JP2005278950A - Golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club head which can improve the stability of the direction of hitting the balls by stabilizing the swing. <P>SOLUTION: The golf club head has a hollow outer shell structure which has the face part 5 for hitting the balls. A weight concentration part 10 with the mass thereof larger than that of the peripheral part extended along the longitudinal direction thereof is formed at least at the crown part 3a of the body 1 of the head making up the golf club head. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a golf club head.

Conventionally, a golf club head in which a weight body is arranged inside a hollow head to improve the directionality of a hit ball is known. For example, Patent Document 1 discloses a golf club head in which a weight body is installed at a position close to the shaft axis behind the crown portion so as to set the center-of-gravity angle of the head within a predetermined range (30.5 to 35 degrees). Has been. According to such a golf club head, since the face surface is easily rotated around the shaft axis during a swing, the head is also easily returned, and an effect of preventing slicing can be obtained. Patent Document 2 discloses a golf club head in which a weight body is installed in the vicinity of a sweet spot on the face side. According to such a golf club head, it is possible to make the golfer at the time of swing sense the position of the sweet spot and the orientation of the face by concentrating one heavy object, and it is easy to hit the ball at a position close to the sweet spot. An effect is obtained.
JP 2002-113135 A JP 2002-219199 A

  By the way, as shown in FIG. 1, the golf club swing enters the backswing from the “address” (the trajectory of arrows A and B), reaches the “top of swing”, and moves to the downswing (the trajectory of arrow C). Subsequently, after “cock release” and “impact” (trajectory of arrow D), a follow-through is entered and “finish” is achieved. In this series of movements, when the backswing from the address, the face turns to the front when the grip reaches the player's waist, and when the downswing from the top position, the face turns to the front until the waist and impact from the waist. When the so-called cock is released, impact is made while matching the direction of the head trajectory and the direction of the face. That is, as shown in FIG. 2, in the trajectory indicated by the arrow D in FIG. 1, the player operates the shaft so as to face the front at the ball position while rotating the shaft axis X along the swing plane SP. doing.

  As described above, the direction of the head when releasing the cock is important in order to finally direct it to the target direction, but inertia force acts on the head during the swing, and in particular, the conventional technology as described above. In the structure of the head, since the weight body is concentrated (dotted), the inertial force peculiar to the weight body is generated by the scattered weight body.

  The conventional technique described above corrects the orientation of the face in a series of swings, but does not consider the inertial force that acts on the head when the cock is released. In other words, it is necessary to correct the inertial force generated by the weight body concentrated at one point by applying some force. In the orbit of arrow D, the inertial force is corrected to follow the direction of the swing plane by kneading the wrist. There is a problem that it is necessary to align the face to the front in line, which is inferior in antegrade performance. As a result, in the conventional technology, the swing tends to become unstable due to the operation of suppressing the inertial force generated by the weight body concentrated on one point in the trajectory of the arrow D, and the technique is required, and the stability in the hitting direction ( There is a problem that the accuracy is inferior.

  The present invention has been made based on the above-described problems, and an object of the present invention is to provide a golf club head capable of stabilizing the swing and improving the stability in the hitting direction.

  In order to achieve the above object, a golf club head according to the present invention has a hollow outer shell structure having a face portion for hitting a ball, and extends along at least the crown portion of the head body along the front-rear direction. A weight concentration part having a larger mass than the part is formed.

  According to the golf club head having such a structure, the weight concentrating portion is formed to extend in the front-rear direction at least in the crown portion, and when the head main body is considered, the weight body is concentrated and arranged at a specific position. It has not been done. In other words, the weight concentration portion is formed to extend in the front-rear direction, which is the direction along the swing direction, so that in the series of swings, especially when the cock is released, the rotation with respect to the shaft axis remains as it is in the inertia of the head in the swing plane direction. Since it becomes easy to follow the force, the swing can be stably performed without performing a kneading operation, and the face surface can be easily aligned in the hitting direction. As a result, the swing is stabilized, variation in hitting points at the time of impact is suppressed, and the hitting direction is stabilized.

