US20120071258A1 - Golf club - Google Patents

Golf club Download PDF

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Publication number
US20120071258A1
US20120071258A1 US13/234,208 US201113234208A US2012071258A1 US 20120071258 A1 US20120071258 A1 US 20120071258A1 US 201113234208 A US201113234208 A US 201113234208A US 2012071258 A1 US2012071258 A1 US 2012071258A1
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US
United States
Prior art keywords
adjusting mechanism
head
golf club
shaft
grip
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
Application number
US13/234,208
Other languages
English (en)
Inventor
Tetsuo Yamaguchi
Tomio Kumamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dunlop Sports Co Ltd
Original Assignee
SRI Sports Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SRI Sports Ltd filed Critical SRI Sports Ltd
Assigned to SRI SPORTS LIMITED reassignment SRI SPORTS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUMAMOTO, TOMIO, YAMAGUCHI, TETSUO
Publication of US20120071258A1 publication Critical patent/US20120071258A1/en
Priority to US14/581,777 priority Critical patent/US20150111658A1/en
Assigned to DUNLOP SPORTS CO. LTD. reassignment DUNLOP SPORTS CO. LTD. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SRI SPORTS LIMITED
Priority to US15/406,200 priority patent/US20170128788A1/en
Abandoned legal-status Critical Current

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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
    • A63B60/06—Handles
    • A63B60/22—Adjustable handles
    • A63B60/28—Adjustable handles with adjustable length
    • 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
    • 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
    • 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
    • A63B53/005—Club sets
    • 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
    • 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
    • A63B53/02—Joint structures between the head and the shaft
    • 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
    • A63B53/02—Joint structures between the head and the shaft
    • A63B53/022—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft
    • A63B53/023—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft adjustable angular orientation
    • 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
    • A63B53/02—Joint structures between the head and the shaft
    • A63B53/022—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft
    • A63B53/023—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft adjustable angular orientation
    • A63B53/025—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft adjustable angular orientation lie angle only, i.e. relative angular adjustment between the shaft and the club head about an axis parallel to the intended line of play when the club is in its normal address position
    • 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
    • A63B53/0412—Volume
    • 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
    • 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
    • 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
    • A63B53/0445—Details of grooves or the like on the impact surface
    • 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
    • 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
    • A63B53/047—Heads iron-type
    • 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
    • A63B53/06—Heads adjustable
    • 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
    • A63B53/08—Golf clubs with special arrangements for obtaining a variable impact
    • 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
    • A63B60/06—Handles
    • A63B60/22—Adjustable handles
    • A63B60/24—Weighted handles
    • 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
    • A63B2053/0491—Heads with added weights, e.g. changeable, replaceable
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A63B2209/023—Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
    • 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
    • A63B53/02—Joint structures between the head and the shaft
    • A63B53/022—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft
    • A63B53/023—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft adjustable angular orientation
    • A63B53/026—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft adjustable angular orientation loft angle only, i.e. relative angular adjustment between the shaft and the club head about a horizontal axis perpendicular to the intended line of play when the club is in its normal address position
    • 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
    • A63B53/02—Joint structures between the head and the shaft
    • A63B53/022—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft
    • A63B53/028—Joint structures between the head and the shaft allowing adjustable positioning of the head with respect to the shaft with a range of alternative attachment points for the shaft
    • 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
    • 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
    • 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
    • A63B53/0433—Heads with special sole configurations
    • 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
    • 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
    • A63B53/06—Heads adjustable
    • A63B53/065—Heads adjustable for putters
    • 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
    • A63B53/10—Non-metallic shafts

Definitions

  • the present invention relates to a golf club.
  • the present invention relates to a golf club having adjustability.
  • golf players select and use golf clubs suited to themselves.
  • the number of golf clubs capable of being used during playing golf is 14 in respect of the Golf Rules.
  • the golf players usually select 14 clubs and make a round.
  • a condition may be varied according to days even in the same golf player.
  • Setting of a golf course also has an influence on selection of the golf club.
  • Weather also has an influence on the selection of the golf club.
  • it is advantageous to prepare changing golf clubs. In order to improve a degree of freedom of selection, it is advantageous to prepare changing golf clubs.
  • a specification can be adjusted.
  • One golf club having adjustability can be adjusted to a plurality of specifications.
  • the adjustability can eliminate the use of the changing golf club.
  • Japanese Patent Application Laid-Open No. 9-201433 discloses a golf club having a variable loft angle.
  • Japanese Patent Application Laid-Open No. 2004-267460 discloses a golf club having an adjustable face angle.
  • US 2006/0293115 discloses a structure where a head is easily mounted and detached to and from a shaft. An embodiment in which a shaft axis inclined to a hosel axis is shown in FIG. 17 of US 2006/0293115. In the embodiment of FIG. 17 of US 2006/0293115, a loft angle, a lie angle, and a face angle are varied in relation to each other due to a circumferential position of a sleeve.
  • a golf club of the present invention comprises at least one adjusting mechanism.
  • at least two specifications can be adjusted independently of each other.
  • a head, a shaft, a grip, or a joined part therebetween has an adjusting mechanism ( 1 ).
  • the head, the shaft, the grip, or the joined part has further other adjusting mechanism ( 2 ).
  • the adjusting mechanism ( 1 ) and the adjusting mechanism ( 2 ) can work independently of each other.
  • the joined part means a joined part between the head and the shaft, and a joined part between the shaft and the grip.
  • the adjusting mechanism ( 1 ) or the adjusting mechanism ( 2 ) is located at a place other than a hosel part.
  • the adjusting mechanism ( 1 ) and the adjusting mechanism ( 2 ) are located at places other than a hosel part.
  • all the adjusting mechanisms are located at places other than a hosel part.
  • the two or more specifications selected from a loft angle, a lie angle, a face angle, a face area, a position of a center of gravity of a head, a swingweight, a club length, a position of a center of gravity of a club, a frequency of the club, a club weight, a head shape, a head volume, a head weight, a flex of a shaft, a flex point of a shaft, a torque of the shaft, flexural rigidity distribution of the shaft, torsional rigidity distribution of the shaft, a shaft weight, weight distribution of the shaft, a position of a center of gravity of the shaft, a length of the shaft, a grip outer diameter, a grip weight, a position of a center of gravity of a grip, a grip length, a specification of a face groove, a face progression, a moment of inertia of the head, a moment of inertia of the club, a coefficient of restitution
  • the number of the specifications capable of being adjusted independently of each other may be equal to or greater than 3, and furthermore equal to or greater than 4.
  • the plurality of specifications includes one or more specific specifications selected from a loft angle, a lie angle, a club length, and a club weight.
  • An adjustment range is equal to or greater than a width corresponding to two-number clubs in all the specific specifications.
  • a golf club set of the present invention comprises the plurality of golf clubs.
  • FIG. 1 is a perspective view of a head provided with an adjusting mechanism M 1 (front member changing mechanism);
  • FIG. 2 is an exploded view of the head of FIG. 1 ;
  • FIG. 3 is a view for explaining change of the front member
  • FIG. 4 is a view of the head of FIG. 1 , as viewed from a sole side;
  • FIG. 5 is a perspective view of the head provided with an adjusting mechanism M 2 (face plate changing mechanism);
  • FIG. 6 is a view for explaining change of a face plate
  • FIG. 7 is a view showing a golf club provided with an adjusting mechanism M 3 (club length adjusting mechanism);
  • FIG. 8 is a view for explaining adjustment of a club length
  • FIG. 9 is a view showing a golf club provided with an adjusting mechanism M 4 (lie angle adjusting mechanism);
  • FIG. 10 is a view of the golf club of FIG. 9 , as viewed from a sole side;
  • FIG. 11 is a cross sectional view of the golf club of FIG. 9 ;
  • FIG. 12 is a cross sectional view taken along line Cs 1 -Cs 1 of FIG. 11 , a cross sectional view taken along line Cs 2 -Cs 2 , and a cross sectional view taken along line Cs 3 -Cs 3 ;
  • FIG. 13 is a view for explaining adjustment of a lie angle
  • FIG. 14 is a view showing a golf club provided with an adjusting mechanism M 4 and an adjusting mechanism M 5 ;
  • FIG. 15 is a view of the golf club of FIG. 14 , as viewed from a sole side;
  • FIG. 16 is a view showing a golf club provided with an adjusting mechanism M 4 , an adjusting mechanism M 5 , and an adjusting mechanism M 6 ;
  • FIG. 17 is a cross sectional view of a golf club provided with an adjusting mechanism M 6 ;
  • FIG. 18 is a view of a golf club provided with an adjusting mechanism M 7 ;
  • FIG. 19 is an exploded view of the golf club of FIG. 18 ;
  • FIG. 20 is a cross sectional view of the golf club of FIG. 18 ;
  • FIG. 21 is a perspective view of a sleeve used for the golf club of FIG. 18 ;
  • FIG. 22 is a cross sectional view of a first sleeve
  • FIG. 23 is a cross sectional view of a second sleeve
  • FIG. 24 is an exploded perspective view of a golf club head provided with an adjusting mechanism M 8 ;
  • FIG. 25 is a view for explaining change of a back member
  • FIG. 26 is a view showing a golf club provided with an adjusting mechanism M 9 ;
  • FIG. 27 is a cross sectional view of FIG. 26 ;
  • FIG. 28 is a cross sectional view of the golf club taken along line F 28 -F 28 of FIG. 27 ;
  • FIG. 29 is a view showing a golf club provided with an adjusting mechanism M 10 ;
  • FIG. 30 is a cross sectional view of FIG. 29 ;
  • FIG. 31 is an exploded view of FIG. 29 ;
  • FIG. 32 is an exploded view of other golf club provided with an adjusting mechanism M 10 ;
  • FIG. 33 is an exploded perspective view of a golf club head provided with an adjusting mechanism M 1 and an adjusting mechanism M 11 ;
  • FIG. 34 is a view of the head of FIG. 33 , as viewed from a crown side;
  • FIG. 35 is an exploded perspective view of a head provided with an adjusting mechanism M 12 ;
  • FIG. 36 is an exploded view of a club provided with an adjusting mechanism M 6 and an adjusting mechanism M 10 ;
  • FIG. 37 is a bottom view of a golf club provided with an adjusting mechanism M 13 ;
  • FIG. 38 is a perspective view of a golf club head provided with an adjusting mechanism M 14 ;
  • FIG. 39 is an exploded perspective view of the head of FIG. 38 ;
  • FIG. 40 is a cross sectional view of the head of FIG. 38 ;
  • FIG. 41 is a plan view of a golf club head provided with an adjusting mechanism M 15 ;
  • FIG. 42 is a cross sectional view taken along line F 41 -F 41 of FIG. 41 ;
  • FIG. 43 is a bottom view of the head of FIG. 41 .
  • An adjusting mechanism in the present invention satisfies the Golf Rules defined by Royal and Ancient Golf Club of Saint Andrews (R&A). That is, the adjusting mechanism in the present invention satisfies requirements specified in “1b adjustability” in “1 Club” of “Appendix II design of club” defined by R&A.
  • the requirements defined by the “1b adjustability” are the following items (i), (ii), and (iii):
  • FIG. 1 shows a head 2 .
  • the head 2 is provided with an adjusting mechanism M 1 capable of being used for the present invention.
  • the adjusting mechanism M 1 is used with other adjusting mechanisms independent of each other.
  • a golf club provided with the head 2 is provided with the head 2 , a shaft and a grip.
  • the head 2 is a wood type golf club head.
  • FIG. 2 is an exploded perspective view of the head 2 .
  • the head 2 has a front member 4 , a back member 6 , and a connecting member 8 .
  • the front member 4 is connected to the back member 6 by the connecting member 8 .
  • the front member 4 is connected to the back member 6 in a state where no gap substantially exists.
  • the hollow head 2 is completed by the connection.
  • the front member 4 has a face surface 10 .
  • the front member 4 has the whole face surface 10 .
  • the front member 4 has a screw hole into which the connecting member 8 is screwed, and a thick part for forming the screw hole.
  • the front member 4 is approximately cup-shaped as a whole. Although illustration is omitted, face grooves are formed in the face surface 10 .
  • the back member 6 has a hosel part 12 .
  • the hosel part 12 has a shaft hole 14 .
  • the back member 6 has a through hole 16 through which the connecting member 8 passes, and a thick part 18 for forming the through hole 16 .
  • the through hole 16 is formed on each of a toe side and heel side of the head 2 .
  • the thick part 18 is also formed on each of the toe side and heel side of the head 2 . Positions of the through hole 16 and thick part 18 are not restricted.
  • the back member 6 has a protruding part 20 .
  • a plurality of (two) protruding parts 20 is provided.
  • the protruding parts 20 protrude forward from an opening part of the back member 6 .
  • the protruding parts 20 facilitate position adjustment of the front member 4 .
  • the protruding parts 20 facilitate screwing between the front member 4 and the back member 6 .
  • the heel side through hole 16 is formed on the heel side from the shaft hole 14 .
  • the heel side thick part 18 is formed on the heel side from the shaft hole 14 .
  • the disposal can contribute to shortening of a length of the through hole 16 .
  • the disposal can contribute to lessening of a volume of the thick part 18 .
  • the disposal can contribute to miniaturizing of a screw mechanism.
  • the connecting member 8 is a screw.
  • the front member 4 is connected to the back member 6 by the connecting member 8 .
  • the head 2 has the adjusting mechanism M 1 .
  • the adjusting mechanism M 1 is a screwing mechanism between the front member 4 and the back member 6 .
  • the adjusting mechanism M 1 can change the front member 4 .
  • a changing front member E 4 is shown with the head 2 in FIG. 3 .
  • a changing front member E 41 and other changing front member E 42 are shown as the changing front member E 4 in FIG. 3 .
  • the changing front member E 41 and the changing front member E 42 can be connected to the back member 6 by the connecting member 8 .
  • a golf club with an adjusting function includes the head 2 and the at least one changing front member E 4 .
  • a loft angle (real loft angle) is changed by changing the front member 4 to the changing front member E 4 .
  • a face angle is changed by changing the front member 4 to the changing front member E 4 .
  • Examples of specifications capable of being adjusted by the adjusting mechanism M 1 include a loft angle, a face angle, a face area, and a face progression. Each of these specifications can be independently adjusted in the adjusting mechanism M 1 . Furthermore, in the adjusting mechanism M 1 , a coefficient of restitution of the head to a ball, and a friction coefficient of the head to the ball can be adjusted. The coefficient of restitution of the head to the ball can be adjusted by, for example, changing the front member to another changing front member having rigidity different from that of the front member. The friction coefficient of the head to the ball can be adjusted by, for example, changing the front member to another changing front member having a face surface having surface roughness different from that of the front member.
