフェース体
のヤング係数Eは次式を満足するものでなければならな
い。
## EQU2 ## Since E = (t / A) K c , the Young's modulus E of the face body for satisfying the above tuning conditions must satisfy the following equation.

【数3】E=(t/A)(mc/mb)Kb ## EQU3 ## E = (t / A) (m c / m b ) K b

【0003】このような同調変形を実現するためには、
ヘッドのフェース体がボールとの衝突による圧縮変形の
範囲内においてボールとほぼ同調し得る剛性を有すると
ともに、ボールとの衝突による圧縮変形の範囲内で弾性
挙動をすることが必要である。
In order to realize such tuning transformation,
It is necessary for the face body of the head to have rigidity that can be substantially synchronized with the ball within the range of compression deformation due to collision with the ball, and to have elastic behavior within the range of compression deformation due to collision with the ball.

【0004】このような同調条件を満たす材料としては
ゴム等の弾性体が考えられるが、例えばヘッドのフェー
ス体を厚みT=6.6 mmのゴム層にて形成し、このゴム
層を直接ボールと衝突させる構成とした場合、上記の同
調条件を満たすためには少なくともゴムのヤング係数E
が5.0×107〜8.0×107N/m2であることが必要にな
る。しかし、例えばブタジエンゴムの実際のヤング係数
Eは1.0×107〜2.0×107N/m2 程度であるため、ゴム
層のみでは上記の条件を満すものにはならない。また、
ボールを直接ゴム層に衝突させる構成とした場合、ゴム
層表面の耐摩耗性が低いため、フェース体に摩耗が生じ
易くなる。
An elastic body such as rubber is considered as a material satisfying such a tuning condition. For example, a face body of a head is formed by a rubber layer having a thickness T = 6.6 mm, and this rubber layer directly collides with a ball. In the case where the above-mentioned configuration is adopted, at least the Young's modulus E of the rubber is required to satisfy the above tuning condition.
Should be 5.0 × 10 7 to 8.0 × 10 7 N / m 2 . However, since the actual Young's modulus E of butadiene rubber is, for example, about 1.0 × 10 7 to 2.0 × 10 7 N / m 2 , the rubber layer alone does not satisfy the above conditions. Also,
When the ball is made to directly collide with the rubber layer, the wear resistance of the surface of the rubber layer is low, so that the face body is easily worn.

【0005】そこで、本出願人はヘッド本体のフェース
部に、ゴム状弾性体からなる内層と、この内層よりもヤ
ング係数の大きな繊維強化樹脂からなる外層との二層構
造をなすフェース体を固着してなるゴルフクラブヘッド
を提案した。係るゴルフクラブヘッドのフェース構造に
よれば、フェース体がボールとの衝突によって生じ得る
圧縮変形の範囲内で弾性挙動をし、且つ、ボールの変形
とほぼ同調する剛性を有するので、上述した同調条件を
ほぼ満足するものとなり、ボールの飛距離が増大する。
また、このフェース体は弾性体層を繊維強化樹脂層で保
護しているので、ゴム等の弾性体のみからなるフェース
体と比べて耐久性が向上する。
Therefore, the present applicant has fixed to the face portion of the head body a face body having a two-layer structure of an inner layer made of a rubber-like elastic body and an outer layer made of a fiber reinforced resin having a Young's modulus larger than that of the inner layer. I proposed a new golf club head. According to the face structure of the golf club head, the face body has elastic behavior within the range of compressive deformation that can occur due to collision with the ball, and has rigidity that is substantially in tune with the deformation of the ball. Is almost satisfied, and the flight distance of the ball is increased.
In addition, since the elastic body layer of this face body is protected by the fiber reinforced resin layer, the durability is improved as compared with the face body made of only an elastic body such as rubber.

【0006】[0006]

【発明が解決しようとする課題】しかし、一般的なエポ
キシ樹脂等および炭素繊維等を用いた繊維強化樹脂層と
ゴム等の弾性体層との界面には大きな剛性の変化が生じ
るため、そこに大きな応力集中が生じやすい。そしてこ
のような応力集中は界面剥離や繊維強化樹脂層内の層剥
離を誘発させる一因になると考えられる。
However, a large change in rigidity occurs at the interface between the fiber-reinforced resin layer using a general epoxy resin or carbon fiber or the like and the elastic body layer such as rubber. Large stress concentration is likely to occur. It is considered that such stress concentration is one of the causes for inducing interface delamination and delamination in the fiber reinforced resin layer.

