TW455498B - Iron golf club head, iron golf club, and iron golf club set - Google Patents

Abstract

An iron golf club head (1) comprising three principal axes of inertia (I1, I2 and I3) passing the gravity center thereof, wherein an angle θ between the axis I1 on which a moment of inertia about a principal axis of the inertia among three principal axes of inertia becomes maximum and the normal vector (101) of a face plane (3f) passing the gravity center thereof is at least 10 degrees and not more than 90 degrees.

Description

455493

V. Description of the invention (i) Technical scope_ This invention relates to general golf irons a and golf irons. In particular, it is about a golf iron head that can effectively fly golf irons, which are different from each other, a two-two iron and a golf iron group. BACKGROUND OF THE INVENTION A golf club head system in consideration of an inertial ellipsoid is described in Japanese Unexamined Patent Publication No. 5-57034. The golf club heads described in this publication are those that minimize the increase of the golf club head by reducing the weight distribution in the direction of the inertial principal axis. ΐ 之 增 Also ‘Kai 9-149954’ golf club head with an increased angle when it is reflected on a flat surface. The goal distance and direction of the golf iron iron is β because the direction and flight distance of the ball are not very good. It is shown that the ball with the inertia main draw ^ stability of the flight distance and direction of flight is the purpose of correctly catching the attacker's ball. This' stabilization time due to uneven dot positions, will not do so in terms of leveling An object of the present invention is to provide a golf iron head, a golf iron, and a golf club set whose flight distance and directionality are stable. SUMMARY OF THE INVENTION There is no method of considering the inertia main axis and the best striking surface in the conventional technology.

Page 4 V. Description of the invention (2) An article formed by a line vector at an angle. The ellipsoid of a golf club head with a complicated shape is expressed, and the angle formed by the inertia principal axis and the optimal 4 'moment with an equivalent inertia is set to be large, whereby the normal of the striking surface The vector moment becomes larger, which can effectively reduce the inertia τ in the playing direction of the ball 脱 脱 the distance of the trip. However, the inertia moment around the iron shaft of the golf ball or the projection of the inertia main shaft is generally difficult to take into account. However, the normal vector of the main draw and the best strike surface is not considered. : General 'The so-called normal vector means relative to a certain Ϊ. The direction 篁 ’contains the vector in the plane,…, the vertical direction at zero = the product of the inner product of the 34 normal vector, etc. The inverse of the square root of U # 肖 之 丝。 Also, the size of the moment of the glazed bucket will increase. That is, the smaller the inertial ellipsoid, the smaller the moment of inertia when the force is exerted from one direction. The direction of the center of gravity of the circle is expressed by the area of the ellipse cut by the inertial ellipsoid. When the plane of the ',,, and line vectors is cut off, that is,' the smaller the aforementioned area is, the smaller the aforementioned area is, the greater the moment of inertia in its direction is. The surrounding moment of inertia is the largest Φ ^ the center of the inertial spindle hitting surface of the two inertial spindles ^ 4 and the center of the best striking surface (the best hit is because of the relative force The angle formed by the Λ vector is increased. The position is somewhat different, and the moment of inertia of β is larger, so even if you play, you can catch the flight of the sphere. 5. Explanation of the invention (3) Distance and direction By setting the angle formed by the inertial main axis of the golf iron head and the normal vector of the best striking surface to be larger, the present invention can provide a golf iron head with a more stable flight distance and directionality. The inventor of the invention has made the following conclusions after conducting various reviews on the flying distance and flying direction of the golf club. That is, although some improvement has been implemented in the above-mentioned conventional technology, it is not for the inertial ellipsoid. The projection on the plane is to compensate for its three-dimensionality, and to achieve an effective improvement effect by specializing a certain axis of the inertial main axis. Therefore, in the present invention, it is known by setting The three-dimensional tilt of the preferred inertial main shaft of the golf club that has not been disclosed in the technology and the control of the tilting cypress provide a golf club head that can effectively suppress the unevenness of the flying distance and the direction of the golf ball when the ball is uneven. At present, golf club heads are mainly designed in consideration of the best hitting area, and there is a case where the moment of inertia of any axis horizontal to the heel direction is the best hitting area. However, it does not Considering the orientation of the inertial ellipsoid existing in = space. R π, one person stunned in the present invention, by normalizing the normal surface of the best striking surface of the center of gravity of one of the inertia spindles of the inertial principal axis that intersects the golf ball perpendicular to each other. Vector comparison rod formed by the golfer: the golf club with high flight distance and directionality = high