  • the adjusting mechanism M 1 may be used also for other type golf clubs (iron type, utility type, and putter type golf clubs or the like).
  • FIG. 5 is an exploded perspective view of a head 30 provided with an adjusting mechanism M 2 according to other embodiment.
  • FIG. 6 is a cross sectional view of the head 30 .
  • a golf club provided with the head 30 is provided with a shaft and a grip.
  • the head 30 is an iron type golf club head.
  • the adjusting mechanism M 2 is used with other adjusting mechanism.
  • the head 30 has a face plate 32 , a head body 34 , and a connecting member 36 .
  • the face plate 32 is connected to the head body 34 by the connecting member 36 .
  • the face plate 32 is connected to the head body 34 in a state where no gap substantially exists.
  • the head 30 having a cavity 38 (see FIG. 6 ) formed in a back face is completed by the connection.
  • a plane p 1 provided on a back surface of the face plate 32 is brought into surface contact with a plane p 2 provided on a front surface of the head body 34 (see FIG. 6 ).
  • the face plate 32 has a face surface 40 .
  • the face plate 32 has the whole face surface 40 .
  • the face plate 32 has a screw hole into which the connecting member 36 is screwed.
  • the face plate 32 is a plate-shaped as a whole. Face grooves 42 are formed in the face surface 40 .
  • the head body 34 has a hosel part 44 .
  • the hosel part 44 has a shaft hole 46 .
  • the head body 34 has a through hole 48 through which the connecting member 36 passes.
  • the through hole 48 is formed on each of a toe side and heel side of the head body 34 . A position of the through hole 48 is not restricted.
  • the connecting member 36 is a screw.
  • the face plate 32 is connected to the head body 34 by the connecting member 36 .
  • the head 2 has an adjusting mechanism M 2 .
  • the adjusting mechanism M 2 is a screwing mechanism between the face plate 32 and the head body 34 .
  • the adjusting mechanism M 2 can change the face plate 32 .
  • FIG. 6 shows a cross sectional view of a changing face plate E 32 with a cross sectional view of the head 30 .
  • a first changing face plate E 321 and a second changing face plate E 322 are shown as the changing face plate E 32 in FIG. 6 .
  • the changing face plate E 32 can be connected to the head body 34 by the connecting member 36 .
  • a golf club with an adjusting function includes the head 30 and at least one changing face plate E 32 .
  • a loft angle (real loft angle) is changed by changing the face plate 32 to the changing face plate E 32 .
  • a specification of the face groove is changed by changing the face plate 32 to the changing face plate E 32 .
  • Examples of specifications capable of being adjusted by the adjusting mechanism M 2 include a loft angle, a specification of the face groove, a face progression, and a friction coefficient of a head to a ball. Each of these specifications can be independently adjusted in the adjusting mechanism M 2 .
  • the adjusting mechanism M 2 may be used also for other type golf clubs (wood type, utility type, and putter type golf clubs or the like).
  • FIG. 7 shows a golf club 50 according to other adjusting mechanism.
  • the golf club 50 is provided with a head 52 , a shaft 54 , a sleeve 56 , and a grip (not shown).
  • the head 52 is a wood type golf club head.
  • the shaft 54 is tube-shaped.
  • the golf club 50 has an adjusting mechanism M 3 .
  • the golf club 50 has other adjusting mechanisms independent of each other, with the adjusting mechanism M 3 .
  • the golf club 50 has a plurality of connecting members 58 .
  • the golf club 50 of the embodiment has three connecting members 58 (see FIG. 7 ).
  • the golf club 50 has a first connecting member 581 , a second connecting member 582 , and a third connecting member 583 as the connecting members 58 .
  • FIG. 8 is a cross sectional view of the golf club 50 .
  • a section of a hosel portion is shown in FIG. 8 .
  • a left side (configuration S 1 ) of FIG. 8 shows a state where the first connecting member 581 is used.
  • a center (configuration S 2 ) of FIG. 8 shows a state where the second connecting member 582 is used.
  • a right side (configuration S 3 ) of FIG. 8 shows a state where the third connecting member 583 is used.
  • the head 52 has a hosel hole 60 .
  • the sleeve 56 is inserted into the hosel hole 60 .
  • a cross sectional shape of the hosel hole 60 corresponds to a cross sectional shape of an outer surface of the sleeve 56 .
  • the sleeve 56 has a shaft hole 62 and a screw hole 63 .
  • the shaft hole 62 is opened upward.
  • the screw hole 63 is downwardly opened.
  • a tip part of the shaft 54 is inserted into the shaft hole 62 .
  • the sleeve 56 is fixed to the tip part of the shaft 54 .
  • the sleeve 56 is bonded to the tip part of the shaft 54 .
  • An outer surface 66 of the sleeve 56 has a portion having a noncircular cross sectional shape.
  • the outer surface 66 of the sleeve 56 has a hexagonal cross sectional shape.
  • the hosel hole 60 also has a noncircular (hexagonal) cross sectional shape. Rotation of the sleeve 56 to the hosel hole 60 is regulated by these noncircular cross sectional shapes.
  • the outer surface of the sleeve 56 and the hosel hole 60 may have a circular cross sectional shape. Regulation of relative rotation can be also achieved by only the connecting member 58 .
  • the connecting member 58 has a head part r 1 , an axis part r 2 , and a screw part r 3 .
  • the axis part r 2 is provided between the head part r 1 and the screw part r 3 .
  • the plurality of connecting members 58 has different lengths.
  • the different lengths are achieved by a difference in the length of the axis part r 2 .
  • the screw part r 3 of the connecting member 58 is connected to the screw hole 63 of the sleeve 56 . Withdrawal of the sleeve 56 from the shaft hole 62 is prevented by the screw connection.
  • an insertion length Ls (see FIG. 8 ) of the sleeve 56 to the shaft hole 62 is varied depending on the connecting member 58 to be used. A club length is changed due to the variation.
  • the golf club 50 has an adjusting mechanism M 3 .
  • the adjusting mechanism M 3 is an changing mechanism of a shaft insertion length.
  • the club length is changed by the adjusting mechanism M 3 .
  • a swingweight is changed by the adjusting mechanism M 3 .
  • adjustments of the specifications by the adjusting mechanism M 3 include the following adjustments:
  • Examples of means for realizing the (adjustment 3a) include reducing a weight of a longer connecting member 58 .
  • Examples of the means include using a material having smaller specific gravity for a longer connecting member 58 , and reducing an outer diameter of an axis part r 2 of a longer connecting member 58 .
  • the adjusting mechanism M 3 may be used also for other type golf clubs (iron type, utility type, and putter type golf clubs or the like).
  • FIG. 9 shows a golf club 70 according to other adjusting mechanism.
  • FIG. 10 is a view of the golf club 70 , as viewed from a sole side.
  • FIG. 11 is a cross sectional view of a vicinity of a hosel of the golf club 70 .
  • FIG. 12 is a cross sectional view in each of positions shown in FIG. 11 .
  • the golf club 70 is provided with a head 72 , a shaft 74 , a sleeve 76 , a connecting member 78 (see FIG. 11 ), and a grip (not shown).
  • the head 72 is a wood type golf club head.
  • the shaft 74 is tube-shaped.
  • the golf club 70 has an adjusting mechanism M 4 .
  • the golf club 70 has further other adjusting mechanism independent of the adjusting mechanism M 4 .
  • the head 72 has a hosel part 73 .
  • the hosel part 73 has a sleeve insertion hole 75 (see FIG. 11 ).
  • the sleeve 76 is bonded to the shaft 74 .
  • the sleeve 76 has a screw hole 77 .
  • the screw hole 77 is formed in a bottom surface 79 of the sleeve 76 .
  • the golf club 70 has a plurality of sleeve supporting members 80 (see FIG. 11 ).
  • the golf club 70 has a first sleeve supporting member 801 , a second sleeve supporting member 802 , and a third sleeve supporting member 803 as the sleeve supporting members 80 .
  • the connecting member 78 is a screw.
  • the connecting member 78 has a head part r 1 and a screw part r 3 (see FIG. 11 ).
  • a concave part 81 for axially rotating the connecting member 78 is formed in the head part r 1 of the connecting member 78 (see FIG. 10 ).
  • the concave part 81 has a noncircular cross sectional shape.
  • the connecting member 78 is screw-connected to the screw hole 77 . Retention of the shaft 74 is achieved by the screw connection.
  • the golf club 70 has the adjusting mechanism M 4 .
  • the adjusting mechanism M 4 can adjust a lie angle.
  • the golf club 70 of the embodiment can be adjusted to three lie angles.
  • the lie angle is adjusted by changing a direction of a shaft axis line.
  • the sleeve insertion hole 75 does not disturb adjustment of the lie angle.
  • a shaft axis line in the case of a first lie angle is represented by reference character LS (see FIGS. 9 and 11 ).
  • a shaft axis line in the case of a second lie angle is represented by reference character LF.
  • a shaft axis line in the case of a third lie angle is represented by reference character LU.
  • the head 72 has a plurality of holding holes h 1 .
  • the head 72 has a first holding hole h 11 , a second holding hole h 12 , and a third holding hole h 13 .
  • FIG. 11 shows profile lines of the holding holes h 1 , as viewed from the lower side of the head 72 , in addition to a cross sectional view of the golf club 70 .
  • a central axis line of the first holding hole h 11 coincides with the shaft axis line LS.
  • a central axis line of the second holding hole h 12 coincides with the shaft axis line LF.
  • a central axis line of the third holding hole h 13 coincides with the shaft axis line LU.
  • Each of the holding holes h 1 is positioned so that a central axis line of (the head part r 1 of) the connecting member 78 coincides with a position of any one of the plurality of shaft axis lines.
  • the plurality of holding holes h 1 is mutually and partially overlapped. Adjustment interval of the lie angle can be reduced by the partial overlapping. The lie angle can be delicately adjusted by the partial overlapping.
  • the head 72 has a plurality of insertion holes h 2 .
  • the connecting member 78 is inserted into the insertion holes h 2 .
  • the insertion holes h 2 do not appear in the cross sectional view of FIG. 11 .
  • the head 72 has a first insertion hole h 21 , a second insertion hole h 22 , and a third insertion hole h 23 .
  • the profile lines of the insertion holes h 2 as viewed from the lower side of the head 72 are also shown.
  • a central axis line of the first insertion hole h 21 coincides with the shaft axis line LS.
  • a central axis line of the second insertion hole h 22 coincides with the shaft axis line LF.
  • a central axis line of the third insertion hole h 23 coincides with the shaft axis line LU.
  • the plurality of insertion holes 12 is mutually and partially overlapped. Adjustment interval of the lie angle can be reduced by the partial overlapping. The lie angle can be delicately adjusted by the partial overlapping.
  • the holding hole h 1 and the insertion hole h 2 are continuous. A diameter of the holding hole h 1 is greater than that of the insertion hole h 2 .
  • a bump surface d 1 exists on a boundary between the holding hole h 1 and the insertion hole h 2 . The bump surface d 1 abuts on a bump surface d 2 of the connecting member 78 .
  • the sleeve supporting member 80 has a through hole 88 and an outer surface 90 .
  • a through hole 88 of a first sleeve supporting member 801 corresponds to the shaft axis line LS.
  • a through hole 88 of a second sleeve supporting member 802 corresponds to the shaft axis line LF.
  • a through hole 88 of a third sleeve supporting member 803 corresponds to the shaft axis line LU.
  • An outer surface 90 of the sleeve supporting member 80 is a screw.
  • a screw (female screw) 92 capable of being connected to the screw (male screw) of the outer surface 90 is formed in an inner surface of the sleeve insertion hole 75 (see FIG. 11 ).
  • the sleeve supporting member 80 is fixed to the sleeve insertion hole 75 by screw connection.
  • the screw connection may be absent.
  • the outer surface 90 of the sleeve supporting member 80 may have a noncircular cross sectional shape, and the cross sectional shape of the inner surface of the sleeve insertion hole 75 abutting on the outer surface 90 also may correspond to the cross sectional shape of the outer surface 90 . In this case, rotation of the sleeve supporting member 80 to the sleeve insertion hole 75 is prevented due to the noncircular cross sectional shape.
  • the sleeve supporting member 80 supports the sleeve 76 along a predetermined axial direction. Simultaneously, the sleeve supporting member 80 disturbs relative rotation of the sleeve 76 and the sleeve insertion hole 75 .
  • FIG. 13 shows states of three lie angles.
  • a left side (configuration S 4 ) of FIG. 13 shows a cross sectional view when the shaft axis line LU is employed.
  • the third sleeve supporting member 803 of the plurality of sleeve supporting members 80 is used.
  • the holding hole h 13 is used as the holding hole h 1 .
  • the insertion hole h 23 is used as the insertion hole h 2 .
  • the lie angle is comparatively upright. That is, the lie angle is comparatively great.
  • a center (configuration S 5 ) of FIG. 13 shows a cross sectional view when the shaft axis line LS is employed.
  • the first sleeve supporting member 801 of the plurality of sleeve supporting members 80 is used.
  • the holding hole h 11 is used as the holding hole h 1 .
  • the insertion hole h 21 is used as the insertion hole h 2 .
  • a right side (configuration S 6 ) of FIG. 13 shows a cross sectional view when the shaft axis line LF is employed.
  • a second sleeve supporting member 802 of the plurality of sleeve supporting members 80 is used.
  • the holding hole h 12 is used as the holding hole h 1 .
  • the insertion hole h 22 is used as the insertion hole h 2 .
  • the lie angle is comparatively flat. That is, the lie angle is comparatively small.
  • support of the sleeve 76 in each of the lie angles is achieved by the sleeve supporting member 80 and the holding hole h 1 .
  • the support of the sleeve 76 in each of the lie angles may be achieved by only the sleeve supporting member 80 .
  • the support of the sleeve 76 in each of the lie angles may be achieved by only the holding hole h 1 .
  • the support of the sleeve 76 in each of the lie angles is preferably achieved by either the sleeve supporting member 80 or the holding hole h 1 .
  • a resin is also preferably used as a material of the sleeve supporting member 80 .
  • the sleeve supporting member 80 made of the resin is suitable for supporting the sleeve 76 while being deformed so as to absorb a dimensional gap.
  • rotation stopping of the sleeve 76 is achieved by the sleeve supporting member 80 and the connecting member 78 .
  • the rotation stopping of the sleeve 76 may be achieved by only the sleeve supporting member 80 .
