US20210187366A1 - Golf club head - Google Patents
Golf club head Download PDFInfo
- Publication number
- US20210187366A1 US20210187366A1 US17/104,429 US202017104429A US2021187366A1 US 20210187366 A1 US20210187366 A1 US 20210187366A1 US 202017104429 A US202017104429 A US 202017104429A US 2021187366 A1 US2021187366 A1 US 2021187366A1
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- United States
- Prior art keywords
- golf club
- club head
- metal member
- crown
- face
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0466—Heads wood-type
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/0437—Heads with special crown configurations
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B53/00—Golf clubs
- A63B53/04—Heads
- A63B53/045—Strengthening ribs
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/52—Details or accessories of golf clubs, bats, rackets or the like with slits
Definitions
- the present invention relates to a golf club head.
- Japanese Patent Laid-Open No. 2003-205054 proposes a gold club head obtained by joining a part including a face portion, a hosel portion, and a crown portion, and a part including a sole portion and aside portion.
- Japanese Patent No. 4000797 proposes a golf club head obtained by joining a part including a face portion and a crown portion, and a part including a sole portion, a hosel portion, and a side portion.
- Casting is widely used as a method of manufacturing parts of a golf club head. Casting has an advantage in that the degree of freedom in the shape of a part is high, but it is disadvantageous in homogenization and thinning. If the launch angle of a golf ball at the time of striking the ball is large, an increase in carry of a shot can be expected. If the upper portion of the face portion and the crown portion are easily bent at the time of striking the ball, this is advantageous in increasing the launch angle. In order to allow the upper portion of the face portion and the crown portion to be easily bent, homogenization and thinning are required. If the face portion and the crown portion are molded by casting, this is disadvantageous in terms of homogenization and thinning.
- a hollow golf club head that includes a face portion, a crown portion, a sole portion, a side portion, and a hosel portion, comprising:
- a first metal member configured to form the face portion and at least a part of the crown portion
- a second metal member configured to form the sole portion, the side portion, and the hosel portion, and to which the first metal member is joined
- the first metal member is a forged member including at least one groove portion
- the second metal member is a cast member including at least one reinforcing rib.
- FIG. 1 is a perspective view of a golf club head according to an embodiment of the present invention
- FIG. 2 is a plan view of the golf club head shown in FIG. 1
- FIG. 3 is a bottom view of the golf club head shown in FIG. 1 ;
- FIG. 4 is an exploded perspective view of the golf club head shown in FIG. 1 ;
- FIG. 5 is another exploded perspective view of the golf club head shown in FIG. 1 ;
- FIG. 6A is a sectional view taken along a line A-A in FIG. 2 ;
- FIG. 6B is a view showing the relationship between the contour line and the joining line of the golf club head
- FIG. 7 is a view showing another arrangement example of reinforcing ribs
- FIG. 8 is a view showing still another arrangement example of the reinforcing ribs
- FIG. 9 is a view showing still another arrangement example of the reinforcing ribs.
- FIG. 10 is a bottom view of a golf club head showing an example of a constraining structure of a face portion
- FIG. 11 is a sectional view taken along a lineB-B in FIG. 10 .
- FIG. 1 is a perspective view of a golf club head 1 according to an embodiment of the preset invention
- FIG. 2 is a plan view (a view when viewed from the side of a crown portion 12 ) of the golf club head 1
- FIG. 3 is a bottom view (a view when viewed from the side of a sole portion 13 ) of the golf club head 1 .
- the golf club head 1 is a hollow member, and its peripheral walls forma face portion 11 , the crown portion 12 , the sole portion 13 , and a side portion 14 .
- the surface (front surface) of the face portion 11 forms a face surface (striking surface). A bulge and a roll can be formed on the face surface.
- the crown portion 12 forms the upper portion of the golf club head 1 .
- the sole portion 13 forms the bottom portion of the golf club head 1 .
- the side portion 14 forms the portion between the sole portion 13 and the crown portion 12 .
- the golf club head 1 also includes a hosel portion 15 to which a shaft is inserted.
- an arrow D 1 indicates a face-back direction
- reference symbols F and B indicate the side of the face portion and the back side, respectively.
