JP2014045871A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head for keeping ball shooting accuracy while improving repulsive force at a face portion when a golf ball is shot.SOLUTION: A groove 200 extending in a toe-heel direction is formed on the side of a face portion 120 in a sole portion 140, and an elastic member 210 is embedded in the groove 200. The elastic member 210 is molded by using a material with an elastic modulus smaller than that of the outer shell of a head 100, and fastened by screwing in a direction from the sole portion 140 to a crown portion 110. When a golf ball is shot by the head 100 configured in this way causes the face portion 120 to bend by the groove 200, to thereby improve repulsive force in the face portion 120. Besides, the elastic member 210 is embedded in the groove 200, so that a foreign matter such as lawn is restricted from being caught by the groove 200 in making a swing.

Description

  The present invention relates to a golf club head, and more particularly to a golf club head having an outer shell structure in which a space is formed in the outer shell.

  Conventionally, a high-repulsion golf club head for extending the flight distance has been desired. For example, a golf club head provided with a bent portion formed so as to reach the inside of the head rather than the face edge has been proposed ( For example, see Patent Document 1). In this golf club head, by providing a bent portion near the face, the bent portion can be bent at the time of hitting and the repulsion to the ball can be increased.

JP 2002-52099 A

  However, in a golf club in which such a bent portion is formed on the sole side, the bent portion of the sole may bite foreign matter such as lawn during a swing, and the swing trajectory may be disturbed, resulting in deterioration in hitting accuracy. As a result, the end of the bent portion may be worn.

  An object of the present invention is to provide a golf club head that maintains the hitting accuracy while increasing the repulsive force at the face portion when hitting.

  A golf club head according to an embodiment of the present invention is a golf club head having an outer shell structure in which a space is formed in the outer shell, and the first groove is formed in the toe-heel direction. And a sole portion in which an elastic member having a smaller elastic modulus than the outer shell is embedded in the first groove.

  According to various embodiments of the present invention, it is possible to provide a golf club head that maintains the hitting accuracy while increasing the repulsive force at the face portion when hitting.

Configuration diagram of a golf club provided with a golf club head according to an embodiment of the present invention 1 is an external view of a golf club head according to an embodiment of the present invention. A-A 'sectional view of the golf club head of FIG. An enlarged view of a part of the sectional view of FIG. The enlarged view of the part centering on the groove | channel 200 of a 1st modification The enlarged view of the part centering on the groove | channel 200 of a 2nd modification Explanatory drawing showing the center of gravity of the golf club head and the position of the sweet spot

  Hereinafter, various embodiments will be described with reference to the drawings as appropriate. In addition, the same referential mark is attached | subjected to the common component in drawing.

  FIG. 1 is a configuration diagram showing a configuration of a golf club provided with a golf club head according to an embodiment of the present invention. As shown in FIG. 1, a golf club 10 mainly includes a grip G, a shaft S coupled to the grip G, and a golf club head according to the present embodiment coupled to the shaft S via a hosel HZ (hereinafter referred to as a golf club head). Simply “head”).

  The head 100 of the illustrated embodiment is formed as a hollow outer shell structure having a space in the outer shell by a metal material such as stainless steel, titanium, titanium alloy or the like. As shown in FIG. 2, the head 100 forms a crown portion 110 that forms the top surface of the head 100, a face portion 120 that is a ball striking surface, a toe side portion 130, a heel side portion 135, and a bottom surface. A sole portion 140, a back portion 150 opposite to the face portion 120, and a hosel support portion 20 formed in a cylindrical shape connected to the shaft S via the hosel HZ.

  FIG. 3 is a cross-sectional view of the head 100 shown in FIG. As shown in the figure, a groove 200 extending in a direction connecting the toe side portion 130 and the heel side portion 135 is formed on the face portion 120 side of the sole portion 140, and an elastic member 210 is embedded in the groove 200. Yes. The elastic member 210 is molded using a material having a smaller elastic modulus than the outer shell of the head 100 and is screwed (not shown) in the direction from the sole portion 140 to the crown portion 110. The elastic member 210 may be fixed not by screwing but by adhesion, for example, by using an adhesive such as Bond G17 (manufactured by Konishi Co., Ltd.). The elastic member 210 can be molded using, for example, synthetic rubber (for example, acrylic rubber, urethane rubber, silicone rubber, tungsten rubber, etc.) or synthetic resin (for example, acrylic resin, vinyl chloride resin, epoxy resin, etc.). A cover plate 220 is bonded to the exposed surface of the elastic member 210, and it is preferable to use a plate having excellent wear resistance such as stainless steel, titanium alloy, or an electroformed nameplate for decoration. . The groove 200 is formed at a position where at least a part thereof is displaced from the center of gravity of the head 100 to the face portion 120.