  • the rotation stopping of the sleeve 76 may be achieved by only the connecting member 78 .
  • the connecting member 78 is made to function as the rotation stopping of the sleeve 76
  • the connecting member 78 is preferably tightened by a force received from a ball at hitting the ball.
  • the holding hole h 1 and the head part r 1 preferably have a noncircular cross sectional shape, to prevent relative rotation of the holding hole h 1 and the head part r 1 .
  • FIGS. 14 and 15 show a golf club 100 according to other adjusting mechanism.
  • FIG. 15 is a view, as viewed from a sole side.
  • the golf club 100 is provided with a head 102 , a shaft 74 , a sleeve 76 , a connecting member 78 (see FIG. 15 ), and a grip (not shown).
  • the head 102 is a wood type golf club head.
  • the shaft 74 is tube-shaped.
  • the head 102 has the above-mentioned adjusting mechanism M 4 .
  • the description of the adjusting mechanism M 4 is omitted.
  • the head 102 has an adjusting mechanism M 5 .
  • the adjusting mechanism M 5 is a center-of-gravity position adjusting mechanism.
  • the head 102 has a weight body 104 and a disposing hole Wh as the adjusting mechanism M 5 .
  • a plurality of disposing holes Wh are formed. These disposing holes Wh are formed in a sole 106 of the head 102 .
  • the disposing hole Wh is a screw hole.
  • the weight body 104 is a screw.
  • the weight body 104 is screwed into the disposing holes Wh.
  • the position of the center of gravity of the head is adjusted depending on the disposing hole Wh in which the weight body 104 is located.
  • Examples of specifications capable of being adjusted by the adjusting mechanism M 5 include a position of a center of gravity of a head and a moment of inertia of the head.
  • a distance of a center of gravity is changed; any one of a depth of the center of gravity and a height of the center of gravity is varied; and the other is not substantially varied.
  • the plurality of disposing holes Wh is substantially aligned along a toe-heel direction. That is, a central axis line SP 1 of a first disposing hole Wh 1 , a central axis line SP 2 of a second disposing hole Wh 2 , and a central axis line SP 3 of a third disposing hole Wh 3 are aligned along the toe-heel direction.
  • a distance of a center of gravity is mainly varied by the disposal, and a depth of the center of gravity is hardly varied.
  • a ratio (Cd/Cs) is preferably equal to or less than 0.2, and more preferably equal to or less than 0.1.
  • the distance of the center of gravity can be selectively adjusted. It is useful to selectively adjust the distance of the center of gravity in order to adjust the direction of the face in impact.
  • the adjusting mechanism M 5 may be used also for other type golf clubs (iron type, utility type, and putter type golf clubs or the like).
  • FIG. 16 shows a golf club 110 according to other adjusting mechanism.
  • the golf club 110 is provided with a head 102 , a shaft 74 , a sleeve 76 , a connecting member 78 (not shown), and a grip 112 .
  • the head 102 has the above-mentioned adjusting mechanism M 4 and adjusting mechanism M 5 .
  • the descriptions of the adjusting mechanism M 4 and the adjusting mechanism M 5 are omitted.
  • the grip 112 has a main body 114 , a weight body Wg, and a holding body 118 . Furthermore, the grip 112 has a cover 120 .
  • the holding body 118 has a screw hole 122 .
  • the holding body 118 is disposed medially in the shaft 74 .
  • the holding body 118 is bonded to an inner surface of the shaft 74 .
  • the weight body Wg is detachably mounted to the holding body 118 .
  • the mounting/demounting is achieved by a screw mechanism.
  • the main body 114 is made of rubber.
  • a concave part 124 is formed in a vicinity of a back end part of the main body 114 .
  • the concave part 124 is a circumferential groove.
  • the cover 120 has a convex part 126 corresponding to the concave part 124 .
  • the convex part 126 is a flange.
  • the main body 114 made of rubber can be deformed, to fit the convex part 126 into the concave part 124 .
  • the cover 120 is detachably mounted.
  • the grip 112 has a weight adjusting mechanism as an adjusting mechanism M 6 .
  • the weight adjusting mechanism is achieved by changing the weight body Wg.
  • the swingweight can be adjusted by changing the weight body Wg to other weight body Wg having a weight different from that of the weight body Wg.
  • the swingweight is lightened by changing a first weight body Wg 1 to a second weight body Wg 2 having a weight greater than that of the first weight body Wg 1 .
  • the swingweight is weighted by changing the first weight body Wg 1 to a third weight body Wg 3 having a weight smaller than that of the first weight body Wg 1 .
  • the adjusting mechanism M 6 has at least two weight bodies Wg having weights different from each other.
  • Examples of specifications capable of being adjusted by the adjusting mechanism M 6 include a swingweight, a moment of inertia of a club, a grip weight, and a position of a center of gravity of a grip.
  • the adjusting mechanism M 6 may be used also for other type golf clubs (iron type, utility type, and putter type golf clubs or the like).
  • FIG. 18 shows a golf club 130 according to other adjusting mechanism.
  • FIG. 19 is an exploded view of the golf club 130 .
  • FIG. 20 is a cross sectional view of the golf club 130 .
  • the golf club 130 has an adjusting mechanism M 7 .
  • the golf club 130 further has other adjusting mechanism independent of the adjusting mechanism M 7 .
  • the golf club 130 has a head 132 , a shaft 134 , a sleeve Sv, a screw cylinder 135 , and a connecting member 136 .
  • the screw cylinder 135 is fixed to a tip of the shaft 134 .
  • a grip (not shown) is mounted to a back end of the shaft 134 .
  • the head 132 has a head body 138 and an engaging member 140 .
  • the head body 138 has a hosel hole 142 into which the sleeve Sv is inserted, and a through hole 144 into which the connecting member 136 is inserted.
  • the through hole 144 penetrates a bottom part of the hosel hole 142 .
  • the head body 138 has a sole hole 146 opened in a sole (see FIG. 20 ).
  • the sole hole 146 is continuous with the hosel hole 142 via the through hole 144 .
  • the engaging member 140 is fixed to the head body 138 (see FIG. 20 ).
  • the fixing method is not restricted, and examples thereof include bonding, welding, fitting, and a combination thereof.
  • the engaging member 140 is introduced into the hosel hole 142 from an upper side opening of the hosel hole 142 .
  • the engaging member 140 is fixed to the bottom part of the hosel hole 142 .
  • FIG. 21 is a perspective view of the sleeve Sv.
  • FIG. 22 is a cross sectional view of the sleeve Sv.
  • the sleeve Sv has a shaft insertion hole 150 and a lower side hole 152 .
  • the shaft insertion hole 150 is opened to an upper side.
  • the lower side hole 152 is opened to a lower side.
  • the lower side hole 152 is disposed on a lower side of the shaft insertion hole 150 .
  • the sleeve Sv has an engaging part 162 .
  • the engaging part 162 has a convex part t 1 .
  • a plurality of convex parts t 1 is aligned in the circumferential direction.
  • the convex parts t 1 are equally disposed in the circumferential direction.
  • the convex parts t 1 are disposed at every 30 degrees.
  • an engaging surface capable of being engaged with the engaging part 162 of the sleeve Sv is formed in an inner surface of the engaging member 140 .
  • a cross sectional shape of the engaging surface corresponds to that of an outer surface of the engaging part 162 . Rotation of the sleeve Sv to the hosel hole 142 is prevented by engagement between the engaging surface (inner surface) of the engaging member 140 and the engaging part 162 .
  • the shaft insertion hole 150 is a screw hole. That is, the shaft insertion hole 150 is a female screw.
  • the screw cylinder 135 is approximately cylindrical-shaped as a whole.
  • An outer surface of the screw cylinder 135 is a screw.
  • the outer surface of the screw cylinder 135 is a male screw.
  • An inner surface 154 of the screw cylinder 135 is a circumferential surface.
  • An outer surface 156 of the shaft 134 is bonded to the inner surface 154 of the screw cylinder 135 .
  • the shaft insertion hole 150 of the sleeve Sv is screw-connected to the screw cylinder 135 .
  • the shaft 134 is fixed to the sleeve Sv by the screw connection.
  • Retention of the sleeve Sv is achieved by the screw connection.
  • the lower side hole 152 of the sleeve Sv is screw-connected to the connecting member 136 . Withdrawal of the sleeve Sv is prevented by the screw connection.
  • An axial force caused by the screw connection brings a hosel end face 158 into close contact with a bump surface 160 of the sleeve Sv.
  • a clearance K 1 exists between a tip of the connecting member 136 and a bottom surface of the lower side hole 152 in a state where the screw connection is completed (see FIG. 20 ).
  • a first sleeve Sv 1 and a second sleeve Sv 2 are prepared as the sleeve Sv (see FIG. 19 ).
  • the sleeve Sv 1 and the sleeve Sv 2 are mutually changeable. As described above, this is because the sleeve Sv is detachably mounted to the shaft 134 (screw cylinder 135 ) by the screw mechanism.
  • FIG. 22 is a cross sectional view of the first sleeve Sv 1 .
  • an axis line h 1 of the shaft insertion hole 150 is inclined to an axis line z 1 of the sleeve Sv.
  • the inclination angle ⁇ 1 is a maximum value of an angle between the axis line h 1 and the axis line z 1 .
  • the axis line z 1 of the sleeve Sv is substantially equal to an axis line of the hosel hole 142 .
  • FIG. 23 is a cross sectional view of the second sleeve Sv 2 .
  • the axis line h 1 of the shaft insertion hole 150 is not inclined to the axis line z 1 of the sleeve Sv.
  • the axis line h 1 of the shaft insertion hole 150 coincides with the axis line z 1 of the sleeve Sv.
  • Variation of the sleeve Sv is not restricted to the inclination angle of the shaft insertion hole 150 .
  • other sleeve Sv in which a position of the shaft insertion hole 150 is changed may be also used.
  • other sleeve Sv in which the shaft insertion hole 150 of the second sleeve Sv 2 is moved in parallel may be used.
  • the axis line z 1 is parallel to the axis line h 1
  • the axis line z 1 does not coincide with the axis line h 1 .
  • the adjusting mechanism M 7 of the embodiment is a sleeve changing mechanism.
  • one or more specifications selected from a loft angle, a lie angle, and a face angle are adjusted by changing the sleeve Sv.
  • Examples of specifications capable of being adjusted by the adjusting mechanism M 7 include a face progression, a lie angle, a loft angle, a face angle, a swingweight, a club length, a position of a center of gravity of a club, a frequency of the club, a moment of inertia of the club, a flex point of a shaft, a torque of the shaft, flexural rigidity of the shaft, torsional rigidity of the shaft, a shaft weight, weight distribution of the shaft, a position of a center of gravity of the shaft, and a length of the shaft.
  • the shaft can be changed without varying the loft angle, the lie angle, and the face angle.
  • a plurality of sleeves Sv in which the inclination angle ⁇ 1 is 0 degree and positions of the shaft insertion holes 150 are different from each other may be prepared.
  • the axis line of the shaft insertion hole 150 can be moved in parallel by changing the sleeve Sv.
  • the adjustment 7e and the adjustment 7f are possible.
  • FIG. 25 is an exploded perspective view of a head 170 used for a golf club according to other adjusting mechanism.
  • FIG. 26 is a cross sectional view of the head 170 .
  • the golf club is provided with the head 170 , and a shaft, and a grip.
  • the head 170 is a wood type golf club head.
  • the head 170 has an adjusting mechanism M 8 .
  • the golf club having the head 170 is further provided with other adjusting mechanism independent of the adjusting mechanism M 8 .
  • the head 170 has a front member 172 , a back member 174 , and a connecting member 176 .
  • the front member 172 is connected to the back member 174 by the connecting member 176 .
  • the front member 172 is connected to the back member 174 in a state where no gap substantially exists.
  • the hollow head 170 is completed by the connection.
  • the front member 172 has a face surface 178 .
  • the front member 172 has the whole face surface 178 .
  • the front member 172 has a screw hole into which the connecting member 176 is screwed, and a thick part for forming the screw hole.
  • the front member 172 has a hosel part 180 .
  • the hosel part 180 has a shaft hole 182 . Although illustration is omitted, face grooves are formed in the face surface 178 .
  • a back part of the front member 172 has an opening.
  • An extending part 181 capable of supporting an edge part 179 of the back member 174 from an inner side is formed in an edge of the opening.
  • the extending part 181 facilitates position adjustment of the back member 174 to the front member 172 .
  • the back member 174 has a through hole through which the connecting member 176 passes and a thick part for forming the through hole.
  • the connecting member 176 is a screw.
  • the front member 172 is connected to the back member 174 by the connecting member 176 .
  • the head 170 has the adjusting mechanism M 8 .
  • a structure of the adjusting mechanism M 8 is similar to the above-mentioned adjusting mechanism M 1 .
  • the adjusting mechanism M 8 is a screwing mechanism.
  • the adjusting mechanism M 8 can change the back member 174 .
  • a changing back member E 8 is shown with the head 170 in FIG. 24 .
  • a changing back member E 81 and other changing back member E 82 are shown as the changing back member E 8 in FIG. 25 .
  • the changing back member E 81 and the changing back member E 82 can be connected to the front member 172 by the connecting member 176 .
  • a golf club with an adjusting function includes the head 170 and at least one changing back member E 8 .
  • a head shape is changed by changing the back member 174 to the changing back member E 8 .
  • a position of a center of gravity is changed by changing the back member 174 to the changing back member E 8 .
  • a head volume is changed by changing the back member 174 to the changing back member E 8 .
  • a coefficient of restitution of a head to a ball can be varied by changing the back member 174 to the changing back member E 8 .
  • adjustment 8e two or more adjustments selected from a head shape, a head volume, and a position of a center of gravity of a head, and a moment of inertia are changed.
  • a head weight is not varied in the adjusting mechanism MB in respect of maintaining the swing weight.
  • the adjusting mechanism M 8 is applied to the wood type golf club, the adjusting mechanism MB may be used also for other type golf clubs (iron type, utility type, and putter type golf clubs or the like).
  • FIG. 26 shows a vicinity of a grip of a golf club according to other adjusting mechanism.
  • the golf club has a head (not shown), a shaft 190 , and a grip 192 .
  • the head is mounted to one end part of the shaft 190 .
  • the grip 192 is mounted to the other end part of the shaft 190 .
  • the golf club has an adjusting mechanism M 9 .
  • the golf club has other adjusting mechanism independent of the adjusting mechanism M 9 .
  • FIG. 27 is a cross sectional view of FIG. 26 .
