TW200836796A - Golf club head - Google Patents

Golf club head Download PDF

Info

Publication number
TW200836796A
TW200836796A TW096107219A TW96107219A TW200836796A TW 200836796 A TW200836796 A TW 200836796A TW 096107219 A TW096107219 A TW 096107219A TW 96107219 A TW96107219 A TW 96107219A TW 200836796 A TW200836796 A TW 200836796A
Authority
TW
Taiwan
Prior art keywords
side shell
club head
front side
golf club
rear side
Prior art date
Application number
TW096107219A
Other languages
Chinese (zh)
Inventor
Chin-Chi Chen
Original Assignee
Chin-Chi Chen
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 Chin-Chi Chen filed Critical Chin-Chi Chen
Priority to TW096107219A priority Critical patent/TW200836796A/en
Priority to US11/723,643 priority patent/US20080214323A1/en
Publication of TW200836796A publication Critical patent/TW200836796A/en

Links

Classifications

    • 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
    • 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
    • A63B53/0408—Heads characterised by specific dimensions, e.g. thickness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A63B2209/023—Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
    • 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
    • A63B53/0416—Heads having an impact surface provided by a face insert
    • 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
    • A63B53/0437—Heads with special crown configurations
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations

Abstract

The present invention relates to a golf club head comprising a front side shell component and a rear side shell component which connects with each other to from a club head shell body. The front side shell component is made of metal with better elasticity such as titanium alloy or maraging steel or stainless steel and has a hitting surface and a ring like circular wall part extending backward from the hitting surface, presenting a cup shape as a whole. An external end of the wall part is provided with an inlay part. The distance of the wall part from the hitting surface to the external end is equal to or greater than 8 mm and the thickness of the wall part is equal to or smaller than 2 mm. The rear side shell component is made of a light metal with a small specific gravity, such as magnesium alloys or aluminum alloys and presents a deep cup shape as a whole. An inlay part is mounted to an edge of an opening end of the rear shell component, which is used to fit with the inlay part of the front side shell component. A neck part of the club head shell body is mounted to the front side shell component.