【0007】したがって、本発明の目的は、フェース体
がボールとの衝突による圧縮変形の範囲内で弾性挙動を
し、且つ、ボールの変形とほぼ同調する剛性を有し、し
かもフェース体が長期の使用に十分耐え得る耐久性を有
するゴルフクラブヘッドを提供することにある。
Therefore, it is an object of the present invention that the face body behaves elastically within the range of compressive deformation due to the collision with the ball, and has a rigidity that is substantially in tune with the deformation of the ball, and the face body is long-term. It is an object of the present invention to provide a golf club head having durability that can be sufficiently used.

【0008】[0008]

【課題を解決するための手段】請求項1記載の発明は、
ヘッド本体のフェース部に、ゴム状弾性体からなる内層
と該ゴム状弾性体よりもヤング係数の大きい高剛性体か
らなる外層との2層構造をなすフェース体を固着し、外
層の表面をヘツドのフェース面としたゴルフクラブヘッ
ドにおいて、前記外層のヤング係数は、前記内層に近づ
くに従って小さくなり内層のヤング係数値に近づくよう
に、厚み方向に変化していることを特徴とする。
The invention according to claim 1 is
To the face portion of the head body, a face body having a two-layer structure of an inner layer made of a rubber-like elastic body and an outer layer made of a highly rigid body having a Young's modulus larger than that of the rubber-like elastic body is fixed, and the surface of the outer layer is headed. In the golf club head having the face surface as described above, the Young's modulus of the outer layer changes in the thickness direction such that the Young's modulus of the outer layer decreases toward the inner layer and approaches the Young's modulus value of the inner layer.

【0009】請求項2記載の発明は、上記構成のゴルフ
クラブヘッドにおいて、前記内層のヤング係数は、前記
外層に近づくに従って大きくなるように厚み方向に変化
していることを特徴とする。
According to a second aspect of the present invention, in the golf club head having the above-mentioned structure, the Young's modulus of the inner layer changes in the thickness direction so as to increase toward the outer layer.

【0010】請求項3記載の発明は、ヘッド本体のフェ
ース部に、ゴム状弾性体からなる内層の両面を該内層よ
りもヤング係数の大きい高剛性体からなる外層で挟んで
3層構造としたフェース体を固着し、一方の外層の表面
をヘツドのフェース面としたゴルフクラブヘッドにおい
て、前記両外層のヤング係数は、前記内層に近づくに従
って小さくなり内層のヤング係数値に近づくように、厚
み方向に変化していることを特徴とする。
According to a third aspect of the present invention, the head body has a three-layer structure in which a face portion of the head body is sandwiched on both sides of an inner layer made of a rubber-like elastic body with an outer layer made of a highly rigid body having a Young's modulus larger than that of the inner layer. In a golf club head having a face body fixed and one of the outer layers having a head face surface, the Young's modulus of the both outer layers becomes smaller toward the inner layer and approaches the Young's modulus value of the inner layer. It is characterized by changing to.

【0011】請求項4記載の発明は、上記各構成のゴル
フクラブヘッドにおいて、前記外層が繊維層を積層した
繊維強化樹脂からなることを特徴とする。
According to a fourth aspect of the present invention, in the golf club head having each of the above structures, the outer layer is made of a fiber-reinforced resin in which fiber layers are laminated.

【0012】[0012]

【作用】請求項1記載のゴルフクラブヘツドにおいて
は、ゴム状弾性体からなる内層はボールとの衝突による
圧縮変形の範囲内で弾性挙動をなし得る。また、ゴム状
弾性体からなる内層の表面を該弾性体よりもヤング係数
の大きい高剛性体からなる外層が覆っているので、弾性
体の内層はボールと直接衝突する場合に比べて広い範囲
で圧縮変形することになり、その結果、ゴム状弾性体自
体のヤング係数Eが1.0×107〜2.0×107N/m2 程度で
あっても、上記の同調条件を十分満足し得ることとな
る。したがって、ボールとの反発係数が大きくなり、ボ
ールの飛距離を伸ばすことができる。また、外層のヤン
グ係数はフェース体外面側から内層に近づくに従って小
さくなり内層のヤング係数値に近づくように厚み方向に
変化しているので、内層と外層との界面の剛性変化が小
さくなり、応力集中によるフェース体の破壊が生じ難い
ものとなる。したがって、フェース体の耐久性が高ま
る。
In the golf club head according to the present invention, the inner layer made of the rubber-like elastic material can exhibit elastic behavior within the range of compressive deformation due to collision with the ball. In addition, since the surface of the inner layer made of a rubber-like elastic body is covered with the outer layer made of a high-rigidity body having a Young's modulus larger than that of the elastic body, the inner layer of the elastic body has a wider range than in the case of directly colliding with the ball. This results in compressive deformation, and as a result, even if the Young's modulus E of the rubber-like elastic body itself is about 1.0 × 10 7 to 2.0 × 10 7 N / m 2 , the above tuning condition can be sufficiently satisfied. Become. Therefore, the coefficient of restitution with the ball is increased and the flight distance of the ball can be extended. In addition, the Young's modulus of the outer layer decreases from the outer side of the face toward the inner layer, and changes in the thickness direction so as to approach the Young's modulus value of the inner layer. The face body is less likely to be destroyed due to concentration. Therefore, the durability of the face body is enhanced.

