M274132 捌、新型說明： 【新型所屬之技術領域】 本創作係關於中空高爾夫球桿頭，特別是關於木桿或與 其近似形狀之高爾夫球桿頭。 【先前技術】 作為發球木桿及球道木桿等之木桿高爾夫球桿頭，廣泛 採用具有中空之殼體構造之金屬製者。一般之中空木桿高 爾夫球桿頭係具有用來擊球之面部、構成高爾夫球桿頭上 面部之圓頂部、構成高爾夫球桿頭底面部之底部、構成高 爾夫球桿頭之桿尖側、後側及跟側之側面部之側面部及插 鞘部。將桿柄插入該插鞘部中，藉由黏接劑等固定。另外， 最近被稱為多功能球桿之高爾夫球桿頭亦已在市場出售， 作為該多功能球桿桿頭之一種，與上述木桿高爾夫球桿頭 類似（即，具有面部、底部、側面、圓頂部及插鞘部）之 各種高爾夫球桿頭也在市場上出售。 作為構成該中空高爾夫球桿頭之金屬，雖採用鋁合金、 不銹鋼或鈦合金，但近年來，特別是鈦合金得到廣泛採用。 在日本專利特開2 0 0 2 - 1 1 1 2 2號公報及日本專利特開 2 0 0 2 - 2 2 4 2 4 9號公報中，記載有用锆系等非晶合金作面 部、用金屬作其他部分之中空高爾夫球桿頭。在此等公報 中，記載有用非晶合金作面部可使飛行距離增大。 一般藉由加大中空高爾夫球桿頭之體積，可使擊球點擴 大。當體積增大時，大多隨之而來的是高爾夫球桿頭重量 之增加。在此，為了防止此重量之增加，作為高爾夫球桿 5 312/發明說明書(補件)/93-08/93208987 M274132 頭之構成材料，考慮採用比重小於上述金屬之纖維強化樹 脂。 在日本專利特開2 0 0 1 - 3 4 0 4 9 9號公報中記載有面部及底 部為金屬製，其他之圓頂部、及桿尖側及跟側之側面部為 碳纖維強化熱硬化性樹脂（C F R P )製。當圓頂部為C F R P製 時，擊球時會使圓頂部產生較大之彎曲，使擊出角增大， 可使反彈係數加大。但在該高爾夫球桿頭中，由C F R P構成 之圓頂部及側面部與面部之周緣之結合部形成對接狀。在 該圓頂部及側面部與面部之結合部部份，擊球時會產生相 當大之應力，經反覆使用將有該結合部剝離之虞。 在美國專利6，4 7 1，6 0 4號中，記載有一高爾夫球桿頭， 其構成為由非晶合金構成之後方伸出體（return portion) 所構成之圓頂前緣部、底前緣部及兩側面前緣部、由非晶 合金製之面板構成面部之面，及與該後方伸出體相連接般 結合有由樹脂材料所構成之後半體（a f t e r b 〇 d y )，在底部 上配置有鋁板。 【專利文獻1】曰本專利特開2 0 0 2 - 111 2 2號公報 【專利文獻2】日本專利特開2 0 0 2 - 2 2 4 2 4 9號公報 【專利文獻3】曰本專利特開2 0 0 1 - 3 4 0 4 9 9號公報 【專利文獻4】美國專利6，4 7 1，6 0 4號 【新型内容】 (新型所欲解決之問題） 本創作之第1目的係在於提供一種容易設計重心位置之 高爾夫球桿頭。 6 312/發明說明書(補件)/93-08/93208987 M274132 上述美國專利6，4 7 1，6 Ο 4號之高爾夫球桿頭係因底部 鋁板直接連接至後方伸出體之底部，故擊球時底部側之 形較小。本創作之第2目的係在於提供一種擊球時底部 之變形大且反彈係數大之高爾夫球桿頭。 (解決問題之手段） 本創作（申請專利範圍第1項）之高爾夫球桿頭，具有 空殼體構造之高爾夫球桿頭，面部及與面部相連之前緣 係由非晶金屬材料構成之前面體所構成，在底部，為上 前面體之另一體、配置有在前後方向延伸之金屬製底板 其他殼體部分係為纖維強化樹脂製，其特徵為，上述前 體之重量為高爾夫球桿頭重量之20〜70%。 本創作（申請專利範圍第2項）之高爾夫球桿頭，具有 空殼體構造之高爾夫球桿頭，面部及與面部相連之前緣 係由非晶金屬材料構成之前面體所構成，在底部，為上 前面體之另一體、配置有在前後方向延伸之金屬製底板 其他殼體部分係為纖維強化樹脂製，其特徵為，上述前 體與上述金屬製底板在高爾夫球桿頭之前後方向上相隔 離，二者藉由纖維強化樹脂相結合。 (創作效果） 本創作（申請專利範圍第1項）之高爾夫球桿頭，前面 之重量作為2 0〜7 0 %。構成其他殼體部份之纖維強化樹 係因較金屬有著明顯之低比重，故可將前面體以外之殘 重量分配在底板或配置在底板後部之配重材料上。藉此 可使降低高爾夫球桿頭之重心位置或使重心移至後側等 312/發明說明書(補件)/93-08/93208987 之 變 側 中 部 述 面 中 部 述 ， 面 體 脂 餘 之 7 M274132 所期望之設計變得容易。 本創作（申請專利範圍第2項）之高爾夫球桿頭，由於擊 板間之纖維強化樹脂部分發 增加球之飛行距離。 板間之纖維強化樹脂部分 上方凹陷為佳。藉此，即使 烈碰撞時，也不會損傷纖維 定於前面體之前緣部内 樹脂間之固定。 進行貼片，可達到對面部之 部及底部，以使底部側及桿 寬度大於其等彼此間之中央 桿頭之慣性力矩增大。 300cc〜500cc左右，而重 之大型發球木桿桿頭。 之實施形態。圖1係實施形 圖2係從該高爾夫球桿頭之 圖，圖3係從前面體之後方 爾夫球桿頭之俯視圖、圖4 ( b ) 圖5(a)係沿圖4(a)之V-V 圖5(a)之B部分及C部分之 8 球時由非晶金屬製前面體與底 生變形，故反彈係數增大，而 在該非晶金屬製前面體與底 係以較底板及前面體之底面向 高爾夫球桿頭之底面與地面強 強化樹脂部分。 藉由將纖維強化樹脂重疊固 面，可強化前面體與纖維強化 藉由將面部以纖維強化樹脂 補強及抑制變形之作用。 在本創作中之前面體之圓頂 尖側之高爾夫球桿頭前後方向 部為佳。藉此，可使高爾夫球 本創作係非常適用於體積為 量必須限制在1 8 0〜2 1 0 g左右 【實施方式】 以下，參照附圖說明本創作 態之高爾夫球桿頭之立體圖， 前面體及底板前方觀察之立體 觀察之立體圖，圖4(a)係該高 係該高爾夫球桿頭之仰視圖， 線之剖面圖，圖5 ( b )、5 ( c )係 312/發明說明書(補件)/93-08/93208987 M274132 擴大圖，圖6係表示該高爾夫球桿頭之製造方法之剖面 圖，圖7係該高爾夫球桿頭之F R P體製造中所採用之預浸 潰片之說明圖。 該高爾夫球桿頭1係具有面部2、底部3、側面部4、圓 頂部5及插鞘部6之中空殼體構造之木桿高爾夫球桿頭。 面部2係擊球面，設有未圖示之刻線（s c 〇 r e 1 i n e )。底 部3係構成高爾夫球桿頭之底面部，側面部4係構成桿尖 側及跟側以及後面側之側面部。圓頂部5係構成高爾夫球 桿頭之上面部。插鞘部6中，插有桿柄且藉由黏接劑將桿 柄固定。 該高爾夫球桿頭1係由非晶金屬材料所構成之前面體 1 0、纖維強化樹脂體（以下稱為F R P體）2 0、金屬製之底板 3 0及配重材料4 0所構成。該前面體1 0之重量係為高爾夫 球桿頭重量之20〜70%，而以30〜60%特佳。 如圖2、圖3所示，前面體10係具有面部2、金屬底部 1 3、金屬側面部（桿尖）1 4、金屬圓頂部1 5、金屬側面部 (跟）1 6及插鞘部6。 金屬底部1 3係構成底部3之前緣部。金屬側面部1 4、 1 6係構成側面部4之前緣部。金屬圓頂部1 5係構成圓頂 部5之前緣部。金屬圓頂部1 5係與金屬側面部1 4 (桿尖） 及金屬側面部（跟）1 6相連接。金屬側面部1 4 (桿尖）及金屬 側面部（跟）1 6分別與金屬底部1 3相連接。該金屬側面部 1 4、1 6及金屬底部1 3係與面部2相連接。 該金屬底部1 3及金屬圓頂部1 5係在桿尖側及跟側中， 9 312/發明說明書(補件)/93-08/93208987 M274132 其前後寬度（與面部2垂直方向上之寬度）較大，此外之中 央部1 3 a、1 5 a係前後寬度較小。藉此，可使高爾夫球桿頭 之慣性力矩增大。又，在從桿尖側及跟側一直到該中央部 1 3 a、1 5 a，此前後寬度係逐漸變小。 前後寬度較小之該中央部1 3 a、1 5 a之桿尖•跟方向上 之長度係以在圓頂部上為前面體1 0之最大寬度之5 0〜8 5 %左右為佳，在底部上為前面體10之最大寬度之55〜80 %左右為佳。 金屬圓頂部1 5之該中央部1 5 a之前後寬度係為前面體 10之最大前後寬度之50〜95% ，以55〜70%左右特佳， 而金屬底部1 3之該中央部1 3 a前後寬度係以為前面體1 0 之最大前後寬度之50〜95% ，以55〜65%左右特佳。 如圖5所示，在底板30之前邊31與金屬底部13之間， 隔有平均為4〜12mm(以7〜9mm左右特佳）之間隔。二者之 間存在有FRP體20。在該金屬底部13與底板30之前邊31 間之F R P體2 0係從該金屬底部1 3及底板3 0之底面向上方 凹陷。該凹陷之平均深度係以0 . 7〜1 . 5 n] m左右為佳。因如 此般F R P體2 0呈凹陷，故可防止在對地誤擊時該凹陷部之 F R P體2 0與地面強烈碰撞而損傷。此外，如圖5 ( c )所示， 該凹陷部之F R P體2 0之底面係在高爾夫球桿頭之前後方向 上彎曲成拱形狀。 底板3 0之後邊3 4係雖位於高爾夫球桿頭1之最後部附 近，但位於較高爾夫球桿頭1最後端之略前方。 底板3 0係配置在底部1 3之桿尖*跟方向之中央部附近 10 312/發明說明書(補件)/93-08/93208987 M274132 一帶。如圖2所示，該底板3 0係呈略為四邊形，其具有與 該金屬底部1 3對峙之前邊3 1、從該前邊3 1之兩端向後延 伸之側邊3 2，3 3及後邊3 4。前邊3 1係較後邊3 4長，側邊 3 2 , 3 3係越向後方越彼此接近，因此，底板3 0係其俯視形 狀為略呈台形。