JP2017077397A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head that can improve repulsion performance at ball hitting and inhibit a decline in carry when hitting a ball at an off-center.SOLUTION: An iron-type golf club head is provided with a recessed part at a back surface of a face part of the golf club head. A first recessed part is provided on a toe side, a top side and a heel side of the back surface. A second recessed part is provided on a sole side of the back surface. A depth in a face back direction of the second recessed part is deeper than a depth in the face back direction of the first recessed part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an iron type golf club head.

  It is desirable that the iron type golf club has a high ball rebound performance, and even if the ball is hit off-center at the face portion, the change in the flight distance is small.

  In Patent Document 1, by forming a plurality of annular grooves arranged inside and outside at an interval in the elastic annular region on the back surface of the face plate, and forming an annular flange between two adjacent annular grooves, Golf club heads that produce high resilience and expand the sweet zone have been proposed.

  In Patent Document 2, the lower part of the inner surface on the face surface side of the cavity portion is a forward-facing recess that is recessed toward the face surface, the deflection of the face portion when hitting the ball is large, and the initial velocity of the ball is Iron-type golf club heads that have become larger and have increased flight distance have been proposed.

  In Patent Document 3, by forming a thin-walled portion or a through-hole on the top portion side and the sole portion side of the back surface of the face portion along the edges on the top portion side and the sole portion side, An iron-type golf club having a nearby region as a large deformation portion has been proposed.

  In Patent Document 4, by providing a face portion-side thin portion and a sole portion-side thin portion at a position closer to the lower side of the face portion, the deflection area when the ball is hit by the face portion is expanded at the lower portion of the face portion. Golf club heads have been proposed.

  Patent Document 5 proposes a golf club in which grooves are provided in the top side edge, the toe side edge, and the leading edge on the back surface of the face.

  Patent Document 6 proposes an iron type golf club head in which a concave groove extending annularly along the outer peripheral end surface is formed on the back surface of the face member.

JP2015-23945 JP 2015-19746 A JP 2012-90680 A Japanese Patent No. 5472522 JP 2007-44445 A JP 2005-143591 A

  An object of the present invention is to provide a golf club head capable of improving the resilience performance at the time of hitting the ball and suppressing the decrease in the flight distance when hitting the ball off-center.

  The golf club head of the present invention is an iron-type golf club head in which a recess is provided in the back surface of the face portion of the golf club head, and the first recess is disposed on the toe side, top side, and heel side of the back surface. A second recess is disposed on the sole side of the back surface, and the depth of the second recess in the face-back direction is greater than the depth of the first recess in the face-back direction. It is.

  In one aspect of the present invention, the first recess is continuously disposed from the toe side through the top side to the heel side.

  In one aspect of the present invention, the first recess and the second recess are continuous.

  In one aspect of the present invention, the first recess on the toe side wraps around to the sole side and continues to the toe side end of the second recess.

  In one aspect of the present invention, the golf club head includes a head main body having a hosel portion, and a face main body mounted on a front surface of the head main body and including the face portion, and the face main body includes the golf club head. Constitutes a part of the sole part.

  In the golf club head of the present invention, the first recess is disposed on the toe side, top side, and heel side of the back surface of the face portion, and the depth in the face / back direction is the first recess on the sole side of the back surface. Since the second concave portion larger than the depth of the ball is disposed, the deflection of the face portion is increased to improve the resilience of the ball, and the flight distance when the ball is hit off-center in the face portion is suppressed. Can do.

It is a rear view of the iron type golf club head concerning an embodiment. It is a front view of the golf club head of FIG. FIG. 2 is a bottom view of the golf club head of FIG. 1. It is sectional drawing which follows the IV-IV line of FIG. It is a perspective view from the back side of a face body. FIG. 5 is an end view corresponding to FIG. 4 of the face body.

  Hereinafter, an iron type golf club head according to an embodiment will be described with reference to FIGS.

  The iron-type golf club head 1 is attached to the tip of a shaft, and includes a head main body 10 and a face main body 20 attached to the front surface of the head main body 10. 1st recessed parts 23-25 and the 2nd recessed part 26 are provided in the back surface 21b. In FIG. 2, the 1st recessed parts 23-25 and the 2nd recessed part 26 are shown with the broken line.

  The head main body 10 includes a face main body mounting portion 11 to which the face main body 20 is mounted, a hosel portion 12 continuous to the heel side of the face main body mounting portion 11, and a sole portion 13 continuous to the lower portion of the face main body mounting portion 11. ing. The hosel part 12 is provided with a hosel hole (not shown) for inserting a shaft. The front surface of the face portion 21 is a face surface 21f. A number of score lines (grooves, not shown) may be provided on the face surface 21f.

