TW200306221A - Head for golf club iron - Google Patents

Abstract

To provide a head, for a golf club iron, which has a high impact restitution to a ball to be hit, which imparts great spin to the ball, has great resistance to scratching, has superior strength, and has excellent durability. A head 1 for a golf club iron is provided with a head frame 2, which is integrally molded from an iron alloy, and with a plate-shaped face material 4 and a plate-shaped backing material 5 inside the opening portion 3 of the head frame 2. With this structure, the surface of the face material 4 is made a surface for hitting a ball. The face material 4 is made of a spring steel, and is bonded to the head frame 2 by welding. The backing material 5 is made of a material having a specific gravity of 4.4 or less and having a high specific strength and a high specific elasticity, such as an FRM.

Description

200306221 (1) Description of the invention: [Technical field to which the invention belongs] The present invention relates to a golf iron head, which is composed of a plurality of members', which can improve the strength, durability, rebounding properties and spin imparting properties. [Prior Art] In order to have various characteristics at the same time, conventional golf iron heads are usually obtained by combining a plurality of components composed of different materials. Fig. 6A is a rear view showing a prior iron club head viewed from the back side, and Fig. 6B is a cross-sectional view taken along the line A-A of Fig. 6A. Fig. 7 is a rear view showing another conventional golf iron head, and Fig. 7B is a cross-sectional view taken along line AiB_B in Fig. 7. Furthermore, FIG. 8A is a rear view showing still another previous golf iron head, and FIG. 8B is a view along FIG. 8A. One. Sectional view of the line. Further, Fig. 9A is a rear view showing still another suitable golf iron head, and Fig. 9B is a cross-sectional view taken along line 8-0 of Fig. 9. Further, Fig. 1GA shows another-the back face w of the previous golf iron head, and Fig. 10B is a cross-sectional view taken along line E-E of Fig. 10A. As shown in ® and Figure 6, the previous golf iron head 51a (hereafter referred to as the "first apron skill") is provided with a head body 52a, which is composed of iron kings such as iron steel and has a flat back. In the structure, a face member 53a made of the same material as the material forming the head body, such as a copper alloy, is embedded in an area corresponding to the hitting surface of the head body. The shaft member ... is fixed to the head body by means of connection, fitting, material, burst, etc. In this way, you can improve the touch and design of the golf club head. 'As shown in Fig. 7A and Figure Chuan' In another-the previous golf iron head ⑽ (hereinafter referred to as the second previous ，, composed of residual "head body 82254 200306221 52b is covered with a hitting surface and back CFRp (㈤.n⑽ 以 ⑽ 也 ⑽ PUstics: carbon fiber-reinforced plastic) is a coating ". This reduces the position of the center of gravity of the club head. Furthermore, as shown in Figures 8A and 8B, in another-previously In a golf iron head 5U (hereinafter referred to as the third prior art), the head body is formed by