Description

200836796 九"發明說明： 【發明所屬之技術領域】 、本發明是和高爾夫桿頭有關，特別是關於-種使用鎂 或鋁等輕質合金作為殼體的高爾夫桿頭。 5【先前技術】 鎂或紹等輕質合金成型高爾夫桿頭殼體，具有質輕的 優點’容易設計出超大及低重心的桿頭，尤其是鎮合金具 有較佳的吸震性，做為桿頭殼體自有其優點，惟鎮合金^ ，度幸又差’不適合做為擊球面，因此擊球面必須選用彈性 10較佳的材料例如鈦合金或是不錯鋼製成，然而鎖或紹合金 的稼點低，因此鈦合金或是不鏽鋼的擊球面不能與鎮或銘 合金的殼體以硬焊接合，也無法以一般的焊接接合，因二 者的材料不同，焊接接合的強度不足’接合效果差。 15【發明内容】 t發明的主要目的在於提供一種高爾夫桿頭，其可以 克服則述鈦合金或不鏽鋼擊球面與鎂或鋁合金殼體的 問題。 為達成上揭目的，依據本發明所揭示的一種高爾夫桿 2〇頭，包含有··一前侧殼件與一後侧殼件，互相接合形成桿 頭殼體，其中：前侧殼件是由鈦合金或是麻時效鋼或是不 鏽鋼等具較佳彈性的金屬製成，具有一擊球面，並自擊球 面往後延伸出一圈環狀垣部，整體呈杯狀，在垣部的外端 设有一嵌接部，垣部自擊球面起至垣部外端之間的距離等 4 200836796 於或是大於8公釐，垣部的厚度等於或是小於2公釐；後 侧殼件是由鎂合金或是鉻合金等比重較輕的輕質金餍製 成，整體呈深杯狀，在其開口端緣設有一嵌接部，用以與 前侧殼件的嵌接部互相嵌接；該桿頭殼體的頸部是設於前 -5 侧殼件上。 【實施方式】 # 茲舉二實施例配合圖式說明如下： 如圖所示，本發明第一實施例的高爾夫桿頭（10)，是由 10 一前侧殼件(20)以及一後側殼件(30)所組成，其中： 該前侧殼件是由鈦合金或是不鏽鋼或是麻時效鋼等具 較佳彈性的金屬製成，具有一擊球面(21)，並自擊球面(21) 往後延伸出一圈環狀垣部(22)，整體呈杯狀，在垣部(22)的 外端没有一肷接部(23) ’該垣部(22)自擊球面(21)起至垣部 l5外端之間的距離W等於或大於8公釐，該垣部(22)的厚度 • D則等於或小於2公釐。本實施例的W為10公釐，D為 1.5公釐。 該後侧殼件(30)是由鎂合金或是銘合金等比重較輕的 輕質金屬製成，整體深杯狀，在其開口端緣設有一嵌接部 2〇 (31)，用以與前述前側殼件(20)的嵌接部(23)互相嵌接。本 實施例前侧殼件(2〇)的喪接部(23)呈一凸部，而後侧殼件(3〇) 的嵌接部(31)的外側壁面至凹槽槽壁之間的厚度S在3公釐 以下，本實施例S的厚度在1.5公釐。 如第四圖所示，該前側殼件(20)在底面中間部位往後延 5 200836796 伸一較長的底部(24)，該後側殼件(30)則對應底部(24)形狀 設有缺口或是凹槽，藉此形成桿頭殼體(10)底面的保護金屬 層。也就是說桿頭殼體(10)在底面中央位置可以是由前側殼 件的底部(24)單獨形成，或是後侧殼件(30)在此部位設有凹 5槽，而前側殼件的底部(24)則貼附在凹槽位置，形成上、下 二層結構。 桿頭殼體(10)的頸部（11)一體設於前側殼件(20)。 前侧殼件(20)與後側殼件(30)之間是以黏著劑例如環 氧樹脂黏著固定。 10 本發明特別限定前側殼件(20)以鈦合金或是不鏽鋼等 較具彈性的金屬製成，且其垣部的距離W必須在8公釐以 上，以10公釐較佳，其厚度D必須在2公釐以下，以1.2 至1.5公釐較佳，藉此，使垣部(22)更具有撓曲彈性，因此 當擊球面(21)承受強大的擊球應力時，垣部(22)能順勢產生 I5撓曲變形，如此在嵌接部(23)受的衝擊應力及變形量均可降 低，使後侧殼件(30)的嵌接部承受較小的應力，因此後側殼 件(30)的嵌接部壁厚s可適度的變薄，如此可以減重，避免 後側殼件(30)在桿頭殼體(10)頂蓋(13)部位產生呆厚呆重。 如第五圖所示，是本發明第二實施例的桿頭殼體(4〇) 20沿相同於第一圖中2-2剖線方向的結構剖視圖。圖中可見後 側殼件(50)是由一頂部構件(60)以及一底部構件(70)所構 成，其中頂部構件(60)是以比重在3以下之輕質材料例如工 種塑膠或是碳纖維補強樹脂或是鎂合金或鋁合金等輕質吸 震材料製成，而底部構件(70)則是以比重在4以上的耐磨材 6 200836796 料例如不鏽鋼或是鈦合金或是一般鐵材或是粉末冶金之鎢 鎳合金或是鎢銅合化等較重材料製成，具有耐磨及配重的 效果。 200836796 【圖式簡單說明】 第一圖是本發明第一實施例的外觀立體圖。 第二圖是沿第一圖中2-2剖線的結構剖視圖。 第三圖是第二圖中晝圈部份的放大圖。 5 第四圖是第一圖的底視圖。 第五圖是本發明第二實施例的結構剖視圖。 【主要元件符號說明】 高爾夫桿頭(10) 10 前側殼件(20) 後侧殼件(30) 頸部（11) 頂蓋(13) 擊球面(21) 15 垣部(22) 嵌接部、凸部(23) 底部(24) 嵌接部、凹槽(31) 桿頭殼體(40) 2〇 後侧殼件(50) 頂部構件(60) 底部構件(70) 8200836796 Nine "Invention: [Technical Field] The present invention relates to a golf club head, and more particularly to a golf club head using a lightweight alloy such as magnesium or aluminum as a casing. 5 [Prior Art] Magnesium or Shao and other light alloy molded golf club head shells have the advantages of light weight. It is easy to design a super large and low center of gravity. Especially the alloy has better shock absorption and acts as a rod. The head shell has its own advantages, but the town alloy ^, fortunately, is not suitable for the ball striking surface, so the ball striking surface must be made of elastic material 10, such as titanium alloy or good steel, but lock or The alloy of Shao alloy has a low point of view. Therefore, the impact surface of titanium alloy or stainless steel cannot be hard welded with the shell of Zhenzhen or Ming alloy, nor can it be joined by ordinary welding. The strength of welding joint is different due to the different materials. Insufficient 'joining effect is poor. 15 [Disclosed Summary] The main object of the invention is to provide a golf club head that overcomes the problems of the titanium alloy or stainless steel ball striking face and the magnesium or aluminum alloy casing. In order to achieve the above object, a golf club 2 boring head according to the present invention comprises a front side shell member and a rear side shell member which are mutually joined to form a head shell, wherein: the front side shell member is Made of titanium alloy or aging steel or stainless steel with better elasticity, it has a ball striking surface and a ring-shaped crotch extending from the ball striking face. The whole cup is in the shape of a cup. The outer end of the portion is provided with an engaging portion, and the distance between the crotch portion from the hitting surface to the outer end of the crotch portion is 4200836796 or greater than 8 mm, and the thickness of the crotch portion is equal to or less than 2 mm; The side shell member is made of a light-weight gold enamel such as a magnesium alloy or a chrome alloy, and has a deep cup shape as a whole, and has an engaging portion at the open end edge thereof for engaging with the front side shell member. The portions are intermeshing; the neck of the head housing is disposed on the front-5 side shell member. [Embodiment] The following is a description of the following embodiments: As shown in the figure, the golf club head (10) of the first embodiment of the present invention is composed of a front side shell member (20) and a rear side. The shell member (30) is composed of: the front side shell member is made of titanium alloy or stainless steel or a steel with better