- An arrow D 2 indicates a toe-heel direction
- reference symbols T and H indicate the toe side and the heel side, respectively.
- the face-back direction is, for example, a target line direction (the target direction of a shot).
- the toe-heel direction is, for example, a direction in which the toe-side end and the heel-side end of the sole portion 14 are coupled, and has an approximately orthogonal relationship to the target line direction.
- the golf club head 1 is a golf club head for a driver.
- the present invention is applicable to hollow golf club heads including those for fairway woods and the like other than those for drivers.
- FIG. 6A is a sectional view of the crown portion 12 taken along a line A-A in FIG. 2 .
- a groove portion 21 and a groove portion 22 are formed in the crown portion 12 as thin-walled portions thinner than the surroundings. Both the groove portion 21 and the groove portion 22 are extended in a direction intersecting the D 1 direction, and particularly in this embodiment, extended in the D 2 direction. Since the groove portion 21 and the groove portion 22 are formed, the crown portion 12 is easily bent in the D 1 direction at the time of striking a ball. Accordingly, the upper portion of the face portion 11 is easily bent toward the back side at the time of striking a ball, so that the launch angle of a ball can be increased.
- the effect of increasing the launch angle can be obtained by forming one groove portion 21 or one groove portion 22 . However, by forming a plurality of groove portions 21 and 22 as in this embodiment, the further effect of increasing the launch angle can be obtained.
- the groove portion 21 is formed in the outer surface of the crown portion 12
- the groove portion 22 is formed in the inner surface of the crown portion 12 .
- the groove portion 21 also contributes to improvement of the design of the golf club head 1 .
- the groove portion 22 cannot be visually recognized on the appearance of the golf club head 1 , and this can also appeal the existence of a hidden function to golfers.
- both the groove portion 21 and the groove portion 22 may be formed in the outer surface of the crown portion 12 , or both may be formed in the inner surface of the crown portion 12 .
- the groove portion 22 is formed on the backside of the groove portion 21 when viewed in the D direction.
- the ease of bending near the boundary portion between the face portion 11 and the crown portion 12 can be improved.
- the groove portion 21 is readily included in the field of view of a golfer when the golfer is at the address position. This makes it easier for the golfer to expect the effect of bending caused by the groove portion 21 . Since the groove portion 22 is formed on the back side, the crown portion 12 can be easily bent as a whole.
- the edge of the groove portion 21 on the face portion 11 side is a straight edge extending parallel to the face portion 11 .
- the golfer can easily direct the face portion 11 to a target direction while using the groove portion 21 as an index.
- the groove portion 21 is wider in both end portions in the D 2 direction than in the central portion.
- the tow side and the heel side are more easily bent toward the back side than the center, so that it is possible to obtain the more uniform carry performance regardless of the ball striking position on the face portion 11 .
- the groove portion 22 extends in a belt shape with a constant width in the D 2 direction. At the time of striking a ball, the central portion of the crown portion 12 in the D 1 direction can be more uniformly bent in the D 1 direction.
- the groove portion 22 may be formed so as to cross the crown portion 12 in the D 2 direction.
- the wall thickness of the crown portion 12 is, for example, in a range of 0.3 to 0.8 mm, and particularly in a range of 0.3 to 0.6 mm in terms of ease of bending.
- the depth of each of the groove portion 21 and the groove portion 22 is, for example, 1 ⁇ 2 to 1 ⁇ 6 of the wall thickness of the crown portion 12 .
- the golf club head 1 of this embodiment is manufactured by joining a plurality of members.
- FIGS. 4 and 5 is an exploded perspective view of the golf club head 1 .
- the golf club head 1 is manufactured by joining a metal member 2 and a metal member 3 .
- the joining method is welding in this embodiment.
- the metal materials of the metal members 2 and 3 are a titanium-based metal (for example, titanium alloy 6Al-4V-Ti), a ferrous metal, stainless steel, an aluminum alloy, and a copper alloy such as beryllium copper.
- the metal member 2 and the metal member 3 may be the same metal material or different metal materials.
- the metal member 2 is a member forming the face portion 11 and the crown portion 12 , and includes the groove portions 21 and 22 formed in the crown portion 12 .
- the groove portion 21 and the groove portion 22 may be formed during forming the metal member 2 by forging.
