M262233 捌、新型說明： 【新型所屬之技術領域】 本創作係關於高爾夫中使用的推桿桿頭，特別是關於推 桿時擊打高爾夫球時衝擊吸收性好的推桿桿頭。 【先前技術】 日本專利特開2 0 0 1 — 1 9 0 7 2 1號公報中記載，為了吸收 用推桿桿頭擊球時的衝擊，並提高擊球感，在推桿桿頭的 擊球面上設置聚胺基曱酸酯樹脂等的樹脂材。 (專利文獻1 )日本專利特開平2 0 0 1 - 1 9 0 7 2 1號公報 【新型内容】 (新型所欲解決之問題） 在上述日本專利特開2 0 0 1 — 1 9 0 7 2 1號公報的推桿桿頭 中，因為樹脂材在擊球面上露出，故樹脂材易受到傷害， 财久性差。 本創作之目的在於提供一種擊球時的衝擊吸收性優 異，而且耐久性亦優的推桿桿頭。 (解決問題之手段） 本創作的推桿桿頭具備：由低比重金屬製成，前面為擊 球面的前半體；由高比重金屬製成，安裝於該前半體的後 側的後半體；以及在該前半體的内部沿著該擊球面配置的 由橡膠或合成樹脂製成的插入構件。 (創作效果） 在這種本創作的推桿桿頭中，擊球時的衝擊被前半體内 部的橡膠或合成樹脂製的插入構件所吸收。 5 326\專利說明書(補件)\93-09\93208951 M262233 由於此插入構件沿著擊球面配置，所以容易吸收衝擊。 在本創作中，最好是在前半體的背面設有凹處，前述插 入構件配置於該凹處内，而且該插入構件透過該後半體被 按壓。在如此構成之情況，因為插入構件被強力壓住並緊 密接觸於前半體，故在前半體上產生的衝擊確實地傳送到 插入構件，可被充分吸收。 在本創作中，推桿桿頭亦可為如下構造：前半體在桿尖· 跟部方向上延伸，該後半體由從該前半體的桿尖側連續到 跟側且為向前半體的後方伸出的形狀外周棒狀體、以及從 該前半體的桿尖·跟部方向的中央向後方伸出且後端連接 於該外周棒狀體之中央棒狀體一體構成，在該中央棒狀體 的前端，設有大小為可嵌合於前述凹處的蓋體，以該蓋體 按壓前述插入構件的方式，使該後半體與該前半體連接。 根據此構成，推桿桿頭的重心周圍的慣性力矩變大，推桿 桿頭的擊球區域加寬。此外，經由蓋體，充分地將插入構 件壓在前半體上。 此情況中，最好是凹處由：從前半體的背面凹陷的比較 大的入口部；設在該入口部的裏側的比較小的裏部；以及 在該入口部與裏部之間形成之與前述擊球面大致平行的高 度差面所構成，且前述插入構件配置於該裏部内，前述蓋 體接觸於前述高度差面。如此，蓋體配置於裏部，壓住它 的蓋體接觸於高度差面，藉此，插入構件以規定的比率被 壓縮。藉此，設計的衝擊吸收特性被確實地顯現。 【實施方式】 6 326\專利說明書(補件)\93-09\93208951 M262233 以下參照圖1〜4，就本創作的實施形態詳細地進行說 明。圖1係實施形態之推桿桿頭的分解立體圖，圖2係該 推桿桿頭的立體圖，圖3係該推桿桿頭的仰視圖，圖4係 圖3的I V — I V線剖視圖。 該推桿桿頭1係由：由低比重金屬材料構成的前半體 1 0、由高比重金屬材料構成的後半體2 0、以及由橡膠或合 成樹脂構成的插入構件3 0而構成。 前半體1 0是在連接其桿尖（圖2的左端）與跟部（圖2 的右端）的桿尖·跟部方向上延伸的大致長方體形狀者。 另外，該前半體1 0的底面1 0 s係成為桿尖·跟部方向的中 央側稍微向下鼓出的圓弧狀。前半體1 0的前表面是用來擊 球的擊球面1 0 a。 在該前半體1 0的背面，在其桿尖·跟部方向的中間附近 設有凹處1 1。該凹處1 1係由：入口部1 1 a、從該入口部 1 1 a的裏側（擊球面1 0 a側）向擊球面1 0 a側凹陷的裏部 1 1 b、形成於該入口部1 1 a與裏部1 1 b的邊界部的高度差面 1 1 c所構成。入口部1 1 a是在桿尖·跟部方向上延伸，係 為朝前半體1 0的背面與底面開放的缺口狀。裏部11 b係呈 從入口部11 a的擊球面1 0 a側之面凹陷的溝狀。該裏部11 b 於桿尖·跟部方向上延伸。裏部1 1 b比入口部1 1 a稍小， 跨越裏部lib的整個周圍存在有高度差面11c。 在前半體1 0的桿尖·跟部方向的兩端側的背面，分別設 有亦朝底面1 0 s開放的缺口部1 2。以連通該缺口部1 2的 擊球面1 0 a側與擊球面1 0 a的方式，貫穿設置螺栓1 4的插 7 326\專利說明書(補件)\93-09\93208951 M262233 通孔1 3。該插通孔1 3與後述的插通孔2 3 a同樣，擊球面 1 0 a側為大直徑部，背面側為小直徑部，螺栓1 4的頭部係 配置於大直徑部内。 在前半體1 0的上表面中，跟側貫穿設置桿軸插入孔1 5。 後半體2 0包括：半圓弧形狀的外周棒狀體21、連接於 該外周棒狀體2 1的延伸方向的中央部且成為一體的中央 棒狀體2 2、靠螺栓2 4安裝於該中央棒狀體2 2的前端面的 蓋體2 3。該中央棒狀體2 2的後部的底面係向後半體2 0的 最後尾部成為坡度的斜面2 0 a (圖4 )。 外周棒狀體2 1的兩端呈嵌合於前述缺口部1 2的形狀和 大小，在該兩端面上設有與前述插通孔1 3成為同軸狀的内 螺紋孔（未圖示）。使外周棒狀體21的兩端嵌合於缺口部 1 2，經由把螺栓1 4旋入該内螺紋孔，使前半體1 0與後半 體2 0連接。 蓋體2 3係嵌合於入口部1 1 a的大小。如圖4所示，通 過設在蓋體2 3的插通孔2 3 a，把螺栓2 4鎖入設在中央棒 狀體2 2的前端面的内螺紋孔2 2 a，藉此，該蓋體2 3被固 定於中央棒狀體2 2。 插入構件3 0具有與前述裏部1 1 b大致相等的縱橫尺 寸，厚度（桿頭前後方向的尺寸）比裏部1 1 b的深度稍大 (例如0 · 5〜2 m m左右）。 組裝推桿桿頭時，把插入構件3 0插入裏部11 b後，使 附有蓋體2 3的後半體2 0與前半體1 0組合，鎖入螺栓1 4。 藉此，外周棒狀體21的兩端面21 a接觸於缺口部1 2的裏 8 326\專利說明書(補件)\93-09\93208951 M262233 面，同時，蓋體2 3 —邊按壓插入構件3 Ο，一邊接觸於高 度差面11 c。插入構件3 0係無間隙地緊密接觸於裏部11 b 的整個内周和蓋體2 3的整個面。 經由在該推桿桿頭1上安裝桿軸，完成推桿用桿。 因為在使用該推桿用桿擊球時所產生的衝擊被插入構 件3 0吸收，故擊球感變得柔和。由於該插入構件3 0係無 間隙地緊密接觸於前半體1 0和蓋體2 3，且插入構件3 0與 擊球面1 0 a的距離很小（較佳為1〜5 m m，特佳為2 ~ 4 m m 左右），所以衝擊被充分吸收。 另外，在本實施形態中，由於高比重的後半體2 0成為 圓弧狀，所以推桿桿頭的擊球區域加寬，偏離中心時的衝 擊較小。 本創作中並沒有特別限定，但作為前半體1 0以由鋁、 鎂、鈦、或者該等之合金等所構成的比重2〜5左右的物質 為佳。 作為後半體20，以由不銹鋼、銅合金、鎢、鎢合金（例 如W— Cu合金、W—Ni合金）等所構成的比重7〜14左右的 物質為佳。 【圖式簡單說明】 圖1係實施形態之推桿桿頭的分解立體圖。 圖2係圖1之推桿桿頭的立體圖。 圖3係圖1之推桿桿頭的仰視圖。 圖4係圖3之I V — I V線剖視圖。 (元件符號說明） 9 326\專利說明書(補件)\93-09\93208951 M262233 I 推桿桿頭 10 前半體 10a 擊球面 10s 底面 II 凹處 11a 入口部 1 lb 裏部 11c 高度差面 12 缺口部 13 插通口 14 螺栓 15 桿軸插入孔 20 後半體 20a 斜面 2 1 外周棒狀體 22 中央棒狀體 22a 内螺紋孔 23 蓋體 24 螺栓 30 插入構件 326\專利說明書(補件)\93-09\93208951M262233 新型 Description of new models: [Technical field to which new models belong] This creation is about putter heads used in golf, especially about putter heads with good shock absorption when hitting golf balls. [Prior art] Japanese Patent Laid-Open No. 2000-1 190 7 2 1 describes that in order to absorb the impact when a putter head hits a ball and improve the feeling of hitting, A resin material such as a polyurethane resin is provided on the spherical surface. (Patent Document 1) Japanese Patent Laid-Open Publication No. 2 0 0 1-1 9 0 7 2 [New content] (New type of problem to be solved) In the aforementioned Japanese Patent Laid-Open No. 2 0 0 1 — 1 9 0 7 2 In the putter head of the first gazette, since the resin material is exposed on the hitting surface, the resin material is susceptible to damage and has poor financial properties. The purpose of this creation is to provide a putter head that is excellent in shock absorption when hitting and has excellent durability. (Means for solving the problem) The putter head of this creation has: a front half body made of a low specific gravity metal with a front face as a hitting surface; and a rear half body made of a high specific gravity metal and mounted on the rear side of the front half; And an insertion member made of rubber or synthetic resin arranged along the ball striking surface inside the front half. (Creative effect) In this putter head, the impact when hitting the ball is absorbed by the rubber or synthetic resin insert member inside the front half. 5 326 \ Patent Specification (Supplement) \ 93-09 \ 93208951 M262233 Since this insertion member is arranged along the ball striking surface, it is easy to absorb impact. In this creation, it is preferable that a recess is provided on the back of the front half, and the aforementioned insertion member is disposed in the recess, and the insertion member is pressed through the rear half. In this case, since the insertion member is strongly pressed and tightly contacts the front half body, the impact generated on the front half body is surely transmitted to the insertion member and can be sufficiently absorbed. In this creation, the putter head can also have the following structure: the front half extends in the direction of the tip and heel, and the rear half is continuous from the tip side of the front half to the heel side and is behind the forward half The projected outer peripheral rod-shaped body and the central rod-shaped body protruding rearward from the center in the direction of the tip and heel of the front half body and connected at the rear end to the outer rod-shaped body are integrally formed in the central rod-shaped body. The front end of the body is provided with a cover sized to fit into the recess, and the rear half is connected to the front half in such a manner that the cover presses the insertion member. With this configuration, the moment of inertia around the center of gravity of the putter head is increased, and the hitting area of the putter head is widened. In addition, the insertion member is fully pressed against the front half via the cover. In this case, it is preferable that the recess is formed by: a relatively large entrance portion recessed from the back of the front half body; a relatively small inner portion provided on the inner side of the entrance portion; and a portion formed between the entrance portion and the inner portion The height difference surface is substantially parallel to the hitting surface, the insertion member is disposed in the inner portion, and the cover body contacts the height difference surface. In this way, the cover body is arranged on the back, and the cover body that is pressed against it is brought into contact with the height difference surface, whereby