elasticity such as aging steel, has a ball striking surface (21), and is self-punting The surface (21) extends backwards with a ring-shaped crotch portion (22), which is generally cup-shaped, and has no splicing portion (23) at the outer end of the crotch portion (22). The distance W from the face (21) to the outer end of the crotch portion l5 is equal to or greater than 8 mm, and the thickness D of the crotch portion (22) is equal to or less than 2 mm. The W of this example was 10 mm, and D was 1.5 mm. The rear side shell member (30) is made of a light-weight metal such as a magnesium alloy or a Ming alloy, and has a deep cup shape as a whole, and has an engaging portion 2〇(31) at an open end edge thereof for Engaging with the engaging portion (23) of the front side case member (20). The splicing portion (23) of the front side shell member (2) of the embodiment has a convex portion, and the thickness of the outer side wall surface of the engaging portion (31) of the rear side shell member (3) to the groove groove wall S is 3 mm or less, and the thickness of this embodiment S is 1.5 mm. As shown in the fourth figure, the front side shell member (20) is extended to the rear portion of the bottom portion 5200836796 to extend a longer bottom portion (24), and the rear side shell member (30) is provided with a notch corresponding to the shape of the bottom portion (24). Or a groove, thereby forming a protective metal layer on the bottom surface of the head housing (10). That is, the head housing (10) may be formed separately at the center of the bottom surface by the bottom portion (24) of the front side shell member, or the rear side shell member (30) may be provided with a concave 5 groove at this portion, and the front side shell member The bottom (24) is attached to the groove to form an upper and lower two-layer structure. The neck portion (11) of the head housing (10) is integrally provided to the front side housing member (20). The front side case member (20) and the rear side case member (30) are fixed by an adhesive such as an epoxy resin. 10 The invention particularly defines that the front side shell member (20) is made of a relatively elastic metal such as titanium alloy or stainless steel, and the distance W of the crotch portion must be 8 mm or more, preferably 10 mm, and the thickness D thereof. It must be 2 mm or less, preferably 1.2 to 1.5 mm, whereby the crotch portion (22) is more flexible, so that when the ball striking surface (21) is subjected to strong impact stress, the crotch portion ( 22) The I5 flexural deformation can be generated according to the potential, so that the impact stress and the deformation amount received in the engaging portion (23) can be reduced, so that the engaging portion of the rear side shell member (30) is subjected to less stress, so the rear side The wall thickness s of the engaging portion of the shell member (30) can be appropriately thinned, so that the weight can be reduced, and the rear side shell member (30) can be prevented from being thick and heavy at the top cover (13) of the head shell (10). . As shown in the fifth figure, the head housing (20) of the second embodiment of the present invention is a cross-sectional view taken along the line 2-2 in the same manner as in the first drawing. It can be seen that the rear side shell member (50) is composed of a top member (60) and a bottom member (70), wherein the top member (60) is a lightweight material having a specific gravity of 3 or less, such as a plastic or carbon fiber. The reinforcing resin is made of a light shock absorbing material such as a magnesium alloy or an aluminum alloy, and the bottom member (70) is a wear resistant material having a specific gravity of 4 or more. 200836796 material such as stainless steel or titanium alloy or general iron or Made of powder metallurgy tungsten-nickel alloy or tungsten-copper alloy and other heavy materials, it has the effect of wear resistance and counterweight. 200836796 [Simplified description of the drawings] The first figure is an external perspective view of the first embodiment of the present invention. The second figure is a cross-sectional view of the structure taken along line 2-2 in the first figure. The third figure is an enlarged view of the portion of the circle in the second figure. 5 The fourth figure is the bottom view of the first figure. Fig. 5 is a cross-sectional view showing the structure of a second embodiment of the present invention. [Main component symbol description] Golf club head (10) 10 Front side shell member (20) Rear side shell member (30) Neck (11) Top cover (13) Ball striking face (21) 15 Crotch part (22) Embedding Part, protrusion (23) Bottom (24) Engagement, groove (31) Head housing (40) 2〇 Rear side housing (50) Top member (60) Bottom member (70) 8