  • FIG. 28 is a cross sectional view of a golf club taken along line F 28 -F 28 of FIG. 27 .
  • the shaft 190 is tube-shaped.
  • the inside of the shaft 190 is a cavity.
  • the grip 192 has an inner side grip member 194 and an outer side grip member 196 .
  • the inner side grip member 194 has a cylindrical shaft insertion part 198 . As shown in FIGS. 27 and 28 , the shaft 190 is inserted into the shaft insertion part 198 .
  • the inner side grip member 194 has an end part 200 .
  • An end face 202 of the shaft 190 abuts on the end part 200 .
  • a through hole 203 is formed in a center of the end part 200 .
  • the outer side grip member 196 has a first division body 204 and a second division body 206 .
  • the first division body 204 is semitube-shaped.
  • the second division body 206 is also semitube-shaped.
  • the tubular outer side grip member 196 is formed by the first division body 204 and the second division body 206 .
  • a bump part 210 is formed in an edge of the first division body 204 .
  • a bump part 212 is formed in an edge of the second division body 206 .
  • a shape of the second division body 206 is the same as that of the first division body 204 except for a shape of the bump part.
  • the bump part 210 of the first division body 204 abuts on the bump part 212 of the second division body 206 .
  • the bump part 210 is in mesh with the bump part 212 .
  • the outer side grip member 196 has an overlapping part in which the first division body 204 overlaps the second division body 206 .
  • the bump part 210 and the bump part 212 form the overlapping part in which the first division body 204 overlaps the second division body 206 .
  • a thickness of the outer side grip member 196 is set constant in the whole circumference of the circumferential direction, including the overlapping part. In the outer side grip member 196 , no gap exists in a portion in which the first division body 204 abuts on the second division body 206 .
  • the cylindrical outer side grip member 196 is formed by a combination of the first division body 204 and the second division body 206 .
  • An outer surface 214 of the shaft insertion part 198 is covered with the outer side grip member 196 . At least a part of the outer surface 214 is covered with the outer side grip member 196 . Preferably, the whole outer surface 214 is covered with the outer side grip member 196 .
  • An inner surface 216 of the outer side grip member 196 includes an inner surface 218 of the first division body 204 and an inner surface 220 of the second division body 206 .
  • the inner surface 218 of the first division body 204 is applied to the outer surface 214 of the shaft insertion part 198 .
  • the inner surface 220 of the second division body 206 is also applied to the outer surface 214 of the shaft insertion part 198 .
  • the inner side grip member 194 has a first annular part 222 extending outside in the radial direction from a grip-end side end of the shaft insertion part 198 , and a first cylindrical part 224 extending to a head side from a radial outer side edge of the first annular part 222 .
  • the first annular part 222 is a single annular portion.
  • the first cylindrical part 224 is a single cylindrical portion.
  • a first concave part 226 having the first annular part 222 formed as a bottom is formed by the first annular part 222 and the first cylindrical part 224 .
  • the inner side grip member 194 has a second annular part 228 extending outside in the radial direction from a head side end of the shaft insertion part 198 , and a second cylindrical part 230 extending to a grip end side from a radial outer side edge of the second annular part 228 .
  • the second annular part 228 is a single annular portion.
  • the second cylindrical part 230 is a single cylindrical portion.
  • a second concave part 232 having the second cylindrical part 230 formed as a bottom is formed by the second annular part 228 and the second cylindrical part 230 .
  • the outer side grip member 196 has a grip-end side end 234 .
  • Each of the first division body 204 and the second division body 206 has the grip-end side end 234 .
  • the grip-end side end 234 is inserted into the first concave part 226 .
  • the grip-end side end 234 is covered with the first cylindrical part 224 .
  • the grip-end side end 234 is protected by the first cylindrical part 224 . Since the grip-end side end 234 is not exposed to the outside, the grip-end side end 234 is hardly turned up. Therefore, the first division body 204 and the second division body 206 are hardly peeled off.
  • the outer side grip member 196 has a head side end 236 .
  • Each of the first division body 204 and the second division body 206 has the head side end 236 .
  • the head side end 236 is inserted into the second concave part 232 .
  • the head side end 236 is covered with the second cylindrical part 230 .
  • the head side end 236 is protected by the second cylindrical part 230 . Since the head side end 236 is not exposed to the outside, the head side end 236 is hardly turned up. Therefore, the first division body 204 and the second division body 206 are hardly peeled off.
  • the whole inner side grip member 194 is integrally formed.
  • the first annular part 222 and the first cylindrical part 224 are integrated with the shaft insertion part 198 .
  • the second annular part 228 and the second cylindrical part 230 are integrated with the shaft insertion part 198 .
  • An inner circumferential surface 238 of the inner side grip member 194 is bonded to an outer surface 240 of the shaft 190 by a double-stick tape.
  • the inner side grip member 194 is mounted to the shaft 190 in the same way as a general grip.
  • the inner surface 216 of the outer side grip member 196 is bonded to the outer surface 214 of the shaft insertion part 198 by a double-stick tape.
  • the inner surface 218 of the first division body 204 is bonded to the outer surface 214 by a double-stick tape
  • the inner surface 220 of the second division body 206 is bonded to the outer surface 214 by a double-stick tape.
  • a procedure for applying the outer side grip member 196 to the shaft insertion part 198 of the inner side grip member 194 is as follows:
  • a double-stick tape is applied to the inner surface 218 of the first division body 204 .
  • a double-stick tape is applied to the inner surface 220 of the second division body 206 ;
  • the grip-end side end 234 is inserted into the first concave part 226
  • the head side end 236 is inserted into the second concave part 232 .
  • the grip-end side end 234 is inserted into the first concave part 226 while the first cylindrical part 224 is turned up.
  • the head side end 236 is inserted into the second concave part 232 while the second cylindrical part 230 is turned up.
  • a method for removing the first division body 204 is as follows.
  • the first division body 204 is removed by turning up the first cylindrical part 224 or the second cylindrical part 230 , and pulling the grip-end side end 234 or the head side end 236 .
  • a method for removing the second division body 206 is the same as that of the first division body 204 .
  • the first division body 204 and the second division body 206 are easily removed.
  • the first division body 204 and the second division body 206 are changeable.
  • the adjusting mechanism M 9 is a changing mechanism for the outer side grip member.
  • a position of a center of gravity of the club and a swingweight can be adjusted by changing the outer side grip member to the division bodies 204 and 206 having different weights in relation to each other.
  • a grip weight can be changed without varying a grip outer diameter by changing specific gravity of the division bodies 204 and 206 .
  • An outer diameter of the grip 192 is changed by changing thicknesses of the division bodies 204 and 206 .
  • a material of the inner side grip member 194 is not restricted.
  • the material of the inner side grip member 194 is rubber.
  • the rubber include crude rubber (specific gravity: 0.91 to 0.93), styrene-butadiene rubber (specific gravity: 0.92 to 0.97), EPDM (specific gravity: 0.86 to 0.87), isoprene rubber (0.92 to 0.93), and a mixture thereof.
  • EPDM ethylene-propylene diene rubber
  • SBR styrene-butadiene rubber
  • a material of the outer side grip member 196 is not restricted.
  • the material of the outer side grip member 196 is rubber.
  • the rubber include crude rubber (specific gravity: 0.91 to 0.93), styrene-butadiene rubber (specific gravity: 0.92 to 0.97), EPDM (specific gravity: 0.86 to 0.87), isoprene rubber (0.92 to 0.93), and a mixture thereof.
  • crude rubber specifically gravity: 0.91 to 0.93
  • styrene-butadiene rubber specifically gravity: 0.92 to 0.97
  • EPDM specific gravity: 0.86 to 0.87
  • isoprene rubber (0.92 to 0.93
  • ethylene-propylene diene rubber EPDM
  • SBR styrene-butadiene rubber
  • rubber blended with a metal powder having specific gravity equal to or greater than 10 is preferable, and rubber blended with a metal powder having specific gravity equal to or greater than 15 is more preferable.
  • the metal powder include a tungsten alloy powder.
  • FIG. 29 shows a vicinity of a grip end of a golf club provided with an adjusting mechanism M 10 according to other embodiment.
  • the golf club has a head (not shown), a shaft 250 , and a grip 252 .
  • the head is mounted to one end part of the shaft 250 .
  • the grip 252 is mounted to the other end part of the shaft 250 .
  • the golf club is further provided with other adjusting mechanism independent of the adjusting mechanism M 10 .
  • FIG. 30 is a cross sectional view of FIG. 29 .
  • FIG. 31 is an exploded view of FIG. 29 .
  • the grip 252 has a grip body 252 a and two extending members 252 b .
  • the two extending members 252 b are mounted to a back end of the grip body 252 a.
  • the grip body 252 a is fixed to a back end part of the shaft 250 by a double-stick tape.
  • a bonding method using the double-stick tape is the same as a usual grip bonding method.
  • the first extending member 252 b is mounted to the back end of the grip body 252 a .
  • the second extending member 252 b is mounted to a back end of the first extending member 252 b.
  • An outer surface 252 a 1 of the grip body 252 a is substantially steplessly connected to an outer surface 252 b 1 of the extending member 252 b . Furthermore, the outer surfaces 252 b 1 of the extending members 252 b are substantially steplessly connected to each other.
  • a grasping surface 252 m is formed by the outer surface 252 a 1 and the two outer surfaces 252 b 1 .
  • the grip body 252 a has a rubber part g 3 and a hard base h 3 .
  • a material of the rubber part g 3 is rubber.
  • the hard base h 3 is provided medially in the rubber part g 3 .
  • the hard base h 3 is covered with the rubber part g 3 .
  • the outer surface 252 a 1 of the grip body 252 a is an outer surface of the rubber part g 3 .
  • the hard base h 3 has a screw hole sc 3 .
  • the hard base h 3 has a cylinder part h 31 and a bottom face part h 32 .
  • An inner surface of the cylinder part h 31 is the screw hole sc 3 .
  • the screw hole sc 3 is opened upward.
  • the hard base h 3 is fixed to the rubber part g 3 .
  • the fixing method is not restricted, and for example, is bonding using an adhesive.
  • the first extending member 252 b is located between the grip body 252 a and the second extending member 252 b .
  • the first extending member 252 b has a rubber part g 4 and a hard connector h 4 .
  • a material of the rubber part g 4 is rubber.
  • An upper part of the hard connector h 4 is covered with the rubber part g 4 .
  • the hard connector h 4 is provided medially in the rubber part g 4 .
  • the outer surface 252 b 1 of the extending member 252 b is an cuter surface of the rubber part g 4 .
  • the hard connector h 4 has a cylindrical part h 41 and a columnar part h 42 (see FIG. 30 ).
  • An inner surface of the cylindrical part h 41 is a screw hole sc 4 (female screw).
  • An outer surface of the columnar part h 42 is a male screw.
  • the cylindrical part h 41 is disposed coaxially with the columnar part h 42 .
  • the columnar part h 42 has an exposed part ex 2 exposed from the rubber part g 4 (see FIG. 31 ). At least a part of the columnar part h 42 is the exposed part ex 2 .
  • the exposed part ex 2 protrudes downward.
  • the columnar part h 42 (male screw) is screwed into the screw hole sc 3 (female screw) of the grip body 252 a for connection between the first extending member 252 b and the grip body 252 a .
  • the columnar part h 42 of the second extending member 252 b is screwed into the screw hole sc 4 of the first extending member 252 b for connection between the extending members 252 b.
  • the screw hole sc 3 is similar to the screw hole sc 4 .
  • An axial length of the exposed part ex 2 is shorter than that of the screw hole sc 3 . Therefore, a clearance K 1 exists between the bottom face part h 32 and the columnar part h 42 in a state where the grip body 252 a is connected to the extending member 252 b (see FIG. 30 ).
  • the clearance K 1 prevents a gap from occurring in a boundary between the outer surface 252 a 1 of the grip body 252 a and the outer surface 252 b 1 of the extending member 252 b.
  • the axial length of the exposed part ex 2 is shorter than that of the screw hole sc 4 . Therefore, a clearance K 2 exists between an end face of the columnar part h 42 and a bottom surface of the cylindrical part h 41 in a state where the extending members 252 b are connected to each other (see FIG. 30 ).
  • the clearance K 2 prevents a gap from occurring in a boundary between the outer surfaces 252 b 1 of the extending members 252 b.
  • the second extending member 252 b is located on a grip back end side rather than the first extending member 252 b .
  • the second extending member 252 b is a back most extending member 252 b.
  • the second extending member 252 b is the same as the above-mentioned first extending member 252 b . Therefore, the description of the second extending member 252 b is omitted.
  • the grip body 252 a can be joined to the extending member 252 b by screw connection. Furthermore, the extending members 252 b can be joined to each other by screw connection.
  • the extending member 252 b is detachably mounted.
  • the extending member 252 b is removed by rotating the extending member 252 b and releasing the screw connection.
  • a grip length can be adjusted by mounting/demounting the extending member 252 b.
  • the grip length can be further changed by changing the number of the extending members 252 b .
  • the grip length can be shortened when the number of the extending members 252 b is 0.
  • the number of the extending members 252 b may be 1.
  • the number of the extending members 252 b may be equal to or greater than 3. Since a joining structure of the extending members 252 b is the same, the number of the extending members 252 b to be joined can be freely selected.
  • the adjusting mechanism M 10 is a grip length adjusting mechanism.
  • the adjusting mechanism M 10 is also a club length adjusting mechanism.
  • FIG. 32 is an exploded view of a grip 260 according to other embodiment using the adjusting mechanism M 10 .
  • the grip 260 has a grip body 252 a , an extending member 252 b , and an extending member 260 b .
  • the grip body 252 a is used for the above-mentioned grip 252 .
  • the extending member 252 b is also used for the above-mentioned grip 252 .
  • the extending member 260 b has a rubber part g 5 and a hard connector h 4 .
  • the hard connector h 4 of the extending member 260 b is the same as that of the above-mentioned extending member 252 b .
  • a difference between the extending member 252 b and the extending member 260 b is only a length of the rubber part.
  • a length of a rubber part g 4 of the extending member 252 b is shown by a double pointed arrow L 1 in FIG. 32 .
  • a length of a rubber part g 5 of the extending member 260 b is shown by a double pointed arrow L 2 in FIG. 32 .
  • the length L 1 is different from the length L 2 .
  • a length of the grip 260 can be adjusted by selecting any one of the extending members 252 b and 260 b.
  • a material of the hard base is harder than that of a grip grasping surface. Certainty of the connection and rigidity of the inner part of the grip can be improved by using the hard base.
  • a material of the hard base is preferably a metal or a resin, and more preferably the metal.