底板3 0係依高爾夫球桿頭1之底面而為彎 曲。 底板30之前邊31之長度係以金屬底部13之上述中央 部13a之桿尖•跟方向長度之50〜75%為佳，而以60〜75 %左右特佳，後邊3 4之長度係以該前邊3 1長度之5 0〜8 0 %為佳，而以5 5〜7 5 %左右特佳。 底板3 0之前後方向之長度係以高爾夫球桿頭1之前後 方向之最大長度之65〜90%為佳，而以75〜85%左右特 佳。 該底板3 0係可由不錄鋼、：is、銅合金、鈦系金屬材料 等之金屬材料所構成。 在該底板3 0之後部上，朝向高爾夫球桿頭1内直立設 有圓筒部35，藉由螺合將配重材料40固定在該圓筒部35 之内孔中。 在該配重材料4 0之下端，設有凸緣部4 1，在上述圓筒 部3 5内孔之下緣，設有收容該凸緣部4 1之凹部3 5 a。 在圓筒部3 5之周圍，底板3 0係呈略為凹陷。 配重材料4 0係由較底板3 0之比重更大之金屬、例如鶴 或嫣合金所構成。配重材料4 0之比重係在1 0以上，而以 在1 0〜1 3左右特佳。配重材料4 0之中心位置係較高爾夫 11 312/發明說明書(補件)/93-08/93208987 M274132 球桿頭1之前後方向之中央位於後部側。 接著說明該高爾夫球桿頭之製造方法。 在製造該高爾夫球桿頭1中，採用金屬製之前面體10 及底板30與多片預浸潰片。與前面體10之FRP體20之結 合面係進行鼓風處理及熔融噴射處理等，以提高其與FRP 之結合性為佳。 圖7係表示於該實施形態中所採用之預浸潰片之俯視 圖。圖7 ( a )之預浸潰片5 1係將碳纖維織物浸潰在熱硬化 性合成樹脂中所製成，圖7 ( b )、7 ( c )、7 ( d )、7 ( e )之預浸 漬片5 2、5 3、5 4、6 0係將碳纖維拉伸成單一方向後，浸潰 在熱硬化性合成樹脂中所製成。預浸潰片5 1〜5 4係構成 F R P體2 0之下半側者，分別設有用以通過底板3 0之圓筒 部35之圓形開口 50。 預浸潰片51係直接疊合在底板3 0上，而為較該底板3 0 大一圈之略為台形者。 預浸潰片5 2、5 3、5 4係依此順序疊合在預浸潰片51上 者。為構成FRP體20之下半部分，此等預浸潰片52〜54 係形成為展開後之F R P體2 0下半部分之大小。此等預浸潰 片5 2〜5 4之兩側及後緣上，依指定之間隔切出有多個切口 5 5，預浸潰片5 2〜5 4之兩側及後緣以沿成形用金屬模之内 面容易彎曲般所構成。 預浸潰片5 2係其碳纖維於桿尖•跟方向配置。預浸潰 片5 3係以其碳纖維於相對於桿尖•跟方向與順時針回轉方 向成6 0 °斜交般予以配向。預浸潰片5 4係以其碳纖維於 12 312/發明說明書(補件)/93-08/93208987 M274132 相對於桿尖·跟方向與逆時針回轉方向成6 0 °斜交般予以 配向 。 預浸潰片6 0係用以構成F R P體2 0上面側者，並設有與 插鞘部6繫合之近似半圓形之缺口狀部6 1。 在製造高爾夫球桿頭1時，首先將底板3 0裝在具有高 爾夫球桿頭1之底部及側面部形狀之内腔面之金屬模中， 依預浸潰片5 1〜5 4之順序將之疊合。然後，經短時間加 熱，先使此等預浸潰片5 1〜5 4呈半硬化，如圖6所示，再 賦予F R P體2 0之底部2 2形狀，同時使與底板3 0形成一體。 關於預浸潰片6 0，也是將其裝在具有圓頂部形狀之内腔 面之金屬模中，經短時間加熱使其半硬化，如圖6所示， 賦予F R P體2 0之圓頂部2 1形狀。 其後將此等之預浸潰片6 0、裝有底板之預浸潰片5 1〜 54及金屬製前面體10裝入高爾夫球桿頭1成形用之金屬 模（圖示略）中。 此時，將由預浸潰片6 0所構成之圓頂部2 1之前緣疊合 於金屬圓頂部1 5下面（球桿頭内側面）。又，將由預浸潰片 51〜54所構成之底部22之前緣與金屬底部13上面（球桿 頭内側面）疊合。此外，如圖6所示，底部2 2之前緣係較 底板3 0之前邊3 1向前方伸出，底部2 2之後緣係較底板 3 0之後邊3 4向後方伸出。使圓頂部2 1之後緣相對於該底 部22之後緣之外面予以疊合。 接著，在加熱成形模具之同時，通過圓筒部3 5將空氣 等之氣體壓力導入成形模具内，將由半硬化之預浸潰片所 13 312/發明說明書(補件)/93-08/93208987 M274132 構成之圓頂部2 1及底部2 2壓入成形模具之内面，使預浸 潰片充分硬化，且圓頂部2 1及底面部2 2固定於前面體 1 0，並使圓頂部2 1與底部2 2結合。 在該成形時，預浸漬片中之合成樹脂之一部分將進入金 屬底部1 3及底板3 0之間，如圖5 ( c )所示般，F R P體2 0 形成為彎拱形彎曲之凹陷部。 其後進行脫模，將配重材料4 0螺合於圓筒部3 5内，藉 由去毛邊、塗裝等處理就作成高爾夫球桿頭1之製品。 如此般所構成之高爾夫球桿頭中，因包含延伸至前面體 1 0之部分與底板3 0間之部分完全變成F R P，故擊球時球桿 頭部容易變形，會產生強烈之反彈，同時，使重心下降。 特別是在該實施形態中，因F R P體2 0之圓頂部容易變形， 故使擊出角增大，而可增加飛行距離。 又，因FRP體20重疊固定於前面體10之金屬底部13、 金屬圓頂部15及金屬側面部14之内面上，故前面體10 與F R P體2 0之結合強度高。F R P體2 0之最前緣係以與面 部2抵接為佳。 在本創作中，作為非晶金屬材料，只要具有過冷卻液體 區域，形成非晶質相（非晶相），其組成係無特別限定而可 採用各種材料，例如以由一般式為M a X b ( a、b係以原子％ 為6 5 S a S 1 0 0，0 S b S 3 5 )中所示組成所構成之物質。 此處之上述Μ係為從Zr、V、Cr、Μη、Fe、Co、Ni、Cu、 Ti、 Mo、 W、 Ca、 Li、 Mg、 Si、 Al、 Pd、 Be 中所選擇一種 以上之金屬元素，而上述X係以從Y、L a、C e、S ηι、M d、 14 312/發明說明書(補件)/93-08/93208987 M274132M274132 新型 Description of new models: [Technical field to which new models belong] This creation is about hollow golf club heads, especially wood clubs or golf club heads with similar shapes. [Prior art] As a wood golf club head such as a driver wood and a fairway wood, a metal body having a hollow housing structure is widely used. Generally, a hollow wood golf club head has a face for hitting a ball, a round top constituting an upper face of the golf club head, a bottom part constituting a bottom face of the golf club head, a tip side and a rear side constituting a golf club head And the lateral part and hosel part of the lateral part of the heel. The stem is inserted into the hosel portion, and is fixed with an adhesive or the like. In addition, a golf club head, which has recently been called a multifunctional club, has also been sold on the market. As one of the multifunctional club heads, it is similar to the above-mentioned wood golf club head (that is, it has a face, bottom, and side , Round tops and hosel sections) are also sold on the market. As a metal constituting the hollow golf club head, although an aluminum alloy, stainless steel, or a titanium alloy is used, a titanium alloy has been widely used in recent years. Japanese Patent Laid-Open No. 2000-2-1 1 1 2 2 and Japanese Patent Laid-Open No. 2000-2 2 2 4 2 4 9 describe the use of zirconium-based amorphous alloys as faces and metals. Make other hollow golf club heads. In these publications, it is