TWI232763B - 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

1232763 发明 Description of the invention: [Technical field to which the invention belongs] The present ignorance relates to a kind of iron iron head, which is composed of a plurality of components, which can improve strength, durability, rebounding 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 the golf iron head of the first view from the back side, and Fig. 6B is a cross-sectional view taken along 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 AAB-B of Fig. 7. Furthermore, FIG. 8A is a rear view showing still another conventional golf iron head, and FIG. 8 is a cross-sectional view taken along the line c ^ c in FIG. 8. In addition, the figure is a rear view showing still another conventional golf iron head, and FIG. 9B is a cross-sectional view taken along line 8O-D of FIG. 9. Further, Fig. 10A is a rear view showing still another conventional golf iron head, and Fig. 10B is a sectional view taken along line E-E of Fig. 10A. As shown in Figs. 6A and 6B, the previous golf iron head is called the following X-first technique "the head body 52a is provided, which is composed of iron such as iron and steel and has a flat back structure" A face member 53a composed of a copper alloy or the like and the material Γ forming the head body 52a is embedded in the equivalent of the head body 52a in the bucket = area. The face part ... is fixed to the club head fi52a by means of * mouth, Ά, burst. This can improve the feel of the shot and the design of the golf club head. 5 2 'as shown in Figure 7A and Figure 7B' in the other-the previous golf irons SS 5 called the following skills) U gan ^ member 4 embroidered steel temple head body 82254 1232763 52b hitting surface And the back is covered with CFRp (Carb〇 ...

Plastics: carbon fiber reinforced plastic). This reduces the position of the center of gravity of the club head.

Furthermore, as shown in FIGS. 8A and 8B, in yet another conventional golf iron head 51c (hereinafter referred to as the third prior art), the head body 52. A concave back structure made of stainless steel is formed, and a back member 55 made of cFpR is attached to the back of the head body 52c. Accordingly, since the back surface member 55 absorbs vibrations at the time of hitting the ball, it is possible to improve the feel at the time of hitting the ball. Furthermore, as shown in FIG. 9A and FIG. 9B, in another conventional golf iron shaft 5 1 d (hereinafter referred to as the fourth prior art), a head frame 5 8 d is provided, which is made of stainless steel, soft iron Or Be-Cu alloy, which has openings in the area corresponding to the ball striking surface and the area corresponding to the back surface. In the opening portion 56d of the head frame 58d, a face member 53d made of titanium is provided in the aforementioned area corresponding to the hitting surface. Thereby, the opening portion 56d is provided, and the face member 53d is formed with sufficient titanium with a specific gravity of 4.5 (less than stainless steel and soft iron), and the weight of the head can be reduced. In addition, the face member 53d is bent when hitting the ball, which can improve the rebound property of the ball. Another Xian Li's iron head is shown in Figure A and Figure A. 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 is disclosed in Japanese Patent Publication Gazette No. 7121121284. As shown in FIG. 10A and FIG. 10B, the golf iron head 5u is provided with a head frame 5 8e composed of a subordinate material, and the head frame 5 8e is formed with its equivalent shot. The spherical area and the opening portion 56e corresponding to the area of the back surface are opened. A face member 53e made of FRP (Fiber Reinforced Plastics: 82254 '6-1232763) is placed in the area corresponding to the hitting surface in the opening 56e. Further, a metal film 57 having a thickness of 100 / Z m or less is formed by a method such as vapor deposition on a region corresponding to the hitting surface of the head frame 58e and a hitting surface of the face member 53e. In the fifth prior art, by forming the face member 53e with FRP, compared with the aforementioned fourth prior art, y can further reduce the weight of the club head, and can further improve the rebounding property of the ball. The formation of the metal thin film 57 on the ball striking surface can relieve the strange appearance of the head frame 58e made of metal material ^ and the face member made of FRp. of

[Problems to be Solved by the Invention] However, the aforementioned prior art has the following problems. In the above-mentioned first prior art raft, although the tactile feel and golf club head when shooting are improved as described above :: ::, it has a low rebound and a short flight distance; Q The coating layer 54 can be easily rotated and imparted. In the above-mentioned second prior art, there is a problem that the quilt is composed of CFRp. There is also a problem in that the coating layer 54 is worn and the hitting performance is lowered.