  • the resin include a thermoplastic resin and a carbon fiber reinforced resin. In respect of processability, preferable examples of the resin include nylon, polyether block amide copolymer (PEBAX), and polycarbonate.
  • the metal include stainless steel, an aluminium alloy, and a titanium alloy. In respect of a swingweight, a high specific gravity metal (specific gravity: equal to or greater than 12) such as tungsten and a tungsten alloy can be also used.
  • a material of the hard connector is harder than that of a grip grasping surface. Certainty of the connection and rigidity of the inner part of the grip can be improved by using the hard connector.
  • a material of the hard connector is preferably a metal or a resin, and more preferably the metal.
  • the resin include a thermoplastic resin and a carbon fiber reinforced resin. In respect of processability, preferable examples of the resin include nylon, polyether block amide copolymer (PEBAX), and polycarbonate.
  • the metal include stainless steel, an aluminium alloy, and a titanium alloy. In respect of a swingweight, a high specific gravity metal (specific gravity: equal to or greater than 12) such as tungsten and a tungsten alloy can be also used.
  • the rubber which is a material of the rubber part is not restricted.
  • the rubber is preferably a rubber elastic body made of vulcanized rubber or the like. It should be understood that a thermoplastic elastomer is also included in the rubber. In respect of low slidability or the like, crude rubber (specific gravity: 0.91 to 0.93), styrene-butadiene rubber (specific gravity: 0.92 to 0.97), EPDM (specific gravity: 0.86 to 0.87), isoprene rubber (specific gravity: 0.92 to 0.93), and a mixture thereof are preferable.
  • Examples of specifications capable of being adjusted by the adjusting mechanism M 10 include a club length, a position of a center of gravity of a club, a frequency of the club, a moment of inertia of the club, a grip weight, a position of a center of gravity of a grip, and a grip length.
  • the club length is extended by mounting the extending member.
  • the extension of the club length increases the swingweight.
  • an effect of so-called counter balance is caused by mounting the extending member.
  • the counter balance decreases the swingweight.
  • the setoff of both the club length and the swingweight can be promoted by setting a weight and length of the extending member. The promotion can suppress increase of the swingweight while increasing the club length. Furthermore, variation of the swingweight can be substantially eliminated while increasing the club length.
  • the term “is not substantially varied” means an amount of variation of less than 10%.
  • the term “is not substantially varied” for the swingweight means variation equal to or less than ⁇ 1 point.
  • the swingweight is a 14 inch form.
  • the swingweight is also referred to as swing balance.
  • FIG. 33 is an exploded perspective view of a head 268 .
  • FIG. 34 is a view of the head 268 , as viewed from a crown side.
  • the head 268 is provided with an adjusting mechanism M 11 in addition to the above-mentioned adjusting mechanism M 1 .
  • a golf club provided with the head 268 is provided with the head 268 , a shaft, and a grip.
  • the head 268 is a wood type golf club head.
  • the adjusting mechanism M 1 is used as a loft angle adjusting mechanism.
  • the adjusting mechanism M 11 is used as a face angle adjusting mechanism.
  • a constitution of the head 268 is the same as that of the above-mentioned head 2 except for existence of the adjusting intermediate member 270 .
  • the same portions of the head 268 as those of the head 2 are designated by the same reference numerals as those of the head 2 , and the repeated description is omitted.
  • the adjusting mechanism M 11 has the adjusting intermediate member 270 and a changing adjusting intermediate member (not shown).
  • the adjusting intermediate member 270 is disposed between the front member 4 and the back member 6 .
  • the front member 4 , the adjusting intermediate member 270 , and the back member 6 are connected to each other in a state where no gap substantially exists.
  • the adjusting intermediate member 270 is fixed with the adjusting intermediate member 270 sandwiched between the front member 4 and the back member 6 .
  • the fixation is achieved by screw connection of the connecting member 8 .
  • the adjusting intermediate member 270 is a ring-shaped member.
  • the adjusting intermediate member 270 has a protruding part 272 (see FIG. 33 ).
  • the protruding part 272 protrudes toward the front member 4 .
  • the protruding part 272 facilitates position adjustment of the adjusting intermediate member 270 and the front member 4 .
  • a face angle can be adjusted by varying a plane shape (see FIG. 34 ) of the adjusting intermediate member 270 .
  • the face angle can be adjusted by changing the adjusting intermediate member 270 to other adjusting intermediate member which is not shown.
  • the head 268 has the plurality of (two) adjusting mechanisms M 1 and M 11 .
  • the plurality of adjusting mechanisms M 1 and M 11 can be adjusted independently of each other.
  • the loft angle and the face angle can be adjusted independently of each other.
  • Examples of specifications capable of being adjusted by the adjusting mechanism M 11 include a face angle and a loft angle.
  • the face angle and the loft angle can be adjusted by only the adjusting mechanism M 11 without using the adjusting mechanism M 1 .
  • FIG. 35 is an exploded perspective view of a head 280 provided with an adjusting mechanism M 12 .
  • a golf club provided with the head 280 is provided with the head 280 , a shaft, and a grip.
  • the head 280 is a wood type golf club head.
  • the head 280 has a front member 282 , a back member 284 , and a connecting member 8 .
  • the front member 282 is connected to the back member 284 by the connecting member 8 .
  • the front member 282 is connected to the back member 284 in a state where no gap substantially exists.
  • the front member 282 has a face surface 286 .
  • the front member 282 has the whole face surface 286 .
  • the front member 282 has a screw hole into which the connecting member 8 is screwed.
  • the front member 282 further has a thick part 288 for forming the screw hole. Two thick parts 288 are provided at two positions.
  • the front member 282 has a plate-shaped face part 285 , an upper side backward extending part 287 , and a lower side backward extending part 289 . Both the two thick parts 288 are provided in the lower side backward extending part 289 .
  • the front member 282 may not have the upper side backward extending part 287 and the lower side backward extending part 289 . That is, the whole front member 282 may be plate-shaped. In this case, the thick part 288 can be eliminated. In this case, the screw hole can be formed in the plate-shaped front member 282 .
  • the back member 284 has a hosel part 290 .
  • the hosel part 290 has a shaft hole 292 .
  • the back member 284 has a through hole 294 through which the connecting member 8 passes and a thick part 296 for forming the through hole 294 .
  • the thick part 296 is formed on each of the toe side and heel side of a sole of the head 280 .
  • the back member 284 has a protruding part 298 .
  • a plurality of (two) protruding parts 298 are provided.
  • the protruding parts 298 protrude forward from an opening part of the back member 284 .
  • the protruding parts 298 facilitate position adjustment of the front member 282 .
  • the protruding parts 298 facilitate screwing between the front member 282 and the back member 284 .
  • the connecting member 8 is a screw.
  • the front member 282 is connected to the back member 284 by the connecting member 8 .
  • the protruding parts 298 improve certainty of the connection.
  • the head 2 has the adjusting mechanism M 12 .
  • the adjusting mechanism M 12 is similar to the above-mentioned adjusting mechanism M 1 .
  • a main difference between the adjusting mechanism M 12 and the adjusting mechanism M 1 is a shape of the front member.
  • the front member 282 has a shape formed by cutting a toe portion and heel portion of the above-mentioned front member 4 (see FIG. 2 ).
  • the front member 282 does not close the whole opening part of the back member 284 .
  • a hollow part of the head 280 is opened to the outside on the toe side of the front member 282 .
  • the hollow part of the head 280 is opened to the outside on the heel side of the front member 282 .
  • the adjusting mechanism M 12 can change the front member 282 .
  • a loft angle real loft angle
  • a face angle is changed by changing the front member 282 .
  • Examples of specifications capable of being adjusted by the adjusting mechanism M 12 include a loft angle, a face angle, a face area, and a face progression. Each of these specifications can be independently adjusted by the adjusting mechanism M 12 . Furthermore, a coefficient of restitution of the head to a ball, and a friction coefficient of the head to the ball can be adjusted by the adjusting mechanism M 12 . The coefficient of restitution of the head to the ball can be adjusted by, for example, changing the front member to a changing front member having rigidity different from that of the front member. The friction coefficient of the head to the ball can be adjusted by, for example, changing the front member to a changing front member having a face surface having surface roughness different from that of the front member.
  • a shape of the front member is simplified as compared with the above-mentioned adjusting mechanism M 1 .
  • a mold for the front member can be manufactured at low cost by the simplification. The simplification of the shape reduces a manufacture cost of the front member.
  • the adjusting mechanism M 12 may be used also for other type golf clubs (iron type, utility type, and putter type golf clubs or the like).
  • FIG. 37 is a view of a golf club 310 having an adjusting mechanism M 13 , as viewed from a sole side.
  • the club 310 has a head 312 .
  • the adjusting mechanism M 13 is a modification example of the above-mentioned adjusting mechanism M 4 .
  • the adjusting mechanism M 13 can adjust a real loft angle in addition to a lie angle. Although the number of positions of the shaft axis line capable of being selected is 3 in the above-mentioned adjusting mechanism M 4 , the number of positions of the shaft axis line capable of being selected is 5 in the adjusting mechanism M 13 .
  • a reference shaft axis line is represented by reference character LS 1 (see FIG. 37 ).
  • a second shaft axis line is represented by reference character LF 1 .
  • a third shaft axis line is represented by reference character LU 1 .
  • a fourth shaft axis line is represented by reference character LP 1 .
  • a fifth shaft axis line is represented by reference character LM 1 .
  • the head 312 has five holding holes h 1 .
  • the head 312 has a first holding hole h 11 , a second holding hole h 12 , a third holding hole h 13 , a fourth holding hole h 14 , and a fifth holding hole h 15 .
  • a constitution of the golf club 310 is the same as that of the above-mentioned adjusting mechanism M 4 (golf club 70 ) except that the five holding holes h 1 are formed; a space is secured so that the positions of the five kinds of shaft axis lines are allowed; and five kinds of sleeve supporting members 80 (described above) are provided.
  • the lie angle can be adjusted to three kinds by the adjusting mechanism M 13 .
  • the three kinds of lie angles are achieved by the reference shaft axis line LS 1 , the second shaft axis line LF 1 , and the third shaft axis line LU 1 .
  • the real loft angle can be adjusted to three kinds.
  • the three kinds of real loft angles are achieved by the reference shaft axis line LS 1 , the fourth shaft axis line LP 1 , and the fifth shaft axis line LM 1 .
  • the real loft angle is increased in the fourth shaft axis line LP 1 as compared with the reference shaft axis line LS 1 .
  • the real loft angle is decreased in the fifth shaft axis line LM 1 as compared with the reference shaft axis line LS 1 .
  • FIG. 38 is a perspective view of a head 320 having an adjusting mechanism M 14 .
  • FIG. 39 is an exploded perspective view of the head 320 .
  • FIG. 40 is a cross sectional view of the head 320 .
  • the head 320 has a front member 322 and a back member 324 .
  • the back member 324 has an engagement protruding part 326 .
  • the engagement protruding part 326 has an engaging groove 328 and an inclined surface 330 (see an enlarged part of FIG. 40 ).
  • the engagement protruding part 326 is formed in each of crown part and a sole part of the head 320 (see FIG. 40 ).
  • the front member 322 has an inner extending part 332 .
  • the inner extending part 332 is fitted into a groove 328 of the engagement protruding part 326 .
  • the front member 322 is connected to the back member 324 by engagement between the engagement protruding part 326 and the inner extending part 332 .
  • the outer surface of the front member 322 is almost smoothly continuous with the outer surface of the back member 324 .
  • the front member 322 is detachably mounted to the back member 324 .
  • the engagement protruding part 326 of the back member 324 is press fitted into an opening part of the front member 322 .
  • a tip of the inner extending part 332 can slide on a surface of the inclined surface 330 . The sliding can facilitate the press fitting.
  • the crown part and sole part of the back member 324 are compressed toward the inner side of the head in the case of press fitting if needed.
  • the crown part and sole part of the back member 324 are compressed toward the inner side of the head, to release engagement between the engaging groove 328 and the inner extending part 332 .
  • the front member 322 can be removed from the back member 324 by the release.
  • the adjusting mechanism M 14 can change the back member 324 .
  • Plastic deformation of the back member 324 is required for mounting/demounting.
  • a material of the back member 324 may be fiber-reinforced plastic.
  • a position of a center of gravity is changed by changing the back member 324 .
  • a head volume is changed by changing the back member 324 .
  • adjustment 14e two or more selected from a head shape, a head volume, a position of a center of gravity of a head, and a moment of inertia are changed.
  • a head weight is not varied in the adjusting mechanism M 14 in respect of maintaining a swingweight.
  • the adjusting mechanism M 14 may be used also for other type golf clubs (iron type, utility type, and putter type golf clubs or the like).
  • FIG. 41 is a plan view of a head 340 having an adjusting mechanism M 15 .
  • FIG. 42 is a cross sectional view taken along line F 42 -F 42 of FIG. 41 .
  • FIG. 43 is a bottom view of the head 340 .
  • the head 340 has a front member 342 , a back member 344 , and a spacer 346 .
  • a crown part of the front member 342 is rotatably joined to a crown part of the back member 344 .
  • a hinge 348 is used for the joining.
  • the spacer 346 is interposed between the front member 342 and the back member 344 .
  • the spacer 346 is located in the head 340 .
  • a bottom surface of the spacer 346 is exposed to the outside.
  • the bottom surface of the spacer 346 constitutes a part of a sole surface of the head 340 .
  • the hinge 348 allows rotation of the front member 342 to the back member 344 .
  • the rotation can adjust a real loft angle.
  • the rotation is fixed.
  • the fixation is achieved by a screw member 350 .
  • the screw member 350 passes through the spacer 346 , and connects the front member 342 to the back member 344 .
  • a groove 352 opened downward and a protruding part 354 extending downward are formed in an edge of a lower end of the front member 342 (a lower end of a face part). Similarly, a groove 352 opened downward and a protruding part 354 extending downward are formed in an edge of a front end of a sole part of the back member 344 .
  • a groove 356 opened upward and a protruding part 358 extending upward are formed in a front edge of a lower surface of the spacer 346 . Similarly, a groove 356 opened upward and a protruding part 358 extending upward are formed in a back edge of the lower surface of the spacer 346 .
  • the protruding part 354 is fitted into the groove 356 in the back edge of the lower surface of the spacer 346 , and the protruding part 358 is fitted into the groove 352 .
  • the protruding part 354 is fitted into the groove 356 also in the front edge of the lower surface of the spacer 346 , and the protruding part 358 is fitted into the groove 352 . Fixation of the spacer 346 is achieved by these fittings.
