JP6661962B2 - Golf club head - Google Patents

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 resilience performance and a small change in the flight distance even when the ball is hit off center at the face portion.

  Patent Literature 1 discloses that a plurality of annular grooves are arranged at intervals in an elastic annular area on the back surface of a face plate and that an annular flange is formed between two adjacent annular grooves. Golf club heads that generate high elastic rebound and enlarge the sweet zone have been proposed.

  In Patent Literature 2, the lower portion of the inner surface on the face side of the cavity portion is a forward recess that is recessed toward the face surface. When the ball hits, the deflection of the face portion is large, and the initial velocity of the ball is reduced. Iron-type golf club heads that are larger and have a longer flight distance have been proposed.

  Patent Literature 3 discloses that a thin thick portion or a through hole is formed on the top portion side and the sole portion side on 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 in which the vicinity region is 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, a bending area that bends when a ball is hit with the face portion is enlarged at a lower portion of the face portion. Golf club heads have been proposed.

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

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

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

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a golf club head capable of improving the resilience performance when hitting a ball and suppressing a decrease in 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 concave portion is provided on the back surface of the face portion of the golf club head, wherein the first concave portion is disposed on the toe side, the top side, and the 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 arranged from the toe side to the heel side via the top side.

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

  In one aspect of the present invention, the first concave portion on the toe side goes around the sole side and is connected to the toe side end of the second concave portion.

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

  In the golf club head of the present invention, the first concave portion is disposed on the toe side, the top side, and the heel side of the back surface of the face portion, and the depth in the face-back direction is the first concave portion on the sole side of the back surface. Since the second concave portion having a depth larger than the depth of the ball is arranged, the deflection of the face portion is increased, the resilience of the ball is improved, and the decrease in the flight distance when the ball is hit off center at the face portion is suppressed. Can be.

FIG. 2 is a rear view of the iron-type golf club head according to the embodiment. It is a front view of the golf club head of FIG. It is a bottom view of the golf club head of FIG. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1. It is a perspective view from the back side of a face main part. FIG. 5 is an end view corresponding to FIG. 4 of the face main 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 body 10 and a face body 20 mounted on the front surface of the head body 10. The first recessed portions 23 to 25 and the second recessed portion 26 are provided on the back surface 21b. In FIG. 2, the first concave portions 23 to 25 and the second concave portion 26 are indicated by broken lines.

  The head main body 10 has a face main body mounting portion 11 to which the face main body 20 is mounted, a hosel portion 12 connected to the heel side of the face main body mounting portion 11, and a sole portion 13 continuous below the face main body mounting portion 11. ing. The hosel portion 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 large number of score lines (grooves, not shown) may be provided on the face surface 21f.

  The 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 protrusion 15, the top side protrusion 16, and the heel side protrusion 17. These protruding portions 15 to 17 stand on the back side from the periphery 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 golf club head 1 is manufactured by mounting the face main body 20 on the face main body mounting portion 11 and integrating the head main body 10 and the face main body 20 with each other, the bottom portion 22 of the face main body 20 and the sole portion 13 of the head main 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 is such that the middle portion in the toe / heel direction is a higher mountain portion than the toe side and the heel side, and gradually lowers from this middle portion toward the toe side and the heel side. ing. As shown in FIG. 3, a groove 13a extending in the toe-heel direction may be provided on the bottom surface 13b of the sole portion 13. Both ends in the toe-heel direction of the groove 13a are provided so that the end is closer to the back side.

  On the back surface 21b of the face portion 21, first concave portions 23 to 25 and a second concave portion 26 are provided. The first recess 23 is provided along the toe side edge 20 a of the face main body 20. The first recess 24 is provided along the top edge 20 b of the face main body 20. The first recess 25 is provided along the heel side edge 20 c of the face main body 20. The second recess 26 is provided along the sole-side edge 20 d of the face main 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 connected to the toe side of the second recess 26. The face portion 21 can be more easily bent by connecting the first recess 24 and the first recess 25 with the second recess 26.

  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 22a (FIG. 5) of the bottom 22 is located on the heel side of the toe-side edge 20a of the face main body 20. Therefore, the first concave portion 23 curves toward the heel side as it goes toward the sole side, and goes around the sole side of the face main body 20 so as to be continuous with the toe end of the second concave portion 26.

  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 of the second recess 26 extends to the heel-side end surface of the bottom 22 and is an open end. By setting the toe side and the heel side of the second concave portion as the open ends, the face portion 21 can be more easily bent. The first concave portion 23 is connected to the second concave portion 26 slightly on the heel side of the toe end surface 22a of the bottom portion 22. Further, the first concave portion 25 is connected to the second concave portion 26 slightly on the toe side of the heel side end surface of the bottom portion 22.