Furthermore, in the third prior art described above, the back buckle has batting vibration resistance M, so it can improve the feel of the shot, but there is a problem in that it cannot improve the ball's rebound and spin imparting properties. In other words, the third prior art iron head has high ball resilience and spin-giving properties similar to those of a golf iron head made of stainless steel. In addition, the above-mentioned fourth prior art head frame 58d is made of a face member 53d such as stainless steel, and can only be used for caulking. The face member 53d is made of titanium, so the two cannot be welded. Therefore, when the material is fixed on the head frame 5 8 d, there are rust steels and soft irons that cannot meet the sufficient fixed strength 82254 1232763. Although the rigidity is higher than the rigidity, it is difficult to further reduce the weight. Moreover, “Furthermore, the effect of this rebound on hitting the ball is limited. Dull 5. In the previous technique, compared with the aforementioned fourth previous technique, borrowing 536 transfers to sexuality. The work is based on the weight reduction and rotation of the head of the person 4Θ 了 同 同 #-because the face member 53 frame 58e is made of metal, and the head π and species are composed of the ancient soil such as welding cannot be used— π, Mouth and Foot 'clubs 53e and club head frame 5 / French cow solid

Therefore, the fixed strength of the two is low or the jointing material is fixed, and the stone machine and sand are punched. Also, the metal film 57 is easy to be small. Furthermore, there is a problem of lack of durability during the wear of Cl in the system. In the same iron head 5 53e ^ ^ ^ ^ ^ μ. Τ is first formed with a score line on the 53π surface of the face member.喑 # ·· 丰 π + I seek amine 57, so can not fight:… the surface treatment of Dai Temple 'so there is a problem of insufficient spin-applicability. The present invention is in view of the problem of the upper jaw. It is to provide-Shigulf iron heads, which have high impact, #u # &, "high raw and hard turning applicability, high damage resistance and strength, and good durability.

[Summary of the Problem] A method for solving the problem The golf iron head of the present invention has a head frame, and is made up of a genera or gold, and its surface, surface, surface is equivalent to the area of the hitting surface. When there is an opening in the area on the back side, it covers the area corresponding to the hitting surface and is fixed to the head frame. It is made of metal or alloy, and it has a back support part and an arrow. The M, M, and M are in contact with the surface of the rear face of the club face member and are disposed in the head frame. 82254! 232763 Since the towel of the present invention is provided with a head frame having an opening, golf iron heads (hereinafter referred to as "heads" are reduced in labor and center of gravity). Moreover, Part of the structure 彳 'Photograph I is a multilayer structure composed of cup noodles and back support parts, so it can increase the amount of elastic deformation compared to the case of single 厣 g, early layer structure < .Early smoke hunting is based on the amount of elastic deformation, which can prolong the energy conversion efficiency of the cup head to the ball when the ball hits the surface when the ball is in contact with the ball. This can improve the club head | , a ^ ball rebound. In addition, the face part is formed by a metal ^ Γ ^ ^ mouth-to-plate which can be welded to the head frame, and the face part can be formed.

Hunting is fixed to the head frame by welding, while lifting 1〒 belongs to 4 people 44 曰 and 1 疋 ^ dry head &lt; strength. Moreover, the face member is formed of metal or alloy. The main part 2 has the damage resistance of the striking face, and the surface of the cup noodle can be rotated and imparted. According to the "surface treatment, it is possible to improve the impact of the ball. The ends of the aforementioned back support members are preferably embedded in this, which can support the back support hunting and erection material # like a beam, so that <independent of the face: the face Components and back support components of the pole rain soil 1, the fruit has advanced-further improve the rebound of the ball. Furthermore, the ratio of the aforementioned back support members, teeth. The specific gravity of gadolinium is preferably 4.4 or less. By burying this, you can further reach the clubhead and handle of the club head. This will help you to work harder and lower the center of gravity. As a result, the position of the center of gravity and the moment of inertia can be improved, the e-center large cup &gt; member free m ^ ㈣ range, and the design of the club head can be improved. Furthermore, the back support member is described. To bury this, can, good-positive, and heavy Wu 〒 夂 number plate shape, 乂 乂 improve the back support 彳 + t ^ y 3 ball rebound. In addition, the human heart (the amount of elastic cross-section and the number of wrong strikes are different from the combined material, the strength and inverse of the zinc age, the entire club head, and the feel of the handball when the silk coefficient is arbitrary. The user's needs are four feet long, 82254 1232763, and the aforementioned back support member is preferably selected from CFRp (Carb〇n

