US20170274254A1 - Golf club - Google Patents
Golf club Download PDFInfo
- Publication number
- US20170274254A1 US20170274254A1 US15/459,018 US201715459018A US2017274254A1 US 20170274254 A1 US20170274254 A1 US 20170274254A1 US 201715459018 A US201715459018 A US 201715459018A US 2017274254 A1 US2017274254 A1 US 2017274254A1
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- United States
- Prior art keywords
- face member
- head body
- golf club
- face
- edge surface
- 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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- 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
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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
- A63B53/0487—Heads for putters
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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
- A63B53/007—Putters
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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
- A63B53/0408—Heads characterised by specific dimensions, e.g. thickness
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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
- A63B53/0416—Heads having an impact surface provided by a face insert
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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
- A63B53/0416—Heads having an impact surface provided by a face insert
- A63B53/042—Heads having an impact surface provided by a face insert the face insert consisting of a material different from that of the head
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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
- A63B60/002—Resonance frequency related characteristics
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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
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/36—Training appliances or apparatus for special sports for golf
- A63B69/3617—Striking surfaces with impact indicating means, e.g. markers
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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
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/36—Training appliances or apparatus for special sports for golf
- A63B69/3623—Training appliances or apparatus for special sports for golf for driving
- A63B69/3632—Clubs or attachments on clubs, e.g. for measuring, aligning
- A63B69/3635—Clubs or attachments on clubs, e.g. for measuring, aligning with sound-emitting source
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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
- A63B69/00—Training appliances or apparatus for special sports
- A63B69/36—Training appliances or apparatus for special sports for golf
- A63B69/3676—Training appliances or apparatus for special sports for golf for putting
- A63B69/3685—Putters or attachments on putters, e.g. for measuring, aligning
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- A63B2053/0408—
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- A63B2053/0416—
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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
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/06—Indicating or scoring devices for games or players, or for other sports activities
- A63B71/0619—Displays, user interfaces and indicating devices, specially adapted for sport equipment, e.g. display mounted on treadmills
- A63B71/0622—Visual, audio or audio-visual systems for entertaining, instructing or motivating the user
- A63B2071/0625—Emitting sound, noise or music
- A63B2071/0633—Emitting sound, noise or music without electronic means
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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
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/32—Golf
Definitions
- the present invention relates to a golf club.
- Japanese Unexamined Patent Application, Publication No. H9-70460 discloses a golf putter which enables the hitting sound to be relatively amplified by adopting an inverted box-like head opened at the rear surface.
- Patent Document 1 Japanese Unexamined Patent Application, Publication No. H9-70460
- a golf club includes a shaft and a club head provided at an end of the shaft, in which the club head includes a head body and a plate-like face member provided along a hitting face of the head body, and in which the face member is fixed to the head body only at a part of an upper edge surface, a part of a lower edge surface, or parts of both the upper and lower edge surfaces of the face member.
- FIG. 1 is a schematic partial front view showing a golf club according to an embodiment of the present invention
- FIG. 2 is a cross sectional view taken along the line A-A of the golf club shown in FIG. 1 ;
- FIG. 3 is a schematic partial front view showing a golf club according to an embodiment of the present invention different from that shown in FIG. 1 ;
- FIG. 4 is a cross sectional view taken along the line B-B of the golf club shown in FIG. 3 .
- the golf club of an embodiment of the present invention involves the features of: the club head including a head body and a plate-like face member provided as a hitting face of the head body; the face member being fixed to the head body only at a part of an upper edge surface, a part of a lower edge surface, or parts of both the upper and lower edge surfaces of the face member; and the upper edge surface and the lower edge surface being at least partially open. Therefore, since the face member has a relatively large area that can vibrate freely, the face member can vibrate relatively greatly. Accordingly, the golf club can generate a relatively large hitting sound, whereby a user can judge relatively easily whether a ball hit a sweet spot, based on the hitting sound.
- a fixing position of the face member may be located in the proximity of a node of a characteristic vibration in a case of freely supporting the face member. Since the fixing position of the face member is thus located in the proximity of the node of the characteristic vibration in the case of freely supporting the face member, a fixed part of the face member is less likely to attenuate the vibration of the face member. Therefore, the present golf club can generate a hitting sound having a relatively long reverberation time period, whereby a user can judge more easily whether a ball hit a sweet spot, based on the hitting sound.
- the Rockwell C-scale hardness of the face member is no less than 40.
- the vibration of the face member is less likely to be attenuated relatively, leading to generation of a larger hitting sound and to a longer reverberation time period, whereby a user can judge more easily whether a ball hit a sweet spot, based on the hitting sound.
- the face member may be fixed to the head body by a set screw.
- the fixed part of the face member can be made small, and the attenuation of the hitting sound caused due to the vibration transmitted to the head body can be relatively reliably inhibited.
- the face member is fixed to the head body at two locations of the upper edge surface, and two locations of the lower edge surface of the face member. In the case of the face member being fixed to the head body at two locations of the upper edge surface, and two locations of the lower edge surface of the face member, the face member can be fixed securely.
- the term “freely supporting” as referred to herein means an ideal supporting state in which point of support is not fixed and vibrations are not inhibited.
- the “proximity” of a node of a characteristic vibration means that the distance from the node of the characteristic vibration in the heel-to-toe direction is no greater than one eight, and preferably no greater than one tenth the wavelength of the characteristic vibration.
- the “Rockwell C-scale hardness” as referred to means a value measured according to JIS-Z2245(2011).
- a golf club according to a first embodiment of the present invention illustrated in FIGS. 1 and 2 is a putter.
- the golf club includes a shaft 1 and a club head 2 provided at an end of the shaft 1 .
- a grip (not shown in the figure) held by a player (user) is attached to the end opposite to the club head 2 of the shaft 1 .
- any shaft for a golf club can be used for the shaft 1 .
- the material, diameter and length of the shaft 1 are not particularly limited.
- the club head 2 includes a head body 3 and a plate-like face member 4 provided along a hitting face of the head body 3 .
- the face member 4 is fixed to the head body 3 at parts of the upper edge surface and parts of the lower edge surface, more specifically, only two locations of the upper edge surface and two locations of the lower edge surface.
- the shape and size of the club head 2 are not particularly limited so long as it can be used as a golf club. More specifically, although a golf club is preferred which is manufactured according to the regulations set by an association such as Professional Golf Association (PGA), for example, it may not be manufactured necessarily according to such regulations, and thus, any golf club is acceptable so long as a user can hit a ball physically with it.
- PGA Professional Golf Association
- the head body 3 includes a cavity 5 in which the face member 4 is provided on the front side (on the side of the ball in a hitting direction, i.e., on the side of a ball flying when hit).
