JP2019216907A - Golf club head and golf club having the golf club head - Google Patents

Abstract

To provide a golf club head that allows an address to be determined easily, and stabilizes directionality in hitting a ball and a ball hitting position by stabilizing a grounding position of a sole, lowering the center of gravity, and hardly causing the head rotation, and also provide a golf club having the golf club head.SOLUTION: A golf club head 12 includes a hosel HZ, a face 13 on which a score line is formed, and a sole 15 in which a recess 30 is formed. The recess is formed so as to extend in a direction from a toe side to a heel side.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a golf club head, and more specifically, to a golf club head configured to be in a hand-first stance during a shot. More specifically, the present invention relates to golf club heads suitable for various clubs, from wedges for approach shots to iron clubs for full shots. Further, the present invention relates to a golf club including the golf club head.

  A normal iron club head is configured such that the sole width on the heel side is smaller than the sole width on the toe side. For example, Patent Literature 1 discloses that when a ball hits the sole side of the head when hitting the ground, a larger resistance force acts on the toe side, so that the head is likely to rotate in the direction in which the face closes. . Further, Patent Literature 1 discloses that when the face is closed, the ball is ejected to the left from the target direction and with a lower trajectory, so that if the head rotates in the direction in which the face closes, a miss shot is likely to occur. ing.

JP 2001-58016 A

  However, it has been found that the golf club according to Patent Document 1 has a problem that the address is not stable because the ground contact position of the sole is difficult to stabilize. Further, in the golf club according to Patent Literature 1, since the head rotation is large and the center of gravity is high, the face is opened and closed and the hitting position is difficult to be constant, so that the stability of the shot is reduced. was there.

  Therefore, the present invention stabilizes the ground contact position of the sole, lowers the position of the center of gravity, and makes it difficult for the head to rotate. As a result, the address is easily determined, and the directionality and the hit position at the time of hitting the ball are stabilized. It is an object of the present invention to provide a golf club head capable of performing the above-described operations and a golf club including the golf club head. Other purposes will become apparent throughout the present specification.

  A golf club head according to one embodiment of the present invention includes a hosel, a face on which a score line is formed, and a sole on which a recess is formed, and the recess extends from the toe side toward the heel side. Is formed.

  The golf club head according to one embodiment of the present invention is configured such that the length of the hosel is 35 mm to 55 mm.

  The golf club head according to one embodiment of the present invention is configured such that the width of the sole is 35 mm to 55 mm.

  The golf club head according to one embodiment of the present invention is configured such that the concave portion has a face side wall portion and a back side wall portion, and the height of the concave portion in a region where they intersect is 0.5 mm or more. You.

  In the golf club head according to one embodiment of the present invention, the concave portion is formed so as to be curved from the toe side in a direction perpendicular to the heel side direction.

  The golf club head according to one embodiment of the present invention is configured such that the width of the concave portion is 16 mm to 25 mm.

  The golf club head according to one embodiment of the present invention is configured such that a sole angle of the concave portion is 1 degree to 7 degrees.

  A golf club head according to an embodiment of the present invention is configured such that a sole angle of the sole on a leading edge side is 10 degrees to 25 degrees.

  A golf club head according to one embodiment of the present invention is configured such that a sole width on a leading edge side of the sole is 8 mm to 15 mm.

  The golf club head according to one embodiment of the present invention is configured such that the scoop angle on the trading edge side of the sole is 5 to 20 degrees.

  A golf club head according to an embodiment of the present invention is configured such that a sole width of the sole on a trading edge side is 8 mm to 20 mm.

  The golf club head according to one embodiment of the present invention is configured such that the loft angle is not less than 51 degrees and not more than 64 degrees.

  As described above, according to various embodiments of the present invention, the ground contact position of the sole is stabilized, the position of the center of gravity is lowered, and the head is unlikely to rotate. As a result, the address is easily determined, It is possible to provide a golf club head capable of stabilizing the direction and the hitting position, and a golf club including the golf club head.

Front view showing a golf club according to an embodiment of the present invention. FIG. 1 is a view of a golf club head according to an embodiment of the present invention as viewed from a face side. View of the golf club head shown in FIG. 2 as viewed from the toe side View of the golf club head shown in FIG. 2 as viewed from the sole side FIG. 1 is a view of a golf club head according to an embodiment of the present invention as viewed from a face side.