Reinforced Plastics: carbon fiber reinforced plastics), GFRp (Glass Fiber Reinforced Plastics · glass fiber reinforced plastics),

Reinforced Therm〇 Plastics: a group of two or more materials consisting of thermoplastic carbon fiber reinforced plastics), alloys, A1 alloys, Be alloys, and fiber reinforced metals). In addition, the back surface of the # 述 背 # support member may be decorated. This can increase the commercial value of the head. In addition, since the back side of the back support member can be decorated before the M-head, it is possible to produce 咼 value-added products at low cost. [Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings. The second embodiment is the first embodiment of the present invention. FIG. 1A is a front view showing the golf iron according to this embodiment, as viewed from the face side, and is a cross-sectional view taken along line F, and FIG. 1C is a partially enlarged cross-sectional view of FIG. 1B. As shown in FIG. IA, this embodiment For example, a golf iron head w head frame 2, which is composed of a shaft 2a and a shaft with talented gold. If it is shaped and made of soft iron or iron, humans ca n’t turn it as shown in FIG. 1, an opening is formed in the head frame 2. Department 3, and the entrance is 10,000; on the surface is equivalent to the area of the batting surface "the mouth is facing 浐 昭 #. , And 20,000; the same area is 2d. On the surface facing the framed opening 3 (the entire circle, a step difference of 2 is called. Step multi-tin and 2 you ", the inner surface of the frame k 2e) on the circumference. § to take 2§ is formed on the inner surface 2e as shown in the figure As shown in FIG. 1A and FIG. 1B, a face member 4 and #_ stem ~~ 1 are provided in the Gore, and the inner portion 4 of the opening portion 3 and each support member 5. The shape of the face member 4 is four 82254 -10. -1232763: Plate-shaped, whose ends are fitted in the middle of the step, 'The laser welding p is early to be welded to the head frame 2. Therefore, there are multiple welded portions 6 each connected or april bundle._This The end of the shawl piece 4 is formed with the face, but the I piece 4 is arranged to plug the opening portion 3. The area 2c is arranged to cover the face corresponding to the hitting surface of the head frame 2. The watch's path of 4 is from the outside of Nanlf Iron Head 1. As a result, the surface of club 0 becomes the hitting surface of golf iron head 1. Also, the back

The shape of the teeth K is a quadrangular plate shape, and is located on the back side in the opening 3, which is ## with the face member 4: the face of the hitting surface side of 5 and the back side of the face wheel Face 2: :::: The four sides of the end of the supporting Germany are closed on the entire circumference of the step 2g. Borrow two. As shown in Fig. 10: 'The back support member 5 is sandwiched by the face member 4 and the head frame 2 and the face member 4 is made of a spring steel shaft, for example, 0-running steel, high-strength steel (raglng steel) or m. The recorded sup (spring steel) is formed. The face opening 1M 4 (thickness is, for example, 0.6 to 2.5 mm), and the hitting surface has, for example, four score lines 7 parallel to each other. The direction in which the ruled line 7 extends is the direction in which the text is flat when the ball is hit. The back support member 5 is formed of CFRP, GFRP, CFRTp, Mg alloy, A1 alloy, such as alloy or FRM, which is a material with high specific strength and high elastic modulus. FRM has, for example, aluminum borate (9Ai2032B203) staple fiber (whi ^ er) catenary reinforced alloy. The proportion of back support Shao 5 is below 4.4. If the thickness of the face member 4 is less than 0.6 mm, depending on the material of the face member 4, the strength of the face member 4 may be insufficient. In addition, in order to form a score line (groove) 7 in the face member 4, it is necessary to have a thickness of 0.6 mm or more. On the other hand, if the thickness of the face member 4 exceeds 2.5 mm, the rigidity of the face member 4 becomes too high. 82254 -11-1232763 ′ will reduce the rebound of the ball and reduce the initial speed of the ball. Therefore, the extremity of the face member 4 is preferably 0.6 to 2.5 mni. Next, the manufacturing method of the golf iron head will be described. First, forging or casting soft iron or iron alloy, the head frame 2 is integrally formed. At this time, in the rod culvert frame 2 facing the inner surface 2e of the opening portion 3, a step difference is sometimes formed, or machining is performed to sequentially form the step difference 2 called next, and the back support member 5 is lost to the inside of the opening portion 3. Step difference 2g. On the other hand, C.B.M. Steel, high strength: ㈣raglng steei) or SUP