- the cavity 5 is preferably formed in a rectangular shape which is longer in the heel-to-toe direction (a horizontal direction parallel to the hitting face) as viewed from the front which is perpendicular to the hitting face (observed from the front side in a forward/backward direction).
- the head body 3 is formed in a box-like shape opened at the front side.
- the head body 3 may be formed in a cylindrical shape or in a frame-like shape opened not only at the front side but also at the rear side.
- the head body 3 includes a pair of screw holes 6 formed so as to extend through a top wall portion of the cavity 5 in a vertical direction, and a pair of fixing pins 7 provided to project in an upper direction so as to face the screw holes 6 at a bottom wall portion of the cavity 5 .
- Set screws 8 (locking screws) are screwed into the screw holes 6 , respectively.
- the thickness of the head body 3 at regions of the top wall portion and the bottom wall portion of the cavity 5 into which the face member 4 is fit is set so as to have strength that can endure the impact to the head body 3 caused upon hitting of a ball with the golf club. More specifically, the lower limit of the average thickness of the head body 3 at the regions of the top wall portion and the bottom wall portion of the cavity 5 into which the face member 4 is fit is preferably 2 mm, and more preferably 3 mm. On the other hand, the upper limit of the average thickness of the head body 3 at the regions of the top wall portion and the bottom wall portion of the cavity 5 into which the face member 4 is fit is preferably 8 mm, and more preferably 6 mm.
- the strength may be insufficient.
- the average thickness of the head body 3 at the regions of the top wall portion and the bottom wall portion of the cavity 5 into which the face member 4 is fit is greater than the upper limit, the hitting face may be unnecessarily small.
- the thicknesses of the head body 3 at the top wall portion and at the bottom wall portion of the cavity 5 may differ from each other. According to the golf club of the present invention, in particular, when the thickness of the head body 3 at the bottom wall portion of the cavity 5 is greater than the upper limit, hitting a ball placed on the ground with the face member 4 at the center thereof in the vertical direction may be difficult.
- the lower limit of the maximum length in the forward/backward direction of the head body 3 is preferably 2 cm, and more preferably 3 cm.
- the upper limit of the maximum length in the forward/backward direction of the head body 3 is preferably 15 cm, and more preferably 10 cm.
- the maximum length in the forward/backward direction of the head body 3 is less than the lower limit, the strength of the head body 3 may be insufficient, or the fixation of the head body 3 to the shaft 1 may be difficult.
- the maximum length in the forward/backward direction of the head body 3 is greater than the upper limit, handling of the golf club may be difficult.
- a material of the head body 3 is not particularly limited, a metal such as stainless steel having a superior strength and processability is preferably used.
- the lower limit of the effective diameter of the fixing pin 7 is preferably 1 mm, and more preferably 1.4 mm.
- the upper limit of the effective diameter of the fixing pin 7 is preferably 3 mm, and more preferably 2.5 mm.
- the effective diameter of the fixing pin 7 is less than the lower limit, the strength may be insufficient so that the fixing pin 7 may be deformed or fractured when a user hits a ball.
- the effective diameter of the fixing pin 7 is greater than the upper limit, the fixing pin 7 may inhibit the vibration of the face member 4 .
- the “effective diameter” as referred to means a diameter of a part in contact with the face member 4 .
- the lower limit of the outer diameter (nominal diameter) of the set screw 8 is preferably 1.2 mm, and more preferably 1.8 mm.
- the upper limit of the outer diameter of the set screw 8 is preferably 4 mm, and more preferably 3 mm.
- the face member 4 is preferably formed in a rectangular shape which is longer in the heel-to-toe direction as viewed from the front. Furthermore, it is preferred that the face member 4 has a symmetrical shape in the heel-to-toe direction and the vertical direction, respectively. By forming the face member 4 symmetrically in the vertical and horizontal directions, the vibration of the face member 4 results in a standing wave and the vibration of a specific wavelength becomes large so that a relatively large sound can be generated.
- This face member 4 is retained substantially vertically with respect to the hitting direction by the fixing pin 7 and the set screws 8 so as to substantially seal an opening portion of the cavity 5 and form gaps between each of peripheral walls (a top wall, a bottom wall, and a side wall) of the cavity 5 and a rear wall of the cavity 5 , respectively. It is preferred that the face member 4 is provided such that a surface on the front side thereof is situated on the same plane as a front end face of the peripheral wall of the head body 3 , or situated forward from the front end face thereof.
- the lower limit of the average width in the vertical direction of the face member 4 is preferably 8 mm, and more preferably 10 mm.
- the upper limit of the average width in the vertical direction of the face member 4 is preferably 40 mm, and more preferably 20 mm.
- the lower limit of the average width in the heel-to-toe direction of the face member 4 is preferably 4 cm, and more preferably 5 cm.
- the upper limit of the average width in the heel-to-toe direction of the face member 4 is preferably 8 cm, and more preferably 7 cm.
- the sweet spot on the face member 4 may be small.
- the average width in the heel-to-toe direction of the face member 4 is greater than the upper limit, the width in the heel-to-toe direction of the club head may be too large.
- the lower limit of the average space between the face member 4 and the peripheral wall of the cavity 5 is preferably 0.5 mm, and more preferably 1 mm.
- the upper limit of the average space between the face member 4 and the peripheral wall of the cavity 5 is preferably 5 mm, and more preferably 3 mm.
- the lower limit of the average space in the forward/backward direction between the face member 4 and the rear wall of the cavity 5 is preferably 3 mm, and more preferably 5 mm.
- the upper limit of the average space between the face member 4 and the rear wall of the cavity 5 is preferably 5 cm, and more preferably 3 cm.
- the face member 4 may include a pair of upper counterbores 9 which is formed at the upper edge surface of the face member 4 and with which the set screws 8 are engaged, and a pair of lower counterbores 10 which is formed at the lower edge surface of the face member 4 and with which the fixing pins 7 are engaged.
- one of the upper counterbore 9 and the lower counterbore 10 has a recess portion in a rotary-surface shape at which a cross-sectional area in a conical shape, in a spherical shape, etc., decreases monotonously, and the other one of the upper counterbore 9 and the lower counterbore 10 has a groove shape in which a width in a V-groove shape, etc., decreases monotonously.
- the lower limit of the average width of the upper counterbore 9 and the lower counterbore 10 is preferably 1 mm, and more preferably 1.5 mm.
- the upper limit of the average width of the upper counterbore 9 and the lower counterbore 10 is preferably 5 mm, and more preferably 3 mm.
- the engagement with the set screw 8 or the fixing pin 7 may be insufficient.
- the average width of the upper counterbore 9 and the lower counterbore 10 is greater than the upper limit, the face member 4 may not be positioned precisely, or the vibration of the face member 4 may be disturbed.