the insertion member is compressed at a predetermined ratio. Thereby, the designed shock absorbing characteristics are reliably exhibited. [Embodiment] 6 326 \ Patent Specification (Supplement) \ 93-09 \ 93208951 M262233 The embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 4. FIG. 1 is an exploded perspective view of a putter head according to an embodiment, FIG. 2 is a perspective view of the putter head, FIG. 3 is a bottom view of the putter head, and FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. This putter head 1 is composed of a front half 10 made of a low specific gravity metal material, a rear half 20 made of a high specific gravity metal material, and an insertion member 30 made of rubber or synthetic resin. The front half 10 is a substantially rectangular parallelepiped shape extending in the direction of the tip and heel connecting the tip (left end in FIG. 2) and the heel (right end in FIG. 2). In addition, the bottom surface 10 s of the front half body 10 has a circular arc shape that bulges slightly downward at the center side in the direction of the tip and heel. The front surface of the front half 10 is the hitting surface 10 a for hitting the ball. A recess 11 is provided on the back of the front half 10 near the middle in the direction of the tip and heel. The recess 11 is formed by: an entrance portion 1 1 a, an inner portion 1 1 b recessed from the back side of the entrance portion 1 1 a (hitting surface 10 a side) toward the hitting surface 1 0 a, A height difference surface 1 1 c at a boundary portion between the entrance portion 1 1 a and the back portion 1 1 b. The entrance portion 1 1 a extends in the direction of the tip and heel, and is formed as a notch that opens toward the back and bottom of the front half 10. The inner portion 11b has a groove shape recessed from the surface on the side of the ball striking surface 10a of the entrance portion 11a. The inner portion 11 b extends in the direction of the tip and heel. The inner portion 1 1 b is slightly smaller than the entrance portion 1 1 a, and there is a height difference surface 11 c across the entire periphery of the inner portion lib. Notches 12 are also provided on the back surfaces of both ends in the direction of the tip and heel of the front half 10, which are also open to the bottom 10s. The insertion of the bolt 14 is inserted through the insertion surface 10 a side of the notched portion 12 and the impact surface 10 a. 7 326 \ Patent Specification (Supplement) \ 93-09 \ 93208951 M262233 through hole 1 3. This insertion hole 13 is the same as the insertion hole 2 3 a described later. The ball striking surface 10 a side is a large diameter portion, and the back side is a small diameter portion. The head of the bolt 14 is disposed in the large diameter portion. In the upper surface of the front half 10, a shaft insertion hole 15 is penetratingly provided on the heel side. The rear half body 20 includes a semicircular arc-shaped outer rod body 21, a central rod body 2 connected to the central portion in the extending direction of the outer rod body 21, and integrated into one. The cover 23 of the front end surface of the central rod-shaped body 2 2. The bottom surface of the rear part of the central rod-shaped body 22 is the inclined surface 20 a (FIG. 4) having a slope toward the rear end of the rear half body 20. Both ends of the outer peripheral rod-like body 21 have a shape and a size which fit into the notch portion 12, and a female screw