After forming the desired shape, and performing the required surface treatment on the surface of Yoshimoto 21, 1 / 爻, the face member 4 is produced by forming a score line 7 on the surface. In this temple, the vertical and horizontal dimensions of the back support element 5 are smaller than the vertical and horizontal dimensions of the cup noodle element 4 by more than 1 mm. Secondly, Jiang Yanji ~ ”Ling He # 面 韩 件 4 was fitted to the end of step 2f piece 4 by laser welding or pin cup surface 4 and the bun bundle welding was fused 3 times to the head frame 2. This When making the mouth [5 of the end edge of the 5 twist member 5, the position of the image is more dream than the end of the face member 4; ^ near the inner side 0.5 mm or more, and the configuration is more closely connected. 5Hand support Shao 5 and face member 4. Said 'can prevent the heat from welding to make the back

The generation of gas' causes problems such as pinholes. In this way, the ends are held by the head frame 2 and the face member 4 with ease. System = head of cattle 5. j Yi Chuan Tong Erfu hardcore in the embodiment, because the phase Α, λ twenty eight (, phase * Α golf iron head 丨 of the, points (hereinafter referred to as the face part) # and the hand ball surface foot Shao Dao) you Opening the face part 4 and the back layer structure, so compared with the 4th and 5th inch ## branch part 5 2 main rule skill, the face part of the face of the 6 shape, can improve its elasticity Deformation. Therefore, when the striking surface is in contact with the ball in the early layer structure, the ball's energy conversion efficiency from the cup head to the ball can be extended 82254 -12-1232763 to improve the rebound of the ball. The effect will be explained in more detail below. 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 one sheet, FIG. 2B shows the deformation process, and FIG. 2C shows the face portion 9 is overlapped. In the case of two plates with the same thickness, Figure 2D shows the deformation process. Figure 2A and Figure 20: The plates shown are formed of the same material and their mechanical properties are equal. The plates shown in Figure 2A and Figure 2β The thickness is h, the deformation amount when a certain weight w is applied to the face portion 8 is (5 丨, the thickness of the plate shown in Fig. 2C and the figure is each (⑽), and a certain weight is applied to the face portion 9. The amount of deformation at W is 5 2. The strength of the face portion 8 shown in Figs. 2A and 2B is obtained from the following formula i, and the strength of the entire face portion 9 shown in Figs. 2C and 2D is given by The following formula 2 is produced. In addition, the rigidity of the face portion 8 is obtained by the following formula 3, = 〆τ 吗 4 分 9 + Vs.English based and calculated by the following formula 4, a &amp;. B coefficients (Formula 1) axh \ ^ (Formula 2).

h1 〇χη \

(Eq. 3) 价 -b:

b'xhi ~ 4 ~ (Eq. 4) As for the face of a golf club, it is better to have high strength and low specificity. Therefore, if the face part is to be formed into a two-layer structure: good, but the strength and low rigidity of the face part that is high in the early layer structure of the rigid frame: the value of h to 逑 5 and ό can be used. / 、 Selection satisfies