The concave back structure made of rust steel, the back surface of the head body 52c is followed by a back surface component 5 5 made of CFpR. Burial &amp;, 丄, α π y, y y 万; θ surface member 5 5 absorbs vibrations when hitting the ball, so it can improve the tactile feeling when hitting the ball. / Furthermore, as shown in FIG. 9A and FIG. 9B, still another previous golf iron head 51d (hereinafter referred to as the 4th prior art) is provided with a head frame 58d, which is made of stainless steel, soft iron or Be— The Cu alloy has openings in the area corresponding to the ball striking surface and the area corresponding to the back surface. In addition, the above-mentioned area corresponding to the hitting surface in the opening part 杆 of the head frame training is provided with a face made of 邰. Thereby, an opening portion is provided, and the face member 53d is formed of titanium having a specific gravity of 4.5 (less than non-iron steel and soft iron), so that the weight of the head can be reduced. In addition, the face member 53 (1) will smash at the time of hitting, which can improve the rebounding property of the hitting ball. Another conventional golf iron head is shown in FIG. 10A and FIG. 10B. This golf iron head 51e (hereinafter referred to as the fifth prior art) was developed in the past by the inventors of the present case and disclosed in Japanese Patent Publication Gazette No. 7-12 丨 284. As shown in FIG. 10A and FIG., The golf iron head We A head frame 58e made of a metal material is provided in the head frame Me, and an opening portion 56e is formed in the area corresponding to the ball striking surface and the area corresponding to the back surface. The opening portion 56e is also formed. The aforementioned area equivalent to the hitting surface is provided with FRP (Fiber Rein Wed Plasties: Fiber Reinforced Plastic 82254 200306221): a raised face member 53e. Also, the area of the head frame 58 and the face member 53e The "thrust surface" is a metal thin film 57 whose surface conductivity is below the rigid center. This fifth prior art uses FRP to form a face part ... Compared with the aforementioned fourth prior art, the weight of the club head is further reduced, and In the next one, you can post I ^? 疋 with the handball and rebound. Also, know A metal film is formed on the "spherical surface". The head frame 58e and the face part composed of FRP are two. The appearance is different. The problem point of /. The above 1st prior art ... &quot; Sheng :: Jinshuo can "tactile touch when hitting and the problem of the golf club head." &Quot; Low # ball flight distance is not too long to ask again, the above In the second prior art, there is Η% ^ of CFRp damage, and the weight of the coating layer 54 is easy to ask. X, there is also the problem of the degradation of the coating layer 5. Make the I ball turn around and give it again. In the third prior art described above, the back part &lt; vibration-proof function can describe the old-fashioned L, force ##, & &quot; And the problem of spin imparting. That is, the red gate #ball iron club head 5 丨 Gu Zeqi poses the ball "Ask the rebound and spin imparting and the stainless steel iron club head Equivalent. In the second and fourth prior arts above, the face member is made of titanium, the dry head frame is made of stainless steel, and the like. Therefore, the two are not connected. Therefore, the face member 53d can only be fixed to the head frame with a joint filler, and there is a problem that it cannot be fixed at 82254 200306221. In addition, rust steel and soft Iron, but smaller than FRP, it is more rigid than not. It is difficult to make it lighter. Furthermore, Qin Wu: Wanshen, so the effect of improving the rebound of the ball is limited. 