  • a real loft angle can be varied by a thickness and shape of the spacer 346 .
  • the real loft angle can be adjusted by changing the spacer 346 .
  • the specification capable of being adjusted is not restricted.
  • Examples of the specification include a loft angle, a lie angle, a face angle, a face area, a position of a center of gravity of a head, a swingweight, a club length, a position of a center of gravity of a club, a frequency of the club, a club weight, a head shape, a head volume, a head weight, a flex of a shaft (shaft hardness), a flex point of a shaft, a torque of the shaft, flexural rigidity distribution of the shaft, torsional rigidity distribution of the shaft, a shaft weight, weight distribution of the shaft, a position of a center of gravity of the shaft, a length of the shaft, a grip outer diameter, a grip weight, a position of a center of gravity of a grip, a grip length, a specification of a face groove, a face progression, a moment of inertia of the head, a moment of inertia of the head,
  • At least two specifications can be adjusted independently of each other. More preferably, all the specifications capable of being adjusted can be adjusted independently of each other.
  • the specification includes a specification according to the head, a specification according to the shaft, a specification according to the grip, and a specification according to the whole club.
  • Examples of the specification according to the head include a loft angle, a lie angle, a face angle, a face area, a position of a center of gravity of a head, a head shape, a head volume, a head weight, a face progression, a moment of inertia of the head, a coefficient of restitution of the head to a ball, and a friction coefficient of the head to the ball.
  • Examples of the position of the center of gravity of the head include a distance of a center of gravity (a distance between a shaft axis line and a center of gravity of the head), a depth of the center of gravity, and a sweet spot height besides an actual (three-dimensional) position of a center of gravity of the head.
  • Examples of the specification according to the shaft in the specifications include a flex of a shaft, a flex point of a shaft, a torque of the shaft, flexural rigidity distribution of the shaft, torsional rigidity distribution of the shaft, a shaft weight, weight distribution of the shaft, a position of a center of gravity of the shaft, and a length of the shaft.
  • Examples of the specification according to the grip in the specifications include a grip outer diameter, a grip weight, a position of a center of gravity of a grip, and a grip length.
  • Examples of the specification according to the whole club in the specifications include a swingweight, a club length, a position of a center of gravity of a club, a frequency of the club, a club weight, and a moment of inertia of the club.
  • an adjustment range of the specification is not restricted. In respect of a degree of freedom of adjustment, the adjustment range is preferably wider.
  • the adjustment range of the loft angle is preferably equal to or greater than 2 degrees, preferably equal to or greater than 3 degrees, and still more preferably equal to or greater than 4 degrees.
  • the adjustment range of the face angle is preferably equal to or greater than 2 degrees, more preferably equal to or greater than 3 degrees, and still more preferably equal to or greater than 4 degrees.
  • the adjustment range of the lie angle is preferably equal to or greater than 1 degree, more preferably equal to or greater than 2 degrees, and still more preferably equal to or greater than 3 degrees.
  • the adjustment range of the distance of a center of gravity is preferably equal to or greater than 5 mm, more preferably equal to or greater than 10 mm, and still more preferably equal to or greater than 15 mm.
  • the adjustment range of the club length is preferably equal to or greater than 1 inch, more preferably equal to or greater than 1.5 inches, and still more preferably equal to or greater than 2 inches.
  • the adjustment range of the head volume is preferably equal to or greater than 10 cc, more preferably equal to or greater than 20 cc, and still more preferably equal to or greater than 30 cc.
  • the adjustment range of the grip outer diameter is preferably equal to or greater than 0.5 mm, more preferably equal to or greater than 1 mm, and still more preferably equal to or greater than 1.5 mm.
  • the adjustment range of the swingweight is preferably equal to or greater than 1 point, more preferably equal to or greater than 2 points, and still more preferably equal to or greater than 3 points.
  • an adjustment range in a specific specification is preferably equal to or greater than a range corresponding to two-number clubs.
  • the range corresponding to two-number clubs is as follows.
  • the specific specification is one or more selected from a loft angle, a lie angle, a club length, and a club weight.
  • the golf club of the present invention has one or more adjusting mechanisms.
  • the adjusting mechanism is not restricted.
  • the adjusting mechanism can adjust the specification.
  • One adjusting mechanism can adjust one or more specifications.
  • One adjusting mechanism may be able to adjust two or more specifications. Two or more specifications adjusted by one adjusting mechanism may be adjusted so as to be interlocked with each other, and may be independently adjusted without being interlocked with each other.
  • the golf club has a plurality of adjusting mechanisms.
  • two or more specifications can be adjusted independently of each other by the plurality of adjusting mechanisms.
  • the adjusting mechanism can adjust the specification according to the head without changing the whole head.
  • the adjusting mechanism can adjust the specification according to the grip without changing the whole grip.
  • the adjusting mechanism can adjust the specification according to the shaft without changing the whole shaft.
  • Examples of the adjusting mechanism include the adjusting mechanism M 1 , the adjusting mechanism M 2 , the adjusting mechanism M 3 , the adjusting mechanism M 4 , the adjusting mechanism M 5 , the adjusting mechanism M 6 , the adjusting mechanism M 7 , the adjusting mechanism M 8 , the adjusting mechanism M 9 , the adjusting mechanism M 10 , the adjusting mechanism M 11 , the adjusting mechanism M 12 , the adjusting mechanism M 13 , the adjusting mechanism M 14 , and the adjusting mechanism M 15 .
  • the adjusting mechanisms described in the above-mentioned Patent Documents can be also applied to the present invention.
  • Examples of the golf club provided with a plurality of adjusting mechanisms include a golf club provided with two or more adjusting mechanisms selected from the adjusting mechanism M 1 , the adjusting mechanism M 2 , the adjusting mechanism M 3 , the adjusting mechanism M 4 , the adjusting mechanism M 5 , the adjusting mechanism M 6 , the adjusting mechanism M 7 , the adjusting mechanism M 8 , the adjusting mechanism M 9 , the adjusting mechanism M 10 , the adjusting mechanism M 11 , the adjusting mechanism M 12 , the adjusting mechanism M 13 , the adjusting mechanism M 14 , and the adjusting mechanism M 15 .
  • the adjusting mechanisms described in the embodiment can be independent from each other. That is, when the plurality of adjusting mechanisms is provided in a single golf club, the plurality of adjusting mechanisms can function without being interlocked with each other. The independence between the adjusting mechanisms improves the degree of freedom of adjustment.
  • Two or more adjusting mechanisms selected from the above-mentioned adjusting mechanisms M 1 to M 15 can be set in a single golf club.
  • the two or more adjusting mechanisms can be set in the single golf club within the technical level of a person skilled in the art except that it is particularly difficult to provide the two or more adjusting mechanisms.
  • the head may have a plurality of adjusting mechanisms. In this case, the degree of freedom of adjustment of the specification according to the head is improved.
  • the shaft may have a plurality of adjusting mechanisms. In this case, a degree of freedom of adjustment of the specification according to the shaft is improved.
  • the grip may have a plurality of adjusting mechanisms. In this case, a degree of freedom of adjustment of the specification according to the grip is improved.
  • the specification adjusted by one adjusting mechanism and the specification adjusted by other adjusting mechanism can be adjusted independently of each other.
  • the independence between the specifications improves the degree of freedom of adjustability.
  • the plurality of specifications may be adjusted independently of each other.
  • the face angle and the loft angle can be independently adjusted in the adjusting mechanism M 1 . That is, in setting a direction of the face surface of the front member 4 , the loft angle can be also varied without varying the face angle, and the face angle can be also varied without varying the loft angle. In addition, the loft angle and the face angle can be also varied independently of each other.
  • the plurality of adjusting mechanisms is provided.
  • at least two of the adjusting mechanisms can be preferably adjusted independently of each other.
  • a first adjusting mechanism and a second adjusting mechanism can be preferably adjusted independently of each other, and the first adjusting mechanism, the second adjusting mechanism, and a third adjusting mechanism can be preferably adjusted independently of each other. That is, when the two or more adjusting mechanisms are provided, all the adjusting mechanisms can be most preferably adjusted independently of each other.
  • the loft angle, the lie angle, and the face angle are varied in relation to each other due to the circumferential position of the sleeve.
  • the three specifications cannot be adjusted independently of each other.
  • the non-independence reduces the degree of freedom of adjustability.
  • the present invention can solve the problem.
  • a material of the head is not restricted.
  • Preferable examples of the material include a titanium alloy, stainless steel, an aluminium alloy, a magnesium alloy, carbon fiber reinforced plastic (CFRP), and a combination thereof.
  • a manufacturing method of the head is not restricted, and examples thereof include forging, casting, pressing, and a combination thereof.
  • the head may be made of a plurality of combined materials.
  • a structure of the head body is not restricted.
  • a material of the shaft is not restricted.
  • Examples of the material of the shaft include carbon fiber reinforced plastic (CFRP) and a metal.
  • CFRP carbon fiber reinforced plastic
  • a so-called carbon shaft and steel shaft can be suitably used.
  • a structure of the shaft is not restricted.
  • a material of the sleeve is not restricted.
  • the material include a titanium alloy, stainless steel, an aluminium alloy, a magnesium alloy, and a resin. It is preferable that the resin has excellent mechanical strength.
  • the resin is preferably a resin referred to as an engineering plastic or a super-engineering plastic.
  • the engaging member may be integrally formed with the head body. In respect of a balance between strength and lightweight, for example, the aluminium alloy and the titanium alloy are more suitable.
  • a material of the engaging member is not restricted.
  • the material include a titanium alloy, stainless steel, an aluminium alloy, a magnesium alloy, and a resin. It is preferable that the resin has excellent mechanical strength.
  • the resin is preferably a resin referred to as an engineering plastic or a super-engineering plastic.
  • the engaging member may be integrally formed with the head body.
  • a material of the connecting member is not restricted.
  • the material include a titanium alloy, stainless steel, an aluminium alloy, and a magnesium alloy.
  • a material of the sleeve supporting member 80 is not restricted.
  • the material include a titanium alloy, stainless steel, an aluminium alloy, and a magnesium alloy besides the above-mentioned resin.
  • the specifications can be measured by known measuring devices. Examples of the measuring devices for the loft angle, the lie angle, and the face angle include a golf club head gauge manufactured by Sheng Feng Iron Enterprise Co. Some typical specifications may be described in a product catalog.
  • a combination of the specifications capable of being adjusted is not restricted.
  • the number of the specifications capable of being adjusted is not restricted. The number is preferably equal to or greater than 3, and more preferably equal to or greater than 4.
  • a golf club A having the adjusting mechanism capable of adjusting the loft angle and the adjusting mechanism capable of adjusting the distance of a center of gravity is effective in a situation where a mistake of pulling a ball using a short iron is apt to occur, for example.
  • the mistake can be resolved by increasing the loft angle and lengthening the distance of a center of gravity.
  • the golf club A is effective in a situation where a mistake of opening a face of the short iron is apt to occur, for example.
  • the mistake can be resolved by increasing the loft angle and shortening the distance of a center of gravity.
  • adjustment for decreasing the loft angle and increasing the distance of a center of gravity is effective.
  • a golf club B having the adjusting mechanism capable of adjusting the loft angle and the adjusting mechanism capable of adjusting the club length is effective in increasing a flight distance.
  • An example of effective adjustment in this case is adjustment for lengthening the club length to increase the head speed and increasing the loft angle to increase a launch angle.
  • the golf club B is effective in improving controllability.
  • An example of effective adjustment in this case is adjustment for shortening the club length to decrease the flight distance and increasing the loft angle to increase the launch angle. In this case, a ball having a high trajectory to tend to stop at a fall spot can be achieved. Since adjustment for decreasing the loft angle and lengthening the club length can achieve a low launch angle and improvement in the head speed, the adjustment is effective in improving the total flight distance including a run. Since adjustment decreasing the loft angle and shortening the club length can achieve a low launch angle and decrease in the head speed, the adjustment is effective when the run is desired to be increased by a low hit ball.
  • a golf club C having the adjusting mechanism capable of adjusting the loft angle and the adjusting mechanism capable of adjusting the swingweight is effective in improving controllability.
  • the swingweight is increased to stabilize a swing, and the loft angle is increased to increase the launch angle.
  • the swingweight is decreased to increase the head speed, and the loft angle is increased to increase the launch angle.
  • a ball having a high trajectory to tend to stop at a fall spot can be achieved.
  • adjustment for decreasing the loft angle and increasing the swing balance can achieve a low launch angle and a stable (slow) swing, the adjustment is effective in obtaining a low trajectory having excellent directivity. Since adjustment for decreasing the loft angle and decreasing the swing balance can achieve a low launch angle and improvement in a head speed, it is effective in increasing a run by a low trajectory to increase the total flight distance.
  • the hosel part has a light weight. In respect of strength of the hosel part and reduction in a weight of the hosel part, the following constitution (a) is preferable; the following constitution (b) is more preferable; and the following constitution (c) is still more preferable:
  • the adjusting mechanisms M 3 , M 4 , M 7 , and M 13 are located in the hosel part in the embodiments.
  • the adjusting mechanisms M 1 , M 2 , M 5 , M 6 , M 8 , M 9 , M 10 , M 11 , M 12 , M 14 , and M 15 are located at places other than the hosel part.
  • Examples in which the adjusting mechanism located at a place other than the hosel part is combined with the adjusting mechanism located in the hosel part include examples 2 to 11 to be described later. Examples in which the adjusting mechanisms located at places other than the hosel part are combined with each other include examples 1 and 12 to 28 to be described later.
  • constitutions (a) include the following constitutions (a1) to (a5):
  • the adjusting mechanism ( 1 ) or the adjusting mechanism ( 2 ) is located in the sole of the head;
  • the adjusting mechanism ( 1 ) or the adjusting mechanism ( 2 ) is located in the head other than the hosel part.
  • the other of the adjusting mechanism ( 1 ) or the adjusting mechanism ( 2 ) may be located in the hosel part in each of the constitutions (a1), (a2), (a3), (a4), and (a5).
  • constitutions (b) include the following constitutions (b1) to (b8):
  • the adjusting mechanism ( 1 ) is located in the shaft, and the adjusting mechanism ( 2 ) is located in the head other than the hosel part;
  • the adjusting mechanism ( 1 ) is located in the grip, and the adjusting mechanism ( 2 ) is located in the sole of the head.
  • the adjusting mechanism M 1 is located in the head other than the hosel part.
  • the adjusting mechanism M 2 is located in the head other than the hosel part.
  • the adjusting mechanism M 3 is located in the hosel part.