2 bx /? 2J (Equation 5) —I—2 4 (Equation 6) bxh \ &gt; 82254 13-1232763 The above Equation 5 is derived from the following Equation 7, and the above Equation 6 is derived from the following Equation 8 ( Equation 7) Γ U8) The seven provinces combined the above-mentioned Equations 7 and 8 and the following Equation 9 holds. (Equation 9) 1. Heart W 丨 Therefore, for example, if the structure of h2 = Uxh is formed, and the single-layer structure is formed by forming the # 面 绍 分 to form 2 layers, thereby making the face = 2 'improved strength' and reduced rigidity . (Figure 2D) is greater than the face: the overall amount of deformation 5 2 in the formation of k (refer to the social fruit, the amount of deformation in the ^. Layer structure is shown in Figure 2A). The amount of deformation is large, so the ball can be prolonged when hitting the ball $% # 古 俨 5gd + '^ 回 舁 球 (contact time. This can improve the efficiency of energy conversion to the ball and improve the impact of the ball) Inelasticity. In this case, 'Because the opening 3 is formed in the head frame 2, the talent head is light and its center of gravity position is low. — The soft head or the iron alloy is used to form the talent head frame 2 and the spring is used. The steel forming rod I 忏 4 can weld the face 4 to the frame 2. This can improve the club head compared to the head frame 2 "compared with the situation" by using caulking materials and the like. The strength, durability and reliability are improved. Furthermore, by forming the face member 4 with spring steel, the "damage resistance" of the ball striking surface can be improved, and the required surface treatment can be performed on the surface. Applicability. Also, since the wear 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. Moreover, in this embodiment, the back support member 5 is formed of CFRp, QFRp CFRTP, Mg alloy, A1 alloy, Be alloy, or FRM, and its specific gravity 82254 -14-1232763 is below 4.4, so it can further achieve the head Light weight and low center of gravity. Therefore, the golf iron head according to this embodiment has a wide range of choices such as the position of the center of gravity and the moment of inertia. The design freedom is high. Moreover, by using any combination of strength, Young's coefficient, viscosity The face member 4 and the back support member 5 'with different material properties such as elasticity can arbitrarily adjust the strength of the club head, the rebound coefficient, and the tactile feel when hitting the ball. This can satisfy the user's club head speed and Various user needs caused by differences in touch feeling (hitting feeling) preferences, etc. Next, a second embodiment of the present invention will be described. FIG. 3 shows an example of the paste. An enlarged sectional view of a part of the structure. In the golf club head of this embodiment, the back support portion # 5a is formed by overlapping the middle member η and the back member?. The ends of the middle member 10 and the back member are embedded in Park Head Frame 2 The intermediate member by a W-based CFRP, GFRP, CFRTp,

Mg alloy, A1 alloy, Be alloy or chest. The back part "Mid-back: The side surface is exposed from the club head, and the surface is decorated. The back part 11 can be formed by Ren Yin material, Tian 1 ~, material department, for example, it can be combined with the middle part 10 The material H can be plastic such as epoxy resin or ABS resin (mylonitdle butadiene styrene resin: acrylic meal • Yidi • styrene ethyl resin), but: two, decorative materials for decoration. Also, the entire back support member 5a The structure is the same as that of the above-mentioned! The iron club head will be applied to the other than the above 20. ~ K Nanfu iron head! (Refer to the figure next, I will explain the golf of Taiji, A ·, and other examples. Hardcore