'By forming the face member 53e with frp ㈣ 4 Compared with the previous technology, it can reduce the weight and the rotation imparting property of the club head. Bo Θ mountain, Λ ^ Pinggong-ri and Manga frame 58e ^ human part 53e It is composed of A by FRP, and the head C 5 8 e is composed of metal material fixing material. '--You cannot use welding and other methods to securely have σ, 53' and the head frame. He must use bonding or caulking material. Fixed, stone candle: 『: The problem of low solid strength. In addition, the metal thin film 57 is liable to be peeled or abraded due to a small ◊ ◊ 冲 collision, and therefore has a problem of insufficient durability. In addition, when manufacturing the golf iron head 51e, the surface part = Table ㈣❹1 line was formed first, and then the metal film 57 was formed. Therefore, the surface treatment of / k 仃 Sandblasting Temple could not be performed. Inadequacy. The present invention has been developed by the present invention in view of the above-mentioned problems, and an object thereof is to provide a high-M iron head &apos; which has high rebounding and spin imparting properties, damage resistance and strength, and good durability. [Summary of the Invention] A method for solving the problem The golf iron head of the present invention is characterized by having a head frame, which is made of metal or alloy. The area corresponding to the hitting surface on the surface and the area corresponding to the back surface are: Opening; face parts, which cover the aforementioned area equivalent to the hitting surface and are fixed to the aforementioned head frame by welding and are made of metal or alloy; 1 back support member 'which is on the back of the aforementioned face member: It is placed in contact with the head frame. 82254 200306221 In the present invention, since the head frame with an opening is provided, the weight of the iron head (hereinafter referred to as the head) is reduced and the center of gravity is reduced. Surface parts and back support parts: Multi-layer structure, so compared with the case of single-layer structure, the amount of Γ-shaped deformation can be increased. Eucalyptus a # ^ j to increase the "mystery". Hunting by increasing the amount of elastic deformation can be extended, and "~" time, and improve the energy efficiency of the club head to the ball. Efforts can improve the club head The ball is rebound. Ding is made of gold τ which can be welded to the head frame. It is fixed to the head frame by dazzling connection. 2 = plate formation. Ball-hitting surface "Damage resistance, and can be rotated and imparted to the surface feeding of the cup fabric. J-Ja-batting &<; again :: The end of the back support member is preferably embedded in the aforementioned club head This way, you can support the back as a beam, but the back part will be finished with ^ 支 彳 牙 # pieces, so that it is independent of the face part II: Improve the rod formed by the face part and the back support part _ ,,, ° can further improve the rebound of the ball. It can further reduce the weight of the club head and be 4.4 or less. This allows' free production. The choice of five-t temples improves the design of the club head. With this, the reentrant parts can also overlap a plurality of plates to form the ball's resilience. Also, the elastic deformation of the high back support member And blow, by a combination of fine imperial ~ mutually different plural sheet material, may be any "..., strength, coefficient of restitution variety of kinds of user requirements. m, temple, can satisfy each 82254 200306221 Also, the aforementioned back support member is preferably selected from C: FRP (㈤.n Fiber