  Hereinafter, various embodiments will be described with reference to the drawings as appropriate. In the drawings, common components are denoted by the same reference numerals. In addition, the drawings are not necessarily shown at the same scale for convenience.

  FIG. 1 is a front view schematically showing a golf club according to one embodiment of the present invention. FIG. 1 illustrates an iron golf club. As shown in FIG. 1, the iron golf club 10 mainly includes a grip G, a shaft S connected to the grip G, and a golf club head (hereinafter simply referred to as “head”) connected to the shaft S via a hosel HZ. 12).

  The golf club 10 of FIG. 1 is placed on the ground in a standard ground contact state. In the present specification, the standard ground contact state of the head means that the shaft axis center line CL of the golf club 10 (or the center axis line of the cylindrical portion that receives the shaft S of the hosel HZ) is shifted from the horizontal plane HP to the lie angle specific to the head. A state in which the head is in contact with the horizontal plane HP so that the face is inclined with respect to the horizontal plane HP by a loft angle β inherent to the head, while being tilted by α. The golf club head according to one embodiment of the present invention is configured such that the loft angle is not less than 51 degrees and not more than 64 degrees, but is not limited to this.

  The head according to an embodiment of the present invention will be further described with reference to FIGS. It should be noted that FIGS. 2 to 5 do not necessarily accurately reflect the actual dimensions in order to clearly show the structure of the head 12.

  The head 12 shown in FIGS. 2 and 3 is placed on the ground parallel to the horizontal plane HP in a standard grounding state. In other words, the center line CL of the shaft axis of the head 12 is inclined from the horizontal plane HP by a predetermined lie angle α as shown in FIG. 2, and the face 13 of the head 12 has a predetermined loft angle β as shown in FIG. Only from the horizontal plane HP.

  As shown in FIG. 3, the head 12 includes a face 13 for hitting a ball, a top 16 continuous with an upper edge of the face 13, and a sole extending rearward from a leading edge 19 which is a lower edge of the face 13. The back face 14 connects the trailing edge 20, which is the rear end of the sole 15, to the top 16, and the toe 17 connects the top 16 to the sole 15.

  The head 12 according to one embodiment of the present invention is obtained by casting or forging a metal material such as stainless steel or a titanium alloy. The head 12 may be manufactured from a single metal material, or may be manufactured from a plurality of metal materials. Further, a plating layer made of various metal materials such as nickel, chromium, and zinc may be formed on the surface of the head 12.

  A plurality of face lines 18 are formed on the face 13 of the head base 12. Each of the plurality of face lines 18 is formed to extend along the toe-heel direction (the left-right direction in FIG. 2). Various specifications such as the number, depth, and width of the face lines can be arbitrarily set within a range defined by the “Rules for Clubs and Balls” defined by R & A Rules Limited. The face line 18 is formed by engraving the surface of the base material of the head 12 using a milling machine or an engraving machine, or by pressing a stamping die having a projection having a shape corresponding to the face line against the base material 22. Is done.

  The golf club head 12 according to one embodiment of the present invention includes a hosel HZ, a face 13 on which a score line 18 is formed, and a sole 15 on which a recess 30 is formed. It is formed to extend in the heel side direction.

  In this manner, by providing the two sole portions sandwiching the concave portion, the ground contact position of the sole can be stabilized, so that the address can be easily determined, and the direction and the position of the hit ball can be stabilized. It is possible to provide a golf club head that contributes and a golf club including the golf club head.

  As described above, the recess 15 is formed in the sole 15. As shown in FIG. 4 described later, a bottom line BL connecting both end portions of the concave portion 30 is shown. The bottom line BL extends generally along the face 13 in the toe-heel direction (that is, in a direction parallel to the score line 18), but slightly curves in a direction perpendicular to the toe-heel direction as shown. Can be formed. By curving the concave portion 30 in this manner, it is possible to sufficiently secure the sole width and the angle on the leading edge side of the concave portion 30 even with a head whose R in the toe-heel direction of the sole is relatively small.