  In this embodiment, the first recesses 23 to 25 have the same or substantially the same width and depth, and have a smaller 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 on the back surface 21 b of the face main body 20 from the toe side to the heel side via the top side, and are continuous with the second recess 26. Therefore, concave portions 23 to 26 are provided on the back surface 21b of the face main body 20 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 main body 20 is not particularly limited, but is, for example, 1.8 mm or more and 2.6 mm or less. In this embodiment, it is 2.2 mm.

  The depth D1 of the first recesses 23 to 25 in the face-back direction in the state perpendicular to the face surface is preferably 0.1 mm or more, more preferably 0.2 mm or more, and is preferably 0.5 mm or less, particularly 0.4 mm or less. In this embodiment, it is 0.3 mm. The width W1 of the first recesses 23 to 25 in the top-sole direction in the state perpendicular to the face surface is preferably 0.5 mm or more, particularly 0.7 mm or more, and 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 in the vertical state of the face surface to the first concave portions 23 to 25 is preferably 5.0 mm or less, particularly 4.0 mm or less. In this embodiment, it is 3.0 mm.

  In the face-perpendicular state, the depth D2 of the second concave portion 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, and 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 concave portion 26 is larger than the depth D1 of the first concave portions 23 to 25, so that the sole side of the face portion 21 can be more easily bent. Since the iron type golf club mainly hits a golf ball on the ground, the golf ball is often hit on the sole side of the face portion 21. Therefore, by making the sole side of the face portion 21 serving as the main hitting position more flexible, resilience at the main hitting position can be further improved. If a deep recess is provided over the entire circumference of the back surface 21b of the face portion 21, the durability to impact may be poor. Therefore, by making the depth D1 of the first recessed portions 23 to 25 different from the depth D2 of the second recessed portion 26, it is possible to provide a necessary impact durability while improving resilience. In the vertical state of the face surface, 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 concave portion 26 to a position on the sole side where the virtual surface 21c intersects with the second concave portion 26. Is preferably 2.5 mm or more, particularly preferably 2.7 mm or more, more preferably 3.5 mm or less, and particularly preferably 3.3 mm or less. In this embodiment, it is 3.0 mm.

  The second concave portion 26 may be recessed not only on the face surface 21f 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 of the entire second concave portion 26 in the state perpendicular to the face surface is preferably 2.5 mm or more, particularly 2.7 mm or more, and more 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 concave portion 26 in the vertical state of the face surface is preferably 1.5 mm or more, particularly 2.0 mm or more, and more preferably 4.0 mm or less, particularly 3.5 mm or less. In this embodiment, it is 3.2 mm.

  When the golf club head 1 hits a golf ball, the second recess 26 is provided along the sole-side edge 20d of the face main body 20. Is more easily bent on the sole side, and the resilience when hitting a golf ball is improved.

  Further, even if the ball is hit off-center in the face portion 21, the first concave portions 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 main body 20. In addition, the face portion 21 is easily bent, and a decrease in the flight distance can be suppressed.

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

  In this embodiment, the cross-sectional shape of the first concave portions 23 to 25 and the second concave portion 26 is an arc shape, but may be a polygonal shape such as a triangle or a quadrangle, a V-shape, or an asymmetrical shape.

DESCRIPTION OF SYMBOLS 1 Golf club head 10 Head main body 11 Face main body mounting part 12 Hozel 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 First concave part 26 Second recess

Claims (7)

An iron-type golf club head in which a concave portion is provided on a back surface of a face portion of the golf club head,
A first recess is arranged on the toe side, top side and heel side of the back surface,
A second recess is arranged on the sole side of the back surface,
A golf club head in which 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.
The golf club head includes a head body having a hosel portion, and a face body mounted on a front surface of the head body and including the face portion,
The face main body has a bottom portion that forms a part of a sole portion of the golf club head,
The golf club head according to claim 1, wherein the second recess is recessed toward the face surface and is recessed toward the sole at the bottom .   2. The golf club head according to claim 1, wherein the first recess is continuously arranged from the toe side to the heel side via the top 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 of the second concave portion. 5. 5. The golf club head according to claim 1, wherein the second recess is provided along a sole-side edge of the face body. 6.   6. The golf club head according to claim 1, wherein the second recess has an arc-shaped cross section. 7. The sole according to claim 1, wherein a bottom surface of the sole portion is provided with a groove extending in a toe-heel direction, and both ends of the groove in the toe-heel direction are closer to the ends. A golf club head approaching the side.

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