Reinforced Plastics (衩 fiber reinforced plastic), GFRp⑹ order

Reinforced Plastics · st ^ ^ 口 厶 n ,,,, • Reinforced Plastics), CFRTP (Carbcm Fiber

Remforced ThermoPlastlcs: Thermoplastic carbon fiber reinforced plastics), _ alloys, A1 alloys, i or two or more types of groups consisting of alloys and FRM (Fiber Reinforced Metals: fiber reinforced metals). In addition, the aforementioned back support is 7 τ northward, and I also know 4 pieces. &Lt; The surface on the back side can also be decorated. : This can increase the commodity value of the head. In addition, since the back side of the back support member can be decorated before assembling the pole cymbal, two value-added products can be manufactured at low cost. [Embodiment] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. First, = i-th embodiment of the present invention. Fig. 1A is a front view showing the golf iron trunk of the present embodiment, viewed from the side. Fig. 1B is a cross-sectional view taken along the line MF-F, and Fig. 1C is an enlarged cross-sectional view of a portion of Fig. 1B. As shown in FIG. 1A, the golf iron head of this embodiment! In the design, the shaft part 23 and the head of the shaft 2 'are formed in a single body, and are made of soft iron or a core. As shown in FIG. 1B, an opening 3 is formed in the head frame 2, and the opening is opened on the surface corresponding to the center of the hitting surface and the area opposite the rear surface ^ on the surface facing the opening 3 of the sample head frame 2 ( Τ is called the head frame] The inner surface ^ forms the step difference and takes the ¥ step difference to take 2g to form on the inner surface ^ The whole circle is shown in Figure 1A and Figure 1B. In the golf iron club head, a face member 4 is set upright And the back support member 5. The shape of the face member 4 is four 82254 -10- 200306221 angle: ⑽ 'its end is fitted into the step difference, and is connected to the head frame 2 by a laser or t. Therefore A plurality of welded joints 6 are formed on the end of the face member 4. By this, the lever 4 and 4 are arranged based on the opening 3. That is, # 面 邵 件 4 系 covers the head The frame 2 is arranged in the area 2c. Lin is out of the m &mid; face component of the hitting surface Yang class Γ outside the iron head 1. Thereby, the surface of the face: member 4 becomes a golf iron head 丨The shape of the branch phase 5 is a four-corner opening, and it is placed on the back side, and the plate is arranged in the 3rd part, which is overlapped with the face component 4 and # 面 汉 件 4. The face-to-face face is in contact with the rod, and the face 4 side. The four sides of the end of the support member 5 are fitted on the entire circumference of the step 2g. Dream ^ as shown in Figure 1C The part 5 is formed by the face part 4 and the head frame. The face part 4 is formed of elastic steel, for example, one. Steel, gSteel, or a sup (spring steel material) as described. For example, from 0.6 to 2.5_ ', the surface of the hitting surface is formed with, for example, a ruled line 7 parallel to each other. The direction in which the ruled line 7 extends is approximately horizontal when the ball is hit. It is made of high specific strength # bullet material of ⑽ ⑽ ⑽ 卜卜 卜 alloy post gold, such as delete. Read for example · s_Al2〇32B2〇3) staple fiber (whis = reinforced Ming alloy. The specific gravity of the back support member 5 It is 44 or less. Also, if the thickness of the face member 4 is less than 0.6, the material of the face member ... may be insufficient in strength of the face member 4. In addition, in order to form a score line (groove) in the rod 4 ) 7, it must have a thickness of more than 0. 6_. On the other hand, if the thickness of the face member 4 exceeds 2.5, the rigidity of the face member 4 is too high 8 2254 200306221, will reduce the rebound of the ball and reduce the initial velocity of the ball. Therefore, the thickness of piece 4 is preferably 0-6 to 2.5. The dry mouth, and secondly, the method of manufacturing the golf iron head i is explained below. First, make or cast soft iron or iron alloy to form 2 φ as a whole; howl, at this time, at the same time, a step difference is formed on the inner surface of the head frame ~ or stepwise machining is performed to form a step difference and 2g. Second, : Machine-to-opening step 3 2 other square teeth 4 pieces 5 fitted on g and 10,000 faces, Cr ~ Mo steel, Gao Mi Ling plus cutting) or SUP thickness of 0.6 to 2.5 mm Plate 2 = The desired shape is formed. After the surface treatment of one side of the mouthpiece / the mouth of the cigarette is performed, β is formed by forming a score line 7 on the surface to make the longitudinal direction of the supporting member 5 γ σ 1 at this time. The size of the back of the back brace 5 is 1 or more smaller than that of the face member 4. Next, the face member 4 is fitted. Second: The ends of each sentence 4 are welded by laser: Twenty stem faces, so that the end of the back support member 5 ^ tr frame 2. At this time, the near inner 0.5 is followed by ±, and the configuration: 1 &quot; The end edge of the dry surface member 4 is further connected, so that the support member 5 and the face member 4 are set. The gas is generated, causing pinholes and other unsupported parts: "combustion or gasification" and the ends are head i of the head frame 2 and the face member / month / support member 5. The temple can thus make a golf iron. In this embodiment, due to the phase division (hereinafter referred to as the body structure of the hitting surface of the iron head 1 1), the 4th fragrant ^ / 一干 邵 件 4 and the back Supporting part 5-2, phase r, prior art, etc. The club face is divided into a single layer structure "down" which can increase the contact time between the hitting surface and the ball at that time, and increase the ball-to-ball energy conversion. Efficiency 82254 -12- 200306221 Yu Gengyang explained the effect in detail, and improved the rebound of the ball. The following