  A cavity portion 14 is provided on the back surface 21 b side of the face portion 21 of the golf club head 1. The cavity portion 14 extends from the toe side to the heel side, and is surrounded by the sole portion 13, the toe side convex portion 15, the top side convex portion 16, and the heel side convex portion 17. These convex portions 15 to 17 stand on the back side from the peripheral edge of the face main body mounting portion 11.

  As shown in FIG. 4, the face main body 20 has a substantially L-shaped vertical cross-sectional shape having a face portion 21 and a bottom portion 22 connected to the sole portion 13. When the face body 20 is mounted on the face body mounting portion 11 and the head body 10 and the face body 20 are integrated to produce the golf club head 1, the bottom portion 22 of the face body 20 and the sole portion 13 of the head body 10 A sole portion of the golf club head 1 is configured. The face main body 20 is fixed to the face main body mounting portion 11 by fixing means such as electron beam welding.

  The upper surface portion 13t of the sole portion 13 has an intermediate portion in the toe-heel direction that is higher than the toe side and the heel side, and gradually becomes lower from the intermediate portion toward the toe side and the heel side. ing. As shown in FIG. 3, a groove 13 a extending in the toe-heel direction may be provided on the bottom surface portion 13 b of the sole portion 13. Both end portions of the groove 13a in the toe-heel direction are provided so as to approach the back side as the end portions approach.

  On the back surface 21 b of the face portion 21, first recesses 23 to 25 and a second recess 26 are provided. The first recess 23 is provided along the toe side edge 20 a of the face body 20. The first recess 24 is provided along the top side edge 20 b of the face body 20. The first recess 25 is provided along the heel side edge 20 c of the face body 20. The second recess 26 is provided along the sole side edge 20 d of the face body 20.

  The top side of the first recess 23 is continuous with the toe side of the first recess 24. The heel side of the first recess 24 is continuous with the top side of the first recess 25. The sole side of the first recess 25 is continuous with the heel side of the second recess 26. The sole side of the first recess 23 is continuous with the toe side of the second recess 26. By making the 1st recessed part 24 and the 1st recessed part 25, and the 2nd recessed part 26 continue, the face part 21 can be made easier to bend.

  The length of the bottom portion 22 in the toe / heel direction is shorter than the length of the face portion 21 in the toe / heel direction. The toe side end surface 22 a (FIG. 5) of the bottom portion 22 is located on the heel side with respect to the toe side edge 20 a of the face body 20. Therefore, the first concave portion 23 is curved toward the heel side toward the sole side, and is connected to the toe side end portion of the second concave portion 26 so as to go around the sole side of the face body 20.

  The toe side end of the second recess 26 extends to the toe side end surface 22a of the bottom 22 and is an open end. Similarly, the heel side end portion of the second recess 26 extends to the heel side end surface of the bottom portion 22 and is an open end. Thus, by making the toe side and the heel side of the second recesses open ends, the face portion 21 can be more easily bent. The first recess 23 continues to the second recess 26 slightly on the heel side from the toe side end surface 22a of the bottom 22. The first recess 25 continues to the second recess 26 slightly on the toe side from the heel side end surface of the bottom 22.

  In this embodiment, the first recesses 23 to 25 have the same or substantially the same width and depth, and are smaller in width and depth than the second recess 26. The first recesses 23 to 25 may have different widths and depths.

  In this embodiment, the first recesses 23 to 25 are continuously arranged from the toe side through the top side to the heel side on the back surface 21 b of the face body 20, and continue to the second recess 26. Accordingly, the back surface 21b of the face body 20 is provided with the recesses 23 to 26 so as to surround the toe side, the top side, the heel side, and the sole side, so that the face portion 21 can be more easily bent.

  FIG. 6 shows a state in which the face surface 21f is set to be perpendicular to the horizontal plane (hereinafter referred to as a face surface vertical state). The thickness T1 of the face portion 21 of the face body 20 is not particularly limited, but is, for example, not less than 1.8 mm and not more than 2.6 mm. In this embodiment, it is 2.2 mm.

  The depth D1 in the face-back direction of the first recesses 23 to 25 in the face surface vertical state is preferably 0.1 mm or more, particularly 0.2 mm or more, and preferably 0.5 mm or less, particularly 0.4 mm or less. In this embodiment, it is 0.3 mm. The width W1 in the top / sole direction of the first recesses 23 to 25 in the face surface vertical state is preferably 0.5 mm or more, particularly 0.7 mm or more, and preferably 1.5 mm or less, particularly 1.3 mm or less. In this embodiment, it is 1.0 mm.