- the groove portion 21 and the groove portion 22 may be formed by machining or laser processing after a forged member without the groove portion 21 and the groove portion 22 is formed.
- the metal member 2 forms the entire crown portion 12 except the periphery of the hosel portion 15 .
- the metal member 2 may form a part of the crown portion 12 , and in this case, the metal member 2 may form a part of the crown portion 12 on the face portion 11 side.
- the metal member 3 is a member forming the sole portion 13 , the side portion 14 , and the hosel portion 15 .
- the metal member 3 includes a reinforcing rib 31 and a reinforcing rib 32 on its inner surface.
- the reinforcing rib 31 is formed in the sole portion 13 , and particularly, formed in the boundary portion between the sole portion 13 and the face portion 11 so as to cross them.
- the reinforcing rib 31 makes it easier to constrain the lower portion of the face portion 11 . As a result, it is possible to allow the upper portion of the face portion 11 to be easily bent at the time of striking a ball while ensuring the rigidity of the face portion 11 .
- the reinforcing rib 32 is formed in the back-side side portion 14 , and particularly, formed in the boundary portion between the side portion 14 and the crown portion 12 so as to cross them.
- the reinforcing rib 32 makes it easier to constrain the back-side portion of the crown portion 12 . As a result, it is possible to allow the crown portion 12 to be easily bent toward the back side at the time of striking a ball.
- the metal member 3 also includes, on its inner surface, a reinforcing rib 41 provided so as to bridge over the tow-side side portion 14 and the heel-side side portion 14 .
- the reinforcing rib 41 improves the rigidity of the golf club head 1 in the D 2 direction.
- a device 16 for replacing the shaft and adjusting the orientation of the golf club head 1 with respect to the shaft is attached to the hosel portion 15 of the metal member 3 .
- the metal member 2 is formed as a single part by forging it from a metal plate serving as a raw material, and the metal member 3 is integrally molded as a single part by casting.
- Forging is more advantageous than casting in terms of homogenization and thinning of members.
- casting has an advantage in that the degree of freedom in the shape of a part is higher than in forging.
- the crown portion 12 can be formed thinner and uniform. Further, since the metal member 2 includes the crown portion 12 and the face portion 11 , there is no welded joining portion at the boundary portion between them. If there is a joining portion, the rigidity is partially increased, and the bending performance at the time of striking a ball is decreased. In this embodiment, it is possible to give appropriate rigidity to the boundary portion between the crown portion 12 and the face portion 11 .
- a cast member as the metal member 3 , complicated molding is possible, and the reinforcing ribs 31 , 32 , and 41 and the design shape of the outer surface of the sole portion 13 can be integrally molded.
- the joining line extends in the boundary portion between the crown portion 12 and the side portion 14 . Since the rigidity is partially increased when there is a joining portion, the crown portion 12 has a property that the rigidity is high at its peripheral edge and low inside the peripheral edge. As a result, the crown portion 12 is more easily bent at the time of striking a ball.
- FIG. 6B is a view showing the relationship between a contour line L 1 in a planar view of the golf club head 1 and a joining line L 2 between the metal member 2 and the metal member 3 .
- the planar view of the golf club head 1 is a planar view when the golf club head 1 is set on a horizontal plane in accordance with a predetermined lie angle and a predetermined loft angle.
- the contour line L 1 is shown by a solid line, and the hosel portion 15 is omitted.
- the joining line L 2 is shown by a dashed line. In this embodiment, the joining line L 2 is one continuous joining line, and is along the contour line L 1 except in the periphery of the hosel portion 15 .
- the joining line L 2 is preferably along the range of 70% or more of the contour line, and more preferably along the range of 90% or more.
- FIG. 7 is a view showing another arrangement example of a sole portion 13 formed by a metal member 3 (a hosel portion 15 and the like are omitted), and shows an example in which a plurality of reinforcing ribs 33 are formed in a grid pattern on the inner surface of the sole portion 13 .
- the rigidity of the sole portion 13 can be improved.
- the reinforcing rib may be formed on the outer surface of the metal member 3 .
- FIG. 8 shows an example.