2A to 2D are schematic diagrams showing the deformation process of the face portion. FIG. 2A shows the case where the face portion 8 is formed by a single plate, and FIG. 3C shows the deformation process. FIG. 2C shows the face portion 9 is overlapped. 2 sheets of equal thickness = formation situation 'Fig. 2D shows the deformation process. The plates shown in Figs. 2A and 20 are made of the same material, and their mechanical properties are equal. The thickness of the plate shown in Figure 2a and Figure a is hl, and the amount of deformation when a fixed weight w is applied to the face portion 8 is (5 ,, and the thickness of the plate shown in Figure 2C and Figure 2D are each &amp; (h2 / 2), the amount of deformation when a certain weight w is applied to the talented face portion 9 is represented. The strength of the face portion 8 shown in Figs. 2A and 2B is obtained by the following formula shown in Figs. 2C and 2D. The strength of the entire face portion 9 is obtained from the following formula. The rigidity of the face portion 8 is obtained from the following formula 3, and the rigidity of the body of the face portion is obtained from the following formula 4. Also, a & b is the coefficient. knife &lt; h {2

(Formula 1) (Formula 2) (Formula 3) (Formula 4)

The car is good, and just built to get the choice. As far as the face of the Nanlf club is concerned, its high strength and low specificity are better. Therefore, if the face portion is to be formed into a two-layer structure, the single-layer structure of the driver ’s single-layer structure has high strength and low rigidity, and the values of h2 in Equations 5 and 6 are sufficient. (Equation 5) αχ / η2 ax / ^ 2Z &lt; 2 (Equation 6) bxh \ η bx &gt; ——— 4 82254 -13- 200306221 The above-mentioned Equation 5 is ―heart to upper ⑽ ~ formula 8 lead. 7) V2X / ZJ &lt; fl2 (Equation 8) h2 &lt; νϊχΑ] Combining the above equations 7 and 8, the following equation 9 holds. (^ 9) 41x /? | &Lt; h2 &lt; \ 58x / q Therefore, for example, if the structure is made, and the single-layer structure is used to precisely form the face part into 2 layers only 乂 and down, but Jiang Gu can take this, Can make part of the defense surface: insects' ugly and reduce rigidity. Figure ™ face is divided into "; SI :::: — Photo: Epigraph 2: When the Γ part is a 2-layer structure" ... The contact time between the spherical surface and the ball. In this way, π can ask the private · 1 to the ball's energy conversion effect 疋 i put back to the ball "rebound. In this embodiment, since the opening 3 is formed on the frame 3 on the frame P3, the head of the talent is light and the position of the center of gravity is low. * Furthermore, the head frame 2 is made of soft iron or ferroalloy, and the face is formed by spring steel. ^ The head frame 2. In this way, compared with the case where the surface material 4 of the sew material is welded to the ,,, ^ 材 寺 | # 面 绍 件 4 is fixed to the head frame 2, the strength of Sahong can be reduced with the strength of the cup head. To improve durability and reliability. In addition, by forming the face member 4 with spring steel, the damage resistance of the ball striking surface can be improved, and a desired surface treatment can be performed on the surface, and the spin imparting property of the ball can be added. Further, since the abrasion of the ball striking surface can be suppressed, it is possible to prevent a decrease in the frictional coefficient of the ball striking surface from causing a decrease in the rotation imparting property. Furthermore, in this case, the back support member 5 is made of CFRp, GFRp, CFRTP, Mg alloy, A1 alloy, Be alloy, or frm. Its specific gravity is 82254 -14- ZUUJUb221 Η4μ4 or less, so it can be achieved further. Lightweight and low center of gravity. : ’The golf iron of this embodiment has a wide range of choices such as the position of the center of gravity and the moment of inertia, and has a high degree of freedom in design. In addition, with any combination: two Young's coefficients, viscoelasticity, and other face parts with different material properties 4 and back: 'the strength of the head can be adjusted arbitrarily, the rebound coefficient, and the salt LΛ when hitting can meet the user's needs. Club head speed and feel (hitting heart: a variety of user needs caused by good differences. 古 一? 罘 2 betta example. Figure 3 shows this embodiment * 、 尔夫 铁 # ^ Zhen &lt; An enlarged sectional view of a part of the structure. In this example, the Nanlf iron iron headband, the t-section support member &amp; is formed by overlapping the middle member and the back member 1. The middle member H) and the back member &quot; The end is embedded in the head frame 2. The intermediate member 10 is made of cfrp, gfrp, cfrtp, gold, A1 alloy, or Be alloy. The surface of the back part ^ of the back part ^^ is exposed on the outside of the head. The surface is decorated, and the face part 11 can be formed of any material. For example, it can be the same as the material of the middle part 10, or it can be epoxy. Resin or ABS resin (acrylonitrile butadiene — resin: propionitrile butadiene. Styrene resin) and other plastics, but the shoulders are materials that can be decorated. The specific weight of the entire back support member h is 4 to 4 or less. The structure of the golf iron head of this embodiment other than the above is the same as that of the golf iron of the lf embodiment (see FIG. 2C). 11: 1 ,,, and / or record states the manufacturing method of the golf iron head of this embodiment. First, a soft iron or ferroalloy HI-shaped head frame 2 is forged or * forged. At this time, a step _ is formed on the inner surface 2e of the head frame 2. On the other hand, by 82254 -15-200306221 treatment, ion membrane or coating or the like. ^ 二 = 材 的 表 ^ Pack, make the back part π, so that the back: two or two? Fitted to the step 2§ in the opening 3. At this time side. Xi Jinjin's decorative surface is exposed on the back of the head frame 2. The intermediate member 10 is fitted to the step member 11 to overlap. S is enough to make a θ face. On the other hand, Cr—Mo, ancient reform