45 54 9 B V. Description of the invention (4) It is easy to turn around the axis with a small moment of inertia, so it is the most difficult to rotate in the direction of the axis 13 relative to the axis with the smallest moment of inertia. According to the above knowledge, the golf iron head of the present invention has three inertia main shafts passing through the center of gravity. Among the three inertial main axes, the angle formed by the axis with the largest moment of inertia around the main axis of inertia and the normal vector passing through the center of gravity's best hitting surface is 6 10 degrees or more and 90 degrees or less. It is preferable that the angle Θ is 30 degrees or more and 90 degrees or less. More preferably, the angle < 9 is 50 degrees or more and 90 degrees or less. Furthermore, it is more preferable that the angle Θ is set to 70 degrees or more and 90 degrees or less. θ 'The golf iron system according to the present invention includes the above-mentioned golf iron head and a shaft body connected to one end of the golf iron head. The golf iron set according to the present invention includes the identification ^ number ^ the same ^ golf irons' and these golf irons have a plurality of clubs ΐΙίΪ iron heads and one end are respectively connected to each golf iron pattern Brief description. Fig. 1 is a seat view of a Gore A ductile iron head according to the present invention. Fig. 2 is a schematic illustration of a conventional master of a golf iron head according to the present invention. Fig. 3 A, B, and C are schematic conceptual views of the high side of the present invention. Ductile iron & head cut ellipse Figure 4 shows the inertial spindle of the present invention. Conceptual illustration of the inclination angle 4554 V. Description of the invention (4) It is easy to turn around the axis with a small moment of inertia, so it is the most difficult to rotate in the direction of the axis I3 relative to the axis with the smallest moment of inertia. According to the above knowledge, the golf iron head of the present invention has three inertia main shafts passing through the center of gravity. Among the three inertial main shafts, the axis with the largest moment of inertia around the inertia main shaft and the normal line of the best striking surface passing through the center of gravity. The angle θ formed by the vector is 0 ° to 90 °. It is preferable that the angle Θ is 30 degrees or more and 90 degrees or less. More preferably, the angle Θ is set to 50 degrees or more and 9 G degrees or less. Still more preferably, the angle 0 is 70 degrees or more and 90 degrees or less. Further, the golf iron head according to the present invention is connected with one end to a plurality of golf irons according to the golf iron according to the present invention, and the golf iron head described above and a shaft body of a club head. The iron club includes a shaft body of the golf golf club head described above. The club set includes a plurality of golf irons having different identification numbers, and a plurality of square ends are successively connected to the coordinates of each golf iron. The schematic diagram of the inertia master cypress 1 is the golf iron of the present invention. The second diagram is the concept of the golf club irons of the golf club. The elliptical main shaft of the ellipse is cut off by two degrees. Figures A, B, and C are conceptual diagrams of the aspects of the invention. Fig. 4 is an inertia diagram of the present invention.

455498 5 Description of the invention (5)-Figure 5 shows the intention to divide the golf iron related to the present invention. Fig. 6 of the state of the τ head is a high map of Embodiment 1 according to the present invention. Three-dimensional view of the big and bad weave. Figure 7 is a perspective view of a golf iron head in accordance with other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1 club head la main body 2 club body insertion part 3 best hitting face 3b rear part 3c figure center 3f best hitting face 4 XY plane 5 Y2 plane 6 plane parallel to YZ plane 5 7 virtual cutting line 8a, 8 b Weighting member 10 Inertial ellipsoid