  The golf club head 12 according to one embodiment of the present invention is configured such that the length X of the hosel is 35 mm to 55 mm. Here, as shown in FIG. 3, the hosel length X refers to the length from the hosel end to the position where the center of the shaft axis comes off to the sole side. When the length X of the hosel is long, the height of the center of gravity increases accordingly, and the depth of the center of gravity from the face surface tends to be shallow. Therefore, the shorter the length X of the hosel, the more the golf club according to one embodiment of the present invention. It can be said that the head 12 is suitable. However, considering the shaft adhesive strength and the strength against damage to the shaft when hitting with a hosel by mistake at the time of hitting, it is most effective to set the hosel length X to the above range. It turned out to be.

  In this manner, since the center of gravity of the head can be lowered, it is possible to provide a golf club head capable of stabilizing the hit position at the time of hitting a ball and a golf club including the golf club head.

  The golf club head 12 according to one embodiment of the present invention is configured so that the width a of the sole is 35 mm to 55 mm. This contributes to sufficiently lowering the center of gravity of the head and increasing the depth of the center of gravity from the face surface. Further, in the golf club head 12 according to one embodiment of the present invention, the concave portion 30 has a face side wall portion 30a and a back side wall portion 30b, and the height Y of the concave portion in a region where these cross each other is 0.5 mm. The configuration is as described above. By setting the height Y of the concave portion to 0.5 mm or more, for example, even when the lie is bad, it is possible to avoid a situation in which the sitting of the sole is difficult to stabilize.

  In this manner, by providing the two sole portions sandwiching the concave portion, the ground contact position of the sole can be stabilized, so that the address can be easily determined, and the direction and the position of the hit ball can be stabilized. It is possible to provide a golf club head that contributes and a golf club including the golf club head.

  The golf club head 12 according to one embodiment of the present invention is configured such that the width b of the recess 30 is 16 mm to 25 mm. Thereby, the sole 15 can be stably grounded, and the stability of the attitude at the time of addressing is improved. Also, compared to a round sole or a flat sole, the sole round does not disturb or the concave portion of the sole is easily sinked into the turf, so that the address can be made lower with respect to the ball. Therefore, the actual position of the center of gravity can function lower. The golf club head 12 according to one embodiment of the present invention is configured such that the sole angle γ of the recess 30 is 1 to 7 degrees. As a result, it has been found that the convergence at the time of addressing is improved. On the other hand, it has been found that if the sole angle γ exceeds 7 degrees, it becomes unnatural to prepare for a hand first operation with one grip or more. With the above configuration, when the sole angle of the concave portion 30 is within the above range, when the face is adjusted to the target, it is possible to prepare for a hand first at an appropriate address, and not only the approach but also the full Even at the time of a shot, it is possible to make an angle capable of smoothly swinging, and at the same time, it is possible to prevent an excessive jump due to the sole angle γ.

  The golf club head 12 according to one embodiment of the present invention is configured such that the sole angle δ on the leading edge 19 side of the sole 15 is 10 degrees to 25 degrees. Here, by setting the hand first at the address set by the sole angle γ, it is easier to hit on the down-blow trajectory than in the conventional case, so a sufficient angle is required. However, when the angle is 25 degrees or more, there is a possibility of top and jumping. The golf club head 12 according to one embodiment of the present invention is configured such that the sole width c of the sole 15 on the leading edge 19 side is 8 mm to 15 mm. As a result, it is possible to reduce the jumping at the time of hitting the ball, and it is possible to improve the anti-duffling effect. More specifically, even if the sole angle on the leading edge side is provided, if the sole angle is less than 8 mm, the leading edge may be stabbed when hit with a duff, while on the other hand, if the sole angle is 15 mm or more, the leading edge may be below the ball. In some cases, the edge is difficult to enter, and when the ball is hit with a duff, the ball may jump up too much. Therefore, it has been found that setting the sole width c within the above range has the advantageous effect.

  The golf club head 12 according to one embodiment of the present invention is configured such that the scoop angle ε of the sole 15 on the trading edge 20 side is 5 degrees to 20 degrees. The scoop angle can be in a range that does not hinder the swing and does not adversely affect the center of gravity. More specifically, if the angle is less than 5 degrees, even if there is an effect of lowering or lowering the center of gravity, a collision behind the sole at the time of hitting the ball may occur. On the other hand, if the angle is larger than 20 degrees, the sole width on the trading edge side is good in a narrow range, but if the angle is wide, the center of gravity will be high and it will not be suitable for its intended purpose. It has been found that the above has the advantageous effect described above. The golf club head 12 according to one embodiment of the present invention is configured such that the sole width d of the sole 15 on the trading edge 20 side is 8 mm to 20 mm. The same technical effect as the above-mentioned scoop angle can be obtained also with respect to the sole width.