  • the adjusting mechanism M 4 is located in the hosel part.
  • the adjusting mechanism M 5 is located in the head other than the hosel part, and is located in the sole of the head.
  • the adjusting mechanism M 6 is located in the grip, and is located in the shaft.
  • the adjusting mechanism M 7 is located in the hosel part.
  • the adjusting mechanism M 8 is located in the head other than the hosel part.
  • the adjusting mechanism M 9 is located in the grip.
  • the adjusting mechanism M 10 is located in the grip.
  • the adjusting mechanism M 11 is located in the head other than the hosel part.
  • the adjusting mechanism M 12 is located in the head other than the hosel part.
  • the adjusting mechanism M 13 is located in the hosel part.
  • the adjusting mechanism M 14 is located in the head other than the hosel part.
  • the adjusting mechanism M 15 is located in the head other than the hosel part.
  • the adjusting mechanism ( 1 ) and the adjusting mechanism ( 2 ) do not interfere with each other.
  • the meaning of the term “interfere” is as follows.
  • the adjusting mechanisms A and B are defined to interfere with each other.
  • the adjusting mechanisms A and B are defined to interfere with each other.
  • the interference is a case where a screw for fixing the adjusting mechanism A contributes also to fixation of the adjusting mechanism B, for example.
  • the specification of the shaft can be adjusted by changing the shaft. However, a cost of the shaft is high. Golf players request desired adjustment of other specifications without changing the shaft preferred by the golf players themselves. In these respects, it is preferable that the adjusting mechanism ( 1 ) and the adjusting mechanism ( 2 ) involve no shaft change. It is more preferable that all the adjusting mechanisms involve no shaft change.
  • a sleeve is preferably used in a golf club having a changeable shaft.
  • the sleeve is used in the adjusting mechanisms M 4 and M 7 , for example.
  • the sleeve is typically bonded to the shaft.
  • the shaft is detachably mounted to the head by using the sleeve, to facilitate the change of the shaft.
  • a large impact force from hitting acts on the sleeve.
  • it is preferable that the sleeve is supported by surface contact in the whole circumferential direction (360 degrees).
  • the sleeve is supported by the surface contact in the whole circumferential direction in the adjusting mechanism M 4 and the adjusting mechanism M 7 .
  • the sleeve supporting member 80 is brought into surface contact with the sleeve 76 in the whole circumferential direction.
  • the golf club having the two or more specifications capable of being adjusted independently enables adjustments corresponding to situations such as course setting, weather, and a condition of a player.
  • a combination of specifications other than the above description enables adjustments corresponding to various situations.
  • a head having the adjusting mechanism M 1 (face angle adjusting mechanism) and the adjusting mechanism M 5 (a head-center-of-gravity position adjusting mechanism) was produced.
  • a front member 4 and back member 6 of the head were produced by a lost-wax precision casting using a titanium alloy (Ti-6Al-4V).
  • a material of a connecting member 8 (screw) was a titanium alloy (Ti-6Al-4V).
  • a screw hole into which a weight body 104 (screw) of the adjusting mechanism M 5 was screwed was formed in a sole of the back member 6 , and was produced by NC processing.
  • a shaft (carbon shaft) and a grip were mounted to the head, to obtain a golf club according to example 1.
  • the golf club was a number three wood golf club.
  • a golf club having the adjusting mechanism M 1 (face angle adjusting mechanism), the adjusting mechanism M 4 (lie angle adjusting mechanism), the adjusting mechanism M 5 (a head-center-of-gravity position adjusting mechanism), and the adjusting mechanism M 6 (swingweight adjusting mechanism) was produced.
  • the adjusting mechanism M 4 was added to a hosel part of the back member of the example 1, and a grip with the adjusting mechanism M 5 shown in FIG. 17 was mounted in place of the grip of the example 1.
  • a material of a sleeve 76 was an aluminium alloy.
  • a material of a sleeve supporting member 80 was an aluminium alloy.
  • a golf club of example 2 was obtained in the same manner as in the example 1 as for the rest.
  • a head of comparative example 1 was obtained in the same manner as in the example 1 except that the head did not have all the adjusting mechanisms.
  • the head was obtained by welding a front member 4 to a back member 6 .
  • the same shaft and grip as those of the example 1 were mounted to the head, to obtain a golf club according to the comparative example 1.
  • the same structure as that of the above-mentioned adjusting mechanism M 7 was formed in the back member 6 of the example 1.
  • the same front member as that of the example 1 was welded to the back member, to obtain a head.
  • the screw groove of the inner surface of the sleeve Sv in the adjusting mechanism M 7 was removed, to form a circumferential surface.
  • the sleeve Sv was bonded to the tip part of the same shaft as that of the example 1. That is, the shaft was directly bonded to the inner surface of the sleeve Sv without using the screw cylinder 135 .
  • a shaft insertion hole was inclined to a hosel hole 142 as in the above-mentioned sleeve Sv 1 (to see FIG.
  • the inclination angle ⁇ 1 (see FIG. 22 ) was set to 1.0 degree.
  • a material of the sleeve Sv was an aluminium alloy.
  • a material of an engaging member 140 was a titanium alloy (Ti-6Al-4V).
  • the same grip as that of the example 1 was mounted, to obtain a golf club according to comparative example 2.
  • the shaft can be detachably mounted to the head by a screw mechanism.
  • a loft angle, a lie angle, and a face angle are varied in relation to each other by a relative position relation in a circumferential direction between the sleeve Sv and the hosel hole.
  • the example 1 can be adjusted to the specification of the comparative example 1 shown in Table 1.
  • the example 1 was adjusted to the specification shown in Table 1, and an evaluation test thereof was performed.
  • the example 2 can be adjusted to the specification of the comparative example 1 shown in Table 1.
  • the example 2 was adjusted to the specification shown in Table 1, and an evaluation test thereof was performed.
  • a club having a state of comparative example 2-1 was produced using the comparative example 2, and an evaluation test thereof was performed.
  • a club having a state of comparative example 2-2 was produced by varying a relative position relation in a circumferential direction between a sleeve Sv (shaft) and a hosel hole, and an evaluation test thereof was performed.
  • a head having the adjusting mechanism M 1 (face angle adjusting mechanism) and the adjusting mechanism M 4 (lie angle adjusting mechanism) was produced.
  • a front member 4 and back member 6 of the head were produced by a lost-wax precision casting using a titanium alloy (Ti-6Al-4V).
  • the adjusting mechanism M 4 was provided in a hosel part of the back member 6 .
  • a shaft (carbon shaft) and a grip were mounted to the head, to obtain a golf club according to example 3.
  • the golf club was a number three wood golf club.
  • a head of comparative example 3 was obtained in the same manner as in the comparative example 1 except that the specification was changed to the specification of Table 2.
  • the same shaft and grip as those of the example 1 were mounted to the head, to obtain a golf club according to comparative example 3.
  • a head of comparative example 4 was obtained in the same manner as in the comparative example 2 except that the specification was changed to the specification of Table 2.
  • a shaft is detachably mounted to a head by a screw mechanism.
  • a loft angle, a lie angle, and a face angle are varied in relation to each other by a relative position relation in a circumferential direction between a sleeve Sv and a hosel hole.
  • the golf club of the example 3 was adjusted to a specification of example 3-1 shown in Table 2 using the adjusting mechanism, and was evaluated. Furthermore, the golf club of the example 3 was adjusted to a specification of example 3-2 shown in Table 2 using the adjusting mechanism, and was evaluated.
  • a club having a state of comparative example 4-1 was produced using the comparative example 4, and an evaluation test thereof was performed.
  • a club having a state of comparative example 4-2 was produced by varying a relative position relation in a circumferential direction between a sleeve Sv (shaft) and a hosel hole, and an evaluation test thereof was performed.
  • a head having the adjusting mechanism M 1 (loft angle adjusting mechanism) and the adjusting mechanism M 4 (lie angle adjusting mechanism) was produced.
  • a front member 4 and back member 6 of the head were produced by a lost-wax precision casting using a titanium alloy (Ti-6Al-4V).
  • the adjusting mechanism M 4 was provided in a hosel part of the back member 6 .
  • a shaft (carbon shaft) and a grip were mounted to the head, to obtain a golf club according to example 4.
  • the golf club was a number three wood golf club.
  • the example 4 was compared with the comparative examples 3 and 4.
  • the specifications and evaluation results of the examples and comparative examples are shown in the following Table 3.
  • the golf club of the example 4 was adjusted to a specification of example 4-1 shown in Table 3 using the adjusting mechanism, and was evaluated. Furthermore, the golf club of the example 4 was adjusted to a specification of example 4-2 shown in Table 3 using the adjusting mechanism, and was evaluated. The example 4 had excellent adjustability, and provided good results in resolution of slice and a flight distance.
  • a head having the adjusting mechanism M 1 (face angle adjusting mechanism), the adjusting mechanism M 4 (lie angle adjusting mechanism), and the adjusting mechanism M 5 (head-center-of-gravity position adjusting mechanism) was produced.
  • a front member 4 and back member 6 of the head were produced by a lost-wax precision casting using a titanium alloy (Ti-6Al-4V).
  • a screw hole of the adjusting mechanism M 5 was formed in a sole part of the back member 6 .
  • the screw hole was produced by NC processing.
  • the adjusting mechanism M 4 was provided in a hosel part of the back member 6 .
  • a shaft (carbon shaft) and a grip were mounted to the head, to obtain a golf club according to example 5.
  • the golf club was a number three wood golf club.
  • the example 5 was compared with the comparative examples 3 and 4.
  • the specifications and evaluation results of the examples and comparative examples are shown in the following Table 4.
  • the golf club of the example 5 was adjusted to a specification of example 5-1 shown in Table 4 using the adjusting mechanism, and was evaluated. Furthermore, the golf club of the example was adjusted to a specification of example 5-2 shown in Table 4 using the adjusting mechanism, and was evaluated.
  • the example 5 had excellent adjustability, and provided good results in resolution of slice and a flight distance.
  • a head having the adjusting mechanism M 1 (loft angle adjusting mechanism), the adjusting mechanism M 4 (lie angle adjusting mechanism), and the adjusting mechanism M 5 (head-center-of-gravity position adjusting mechanism) was produced.
  • a front member 4 and back member 6 of the head were produced by a lost-wax precision casting using a titanium alloy (Ti-6Al-4V).
  • a screw hole of the adjusting mechanism M 5 was formed in a sole part of the back member 6 .
  • the screw hole was produced by NC processing.
  • the adjusting mechanism M 4 was provided in a hosel part of the back member 6 .
  • a shaft (carbon shaft) and a grip were mounted to the head, to obtain a golf club according to example 6.
  • the golf club was a number three wood golf club.
  • the example 6 was compared with the comparative examples 3 and 4.
  • the specifications and evaluation results of the examples and comparative examples are shown in the following Table 5.
  • the golf club of the example 6 can be adjusted to the specification of the comparative example 3.
  • the golf club of the example 6 was adjusted to a specification of example 6-1 shown in Table 5 using the adjusting mechanism, and was evaluated.
  • the golf club of the example 6 was adjusted to a specification of example 6-2 shown in Table 5 using the adjusting mechanism, and was evaluated.
  • the example 6 had excellent adjustability, and provided good results in resolution of slice and a flight distance.
  • a head having the adjusting mechanism M 1 (face angle adjusting mechanism) and the adjusting mechanism M 3 (club length adjusting mechanism) was produced.
  • a front member 4 and back member 6 of the head were produced by a lost-wax precision casting using a titanium alloy (Ti-6Al-4V).
  • the adjusting mechanism M 3 was provided in a hosel part of the back member 6 .
  • a shaft (carbon shaft) and a grip were mounted to the head, to obtain a golf club according to example 7.
  • the golf club was a number three wood golf club.
  • the example 7 was compared with the comparative examples 3 and 4.
  • the specifications and evaluation results of the examples and comparative examples are shown in the following Table 6.
  • the golf club of the example 7 can be adjusted to the specification of the comparative example 3.
  • the golf club of the example 7 was adjusted to a specification of example 7-1 shown in Table 6 using the adjusting mechanism, and was evaluated.
  • the golf club of the example 7 was adjusted to a specification of example 7-2 shown in Table 6 using the adjusting mechanism, and was evaluated.
  • the example 7 had excellent adjustability, and provided good results in resolution of slice and a flight distance.
  • a head having the adjusting mechanism M 1 (loft angle adjusting mechanism) and the adjusting mechanism M 3 (club length adjusting mechanism) was produced.
  • a front member 4 and back member 6 of the head were produced by a lost-wax precision casting using a titanium alloy (Ti-6Al-4V).
  • the adjusting mechanism M 3 was provided in a hosel part of the back member 6 .
  • a shaft (carbon shaft) and a grip were mounted to the head, to obtain a golf club according to example 8.
  • the golf club was a number three wood golf club.
  • the example 8 was compared with the comparative examples 3 and 4.
  • the specifications and evaluation results of the examples and comparative examples are shown in the following Table 7.
  • the golf club of the example 8 can be adjusted to the specification of the comparative example 3.
  • the golf club of the example 8 was adjusted to a specification of example 8-1 shown in Table 7 using the adjusting mechanism, and was evaluated.
  • the golf club of the example 8 was adjusted to a specification of example 8-2 shown in Table 7 using the adjusting mechanism, and was evaluated.
  • the example 8 had excellent adjustability, and provided good results in resolution of slice and a flight distance.
  • a club having the adjusting mechanism M 1 (face angle adjusting mechanism), the adjusting mechanism M 3 (club length adjusting mechanism), the adjusting mechanism M 5 (head-center-of-gravity distance adjusting mechanism), and the adjusting mechanism M 6 (swingweight adjusting mechanism) was produced.
  • a front member 4 and back member 6 of the head were produced by a lost-wax precision casting using a titanium alloy (Ti-6Al-4V).
  • the adjusting mechanism M 3 was provided in a hosel part of the back member 6 .
  • a screw hole of the adjusting mechanism M 5 was formed in a sole part of the back member 6 .
  • a shaft grip assembly having the adjusting mechanism M 6 was mounted to the head, to obtain a golf club according to example 9.
  • the golf club was a number three wood golf club.
  • the example 9 was compared with the comparative examples 3 and 4.
  • the specifications and evaluation results of the examples and comparative examples are shown in the following Table 8.
  • the golf club of the example 9 can be adjusted to the specification of the comparative example 3.
  • the golf club of the example 9 was adjusted to a specification of example 9-1 shown in Table 8 using the adjusting mechanism, and was evaluated.