- a plurality of reinforcing ribs 34 are formed in a row in a D 2 direction in the end portion, on the side of a face portion 11 , of the sole portion 13 formed by the metal member 3 .
- the reinforcing ribs 34 can increase the degree of constraint of the lower portion of the face portion 11 , thereby allowing the upper portion of the face portion 11 to be easily bent at the time of striking a ball.
- FIG. 9 shows an example in which reinforcing ribs 35 are formed on the outer surface of the metal member 3 .
- a plurality of the ribs 35 each extending in a D 1 direction are formed in the D 2 direction on the outer surface of the sole portion 13 formed by the metal member 3 .
- the reinforcing ribs 35 can improve the rigidity of the sole portion 13 in the D 1 direction and increase the degree of constraint of the lower portion of the face portion 11 , thereby allowing the upper portion of the face portion 11 to be easily bent at the time of striking a ball.
- FIG. 10 is a bottom view of a golf club head 1 in this embodiment
- FIG. 11 is a sectional view taken along a line B-B in FIG. 10
- a concave portion 13 a is provided in a sole portion 13
- the wall portion of the concave portion 13 a is a mounting portion of an abutment member 4 .
- the abutment member 4 is a shaft-shaped member that abuts against a back surface (inner surface) 11 a of a face portion 11 .
- the abutment member 4 abuts against the back surface 11 a at the lower portion of the face portion 11 , and particularly below the face center. Since the abutment member 4 abuts against the lower portion (the side of a sole portion 14 ) of the face portion 11 , the deformation of the lower portion of the face portion 14 is constrained more than the upper portion. This contributes to an increase in launch angle of a ball at the time of striking the ball.
- the face center can be specified by, for example, an impact point template used when measuring the CT value of the face portion.
- the abutment member 4 includes a non-metal distal end portion 41 that abuts against the back surface 1 a of the face portion 11 , a metal screw shaft 42 that is fixed to a screw hole 13 b of the concave portion 13 a , and a metal head portion 40 .
- a non-metal material which forms the distal end portion 41 are, for example, a resin, rubber, and FRP.
- a metal material which forms the head portion 40 and the screw shaft 42 are, for example, aluminum, magnesium, titanium, iron, and tungsten.
- the abutment member 4 can adjust the degree of abutment (degree of pressing) with respect to the back surface 11 a by adjusting the screwing amount of the screw shaft 42 into the screw hole 13 b .
- the fixing structure of the abutment member 4 is not limited to the screw structure, and may be another fixing structure such as press fitting, adhesion, welding, caulking, or the like.
Abstract
Description
- This application claims priority to and the benefit of Japanese Patent Application No. 2019-230580 filed on Dec. 20, 2019, the entire disclosure of which is incorporated herein by reference.
- The present invention relates to a golf club head.
- There has been proposed a technique of manufacturing a hollow golf club head by joining a plurality of parts. Japanese Patent Laid-Open No. 2003-205054 proposes a gold club head obtained by joining a part including a face portion, a hosel portion, and a crown portion, and a part including a sole portion and aside portion. Japanese Patent No. 4000797 proposes a golf club head obtained by joining a part including a face portion and a crown portion, and a part including a sole portion, a hosel portion, and a side portion.
- Casting is widely used as a method of manufacturing parts of a golf club head. Casting has an advantage in that the degree of freedom in the shape of a part is high, but it is disadvantageous in homogenization and thinning. If the launch angle of a golf ball at the time of striking the ball is large, an increase in carry of a shot can be expected. If the upper portion of the face portion and the crown portion are easily bent at the time of striking the ball, this is advantageous in increasing the launch angle. In order to allow the upper portion of the face portion and the crown portion to be easily bent, homogenization and thinning are required. If the face portion and the crown portion are molded by casting, this is disadvantageous in terms of homogenization and thinning.
- It is an object of the present invention to provide a golf club head that promotes an increase in launch angle at the time of striking a golf ball.
- According to an aspect of the preset invention, there is provided a hollow golf club head that includes a face portion, a crown portion, a sole portion, a side portion, and a hosel portion, comprising:
- a first metal member configured to form the face portion and at least a part of the crown portion; and
- a second metal member configured to form the sole portion, the side portion, and the hosel portion, and to which the first metal member is joined,
- wherein the first metal member is a forged member including at least one groove portion, and
- the second metal member is a cast member including at least one reinforcing rib.