【0013】請求項2記載のゴルフクラブヘッドにおい
ては、ゴム状弾性体からなる内層のヤング係数が高剛性
体からなる外層に近づくに従って大きくなるように厚み
方向に変化しているので、外層内のヤング係数変化を小
さく抑えつつ内層と外層との界面の剛性変化を小さく抑
えることができる。
In the golf club head according to the second aspect, the Young's modulus of the inner layer made of the rubber-like elastic body changes in the thickness direction so as to increase toward the outer layer made of the high rigidity body. It is possible to suppress the change in the rigidity of the interface between the inner layer and the outer layer to be small while suppressing the change in Young's modulus to be small.

【0014】請求項3記載のゴルフクラブヘッドにおい
ては、フェース面側の高剛性体外層は請求項1記載のフ
ェース体の外層と同様の働きをし、他側の高剛性体外層
はフェース体とヘッド本体との固着性を高める役割を果
たす。そしてゴム状弾性体からなる内層の両側の高剛性
体外層のヤング係数はそれぞれ内層に近づくに従って小
さくなり内層のヤング係数値に近づくように厚み方向に
変化しているので、内層と両外層との界面の剛性変化が
小さくなり、応力集中によるフェース体の破壊が生じ難
いものとなる。したがって、フェース体の耐久性が高ま
る。
In the golf club head of the third aspect, the outer layer of the high-rigidity body on the face side functions similarly to the outer layer of the face body of the first aspect, and the outer layer of the high-rigidity body on the other side functions as the face body. It plays the role of increasing the adhesion to the head body. The Young's modulus of the high-rigidity outer layer on both sides of the inner layer made of a rubber-like elastic body decreases as it approaches the inner layer, and changes in the thickness direction to approach the Young's modulus value of the inner layer. The change in the rigidity of the interface becomes small, and the face body is less likely to be broken due to stress concentration. Therefore, the durability of the face body is enhanced.

【0015】請求項4記載のゴルフクラブヘッドにおい
ては、外層が繊維層を積層した繊維強化樹脂からなるの
で、繊維の種類、配列密度、もしくは樹脂の材質等を層
毎に変化させることにより高剛性体外層のヤング係数を
容易に厚み方向に変化させることができる。
In the golf club head according to the present invention, since the outer layer is made of a fiber reinforced resin in which fiber layers are laminated, high rigidity can be obtained by changing the type of fibers, the arrangement density, or the resin material for each layer. The Young's modulus of the outer layer can be easily changed in the thickness direction.

【0016】[0016]

【実施例】以下、図面を参照して本発明の好ましい実施
例につき説明する。なお、図中同一構成部材には同一参
照符号を付して重複説明を省略する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. In the drawings, the same constituent members are designated by the same reference numerals, and duplicate description will be omitted.

【0017】図1から図4までは本発明の第1実施例を
示したものであり、図1はゴルフクラブヘッドの一部破
断斜視図、図2はヘツドの一部縦断面側面図、図3はヘ
ツドの一部横断面平面図、図4(a) はフェース体の層構
造を模式的に示す要部拡大断面図、図4(b) はフェース
体各層のヤング係数Eを模式的に示すグラフである。
FIGS. 1 to 4 show a first embodiment of the present invention. FIG. 1 is a partially cutaway perspective view of a golf club head, and FIG. 2 is a partially longitudinal sectional side view of a head. 3 is a partial horizontal cross-sectional plan view of the head, FIG. 4 (a) is an enlarged cross-sectional view of an essential part schematically showing the layer structure of the face body, and FIG. 4 (b) is a schematic diagram of Young's modulus E of each layer of the face body. It is a graph shown.