  FIG. 4 is an enlarged view of a portion around the groove 200 in the cross-sectional view of FIG. As shown in the figure, a groove 202 having a depth in the direction of the crown portion 110 is formed in the groove 200 on the face portion 120 side, and the elastic member 210 is adapted to the shape of the entire groove 200 including the groove 202. Molded. By molding the elastic member 210 into a shape that fits the groove 202, it is possible to suppress the elastic member 210 from dropping due to an impact at the time of hitting. In addition, it is preferable that the bottom surface of the groove 202 has an R shape without being rounded, and thereby, it is possible to prevent the groove 202 from being damaged due to stress concentration during hitting.

  In the embodiment shown in FIG. 4, the bottom surface of the sole portion 140 and the bottom surface (cover plate 220) of the elastic member 210 are formed to be substantially flush with each other, but a step may be provided on both bottom surfaces. FIGS. 5 and 6 are examples in which a step is provided so that the bottom surface of the elastic member 210 is retracted inward of the head 100 from the bottom surface of the sole portion 140. In the example of FIG. 5, as shown in the figure, the edge 206 of the groove 200 is formed in an R shape to suppress wear of the edge 206. In this case, the step L is preferably 1.5 mm or less, and the radius of the R shape is preferably in the range of 0.5 to 1.5 mm. In the example of FIG. 6, as illustrated, the edge 206 of the groove 200 is inclined (the edge 206 has a tapered shape) to suppress wear of the edge 206. In this case, the step L is preferably 1.5 mm or less, and the inclination angle d with respect to the bottom surface of the sole portion 140 is preferably around 45 ° (in the range of 35-55 °).

  Here, a change in the center of gravity of the head 100 by embedding the elastic member 210 will be described. 7 compares the positions of the center of gravity G of the head 100 and the sweet spot SS when the elastic member 210 is not embedded in the groove 200 of the sole portion 140 (left side in the figure) and when it is embedded (right side in the figure). FIG. As shown in the figure, the position of the center of gravity G of the head 100 in which the elastic member 210 is embedded is further compared to the position of the center of gravity G of the head 100b in which the elastic member 210 is not embedded. The position approaches 140. The sweet spot SS that is the most suitable position for hitting the hitting surface of the face portion 120 exists around the intersection of the imaginary line extending perpendicularly from the center of gravity G to the face portion 120 and the face portion 120. Further, the face portion 120 has a loft angle. Therefore, the sweet spot SS becomes lower as the position of the center of gravity G approaches the face part 120 and the sole part 140. In particular, in a driver or a fairway wood, the back portion 150 of the head 100 is likely to increase in size, and as a result, the center of gravity tends to be biased toward the back portion 150, so that the center of gravity G is brought closer to the face portion 120 and the sole portion 140 by the elastic member 210. Lowering the position of the sweet spot SS) can optimize the position of the sweet spot, reduce the backspin amount of the ball at the time of hitting, and improve the flight distance. This point becomes noticeable with fairway wood having a relatively large loft angle. By forming the elastic member 210 from a high specific gravity rubber such as tungsten rubber, the center of gravity G can be positioned more efficiently near the face portion 120 and the sole portion 140.

  When a golf ball is hit with the head 100 configured in this manner, the face portion 120 is bent by the groove 200 and the repulsive force at the face portion 120 is improved. Further, since the elastic member 210 is embedded in the groove 200, the sole portion 140 does not bite the lawn during the swing, and as a result, the influence on the swing track can be reduced.

  As described above, according to the embodiment of the present invention, the groove 200 in the toe-heel direction is formed on the face portion 120 side of the sole portion 140, and the elastic member 210 is embedded in the groove 200. The repulsive force in the face portion 120 can be improved by the bending of the face portion 120, and the hitting accuracy at the time of swing such that the groove 200 bites the lawn hardly occurs. Further, since the center of gravity of the head 100 approaches the face portion 120 and the sole portion 140 side by the elastic member 210, the sweet spot can be prevented from being biased upward.

  In the embodiment, the groove 202 having a depth in the crown part 110 direction is formed on the face part 120 side of the groove 200, but the groove 202 may not be formed on the face part 120 side. Further, such a groove 202 is not necessarily formed.

  Of course, the present invention is not limited to the above-described embodiments, and can be implemented in various modes belonging to the technical scope of the present invention.

100 golf club head (head)
110 Crown part 120 Face part 140 Sole part 150 Back part 200, 202 Groove 210 Elastic member

Claims (4)

A golf club head having an outer shell structure in which a space is formed in the outer shell,
A golf club head comprising: a first groove formed in a toe-heel direction; and a sole portion in which an elastic member having an elastic modulus smaller than that of the outer shell is embedded in the formed first groove.   The golf club head according to claim 1, wherein the first groove is formed closer to the face side than the center of gravity of the golf club head.   The golf club head according to claim 1, wherein the first groove has a second groove formed in a toe-heel direction.   4. The golf club head according to claim 3, wherein the second groove has a depth in the crown portion direction and is formed on the face portion side of the first groove.

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