- the lower limit of the maximum depth of the upper counterbore 9 and the lower counterbore 10 is preferably 0.3 mm, and more preferably 0.5 mm.
- the upper limit of the maximum depth of the upper counterbore 9 and the lower counterbore 10 is preferably 1.5 mm, and more preferably 1 mm.
- positions of the upper counterbore 9 and the lower counterbore 10 in the heel-to-toe direction i.e., fixing positions of the face member 4 are located in the proximity of a node of a characteristic vibration in the case of freely supporting the face member 4 .
- the structure of fixing the face member 4 does not inhibit the vibration of the face member 4 .
- vibration energy to the head body 3 through the set screw 8 and the fixing pin 7 does not diffuse. Therefore, the attenuation of the vibration of the face member 4 can be inhibited. Accordingly, since the face member 4 of the embodiment of the present invention results in a longer reverberation which is generated when a player hits a ball with the golf club, the player can discriminate the hitting sound easily.
- the center of the face member 4 corresponds to an antinode of the vibration.
- the location corresponding to the antinode of the vibration of the face member 4 is a sweet spot in which the repulsive force due to the elasticity of the face member 4 can be easily attained, thereby enabling kinetic energy of the club head 2 to be transmitted to the ball precisely.
- the location corresponding to the antinode of the vibration is also a location at which the face member 4 can be most efficiently vibrated.
- the face member 4 vibrates with a larger amplitude so that a larger sound having a longer reverberation is generated. Furthermore, as the ball hitting location deviates from the sweet spot, a vibration having a frequency component different from a resonance frequency of the characteristic vibration is likely to be generated first. Therefore, according to the golf club, whether the ball hit the sweet spot can be determined relatively easily based on a tone of the hitting sound, sound pressure, and the length of a reverberation.
- a characteristic vibration in which the fixing position of the face member 4 is located at a node is an odd-order vibration mode.
- the center portion of the face member 4 in the heel-to-toe direction corresponds to an antinode of the vibration, i.e. the sweet spot, in the odd-order vibration mode, and therefore the golf club having such a configuration can be used conveniently.
- the characteristic vibration in which the fixing position of the face member 4 is located at the node is the primary vibration mode.
- the primary vibration mode has the largest interval of nodes and allows the largest amplitude to be attained with respect to hitting energy. Therefore, by fixing the face member 4 to the head body 3 at the node in the primary vibration mode, the sweet spot can be made larger, thereby enabling a larger hitting sound to be generated. More specifically, in a case in which the face member 4 is homogeneous and in a rectangular plate shape having a constant thickness, the node of the characteristic vibration is approximately 0.224 times the length of the face member 4 , from each of the both ends thereof.
- the lower limit of the average thickness between the fixing positions of the face member 4 (the region along the line between the opposed upper counterbore 9 and counterbore 10 ) is preferably 1 mm, and more preferably 1.5 mm.
- the upper limit of the average thickness between the fixing positions of the face member 4 is preferably 10 mm, and more preferably 8 mm.
- the thickness of the face member 4 may be totally constant or may vary in part.
- the thickness in the proximity of the both ends of the face member 4 in the heel-to-toe direction is made greater than the thickness at the center portion in the heel-to-toe direction
- the mass of the both ends thereof in the heel-to-toe direction is greater and a node of the characteristic vibration of the face member 4 becomes closer to the both ends thereof in the heel-to-toe direction than the case of the thickness of the face member 4 being constant. Accordingly, the range in which the amplitude of the characteristic vibration is great can be expanded, whereby the sweet spot of the golf club can be made larger.
- the node of the characteristic vibration of the face member 4 can be moved by attaching a weight in the proximity of the both ends of the face member 4 in the heel-to-toe direction.
- the thickness (weight) of the face member 4 does not vary in the vertical direction. If the thickness of the face member 4 varies in the vertical direction, a component of the characteristic vibration in the vertical direction may be generated so that a progressive wave is formed and thus the sound may be distorted or the sound pressure may be reduced.
- a material of the face member 4 is preferably steel having a relatively greater hardness, and more preferably steel subjected to a quenching treatment. By forming the face member 4 with a material having such a greater hardness, the characteristic vibration frequency of the face member 4 can be made relatively higher, and thus hearing of the hitting sound can be facilitated. It should also be noted that the surface of the face member 4 may be subjected to an anti-corrosive treatment such as solid chrome plating.
- the lower limit of the a Rockwell C-scale hardness (HRC) of the face member 4 is preferably 40, more preferably 50, and further preferably 55.
- the upper limit of the Rockwell C-scale hardness of the face member 4 is preferably 80, and more preferably 75.
- the characteristic vibration frequency of the face member 4 i.e. the frequency of the hitting sound
- the Rockwell C-scale hardness of the face member 4 is greater than the upper limit, processing of the face member 4 may be difficult, and thus the golf club may be unnecessarily expensive.
- the face member 4 since the face member 4 is fixed to the head body 3 only at the parts (four locations) of the upper and lower edge surfaces thereof, the face member 4 easily vibrates and thus a relatively large hitting sound with a long reverberation is generated. Furthermore, upon hitting of a ball at an antinode of the characteristic vibration corresponding to the sweet spot of the face member 4 , the hitting sound has a smaller distortion and larger sound pressure. Therefore, according to the golf club of the embodiment of present invention, whether the ball hit the sweet spot can be judged relatively easily based on the hitting sound.
- a golf club according to another embodiment of the present invention illustrated in FIGS. 3 and 4 includes a shaft 1 and a club head 2 a provided at an end of the shaft 1 .
- the shaft 1 of the golf club shown in FIG. 3 may be similar to the shaft 1 of the golf club shown in FIG. 1 .
- the club head 2 a includes a head body 3 a and a plate-like face member 4 a provided along a hitting face of the head body 3 a.
- the face member 4 a is fixed to the head body 3 a only at two locations on an upper edge surface of the face member 4 a. In other words, a lower edge surface of the face member 4 a is not fixed to the head body 3 a.
- the configuration of the head body 3 a and the face member 4 a of the golf club shown in FIG. 3 may be similar to the configuration of the head body 3 and the face member 4 of the golf club shown in FIG. 1 , except for the configuration relating to the fixation of the face member 4 a to the head body 3 a.
- Two fixation projections 11 are provided at the face member 4 a so as to project upward, respectively, from the locations of two nodes of the characteristic vibration on the upper edge surface of the face member 4 a.
- the fixation projections 11 may be carved out integrally with the face member 4 a from a plate-like material, for example. Alternatively, the fixation projections 11 may be fixed to the face member 4 a by welding, etc.
- the face member 4 a is fixed so as to substantially seal an opening of a cavity 5 by attaching the fixation projections 11 at a front end face of a top wall of the cavity 5 of the head body 3 a.