【0018】はじめに図1から図2までを参照すると、
クラブヘッド10はステンレス鋼、軽合金等の金属、若
しくは繊維強化樹脂、繊維強化金属等、若しくはセラミ
ックス等で作られた中空構造のヘッド本体11と、該ヘ
ッド本体11のヒール端に一体に連結されたネック部1
2とを備えており、このネック部12には図示しないク
ラブシャフトが接続されている。ヘッド本体11のフェ
ース部に形成された凹所11aには例えばブタジエン等
の熱硬化性ゴムからなるゴム状弾性体内層14と、この
弾性体内層14の表面に被着された該弾性体内層よりも
ヤング係数の大きい高剛性体外層15とを有するフェー
ス体13が凹所11aを埋めるように設けられており、
外層15の表面がヘツド10のフェース面をなしてい
る。このフェース体13はヘッド本体11のフェース部
の内底壁11bによりバックアップ(剛性支持)されて
いる。
First, referring to FIGS. 1 and 2,
The club head 10 is integrally connected to the heel end of the head body 11 having a hollow structure, which is made of metal such as stainless steel or light alloy, or fiber reinforced resin, fiber reinforced metal, or ceramics. Neck 1
2 and a club shaft (not shown) is connected to the neck portion 12. In the recess 11a formed in the face portion of the head body 11, for example, a rubber-like elastic inner layer 14 made of a thermosetting rubber such as butadiene, and an elastic inner layer adhered to the surface of the elastic inner layer 14 are formed. Also, a face body 13 having a high-rigidity outer layer 15 having a large Young's modulus is provided so as to fill the recess 11a,
The surface of the outer layer 15 constitutes the face surface of the head 10. The face body 13 is backed up (rigidly supported) by the inner bottom wall 11b of the face portion of the head body 11.

【0019】この実施例では、ゴム状弾性体内層14は
ブタジエンゴムからなり、高剛性体外層15は繊維層を
積層した繊維強化樹脂からなる。予め成形したフェース
体13をヘッド本体11の凹所11a内に挿入し、ゴム
状弾性体内層14を凹所11aの内底面に接着剤等で固
着することができるが、ヘッド本体11の凹所11a内
でゴム状弾性体内層14と高剛性体外層15とを一体成
形することによりフェース体13をヘッド本体11と一
体に形成してもよい。
In this embodiment, the rubber-like elastic inner layer 14 is made of butadiene rubber, and the high-rigidity outer layer 15 is made of fiber reinforced resin in which fiber layers are laminated. The preformed face body 13 can be inserted into the recess 11a of the head body 11, and the rubber-like elastic inner layer 14 can be fixed to the inner bottom surface of the recess 11a with an adhesive or the like. The face body 13 may be integrally formed with the head body 11 by integrally molding the rubber-like elastic inner layer 14 and the high-rigidity outer layer 15 in 11a.

【0020】説明の簡略化のため、図4(a) において
は、ゴム状弾性体内層14に被着される高剛性体外層1
5が繊維強化樹脂層15a〜15cの3層構造として示
されているが、実際はもっと多層に構成するのが好まし
い。同図(b) は同図(a) に示す各層のヤング係数Eを模
式的に示している。このように高剛性体外層15の各層
のヤング係数Eを厚み方向に変化させることにより、高
剛性体外層15のヤング係数をゴム状弾性体内層14に
近づくに従って小さくしゴム状弾性体内層14のヤング
係数値に近づくように厚み方向に変化させている。
For simplification of the description, in FIG. 4 (a), the high-rigidity outer layer 1 attached to the rubber-like elastic inner layer 14 is shown.
Although 5 is shown as a three-layer structure of the fiber reinforced resin layers 15a to 15c, it is actually preferable to have a multilayer structure. (B) of the figure schematically shows the Young's modulus E of each layer shown in the (a) of the figure. In this way, by changing the Young's modulus E of each layer of the high-rigidity outer layer 15 in the thickness direction, the Young's modulus of the high-rigidity outer layer 15 is reduced toward the rubber-like elastic inner layer 14 and the rubber-like elastic inner layer 14 is reduced. It is changed in the thickness direction so as to approach the Young's modulus value.

【0021】繊維強化樹脂からなる高剛性体外層15の
ヤング係数を厚み方向に変化させる方法としては、例え
ば、表層側の樹脂層には炭素繊維を用い、弾性体内層側
の樹脂層にはガラス繊維を用い、中間層の樹脂層には炭
素繊維とガラス繊維を混合率を変えて用いる方法のよう
に各層に用いる補強繊維をヤング係数の異なるものに変
える方法や、各層の樹脂材料をヤング係数の異なるもの
に変える方法、あるいはそれらを組み合わせる方法等が
ある。これらの方法によれば、高剛性体外層15のヤン
グ係数を容易に厚み方向に変化させることができる。
As a method of changing the Young's modulus of the high-rigidity outer layer 15 made of fiber reinforced resin in the thickness direction, for example, carbon fiber is used for the resin layer on the surface side and glass is used for the resin layer on the elastic body layer side. The method of changing the reinforcing fiber used for each layer to one having a different Young's modulus, such as the method of using fibers and changing the mixing ratio of carbon fiber and glass fiber for the resin layer of the intermediate layer, and the resin material of each layer has Young's modulus There is a method of changing to a different one, or a method of combining them. According to these methods, the Young's modulus of the high-rigidity outer layer 15 can be easily changed in the thickness direction.