First, forging or casting the scales ★, her A H j, or iron 3 gold to form the head frame 2 in one piece. In the inner face% of the head frame 2, T L forms a step difference 2R2g on the face 2e at this time. On the other hand, 'the surface treatment of the board is performed by using 82254 15-1232763 leftover processing, fine-grain processing, Taisheng, scoring processing, ion plating or coating, or these two combinations' to make the back part u, The step I 'fits the back surface member U into the opening 3 or more. At this time, the m β τ ^ τ plane side of the back member 11 is set. The surface treated with f r is exposed on the back of the head frame 2, its / person, and the intermediate member i 0 are fitted to the member U to overlap. 1. 10,000, 卩 self-differentiated; and on the other side of the back part, 3 factories with Cr—Mo steel and high-strength acoustic 钿 r 〇6: 2 5 (maragingsteel) ^ sup k 4 degrees 6 soil 2.5 mm sheet processing After forming the desired shape, a surface 7 is formed on the surface after the desired surface treatment for making the two-in-one, so as to form the cup noodle member 4. Next, the face member 4 is fitted to the step difference M, and the end of the face member 4 is connected to the head frame 2 with two shots or electronic coupling. &amp; The head frame 2 and the face member 4 are clamped. In this way, the Nanlf iron head in this embodiment can be obtained. ^ In the embodiment, 'because the back support member 5a is composed of the back member U and the middle; 20% of the pieces', the defending part of the golf iron head is made of the face ^ cattle 4, the middle part ㈣ and the back part Layer structure ^ Compared with the first embodiment described above, the elasticity of the defending surface portion can be increased. It ’s also possible to improve the freedom of design of the club head by adjusting the strength of the head, the rebound coefficient, and the tactile sensation during the stroke by adjusting the combination of different materials; Furthermore, the design of the back side of the processing head is decorated by the surface material of the back member η. This can increase the added value of the product: Γ and dry 82254 16-1232763: After the three-side member 11 is decorated, the back part is mounted on the rod "Frame 2", so the decoration can be performed before the head is assembled. Therefore, it is possible to suppress the increase in production and production costs caused by the treatment, and achieve a good design at a low cost. The effects other than the above in this embodiment are the same as those in the first embodiment. [Examples] The following 'is compared with comparative examples outside the scope of the Chinese patent application, and the effects of the present invention will be specifically explained. The test example of Brother 1 is a cross-sectional view of a golf iron head according to the embodiment of the present invention. The picture is a cross-sectional view of a golfer's iron head. First, a golf iron head as shown in H4A and FIG. 4] 8 is produced. As shown in the figure, the structure of the golf iron head 12 according to the embodiment of the present invention is the same as that of the foregoing example. The cup noodles 4 are formed of high tension steel with a thickness of 1.0 mm, and the back support members 5 are By thickness 3 1 ^ 11? 11D1) formed of laminated materials. That is, the total thickness of the face portion 13 is 4 mm. In the golf iron cup 12 shown in FIG. 4A, the FRTP laminated material is a carbon fiber cloth and a polycarbonate sheet. The parent laminated layer is 12 layers. In addition, the head frame 2 is made of Kuren iron S 20C having a carbon (C) content of 0.2% by mass. The reclining angle (丨 ... grabbing) of the golf iron head 12 is 21. The mass of the head is 242g. Also, at tf in FIG. 4B, the golf iron head 14 of the comparative example is formed at a glance from s-20c. The thickness of the face portion 15 of the child iron head 14 is 4 mm. The angle of reclining iron head 14 is 21. The mass of the head is 242g. 82254 -17-1232763 Second, use a golf club with golf iron heads 12 and 14 for actual trial play. The parts other than the head of these golf clubs use the same items. The ball used was B / S NEWING. The weather during the test was sunny and windless. The actual test results are shown in Tables 1 and 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 initial velocity, backspin, stagnation distance, rolling distance, total flight speed (m / s) (rpm), distance (m / s) (yards) (m) (yards) (m) (yards) ㈣ 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 6 39.5 52.1 2470 183 167 18 16.5 201 184 Example 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 Average 39.42 54.9 2648 194.7 178.0 15.4 14.1 210.1 192.1 [Table 2] 82254 -18-1232763