described that the use of an amorphous alloy as the face can increase the flight distance. Generally, by increasing the volume of the hollow golf club head, the hitting point can be enlarged. As the volume increases, most of it is accompanied by an increase in the weight of the golf club head. Here, in order to prevent this weight increase, as a constituent material of the golf club 5 312 / Invention Specification (Supplement) / 93-08 / 93208987 M274132 head, it is considered to use a fiber-reinforced resin having a specific gravity smaller than the above-mentioned metal. Japanese Patent Laid-Open No. 2000-1 3 4 0 4 9 9 describes that the face and bottom are made of metal, and the other round tops, and the sides of the tip and heel sides are made of carbon fiber reinforced thermosetting resin. (CFRP) system. When the dome is made of C F R P, the dome will have a large curvature when hitting the ball, which will increase the hit angle and increase the rebound coefficient. However, in this golf club head, the joint portion of the dome portion and the side portion constituted by C F R P and the peripheral edge of the face portion are in abutting shape. In the round top and the joint part between the side part and the face part, considerable stress is generated when hitting the ball, and the joint part may peel off after repeated use. In U.S. Patent No. 6,4 7,1,604, a golf club head is described, which is constituted by a front edge portion and a bottom edge portion of a dome made of an amorphous alloy and a rear portion. The edge part and the front edge part on both sides, the face constituting the face made of an amorphous alloy panel, and a rear half made of a resin material combined with the rear overhang is connected to the bottom part on the bottom part. Equipped with aluminum plate. [Patent Literature 1] Japanese Patent Laid-Open No. 2 0 0 2-111 2 2 [Patent Literature 2] Japanese Patent Laid-Open No. 2 0 2-2 2 4 2 4 9 [Patent Literature 3] Japanese Patent JP 2 0 0 1-3 4 0 4 9 9 [Patent Document 4] US Patent No. 6, 4 7 1, 6 0 4 [New Content] (Problems to be Solved by the New Type) The First Purpose of the Creation The purpose is to provide a golf club head that is easy to design the center of gravity position. 6 312 / Invention Specification (Supplement) / 93-08 / 93208987 M274132 The above-mentioned U.S. Patent No. 6,4 7 1,6 Ο 4 is the golf club head because the bottom aluminum plate is directly connected to the bottom of the rear protrusion, so The shape of the bottom side of the ball is smaller. The second object of this creation is to provide a golf club head with a large bottom deformation and a large rebound coefficient when hitting. (Means of Solving the Problem) The golf club head of this creation (the scope of application for patent) is a golf club head with an empty housing structure. The front face and the leading edge connected to the face are made of amorphous metal. It is composed of the other body of the upper front body at the bottom and a metal base plate extending in the front-rear direction. The other housing part is made of fiber reinforced resin. 20 to 70%. The golf club head of this creation (item 2 of the patent application) has a golf club head with an empty shell structure. The face and the leading edge connected to the face are composed of an amorphous metal material and a front face. At the bottom, It is another body of the upper front body, and a metal base plate extending in the front-rear direction is arranged. The other shell part is made of fiber-reinforced resin, characterized in that the front body and the metal base plate are in front and rear directions of the golf club head. Isolation, the two are combined by fiber reinforced resin. (Creative effect) The weight of the golf club head of this creation (the scope of patent application item 1) is 20% to 70%. The fiber-reinforced trees constituting other shell parts have a significantly lower specific gravity than metal, so the residual weight other than the front body can be distributed