【0022】上記のように構成したゴルフクラブヘッド
においては、フェース体13のゴム状弾性体内層14は
ボールとの衝突による圧縮変形の範囲内で弾性挙動をな
し得る。また、弾性体内層14の表面に該弾性体層より
もヤング係数の大きい高剛性体外層15が被着されてい
るので、弾性体内層14はボールと直接衝突する場合に
比べて広い範囲で圧縮変形することになり、その結果、
弾性体内層自体のヤング係数Eが1.0×107〜2.0×107
/m2 程度であっても、上記の同調条件を十分満足し得
ることとなる。したがって、ボールとの反発係数が大き
くなり、ボールの飛距離を伸ばすことができる。また、
弾性体内層14の表面に被着された高剛性体外層15の
ヤング係数はフェース体13の表面側から弾性体内層1
4に近づくに従って小さくなり弾性体内層14のヤング
係数値に近づくように厚み方向に変化しているので、弾
性体内層14と高剛性体外層15との界面の剛性変化が
小さくなり、応力集中によるフェース体13の破壊が生
じ難いものとなる。したがって、フェース体13の耐久
性が高まる。
In the golf club head constructed as described above, the rubber-like elastic inner layer 14 of the face body 13 can exhibit elastic behavior within the range of compressive deformation due to collision with the ball. Further, since the high-rigidity outer layer 15 having a Young's modulus larger than that of the elastic body layer is applied to the surface of the elastic body layer 14, the elastic body layer 14 is compressed in a wider range as compared with the case of directly colliding with the ball. It will be transformed, and as a result,
Young's modulus E of the elastic body layer itself is 1.0 × 10 7 to 2.0 × 10 7 N
Even if it is about / m 2 , the above tuning condition can be sufficiently satisfied. Therefore, the coefficient of restitution with the ball is increased and the flight distance of the ball can be extended. Also,
The Young's modulus of the high-rigidity outer layer 15 attached to the surface of the elastic inner layer 14 is calculated from the surface side of the face body 13 to the elastic inner layer 1
4, it becomes smaller as it approaches 4, and changes in the thickness direction so as to approach the Young's modulus value of the elastic body layer 14, so that the change in rigidity at the interface between the elastic body layer 14 and the highly rigid outer layer 15 becomes small, and the stress concentration causes The face body 13 is less likely to be destroyed. Therefore, the durability of the face body 13 is enhanced.

【0023】図5および図6は本発明の第2実施例を示
したものである。この実施例では、図5に示すように、
ヘッド本体11のフェース部の凹所11a内に設けられ
るフェース体13が、ゴム状弾性体内層14の両面を繊
維強化樹脂からなる高剛性体外層15,16で挟んで3
層構造をなしており、一方の外層15がヘツド10のフ
ェース面を形成している。説明の簡略化のため、図6
(a) においては、フェース体外面側の高剛性体外層15
は繊維強化樹脂層15a〜15cの3層構造として示さ
れており、フェース体内面側の高剛性体外層16は繊維
強化樹脂層16a,16bの2層構造として示されてい
るが、実際は両層15,16共にもっと多層に構成され
るのが好ましい。ゴム状弾性体内層14は高剛性体外層
16を介してヘッド本体11の凹所11の内底面に固着
されているので、ヘッド本体11とフェース体13との
固着強度が高まる。弾性体内層14および両高剛性体外
層15,16は上記第1実施例と同様の材料で構成する
ことができる。
5 and 6 show a second embodiment of the present invention. In this embodiment, as shown in FIG.
The face body 13 provided in the recess 11a of the face portion of the head body 11 sandwiches both sides of the rubber-like elastic inner layer 14 with the high-rigidity outer layers 15 and 16 made of fiber reinforced resin.
It has a layered structure, and one outer layer 15 forms the face surface of the head 10. For simplification of explanation, FIG.
In (a), the high-rigidity outer layer 15 on the outer surface side of the face body
Is shown as a three-layer structure of the fiber reinforced resin layers 15a to 15c, and the highly rigid outer layer 16 on the inner face side of the face is shown as a two-layer structure of the fiber reinforced resin layers 16a and 16b. It is preferable that both 15 and 16 are constructed in multiple layers. Since the rubber-like elastic inner layer 14 is fixed to the inner bottom surface of the recess 11 of the head main body 11 via the high-rigidity outer layer 16, the fixing strength between the head main body 11 and the face body 13 is increased. The elastic inner layer 14 and the both high-rigidity outer layers 15 and 16 can be made of the same material as in the first embodiment.