No. Club head velocity of backspin and stagnation distance Rolling distance Total flight speed (m / s) (rpm) Distance (m / s) (yards) (m) (yards) ㈣ (yards) (m) 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 16 14.6 200 183 than 15 38.9 53.9 2090 183 167 20 18.3 203 186 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 17.4 204 187 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 club head speed is equivalent, The ball has an average ball velocity of 5 4 · 9 m / sec, which is 0.9 m / sec higher than the ball velocity of the comparative example (average 54.0 m / sec). The average rotation speed of the counter spin is 2648. The rpm is 162 rpm higher than that of the comparative example (average 2486 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 1 92.1 m) in the embodiment is relatively large. For example, the total flight distance (average 185.7 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 -19-1232763 (average 15.2 m) of the comparative example. In addition, in the embodiment of the present invention, the shooting of the ball and the car is more than the car. In general, when using a driver, the muzzle speed increases by 1 m / sec to the right, and the dead space increases by 5 to 10 yards. The same goes for golf iron heads.

㈣ Make the thickness of the part (face) of the ball hitting face in the range of 2 to 6 mm: make 5 iron heads. The face part is composed of two parts of the face part and the = # support screw member, and the total thickness of the two pieces depends on the rod and the show. That is, although the structure of these club heads is the same as that shown in Figure 4-8

Use &gt; 4 -rc, ^ NT 盥洗 # 毛, &lt; Structure is similar, but the face plate and the back support plate ^ The dimensions shown in Fig. 4 are different. Table 3 shows the four-face member, the back support member, and the total plate thickness of the head used in the second test example. Hit a golf club with a temple head and measure its muzzle speed. The ball hitting system has two types of head speeds of 30 m / s and 40 m / s. [Table 3] Examples

No. Total plate thickness of the back support of the face part's plate thickness' —----—- plate thickness (mm) plate thickness (mm) Γγπτπ ^ 1 1-2 22 -----—. 1 2 — — ~ -—___ 3 23 ----— 1 3 4 _24 1 4 5 25 1 5 6 Figure 5 is a graph showing the effect of the stiffness of the face on the initial velocity of the ball. The horizontal axis is the stiffness of the face. , The vertical axis is the initial velocity of the ball hit. Horizontal axis of Figure 5

82254 -20- 1232763 ^ E x t \ kg · mm), where E (kg / _2) is the elasticity of the material forming the face part, and t (mm) is the thickness of the face part. The value is an index representing the magnitude of rigidity. In addition, the solid circle (φ) in the figure shows the 4 test results when the club head speed is Gamma / second, and the black triangles in the picture (^ ^, Tie Zhuan are not the tests when the club head speed is 30 m / s). Results. In the figure, the number is the total plate thickness of the cup noodles. As shown in Figure 5, the thinner the plate thickness of the face portion, the less rigid the face portion is. As the #face portion becomes softer, the amount of elastic deformation changes. Large, so the rebound of the ball increases the initial velocity of the ball. As a result, the flight distance of the ball increases. The muzzle velocity increases by 1 m / s, and the flight distance of the ball increases by 4.7 claws. [Effect of the invention] As described in the above, The invention uses two plates of a face member and a back support member to form a four-point face of a golf club head. This reduces the rigidity of the face portion and lengthens the 蛀% n soil when hitting the ball. — The contact time of the ball, which improves the rebound of the ball. Therefore, you can increase the initial stroke of the ball. ^ Lengthen the limp distance. In addition, because the face parts are made of metal or conjunctive shape +. 口 i , So its damage resistance and ball rotation are good, and can choose 3, 2 and 2 It is welded to the head frame, so a high-strength head with good durability can be obtained, and the iron head with the same meaning can be obtained. [Simplified illustration of the drawing] FIG. 1A shows the dry iron of this embodiment. Dry head (viewing the front view from the face side, Fig. 1B is a sectional view taken along line F-Dm-F in Fig. 1A, and Fig. 1C is an enlarged sectional view of a portion of Fig. 1B. Figs. 2A to 2D are display rods Face beast eight ,,