on the bottom plate or the weight material arranged at the rear of the bottom plate. This can reduce the center of gravity position of the golf club head or move the center of gravity to the rear side, etc. 312 / Invention Manual (Supplement) / 93-08 / 93208987 The desired design becomes easy. The golf club head of this creation (the scope of patent application for item 2), because the fiber-reinforced resin part between the pads, serves to increase the flight distance of the ball. It is preferable that the fiber-reinforced resin portion between the plates is recessed above. This prevents the fibers from being fixed to the resin in the front edge of the front body even during a severe collision. The patch can reach the part and bottom of the face, so that the moment of inertia of the bottom side and the width of the rod is larger than the central club heads between them. It is about 300cc to 500cc, and the heavy-duty driver head is large. Implementation form. Fig. 1 is an implementation view, Fig. 2 is a view from the golf club head, Fig. 3 is a top view of a golf club head behind the front body, Fig. 4 (b), and Fig. 5 (a) is along Fig. 4 (a) The VV of Fig. 5 (a), part B and part 8 of the C ball, are deformed by the front body and bottom of the amorphous metal, so the rebound coefficient is increased. The bottom of the front body faces the bottom of the golf club head and the ground strong-reinforced resin portion. By superposing the fiber-reinforced resin on the surface, the front body and the fiber can be strengthened. The fiber-reinforced resin is used to reinforce the face and suppress deformation. In this creation, the front and rear directions of the golf club head on the pointed side of the dome are better. With this, the golf book creation system can be very suitable for a volume whose volume must be limited to about 180 ~ 2 10 g. [Embodiment] Hereinafter, a perspective view of a golf club head of this creation state will be described with reference to the drawings. Figure 3 (a) is a bottom view of the golf club head and a cross-sectional view of the line, and Figures 5 (b), 5 (c) are 312 / Invention Specification ( (Supplement) / 93-08 / 93208987 M274132 Enlarged view, Figure 6 is a cross-sectional view showing the manufacturing method of the golf club head, and Figure 7 is a prepreg sheet used in the manufacturing of the FRP body of the golf club head. Illustrating. This golf club head 1 is a wood golf club head having a hollow casing structure having a face 2, a bottom 3, a side 4, a dome 5, and a hosel 6. The face 2 is a hitting surface and is provided with an engraved line (s c 〇 r e 1 i n e). The bottom portion 3 constitutes the bottom surface portion of the golf club head, and the side portion 4 constitutes the side portions on the tip side, heel side, and rear side. The dome 5 constitutes the upper face of the golf club head. The hosel portion 6 is inserted with a shaft, and the shaft is fixed by an adhesive. The golf club head 1 is composed of a front face body 10 made of an amorphous metal material, a fiber-reinforced resin body (hereinafter referred to as F R P body) 20, a metal bottom plate 30, and a weight material 40. The weight of the front body 10 is 20 to 70% of the weight of the golf club head, and 30 to 60% is particularly preferred. As shown in Figures 2 and 3, the front body 10 has a face 2, a metal bottom 1 3, a metal side portion (tip) 1 4, a metal dome 15, a metal side portion (heel) 16 and a hosel portion 6. The metal bottom 1 3 constitutes the front edge of the bottom 3. The metal side portions 1 4 and 16 constitute the front edge portion of the side portion 4. The metal dome portion 15 constitutes the front edge portion of the dome portion 5. The metal dome 15 is connected to the metal side portion 1 4 (tip) and the metal side portion (heel) 1 6. The metal side portion 1 4 (tip) and the metal side portion (heel) 16 are connected to the metal bottom portion 13 respectively. The metal side portions 14 and 16 and the metal bottom portion 