Page 8 45549 ^ V. Description of the invention (6) 60 Ground 61 Junction 62 Crossing line 70 Shaft 80 Golf iron 101 Normal vector of the best hitting surface 102 Angle 0 is in the range of 30 degrees 103 Angle 0 is 60 degrees The range al-i2 cutting part G center of gravity I, '12' 13 The best form of implementing the invention of the inertia main axis In the first figure, the axis passing through the center of gravity g perpendicular to the ground 60 is set as the z-axis. The line 62 that intersects the center η of the center of the figure 3c of the best striking surface 3c and the ground 60 is parallel and perpendicular to the z-axis and passes through the center of gravity G as the X-axis. The axis perpendicular to both the X-axis and the Z-axis and passing through the center of gravity G is set as the Y-axis. As shown in Figure 2, the line of intersection with the center of the figure 3c of the best strike surface 3f and the ground is parallel and passes through the normal direction of the surface G through the center of gravity G is set to f (l, m, n) T and calculate the following vectors. fi〇i »mi, n,) T = f xZ (〇, 〇, 1) τ

f 2 (“,, η2) τ = f] X f (π3, n3) T = f, X ^ 2 where X represents the outer product.

45 54 9 S 89110116 ___Case No. V. Description of the Invention (7) Secondly, as shown in Figure 3A, the line of intersection with the ground on the center of the best strike surface 3f and the ground shall be parallel and pass through The axis is set to ^ axis. And the line parallel to the center of the best hitting surface 3f and the axis perpendicular to it is set to / 3 axis. The axis perpendicular to the α axis and the non-axis is set to 7 axes. When the coordinate system of α, stone, and r is transformed into the coordinate system of X, Y, and Z, it is expressed by the following formula. Χ =! Ι · α +12 · Ling Shi 13 · r Y = roi · a + m2 · / 9 + m3 · γ ... (2) Z = n [· α + n2 · / 5 + n3 · γ in This 'sets A !, A2, Ag as the inertia moments related to the X, Y, and z axes, and sets a | 2 as the inertial product related to the YZ plane and the χζ plane, and sets' to be related to the γζ plane and the XY plane. The inertial product, and when A23 is set to the inertial product related to the χζ plane and the χγ plane, the following relationship can be obtained. Α, · χ2 + Α2 · ΥΗΑ3 · ZnΗ2 · Α12 · X · Υ + 2 · Α13 · X · Zn + 2. △ 23 · Υ · Zn = 1… (3) The ellipse system represented by formula (3) is called Inertial ellipsoid. This is the magnitude of the inertial impedance in each direction. When equation (2) is substituted into equation (3) and the term of r is set to 0, equation (4) can be obtained on the cut ellipse. (A! Li2 + A21DJH A3 njH A12 li nii + A13 1j ^ + Aagin, ^) a2i (A) 122 + A3 m22 + A3n22 + A12 l2m2 + A13 l3n2 + A23m2n2) + (A, lj 12 + a2 nij ra2 + A3 n, n2 + A121, m2 + A, 212 rai + ^ I3 lt n2 + ^ i3 ^ n, + Α23Π1, n2 + A23m2n1) a β = \ --- (4) The size of this section is shown The ease of rotation of the object on this surface indicates the magnitude of the inertial impedance. The above-mentioned cut surface indicates that

2075-3218-PFLptc Page 10 455498 5. Description of the invention (8) The inertial impedance in the vertical direction of the plane. In addition, as shown in FIGS. 3A to 3C, it is clear that the shape of this cut surface can be formed into a flat ellipse because it is a cut surface of a three-dimensional inertial ellipsoid. The following describes specific implementation modes of the present invention. The golf iron head, the golf iron, and the golf iron set according to the embodiment of the present invention include the following elements as constituent elements. Figure 4 reveals the angle 6 »formed by the axis with the largest moment of inertia of the three inertial principal axes around the center of gravity and the normal vector 101 passing through the optimal striking surface of the center of gravity G. The solid line 102 is a range where the disclosure angle < 9 is 30 degrees. The solid line 103 indicates a range where the angle θ is 60 degrees. As shown in Figure 8, 'On the golf iron head, the three inertia major axes I passing through the center of gravity G], "and I3, the axis L with the largest moment of inertia around the inertia major axis and the best striking surface passing through the center of gravity G The angle 0 formed by the normal vector 3m of 3f is 10 degrees or more and 90 degrees or less. It is more preferable that the angle θ is 30 degrees or more and 90 degrees or less. 50 degrees or more and 90 degrees or less. It is more preferable that the angle 0 be 70 degrees or more and 90 degrees or less. G ^ Also, the golf iron 80 according to the present invention is equipped with a golf iron head 1000 and One end is connected to the shaft 70 of the golf iron head 1 described above. The golf iron set according to the invention is provided with a plurality of golf clubs with different identification numbers. The golf irons 80 series It includes the above-mentioned golf iron head 1 and a plurality of shaft bodies 7 respectively connected to each of the golf iron heads 1 at one end. The golf iron head according to the present invention will be described with reference to the drawings.