Claims (1)

200836796 十、申請專利範圍： L 一種尚爾夫桿頭，包含有：一前側殼件與一後侧殼 件，互相接合形成桿頭殼體，其中： 。4側鈸件是由鈦合金或是麻時效鋼或是不鏽鋼等具較 仏彈[生=孟屬製成，具有一擊球面，並自擊球面往後延伸 5出-圈壤狀垣部，整體呈杯狀，在垣部的外端設有一後接 4 ’垣^自擊球面起至垣部外端之間的距離等於或是大於$ 公釐，垣部的厚度等於或是小於2公釐； 後侧;>又件疋由鎂合金或是鋁合金等比重較輕的輕質金 屬衣成’整體王珠杯狀，在其開口端緣設有一嵌接部，用 10以與前侧殼件的嵌接部互相嵌接； 該桿頭殼體的頸部是設於前側殼件上。 2·依據申請專利範圍第i項所述之高爾夫桿頭，其中 該垣部的距離在10公釐以上。 3·依據中請專利範圍第i項所述之高爾夫桿頭，其中 15該前侧殼件職接部呈凸部，而後側殼件的祕部呈凹 籲槽’且後側设件喪接部的外側壁面至凹槽槽壁之間的厚度 在3公釐以下。 4. 依據U利範圍第丨項所述之高爾夫桿頭，其中 該前侧殼件在底面中間部位往後延伸一較長的底部，該後 2〇側设件則對應底部形狀設有缺口或凹槽。 5. 依據申料鄉圍第丨項所述之高爾夫桿頭，其中 該後側殼件包含有-頂部構件以及一底部構件，該頂部構 件是以比重在3以下之輕質吸震材料製成，而底部構件是 以比重在4以上較重材料製成。 9 200836796 6. 依據申請專利範圍第5項所述之高爾夫桿頭，其中 該頂部構件是以工程塑膠或是纖雉補強樹脂或是鎂合金或 是鋁合金製成。 7. 依據申請專利範圍第5項所述之高爾夫桿頭，其中 5 該底部構件是以鈦合金或是不鏽鋼或是一般鐵材或是粉末 冶金之鎢鎳合金或是鎢銅合金製成。200836796 X. Patent application scope: L A Shangerfu club head, comprising: a front side shell member and a rear side shell member, mutually joined to form a head shell, wherein: 4 side 钹 是 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛 钛The whole part is cup-shaped, with a rear end 4 '垣 at the outer end of the crotch. The distance from the ball striking surface to the outer end of the crotch is equal to or greater than $mm, and the thickness of the crotch is equal to or Less than 2 mm; rear side; > further 疋 is made of magnesium alloy or aluminum alloy and other light weight light metal clothing into an 'integral king bead cup shape, with an inset at its open end, with 10 And engaging with the engaging portion of the front side shell member; the neck portion of the head shell is disposed on the front side shell member. 2. The golf club head according to item i of the patent application, wherein the distance of the crotch portion is more than 10 mm. 3. According to the golf club head according to item i of the patent application, wherein the front side shell member has a convex portion, and the rear side shell member has a concave portion and the rear side member is lost. The thickness between the outer side wall surface of the portion and the groove groove wall is less than 3 mm. 4. The golf club head according to the above paragraph, wherein the front side shell member extends rearwardly from the middle portion of the bottom surface to a longer bottom portion, and the rear side member has a notch corresponding to the bottom shape or Groove. 5. The golf club head according to the above-mentioned item, wherein the rear side shell member comprises a top member and a bottom member, the top member being made of a lightweight shock absorbing material having a specific gravity of 3 or less. The bottom member is made of a heavier material having a specific gravity of 4 or more. 9 200836796 6. The golf club head according to claim 5, wherein the top member is made of engineering plastic or fiber reinforced resin or magnesium alloy or aluminum alloy. 7. The golf club head according to claim 5, wherein the bottom member is made of titanium alloy or stainless steel or general iron or powder metallurgy tungsten-nickel alloy or tungsten-copper alloy. 1010
TW096107219A 2007-03-02 2007-03-02 Golf club head TW200836796A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
TW096107219A TW200836796A (en) 2007-03-02 2007-03-02 Golf club head
US11/723,643 US20080214323A1 (en) 2007-03-02 2007-03-21 Golf club head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW096107219A TW200836796A (en) 2007-03-02 2007-03-02 Golf club head