1 3 are connected to the surface portion 2. The metal bottom 13 and the metal dome 15 are in the tip and heel sides, 9 312 / Invention Specification (Supplement) / 93-08 / 93208987 M274132 and its front and rear width (width perpendicular to the face 2) In addition, the central portions 1 3 a and 1 5 a are smaller in front and rear widths. This can increase the moment of inertia of the golf club head. In addition, from the tip and heel sides to the central portions 1 a and 15 a, the front and rear widths gradually decrease. The tip of the central part 1 3 a, 1 5 a with a small front-to-back width. The length in the heel direction is preferably about 50% to 85% of the maximum width of the front body 10 on the round top. The bottom is preferably about 55 to 80% of the maximum width of the front body 10. The front and back width of the central portion 15 of the metal dome 15 is 50 to 95% of the maximum front and rear width of the front body 10, and is preferably about 55 to 70%. The central portion of the metal bottom 1 3 is 1 3 a The front and rear width is considered to be 50 to 95% of the maximum front and back width of the front body 10, and about 55 to 65% is particularly preferred. As shown in FIG. 5, an interval between the front side 31 of the bottom plate 30 and the metal bottom 13 is 4 to 12 mm (preferably about 7 to 9 mm). There is an FRP body 20 between the two. The F R P body 2 0 between the metal bottom 13 and the front side 31 of the bottom plate 30 is recessed upward from the bottom surface of the metal bottom 13 and the bottom plate 30. The average depth of the depression is preferably about 0.7 to 1.5 n] m. Because of this, the F R P body 20 is indented, so that the F R P body 20 in the recessed portion can be prevented from being damaged by a strong collision with the ground when hitting the ground accidentally. In addition, as shown in FIG. 5 (c), the bottom surface of the F R P body 20 of the recessed portion is curved into an arch shape in the front-rear direction of the golf club head. The rear side 34 of the bottom plate 30 is located near the rear end of the golf club head 1, but is located slightly forward of the rear end of the golf club head 1. The bottom plate 3 0 is arranged near the center of the tip * 3 of the bottom 13 in the direction of heel 10 312 / Invention Manual (Supplement) / 93-08 / 93208987 M274132. As shown in FIG. 2, the bottom plate 3 0 is slightly quadrangular, and has a front edge 31 facing the metal bottom 13, side edges 3 2, 3 3, and a back edge 3 extending backward from both ends of the front edge 3 1. 4. The front side 3 1 is longer than the rear side 34, and the side 3 2, 3 3 are closer to each other as they move toward the rear. Therefore, the bottom plate 30 is slightly flat in plan shape. The bottom plate 3 0 is curved according to the bottom surface of the golf club head 1. The length of the front side 31 of the bottom plate 30 is preferably the tip of the central portion 13a of the metal bottom 13 and the length in the heel direction is preferably 50 to 75%, and particularly preferably about 60 to 75%. The length of the rear side 34 is 50 to 80% of the length of the front 31 is better, and about 5 to 75% is particularly good. The length in the front-rear direction of the sole plate 30 is preferably 65 to 90% of the maximum length in the front-rear direction of the golf club head 1, and approximately 75 to 85% is particularly preferable. The bottom plate 30 may be made of metal materials such as steel, is, copper alloy, and titanium-based metal materials. On the rear portion of the sole plate 30, a cylindrical portion 35 is provided upright toward the inside of the golf club head 1, and the weight material 40 is fixed in the inner hole of the cylindrical portion 35 by screwing. A flange portion 41 is provided at the lower end of the weight material 40, and a concave portion 3 5a for receiving the flange portion 41 is provided at the lower edge of the inner hole of the cylindrical portion 35. Around the cylindrical