【0024】図6(b) に示すように、この第2実施例で
は、フェース体13の表面側の高剛性体外層15と同様
に、フェース体13の裏面側の高剛性体外層16のヤン
グ係数がゴム状弾性体内層14に近づくに従って小さく
なりゴム状弾性体層14のヤング係数値に近づくように
厚み方向に変化しているので、ゴム状弾性体内層14と
高剛性体外層16との界面の剛性変化を小さくすること
ができ、応力集中による層剥離や界面剥離を防止するこ
とができる。
As shown in FIG. 6B, in this second embodiment, as with the high-rigidity outer layer 15 on the front surface side of the face body 13, the Young's modulus of the high-rigidity outer layer 16 on the back surface side of the face body 13 is the same. The coefficient decreases as it approaches the rubber-like elastic body layer 14, and changes in the thickness direction so as to approach the Young's modulus value of the rubber-like elastic body layer 14, so that the rubber-like elastic body layer 14 and the high-rigidity outer layer 16 are separated from each other. It is possible to reduce the change in the rigidity of the interface and prevent layer separation and interface separation due to stress concentration.

【0025】図7は上述した第1実施例のゴム状弾性体
内層14の変形例を示したものである。このゴム状弾性
体内層14のヤング係数は高剛性体外層側で大きくフェ
ース体内面側で小さくなるように厚み方向に変化してい
る。このような厚み方向のヤング係数分布を得る方法と
しては、ゴム素材中に補強用の微粒子、短繊維等を混入
し、成形時に遠心力を利用してそれらの分布を厚み方向
に変化させる方法や、ゴム成形時にゴム素材の厚み方向
に硬化温度差をもたせる方法や、ゴム素材の比重差を利
用する方法等を用いることができる。
FIG. 7 shows a modification of the rubber-like elastic inner layer 14 of the first embodiment described above. The Young's modulus of the rubber-like elastic inner layer 14 changes in the thickness direction such that it is large on the high rigidity outer layer side and small on the face inner surface side. As a method for obtaining such a Young's modulus distribution in the thickness direction, a method of mixing reinforcing fine particles, short fibers, etc. in a rubber material and changing the distribution in the thickness direction by utilizing centrifugal force during molding, It is possible to use a method of making a difference in curing temperature in the thickness direction of the rubber material during rubber molding, a method of utilizing a difference in specific gravity of the rubber material, or the like.

【0026】上記のように厚み方向にヤング係数を変化
させたゴム状弾性体内層14を第1実施例のフェース体
13のゴム状弾性体内層14に適用すれば、高剛性体外
層15内の厚み方向のヤング係数変化を小さく抑えつつ
弾性体内層14と高剛性体外層15との界面の剛性変化
を小さくすることができる。
When the rubber-like elastic inner layer 14 having the Young's modulus changed in the thickness direction as described above is applied to the rubber-like elastic inner layer 14 of the face body 13 of the first embodiment, the inside of the high-rigidity outer layer 15 is formed. It is possible to reduce the change in the rigidity of the interface between the elastic inner layer 14 and the highly rigid outer layer 15 while suppressing the change in the Young's modulus in the thickness direction.

【0027】以上、図示実施例につき説明したが、本発
明は上記実施例の態様のみに限定されるものではなく、
特許請求の範囲に記載した発明の範囲内において各構成
要素に種々の変更を加えることができる。例えば、高剛
性体外層15はゴム状弾性体内層よりもヤング係数の大
きな材料であれば繊維強化樹脂以外の如何なる材料から
なっていてもよい。また、上記第2実施例の変形例とし
て、ゴム状弾性体内層のヤング係数をその厚み方向の中
央部分から両面に向かうに従って大きくしたものを用い
ることもできる。さらにフェース体13は高剛性体外層
15の外周縁を凹所11aに嵌合する金属リングで包囲
することにより、高剛性体外層15の外周縁を保護した
ものであってもよい。さらに、本発明はウツドクラブの
他、アイアンクラブ、パター等のヘツドに適用できるこ
とはいうまでもない。
Although the embodiments shown in the drawings have been described above, the present invention is not limited to the embodiments described above,
Various modifications can be made to each component within the scope of the invention described in the claims. For example, the high-rigidity outer layer 15 may be made of any material other than the fiber-reinforced resin as long as the material has a Young's modulus larger than that of the rubber-like elastic inner layer. Further, as a modified example of the second embodiment, it is possible to use one in which the Young's modulus of the rubber-like elastic body layer is increased from the central portion in the thickness direction toward both surfaces. Further, the face body 13 may be one in which the outer peripheral edge of the high-rigidity outer layer 15 is protected by surrounding the outer peripheral edge of the high-rigidity outer layer 15 with a metal ring fitted into the recess 11a. Further, it goes without saying that the present invention can be applied to heads such as iron clubs and putters as well as wood clubs.