Schematic diagram of the deformation process of four blades. Figure 2A shows the face part 8 formed by a sheet of material. Figure 2B shows its transformation 82254 * 21-1232763. Figure 2C shows the face part 9 series overlap. In the case of two plates with the same thickness, the deformation process is shown in FIG. 2D. 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 sectional view showing a golf iron head according to an embodiment of the present invention, and FIG. 4B is a sectional view showing a golf iron head according to a comparative example. Fig. 5 is a graph showing the influence of the rigidity of the 颏 τκ 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. Figure 6A and Figure 6B show the first! 6A is a back view seen from the back side, and FIG. 6B is a cross-sectional view taken along line a-A of FIG. 6 in the prior art golf iron head. FIG. 7A and FIG. 7B are views showing a golf iron head of the second prior art, in which FIG. 7A is a rear view seen from the back, and FIG. 7B is a cross-sectional view taken along line 6-B in FIG. 7. 8A and 8B are views showing a golf iron head of the third prior art, in which FIG. 8A is a back view seen from the back side, and FIG. 8B is a cross-sectional view taken along line [_ [] of FIG. 9A and 9B are diagrams showing a golf iron head of the fourth prior art, wherein FIG. 9A is a back view seen from the side of the face, and FIG. 9B is a cross-sectional view taken along line D-D of the present eight. 10A and 10B are diagrams showing a golf iron head of the fifth prior art, in which FIG. 10A is a back view seen from the back side, and FIG. 10B is a cross-sectional view taken along line E-E of FIG. 10A . [Illustration of Representative Symbols of Drawings] 82254 -22- 1232763 Head Area 1: Golf iron head 2: Head frame 2a: Shaft 2b: 2c ·· Area equivalent to the hitting surface 2d: Equivalent to the back Zone 2e: inner surface 2f, 2g: step 3: opening portion 4: face S 5: back support member 6: welding portion 7: score line 8, 9: face portion 10: middle member 11: back member 1 2, 1 4: Golf iron head 1 3, 1 5: Face part 5 1 a, 5 1 b, 5 1 c, 5 1 d, 5 1 e: Golf iron head 5 2a, 5 2b, 52c: Head Body 53a, 53e: Face member 54: Covering layer 55: Back member 56d, 56e ... Opening 57 ... Metal film 58d, 58e: Head frame a, b: Coefficients hi, h2: Thickness W: Weight deformation Volume 82254 -23-

Claims (1)

No. 9¾ ^ ^ 00873 _ file for June) The Office of the People's Republic of China requested a replacement of the patent fan park (pick up and apply for a patent fan park in 1993:. Two types of golf iron heads, which are characterized by: head frame, which consists of / It is composed of σ or σ, and its surface is equivalent to the hitting surface and phase: there is an opening in the back area; the face part covers the aforementioned area equivalent to 2 faces and is fixed to the aforementioned club head by dazzling connection ^ A frame made of metal or an alloy; and a back support member that is disposed in contact with the face side of the face member and is disposed in the head frame, wherein the face member and the back support member are independent from each other Deformation. According to the golf iron head of item i of the patent, g, where the end of the aforementioned support member is embedded in the head frame. = According to the golf iron head of item i of the 4th patent scope, where The weight ratio of the supporting pieces in the previous month is less than 4.4. The golf iron head of item 丨 in Bei Kangshen's patent scope, wherein the aforementioned $ θ # 支 枝 柄 件 is formed by overlapping a plurality of plates. 5. According to the application Patent Scope 4 Golf A club head in which the aforementioned 6 back support members are formed by overlapping 2 to 5 sheets. According to the golf iron club head of claim 1 in the patent scope, the aforementioned back support members are selected from the group consisting of CFRP, GFRP, CFRTP, Group of Mg alloy A1 gold, Be alloy &amp; FRM, or two or more materials. = Golf iron head according to item 1 of the patent scope, where the back side of the aforementioned 8 back support members There is a decorative treatment applied to the surface. 2 According to the golf iron head of claim 1 in the scope of patent application, the aforementioned application treatment is composed of etching treatment, fine grain processing, coating treatment, 1232763 sub-coating and coating. According to one of the above-mentioned methods or two or more methods, according to item 1 of the Nanlf iron head, the head frame and the face member are formed by laser welding or electron beam welding. 10. The thickness of the face part according to item 1 of the patent application range is 0.6 to the direction of the iron head, which is 2-5 ram. 82254-930609.doc