  According to the present invention, when the cock is released during the downswing by the weight concentrating part formed extending in the swing direction, the rotation with respect to the shaft axis can be easily performed in the swing plane direction as it is. There is no need to perform an operation, and a golf club head is obtained in which the swing is stable and the directionality of the hit ball is stable.

Hereinafter, embodiments of a golf club head according to the present invention will be described.
3 to 6 are views showing a first embodiment of a golf club head according to the present invention. FIG. 3 is a longitudinal sectional view at a position passing through the center of gravity of the head, and FIG. 4 is a transverse sectional view on the face side. 5 is a plan view, and FIG. 6 is a back view.

  A head body 1 of a golf club head (hereinafter referred to as a head) according to the present embodiment includes a rear member 3 including a crown portion 3a, a back portion 3b, a sole portion 3c, a toe portion 3d, and a heel portion 3e, The front member (face portion) 5 is welded to or integrated with the rear member 3. An opening 5 a is formed in the face portion 5, and the head body 1 has a hollow outer shell structure by fixing the face member 6 thereto by welding, press-fitting, adhesion, or the like.

  The head body 1 of the present embodiment is integrally formed by casting except for the face member 6 among the outer shell members, and the face member 6 formed by punching or the like is fixed to the opening 5a. It is configured. In this case, the portion of the rear member 3 and the front member 5 excluding the face member 6 is made of, for example, stainless steel, stainless alloy, titanium, titanium alloy, or the like, and the face member 6 is made of, for example, a titanium alloy having a high specific strength. Etc. are constituted. A shaft fixing hole 4 is formed in the crown portion 3a of the head 1, and a shaft 7 made of metal or FRP is attached to the hollow portion.

  A weight concentration portion 10 is continuously and integrally provided on the crown portion 3a, the back portion 3b, and the sole portion 3c. The weight concentrating portion 10 is a portion that concentrates a larger mass than the peripheral portion thereof, and does not concentrate the weight at a specific point, but the front-rear direction of the head body, that is, the direction along the swing plane (this In the embodiment, the heavy object is provided with directionality by extending in a direction perpendicular to the face portion 5. In the present embodiment, as shown in the figure, the rib is configured to protrude toward the center of the hollow portion.

  In this case, the weight concentrating portion 10 is preferably formed at a position passing through the center of gravity G of the head body 1 so as to obtain the most stable antegrade operation effect at the time of swing, and has a predetermined thickness and height. It is formed. Moreover, it is preferable to form the weight concentration part 10 in the back side rather than forming over the crown part 3a and the whole front-back direction of the sole part 3c. That is, by making the rear side of the face part 5 just thin, the rear region of the face member 6 is easily bent at the time of hitting, the face deflection amount is increased, the resilience performance is improved, and the flight distance is improved. It becomes possible to do.

  Specifically, as shown in the drawing, the region R1 in which the weight concentration portion 10 configured in a rib shape is not formed is 5 mm from the inflection point P1 defined as follows so that a sufficient deflection region can be secured. It is preferable that there is more. Further, as shown in the figure, when the weight concentration portion 10 is continuously formed also on the sole portion 3c via the back portion, the region L1 where the weight concentration portion 10 is not formed is the deflection region as with the crown portion 3a. Is preferably 5 mm or more from the inflection point P3 defined as follows.

  And the formation length (R2 shown in the figure) of the weight concentration portion 10 in the crown portion is preferably R / 3 or more, where R is the length in the front-rear direction of the crown portion 3a. That is, by forming the weight concentrating portion 10 for such a length, the arrangement of the masses along the hitting direction becomes clear, and the rotation of the shaft shaft during the swing can easily follow the inertial force of the head. . For the same reason as the crown portion 3a, the formation length of the weight concentration portion 10 in the sole portion 3c (L2 in the figure) is L / 3 when the length in the front-rear direction of the sole portion 3c is L. It is preferable to make it above.