【0028】[0028]

【発明の効果】以上の説明から明かなように、本発明に
よれば、フェース体がボールとの衝突によって生じ得る
圧縮変形の範囲内で弾性挙動をし、且つ、ボールの変形
とほぼ同調する剛性を有するものとなるので、衝突エネ
ルギーを有効利用してボールの飛距離を伸ばすことがで
き、しかもフェース体の耐久性に優れたゴルフクラブヘ
ッドを提供することができる。
As is apparent from the above description, according to the present invention, the face body behaves elastically within the range of compressive deformation that can be caused by the collision with the ball, and is substantially synchronized with the deformation of the ball. Since the golf club head has rigidity, the flight distance of the ball can be extended by effectively utilizing the collision energy, and a golf club head having excellent durability of the face body can be provided.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の第1実施例を示すゴルフクラブヘッド
の一部破断斜視図である。
FIG. 1 is a partially cutaway perspective view of a golf club head showing a first embodiment of the present invention.

【図2】図1に示すヘッドの一部縦断面側面図である。FIG. 2 is a partial vertical cross-sectional side view of the head shown in FIG.

【図3】図1に示すヘツドの一部横断面平面図である。FIG. 3 is a partial cross-sectional plan view of the head shown in FIG.

【図4】(a) は図1に示すヘッドのフェース体の層構造
を模式的に示す要部拡大断面図、(b) はその各層のヤン
グ係数を示すグラフである。
4A is an enlarged cross-sectional view of an essential part schematically showing the layer structure of the face body of the head shown in FIG. 1, and FIG. 4B is a graph showing the Young's modulus of each layer.

【図5】本発明の第2実施例を示すゴルフクラブヘッド
の一部縦断面側面図である。
FIG. 5 is a partial vertical cross-sectional side view of a golf club head showing a second embodiment of the present invention.

【図6】(a) は図5に示すヘッドのフェース体の層構造
を模式的に示す要部拡大断面図、(b) はその各層のヤン
グ係数を示すグラフである。
6A is an enlarged cross-sectional view of an essential part schematically showing the layer structure of the face body of the head shown in FIG. 5, and FIG. 6B is a graph showing the Young's modulus of each layer.

【図7】(a) 本発明の第1実施例のフェース体に用いる
ゴム状弾性体内層の変形例を示す要部断面図、(b) はそ
のヤング係数の変化分布を示すグラフである。
FIG. 7 (a) is a cross-sectional view of an essential part showing a modified example of the rubber-like elastic inner layer used in the face body of the first embodiment of the present invention, and FIG. 7 (b) is a graph showing change distribution of Young's modulus thereof.

【符号の説明】[Explanation of symbols]

11 ヘッド本体 11a 凹所 13 フェース体 14 ゴム状弾性体内層 15 高剛性体外層 16 高剛性体外層 11 Head Main Body 11a Recess 13 Face Body 14 Rubber Elastic Inner Layer 15 High Rigid Outer Layer 16 High Rigid Outer Layer

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 ヘッド本体のフェース部に、ゴム状弾性
体からなる内層と、該ゴム状弾性体よりもヤング係数の
大きい高剛性体からなる外層との2層構造をなすフェー
ス体を固着し、外層の表面をヘツドのフェース面とした
ゴルフクラブヘッドにおいて、前記外層のヤング係数
は、前記内層に近づくに従って小さくなり内層のヤング
係数値に近づくように、厚み方向に変化していることを
特徴とするゴルフクラブヘッド。
1. A face body having a two-layer structure comprising an inner layer made of a rubber-like elastic body and an outer layer made of a highly rigid body having a Young's modulus larger than that of the rubber-like elastic body is fixed to the face portion of the head body. In a golf club head in which the surface of the outer layer is a head face surface, the Young's modulus of the outer layer changes in the thickness direction so as to decrease toward the inner layer and approach the Young's modulus value of the inner layer. And a golf club head.
【請求項2】 前記内層のヤング係数は、前記外層に近
づくに従って大きくなるように厚み方向に変化している
ことを特徴とするゴルフクラブヘッド。
2. The golf club head, wherein the Young's modulus of the inner layer changes in the thickness direction so that the Young's modulus of the inner layer increases as the inner layer approaches the outer layer.
【請求項3】 ヘッド本体のフェース部に、ゴム状弾性
体からなる内層の両面を該内層よりもヤング係数の大き
い高剛性体からなる外層で挟んで3層構造としたフェー
ス体を固着し、一方の外層の表面をヘツドのフェース面
としたゴルフクラブヘッドにおいて、前記両外層のヤン
グ係数は、前記内層に近づくに従って小さくなり内層の
ヤング係数値に近づくように、厚み方向に変化している
ことを特徴とするゴルフクラブヘッド。
3. A face body having a three-layer structure is fixed to a face portion of a head body by sandwiching both surfaces of an inner layer made of a rubber-like elastic body with an outer layer made of a highly rigid body having a Young's modulus larger than that of the inner layer, In a golf club head in which the surface of one of the outer layers is a head face surface, the Young's moduli of the both outer layers are changed in the thickness direction so that the Young's moduli of the outer layers decrease as they approach the inner layer and approach the Young's modulus of the inner layer. A golf club head characterized by.
【請求項4】 前記外層が繊維層を積層した繊維強化樹
脂からなることを特徴とする請求項1から請求項3まで
のいずれか1つに記載のゴルフクラブヘッド。
4. The golf club head according to claim 1, wherein the outer layer is made of fiber reinforced resin in which fiber layers are laminated.
JP4315742A 1992-10-31 1992-10-31 Golf club head Pending JPH06142239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4315742A JPH06142239A (en) 1992-10-31 1992-10-31 Golf club head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4315742A JPH06142239A (en) 1992-10-31 1992-10-31 Golf club head