portion 35, the bottom plate 30 is slightly recessed. The weight material 40 is composed of a metal having a larger specific gravity than the bottom plate 30, such as a crane or a Yan alloy. The specific gravity of the weight material 40 is more than 10, and it is particularly preferable that it is about 10 to 13. The center position of the counterweight material 40 is located closer to the rear side than the center of the golf club head 1 in the front-rear direction of Golf 11 312 / Invention Manual (Supplement) / 93-08 / 93208987. Next, a method for manufacturing the golf club head will be described. In manufacturing this golf club head 1, a metal front face 10 and a bottom plate 30 and a plurality of prepregs are used. The bonding surface with the FRP body 20 of the front body 10 is subjected to a blast treatment and a melt-blasting treatment, etc., so as to improve the binding property with the FRP. Fig. 7 is a plan view showing a prepreg sheet used in this embodiment. Figure 7 (a) of the prepreg sheet 51 is made by impregnating a carbon fiber fabric in a thermosetting synthetic resin. Figures 7 (b), 7 (c), 7 (d), 7 (e) The prepregs 5 2, 5 3, 5 4, 6 0 are made by drawing carbon fibers into a single direction and immersing them in a thermosetting synthetic resin. The prepregs 5 1 to 5 4 form the lower half of the F R P body 20 and are provided with circular openings 50 for passing through the cylindrical portion 35 of the bottom plate 30, respectively. The prepreg sheet 51 is directly superimposed on the bottom plate 30, and is a slightly table-shaped one larger than the bottom plate 30. The prepreg sheets 5 2, 5 3, 5 4 are stacked on the prepreg sheet 51 in this order. To form the lower half of the FRP body 20, these pre-impregnated sheets 52 to 54 are formed to the size of the lower half of the F R P body 20 after deployment. A plurality of cutouts 5 5 are cut out on both sides and the trailing edge of these prepreg sheets 5 2 to 5 4, and the sides and the trailing edge of the prepreg sheets 5 2 to 5 4 are formed along the edges. The inner surface of the mold is easy to bend. The prepreg 5 2 series has carbon fibers arranged in the tip and heel directions. The prepreg 5 3 is aligned in such a way that its carbon fiber is obliquely intersected at a 60 ° angle with the clockwise direction of rotation relative to the tip and heel. The prepreg 5 4 is aligned with its carbon fiber at 12 312 / Invention Specification (Supplement) / 93-08 / 93208987 M274132 with respect to the tip and heel direction and the counterclockwise rotation direction at an oblique cross angle of 60 °. The prepreg sheet 60 is used to constitute the upper side of the F R P body 20 and is provided with an approximately semi-circular notch-shaped portion 61 which is connected to the hosel portion 6. When manufacturing the golf club head 1, the bottom plate 30 is first installed in a metal mold having an inner cavity surface having the shape of the bottom and side portions of the golf club head 1, and the pre-impregnated sheets 5 1 to 5 4 Of overlap. Then, after heating for a short time, the prepregs 5 1 to 5 4 are semi-hardened, as shown in FIG. 6, and then the shape of the bottom 22 of the FRP body 20 is given, while being integrated with the bottom plate 30. . Regarding the prepreg sheet 60, it is also installed in a metal mold having an inner cavity surface with a round top shape, and it is semi-hardened by heating for a short time. As shown in FIG. 6, a round top 2 is given to the FRP body 20 1 shape. Thereafter, these prepreg sheets 60, prepreg sheets 5 1 to 54 with a bottom plate, and a metal front body 10 are put into a metal mold (not shown) for forming the golf club head 1. At this time, the leading edge of the round top 21 composed of the prepreg sheet 60 is superimposed under the metal round top 15 (inner side of the club head). In addition, the leading edge of the bottom portion 22 composed of the prepreg sheets 51 to 54 and the upper surface of the metal bottom portion 13 (inner