- the fixation projections 11 are preferably fit into fitting recess portions formed on the front end face of the top wall of the head body 3 a.
- fixation projections 11 For a fixing procedure of the fixation projections 11 to the head body 3 , although welding, etc., may be used, for example, a procedure in which screws 12 are used may be preferably employed, as illustrated in FIG. 4 .
- the fixation projections 11 may be provided with fixation holes 13 into which the screws 12 are inserted. As illustrated in the figure, the fixation holes 13 preferably include counterbores into which the heads of the screws 12 are fit.
- the widths of portions extending from the upper edge surface in the heel-to-toe direction of the fixation projections 11 may be made shorter, as illustrated in the figure, so that the vibration of the face member 4 is less likely to be restricted.
- the present invention may be applied also to golf clubs other than putters, such as woods (for example, drivers) and irons (for example, approach wedges).
- the shape of the face member as viewed from the front according to the golf club of the other embodiment of the present invention is not limited to the rectangular shape and may be in any shape, such as an oblong shape, a semi-elliptical shape, and a triangle shape.
- the face member is preferably in a shape in which a lower edge of the face member extends linearly in the heel-to-toe direction or is in a slightly downwardly convex shape so that a user can hit the ball at the center of the face member, without the club head being brought into contact with the ground.
- a fixation method for the face member in the golf club of the other embodiment of the present invention is not limited to the methods according to the above-described embodiments, and any method can be adopted.
- the face member may be fixed to the head body by using a pin which penetrates from the head body to the upper edge surface of the face member.
- the lower side of the face member may be fixed by the set screw, or both the upper and lower sides may be fixed by the set screw.
- the fixation projections may be provided at the upper portion and the lower portion so as to fix the both upper and lower edges.
- the fixation projection at the lower side may be simply fit into a fitting recess portion of the head body without being screwed. According to such a configuration, a bottom wall of the head body can be easily made thinner.
- the face member in the golf club of the embodiment of the present invention may be fixed to the head body only at a single location of the upper edge surface, a single location of the lower edge surface, or each single location at the upper and lower edge surfaces.
- a fixed location at the upper edge surface in the horizontal direction may differ from a fixed location at the lower edge surface in the horizontal direction.
- an upper end of one of two resonance points of the face member and a lower end of the other one of the two resonance points of the face member may be fixed, whereas a lower end of the one resonance point and an upper end of the other resonance point may not be fixed.
- the head body may include a through-hole through which a sound can be passed, at the peripheral wall or the rear wall of the cavity.
- the golf club according to the present invention can be preferably used as a putter, in particular.
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- Biophysics (AREA)
- Golf Clubs (AREA)
Abstract
A golf club includes a shaft, and a club head provided at an end of the shaft, wherein: the club head includes a head body and plate-like face member provided as a hitting face of the head body; and the face member is fixed to the head body only at a part of an upper or lower edge surface, or parts of both upper and lower edge surfaces of the face member. A fixing position of the face member may be located in the proximity of a node of a characteristic vibration in a case of freely supporting the face member. The Rockwell C-scale hardness of the face member is preferably no less than 40. The face member may be fixed to the head body by a set screw, at two locations of the upper edge surface, and two locations of the lower edge surface of the face member.
Description
- The present invention relates to a golf club.
- When playing golf, it is important to hit a ball in the center of the hitting face of a club head (so-called “sweet spot”). As a basis for a player judging whether the player hit the ball in the sweet spot, hitting sounds are considered. Therefore, commercially available woods, in particular, drivers, etc., are designed while taking into account such hitting sounds.
- Among clubs, putters are accompanied by smaller hitting sounds since a ball is hit with a relatively little power. Therefore, it is difficult to judge whether the ball was hit in the sweet spot, based on the hitting sound. In order to address such a situation, Japanese Unexamined Patent Application, Publication No. H9-70460 discloses a golf putter which enables the hitting sound to be relatively amplified by adopting an inverted box-like head opened at the rear surface. However, it is also difficult to amplify the hitting sound of the golf putter sufficiently even with the structure disclosed in Japanese Unexamined Patent Application, Publication No. H9-70460, and thus it is still difficult to judge whether the ball hit the sweet spot, based on the hitting sound.
- Patent Document 1: Japanese Unexamined Patent Application, Publication No. H9-70460
- In order to address the foregoing circumstances, it is an object of the present invention to provide a golf club which allows a user to judge relatively easily whether a ball hit a sweet spot, based on a hitting sound.
- According to an aspect of the present invention that has been made to solve the problems, a golf club includes a shaft and a club head provided at an end of the shaft, in which the club head includes a head body and a plate-like face member provided along a hitting face of the head body, and in which the face member is fixed to the head body only at a part of an upper edge surface, a part of a lower edge surface, or parts of both the upper and lower edge surfaces of the face member.
- According to the golf club of the aspect of present invention as described above, whether a ball hit a sweet spot can be judged relatively easily based on a hitting sound.
-
FIG. 1 is a schematic partial front view showing a golf club according to an embodiment of the present invention; -
FIG. 2 is a cross sectional view taken along the line A-A of the golf club shown inFIG. 1 ; -
FIG. 3 is a schematic partial front view showing a golf club according to an embodiment of the present invention different from that shown inFIG. 1 ; and -
FIG. 4 is a cross sectional view taken along the line B-B of the golf club shown inFIG. 3 . - Hereinafter, embodiments of the present invention will be described with reference to the drawings as necessary.
- The golf club of an embodiment of the present invention involves the features of: the club head including a head body and a plate-like face member provided as a hitting face of the head body; the face member being fixed to the head body only at a part of an upper edge surface, a part of a lower edge surface, or parts of both the upper and lower edge surfaces of the face member; and the upper edge surface and the lower edge surface being at least partially open. Therefore, since the face member has a relatively large area that can vibrate freely, the face member can vibrate relatively greatly. Accordingly, the golf club can generate a relatively large hitting sound, whereby a user can judge relatively easily whether a ball hit a sweet spot, based on the hitting sound.
- It is preferred that a fixing position of the face member may be located in the proximity of a node of a characteristic vibration in a case of freely supporting the face member. Since the fixing position of the face member is thus located in the proximity of the node of the characteristic vibration in the case of freely supporting the face member, a fixed part of the face member is less likely to attenuate the vibration of the face member. Therefore, the present golf club can generate a hitting sound having a relatively long reverberation time period, whereby a user can judge more easily whether a ball hit a sweet spot, based on the hitting sound.
- It is preferred that the Rockwell C-scale hardness of the face member is no less than 40. In the case of the Rockwell C-scale hardness of the face member being no less than the lower limit, the vibration of the face member is less likely to be attenuated relatively, leading to generation of a larger hitting sound and to a longer reverberation time period, whereby a user can judge more easily whether a ball hit a sweet spot, based on the hitting sound.