The formed thickness is 0.6 to 2 5 m ^ g steel) or SUP mm 芡 plate processed into the desired shape, and after the desired surface treatment is performed, a score line 7 is formed on the surface to dry the piece 4 . Next, the face member 4 is fitted to the step 2f, and the end of the face member 4 is welded to the head frame 2 by laser beam welding. The back support member 51 composed of the face member 11 and the intermediate member 10 is sandwiched by the cup head frame 2 and the face member 4. In this way, the iron head of this embodiment can be obtained. In this embodiment, 'because the back support member 5a is composed of the back member ^ and the middle member _cheng', the face portion of the golf iron head is made up of three layers consisting of the rod = material 4, the middle member 10 and the back member Η structure. Therefore, in comparison with the foregoing i-th embodiment, the amount of deformation J of the elastic portion of the face portion can be increased to further improve the rebounding performance of the ball. (By combining ^ plates with different materials, you can adjust the club head strength, rebound coefficient, and tactile feel when the ball is in a larger garden, and improve the freedom of club design. ~ Furthermore, By decorating the surface of the back part Π, the design of the back side of the steamed bread can be improved. As a result, the added value of the product can be increased: 82254 -16- 200306221 After the decoration 11 is processed, the back Parts 丨 H and installed; ^ 人 ^ said the head frame 2, so it can be decorated at% 旰 11, and clothing A talents can be decorated. Therefore, the production of J PfJ ^ caused by the decoration can be suppressed. 成本In other words, it is possible to realize the design value-added value-added business at a low cost. ~,, M ^ ° W Implementation examples "The effects other than the above are the same as those of the aforementioned brothers. [Example] The following ' The effects of the present invention will be described in detail by comparison with comparative examples outside the scope of the Chinese patent. Brother 1 Test Example Figure 4 A shows the example of Ming Yu Shao She, A; Sectional view of the head 'Fig. 4B shows ▽ * Comparative example of the golf iron head 4A and 4B. As shown in FIG. 4A, the structure of the golf iron head 12 according to the embodiment of the present invention is the same as the i-th embodiment described above. The surface member 4 is formed of high tension steel with a thickness of W mm, and the back support member 5 is formed of a FRTP laminated material with a thickness of 3 mm. That is, the thickness of the talented face points 13 is 4 mm in total. In the golf iron cup head 12 shown in FIG. 4A, the pRTp laminated material is a carbon fiber cloth and a polycarbonate sheet parent laminated layer of 12 layers. In addition, the head frame 2 is composed of carbon (c) content of 0.2 Mass% of soft iron S-20C. The reclining angle of the golf iron head 12 00ft heart §1 is 21 °, and the mass of the head is 242g. Also shown in FIG. 4B, the golf iron of the comparative example The head 14 is integrally formed by s-20c. The thickness of the golf club face 4 of the golf iron head 4 is 4 mm. The reclining angle of the golf iron head 14 is 21. The quality of the head It is 242g. 82254 -17- 200306221 Second, the actual trial play is performed using golf clubs with golf iron heads 12 and 14. The parts other than the club head use the same items. Also, the ball used is B / S NEWING. Also, the weather when the test is played is sunny and windless. The actual test results are shown in Table 1 and Table 2. Table 1 shows the test results of the embodiment of the present invention, that is, the test results of the golf iron head 12, and Table 2 shows the test results of the comparative example, that is, the test results of the golf iron head 14. Table 1】

No. Club head velocity of backspin, stagnation distance, rolling distance, total flight speed (m / s) (rpm), distance (m / s) (yards) (m) (yards) (m) (yards) (m) 1 39.5 55.5 2630 194 177 18 16.5 212 194 2 38.5 54.6 2780 192 176 12 11.0 204 187 3 39.2 54.7 3210 194 177 13 11.9 207 189 Solid 4 39.0 54.1 2700 192 176 15 13.7 207 189 5 40.0 56.4 2610 201 184 14 12.8 215 197 Application 6 39.5 52.1 2470 183 167 18 16.5 201 184 Case 7 39.3 56.0 2540 202 185 16 14.6 218 199 8 39.1 55.2 2360 191 175 20 18.3 211 193 9 40.0 55.4 2470 199 182 16 14.6 215 197 10 40.1 55.1 2710 199 182 12 11.0 211 193 Mean 39.42 54.9 2648 194.7 178.0 15.4 14.1 210.1 192.1 [Table 2] 82254 -18-200306221