  In one embodiment of the present invention, the concave portion 30 has a face side wall portion 30a closer to the face 13 than the bottom line BL and a back side wall portion 30b closer to the back face 14 than the bottom line BL. In one embodiment, since the face side wall portion 30a and the back side wall portion 30b are connected to the portion other than the concave portion of the sole 15 with a gentle curved surface, the contour 30c of the concave portion 30 may not be clearly visible. In FIG. 4, the outline 30c is shown by a solid line for convenience of explanation.

  In one embodiment of the present invention, the concave portion 30 is configured such that the boundary between the face side wall portion 30a and the sole 15 (the portion of the contour 30c closer to the face 13 than the bottom line BL) is convexly curved toward the face 13. However, the present invention is not limited to this. In one embodiment of the present invention, the boundary between the back side wall 30b and the sole 15 (the part of the contour 30c closer to the back face 14 than the bottom line BL) is formed between the face side wall 30a and the sole 15. It may be configured to have a shape closer to a straight line than the boundary, but is not limited to this.

   As shown in FIG. 4, of the contour 30c, the toe 17 side is a toe side end 30e, and the heel side is a heel side end 30d. In one embodiment of the present invention, the recess 30 extends in the toe-heel direction along the sole 15 (that is, in a direction parallel to the score line 18), and extends from the toe-side end 30e to the heel-side end. The range up to the section 30d is configured to be at least equal to or longer than the length of the score line. As a result, it is possible to improve the sitting of the sole as much as possible within the range of the width of the score line even on a slope where the toe is raised or the toe is lowered on the course. The range from the toe side end 30e to the heel side end 30d of the recess 30 is where the curvature is the largest at the position connecting the sole 15 to the toe 17, and where the curvature is the largest at the position connecting the sole 15 to the heel. Can be up to. As described above, even if the concave portion 30 is provided in the toe / heel beyond the point where the curvature of the sole to the toe / heel is the largest, the sole does not touch the ground at the time of addressing in that range. Can be set to a typical range.

  Here, as shown in FIG. 2, a plurality of score lines 18 are formed on the face 13. In one embodiment, the “length direction of the score line” is the most significant among the plurality of score lines 18. It means the length direction (toe / heel direction) of the long score line 18. In the embodiment shown in FIG. 2, thirteen score lines 18 are formed on the face 13, and five face lines 18 near the sole 15 have the longest length. “Score line length” in the embodiment means the length of the longest face line.

  The length of the score line in the present specification is not limited to the length of the longest of the plurality of score lines 18. For example, out of a plurality of score lines 18 having different lengths, focus on the score line 18 having the median length in the toe-heel direction, and change the length of the score line 18 having the median length to “ The length of the score line may be used. For example, in the example of FIG. 2, since thirteen score lines 18 are formed on the face 13, the seventh longest score line (that is, the seventh score line from the top in FIG. 2) is focused on. The length of the score line may be referred to as “score line length”.

  The golf club head 12 according to one embodiment of the present invention includes a hosel HZ, a face 13 on which a score line 18 is formed, and a sole 15 on which a recess 30 is formed. The sole 15 is formed to extend in the heel side direction, the width of the sole 15 is configured to be 35 mm to 55 mm, and the length of the hosel HZ is configured to be 35 mm to 55 mm.

  In this way, the sole contact position is stabilized, the center of gravity is lowered, and the head is less likely to rotate. As a result, the address is easily determined, and the direction and the position of the ball at the time of hitting are stabilized. And a golf club including the golf club head.

  The depth of the center of gravity from the face 13 can be 3.0 mm or more. For example, with a 52 degree wedge, the center of gravity depth can be 4.9 mm. In this regard, in the case of a general wedge, the center of gravity tends to be shallow due to the relationship between the size of the loft and the position of the hosel, but the movement of the loft when hitting the ball tends to be large, making it difficult for the ball to rise. In contrast, when the wedge has a deep center of gravity, it is found that although the loft moves, the leading edge easily moves into the downward direction of the ball, which leads to an improvement in the meeting rate at the time of hitting the ball.