- It is preferred that the face member may be fixed to the head body by a set screw. In the case of the face member being fixed to the head body by the set screw, the fixed part of the face member can be made small, and the attenuation of the hitting sound caused due to the vibration transmitted to the head body can be relatively reliably inhibited.
- It is preferred that the face member is fixed to the head body at two locations of the upper edge surface, and two locations of the lower edge surface of the face member. In the case of the face member being fixed to the head body at two locations of the upper edge surface, and two locations of the lower edge surface of the face member, the face member can be fixed securely.
- The term “freely supporting” as referred to herein means an ideal supporting state in which point of support is not fixed and vibrations are not inhibited. The “proximity” of a node of a characteristic vibration means that the distance from the node of the characteristic vibration in the heel-to-toe direction is no greater than one eight, and preferably no greater than one tenth the wavelength of the characteristic vibration. The “Rockwell C-scale hardness” as referred to means a value measured according to JIS-Z2245(2011).
- A golf club according to a first embodiment of the present invention illustrated in
FIGS. 1 and 2 is a putter. The golf club includes ashaft 1 and aclub head 2 provided at an end of theshaft 1. - Publicly known shafts can be used for the
shaft 1. A grip (not shown in the figure) held by a player (user) is attached to the end opposite to theclub head 2 of theshaft 1. - Any shaft for a golf club can be used for the
shaft 1. In other words, the material, diameter and length of theshaft 1 are not particularly limited. - The
club head 2 includes ahead body 3 and a plate-like face member 4 provided along a hitting face of thehead body 3. Theface member 4 is fixed to thehead body 3 at parts of the upper edge surface and parts of the lower edge surface, more specifically, only two locations of the upper edge surface and two locations of the lower edge surface. - The shape and size of the
club head 2 are not particularly limited so long as it can be used as a golf club. More specifically, although a golf club is preferred which is manufactured according to the regulations set by an association such as Professional Golf Association (PGA), for example, it may not be manufactured necessarily according to such regulations, and thus, any golf club is acceptable so long as a user can hit a ball physically with it. - The
head body 3 includes acavity 5 in which theface member 4 is provided on the front side (on the side of the ball in a hitting direction, i.e., on the side of a ball flying when hit). Thecavity 5 is preferably formed in a rectangular shape which is longer in the heel-to-toe direction (a horizontal direction parallel to the hitting face) as viewed from the front which is perpendicular to the hitting face (observed from the front side in a forward/backward direction). In other words, it is preferred that thehead body 3 is formed in a box-like shape opened at the front side. Furthermore, thehead body 3 may be formed in a cylindrical shape or in a frame-like shape opened not only at the front side but also at the rear side. - The
head body 3 includes a pair ofscrew holes 6 formed so as to extend through a top wall portion of thecavity 5 in a vertical direction, and a pair offixing pins 7 provided to project in an upper direction so as to face thescrew holes 6 at a bottom wall portion of thecavity 5. Set screws 8 (locking screws) are screwed into thescrew holes 6, respectively. - The thickness of the
head body 3 at regions of the top wall portion and the bottom wall portion of thecavity 5 into which theface member 4 is fit is set so as to have strength that can endure the impact to thehead body 3 caused upon hitting of a ball with the golf club. More specifically, the lower limit of the average thickness of thehead body 3 at the regions of the top wall portion and the bottom wall portion of thecavity 5 into which theface member 4 is fit is preferably 2 mm, and more preferably 3 mm. On the other hand, the upper limit of the average thickness of thehead body 3 at the regions of the top wall portion and the bottom wall portion of thecavity 5 into which theface member 4 is fit is preferably 8 mm, and more preferably 6 mm. When the average thickness of thehead body 3 at the regions of the top wall portion and the bottom wall portion of thecavity 5 into which theface member 4 is fit is less than the lower limit, the strength may be insufficient. To the contrary, when the average thickness of thehead body 3 at the regions of the top wall portion and the bottom wall portion of thecavity 5 into which theface member 4 is fit is greater than the upper limit, the hitting face may be unnecessarily small. It should be noted that the thicknesses of thehead body 3 at the top wall portion and at the bottom wall portion of thecavity 5 may differ from each other. According to the golf club of the present invention, in particular, when the thickness of thehead body 3 at the bottom wall portion of thecavity 5 is greater than the upper limit, hitting a ball placed on the ground with theface member 4 at the center thereof in the vertical direction may be difficult. - The lower limit of the maximum length in the forward/backward direction of the
head body 3 is preferably 2 cm, and more preferably 3 cm. On the other hand, the upper limit of the maximum length in the forward/backward direction of thehead body 3 is preferably 15 cm, and more preferably 10 cm. When the maximum length in the forward/backward direction of thehead body 3 is less than the lower limit, the strength of thehead body 3 may be insufficient, or the fixation of thehead body 3 to theshaft 1 may be difficult. To the contrary, when the maximum length in the forward/backward direction of thehead body 3 is greater than the upper limit, handling of the golf club may be difficult. - Although a material of the
head body 3 is not particularly limited, a metal such as stainless steel having a superior strength and processability is preferably used. - Furthermore, the lower limit of the effective diameter of the fixing
pin 7 is preferably 1 mm, and more preferably 1.4 mm. On the other hand, the upper limit of the effective diameter of the fixingpin 7 is preferably 3 mm, and more preferably 2.5 mm. When the effective diameter of the fixingpin 7 is less than the lower limit, the strength may be insufficient so that the fixingpin 7 may be deformed or fractured when a user hits a ball. To the contrary, when the effective diameter of the fixingpin 7 is greater than the upper limit, the fixingpin 7 may inhibit the vibration of theface member 4. It should be noted that the “effective diameter” as referred to means a diameter of a part in contact with theface member 4. - Furthermore, the lower limit of the outer diameter (nominal diameter) of the
set screw 8 is preferably 1.2 mm, and more preferably 1.8 mm. On the other hand, the upper limit of the outer diameter of theset screw 8 is preferably 4 mm, and more preferably 3 mm. When the outer diameter of theset screw 8 is less than the lower limit, the strength may be insufficient so that theset screw 8 may be deformed or fractured when a user hits a ball. To the contrary, when the outer diameter of theset screw 8 is greater than the upper limit, theset screw 8 may inhibit the vibration of theface member 4. - The
face member 4 is preferably formed in a rectangular shape which is longer in the heel-to-toe direction as viewed from the front. Furthermore, it is preferred that theface member 4 has a symmetrical shape in the heel-to-toe direction and the vertical direction, respectively. By forming theface member 4 symmetrically in the vertical and horizontal directions, the vibration of theface member 4 results in a standing wave and the vibration of a specific wavelength becomes large so that a relatively large sound can be generated. - This