- Further features of the present invention will become apparent from the following description of exemplary embodiments (with reference to the attached drawings).
-
FIG. 1 is a perspective view of a golf club head according to an embodiment of the present invention; -
FIG. 2 is a plan view of the golf club head shown inFIG. 1 -
FIG. 3 is a bottom view of the golf club head shown inFIG. 1 ; -
FIG. 4 is an exploded perspective view of the golf club head shown inFIG. 1 ; -
FIG. 5 is another exploded perspective view of the golf club head shown inFIG. 1 ; -
FIG. 6A is a sectional view taken along a line A-A inFIG. 2 ; -
FIG. 6B is a view showing the relationship between the contour line and the joining line of the golf club head; -
FIG. 7 is a view showing another arrangement example of reinforcing ribs; -
FIG. 8 is a view showing still another arrangement example of the reinforcing ribs; -
FIG. 9 is a view showing still another arrangement example of the reinforcing ribs; -
FIG. 10 is a bottom view of a golf club head showing an example of a constraining structure of a face portion; and -
FIG. 11 is a sectional view taken along a lineB-B inFIG. 10 . - Hereinafter, embodiments will be described in detail with reference to the attached drawings. Note that the following embodiments are not intended to limit the scope of the claimed invention, and limitation is not made an invention that requires all combinations of features described in the embodiments. Two or more of the multiple features described in the embodiments may be combined as appropriate. Furthermore, the same reference numerals are given to the same or similar configurations, and redundant description thereof is omitted.
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FIG. 1 is a perspective view of a golf club head 1 according to an embodiment of the preset invention,FIG. 2 is a plan view (a view when viewed from the side of a crown portion 12) of the golf club head 1, andFIG. 3 is a bottom view (a view when viewed from the side of a sole portion 13) of the golf club head 1. - The golf club head 1 is a hollow member, and its peripheral walls forma
face portion 11, thecrown portion 12, thesole portion 13, and aside portion 14. The surface (front surface) of theface portion 11 forms a face surface (striking surface). A bulge and a roll can be formed on the face surface. Thecrown portion 12 forms the upper portion of the golf club head 1. Thesole portion 13 forms the bottom portion of the golf club head 1. Theside portion 14 forms the portion between thesole portion 13 and thecrown portion 12. The golf club head 1 also includes ahosel portion 15 to which a shaft is inserted. - In each drawing, an arrow D1 indicates a face-back direction, and reference symbols F and B indicate the side of the face portion and the back side, respectively. An arrow D2 indicates a toe-heel direction, and reference symbols T and H indicate the toe side and the heel side, respectively. The face-back direction is, for example, a target line direction (the target direction of a shot). The toe-heel direction is, for example, a direction in which the toe-side end and the heel-side end of the
sole portion 14 are coupled, and has an approximately orthogonal relationship to the target line direction. - The golf club head 1 is a golf club head for a driver. However, the present invention is applicable to hollow golf club heads including those for fairway woods and the like other than those for drivers.