  Note that the definition of the length R in the front-rear direction of the crown portion 3a is a region where the radius of curvature of the crown portion 3a is larger than 80 mm when the cross section passing through the center of gravity G shown in FIG. Is specified by the distance between the inflection points P1 and P2. Similarly, the definition of the length L in the front-rear direction of the sole portion 3c is a region where the radius of curvature of the sole portion 3c is larger than 80 mm when the cross section passing through the center of gravity G shown in FIG. It is specified by the distance between the inflection points P3 and P4.

  The above-described weight concentration portions 10 may all be formed with the same thickness and height, but the height may be partially changed or the thickness may be changed. For example, as shown in the figure, the thickness W1 of the predetermined region 10a on the face side of the crown portion 3a is made thinner than the thickness W2 on the rear side, and the height t2 of the region 10a is It may be lower than the height t3 on the rear side. With such a configuration, the rigidity on the face side is lowered, the face portion is easily bent, and the resilience to the ball can be improved. Further, since the rigidity changes step by step, there is no possibility of damage due to stress concentration.

  Further, when the mass of the above-described weight concentration portion 10, that is, the thickness of the original outer shell of the head is t1; crown portion, t4; sole portion, the weight of the protruding portion is larger than the thickness of the entire head. It is preferably formed so as to occupy 5 to 30% of the weight (the weight of the head body 1 when the shaft 7 is removed in the figure). In other words, if the ratio is set to a range smaller than 5%, it is difficult to detect a feeling of weight at the time of swing, and the effect of the antegrade property of inertia force cannot be obtained sufficiently. This is because if the ratio is larger than 30%, the balance of the entire head is lost.

  Specifically, the thicknesses (widths) W1 and W2 shown in FIG. 4 are in the range of 1.0 to 8.0 mm, and the heights t2, t3, and t5 are in the range of 1.0 to 15.0 mm. In addition to making it thicker (higher) than the thickness of the surrounding part (outer shell) and making the width as small as possible, the sharpness is increased in comparison with the surrounding part and the degree of concentration of weight is increased. Set. That is, by increasing the degree of concentration of weight, it is possible to increase the effect of inertial antegrade.

  Further, it is preferable that the thickness of the outer shell body other than the above-described weight-concentrating portion is configured to be thinner and uniform than that. That is, by making the wall thickness uniform, there are no portions where the weight changes due to the wall thickness change. A weight body 15 for adjusting the position of the center of gravity may be arranged at any position inside the head. When the weight body 15 is viewed as a whole head, the weight body 15 is integrated with the weight concentration portion 10 at a position where the weight is not scattered as much as possible, for example, as shown in FIG. What is necessary is just to form in the boundary position of a back part. By doing so, it is possible to provide a golf club with a high trajectory and a large sweet area at the same time as obtaining a deep center of gravity position and a large moment of inertia around the center of gravity, without adversely affecting the forward performance of the inertial force.

  According to the golf club head as described above, the weight concentrating portion is not scattered at specific positions of the head main body, but the weight concentrating portion 10 is provided extending in the front-rear direction, that is, the swing plane direction. In the series of swing flows, especially when the cock is released, the rotation with respect to the shaft axis can be easily followed by the inertial force of the head in the swing plane direction. In particular, since the weight concentration portion 10 is disposed at a position passing through the center of gravity G of the head, it is easier to move forward. As a result, when the cock is released, it is easy to match the face surface with the swing stably in the direction of the hitting ball without performing a kneading operation, so that variation in hitting points at the time of impact is suppressed and the hitting ball direction is stabilized. become. Furthermore, since it becomes easy to detect the weight concentration part 10, there is also an effect that the hit points are less likely to vary on the toe-heel side.