face member 4 is retained substantially vertically with respect to the hitting direction by the fixingpin 7 and theset screws 8 so as to substantially seal an opening portion of thecavity 5 and form gaps between each of peripheral walls (a top wall, a bottom wall, and a side wall) of thecavity 5 and a rear wall of thecavity 5, respectively. It is preferred that theface member 4 is provided such that a surface on the front side thereof is situated on the same plane as a front end face of the peripheral wall of thehead body 3, or situated forward from the front end face thereof. - The lower limit of the average width in the vertical direction of the
face member 4 is preferably 8 mm, and more preferably 10 mm. On the other hand, the upper limit of the average width in the vertical direction of theface member 4 is preferably 40 mm, and more preferably 20 mm. When the average width in the vertical direction of theface member 4 is less than the lower limit, hitting a ball on theface member 4 may not be easy. To the contrary, when the average width in the vertical direction of theface member 4 is greater than the upper limit, hitting the ball at the center in the vertical direction of theface member 4 may be difficult. - The lower limit of the average width in the heel-to-toe direction of the
face member 4 is preferably 4 cm, and more preferably 5 cm. On the other hand, the upper limit of the average width in the heel-to-toe direction of theface member 4 is preferably 8 cm, and more preferably 7 cm. When the average width in the heel-to-toe direction of theface member 4 is less than the lower limit, the sweet spot on theface member 4 may be small. To the contrary, when the average width in the heel-to-toe direction of theface member 4 is greater than the upper limit, the width in the heel-to-toe direction of the club head may be too large. - The lower limit of the average space between the
face member 4 and the peripheral wall of thecavity 5 is preferably 0.5 mm, and more preferably 1 mm. On the other hand, the upper limit of the average space between theface member 4 and the peripheral wall of thecavity 5 is preferably 5 mm, and more preferably 3 mm. When the average space between theface member 4 and the peripheral wall of thecavity 5 is less than the lower limit, air vibrations at the backside of theface member 4 are less likely to be transmitted to the outside, and thus, a hitting sound may be small or a reverberation may be shortened. To the contrary, when the average space between theface member 4 and the peripheral wall of thecavity 5 is greater than the upper limit, the hitting face may be unnecessarily small. - The lower limit of the average space in the forward/backward direction between the
face member 4 and the rear wall of thecavity 5 is preferably 3 mm, and more preferably 5 mm. On the other hand, the upper limit of the average space between theface member 4 and the rear wall of thecavity 5 is preferably 5 cm, and more preferably 3 cm. When the average space between theface member 4 and the rear wall of thecavity 5 is less than the lower limit, an air space between theface member 4 and the rear wall of thecavity 5 may inhibit the vibration of theface member 4. To the contrary, when the average space between theface member 4 and the rear wall of thecavity 5 is greater than the upper limit, theclub head 2 may be too large. - In order to securely fix the
face member 4 to thehead body 3, theface member 4 may include a pair ofupper counterbores 9 which is formed at the upper edge surface of theface member 4 and with which theset screws 8 are engaged, and a pair oflower counterbores 10 which is formed at the lower edge surface of theface member 4 and with which the fixing pins 7 are engaged. - In addition, it is preferred that one of the
upper counterbore 9 and thelower counterbore 10 has a recess portion in a rotary-surface shape at which a cross-sectional area in a conical shape, in a spherical shape, etc., decreases monotonously, and the other one of theupper counterbore 9 and thelower counterbore 10 has a groove shape in which a width in a V-groove shape, etc., decreases monotonously. When one of theupper counterbore 9 and thelower counterbore 10 is thus formed in a groove shape, a dimensional error in the heel-to-toe direction along thehead body 3 and the hitting face of theface member 4 can be absorbed. - The lower limit of the average width of the
upper counterbore 9 and thelower counterbore 10 is preferably 1 mm, and more preferably 1.5 mm. On the other hand, the upper limit of the average width of theupper counterbore 9 and thelower counterbore 10 is preferably 5 mm, and more preferably 3 mm. When the average width of theupper counterbore 9 and thelower counterbore 10 is less than the lower limit, the engagement with theset screw 8 or the fixingpin 7 may be insufficient. To the contrary, when the average width of theupper counterbore 9 and thelower counterbore 10 is greater than the upper limit, theface member 4 may not be positioned precisely, or the vibration of theface member 4 may be disturbed. - The lower limit of the maximum depth of the
upper counterbore 9 and thelower counterbore 10 is preferably 0.3 mm, and more preferably 0.5 mm. On the other hand, the upper limit of the maximum depth of theupper counterbore 9 and thelower counterbore 10 is preferably 1.5 mm, and more preferably 1 mm. When the maximum depth of theupper counterbore 9 and thelower counterbore 10 is less than the lower limit, the engagement with theset screw 8 or the fixingpin 7 may be insufficient. To the contrary, when the maximum depth of theupper counterbore 9 and thelower counterbore 10 is greater than the upper limit, the vibration of theface member 4 may be disturbed. - It is preferred that positions of the
upper counterbore 9 and thelower counterbore 10 in the heel-to-toe direction, i.e., fixing positions of theface member 4 are located in the proximity of a node of a characteristic vibration in the case of freely supporting theface member 4. By supporting in the proximity of the node of the characteristic vibration in the case of freely supporting theface member 4, the structure of fixing theface member 4 does not inhibit the vibration of theface member 4. In other words, by providing theset screw 8 and the fixingpin 7 at the node of the characteristic vibration, vibration energy to thehead body 3 through theset screw 8 and the fixingpin 7 does not diffuse. Therefore, the attenuation of the vibration of theface member 4 can be inhibited. Accordingly, since theface member 4 of the embodiment of the present invention results in a longer reverberation which is generated when a player hits a ball with the golf club, the player can discriminate the hitting sound easily. - Furthermore, by supporting in the proximity of the node of the characteristic vibration in the case of freely supporting the
face member 4, the center of theface member 4, as viewed from the front, corresponds to an antinode of the vibration. The location corresponding to the antinode of the vibration of theface member 4 is a sweet spot in which the repulsive force due to the elasticity of theface member 4 can be easily attained, thereby enabling kinetic energy of theclub head 2 to be transmitted to the ball precisely. Moreover, the location corresponding to the antinode of the vibration is also a location at which theface member 4 can be most efficiently vibrated. - Thus, upon hitting of the ball at the sweet spot when the ball is hit with the golf club, the
face member 4 vibrates with a larger amplitude so that a larger sound having a longer reverberation is generated. Furthermore, as the ball hitting location deviates from the sweet spot, a vibration having a frequency component different from a resonance frequency of the characteristic vibration is likely to be generated first. Therefore, according to the golf club, whether the ball hit the sweet spot can be determined relatively easily based on a tone of the hitting sound, sound pressure, and the length of a reverberation. - It is preferred that a characteristic vibration in which the fixing position of the