  • the golf club of the example 9 was adjusted to a specification of example 9-2 shown in Table 8 using the adjusting mechanism, and was evaluated. Also in the test, the example 9 had excellent adjustability, and provided good results in resolution of slice and a flight distance.
  • a club having the adjusting mechanism M 1 (loft angle adjusting mechanism), the adjusting mechanism M 3 (club length adjusting mechanism), the adjusting mechanism M 5 (head-center-of-gravity distance adjusting mechanism), and the adjusting mechanism M 6 (swingweight adjusting mechanism) was produced.
  • a front member 4 and back member 6 of the head were produced by a lost-wax precision casting using a titanium alloy (Ti-6Al-4V).
  • the adjusting mechanism M 3 was provided in a hosel part of the back member 6 .
  • a screw hole of the adjusting mechanism M 5 was formed in a sole part of the back member 6 .
  • a shaft grip assembly having the adjusting mechanism M 6 was mounted to the head, to obtain a golf club according to example 10.
  • the golf club was a number three wood golf club.
  • the example 10 was compared with the comparative examples 3 and 4.
  • the specifications and evaluation results of the examples and comparative examples are shown in the following Table 9.
  • the golf club of the example 10 can be adjusted to the specification of the comparative example 3.
  • the golf club of the example 10 was adjusted to a specification of example 10-1 shown in Table 9 using the adjusting mechanism, and was evaluated.
  • the golf club of the example 10 was adjusted to a specification of example 10-2 shown in Table 9 using the adjusting mechanism, and was evaluated.
  • the example 10 had excellent adjustability, and provided good results in resolution of slice and a flight distance.
  • a golf club provided with the adjusting mechanism M 7 and the adjusting mechanism M 8 was produced.
  • the adjusting mechanism M 7 was provided with two sleeves Sv having the inclination angle ⁇ 1 of 0 degree. Positions of shaft insertion holes 150 were made different between the two sleeves Sv.
  • an axis line of the shaft insertion hole 150 was coaxial with a central axis line of a sleeve outer surface.
  • the axis line of the shaft insertion hole deviated from the central axis line of the sleeve outer surface. That is, in the second sleeve Sv, the shaft insertion hole was eccentric.
  • the adjusting mechanism M 8 was provided with two changing back members E 8 having different positions of centers of gravity.
  • a face progression could be changed by changing the sleeve Sv.
  • a lie angle, a face angle, and a loft angle were not varied by changing the sleeve Sv.
  • a position of a center of gravity of a head could be changed by changing the changing back members E 8 .
  • the face progression and the position of the center of gravity of the head could be adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 1 and the adjusting mechanism M 9 was produced.
  • the adjusting mechanism M 1 was provided with two changing front members E 4 which are different only in the loft angles.
  • the adjusting mechanism M 9 was provided with two outer side grip members 196 having different thicknesses.
  • a loft angle could be changed by changing the changing front member E 4 .
  • a face angle was not varied by changing the changing front member E 4 .
  • a thickness of a grip could be changed by changing the outer side grip member 196 .
  • the loft angle and the thickness of the grip could be adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 1 and the adjusting mechanism M 10 was produced.
  • the adjusting mechanism M 1 was provided with two changing front members E 4 which are different only in the face angles.
  • the adjusting mechanism M 10 was provided with one extending member 252 b.
  • a face angle could be changed by changing the changing front member E 4 .
  • a loft angle was not varied by changing the changing front member E 4 .
  • a club length could be changed by mounting/demounting the extending member 252 b . The face angle and the club length could be adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 1 and the adjusting mechanism M 11 was produced.
  • An exploded perspective view of a head according to example 14 is the same as that of the head 268 shown in FIGS. 33 and 34 .
  • a front member can be changed, and an adjusting intermediate member can be also changed.
  • a face angle and a loft angle can be adjusted by changing only the front member.
  • the face angle and the loft angle can be adjusted by changing only the adjusting intermediate member.
  • various adjustments are enabled by combining the front members with the adjusting intermediate members.
  • a golf club provided with the adjusting mechanism M 1 and the adjusting mechanism M 6 was produced.
  • the adjusting mechanism M 1 was provided with two changing front members E 4 which are different only in the face angles (see FIG. 3 ).
  • the adjusting mechanism M 6 was provided with a plurality of weight bodies Wg having different weights in relation to each other (see FIG. 17 ).
  • a face angle could be changed by changing the changing front member E 4 .
  • a swingweight could be changed by changing and mounting/demounting the weight body Wg. The face angle and the swingweight could be adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 1 and the adjusting mechanism M 8 was produced.
  • a head according to the example 16 was the same as the above-mentioned head 170 (see FIGS. 24 and 25 ).
  • a plurality of front members 172 shown in FIG. 24 was prepared as the adjusting mechanism M 1 .
  • the plurality of front members 172 had different face angles in relation to each other.
  • a plurality of back members 174 having different volumes in relation to each other was prepared as the adjusting mechanism M 8 .
  • a face angle could be changed by changing the front member 172 .
  • a head volume (a depth of a center of gravity and a moment of inertia of the head) could be changed by changing the back member 174 .
  • the face angle and the head volume (the depth of a center of gravity and the moment of inertia of the head) could be adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 1 and the adjusting mechanism M 10 was produced.
  • the adjusting mechanism M 1 was provided with two front members E 4 which are different only in the face angles (see FIG. 3 ).
  • the adjusting mechanism M 10 was provided with two extending members 252 b having an identical shape in relation to each other (see FIG. 31 ).
  • a face angle could be changed by changing the changing front member E 4 .
  • a club length (swingweight) could be changed by the number of the mounted extending members 252 b .
  • the face angle and the club length (swingweight) could be adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 5 and the adjusting mechanism M 6 was produced.
  • the adjusting mechanism M 5 was provided with one weight body 104 (see FIG. 14 ).
  • the adjusting mechanism M 6 was provided with a plurality of weight bodies Wg having different weights in relation to each other (see FIG. 17 ).
  • a position of a center of gravity of a head could be changed by changing a position of the weight body 104 .
  • a swingweight could be changed by changing and mounting/demounting the weight body Wg. The position of the center of gravity of the head and the swingweight could be adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 5 and the adjusting mechanism M 8 was produced.
  • a basic structure of a head according to the example 19 was set as shown in FIG. 24 . Furthermore, a plurality of disposing holes Wh (see FIG. 15 ) was formed in a front member 172 (see FIG. 24 ) of the head. That is, the adjusting mechanism M 5 was provided in the front member 172 . The adjusting mechanism M 5 may be provided in the back member 174 (see FIG. 24 ). That is, a plurality of disposing holes Wh (see FIG. 15 ) may be formed in the back member 174 .
  • the adjusting mechanism M 5 was provided with one weight body 104 (see FIG. 14 ).
  • the adjusting mechanism M 8 was provided with a plurality of back member 174 having different volumes (see FIG. 24 ).
  • a position of a center of gravity of the head could be changed by changing a position of the weight body 104 .
  • a head volume could be changed by changing the back member 174 .
  • the position of the center of gravity of the head and the head volume could be adjusted independently of each other.
  • the position of the center of gravity of the head was also varied by the adjusting mechanisms M 5 , and was also varied by the adjusting mechanisms M 8 . Therefore, the position of the center of gravity of the head could be variously adjusted. That is, a high degree of freedom was achieved in adjustment of the position of the center of gravity of the head.
  • a golf club provided with the adjusting mechanism M 5 and the adjusting mechanism M 9 was produced.
  • the adjusting mechanism M 5 was provided with one weight body 104 (see FIG. 14 ).
  • the adjusting mechanism M 9 was provided with a plurality of outer side grip members 196 having different thicknesses (see FIGS. 27 and 28 ).
  • a position of a center of gravity of a head could be changed by changing a position of the weight body 104 .
  • a thickness of a grip could be changed by changing the outer side grip member 196 .
  • the position of the center of gravity of the head and the thickness of the grip could be adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 5 and the adjusting mechanism M 10 was produced.
  • the adjusting mechanism M 5 was provided with one weight body 104 (see FIG. 14 ).
  • the adjusting mechanism M 10 was provided with two extending members 252 b having an identical shape in relation to each other (see FIG. 31 ).
  • a position of a center of gravity of a head could be changed by changing a position of the weight body 104 .
  • a club length (grip length and swingweight) could be changed by the number of the mounted extending members 252 b .
  • the position of the center of gravity of the head and the club length were adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 6 and the adjusting mechanism M 8 was produced.
  • the adjusting mechanism M 6 was provided with a plurality of weight bodies Wg having different weights in relation to each other (see FIG. 17 ).
  • the adjusting mechanism M 8 was provided with a plurality of back members 174 having different shapes (see FIGS. 24 and 25 ).
  • a swingweight was changed by mounting/demounting and changing the weight body Wg. Furthermore, in the golf club, a head shape could be changed by changing the back member 174 . The swingweight and the head shape were adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 6 and the adjusting mechanism M 9 was produced.
  • the adjusting mechanism M 6 was provided with a plurality of weight bodies Wg having different weights in relation to each other (see FIG. 17 ).
  • the adjusting mechanism M 9 was provided with a plurality of outer side grip members 196 having different thicknesses (see FIGS. 27 and 28 ).
  • a swingweight was changed by mounting/demounting and changing the weight body Wg. Furthermore, in the golf club, a grip outer diameter was changed by changing the outer side grip member 196 . The swingweight and the grip outer diameter were adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 6 and the adjusting mechanism M 10 was produced.
  • FIG. 36 is an exploded view of a grip part of the golf club according to the example 24.
  • the golf club has the above-mentioned grip 252 (see FIG. 31 ). Furthermore, the golf club has two weight bodies Wg.
  • a first weight body Wg 1 has a head part 300 and a body part 302 .
  • the head part 300 is a disk-shaped.
  • the body part 302 is a male screw.
  • the head part 300 is coaxial with the body part 302 .
  • a second weight body Wg 2 has a head part 300 and a body part 306 .
  • the body part 306 is a male screw.
  • the head part 300 is coaxial with the body part 306 .
  • An axial length of the body part 302 is different from that of the body part 300 . The difference causes a weight difference between the weight body Wg 1 and the weight body Wg 2 .
  • the body parts 302 and 306 of the weight body Wg conforms to a screw hole sc 4 of the extending member 252 b .
  • the body parts 302 and 306 can be screwed into the screw hole sc 4 .
  • the adjusting mechanism M 10 in the example 24 is the same as that of the embodiment of FIG. 30 .
  • the adjusting mechanism M 6 in the example 24 is different from that of the embodiment of FIG. 17 .
  • the adjusting mechanism M 6 includes the weight body Wg and the extending member 252 b as shown in FIG. 36 .
  • a swingweight can be adjusted by mounting any of the weight bodies Wg to the extending member 252 b .
  • the swingweight can be adjusted by presence or absence of the mounted weight body Wg.
  • the swingweight was changed by mounting/demounting and changing the weight body Wg. Furthermore, in the golf club, the swingweight and a club length were changed by the number of the mounted extending members 252 b . In the example 24, the club length can be adjusted. In the example 24, the swingweight could be variously adjusted by a combinations of the extending member 252 b and the weight body Wg.
  • a golf club provided with the adjusting mechanism M 8 and the adjusting mechanism M 9 was produced.
  • the adjusting mechanism M 8 was provided with two back members 174 having different positions of centers of gravity (see FIGS. 24 and 25 ).
  • the adjusting mechanism M 9 was provided with a plurality of outer side grip members 196 having different thicknesses (see FIGS. 27 and 28 ).
  • a position of a center of gravity of a head was changed by changing the back member 174 in the golf club according to the example 25. Furthermore, in the golf club, a grip outer diameter was changed by changing the outer side grip member 196 . The position of the center of gravity of the head and the grip outer diameter were adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 8 and the adjusting mechanism M 10 was produced.
  • the adjusting mechanism M 8 was provided with two back members 174 having different positions of centers of gravity (see FIGS. 24 and 25 ).
  • the adjusting mechanism M 10 was provided with two extending members 252 b having an identical shape in relation to each other (see FIG. 31 ).
  • a position of a center of gravity of a head was changed by changing the back member 174 . Furthermore, in the golf club, a swingweight and a club length were changed by the number of the mounted extending members 252 b . The position of the center of gravity of the head and the swingweight (club length) were adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 6 and the adjusting mechanism M 12 was produced.
  • the adjusting mechanism M 6 was provided with a plurality of weight bodies Wg having different weights in relation to each other (see FIG. 17 ).
  • the adjusting mechanism M 12 was provided with a plurality of front members 282 having different loft angles in relation to each other (see FIG. 35 ).
  • a swingweight was changed by changing the weight body Wg. Furthermore, in the golf club, a loft angle was changed by changing the front member 282 . The swingweight and the loft angle were adjusted independently of each other.
  • a golf club provided with the adjusting mechanism M 10 and the adjusting mechanism M 12 was produced.
  • the adjusting mechanism M 10 was provided with two extending members 252 b having an identical shape in relation to each other (see FIG. 31 ).
  • the adjusting mechanism M 12 was provided with a plurality of front members 282 having different loft angles in relation to each other (see FIG. 35 ).
  • a club length (swingweight) was changed by the number of the mounted extending members 252 b . Furthermore, in the golf club, a loft angle was changed by changing the front member 282 . The club length (swingweight) and the loft angle were adjusted independently of each other.
  • the combination of the adjusting mechanisms is not restricted to the combinations in these examples.
  • the number of the combinations of the adjusting mechanisms is not also restricted. For example, any two selected from the adjusting mechanisms M 1 to M 12 can be combined. Any three selected from the adjusting mechanisms M 1 to M 12 can be combined.
  • the invention described above can be applied to all golf clubs such as a wood type, utility type, hybrid type, iron type, and putter type golf clubs.

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  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Golf Clubs (AREA)
US13/234,208 2010-09-17 2011-09-16 Golf club Abandoned US20120071258A1 (en)

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FR3088013A1 (fr) * 2018-11-07 2020-05-08 Andre Thaon D'arnoldi Procede de reglage d’une serie de clubs de golf et serie de clubs de golf ainsi reglee
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JP5893501B2 (ja) * 2012-04-27 2016-03-23 ダンロップスポーツ株式会社 ゴルフクラブ
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JP6136285B2 (ja) * 2013-01-17 2017-05-31 ヤマハ株式会社 ゴルフクラブ
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US9561404B2 (en) * 2011-03-10 2017-02-07 Callaway Golf Company Adjustable golf club shaft and hosel assembly
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US20150111658A1 (en) 2015-04-23
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US20170128788A1 (en) 2017-05-11

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