  In addition, since the weight concentrated portion is not formed in the region immediately behind the face member 6 and the thin thickness state is secured, a deflection effect can be obtained at the time of impact, and the flight distance can be improved. Furthermore, by forming the weight concentrating portion from the crown portion 3a to the sole portion 3c, the rigidity of the rear portion side of the head main body 1 is improved, and as a result, the deflection of the face portion is increased and the resilience can be improved. The balance between the top and bottom (crown / sole) of the head is improved, and it becomes difficult to move forward. At the same time, the moment of inertia in the vertical direction around the center of gravity also increases, so that it is possible to provide a golf club that is resistant to vertical spot blurring.

  In the above configuration, the weight concentration portion 10 is formed in a rib shape and protrudes toward the center of the hollow portion of the head main body 1, so that the weight is increased along the vertical direction of the hollow portion of the head main body 1. Since the body is lined up along the swing plane, the forward performance is further improved, the mass distribution of the weight body is more easily sensed, and the swing can be stabilized.

  In this case, as shown in FIG. 7, by forming a large number of hole portions 21 in the weight concentration portion 20 configured in a rib shape, the ribs can be formed higher at the same weight ratio. The weight distribution effect along the vertical direction of the weight body can be improved. For this reason, the forward performance is further improved during the swing, and the swing can be stabilized.

  8 and 9 are views showing a second embodiment of the present invention. FIG. 8 is a longitudinal sectional view at a position passing through the center of gravity of the head, and FIG. 9 is a plan view of the head.

  In the above-described embodiment, the weight concentration portion 10 is formed continuously from the crown portion 3a to the sole portion 3c of the head body 1, but as shown in the drawing, the weight concentration portion 30 extending in the front-rear direction is You may form only in the crown part 3a. That is, in general, a hollow-structured head tends to be relatively heavy in order to lower the center of gravity, and the crown part tends to be formed relatively thin because the center of gravity is not adjusted. is there. For this reason, it is possible to make the player easily sense the weight body by forming the weight concentration portion 30 in the crown portion which is a thin-walled portion.

  10 and 11 are views showing a third embodiment of the present invention. FIG. 10 is a plan view of the head, and FIG. 11 is a back view of the head.

  In the above-described embodiment, the weight concentration portion is formed in a direction orthogonal to the face portion of the head. However, the weight concentration portion 40 of this embodiment is curved along the swing plane when the head body 1 is viewed in plan. Is formed. That is, by forming the weight concentrating portion 40 in such a manner, the effect of antegrade performance along the swing plane direction is further increased, and a stable swing that is difficult to shake can be performed. In particular, the antegrade effect of the turn of the head is enhanced, and it becomes easier to hit a draw ball (a ball that slightly turns to the left). In this case, if the weight concentration portion is also formed on the sole portion 3c side, it is preferable to form a curve in the direction along the swing plane as shown in FIG.

  Note that the radius of curvature of the curved weight concentrating portion described above may be formed in the range of 500 to 2000 mm in consideration of the difference of the player's swing plane. If this radius of curvature is reduced, the effect of the forward turn performance of the head becomes stronger, and the ease of hitting the draw ball is further improved. Moreover, it is preferable to form the weight concentration part 40 in the position which passes the gravity center G of a head similarly to the said embodiment.

FIG. 12 is a view showing a fourth embodiment of the present invention, and is a view showing a cross section on the face member side.
Normally, when the player swings, as shown in the schematic diagram of FIG. 13, the swing plane SP is inclined as shown by the alternate long and short dash line, and this inclination angle is the lie angle θ ( The face surface of the head main body is set to a square, and substantially corresponds to the angle formed by the shaft 7 and the horizontal surface in a state where the center of the sole portion is set in contact with the ground. Therefore, as shown in FIG. 12, the weight concentration portion 50 is formed so as to be inclined from the crown portion 3a to the sole portion 3c so as to correspond to the lie angle θ of the head body, thereby improving the antegrade property. In addition, the upper and lower weight concentrating portions 50 generate a force parallel to the swing plane due to the centrifugal force during the swing, making it easy to direct the head to a stable state (appropriate impact state) at the time of impact. It becomes possible.