- Referring to
FIGS. 2 and 6A ,FIG. 6A is a sectional view of thecrown portion 12 taken along a line A-A inFIG. 2 . Agroove portion 21 and agroove portion 22 are formed in thecrown portion 12 as thin-walled portions thinner than the surroundings. Both thegroove portion 21 and thegroove portion 22 are extended in a direction intersecting the D1 direction, and particularly in this embodiment, extended in the D2 direction. Since thegroove portion 21 and thegroove portion 22 are formed, thecrown portion 12 is easily bent in the D1 direction at the time of striking a ball. Accordingly, the upper portion of theface portion 11 is easily bent toward the back side at the time of striking a ball, so that the launch angle of a ball can be increased. The effect of increasing the launch angle can be obtained by forming onegroove portion 21 or onegroove portion 22. However, by forming a plurality ofgroove portions - In this embodiment, the
groove portion 21 is formed in the outer surface of thecrown portion 12, and thegroove portion 22 is formed in the inner surface of thecrown portion 12. Thegroove portion 21 also contributes to improvement of the design of the golf club head 1. Thegroove portion 22 cannot be visually recognized on the appearance of the golf club head 1, and this can also appeal the existence of a hidden function to golfers. Note that both thegroove portion 21 and thegroove portion 22 may be formed in the outer surface of thecrown portion 12, or both may be formed in the inner surface of thecrown portion 12. - As for the
groove portions groove portion 22 is formed on the backside of thegroove portion 21 when viewed in the D direction. By forming thegroove portion 21 near theface portion 11, the ease of bending near the boundary portion between theface portion 11 and thecrown portion 12 can be improved. In addition, by forming thegroove portion 21 near theface portion 11, thegroove portion 21 is readily included in the field of view of a golfer when the golfer is at the address position. This makes it easier for the golfer to expect the effect of bending caused by thegroove portion 21. Since thegroove portion 22 is formed on the back side, thecrown portion 12 can be easily bent as a whole. - The edge of the
groove portion 21 on theface portion 11 side is a straight edge extending parallel to theface portion 11. When a golfer is at the address position, the golfer can easily direct theface portion 11 to a target direction while using thegroove portion 21 as an index. Thegroove portion 21 is wider in both end portions in the D2 direction than in the central portion. Of theface portion 11, the tow side and the heel side are more easily bent toward the back side than the center, so that it is possible to obtain the more uniform carry performance regardless of the ball striking position on theface portion 11. - In the central portion of the
crown portion 12 in the D1 direction, thegroove portion 22 extends in a belt shape with a constant width in the D2 direction. At the time of striking a ball, the central portion of thecrown portion 12 in the D1 direction can be more uniformly bent in the D1 direction. Thegroove portion 22 may be formed so as to cross thecrown portion 12 in the D2 direction. - The wall thickness of the
crown portion 12 is, for example, in a range of 0.3 to 0.8 mm, and particularly in a range of 0.3 to 0.6 mm in terms of ease of bending. The depth of each of thegroove portion 21 and thegroove portion 22 is, for example, ½ to ⅙ of the wall thickness of thecrown portion 12. - The golf club head 1 of this embodiment is manufactured by joining a plurality of members. Each of
FIGS. 4 and 5 is an exploded perspective view of the golf club head 1. The golf club head 1 is manufactured by joining ametal member 2 and ametal member 3. The joining method is welding in this embodiment. Examples of the metal materials of themetal members metal member 2 and themetal member 3 may be the same metal material or different metal materials. - The
metal member 2 is a member forming theface portion 11 and thecrown portion 12, and includes thegroove portions crown portion 12. Thegroove portion 21 and thegroove portion 22 may be formed during forming themetal member 2 by forging. Alternatively, thegroove portion 21 and thegroove portion 22 may be formed by machining or laser processing after a forged member without thegroove portion 21 and thegroove portion 22 is formed. - In this embodiment, the
metal member 2 forms theentire crown portion 12 except the periphery of thehosel portion 15. However, themetal member 2 may form a part of thecrown portion 12, and in this case, themetal member 2 may form a part of thecrown portion 12 on theface portion 11 side. - The
metal member 3 is a member forming thesole portion 13, theside portion 14, and thehosel portion 15. In this embodiment, themetal member 3 includes a reinforcingrib 31 and a reinforcingrib 32 on its inner surface. The reinforcingrib 31 is formed in thesole portion 13, and particularly, formed in the boundary portion between thesole portion 13 and theface portion 11 so as to cross them. The reinforcingrib 31 makes it easier to constrain the lower portion of theface portion 11. As a result, it is possible to allow the upper portion of theface portion 11 to be easily bent at the time of striking a ball while ensuring the rigidity of theface portion 11. - The reinforcing