Publications (1)

Publication Number Publication Date
TW200836796A true TW200836796A (en) 2008-09-16

Family

ID=39733517

Family Applications (1)

Application Number Title Priority Date Filing Date
TW096107219A TW200836796A (en) 2007-03-02 2007-03-02 Golf club head

Country Status (2)

Country Link
US (1) US20080214323A1 (en)
TW (1) TW200836796A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI742953B (en) * 2020-12-07 2021-10-11 明安國際企業股份有限公司 Golf club head

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW200819172A (en) * 2006-10-25 2008-05-01 Chen Ching Chi Golf club head
TW200819174A (en) * 2006-10-30 2008-05-01 Chen Ching Chi Golf club head
US20090098949A1 (en) * 2007-03-21 2009-04-16 Chen Archer C C Golf club head
US8277336B2 (en) * 2008-05-01 2012-10-02 Sri Sports Limited Golf club head and method for manufacturing the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0798076B2 (en) * 1990-09-27 1995-10-25 ヤマハ株式会社 Golf club head
US5460371A (en) * 1993-05-19 1995-10-24 Kabushiki Kaisha Endo Seisakusho Golf club wood head
US5494281A (en) * 1995-01-20 1996-02-27 Chen; Archer C. C. Golf club head
KR100596960B1 (en) * 2001-12-28 2006-07-07 요코하마 고무 가부시키가이샤 Hollow golf club head
TW590028U (en) * 2002-08-05 2004-06-01 Ching-Chi Chen Wood golf club head
US7226366B2 (en) * 2004-06-01 2007-06-05 Callaway Golf Company Golf club head with gasket
US7066835B2 (en) * 2004-09-10 2006-06-27 Callaway Golf Company Multiple material golf club head
US20070099721A1 (en) * 2005-11-02 2007-05-03 Chen Archer C Golf club head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI742953B (en) * 2020-12-07 2021-10-11 明安國際企業股份有限公司 Golf club head

Also Published As

Publication number Publication date
US20080214323A1 (en) 2008-09-04

Similar Documents

Publication Publication Date Title
JP4617238B2 (en) Golf club head
JP4642091B2 (en) Golf club head having a non-metallic rear body
JP2005131280A (en) Golf club head structure
US20090098949A1 (en) Golf club head
TW200819172A (en) Golf club head
AU2005220185A1 (en) Golf club head
KR20060049465A (en) Golf club head
JP2012147950A (en) Iron golf club head
JP2004329544A (en) Golf club head
JP3762906B2 (en) Golf club head
TW200836796A (en) Golf club head
TWM261255U (en) Golf club head
JP4097666B2 (en) Golf club head
TW200819174A (en) Golf club head
TWI308500B (en)
JP3124540U (en) Golf club head
JP5156994B2 (en) Iron golf club head and iron golf club
JP4755944B2 (en) Golf club
JP4528281B2 (en) Golf club head
JP2006122544A (en) Iron golf club head
JP2008131970A (en) Golf club head
JP2891139B2 (en) Golf iron clubs
JP3124726U (en) Golf club head
CN101176820A (en) Golf club head
JP2007006984A (en) Golf club head structure of low centroid