Page 455498

5. Description of the invention (9) + 5 is a perspective view of the golf club head divided to set the direction of the inertial main axis =. That is, as shown in FIG. 5, the golf iron head 1 is divided into a shaft insertion portion 2 and a best hitting face ^, and then the center of the figure 3c passing the best hitting face 3 and the plane 4 and the plane 5 The imaginary cut surface 7 cuts the golf iron 3 into a quadrant shape. In addition, the golf iron head is cut with a plane 6 and a virtual cutting line 7 passing through the γ-axis center of the γ-axis center of the four-sectioned member, and the formed nine-sectioned members are represented by a to I, respectively. . Each component divided into nine is divided into two equal parts on the optimal striking surface 3 f side and the rear lb side with an imaginary cutting line 7, and is divided into 18 components in total. The respective component parts are represented by al to i 2. Fig. 6 shows a golf iron head according to Embodiment 1 of the present invention. That is, part c] and part i 1 of the golf iron head are provided with a weighting member 8a (consisting of a stainless steel alloy, a button alloy, or a tungsten alloy) composed of a metal having a higher specific gravity. Thus, the angle θ formed by the axis of inertia around the main axis of inertia being the largest and the normal vector of the best strike surface 3f is as shown in Table 1, and can be set as the objective value of the present invention. Table 1 shows the angle formed by the inertia main axis L and the normal vector of the optimal striking surface 3f. Table 1 Known height _ golf ball defending iron selection angle of golf ball in Example 1 0 8.9 degrees 12.6 degrees

45 54 98 V. Description of invention (ίο) Head. .μ 11 ^ t ^ ττ ^ δ Hypothesis of plane 5 U & Α center 3e χγ plane 4 Niu will cut to the golf club head 1 to form a quadruple joint u and a member that passes through the quadruple ^ plane 5 in the center of the γ axis ^ flat: ^ virtual hypothetical cutting plane 7 of plane 6 cuts the golf iron head 1 and divides it into J. Then, the divided components are cut in half by the imaginary cutting surface 7, and each component is used as a component on the best striking surface 3f side and a component on the rear duty side. In this way, the golf iron head 1 is divided into a total of 18 components, and each component is set into parts al to i2. A weighting member 8b (consisting of a lithium alloy, a beryllium alloy, an aluminum alloy, or a titanium alloy) composed of a metal having a relatively low specific gravity is disposed on the portion al, the portion dl, and the portion h2. As a result, the angle 6 of the principal axis of inertia around the inertia main axis and the normal vector of the best striking surface 3, as shown in Table 2, can be set within the scope of the purpose of the present invention. Table 2 also shows the angle formed by the inertial principal axis I! And the normal vector of the optimal striking surface 3f. Table 2 ----- Known golf irons Example 2 Shaft irons 8.9 degrees _ 32.8 degrees