No. Club head initial velocity, backspin, stagnation distance, rolling distance, total flight speed (m / s) (rpm), distance (m / s) (yards) (m) (yards) ㈣ (yards) ㈣ 11 39.3 52.6 2590 185 169 14 12.8 199 182 12 39.3 53.0 2496 183 167 15 13.7 198 181 13 38.5 54.8 2440 188 172 17 15.5 205 187 14 39.5 53.2 2780 184 168 168 16 14.6 200 183 to 15 38.9 53.9 2090 183 167 20 18.3 203 186 to 16 39.7 55.3 3010 196 179 12 11.0 208 190 Case 17 40.4 55.2 2510 193 176 17 15.5 210 192 18 39.3 52.6 2430 180 165 19 17.4 199 182 19 39.6 54.6 2330 190 174 18 16.5 208 190 20 39.4 55.2 2180 186 170 19 19.4 204 187 Mean 39.40 54.0 2486 186.8 170.5 16.7 15.2 203.4 185.7 As shown in Tables 1 and 2, when the golf iron head 12 of the embodiment of the present invention is used, compared with the golf iron head 14 of the comparative example, although the head The speed is equivalent, but the ball rebounds and spins well. Therefore, the average ball velocity is 5 4 · 9 m / sec, which is 0.9 m / sec higher than the average velocity of the ball in the comparative example. Backspin The average speed of 2648 rpm, the rotational speed of Comparative Example (mean 248 6 rpm) higher 162 rpm. As a result, the dead space (average 178.0 m) of the embodiment of the present invention is 7.5 m larger on average than the dead space (average 170.5 m) of the comparative example, and the total flight distance (average 192.1 m) in the embodiment is larger than the comparative example. The total flight distance (average 1 8 5 · 7 m) is 6.4 m larger on average. On the other hand, the rolling distance (average 14 · 1 m) of the embodiment is shorter than the rolling distance 82254 -19-200306221 (average 15.2 m) of the comparative example, which is shorter than the average distance m. The angle of implementation of the present invention is higher than that of the comparative example. When the kick is used, the kick is too protective. If the soil speed is increased by 1 m / s, the head distance increases by 5 to 100 yards at the beginning of the ball. The same goes for the ancient head. ⑸ 雨 夫 irons make the thickness of the hitting ball and scoring eight / buckle, \, #knife (cup surface shaofen) thickness changes from 2 to 6 ^^ r r π to make 5 ancient edges + Can, and target circumference It is described as 5 Tongyu iron iron heads. The back of the face is made up of 2 pieces of I0U field talent face and P pieces of bismuth mouth, which are different. That is, this筌 Sa Zhao, photo, mouth leaf thickness Yigansi Cup ~ <Although the structure is the same as that shown in Figure 4 A, the rod Yan Fei 止, Zhi Hai y Di 1 test example of medium thickness and Figure A: Γ face parts The dimensions of the plate and the back support member are different. The ^ = pieces, the f-part support members, and the total plate thickness in the rod face used in the second test example are shown in Table 3. Organic use = ... husband Measure the club's muzzle velocity. The stroke of the ball is 'I Acoustic Maple'. The club head speed is 30m / sec and 4011 / sec. [Table 3 1

-20- 200306221 shows the value of E X t3 (kg · mm), E (kg / mm2) is the elasticity of the material and material forming the face part, and t (mm) is the thickness of the face part. The value is an index representing the size of the rigid. The solid circle (·) in the figure shows the test result when the head speed is 40 m / s, and the black triangle (▲) in the picture shows the test result when the head speed is 30 m / s. The numbers in the figure are the total thickness of the face. As shown in Fig. 5, the thinner the thickness of the face portion, the less rigid the face portion is. As the face portion becomes softer and the amount of elastic deformation becomes larger, the opposite elasticity of the ball increases, and the initial velocity of the ball becomes larger. — Increased the flight distance of the ball. For each m / s increase in muzzle speed, the flight distance of the ball increases by 4.7 m. [Effect of the invention]