  The embodiment of the present invention has been described above. However, the present invention only requires that a weight concentration portion extending in the front-rear direction with a predetermined length is provided on at least the crown portion of the head body having a hollow outer shell structure. The overall shape, material, formation method, and the like of the head body can be variously modified.

  Further, the weight concentration portion may be integrally formed by casting or the like together with the outer shell member constituting the head main body, or may be configured to be attached to the crown portion or the like as a separate body. . For example, as shown in FIG. 14, an opening 3h (long hole) is formed in the crown portion 3a along the front-rear direction, and the crown portion 3a is made of a material having a specific gravity larger than that of the outer shell member constituting the head body. A configuration in which the weight concentration portion 60 is fitted and fixed may be used. Further, in such a configuration, the weight concentration portion 60 may be configured with the same thickness as the outer shell member of the head body.

  Furthermore, the weight concentrating portion may be formed along the front-rear direction of the head. For example, as shown in FIG. 15, the weight concentrating portion 70 is arranged so that a number of weight bodies 71 are adjacent to each other. It may be configured by holding it. In this case, each weight body 71 may be fixed to the back side of the outer shell of the head body by welding or adhesion, or may be configured by integral molding.

The schematic diagram explaining a swing orbit. The figure which expanded a part of swing track | orbit of FIG. 1 with the motion of the head. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows 1st Embodiment of the golf club head which concerns on this invention, and is a longitudinal cross-sectional view in the position which passes the gravity center of a head. FIG. 2 is a transverse sectional view on the face side of the head shown in FIG. 1. FIG. 2 is a plan view of the head shown in FIG. 1. FIG. 2 is a rear view of the head shown in FIG. 1. The figure which shows the 1st modification of this invention. It is a figure which shows the 2nd Embodiment of this invention, and is a longitudinal cross-sectional view in the position which passes through the gravity center of a head. FIG. 9 is a plan view of the head shown in FIG. 8. It is a figure which shows the 3rd Embodiment of this invention, and is a top view of a head. FIG. 11 is a rear view of the head shown in FIG. 10. It is a figure which shows the 4th Embodiment of this invention, and is a cross-sectional view by the side of a face member. The schematic diagram which looked at the swing state of the player from the front. The figure which shows the 2nd modification of this invention. The figure which shows the 3rd modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Head main body 3a Crown part 3b Back part 3c Sole part 5 Face part 7 Shaft 10, 20, 30, 40, 50, 60, 70 Weight concentration part

Claims (8)

A golf club head having a hollow outer shell structure having a face portion for hitting a ball,
A golf club head characterized in that a weight concentrating portion extending in the front-rear direction and having a larger mass than the peripheral portion is formed at least on a crown portion of a head body constituting the golf club head.   2. The golf club head according to claim 1, wherein the length in the front-rear direction of the crown portion of the weight concentration portion is formed to be R / 3 or more, where R is the length in the front-rear direction of the crown portion.   The golf club head according to claim 1, wherein the weight concentration portion is formed at a rear side of 5 mm or more from an inflection point between the crown portion and the face portion.   4. The golf club head according to claim 1, wherein the weight concentration portion is continuously formed from the crown portion to the sole portion. 5.   5. The golf club head according to claim 1, wherein the weight concentration portion is provided so as to protrude toward a hollow portion of the head main body.   6. The golf club head according to claim 1, wherein the weight concentration portion is formed to be curved along a swing plane when the head body is viewed in plan.   The golf club head according to claim 1, wherein the weight concentration portion is formed along a lie angle.   6. The golf club head according to claim 5, wherein a plurality of holes are formed in a weight concentration portion provided so as to protrude toward the hollow portion of the head body.

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