Publications (1)

Publication Number Publication Date
JPH06142239A true JPH06142239A (en) 1994-05-24

Family

ID=18068993

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4315742A Pending JPH06142239A (en) 1992-10-31 1992-10-31 Golf club head

Country Status (1)

Country Link
JP (1) JPH06142239A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5467983A (en) * 1994-08-23 1995-11-21 Chen; Archer C. C. Golf wooden club head
GB2363994A (en) * 2000-04-18 2002-01-16 Callaway Golf Co A compliant polymer face golf club head
WO2005028037A1 (en) * 2003-09-22 2005-03-31 The Yokohama Rubber Co., Ltd. Golf club head and golf club
WO2005028039A1 (en) * 2003-09-22 2005-03-31 The Yokohama Rubber Co., Ltd. Golf club head and golf club
US20120108357A1 (en) * 2010-11-02 2012-05-03 Takashi Nakamura Putter-type golf club head and putter-type golf club
US20130324301A1 (en) * 2012-05-31 2013-12-05 Nike, Inc. Golf Club Head or Other Ball Striking Device With Face Having Modulus Variance
KR20160061421A (en) * 2013-10-01 2016-05-31 카스턴 매뉴팩츄어링 코오포레이숀 Golf club heads with trench features and related methods

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5467983A (en) * 1994-08-23 1995-11-21 Chen; Archer C. C. Golf wooden club head
GB2363994A (en) * 2000-04-18 2002-01-16 Callaway Golf Co A compliant polymer face golf club head
GB2363994B (en) * 2000-04-18 2004-08-11 Callaway Golf Co A compliant polymer face golf club head
WO2005028037A1 (en) * 2003-09-22 2005-03-31 The Yokohama Rubber Co., Ltd. Golf club head and golf club
WO2005028039A1 (en) * 2003-09-22 2005-03-31 The Yokohama Rubber Co., Ltd. Golf club head and golf club
US8979668B2 (en) * 2010-11-02 2015-03-17 Sri Sports Limited Putter-type golf club head and putter-type golf club
US20120108357A1 (en) * 2010-11-02 2012-05-03 Takashi Nakamura Putter-type golf club head and putter-type golf club
US20130324301A1 (en) * 2012-05-31 2013-12-05 Nike, Inc. Golf Club Head or Other Ball Striking Device With Face Having Modulus Variance
US8882609B2 (en) * 2012-05-31 2014-11-11 Nike, Inc. Golf club head or other ball striking device with face having modulus variance
US10080935B2 (en) 2012-05-31 2018-09-25 Karsten Manufacturing Corporation Golf club head or other ball striking device with face having modulus variance
US10427013B2 (en) 2012-05-31 2019-10-01 Karsten Manufacturing Corporation Golf club head or other ball striking device with face having modulus variance
US20200001148A1 (en) * 2012-05-31 2020-01-02 Karsten Manufacturing Corporation Golf Club Head or Other Ball Striking Device with Face Having Modulus Variance
US11358036B2 (en) 2012-05-31 2022-06-14 Karsten Manufacturing Corporation Golf club head or other ball striking device with face having modulus variance
KR20160061421A (en) * 2013-10-01 2016-05-31 카스턴 매뉴팩츄어링 코오포레이숀 Golf club heads with trench features and related methods

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