hole (not shown) coaxial with the insertion hole 13 is provided on the both end surfaces. Both ends of the outer peripheral rod-shaped body 21 are fitted into the notch portion 12 and the bolts 14 are screwed into the internally threaded holes to connect the front half 10 and the rear half 20. The cover body 2 3 is fitted in the size of the inlet part 1 1 a. As shown in FIG. 4, the bolt 24 is locked into the female screw hole 2 2 a provided on the front end surface of the central rod-shaped body 2 through the insertion hole 2 3 a provided in the cover body 23. The lid body 23 is fixed to the central rod-shaped body 22. The insertion member 30 has a horizontal and vertical dimension substantially equal to the aforementioned inner portion 1 1 b, and has a thickness (a dimension in the front-back direction of the head) slightly larger than the depth of the inner portion 1 1 b (for example, approximately 0.5 to 2 mm). When assembling the putter head, insert the insertion member 30 into the inner portion 11 b, and then combine the rear half 20 with the cover 23 and the front half 10 to lock the bolt 14. Thereby, both end surfaces 21 a of the outer peripheral rod-shaped body 21 are in contact with the inside of the notch portion 12 2 326 \ Patent Specification (Supplement) \ 93-09 \ 93208951 M262233 surface, and at the same time, the cover body 2 3-side presses the insertion member 3 〇, while contacting the height difference surface 11 c. The insertion member 3 0 is in close contact with the entire inner periphery of the inner portion 11 b and the entire surface of the cover body 23 without any gap. A shaft for a putter is completed by attaching a shaft to the putter head 1. Since the impact generated when hitting the ball with this putter is absorbed by the insertion member 30, the hitting feeling becomes soft. Since the insertion member 30 is in close contact with the front half 10 and the cover 23 without a gap, and the distance between the insertion member 30 and the ball striking surface 10 a is small (preferably 1 to 5 mm, particularly good) (Approximately 2 to 4 mm), so the impact is fully absorbed. In addition, in this embodiment, since the rear half body 20 having a high specific gravity has an arc shape, the hitting area of the putter head is widened, and the impact when off-center is small. There is no particular limitation in this creation, but as the front half 10, a substance having a specific gravity of about 2 to 5 composed of aluminum, magnesium, titanium, or an alloy thereof is preferred. As the rear body 20, a material having a specific gravity of about 7 to 14 made of stainless steel, copper alloy, tungsten, tungsten alloy (e.g., W-Cu alloy, W-Ni alloy), or the like is preferable. [Brief description of the drawings] FIG. 1 is an exploded perspective view of a putter head according to the embodiment. FIG. 2 is a perspective view of the putter head of FIG. 1. FIG. FIG. 3 is a bottom view of the putter head of FIG. 1. FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3. FIG. (Explanation of component symbols) 9 326 \ Patent Specification (Supplement) \ 93-09 \ 93208951 M262233 I Putter head 10 Front half 10a Hitting surface 10s Bottom surface II Recess 11a Entrance 1 lb Inner 11c Height difference surface 12 Notch 13 Insertion opening 14 Bolt 15 Lever shaft insertion hole 20 Rear half 20a Bevel 2 1 Peripheral rod 22 Center rod 22a Internal screw hole 23 Cover 24 Bolt 30 Insert member 326 \ Patent specification (Supplement) \ 93-09 \ 93208951