  The distance L3 from the toe side edge 20a, the top side edge 20b, and the heel side edge 20c of the face main body 20 to the first recesses 23 to 25 in the face surface vertical state is preferably 5.0 mm or less, particularly 4.0 mm or less. In this embodiment, it is 3.0 mm.

  In the state perpendicular to the face surface, the depth D2 of the second recess 26 in the face-back direction with respect to the back surface 21b is preferably 0.3 mm or more, particularly 0.5 mm or more, preferably 1.3 mm or less, particularly 1.1 mm or less. In this embodiment, it is 0.8 mm. The depth D2 of the second recess 26 is larger than the depth D1 of the first recesses 23 to 25, and the sole side of the face portion 21 can be more easily bent. Since an iron-type golf club mainly hits a golf ball on the ground, it often hits the ball on the sole side of the face portion 21. Therefore, the resilience at the main hitting position can be further improved by making the sole side of the face portion 21 that is the main hitting position easier to bend. Further, if a deep concave portion is provided over the entire circumference of the back surface 21b of the face portion 21, there is a possibility that the hitting durability is inferior. Therefore, by making the depth D1 of the first recesses 23 to 25 different from the depth D2 of the second recess 26, the required impact durability can be provided while improving the resilience. In a state where the face surface is vertical, a distance W2 from a position on the top side where the virtual surface 21c extending in the sole direction from the back surface 21b intersects the second recess 26 to a position on the sole side where the virtual surface 21c and the second recess 26 intersect Is preferably 2.5 mm or more, particularly preferably 2.7 mm or more, and is preferably 3.5 mm or less, particularly 3.3 mm or less. In this embodiment, it is 3.0 mm.

  The second recess 26 may be recessed not only on the face surface 21 f side in the face portion 21 but also on the sole side in the bottom portion 22. Thereby, the sole side of the face portion 21 can be more easily bent. The distance L1 in the top / sole direction as the entire second recess 26 in the face surface vertical state is preferably 2.5 mm or more, particularly 2.7 mm or more, and preferably 3.8 mm or less, particularly 3.6 mm or less. In this embodiment, it is 3.3 mm. The distance L2 in the face-back direction as a whole of the second recess 26 in the face surface vertical state is preferably 1.5 mm or more, particularly 2.0 mm or more, and preferably 4.0 mm or less, particularly 3.5 mm or less. In this embodiment, it is 3.2 mm.

  When a golf ball is hit with this golf club head 1, since the second recess 26 is provided along the sole side edge 20 d of the face body 20, the sole side rigidity of the golf club head 1 is lowered, and the face portion 21. The sole side of the golf ball is more easily bent, and the resilience when the golf ball is hit is improved.

  Even when the ball is hit off-center in the face portion 21, the first recesses 23 to 25 are provided along the toe side edge 20a, the top side edge 20b, and the heel side edge 20c of the face body 20. The face portion 21 is easily bent, and a decrease in flight distance can be suppressed.

  In this embodiment, the first recesses 23 to 25 and the second recess 26 are continuously provided, but may be interrupted at one or a plurality of locations.

  In this embodiment, the first recesses 23 to 25 and the second recess 26 have a circular cross section, but may have a polygonal shape such as a triangle or a quadrangle, a V shape, an asymmetric shape, or the like.

DESCRIPTION OF SYMBOLS 1 Golf club head 10 Head main body 11 Face main body mounting part 12 Hosel part 13 Sole part 14 Cavity part 15 Toe side convex part 16 Top side convex part 17 Heel side convex part 20 Face main body 21 Face part 22 Bottom part 23-25 1st recessed part 26 Second recess

Claims (5)

In an iron type golf club head in which a recess is provided on the back surface of the face portion of the golf club head,
A first recess is disposed on the toe side, top side and heel side of the back surface;
A second recess is disposed on the sole side of the back surface;
The golf club head according to claim 1, wherein a depth of the second recess in the face-back direction is greater than a depth of the first recess in the face-back direction.   2. The golf club head according to claim 1, wherein the first recess is continuously arranged from the toe side through the top side to the heel side.   3. The golf club head according to claim 1, wherein the first recess and the second recess are continuous.   4. The golf club head according to claim 3, wherein the first concave portion on the toe side goes around the sole side and continues to the toe side end portion of the second concave portion. 5. The golf club head according to claim 1, comprising: a head body having a hosel part; and a face body mounted on a front surface of the head body and including the face part.
2. The golf club head according to claim 1, wherein the face body constitutes a part of a sole portion of the golf club head.

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