Also 'About the method of disposing the weighting members 8a and 8b composed of a metal with a lower specific gravity or a metal with a lower specific gravity' can be used on a golf iron head] page 13 455498 V. Description of the invention (11) The head body la A recessed portion 'is formed, and the weighting members 8 & and 8b are fitted into the recessed portion. In addition, the four parts are welded or coated and welded to increase the weight of the members 8a and 81). Table 3 shows the results of performing a game using the golf irons of Example 1 by 10 ordinary intermediate people. The flight distance of the unknown club is more stable. The flight distance of the club of the present invention is more stable. 2 7 1 The golf iron head of the present invention 1 has the largest moment of inertia around the inertia spindle among the three inertial spindles. The angle formed by the main axis and the normal vector passing through the optimal striking surface 3f of the center of gravity is set to be large. The major axis of inertia around the inertia major axis of the golf iron head 1 is most oriented toward the flying ball line of the sphere, and is cut when the inertial ellipsoid 1 is cut in a plane parallel to the optimal striking surface passing through the center of gravity. The area of the ellipse has roughly become the largest. Generally, the length of the major axis of the inertial ellipsoid 10 is expressed by the inverse of the square root of the magnitude of the moment of inertia around its axis. That is, the smaller the inertial ellipsoid, the larger the moment of inertia. The magnitude of the moment of inertia in the case of a unidirectional force can be expressed by the area of the cutting ellipse when the inertial ellipsoid 10 passes through the center of gravity G and the direction of the force is cut by a plane that is a normal vector. That is, the smaller the area is, relative to its mm. Page 14 45549¾ V. Description of the invention (12) The greater the moment of inertia in the direction β To reduce this area, the moment of inertia around the inertia spindle among the three inertia spindles must be maximized The angle formed by the principal axis and the normal vector of the plane parallel to the center of the figure 3c of the best striking surface 3f is set to be larger. In other words, the moment of inertia with respect to the direction of force application becomes large, so even if the position of the ball is slightly different, the flying distance and direction of the sphere can be easily captured by the player's purpose. In addition, the three axes that vertically intersect in space generally do not form a value greater than 90 degrees for a vector. Therefore, the angle formed by the axis with the largest moment of inertia around the inertia axis among the three inertial axes and the normal vector of the best strike surface. Θ is more than 30 degrees and less than 90 degrees. 'The more preferable value is more than 50 degrees and less than 90 degrees. The more preferable value is more than 70 degrees and less than 90 degrees. In this way, the moment of inertia with respect to the direction of the force is increased, and the effect is large. Better. According to the golf iron head 1 of the present invention, as described above, the moment of inertia around the main axis of inertia is the normal vector of the interface between the axis with the largest inertia and the center of the best strike surface 3f (the normal of the best strike surface 3f When the angle formed by the vector is set to be larger, the flight distance and directionality during playing can be more stable. In addition, the golf iron set of the present invention can make golf by making the angle formed by the axis of the axis of inertia around the inertia main axis the largest and the normal vector of the interface on the center 3c of the best hitting surface 3f. The inherent flight distance of each golf club with the identification number in the club set is more stable, and the direction of the golf ball can be more stable. Therefore, a golf club set with a sense of stability for golf players can be provided. According to the present invention, the Shaft iron head is made by surrounding the inertia main shaft.

455496 V. Description of the invention 03) The inertia of the inertia vector is more secure, such as the axis and degree of the Gore. The moment is the most fixed. The fixed thing is the Gore. As mentioned above, the ductile iron is the best. Hit a large shape and a large axis and angle for comparison. It can be used for the golf club to defend the golf club. According to the invention, the drawing of the face on the club set can be used to play the best play. The set uses Yuguer to make the flying distance on the center of gravity hit the center of the hit surface into a flying ball. The golf ball is dry and can also be used. The normal distance from the joint surface around the main shaft of the golf ball iron head and the normal line distance and the direction of the joint surface from the directional head. The directional head is installed with the body and the grip is different from the identification number, and the moment of the golf iron is the largest vector. The formed angle is a more stable use field in the industry. The present invention can be used in the field of high-end golf club heads, < , And golf ball irons and

Claims (1)

455498 1. A golf iron head (丨), which has three inertial main axes (I " 12, 13) passing through the center of gravity. Then, among the inertial main axes (, ", 丨 3), the moment of inertia around the inertial main axis is the largest. The angle formed by the axis (1 丨) and the normal vector (101) of the best striking surface (3f) passing through the center of gravity is 0 or more and 10 or less. 2. If the scope of patent application is the first The golf iron head of the item, wherein the aforementioned angle 0 is 30 degrees or more and 90 degrees or less. 3. For the golf iron head of the item 1 of the patent application scope, wherein the aforementioned angle 0 is 50 degrees or more and 90 degrees or less. 4. For example, the golf iron head of item 1 of the scope of patent application, wherein the aforementioned angle 0 is more than 70 degrees and less than 90 degrees. 5. —A kind of golf iron, including: Golf iron head (1), such as the scope of patent application No. 1 And a shaft (70), one end of which is connected to the golf iron head (1). 6. A golf iron set 'equipped with a plurality of golf irons (80) with identification numbers different from each other' These golf irons (80) are The patentable scope of an application is described in paragraph 1 of Golf iron head (1) and respectively connecting one end to the iron golf head (1) of the shaft (70).