As mentioned above, the present invention uses two sheets of a face member and a back support member to form a club head of a golf iron head, thereby reducing the rigidity of the face portion, increasing the contact time with the ball during the stroke, and improving the stroke. The ball bounced. This can increase the initial speed of the stroke and extend the flight distance. In addition, since the face member is formed of a metal or an alloy, the damage resistance and the spin imparting property are good, and the face member can be fused to the head frame, so the head is strong. Club head. [Brief description of the drawing] A cross-sectional view of the iron line head viewed from the side of the F line, FIG. 1C is a view of FIG. 1A is a high front view of the embodiment, and FIG. 1B is a view along the line ία 之 F — partly enlarged sectional view. Schematic diagram of the deformation process of Ai, as shown in Fig. 2A, and Fig. 2B shows its transformation. Figs. 2A to 2D show the face portion. The face portion 8 is made of a single plate. 82254-21, 200306221, and Fig. 2C shows the rod. The surface part 9 is formed with 2 equal degrees. Fig. 2D shows the deformation process. Fig. 3 is a partially enlarged sectional view showing the structure of a golf iron head according to a second embodiment of the present invention. FIG. 4A is a cross-sectional view showing a golf iron head according to an embodiment of the present invention, and FIG. 4B is a cross-sectional view showing a golf iron head according to a comparative example. Figure 5 is a graph of the effect of the stiffness of the non-face on the initial velocity of the ball. The horizontal axis is the rigidity of the face and the vertical axis is the initial velocity of the ball hit. 6A and 6B are views showing a golf iron head according to the prior art, wherein FIG. 6A is a rear view seen from the back side, and FIG. 6B is a cross-sectional view taken along line a-A of FIG. 6. 7A and 7B are views showing a golf iron head of the second prior art, wherein FIG. 7A is a rear view seen from the back side, and FIG. 7B is a cross-sectional view taken along line 8-B of FIG. 7. 8A and 8B are diagrams showing a golf iron head of the third prior art, wherein FIG. 8A is a rear view seen from the back side, and FIG. 8B is a cross-sectional view taken along line c-c of FIG. 8A. Figs. 9A and 9B are views showing a golf iron head of the fourth prior art, wherein Fig. 9A is a rear view seen from the back side, and Fig. 9B is a cross-sectional view taken along line D of Fig. 9A. Fig. 10A and Fig. 10β are views showing a golf iron head of the fifth prior art. Among them, Fig. 10A is a back view seen from the back side, and Fig. 丨 is a cross-section taken along line E-E of Fig. 10A. Illustration. [Illustration of Representative Symbols of Drawings] 82254 -22- 200306221 Head field component 1: Golf iron head 2: Head frame 2a: Shaft 2b: 2c: Area equivalent to the hitting surface 2d: Area equivalent to the back 2e: inner surface 2f, 2g: step 3: opening portion 4: face ^ 5: back support member 6: welded portion 7: score line 8, 9: face portion 10: intermediate member 11: back member 1 2, 1 4: Golf iron head 1 3, 1 5: Face portion 5 1 a, 5 1 b, 5 1 c, 5 1 d, 5 1 e: Golf iron head 5 2a, 5 2b, 5 2c: Head Body 53a, 53e: Face member 54: Coating layer 55. Back member 56d, 56e: Opening 57: Metal film 58d, 58e: Head frame a, b: Coefficient 1μ, I2: Thickness W: Weight (? !, (52: Deformation amount 82254 -23-

Claims (1)

200306221 Scope of patent application: 2. 4. The seeded iron head is characterized by: a head frame, which is composed of: a genus or an alloy, and the surface on the surface is equivalent to the area of the hitting surface and the surface <The area has an opening, the club face #, which covers the aforementioned area equivalent to: ^ face and area, and is fixed to the club head frame by welding, and is composed of metal or catty, and a back support member, which is similar to the aforementioned club face member. The back surface is arranged on the head frame in contact with the surface. j The golf iron head according to claim 4 of the patent scope, wherein the ends of the aforementioned support and support are embedded in the aforementioned head frame. According to claim 1, the golf iron head according to item 1 of the invention, wherein the back support member has a specific gravity of 4.4 or less. 5. 6. = According to the golf iron head of item 1 of the patent scope, the support parts of the 4th month are formed by overlapping a plurality of plates. = According to claim 4, the golf iron head of the patent scope, in which the front support member is formed by overlapping 2 to 5 sheets. … Declares that the golf iron head of item 1 of the patent garden, in which the front i 3 ^ dental member is a group selected from the group consisting of CFRP, GFRP, CFRTP, Mg, / 1 alloy, Be alloy and FRM It is composed of one or more kinds. 8. · The golf iron head of Patent No. 1 &amp; 11 Item 1 in which the front side supports the rear side of the supporting member with a decorative treatment. According to the patent application 簕 筮 丄 〃 〃 南 南 尔 南 其中 前 衣 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南 南, #, 所, '' and one or more methods of enchantment and enter 82254 200306221. 9. The golf iron head according to item 1 of the scope of the patent application, wherein the head frame and the face member are welded by laser welding or electron beam welding. 1 0. According to the Shalf iron head according to item 1 of the patent application scope, wherein the thickness of the aforementioned face member is 0.6 to 2.5 mm. 82254