rib 32 is formed in the back-side side portion 14, and particularly, formed in the boundary portion between theside portion 14 and thecrown portion 12 so as to cross them. The reinforcingrib 32 makes it easier to constrain the back-side portion of thecrown portion 12. As a result, it is possible to allow thecrown portion 12 to be easily bent toward the back side at the time of striking a ball. - The
metal member 3 also includes, on its inner surface, a reinforcingrib 41 provided so as to bridge over the tow-side side portion 14 and the heel-side side portion 14. The reinforcingrib 41 improves the rigidity of the golf club head 1 in the D2 direction. Adevice 16 for replacing the shaft and adjusting the orientation of the golf club head 1 with respect to the shaft is attached to thehosel portion 15 of themetal member 3. - In this embodiment, the
metal member 2 is formed as a single part by forging it from a metal plate serving as a raw material, and themetal member 3 is integrally molded as a single part by casting. Forging is more advantageous than casting in terms of homogenization and thinning of members. On the other hand, casting has an advantage in that the degree of freedom in the shape of a part is higher than in forging. - By using a forged member as the
metal member 2, thecrown portion 12 can be formed thinner and uniform. Further, since themetal member 2 includes thecrown portion 12 and theface portion 11, there is no welded joining portion at the boundary portion between them. If there is a joining portion, the rigidity is partially increased, and the bending performance at the time of striking a ball is decreased. In this embodiment, it is possible to give appropriate rigidity to the boundary portion between thecrown portion 12 and theface portion 11. By using a cast member as themetal member 3, complicated molding is possible, and the reinforcingribs sole portion 13 can be integrally molded. - Since the
metal member 2 forms approximately the entire area of thecrown portion 12, when themetal member 2 and themetal member 3 are joined, the joining line extends in the boundary portion between thecrown portion 12 and theside portion 14. Since the rigidity is partially increased when there is a joining portion, thecrown portion 12 has a property that the rigidity is high at its peripheral edge and low inside the peripheral edge. As a result, thecrown portion 12 is more easily bent at the time of striking a ball. -
FIG. 6B is a view showing the relationship between a contour line L1 in a planar view of the golf club head 1 and a joining line L2 between themetal member 2 and themetal member 3. The planar view of the golf club head 1 is a planar view when the golf club head 1 is set on a horizontal plane in accordance with a predetermined lie angle and a predetermined loft angle. The contour line L1 is shown by a solid line, and thehosel portion 15 is omitted. The joining line L2 is shown by a dashed line. In this embodiment, the joining line L2 is one continuous joining line, and is along the contour line L1 except in the periphery of thehosel portion 15. The higher the proportion of the joining line L2 along the contour line L1, the more the joining portion is located on the envelopes of theface portion 11 and thecrown portion 12, and the joining portion does not exist inside the envelopes. That is, the rigidity is improved by the joining portion on the envelopes of theface portion 11 and thecrown portion 12, and the rigidity is decreased inside the envelopes. As a result, the upper portion of theface portion 11 and thecrown portion 12 are easily bent toward the back side at the time of striking a ball, so that the launch angle of the ball can be increased. The joining line L2 is preferably along the range of 70% or more of the contour line, and more preferably along the range of 90% or more. - Another arrangement example can be adopted as the reinforcing
ribs metal member 3.FIG. 7 is a view showing another arrangement example of asole portion 13 formed by a metal member 3 (ahosel portion 15 and the like are omitted), and shows an example in which a plurality of reinforcingribs 33 are formed in a grid pattern on the inner surface of thesole portion 13. The rigidity of thesole portion 13 can be improved. - The reinforcing rib may be formed on the outer surface of the
metal member 3.FIG. 8 shows an example. In the illustrated example, a plurality of reinforcingribs 34 are formed in a row in a D2 direction in the end portion, on the side of aface portion 11, of thesole portion 13 formed by themetal member 3. The reinforcingribs 34 can increase the degree of constraint of the lower portion of theface portion 11, thereby allowing the upper portion of theface portion 11 to be easily bent at the time of striking a ball. -