The center of gravity distance and the moment of inertia around the shaft axis are preferably 43 mm or more in terms of the center of gravity distance and 8000 g · cm ² in terms of the moment of inertia in order to minimize opening and closing of the golf club head 12. In addition, it is more preferable that the angle of the center of gravity be set to 20 degrees or more in order to minimize the movement of turning the golf club head 12.

  Next, with reference to FIG. 5 and Table 1, the contour shape dimensions of the face 13 of the golf club head 12 will be described. The dimension of the outer contour (length at the end of the toe side line) of the face 13 shown in FIG. 4 is Z (mm), and the dimension of the inner contour (length at the end of the heel side line) of the face 13 is W (mm). Then, as shown in Table 1 below, in this embodiment, the outer dimension Z is 64 mm or more and the inner dimension W is 44 mm or more, and the ratio Z / W is 143.5% or more and 150 mm or more. % Or less. It was found that by providing such dimensions and ratios, the directionality was good from the approach to the full shot, and the stroke was stable.

  In one embodiment of the present invention including the above results, the ratio (ratio Z / W) of the outside dimension Z and the inside dimension W of the illustrated contour shape of the face 13 can be set to 120% to 150%. In this case, the height of the face 13 on the toe side can be 60 mm or more, and the height of the face 13 on the heel side can be 42 mm or more. (Thus, by securing a sufficient face dimension, even when the sole width is widened or the width of the concave portion is widened, the sole is not seen at the time of addressing. If the above ratio is too large, the inclination of the top line becomes strong, so that the face 13 can be easily opened and closed at the time of swing, and the stroke is not stabilized. On the other hand, if the above ratio is too small, the ratio becomes too small. Since the lie angle is felt to be flat, not only the approach but also the stroke is not stable when a full shot is assumed.

  The dimensions, materials, and arrangements of each component described herein are not limited to those explicitly described in the embodiments, and each component may be included in the scope of the present invention. To have dimensions, materials, and configurations. In addition, components not explicitly described in the present specification can be added to the embodiments described, or some of the components described in each embodiment can be omitted. For example, in the illustrated embodiment, only one recess 30 is formed in the sole 15, but a plurality of recesses formed in the same manner as the recess 30 may be provided in the sole 15. In this case, the plurality of recesses have a surface area smaller than the surface area of the illustrated recess 30 and are arranged inside the region where the recess 30 is arranged in the illustrated embodiment.

DESCRIPTION OF SYMBOLS 10 Golf club 12 Golf club head 13 Face 14 Back face 15 Sole 16 Top 17 Toe 18 Face line 19 Leading edge 20 Trailing edge 30 Depression 30a Face side wall 30b Back face side wall 30d Heel side end 30e Toe side end

Claims (12)

With a hosel,
A face with a score line formed,
A sole with a recess formed,
With
The golf club head according to claim 1, wherein the recess is formed so as to extend from the toe side toward the heel side.   The golf club head according to claim 1, wherein the hosel has a length of 35 mm to 55 mm.   The golf club head according to claim 1, wherein a width of the sole is 35 mm to 55 mm. The recess has a face side wall portion and a back side wall portion,
The golf club head according to any one of claims 1 to 3, wherein a height of the concave portion in a region where these cross each other is 0.5 mm or more.   The golf club head according to any one of claims 1 to 4, wherein the recess is formed so as to be curved from the toe side in a direction perpendicular to the heel side direction.   The golf club head according to any one of claims 1 to 5, wherein the width of the concave portion is 16 mm to 25 mm.   The golf club head according to any one of claims 1 to 6, wherein a sole angle of the concave portion is 1 degree to 7 degrees.   8. The golf club head according to claim 1, wherein a sole angle of the sole on a leading edge side is 10 degrees to 25 degrees. 9.   9. The golf club head according to claim 1, wherein a sole width of the sole on a leading edge side is 8 mm to 15 mm. 10.   The golf club head according to any one of claims 1 to 9, wherein a scoop angle of the sole on a trading edge side is 5 degrees to 20 degrees.   The golf club head according to any one of claims 1 to 10, wherein a sole width of the sole on a trading edge side is 8 mm to 20 mm.   The golf club head according to any one of claims 1 to 11, wherein the loft angle is not less than 51 degrees and not more than 64 degrees.