side surface of the club head) are overlapped. In addition, as shown in FIG. 6, the leading edge of the bottom 22 is projected forward from the front edge 31 of the bottom plate 30, and the trailing edge of the bottom 22 is projected rearward from the back edge 34 of the bottom plate 30. The rear edge of the dome 21 is overlapped with the outer surface of the rear edge of the bottom portion 22. Next, while heating the forming mold, a gas pressure such as air is introduced into the forming mold through the cylindrical portion 35, and a semi-hardened prepreg sheet 13 312 / Invention Specification (Supplement) / 93-08 / 93208987 M274132 The round top 2 1 and bottom 2 2 are pressed into the inner surface of the forming mold to fully harden the prepreg, and the round top 2 1 and the bottom surface 2 2 are fixed to the front body 10, and the round top 2 1 and Bottom 2 2 combined. During the forming, a part of the synthetic resin in the prepreg will enter between the metal bottom 13 and the bottom plate 30. As shown in FIG. 5 (c), the FRP body 20 is formed as a curved arched depression. . Thereafter, the mold is removed, and the weight material 40 is screwed into the cylindrical portion 35, and the product of the golf club head 1 is made by processing such as burring and painting. In the golf club head constituted in this way, since the portion including the portion extending to the front body 10 and the bottom plate 30 is completely changed to FRP, the club head is easily deformed when hitting, and a strong rebound will occur at the same time. To lower the center of gravity. Especially in this embodiment, since the round top of the F R P body 20 is easily deformed, the striking angle is increased, and the flight distance can be increased. In addition, the FRP body 20 is fixed to the inner surface of the metal bottom portion 13, the metal dome portion 15, and the metal side portion 14 of the front body 10 in an overlapping manner, so that the bonding strength between the front body 10 and the F R P body 20 is high. The foremost edge of the F R P body 20 is preferably in contact with the surface 2. In this work, as an amorphous metal material, as long as it has a supercooled liquid region to form an amorphous phase (amorphous phase), its composition is not particularly limited and various materials can be used. For example, the general formula is M a X b (a, b is a substance having a composition shown in atomic% of 65 S a S 1 0 0, 0 S b S 3 5). The above M is a metal selected from Zr, V, Cr, Mη, Fe, Co, Ni, Cu, Ti, Mo, W, Ca, Li, Mg, Si, Al, Pd, Be. Element, and the above X is from Y, La, Ce, Sm, Md, 14 312 / Invention Specification (Supplement) / 93-08 / 93208987 M274132
Hf、Nb、Ta、Ag、Pt、Au、Pd中所選擇一種以上之金屬元 素所構成者為佳。以Z r系非晶合金（合金中Z r之原子％之 比例為最大之合金）為佳。Z r類非晶合金係即使減小冷卻 速度，以能比較容易獲得非晶質組織。而非晶質合金係無 必要一定僅由純粹之非晶質合金之單相所構成不可，而以 含有因非晶質合金之製造條件或熱處理等而產生之微小結 晶相、準結晶相等之相為數v ο 1 %〜數十v ο 1 %者即可。 而非晶合金來係隨著其非結晶度增高而超過其彈性限 度時，容易發生龜裂。此處，以抑制擊球時變形為目的， 如圖8所示，以至面部2之内面為止配置有纖維強化樹脂 層為佳。纖維係除了碳纖維以外，也能採用玻璃纖維或芳 香族聚醯胺纖維之有機纖維等。 又，圖8之其他構成係與圖5 ( a )相同，同一符號係表示 同一部分。 非晶合金之非結晶度係至少在面部中為7 5〜1 0 0 % ，以 8 0〜9 8 %為佳。當結晶化度低於7 5 %時，有面部之強度不 足之虞。又，當非晶金屬中之一部分存在有結晶相時，變 得可塑性變形，於加工性或強度面亦優異者。 關於具備使用氧化錯系非晶金屬以試作本創作之高爾 夫球桿頭之高爾夫球桿，使用2層之高爾夫球，以4 0 m / s 之球速對面部之中心進行5 0 0次之打擊，進行其強度評估。 將面部之厚度作為3mm。然後，根據研磨加工是否容易 對非晶金屬之加工性進行評估。 其結果，當非結晶度為7 5 %以上（特別是8 0 % )時，可 15 312/發明說明書(補件)/93-08/93208987 M274132 認定球桿頭之非晶金屬強度充分。而當非結晶度為6 Ο %以 上時，加工性係十分優良，特別是在98%以下時，認定其 加工性非常優良。 【圖式簡單說明】 圖1係實施形態之高爾夫球桿頭之立體圖。 圖2係從圖1之高爾夫球桿頭之前面體及底板之前方觀 察之立體圖。 圖3係從圖1之高爾夫球桿頭之前面體後方觀察之立體 圖。 圖4 ( a )係高爾夫球桿頭之俯視圖、圖4 ( b )係高爾夫球 桿頭之仰視圖。 圖5 ( a )係沿圖4 ( a )之V - V線之剖面圖，圖5 ( b )、5 ( c ) 係圖5 ( a )之B部分及C部分之擴大圖。 圖6係表示本創作之高爾夫球桿頭製造方法之剖面圖。 圖7 ( a )〜（e )係本創作之高爾夫球桿頭之F R P體製造中 所採用預浸潰片之說明圖。 圖8係其他實施形態之高爾夫球桿頭之剖面圖。 (元件符號說明） 1 高爾夫球桿頭 2 面部 3 底部 4 側面部 5 圓頂部 6 插鞘部 16 312/發明說明書(補件)/93-08/93208987 M274132 10 前 面 體 13 金 屬 底 部 13a 中 央 部 14 金 屬 側 面 部 15 金 屬 圓 頂 部 15a 中 央 部 16 金 屬 側 面 部 17 金 屬 背 部 20 FRP ‘ 體 2 1 底 部 22 圓 頂 部 30 底 板 3 1 前 邊 32 側 邊 33 側 邊 34 後 邊 35 圓 筒 部 35a 凹 部 40 西己 重 材 料 4 1 凸 緣 部 50 開 V 5 ；1 〜5 5預 浸 潰 片 60 預 浸 潰 片 6 1 缺 口 狀 部 312/發明說明書(補件)/93-08/93208987One of Hf, Nb, Ta, Ag, Pt, Au, and Pd is preferably composed of one or more metal elements. Zr-based amorphous alloys (alloys in which the atomic% of Zr is the largest) are preferred. The Zr-based amorphous alloy system can obtain an amorphous structure relatively easily even if the cooling rate is reduced. It is not necessary for the amorphous alloy system to consist of only a single phase of a pure amorphous alloy, but to include a phase containing microcrystalline phases and quasi-crystalline phases generated by the manufacturing conditions or heat treatment of the amorphous alloy. Any number from v ο 1% to several tens v ο 1% is sufficient. On the other hand, when an amorphous alloy exceeds its elastic limit as its non-crystallinity increases, cracks are liable to occur. Here, for the purpose of suppressing deformation at the time of hitting the ball, it is preferable to arrange a fiber-reinforced resin layer up to the inner surface of the face 2 as shown in FIG. 8. In addition to carbon fibers, glass fibers or organic fibers such as aromatic polyamide fibers can also be used as the fiber type. The other components of FIG. 8 are the same as those of FIG. 5 (a), and the same reference numerals denote the same portions. The amorphousness of the amorphous alloy is at least 75% to 100% in the face, and preferably 80% to 98%. When the degree of crystallization is less than 75%, the strength of the face may be insufficient. In addition, when a crystalline phase is present in a part of the amorphous metal, it is plastically deformed and is excellent in workability and strength. Regarding a golf club equipped with a golf club head made of an oxide-based amorphous metal for a trial production, using a 2-layer golf ball, hitting the center of the face 500 times at a ball speed of 40 m / s, Perform its strength assessment. Let the thickness of the face be 3 mm. Then, the workability of the amorphous metal is evaluated based on whether the polishing process is easy. As a result, when the degree of non-crystallinity is 75% or more (especially 80%), it can be confirmed that the amorphous metal strength of the club head is sufficient. 15 312 / Instruction Manual (Supplement) / 93-08 / 93208987 M274132 On the other hand, when the non-crystallinity is 60% or more, the processability is very good, and especially when it is 98% or less, the processability is considered to be very good. [Brief Description of the Drawings] FIG. 1 is a perspective view of a golf club head according to an embodiment. FIG. 2 is a perspective view of the golf club head and the front face of the golf club of FIG. 1. FIG. FIG. 3 is a perspective view of the golf club head of FIG. 1 as viewed from the front and the rear of the body. Figure 4 (a) is a top view of the golf club head, and Figure 4 (b) is a bottom view of the golf club head. Figure 5 (a) is a sectional view taken along the line V-V of Figure 4 (a), and Figures 5 (b) and 5 (c) are enlarged views of Parts B and C of Figure 5 (a). FIG. 6 is a cross-sectional view showing a method for manufacturing a golf club head of the present invention. Figures 7 (a) ~ (e) are explanatory diagrams of the prepregs used in the manufacture of the golf club head's FRP body. Fig. 8 is a sectional view of a golf club head according to another embodiment. (Explanation of component symbols) 1 Golf club head 2 Face 3 Bottom 4 Side portion 5 Dome 6 Sheath portion 16 312 / Instruction manual (Supplement) / 93-08 / 93208987 M274132 10 Front body 13 Metal bottom 13a Center portion 14 Metal side part 15 Metal dome 15a Central part 16 Metal side part 17 Metal back 20 FRP 'Body 2 1 Bottom 22 Dome 30 Base plate 3 1 Front side 32 Side side 33 Side side 34 Back side 35 Cylinder part 35a Concave part 40 West weight Material 4 1 Flange part 50 open V 5; 1 to 5 5 Pre-impregnated sheet 60 Pre-impregnated sheet 6 1 Notched part 312 / Invention Manual (Supplement) / 93-08 / 93208987
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