FIG. 9 shows an example in which reinforcingribs 35 are formed on the outer surface of themetal member 3. In the illustrated example, a plurality of theribs 35 each extending in a D1 direction are formed in the D2 direction on the outer surface of thesole portion 13 formed by themetal member 3. The reinforcingribs 35 can improve the rigidity of thesole portion 13 in the D1 direction and increase the degree of constraint of the lower portion of theface portion 11, thereby allowing the upper portion of theface portion 11 to be easily bent at the time of striking a ball. - Another member that constrains the lower portion of the
face portion 11 may be provided.FIG. 10 is a bottom view of a golf club head 1 in this embodiment, andFIG. 11 is a sectional view taken along a line B-B inFIG. 10 . Aconcave portion 13 a is provided in asole portion 13, and the wall portion of theconcave portion 13 a is a mounting portion of an abutment member 4. - The abutment member 4 is a shaft-shaped member that abuts against a back surface (inner surface) 11 a of a
face portion 11. The abutment member 4 abuts against theback surface 11 a at the lower portion of theface portion 11, and particularly below the face center. Since the abutment member 4 abuts against the lower portion (the side of a sole portion 14) of theface portion 11, the deformation of the lower portion of theface portion 14 is constrained more than the upper portion. This contributes to an increase in launch angle of a ball at the time of striking the ball. Note that the face center can be specified by, for example, an impact point template used when measuring the CT value of the face portion. - The abutment member 4 includes a non-metal
distal end portion 41 that abuts against the back surface 1 a of theface portion 11, ametal screw shaft 42 that is fixed to ascrew hole 13 b of theconcave portion 13 a, and ametal head portion 40. Examples of a non-metal material which forms thedistal end portion 41 are, for example, a resin, rubber, and FRP. Examples of a metal material which forms thehead portion 40 and thescrew shaft 42 are, for example, aluminum, magnesium, titanium, iron, and tungsten. The abutment member 4 can adjust the degree of abutment (degree of pressing) with respect to theback surface 11 a by adjusting the screwing amount of thescrew shaft 42 into thescrew hole 13 b. Note that the fixing structure of the abutment member 4 is not limited to the screw structure, and may be another fixing structure such as press fitting, adhesion, welding, caulking, or the like. - The invention is not limited to the foregoing embodiments, and various variations/changes are possible within the spirit of the invention.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019-230580 | 2019-12-20 | ||
JP2019230580A JP2021097821A (en) | 2019-12-20 | 2019-12-20 | Golf club head |
Publications (1)
Publication Number | Publication Date |
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US20210187366A1 true US20210187366A1 (en) | 2021-06-24 |
Family
ID=76437931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/104,429 Abandoned US20210187366A1 (en) | 2019-12-20 | 2020-11-25 | Golf club head |
Country Status (2)
Country | Link |
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US (1) | US20210187366A1 (en) |
JP (1) | JP2021097821A (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030114244A1 (en) * | 2001-09-20 | 2003-06-19 | Bridgestone Sports Co., Ltd. | Golf club head |
US20040092333A1 (en) * | 2002-11-12 | 2004-05-13 | Callaway Golf Company | Golf club head with a face insert |
US20130344987A1 (en) * | 2012-06-22 | 2013-12-26 | Bridgestone Sports Co., Ltd. | Hollow golf club head and method of manufacturing the same |
US20180161644A1 (en) * | 2016-12-08 | 2018-06-14 | Bridgestone Sports Co., Ltd. | Golf club head |
US20190091526A1 (en) * | 2014-10-24 | 2019-03-28 | Karsten Manufacturing Corporation | Golf club heads with energy storage features |
US20190247724A1 (en) * | 2018-02-09 | 2019-08-15 | Sumitomo Rubber Industries, Ltd. | Golf club head |
-
2019
- 2019-12-20 JP JP2019230580A patent/JP2021097821A/en active Pending
-
2020
- 2020-11-25 US US17/104,429 patent/US20210187366A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030114244A1 (en) * | 2001-09-20 | 2003-06-19 | Bridgestone Sports Co., Ltd. | Golf club head |
US20040092333A1 (en) * | 2002-11-12 | 2004-05-13 | Callaway Golf Company | Golf club head with a face insert |
US20130344987A1 (en) * | 2012-06-22 | 2013-12-26 | Bridgestone Sports Co., Ltd. | Hollow golf club head and method of manufacturing the same |
US20190091526A1 (en) * | 2014-10-24 | 2019-03-28 | Karsten Manufacturing Corporation | Golf club heads with energy storage features |
US20180161644A1 (en) * | 2016-12-08 | 2018-06-14 | Bridgestone Sports Co., Ltd. | Golf club head |
US20190247724A1 (en) * | 2018-02-09 | 2019-08-15 | Sumitomo Rubber Industries, Ltd. | Golf club head |
Also Published As
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JP2021097821A (en) | 2021-07-01 |
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