face member 4 is located at a node is an odd-order vibration mode. In a case in which theface member 4 is homogeneous and in a rectangular plate shape having a constant thickness, the center portion of theface member 4 in the heel-to-toe direction corresponds to an antinode of the vibration, i.e. the sweet spot, in the odd-order vibration mode, and therefore the golf club having such a configuration can be used conveniently. - It is particularly preferred that the characteristic vibration in which the fixing position of the
face member 4 is located at the node is the primary vibration mode. Among the vibration modes in each order, the primary vibration mode has the largest interval of nodes and allows the largest amplitude to be attained with respect to hitting energy. Therefore, by fixing theface member 4 to thehead body 3 at the node in the primary vibration mode, the sweet spot can be made larger, thereby enabling a larger hitting sound to be generated. More specifically, in a case in which theface member 4 is homogeneous and in a rectangular plate shape having a constant thickness, the node of the characteristic vibration is approximately 0.224 times the length of theface member 4, from each of the both ends thereof. - The lower limit of the average thickness between the fixing positions of the face member 4 (the region along the line between the opposed
upper counterbore 9 and counterbore 10) is preferably 1 mm, and more preferably 1.5 mm. On the other hand, the upper limit of the average thickness between the fixing positions of theface member 4 is preferably 10 mm, and more preferably 8 mm. When the average thickness between the fixing positions of theface member 4 is less than the lower limit, the strength of theface member 4 may be insufficient. To the contrary, when the average thickness between the fixing positions of theface member 4 is greater than the upper limit, a characteristic vibration frequency of the face member 4 (i.e. frequency of a hitting sound) may be smaller, and thus hearing the hitting sound may be difficult. - The thickness of the
face member 4 may be totally constant or may vary in part. For example, in a case in which the thickness in the proximity of the both ends of theface member 4 in the heel-to-toe direction is made greater than the thickness at the center portion in the heel-to-toe direction, the mass of the both ends thereof in the heel-to-toe direction is greater and a node of the characteristic vibration of theface member 4 becomes closer to the both ends thereof in the heel-to-toe direction than the case of the thickness of theface member 4 being constant. Accordingly, the range in which the amplitude of the characteristic vibration is great can be expanded, whereby the sweet spot of the golf club can be made larger. - The node of the characteristic vibration of the
face member 4 can be moved by attaching a weight in the proximity of the both ends of theface member 4 in the heel-to-toe direction. In addition, it is preferred that the thickness (weight) of theface member 4 does not vary in the vertical direction. If the thickness of theface member 4 varies in the vertical direction, a component of the characteristic vibration in the vertical direction may be generated so that a progressive wave is formed and thus the sound may be distorted or the sound pressure may be reduced. - A material of the
face member 4 is preferably steel having a relatively greater hardness, and more preferably steel subjected to a quenching treatment. By forming theface member 4 with a material having such a greater hardness, the characteristic vibration frequency of theface member 4 can be made relatively higher, and thus hearing of the hitting sound can be facilitated. It should also be noted that the surface of theface member 4 may be subjected to an anti-corrosive treatment such as solid chrome plating. - The lower limit of the a Rockwell C-scale hardness (HRC) of the
face member 4 is preferably 40, more preferably 50, and further preferably 55. On the other hand, the upper limit of the Rockwell C-scale hardness of theface member 4 is preferably 80, and more preferably 75. When the Rockwell C-scale hardness of theface member 4 is less than the lower limit, the characteristic vibration frequency of the face member 4 (i.e. the frequency of the hitting sound) may be small and the vibration may be easily attenuated, so that it may be difficult for a user to hear the hitting sound. To the contrary, when the Rockwell C-scale hardness of theface member 4 is greater than the upper limit, processing of theface member 4 may be difficult, and thus the golf club may be unnecessarily expensive. - As described above, according to the golf club of the embodiment of the present invention, since the
face member 4 is fixed to thehead body 3 only at the parts (four locations) of the upper and lower edge surfaces thereof, theface member 4 easily vibrates and thus a relatively large hitting sound with a long reverberation is generated. Furthermore, upon hitting of a ball at an antinode of the characteristic vibration corresponding to the sweet spot of theface member 4, the hitting sound has a smaller distortion and larger sound pressure. Therefore, according to the golf club of the embodiment of present invention, whether the ball hit the sweet spot can be judged relatively easily based on the hitting sound. - A golf club according to another embodiment of the present invention illustrated in
FIGS. 3 and 4 includes ashaft 1 and aclub head 2 a provided at an end of theshaft 1. - The
shaft 1 of the golf club shown inFIG. 3 may be similar to theshaft 1 of the golf club shown inFIG. 1 . - The
club head 2 a includes ahead body 3 a and a plate-like face member 4 a provided along a hitting face of thehead body 3 a. Theface member 4 a is fixed to thehead body 3 a only at two locations on an upper edge surface of theface member 4 a. In other words, a lower edge surface of theface member 4 a is not fixed to thehead body 3 a. - The configuration of the
head body 3 a and theface member 4 a of the golf club shown inFIG. 3 may be similar to the configuration of thehead body 3 and theface member 4 of the golf club shown inFIG. 1 , except for the configuration relating to the fixation of theface member 4 a to thehead body 3 a. - Two
fixation projections 11 are provided at theface member 4 a so as to project upward, respectively, from the locations of two nodes of the characteristic vibration on the upper edge surface of theface member 4 a. Thefixation projections 11 may be carved out integrally with theface member 4 a from a plate-like material, for example. Alternatively, thefixation projections 11 may be fixed to theface member 4 a by welding, etc. - The
face member 4 a is fixed so as to substantially seal an opening of acavity 5 by attaching thefixation projections 11 at a front end face of a top wall of thecavity 5 of thehead body 3 a. Thefixation projections 11 are preferably fit into fitting recess portions formed on the front end face of the top wall of thehead body 3 a. - For a fixing procedure of the
fixation projections 11 to thehead body 3, although welding, etc., may be used, for example, a procedure in which screws 12 are used may be preferably employed, as illustrated inFIG. 4 . Thefixation projections 11 may be provided withfixation holes 13 into which thescrews 12 are inserted. As illustrated in the figure, the fixation holes 13 preferably include counterbores into which the heads of thescrews 12 are fit. - Furthermore, the widths of portions extending from the upper edge surface in the heel-to-toe direction of the
fixation projections 11 may be made shorter, as illustrated in the figure, so that the vibration of theface member 4 is less likely to be restricted. - The above-described embodiments do not limit the configurations of the present invention. Therefore, omissions, replacements, and/or additions of constituent elements of each component in the above-described embodiments can be made based on the disclosure of the specification of the present application and technical common knowledge, and thus, all such modifications thereof shall be construed as being within the scope of the present invention.
- The present invention may be applied also to golf clubs other than putters, such as woods (for example, drivers) and irons (for example, approach wedges).
- The shape of the face member as viewed from the front according to the golf club of the other embodiment of the present invention is not limited to the rectangular shape and may be in any shape, such as an oblong shape, a semi-elliptical shape, and a triangle shape. However, when considering the diameter of a ball, the face member is preferably in a shape in which a lower edge of the face member extends linearly in the heel-to-toe direction or is in a slightly downwardly convex shape so that a user can hit the ball at the center of the face member, without the club head being brought into contact with the ground.
- A fixation method for the face member in the golf club of the other embodiment of the present invention is not limited to the methods according to the above-described embodiments, and any method can be adopted.
- For example, the face member may be fixed to the head body by using a pin which penetrates from the head body to the upper edge surface of the face member. Furthermore, when using a set screw, the lower side of the face member may be fixed by the set screw, or both the upper and lower sides may be fixed by the set screw.
- Still further, also when providing the fixation projections to the face member, the fixation projections may be provided at the upper portion and the lower portion so as to fix the both upper and lower edges. In such a case, the fixation projection at the lower side may be simply fit into a fitting recess portion of the head body without being screwed. According to such a configuration, a bottom wall of the head body can be easily made thinner.
- Furthermore, the face member in the golf club of the embodiment of the present invention may be fixed to the head body only at a single location of the upper edge surface, a single location of the lower edge surface, or each single location at the upper and lower edge surfaces. Moreover, a fixed location at the upper edge surface in the horizontal direction may differ from a fixed location at the lower edge surface in the horizontal direction. For an example, an upper end of one of two resonance points of the face member and a lower end of the other one of the two resonance points of the face member may be fixed, whereas a lower end of the one resonance point and an upper end of the other resonance point may not be fixed.
- In addition, according to the golf club of the embodiments of the present invention, the head body may include a through-hole through which a sound can be passed, at the peripheral wall or the rear wall of the cavity.
- The golf club according to the present invention can be preferably used as a putter, in particular.
-
- 1 shaft
- 2,2 a club head
- 3,3 a head body
- 4,4 a face member
- 5 cavity
- 6 screw hole
- 7 fixing pin
- 8 set screw
- 9 upper counterbore
- 10 lower counterbore
- 11 fixation projection
- 12 screw
- 13 fixation hole
Claims (5)
1. A golf club comprising a shaft, and a club head provided at an end of the shaft, wherein
the club head comprises a head body, and a plate-like face member provided along a hitting face of the head body, and
the face member is fixed to the head body only at a part of an upper edge surface, a part of a lower edge surface, or parts of both the upper and lower edge surfaces of the face member.
2. The golf club according to claim 1 , wherein a fixing position of the face member is located in a proximity of a node of a characteristic vibration in a case of freely supporting the face member.
3. The golf club according to claim 1 , wherein a Rockwell C-scale hardness of the face member is no less than 40.
4. The golf club according to claim 1 , wherein the face member is fixed to the head body by a set screw.
5. The golf club according to claim 1 , wherein the face member is fixed to the head body at two locations of the upper edge surface, and two locations of the lower edge surface of the face member.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2016-058836 | 2016-03-23 | ||
JP2016058836A JP2017169785A (en) | 2016-03-23 | 2016-03-23 | Golf club |
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US20170274254A1 true US20170274254A1 (en) | 2017-09-28 |
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US15/459,018 Abandoned US20170274254A1 (en) | 2016-03-23 | 2017-03-15 | Golf club |
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US (1) | US20170274254A1 (en) |
JP (1) | JP2017169785A (en) |
KR (1) | KR20170110522A (en) |
CN (1) | CN107261440A (en) |
TW (1) | TW201735972A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11572993B2 (en) * | 2018-09-12 | 2023-02-07 | Valeo Vision | Light module for motor vehicle headlamp |
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Publication number | Priority date | Publication date | Assignee | Title |
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US20200246668A1 (en) * | 2019-02-01 | 2020-08-06 | Conor Fallon | Putter with interchangeable faceplate system |
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JPH0750205Y2 (en) * | 1989-06-06 | 1995-11-15 | 沖電気工業株式会社 | Recorder structure |
US5261664A (en) * | 1989-06-12 | 1993-11-16 | Donald Anderson | Golf club head and method of forming same |
US5297794A (en) * | 1993-01-14 | 1994-03-29 | Lu Clive S | Golf club and golf club head |
US6238303B1 (en) * | 1996-12-03 | 2001-05-29 | John Fite | Golf putter with adjustable characteristics |
US5913707A (en) * | 1997-02-26 | 1999-06-22 | Myriad Enterprises | Devices having magnetically levitating component |
JP2000279561A (en) * | 1999-03-30 | 2000-10-10 | Endo Mfg Co Ltd | Golf club and manufacture thereof |
CN2557184Y (en) * | 2002-06-17 | 2003-06-25 | 明安国际企业股份有限公司 | Golf club head with ipmroved hitting sound |
JP4683526B2 (en) * | 2004-05-21 | 2011-05-18 | Sriスポーツ株式会社 | Golf club head |
JP2007190243A (en) * | 2006-01-20 | 2007-08-02 | Yokohama Rubber Co Ltd:The | Golf club head and its production method |
US7604550B1 (en) * | 2006-12-12 | 2009-10-20 | Marvin Kirk Currie | Sand wedge with an interchangeable faceplate |
US8210965B2 (en) * | 2010-04-15 | 2012-07-03 | Cobra Golf Incorporated | Golf club head with face insert |
US20120088599A1 (en) * | 2010-10-07 | 2012-04-12 | Bridgestone Sports Co., Ltd | Putter head |
-
2016
- 2016-03-23 JP JP2016058836A patent/JP2017169785A/en active Pending
-
2017
- 2017-03-15 US US15/459,018 patent/US20170274254A1/en not_active Abandoned
- 2017-03-21 TW TW106109364A patent/TW201735972A/en unknown
- 2017-03-21 KR KR1020170035088A patent/KR20170110522A/en not_active Application Discontinuation
- 2017-03-22 CN CN201710173081.9A patent/CN107261440A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11572993B2 (en) * | 2018-09-12 | 2023-02-07 | Valeo Vision | Light module for motor vehicle headlamp |
Also Published As
Publication number | Publication date |
---|---|
CN107261440A (en) | 2017-10-20 |
KR20170110522A (en) | 2017-10-11 |
JP2017169785A (en) | 2017-09-28 |
TW201735972A (en) | 2017-10-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: YAMAHA CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MORI, TERUMITSU;REEL/FRAME:043445/0632 Effective date: 20170808 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |